FFmpeg
movenc.c
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1 /*
2  * MOV, 3GP, MP4 muxer
3  * Copyright (c) 2003 Thomas Raivio
4  * Copyright (c) 2004 Gildas Bazin <gbazin at videolan dot org>
5  * Copyright (c) 2009 Baptiste Coudurier <baptiste dot coudurier at gmail dot com>
6  *
7  * This file is part of FFmpeg.
8  *
9  * FFmpeg is free software; you can redistribute it and/or
10  * modify it under the terms of the GNU Lesser General Public
11  * License as published by the Free Software Foundation; either
12  * version 2.1 of the License, or (at your option) any later version.
13  *
14  * FFmpeg is distributed in the hope that it will be useful,
15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17  * Lesser General Public License for more details.
18  *
19  * You should have received a copy of the GNU Lesser General Public
20  * License along with FFmpeg; if not, write to the Free Software
21  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
22  */
23 
24 #include <stdint.h>
25 #include <inttypes.h>
26 
27 #include "movenc.h"
28 #include "avformat.h"
29 #include "avio_internal.h"
30 #include "dovi_isom.h"
31 #include "riff.h"
32 #include "avio.h"
33 #include "isom.h"
34 #include "av1.h"
35 #include "avc.h"
36 #include "libavcodec/ac3_parser_internal.h"
37 #include "libavcodec/dnxhddata.h"
38 #include "libavcodec/flac.h"
39 #include "libavcodec/get_bits.h"
40 
41 #include "libavcodec/internal.h"
42 #include "libavcodec/put_bits.h"
43 #include "libavcodec/vc1_common.h"
44 #include "libavcodec/raw.h"
45 #include "internal.h"
46 #include "libavutil/avstring.h"
47 #include "libavutil/channel_layout.h"
48 #include "libavutil/intfloat.h"
49 #include "libavutil/mathematics.h"
50 #include "libavutil/libm.h"
51 #include "libavutil/opt.h"
52 #include "libavutil/dict.h"
53 #include "libavutil/pixdesc.h"
54 #include "libavutil/stereo3d.h"
55 #include "libavutil/timecode.h"
56 #include "libavutil/dovi_meta.h"
57 #include "libavutil/color_utils.h"
58 #include "hevc.h"
59 #include "rtpenc.h"
60 #include "mov_chan.h"
61 #include "movenc_ttml.h"
62 #include "ttmlenc.h"
63 #include "vpcc.h"
64 
65 static const AVOption options[] = {
66  { "movflags", "MOV muxer flags", offsetof(MOVMuxContext, flags), AV_OPT_TYPE_FLAGS, {.i64 = 0}, INT_MIN, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM, "movflags" },
67  { "rtphint", "Add RTP hint tracks", 0, AV_OPT_TYPE_CONST, {.i64 = FF_MOV_FLAG_RTP_HINT}, INT_MIN, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM, "movflags" },
68  { "moov_size", "maximum moov size so it can be placed at the begin", offsetof(MOVMuxContext, reserved_moov_size), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM, 0 },
69  { "empty_moov", "Make the initial moov atom empty", 0, AV_OPT_TYPE_CONST, {.i64 = FF_MOV_FLAG_EMPTY_MOOV}, INT_MIN, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM, "movflags" },
70  { "frag_keyframe", "Fragment at video keyframes", 0, AV_OPT_TYPE_CONST, {.i64 = FF_MOV_FLAG_FRAG_KEYFRAME}, INT_MIN, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM, "movflags" },
71  { "frag_every_frame", "Fragment at every frame", 0, AV_OPT_TYPE_CONST, {.i64 = FF_MOV_FLAG_FRAG_EVERY_FRAME}, INT_MIN, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM, "movflags" },
72  { "separate_moof", "Write separate moof/mdat atoms for each track", 0, AV_OPT_TYPE_CONST, {.i64 = FF_MOV_FLAG_SEPARATE_MOOF}, INT_MIN, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM, "movflags" },
73  { "frag_custom", "Flush fragments on caller requests", 0, AV_OPT_TYPE_CONST, {.i64 = FF_MOV_FLAG_FRAG_CUSTOM}, INT_MIN, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM, "movflags" },
74  { "isml", "Create a live smooth streaming feed (for pushing to a publishing point)", 0, AV_OPT_TYPE_CONST, {.i64 = FF_MOV_FLAG_ISML}, INT_MIN, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM, "movflags" },
75  { "faststart", "Run a second pass to put the index (moov atom) at the beginning of the file", 0, AV_OPT_TYPE_CONST, {.i64 = FF_MOV_FLAG_FASTSTART}, INT_MIN, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM, "movflags" },
76  { "omit_tfhd_offset", "Omit the base data offset in tfhd atoms", 0, AV_OPT_TYPE_CONST, {.i64 = FF_MOV_FLAG_OMIT_TFHD_OFFSET}, INT_MIN, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM, "movflags" },
77  { "disable_chpl", "Disable Nero chapter atom", 0, AV_OPT_TYPE_CONST, {.i64 = FF_MOV_FLAG_DISABLE_CHPL}, INT_MIN, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM, "movflags" },
78  { "default_base_moof", "Set the default-base-is-moof flag in tfhd atoms", 0, AV_OPT_TYPE_CONST, {.i64 = FF_MOV_FLAG_DEFAULT_BASE_MOOF}, INT_MIN, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM, "movflags" },
79  { "dash", "Write DASH compatible fragmented MP4", 0, AV_OPT_TYPE_CONST, {.i64 = FF_MOV_FLAG_DASH}, INT_MIN, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM, "movflags" },
80  { "cmaf", "Write CMAF compatible fragmented MP4", 0, AV_OPT_TYPE_CONST, {.i64 = FF_MOV_FLAG_CMAF}, INT_MIN, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM, "movflags" },
81  { "frag_discont", "Signal that the next fragment is discontinuous from earlier ones", 0, AV_OPT_TYPE_CONST, {.i64 = FF_MOV_FLAG_FRAG_DISCONT}, INT_MIN, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM, "movflags" },
82  { "delay_moov", "Delay writing the initial moov until the first fragment is cut, or until the first fragment flush", 0, AV_OPT_TYPE_CONST, {.i64 = FF_MOV_FLAG_DELAY_MOOV}, INT_MIN, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM, "movflags" },
83  { "global_sidx", "Write a global sidx index at the start of the file", 0, AV_OPT_TYPE_CONST, {.i64 = FF_MOV_FLAG_GLOBAL_SIDX}, INT_MIN, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM, "movflags" },
84  { "skip_sidx", "Skip writing of sidx atom", 0, AV_OPT_TYPE_CONST, {.i64 = FF_MOV_FLAG_SKIP_SIDX}, INT_MIN, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM, "movflags" },
85  { "write_colr", "Write colr atom even if the color info is unspecified (Experimental, may be renamed or changed, do not use from scripts)", 0, AV_OPT_TYPE_CONST, {.i64 = FF_MOV_FLAG_WRITE_COLR}, INT_MIN, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM, "movflags" },
86  { "prefer_icc", "If writing colr atom prioritise usage of ICC profile if it exists in stream packet side data", 0, AV_OPT_TYPE_CONST, {.i64 = FF_MOV_FLAG_PREFER_ICC}, INT_MIN, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM, "movflags" },
87  { "write_gama", "Write deprecated gama atom", 0, AV_OPT_TYPE_CONST, {.i64 = FF_MOV_FLAG_WRITE_GAMA}, INT_MIN, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM, "movflags" },
88  { "use_metadata_tags", "Use mdta atom for metadata.", 0, AV_OPT_TYPE_CONST, {.i64 = FF_MOV_FLAG_USE_MDTA}, INT_MIN, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM, "movflags" },
89  { "skip_trailer", "Skip writing the mfra/tfra/mfro trailer for fragmented files", 0, AV_OPT_TYPE_CONST, {.i64 = FF_MOV_FLAG_SKIP_TRAILER}, INT_MIN, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM, "movflags" },
90  { "negative_cts_offsets", "Use negative CTS offsets (reducing the need for edit lists)", 0, AV_OPT_TYPE_CONST, {.i64 = FF_MOV_FLAG_NEGATIVE_CTS_OFFSETS}, INT_MIN, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM, "movflags" },
91  FF_RTP_FLAG_OPTS(MOVMuxContext, rtp_flags),
92  { "skip_iods", "Skip writing iods atom.", offsetof(MOVMuxContext, iods_skip), AV_OPT_TYPE_BOOL, {.i64 = 1}, 0, 1, AV_OPT_FLAG_ENCODING_PARAM},
93  { "iods_audio_profile", "iods audio profile atom.", offsetof(MOVMuxContext, iods_audio_profile), AV_OPT_TYPE_INT, {.i64 = -1}, -1, 255, AV_OPT_FLAG_ENCODING_PARAM},
94  { "iods_video_profile", "iods video profile atom.", offsetof(MOVMuxContext, iods_video_profile), AV_OPT_TYPE_INT, {.i64 = -1}, -1, 255, AV_OPT_FLAG_ENCODING_PARAM},
95  { "frag_duration", "Maximum fragment duration", offsetof(MOVMuxContext, max_fragment_duration), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM},
96  { "min_frag_duration", "Minimum fragment duration", offsetof(MOVMuxContext, min_fragment_duration), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM},
97  { "frag_size", "Maximum fragment size", offsetof(MOVMuxContext, max_fragment_size), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM},
98  { "ism_lookahead", "Number of lookahead entries for ISM files", offsetof(MOVMuxContext, ism_lookahead), AV_OPT_TYPE_INT, {.i64 = 0}, 0, 255, AV_OPT_FLAG_ENCODING_PARAM},
99  { "video_track_timescale", "set timescale of all video tracks", offsetof(MOVMuxContext, video_track_timescale), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM},
100  { "brand", "Override major brand", offsetof(MOVMuxContext, major_brand), AV_OPT_TYPE_STRING, {.str = NULL}, .flags = AV_OPT_FLAG_ENCODING_PARAM },
101  { "use_editlist", "use edit list", offsetof(MOVMuxContext, use_editlist), AV_OPT_TYPE_BOOL, {.i64 = -1}, -1, 1, AV_OPT_FLAG_ENCODING_PARAM},
102  { "fragment_index", "Fragment number of the next fragment", offsetof(MOVMuxContext, fragments), AV_OPT_TYPE_INT, {.i64 = 1}, 1, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM},
103  { "mov_gamma", "gamma value for gama atom", offsetof(MOVMuxContext, gamma), AV_OPT_TYPE_FLOAT, {.dbl = 0.0 }, 0.0, 10, AV_OPT_FLAG_ENCODING_PARAM},
104  { "frag_interleave", "Interleave samples within fragments (max number of consecutive samples, lower is tighter interleaving, but with more overhead)", offsetof(MOVMuxContext, frag_interleave), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM },
105  { "encryption_scheme", "Configures the encryption scheme, allowed values are none, cenc-aes-ctr", offsetof(MOVMuxContext, encryption_scheme_str), AV_OPT_TYPE_STRING, {.str = NULL}, .flags = AV_OPT_FLAG_ENCODING_PARAM },
106  { "encryption_key", "The media encryption key (hex)", offsetof(MOVMuxContext, encryption_key), AV_OPT_TYPE_BINARY, .flags = AV_OPT_FLAG_ENCODING_PARAM },
107  { "encryption_kid", "The media encryption key identifier (hex)", offsetof(MOVMuxContext, encryption_kid), AV_OPT_TYPE_BINARY, .flags = AV_OPT_FLAG_ENCODING_PARAM },
108  { "use_stream_ids_as_track_ids", "use stream ids as track ids", offsetof(MOVMuxContext, use_stream_ids_as_track_ids), AV_OPT_TYPE_BOOL, {.i64 = 0}, 0, 1, AV_OPT_FLAG_ENCODING_PARAM},
109  { "write_tmcd", "force or disable writing tmcd", offsetof(MOVMuxContext, write_tmcd), AV_OPT_TYPE_BOOL, {.i64 = -1}, -1, 1, AV_OPT_FLAG_ENCODING_PARAM},
110  { "write_prft", "Write producer reference time box with specified time source", offsetof(MOVMuxContext, write_prft), AV_OPT_TYPE_INT, {.i64 = MOV_PRFT_NONE}, 0, MOV_PRFT_NB-1, AV_OPT_FLAG_ENCODING_PARAM, "prft"},
111  { "wallclock", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = MOV_PRFT_SRC_WALLCLOCK}, 0, 0, AV_OPT_FLAG_ENCODING_PARAM, "prft"},
112  { "pts", NULL, 0, AV_OPT_TYPE_CONST, {.i64 = MOV_PRFT_SRC_PTS}, 0, 0, AV_OPT_FLAG_ENCODING_PARAM, "prft"},
113  { "empty_hdlr_name", "write zero-length name string in hdlr atoms within mdia and minf atoms", offsetof(MOVMuxContext, empty_hdlr_name), AV_OPT_TYPE_BOOL, {.i64 = 0}, 0, 1, AV_OPT_FLAG_ENCODING_PARAM},
114  { "movie_timescale", "set movie timescale", offsetof(MOVMuxContext, movie_timescale), AV_OPT_TYPE_INT, {.i64 = MOV_TIMESCALE}, 1, INT_MAX, AV_OPT_FLAG_ENCODING_PARAM},
115  { NULL },
116 };
117 
118 static const AVClass mov_isobmff_muxer_class = {
119  .class_name = "mov/mp4/tgp/psp/tg2/ipod/ismv/f4v muxer",
120  .item_name = av_default_item_name,
121  .option = options,
122  .version = LIBAVUTIL_VERSION_INT,
123 };
124 
125 static int get_moov_size(AVFormatContext *s);
126 static int mov_write_single_packet(AVFormatContext *s, AVPacket *pkt);
127 
128 static int utf8len(const uint8_t *b)
129 {
130  int len = 0;
131  int val;
132  while (*b) {
133  GET_UTF8(val, *b++, return -1;)
134  len++;
135  }
136  return len;
137 }
138 
139 //FIXME support 64 bit variant with wide placeholders
140 static int64_t update_size(AVIOContext *pb, int64_t pos)
141 {
142  int64_t curpos = avio_tell(pb);
143  avio_seek(pb, pos, SEEK_SET);
144  avio_wb32(pb, curpos - pos); /* rewrite size */
145  avio_seek(pb, curpos, SEEK_SET);
146 
147  return curpos - pos;
148 }
149 
150 static int co64_required(const MOVTrack *track)
151 {
152  if (track->entry > 0 && track->cluster[track->entry - 1].pos + track->data_offset > UINT32_MAX)
153  return 1;
154  return 0;
155 }
156 
157 static int is_cover_image(const AVStream *st)
158 {
159  /* Eg. AV_DISPOSITION_ATTACHED_PIC | AV_DISPOSITION_TIMED_THUMBNAILS
160  * is encoded as sparse video track */
161  return st && st->disposition == AV_DISPOSITION_ATTACHED_PIC;
162 }
163 
164 static int rtp_hinting_needed(const AVStream *st)
165 {
166  /* Add hint tracks for each real audio and video stream */
167  if (is_cover_image(st))
168  return 0;
169  return st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO ||
170  st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO;
171 }
172 
173 /* Chunk offset atom */
174 static int mov_write_stco_tag(AVIOContext *pb, MOVTrack *track)
175 {
176  int i;
177  int mode64 = co64_required(track); // use 32 bit size variant if possible
178  int64_t pos = avio_tell(pb);
179  avio_wb32(pb, 0); /* size */
180  if (mode64)
181  ffio_wfourcc(pb, "co64");
182  else
183  ffio_wfourcc(pb, "stco");
184  avio_wb32(pb, 0); /* version & flags */
185  avio_wb32(pb, track->chunkCount); /* entry count */
186  for (i = 0; i < track->entry; i++) {
187  if (!track->cluster[i].chunkNum)
188  continue;
189  if (mode64 == 1)
190  avio_wb64(pb, track->cluster[i].pos + track->data_offset);
191  else
192  avio_wb32(pb, track->cluster[i].pos + track->data_offset);
193  }
194  return update_size(pb, pos);
195 }
196 
197 /* Sample size atom */
198 static int mov_write_stsz_tag(AVIOContext *pb, MOVTrack *track)
199 {
200  int equalChunks = 1;
201  int i, j, entries = 0, tst = -1, oldtst = -1;
202 
203  int64_t pos = avio_tell(pb);
204  avio_wb32(pb, 0); /* size */
205  ffio_wfourcc(pb, "stsz");
206  avio_wb32(pb, 0); /* version & flags */
207 
208  for (i = 0; i < track->entry; i++) {
209  tst = track->cluster[i].size / track->cluster[i].entries;
210  if (oldtst != -1 && tst != oldtst)
211  equalChunks = 0;
212  oldtst = tst;
213  entries += track->cluster[i].entries;
214  }
215  if (equalChunks && track->entry) {
216  int sSize = track->entry ? track->cluster[0].size / track->cluster[0].entries : 0;
217  sSize = FFMAX(1, sSize); // adpcm mono case could make sSize == 0
218  avio_wb32(pb, sSize); // sample size
219  avio_wb32(pb, entries); // sample count
220  } else {
221  avio_wb32(pb, 0); // sample size
222  avio_wb32(pb, entries); // sample count
223  for (i = 0; i < track->entry; i++) {
224  for (j = 0; j < track->cluster[i].entries; j++) {
225  avio_wb32(pb, track->cluster[i].size /
226  track->cluster[i].entries);
227  }
228  }
229  }
230  return update_size(pb, pos);
231 }
232 
233 /* Sample to chunk atom */
234 static int mov_write_stsc_tag(AVIOContext *pb, MOVTrack *track)
235 {
236  int index = 0, oldval = -1, i;
237  int64_t entryPos, curpos;
238 
239  int64_t pos = avio_tell(pb);
240  avio_wb32(pb, 0); /* size */
241  ffio_wfourcc(pb, "stsc");
242  avio_wb32(pb, 0); // version & flags
243  entryPos = avio_tell(pb);
244  avio_wb32(pb, track->chunkCount); // entry count
245  for (i = 0; i < track->entry; i++) {
246  if (oldval != track->cluster[i].samples_in_chunk && track->cluster[i].chunkNum) {
247  avio_wb32(pb, track->cluster[i].chunkNum); // first chunk
248  avio_wb32(pb, track->cluster[i].samples_in_chunk); // samples per chunk
249  avio_wb32(pb, 0x1); // sample description index
250  oldval = track->cluster[i].samples_in_chunk;
251  index++;
252  }
253  }
254  curpos = avio_tell(pb);
255  avio_seek(pb, entryPos, SEEK_SET);
256  avio_wb32(pb, index); // rewrite size
257  avio_seek(pb, curpos, SEEK_SET);
258 
259  return update_size(pb, pos);
260 }
261 
262 /* Sync sample atom */
263 static int mov_write_stss_tag(AVIOContext *pb, MOVTrack *track, uint32_t flag)
264 {
265  int64_t curpos, entryPos;
266  int i, index = 0;
267  int64_t pos = avio_tell(pb);
268  avio_wb32(pb, 0); // size
269  ffio_wfourcc(pb, flag == MOV_SYNC_SAMPLE ? "stss" : "stps");
270  avio_wb32(pb, 0); // version & flags
271  entryPos = avio_tell(pb);
272  avio_wb32(pb, track->entry); // entry count
273  for (i = 0; i < track->entry; i++) {
274  if (track->cluster[i].flags & flag) {
275  avio_wb32(pb, i + 1);
276  index++;
277  }
278  }
279  curpos = avio_tell(pb);
280  avio_seek(pb, entryPos, SEEK_SET);
281  avio_wb32(pb, index); // rewrite size
282  avio_seek(pb, curpos, SEEK_SET);
283  return update_size(pb, pos);
284 }
285 
286 /* Sample dependency atom */
287 static int mov_write_sdtp_tag(AVIOContext *pb, MOVTrack *track)
288 {
289  int i;
290  uint8_t leading, dependent, reference, redundancy;
291  int64_t pos = avio_tell(pb);
292  avio_wb32(pb, 0); // size
293  ffio_wfourcc(pb, "sdtp");
294  avio_wb32(pb, 0); // version & flags
295  for (i = 0; i < track->entry; i++) {
296  dependent = MOV_SAMPLE_DEPENDENCY_YES;
297  leading = reference = redundancy = MOV_SAMPLE_DEPENDENCY_UNKNOWN;
298  if (track->cluster[i].flags & MOV_DISPOSABLE_SAMPLE) {
299  reference = MOV_SAMPLE_DEPENDENCY_NO;
300  }
301  if (track->cluster[i].flags & MOV_SYNC_SAMPLE) {
302  dependent = MOV_SAMPLE_DEPENDENCY_NO;
303  }
304  avio_w8(pb, (leading << 6) | (dependent << 4) |
305  (reference << 2) | redundancy);
306  }
307  return update_size(pb, pos);
308 }
309 
310 static int mov_write_amr_tag(AVIOContext *pb, MOVTrack *track)
311 {
312  avio_wb32(pb, 0x11); /* size */
313  if (track->mode == MODE_MOV) ffio_wfourcc(pb, "samr");
314  else ffio_wfourcc(pb, "damr");
315  ffio_wfourcc(pb, "FFMP");
316  avio_w8(pb, 0); /* decoder version */
317 
318  avio_wb16(pb, 0x81FF); /* Mode set (all modes for AMR_NB) */
319  avio_w8(pb, 0x00); /* Mode change period (no restriction) */
320  avio_w8(pb, 0x01); /* Frames per sample */
321  return 0x11;
322 }
323 
324 static int mov_write_ac3_tag(AVFormatContext *s, AVIOContext *pb, MOVTrack *track)
325 {
326  GetBitContext gbc;
327  PutBitContext pbc;
328  uint8_t buf[3];
329  int fscod, bsid, bsmod, acmod, lfeon, frmsizecod;
330 
331  if (track->vos_len < 7) {
332  av_log(s, AV_LOG_ERROR,
333  "Cannot write moov atom before AC3 packets."
334  " Set the delay_moov flag to fix this.\n");
335  return AVERROR(EINVAL);
336  }
337 
338  avio_wb32(pb, 11);
339  ffio_wfourcc(pb, "dac3");
340 
341  init_get_bits(&gbc, track->vos_data + 4, (track->vos_len - 4) * 8);
342  fscod = get_bits(&gbc, 2);
343  frmsizecod = get_bits(&gbc, 6);
344  bsid = get_bits(&gbc, 5);
345  bsmod = get_bits(&gbc, 3);
346  acmod = get_bits(&gbc, 3);
347  if (acmod == 2) {
348  skip_bits(&gbc, 2); // dsurmod
349  } else {
350  if ((acmod & 1) && acmod != 1)
351  skip_bits(&gbc, 2); // cmixlev
352  if (acmod & 4)
353  skip_bits(&gbc, 2); // surmixlev
354  }
355  lfeon = get_bits1(&gbc);
356 
357  init_put_bits(&pbc, buf, sizeof(buf));
358  put_bits(&pbc, 2, fscod);
359  put_bits(&pbc, 5, bsid);
360  put_bits(&pbc, 3, bsmod);
361  put_bits(&pbc, 3, acmod);
362  put_bits(&pbc, 1, lfeon);
363  put_bits(&pbc, 5, frmsizecod >> 1); // bit_rate_code
364  put_bits(&pbc, 5, 0); // reserved
365 
366  flush_put_bits(&pbc);
367  avio_write(pb, buf, sizeof(buf));
368 
369  return 11;
370 }
371 
372 struct eac3_info {
373  AVPacket *pkt;
374  uint8_t ec3_done;
375  uint8_t num_blocks;
376 
377  /* Layout of the EC3SpecificBox */
378  /* maximum bitrate */
379  uint16_t data_rate;
380  /* number of independent substreams */
381  uint8_t num_ind_sub;
382  struct {
383  /* sample rate code (see ff_ac3_sample_rate_tab) 2 bits */
384  uint8_t fscod;
385  /* bit stream identification 5 bits */
386  uint8_t bsid;
387  /* one bit reserved */
388  /* audio service mixing (not supported yet) 1 bit */
389  /* bit stream mode 3 bits */
390  uint8_t bsmod;
391  /* audio coding mode 3 bits */
392  uint8_t acmod;
393  /* sub woofer on 1 bit */
394  uint8_t lfeon;
395  /* 3 bits reserved */
396  /* number of dependent substreams associated with this substream 4 bits */
397  uint8_t num_dep_sub;
398  /* channel locations of the dependent substream(s), if any, 9 bits */
399  uint16_t chan_loc;
400  /* if there is no dependent substream, then one bit reserved instead */
401  } substream[1]; /* TODO: support 8 independent substreams */
402 };
403 
404 #if CONFIG_AC3_PARSER
405 static int handle_eac3(MOVMuxContext *mov, AVPacket *pkt, MOVTrack *track)
406 {
407  AC3HeaderInfo *hdr = NULL;
408  struct eac3_info *info;
409  int num_blocks, ret;
410 
411  if (!track->eac3_priv && !(track->eac3_priv = av_mallocz(sizeof(*info))))
412  return AVERROR(ENOMEM);
413  info = track->eac3_priv;
414 
415  if (!info->pkt && !(info->pkt = av_packet_alloc()))
416  return AVERROR(ENOMEM);
417 
418  if (avpriv_ac3_parse_header(&hdr, pkt->data, pkt->size) < 0) {
419  /* drop the packets until we see a good one */
420  if (!track->entry) {
421  av_log(mov->fc, AV_LOG_WARNING, "Dropping invalid packet from start of the stream\n");
422  ret = 0;
423  } else
424  ret = AVERROR_INVALIDDATA;
425  goto end;
426  }
427 
428  info->data_rate = FFMAX(info->data_rate, hdr->bit_rate / 1000);
429  num_blocks = hdr->num_blocks;
430 
431  if (!info->ec3_done) {
432  /* AC-3 substream must be the first one */
433  if (hdr->bitstream_id <= 10 && hdr->substreamid != 0) {
434  ret = AVERROR(EINVAL);
435  goto end;
436  }
437 
438  /* this should always be the case, given that our AC-3 parser
439  * concatenates dependent frames to their independent parent */
440  if (hdr->frame_type == EAC3_FRAME_TYPE_INDEPENDENT) {
441  /* substream ids must be incremental */
442  if (hdr->substreamid > info->num_ind_sub + 1) {
443  ret = AVERROR(EINVAL);
444  goto end;
445  }
446 
447  if (hdr->substreamid == info->num_ind_sub + 1) {
448  //info->num_ind_sub++;
449  avpriv_request_sample(mov->fc, "Multiple independent substreams");
450  ret = AVERROR_PATCHWELCOME;
451  goto end;
452  } else if (hdr->substreamid < info->num_ind_sub ||
453  hdr->substreamid == 0 && info->substream[0].bsid) {
454  info->ec3_done = 1;
455  goto concatenate;
456  }
457  } else {
458  if (hdr->substreamid != 0) {
459  avpriv_request_sample(mov->fc, "Multiple non EAC3 independent substreams");
460  ret = AVERROR_PATCHWELCOME;
461  goto end;
462  }
463  }
464 
465  /* fill the info needed for the "dec3" atom */
466  info->substream[hdr->substreamid].fscod = hdr->sr_code;
467  info->substream[hdr->substreamid].bsid = hdr->bitstream_id;
468  info->substream[hdr->substreamid].bsmod = hdr->bitstream_mode;
469  info->substream[hdr->substreamid].acmod = hdr->channel_mode;
470  info->substream[hdr->substreamid].lfeon = hdr->lfe_on;
471 
472  /* Parse dependent substream(s), if any */
473  if (pkt->size != hdr->frame_size) {
474  int cumul_size = hdr->frame_size;
475  int parent = hdr->substreamid;
476 
477  while (cumul_size != pkt->size) {
478  GetBitContext gbc;
479  int i;
480  ret = avpriv_ac3_parse_header(&hdr, pkt->data + cumul_size, pkt->size - cumul_size);
481  if (ret < 0)
482  goto end;
483  if (hdr->frame_type != EAC3_FRAME_TYPE_DEPENDENT) {
484  ret = AVERROR(EINVAL);
485  goto end;
486  }
487  info->substream[parent].num_dep_sub++;
488  ret /= 8;
489 
490  /* header is parsed up to lfeon, but custom channel map may be needed */
491  init_get_bits8(&gbc, pkt->data + cumul_size + ret, pkt->size - cumul_size - ret);
492  /* skip bsid */
493  skip_bits(&gbc, 5);
494  /* skip volume control params */
495  for (i = 0; i < (hdr->channel_mode ? 1 : 2); i++) {
496  skip_bits(&gbc, 5); // skip dialog normalization
497  if (get_bits1(&gbc)) {
498  skip_bits(&gbc, 8); // skip compression gain word
499  }
500  }
501  /* get the dependent stream channel map, if exists */
502  if (get_bits1(&gbc))
503  info->substream[parent].chan_loc |= (get_bits(&gbc, 16) >> 5) & 0x1f;
504  else
505  info->substream[parent].chan_loc |= hdr->channel_mode;
506  cumul_size += hdr->frame_size;
507  }
508  }
509  }
510 
511 concatenate:
512  if (!info->num_blocks && num_blocks == 6) {
513  ret = pkt->size;
514  goto end;
515  }
516  else if (info->num_blocks + num_blocks > 6) {
517  ret = AVERROR_INVALIDDATA;
518  goto end;
519  }
520 
521  if (!info->num_blocks) {
522  ret = av_packet_ref(info->pkt, pkt);
523  if (!ret)
524  info->num_blocks = num_blocks;
525  goto end;
526  } else {
527  if ((ret = av_grow_packet(info->pkt, pkt->size)) < 0)
528  goto end;
529  memcpy(info->pkt->data + info->pkt->size - pkt->size, pkt->data, pkt->size);
530  info->num_blocks += num_blocks;
531  info->pkt->duration += pkt->duration;
532  if (info->num_blocks != 6)
533  goto end;
534  av_packet_unref(pkt);
535  av_packet_move_ref(pkt, info->pkt);
536  info->num_blocks = 0;
537  }
538  ret = pkt->size;
539 
540 end:
541  av_free(hdr);
542 
543  return ret;
544 }
545 #endif
546 
547 static int mov_write_eac3_tag(AVFormatContext *s, AVIOContext *pb, MOVTrack *track)
548 {
549  PutBitContext pbc;
550  uint8_t *buf;
551  struct eac3_info *info;
552  int size, i;
553 
554  if (!track->eac3_priv) {
555  av_log(s, AV_LOG_ERROR,
556  "Cannot write moov atom before EAC3 packets parsed.\n");
557  return AVERROR(EINVAL);
558  }
559 
560  info = track->eac3_priv;
561  size = 2 + ((34 * (info->num_ind_sub + 1) + 7) >> 3);
562  buf = av_malloc(size);
563  if (!buf) {
564  return AVERROR(ENOMEM);
565  }
566 
567  init_put_bits(&pbc, buf, size);
568  put_bits(&pbc, 13, info->data_rate);
569  put_bits(&pbc, 3, info->num_ind_sub);
570  for (i = 0; i <= info->num_ind_sub; i++) {
571  put_bits(&pbc, 2, info->substream[i].fscod);
572  put_bits(&pbc, 5, info->substream[i].bsid);
573  put_bits(&pbc, 1, 0); /* reserved */
574  put_bits(&pbc, 1, 0); /* asvc */
575  put_bits(&pbc, 3, info->substream[i].bsmod);
576  put_bits(&pbc, 3, info->substream[i].acmod);
577  put_bits(&pbc, 1, info->substream[i].lfeon);
578  put_bits(&pbc, 5, 0); /* reserved */
579  put_bits(&pbc, 4, info->substream[i].num_dep_sub);
580  if (!info->substream[i].num_dep_sub) {
581  put_bits(&pbc, 1, 0); /* reserved */
582  } else {
583  put_bits(&pbc, 9, info->substream[i].chan_loc);
584  }
585  }
586  flush_put_bits(&pbc);
587  size = put_bytes_output(&pbc);
588 
589  avio_wb32(pb, size + 8);
590  ffio_wfourcc(pb, "dec3");
591  avio_write(pb, buf, size);
592 
593  av_free(buf);
594 
595  return size;
596 }
597 
598 /**
599  * This function writes extradata "as is".
600  * Extradata must be formatted like a valid atom (with size and tag).
601  */
602 static int mov_write_extradata_tag(AVIOContext *pb, MOVTrack *track)
603 {
604  avio_write(pb, track->par->extradata, track->par->extradata_size);
605  return track->par->extradata_size;
606 }
607 
608 static int mov_write_enda_tag(AVIOContext *pb)
609 {
610  avio_wb32(pb, 10);
611  ffio_wfourcc(pb, "enda");
612  avio_wb16(pb, 1); /* little endian */
613  return 10;
614 }
615 
616 static int mov_write_enda_tag_be(AVIOContext *pb)
617 {
618  avio_wb32(pb, 10);
619  ffio_wfourcc(pb, "enda");
620  avio_wb16(pb, 0); /* big endian */
621  return 10;
622 }
623 
624 static void put_descr(AVIOContext *pb, int tag, unsigned int size)
625 {
626  int i = 3;
627  avio_w8(pb, tag);
628  for (; i > 0; i--)
629  avio_w8(pb, (size >> (7 * i)) | 0x80);
630  avio_w8(pb, size & 0x7F);
631 }
632 
633 static unsigned compute_avg_bitrate(MOVTrack *track)
634 {
635  uint64_t size = 0;
636  int i;
637  if (!track->track_duration)
638  return 0;
639  for (i = 0; i < track->entry; i++)
640  size += track->cluster[i].size;
641  return size * 8 * track->timescale / track->track_duration;
642 }
643 
644 struct mpeg4_bit_rate_values {
645  uint32_t buffer_size; ///< Size of the decoding buffer for the elementary stream in bytes.
646  uint32_t max_bit_rate; ///< Maximum rate in bits/second over any window of one second.
647  uint32_t avg_bit_rate; ///< Average rate in bits/second over the entire presentation.
648 };
649 
650 static struct mpeg4_bit_rate_values calculate_mpeg4_bit_rates(MOVTrack *track)
651 {
652  AVCPBProperties *props = track->st ?
653  (AVCPBProperties*)av_stream_get_side_data(track->st,
654  AV_PKT_DATA_CPB_PROPERTIES,
655  NULL) :
656  NULL;
657  struct mpeg4_bit_rate_values bit_rates = { 0 };
658 
659  bit_rates.avg_bit_rate = compute_avg_bitrate(track);
660  if (!bit_rates.avg_bit_rate) {
661  // if the average bit rate cannot be calculated at this point, such as
662  // in the case of fragmented MP4, utilize the following values as
663  // fall-back in priority order:
664  //
665  // 1. average bit rate property
666  // 2. bit rate (usually average over the whole clip)
667  // 3. maximum bit rate property
668 
669  if (props && props->avg_bitrate) {
670  bit_rates.avg_bit_rate = props->avg_bitrate;
671  } else if (track->par->bit_rate) {
672  bit_rates.avg_bit_rate = track->par->bit_rate;
673  } else if (props && props->max_bitrate) {
674  bit_rates.avg_bit_rate = props->max_bitrate;
675  }
676  }
677 
678  // (FIXME should be max rate in any 1 sec window)
679  bit_rates.max_bit_rate = FFMAX(track->par->bit_rate,
680  bit_rates.avg_bit_rate);
681 
682  // utilize values from properties if we have them available
683  if (props) {
684  bit_rates.max_bit_rate = FFMAX(bit_rates.max_bit_rate,
685  props->max_bitrate);
686  bit_rates.buffer_size = props->buffer_size / 8;
687  }
688 
689  return bit_rates;
690 }
691 
692 static int mov_write_esds_tag(AVIOContext *pb, MOVTrack *track) // Basic
693 {
694  struct mpeg4_bit_rate_values bit_rates = calculate_mpeg4_bit_rates(track);
695  int64_t pos = avio_tell(pb);
696  int decoder_specific_info_len = track->vos_len ? 5 + track->vos_len : 0;
697 
698  avio_wb32(pb, 0); // size
699  ffio_wfourcc(pb, "esds");
700  avio_wb32(pb, 0); // Version
701 
702  // ES descriptor
703  put_descr(pb, 0x03, 3 + 5+13 + decoder_specific_info_len + 5+1);
704  avio_wb16(pb, track->track_id);
705  avio_w8(pb, 0x00); // flags (= no flags)
706 
707  // DecoderConfig descriptor
708  put_descr(pb, 0x04, 13 + decoder_specific_info_len);
709 
710  // Object type indication
711  if ((track->par->codec_id == AV_CODEC_ID_MP2 ||
712  track->par->codec_id == AV_CODEC_ID_MP3) &&
713  track->par->sample_rate > 24000)
714  avio_w8(pb, 0x6B); // 11172-3
715  else
716  avio_w8(pb, ff_codec_get_tag(ff_mp4_obj_type, track->par->codec_id));
717 
718  // the following fields is made of 6 bits to identify the streamtype (4 for video, 5 for audio)
719  // plus 1 bit to indicate upstream and 1 bit set to 1 (reserved)
720  if (track->par->codec_id == AV_CODEC_ID_DVD_SUBTITLE)
721  avio_w8(pb, (0x38 << 2) | 1); // flags (= NeroSubpicStream)
722  else if (track->par->codec_type == AVMEDIA_TYPE_AUDIO)
723  avio_w8(pb, 0x15); // flags (= Audiostream)
724  else
725  avio_w8(pb, 0x11); // flags (= Visualstream)
726 
727  avio_wb24(pb, bit_rates.buffer_size); // Buffersize DB
728  avio_wb32(pb, bit_rates.max_bit_rate); // maxbitrate
729  avio_wb32(pb, bit_rates.avg_bit_rate);
730 
731  if (track->vos_len) {
732  // DecoderSpecific info descriptor
733  put_descr(pb, 0x05, track->vos_len);
734  avio_write(pb, track->vos_data, track->vos_len);
735  }
736 
737  // SL descriptor
738  put_descr(pb, 0x06, 1);
739  avio_w8(pb, 0x02);
740  return update_size(pb, pos);
741 }
742 
743 static int mov_pcm_le_gt16(enum AVCodecID codec_id)
744 {
745  return codec_id == AV_CODEC_ID_PCM_S24LE ||
746  codec_id == AV_CODEC_ID_PCM_S32LE ||
747  codec_id == AV_CODEC_ID_PCM_F32LE ||
748  codec_id == AV_CODEC_ID_PCM_F64LE;
749 }
750 
751 static int mov_pcm_be_gt16(enum AVCodecID codec_id)
752 {
753  return codec_id == AV_CODEC_ID_PCM_S24BE ||
754  codec_id == AV_CODEC_ID_PCM_S32BE ||
755  codec_id == AV_CODEC_ID_PCM_F32BE ||
756  codec_id == AV_CODEC_ID_PCM_F64BE;
757 }
758 
759 static int mov_write_ms_tag(AVFormatContext *s, AVIOContext *pb, MOVTrack *track)
760 {
761  int ret;
762  int64_t pos = avio_tell(pb);
763  avio_wb32(pb, 0);
764  avio_wl32(pb, track->tag); // store it byteswapped
765  track->par->codec_tag = av_bswap16(track->tag >> 16);
766  if ((ret = ff_put_wav_header(s, pb, track->par, 0)) < 0)
767  return ret;
768  return update_size(pb, pos);
769 }
770 
771 static int mov_write_wfex_tag(AVFormatContext *s, AVIOContext *pb, MOVTrack *track)
772 {
773  int ret;
774  int64_t pos = avio_tell(pb);
775  avio_wb32(pb, 0);
776  ffio_wfourcc(pb, "wfex");
777  if ((ret = ff_put_wav_header(s, pb, track->st->codecpar, FF_PUT_WAV_HEADER_FORCE_WAVEFORMATEX)) < 0)
778  return ret;
779  return update_size(pb, pos);
780 }
781 
782 static int mov_write_dfla_tag(AVIOContext *pb, MOVTrack *track)
783 {
784  int64_t pos = avio_tell(pb);
785  avio_wb32(pb, 0);
786  ffio_wfourcc(pb, "dfLa");
787  avio_w8(pb, 0); /* version */
788  avio_wb24(pb, 0); /* flags */
789 
790  /* Expect the encoder to pass a METADATA_BLOCK_TYPE_STREAMINFO. */
791  if (track->par->extradata_size != FLAC_STREAMINFO_SIZE)
792  return AVERROR_INVALIDDATA;
793 
794  /* TODO: Write other METADATA_BLOCK_TYPEs if the encoder makes them available. */
795  avio_w8(pb, 1 << 7 | FLAC_METADATA_TYPE_STREAMINFO); /* LastMetadataBlockFlag << 7 | BlockType */
796  avio_wb24(pb, track->par->extradata_size); /* Length */
797  avio_write(pb, track->par->extradata, track->par->extradata_size); /* BlockData[Length] */
798 
799  return update_size(pb, pos);
800 }
801 
802 static int mov_write_dops_tag(AVFormatContext *s, AVIOContext *pb, MOVTrack *track)
803 {
804  int64_t pos = avio_tell(pb);
805  int channels, channel_map;
806  avio_wb32(pb, 0);
807  ffio_wfourcc(pb, "dOps");
808  avio_w8(pb, 0); /* Version */
809  if (track->par->extradata_size < 19) {
810  av_log(s, AV_LOG_ERROR, "invalid extradata size\n");
811  return AVERROR_INVALIDDATA;
812  }
813  /* extradata contains an Ogg OpusHead, other than byte-ordering and
814  OpusHead's preceeding magic/version, OpusSpecificBox is currently
815  identical. */
816  channels = AV_RB8(track->par->extradata + 9);
817  channel_map = AV_RB8(track->par->extradata + 18);
818 
819  avio_w8(pb, channels); /* OuputChannelCount */
820  avio_wb16(pb, AV_RL16(track->par->extradata + 10)); /* PreSkip */
821  avio_wb32(pb, AV_RL32(track->par->extradata + 12)); /* InputSampleRate */
822  avio_wb16(pb, AV_RL16(track->par->extradata + 16)); /* OutputGain */
823  avio_w8(pb, channel_map); /* ChannelMappingFamily */
824  /* Write the rest of the header out without byte-swapping. */
825  if (channel_map) {
826  if (track->par->extradata_size < 21 + channels) {
827  av_log(s, AV_LOG_ERROR, "invalid extradata size\n");
828  return AVERROR_INVALIDDATA;
829  }
830  avio_write(pb, track->par->extradata + 19, 2 + channels); /* ChannelMappingTable */
831  }
832 
833  return update_size(pb, pos);
834 }
835 
836 static int mov_write_dmlp_tag(AVFormatContext *s, AVIOContext *pb, MOVTrack *track)
837 {
838  int64_t pos = avio_tell(pb);
839  int length;
840  avio_wb32(pb, 0);
841  ffio_wfourcc(pb, "dmlp");
842 
843  if (track->vos_len < 20) {
844  av_log(s, AV_LOG_ERROR,
845  "Cannot write moov atom before TrueHD packets."
846  " Set the delay_moov flag to fix this.\n");
847  return AVERROR(EINVAL);
848  }
849 
850  length = (AV_RB16(track->vos_data) & 0xFFF) * 2;
851  if (length < 20 || length > track->vos_len)
852  return AVERROR_INVALIDDATA;
853 
854  // Only TrueHD is supported
855  if (AV_RB32(track->vos_data + 4) != 0xF8726FBA)
856  return AVERROR_INVALIDDATA;
857 
858  avio_wb32(pb, AV_RB32(track->vos_data + 8)); /* format_info */
859  avio_wb16(pb, AV_RB16(track->vos_data + 18) << 1); /* peak_data_rate */
860  avio_wb32(pb, 0); /* reserved */
861 
862  return update_size(pb, pos);
863 }
864 
865 static int mov_write_chan_tag(AVFormatContext *s, AVIOContext *pb, MOVTrack *track)
866 {
867  uint32_t layout_tag, bitmap;
868  int64_t pos = avio_tell(pb);
869 
870  layout_tag = ff_mov_get_channel_layout_tag(track->par->codec_id,
871  track->par->channel_layout,
872  &bitmap);
873  if (!layout_tag) {
874  av_log(s, AV_LOG_WARNING, "not writing 'chan' tag due to "
875  "lack of channel information\n");
876  return 0;
877  }
878 
879  if (track->multichannel_as_mono)
880  return 0;
881 
882  avio_wb32(pb, 0); // Size
883  ffio_wfourcc(pb, "chan"); // Type
884  avio_w8(pb, 0); // Version
885  avio_wb24(pb, 0); // Flags
886  avio_wb32(pb, layout_tag); // mChannelLayoutTag
887  avio_wb32(pb, bitmap); // mChannelBitmap
888  avio_wb32(pb, 0); // mNumberChannelDescriptions
889 
890  return update_size(pb, pos);
891 }
892 
893 static int mov_write_wave_tag(AVFormatContext *s, AVIOContext *pb, MOVTrack *track)
894 {
895  int64_t pos = avio_tell(pb);
896 
897  avio_wb32(pb, 0); /* size */
898  ffio_wfourcc(pb, "wave");
899 
900  if (track->par->codec_id != AV_CODEC_ID_QDM2) {
901  avio_wb32(pb, 12); /* size */
902  ffio_wfourcc(pb, "frma");
903  avio_wl32(pb, track->tag);
904  }
905 
906  if (track->par->codec_id == AV_CODEC_ID_AAC) {
907  /* useless atom needed by mplayer, ipod, not needed by quicktime */
908  avio_wb32(pb, 12); /* size */
909  ffio_wfourcc(pb, "mp4a");
910  avio_wb32(pb, 0);
911  mov_write_esds_tag(pb, track);
912  } else if (mov_pcm_le_gt16(track->par->codec_id)) {
913  mov_write_enda_tag(pb);
914  } else if (mov_pcm_be_gt16(track->par->codec_id)) {
915  mov_write_enda_tag_be(pb);
916  } else if (track->par->codec_id == AV_CODEC_ID_AMR_NB) {
917  mov_write_amr_tag(pb, track);
918  } else if (track->par->codec_id == AV_CODEC_ID_AC3) {
919  mov_write_ac3_tag(s, pb, track);
920  } else if (track->par->codec_id == AV_CODEC_ID_EAC3) {
921  mov_write_eac3_tag(s, pb, track);
922  } else if (track->par->codec_id == AV_CODEC_ID_ALAC ||
923  track->par->codec_id == AV_CODEC_ID_QDM2) {
924  mov_write_extradata_tag(pb, track);
925  } else if (track->par->codec_id == AV_CODEC_ID_ADPCM_MS ||
926  track->par->codec_id == AV_CODEC_ID_ADPCM_IMA_WAV) {
927  mov_write_ms_tag(s, pb, track);
928  }
929 
930  avio_wb32(pb, 8); /* size */
931  avio_wb32(pb, 0); /* null tag */
932 
933  return update_size(pb, pos);
934 }
935 
936 static int mov_write_dvc1_structs(MOVTrack *track, uint8_t *buf)
937 {
938  uint8_t *unescaped;
939  const uint8_t *start, *next, *end = track->vos_data + track->vos_len;
940  int unescaped_size, seq_found = 0;
941  int level = 0, interlace = 0;
942  int packet_seq = track->vc1_info.packet_seq;
943  int packet_entry = track->vc1_info.packet_entry;
944  int slices = track->vc1_info.slices;
945  PutBitContext pbc;
946 
947  if (track->start_dts == AV_NOPTS_VALUE) {
948  /* No packets written yet, vc1_info isn't authoritative yet. */
949  /* Assume inline sequence and entry headers. */
950  packet_seq = packet_entry = 1;
951  av_log(NULL, AV_LOG_WARNING,
952  "moov atom written before any packets, unable to write correct "
953  "dvc1 atom. Set the delay_moov flag to fix this.\n");
954  }
955 
956  unescaped = av_mallocz(track->vos_len + AV_INPUT_BUFFER_PADDING_SIZE);
957  if (!unescaped)
958  return AVERROR(ENOMEM);
959  start = find_next_marker(track->vos_data, end);
960  for (next = start; next < end; start = next) {
961  GetBitContext gb;
962  int size;
963  next = find_next_marker(start + 4, end);
964  size = next - start - 4;
965  if (size <= 0)
966  continue;
967  unescaped_size = vc1_unescape_buffer(start + 4, size, unescaped);
968  init_get_bits(&gb, unescaped, 8 * unescaped_size);
969  if (AV_RB32(start) == VC1_CODE_SEQHDR) {
970  int profile = get_bits(&gb, 2);
971  if (profile != PROFILE_ADVANCED) {
972  av_free(unescaped);
973  return AVERROR(ENOSYS);
974  }
975  seq_found = 1;
976  level = get_bits(&gb, 3);
977  /* chromaformat, frmrtq_postproc, bitrtq_postproc, postprocflag,
978  * width, height */
979  skip_bits_long(&gb, 2 + 3 + 5 + 1 + 2*12);
980  skip_bits(&gb, 1); /* broadcast */
981  interlace = get_bits1(&gb);
982  skip_bits(&gb, 4); /* tfcntrflag, finterpflag, reserved, psf */
983  }
984  }
985  if (!seq_found) {
986  av_free(unescaped);
987  return AVERROR(ENOSYS);
988  }
989 
990  init_put_bits(&pbc, buf, 7);
991  /* VC1DecSpecStruc */
992  put_bits(&pbc, 4, 12); /* profile - advanced */
993  put_bits(&pbc, 3, level);
994  put_bits(&pbc, 1, 0); /* reserved */
995  /* VC1AdvDecSpecStruc */
996  put_bits(&pbc, 3, level);
997  put_bits(&pbc, 1, 0); /* cbr */
998  put_bits(&pbc, 6, 0); /* reserved */
999  put_bits(&pbc, 1, !interlace); /* no interlace */
1000  put_bits(&pbc, 1, !packet_seq); /* no multiple seq */
1001  put_bits(&pbc, 1, !packet_entry); /* no multiple entry */
1002  put_bits(&pbc, 1, !slices); /* no slice code */
1003  put_bits(&pbc, 1, 0); /* no bframe */
1004  put_bits(&pbc, 1, 0); /* reserved */
1005 
1006  /* framerate */
1007  if (track->st->avg_frame_rate.num > 0 && track->st->avg_frame_rate.den > 0)
1008  put_bits32(&pbc, track->st->avg_frame_rate.num / track->st->avg_frame_rate.den);
1009  else
1010  put_bits32(&pbc, 0xffffffff);
1011 
1012  flush_put_bits(&pbc);
1013 
1014  av_free(unescaped);
1015 
1016  return 0;
1017 }
1018 
1019 static int mov_write_dvc1_tag(AVIOContext *pb, MOVTrack *track)
1020 {
1021  uint8_t buf[7] = { 0 };
1022  int ret;
1023 
1024  if ((ret = mov_write_dvc1_structs(track, buf)) < 0)
1025  return ret;
1026 
1027  avio_wb32(pb, track->vos_len + 8 + sizeof(buf));
1028  ffio_wfourcc(pb, "dvc1");
1029  avio_write(pb, buf, sizeof(buf));
1030  avio_write(pb, track->vos_data, track->vos_len);
1031 
1032  return 0;
1033 }
1034 
1035 static int mov_write_glbl_tag(AVIOContext *pb, MOVTrack *track)
1036 {
1037  avio_wb32(pb, track->vos_len + 8);
1038  ffio_wfourcc(pb, "glbl");
1039  avio_write(pb, track->vos_data, track->vos_len);
1040  return 8 + track->vos_len;
1041 }
1042 
1043 /**
1044  * Compute flags for 'lpcm' tag.
1045  * See CoreAudioTypes and AudioStreamBasicDescription at Apple.
1046  */
1047 static int mov_get_lpcm_flags(enum AVCodecID codec_id)
1048 {
1049  switch (codec_id) {
1050  case AV_CODEC_ID_PCM_F32BE:
1051  case AV_CODEC_ID_PCM_F64BE:
1052  return 11;
1053  case AV_CODEC_ID_PCM_F32LE:
1054  case AV_CODEC_ID_PCM_F64LE:
1055  return 9;
1056  case AV_CODEC_ID_PCM_U8:
1057  return 10;
1058  case AV_CODEC_ID_PCM_S16BE:
1059  case AV_CODEC_ID_PCM_S24BE:
1060  case AV_CODEC_ID_PCM_S32BE:
1061  return 14;
1062  case AV_CODEC_ID_PCM_S8:
1063  case AV_CODEC_ID_PCM_S16LE:
1064  case AV_CODEC_ID_PCM_S24LE:
1065  case AV_CODEC_ID_PCM_S32LE:
1066  return 12;
1067  default:
1068  return 0;
1069  }
1070 }
1071 
1072 static int get_cluster_duration(MOVTrack *track, int cluster_idx)
1073 {
1074  int64_t next_dts;
1075 
1076  if (cluster_idx >= track->entry)
1077  return 0;
1078 
1079  if (cluster_idx + 1 == track->entry)
1080  next_dts = track->track_duration + track->start_dts;
1081  else
1082  next_dts = track->cluster[cluster_idx + 1].dts;
1083 
1084  next_dts -= track->cluster[cluster_idx].dts;
1085 
1086  av_assert0(next_dts >= 0);
1087  av_assert0(next_dts <= INT_MAX);
1088 
1089  return next_dts;
1090 }
1091 
1092 static int get_samples_per_packet(MOVTrack *track)
1093 {
1094  int i, first_duration;
1095 
1096 // return track->par->frame_size;
1097 
1098  /* use 1 for raw PCM */
1099  if (!track->audio_vbr)
1100  return 1;
1101 
1102  /* check to see if duration is constant for all clusters */
1103  if (!track->entry)
1104  return 0;
1105  first_duration = get_cluster_duration(track, 0);
1106  for (i = 1; i < track->entry; i++) {
1107  if (get_cluster_duration(track, i) != first_duration)
1108  return 0;
1109  }
1110  return first_duration;
1111 }
1112 
1113 static int mov_write_btrt_tag(AVIOContext *pb, MOVTrack *track)
1114 {
1115  int64_t pos = avio_tell(pb);
1116  struct mpeg4_bit_rate_values bit_rates = calculate_mpeg4_bit_rates(track);
1117  if (!bit_rates.max_bit_rate && !bit_rates.avg_bit_rate &&
1118  !bit_rates.buffer_size)
1119  // no useful data to be written, skip
1120  return 0;
1121 
1122  avio_wb32(pb, 0); /* size */
1123  ffio_wfourcc(pb, "btrt");
1124 
1125  avio_wb32(pb, bit_rates.buffer_size);
1126  avio_wb32(pb, bit_rates.max_bit_rate);
1127  avio_wb32(pb, bit_rates.avg_bit_rate);
1128 
1129  return update_size(pb, pos);
1130 }
1131 
1132 static int mov_write_audio_tag(AVFormatContext *s, AVIOContext *pb, MOVMuxContext *mov, MOVTrack *track)
1133 {
1134  int64_t pos = avio_tell(pb);
1135  int version = 0;
1136  uint32_t tag = track->tag;
1137  int ret = 0;
1138 
1139  if (track->mode == MODE_MOV) {
1140  if (track->timescale > UINT16_MAX || !track->par->channels) {
1141  if (mov_get_lpcm_flags(track->par->codec_id))
1142  tag = AV_RL32("lpcm");
1143  version = 2;
1144  } else if (track->audio_vbr || mov_pcm_le_gt16(track->par->codec_id) ||
1145  mov_pcm_be_gt16(track->par->codec_id) ||
1146  track->par->codec_id == AV_CODEC_ID_ADPCM_MS ||
1147  track->par->codec_id == AV_CODEC_ID_ADPCM_IMA_WAV ||
1148  track->par->codec_id == AV_CODEC_ID_QDM2) {
1149  version = 1;
1150  }
1151  }
1152 
1153  avio_wb32(pb, 0); /* size */
1154  if (mov->encryption_scheme != MOV_ENC_NONE) {
1155  ffio_wfourcc(pb, "enca");
1156  } else {
1157  avio_wl32(pb, tag); // store it byteswapped
1158  }
1159  avio_wb32(pb, 0); /* Reserved */
1160  avio_wb16(pb, 0); /* Reserved */
1161  avio_wb16(pb, 1); /* Data-reference index, XXX == 1 */
1162 
1163  /* SoundDescription */
1164  avio_wb16(pb, version); /* Version */
1165  avio_wb16(pb, 0); /* Revision level */
1166  avio_wb32(pb, 0); /* Reserved */
1167 
1168  if (version == 2) {
1169  avio_wb16(pb, 3);
1170  avio_wb16(pb, 16);
1171  avio_wb16(pb, 0xfffe);
1172  avio_wb16(pb, 0);
1173  avio_wb32(pb, 0x00010000);
1174  avio_wb32(pb, 72);
1175  avio_wb64(pb, av_double2int(track->par->sample_rate));
1176  avio_wb32(pb, track->par->channels);
1177  avio_wb32(pb, 0x7F000000);
1178  avio_wb32(pb, av_get_bits_per_sample(track->par->codec_id));
1179  avio_wb32(pb, mov_get_lpcm_flags(track->par->codec_id));
1180  avio_wb32(pb, track->sample_size);
1181  avio_wb32(pb, get_samples_per_packet(track));
1182  } else {
1183  if (track->mode == MODE_MOV) {
1184  avio_wb16(pb, track->par->channels);
1185  if (track->par->codec_id == AV_CODEC_ID_PCM_U8 ||
1186  track->par->codec_id == AV_CODEC_ID_PCM_S8)
1187  avio_wb16(pb, 8); /* bits per sample */
1188  else if (track->par->codec_id == AV_CODEC_ID_ADPCM_G726)
1189  avio_wb16(pb, track->par->bits_per_coded_sample);
1190  else
1191  avio_wb16(pb, 16);
1192  avio_wb16(pb, track->audio_vbr ? -2 : 0); /* compression ID */
1193  } else { /* reserved for mp4/3gp */
1194  if (track->par->codec_id == AV_CODEC_ID_FLAC ||
1195  track->par->codec_id == AV_CODEC_ID_ALAC ||
1196  track->par->codec_id == AV_CODEC_ID_OPUS) {
1197  avio_wb16(pb, track->par->channels);
1198  } else {
1199  avio_wb16(pb, 2);
1200  }
1201  if (track->par->codec_id == AV_CODEC_ID_FLAC ||
1202  track->par->codec_id == AV_CODEC_ID_ALAC) {
1203  avio_wb16(pb, track->par->bits_per_raw_sample);
1204  } else {
1205  avio_wb16(pb, 16);
1206  }
1207  avio_wb16(pb, 0);
1208  }
1209 
1210  avio_wb16(pb, 0); /* packet size (= 0) */
1211  if (track->par->codec_id == AV_CODEC_ID_OPUS)
1212  avio_wb16(pb, 48000);
1213  else if (track->par->codec_id == AV_CODEC_ID_TRUEHD)
1214  avio_wb32(pb, track->par->sample_rate);
1215  else
1216  avio_wb16(pb, track->par->sample_rate <= UINT16_MAX ?
1217  track->par->sample_rate : 0);
1218 
1219  if (track->par->codec_id != AV_CODEC_ID_TRUEHD)
1220  avio_wb16(pb, 0); /* Reserved */
1221  }
1222 
1223  if (version == 1) { /* SoundDescription V1 extended info */
1224  if (mov_pcm_le_gt16(track->par->codec_id) ||
1225  mov_pcm_be_gt16(track->par->codec_id))
1226  avio_wb32(pb, 1); /* must be 1 for uncompressed formats */
1227  else
1228  avio_wb32(pb, track->par->frame_size); /* Samples per packet */
1229  avio_wb32(pb, track->sample_size / track->par->channels); /* Bytes per packet */
1230  avio_wb32(pb, track->sample_size); /* Bytes per frame */
1231  avio_wb32(pb, 2); /* Bytes per sample */
1232  }
1233 
1234  if (track->mode == MODE_MOV &&
1235  (track->par->codec_id == AV_CODEC_ID_AAC ||
1236  track->par->codec_id == AV_CODEC_ID_AC3 ||
1237  track->par->codec_id == AV_CODEC_ID_EAC3 ||
1238  track->par->codec_id == AV_CODEC_ID_AMR_NB ||
1239  track->par->codec_id == AV_CODEC_ID_ALAC ||
1240  track->par->codec_id == AV_CODEC_ID_ADPCM_MS ||
1241  track->par->codec_id == AV_CODEC_ID_ADPCM_IMA_WAV ||
1242  track->par->codec_id == AV_CODEC_ID_QDM2 ||
1243  (mov_pcm_le_gt16(track->par->codec_id) && version==1) ||
1244  (mov_pcm_be_gt16(track->par->codec_id) && version==1)))
1245  ret = mov_write_wave_tag(s, pb, track);
1246  else if (track->tag == MKTAG('m','p','4','a'))
1247  ret = mov_write_esds_tag(pb, track);
1248  else if (track->par->codec_id == AV_CODEC_ID_AMR_NB)
1249  ret = mov_write_amr_tag(pb, track);
1250  else if (track->par->codec_id == AV_CODEC_ID_AC3)
1251  ret = mov_write_ac3_tag(s, pb, track);
1252  else if (track->par->codec_id == AV_CODEC_ID_EAC3)
1253  ret = mov_write_eac3_tag(s, pb, track);
1254  else if (track->par->codec_id == AV_CODEC_ID_ALAC)
1255  ret = mov_write_extradata_tag(pb, track);
1256  else if (track->par->codec_id == AV_CODEC_ID_WMAPRO)
1257  ret = mov_write_wfex_tag(s, pb, track);
1258  else if (track->par->codec_id == AV_CODEC_ID_FLAC)
1259  ret = mov_write_dfla_tag(pb, track);
1260  else if (track->par->codec_id == AV_CODEC_ID_OPUS)
1261  ret = mov_write_dops_tag(s, pb, track);
1262  else if (track->par->codec_id == AV_CODEC_ID_TRUEHD)
1263  ret = mov_write_dmlp_tag(s, pb, track);
1264  else if (track->vos_len > 0)
1265  ret = mov_write_glbl_tag(pb, track);
1266 
1267  if (ret < 0)
1268  return ret;
1269 
1270  if (track->mode == MODE_MOV && track->par->codec_type == AVMEDIA_TYPE_AUDIO
1271  && ((ret = mov_write_chan_tag(s, pb, track)) < 0)) {
1272  return ret;
1273  }
1274 
1275  if (mov->encryption_scheme != MOV_ENC_NONE
1276  && ((ret = ff_mov_cenc_write_sinf_tag(track, pb, mov->encryption_kid)) < 0)) {
1277  return ret;
1278  }
1279 
1280  if (track->mode == MODE_MP4 &&
1281  ((ret = mov_write_btrt_tag(pb, track)) < 0))
1282  return ret;
1283 
1284  ret = update_size(pb, pos);
1285  return ret;
1286 }
1287 
1288 static int mov_write_d263_tag(AVIOContext *pb)
1289 {
1290  avio_wb32(pb, 0xf); /* size */
1291  ffio_wfourcc(pb, "d263");
1292  ffio_wfourcc(pb, "FFMP");
1293  avio_w8(pb, 0); /* decoder version */
1294  /* FIXME use AVCodecContext level/profile, when encoder will set values */
1295  avio_w8(pb, 0xa); /* level */
1296  avio_w8(pb, 0); /* profile */
1297  return 0xf;
1298 }
1299 
1300 static int mov_write_av1c_tag(AVIOContext *pb, MOVTrack *track)
1301 {
1302  int64_t pos = avio_tell(pb);
1303 
1304  avio_wb32(pb, 0);
1305  ffio_wfourcc(pb, "av1C");
1306  ff_isom_write_av1c(pb, track->vos_data, track->vos_len);
1307  return update_size(pb, pos);
1308 }
1309 
1310 static int mov_write_avcc_tag(AVIOContext *pb, MOVTrack *track)
1311 {
1312  int64_t pos = avio_tell(pb);
1313 
1314  avio_wb32(pb, 0);
1315  ffio_wfourcc(pb, "avcC");
1316  ff_isom_write_avcc(pb, track->vos_data, track->vos_len);
1317  return update_size(pb, pos);
1318 }
1319 
1320 static int mov_write_vpcc_tag(AVFormatContext *s, AVIOContext *pb, MOVTrack *track)
1321 {
1322  int64_t pos = avio_tell(pb);
1323 
1324  avio_wb32(pb, 0);
1325  ffio_wfourcc(pb, "vpcC");
1326  avio_w8(pb, 1); /* version */
1327  avio_wb24(pb, 0); /* flags */
1328  ff_isom_write_vpcc(s, pb, track->par);
1329  return update_size(pb, pos);
1330 }
1331 
1332 static int mov_write_hvcc_tag(AVIOContext *pb, MOVTrack *track)
1333 {
1334  int64_t pos = avio_tell(pb);
1335 
1336  avio_wb32(pb, 0);
1337  ffio_wfourcc(pb, "hvcC");
1338  if (track->tag == MKTAG('h','v','c','1'))
1339  ff_isom_write_hvcc(pb, track->vos_data, track->vos_len, 1);
1340  else
1341  ff_isom_write_hvcc(pb, track->vos_data, track->vos_len, 0);
1342  return update_size(pb, pos);
1343 }
1344 
1345 /* also used by all avid codecs (dv, imx, meridien) and their variants */
1346 static int mov_write_avid_tag(AVIOContext *pb, MOVTrack *track)
1347 {
1348  int interlaced;
1349  int cid;
1350  int display_width = track->par->width;
1351 
1352  if (track->vos_data && track->vos_len > 0x29) {
1353  if (ff_dnxhd_parse_header_prefix(track->vos_data) != 0) {
1354  /* looks like a DNxHD bit stream */
1355  interlaced = (track->vos_data[5] & 2);
1356  cid = AV_RB32(track->vos_data + 0x28);
1357  } else {
1358  av_log(NULL, AV_LOG_WARNING, "Could not locate DNxHD bit stream in vos_data\n");
1359  return 0;
1360  }
1361  } else {
1362  av_log(NULL, AV_LOG_WARNING, "Could not locate DNxHD bit stream, vos_data too small\n");
1363  return 0;
1364  }
1365 
1366  avio_wb32(pb, 24); /* size */
1367  ffio_wfourcc(pb, "ACLR");
1368  ffio_wfourcc(pb, "ACLR");
1369  ffio_wfourcc(pb, "0001");
1370  if (track->par->color_range == AVCOL_RANGE_MPEG || /* Legal range (16-235) */
1371  track->par->color_range == AVCOL_RANGE_UNSPECIFIED) {
1372  avio_wb32(pb, 1); /* Corresponds to 709 in official encoder */
1373  } else { /* Full range (0-255) */
1374  avio_wb32(pb, 2); /* Corresponds to RGB in official encoder */
1375  }
1376  avio_wb32(pb, 0); /* unknown */
1377 
1378  if (track->tag == MKTAG('A','V','d','h')) {
1379  avio_wb32(pb, 32);
1380  ffio_wfourcc(pb, "ADHR");
1381  ffio_wfourcc(pb, "0001");
1382  avio_wb32(pb, cid);
1383  avio_wb32(pb, 0); /* unknown */
1384  avio_wb32(pb, 1); /* unknown */
1385  avio_wb32(pb, 0); /* unknown */
1386  avio_wb32(pb, 0); /* unknown */
1387  return 0;
1388  }
1389 
1390  avio_wb32(pb, 24); /* size */
1391  ffio_wfourcc(pb, "APRG");
1392  ffio_wfourcc(pb, "APRG");
1393  ffio_wfourcc(pb, "0001");
1394  avio_wb32(pb, 1); /* unknown */
1395  avio_wb32(pb, 0); /* unknown */
1396 
1397  avio_wb32(pb, 120); /* size */
1398  ffio_wfourcc(pb, "ARES");
1399  ffio_wfourcc(pb, "ARES");
1400  ffio_wfourcc(pb, "0001");
1401  avio_wb32(pb, cid); /* dnxhd cid, some id ? */
1402  if ( track->par->sample_aspect_ratio.num > 0
1403  && track->par->sample_aspect_ratio.den > 0)
1404  display_width = display_width * track->par->sample_aspect_ratio.num / track->par->sample_aspect_ratio.den;
1405  avio_wb32(pb, display_width);
1406  /* values below are based on samples created with quicktime and avid codecs */
1407  if (interlaced) {
1408  avio_wb32(pb, track->par->height / 2);
1409  avio_wb32(pb, 2); /* unknown */
1410  avio_wb32(pb, 0); /* unknown */
1411  avio_wb32(pb, 4); /* unknown */
1412  } else {
1413  avio_wb32(pb, track->par->height);
1414  avio_wb32(pb, 1); /* unknown */
1415  avio_wb32(pb, 0); /* unknown */
1416  if (track->par->height == 1080)
1417  avio_wb32(pb, 5); /* unknown */
1418  else
1419  avio_wb32(pb, 6); /* unknown */
1420  }
1421  /* padding */
1422  ffio_fill(pb, 0, 10 * 8);
1423 
1424  return 0;
1425 }
1426 
1427 static int mov_write_dpxe_tag(AVIOContext *pb, MOVTrack *track)
1428 {
1429  avio_wb32(pb, 12);
1430  ffio_wfourcc(pb, "DpxE");
1431  if (track->par->extradata_size >= 12 &&
1432  !memcmp(&track->par->extradata[4], "DpxE", 4)) {
1433  avio_wb32(pb, track->par->extradata[11]);
1434  } else {
1435  avio_wb32(pb, 1);
1436  }
1437  return 0;
1438 }
1439 
1440 static int mov_get_dv_codec_tag(AVFormatContext *s, MOVTrack *track)
1441 {
1442  int tag;
1443 
1444  if (track->par->width == 720) { /* SD */
1445  if (track->par->height == 480) { /* NTSC */
1446  if (track->par->format == AV_PIX_FMT_YUV422P) tag = MKTAG('d','v','5','n');
1447  else tag = MKTAG('d','v','c',' ');
1448  }else if (track->par->format == AV_PIX_FMT_YUV422P) tag = MKTAG('d','v','5','p');
1449  else if (track->par->format == AV_PIX_FMT_YUV420P) tag = MKTAG('d','v','c','p');
1450  else tag = MKTAG('d','v','p','p');
1451  } else if (track->par->height == 720) { /* HD 720 line */
1452  if (track->st->time_base.den == 50) tag = MKTAG('d','v','h','q');
1453  else tag = MKTAG('d','v','h','p');
1454  } else if (track->par->height == 1080) { /* HD 1080 line */
1455  if (track->st->time_base.den == 25) tag = MKTAG('d','v','h','5');
1456  else tag = MKTAG('d','v','h','6');
1457  } else {
1458  av_log(s, AV_LOG_ERROR, "unsupported height for dv codec\n");
1459  return 0;
1460  }
1461 
1462  return tag;
1463 }
1464 
1465 static int defined_frame_rate(AVFormatContext *s, AVStream *st)
1466 {
1467  AVRational rational_framerate = st->avg_frame_rate;
1468  int rate = 0;
1469  if (rational_framerate.den != 0)
1470  rate = av_q2d(rational_framerate);
1471  return rate;
1472 }
1473 
1474 static int mov_get_mpeg2_xdcam_codec_tag(AVFormatContext *s, MOVTrack *track)
1475 {
1476  int tag = track->par->codec_tag;
1477  int interlaced = track->par->field_order > AV_FIELD_PROGRESSIVE;
1478  AVStream *st = track->st;
1479  int rate = defined_frame_rate(s, st);
1480 
1481  if (!tag)
1482  tag = MKTAG('m', '2', 'v', '1'); //fallback tag
1483 
1484  if (track->par->format == AV_PIX_FMT_YUV420P) {
1485  if (track->par->width == 1280 && track->par->height == 720) {
1486  if (!interlaced) {
1487  if (rate == 24) tag = MKTAG('x','d','v','4');
1488  else if (rate == 25) tag = MKTAG('x','d','v','5');
1489  else if (rate == 30) tag = MKTAG('x','d','v','1');
1490  else if (rate == 50) tag = MKTAG('x','d','v','a');
1491  else if (rate == 60) tag = MKTAG('x','d','v','9');
1492  }
1493  } else if (track->par->width == 1440 && track->par->height == 1080) {
1494  if (!interlaced) {
1495  if (rate == 24) tag = MKTAG('x','d','v','6');
1496  else if (rate == 25) tag = MKTAG('x','d','v','7');
1497  else if (rate == 30) tag = MKTAG('x','d','v','8');
1498  } else {
1499  if (rate == 25) tag = MKTAG('x','d','v','3');
1500  else if (rate == 30) tag = MKTAG('x','d','v','2');
1501  }
1502  } else if (track->par->width == 1920 && track->par->height == 1080) {
1503  if (!interlaced) {
1504  if (rate == 24) tag = MKTAG('x','d','v','d');
1505  else if (rate == 25) tag = MKTAG('x','d','v','e');
1506  else if (rate == 30) tag = MKTAG('x','d','v','f');
1507  } else {
1508  if (rate == 25) tag = MKTAG('x','d','v','c');
1509  else if (rate == 30) tag = MKTAG('x','d','v','b');
1510  }
1511  }
1512  } else if (track->par->format == AV_PIX_FMT_YUV422P) {
1513  if (track->par->width == 1280 && track->par->height == 720) {
1514  if (!interlaced) {
1515  if (rate == 24) tag = MKTAG('x','d','5','4');
1516  else if (rate == 25) tag = MKTAG('x','d','5','5');
1517  else if (rate == 30) tag = MKTAG('x','d','5','1');
1518  else if (rate == 50) tag = MKTAG('x','d','5','a');
1519  else if (rate == 60) tag = MKTAG('x','d','5','9');
1520  }
1521  } else if (track->par->width == 1920 && track->par->height == 1080) {
1522  if (!interlaced) {
1523  if (rate == 24) tag = MKTAG('x','d','5','d');
1524  else if (rate == 25) tag = MKTAG('x','d','5','e');
1525  else if (rate == 30) tag = MKTAG('x','d','5','f');
1526  } else {
1527  if (rate == 25) tag = MKTAG('x','d','5','c');
1528  else if (rate == 30) tag = MKTAG('x','d','5','b');
1529  }
1530  }
1531  }
1532 
1533  return tag;
1534 }
1535 
1536 static int mov_get_h264_codec_tag(AVFormatContext *s, MOVTrack *track)
1537 {
1538  int tag = track->par->codec_tag;
1539  int interlaced = track->par->field_order > AV_FIELD_PROGRESSIVE;
1540  AVStream *st = track->st;
1541  int rate = defined_frame_rate(s, st);
1542 
1543  if (!tag)
1544  tag = MKTAG('a', 'v', 'c', 'i'); //fallback tag
1545 
1546  if (track->par->format == AV_PIX_FMT_YUV420P10) {
1547  if (track->par->width == 960 && track->par->height == 720) {
1548  if (!interlaced) {
1549  if (rate == 24) tag = MKTAG('a','i','5','p');
1550  else if (rate == 25) tag = MKTAG('a','i','5','q');
1551  else if (rate == 30) tag = MKTAG('a','i','5','p');
1552  else if (rate == 50) tag = MKTAG('a','i','5','q');
1553  else if (rate == 60) tag = MKTAG('a','i','5','p');
1554  }
1555  } else if (track->par->width == 1440 && track->par->height == 1080) {
1556  if (!interlaced) {
1557  if (rate == 24) tag = MKTAG('a','i','5','3');
1558  else if (rate == 25) tag = MKTAG('a','i','5','2');
1559  else if (rate == 30) tag = MKTAG('a','i','5','3');
1560  } else {
1561  if (rate == 50) tag = MKTAG('a','i','5','5');
1562  else if (rate == 60) tag = MKTAG('a','i','5','6');
1563  }
1564  }
1565  } else if (track->par->format == AV_PIX_FMT_YUV422P10) {
1566  if (track->par->width == 1280 && track->par->height == 720) {
1567  if (!interlaced) {
1568  if (rate == 24) tag = MKTAG('a','i','1','p');
1569  else if (rate == 25) tag = MKTAG('a','i','1','q');
1570  else if (rate == 30) tag = MKTAG('a','i','1','p');
1571  else if (rate == 50) tag = MKTAG('a','i','1','q');
1572  else if (rate == 60) tag = MKTAG('a','i','1','p');
1573  }
1574  } else if (track->par->width == 1920 && track->par->height == 1080) {
1575  if (!interlaced) {
1576  if (rate == 24) tag = MKTAG('a','i','1','3');
1577  else if (rate == 25) tag = MKTAG('a','i','1','2');
1578  else if (rate == 30) tag = MKTAG('a','i','1','3');
1579  } else {
1580  if (rate == 25) tag = MKTAG('a','i','1','5');
1581  else if (rate == 50) tag = MKTAG('a','i','1','5');
1582  else if (rate == 60) tag = MKTAG('a','i','1','6');
1583  }
1584  } else if ( track->par->width == 4096 && track->par->height == 2160
1585  || track->par->width == 3840 && track->par->height == 2160
1586  || track->par->width == 2048 && track->par->height == 1080) {
1587  tag = MKTAG('a','i','v','x');
1588  }
1589  }
1590 
1591  return tag;
1592 }
1593 
1594 static const struct {
1595  enum AVPixelFormat pix_fmt;
1596  uint32_t tag;
1597  unsigned bps;
1598 } mov_pix_fmt_tags[] = {
1599  { AV_PIX_FMT_YUYV422, MKTAG('y','u','v','2'), 0 },
1600  { AV_PIX_FMT_YUYV422, MKTAG('y','u','v','s'), 0 },
1601  { AV_PIX_FMT_UYVY422, MKTAG('2','v','u','y'), 0 },
1602  { AV_PIX_FMT_RGB555BE,MKTAG('r','a','w',' '), 16 },
1603  { AV_PIX_FMT_RGB555LE,MKTAG('L','5','5','5'), 16 },
1604  { AV_PIX_FMT_RGB565LE,MKTAG('L','5','6','5'), 16 },
1605  { AV_PIX_FMT_RGB565BE,MKTAG('B','5','6','5'), 16 },
1606  { AV_PIX_FMT_GRAY16BE,MKTAG('b','1','6','g'), 16 },
1607  { AV_PIX_FMT_RGB24, MKTAG('r','a','w',' '), 24 },
1608  { AV_PIX_FMT_BGR24, MKTAG('2','4','B','G'), 24 },
1609  { AV_PIX_FMT_ARGB, MKTAG('r','a','w',' '), 32 },
1610  { AV_PIX_FMT_BGRA, MKTAG('B','G','R','A'), 32 },
1611  { AV_PIX_FMT_RGBA, MKTAG('R','G','B','A'), 32 },
1612  { AV_PIX_FMT_ABGR, MKTAG('A','B','G','R'), 32 },
1613  { AV_PIX_FMT_RGB48BE, MKTAG('b','4','8','r'), 48 },
1614 };
1615 
1616 static int mov_get_dnxhd_codec_tag(AVFormatContext *s, MOVTrack *track)
1617 {
1618  int tag = MKTAG('A','V','d','n');
1619  if (track->par->profile != FF_PROFILE_UNKNOWN &&
1620  track->par->profile != FF_PROFILE_DNXHD)
1621  tag = MKTAG('A','V','d','h');
1622  return tag;
1623 }
1624 
1625 static int mov_get_rawvideo_codec_tag(AVFormatContext *s, MOVTrack *track)
1626 {
1627  int tag = track->par->codec_tag;
1628  int i;
1629  enum AVPixelFormat pix_fmt;
1630 
1631  for (i = 0; i < FF_ARRAY_ELEMS(mov_pix_fmt_tags); i++) {
1632  if (track->par->format == mov_pix_fmt_tags[i].pix_fmt) {
1633  tag = mov_pix_fmt_tags[i].tag;
1634  track->par->bits_per_coded_sample = mov_pix_fmt_tags[i].bps;
1635  if (track->par->codec_tag == mov_pix_fmt_tags[i].tag)
1636  break;
1637  }
1638  }
1639 
1640  pix_fmt = avpriv_pix_fmt_find(PIX_FMT_LIST_MOV,
1641  track->par->bits_per_coded_sample);
1642  if (tag == MKTAG('r','a','w',' ') &&
1643  track->par->format != pix_fmt &&
1644  track->par->format != AV_PIX_FMT_GRAY8 &&
1645  track->par->format != AV_PIX_FMT_NONE)
1646  av_log(s, AV_LOG_ERROR, "%s rawvideo cannot be written to mov, output file will be unreadable\n",
1647  av_get_pix_fmt_name(track->par->format));
1648  return tag;
1649 }
1650 
1651 static unsigned int mov_get_codec_tag(AVFormatContext *s, MOVTrack *track)
1652 {
1653  unsigned int tag = track->par->codec_tag;
1654 
1655  // "rtp " is used to distinguish internally created RTP-hint tracks
1656  // (with rtp_ctx) from other tracks.
1657  if (tag == MKTAG('r','t','p',' '))
1658  tag = 0;
1659  if (!tag || (s->strict_std_compliance >= FF_COMPLIANCE_NORMAL &&
1660  (track->par->codec_id == AV_CODEC_ID_DVVIDEO ||
1661  track->par->codec_id == AV_CODEC_ID_RAWVIDEO ||
1662  track->par->codec_id == AV_CODEC_ID_H263 ||
1663  track->par->codec_id == AV_CODEC_ID_H264 ||
1664  track->par->codec_id == AV_CODEC_ID_DNXHD ||
1665  track->par->codec_id == AV_CODEC_ID_MPEG2VIDEO ||
1666  av_get_bits_per_sample(track->par->codec_id)))) { // pcm audio
1667  if (track->par->codec_id == AV_CODEC_ID_DVVIDEO)
1668  tag = mov_get_dv_codec_tag(s, track);
1669  else if (track->par->codec_id == AV_CODEC_ID_RAWVIDEO)
1670  tag = mov_get_rawvideo_codec_tag(s, track);
1671  else if (track->par->codec_id == AV_CODEC_ID_MPEG2VIDEO)
1672  tag = mov_get_mpeg2_xdcam_codec_tag(s, track);
1673  else if (track->par->codec_id == AV_CODEC_ID_H264)
1674  tag = mov_get_h264_codec_tag(s, track);
1675  else if (track->par->codec_id == AV_CODEC_ID_DNXHD)
1676  tag = mov_get_dnxhd_codec_tag(s, track);
1677  else if (track->par->codec_type == AVMEDIA_TYPE_VIDEO) {
1678  tag = ff_codec_get_tag(ff_codec_movvideo_tags, track->par->codec_id);
1679  if (!tag) { // if no mac fcc found, try with Microsoft tags
1680  tag = ff_codec_get_tag(ff_codec_bmp_tags, track->par->codec_id);
1681  if (tag)
1682  av_log(s, AV_LOG_WARNING, "Using MS style video codec tag, "
1683  "the file may be unplayable!\n");
1684  }
1685  } else if (track->par->codec_type == AVMEDIA_TYPE_AUDIO) {
1686  tag = ff_codec_get_tag(ff_codec_movaudio_tags, track->par->codec_id);
1687  if (!tag) { // if no mac fcc found, try with Microsoft tags
1688  int ms_tag = ff_codec_get_tag(ff_codec_wav_tags, track->par->codec_id);
1689  if (ms_tag) {
1690  tag = MKTAG('m', 's', ((ms_tag >> 8) & 0xff), (ms_tag & 0xff));
1691  av_log(s, AV_LOG_WARNING, "Using MS style audio codec tag, "
1692  "the file may be unplayable!\n");
1693  }
1694  }
1695  } else if (track->par->codec_type == AVMEDIA_TYPE_SUBTITLE)
1696  tag = ff_codec_get_tag(ff_codec_movsubtitle_tags, track->par->codec_id);
1697  }
1698 
1699  return tag;
1700 }
1701 
1702 static const AVCodecTag codec_cover_image_tags[] = {
1703  { AV_CODEC_ID_MJPEG, 0xD },
1704  { AV_CODEC_ID_PNG, 0xE },
1705  { AV_CODEC_ID_BMP, 0x1B },
1706  { AV_CODEC_ID_NONE, 0 },
1707 };
1708 
1709 static unsigned int validate_codec_tag(const AVCodecTag *const *tags,
1710  unsigned int tag, int codec_id)
1711 {
1712  int i;
1713 
1714  /**
1715  * Check that tag + id is in the table
1716  */
1717  for (i = 0; tags && tags[i]; i++) {
1718  const AVCodecTag *codec_tags = tags[i];
1719  while (codec_tags->id != AV_CODEC_ID_NONE) {
1720  if (ff_toupper4(codec_tags->tag) == ff_toupper4(tag) &&
1721  codec_tags->id == codec_id)
1722  return codec_tags->tag;
1723  codec_tags++;
1724  }
1725  }
1726  return 0;
1727 }
1728 
1729 static unsigned int mov_find_codec_tag(AVFormatContext *s, MOVTrack *track)
1730 {
1731  if (is_cover_image(track->st))
1732  return ff_codec_get_tag(codec_cover_image_tags, track->par->codec_id);
1733 
1734  if (track->mode == MODE_IPOD)
1735  if (!av_match_ext(s->url, "m4a") &&
1736  !av_match_ext(s->url, "m4v") &&
1737  !av_match_ext(s->url, "m4b"))
1738  av_log(s, AV_LOG_WARNING, "Warning, extension is not .m4a nor .m4v "
1739  "Quicktime/Ipod might not play the file\n");
1740 
1741  if (track->mode == MODE_MOV) {
1742  return mov_get_codec_tag(s, track);
1743  } else
1744  return validate_codec_tag(s->oformat->codec_tag, track->par->codec_tag,
1745  track->par->codec_id);
1746 }
1747 
1748 /** Write uuid atom.
1749  * Needed to make file play in iPods running newest firmware
1750  * goes after avcC atom in moov.trak.mdia.minf.stbl.stsd.avc1
1751  */
1752 static int mov_write_uuid_tag_ipod(AVIOContext *pb)
1753 {
1754  avio_wb32(pb, 28);
1755  ffio_wfourcc(pb, "uuid");
1756  avio_wb32(pb, 0x6b6840f2);
1757  avio_wb32(pb, 0x5f244fc5);
1758  avio_wb32(pb, 0xba39a51b);
1759  avio_wb32(pb, 0xcf0323f3);
1760  avio_wb32(pb, 0x0);
1761  return 28;
1762 }
1763 
1764 static const uint16_t fiel_data[] = {
1765  0x0000, 0x0100, 0x0201, 0x0206, 0x0209, 0x020e
1766 };
1767 
1768 static int mov_write_fiel_tag(AVIOContext *pb, MOVTrack *track, int field_order)
1769 {
1770  unsigned mov_field_order = 0;
1771  if (field_order < FF_ARRAY_ELEMS(fiel_data))
1772  mov_field_order = fiel_data[field_order];
1773  else
1774  return 0;
1775  avio_wb32(pb, 10);
1776  ffio_wfourcc(pb, "fiel");
1777  avio_wb16(pb, mov_field_order);
1778  return 10;
1779 }
1780 
1781 static int mov_write_subtitle_tag(AVIOContext *pb, MOVTrack *track)
1782 {
1783  int ret = AVERROR_BUG;
1784  int64_t pos = avio_tell(pb);
1785  avio_wb32(pb, 0); /* size */
1786  avio_wl32(pb, track->tag); // store it byteswapped
1787  avio_wb32(pb, 0); /* Reserved */
1788  avio_wb16(pb, 0); /* Reserved */
1789  avio_wb16(pb, 1); /* Data-reference index */
1790 
1791  if (track->par->codec_id == AV_CODEC_ID_DVD_SUBTITLE)
1792  mov_write_esds_tag(pb, track);
1793  else if (track->par->codec_id == AV_CODEC_ID_TTML) {
1794  switch (track->par->codec_tag) {
1795  case MOV_ISMV_TTML_TAG:
1796  // ISMV dfxp requires no extradata.
1797  break;
1798  case MOV_MP4_TTML_TAG:
1799  // As specified in 14496-30, XMLSubtitleSampleEntry
1800  // Namespace
1801  avio_put_str(pb, "http://www.w3.org/ns/ttml");
1802  // Empty schema_location
1803  avio_w8(pb, 0);
1804  // Empty auxiliary_mime_types
1805  avio_w8(pb, 0);
1806  break;
1807  default:
1808  av_log(NULL, AV_LOG_ERROR,
1809  "Unknown codec tag '%s' utilized for TTML stream with "
1810  "index %d (track id %d)!\n",
1811  av_fourcc2str(track->par->codec_tag), track->st->index,
1812  track->track_id);
1813  return AVERROR(EINVAL);
1814  }
1815  } else if (track->par->extradata_size)
1816  avio_write(pb, track->par->extradata, track->par->extradata_size);
1817 
1818  if (track->mode == MODE_MP4 &&
1819  ((ret = mov_write_btrt_tag(pb, track)) < 0))
1820  return ret;
1821 
1822  return update_size(pb, pos);
1823 }
1824 
1825 static int mov_write_st3d_tag(AVFormatContext *s, AVIOContext *pb, AVStereo3D *stereo_3d)
1826 {
1827  int8_t stereo_mode;
1828 
1829  if (stereo_3d->flags != 0) {
1830  av_log(s, AV_LOG_WARNING, "Unsupported stereo_3d flags %x. st3d not written.\n", stereo_3d->flags);
1831  return 0;
1832  }
1833 
1834  switch (stereo_3d->type) {
1835  case AV_STEREO3D_2D:
1836  stereo_mode = 0;
1837  break;
1838  case AV_STEREO3D_TOPBOTTOM:
1839  stereo_mode = 1;
1840  break;
1841  case AV_STEREO3D_SIDEBYSIDE:
1842  stereo_mode = 2;
1843  break;
1844  default:
1845  av_log(s, AV_LOG_WARNING, "Unsupported stereo_3d type %s. st3d not written.\n", av_stereo3d_type_name(stereo_3d->type));
1846  return 0;
1847  }
1848  avio_wb32(pb, 13); /* size */
1849  ffio_wfourcc(pb, "st3d");
1850  avio_wb32(pb, 0); /* version = 0 & flags = 0 */
1851  avio_w8(pb, stereo_mode);
1852  return 13;
1853 }
1854 
1855 static int mov_write_sv3d_tag(AVFormatContext *s, AVIOContext *pb, AVSphericalMapping *spherical_mapping)
1856 {
1857  int64_t sv3d_pos, svhd_pos, proj_pos;
1858  const char* metadata_source = s->flags & AVFMT_FLAG_BITEXACT ? "Lavf" : LIBAVFORMAT_IDENT;
1859 
1860  if (spherical_mapping->projection != AV_SPHERICAL_EQUIRECTANGULAR &&
1861  spherical_mapping->projection != AV_SPHERICAL_EQUIRECTANGULAR_TILE &&
1862  spherical_mapping->projection != AV_SPHERICAL_CUBEMAP) {
1863  av_log(s, AV_LOG_WARNING, "Unsupported projection %d. sv3d not written.\n", spherical_mapping->projection);
1864  return 0;
1865  }
1866 
1867  sv3d_pos = avio_tell(pb);
1868  avio_wb32(pb, 0); /* size */
1869  ffio_wfourcc(pb, "sv3d");
1870 
1871  svhd_pos = avio_tell(pb);
1872  avio_wb32(pb, 0); /* size */
1873  ffio_wfourcc(pb, "svhd");
1874  avio_wb32(pb, 0); /* version = 0 & flags = 0 */
1875  avio_put_str(pb, metadata_source);
1876  update_size(pb, svhd_pos);
1877 
1878  proj_pos = avio_tell(pb);
1879  avio_wb32(pb, 0); /* size */
1880  ffio_wfourcc(pb, "proj");
1881 
1882  avio_wb32(pb, 24); /* size */
1883  ffio_wfourcc(pb, "prhd");
1884  avio_wb32(pb, 0); /* version = 0 & flags = 0 */
1885  avio_wb32(pb, spherical_mapping->yaw);
1886  avio_wb32(pb, spherical_mapping->pitch);
1887  avio_wb32(pb, spherical_mapping->roll);
1888 
1889  switch (spherical_mapping->projection) {
1890  case AV_SPHERICAL_EQUIRECTANGULAR:
1891  case AV_SPHERICAL_EQUIRECTANGULAR_TILE:
1892  avio_wb32(pb, 28); /* size */
1893  ffio_wfourcc(pb, "equi");
1894  avio_wb32(pb, 0); /* version = 0 & flags = 0 */
1895  avio_wb32(pb, spherical_mapping->bound_top);
1896  avio_wb32(pb, spherical_mapping->bound_bottom);
1897  avio_wb32(pb, spherical_mapping->bound_left);
1898  avio_wb32(pb, spherical_mapping->bound_right);
1899  break;
1900  case AV_SPHERICAL_CUBEMAP:
1901  avio_wb32(pb, 20); /* size */
1902  ffio_wfourcc(pb, "cbmp");
1903  avio_wb32(pb, 0); /* version = 0 & flags = 0 */
1904  avio_wb32(pb, 0); /* layout */
1905  avio_wb32(pb, spherical_mapping->padding); /* padding */
1906  break;
1907  }
1908  update_size(pb, proj_pos);
1909 
1910  return update_size(pb, sv3d_pos);
1911 }
1912 
1913 static int mov_write_dvcc_dvvc_tag(AVFormatContext *s, AVIOContext *pb, AVDOVIDecoderConfigurationRecord *dovi)
1914 {
1915  uint8_t buf[ISOM_DVCC_DVVC_SIZE];
1916 
1917  avio_wb32(pb, 32); /* size = 8 + 24 */
1918  if (dovi->dv_profile > 10)
1919  ffio_wfourcc(pb, "dvwC");
1920  else if (dovi->dv_profile > 7)
1921  ffio_wfourcc(pb, "dvvC");
1922  else
1923  ffio_wfourcc(pb, "dvcC");
1924 
1925  ff_isom_put_dvcc_dvvc(s, buf, dovi);
1926  avio_write(pb, buf, sizeof(buf));
1927 
1928  return 32; /* 8 + 24 */
1929 }
1930 
1931 static int mov_write_clap_tag(AVIOContext *pb, MOVTrack *track)
1932 {
1933  avio_wb32(pb, 40);
1934  ffio_wfourcc(pb, "clap");
1935  avio_wb32(pb, track->par->width); /* apertureWidth_N */
1936  avio_wb32(pb, 1); /* apertureWidth_D (= 1) */
1937  avio_wb32(pb, track->height); /* apertureHeight_N */
1938  avio_wb32(pb, 1); /* apertureHeight_D (= 1) */
1939  avio_wb32(pb, 0); /* horizOff_N (= 0) */
1940  avio_wb32(pb, 1); /* horizOff_D (= 1) */
1941  avio_wb32(pb, 0); /* vertOff_N (= 0) */
1942  avio_wb32(pb, 1); /* vertOff_D (= 1) */
1943  return 40;
1944 }
1945 
1946 static int mov_write_pasp_tag(AVIOContext *pb, MOVTrack *track)
1947 {
1948  AVRational sar;
1949  av_reduce(&sar.num, &sar.den, track->par->sample_aspect_ratio.num,
1950  track->par->sample_aspect_ratio.den, INT_MAX);
1951 
1952  avio_wb32(pb, 16);
1953  ffio_wfourcc(pb, "pasp");
1954  avio_wb32(pb, sar.num);
1955  avio_wb32(pb, sar.den);
1956  return 16;
1957 }
1958 
1959 static int mov_write_gama_tag(AVFormatContext *s, AVIOContext *pb, MOVTrack *track, double gamma)
1960 {
1961  uint32_t gama = 0;
1962  if (gamma <= 0.0) {
1963  gamma = avpriv_get_gamma_from_trc(track->par->color_trc);
1964  }
1965  av_log(s, AV_LOG_DEBUG, "gamma value %g\n", gamma);
1966 
1967  if (gamma > 1e-6) {
1968  gama = (uint32_t)lrint((double)(1<<16) * gamma);
1969  av_log(s, AV_LOG_DEBUG, "writing gama value %"PRId32"\n", gama);
1970 
1971  av_assert0(track->mode == MODE_MOV);
1972  avio_wb32(pb, 12);
1973  ffio_wfourcc(pb, "gama");
1974  avio_wb32(pb, gama);
1975  return 12;
1976  } else {
1977  av_log(s, AV_LOG_WARNING, "gamma value unknown, unable to write gama atom\n");
1978  }
1979  return 0;
1980 }
1981 
1982 static int mov_write_colr_tag(AVIOContext *pb, MOVTrack *track, int prefer_icc)
1983 {
1984  int64_t pos = avio_tell(pb);
1985 
1986  // Ref (MOV): https://developer.apple.com/library/mac/technotes/tn2162/_index.html#//apple_ref/doc/uid/DTS40013070-CH1-TNTAG9
1987  // Ref (MP4): ISO/IEC 14496-12:2012
1988 
1989  const uint8_t *icc_profile;
1990  size_t icc_profile_size;
1991 
1992  if (prefer_icc) {
1993  icc_profile = av_stream_get_side_data(track->st, AV_PKT_DATA_ICC_PROFILE, &icc_profile_size);
1994 
1995  if (icc_profile) {
1996  avio_wb32(pb, 12 + icc_profile_size);
1997  ffio_wfourcc(pb, "colr");
1998  ffio_wfourcc(pb, "prof");
1999  avio_write(pb, icc_profile, icc_profile_size);
2000  return 12 + icc_profile_size;
2001  }
2002  else {
2003  av_log(NULL, AV_LOG_INFO, "no ICC profile found, will write nclx/nclc colour info instead\n");
2004  }
2005  }
2006 
2007  /* We should only ever be called by MOV or MP4. */
2008  av_assert0(track->mode == MODE_MOV || track->mode == MODE_MP4);
2009 
2010  avio_wb32(pb, 0); /* size */
2011  ffio_wfourcc(pb, "colr");
2012  if (track->mode == MODE_MP4)
2013  ffio_wfourcc(pb, "nclx");
2014  else
2015  ffio_wfourcc(pb, "nclc");
2016  // Do not try to guess the color info if it is AVCOL_PRI_UNSPECIFIED.
2017  // e.g., Dolby Vision for Apple devices should be set to AVCOL_PRI_UNSPECIFIED. See
2018  // https://developer.apple.com/av-foundation/High-Dynamic-Range-Metadata-for-Apple-Devices.pdf
2019  avio_wb16(pb, track->par->color_primaries);
2020  avio_wb16(pb, track->par->color_trc);
2021  avio_wb16(pb, track->par->color_space);
2022  if (track->mode == MODE_MP4) {
2023  int full_range = track->par->color_range == AVCOL_RANGE_JPEG;
2024  avio_w8(pb, full_range << 7);
2025  }
2026 
2027  return update_size(pb, pos);
2028 }
2029 
2030 static int mov_write_clli_tag(AVIOContext *pb, MOVTrack *track)
2031 {
2032  const uint8_t *side_data;
2033  const AVContentLightMetadata *content_light_metadata;
2034 
2035  side_data = av_stream_get_side_data(track->st, AV_PKT_DATA_CONTENT_LIGHT_LEVEL, NULL);
2036  if (!side_data) {
2037  return 0;
2038  }
2039  content_light_metadata = (const AVContentLightMetadata*)side_data;
2040 
2041  avio_wb32(pb, 12); // size
2042  ffio_wfourcc(pb, "clli");
2043  avio_wb16(pb, content_light_metadata->MaxCLL);
2044  avio_wb16(pb, content_light_metadata->MaxFALL);
2045  return 12;
2046 }
2047 
2048 static inline int64_t rescale_mdcv(AVRational q, int b)
2049 {
2050  return av_rescale(q.num, b, q.den);
2051 }
2052 
2053 static int mov_write_mdcv_tag(AVIOContext *pb, MOVTrack *track)
2054 {
2055  const int chroma_den = 50000;
2056  const int luma_den = 10000;
2057  const uint8_t *side_data;
2058  const AVMasteringDisplayMetadata *metadata;
2059 
2060  side_data = av_stream_get_side_data(track->st, AV_PKT_DATA_MASTERING_DISPLAY_METADATA, NULL);
2061  metadata = (const AVMasteringDisplayMetadata*)side_data;
2062  if (!metadata || !metadata->has_primaries || !metadata->has_luminance) {
2063  return 0;
2064  }
2065 
2066  avio_wb32(pb, 32); // size
2067  ffio_wfourcc(pb, "mdcv");
2068  avio_wb16(pb, rescale_mdcv(metadata->display_primaries[1][0], chroma_den));
2069  avio_wb16(pb, rescale_mdcv(metadata->display_primaries[1][1], chroma_den));
2070  avio_wb16(pb, rescale_mdcv(metadata->display_primaries[2][0], chroma_den));
2071  avio_wb16(pb, rescale_mdcv(metadata->display_primaries[2][1], chroma_den));
2072  avio_wb16(pb, rescale_mdcv(metadata->display_primaries[0][0], chroma_den));
2073  avio_wb16(pb, rescale_mdcv(metadata->display_primaries[0][1], chroma_den));
2074  avio_wb16(pb, rescale_mdcv(metadata->white_point[0], chroma_den));
2075  avio_wb16(pb, rescale_mdcv(metadata->white_point[1], chroma_den));
2076  avio_wb32(pb, rescale_mdcv(metadata->max_luminance, luma_den));
2077  avio_wb32(pb, rescale_mdcv(metadata->min_luminance, luma_den));
2078  return 32;
2079 }
2080 
2081 static void find_compressor(char * compressor_name, int len, MOVTrack *track)
2082 {
2083  AVDictionaryEntry *encoder;
2084  int xdcam_res = (track->par->width == 1280 && track->par->height == 720)
2085  || (track->par->width == 1440 && track->par->height == 1080)
2086  || (track->par->width == 1920 && track->par->height == 1080);
2087 
2088  if (track->mode == MODE_MOV &&
2089  (encoder = av_dict_get(track->st->metadata, "encoder", NULL, 0))) {
2090  av_strlcpy(compressor_name, encoder->value, 32);
2091  } else if (track->par->codec_id == AV_CODEC_ID_MPEG2VIDEO && xdcam_res) {
2092  int interlaced = track->par->field_order > AV_FIELD_PROGRESSIVE;
2093  AVStream *st = track->st;
2094  int rate = defined_frame_rate(NULL, st);
2095  av_strlcatf(compressor_name, len, "XDCAM");
2096  if (track->par->format == AV_PIX_FMT_YUV422P) {
2097  av_strlcatf(compressor_name, len, " HD422");
2098  } else if(track->par->width == 1440) {
2099  av_strlcatf(compressor_name, len, " HD");
2100  } else
2101  av_strlcatf(compressor_name, len, " EX");
2102 
2103  av_strlcatf(compressor_name, len, " %d%c", track->par->height, interlaced ? 'i' : 'p');
2104 
2105  av_strlcatf(compressor_name, len, "%d", rate * (interlaced + 1));
2106  }
2107 }
2108 
2109 static int mov_write_video_tag(AVFormatContext *s, AVIOContext *pb, MOVMuxContext *mov, MOVTrack *track)
2110 {
2111  int ret = AVERROR_BUG;
2112  int64_t pos = avio_tell(pb);
2113  char compressor_name[32] = { 0 };
2114  int avid = 0;
2115 
2116  int uncompressed_ycbcr = ((track->par->codec_id == AV_CODEC_ID_RAWVIDEO && track->par->format == AV_PIX_FMT_UYVY422)
2117  || (track->par->codec_id == AV_CODEC_ID_RAWVIDEO && track->par->format == AV_PIX_FMT_YUYV422)
2118  || track->par->codec_id == AV_CODEC_ID_V308
2119  || track->par->codec_id == AV_CODEC_ID_V408
2120  || track->par->codec_id == AV_CODEC_ID_V410
2121  || track->par->codec_id == AV_CODEC_ID_V210);
2122 
2123  avio_wb32(pb, 0); /* size */
2124  if (mov->encryption_scheme != MOV_ENC_NONE) {
2125  ffio_wfourcc(pb, "encv");
2126  } else {
2127  avio_wl32(pb, track->tag); // store it byteswapped
2128  }
2129  avio_wb32(pb, 0); /* Reserved */
2130  avio_wb16(pb, 0); /* Reserved */
2131  avio_wb16(pb, 1); /* Data-reference index */
2132 
2133  if (uncompressed_ycbcr) {
2134  avio_wb16(pb, 2); /* Codec stream version */
2135  } else {
2136  avio_wb16(pb, 0); /* Codec stream version */
2137  }
2138  avio_wb16(pb, 0); /* Codec stream revision (=0) */
2139  if (track->mode == MODE_MOV) {
2140  ffio_wfourcc(pb, "FFMP"); /* Vendor */
2141  if (track->par->codec_id == AV_CODEC_ID_RAWVIDEO || uncompressed_ycbcr) {
2142  avio_wb32(pb, 0); /* Temporal Quality */
2143  avio_wb32(pb, 0x400); /* Spatial Quality = lossless*/
2144  } else {
2145  avio_wb32(pb, 0x200); /* Temporal Quality = normal */
2146  avio_wb32(pb, 0x200); /* Spatial Quality = normal */
2147  }
2148  } else {
2149  ffio_fill(pb, 0, 3 * 4); /* Reserved */
2150  }
2151  avio_wb16(pb, track->par->width); /* Video width */
2152  avio_wb16(pb, track->height); /* Video height */
2153  avio_wb32(pb, 0x00480000); /* Horizontal resolution 72dpi */
2154  avio_wb32(pb, 0x00480000); /* Vertical resolution 72dpi */
2155  avio_wb32(pb, 0); /* Data size (= 0) */
2156  avio_wb16(pb, 1); /* Frame count (= 1) */
2157 
2158  /* FIXME not sure, ISO 14496-1 draft where it shall be set to 0 */
2159  find_compressor(compressor_name, 32, track);
2160  avio_w8(pb, strlen(compressor_name));
2161  avio_write(pb, compressor_name, 31);
2162 
2163  if (track->mode == MODE_MOV &&
2164  (track->par->codec_id == AV_CODEC_ID_V410 || track->par->codec_id == AV_CODEC_ID_V210))
2165  avio_wb16(pb, 0x18);
2166  else if (track->mode == MODE_MOV && track->par->bits_per_coded_sample)
2167  avio_wb16(pb, track->par->bits_per_coded_sample |
2168  (track->par->format == AV_PIX_FMT_GRAY8 ? 0x20 : 0));
2169  else
2170  avio_wb16(pb, 0x18); /* Reserved */
2171 
2172  if (track->mode == MODE_MOV && track->par->format == AV_PIX_FMT_PAL8) {
2173  int pal_size, i;
2174  avio_wb16(pb, 0); /* Color table ID */
2175  avio_wb32(pb, 0); /* Color table seed */
2176  avio_wb16(pb, 0x8000); /* Color table flags */
2177  if (track->par->bits_per_coded_sample < 0 || track->par->bits_per_coded_sample > 8)
2178  return AVERROR(EINVAL);
2179  pal_size = 1 << track->par->bits_per_coded_sample;
2180  avio_wb16(pb, pal_size - 1); /* Color table size (zero-relative) */
2181  for (i = 0; i < pal_size; i++) {
2182  uint32_t rgb = track->palette[i];
2183  uint16_t r = (rgb >> 16) & 0xff;
2184  uint16_t g = (rgb >> 8) & 0xff;
2185  uint16_t b = rgb & 0xff;
2186  avio_wb16(pb, 0);
2187  avio_wb16(pb, (r << 8) | r);
2188  avio_wb16(pb, (g << 8) | g);
2189  avio_wb16(pb, (b << 8) | b);
2190  }
2191  } else
2192  avio_wb16(pb, 0xffff); /* Reserved */
2193 
2194  if (track->tag == MKTAG('m','p','4','v'))
2195  mov_write_esds_tag(pb, track);
2196  else if (track->par->codec_id == AV_CODEC_ID_H263)
2197  mov_write_d263_tag(pb);
2198  else if (track->par->codec_id == AV_CODEC_ID_AVUI ||
2199  track->par->codec_id == AV_CODEC_ID_SVQ3) {
2200  mov_write_extradata_tag(pb, track);
2201  avio_wb32(pb, 0);
2202  } else if (track->par->codec_id == AV_CODEC_ID_DNXHD) {
2203  mov_write_avid_tag(pb, track);
2204  avid = 1;
2205  } else if (track->par->codec_id == AV_CODEC_ID_HEVC)
2206  mov_write_hvcc_tag(pb, track);
2207  else if (track->par->codec_id == AV_CODEC_ID_H264 && !TAG_IS_AVCI(track->tag)) {
2208  mov_write_avcc_tag(pb, track);
2209  if (track->mode == MODE_IPOD)
2210  mov_write_uuid_tag_ipod(pb);
2211  } else if (track->par->codec_id == AV_CODEC_ID_VP9) {
2212  mov_write_vpcc_tag(mov->fc, pb, track);
2213  } else if (track->par->codec_id == AV_CODEC_ID_AV1) {
2214  mov_write_av1c_tag(pb, track);
2215  } else if (track->par->codec_id == AV_CODEC_ID_VC1 && track->vos_len > 0)
2216  mov_write_dvc1_tag(pb, track);
2217  else if (track->par->codec_id == AV_CODEC_ID_VP6F ||
2218  track->par->codec_id == AV_CODEC_ID_VP6A) {
2219  /* Don't write any potential extradata here - the cropping
2220  * is signalled via the normal width/height fields. */
2221  } else if (track->par->codec_id == AV_CODEC_ID_R10K) {
2222  if (track->par->codec_tag == MKTAG('R','1','0','k'))
2223  mov_write_dpxe_tag(pb, track);
2224  } else if (track->vos_len > 0)
2225  mov_write_glbl_tag(pb, track);
2226 
2227  if (track->par->codec_id != AV_CODEC_ID_H264 &&
2228  track->par->codec_id != AV_CODEC_ID_MPEG4 &&
2229  track->par->codec_id != AV_CODEC_ID_DNXHD) {
2230  int field_order = track->par->field_order;
2231 
2232  if (field_order != AV_FIELD_UNKNOWN)
2233  mov_write_fiel_tag(pb, track, field_order);
2234  }
2235 
2236  if (mov->flags & FF_MOV_FLAG_WRITE_GAMA) {
2237  if (track->mode == MODE_MOV)
2238  mov_write_gama_tag(s, pb, track, mov->gamma);
2239  else
2240  av_log(mov->fc, AV_LOG_WARNING, "Not writing 'gama' atom. Format is not MOV.\n");
2241  }
2242  if (track->mode == MODE_MOV || track->mode == MODE_MP4) {
2243  int has_color_info = track->par->color_primaries != AVCOL_PRI_UNSPECIFIED &&
2244  track->par->color_trc != AVCOL_TRC_UNSPECIFIED &&
2245  track->par->color_space != AVCOL_SPC_UNSPECIFIED;
2246  if (has_color_info || mov->flags & FF_MOV_FLAG_WRITE_COLR ||
2247  av_stream_get_side_data(track->st, AV_PKT_DATA_ICC_PROFILE, NULL)) {
2248  int prefer_icc = mov->flags & FF_MOV_FLAG_PREFER_ICC || !has_color_info;
2249  mov_write_colr_tag(pb, track, prefer_icc);
2250  } else if (mov->flags & FF_MOV_FLAG_WRITE_COLR) {
2251  av_log(mov->fc, AV_LOG_WARNING, "Not writing 'colr' atom. Format is not MOV or MP4.\n");
2252  }
2253  }
2254  if (track->mode == MODE_MOV || track->mode == MODE_MP4) {
2255  mov_write_clli_tag(pb, track);
2256  mov_write_mdcv_tag(pb, track);
2257  }
2258 
2259  if (track->mode == MODE_MP4 && mov->fc->strict_std_compliance <= FF_COMPLIANCE_UNOFFICIAL) {
2260  AVStereo3D* stereo_3d = (AVStereo3D*) av_stream_get_side_data(track->st, AV_PKT_DATA_STEREO3D, NULL);
2261  AVSphericalMapping* spherical_mapping = (AVSphericalMapping*)av_stream_get_side_data(track->st, AV_PKT_DATA_SPHERICAL, NULL);
2262  AVDOVIDecoderConfigurationRecord *dovi = (AVDOVIDecoderConfigurationRecord *)
2263  av_stream_get_side_data(track->st, AV_PKT_DATA_DOVI_CONF, NULL);
2264 
2265  if (stereo_3d)
2266  mov_write_st3d_tag(s, pb, stereo_3d);
2267  if (spherical_mapping)
2268  mov_write_sv3d_tag(mov->fc, pb, spherical_mapping);
2269  if (dovi)
2270  mov_write_dvcc_dvvc_tag(s, pb, dovi);
2271  }
2272 
2273  if (track->par->sample_aspect_ratio.den && track->par->sample_aspect_ratio.num) {
2274  mov_write_pasp_tag(pb, track);
2275  }
2276 
2277  if (uncompressed_ycbcr){
2278  mov_write_clap_tag(pb, track);
2279  }
2280 
2281  if (mov->encryption_scheme != MOV_ENC_NONE) {
2282  ff_mov_cenc_write_sinf_tag(track, pb, mov->encryption_kid);
2283  }
2284 
2285  if (track->mode == MODE_MP4 &&
2286  ((ret = mov_write_btrt_tag(pb, track)) < 0))
2287  return ret;
2288 
2289  /* extra padding for avid stsd */
2290  /* https://developer.apple.com/library/mac/documentation/QuickTime/QTFF/QTFFChap2/qtff2.html#//apple_ref/doc/uid/TP40000939-CH204-61112 */
2291  if (avid)
2292  avio_wb32(pb, 0);
2293 
2294  return update_size(pb, pos);
2295 }
2296 
2297 static int mov_write_rtp_tag(AVIOContext *pb, MOVTrack *track)
2298 {
2299  int64_t pos = avio_tell(pb);
2300  avio_wb32(pb, 0); /* size */
2301  ffio_wfourcc(pb, "rtp ");
2302  avio_wb32(pb, 0); /* Reserved */
2303  avio_wb16(pb, 0); /* Reserved */
2304  avio_wb16(pb, 1); /* Data-reference index */
2305 
2306  avio_wb16(pb, 1); /* Hint track version */
2307  avio_wb16(pb, 1); /* Highest compatible version */
2308  avio_wb32(pb, track->max_packet_size); /* Max packet size */
2309 
2310  avio_wb32(pb, 12); /* size */
2311  ffio_wfourcc(pb, "tims");
2312  avio_wb32(pb, track->timescale);
2313 
2314  return update_size(pb, pos);
2315 }
2316 
2317 static int mov_write_source_reference_tag(AVIOContext *pb, MOVTrack *track, const char *reel_name)
2318 {
2319  uint64_t str_size =strlen(reel_name);
2320  int64_t pos = avio_tell(pb);
2321 
2322  if (str_size >= UINT16_MAX){
2323  av_log(NULL, AV_LOG_ERROR, "reel_name length %"PRIu64" is too large\n", str_size);
2324  avio_wb16(pb, 0);
2325  return AVERROR(EINVAL);
2326  }
2327 
2328  avio_wb32(pb, 0); /* size */
2329  ffio_wfourcc(pb, "name"); /* Data format */
2330  avio_wb16(pb, str_size); /* string size */
2331  avio_wb16(pb, track->language); /* langcode */
2332  avio_write(pb, reel_name, str_size); /* reel name */
2333  return update_size(pb,pos);
2334 }
2335 
2336 static int mov_write_tmcd_tag(AVIOContext *pb, MOVTrack *track)
2337 {
2338  int64_t pos = avio_tell(pb);
2339 #if 1
2340  int frame_duration;
2341  int nb_frames;
2342  AVDictionaryEntry *t = NULL;
2343 
2344  if (!track->st->avg_frame_rate.num || !track->st->avg_frame_rate.den) {
2345  av_log(NULL, AV_LOG_ERROR, "avg_frame_rate not set for tmcd track.\n");
2346  return AVERROR(EINVAL);
2347  } else {
2348  frame_duration = av_rescale(track->timescale, track->st->avg_frame_rate.den, track->st->avg_frame_rate.num);
2349  nb_frames = ROUNDED_DIV(track->st->avg_frame_rate.num, track->st->avg_frame_rate.den);
2350  }
2351 
2352  if (nb_frames > 255) {
2353  av_log(NULL, AV_LOG_ERROR, "fps %d is too large\n", nb_frames);
2354  return AVERROR(EINVAL);
2355  }
2356 
2357  avio_wb32(pb, 0); /* size */
2358  ffio_wfourcc(pb, "tmcd"); /* Data format */
2359  avio_wb32(pb, 0); /* Reserved */
2360  avio_wb32(pb, 1); /* Data reference index */
2361  avio_wb32(pb, 0); /* Flags */
2362  avio_wb32(pb, track->timecode_flags); /* Flags (timecode) */
2363  avio_wb32(pb, track->timescale); /* Timescale */
2364  avio_wb32(pb, frame_duration); /* Frame duration */
2365  avio_w8(pb, nb_frames); /* Number of frames */
2366  avio_w8(pb, 0); /* Reserved */
2367 
2368  t = av_dict_get(track->st->metadata, "reel_name", NULL, 0);
2369  if (t && utf8len(t->value) && track->mode != MODE_MP4)
2370  mov_write_source_reference_tag(pb, track, t->value);
2371  else
2372  avio_wb16(pb, 0); /* zero size */
2373 #else
2374 
2375  avio_wb32(pb, 0); /* size */
2376  ffio_wfourcc(pb, "tmcd"); /* Data format */
2377  avio_wb32(pb, 0); /* Reserved */
2378  avio_wb32(pb, 1); /* Data reference index */
2379  if (track->par->extradata_size)
2380  avio_write(pb, track->par->extradata, track->par->extradata_size);
2381 #endif
2382  return update_size(pb, pos);
2383 }
2384 
2385 static int mov_write_gpmd_tag(AVIOContext *pb, const MOVTrack *track)
2386 {
2387  int64_t pos = avio_tell(pb);
2388  avio_wb32(pb, 0); /* size */
2389  ffio_wfourcc(pb, "gpmd");
2390  avio_wb32(pb, 0); /* Reserved */
2391  avio_wb16(pb, 0); /* Reserved */
2392  avio_wb16(pb, 1); /* Data-reference index */
2393  avio_wb32(pb, 0); /* Reserved */
2394  return update_size(pb, pos);
2395 }
2396 
2397 static int mov_write_stsd_tag(AVFormatContext *s, AVIOContext *pb, MOVMuxContext *mov, MOVTrack *track)
2398 {
2399  int64_t pos = avio_tell(pb);
2400  int ret = 0;
2401  avio_wb32(pb, 0); /* size */
2402  ffio_wfourcc(pb, "stsd");
2403  avio_wb32(pb, 0); /* version & flags */
2404  avio_wb32(pb, 1); /* entry count */
2405  if (track->par->codec_type == AVMEDIA_TYPE_VIDEO)
2406  ret = mov_write_video_tag(s, pb, mov, track);
2407  else if (track->par->codec_type == AVMEDIA_TYPE_AUDIO)
2408  ret = mov_write_audio_tag(s, pb, mov, track);
2409  else if (track->par->codec_type == AVMEDIA_TYPE_SUBTITLE)
2410  ret = mov_write_subtitle_tag(pb, track);
2411  else if (track->par->codec_tag == MKTAG('r','t','p',' '))
2412  ret = mov_write_rtp_tag(pb, track);
2413  else if (track->par->codec_tag == MKTAG('t','m','c','d'))
2414  ret = mov_write_tmcd_tag(pb, track);
2415  else if (track->par->codec_tag == MKTAG('g','p','m','d'))
2416  ret = mov_write_gpmd_tag(pb, track);
2417 
2418  if (ret < 0)
2419  return ret;
2420 
2421  return update_size(pb, pos);
2422 }
2423 
2424 static int mov_write_ctts_tag(AVFormatContext *s, AVIOContext *pb, MOVTrack *track)
2425 {
2426  MOVMuxContext *mov = s->priv_data;
2427  MOVCtts *ctts_entries;
2428  uint32_t entries = 0;
2429  uint32_t atom_size;
2430  int i;
2431 
2432  ctts_entries = av_malloc_array((track->entry + 1), sizeof(*ctts_entries)); /* worst case */
2433  if (!ctts_entries)
2434  return AVERROR(ENOMEM);
2435  ctts_entries[0].count = 1;
2436  ctts_entries[0].duration = track->cluster[0].cts;
2437  for (i = 1; i < track->entry; i++) {
2438  if (track->cluster[i].cts == ctts_entries[entries].duration) {
2439  ctts_entries[entries].count++; /* compress */
2440  } else {
2441  entries++;
2442  ctts_entries[entries].duration = track->cluster[i].cts;
2443  ctts_entries[entries].count = 1;
2444  }
2445  }
2446  entries++; /* last one */
2447  atom_size = 16 + (entries * 8);
2448  avio_wb32(pb, atom_size); /* size */
2449  ffio_wfourcc(pb, "ctts");
2450  if (mov->flags & FF_MOV_FLAG_NEGATIVE_CTS_OFFSETS)
2451  avio_w8(pb, 1); /* version */
2452  else
2453  avio_w8(pb, 0); /* version */
2454  avio_wb24(pb, 0); /* flags */
2455  avio_wb32(pb, entries); /* entry count */
2456  for (i = 0; i < entries; i++) {
2457  avio_wb32(pb, ctts_entries[i].count);
2458  avio_wb32(pb, ctts_entries[i].duration);
2459  }
2460  av_free(ctts_entries);
2461  return atom_size;
2462 }
2463 
2464 /* Time to sample atom */
2465 static int mov_write_stts_tag(AVIOContext *pb, MOVTrack *track)
2466 {
2467  MOVStts *stts_entries = NULL;
2468  uint32_t entries = -1;
2469  uint32_t atom_size;
2470  int i;
2471 
2472  if (track->par->codec_type == AVMEDIA_TYPE_AUDIO && !track->audio_vbr) {
2473  stts_entries = av_malloc(sizeof(*stts_entries)); /* one entry */
2474  if (!stts_entries)
2475  return AVERROR(ENOMEM);
2476  stts_entries[0].count = track->sample_count;
2477  stts_entries[0].duration = 1;
2478  entries = 1;
2479  } else {
2480  if (track->entry) {
2481  stts_entries = av_malloc_array(track->entry, sizeof(*stts_entries)); /* worst case */
2482  if (!stts_entries)
2483  return AVERROR(ENOMEM);
2484  }
2485  for (i = 0; i < track->entry; i++) {
2486  int duration = get_cluster_duration(track, i);
2487  if (i && duration == stts_entries[entries].duration) {
2488  stts_entries[entries].count++; /* compress */
2489  } else {
2490  entries++;
2491  stts_entries[entries].duration = duration;
2492  stts_entries[entries].count = 1;
2493  }
2494  }
2495  entries++; /* last one */
2496  }
2497  atom_size = 16 + (entries * 8);
2498  avio_wb32(pb, atom_size); /* size */
2499  ffio_wfourcc(pb, "stts");
2500  avio_wb32(pb, 0); /* version & flags */
2501  avio_wb32(pb, entries); /* entry count */
2502  for (i = 0; i < entries; i++) {
2503  avio_wb32(pb, stts_entries[i].count);
2504  avio_wb32(pb, stts_entries[i].duration);
2505  }
2506  av_free(stts_entries);
2507  return atom_size;
2508 }
2509 
2510 static int mov_write_dref_tag(AVIOContext *pb)
2511 {
2512  avio_wb32(pb, 28); /* size */
2513  ffio_wfourcc(pb, "dref");
2514  avio_wb32(pb, 0); /* version & flags */
2515  avio_wb32(pb, 1); /* entry count */
2516 
2517  avio_wb32(pb, 0xc); /* size */
2518  //FIXME add the alis and rsrc atom
2519  ffio_wfourcc(pb, "url ");
2520  avio_wb32(pb, 1); /* version & flags */
2521 
2522  return 28;
2523 }
2524 
2525 static int mov_preroll_write_stbl_atoms(AVIOContext *pb, MOVTrack *track)
2526 {
2527  struct sgpd_entry {
2528  int count;
2529  int16_t roll_distance;
2530  int group_description_index;
2531  };
2532 
2533  struct sgpd_entry *sgpd_entries = NULL;
2534  int entries = -1;
2535  int group = 0;
2536  int i, j;
2537 
2538  const int OPUS_SEEK_PREROLL_MS = 80;
2539  int roll_samples = av_rescale_q(OPUS_SEEK_PREROLL_MS,
2540  (AVRational){1, 1000},
2541  (AVRational){1, 48000});
2542 
2543  if (!track->entry)
2544  return 0;
2545 
2546  sgpd_entries = av_malloc_array(track->entry, sizeof(*sgpd_entries));
2547  if (!sgpd_entries)
2548  return AVERROR(ENOMEM);
2549 
2550  av_assert0(track->par->codec_id == AV_CODEC_ID_OPUS || track->par->codec_id == AV_CODEC_ID_AAC);
2551 
2552  if (track->par->codec_id == AV_CODEC_ID_OPUS) {
2553  for (i = 0; i < track->entry; i++) {
2554  int roll_samples_remaining = roll_samples;
2555  int distance = 0;
2556  for (j = i - 1; j >= 0; j--) {
2557  roll_samples_remaining -= get_cluster_duration(track, j);
2558  distance++;
2559  if (roll_samples_remaining <= 0)
2560  break;
2561  }
2562  /* We don't have enough preceeding samples to compute a valid
2563  roll_distance here, so this sample can't be independently
2564  decoded. */
2565  if (roll_samples_remaining > 0)
2566  distance = 0;
2567  /* Verify distance is a maximum of 32 (2.5ms) packets. */
2568  if (distance > 32)
2569  return AVERROR_INVALIDDATA;
2570  if (i && distance == sgpd_entries[entries].roll_distance) {
2571  sgpd_entries[entries].count++;
2572  } else {
2573  entries++;
2574  sgpd_entries[entries].count = 1;
2575  sgpd_entries[entries].roll_distance = distance;
2576  sgpd_entries[entries].group_description_index = distance ? ++group : 0;
2577  }
2578  }
2579  } else {
2580  entries++;
2581  sgpd_entries[entries].count = track->sample_count;
2582  sgpd_entries[entries].roll_distance = 1;
2583  sgpd_entries[entries].group_description_index = ++group;
2584  }
2585  entries++;
2586 
2587  if (!group) {
2588  av_free(sgpd_entries);
2589  return 0;
2590  }
2591 
2592  /* Write sgpd tag */
2593  avio_wb32(pb, 24 + (group * 2)); /* size */
2594  ffio_wfourcc(pb, "sgpd");
2595  avio_wb32(pb, 1 << 24); /* fullbox */
2596  ffio_wfourcc(pb, "roll");
2597  avio_wb32(pb, 2); /* default_length */
2598  avio_wb32(pb, group); /* entry_count */
2599  for (i = 0; i < entries; i++) {
2600  if (sgpd_entries[i].group_description_index) {
2601  avio_wb16(pb, -sgpd_entries[i].roll_distance); /* roll_distance */
2602  }
2603  }
2604 
2605  /* Write sbgp tag */
2606  avio_wb32(pb, 20 + (entries * 8)); /* size */
2607  ffio_wfourcc(pb, "sbgp");
2608  avio_wb32(pb, 0); /* fullbox */
2609  ffio_wfourcc(pb, "roll");
2610  avio_wb32(pb, entries); /* entry_count */
2611  for (i = 0; i < entries; i++) {
2612  avio_wb32(pb, sgpd_entries[i].count); /* sample_count */
2613  avio_wb32(pb, sgpd_entries[i].group_description_index); /* group_description_index */
2614  }
2615 
2616  av_free(sgpd_entries);
2617  return 0;
2618 }
2619 
2620 static int mov_write_stbl_tag(AVFormatContext *s, AVIOContext *pb, MOVMuxContext *mov, MOVTrack *track)
2621 {
2622  int64_t pos = avio_tell(pb);
2623  int ret = 0;
2624 
2625  avio_wb32(pb, 0); /* size */
2626  ffio_wfourcc(pb, "stbl");
2627  if ((ret = mov_write_stsd_tag(s, pb, mov, track)) < 0)
2628  return ret;
2629  mov_write_stts_tag(pb, track);
2630  if ((track->par->codec_type == AVMEDIA_TYPE_VIDEO ||
2631  track->par->codec_id == AV_CODEC_ID_TRUEHD ||
2632  track->par->codec_id == AV_CODEC_ID_MPEGH_3D_AUDIO ||
2633  track->par->codec_tag == MKTAG('r','t','p',' ')) &&
2634  track->has_keyframes && track->has_keyframes < track->entry)
2635  mov_write_stss_tag(pb, track, MOV_SYNC_SAMPLE);
2636  if (track->par->codec_type == AVMEDIA_TYPE_VIDEO && track->has_disposable)
2637  mov_write_sdtp_tag(pb, track);
2638  if (track->mode == MODE_MOV && track->flags & MOV_TRACK_STPS)
2639  mov_write_stss_tag(pb, track, MOV_PARTIAL_SYNC_SAMPLE);
2640  if (track->par->codec_type == AVMEDIA_TYPE_VIDEO &&
2641  track->flags & MOV_TRACK_CTTS && track->entry) {
2642 
2643  if ((ret = mov_write_ctts_tag(s, pb, track)) < 0)
2644  return ret;
2645  }
2646  mov_write_stsc_tag(pb, track);
2647  mov_write_stsz_tag(pb, track);
2648  mov_write_stco_tag(pb, track);
2649  if (track->cenc.aes_ctr) {
2650  ff_mov_cenc_write_stbl_atoms(&track->cenc, pb);
2651  }
2652  if (track->par->codec_id == AV_CODEC_ID_OPUS || track->par->codec_id == AV_CODEC_ID_AAC) {
2653  mov_preroll_write_stbl_atoms(pb, track);
2654  }
2655  return update_size(pb, pos);
2656 }
2657 
2658 static int mov_write_dinf_tag(AVIOContext *pb)
2659 {
2660  int64_t pos = avio_tell(pb);
2661  avio_wb32(pb, 0); /* size */
2662  ffio_wfourcc(pb, "dinf");
2663  mov_write_dref_tag(pb);
2664  return update_size(pb, pos);
2665 }
2666 
2667 static int mov_write_nmhd_tag(AVIOContext *pb)
2668 {
2669  avio_wb32(pb, 12);
2670  ffio_wfourcc(pb, "nmhd");
2671  avio_wb32(pb, 0);
2672  return 12;
2673 }
2674 
2675 static int mov_write_sthd_tag(AVIOContext *pb)
2676 {
2677  avio_wb32(pb, 12);
2678  ffio_wfourcc(pb, "sthd");
2679  avio_wb32(pb, 0);
2680  return 12;
2681 }
2682 
2683 static int mov_write_tcmi_tag(AVIOContext *pb, MOVTrack *track)
2684 {
2685  int64_t pos = avio_tell(pb);
2686  const char *font = "Lucida Grande";
2687  avio_wb32(pb, 0); /* size */
2688  ffio_wfourcc(pb, "tcmi"); /* timecode media information atom */
2689  avio_wb32(pb, 0); /* version & flags */
2690  avio_wb16(pb, 0); /* text font */
2691  avio_wb16(pb, 0); /* text face */
2692  avio_wb16(pb, 12); /* text size */
2693  avio_wb16(pb, 0); /* (unknown, not in the QT specs...) */
2694  avio_wb16(pb, 0x0000); /* text color (red) */
2695  avio_wb16(pb, 0x0000); /* text color (green) */
2696  avio_wb16(pb, 0x0000); /* text color (blue) */
2697  avio_wb16(pb, 0xffff); /* background color (red) */
2698  avio_wb16(pb, 0xffff); /* background color (green) */
2699  avio_wb16(pb, 0xffff); /* background color (blue) */
2700  avio_w8(pb, strlen(font)); /* font len (part of the pascal string) */
2701  avio_write(pb, font, strlen(font)); /* font name */
2702  return update_size(pb, pos);
2703 }
2704 
2705 static int mov_write_gmhd_tag(AVIOContext *pb, MOVTrack *track)
2706 {
2707  int64_t pos = avio_tell(pb);
2708  avio_wb32(pb, 0); /* size */
2709  ffio_wfourcc(pb, "gmhd");
2710  avio_wb32(pb, 0x18); /* gmin size */
2711  ffio_wfourcc(pb, "gmin");/* generic media info */
2712  avio_wb32(pb, 0); /* version & flags */
2713  avio_wb16(pb, 0x40); /* graphics mode = */
2714  avio_wb16(pb, 0x8000); /* opColor (r?) */
2715  avio_wb16(pb, 0x8000); /* opColor (g?) */
2716  avio_wb16(pb, 0x8000); /* opColor (b?) */
2717  avio_wb16(pb, 0); /* balance */
2718  avio_wb16(pb, 0); /* reserved */
2719 
2720  /*
2721  * This special text atom is required for
2722  * Apple Quicktime chapters. The contents
2723  * don't appear to be documented, so the
2724  * bytes are copied verbatim.
2725  */
2726  if (track->tag != MKTAG('c','6','0','8')) {
2727  avio_wb32(pb, 0x2C); /* size */
2728  ffio_wfourcc(pb, "text");
2729  avio_wb16(pb, 0x01);
2730  avio_wb32(pb, 0x00);
2731  avio_wb32(pb, 0x00);
2732  avio_wb32(pb, 0x00);
2733  avio_wb32(pb, 0x01);
2734  avio_wb32(pb, 0x00);
2735  avio_wb32(pb, 0x00);
2736  avio_wb32(pb, 0x00);
2737  avio_wb32(pb, 0x00004000);
2738  avio_wb16(pb, 0x0000);
2739  }
2740 
2741  if (track->par->codec_tag == MKTAG('t','m','c','d')) {
2742  int64_t tmcd_pos = avio_tell(pb);
2743  avio_wb32(pb, 0); /* size */
2744  ffio_wfourcc(pb, "tmcd");
2745  mov_write_tcmi_tag(pb, track);
2746  update_size(pb, tmcd_pos);
2747  } else if (track->par->codec_tag == MKTAG('g','p','m','d')) {
2748  int64_t gpmd_pos = avio_tell(pb);
2749  avio_wb32(pb, 0); /* size */
2750  ffio_wfourcc(pb, "gpmd");
2751  avio_wb32(pb, 0); /* version */
2752  update_size(pb, gpmd_pos);
2753  }
2754  return update_size(pb, pos);
2755 }
2756 
2757 static int mov_write_smhd_tag(AVIOContext *pb)
2758 {
2759  avio_wb32(pb, 16); /* size */
2760  ffio_wfourcc(pb, "smhd");
2761  avio_wb32(pb, 0); /* version & flags */
2762  avio_wb16(pb, 0); /* reserved (balance, normally = 0) */
2763  avio_wb16(pb, 0); /* reserved */
2764  return 16;
2765 }
2766 
2767 static int mov_write_vmhd_tag(AVIOContext *pb)
2768 {
2769  avio_wb32(pb, 0x14); /* size (always 0x14) */
2770  ffio_wfourcc(pb, "vmhd");
2771  avio_wb32(pb, 0x01); /* version & flags */
2772  avio_wb64(pb, 0); /* reserved (graphics mode = copy) */
2773  return 0x14;
2774 }
2775 
2776 static int is_clcp_track(MOVTrack *track)
2777 {
2778  return track->tag == MKTAG('c','7','0','8') ||
2779  track->tag == MKTAG('c','6','0','8');
2780 }
2781 
2782 static int mov_write_hdlr_tag(AVFormatContext *s, AVIOContext *pb, MOVTrack *track)
2783 {
2784  MOVMuxContext *mov = s->priv_data;
2785  const char *hdlr, *descr = NULL, *hdlr_type = NULL;
2786  int64_t pos = avio_tell(pb);
2787  size_t descr_len;
2788 
2789  hdlr = "dhlr";
2790  hdlr_type = "url ";
2791  descr = "DataHandler";
2792 
2793  if (track) {
2794  hdlr = (track->mode == MODE_MOV) ? "mhlr" : "\0\0\0\0";
2795  if (track->par->codec_type == AVMEDIA_TYPE_VIDEO) {
2796  hdlr_type = "vide";
2797  descr = "VideoHandler";
2798  } else if (track->par->codec_type == AVMEDIA_TYPE_AUDIO) {
2799  hdlr_type = "soun";
2800  descr = "SoundHandler";
2801  } else if (track->par->codec_type == AVMEDIA_TYPE_SUBTITLE) {
2802  if (is_clcp_track(track)) {
2803  hdlr_type = "clcp";
2804  descr = "ClosedCaptionHandler";
2805  } else {
2806  if (track->tag == MKTAG('t','x','3','g')) {
2807  hdlr_type = "sbtl";
2808  } else if (track->tag == MKTAG('m','p','4','s')) {
2809  hdlr_type = "subp";
2810  } else if (track->tag == MOV_MP4_TTML_TAG) {
2811  hdlr_type = "subt";
2812  } else {
2813  hdlr_type = "text";
2814  }
2815  descr = "SubtitleHandler";
2816  }
2817  } else if (track->par->codec_tag == MKTAG('r','t','p',' ')) {
2818  hdlr_type = "hint";
2819  descr = "HintHandler";
2820  } else if (track->par->codec_tag == MKTAG('t','m','c','d')) {
2821  hdlr_type = "tmcd";
2822  descr = "TimeCodeHandler";
2823  } else if (track->par->codec_tag == MKTAG('g','p','m','d')) {
2824  hdlr_type = "meta";
2825  descr = "GoPro MET"; // GoPro Metadata
2826  } else {
2827  av_log(s, AV_LOG_WARNING,
2828  "Unknown hdlr_type for %s, writing dummy values\n",
2829  av_fourcc2str(track->par->codec_tag));
2830  }
2831  if (track->st) {
2832  // hdlr.name is used by some players to identify the content title
2833  // of the track. So if an alternate handler description is
2834  // specified, use it.
2835  AVDictionaryEntry *t;
2836  t = av_dict_get(track->st->metadata, "handler_name", NULL, 0);
2837  if (t && utf8len(t->value))
2838  descr = t->value;
2839  }
2840  }
2841 
2842  if (mov->empty_hdlr_name) /* expressly allowed by QTFF and not prohibited in ISO 14496-12 8.4.3.3 */
2843  descr = "";
2844 
2845  avio_wb32(pb, 0); /* size */
2846  ffio_wfourcc(pb, "hdlr");
2847  avio_wb32(pb, 0); /* Version & flags */
2848  avio_write(pb, hdlr, 4); /* handler */
2849  ffio_wfourcc(pb, hdlr_type); /* handler type */
2850  avio_wb32(pb, 0); /* reserved */
2851  avio_wb32(pb, 0); /* reserved */
2852  avio_wb32(pb, 0); /* reserved */
2853  descr_len = strlen(descr);
2854  if (!track || track->mode == MODE_MOV)
2855  avio_w8(pb, descr_len); /* pascal string */
2856  avio_write(pb, descr, descr_len); /* handler description */
2857  if (track && track->mode != MODE_MOV)
2858  avio_w8(pb, 0); /* c string */
2859  return update_size(pb, pos);
2860 }
2861 
2862 static int mov_write_hmhd_tag(AVIOContext *pb)
2863 {
2864  /* This atom must be present, but leaving the values at zero
2865  * seems harmless. */
2866  avio_wb32(pb, 28); /* size */
2867  ffio_wfourcc(pb, "hmhd");
2868  avio_wb32(pb, 0); /* version, flags */
2869  avio_wb16(pb, 0); /* maxPDUsize */
2870  avio_wb16(pb, 0); /* avgPDUsize */
2871  avio_wb32(pb, 0); /* maxbitrate */
2872  avio_wb32(pb, 0); /* avgbitrate */
2873  avio_wb32(pb, 0); /* reserved */
2874  return 28;
2875 }
2876 
2877 static int mov_write_minf_tag(AVFormatContext *s, AVIOContext *pb, MOVMuxContext *mov, MOVTrack *track)
2878 {
2879  int64_t pos = avio_tell(pb);
2880  int ret;
2881 
2882  avio_wb32(pb, 0); /* size */
2883  ffio_wfourcc(pb, "minf");
2884  if (track->par->codec_type == AVMEDIA_TYPE_VIDEO)
2885  mov_write_vmhd_tag(pb);
2886  else if (track->par->codec_type == AVMEDIA_TYPE_AUDIO)
2887  mov_write_smhd_tag(pb);
2888  else if (track->par->codec_type == AVMEDIA_TYPE_SUBTITLE) {
2889  if (track->tag == MKTAG('t','e','x','t') || is_clcp_track(track)) {
2890  mov_write_gmhd_tag(pb, track);
2891  } else if (track->tag == MOV_MP4_TTML_TAG) {
2892  mov_write_sthd_tag(pb);
2893  } else {
2894  mov_write_nmhd_tag(pb);
2895  }
2896  } else if (track->tag == MKTAG('r','t','p',' ')) {
2897  mov_write_hmhd_tag(pb);
2898  } else if (track->tag == MKTAG('t','m','c','d')) {
2899  if (track->mode != MODE_MOV)
2900  mov_write_nmhd_tag(pb);
2901  else
2902  mov_write_gmhd_tag(pb, track);
2903  } else if (track->tag == MKTAG('g','p','m','d')) {
2904  mov_write_gmhd_tag(pb, track);
2905  }
2906  if (track->mode == MODE_MOV) /* ISO 14496-12 8.4.3.1 specifies hdlr only within mdia or meta boxes */
2907  mov_write_hdlr_tag(s, pb, NULL);
2908  mov_write_dinf_tag(pb);
2909  if ((ret = mov_write_stbl_tag(s, pb, mov, track)) < 0)
2910  return ret;
2911  return update_size(pb, pos);
2912 }
2913 
2914 static void get_pts_range(MOVMuxContext *mov, MOVTrack *track,
2915  int64_t *start, int64_t *end)
2916 {
2917  if (track->tag == MKTAG('t','m','c','d') && mov->nb_meta_tmcd) {
2918  // tmcd tracks gets track_duration set in mov_write_moov_tag from
2919  // another track's duration, while the end_pts may be left at zero.
2920  // Calculate the pts duration for that track instead.
2921  get_pts_range(mov, &mov->tracks[track->src_track], start, end);
2922  *start = av_rescale(*start, track->timescale,
2923  mov->tracks[track->src_track].timescale);
2924  *end = av_rescale(*end, track->timescale,
2925  mov->tracks[track->src_track].timescale);
2926  return;
2927  }
2928  if (track->end_pts != AV_NOPTS_VALUE &&
2929  track->start_dts != AV_NOPTS_VALUE &&
2930  track->start_cts != AV_NOPTS_VALUE) {
2931  *start = track->start_dts + track->start_cts;
2932  *end = track->end_pts;
2933  return;
2934  }
2935  *start = 0;
2936  *end = track->track_duration;
2937 }
2938 
2939 static int64_t calc_samples_pts_duration(MOVMuxContext *mov, MOVTrack *track)
2940 {
2941  int64_t start, end;
2942  get_pts_range(mov, track, &start, &end);
2943  return end - start;
2944 }
2945 
2946 // Calculate the actual duration of the track, after edits.
2947 // If it starts with a pts < 0, that is removed by the edit list.
2948 // If it starts with a pts > 0, the edit list adds a delay before that.
2949 // Thus, with edit lists enabled, the post-edit output of the file is
2950 // starting with pts=0.
2951 static int64_t calc_pts_duration(MOVMuxContext *mov, MOVTrack *track)
2952 {
2953  int64_t start, end;
2954  get_pts_range(mov, track, &start, &end);
2955  if (mov->use_editlist != 0)
2956  start = 0;
2957  return end - start;
2958 }
2959 
2960 static int mov_write_mdhd_tag(AVIOContext *pb, MOVMuxContext *mov,
2961  MOVTrack *track)
2962 {
2963  int64_t duration = calc_samples_pts_duration(mov, track);
2964  int version = duration < INT32_MAX ? 0 : 1;
2965 
2966  if (track->mode == MODE_ISM)
2967  version = 1;
2968 
2969  (version == 1) ? avio_wb32(pb, 44) : avio_wb32(pb, 32); /* size */
2970  ffio_wfourcc(pb, "mdhd");
2971  avio_w8(pb, version);
2972  avio_wb24(pb, 0); /* flags */
2973  if (version == 1) {
2974  avio_wb64(pb, track->time);
2975  avio_wb64(pb, track->time);
2976  } else {
2977  avio_wb32(pb, track->time); /* creation time */
2978  avio_wb32(pb, track->time); /* modification time */
2979  }
2980  avio_wb32(pb, track->timescale); /* time scale (sample rate for audio) */
2981  if (!track->entry && mov->mode == MODE_ISM)
2982  (version == 1) ? avio_wb64(pb, UINT64_C(0xffffffffffffffff)) : avio_wb32(pb, 0xffffffff);
2983  else if (!track->entry)
2984  (version == 1) ? avio_wb64(pb, 0) : avio_wb32(pb, 0);
2985  else
2986  (version == 1) ? avio_wb64(pb, duration) : avio_wb32(pb, duration); /* duration */
2987  avio_wb16(pb, track->language); /* language */
2988  avio_wb16(pb, 0); /* reserved (quality) */
2989 
2990  if (version != 0 && track->mode == MODE_MOV) {
2991  av_log(NULL, AV_LOG_ERROR,
2992  "FATAL error, file duration too long for timebase, this file will not be\n"
2993  "playable with QuickTime. Choose a different timebase with "
2994  "-video_track_timescale or a different container format\n");
2995  }
2996 
2997  return 32;
2998 }
2999 
3000 static int mov_write_mdia_tag(AVFormatContext *s, AVIOContext *pb,
3001  MOVMuxContext *mov, MOVTrack *track)
3002 {
3003  int64_t pos = avio_tell(pb);
3004  int ret;
3005 
3006  avio_wb32(pb, 0); /* size */
3007  ffio_wfourcc(pb, "mdia");
3008  mov_write_mdhd_tag(pb, mov, track);
3009  mov_write_hdlr_tag(s, pb, track);
3010  if ((ret = mov_write_minf_tag(s, pb, mov, track)) < 0)
3011  return ret;
3012  return update_size(pb, pos);
3013 }
3014 
3015 /* transformation matrix
3016  |a b u|
3017  |c d v|
3018  |tx ty w| */
3019 static void write_matrix(AVIOContext *pb, int16_t a, int16_t b, int16_t c,
3020  int16_t d, int16_t tx, int16_t ty)
3021 {
3022  avio_wb32(pb, a << 16); /* 16.16 format */
3023  avio_wb32(pb, b << 16); /* 16.16 format */
3024  avio_wb32(pb, 0); /* u in 2.30 format */
3025  avio_wb32(pb, c << 16); /* 16.16 format */
3026  avio_wb32(pb, d << 16); /* 16.16 format */
3027  avio_wb32(pb, 0); /* v in 2.30 format */
3028  avio_wb32(pb, tx << 16); /* 16.16 format */
3029  avio_wb32(pb, ty << 16); /* 16.16 format */
3030  avio_wb32(pb, 1 << 30); /* w in 2.30 format */
3031 }
3032 
3033 static int mov_write_tkhd_tag(AVIOContext *pb, MOVMuxContext *mov,
3034  MOVTrack *track, AVStream *st)
3035 {
3036  int64_t duration = av_rescale_rnd(calc_pts_duration(mov, track),
3037  mov->movie_timescale, track->timescale,
3038  AV_ROUND_UP);
3039  int version = duration < INT32_MAX ? 0 : 1;
3040  int flags = MOV_TKHD_FLAG_IN_MOVIE;
3041  int group = 0;
3042 
3043  uint32_t *display_matrix = NULL;
3044  size_t display_matrix_size;
3045  int i;
3046 
3047  if (st) {
3048  if (mov->per_stream_grouping)
3049  group = st->index;
3050  else
3051  group = st->codecpar->codec_type;
3052 
3053  display_matrix = (uint32_t*)av_stream_get_side_data(st, AV_PKT_DATA_DISPLAYMATRIX,
3054  &display_matrix_size);
3055  if (display_matrix && display_matrix_size < 9 * sizeof(*display_matrix))
3056  display_matrix = NULL;
3057  }
3058 
3059  if (track->flags & MOV_TRACK_ENABLED)
3060  flags |= MOV_TKHD_FLAG_ENABLED;
3061 
3062  if (track->mode == MODE_ISM)
3063  version = 1;
3064 
3065  (version == 1) ? avio_wb32(pb, 104) : avio_wb32(pb, 92); /* size */
3066  ffio_wfourcc(pb, "tkhd");
3067  avio_w8(pb, version);
3068  avio_wb24(pb, flags);
3069  if (version == 1) {
3070  avio_wb64(pb, track->time);
3071  avio_wb64(pb, track->time);
3072  } else {
3073  avio_wb32(pb, track->time); /* creation time */
3074  avio_wb32(pb, track->time); /* modification time */
3075  }
3076  avio_wb32(pb, track->track_id); /* track-id */
3077  avio_wb32(pb, 0); /* reserved */
3078  if (!track->entry && mov->mode == MODE_ISM)
3079  (version == 1) ? avio_wb64(pb, UINT64_C(0xffffffffffffffff)) : avio_wb32(pb, 0xffffffff);
3080  else if (!track->entry)
3081  (version == 1) ? avio_wb64(pb, 0) : avio_wb32(pb, 0);
3082  else
3083  (version == 1) ? avio_wb64(pb, duration) : avio_wb32(pb, duration);
3084 
3085  avio_wb32(pb, 0); /* reserved */
3086  avio_wb32(pb, 0); /* reserved */
3087  avio_wb16(pb, 0); /* layer */
3088  avio_wb16(pb, group); /* alternate group) */
3089  /* Volume, only for audio */
3090  if (track->par->codec_type == AVMEDIA_TYPE_AUDIO)
3091  avio_wb16(pb, 0x0100);
3092  else
3093  avio_wb16(pb, 0);
3094  avio_wb16(pb, 0); /* reserved */
3095 
3096  /* Matrix structure */
3097  if (display_matrix) {
3098  for (i = 0; i < 9; i++)
3099  avio_wb32(pb, display_matrix[i]);
3100  } else {
3101  write_matrix(pb, 1, 0, 0, 1, 0, 0);
3102  }
3103  /* Track width and height, for visual only */
3104  if (st && (track->par->codec_type == AVMEDIA_TYPE_VIDEO ||
3105  track->par->codec_type == AVMEDIA_TYPE_SUBTITLE)) {
3106  int64_t track_width_1616;
3107  if (track->mode == MODE_MOV) {
3108  track_width_1616 = track->par->width * 0x10000ULL;
3109  } else {
3110  track_width_1616 = av_rescale(st->sample_aspect_ratio.num,
3111  track->par->width * 0x10000LL,
3112  st->sample_aspect_ratio.den);
3113  if (!track_width_1616 ||
3114  track->height != track->par->height ||
3115  track_width_1616 > UINT32_MAX)
3116  track_width_1616 = track->par->width * 0x10000ULL;
3117  }
3118  if (track_width_1616 > UINT32_MAX) {
3119  av_log(mov->fc, AV_LOG_WARNING, "track width is too large\n");
3120  track_width_1616 = 0;
3121  }
3122  avio_wb32(pb, track_width_1616);
3123  if (track->height > 0xFFFF) {
3124  av_log(mov->fc, AV_LOG_WARNING, "track height is too large\n");
3125  avio_wb32(pb, 0);
3126  } else
3127  avio_wb32(pb, track->height * 0x10000U);
3128  } else {
3129  avio_wb32(pb, 0);
3130  avio_wb32(pb, 0);
3131  }
3132  return 0x5c;
3133 }
3134 
3135 static int mov_write_tapt_tag(AVIOContext *pb, MOVTrack *track)
3136 {
3137  int32_t width = av_rescale(track->par->sample_aspect_ratio.num, track->par->width,
3138  track->par->sample_aspect_ratio.den);
3139 
3140  int64_t pos = avio_tell(pb);
3141 
3142  avio_wb32(pb, 0); /* size */
3143  ffio_wfourcc(pb, "tapt");
3144 
3145  avio_wb32(pb, 20);
3146  ffio_wfourcc(pb, "clef");
3147  avio_wb32(pb, 0);
3148  avio_wb32(pb, width << 16);
3149  avio_wb32(pb, track->par->height << 16);
3150 
3151  avio_wb32(pb, 20);
3152  ffio_wfourcc(pb, "prof");
3153  avio_wb32(pb, 0);
3154  avio_wb32(pb, width << 16);
3155  avio_wb32(pb, track->par->height << 16);
3156 
3157  avio_wb32(pb, 20);
3158  ffio_wfourcc(pb, "enof");
3159  avio_wb32(pb, 0);
3160  avio_wb32(pb, track->par->width << 16);
3161  avio_wb32(pb, track->par->height << 16);
3162 
3163  return update_size(pb, pos);
3164 }
3165 
3166 // This box seems important for the psp playback ... without it the movie seems to hang
3167 static int mov_write_edts_tag(AVIOContext *pb, MOVMuxContext *mov,
3168  MOVTrack *track)
3169 {
3170  int64_t duration = av_rescale_rnd(calc_samples_pts_duration(mov, track),
3171  mov->movie_timescale, track->timescale,
3172  AV_ROUND_UP);
3173  int version = duration < INT32_MAX ? 0 : 1;
3174  int entry_size, entry_count, size;
3175  int64_t delay, start_ct = track->start_cts;
3176  int64_t start_dts = track->start_dts;
3177 
3178  if (track->entry) {
3179  if (start_dts != track->cluster[0].dts || start_ct != track->cluster[0].cts) {
3180 
3181  av_log(mov->fc, AV_LOG_DEBUG,
3182  "EDTS using dts:%"PRId64" cts:%d instead of dts:%"PRId64" cts:%"PRId64" tid:%d\n",
3183  track->cluster[0].dts, track->cluster[0].cts,
3184  start_dts, start_ct, track->track_id);
3185  start_dts = track->cluster[0].dts;
3186  start_ct = track->cluster[0].cts;
3187  }
3188  }
3189 
3190  delay = av_rescale_rnd(start_dts + start_ct, mov->movie_timescale,
3191  track->timescale, AV_ROUND_DOWN);
3192  version |= delay < INT32_MAX ? 0 : 1;
3193 
3194  entry_size = (version == 1) ? 20 : 12;
3195  entry_count = 1 + (delay > 0);
3196  size = 24 + entry_count * entry_size;
3197 
3198  /* write the atom data */
3199  avio_wb32(pb, size);
3200  ffio_wfourcc(pb, "edts");
3201  avio_wb32(pb, size - 8);
3202  ffio_wfourcc(pb, "elst");
3203  avio_w8(pb, version);
3204  avio_wb24(pb, 0); /* flags */
3205 
3206  avio_wb32(pb, entry_count);
3207  if (delay > 0) { /* add an empty edit to delay presentation */
3208  /* In the positive delay case, the delay includes the cts
3209  * offset, and the second edit list entry below trims out
3210  * the same amount from the actual content. This makes sure
3211  * that the offset last sample is included in the edit
3212  * list duration as well. */
3213  if (version == 1) {
3214  avio_wb64(pb, delay);
3215  avio_wb64(pb, -1);
3216  } else {
3217  avio_wb32(pb, delay);
3218  avio_wb32(pb, -1);
3219  }
3220  avio_wb32(pb, 0x00010000);
3221  } else {
3222  /* Avoid accidentally ending up with start_ct = -1 which has got a
3223  * special meaning. Normally start_ct should end up positive or zero
3224  * here, but use FFMIN in case dts is a small positive integer
3225  * rounded to 0 when represented in movie timescale units. */
3226  av_assert0(av_rescale_rnd(start_dts, mov->movie_timescale, track->timescale, AV_ROUND_DOWN) <= 0);
3227  start_ct = -FFMIN(start_dts, 0);
3228  /* Note, this delay is calculated from the pts of the first sample,
3229  * ensuring that we don't reduce the duration for cases with
3230  * dts<0 pts=0. */
3231  duration += delay;
3232  }
3233 
3234  /* For fragmented files, we don't know the full length yet. Setting
3235  * duration to 0 allows us to only specify the offset, including
3236  * the rest of the content (from all future fragments) without specifying
3237  * an explicit duration. */
3238  if (mov->flags & FF_MOV_FLAG_FRAGMENT)
3239  duration = 0;
3240 
3241  /* duration */
3242  if (version == 1) {
3243  avio_wb64(pb, duration);
3244  avio_wb64(pb, start_ct);
3245  } else {
3246  avio_wb32(pb, duration);
3247  avio_wb32(pb, start_ct);
3248  }
3249  avio_wb32(pb, 0x00010000);
3250  return size;
3251 }
3252 
3253 static int mov_write_tref_tag(AVIOContext *pb, MOVTrack *track)
3254 {
3255  avio_wb32(pb, 20); // size
3256  ffio_wfourcc(pb, "tref");
3257  avio_wb32(pb, 12); // size (subatom)
3258  avio_wl32(pb, track->tref_tag);
3259  avio_wb32(pb, track->tref_id);
3260  return 20;
3261 }
3262 
3263 // goes at the end of each track! ... Critical for PSP playback ("Incompatible data" without it)
3264 static int mov_write_uuid_tag_psp(AVIOContext *pb, MOVTrack *mov)
3265 {
3266  avio_wb32(pb, 0x34); /* size ... reports as 28 in mp4box! */
3267  ffio_wfourcc(pb, "uuid");
3268  ffio_wfourcc(pb, "USMT");
3269  avio_wb32(pb, 0x21d24fce);
3270  avio_wb32(pb, 0xbb88695c);
3271  avio_wb32(pb, 0xfac9c740);
3272  avio_wb32(pb, 0x1c); // another size here!
3273  ffio_wfourcc(pb, "MTDT");
3274  avio_wb32(pb, 0x00010012);
3275  avio_wb32(pb, 0x0a);
3276  avio_wb32(pb, 0x55c40000);
3277  avio_wb32(pb, 0x1);
3278  avio_wb32(pb, 0x0);
3279  return 0x34;
3280 }
3281 
3282 static int mov_write_udta_sdp(AVIOContext *pb, MOVTrack *track)
3283 {
3284  AVFormatContext *ctx = track->rtp_ctx;
3285  char buf[1000] = "";
3286  int len;
3287 
3288  ff_sdp_write_media(buf, sizeof(buf), ctx->streams[0], track->src_track,
3289  NULL, NULL, 0, 0, ctx);
3290  av_strlcatf(buf, sizeof(buf), "a=control:streamid=%d\r\n", track->track_id);
3291  len = strlen(buf);
3292 
3293  avio_wb32(pb, len + 24);
3294  ffio_wfourcc(pb, "udta");
3295  avio_wb32(pb, len + 16);
3296  ffio_wfourcc(pb, "hnti");
3297  avio_wb32(pb, len + 8);
3298  ffio_wfourcc(pb, "sdp ");
3299  avio_write(pb, buf, len);
3300  return len + 24;
3301 }
3302 
3303 static int mov_write_track_metadata(AVIOContext *pb, AVStream *st,
3304  const char *tag, const char *str)
3305 {
3306  int64_t pos = avio_tell(pb);
3307  AVDictionaryEntry *t = av_dict_get(st->metadata, str, NULL, 0);
3308  if (!t || !utf8len(t->value))
3309  return 0;
3310 
3311  avio_wb32(pb, 0); /* size */
3312  ffio_wfourcc(pb, tag); /* type */
3313  avio_write(pb, t->value, strlen(t->value)); /* UTF8 string value */
3314  return update_size(pb, pos);
3315 }
3316 
3317 static int mov_write_track_kind(AVIOContext *pb, const char *scheme_uri,
3318  const char *value)
3319 {
3320  int64_t pos = avio_tell(pb);
3321 
3322  /* Box|FullBox basics */
3323  avio_wb32(pb, 0); /* size placeholder */
3324  ffio_wfourcc(pb, (const unsigned char *)"kind");
3325  avio_w8(pb, 0); /* version = 0 */
3326  avio_wb24(pb, 0); /* flags = 0 */
3327 
3328  /* Required null-terminated scheme URI */
3329  avio_write(pb, (const unsigned char *)scheme_uri,
3330  strlen(scheme_uri));
3331  avio_w8(pb, 0);
3332 
3333  /* Optional value string */
3334  if (value && value[0])
3335  avio_write(pb, (const unsigned char *)value,
3336  strlen(value));
3337 
3338  avio_w8(pb, 0);
3339 
3340  return update_size(pb, pos);
3341 }
3342 
3343 static int mov_write_track_kinds(AVIOContext *pb, AVStream *st)
3344 {
3345  int ret = AVERROR_BUG;
3346 
3347  for (int i = 0; ff_mov_track_kind_table[i].scheme_uri; i++) {
3348  const struct MP4TrackKindMapping map = ff_mov_track_kind_table[i];
3349 
3350  for (int j = 0; map.value_maps[j].disposition; j++) {
3351  const struct MP4TrackKindValueMapping value_map = map.value_maps[j];
3352  if (!(st->disposition & value_map.disposition))
3353  continue;
3354 
3355  if ((ret = mov_write_track_kind(pb, map.scheme_uri, value_map.value)) < 0)
3356  return ret;
3357  }
3358  }
3359 
3360  return 0;
3361 }
3362 
3363 static int mov_write_track_udta_tag(AVIOContext *pb, MOVMuxContext *mov,
3364  AVStream *st)
3365 {
3366  AVIOContext *pb_buf;
3367  int ret, size;
3368  uint8_t *buf;
3369 
3370  if (!st)
3371  return 0;
3372 
3373  ret = avio_open_dyn_buf(&pb_buf);
3374  if (ret < 0)
3375  return ret;
3376 
3377  if (mov->mode & (MODE_MP4|MODE_MOV))
3378  mov_write_track_metadata(pb_buf, st, "name", "title");
3379 
3380  if (mov->mode & MODE_MP4) {
3381  if ((ret = mov_write_track_kinds(pb_buf, st)) < 0)
3382  return ret;
3383  }
3384 
3385  if ((size = avio_get_dyn_buf(pb_buf, &buf)) > 0) {
3386  avio_wb32(pb, size + 8);
3387  ffio_wfourcc(pb, "udta");
3388  avio_write(pb, buf, size);
3389  }
3390  ffio_free_dyn_buf(&pb_buf);
3391 
3392  return 0;
3393 }
3394 
3395 static int mov_write_trak_tag(AVFormatContext *s, AVIOContext *pb, MOVMuxContext *mov,
3396  MOVTrack *track, AVStream *st)
3397 {
3398  int64_t pos = avio_tell(pb);
3399  int entry_backup = track->entry;
3400  int chunk_backup = track->chunkCount;
3401  int ret;
3402 
3403  /* If we want to have an empty moov, but some samples already have been
3404  * buffered (delay_moov), pretend that no samples have been written yet. */
3405  if (mov->flags & FF_MOV_FLAG_EMPTY_MOOV)
3406  track->chunkCount = track->entry = 0;
3407 
3408  avio_wb32(pb, 0); /* size */
3409  ffio_wfourcc(pb, "trak");
3410  mov_write_tkhd_tag(pb, mov, track, st);
3411 
3412  av_assert2(mov->use_editlist >= 0);
3413 
3414  if (track->start_dts != AV_NOPTS_VALUE) {
3415  if (mov->use_editlist)
3416  mov_write_edts_tag(pb, mov, track); // PSP Movies and several other cases require edts box
3417  else if ((track->entry && track->cluster[0].dts) || track->mode == MODE_PSP || is_clcp_track(track))
3418  av_log(mov->fc, AV_LOG_WARNING,
3419  "Not writing any edit list even though one would have been required\n");
3420  }
3421 
3422  if (track->tref_tag)
3423  mov_write_tref_tag(pb, track);
3424 
3425  if ((ret = mov_write_mdia_tag(s, pb, mov, track)) < 0)
3426  return ret;
3427  if (track->mode == MODE_PSP)
3428  mov_write_uuid_tag_psp(pb, track); // PSP Movies require this uuid box
3429  if (track->tag == MKTAG('r','t','p',' '))
3430  mov_write_udta_sdp(pb, track);
3431  if (track->mode == MODE_MOV) {
3432  if (track->par->codec_type == AVMEDIA_TYPE_VIDEO) {
3433  double sample_aspect_ratio = av_q2d(st->sample_aspect_ratio);
3434  if (st->sample_aspect_ratio.num && 1.0 != sample_aspect_ratio) {
3435  mov_write_tapt_tag(pb, track);
3436  }
3437  }
3438  if (is_clcp_track(track) && st->sample_aspect_ratio.num) {
3439  mov_write_tapt_tag(pb, track);
3440  }
3441  }
3442  mov_write_track_udta_tag(pb, mov, st);
3443  track->entry = entry_backup;
3444  track->chunkCount = chunk_backup;
3445  return update_size(pb, pos);
3446 }
3447 
3448 static int mov_write_iods_tag(AVIOContext *pb, MOVMuxContext *mov)
3449 {
3450  int i, has_audio = 0, has_video = 0;
3451  int64_t pos = avio_tell(pb);
3452  int audio_profile = mov->iods_audio_profile;
3453  int video_profile = mov->iods_video_profile;
3454  for (i = 0; i < mov->nb_streams; i++) {
3455  if (mov->tracks[i].entry > 0 || mov->flags & FF_MOV_FLAG_EMPTY_MOOV) {
3456  has_audio |= mov->tracks[i].par->codec_type == AVMEDIA_TYPE_AUDIO;
3457  has_video |= mov->tracks[i].par->codec_type == AVMEDIA_TYPE_VIDEO;
3458  }
3459  }
3460  if (audio_profile < 0)
3461  audio_profile = 0xFF - has_audio;
3462  if (video_profile < 0)
3463  video_profile = 0xFF - has_video;
3464  avio_wb32(pb, 0x0); /* size */
3465  ffio_wfourcc(pb, "iods");
3466  avio_wb32(pb, 0); /* version & flags */
3467  put_descr(pb, 0x10, 7);
3468  avio_wb16(pb, 0x004f);
3469  avio_w8(pb, 0xff);
3470  avio_w8(pb, 0xff);
3471  avio_w8(pb, audio_profile);
3472  avio_w8(pb, video_profile);
3473  avio_w8(pb, 0xff);
3474  return update_size(pb, pos);
3475 }
3476 
3477 static int mov_write_trex_tag(AVIOContext *pb, MOVTrack *track)
3478 {
3479  avio_wb32(pb, 0x20); /* size */
3480  ffio_wfourcc(pb, "trex");
3481  avio_wb32(pb, 0); /* version & flags */
3482  avio_wb32(pb, track->track_id); /* track ID */
3483  avio_wb32(pb, 1); /* default sample description index */
3484  avio_wb32(pb, 0); /* default sample duration */
3485  avio_wb32(pb, 0); /* default sample size */
3486  avio_wb32(pb, 0); /* default sample flags */
3487  return 0;
3488 }
3489 
3490 static int mov_write_mvex_tag(AVIOContext *pb, MOVMuxContext *mov)
3491 {
3492  int64_t pos = avio_tell(pb);
3493  int i;
3494  avio_wb32(pb, 0x0); /* size */
3495  ffio_wfourcc(pb, "mvex");
3496  for (i = 0; i < mov->nb_streams; i++)
3497  mov_write_trex_tag(pb, &mov->tracks[i]);
3498  return update_size(pb, pos);
3499 }
3500 
3501 static int mov_write_mvhd_tag(AVIOContext *pb, MOVMuxContext *mov)
3502 {
3503  int max_track_id = 1, i;
3504  int64_t max_track_len = 0;
3505  int version;
3506 
3507  for (i = 0; i < mov->nb_streams; i++) {
3508  if (mov->tracks[i].entry > 0 && mov->tracks[i].timescale) {
3509  int64_t max_track_len_temp = av_rescale_rnd(
3510  calc_pts_duration(mov, &mov->tracks[i]),
3511  mov->movie_timescale,
3512  mov->tracks[i].timescale,
3513  AV_ROUND_UP);
3514  if (max_track_len < max_track_len_temp)
3515  max_track_len = max_track_len_temp;
3516  if (max_track_id < mov->tracks[i].track_id)
3517  max_track_id = mov->tracks[i].track_id;
3518  }
3519  }
3520  /* If using delay_moov, make sure the output is the same as if no
3521  * samples had been written yet. */
3522  if (mov->flags & FF_MOV_FLAG_EMPTY_MOOV) {
3523  max_track_len = 0;
3524  max_track_id = 1;
3525  }
3526 
3527  version = max_track_len < UINT32_MAX ? 0 : 1;
3528  avio_wb32(pb, version == 1 ? 120 : 108); /* size */
3529 
3530  ffio_wfourcc(pb, "mvhd");
3531  avio_w8(pb, version);
3532  avio_wb24(pb, 0); /* flags */
3533  if (version == 1) {
3534  avio_wb64(pb, mov->time);
3535  avio_wb64(pb, mov->time);
3536  } else {
3537  avio_wb32(pb, mov->time); /* creation time */
3538  avio_wb32(pb, mov->time); /* modification time */
3539  }
3540  avio_wb32(pb, mov->movie_timescale);
3541  (version == 1) ? avio_wb64(pb, max_track_len) : avio_wb32(pb, max_track_len); /* duration of longest track */
3542 
3543  avio_wb32(pb, 0x00010000); /* reserved (preferred rate) 1.0 = normal */
3544  avio_wb16(pb, 0x0100); /* reserved (preferred volume) 1.0 = normal */
3545  ffio_fill(pb, 0, 2 + 2 * 4); /* reserved */
3546 
3547  /* Matrix structure */
3548  write_matrix(pb, 1, 0, 0, 1, 0, 0);
3549 
3550  avio_wb32(pb, 0); /* reserved (preview time) */
3551  avio_wb32(pb, 0); /* reserved (preview duration) */
3552  avio_wb32(pb, 0); /* reserved (poster time) */
3553  avio_wb32(pb, 0); /* reserved (selection time) */
3554  avio_wb32(pb, 0); /* reserved (selection duration) */
3555  avio_wb32(pb, 0); /* reserved (current time) */
3556  avio_wb32(pb, max_track_id + 1); /* Next track id */
3557  return 0x6c;
3558 }
3559 
3560 static int mov_write_itunes_hdlr_tag(AVIOContext *pb, MOVMuxContext *mov,
3561  AVFormatContext *s)
3562 {
3563  avio_wb32(pb, 33); /* size */
3564  ffio_wfourcc(pb, "hdlr");
3565  avio_wb32(pb, 0);
3566  avio_wb32(pb, 0);
3567  ffio_wfourcc(pb, "mdir");
3568  ffio_wfourcc(pb, "appl");
3569  avio_wb32(pb, 0);
3570  avio_wb32(pb, 0);
3571  avio_w8(pb, 0);
3572  return 33;
3573 }
3574 
3575 /* helper function to write a data tag with the specified string as data */
3576 static int mov_write_string_data_tag(AVIOContext *pb, const char *data, int lang, int long_style)
3577 {
3578  size_t data_len = strlen(data);
3579  if (long_style) {
3580  int size = 16 + data_len;
3581  avio_wb32(pb, size); /* size */
3582  ffio_wfourcc(pb, "data");
3583  avio_wb32(pb, 1);
3584  avio_wb32(pb, 0);
3585  avio_write(pb, data, data_len);
3586  return size;
3587  } else {
3588  avio_wb16(pb, data_len); /* string length */
3589  if (!lang)
3590  lang = ff_mov_iso639_to_lang("und", 1);
3591  avio_wb16(pb, lang);
3592  avio_write(pb, data, data_len);
3593  return data_len + 4;
3594  }
3595 }
3596 
3597 static int mov_write_string_tag(AVIOContext *pb, const char *name,
3598  const char *value, int lang, int long_style)
3599 {
3600  int size = 0;
3601  if (value && value[0]) {
3602  int64_t pos = avio_tell(pb);
3603  avio_wb32(pb, 0); /* size */
3604  ffio_wfourcc(pb, name);
3605  mov_write_string_data_tag(pb, value, lang, long_style);
3606  size = update_size(pb, pos);
3607  }
3608  return size;
3609 }
3610 
3611 static AVDictionaryEntry *get_metadata_lang(AVFormatContext *s,
3612  const char *tag, int *lang)
3613 {
3614  int l, len, len2;
3615  AVDictionaryEntry *t, *t2 = NULL;
3616  char tag2[16];
3617 
3618  *lang = 0;
3619 
3620  if (!(t = av_dict_get(s->metadata, tag, NULL, 0)))
3621  return NULL;
3622 
3623  len = strlen(t->key);
3624  snprintf(tag2, sizeof(tag2), "%s-", tag);
3625  while ((t2 = av_dict_get(s->metadata, tag2, t2, AV_DICT_IGNORE_SUFFIX))) {
3626  len2 = strlen(t2->key);
3627  if (len2 == len + 4 && !strcmp(t->value, t2->value)
3628  && (l = ff_mov_iso639_to_lang(&t2->key[len2 - 3], 1)) >= 0) {
3629  *lang = l;
3630  return t;
3631  }
3632  }
3633  return t;
3634 }
3635 
3636 static int mov_write_string_metadata(AVFormatContext *s, AVIOContext *pb,
3637  const char *name, const char *tag,
3638  int long_style)
3639 {
3640  int lang;
3641  AVDictionaryEntry *t = get_metadata_lang(s, tag, &lang);
3642  if (!t)
3643  return 0;
3644  return mov_write_string_tag(pb, name, t->value, lang, long_style);
3645 }
3646 
3647 /* iTunes bpm number */
3648 static int mov_write_tmpo_tag(AVIOContext *pb, AVFormatContext *s)
3649 {
3650  AVDictionaryEntry *t = av_dict_get(s->metadata, "tmpo", NULL, 0);
3651  int size = 0, tmpo = t ? atoi(t->value) : 0;
3652  if (tmpo) {
3653  size = 26;
3654  avio_wb32(pb, size);
3655  ffio_wfourcc(pb, "tmpo");
3656  avio_wb32(pb, size-8); /* size */
3657  ffio_wfourcc(pb, "data");
3658  avio_wb32(pb, 0x15); //type specifier
3659  avio_wb32(pb, 0);
3660  avio_wb16(pb, tmpo); // data
3661  }
3662  return size;
3663 }
3664 
3665 /* 3GPP TS 26.244 */
3666 static int mov_write_loci_tag(AVFormatContext *s, AVIOContext *pb)
3667 {
3668  int lang;
3669  int64_t pos = avio_tell(pb);
3670  double latitude, longitude, altitude;
3671  int32_t latitude_fix, longitude_fix, altitude_fix;
3672  AVDictionaryEntry *t = get_metadata_lang(s, "location", &lang);
3673  const char *ptr, *place = "";
3674  char *end;
3675  static const char *astronomical_body = "earth";
3676  if (!t)
3677  return 0;
3678 
3679  ptr = t->value;
3680  longitude = strtod(ptr, &end);
3681  if (end == ptr) {
3682  av_log(s, AV_LOG_WARNING, "malformed location metadata\n");
3683  return 0;
3684  }
3685  ptr = end;
3686  latitude = strtod(ptr, &end);
3687  if (end == ptr) {
3688  av_log(s, AV_LOG_WARNING, "malformed location metadata\n");
3689  return 0;
3690  }
3691  ptr = end;
3692  altitude = strtod(ptr, &end);
3693  /* If no altitude was present, the default 0 should be fine */
3694  if (*end == '/')
3695  place = end + 1;
3696 
3697  latitude_fix = (int32_t) ((1 << 16) * latitude);
3698  longitude_fix = (int32_t) ((1 << 16) * longitude);
3699  altitude_fix = (int32_t) ((1 << 16) * altitude);
3700 
3701  avio_wb32(pb, 0); /* size */
3702  ffio_wfourcc(pb, "loci"); /* type */
3703  avio_wb32(pb, 0); /* version + flags */
3704  avio_wb16(pb, lang);
3705  avio_write(pb, place, strlen(place) + 1);
3706  avio_w8(pb, 0); /* role of place (0 == shooting location, 1 == real location, 2 == fictional location) */
3707  avio_wb32(pb, latitude_fix);
3708  avio_wb32(pb, longitude_fix);
3709  avio_wb32(pb, altitude_fix);
3710  avio_write(pb, astronomical_body, strlen(astronomical_body) + 1);
3711  avio_w8(pb, 0); /* additional notes, null terminated string */
3712 
3713  return update_size(pb, pos);
3714 }
3715 
3716 /* iTunes track or disc number */
3717 static int mov_write_trkn_tag(AVIOContext *pb, MOVMuxContext *mov,
3718  AVFormatContext *s, int disc)
3719 {
3720  AVDictionaryEntry *t = av_dict_get(s->metadata,
3721  disc ? "disc" : "track",
3722  NULL, 0);
3723  int size = 0, track = t ? atoi(t->value) : 0;
3724  if (track) {
3725  int tracks = 0;
3726  char *slash = strchr(t->value, '/');
3727  if (slash)
3728  tracks = atoi(slash + 1);
3729  avio_wb32(pb, 32); /* size */
3730  ffio_wfourcc(pb, disc ? "disk" : "trkn");
3731  avio_wb32(pb, 24); /* size */
3732  ffio_wfourcc(pb, "data");
3733  avio_wb32(pb, 0); // 8 bytes empty
3734  avio_wb32(pb, 0);
3735  avio_wb16(pb, 0); // empty
3736  avio_wb16(pb, track); // track / disc number
3737  avio_wb16(pb, tracks); // total track / disc number
3738  avio_wb16(pb, 0); // empty
3739  size = 32;
3740  }
3741  return size;
3742 }
3743 
3744 static int mov_write_int8_metadata(AVFormatContext *s, AVIOContext *pb,
3745  const char *name, const char *tag,
3746  int len)
3747 {
3748  AVDictionaryEntry *t = NULL;
3749  uint8_t num;
3750  int size = 24 + len;
3751 
3752  if (len != 1 && len != 4)
3753  return -1;
3754 
3755  if (!(t = av_dict_get(s->metadata, tag, NULL, 0)))
3756  return 0;
3757  num = atoi(t->value);
3758 
3759  avio_wb32(pb, size);
3760  ffio_wfourcc(pb, name);
3761  avio_wb32(pb, size - 8);
3762  ffio_wfourcc(pb, "data");
3763  avio_wb32(pb, 0x15);
3764  avio_wb32(pb, 0);
3765  if (len==4) avio_wb32(pb, num);
3766  else avio_w8 (pb, num);
3767 
3768  return size;
3769 }
3770 
3771 static int mov_write_covr(AVIOContext *pb, AVFormatContext *s)
3772 {
3773  MOVMuxContext *mov = s->priv_data;
3774  int64_t pos = 0;
3775  int i;
3776 
3777  for (i = 0; i < s->nb_streams; i++) {
3778  MOVTrack *trk = &mov->tracks[i];
3779 
3780  if (!is_cover_image(trk->st) || trk->cover_image->size <= 0)
3781  continue;
3782 
3783  if (!pos) {
3784  pos = avio_tell(pb);
3785  avio_wb32(pb, 0);
3786  ffio_wfourcc(pb, "covr");
3787  }
3788  avio_wb32(pb, 16 + trk->cover_image->size);
3789  ffio_wfourcc(pb, "data");
3790  avio_wb32(pb, trk->tag);
3791  avio_wb32(pb , 0);
3792  avio_write(pb, trk->cover_image->data, trk->cover_image->size);
3793  }
3794 
3795  return pos ? update_size(pb, pos) : 0;
3796 }
3797 
3798 /* iTunes meta data list */
3799 static int mov_write_ilst_tag(AVIOContext *pb, MOVMuxContext *mov,
3800  AVFormatContext *s)
3801 {
3802  int64_t pos = avio_tell(pb);
3803  avio_wb32(pb, 0); /* size */
3804  ffio_wfourcc(pb, "ilst");
3805  mov_write_string_metadata(s, pb, "\251nam", "title" , 1);
3806  mov_write_string_metadata(s, pb, "\251ART", "artist" , 1);
3807  mov_write_string_metadata(s, pb, "aART", "album_artist", 1);
3808  mov_write_string_metadata(s, pb, "\251wrt", "composer" , 1);
3809  mov_write_string_metadata(s, pb, "\251alb", "album" , 1);
3810  mov_write_string_metadata(s, pb, "\251day", "date" , 1);
3811  if (!mov_write_string_metadata(s, pb, "\251too", "encoding_tool", 1)) {
3812  if (!(s->flags & AVFMT_FLAG_BITEXACT))
3813  mov_write_string_tag(pb, "\251too", LIBAVFORMAT_IDENT, 0, 1);
3814  }
3815  mov_write_string_metadata(s, pb, "\251cmt", "comment" , 1);
3816  mov_write_string_metadata(s, pb, "\251gen", "genre" , 1);
3817  mov_write_string_metadata(s, pb, "cprt", "copyright", 1);
3818  mov_write_string_metadata(s, pb, "\251grp", "grouping" , 1);
3819  mov_write_string_metadata(s, pb, "\251lyr", "lyrics" , 1);
3820  mov_write_string_metadata(s, pb, "desc", "description",1);
3821  mov_write_string_metadata(s, pb, "ldes", "synopsis" , 1);
3822  mov_write_string_metadata(s, pb, "tvsh", "show" , 1);
3823  mov_write_string_metadata(s, pb, "tven", "episode_id",1);
3824  mov_write_string_metadata(s, pb, "tvnn", "network" , 1);
3825  mov_write_string_metadata(s, pb, "keyw", "keywords" , 1);
3826  mov_write_int8_metadata (s, pb, "tves", "episode_sort",4);
3827  mov_write_int8_metadata (s, pb, "tvsn", "season_number",4);
3828  mov_write_int8_metadata (s, pb, "stik", "media_type",1);
3829  mov_write_int8_metadata (s, pb, "hdvd", "hd_video", 1);
3830  mov_write_int8_metadata (s, pb, "pgap", "gapless_playback",1);
3831  mov_write_int8_metadata (s, pb, "cpil", "compilation", 1);
3832  mov_write_covr(pb, s);
3833  mov_write_trkn_tag(pb, mov, s, 0); // track number
3834  mov_write_trkn_tag(pb, mov, s, 1); // disc number
3835  mov_write_tmpo_tag(pb, s);
3836  return update_size(pb, pos);
3837 }
3838 
3839 static int mov_write_mdta_hdlr_tag(AVIOContext *pb, MOVMuxContext *mov,
3840  AVFormatContext *s)
3841 {
3842  avio_wb32(pb, 33); /* size */
3843  ffio_wfourcc(pb, "hdlr");
3844  avio_wb32(pb, 0);
3845  avio_wb32(pb, 0);
3846  ffio_wfourcc(pb, "mdta");
3847  avio_wb32(pb, 0);
3848  avio_wb32(pb, 0);
3849  avio_wb32(pb, 0);
3850  avio_w8(pb, 0);
3851  return 33;
3852 }
3853 
3854 static int mov_write_mdta_keys_tag(AVIOContext *pb, MOVMuxContext *mov,
3855  AVFormatContext *s)
3856 {
3857  AVDictionaryEntry *t = NULL;
3858  int64_t pos = avio_tell(pb);
3859  int64_t curpos, entry_pos;
3860  int count = 0;
3861 
3862  avio_wb32(pb, 0); /* size */
3863  ffio_wfourcc(pb, "keys");
3864  avio_wb32(pb, 0);
3865  entry_pos = avio_tell(pb);
3866  avio_wb32(pb, 0); /* entry count */
3867 
3868  while (t = av_dict_get(s->metadata, "", t, AV_DICT_IGNORE_SUFFIX)) {
3869  size_t key_len = strlen(t->key);
3870  avio_wb32(pb, key_len + 8);
3871  ffio_wfourcc(pb, "mdta");
3872  avio_write(pb, t->key, key_len);
3873  count += 1;
3874  }
3875  curpos = avio_tell(pb);
3876  avio_seek(pb, entry_pos, SEEK_SET);
3877  avio_wb32(pb, count); // rewrite entry count
3878  avio_seek(pb, curpos, SEEK_SET);
3879 
3880  return update_size(pb, pos);
3881 }
3882 
3883 static int mov_write_mdta_ilst_tag(AVIOContext *pb, MOVMuxContext *mov,
3884  AVFormatContext *s)
3885 {
3886  AVDictionaryEntry *t = NULL;
3887  int64_t pos = avio_tell(pb);
3888  int count = 1; /* keys are 1-index based */
3889 
3890  avio_wb32(pb, 0); /* size */
3891  ffio_wfourcc(pb, "ilst");
3892 
3893  while (t = av_dict_get(s->metadata, "", t, AV_DICT_IGNORE_SUFFIX)) {
3894  int64_t entry_pos = avio_tell(pb);
3895  avio_wb32(pb, 0); /* size */
3896  avio_wb32(pb, count); /* key */
3897  mov_write_string_data_tag(pb, t->value, 0, 1);
3898  update_size(pb, entry_pos);
3899  count += 1;
3900  }
3901  return update_size(pb, pos);
3902 }
3903 
3904 /* meta data tags */
3905 static int mov_write_meta_tag(AVIOContext *pb, MOVMuxContext *mov,
3906  AVFormatContext *s)
3907 {
3908  int size = 0;
3909  int64_t pos = avio_tell(pb);
3910  avio_wb32(pb, 0); /* size */
3911  ffio_wfourcc(pb, "meta");
3912  avio_wb32(pb, 0);
3913  if (mov->flags & FF_MOV_FLAG_USE_MDTA) {
3914  mov_write_mdta_hdlr_tag(pb, mov, s);
3915  mov_write_mdta_keys_tag(pb, mov, s);
3916  mov_write_mdta_ilst_tag(pb, mov, s);
3917  }
3918  else {
3919  /* iTunes metadata tag */
3920  mov_write_itunes_hdlr_tag(pb, mov, s);
3921  mov_write_ilst_tag(pb, mov, s);
3922  }
3923  size = update_size(pb, pos);
3924  return size;
3925 }
3926 
3927 static int mov_write_raw_metadata_tag(AVFormatContext *s, AVIOContext *pb,
3928  const char *name, const char *key)
3929 {
3930  int len;
3931  AVDictionaryEntry *t;
3932 
3933  if (!(t = av_dict_get(s->metadata, key, NULL, 0)))
3934  return 0;
3935 
3936  len = strlen(t->value);
3937  if (len > 0) {
3938  int size = len + 8;
3939  avio_wb32(pb, size);
3940  ffio_wfourcc(pb, name);
3941  avio_write(pb, t->value, len);
3942  return size;
3943  }
3944  return 0;
3945 }
3946 
3947 static int ascii_to_wc(AVIOContext *pb, const uint8_t *b)
3948 {
3949  int val;
3950  while (*b) {
3951  GET_UTF8(val, *b++, return -1;)
3952  avio_wb16(pb, val);
3953  }
3954  avio_wb16(pb, 0x00);
3955  return 0;
3956 }
3957 
3958 static uint16_t language_code(const char *str)
3959 {
3960  return (((str[0] - 0x60) & 0x1F) << 10) +
3961  (((str[1] - 0x60) & 0x1F) << 5) +
3962  (( str[2] - 0x60) & 0x1F);
3963 }
3964 
3965 static int mov_write_3gp_udta_tag(AVIOContext *pb, AVFormatContext *s,
3966  const char *tag, const char *str)
3967 {
3968  int64_t pos = avio_tell(pb);
3969  AVDictionaryEntry *t = av_dict_get(s->metadata, str, NULL, 0);
3970  if (!t || !utf8len(t->value))
3971  return 0;
3972  avio_wb32(pb, 0); /* size */
3973  ffio_wfourcc(pb, tag); /* type */
3974  avio_wb32(pb, 0); /* version + flags */
3975  if (!strcmp(tag, "yrrc"))
3976  avio_wb16(pb, atoi(t->value));
3977  else {
3978  avio_wb16(pb, language_code("eng")); /* language */
3979  avio_write(pb, t->value, strlen(t->value) + 1); /* UTF8 string value */
3980  if (!strcmp(tag, "albm") &&
3981  (t = av_dict_get(s->metadata, "track", NULL, 0)))
3982  avio_w8(pb, atoi(t->value));
3983  }
3984  return update_size(pb, pos);
3985 }
3986 
3987 static int mov_write_chpl_tag(AVIOContext *pb, AVFormatContext *s)
3988 {
3989  int64_t pos = avio_tell(pb);
3990  int i, nb_chapters = FFMIN(s->nb_chapters, 255);
3991 
3992  avio_wb32(pb, 0); // size
3993  ffio_wfourcc(pb, "chpl");
3994  avio_wb32(pb, 0x01000000); // version + flags
3995  avio_wb32(pb, 0); // unknown
3996  avio_w8(pb, nb_chapters);
3997 
3998  for (i = 0; i < nb_chapters; i++) {
3999  AVChapter *c = s->chapters[i];
4000  AVDictionaryEntry *t;
4001  avio_wb64(pb, av_rescale_q(c->start, c->time_base, (AVRational){1,10000000}));
4002 
4003  if ((t = av_dict_get(c->metadata, "title", NULL, 0))) {
4004  int len = FFMIN(strlen(t->value), 255);
4005  avio_w8(pb, len);
4006  avio_write(pb, t->value, len);
4007  } else
4008  avio_w8(pb, 0);
4009  }
4010  return update_size(pb, pos);
4011 }
4012 
4013 static int mov_write_udta_tag(AVIOContext *pb, MOVMuxContext *mov,
4014  AVFormatContext *s)
4015 {
4016  AVIOContext *pb_buf;
4017  int ret, size;
4018  uint8_t *buf;
4019 
4020  ret = avio_open_dyn_buf(&pb_buf);
4021  if (ret < 0)
4022  return ret;
4023 
4024  if (mov->mode & MODE_3GP) {
4025  mov_write_3gp_udta_tag(pb_buf, s, "perf", "artist");
4026  mov_write_3gp_udta_tag(pb_buf, s, "titl", "title");
4027  mov_write_3gp_udta_tag(pb_buf, s, "auth", "author");
4028  mov_write_3gp_udta_tag(pb_buf, s, "gnre", "genre");
4029  mov_write_3gp_udta_tag(pb_buf, s, "dscp", "comment");
4030  mov_write_3gp_udta_tag(pb_buf, s, "albm", "album");
4031  mov_write_3gp_udta_tag(pb_buf, s, "cprt", "copyright");
4032  mov_write_3gp_udta_tag(pb_buf, s, "yrrc", "date");
4033  mov_write_loci_tag(s, pb_buf);
4034  } else if (mov->mode == MODE_MOV && !(mov->flags & FF_MOV_FLAG_USE_MDTA)) { // the title field breaks gtkpod with mp4 and my suspicion is that stuff is not valid in mp4
4035  mov_write_string_metadata(s, pb_buf, "\251ART", "artist", 0);
4036  mov_write_string_metadata(s, pb_buf, "\251nam", "title", 0);
4037  mov_write_string_metadata(s, pb_buf, "\251aut", "author", 0);
4038  mov_write_string_metadata(s, pb_buf, "\251alb", "album", 0);
4039  mov_write_string_metadata(s, pb_buf, "\251day", "date", 0);
4040  mov_write_string_metadata(s, pb_buf, "\251swr", "encoder", 0);
4041  // currently ignored by mov.c
4042  mov_write_string_metadata(s, pb_buf, "\251des", "comment", 0);
4043  // add support for libquicktime, this atom is also actually read by mov.c
4044  mov_write_string_metadata(s, pb_buf, "\251cmt", "comment", 0);
4045  mov_write_string_metadata(s, pb_buf, "\251gen", "genre", 0);
4046  mov_write_string_metadata(s, pb_buf, "\251cpy", "copyright", 0);
4047  mov_write_string_metadata(s, pb_buf, "\251mak", "make", 0);
4048  mov_write_string_metadata(s, pb_buf, "\251mod", "model", 0);
4049  mov_write_string_metadata(s, pb_buf, "\251xyz", "location", 0);
4050  mov_write_string_metadata(s, pb_buf, "\251key", "keywords", 0);
4051  mov_write_raw_metadata_tag(s, pb_buf, "XMP_", "xmp");
4052  } else {
4053  /* iTunes meta data */
4054  mov_write_meta_tag(pb_buf, mov, s);
4055  mov_write_loci_tag(s, pb_buf);
4056  }
4057 
4058  if (s->nb_chapters && !(mov->flags & FF_MOV_FLAG_DISABLE_CHPL))
4059  mov_write_chpl_tag(pb_buf, s);
4060 
4061  if ((size = avio_get_dyn_buf(pb_buf, &buf)) > 0) {
4062  avio_wb32(pb, size + 8);
4063  ffio_wfourcc(pb, "udta");
4064  avio_write(pb, buf, size);
4065  }
4066  ffio_free_dyn_buf(&pb_buf);
4067 
4068  return 0;
4069 }
4070 
4071 static void mov_write_psp_udta_tag(AVIOContext *pb,
4072  const char *str, const char *lang, int type)
4073 {
4074  int len = utf8len(str) + 1;
4075  if (len <= 0)
4076  return;
4077  avio_wb16(pb, len * 2 + 10); /* size */
4078  avio_wb32(pb, type); /* type */
4079  avio_wb16(pb, language_code(lang)); /* language */
4080  avio_wb16(pb, 0x01); /* ? */
4081  ascii_to_wc(pb, str);
4082 }
4083 
4084 static int mov_write_uuidusmt_tag(AVIOContext *pb, AVFormatContext *s)
4085 {
4086  AVDictionaryEntry *title = av_dict_get(s->metadata, "title", NULL, 0);
4087  int64_t pos, pos2;
4088 
4089  if (title) {
4090  pos = avio_tell(pb);
4091  avio_wb32(pb, 0); /* size placeholder*/
4092  ffio_wfourcc(pb, "uuid");
4093  ffio_wfourcc(pb, "USMT");
4094  avio_wb32(pb, 0x21d24fce); /* 96 bit UUID */
4095  avio_wb32(pb, 0xbb88695c);
4096  avio_wb32(pb, 0xfac9c740);
4097 
4098  pos2 = avio_tell(pb);
4099  avio_wb32(pb, 0); /* size placeholder*/
4100  ffio_wfourcc(pb, "MTDT");
4101  avio_wb16(pb, 4);
4102 
4103  // ?
4104  avio_wb16(pb, 0x0C); /* size */
4105  avio_wb32(pb, 0x0B); /* type */
4106  avio_wb16(pb, language_code("und")); /* language */
4107  avio_wb16(pb, 0x0); /* ? */
4108  avio_wb16(pb, 0x021C); /* data */
4109 
4110  if (!(s->flags & AVFMT_FLAG_BITEXACT))
4111  mov_write_psp_udta_tag(pb, LIBAVCODEC_IDENT, "eng", 0x04);
4112  mov_write_psp_udta_tag(pb, title->value, "eng", 0x01);
4113  mov_write_psp_udta_tag(pb, "2006/04/01 11:11:11", "und", 0x03);
4114 
4115  update_size(pb, pos2);
4116  return update_size(pb, pos);
4117  }
4118 
4119  return 0;
4120 }
4121 
4122 static void build_chunks(MOVTrack *trk)
4123 {
4124  int i;
4125  MOVIentry *chunk = &trk->cluster[0];
4126  uint64_t chunkSize = chunk->size;
4127  chunk->chunkNum = 1;
4128  if (trk->chunkCount)
4129  return;
4130  trk->chunkCount = 1;
4131  for (i = 1; i<trk->entry; i++){
4132  if (chunk->pos + chunkSize == trk->cluster[i].pos &&
4133  chunkSize + trk->cluster[i].size < (1<<20)){
4134  chunkSize += trk->cluster[i].size;
4135  chunk->samples_in_chunk += trk->cluster[i].entries;
4136  } else {
4137  trk->cluster[i].chunkNum = chunk->chunkNum+1;
4138  chunk=&trk->cluster[i];
4139  chunkSize = chunk->size;
4140  trk->chunkCount++;
4141  }
4142  }
4143 }
4144 
4145 /**
4146  * Assign track ids. If option "use_stream_ids_as_track_ids" is set,
4147  * the stream ids are used as track ids.
4148  *
4149  * This assumes mov->tracks and s->streams are in the same order and
4150  * there are no gaps in either of them (so mov->tracks[n] refers to
4151  * s->streams[n]).
4152  *
4153  * As an exception, there can be more entries in
4154  * s->streams than in mov->tracks, in which case new track ids are
4155  * generated (starting after the largest found stream id).
4156  */
4157 static int mov_setup_track_ids(MOVMuxContext *mov, AVFormatContext *s)
4158 {
4159  int i;
4160 
4161  if (mov->track_ids_ok)
4162  return 0;
4163 
4164  if (mov->use_stream_ids_as_track_ids) {
4165  int next_generated_track_id = 0;
4166  for (i = 0; i < s->nb_streams; i++) {
4167  if (s->streams[i]->id > next_generated_track_id)
4168  next_generated_track_id = s->streams[i]->id;
4169  }
4170 
4171  for (i = 0; i < mov->nb_streams; i++) {
4172  if (mov->tracks[i].entry <= 0 && !(mov->flags & FF_MOV_FLAG_FRAGMENT))
4173  continue;
4174 
4175  mov->tracks[i].track_id = i >= s->nb_streams ? ++next_generated_track_id : s->streams[i]->id;
4176  }
4177  } else {
4178  for (i = 0; i < mov->nb_streams; i++) {
4179  if (mov->tracks[i].entry <= 0 && !(mov->flags & FF_MOV_FLAG_FRAGMENT))
4180  continue;
4181 
4182  mov->tracks[i].track_id = i + 1;
4183  }
4184  }
4185 
4186  mov->track_ids_ok = 1;
4187 
4188  return 0;
4189 }
4190 
4191 static int mov_write_moov_tag(AVIOContext *pb, MOVMuxContext *mov,
4192  AVFormatContext *s)
4193 {
4194  int i;
4195  int64_t pos = avio_tell(pb);
4196  avio_wb32(pb, 0); /* size placeholder*/
4197  ffio_wfourcc(pb, "moov");
4198 
4199  mov_setup_track_ids(mov, s);
4200 
4201  for (i = 0; i < mov->nb_streams; i++) {
4202  if (mov->tracks[i].entry <= 0 && !(mov->flags & FF_MOV_FLAG_FRAGMENT))
4203  continue;
4204 
4205  mov->tracks[i].time = mov->time;
4206 
4207  if (mov->tracks[i].entry)
4208  build_chunks(&mov->tracks[i]);
4209  }
4210 
4211  if (mov->chapter_track)
4212  for (i = 0; i < s->nb_streams; i++) {
4213  mov->tracks[i].tref_tag = MKTAG('c','h','a','p');
4214  mov->tracks[i].tref_id = mov->tracks[mov->chapter_track].track_id;
4215  }
4216  for (i = 0;