FFmpeg
gxfenc.c
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1 /*
2  * GXF muxer.
3  * Copyright (c) 2006 SmartJog S.A., Baptiste Coudurier <baptiste dot coudurier at smartjog dot com>
4  *
5  * This file is part of FFmpeg.
6  *
7  * FFmpeg is free software; you can redistribute it and/or
8  * modify it under the terms of the GNU Lesser General Public
9  * License as published by the Free Software Foundation; either
10  * version 2.1 of the License, or (at your option) any later version.
11  *
12  * FFmpeg is distributed in the hope that it will be useful,
13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15  * Lesser General Public License for more details.
16  *
17  * You should have received a copy of the GNU Lesser General Public
18  * License along with FFmpeg; if not, write to the Free Software
19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20  */
21 
22 #include "libavutil/avassert.h"
23 #include "libavutil/intfloat.h"
24 #include "libavutil/mathematics.h"
25 #include "libavutil/mem.h"
26 #include "avformat.h"
27 #include "avio_internal.h"
28 #include "internal.h"
29 #include "gxf.h"
30 #include "mux.h"
31 
32 #define GXF_SAMPLES_PER_FRAME 32768
33 #define GXF_AUDIO_PACKET_SIZE 65536
34 
35 #define GXF_TIMECODE(c, d, h, m, s, f) \
36  ((c) << 30 | (d) << 29 | (h) << 24 | (m) << 16 | (s) << 8 | (f))
37 
38 typedef struct GXFTimecode{
39  int hh;
40  int mm;
41  int ss;
42  int ff;
43  int color;
44  int drop;
45 } GXFTimecode;
46 
47 typedef struct GXFStreamContext {
48  int64_t pkt_cnt;
49  uint32_t track_type;
50  uint32_t sample_size;
51  uint32_t sample_rate;
52  uint16_t media_type;
53  uint16_t media_info;
54  int frame_rate_index;
55  int lines_index;
56  int fields;
57  int iframes;
58  int pframes;
59  int bframes;
60  int p_per_gop;
61  int b_per_i_or_p; ///< number of B-frames per I-frame or P-frame
62  int first_gop_closed;
63  unsigned order; ///< interleaving order
64 } GXFStreamContext;
65 
66 typedef struct GXFContext {
67  AVClass *av_class;
68  uint32_t nb_fields;
69  uint16_t audio_tracks;
70  uint16_t mpeg_tracks;
71  int64_t creation_time;
72  uint32_t umf_start_offset;
73  uint32_t umf_track_offset;
74  uint32_t umf_media_offset;
75  uint32_t umf_length;
76  uint16_t umf_track_size;
77  uint16_t umf_media_size;
78  AVRational time_base;
79  int flags;
80  GXFStreamContext timecode_track;
81  unsigned *flt_entries; ///< offsets of packets /1024, starts after 2nd video field
82  unsigned flt_entries_nb;
83  uint64_t *map_offsets; ///< offset of map packets
84  unsigned map_offsets_nb;
85  unsigned packet_count;
86  GXFTimecode tc;
87 } GXFContext;
88 
89 static const struct {
90  int height, index;
91 } gxf_lines_tab[] = {
92  { 480, 1 }, /* NTSC */
93  { 512, 1 }, /* NTSC + VBI */
94  { 576, 2 }, /* PAL */
95  { 608, 2 }, /* PAL + VBI */
96  { 1080, 4 },
97  { 720, 6 },
98 };
99 
100 static const AVCodecTag gxf_media_types[] = {
101  { AV_CODEC_ID_MJPEG , 3 }, /* NTSC */
102  { AV_CODEC_ID_MJPEG , 4 }, /* PAL */
103  { AV_CODEC_ID_PCM_S24LE , 9 },
104  { AV_CODEC_ID_PCM_S16LE , 10 },
105  { AV_CODEC_ID_MPEG2VIDEO, 11 }, /* NTSC */
106  { AV_CODEC_ID_MPEG2VIDEO, 12 }, /* PAL */
107  { AV_CODEC_ID_DVVIDEO , 13 }, /* NTSC */
108  { AV_CODEC_ID_DVVIDEO , 14 }, /* PAL */
109  { AV_CODEC_ID_DVVIDEO , 15 }, /* 50M NTSC */
110  { AV_CODEC_ID_DVVIDEO , 16 }, /* 50M PAL */
111  { AV_CODEC_ID_AC3 , 17 },
112  //{ AV_CODEC_ID_NONE, , 18 }, /* Non compressed 24 bit audio */
113  { AV_CODEC_ID_MPEG2VIDEO, 20 }, /* MPEG HD */
114  { AV_CODEC_ID_MPEG1VIDEO, 22 }, /* NTSC */
115  { AV_CODEC_ID_MPEG1VIDEO, 23 }, /* PAL */
116  { AV_CODEC_ID_NONE, 0 },
117 };
118 
119 #define SERVER_PATH "EXT:/PDR/default/"
120 #define ES_NAME_PATTERN "EXT:/PDR/default/ES."
121 
122 static int gxf_find_lines_index(AVStream *st)
123 {
124  GXFStreamContext *sc = st->priv_data;
125  int i;
126 
127  for (i = 0; i < 6; ++i) {
128  if (st->codecpar->height == gxf_lines_tab[i].height) {
129  sc->lines_index = gxf_lines_tab[i].index;
130  return 0;
131  }
132  }
133  return -1;
134 }
135 
136 static void gxf_write_padding(AVIOContext *pb, int64_t to_pad)
137 {
138  ffio_fill(pb, 0, to_pad);
139 }
140 
141 static int64_t update_packet_size(AVIOContext *pb, int64_t pos)
142 {
143  int64_t curpos;
144  int size;
145 
146  size = avio_tell(pb) - pos;
147  if (size % 4) {
148  gxf_write_padding(pb, 4 - size % 4);
149  size = avio_tell(pb) - pos;
150  }
151  curpos = avio_tell(pb);
152  avio_seek(pb, pos + 6, SEEK_SET);
153  avio_wb32(pb, size);
154  avio_seek(pb, curpos, SEEK_SET);
155  return curpos - pos;
156 }
157 
158 static int64_t update_size(AVIOContext *pb, int64_t pos)
159 {
160  int64_t curpos;
161 
162  curpos = avio_tell(pb);
163  avio_seek(pb, pos, SEEK_SET);
164  avio_wb16(pb, curpos - pos - 2);
165  avio_seek(pb, curpos, SEEK_SET);
166  return curpos - pos;
167 }
168 
169 static void gxf_write_packet_header(AVIOContext *pb, GXFPktType type)
170 {
171  avio_wb32(pb, 0); /* packet leader for synchro */
172  avio_w8(pb, 1);
173  avio_w8(pb, type); /* map packet */
174  avio_wb32(pb, 0); /* size */
175  avio_wb32(pb, 0); /* reserved */
176  avio_w8(pb, 0xE1); /* trailer 1 */
177  avio_w8(pb, 0xE2); /* trailer 2 */
178 }
179 
180 static int gxf_write_mpeg_auxiliary(AVIOContext *pb, AVStream *st)
181 {
182  GXFStreamContext *sc = st->priv_data;
183  char buffer[1024];
184  int size, starting_line;
185 
186  if (sc->iframes) {
187  sc->p_per_gop = sc->pframes / sc->iframes;
188  if (sc->pframes % sc->iframes)
189  sc->p_per_gop++;
190  if (sc->pframes) {
191  sc->b_per_i_or_p = sc->bframes / sc->pframes;
192  if (sc->bframes % sc->pframes)
193  sc->b_per_i_or_p++;
194  }
195  if (sc->p_per_gop > 9)
196  sc->p_per_gop = 9; /* ensure value won't take more than one char */
197  if (sc->b_per_i_or_p > 9)
198  sc->b_per_i_or_p = 9; /* ensure value won't take more than one char */
199  }
200  if (st->codecpar->height == 512 || st->codecpar->height == 608)
201  starting_line = 7; // VBI
202  else if (st->codecpar->height == 480)
203  starting_line = 20;
204  else
205  starting_line = 23; // default PAL
206 
207  size = snprintf(buffer, sizeof(buffer), "Ver 1\nBr %.6f\nIpg 1\nPpi %d\nBpiop %d\n"
208  "Pix 0\nCf %d\nCg %d\nSl %d\nnl16 %d\nVi 1\nf1 1\n",
209  (float)st->codecpar->bit_rate, sc->p_per_gop, sc->b_per_i_or_p,
210  st->codecpar->format == AV_PIX_FMT_YUV422P ? 2 : 1, sc->first_gop_closed == 1,
211  starting_line, (st->codecpar->height + 15) / 16);
212  av_assert0(size < sizeof(buffer));
213  avio_w8(pb, TRACK_MPG_AUX);
214  avio_w8(pb, size + 1);
215  avio_write(pb, (uint8_t *)buffer, size + 1);
216  return size + 3;
217 }
218 
219 static int gxf_write_dv_auxiliary(AVIOContext *pb, AVStream *st)
220 {
221  int64_t track_aux_data = 0;
222 
223  avio_w8(pb, TRACK_AUX);
224  avio_w8(pb, 8);
225  if (st->codecpar->format == AV_PIX_FMT_YUV420P)
226  track_aux_data |= 0x01; /* marks stream as DVCAM instead of DVPRO */
227  track_aux_data |= 0x40000000; /* aux data is valid */
228  avio_wl64(pb, track_aux_data);
229  return 8;
230 }
231 
232 static int gxf_write_timecode_auxiliary(AVIOContext *pb, GXFContext *gxf)
233 {
234  uint32_t timecode = GXF_TIMECODE(gxf->tc.color, gxf->tc.drop,
235  gxf->tc.hh, gxf->tc.mm,
236  gxf->tc.ss, gxf->tc.ff);
237 
238  avio_w8(pb, TRACK_AUX);
239  avio_w8(pb, 8);
240  avio_wl32(pb, timecode);
241  /* reserved */
242  avio_wl32(pb, 0);
243  return 8;
244 }
245 
246 static int gxf_write_track_description(AVFormatContext *s, GXFStreamContext *sc, int index)
247 {
248  GXFContext *gxf = s->priv_data;
249  AVIOContext *pb = s->pb;
250  int64_t pos;
251 
252  /* track description section */
253  avio_w8(pb, sc->media_type + 0x80);
254  avio_w8(pb, index + 0xC0);
255 
256  pos = avio_tell(pb);
257  avio_wb16(pb, 0); /* size */
258 
259  /* media file name */
260  avio_w8(pb, TRACK_NAME);
261  avio_w8(pb, strlen(ES_NAME_PATTERN) + 3);
262  avio_write(pb, ES_NAME_PATTERN, sizeof(ES_NAME_PATTERN) - 1);
263  avio_wb16(pb, sc->media_info);
264  avio_w8(pb, 0);
265 
266  switch (sc->track_type) {
267  case 3: /* timecode */
268  gxf_write_timecode_auxiliary(pb, gxf);
269  break;
270  case 4: /* MPEG2 */
271  case 9: /* MPEG1 */
272  gxf_write_mpeg_auxiliary(pb, s->streams[index]);
273  break;
274  case 5: /* DV25 */
275  case 6: /* DV50 */
276  gxf_write_dv_auxiliary(pb, s->streams[index]);
277  break;
278  default:
279  avio_w8(pb, TRACK_AUX);
280  avio_w8(pb, 8);
281  avio_wl64(pb, 0);
282  }
283 
284  /* file system version */
285  avio_w8(pb, TRACK_VER);
286  avio_w8(pb, 4);
287  avio_wb32(pb, 0);
288 
289  /* frame rate */
290  avio_w8(pb, TRACK_FPS);
291  avio_w8(pb, 4);
292  avio_wb32(pb, sc->frame_rate_index);
293 
294  /* lines per frame */
295  avio_w8(pb, TRACK_LINES);
296  avio_w8(pb, 4);
297  avio_wb32(pb, sc->lines_index);
298 
299  /* fields per frame */
300  avio_w8(pb, TRACK_FPF);
301  avio_w8(pb, 4);
302  avio_wb32(pb, sc->fields);
303 
304  return update_size(pb, pos);
305 }
306 
307 static int gxf_write_material_data_section(AVFormatContext *s)
308 {
309  GXFContext *gxf = s->priv_data;
310  AVIOContext *pb = s->pb;
311  int64_t pos;
312  int len;
313  const char *filename = strrchr(s->url, '/');
314 
315  pos = avio_tell(pb);
316  avio_wb16(pb, 0); /* size */
317 
318  /* name */
319  if (filename)
320  filename++;
321  else
322  filename = s->url;
323  len = strlen(filename);
324 
325  avio_w8(pb, MAT_NAME);
326  avio_w8(pb, strlen(SERVER_PATH) + len + 1);
327  avio_write(pb, SERVER_PATH, sizeof(SERVER_PATH) - 1);
328  avio_write(pb, filename, len);
329  avio_w8(pb, 0);
330 
331  /* first field */
332  avio_w8(pb, MAT_FIRST_FIELD);
333  avio_w8(pb, 4);
334  avio_wb32(pb, 0);
335 
336  /* last field */
337  avio_w8(pb, MAT_LAST_FIELD);
338  avio_w8(pb, 4);
339  avio_wb32(pb, gxf->nb_fields);
340 
341  /* reserved */
342  avio_w8(pb, MAT_MARK_IN);
343  avio_w8(pb, 4);
344  avio_wb32(pb, 0);
345 
346  avio_w8(pb, MAT_MARK_OUT);
347  avio_w8(pb, 4);
348  avio_wb32(pb, gxf->nb_fields);
349 
350  /* estimated size */
351  avio_w8(pb, MAT_SIZE);
352  avio_w8(pb, 4);
353  avio_wb32(pb, avio_size(pb) / 1024);
354 
355  return update_size(pb, pos);
356 }
357 
358 static int gxf_write_track_description_section(AVFormatContext *s)
359 {
360  GXFContext *gxf = s->priv_data;
361  AVIOContext *pb = s->pb;
362  int64_t pos;
363  int i;
364 
365  pos = avio_tell(pb);
366  avio_wb16(pb, 0); /* size */
367  for (i = 0; i < s->nb_streams; ++i)
368  gxf_write_track_description(s, s->streams[i]->priv_data, i);
369 
370  gxf_write_track_description(s, &gxf->timecode_track, s->nb_streams);
371 
372  return update_size(pb, pos);
373 }
374 
375 static int gxf_write_map_packet(AVFormatContext *s, int rewrite)
376 {
377  GXFContext *gxf = s->priv_data;
378  AVIOContext *pb = s->pb;
379  int64_t pos = avio_tell(pb);
380 
381  if (!rewrite) {
382  if (!(gxf->map_offsets_nb % 30)) {
383  int err;
384  if ((err = av_reallocp_array(&gxf->map_offsets,
385  gxf->map_offsets_nb + 30,
386  sizeof(*gxf->map_offsets))) < 0) {
387  gxf->map_offsets_nb = 0;
388  av_log(s, AV_LOG_ERROR, "could not realloc map offsets\n");
389  return err;
390  }
391  }
392  gxf->map_offsets[gxf->map_offsets_nb++] = pos; // do not increment here
393  }
394 
395  gxf_write_packet_header(pb, PKT_MAP);
396 
397  /* preamble */
398  avio_w8(pb, 0xE0); /* version */
399  avio_w8(pb, 0xFF); /* reserved */
400 
401  gxf_write_material_data_section(s);
402  gxf_write_track_description_section(s);
403 
404  return update_packet_size(pb, pos);
405 }
406 
407 static int gxf_write_flt_packet(AVFormatContext *s)
408 {
409  GXFContext *gxf = s->priv_data;
410  AVIOContext *pb = s->pb;
411  int64_t pos = avio_tell(pb);
412  int fields_per_flt = (gxf->nb_fields+1) / 1000 + 1;
413  int flt_entries = gxf->nb_fields / fields_per_flt;
414  int i = 0;
415 
416  gxf_write_packet_header(pb, PKT_FLT);
417 
418  avio_wl32(pb, fields_per_flt); /* number of fields */
419  avio_wl32(pb, flt_entries); /* number of active flt entries */
420 
421  if (gxf->flt_entries) {
422  for (i = 0; i < flt_entries; i++)
423  avio_wl32(pb, gxf->flt_entries[(i*fields_per_flt)>>1]);
424  }
425 
426  ffio_fill(pb, 0, (1000 - i) * 4);
427 
428  return update_packet_size(pb, pos);
429 }
430 
431 static int gxf_write_umf_material_description(AVFormatContext *s)
432 {
433  GXFContext *gxf = s->priv_data;
434  AVIOContext *pb = s->pb;
435  int timecode_base = gxf->time_base.den == 60000 ? 60 : 50;
436  int64_t timestamp = 0;
437  uint64_t nb_fields;
438  uint32_t timecode_in; // timecode at mark in
439  uint32_t timecode_out; // timecode at mark out
440 
441  ff_parse_creation_time_metadata(s, &timestamp, 1);
442 
443  timecode_in = GXF_TIMECODE(gxf->tc.color, gxf->tc.drop,
444  gxf->tc.hh, gxf->tc.mm,
445  gxf->tc.ss, gxf->tc.ff);
446 
447  nb_fields = gxf->nb_fields +
448  gxf->tc.hh * (timecode_base * 3600) +
449  gxf->tc.mm * (timecode_base * 60) +
450  gxf->tc.ss * timecode_base +
451  gxf->tc.ff;
452 
453  timecode_out = GXF_TIMECODE(gxf->tc.color, gxf->tc.drop,
454  nb_fields / (timecode_base * 3600) % 24,
455  nb_fields / (timecode_base * 60) % 60,
456  nb_fields / timecode_base % 60,
457  nb_fields % timecode_base);
458 
459  avio_wl32(pb, gxf->flags);
460  avio_wl32(pb, gxf->nb_fields); /* length of the longest track */
461  avio_wl32(pb, gxf->nb_fields); /* length of the shortest track */
462  avio_wl32(pb, 0); /* mark in */
463  avio_wl32(pb, gxf->nb_fields); /* mark out */
464  avio_wl32(pb, timecode_in); /* timecode mark in */
465  avio_wl32(pb, timecode_out); /* timecode mark out */
466  avio_wl64(pb, timestamp); /* modification time */
467  avio_wl64(pb, timestamp); /* creation time */
468  avio_wl16(pb, 0); /* reserved */
469  avio_wl16(pb, 0); /* reserved */
470  avio_wl16(pb, gxf->audio_tracks);
471  avio_wl16(pb, 1); /* timecode track count */
472  avio_wl16(pb, 0); /* reserved */
473  avio_wl16(pb, gxf->mpeg_tracks);
474  return 48;
475 }
476 
477 static int gxf_write_umf_payload(AVFormatContext *s)
478 {
479  GXFContext *gxf = s->priv_data;
480  AVIOContext *pb = s->pb;
481 
482  avio_wl32(pb, gxf->umf_length); /* total length of the umf data */
483  avio_wl32(pb, 3); /* version */
484  avio_wl32(pb, s->nb_streams+1);
485  avio_wl32(pb, gxf->umf_track_offset); /* umf track section offset */
486  avio_wl32(pb, gxf->umf_track_size);
487  avio_wl32(pb, s->nb_streams+1);
488  avio_wl32(pb, gxf->umf_media_offset);
489  avio_wl32(pb, gxf->umf_media_size);
490  avio_wl32(pb, gxf->umf_length); /* user data offset */
491  avio_wl32(pb, 0); /* user data size */
492  avio_wl32(pb, 0); /* reserved */
493  avio_wl32(pb, 0); /* reserved */
494  return 48;
495 }
496 
497 static int gxf_write_umf_track_description(AVFormatContext *s)
498 {
499  AVIOContext *pb = s->pb;
500  GXFContext *gxf = s->priv_data;
501  int64_t pos = avio_tell(pb);
502  int i;
503 
504  gxf->umf_track_offset = pos - gxf->umf_start_offset;
505  for (i = 0; i < s->nb_streams; ++i) {
506  GXFStreamContext *sc = s->streams[i]->priv_data;
507  avio_wl16(pb, sc->media_info);
508  avio_wl16(pb, 1);
509  }
510 
511  avio_wl16(pb, gxf->timecode_track.media_info);
512  avio_wl16(pb, 1);
513 
514  return avio_tell(pb) - pos;
515 }
516 
517 static int gxf_write_umf_media_mpeg(AVIOContext *pb, AVStream *st)
518 {
519  GXFStreamContext *sc = st->priv_data;
520 
521  if (st->codecpar->format == AV_PIX_FMT_YUV422P)
522  avio_wl32(pb, 2);
523  else
524  avio_wl32(pb, 1); /* default to 420 */
525  avio_wl32(pb, sc->first_gop_closed == 1); /* closed = 1, open = 0, unknown = 255 */
526  avio_wl32(pb, 3); /* top = 1, bottom = 2, frame = 3, unknown = 0 */
527  avio_wl32(pb, 1); /* I picture per GOP */
528  avio_wl32(pb, sc->p_per_gop);
529  avio_wl32(pb, sc->b_per_i_or_p);
530  if (st->codecpar->codec_id == AV_CODEC_ID_MPEG2VIDEO)
531  avio_wl32(pb, 2);
532  else if (st->codecpar->codec_id == AV_CODEC_ID_MPEG1VIDEO)
533  avio_wl32(pb, 1);
534  else
535  avio_wl32(pb, 0);
536  avio_wl32(pb, 0); /* reserved */
537  return 32;
538 }
539 
540 static int gxf_write_umf_media_timecode(AVIOContext *pb, int drop)
541 {
542  avio_wl32(pb, drop); /* drop frame */
543  ffio_fill(pb, 0, 7 * 4); /* reserved */
544  return 32;
545 }
546 
547 static int gxf_write_umf_media_dv(AVIOContext *pb, GXFStreamContext *sc, AVStream *st)
548 {
549  int dv_umf_data = 0;
550 
551  if (st->codecpar->format == AV_PIX_FMT_YUV420P)
552  dv_umf_data |= 0x20; /* marks as DVCAM instead of DVPRO */
553  avio_wl32(pb, dv_umf_data);
554  ffio_fill(pb, 0, 7 * 4);
555  return 32;
556 }
557 
558 static int gxf_write_umf_media_audio(AVIOContext *pb, GXFStreamContext *sc)
559 {
560  avio_wl64(pb, av_double2int(1)); /* sound level to begin to */
561  avio_wl64(pb, av_double2int(1)); /* sound level to begin to */
562  avio_wl32(pb, 0); /* number of fields over which to ramp up sound level */
563  avio_wl32(pb, 0); /* number of fields over which to ramp down sound level */
564  avio_wl32(pb, 0); /* reserved */
565  avio_wl32(pb, 0); /* reserved */
566  return 32;
567 }
568 
569 static int gxf_write_umf_media_description(AVFormatContext *s)
570 {
571  GXFContext *gxf = s->priv_data;
572  AVIOContext *pb = s->pb;
573  int64_t pos;
574 
575  pos = avio_tell(pb);
576  gxf->umf_media_offset = pos - gxf->umf_start_offset;
577  for (unsigned i = 0; i <= s->nb_streams; ++i) {
578  GXFStreamContext *sc;
579  int64_t startpos, curpos;
580 
581  if (i == s->nb_streams)
582  sc = &gxf->timecode_track;
583  else
584  sc = s->streams[i]->priv_data;
585 
586  startpos = avio_tell(pb);
587  avio_wl16(pb, 0); /* length */
588  avio_wl16(pb, sc->media_info);
589  avio_wl16(pb, 0); /* reserved */
590  avio_wl16(pb, 0); /* reserved */
591  avio_wl32(pb, gxf->nb_fields);
592  avio_wl32(pb, 0); /* attributes rw, ro */
593  avio_wl32(pb, 0); /* mark in */
594  avio_wl32(pb, gxf->nb_fields); /* mark out */
595  avio_write(pb, ES_NAME_PATTERN, strlen(ES_NAME_PATTERN));
596  avio_wb16(pb, sc->media_info);
597  ffio_fill(pb, 0, 88 - (strlen(ES_NAME_PATTERN) + 2));
598  avio_wl32(pb, sc->track_type);
599  avio_wl32(pb, sc->sample_rate);
600  avio_wl32(pb, sc->sample_size);
601  avio_wl32(pb, 0); /* reserved */
602 
603  if (sc == &gxf->timecode_track)
604  gxf_write_umf_media_timecode(pb, gxf->tc.drop);
605  else {
606  AVStream *st = s->streams[i];
607  switch (st->codecpar->codec_id) {
608  case AV_CODEC_ID_MPEG1VIDEO:
609  case AV_CODEC_ID_MPEG2VIDEO:
610  gxf_write_umf_media_mpeg(pb, st);
611  break;
612  case AV_CODEC_ID_PCM_S16LE:
613  gxf_write_umf_media_audio(pb, sc);
614  break;
615  case AV_CODEC_ID_DVVIDEO:
616  gxf_write_umf_media_dv(pb, sc, st);
617  break;
618  }
619  }
620 
621  curpos = avio_tell(pb);
622  avio_seek(pb, startpos, SEEK_SET);
623  avio_wl16(pb, curpos - startpos);
624  avio_seek(pb, curpos, SEEK_SET);
625  }
626  return avio_tell(pb) - pos;
627 }
628 
629 static int gxf_write_umf_packet(AVFormatContext *s)
630 {
631  GXFContext *gxf = s->priv_data;
632  AVIOContext *pb = s->pb;
633  int64_t pos = avio_tell(pb);
634 
635  gxf_write_packet_header(pb, PKT_UMF);
636 
637  /* preamble */
638  avio_w8(pb, 3); /* first and last (only) packet */
639  avio_wb32(pb, gxf->umf_length); /* data length */
640 
641  gxf->umf_start_offset = avio_tell(pb);
642  gxf_write_umf_payload(s);
643  gxf_write_umf_material_description(s);
644  gxf->umf_track_size = gxf_write_umf_track_description(s);
645  gxf->umf_media_size = gxf_write_umf_media_description(s);
646  gxf->umf_length = avio_tell(pb) - gxf->umf_start_offset;
647  return update_packet_size(pb, pos);
648 }
649 
650 static void gxf_init_timecode_track(GXFStreamContext *sc, GXFStreamContext *vsc)
651 {
652  if (!vsc)
653  return;
654 
655  sc->media_type = vsc->sample_rate == 60 ? 7 : 8;
656  sc->sample_rate = vsc->sample_rate;
657  sc->media_info = ('T'<<8) | '0';
658  sc->track_type = 3;
659  sc->frame_rate_index = vsc->frame_rate_index;
660  sc->lines_index = vsc->lines_index;
661  sc->sample_size = 16;
662  sc->fields = vsc->fields;
663 }
664 
665 static int gxf_init_timecode(AVFormatContext *s, GXFTimecode *tc, const char *tcstr, int fields)
666 {
667  char c;
668 
669  if (sscanf(tcstr, "%d:%d:%d%c%d", &tc->hh, &tc->mm, &tc->ss, &c, &tc->ff) != 5) {
670  av_log(s, AV_LOG_ERROR, "unable to parse timecode, "
671  "syntax: hh:mm:ss[:;.]ff\n");
672  return -1;
673  }
674 
675  tc->color = 0;
676  tc->drop = c != ':';
677 
678  if (fields == 2)
679  tc->ff = tc->ff * 2;
680 
681  return 0;
682 }
683 
684 static int gxf_write_header(AVFormatContext *s)
685 {
686  AVIOContext *pb = s->pb;
687  GXFContext *gxf = s->priv_data;
688  GXFStreamContext *vsc = NULL;
689  uint8_t tracks[255] = {0};
690  int i, media_info = 0;
691  int ret;
692  AVDictionaryEntry *tcr = av_dict_get(s->metadata, "timecode", NULL, 0);
693 
694  if (!(pb->seekable & AVIO_SEEKABLE_NORMAL)) {
695  av_log(s, AV_LOG_ERROR, "gxf muxer does not support streamed output, patch welcome\n");
696  return AVERROR_PATCHWELCOME;
697  }
698 
699  gxf->flags |= 0x00080000; /* material is simple clip */
700  for (i = 0; i < s->nb_streams; ++i) {
701  AVStream *st = s->streams[i];
702  GXFStreamContext *sc = av_mallocz(sizeof(*sc));
703  if (!sc)
704  return AVERROR(ENOMEM);
705  st->priv_data = sc;
706 
707  sc->media_type = ff_codec_get_tag(gxf_media_types, st->codecpar->codec_id);
708  if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO) {
709  if (st->codecpar->codec_id != AV_CODEC_ID_PCM_S16LE) {
710  av_log(s, AV_LOG_ERROR, "only 16 BIT PCM LE allowed for now\n");
711  return AVERROR(EINVAL);
712  }
713  if (st->codecpar->sample_rate != 48000) {
714  av_log(s, AV_LOG_ERROR, "only 48000hz sampling rate is allowed\n");
715  return AVERROR(EINVAL);
716  }
717  if (st->codecpar->ch_layout.nb_channels != 1) {
718  av_log(s, AV_LOG_ERROR, "only mono tracks are allowed\n");
719  return AVERROR(EINVAL);
720  }
721  ret = ff_stream_add_bitstream_filter(st, "pcm_rechunk", "n="AV_STRINGIFY(GXF_SAMPLES_PER_FRAME));
722  if (ret < 0)
723  return ret;
724  sc->track_type = 2;
725  sc->sample_rate = st->codecpar->sample_rate;
726  avpriv_set_pts_info(st, 64, 1, sc->sample_rate);
727  sc->sample_size = 16;
728  sc->frame_rate_index = -2;
729  sc->lines_index = -2;
730  sc->fields = -2;
731  gxf->audio_tracks++;
732  gxf->flags |= 0x04000000; /* audio is 16 bit pcm */
733  media_info = 'A';
734  } else if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
735  if (i != 0) {
736  av_log(s, AV_LOG_ERROR, "video stream must be the first track\n");
737  return AVERROR(EINVAL);
738  }
739  /* FIXME check from time_base ? */
740  if (st->codecpar->height == 480 || st->codecpar->height == 512) { /* NTSC or NTSC+VBI */
741  sc->frame_rate_index = 5;
742  sc->sample_rate = 60;
743  gxf->flags |= 0x00000080;
744  gxf->time_base = (AVRational){ 1001, 60000 };
745  } else if (st->codecpar->height == 576 || st->codecpar->height == 608) { /* PAL or PAL+VBI */
746  sc->frame_rate_index = 6;
747  sc->media_type++;
748  sc->sample_rate = 50;
749  gxf->flags |= 0x00000040;
750  gxf->time_base = (AVRational){ 1, 50 };
751  } else {
752  av_log(s, AV_LOG_ERROR, "unsupported video resolution, "
753  "gxf muxer only accepts PAL or NTSC resolutions currently\n");
754  return AVERROR(EINVAL);
755  }
756  if (!tcr)
757  tcr = av_dict_get(st->metadata, "timecode", NULL, 0);
758  avpriv_set_pts_info(st, 64, gxf->time_base.num, gxf->time_base.den);
759  if (gxf_find_lines_index(st) < 0)
760  sc->lines_index = -1;
761  sc->sample_size = st->codecpar->bit_rate;
762  sc->fields = 2; /* interlaced */
763 
764  vsc = sc;
765 
766  switch (st->codecpar->codec_id) {
767  case AV_CODEC_ID_MJPEG:
768  sc->track_type = 1;
769  gxf->flags |= 0x00004000;
770  media_info = 'J';
771  break;
772  case AV_CODEC_ID_MPEG1VIDEO:
773  sc->track_type = 9;
774  gxf->mpeg_tracks++;
775  media_info = 'L';
776  break;
777  case AV_CODEC_ID_MPEG2VIDEO:
778  sc->first_gop_closed = -1;
779  sc->track_type = 4;
780  gxf->mpeg_tracks++;
781  gxf->flags |= 0x00008000;
782  media_info = 'M';
783  break;
784  case AV_CODEC_ID_DVVIDEO:
785  if (st->codecpar->format == AV_PIX_FMT_YUV422P) {
786  sc->media_type += 2;
787  sc->track_type = 6;
788  gxf->flags |= 0x00002000;
789  media_info = 'E';
790  } else {
791  sc->track_type = 5;
792  gxf->flags |= 0x00001000;
793  media_info = 'D';
794  }
795  break;
796  default:
797  av_log(s, AV_LOG_ERROR, "video codec not supported\n");
798  return -1;
799  }
800  }
801  /* FIXME first 10 audio tracks are 0 to 9 next 22 are A to V */
802  sc->media_info = media_info<<8 | ('0'+tracks[media_info]++);
803  sc->order = s->nb_streams - st->index;
804  }
805 
806  if (tcr && vsc)
807  gxf_init_timecode(s, &gxf->tc, tcr->value, vsc->fields);
808 
809  gxf_init_timecode_track(&gxf->timecode_track, vsc);
810  gxf->flags |= 0x200000; // time code track is non-drop frame
811 
812  if ((ret = gxf_write_map_packet(s, 0)) < 0)
813  return ret;
814  gxf_write_flt_packet(s);
815  gxf_write_umf_packet(s);
816 
817  gxf->packet_count = 3;
818 
819  return 0;
820 }
821 
822 static int gxf_write_eos_packet(AVIOContext *pb)
823 {
824  int64_t pos = avio_tell(pb);
825 
826  gxf_write_packet_header(pb, PKT_EOS);
827  return update_packet_size(pb, pos);
828 }
829 
830 static int gxf_write_trailer(AVFormatContext *s)
831 {
832  GXFContext *gxf = s->priv_data;
833  AVIOContext *pb = s->pb;
834  int64_t end;
835  int i;
836  int ret;
837 
838  gxf_write_eos_packet(pb);
839  end = avio_tell(pb);
840  avio_seek(pb, 0, SEEK_SET);
841  /* overwrite map, flt and umf packets with new values */
842  if ((ret = gxf_write_map_packet(s, 1)) < 0)
843  return ret;
844  gxf_write_flt_packet(s);
845  gxf_write_umf_packet(s);
846  /* update duration in all map packets */
847  for (i = 1; i < gxf->map_offsets_nb; i++) {
848  avio_seek(pb, gxf->map_offsets[i], SEEK_SET);
849  if ((ret = gxf_write_map_packet(s, 1)) < 0)
850  return ret;
851  }
852 
853  avio_seek(pb, end, SEEK_SET);
854 
855  return 0;
856 }
857 
858 static void gxf_deinit(AVFormatContext *s)
859 {
860  GXFContext *gxf = s->priv_data;
861 
862  av_freep(&gxf->flt_entries);
863  av_freep(&gxf->map_offsets);
864 }
865 
866 static int gxf_parse_mpeg_frame(GXFStreamContext *sc, const uint8_t *buf, int size)
867 {
868  uint32_t c=-1;
869  int i;
870  for(i=0; i<size-4 && c!=0x100; i++){
871  c = (c<<8) + buf[i];
872  if(c == 0x1B8 && sc->first_gop_closed == -1) /* GOP start code */
873  sc->first_gop_closed= (buf[i+4]>>6)&1;
874  }
875  return (buf[i+1]>>3)&7;
876 }
877 
878 static int gxf_write_media_preamble(AVFormatContext *s, AVPacket *pkt, int size)
879 {
880  GXFContext *gxf = s->priv_data;
881  AVIOContext *pb = s->pb;
882  AVStream *st = s->streams[pkt->stream_index];
883  GXFStreamContext *sc = st->priv_data;
884  unsigned field_nb;
885  /* If the video is frame-encoded, the frame numbers shall be represented by
886  * even field numbers.
887  * see SMPTE360M-2004 6.4.2.1.3 Media field number */
888  if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
889  field_nb = gxf->nb_fields;
890  } else {
891  field_nb = av_rescale_rnd(pkt->dts, gxf->time_base.den,
892  (int64_t)48000*gxf->time_base.num, AV_ROUND_UP);
893  }
894 
895  avio_w8(pb, sc->media_type);
896  avio_w8(pb, st->index);
897  avio_wb32(pb, field_nb);
898  if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO) {
899  avio_wb16(pb, 0);
900  avio_wb16(pb, size / 2);
901  } else if (st->codecpar->codec_id == AV_CODEC_ID_MPEG2VIDEO) {
902  int frame_type = gxf_parse_mpeg_frame(sc, pkt->data, pkt->size);
903  if (frame_type == AV_PICTURE_TYPE_I) {
904  avio_w8(pb, 0x0d);
905  sc->iframes++;
906  } else if (frame_type == AV_PICTURE_TYPE_B) {
907  avio_w8(pb, 0x0f);
908  sc->bframes++;
909  } else {
910  avio_w8(pb, 0x0e);
911  sc->pframes++;
912  }
913  avio_wb24(pb, size);
914  } else if (st->codecpar->codec_id == AV_CODEC_ID_DVVIDEO) {
915  avio_w8(pb, size / 4096);
916  avio_wb24(pb, 0);
917  } else
918  avio_wb32(pb, size);
919  avio_wb32(pb, field_nb);
920  avio_w8(pb, 1); /* flags */
921  avio_w8(pb, 0); /* reserved */
922  return 16;
923 }
924 
925 static int gxf_write_packet(AVFormatContext *s, AVPacket *pkt)
926 {
927  GXFContext *gxf = s->priv_data;
928  AVIOContext *pb = s->pb;
929  AVStream *st = s->streams[pkt->stream_index];
930  int64_t pos = avio_tell(pb);
931  int padding = 0;
932  unsigned packet_start_offset = avio_tell(pb) / 1024;
933  int ret;
934 
935  gxf_write_packet_header(pb, PKT_MEDIA);
936  if (st->codecpar->codec_id == AV_CODEC_ID_MPEG2VIDEO && pkt->size % 4) /* MPEG-2 frames must be padded */
937  padding = 4 - pkt->size % 4;
938  else if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO)
939  padding = GXF_AUDIO_PACKET_SIZE - pkt->size;
940  gxf_write_media_preamble(s, pkt, pkt->size + padding);
941  avio_write(pb, pkt->data, pkt->size);
942  gxf_write_padding(pb, padding);
943 
944  if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO) {
945  if (!(gxf->flt_entries_nb % 500)) {
946  int err;
947  if ((err = av_reallocp_array(&gxf->flt_entries,
948  gxf->flt_entries_nb + 500,
949  sizeof(*gxf->flt_entries))) < 0) {
950  gxf->flt_entries_nb = 0;
951  gxf->nb_fields = 0;
952  av_log(s, AV_LOG_ERROR, "could not reallocate flt entries\n");
953  return err;
954  }
955  }
956  gxf->flt_entries[gxf->flt_entries_nb++] = packet_start_offset;
957  gxf->nb_fields += 2; // count fields
958  }
959 
960  update_packet_size(pb, pos);
961 
962  gxf->packet_count++;
963  if (gxf->packet_count == 100) {
964  if ((ret = gxf_write_map_packet(s, 0)) < 0)
965  return ret;
966  gxf->packet_count = 0;
967  }
968 
969  return 0;
970 }
971 
972 static int gxf_compare_field_nb(AVFormatContext *s, const AVPacket *next,
973  const AVPacket *cur)
974 {
975  GXFContext *gxf = s->priv_data;
976  const AVPacket *pkt[2] = { cur, next };
977  int i, field_nb[2];
978  GXFStreamContext *sc[2];
979 
980  for (i = 0; i < 2; i++) {
981  AVStream *st = s->streams[pkt[i]->stream_index];
982  sc[i] = st->priv_data;
983  if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO) {
984  field_nb[i] = av_rescale_rnd(pkt[i]->dts, gxf->time_base.den,
985  (int64_t)48000*gxf->time_base.num, AV_ROUND_UP);
986  field_nb[i] &= ~1; // compare against even field number because audio must be before video
987  } else
988  field_nb[i] = pkt[i]->dts; // dts are field based
989  }
990 
991  return field_nb[1] > field_nb[0] ||
992  (field_nb[1] == field_nb[0] && sc[1]->order > sc[0]->order);
993 }
994 
995 static int gxf_interleave_packet(AVFormatContext *s, AVPacket *pkt,
996  int flush, int has_packet)
997 {
998  int ret;
999  if (has_packet) {
1000  AVStream *st = s->streams[pkt->stream_index];
1001  GXFStreamContext *sc = st->priv_data;
1002  if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO)
1003  pkt->pts = pkt->dts = sc->pkt_cnt * 2; // enforce 2 fields
1004  else
1005  pkt->pts = pkt->dts = sc->pkt_cnt * GXF_SAMPLES_PER_FRAME;
1006  sc->pkt_cnt++;
1007  if ((ret = ff_interleave_add_packet(s, pkt, gxf_compare_field_nb)) < 0)
1008  return ret;
1009  }
1010  return ff_interleave_packet_per_dts(s, pkt, flush, 0);
1011 }
1012 
1013 const FFOutputFormat ff_gxf_muxer = {
1014  .p.name = "gxf",
1015  .p.long_name = NULL_IF_CONFIG_SMALL("GXF (General eXchange Format)"),
1016  .p.extensions = "gxf",
1017  .priv_data_size = sizeof(GXFContext),
1018  .p.audio_codec = AV_CODEC_ID_PCM_S16LE,
1019  .p.video_codec = AV_CODEC_ID_MPEG2VIDEO,
1020  .write_header = gxf_write_header,
1021  .write_packet = gxf_write_packet,
1022  .write_trailer = gxf_write_trailer,
1023  .deinit = gxf_deinit,
1024  .interleave_packet = gxf_interleave_packet,
1025 };
AV_CODEC_ID_PCM_S16LE
@ AV_CODEC_ID_PCM_S16LE
Definition: codec_id.h:328
gxf_write_dv_auxiliary
static int gxf_write_dv_auxiliary(AVIOContext *pb, AVStream *st)
Definition: gxfenc.c:219
gxf_write_timecode_auxiliary
static int gxf_write_timecode_auxiliary(AVIOContext *pb, GXFContext *gxf)
Definition: gxfenc.c:232
gxf_write_mpeg_auxiliary
static int gxf_write_mpeg_auxiliary(AVIOContext *pb, AVStream *st)
Definition: gxfenc.c:180
GXFStreamContext::lines_index
int lines_index
Definition: gxfenc.c:55
AV_CODEC_ID_AC3
@ AV_CODEC_ID_AC3
Definition: codec_id.h:443
GXFStreamContext::sample_rate
uint32_t sample_rate
Definition: gxfenc.c:51
AVOutputFormat::name
const char * name
Definition: avformat.h:510
AVERROR
Filter the word “frame” indicates either a video frame or a group of audio as stored in an AVFrame structure Format for each input and each output the list of supported formats For video that means pixel format For audio that means channel sample they are references to shared objects When the negotiation mechanism computes the intersection of the formats supported at each end of a all references to both lists are replaced with a reference to the intersection And when a single format is eventually chosen for a link amongst the remaining all references to the list are updated That means that if a filter requires that its input and output have the same format amongst a supported all it has to do is use a reference to the same list of formats query_formats can leave some formats unset and return AVERROR(EAGAIN) to cause the negotiation mechanism toagain later. That can be used by filters with complex requirements to use the format negotiated on one link to set the formats supported on another. Frame references ownership and permissions
AVCodecParameters::codec_type
enum AVMediaType codec_type
General type of the encoded data.
Definition: codec_par.h:51
ff_interleave_packet_per_dts
int ff_interleave_packet_per_dts(AVFormatContext *s, AVPacket *pkt, int flush, int has_packet)
Interleave an AVPacket per dts so it can be muxed.
Definition: mux.c:959
update_size
static int64_t update_size(AVIOContext *pb, int64_t pos)
Definition: gxfenc.c:158
PKT_EOS
@ PKT_EOS
Definition: gxf.h:28
gxf_write_umf_media_dv
static int gxf_write_umf_media_dv(AVIOContext *pb, GXFStreamContext *sc, AVStream *st)
Definition: gxfenc.c:547
GXFTimecode
Definition: gxfenc.c:38
AVStream::priv_data
void * priv_data
Definition: avformat.h:768
TRACK_FPF
@ TRACK_FPF
Definition: gxf.h:49
GXFStreamContext::bframes
int bframes
Definition: gxfenc.c:59
TRACK_VER
@ TRACK_VER
Definition: gxf.h:45
GXFStreamContext::media_type
uint16_t media_type
Definition: gxfenc.c:52
GXFContext::map_offsets_nb
unsigned map_offsets_nb
Definition: gxfenc.c:84
AVPacket::data
uint8_t * data
Definition: packet.h:524
GXFContext::map_offsets
uint64_t * map_offsets
offset of map packets
Definition: gxfenc.c:83
TRACK_FPS
@ TRACK_FPS
Definition: gxf.h:47
ff_parse_creation_time_metadata
int ff_parse_creation_time_metadata(AVFormatContext *s, int64_t *timestamp, int return_seconds)
Parse creation_time in AVFormatContext metadata if exists and warn if the parsing fails.
Definition: mux_utils.c:138
avio_wl64
void avio_wl64(AVIOContext *s, uint64_t val)
Definition: aviobuf.c:425
GXFContext::umf_length
uint32_t umf_length
Definition: gxfenc.c:75
mathematics.h
GXFStreamContext::p_per_gop
int p_per_gop
Definition: gxfenc.c:60
gxf_write_umf_media_mpeg
static int gxf_write_umf_media_mpeg(AVIOContext *pb, AVStream *st)
Definition: gxfenc.c:517
AVChannelLayout::nb_channels
int nb_channels
Number of channels in this layout.
Definition: channel_layout.h:313
TRACK_LINES
@ TRACK_LINES
Definition: gxf.h:48
gxf_write_umf_packet
static int gxf_write_umf_packet(AVFormatContext *s)
Definition: gxfenc.c:629
intfloat.h
gxf_media_types
static const AVCodecTag gxf_media_types[]
Definition: gxfenc.c:100
avio_size
int64_t avio_size(AVIOContext *s)
Get the filesize.
Definition: aviobuf.c:323
FFOutputFormat::p
AVOutputFormat p
The public AVOutputFormat.
Definition: mux.h:65
gxf_write_header
static int gxf_write_header(AVFormatContext *s)
Definition: gxfenc.c:684
GXFContext::flt_entries_nb
unsigned flt_entries_nb
Definition: gxfenc.c:82
avio_wl16
void avio_wl16(AVIOContext *s, unsigned int val)
Definition: aviobuf.c:437
GXFStreamContext::b_per_i_or_p
int b_per_i_or_p
number of B-frames per I-frame or P-frame
Definition: gxfenc.c:61
gxf_parse_mpeg_frame
static int gxf_parse_mpeg_frame(GXFStreamContext *sc, const uint8_t *buf, int size)
Definition: gxfenc.c:866
avpriv_set_pts_info
void avpriv_set_pts_info(AVStream *st, int pts_wrap_bits, unsigned int pts_num, unsigned int pts_den)
Set the time base and wrapping info for a given stream.
Definition: avformat.c:853
gxf_write_packet
static int gxf_write_packet(AVFormatContext *s, AVPacket *pkt)
Definition: gxfenc.c:925
avio_tell
static av_always_inline int64_t avio_tell(AVIOContext *s)
ftell() equivalent for AVIOContext.
Definition: avio.h:494
PKT_MAP
@ PKT_MAP
Definition: gxf.h:26
type
it s the only field you need to keep assuming you have a context There is some magic you don t need to care about around this just let it vf type
Definition: writing_filters.txt:86
TRACK_AUX
@ TRACK_AUX
Definition: gxf.h:44
gxf_find_lines_index
static int gxf_find_lines_index(AVStream *st)
Definition: gxfenc.c:122
AV_ROUND_UP
@ AV_ROUND_UP
Round toward +infinity.
Definition: mathematics.h:134
GXFStreamContext::sample_size
uint32_t sample_size
Definition: gxfenc.c:50
gxf_init_timecode_track
static void gxf_init_timecode_track(GXFStreamContext *sc, GXFStreamContext *vsc)
Definition: gxfenc.c:650
AVRational::num
int num
Numerator.
Definition: rational.h:59
gxf_write_map_packet
static int gxf_write_map_packet(AVFormatContext *s, int rewrite)
Definition: gxfenc.c:375
avassert.h
PKT_UMF
@ PKT_UMF
Definition: gxf.h:30
pkt
AVPacket * pkt
Definition: movenc.c:60
AV_LOG_ERROR
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:180
AVCodecTag
Definition: internal.h:42
GXFContext::mpeg_tracks
uint16_t mpeg_tracks
Definition: gxfenc.c:70
av_dict_get
AVDictionaryEntry * av_dict_get(const AVDictionary *m, const char *key, const AVDictionaryEntry *prev, int flags)
Get a dictionary entry with matching key.
Definition: dict.c:62
MAT_NAME
@ MAT_NAME
Definition: gxf.h:34
s
#define s(width, name)
Definition: cbs_vp9.c:198
GXFContext::time_base
AVRational time_base
Definition: gxfenc.c:78
gxf_write_umf_media_audio
static int gxf_write_umf_media_audio(AVIOContext *pb, GXFStreamContext *sc)
Definition: gxfenc.c:558
AVMEDIA_TYPE_AUDIO
@ AVMEDIA_TYPE_AUDIO
Definition: avutil.h:202
GXFContext::umf_track_offset
uint32_t umf_track_offset
Definition: gxfenc.c:73
av_assert0
#define av_assert0(cond)
assert() equivalent, that is always enabled.
Definition: avassert.h:40
MAT_SIZE
@ MAT_SIZE
Definition: gxf.h:39
GXFStreamContext::pframes
int pframes
Definition: gxfenc.c:58
gxf_write_padding
static void gxf_write_padding(AVIOContext *pb, int64_t to_pad)
Definition: gxfenc.c:136
MAT_MARK_OUT
@ MAT_MARK_OUT
Definition: gxf.h:38
AV_PIX_FMT_YUV420P
@ AV_PIX_FMT_YUV420P
planar YUV 4:2:0, 12bpp, (1 Cr & Cb sample per 2x2 Y samples)
Definition: pixfmt.h:73
GXFContext::flags
int flags
Definition: gxfenc.c:79
MAT_FIRST_FIELD
@ MAT_FIRST_FIELD
Definition: gxf.h:35
fields
the definition of that something depends on the semantic of the filter The callback must examine the status of the filter s links and proceed accordingly The status of output links is stored in the status_in and status_out fields and tested by the then the processing requires a frame on this link and the filter is expected to make efforts in that direction The status of input links is stored by the fifo and status_out fields
Definition: filter_design.txt:155
AVFormatContext
Format I/O context.
Definition: avformat.h:1255
internal.h
AVStream::codecpar
AVCodecParameters * codecpar
Codec parameters associated with this stream.
Definition: avformat.h:766
AVClass
Describe the class of an AVClass context structure.
Definition: log.h:66
NULL
#define NULL
Definition: coverity.c:32
AVERROR_PATCHWELCOME
#define AVERROR_PATCHWELCOME
Not yet implemented in FFmpeg, patches welcome.
Definition: error.h:64
GXFContext::nb_fields
uint32_t nb_fields
Definition: gxfenc.c:68
GXFContext::creation_time
int64_t creation_time
Definition: gxfenc.c:71
AVRational
Rational number (pair of numerator and denominator).
Definition: rational.h:58
GXFContext::umf_track_size
uint16_t umf_track_size
Definition: gxfenc.c:76
AV_PICTURE_TYPE_I
@ AV_PICTURE_TYPE_I
Intra.
Definition: avutil.h:279
flush
void(* flush)(AVBSFContext *ctx)
Definition: dts2pts.c:368
MAT_LAST_FIELD
@ MAT_LAST_FIELD
Definition: gxf.h:36
AVStream::metadata
AVDictionary * metadata
Definition: avformat.h:823
FFOutputFormat
Definition: mux.h:61
avio_w8
void avio_w8(AVIOContext *s, int b)
Definition: aviobuf.c:179
ffio_fill
void ffio_fill(AVIOContext *s, int b, int64_t count)
Definition: aviobuf.c:187
AVCodecParameters::ch_layout
AVChannelLayout ch_layout
Audio only.
Definition: codec_par.h:180
gxf_write_umf_material_description
static int gxf_write_umf_material_description(AVFormatContext *s)
Definition: gxfenc.c:431
GXF_TIMECODE
#define GXF_TIMECODE(c, d, h, m, s, f)
Definition: gxfenc.c:35
index
int index
Definition: gxfenc.c:90
c
Undefined Behavior In the C some operations are like signed integer dereferencing freed accessing outside allocated Undefined Behavior must not occur in a C it is not safe even if the output of undefined operations is unused The unsafety may seem nit picking but Optimizing compilers have in fact optimized code on the assumption that no undefined Behavior occurs Optimizing code based on wrong assumptions can and has in some cases lead to effects beyond the output of computations The signed integer overflow problem in speed critical code Code which is highly optimized and works with signed integers sometimes has the problem that often the output of the computation does not c
Definition: undefined.txt:32
AVCodecParameters::sample_rate
int sample_rate
Audio only.
Definition: codec_par.h:184
AV_CODEC_ID_MPEG1VIDEO
@ AV_CODEC_ID_MPEG1VIDEO
Definition: codec_id.h:53
GXFContext::tc
GXFTimecode tc
Definition: gxfenc.c:86
gxf_write_material_data_section
static int gxf_write_material_data_section(AVFormatContext *s)
Definition: gxfenc.c:307
gxf_write_umf_media_timecode
static int gxf_write_umf_media_timecode(AVIOContext *pb, int drop)
Definition: gxfenc.c:540
av_rescale_rnd
int64_t av_rescale_rnd(int64_t a, int64_t b, int64_t c, enum AVRounding rnd)
Rescale a 64-bit integer with specified rounding.
Definition: mathematics.c:58
gxf_interleave_packet
static int gxf_interleave_packet(AVFormatContext *s, AVPacket *pkt, int flush, int has_packet)
Definition: gxfenc.c:995
AVIOContext
Bytestream IO Context.
Definition: avio.h:160
AV_CODEC_ID_PCM_S24LE
@ AV_CODEC_ID_PCM_S24LE
Definition: codec_id.h:340
GXFTimecode::color
int color
Definition: gxfenc.c:43
AVPacket::size
int size
Definition: packet.h:525
NULL_IF_CONFIG_SMALL
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification.
Definition: internal.h:94
gxf_write_trailer
static int gxf_write_trailer(AVFormatContext *s)
Definition: gxfenc.c:830
AVIOContext::seekable
int seekable
A combination of AVIO_SEEKABLE_ flags or 0 when the stream is not seekable.
Definition: avio.h:261
size
int size
Definition: twinvq_data.h:10344
GXFStreamContext::first_gop_closed
int first_gop_closed
Definition: gxfenc.c:62
gxf_write_track_description_section
static int gxf_write_track_description_section(AVFormatContext *s)
Definition: gxfenc.c:358
AVPacket::dts
int64_t dts
Decompression timestamp in AVStream->time_base units; the time at which the packet is decompressed.
Definition: packet.h:523
avio_write
void avio_write(AVIOContext *s, const unsigned char *buf, int size)
Definition: aviobuf.c:201
GXF_AUDIO_PACKET_SIZE
#define GXF_AUDIO_PACKET_SIZE
Definition: gxfenc.c:33
avio_wb32
void avio_wb32(AVIOContext *s, unsigned int val)
Definition: aviobuf.c:365
av_reallocp_array
int av_reallocp_array(void *ptr, size_t nmemb, size_t size)
Allocate, reallocate an array through a pointer to a pointer.
Definition: mem.c:225
avio_wl32
void avio_wl32(AVIOContext *s, unsigned int val)
Definition: aviobuf.c:357
gxf_init_timecode
static int gxf_init_timecode(AVFormatContext *s, GXFTimecode *tc, const char *tcstr, int fields)
Definition: gxfenc.c:665
GXFContext::umf_media_offset
uint32_t umf_media_offset
Definition: gxfenc.c:74
gxf.h
ES_NAME_PATTERN
#define ES_NAME_PATTERN
Definition: gxfenc.c:120
PKT_FLT
@ PKT_FLT
Definition: gxf.h:29
GXF_SAMPLES_PER_FRAME
#define GXF_SAMPLES_PER_FRAME
Definition: gxfenc.c:32
gxf_write_media_preamble
static int gxf_write_media_preamble(AVFormatContext *s, AVPacket *pkt, int size)
Definition: gxfenc.c:878
TRACK_NAME
@ TRACK_NAME
Definition: gxf.h:43
GXFContext::timecode_track
GXFStreamContext timecode_track
Definition: gxfenc.c:80
TRACK_MPG_AUX
@ TRACK_MPG_AUX
Definition: gxf.h:46
AV_CODEC_ID_MJPEG
@ AV_CODEC_ID_MJPEG
Definition: codec_id.h:59
av_double2int
static av_always_inline uint64_t av_double2int(double f)
Reinterpret a double as a 64-bit integer.
Definition: intfloat.h:70
GXFContext::umf_start_offset
uint32_t umf_start_offset
Definition: gxfenc.c:72
AV_CODEC_ID_NONE
@ AV_CODEC_ID_NONE
Definition: codec_id.h:50
GXFStreamContext::iframes
int iframes
Definition: gxfenc.c:57
i
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:256
AVPacket::pts
int64_t pts
Presentation timestamp in AVStream->time_base units; the time at which the decompressed packet will b...
Definition: packet.h:517
frame_type
frame_type
Definition: jpeg2000_parser.c:31
avio_internal.h
GXFContext::umf_media_size
uint16_t umf_media_size
Definition: gxfenc.c:77
AVCodecParameters::height
int height
Definition: codec_par.h:135
ff_interleave_add_packet
int ff_interleave_add_packet(AVFormatContext *s, AVPacket *pkt, int(*compare)(AVFormatContext *, const AVPacket *, const AVPacket *))
Add packet to an AVFormatContext's packet_buffer list, determining its interleaved position using com...
Definition: mux.c:855
gxf_write_umf_payload
static int gxf_write_umf_payload(AVFormatContext *s)
Definition: gxfenc.c:477
gxf_write_eos_packet
static int gxf_write_eos_packet(AVIOContext *pb)
Definition: gxfenc.c:822
AV_STRINGIFY
#define AV_STRINGIFY(s)
Definition: macros.h:66
AV_CODEC_ID_DVVIDEO
@ AV_CODEC_ID_DVVIDEO
Definition: codec_id.h:76
av_mallocz
void * av_mallocz(size_t size)
Allocate a memory block with alignment suitable for all memory accesses (including vectors if availab...
Definition: mem.c:256
GXFContext
Definition: gxfenc.c:66
len
int len
Definition: vorbis_enc_data.h:426
GXFTimecode::drop
int drop
Definition: gxfenc.c:44
GXFStreamContext::order
unsigned order
interleaving order
Definition: gxfenc.c:63
ret
ret
Definition: filter_design.txt:187
AVStream
Stream structure.
Definition: avformat.h:743
avio_seek
int64_t avio_seek(AVIOContext *s, int64_t offset, int whence)
fseek() equivalent for AVIOContext.
Definition: aviobuf.c:231
gxf_deinit
static void gxf_deinit(AVFormatContext *s)
Definition: gxfenc.c:858
GXFContext::av_class
AVClass * av_class
Definition: gxfenc.c:67
pos
unsigned int pos
Definition: spdifenc.c:414
avformat.h
GXFTimecode::hh
int hh
Definition: gxfenc.c:39
GXFTimecode::ss
int ss
Definition: gxfenc.c:41
GXFStreamContext::media_info
uint16_t media_info
Definition: gxfenc.c:53
GXFTimecode::ff
int ff
Definition: gxfenc.c:42
gxf_write_track_description
static int gxf_write_track_description(AVFormatContext *s, GXFStreamContext *sc, int index)
Definition: gxfenc.c:246
AVStream::index
int index
stream index in AVFormatContext
Definition: avformat.h:749
GXFStreamContext::frame_rate_index
int frame_rate_index
Definition: gxfenc.c:54
gxf_write_umf_media_description
static int gxf_write_umf_media_description(AVFormatContext *s)
Definition: gxfenc.c:569
MAT_MARK_IN
@ MAT_MARK_IN
Definition: gxf.h:37
GXFContext::flt_entries
unsigned * flt_entries
offsets of packets /1024, starts after 2nd video field
Definition: gxfenc.c:81
AVIO_SEEKABLE_NORMAL
#define AVIO_SEEKABLE_NORMAL
Seeking works like for a local file.
Definition: avio.h:41
AV_PICTURE_TYPE_B
@ AV_PICTURE_TYPE_B
Bi-dir predicted.
Definition: avutil.h:281
buffer
the frame and frame reference mechanism is intended to as much as expensive copies of that data while still allowing the filters to produce correct results The data is stored in buffers represented by AVFrame structures Several references can point to the same frame buffer
Definition: filter_design.txt:49
AVRational::den
int den
Denominator.
Definition: rational.h:60
SERVER_PATH
#define SERVER_PATH
Definition: gxfenc.c:119
ff_codec_get_tag
unsigned int ff_codec_get_tag(const AVCodecTag *tags, enum AVCodecID id)
Definition: utils.c:136
PKT_MEDIA
@ PKT_MEDIA
Definition: gxf.h:27
gxf_write_flt_packet
static int gxf_write_flt_packet(AVFormatContext *s)
Definition: gxfenc.c:407
GXFStreamContext::pkt_cnt
int64_t pkt_cnt
Definition: gxfenc.c:48
update_packet_size
static int64_t update_packet_size(AVIOContext *pb, int64_t pos)
Definition: gxfenc.c:141
gxf_write_packet_header
static void gxf_write_packet_header(AVIOContext *pb, GXFPktType type)
Definition: gxfenc.c:169
AVPacket::stream_index
int stream_index
Definition: packet.h:526
gxf_write_umf_track_description
static int gxf_write_umf_track_description(AVFormatContext *s)
Definition: gxfenc.c:497
GXFStreamContext
Definition: gxfenc.c:47
height
int height
Definition: gxfenc.c:90
tc
#define tc
Definition: regdef.h:69
AVMEDIA_TYPE_VIDEO
@ AVMEDIA_TYPE_VIDEO
Definition: avutil.h:201
AV_PIX_FMT_YUV422P
@ AV_PIX_FMT_YUV422P
planar YUV 4:2:2, 16bpp, (1 Cr & Cb sample per 2x1 Y samples)
Definition: pixfmt.h:77
mem.h
AVCodecParameters::format
int format
Definition: codec_par.h:92
avio_wb24
void avio_wb24(AVIOContext *s, unsigned int val)
Definition: aviobuf.c:455
GXFStreamContext::track_type
uint32_t track_type
Definition: gxfenc.c:49
GXFTimecode::mm
int mm
Definition: gxfenc.c:40
AVDictionaryEntry
Definition: dict.h:89
AVCodecParameters::codec_id
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
Definition: codec_par.h:55
AVPacket
This structure stores compressed data.
Definition: packet.h:501
av_freep
#define av_freep(p)
Definition: tableprint_vlc.h:34
GXFPktType
GXFPktType
Definition: gxf.h:25
avio_wb16
void avio_wb16(AVIOContext *s, unsigned int val)
Definition: aviobuf.c:443
ff_gxf_muxer
const FFOutputFormat ff_gxf_muxer
Definition: gxfenc.c:1013
AVCodecParameters::bit_rate
int64_t bit_rate
The average bitrate of the encoded data (in bits per second).
Definition: codec_par.h:97
av_log
#define av_log(a,...)
Definition: tableprint_vlc.h:27
gxf_compare_field_nb
static int gxf_compare_field_nb(AVFormatContext *s, const AVPacket *next, const AVPacket *cur)
Definition: gxfenc.c:972
GXFContext::audio_tracks
uint16_t audio_tracks
Definition: gxfenc.c:69
GXFStreamContext::fields
int fields
Definition: gxfenc.c:56
AVDictionaryEntry::value
char * value
Definition: dict.h:91
gxf_lines_tab
static const struct @325 gxf_lines_tab[]
AV_CODEC_ID_MPEG2VIDEO
@ AV_CODEC_ID_MPEG2VIDEO
preferred ID for MPEG-1/2 video decoding
Definition: codec_id.h:54
GXFContext::packet_count
unsigned packet_count
Definition: gxfenc.c:85
snprintf
#define snprintf
Definition: snprintf.h:34
ff_stream_add_bitstream_filter
int ff_stream_add_bitstream_filter(AVStream *st, const char *name, const char *args)
Add a bitstream filter to a stream.
Definition: mux.c:1351
mux.h
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