FFmpeg
r3d.c
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1 /*
2  * R3D REDCODE demuxer
3  * Copyright (c) 2008 Baptiste Coudurier <baptiste dot coudurier at gmail 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/intreadwrite.h"
23 #include "libavutil/dict.h"
24 #include "libavutil/mathematics.h"
25 #include "avformat.h"
26 #include "internal.h"
27 
28 typedef struct R3DContext {
30  unsigned rdvo_offset;
31 
33 } R3DContext;
34 
35 typedef struct Atom {
36  unsigned size;
37  uint32_t tag;
38  uint64_t offset;
39 } Atom;
40 
41 static int read_atom(AVFormatContext *s, Atom *atom)
42 {
43  atom->offset = avio_tell(s->pb);
44  atom->size = avio_rb32(s->pb);
45  if (atom->size < 8)
46  return -1;
47  atom->tag = avio_rl32(s->pb);
48  av_log(s, AV_LOG_TRACE, "atom %u %.4s offset %#"PRIx64"\n",
49  atom->size, (char*)&atom->tag, atom->offset);
50  return atom->size;
51 }
52 
54 {
56  R3DContext *r3d = s->priv_data;
57  char filename[258];
58  int tmp;
59  int ret;
60  int av_unused tmp2;
62 
63  if (!st)
64  return AVERROR(ENOMEM);
67 
68  tmp = avio_r8(s->pb); // major version
69  tmp2 = avio_r8(s->pb); // minor version
70  av_log(s, AV_LOG_TRACE, "version %d.%d\n", tmp, tmp2);
71 
72  tmp = avio_rb16(s->pb); // unknown
73  av_log(s, AV_LOG_TRACE, "unknown1 %d\n", tmp);
74 
75  tmp = avio_rb32(s->pb);
76  avpriv_set_pts_info(st, 32, 1, tmp);
77 
78  tmp = avio_rb32(s->pb); // filenum
79  av_log(s, AV_LOG_TRACE, "filenum %d\n", tmp);
80 
81  avio_skip(s->pb, 32); // unknown
82 
83  st->codecpar->width = avio_rb32(s->pb);
84  st->codecpar->height = avio_rb32(s->pb);
85 
86  tmp = avio_rb16(s->pb); // unknown
87  av_log(s, AV_LOG_TRACE, "unknown2 %d\n", tmp);
88 
89  framerate.num = avio_rb16(s->pb);
90  framerate.den = avio_rb16(s->pb);
91  if (framerate.num > 0 && framerate.den > 0) {
92 #if FF_API_R_FRAME_RATE
93  st->r_frame_rate =
94 #endif
96  }
97 
98  r3d->audio_channels = avio_r8(s->pb); // audio channels
99  av_log(s, AV_LOG_TRACE, "audio channels %d\n", tmp);
100 
101  ret = avio_read(s->pb, filename, 257);
102  if (ret < 257)
103  return ret < 0 ? ret : AVERROR_EOF;
104  filename[sizeof(filename)-1] = 0;
105  av_dict_set(&st->metadata, "filename", filename, 0);
106 
107  av_log(s, AV_LOG_TRACE, "filename %s\n", filename);
108  av_log(s, AV_LOG_TRACE, "resolution %dx%d\n", st->codecpar->width, st->codecpar->height);
109  av_log(s, AV_LOG_TRACE, "timescale %d\n", st->time_base.den);
110  av_log(s, AV_LOG_TRACE, "frame rate %d/%d\n",
111  framerate.num, framerate.den);
112 
113  return 0;
114 }
115 
116 static int r3d_read_rdvo(AVFormatContext *s, Atom *atom)
117 {
118  R3DContext *r3d = s->priv_data;
119  AVStream *st = s->streams[0];
120  int i;
121 
122  r3d->video_offsets_count = (atom->size - 8) / 4;
123 
124  for (i = 0; i < r3d->video_offsets_count; i++) {
125  unsigned video_offset = avio_rb32(s->pb);
126  if (!video_offset) {
127  r3d->video_offsets_count = i;
128  break;
129  }
130  av_log(s, AV_LOG_TRACE, "video offset %d: %#x\n", i, video_offset);
131  }
132 
133  if (st->avg_frame_rate.num)
136  st->time_base);
137  av_log(s, AV_LOG_TRACE, "duration %"PRId64"\n", st->duration);
138 
139  return 0;
140 }
141 
143 {
144  R3DContext *r3d = s->priv_data;
145  int av_unused tmp;
146 
147  r3d->rdvo_offset = avio_rb32(s->pb);
148  avio_rb32(s->pb); // rdvs offset
149  avio_rb32(s->pb); // rdao offset
150  avio_rb32(s->pb); // rdas offset
151 
152  tmp = avio_rb32(s->pb);
153  av_log(s, AV_LOG_TRACE, "num video chunks %d\n", tmp);
154 
155  tmp = avio_rb32(s->pb);
156  av_log(s, AV_LOG_TRACE, "num audio chunks %d\n", tmp);
157 
158  avio_skip(s->pb, 6*4);
159 }
160 
162 {
163  R3DContext *r3d = s->priv_data;
164  Atom atom;
165  int ret;
166 
167  if (read_atom(s, &atom) < 0) {
168  av_log(s, AV_LOG_ERROR, "error reading atom\n");
169  return -1;
170  }
171  if (atom.tag == MKTAG('R','E','D','1')) {
172  if ((ret = r3d_read_red1(s)) < 0) {
173  av_log(s, AV_LOG_ERROR, "error parsing 'red1' atom\n");
174  return ret;
175  }
176  } else {
177  av_log(s, AV_LOG_ERROR, "could not find 'red1' atom\n");
178  return -1;
179  }
180 
181  /* we cannot create the audio stream now because we do not know the
182  * sample rate */
183  if (r3d->audio_channels)
185 
186  s->internal->data_offset = avio_tell(s->pb);
187  av_log(s, AV_LOG_TRACE, "data offset %#"PRIx64"\n", s->internal->data_offset);
188  if (!(s->pb->seekable & AVIO_SEEKABLE_NORMAL))
189  return 0;
190  // find REOB/REOF/REOS to load index
191  avio_seek(s->pb, avio_size(s->pb)-48-8, SEEK_SET);
192  if (read_atom(s, &atom) < 0)
193  av_log(s, AV_LOG_ERROR, "error reading end atom\n");
194 
195  if (atom.tag != MKTAG('R','E','O','B') &&
196  atom.tag != MKTAG('R','E','O','F') &&
197  atom.tag != MKTAG('R','E','O','S'))
198  goto out;
199 
200  r3d_read_reos(s);
201 
202  if (r3d->rdvo_offset) {
203  avio_seek(s->pb, r3d->rdvo_offset, SEEK_SET);
204  if (read_atom(s, &atom) < 0)
205  av_log(s, AV_LOG_ERROR, "error reading 'rdvo' atom\n");
206  if (atom.tag == MKTAG('R','D','V','O')) {
207  if (r3d_read_rdvo(s, &atom) < 0)
208  av_log(s, AV_LOG_ERROR, "error parsing 'rdvo' atom\n");
209  }
210  }
211 
212  out:
213  avio_seek(s->pb, s->internal->data_offset, SEEK_SET);
214  return 0;
215 }
216 
218 {
219  AVStream *st = s->streams[0];
220  int tmp;
221  int av_unused tmp2;
222  int64_t pos = avio_tell(s->pb);
223  unsigned dts;
224  int ret;
225 
226  dts = avio_rb32(s->pb);
227 
228  tmp = avio_rb32(s->pb);
229  av_log(s, AV_LOG_TRACE, "frame num %d\n", tmp);
230 
231  tmp = avio_r8(s->pb); // major version
232  tmp2 = avio_r8(s->pb); // minor version
233  av_log(s, AV_LOG_TRACE, "version %d.%d\n", tmp, tmp2);
234 
235  tmp = avio_rb16(s->pb); // unknown
236  av_log(s, AV_LOG_TRACE, "unknown %d\n", tmp);
237 
238  if (tmp > 4) {
239  tmp = avio_rb16(s->pb); // unknown
240  av_log(s, AV_LOG_TRACE, "unknown %d\n", tmp);
241 
242  tmp = avio_rb16(s->pb); // unknown
243  av_log(s, AV_LOG_TRACE, "unknown %d\n", tmp);
244 
245  tmp = avio_rb32(s->pb);
246  av_log(s, AV_LOG_TRACE, "width %d\n", tmp);
247  tmp = avio_rb32(s->pb);
248  av_log(s, AV_LOG_TRACE, "height %d\n", tmp);
249 
250  tmp = avio_rb32(s->pb);
251  av_log(s, AV_LOG_TRACE, "metadata len %d\n", tmp);
252  }
253  tmp = atom->size - 8 - (avio_tell(s->pb) - pos);
254  if (tmp < 0)
255  return -1;
256  ret = av_get_packet(s->pb, pkt, tmp);
257  if (ret < 0) {
258  av_log(s, AV_LOG_ERROR, "error reading video packet\n");
259  return -1;
260  }
261 
262  pkt->stream_index = 0;
263  pkt->dts = dts;
264  if (st->avg_frame_rate.num)
265  pkt->duration = (uint64_t)st->time_base.den*
267  av_log(s, AV_LOG_TRACE, "pkt dts %"PRId64" duration %"PRId64"\n", pkt->dts, pkt->duration);
268 
269  return 0;
270 }
271 
273 {
274  R3DContext *r3d = s->priv_data;
275  AVStream *st;
276  int av_unused tmp, tmp2;
277  int samples, size;
278  int64_t pos = avio_tell(s->pb);
279  unsigned dts;
280  int ret;
281 
282  if (s->nb_streams < 2) {
283  st = avformat_new_stream(s, NULL);
284  if (!st)
285  return AVERROR(ENOMEM);
288  st->codecpar->channels = r3d->audio_channels;
289  avpriv_set_pts_info(st, 32, 1, s->streams[0]->time_base.den);
290  } else {
291  st = s->streams[1];
292  }
293 
294  dts = avio_rb32(s->pb);
295 
296  st->codecpar->sample_rate = avio_rb32(s->pb);
297  if (st->codecpar->sample_rate <= 0) {
298  av_log(s, AV_LOG_ERROR, "Bad sample rate\n");
299  return AVERROR_INVALIDDATA;
300  }
301 
302  samples = avio_rb32(s->pb);
303 
304  tmp = avio_rb32(s->pb);
305  av_log(s, AV_LOG_TRACE, "packet num %d\n", tmp);
306 
307  tmp = avio_rb16(s->pb); // unknown
308  av_log(s, AV_LOG_TRACE, "unknown %d\n", tmp);
309 
310  tmp = avio_r8(s->pb); // major version
311  tmp2 = avio_r8(s->pb); // minor version
312  av_log(s, AV_LOG_TRACE, "version %d.%d\n", tmp, tmp2);
313 
314  tmp = avio_rb32(s->pb); // unknown
315  av_log(s, AV_LOG_TRACE, "unknown %d\n", tmp);
316 
317  size = atom->size - 8 - (avio_tell(s->pb) - pos);
318  if (size < 0)
319  return -1;
320  ret = av_get_packet(s->pb, pkt, size);
321  if (ret < 0) {
322  av_log(s, AV_LOG_ERROR, "error reading audio packet\n");
323  return ret;
324  }
325 
326  pkt->stream_index = 1;
327  pkt->dts = dts;
328  if (st->codecpar->sample_rate)
329  pkt->duration = av_rescale(samples, st->time_base.den, st->codecpar->sample_rate);
330  av_log(s, AV_LOG_TRACE, "pkt dts %"PRId64" duration %"PRId64" samples %d sample rate %d\n",
331  pkt->dts, pkt->duration, samples, st->codecpar->sample_rate);
332 
333  return 0;
334 }
335 
337 {
338  R3DContext *r3d = s->priv_data;
339  Atom atom;
340  int err = 0;
341 
342  while (!err) {
343  if (read_atom(s, &atom) < 0) {
344  err = -1;
345  break;
346  }
347  switch (atom.tag) {
348  case MKTAG('R','E','D','V'):
349  if (s->streams[0]->discard == AVDISCARD_ALL)
350  goto skip;
351  if (!(err = r3d_read_redv(s, pkt, &atom)))
352  return 0;
353  break;
354  case MKTAG('R','E','D','A'):
355  if (!r3d->audio_channels)
356  return -1;
357  if (s->nb_streams >= 2 && s->streams[1]->discard == AVDISCARD_ALL)
358  goto skip;
359  if (!(err = r3d_read_reda(s, pkt, &atom)))
360  return 0;
361  break;
362  default:
363  skip:
364  avio_skip(s->pb, atom.size-8);
365  }
366  }
367  return err;
368 }
369 
370 static int r3d_probe(const AVProbeData *p)
371 {
372  if (AV_RL32(p->buf + 4) == MKTAG('R','E','D','1'))
373  return AVPROBE_SCORE_MAX;
374  return 0;
375 }
376 
377 static int r3d_seek(AVFormatContext *s, int stream_index, int64_t sample_time, int flags)
378 {
379  AVStream *st = s->streams[0]; // video stream
380  R3DContext *r3d = s->priv_data;
381  int frame_num;
382 
383  if (!st->avg_frame_rate.num)
384  return -1;
385 
386  frame_num = av_rescale_q(sample_time, st->time_base,
387  av_inv_q(st->avg_frame_rate));
388  av_log(s, AV_LOG_TRACE, "seek frame num %d timestamp %"PRId64"\n",
389  frame_num, sample_time);
390 
391  if (frame_num < r3d->video_offsets_count) {
392  if (avio_seek(s->pb, r3d->video_offsets_count, SEEK_SET) < 0)
393  return -1;
394  } else {
395  av_log(s, AV_LOG_ERROR, "could not seek to frame %d\n", frame_num);
396  return -1;
397  }
398 
399  return 0;
400 }
401 
403  .name = "r3d",
404  .long_name = NULL_IF_CONFIG_SMALL("REDCODE R3D"),
405  .priv_data_size = sizeof(R3DContext),
409  .read_seek = r3d_seek,
410 };
#define NULL
Definition: coverity.c:32
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
uint64_t offset
Definition: r3d.c:38
int64_t avio_size(AVIOContext *s)
Get the filesize.
Definition: aviobuf.c:346
uint32_t tag
Definition: r3d.c:37
unsigned video_offsets_count
Definition: r3d.c:29
static int read_atom(AVFormatContext *s, Atom *atom)
Definition: r3d.c:41
void avpriv_set_pts_info(AVStream *s, int pts_wrap_bits, unsigned int pts_num, unsigned int pts_den)
Set the time base and wrapping info for a given stream.
Definition: utils.c:4869
int64_t data_offset
offset of the first packet
Definition: internal.h:80
static int read_seek(AVFormatContext *ctx, int stream_index, int64_t timestamp, int flags)
Definition: libcdio.c:153
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
Definition: codec_par.h:60
int num
Numerator.
Definition: rational.h:59
int64_t avio_seek(AVIOContext *s, int64_t offset, int whence)
fseek() equivalent for AVIOContext.
Definition: aviobuf.c:253
unsigned size
Definition: r3d.c:36
AVFormatInternal * internal
An opaque field for libavformat internal usage.
Definition: avformat.h:1804
int64_t avio_skip(AVIOContext *s, int64_t offset)
Skip given number of bytes forward.
Definition: aviobuf.c:341
discard all
Definition: avcodec.h:236
static AVPacket pkt
unsigned int avio_rb16(AVIOContext *s)
Definition: aviobuf.c:775
int ctx_flags
Flags signalling stream properties.
Definition: avformat.h:1400
int framerate
Definition: h264_levels.c:65
Format I/O context.
Definition: avformat.h:1351
Public dictionary API.
int width
Video only.
Definition: codec_par.h:126
#define AVFMTCTX_NOHEADER
signal that no header is present (streams are added dynamically)
Definition: avformat.h:1295
static int r3d_probe(const AVProbeData *p)
Definition: r3d.c:370
#define AV_LOG_TRACE
Extremely verbose debugging, useful for libav* development.
Definition: log.h:220
unsigned int avio_rb32(AVIOContext *s)
Definition: aviobuf.c:790
int64_t duration
Duration of this packet in AVStream->time_base units, 0 if unknown.
Definition: packet.h:381
AVStream * avformat_new_stream(AVFormatContext *s, const AVCodec *c)
Add a new stream to a media file.
Definition: utils.c:4450
AVStream ** streams
A list of all streams in the file.
Definition: avformat.h:1419
static int r3d_read_reda(AVFormatContext *s, AVPacket *pkt, Atom *atom)
Definition: r3d.c:272
#define AVERROR_EOF
End of file.
Definition: error.h:55
int av_get_packet(AVIOContext *s, AVPacket *pkt, int size)
Allocate and read the payload of a packet and initialize its fields with default values.
Definition: utils.c:305
ptrdiff_t size
Definition: opengl_enc.c:100
static av_always_inline int64_t avio_tell(AVIOContext *s)
ftell() equivalent for AVIOContext.
Definition: avio.h:557
#define av_log(a,...)
int avio_read(AVIOContext *s, unsigned char *buf, int size)
Read size bytes from AVIOContext into buf.
Definition: aviobuf.c:637
int64_t av_rescale_q(int64_t a, AVRational bq, AVRational cq)
Rescale a 64-bit integer by 2 rational numbers.
Definition: mathematics.c:142
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:194
unsigned int avio_rl32(AVIOContext *s)
Definition: aviobuf.c:759
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:153
unsigned int pos
Definition: spdifenc.c:410
static void r3d_read_reos(AVFormatContext *s)
Definition: r3d.c:142
enum AVMediaType codec_type
General type of the encoded data.
Definition: codec_par.h:56
Definition: r3d.c:35
int audio_channels
Definition: r3d.c:32
AVRational avg_frame_rate
Average framerate.
Definition: avformat.h:949
Definition: r3d.c:28
unsigned rdvo_offset
Definition: r3d.c:30
int avio_r8(AVIOContext *s)
Definition: aviobuf.c:628
unsigned char * buf
Buffer must have AVPROBE_PADDING_SIZE of extra allocated bytes filled with zero.
Definition: avformat.h:443
unsigned int nb_streams
Number of elements in AVFormatContext.streams.
Definition: avformat.h:1407
int seekable
A combination of AVIO_SEEKABLE_ flags or 0 when the stream is not seekable.
Definition: avio.h:260
AVInputFormat ff_r3d_demuxer
Definition: r3d.c:402
int64_t av_rescale(int64_t a, int64_t b, int64_t c)
Rescale a 64-bit integer with rounding to nearest.
Definition: mathematics.c:129
#define s(width, name)
Definition: cbs_vp9.c:257
AVDictionary * metadata
Definition: avformat.h:940
static int read_header(FFV1Context *f)
Definition: ffv1dec.c:527
Stream structure.
Definition: avformat.h:876
static int read_packet(void *opaque, uint8_t *buf, int buf_size)
Definition: avio_reading.c:42
#define AVIO_SEEKABLE_NORMAL
Seeking works like for a local file.
Definition: avio.h:40
AVIOContext * pb
I/O context.
Definition: avformat.h:1393
int av_dict_set(AVDictionary **pm, const char *key, const char *value, int flags)
Set the given entry in *pm, overwriting an existing entry.
Definition: dict.c:70
Rational number (pair of numerator and denominator).
Definition: rational.h:58
static int r3d_read_rdvo(AVFormatContext *s, Atom *atom)
Definition: r3d.c:116
This structure contains the data a format has to probe a file.
Definition: avformat.h:441
#define flags(name, subs,...)
Definition: cbs_av1.c:560
static int read_probe(const AVProbeData *pd)
Definition: jvdec.c:55
static int r3d_seek(AVFormatContext *s, int stream_index, int64_t sample_time, int flags)
Definition: r3d.c:377
int64_t duration
Decoding: duration of the stream, in stream time base.
Definition: avformat.h:925
static av_always_inline AVRational av_inv_q(AVRational q)
Invert a rational.
Definition: rational.h:159
int sample_rate
Audio only.
Definition: codec_par.h:170
#define AVPROBE_SCORE_MAX
maximum score
Definition: avformat.h:453
Main libavformat public API header.
static int r3d_read_header(AVFormatContext *s)
Definition: r3d.c:161
static int r3d_read_packet(AVFormatContext *s, AVPacket *pkt)
Definition: r3d.c:336
int den
Denominator.
Definition: rational.h:60
void * priv_data
Format private data.
Definition: avformat.h:1379
static int r3d_read_redv(AVFormatContext *s, AVPacket *pkt, Atom *atom)
Definition: r3d.c:217
int channels
Audio only.
Definition: codec_par.h:166
int64_t dts
Decompression timestamp in AVStream->time_base units; the time at which the packet is decompressed...
Definition: packet.h:362
FILE * out
Definition: movenc.c:54
static int r3d_read_red1(AVFormatContext *s)
Definition: r3d.c:53
Filter the word “frame” indicates either a video frame or a group of audio samples
const char * name
A comma separated list of short names for the format.
Definition: avformat.h:650
AVCodecParameters * codecpar
Codec parameters associated with this stream.
Definition: avformat.h:1023
int stream_index
Definition: packet.h:365
AVRational time_base
This is the fundamental unit of time (in seconds) in terms of which frame timestamps are represented...
Definition: avformat.h:905
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
#define MKTAG(a, b, c, d)
Definition: common.h:406
enum AVDiscard discard
Selects which packets can be discarded at will and do not need to be demuxed.
Definition: avformat.h:931
AVRational r_frame_rate
Real base framerate of the stream.
Definition: avformat.h:1000
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_RL32
Definition: bytestream.h:87
This structure stores compressed data.
Definition: packet.h:340
int i
Definition: input.c:407
#define av_unused
Definition: attributes.h:131
static uint8_t tmp[11]
Definition: aes_ctr.c:26