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 {
29  unsigned video_offsets_count;
30  unsigned rdvo_offset;
31 
32  int audio_channels;
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 
53 static int r3d_read_red1(AVFormatContext *s)
54 {
55  AVStream *st = avformat_new_stream(s, NULL);
56  R3DContext *r3d = s->priv_data;
57  char filename[258];
58  int tmp;
59  int av_unused tmp2;
60  AVRational framerate;
61 
62  if (!st)
63  return AVERROR(ENOMEM);
64  st->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
65  st->codecpar->codec_id = AV_CODEC_ID_JPEG2000;
66 
67  tmp = avio_r8(s->pb); // major version
68  tmp2 = avio_r8(s->pb); // minor version
69  av_log(s, AV_LOG_TRACE, "version %d.%d\n", tmp, tmp2);
70 
71  tmp = avio_rb16(s->pb); // unknown
72  av_log(s, AV_LOG_TRACE, "unknown1 %d\n", tmp);
73 
74  tmp = avio_rb32(s->pb);
75  avpriv_set_pts_info(st, 32, 1, tmp);
76 
77  tmp = avio_rb32(s->pb); // filenum
78  av_log(s, AV_LOG_TRACE, "filenum %d\n", tmp);
79 
80  avio_skip(s->pb, 32); // unknown
81 
82  st->codecpar->width = avio_rb32(s->pb);
83  st->codecpar->height = avio_rb32(s->pb);
84 
85  tmp = avio_rb16(s->pb); // unknown
86  av_log(s, AV_LOG_TRACE, "unknown2 %d\n", tmp);
87 
88  framerate.num = avio_rb16(s->pb);
89  framerate.den = avio_rb16(s->pb);
90  if (framerate.num > 0 && framerate.den > 0) {
91 #if FF_API_R_FRAME_RATE
92  st->r_frame_rate =
93 #endif
94  st->avg_frame_rate = framerate;
95  }
96 
97  r3d->audio_channels = avio_r8(s->pb); // audio channels
98  av_log(s, AV_LOG_TRACE, "audio channels %d\n", tmp);
99 
100  avio_read(s->pb, filename, 257);
101  filename[sizeof(filename)-1] = 0;
102  av_dict_set(&st->metadata, "filename", filename, 0);
103 
104  av_log(s, AV_LOG_TRACE, "filename %s\n", filename);
105  av_log(s, AV_LOG_TRACE, "resolution %dx%d\n", st->codecpar->width, st->codecpar->height);
106  av_log(s, AV_LOG_TRACE, "timescale %d\n", st->time_base.den);
107  av_log(s, AV_LOG_TRACE, "frame rate %d/%d\n",
108  framerate.num, framerate.den);
109 
110  return 0;
111 }
112 
113 static int r3d_read_rdvo(AVFormatContext *s, Atom *atom)
114 {
115  R3DContext *r3d = s->priv_data;
116  AVStream *st = s->streams[0];
117  int i;
118 
119  r3d->video_offsets_count = (atom->size - 8) / 4;
120 
121  for (i = 0; i < r3d->video_offsets_count; i++) {
122  unsigned video_offset = avio_rb32(s->pb);
123  if (!video_offset) {
124  r3d->video_offsets_count = i;
125  break;
126  }
127  av_log(s, AV_LOG_TRACE, "video offset %d: %#x\n", i, video_offset);
128  }
129 
130  if (st->avg_frame_rate.num)
131  st->duration = av_rescale_q(r3d->video_offsets_count,
132  av_inv_q(st->avg_frame_rate),
133  st->time_base);
134  av_log(s, AV_LOG_TRACE, "duration %"PRId64"\n", st->duration);
135 
136  return 0;
137 }
138 
139 static void r3d_read_reos(AVFormatContext *s)
140 {
141  R3DContext *r3d = s->priv_data;
142  int av_unused tmp;
143 
144  r3d->rdvo_offset = avio_rb32(s->pb);
145  avio_rb32(s->pb); // rdvs offset
146  avio_rb32(s->pb); // rdao offset
147  avio_rb32(s->pb); // rdas offset
148 
149  tmp = avio_rb32(s->pb);
150  av_log(s, AV_LOG_TRACE, "num video chunks %d\n", tmp);
151 
152  tmp = avio_rb32(s->pb);
153  av_log(s, AV_LOG_TRACE, "num audio chunks %d\n", tmp);
154 
155  avio_skip(s->pb, 6*4);
156 }
157 
158 static int r3d_read_header(AVFormatContext *s)
159 {
160  R3DContext *r3d = s->priv_data;
161  Atom atom;
162  int ret;
163 
164  if (read_atom(s, &atom) < 0) {
165  av_log(s, AV_LOG_ERROR, "error reading atom\n");
166  return -1;
167  }
168  if (atom.tag == MKTAG('R','E','D','1')) {
169  if ((ret = r3d_read_red1(s)) < 0) {
170  av_log(s, AV_LOG_ERROR, "error parsing 'red1' atom\n");
171  return ret;
172  }
173  } else {
174  av_log(s, AV_LOG_ERROR, "could not find 'red1' atom\n");
175  return -1;
176  }
177 
178  /* we cannot create the audio stream now because we do not know the
179  * sample rate */
180  if (r3d->audio_channels)
181  s->ctx_flags |= AVFMTCTX_NOHEADER;
182 
183  s->internal->data_offset = avio_tell(s->pb);
184  av_log(s, AV_LOG_TRACE, "data offset %#"PRIx64"\n", s->internal->data_offset);
185  if (!(s->pb->seekable & AVIO_SEEKABLE_NORMAL))
186  return 0;
187  // find REOB/REOF/REOS to load index
188  avio_seek(s->pb, avio_size(s->pb)-48-8, SEEK_SET);
189  if (read_atom(s, &atom) < 0)
190  av_log(s, AV_LOG_ERROR, "error reading end atom\n");
191 
192  if (atom.tag != MKTAG('R','E','O','B') &&
193  atom.tag != MKTAG('R','E','O','F') &&
194  atom.tag != MKTAG('R','E','O','S'))
195  goto out;
196 
197  r3d_read_reos(s);
198 
199  if (r3d->rdvo_offset) {
200  avio_seek(s->pb, r3d->rdvo_offset, SEEK_SET);
201  if (read_atom(s, &atom) < 0)
202  av_log(s, AV_LOG_ERROR, "error reading 'rdvo' atom\n");
203  if (atom.tag == MKTAG('R','D','V','O')) {
204  if (r3d_read_rdvo(s, &atom) < 0)
205  av_log(s, AV_LOG_ERROR, "error parsing 'rdvo' atom\n");
206  }
207  }
208 
209  out:
210  avio_seek(s->pb, s->internal->data_offset, SEEK_SET);
211  return 0;
212 }
213 
214 static int r3d_read_redv(AVFormatContext *s, AVPacket *pkt, Atom *atom)
215 {
216  AVStream *st = s->streams[0];
217  int tmp;
218  int av_unused tmp2;
219  int64_t pos = avio_tell(s->pb);
220  unsigned dts;
221  int ret;
222 
223  dts = avio_rb32(s->pb);
224 
225  tmp = avio_rb32(s->pb);
226  av_log(s, AV_LOG_TRACE, "frame num %d\n", tmp);
227 
228  tmp = avio_r8(s->pb); // major version
229  tmp2 = avio_r8(s->pb); // minor version
230  av_log(s, AV_LOG_TRACE, "version %d.%d\n", tmp, tmp2);
231 
232  tmp = avio_rb16(s->pb); // unknown
233  av_log(s, AV_LOG_TRACE, "unknown %d\n", tmp);
234 
235  if (tmp > 4) {
236  tmp = avio_rb16(s->pb); // unknown
237  av_log(s, AV_LOG_TRACE, "unknown %d\n", tmp);
238 
239  tmp = avio_rb16(s->pb); // unknown
240  av_log(s, AV_LOG_TRACE, "unknown %d\n", tmp);
241 
242  tmp = avio_rb32(s->pb);
243  av_log(s, AV_LOG_TRACE, "width %d\n", tmp);
244  tmp = avio_rb32(s->pb);
245  av_log(s, AV_LOG_TRACE, "height %d\n", tmp);
246 
247  tmp = avio_rb32(s->pb);
248  av_log(s, AV_LOG_TRACE, "metadata len %d\n", tmp);
249  }
250  tmp = atom->size - 8 - (avio_tell(s->pb) - pos);
251  if (tmp < 0)
252  return -1;
253  ret = av_get_packet(s->pb, pkt, tmp);
254  if (ret < 0) {
255  av_log(s, AV_LOG_ERROR, "error reading video packet\n");
256  return -1;
257  }
258 
259  pkt->stream_index = 0;
260  pkt->dts = dts;
261  if (st->avg_frame_rate.num)
262  pkt->duration = (uint64_t)st->time_base.den*
263  st->avg_frame_rate.den/st->avg_frame_rate.num;
264  av_log(s, AV_LOG_TRACE, "pkt dts %"PRId64" duration %"PRId64"\n", pkt->dts, pkt->duration);
265 
266  return 0;
267 }
268 
269 static int r3d_read_reda(AVFormatContext *s, AVPacket *pkt, Atom *atom)
270 {
271  R3DContext *r3d = s->priv_data;
272  AVStream *st;
273  int av_unused tmp, tmp2;
274  int samples, size;
275  int64_t pos = avio_tell(s->pb);
276  unsigned dts;
277  int ret;
278 
279  if (s->nb_streams < 2) {
280  st = avformat_new_stream(s, NULL);
281  if (!st)
282  return AVERROR(ENOMEM);
283  st->codecpar->codec_type = AVMEDIA_TYPE_AUDIO;
284  st->codecpar->codec_id = AV_CODEC_ID_PCM_S32BE;
285  st->codecpar->channels = r3d->audio_channels;
286  avpriv_set_pts_info(st, 32, 1, s->streams[0]->time_base.den);
287  } else {
288  st = s->streams[1];
289  }
290 
291  dts = avio_rb32(s->pb);
292 
293  st->codecpar->sample_rate = avio_rb32(s->pb);
294  if (st->codecpar->sample_rate <= 0) {
295  av_log(s, AV_LOG_ERROR, "Bad sample rate\n");
296  return AVERROR_INVALIDDATA;
297  }
298 
299  samples = avio_rb32(s->pb);
300 
301  tmp = avio_rb32(s->pb);
302  av_log(s, AV_LOG_TRACE, "packet num %d\n", tmp);
303 
304  tmp = avio_rb16(s->pb); // unknown
305  av_log(s, AV_LOG_TRACE, "unknown %d\n", tmp);
306 
307  tmp = avio_r8(s->pb); // major version
308  tmp2 = avio_r8(s->pb); // minor version
309  av_log(s, AV_LOG_TRACE, "version %d.%d\n", tmp, tmp2);
310 
311  tmp = avio_rb32(s->pb); // unknown
312  av_log(s, AV_LOG_TRACE, "unknown %d\n", tmp);
313 
314  size = atom->size - 8 - (avio_tell(s->pb) - pos);
315  if (size < 0)
316  return -1;
317  ret = av_get_packet(s->pb, pkt, size);
318  if (ret < 0) {
319  av_log(s, AV_LOG_ERROR, "error reading audio packet\n");
320  return ret;
321  }
322 
323  pkt->stream_index = 1;
324  pkt->dts = dts;
325 
326  if (st->codecpar->sample_rate && samples > 0)
327  pkt->duration = av_rescale(samples, st->time_base.den, st->codecpar->sample_rate);
328  av_log(s, AV_LOG_TRACE, "pkt dts %"PRId64" duration %"PRId64" samples %d sample rate %d\n",
329  pkt->dts, pkt->duration, samples, st->codecpar->sample_rate);
330 
331  return 0;
332 }
333 
334 static int r3d_read_packet(AVFormatContext *s, AVPacket *pkt)
335 {
336  R3DContext *r3d = s->priv_data;
337  Atom atom;
338  int err = 0;
339 
340  while (!err) {
341  if (read_atom(s, &atom) < 0) {
342  err = -1;
343  break;
344  }
345  switch (atom.tag) {
346  case MKTAG('R','E','D','V'):
347  if (s->streams[0]->discard == AVDISCARD_ALL)
348  goto skip;
349  if (!(err = r3d_read_redv(s, pkt, &atom)))
350  return 0;
351  break;
352  case MKTAG('R','E','D','A'):
353  if (!r3d->audio_channels)
354  return -1;
355  if (s->nb_streams >= 2 && s->streams[1]->discard == AVDISCARD_ALL)
356  goto skip;
357  if (!(err = r3d_read_reda(s, pkt, &atom)))
358  return 0;
359  break;
360  default:
361  skip:
362  avio_skip(s->pb, atom.size-8);
363  }
364  }
365  return err;
366 }
367 
368 static int r3d_probe(const AVProbeData *p)
369 {
370  if (AV_RL32(p->buf + 4) == MKTAG('R','E','D','1'))
371  return AVPROBE_SCORE_MAX;
372  return 0;
373 }
374 
375 static int r3d_seek(AVFormatContext *s, int stream_index, int64_t sample_time, int flags)
376 {
377  AVStream *st = s->streams[0]; // video stream
378  R3DContext *r3d = s->priv_data;
379  int frame_num;
380 
381  if (!st->avg_frame_rate.num)
382  return -1;
383 
384  frame_num = av_rescale_q(sample_time, st->time_base,
385  av_inv_q(st->avg_frame_rate));
386  av_log(s, AV_LOG_TRACE, "seek frame num %d timestamp %"PRId64"\n",
387  frame_num, sample_time);
388 
389  if (frame_num < r3d->video_offsets_count) {
390  if (avio_seek(s->pb, r3d->video_offsets_count, SEEK_SET) < 0)
391  return -1;
392  } else {
393  av_log(s, AV_LOG_ERROR, "could not seek to frame %d\n", frame_num);
394  return -1;
395  }
396 
397  return 0;
398 }
399 
400 AVInputFormat ff_r3d_demuxer = {
401  .name = "r3d",
402  .long_name = NULL_IF_CONFIG_SMALL("REDCODE R3D"),
403  .priv_data_size = sizeof(R3DContext),
404  .read_probe = r3d_probe,
405  .read_header = r3d_read_header,
406  .read_packet = r3d_read_packet,
407  .read_seek = r3d_seek,
408 };
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
avformat_new_stream
AVStream * avformat_new_stream(AVFormatContext *s, const AVCodec *c)
Add a new stream to a media file.
Definition: utils.c:4526
AVCodecParameters::codec_type
enum AVMediaType codec_type
General type of the encoded data.
Definition: codec_par.h:56
out
FILE * out
Definition: movenc.c:54
MKTAG
#define MKTAG(a, b, c, d)
Definition: common.h:406
r3d_read_red1
static int r3d_read_red1(AVFormatContext *s)
Definition: r3d.c:53
Atom::tag
uint32_t tag
Definition: r3d.c:37
av_unused
#define av_unused
Definition: attributes.h:131
tmp
static uint8_t tmp[11]
Definition: aes_ctr.c:26
r3d_seek
static int r3d_seek(AVFormatContext *s, int stream_index, int64_t sample_time, int flags)
Definition: r3d.c:375
AVStream::avg_frame_rate
AVRational avg_frame_rate
Average framerate.
Definition: avformat.h:938
AVPacket::duration
int64_t duration
Duration of this packet in AVStream->time_base units, 0 if unknown.
Definition: packet.h:373
mathematics.h
avio_size
int64_t avio_size(AVIOContext *s)
Get the filesize.
Definition: aviobuf.c:334
Atom::offset
uint64_t offset
Definition: r3d.c:38
AVPROBE_SCORE_MAX
#define AVPROBE_SCORE_MAX
maximum score
Definition: avformat.h:453
framerate
int framerate
Definition: h264_levels.c:65
AVCodecParameters::channels
int channels
Audio only.
Definition: codec_par.h:166
r3d_read_reda
static int r3d_read_reda(AVFormatContext *s, AVPacket *pkt, Atom *atom)
Definition: r3d.c:269
read_seek
static int read_seek(AVFormatContext *ctx, int stream_index, int64_t timestamp, int flags)
Definition: libcdio.c:153
avio_tell
static av_always_inline int64_t avio_tell(AVIOContext *s)
ftell() equivalent for AVIOContext.
Definition: avio.h:557
Atom
Definition: r3d.c:35
AVStream::duration
int64_t duration
Decoding: duration of the stream, in stream time base.
Definition: avformat.h:914
AVRational::num
int num
Numerator.
Definition: rational.h:59
avio_rb32
unsigned int avio_rb32(AVIOContext *s)
Definition: aviobuf.c:778
AV_LOG_TRACE
#define AV_LOG_TRACE
Extremely verbose debugging, useful for libav* development.
Definition: log.h:202
AV_LOG_ERROR
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
AVInputFormat
Definition: avformat.h:636
intreadwrite.h
s
#define s(width, name)
Definition: cbs_vp9.c:257
r3d_read_reos
static void r3d_read_reos(AVFormatContext *s)
Definition: r3d.c:139
AVInputFormat::name
const char * name
A comma separated list of short names for the format.
Definition: avformat.h:641
AVProbeData::buf
unsigned char * buf
Buffer must have AVPROBE_PADDING_SIZE of extra allocated bytes filled with zero.
Definition: avformat.h:443
AVMEDIA_TYPE_AUDIO
@ AVMEDIA_TYPE_AUDIO
Definition: avutil.h:202
AVCodecParameters::width
int width
Video only.
Definition: codec_par.h:126
read_atom
static int read_atom(AVFormatContext *s, Atom *atom)
Definition: r3d.c:41
av_rescale_q
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
r3d_probe
static int r3d_probe(const AVProbeData *p)
Definition: r3d.c:368
AVDISCARD_ALL
@ AVDISCARD_ALL
discard all
Definition: avcodec.h:236
AVFormatContext
Format I/O context.
Definition: avformat.h:1335
internal.h
AVStream::codecpar
AVCodecParameters * codecpar
Codec parameters associated with this stream.
Definition: avformat.h:1012
read_header
static int read_header(FFV1Context *f)
Definition: ffv1dec.c:527
AVStream::time_base
AVRational time_base
This is the fundamental unit of time (in seconds) in terms of which frame timestamps are represented.
Definition: avformat.h:894
NULL
#define NULL
Definition: coverity.c:32
R3DContext
Definition: r3d.c:28
read_probe
static int read_probe(const AVProbeData *pd)
Definition: jvdec.c:55
AVFMTCTX_NOHEADER
#define AVFMTCTX_NOHEADER
signal that no header is present (streams are added dynamically)
Definition: avformat.h:1284
AVRational
Rational number (pair of numerator and denominator).
Definition: rational.h:58
AVProbeData
This structure contains the data a format has to probe a file.
Definition: avformat.h:441
AVStream::metadata
AVDictionary * metadata
Definition: avformat.h:929
AVCodecParameters::sample_rate
int sample_rate
Audio only.
Definition: codec_par.h:170
R3DContext::video_offsets_count
unsigned video_offsets_count
Definition: r3d.c:29
avio_rl32
unsigned int avio_rl32(AVIOContext *s)
Definition: aviobuf.c:747
ff_r3d_demuxer
AVInputFormat ff_r3d_demuxer
Definition: r3d.c:400
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:188
avpriv_set_pts_info
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:4948
size
int size
Definition: twinvq_data.h:11134
r3d_read_packet
static int r3d_read_packet(AVFormatContext *s, AVPacket *pkt)
Definition: r3d.c:334
AVPacket::dts
int64_t dts
Decompression timestamp in AVStream->time_base units; the time at which the packet is decompressed.
Definition: packet.h:354
avio_r8
int avio_r8(AVIOContext *s)
Definition: aviobuf.c:616
r3d_read_header
static int r3d_read_header(AVFormatContext *s)
Definition: r3d.c:158
r3d_read_redv
static int r3d_read_redv(AVFormatContext *s, AVPacket *pkt, Atom *atom)
Definition: r3d.c:214
i
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:269
AVCodecParameters::height
int height
Definition: codec_par.h:127
AV_CODEC_ID_PCM_S32BE
@ AV_CODEC_ID_PCM_S32BE
Definition: codec_id.h:310
av_inv_q
static av_always_inline AVRational av_inv_q(AVRational q)
Invert a rational.
Definition: rational.h:159
AV_CODEC_ID_JPEG2000
@ AV_CODEC_ID_JPEG2000
Definition: codec_id.h:137
av_rescale
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
av_get_packet
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:307
ret
ret
Definition: filter_design.txt:187
read_packet
static int read_packet(void *opaque, uint8_t *buf, int buf_size)
Definition: avio_reading.c:42
AVStream
Stream structure.
Definition: avformat.h:865
avio_seek
int64_t avio_seek(AVIOContext *s, int64_t offset, int whence)
fseek() equivalent for AVIOContext.
Definition: aviobuf.c:241
avio_rb16
unsigned int avio_rb16(AVIOContext *s)
Definition: aviobuf.c:763
pos
unsigned int pos
Definition: spdifenc.c:412
avformat.h
dict.h
AV_RL32
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_RL32
Definition: bytestream.h:88
R3DContext::audio_channels
int audio_channels
Definition: r3d.c:32
pkt
static AVPacket pkt
Definition: demuxing_decoding.c:54
AVIO_SEEKABLE_NORMAL
#define AVIO_SEEKABLE_NORMAL
Seeking works like for a local file.
Definition: avio.h:40
AVRational::den
int den
Denominator.
Definition: rational.h:60
avio_read
int avio_read(AVIOContext *s, unsigned char *buf, int size)
Read size bytes from AVIOContext into buf.
Definition: aviobuf.c:625
AVStream::r_frame_rate
AVRational r_frame_rate
Real base framerate of the stream.
Definition: avformat.h:989
samples
Filter the word “frame” indicates either a video frame or a group of audio samples
Definition: filter_design.txt:8
AVPacket::stream_index
int stream_index
Definition: packet.h:357
avio_skip
int64_t avio_skip(AVIOContext *s, int64_t offset)
Skip given number of bytes forward.
Definition: aviobuf.c:329
r3d_read_rdvo
static int r3d_read_rdvo(AVFormatContext *s, Atom *atom)
Definition: r3d.c:113
AVMEDIA_TYPE_VIDEO
@ AVMEDIA_TYPE_VIDEO
Definition: avutil.h:201
AVCodecParameters::codec_id
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
Definition: codec_par.h:60
AVPacket
This structure stores compressed data.
Definition: packet.h:332
av_dict_set
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
flags
#define flags(name, subs,...)
Definition: cbs_av1.c:565
av_log
#define av_log(a,...)
Definition: tableprint_vlc.h:28
AVERROR_INVALIDDATA
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
R3DContext::rdvo_offset
unsigned rdvo_offset
Definition: r3d.c:30
Atom::size
unsigned size
Definition: r3d.c:36
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