FFmpeg  4.3.8
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 av_unused tmp2;
61 
62  if (!st)
63  return AVERROR(ENOMEM);
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
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)
133  st->time_base);
134  av_log(s, AV_LOG_TRACE, "duration %"PRId64"\n", st->duration);
135 
136  return 0;
137 }
138 
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 
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)
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 
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*
264  av_log(s, AV_LOG_TRACE, "pkt dts %"PRId64" duration %"PRId64"\n", pkt->dts, pkt->duration);
265 
266  return 0;
267 }
268 
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);
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 
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 
401  .name = "r3d",
402  .long_name = NULL_IF_CONFIG_SMALL("REDCODE R3D"),
403  .priv_data_size = sizeof(R3DContext),
407  .read_seek = r3d_seek,
408 };
#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:334
int size
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:4948
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:241
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:329
discard all
Definition: avcodec.h:236
static AVPacket pkt
unsigned int avio_rb16(AVIOContext *s)
Definition: aviobuf.c:763
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:368
#define AV_LOG_TRACE
Extremely verbose debugging, useful for libav* development.
Definition: log.h:202
unsigned int avio_rb32(AVIOContext *s)
Definition: aviobuf.c:778
int64_t duration
Duration of this packet in AVStream->time_base units, 0 if unknown.
Definition: packet.h:373
AVStream * avformat_new_stream(AVFormatContext *s, const AVCodec *c)
Add a new stream to a media file.
Definition: utils.c:4526
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:269
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
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:625
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 i(width, name, range_min, range_max)
Definition: cbs_h2645.c:269
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
unsigned int avio_rl32(AVIOContext *s)
Definition: aviobuf.c:747
#define AVERROR(e)
Definition: error.h:43
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:188
unsigned int pos
Definition: spdifenc.c:412
static void r3d_read_reos(AVFormatContext *s)
Definition: r3d.c:139
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:616
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:400
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
#define AV_RL32
Definition: intreadwrite.h:146
AVDictionary * metadata
Definition: avformat.h:940
static int read_header(FFV1Context *f)
Definition: ffv1dec.c:545
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
long long int64_t
Definition: coverity.c:34
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:113
This structure contains the data a format has to probe a file.
Definition: avformat.h:441
#define flags(name, subs,...)
Definition: cbs_av1.c:576
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:375
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:158
static int r3d_read_packet(AVFormatContext *s, AVPacket *pkt)
Definition: r3d.c:334
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:214
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:354
FILE * out
Definition: movenc.c:54
static int r3d_read_red1(AVFormatContext *s)
Definition: r3d.c:53
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:357
AVRational time_base
This is the fundamental unit of time (in seconds) in terms of which frame timestamps are represented...
Definition: avformat.h:905
#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
This structure stores compressed data.
Definition: packet.h:332
#define av_unused
Definition: attributes.h:131
static uint8_t tmp[11]
Definition: aes_ctr.c:26