FFmpeg  4.4
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)
184  s->ctx_flags |= AVFMTCTX_NOHEADER;
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 
329  if (st->codecpar->sample_rate && samples > 0)
330  pkt->duration = av_rescale(samples, st->time_base.den, st->codecpar->sample_rate);
331  av_log(s, AV_LOG_TRACE, "pkt dts %"PRId64" duration %"PRId64" samples %d sample rate %d\n",
332  pkt->dts, pkt->duration, samples, st->codecpar->sample_rate);
333 
334  return 0;
335 }
336 
338 {
339  R3DContext *r3d = s->priv_data;
340  Atom atom;
341  int err = 0;
342 
343  while (!err) {
344  if (read_atom(s, &atom) < 0) {
345  err = -1;
346  break;
347  }
348  switch (atom.tag) {
349  case MKTAG('R','E','D','V'):
350  if (s->streams[0]->discard == AVDISCARD_ALL)
351  goto skip;
352  if (!(err = r3d_read_redv(s, pkt, &atom)))
353  return 0;
354  break;
355  case MKTAG('R','E','D','A'):
356  if (!r3d->audio_channels)
357  return -1;
358  if (s->nb_streams >= 2 && s->streams[1]->discard == AVDISCARD_ALL)
359  goto skip;
360  if (!(err = r3d_read_reda(s, pkt, &atom)))
361  return 0;
362  break;
363  default:
364  skip:
365  avio_skip(s->pb, atom.size-8);
366  }
367  }
368  return err;
369 }
370 
371 static int r3d_probe(const AVProbeData *p)
372 {
373  if (AV_RL32(p->buf + 4) == MKTAG('R','E','D','1'))
374  return AVPROBE_SCORE_MAX;
375  return 0;
376 }
377 
378 static int r3d_seek(AVFormatContext *s, int stream_index, int64_t sample_time, int flags)
379 {
380  AVStream *st = s->streams[0]; // video stream
381  R3DContext *r3d = s->priv_data;
382  int frame_num;
383 
384  if (!st->avg_frame_rate.num)
385  return -1;
386 
387  frame_num = av_rescale_q(sample_time, st->time_base,
388  av_inv_q(st->avg_frame_rate));
389  av_log(s, AV_LOG_TRACE, "seek frame num %d timestamp %"PRId64"\n",
390  frame_num, sample_time);
391 
392  if (frame_num < r3d->video_offsets_count) {
393  if (avio_seek(s->pb, r3d->video_offsets_count, SEEK_SET) < 0)
394  return -1;
395  } else {
396  av_log(s, AV_LOG_ERROR, "could not seek to frame %d\n", frame_num);
397  return -1;
398  }
399 
400  return 0;
401 }
402 
404  .name = "r3d",
405  .long_name = NULL_IF_CONFIG_SMALL("REDCODE R3D"),
406  .priv_data_size = sizeof(R3DContext),
410  .read_seek = r3d_seek,
411 };
#define av_unused
Definition: attributes.h:131
Main libavformat public API header.
#define AVPROBE_SCORE_MAX
maximum score
Definition: avformat.h:453
#define AVFMTCTX_NOHEADER
signal that no header is present (streams are added dynamically)
Definition: avformat.h:1177
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:310
int64_t avio_seek(AVIOContext *s, int64_t offset, int whence)
fseek() equivalent for AVIOContext.
Definition: aviobuf.c:253
#define AVIO_SEEKABLE_NORMAL
Seeking works like for a local file.
Definition: avio.h:40
int64_t avio_size(AVIOContext *s)
Get the filesize.
Definition: aviobuf.c:342
unsigned int avio_rb16(AVIOContext *s)
Definition: aviobuf.c:766
static av_always_inline int64_t avio_tell(AVIOContext *s)
ftell() equivalent for AVIOContext.
Definition: avio.h:557
int64_t avio_skip(AVIOContext *s, int64_t offset)
Skip given number of bytes forward.
Definition: aviobuf.c:337
int avio_read(AVIOContext *s, unsigned char *buf, int size)
Read size bytes from AVIOContext into buf.
Definition: aviobuf.c:633
unsigned int avio_rl32(AVIOContext *s)
Definition: aviobuf.c:750
unsigned int avio_rb32(AVIOContext *s)
Definition: aviobuf.c:781
int avio_r8(AVIOContext *s)
Definition: aviobuf.c:624
static int read_packet(void *opaque, uint8_t *buf, int buf_size)
Definition: avio_reading.c:42
#define AV_RL32
Definition: intreadwrite.h:146
#define flags(name, subs,...)
Definition: cbs_av1.c:561
#define s(width, name)
Definition: cbs_vp9.c:257
#define MKTAG(a, b, c, d)
Definition: common.h:478
#define NULL
Definition: coverity.c:32
Public dictionary API.
static int read_header(FFV1Context *f)
Definition: ffv1dec.c:527
@ AV_CODEC_ID_JPEG2000
Definition: codec_id.h:137
@ AV_CODEC_ID_PCM_S32BE
Definition: codec_id.h:322
@ AVDISCARD_ALL
discard all
Definition: avcodec.h:236
AVStream * avformat_new_stream(AVFormatContext *s, const AVCodec *c)
Add a new stream to a media file.
Definition: utils.c:4505
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
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
#define AVERROR_EOF
End of file.
Definition: error.h:55
#define AVERROR(e)
Definition: error.h:43
#define AV_LOG_TRACE
Extremely verbose debugging, useful for libav* development.
Definition: log.h:220
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:194
static av_always_inline AVRational av_inv_q(AVRational q)
Invert a rational.
Definition: rational.h:159
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
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
@ AVMEDIA_TYPE_AUDIO
Definition: avutil.h:202
@ AVMEDIA_TYPE_VIDEO
Definition: avutil.h:201
int i
Definition: input.c:407
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:4941
static int read_probe(const AVProbeData *pd)
Definition: jvdec.c:55
common internal API header
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification.
Definition: internal.h:117
static int read_seek(AVFormatContext *ctx, int stream_index, int64_t timestamp, int flags)
Definition: libcdio.c:153
static int r3d_read_red1(AVFormatContext *s)
Definition: r3d.c:53
static int r3d_read_rdvo(AVFormatContext *s, Atom *atom)
Definition: r3d.c:116
static int r3d_read_redv(AVFormatContext *s, AVPacket *pkt, Atom *atom)
Definition: r3d.c:217
static int read_atom(AVFormatContext *s, Atom *atom)
Definition: r3d.c:41
AVInputFormat ff_r3d_demuxer
Definition: r3d.c:403
static int r3d_read_reda(AVFormatContext *s, AVPacket *pkt, Atom *atom)
Definition: r3d.c:272
static int r3d_seek(AVFormatContext *s, int stream_index, int64_t sample_time, int flags)
Definition: r3d.c:378
static void r3d_read_reos(AVFormatContext *s)
Definition: r3d.c:142
static int r3d_read_header(AVFormatContext *s)
Definition: r3d.c:161
static int r3d_read_packet(AVFormatContext *s, AVPacket *pkt)
Definition: r3d.c:337
static int r3d_probe(const AVProbeData *p)
Definition: r3d.c:371
unsigned int pos
Definition: spdifenc.c:412
int channels
Audio only.
Definition: codec_par.h:166
int width
Video only.
Definition: codec_par.h:126
enum AVMediaType codec_type
General type of the encoded data.
Definition: codec_par.h:56
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
Definition: codec_par.h:60
int sample_rate
Audio only.
Definition: codec_par.h:170
Format I/O context.
Definition: avformat.h:1232
const char * name
A comma separated list of short names for the format.
Definition: avformat.h:645
This structure stores compressed data.
Definition: packet.h:346
int stream_index
Definition: packet.h:371
int64_t duration
Duration of this packet in AVStream->time_base units, 0 if unknown.
Definition: packet.h:387
int64_t dts
Decompression timestamp in AVStream->time_base units; the time at which the packet is decompressed.
Definition: packet.h:368
This structure contains the data a format has to probe a file.
Definition: avformat.h:441
unsigned char * buf
Buffer must have AVPROBE_PADDING_SIZE of extra allocated bytes filled with zero.
Definition: avformat.h:443
Rational number (pair of numerator and denominator).
Definition: rational.h:58
int num
Numerator.
Definition: rational.h:59
int den
Denominator.
Definition: rational.h:60
Stream structure.
Definition: avformat.h:873
AVCodecParameters * codecpar
Codec parameters associated with this stream.
Definition: avformat.h:1038
int64_t duration
Decoding: duration of the stream, in stream time base.
Definition: avformat.h:922
AVDictionary * metadata
Definition: avformat.h:937
AVRational avg_frame_rate
Average framerate.
Definition: avformat.h:946
AVRational time_base
This is the fundamental unit of time (in seconds) in terms of which frame timestamps are represented.
Definition: avformat.h:902
AVRational r_frame_rate
Real base framerate of the stream.
Definition: avformat.h:1015
Definition: r3d.c:35
unsigned size
Definition: r3d.c:36
uint64_t offset
Definition: r3d.c:38
uint32_t tag
Definition: r3d.c:37
Definition: r3d.c:28
unsigned video_offsets_count
Definition: r3d.c:29
int audio_channels
Definition: r3d.c:32
unsigned rdvo_offset
Definition: r3d.c:30
#define av_log(a,...)
static uint8_t tmp[11]
Definition: aes_ctr.c:27
int framerate
Definition: h264_levels.c:65
FILE * out
Definition: movenc.c:54
AVPacket * pkt
Definition: movenc.c:59
int size