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 *video_offsets;
31  unsigned rdvo_offset;
32 
34 } R3DContext;
35 
36 typedef struct Atom {
37  unsigned size;
38  uint32_t tag;
39  uint64_t offset;
40 } Atom;
41 
42 static int read_atom(AVFormatContext *s, Atom *atom)
43 {
44  atom->offset = avio_tell(s->pb);
45  atom->size = avio_rb32(s->pb);
46  if (atom->size < 8)
47  return -1;
48  atom->tag = avio_rl32(s->pb);
49  av_log(s, AV_LOG_TRACE, "atom %u %.4s offset %#"PRIx64"\n",
50  atom->size, (char*)&atom->tag, atom->offset);
51  return atom->size;
52 }
53 
55 {
57  R3DContext *r3d = s->priv_data;
58  char filename[258];
59  int tmp;
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  avio_read(s->pb, filename, 257);
102  filename[sizeof(filename)-1] = 0;
103  av_dict_set(&st->metadata, "filename", filename, 0);
104 
105  av_log(s, AV_LOG_TRACE, "filename %s\n", filename);
106  av_log(s, AV_LOG_TRACE, "resolution %dx%d\n", st->codecpar->width, st->codecpar->height);
107  av_log(s, AV_LOG_TRACE, "timescale %d\n", st->time_base.den);
108  av_log(s, AV_LOG_TRACE, "frame rate %d/%d\n",
109  framerate.num, framerate.den);
110 
111  return 0;
112 }
113 
114 static int r3d_read_rdvo(AVFormatContext *s, Atom *atom)
115 {
116  R3DContext *r3d = s->priv_data;
117  AVStream *st = s->streams[0];
118  int i;
119 
120  r3d->video_offsets_count = (atom->size - 8) / 4;
121  r3d->video_offsets = av_malloc(atom->size);
122  if (!r3d->video_offsets)
123  return AVERROR(ENOMEM);
124 
125  for (i = 0; i < r3d->video_offsets_count; i++) {
126  r3d->video_offsets[i] = avio_rb32(s->pb);
127  if (!r3d->video_offsets[i]) {
128  r3d->video_offsets_count = i;
129  break;
130  }
131  av_log(s, AV_LOG_TRACE, "video offset %d: %#x\n", i, r3d->video_offsets[i]);
132  }
133 
134  if (st->avg_frame_rate.num)
137  st->time_base);
138  av_log(s, AV_LOG_TRACE, "duration %"PRId64"\n", st->duration);
139 
140  return 0;
141 }
142 
144 {
145  R3DContext *r3d = s->priv_data;
146  int av_unused tmp;
147 
148  r3d->rdvo_offset = avio_rb32(s->pb);
149  avio_rb32(s->pb); // rdvs offset
150  avio_rb32(s->pb); // rdao offset
151  avio_rb32(s->pb); // rdas offset
152 
153  tmp = avio_rb32(s->pb);
154  av_log(s, AV_LOG_TRACE, "num video chunks %d\n", tmp);
155 
156  tmp = avio_rb32(s->pb);
157  av_log(s, AV_LOG_TRACE, "num audio chunks %d\n", tmp);
158 
159  avio_skip(s->pb, 6*4);
160 }
161 
163 {
164  R3DContext *r3d = s->priv_data;
165  Atom atom;
166  int ret;
167 
168  if (read_atom(s, &atom) < 0) {
169  av_log(s, AV_LOG_ERROR, "error reading atom\n");
170  return -1;
171  }
172  if (atom.tag == MKTAG('R','E','D','1')) {
173  if ((ret = r3d_read_red1(s)) < 0) {
174  av_log(s, AV_LOG_ERROR, "error parsing 'red1' atom\n");
175  return ret;
176  }
177  } else {
178  av_log(s, AV_LOG_ERROR, "could not find 'red1' atom\n");
179  return -1;
180  }
181 
182  /* we cannot create the audio stream now because we do not know the
183  * sample rate */
184  if (r3d->audio_channels)
186 
187  s->internal->data_offset = avio_tell(s->pb);
188  av_log(s, AV_LOG_TRACE, "data offset %#"PRIx64"\n", s->internal->data_offset);
189  if (!(s->pb->seekable & AVIO_SEEKABLE_NORMAL))
190  return 0;
191  // find REOB/REOF/REOS to load index
192  avio_seek(s->pb, avio_size(s->pb)-48-8, SEEK_SET);
193  if (read_atom(s, &atom) < 0)
194  av_log(s, AV_LOG_ERROR, "error reading end atom\n");
195 
196  if (atom.tag != MKTAG('R','E','O','B') &&
197  atom.tag != MKTAG('R','E','O','F') &&
198  atom.tag != MKTAG('R','E','O','S'))
199  goto out;
200 
201  r3d_read_reos(s);
202 
203  if (r3d->rdvo_offset) {
204  avio_seek(s->pb, r3d->rdvo_offset, SEEK_SET);
205  if (read_atom(s, &atom) < 0)
206  av_log(s, AV_LOG_ERROR, "error reading 'rdvo' atom\n");
207  if (atom.tag == MKTAG('R','D','V','O')) {
208  if (r3d_read_rdvo(s, &atom) < 0)
209  av_log(s, AV_LOG_ERROR, "error parsing 'rdvo' atom\n");
210  }
211  }
212 
213  out:
214  avio_seek(s->pb, s->internal->data_offset, SEEK_SET);
215  return 0;
216 }
217 
219 {
220  AVStream *st = s->streams[0];
221  int tmp;
222  int av_unused tmp2;
223  int64_t pos = avio_tell(s->pb);
224  unsigned dts;
225  int ret;
226 
227  dts = avio_rb32(s->pb);
228 
229  tmp = avio_rb32(s->pb);
230  av_log(s, AV_LOG_TRACE, "frame num %d\n", tmp);
231 
232  tmp = avio_r8(s->pb); // major version
233  tmp2 = avio_r8(s->pb); // minor version
234  av_log(s, AV_LOG_TRACE, "version %d.%d\n", tmp, tmp2);
235 
236  tmp = avio_rb16(s->pb); // unknown
237  av_log(s, AV_LOG_TRACE, "unknown %d\n", tmp);
238 
239  if (tmp > 4) {
240  tmp = avio_rb16(s->pb); // unknown
241  av_log(s, AV_LOG_TRACE, "unknown %d\n", tmp);
242 
243  tmp = avio_rb16(s->pb); // unknown
244  av_log(s, AV_LOG_TRACE, "unknown %d\n", tmp);
245 
246  tmp = avio_rb32(s->pb);
247  av_log(s, AV_LOG_TRACE, "width %d\n", tmp);
248  tmp = avio_rb32(s->pb);
249  av_log(s, AV_LOG_TRACE, "height %d\n", tmp);
250 
251  tmp = avio_rb32(s->pb);
252  av_log(s, AV_LOG_TRACE, "metadata len %d\n", tmp);
253  }
254  tmp = atom->size - 8 - (avio_tell(s->pb) - pos);
255  if (tmp < 0)
256  return -1;
257  ret = av_get_packet(s->pb, pkt, tmp);
258  if (ret < 0) {
259  av_log(s, AV_LOG_ERROR, "error reading video packet\n");
260  return -1;
261  }
262 
263  pkt->stream_index = 0;
264  pkt->dts = dts;
265  if (st->avg_frame_rate.num)
266  pkt->duration = (uint64_t)st->time_base.den*
268  av_log(s, AV_LOG_TRACE, "pkt dts %"PRId64" duration %"PRId64"\n", pkt->dts, pkt->duration);
269 
270  return 0;
271 }
272 
274 {
275  R3DContext *r3d = s->priv_data;
276  AVStream *st;
277  int av_unused tmp, tmp2;
278  int samples, size;
279  int64_t pos = avio_tell(s->pb);
280  unsigned dts;
281  int ret;
282 
283  if (s->nb_streams < 2) {
284  st = avformat_new_stream(s, NULL);
285  if (!st)
286  return AVERROR(ENOMEM);
289  st->codecpar->channels = r3d->audio_channels;
290  avpriv_set_pts_info(st, 32, 1, s->streams[0]->time_base.den);
291  } else {
292  st = s->streams[1];
293  }
294 
295  dts = avio_rb32(s->pb);
296 
297  st->codecpar->sample_rate = avio_rb32(s->pb);
298  if (st->codecpar->sample_rate <= 0) {
299  av_log(s, AV_LOG_ERROR, "Bad sample rate\n");
300  return AVERROR_INVALIDDATA;
301  }
302 
303  samples = avio_rb32(s->pb);
304 
305  tmp = avio_rb32(s->pb);
306  av_log(s, AV_LOG_TRACE, "packet num %d\n", tmp);
307 
308  tmp = avio_rb16(s->pb); // unknown
309  av_log(s, AV_LOG_TRACE, "unknown %d\n", tmp);
310 
311  tmp = avio_r8(s->pb); // major version
312  tmp2 = avio_r8(s->pb); // minor version
313  av_log(s, AV_LOG_TRACE, "version %d.%d\n", tmp, tmp2);
314 
315  tmp = avio_rb32(s->pb); // unknown
316  av_log(s, AV_LOG_TRACE, "unknown %d\n", tmp);
317 
318  size = atom->size - 8 - (avio_tell(s->pb) - pos);
319  if (size < 0)
320  return -1;
321  ret = av_get_packet(s->pb, pkt, size);
322  if (ret < 0) {
323  av_log(s, AV_LOG_ERROR, "error reading audio packet\n");
324  return ret;
325  }
326 
327  pkt->stream_index = 1;
328  pkt->dts = dts;
329  if (st->codecpar->sample_rate)
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 {
405  R3DContext *r3d = s->priv_data;
406 
407  av_freep(&r3d->video_offsets);
408 
409  return 0;
410 }
411 
413  .name = "r3d",
414  .long_name = NULL_IF_CONFIG_SMALL("REDCODE R3D"),
415  .priv_data_size = sizeof(R3DContext),
420  .read_seek = r3d_seek,
421 };
#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:39
int64_t avio_size(AVIOContext *s)
Get the filesize.
Definition: aviobuf.c:339
uint32_t tag
Definition: r3d.c:38
unsigned video_offsets_count
Definition: r3d.c:29
static int read_atom(AVFormatContext *s, Atom *atom)
Definition: r3d.c:42
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:4929
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
static int r3d_close(AVFormatContext *s)
Definition: r3d.c:403
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
Definition: avcodec.h:3968
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:246
unsigned size
Definition: r3d.c:37
AVFormatInternal * internal
An opaque field for libavformat internal usage.
Definition: avformat.h:1811
int64_t avio_skip(AVIOContext *s, int64_t offset)
Skip given number of bytes forward.
Definition: aviobuf.c:334
discard all
Definition: avcodec.h:814
static AVPacket pkt
unsigned int avio_rb16(AVIOContext *s)
Definition: aviobuf.c:788
int ctx_flags
Flags signalling stream properties.
Definition: avformat.h:1407
int framerate
Definition: h264_levels.c:65
Format I/O context.
Definition: avformat.h:1358
Public dictionary API.
#define av_malloc(s)
int width
Video only.
Definition: avcodec.h:4034
#define AVFMTCTX_NOHEADER
signal that no header is present (streams are added dynamically)
Definition: avformat.h:1302
static int r3d_probe(const AVProbeData *p)
Definition: r3d.c:371
#define AV_LOG_TRACE
Extremely verbose debugging, useful for libav* development.
Definition: log.h:202
unsigned int avio_rb32(AVIOContext *s)
Definition: aviobuf.c:803
int64_t duration
Duration of this packet in AVStream->time_base units, 0 if unknown.
Definition: avcodec.h:1498
AVStream * avformat_new_stream(AVFormatContext *s, const AVCodec *c)
Add a new stream to a media file.
Definition: utils.c:4502
AVStream ** streams
A list of all streams in the file.
Definition: avformat.h:1426
static int r3d_read_reda(AVFormatContext *s, AVPacket *pkt, Atom *atom)
Definition: r3d.c:273
static av_cold int read_close(AVFormatContext *ctx)
Definition: libcdio.c:145
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
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:650
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:259
#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:772
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:186
static void r3d_read_reos(AVFormatContext *s)
Definition: r3d.c:143
enum AVMediaType codec_type
General type of the encoded data.
Definition: avcodec.h:3964
Definition: r3d.c:36
int audio_channels
Definition: r3d.c:33
AVRational avg_frame_rate
Average framerate.
Definition: avformat.h:954
Definition: r3d.c:28
unsigned rdvo_offset
Definition: r3d.c:31
int avio_r8(AVIOContext *s)
Definition: aviobuf.c:641
unsigned char * buf
Buffer must have AVPROBE_PADDING_SIZE of extra allocated bytes filled with zero.
Definition: avformat.h:448
unsigned int nb_streams
Number of elements in AVFormatContext.streams.
Definition: avformat.h:1414
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:412
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:945
static int read_header(FFV1Context *f)
Definition: ffv1dec.c:530
Stream structure.
Definition: avformat.h:881
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:1400
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:114
This structure contains the data a format has to probe a file.
Definition: avformat.h:446
#define flags(name, subs,...)
Definition: cbs_av1.c:561
unsigned * video_offsets
Definition: r3d.c:30
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:378
int64_t duration
Decoding: duration of the stream, in stream time base.
Definition: avformat.h:930
static av_always_inline AVRational av_inv_q(AVRational q)
Invert a rational.
Definition: rational.h:159
int sample_rate
Audio only.
Definition: avcodec.h:4078
#define AVPROBE_SCORE_MAX
maximum score
Definition: avformat.h:458
Main libavformat public API header.
static int r3d_read_header(AVFormatContext *s)
Definition: r3d.c:162
static int r3d_read_packet(AVFormatContext *s, AVPacket *pkt)
Definition: r3d.c:337
int den
Denominator.
Definition: rational.h:60
void * priv_data
Format private data.
Definition: avformat.h:1386
static int r3d_read_redv(AVFormatContext *s, AVPacket *pkt, Atom *atom)
Definition: r3d.c:218
int channels
Audio only.
Definition: avcodec.h:4074
int64_t dts
Decompression timestamp in AVStream->time_base units; the time at which the packet is decompressed...
Definition: avcodec.h:1479
FILE * out
Definition: movenc.c:54
static int r3d_read_red1(AVFormatContext *s)
Definition: r3d.c:54
Filter the word “frame” indicates either a video frame or a group of audio samples
#define av_freep(p)
const char * name
A comma separated list of short names for the format.
Definition: avformat.h:654
AVCodecParameters * codecpar
Codec parameters associated with this stream.
Definition: avformat.h:1028
int stream_index
Definition: avcodec.h:1482
AVRational time_base
This is the fundamental unit of time (in seconds) in terms of which frame timestamps are represented...
Definition: avformat.h:910
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:366
enum AVDiscard discard
Selects which packets can be discarded at will and do not need to be demuxed.
Definition: avformat.h:936
AVRational r_frame_rate
Real base framerate of the stream.
Definition: avformat.h:1005
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_RL32
Definition: bytestream.h:87
This structure stores compressed data.
Definition: avcodec.h:1457
#define av_unused
Definition: attributes.h:125
static uint8_t tmp[11]
Definition: aes_ctr.c:26