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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;
61  AVRational framerate;
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
95  st->avg_frame_rate = framerate;
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)
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(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
const char * s
Definition: avisynth_c.h:631
#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:309
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:4493
int64_t data_offset
offset of the first packet
Definition: internal.h:82
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:3939
int num
numerator
Definition: rational.h:44
int64_t avio_seek(AVIOContext *s, int64_t offset, int whence)
fseek() equivalent for AVIOContext.
Definition: aviobuf.c:230
unsigned size
Definition: r3d.c:37
AVFormatInternal * internal
An opaque field for libavformat internal usage.
Definition: avformat.h:1752
int64_t avio_skip(AVIOContext *s, int64_t offset)
Skip given number of bytes forward.
Definition: aviobuf.c:304
discard all
Definition: avcodec.h:784
static AVPacket pkt
unsigned int avio_rb16(AVIOContext *s)
Definition: aviobuf.c:736
int ctx_flags
Flags signalling stream properties.
Definition: avformat.h:1374
Format I/O context.
Definition: avformat.h:1325
Public dictionary API.
#define av_malloc(s)
int width
Video only.
Definition: avcodec.h:4005
#define AVFMTCTX_NOHEADER
signal that no header is present (streams are added dynamically)
Definition: avformat.h:1278
#define AV_LOG_TRACE
Extremely verbose debugging, useful for libav* development.
Definition: log.h:202
unsigned int avio_rb32(AVIOContext *s)
Definition: aviobuf.c:751
int64_t duration
Duration of this packet in AVStream->time_base units, 0 if unknown.
Definition: avcodec.h:1606
AVStream * avformat_new_stream(AVFormatContext *s, const AVCodec *c)
Add a new stream to a media file.
Definition: utils.c:4131
AVStream ** streams
A list of all streams in the file.
Definition: avformat.h:1393
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:260
ptrdiff_t size
Definition: opengl_enc.c:101
static av_always_inline int64_t avio_tell(AVIOContext *s)
ftell() equivalent for AVIOContext.
Definition: avio.h:511
#define av_log(a,...)
int avio_read(AVIOContext *s, unsigned char *buf, int size)
Read size bytes from AVIOContext into buf.
Definition: aviobuf.c:598
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:176
unsigned int avio_rl32(AVIOContext *s)
Definition: aviobuf.c:720
#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:176
static void r3d_read_reos(AVFormatContext *s)
Definition: r3d.c:143
enum AVMediaType codec_type
General type of the encoded data.
Definition: avcodec.h:3935
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:589
unsigned char * buf
Buffer must have AVPROBE_PADDING_SIZE of extra allocated bytes filled with zero.
Definition: avformat.h:461
unsigned int nb_streams
Number of elements in AVFormatContext.streams.
Definition: avformat.h:1381
int seekable
A combination of AVIO_SEEKABLE_ flags or 0 when the stream is not seekable.
Definition: avio.h:243
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
static int read_probe(AVProbeData *pd)
Definition: jvdec.c:55
AVDictionary * metadata
Definition: avformat.h:945
static int read_header(FFV1Context *f)
Definition: ffv1dec.c:638
Stream structure.
Definition: avformat.h:876
static int read_packet(void *opaque, uint8_t *buf, int buf_size)
Definition: avio_reading.c:42
AVIOContext * pb
I/O context.
Definition: avformat.h:1367
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:69
static int r3d_probe(AVProbeData *p)
Definition: r3d.c:371
rational number numerator/denominator
Definition: rational.h:43
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:459
static av_always_inline AVRational av_inv_q(AVRational q)
Invert a rational.
Definition: rational.h:133
unsigned * video_offsets
Definition: r3d.c:30
static int flags
Definition: cpu.c:47
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
int sample_rate
Audio only.
Definition: avcodec.h:4049
#define AVPROBE_SCORE_MAX
maximum score
Definition: avformat.h:471
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:45
static uint8_t tmp[8]
Definition: des.c:38
void * priv_data
Format private data.
Definition: avformat.h:1353
static int r3d_read_redv(AVFormatContext *s, AVPacket *pkt, Atom *atom)
Definition: r3d.c:218
int channels
Audio only.
Definition: avcodec.h:4045
int64_t dts
Decompression timestamp in AVStream->time_base units; the time at which the packet is decompressed...
Definition: avcodec.h:1587
FILE * out
Definition: movenc.c:54
static int r3d_read_red1(AVFormatContext *s)
Definition: r3d.c:54
#define av_freep(p)
const char * name
A comma separated list of short names for the format.
Definition: avformat.h:660
AVCodecParameters * codecpar
Definition: avformat.h:1228
int stream_index
Definition: avcodec.h:1590
AVRational time_base
This is the fundamental unit of time (in seconds) in terms of which frame timestamps are represented...
Definition: avformat.h:913
#define MKTAG(a, b, c, d)
Definition: common.h:342
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:1090
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_RL32
Definition: bytestream.h:87
This structure stores compressed data.
Definition: avcodec.h:1565
#define av_unused
Definition: attributes.h:126