FFmpeg  4.4.6
argo_asf.c
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1 /*
2  * Argonaut Games ASF (de)muxer
3  *
4  * Copyright (C) 2020 Zane van Iperen (zane@zanevaniperen.com)
5  *
6  * This file is part of FFmpeg.
7  *
8  * FFmpeg is free software; you can redistribute it and/or
9  * modify it under the terms of the GNU Lesser General Public
10  * License as published by the Free Software Foundation; either
11  * version 2.1 of the License, or (at your option) any later version.
12  *
13  * FFmpeg is distributed in the hope that it will be useful,
14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16  * Lesser General Public License for more details.
17  *
18  * You should have received a copy of the GNU Lesser General Public
19  * License along with FFmpeg; if not, write to the Free Software
20  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21  */
22 #include "avformat.h"
23 #include "internal.h"
24 #include "libavutil/intreadwrite.h"
25 #include "libavutil/avassert.h"
26 #include "libavutil/opt.h"
27 #include "argo_asf.h"
28 
29 /* Maximum number of blocks to read at once. */
30 #define ASF_NB_BLOCKS 32
31 
32 typedef struct ArgoASFDemuxContext {
35  uint32_t blocks_read;
37 
38 typedef struct ArgoASFMuxContext {
39  const AVClass *class;
42  const char *name;
45 
47 {
48  hdr->magic = AV_RL32(buf + 0);
49  hdr->version_major = AV_RL16(buf + 4);
50  hdr->version_minor = AV_RL16(buf + 6);
51  hdr->num_chunks = AV_RL32(buf + 8);
52  hdr->chunk_offset = AV_RL32(buf + 12);
53  for (int i = 0; i < FF_ARRAY_ELEMS(hdr->name); i++)
54  hdr->name[i] = AV_RL8(buf + 16 + i);
55 }
56 
58 {
59  if (hdr->magic != ASF_TAG || hdr->num_chunks == 0)
60  return AVERROR_INVALIDDATA;
61 
63  return AVERROR_INVALIDDATA;
64 
65  return 0;
66 }
67 
69 {
70  hdr->num_blocks = AV_RL32(buf + 0);
71  hdr->num_samples = AV_RL32(buf + 4);
72  hdr->unk1 = AV_RL32(buf + 8);
73  hdr->sample_rate = AV_RL16(buf + 12);
74  hdr->unk2 = AV_RL16(buf + 14);
75  hdr->flags = AV_RL32(buf + 16);
76 }
77 
79  const ArgoASFChunkHeader *ckhdr)
80 {
81  if (ckhdr->num_samples != ASF_SAMPLE_COUNT) {
82  av_log(s, AV_LOG_ERROR, "Invalid sample count. Got %u, expected %d\n",
84  return AVERROR_INVALIDDATA;
85  }
86 
87  if ((ckhdr->flags & ASF_CF_ALWAYS1) != ASF_CF_ALWAYS1 || (ckhdr->flags & ASF_CF_ALWAYS0) != 0) {
88  avpriv_request_sample(s, "Nonstandard flags (0x%08X)", ckhdr->flags);
89  return AVERROR_PATCHWELCOME;
90  }
91 
95 
96  if (ckhdr->flags & ASF_CF_STEREO) {
98  st->codecpar->channels = 2;
99  } else {
101  st->codecpar->channels = 1;
102  }
103 
104  /* v1.1 files (FX Fighter) are all marked as 44100, but are actually 22050. */
105  if (fhdr->version_major == 1 && fhdr->version_minor == 1)
106  st->codecpar->sample_rate = 22050;
107  else
108  st->codecpar->sample_rate = ckhdr->sample_rate;
109 
111 
112  if (ckhdr->flags & ASF_CF_BITS_PER_SAMPLE)
113  st->codecpar->bits_per_raw_sample = 16;
114  else
115  st->codecpar->bits_per_raw_sample = 8;
116 
117  if (st->codecpar->bits_per_raw_sample != 16) {
118  /* The header allows for these, but I've never seen any files with them. */
119  avpriv_request_sample(s, "Non 16-bit samples");
120  return AVERROR_PATCHWELCOME;
121  }
122 
123  /*
124  * (nchannel control bytes) + ((bytes_per_channel) * nchannel)
125  * For mono, this is 17. For stereo, this is 34.
126  */
127  st->codecpar->block_align = st->codecpar->channels +
128  (ckhdr->num_samples / 2) *
129  st->codecpar->channels;
130 
131  st->codecpar->bit_rate = st->codecpar->channels *
132  st->codecpar->sample_rate *
134 
135  avpriv_set_pts_info(st, 64, 1, st->codecpar->sample_rate);
136  st->start_time = 0;
137 
138  if (fhdr->num_chunks == 1) {
139  st->duration = ckhdr->num_blocks * ckhdr->num_samples;
140  st->nb_frames = ckhdr->num_blocks;
141  }
142 
143  return 0;
144 }
145 
146 #if CONFIG_ARGO_ASF_DEMUXER
147 /*
148  * Known versions:
149  * 1.1: https://samples.ffmpeg.org/game-formats/brender/part2.zip
150  * FX Fighter
151  * 1.2: Croc! Legend of the Gobbos
152  * 2.1: Croc 2
153  * The Emperor's New Groove
154  * Disney's Aladdin in Nasira's Revenge
155  */
156 static int argo_asf_is_known_version(const ArgoASFFileHeader *hdr)
157 {
158  return (hdr->version_major == 1 && hdr->version_minor == 1) ||
159  (hdr->version_major == 1 && hdr->version_minor == 2) ||
160  (hdr->version_major == 2 && hdr->version_minor == 1);
161 }
162 
163 static int argo_asf_probe(const AVProbeData *p)
164 {
165  ArgoASFFileHeader hdr;
166 
168 
170 
171  if (hdr.magic != ASF_TAG)
172  return 0;
173 
174  if (!argo_asf_is_known_version(&hdr))
175  return AVPROBE_SCORE_EXTENSION / 2;
176 
177  return AVPROBE_SCORE_EXTENSION + 1;
178 }
179 
180 static int argo_asf_read_header(AVFormatContext *s)
181 {
182  int64_t ret;
183  AVIOContext *pb = s->pb;
184  AVStream *st;
185  ArgoASFDemuxContext *asf = s->priv_data;
187 
188  if (!(st = avformat_new_stream(s, NULL)))
189  return AVERROR(ENOMEM);
190 
191  if ((ret = avio_read(pb, buf, ASF_FILE_HEADER_SIZE)) < 0)
192  return ret;
193  else if (ret != ASF_FILE_HEADER_SIZE)
194  return AVERROR(EIO);
195 
197 
198  if ((ret = ff_argo_asf_validate_file_header(s, &asf->fhdr)) < 0)
199  return ret;
200 
201  /* This should only be 1 in ASF files. >1 is fine if in BRP. */
202  if (asf->fhdr.num_chunks != 1)
203  return AVERROR_INVALIDDATA;
204 
205  if ((ret = avio_skip(pb, asf->fhdr.chunk_offset - ASF_FILE_HEADER_SIZE)) < 0)
206  return ret;
207 
208  if ((ret = avio_read(pb, buf, ASF_CHUNK_HEADER_SIZE)) < 0)
209  return ret;
210  else if (ret != ASF_CHUNK_HEADER_SIZE)
211  return AVERROR(EIO);
212 
214 
215  return ff_argo_asf_fill_stream(s, st, &asf->fhdr, &asf->ckhdr);
216 }
217 
218 static int argo_asf_read_packet(AVFormatContext *s, AVPacket *pkt)
219 {
220  ArgoASFDemuxContext *asf = s->priv_data;
221 
222  AVStream *st = s->streams[0];
223  AVIOContext *pb = s->pb;
224  int ret;
225 
226  if (asf->blocks_read >= asf->ckhdr.num_blocks)
227  return AVERROR_EOF;
228 
229  ret = av_get_packet(pb, pkt, st->codecpar->block_align *
231  if (ret < 0)
232  return ret;
233 
234  /* Something real screwy is going on. */
235  if (ret % st->codecpar->block_align != 0)
236  return AVERROR_INVALIDDATA;
237 
238 
239  pkt->stream_index = st->index;
240  pkt->duration = asf->ckhdr.num_samples * (ret / st->codecpar->block_align);
241  pkt->pts = asf->blocks_read * asf->ckhdr.num_samples;
242  asf->blocks_read += (ret / st->codecpar->block_align);
243 
245  return 0;
246 }
247 
248 static int argo_asf_seek(AVFormatContext *s, int stream_index,
249  int64_t pts, int flags)
250 {
251  ArgoASFDemuxContext *asf = s->priv_data;
252  AVStream *st = s->streams[stream_index];
253  int64_t offset;
254  uint32_t block = pts / asf->ckhdr.num_samples;
255 
256  if (block >= asf->ckhdr.num_blocks)
257  return -1;
258 
261 
262  if ((offset = avio_seek(s->pb, offset, SEEK_SET)) < 0)
263  return offset;
264 
265  asf->blocks_read = block;
266  return 0;
267 }
268 
269 /*
270  * Not actually sure what ASF stands for.
271  * - Argonaut Sound File?
272  * - Audio Stream File?
273  */
275  .name = "argo_asf",
276  .long_name = NULL_IF_CONFIG_SMALL("Argonaut Games ASF"),
277  .priv_data_size = sizeof(ArgoASFDemuxContext),
278  .read_probe = argo_asf_probe,
279  .read_header = argo_asf_read_header,
280  .read_packet = argo_asf_read_packet,
281  .read_seek = argo_asf_seek,
282 };
283 #endif
284 
285 #if CONFIG_ARGO_ASF_MUXER
286 static int argo_asf_write_init(AVFormatContext *s)
287 {
288  ArgoASFMuxContext *ctx = s->priv_data;
289  const AVCodecParameters *par;
290 
291  if (s->nb_streams != 1) {
292  av_log(s, AV_LOG_ERROR, "ASF files have exactly one stream\n");
293  return AVERROR(EINVAL);
294  }
295 
296  par = s->streams[0]->codecpar;
297 
298  if (par->codec_id != AV_CODEC_ID_ADPCM_ARGO) {
299  av_log(s, AV_LOG_ERROR, "%s codec not supported\n",
300  avcodec_get_name(par->codec_id));
301  return AVERROR(EINVAL);
302  }
303 
304  if (ctx->version_major == 1 && ctx->version_minor == 1 && par->sample_rate != 22050) {
305  av_log(s, AV_LOG_ERROR, "ASF v1.1 files only support a sample rate of 22050\n");
306  return AVERROR(EINVAL);
307  }
308 
309  if (par->channels > 2) {
310  av_log(s, AV_LOG_ERROR, "ASF files only support up to 2 channels\n");
311  return AVERROR(EINVAL);
312  }
313 
314  if (par->block_align != 17 * par->channels)
315  return AVERROR(EINVAL);
316 
317  if (par->sample_rate > UINT16_MAX) {
318  av_log(s, AV_LOG_ERROR, "Sample rate too large\n");
319  return AVERROR(EINVAL);
320  }
321 
322  if (!(s->pb->seekable & AVIO_SEEKABLE_NORMAL)) {
323  av_log(s, AV_LOG_ERROR, "Stream not seekable, unable to write output file\n");
324  return AVERROR(EINVAL);
325  }
326 
327  return 0;
328 }
329 
330 static void argo_asf_write_file_header(const ArgoASFFileHeader *fhdr, AVIOContext *pb)
331 {
332  avio_wl32( pb, fhdr->magic);
333  avio_wl16( pb, fhdr->version_major);
334  avio_wl16( pb, fhdr->version_minor);
335  avio_wl32( pb, fhdr->num_chunks);
336  avio_wl32( pb, fhdr->chunk_offset);
337  avio_write(pb, fhdr->name, sizeof(fhdr->name));
338 }
339 
340 static void argo_asf_write_chunk_header(const ArgoASFChunkHeader *ckhdr, AVIOContext *pb)
341 {
342  avio_wl32(pb, ckhdr->num_blocks);
343  avio_wl32(pb, ckhdr->num_samples);
344  avio_wl32(pb, ckhdr->unk1);
345  avio_wl16(pb, ckhdr->sample_rate);
346  avio_wl16(pb, ckhdr->unk2);
347  avio_wl32(pb, ckhdr->flags);
348 }
349 
350 static int argo_asf_write_header(AVFormatContext *s)
351 {
352  const AVCodecParameters *par = s->streams[0]->codecpar;
353  ArgoASFMuxContext *ctx = s->priv_data;
354  ArgoASFChunkHeader chdr;
355  ArgoASFFileHeader fhdr = {
356  .magic = ASF_TAG,
357  .version_major = (uint16_t)ctx->version_major,
358  .version_minor = (uint16_t)ctx->version_minor,
359  .num_chunks = 1,
360  .chunk_offset = ASF_FILE_HEADER_SIZE
361  };
362 
363  /*
364  * If the user specified a name, use it as is. Otherwise take the
365  * basename and lop off the extension (if any).
366  */
367  if (ctx->name) {
368  strncpy(fhdr.name, ctx->name, sizeof(fhdr.name));
369  } else {
370  const char *start = av_basename(s->url);
371  const char *end = strrchr(start, '.');
372  size_t len;
373 
374  if (end)
375  len = end - start;
376  else
377  len = strlen(start);
378 
379  memcpy(fhdr.name, start, FFMIN(len, sizeof(fhdr.name)));
380  }
381 
382  chdr.num_blocks = 0;
384  chdr.unk1 = 0;
385 
386  if (ctx->version_major == 1 && ctx->version_minor == 1)
387  chdr.sample_rate = 44100;
388  else
389  chdr.sample_rate = par->sample_rate;
390 
391  chdr.unk2 = ~0;
393 
394  if (par->channels == 2)
395  chdr.flags |= ASF_CF_STEREO;
396 
397  argo_asf_write_file_header(&fhdr, s->pb);
398  argo_asf_write_chunk_header(&chdr, s->pb);
399  return 0;
400 }
401 
402 static int argo_asf_write_packet(AVFormatContext *s, AVPacket *pkt)
403 {
404  ArgoASFMuxContext *ctx = s->priv_data;
405  AVCodecParameters *par = s->streams[0]->codecpar;
406  int nb_blocks = pkt->size / par->block_align;
407 
408  if (pkt->size % par->block_align != 0)
409  return AVERROR_INVALIDDATA;
410 
411  if (ctx->nb_blocks + nb_blocks > UINT32_MAX)
412  return AVERROR_INVALIDDATA;
413 
414  avio_write(s->pb, pkt->data, pkt->size);
415 
416  ctx->nb_blocks += nb_blocks;
417  return 0;
418 }
419 
420 static int argo_asf_write_trailer(AVFormatContext *s)
421 {
422  ArgoASFMuxContext *ctx = s->priv_data;
423  int64_t ret;
424 
425  if ((ret = avio_seek(s->pb, ASF_FILE_HEADER_SIZE, SEEK_SET)) < 0)
426  return ret;
427 
428  avio_wl32(s->pb, (uint32_t)ctx->nb_blocks);
429  return 0;
430 }
431 
432 static const AVOption argo_asf_options[] = {
433  {
434  .name = "version_major",
435  .help = "override file major version",
436  .offset = offsetof(ArgoASFMuxContext, version_major),
437  .type = AV_OPT_TYPE_INT,
438  .default_val = {.i64 = 2},
439  .min = 0,
440  .max = UINT16_MAX,
442  },
443  {
444  .name = "version_minor",
445  .help = "override file minor version",
446  .offset = offsetof(ArgoASFMuxContext, version_minor),
447  .type = AV_OPT_TYPE_INT,
448  .default_val = {.i64 = 1},
449  .min = 0,
450  .max = UINT16_MAX,
452  },
453  {
454  .name = "name",
455  .help = "embedded file name (max 8 characters)",
456  .offset = offsetof(ArgoASFMuxContext, name),
457  .type = AV_OPT_TYPE_STRING,
458  .default_val = {.str = NULL},
460  },
461  { NULL }
462 };
463 
464 static const AVClass argo_asf_muxer_class = {
465  .class_name = "argo_asf_muxer",
466  .item_name = av_default_item_name,
467  .option = argo_asf_options,
468  .version = LIBAVUTIL_VERSION_INT
469 };
470 
472  .name = "argo_asf",
473  .long_name = NULL_IF_CONFIG_SMALL("Argonaut Games ASF"),
474  /*
475  * NB: Can't do this as it conflicts with the actual ASF format.
476  * .extensions = "asf",
477  */
478  .audio_codec = AV_CODEC_ID_ADPCM_ARGO,
479  .video_codec = AV_CODEC_ID_NONE,
480  .init = argo_asf_write_init,
481  .write_header = argo_asf_write_header,
482  .write_packet = argo_asf_write_packet,
483  .write_trailer = argo_asf_write_trailer,
484  .priv_class = &argo_asf_muxer_class,
485  .priv_data_size = sizeof(ArgoASFMuxContext)
486 };
487 #endif
AVOutputFormat ff_argo_asf_muxer
AVInputFormat ff_argo_asf_demuxer
int ff_argo_asf_validate_file_header(AVFormatContext *s, const ArgoASFFileHeader *hdr)
Definition: argo_asf.c:57
void ff_argo_asf_parse_file_header(ArgoASFFileHeader *hdr, const uint8_t *buf)
Definition: argo_asf.c:46
#define ASF_NB_BLOCKS
Definition: argo_asf.c:30
int ff_argo_asf_fill_stream(AVFormatContext *s, AVStream *st, const ArgoASFFileHeader *fhdr, const ArgoASFChunkHeader *ckhdr)
Definition: argo_asf.c:78
void ff_argo_asf_parse_chunk_header(ArgoASFChunkHeader *hdr, const uint8_t *buf)
Definition: argo_asf.c:68
@ ASF_CF_ALWAYS0
Definition: argo_asf.h:62
@ ASF_CF_STEREO
Definition: argo_asf.h:57
@ ASF_CF_BITS_PER_SAMPLE
Definition: argo_asf.h:56
@ ASF_CF_ALWAYS1
Definition: argo_asf.h:61
#define ASF_SAMPLE_COUNT
Definition: argo_asf.h:34
#define ASF_CHUNK_HEADER_SIZE
Definition: argo_asf.h:33
#define ASF_TAG
Definition: argo_asf.h:31
#define ASF_FILE_HEADER_SIZE
Definition: argo_asf.h:32
#define ASF_MIN_BUFFER_SIZE
Definition: argo_asf.h:35
uint8_t
simple assert() macros that are a bit more flexible than ISO C assert().
#define av_assert0(cond)
assert() equivalent, that is always enabled.
Definition: avassert.h:37
Main libavformat public API header.
#define AVPROBE_PADDING_SIZE
extra allocated bytes at the end of the probe buffer
Definition: avformat.h:455
#define AVPROBE_SCORE_EXTENSION
score for file extension
Definition: avformat.h:451
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
void avio_wl32(AVIOContext *s, unsigned int val)
Definition: aviobuf.c:375
void avio_wl16(AVIOContext *s, unsigned int val)
Definition: aviobuf.c:455
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
void avio_write(AVIOContext *s, const unsigned char *buf, int size)
Definition: aviobuf.c:225
static int read_packet(void *opaque, uint8_t *buf, int buf_size)
Definition: avio_reading.c:42
#define AV_RL16
Definition: intreadwrite.h:42
#define AV_RL32
Definition: intreadwrite.h:146
#define flags(name, subs,...)
Definition: cbs_av1.c:572
#define s(width, name)
Definition: cbs_vp9.c:257
#define FFMIN(a, b)
Definition: common.h:105
#define NULL
Definition: coverity.c:32
long long int64_t
Definition: coverity.c:34
static int read_header(FFV1Context *f)
Definition: ffv1dec.c:545
@ AV_OPT_TYPE_INT
Definition: opt.h:225
@ AV_OPT_TYPE_STRING
Definition: opt.h:229
#define AV_CH_LAYOUT_MONO
#define AV_CH_LAYOUT_STEREO
const char * avcodec_get_name(enum AVCodecID id)
Get the name of a codec.
Definition: utils.c:480
@ AV_CODEC_ID_NONE
Definition: codec_id.h:47
@ AV_CODEC_ID_ADPCM_ARGO
Definition: codec_id.h:396
#define AV_PKT_FLAG_CORRUPT
The packet content is corrupted.
Definition: packet.h:411
AVStream * avformat_new_stream(AVFormatContext *s, const AVCodec *c)
Add a new stream to a media file.
Definition: utils.c:4509
#define AVERROR_PATCHWELCOME
Not yet implemented in FFmpeg, patches welcome.
Definition: error.h:62
#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_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:194
const char * av_default_item_name(void *ptr)
Return the context name.
Definition: log.c:235
@ AVMEDIA_TYPE_AUDIO
Definition: avutil.h:202
@ AV_SAMPLE_FMT_S16P
signed 16 bits, planar
Definition: samplefmt.h:67
const char * av_basename(const char *path)
Thread safe basename.
Definition: avstring.c:260
#define LIBAVUTIL_VERSION_INT
Definition: version.h:85
int i
Definition: input.c:407
#define AV_RL8(x)
Definition: intreadwrite.h:398
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:4945
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
AVOptions.
#define AV_OPT_FLAG_ENCODING_PARAM
a generic parameter which can be set by the user for muxing or encoding
Definition: opt.h:278
const char * name
Definition: qsvenc.c:46
#define FF_ARRAY_ELEMS(a)
Describe the class of an AVClass context structure.
Definition: log.h:67
const char * class_name
The name of the class; usually it is the same name as the context structure type to which the AVClass...
Definition: log.h:72
This struct describes the properties of an encoded stream.
Definition: codec_par.h:52
uint64_t channel_layout
Audio only.
Definition: codec_par.h:162
int bits_per_coded_sample
The number of bits per sample in the codedwords.
Definition: codec_par.h:102
int channels
Audio only.
Definition: codec_par.h:166
int64_t bit_rate
The average bitrate of the encoded data (in bits per second).
Definition: codec_par.h:89
enum AVMediaType codec_type
General type of the encoded data.
Definition: codec_par.h:56
int block_align
Audio only.
Definition: codec_par.h:177
int bits_per_raw_sample
This is the number of valid bits in each output sample.
Definition: codec_par.h:115
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
Bytestream IO Context.
Definition: avio.h:161
const char * name
A comma separated list of short names for the format.
Definition: avformat.h:645
AVOption.
Definition: opt.h:248
const char * name
Definition: opt.h:249
const char * name
Definition: avformat.h:491
This structure stores compressed data.
Definition: packet.h:346
int stream_index
Definition: packet.h:371
int flags
A combination of AV_PKT_FLAG values.
Definition: packet.h:375
int size
Definition: packet.h:370
int64_t duration
Duration of this packet in AVStream->time_base units, 0 if unknown.
Definition: packet.h:387
int64_t pts
Presentation timestamp in AVStream->time_base units; the time at which the decompressed packet will b...
Definition: packet.h:362
uint8_t * data
Definition: packet.h:369
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
Stream structure.
Definition: avformat.h:873
AVCodecParameters * codecpar
Codec parameters associated with this stream.
Definition: avformat.h:1038
int64_t nb_frames
number of frames in this stream if known or 0
Definition: avformat.h:924
int64_t duration
Decoding: duration of the stream, in stream time base.
Definition: avformat.h:922
int index
stream index in AVFormatContext
Definition: avformat.h:874
int64_t start_time
Decoding: pts of the first frame of the stream in presentation order, in stream time base.
Definition: avformat.h:912
uint32_t num_blocks
Definition: argo_asf.h:47
uint16_t unk2
Definition: argo_asf.h:51
uint16_t sample_rate
Definition: argo_asf.h:50
uint32_t unk1
Definition: argo_asf.h:49
uint32_t num_samples
Definition: argo_asf.h:48
uint32_t flags
Definition: argo_asf.h:52
uint32_t blocks_read
Definition: argo_asf.c:35
ArgoASFChunkHeader ckhdr
Definition: argo_asf.c:34
ArgoASFFileHeader fhdr
Definition: argo_asf.c:33
uint32_t magic
Definition: argo_asf.h:38
uint32_t num_chunks
Definition: argo_asf.h:41
uint16_t version_minor
Definition: argo_asf.h:40
int8_t name[8]
Definition: argo_asf.h:43
uint32_t chunk_offset
Definition: argo_asf.h:42
uint16_t version_major
Definition: argo_asf.h:39
const char * name
Definition: argo_asf.c:42
int64_t nb_blocks
Definition: argo_asf.c:43
#define avpriv_request_sample(...)
#define av_log(a,...)
static int16_t block[64]
Definition: dct.c:116
AVPacket * pkt
Definition: movenc.c:59
AVFormatContext * ctx
Definition: movenc.c:48
static int64_t pts
if(ret< 0)
Definition: vf_mcdeint.c:282
static const uint8_t offset[127][2]
Definition: vf_spp.c:107
int len