FFmpeg
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;
43  int64_t nb_blocks;
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 
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 
244  pkt->flags &= ~AV_PKT_FLAG_CORRUPT;
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 
259  offset = asf->fhdr.chunk_offset + ASF_CHUNK_HEADER_SIZE +
260  (block * st->codecpar->block_align);
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 {
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;
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 {
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 {
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
#define NULL
Definition: coverity.c:32
void avio_wl16(AVIOContext *s, unsigned int val)
Definition: aviobuf.c:459
void ff_argo_asf_parse_chunk_header(ArgoASFChunkHeader *hdr, const uint8_t *buf)
Definition: argo_asf.c:68
Bytestream IO Context.
Definition: avio.h:161
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
AVInputFormat ff_argo_asf_demuxer
AVOption.
Definition: opt.h:248
#define LIBAVUTIL_VERSION_INT
Definition: version.h:85
uint32_t flags
Definition: argo_asf.h:52
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:4871
#define avpriv_request_sample(...)
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 index
stream index in AVFormatContext
Definition: avformat.h:881
int size
Definition: packet.h:364
int64_t avio_seek(AVIOContext *s, int64_t offset, int whence)
fseek() equivalent for AVIOContext.
Definition: aviobuf.c:253
const char * av_default_item_name(void *ptr)
Return the context name.
Definition: log.c:235
#define AVPROBE_PADDING_SIZE
extra allocated bytes at the end of the probe buffer
Definition: avformat.h:455
int64_t avio_skip(AVIOContext *s, int64_t offset)
Skip given number of bytes forward.
Definition: aviobuf.c:341
static AVPacket pkt
#define AV_CH_LAYOUT_STEREO
const char * name
Definition: argo_asf.c:42
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_WL32 unsigned int_TMPL AV_WL24 unsigned int_TMPL AV_RL16
Definition: bytestream.h:91
This struct describes the properties of an encoded stream.
Definition: codec_par.h:52
uint32_t chunk_offset
Definition: argo_asf.h:42
Format I/O context.
Definition: avformat.h:1239
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
#define av_assert0(cond)
assert() equivalent, that is always enabled.
Definition: avassert.h:37
const char * name
Definition: opt.h:249
const char * av_basename(const char *path)
Thread safe basename.
Definition: avstring.c:260
void avio_wl32(AVIOContext *s, unsigned int val)
Definition: aviobuf.c:379
The exact code depends on how similar the blocks are and how related they are to the block
uint8_t
AVOptions.
it s the only field you need to keep assuming you have a context There is some magic you don t need to care about around this just let it vf offset
static av_cold int end(AVCodecContext *avctx)
Definition: avrndec.c:92
uint32_t num_samples
Definition: argo_asf.h:48
int64_t duration
Duration of this packet in AVStream->time_base units, 0 if unknown.
Definition: packet.h:381
#define ASF_TAG
Definition: argo_asf.h:31
AVStream * avformat_new_stream(AVFormatContext *s, const AVCodec *c)
Add a new stream to a media file.
Definition: utils.c:4453
AVStream ** streams
A list of all streams in the file.
Definition: avformat.h:1307
int8_t name[8]
Definition: argo_asf.h:43
uint8_t * data
Definition: packet.h:363
#define AVERROR_EOF
End of file.
Definition: error.h:55
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:305
void avio_write(AVIOContext *s, const unsigned char *buf, int size)
Definition: aviobuf.c:225
#define ASF_MIN_BUFFER_SIZE
Definition: argo_asf.h:35
uint64_t channel_layout
Audio only.
Definition: codec_par.h:162
#define av_log(a,...)
#define AV_OPT_FLAG_ENCODING_PARAM
a generic parameter which can be set by the user for muxing or encoding
Definition: opt.h:278
int avio_read(AVIOContext *s, unsigned char *buf, int size)
Read size bytes from AVIOContext into buf.
Definition: aviobuf.c:637
int64_t bit_rate
The average bitrate of the encoded data (in bits per second).
Definition: codec_par.h:89
uint16_t version_major
Definition: argo_asf.h:39
#define AV_RL8(x)
Definition: intreadwrite.h:398
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:194
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:153
char * url
input or output URL.
Definition: avformat.h:1335
enum AVMediaType codec_type
General type of the encoded data.
Definition: codec_par.h:56
simple assert() macros that are a bit more flexible than ISO C assert().
uint16_t version_minor
Definition: argo_asf.h:40
int flags
A combination of AV_PKT_FLAG values.
Definition: packet.h:369
AVOutputFormat ff_argo_asf_muxer
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:1295
int block_align
Audio only.
Definition: codec_par.h:177
int seekable
A combination of AVIO_SEEKABLE_ flags or 0 when the stream is not seekable.
Definition: avio.h:260
#define FFMIN(a, b)
Definition: common.h:96
uint32_t num_chunks
Definition: argo_asf.h:41
int ff_argo_asf_validate_file_header(AVFormatContext *s, const ArgoASFFileHeader *hdr)
Definition: argo_asf.c:57
const char * name
Definition: avformat.h:500
AVFormatContext * ctx
Definition: movenc.c:48
#define s(width, name)
Definition: cbs_vp9.c:257
ArgoASFFileHeader fhdr
Definition: argo_asf.c:33
ArgoASFChunkHeader ckhdr
Definition: argo_asf.c:34
void ff_argo_asf_parse_file_header(ArgoASFFileHeader *hdr, const uint8_t *buf)
Definition: argo_asf.c:46
#define FF_ARRAY_ELEMS(a)
static int read_header(FFV1Context *f)
Definition: ffv1dec.c:527
Stream structure.
Definition: avformat.h:880
#define AVERROR_PATCHWELCOME
Not yet implemented in FFmpeg, patches welcome.
Definition: error.h:62
static int read_packet(void *opaque, uint8_t *buf, int buf_size)
Definition: avio_reading.c:42
int64_t nb_blocks
Definition: argo_asf.c:43
#define AVIO_SEEKABLE_NORMAL
Seeking works like for a local file.
Definition: avio.h:40
#define ASF_CHUNK_HEADER_SIZE
Definition: argo_asf.h:33
AVIOContext * pb
I/O context.
Definition: avformat.h:1281
uint32_t blocks_read
Definition: argo_asf.c:35
uint32_t magic
Definition: argo_asf.h:38
Describe the class of an AVClass context structure.
Definition: log.h:67
#define ASF_SAMPLE_COUNT
Definition: argo_asf.h:34
#define AVPROBE_SCORE_EXTENSION
score for file extension
Definition: avformat.h:451
This structure contains the data a format has to probe a file.
Definition: avformat.h:441
uint32_t unk1
Definition: argo_asf.h:49
static int64_t pts
#define flags(name, subs,...)
Definition: cbs_av1.c:560
int bits_per_raw_sample
This is the number of valid bits in each output sample.
Definition: codec_par.h:115
static int read_probe(const AVProbeData *pd)
Definition: jvdec.c:55
int64_t duration
Decoding: duration of the stream, in stream time base.
Definition: avformat.h:929
int sample_rate
Audio only.
Definition: codec_par.h:170
Main libavformat public API header.
int64_t start_time
Decoding: pts of the first frame of the stream in presentation order, in stream time base...
Definition: avformat.h:919
uint32_t num_blocks
Definition: argo_asf.h:47
const char * avcodec_get_name(enum AVCodecID id)
Get the name of a codec.
Definition: utils.c:1200
int64_t nb_frames
number of frames in this stream if known or 0
Definition: avformat.h:931
#define AV_PKT_FLAG_CORRUPT
The packet content is corrupted.
Definition: packet.h:402
uint16_t sample_rate
Definition: argo_asf.h:50
int len
void * priv_data
Format private data.
Definition: avformat.h:1267
#define ASF_NB_BLOCKS
Definition: argo_asf.c:30
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
#define ASF_FILE_HEADER_SIZE
Definition: argo_asf.h:32
const char * name
A comma separated list of short names for the format.
Definition: avformat.h:652
signed 16 bits, planar
Definition: samplefmt.h:67
AVCodecParameters * codecpar
Codec parameters associated with this stream.
Definition: avformat.h:1045
int stream_index
Definition: packet.h:365
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 AV_CH_LAYOUT_MONO
int ff_argo_asf_fill_stream(AVFormatContext *s, AVStream *st, const ArgoASFFileHeader *fhdr, const ArgoASFChunkHeader *ckhdr)
Definition: argo_asf.c:78
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_RL32
Definition: bytestream.h:91
This structure stores compressed data.
Definition: packet.h:340
int64_t pts
Presentation timestamp in AVStream->time_base units; the time at which the decompressed packet will b...
Definition: packet.h:356
int i
Definition: input.c:407
uint16_t unk2
Definition: argo_asf.h:51
const char * name
Definition: opengl_enc.c:102