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 "libavutil/avstring.h"
23 #include "avformat.h"
24 #include "internal.h"
26 #include "libavutil/intreadwrite.h"
27 #include "libavutil/avassert.h"
28 #include "libavutil/opt.h"
29 #include "argo_asf.h"
30 
31 /* Maximum number of blocks to read at once. */
32 #define ASF_NB_BLOCKS 32
33 
34 typedef struct ArgoASFDemuxContext {
37  uint32_t blocks_read;
39 
40 typedef struct ArgoASFMuxContext {
41  const AVClass *class;
44  const char *name;
45  int64_t nb_blocks;
47 
48 void ff_argo_asf_parse_file_header(ArgoASFFileHeader *hdr, const uint8_t *buf)
49 {
50  hdr->magic = AV_RL32(buf + 0);
51  hdr->version_major = AV_RL16(buf + 4);
52  hdr->version_minor = AV_RL16(buf + 6);
53  hdr->num_chunks = AV_RL32(buf + 8);
54  hdr->chunk_offset = AV_RL32(buf + 12);
55  memcpy(hdr->name, buf + 16, ASF_NAME_SIZE);
56  hdr->name[ASF_NAME_SIZE] = '\0';
57 }
58 
60 {
61  if (hdr->magic != ASF_TAG || hdr->num_chunks == 0)
62  return AVERROR_INVALIDDATA;
63 
65  return AVERROR_INVALIDDATA;
66 
67  return 0;
68 }
69 
70 void ff_argo_asf_parse_chunk_header(ArgoASFChunkHeader *hdr, const uint8_t *buf)
71 {
72  hdr->num_blocks = AV_RL32(buf + 0);
73  hdr->num_samples = AV_RL32(buf + 4);
74  hdr->unk1 = AV_RL32(buf + 8);
75  hdr->sample_rate = AV_RL16(buf + 12);
76  hdr->unk2 = AV_RL16(buf + 14);
77  hdr->flags = AV_RL32(buf + 16);
78 }
79 
81  const ArgoASFChunkHeader *ckhdr)
82 {
83  if (ckhdr->num_samples != ASF_SAMPLE_COUNT) {
84  av_log(s, AV_LOG_ERROR, "Invalid sample count. Got %u, expected %d\n",
86  return AVERROR_INVALIDDATA;
87  }
88 
89  if ((ckhdr->flags & ASF_CF_ALWAYS1) != ASF_CF_ALWAYS1 || (ckhdr->flags & ASF_CF_ALWAYS0) != 0) {
90  avpriv_request_sample(s, "Nonstandard flags (0x%08X)", ckhdr->flags);
91  return AVERROR_PATCHWELCOME;
92  }
93 
97 
98  if (ckhdr->flags & ASF_CF_STEREO) {
100  st->codecpar->channels = 2;
101  } else {
103  st->codecpar->channels = 1;
104  }
105 
106  /* v1.1 files (FX Fighter) are all marked as 44100, but are actually 22050. */
107  if (fhdr->version_major == 1 && fhdr->version_minor == 1)
108  st->codecpar->sample_rate = 22050;
109  else
110  st->codecpar->sample_rate = ckhdr->sample_rate;
111 
113 
114  if (!(ckhdr->flags & ASF_CF_BITS_PER_SAMPLE)) {
115  /* The header allows for these, but I've never seen any files with them. */
116  avpriv_request_sample(s, "Non 16-bit samples");
117  return AVERROR_PATCHWELCOME;
118  }
119 
120  /*
121  * (nchannel control bytes) + ((bytes_per_channel) * nchannel)
122  * For mono, this is 17. For stereo, this is 34.
123  */
124  st->codecpar->block_align = st->codecpar->channels +
125  (ckhdr->num_samples / 2) *
126  st->codecpar->channels;
127 
128  st->codecpar->bit_rate = st->codecpar->channels *
129  st->codecpar->sample_rate *
131 
132  avpriv_set_pts_info(st, 64, 1, st->codecpar->sample_rate);
133  st->start_time = 0;
134 
135  if (fhdr->num_chunks == 1) {
136  st->duration = ckhdr->num_blocks * ckhdr->num_samples;
137  st->nb_frames = ckhdr->num_blocks;
138  }
139 
140  return 0;
141 }
142 
143 #if CONFIG_ARGO_ASF_DEMUXER
144 /*
145  * Known versions:
146  * 1.1: https://samples.ffmpeg.org/game-formats/brender/part2.zip
147  * FX Fighter
148  * 1.2: Croc! Legend of the Gobbos
149  * 2.1: Croc 2
150  * The Emperor's New Groove
151  * Disney's Aladdin in Nasira's Revenge
152  */
153 static int argo_asf_is_known_version(const ArgoASFFileHeader *hdr)
154 {
155  return (hdr->version_major == 1 && hdr->version_minor == 1) ||
156  (hdr->version_major == 1 && hdr->version_minor == 2) ||
157  (hdr->version_major == 2 && hdr->version_minor == 1);
158 }
159 
160 static int argo_asf_probe(const AVProbeData *p)
161 {
162  ArgoASFFileHeader hdr;
163 
165 
167 
168  if (hdr.magic != ASF_TAG)
169  return 0;
170 
171  if (!argo_asf_is_known_version(&hdr))
172  return AVPROBE_SCORE_EXTENSION / 2;
173 
174  return AVPROBE_SCORE_EXTENSION + 1;
175 }
176 
177 static int argo_asf_read_header(AVFormatContext *s)
178 {
179  int64_t ret;
180  AVIOContext *pb = s->pb;
181  AVStream *st;
182  ArgoASFDemuxContext *asf = s->priv_data;
183  uint8_t buf[ASF_MIN_BUFFER_SIZE];
184 
185  if (!(st = avformat_new_stream(s, NULL)))
186  return AVERROR(ENOMEM);
187 
188  if ((ret = avio_read(pb, buf, ASF_FILE_HEADER_SIZE)) < 0)
189  return ret;
190  else if (ret != ASF_FILE_HEADER_SIZE)
191  return AVERROR(EIO);
192 
194 
195  if ((ret = ff_argo_asf_validate_file_header(s, &asf->fhdr)) < 0)
196  return ret;
197 
198  /* This should only be 1 in ASF files. >1 is fine if in BRP. */
199  if (asf->fhdr.num_chunks != 1)
200  return AVERROR_INVALIDDATA;
201 
202  if ((ret = avio_skip(pb, asf->fhdr.chunk_offset - ASF_FILE_HEADER_SIZE)) < 0)
203  return ret;
204 
205  if ((ret = avio_read(pb, buf, ASF_CHUNK_HEADER_SIZE)) < 0)
206  return ret;
207  else if (ret != ASF_CHUNK_HEADER_SIZE)
208  return AVERROR(EIO);
209 
211 
212  av_dict_set(&s->metadata, "title", asf->fhdr.name, 0);
213 
214  return ff_argo_asf_fill_stream(s, st, &asf->fhdr, &asf->ckhdr);
215 }
216 
217 static int argo_asf_read_packet(AVFormatContext *s, AVPacket *pkt)
218 {
219  ArgoASFDemuxContext *asf = s->priv_data;
220 
221  AVStream *st = s->streams[0];
222  AVIOContext *pb = s->pb;
223  int ret;
224 
225  if (asf->blocks_read >= asf->ckhdr.num_blocks)
226  return AVERROR_EOF;
227 
230  if (ret < 0)
231  return ret;
232 
233  /* Something real screwy is going on. */
234  if (ret % st->codecpar->block_align != 0)
235  return AVERROR_INVALIDDATA;
236 
237 
238  pkt->stream_index = st->index;
239  pkt->duration = asf->ckhdr.num_samples * (ret / st->codecpar->block_align);
240  pkt->pts = asf->blocks_read * asf->ckhdr.num_samples;
241  asf->blocks_read += (ret / st->codecpar->block_align);
242 
244  return 0;
245 }
246 
247 static int argo_asf_seek(AVFormatContext *s, int stream_index,
248  int64_t pts, int flags)
249 {
250  ArgoASFDemuxContext *asf = s->priv_data;
251  AVStream *st = s->streams[stream_index];
252  int64_t offset;
253  uint32_t block = pts / asf->ckhdr.num_samples;
254 
255  if (block >= asf->ckhdr.num_blocks)
256  return -1;
257 
259  (block * st->codecpar->block_align);
260 
261  if ((offset = avio_seek(s->pb, offset, SEEK_SET)) < 0)
262  return offset;
263 
264  asf->blocks_read = block;
265  return 0;
266 }
267 
268 /*
269  * Not actually sure what ASF stands for.
270  * - Argonaut Sound File?
271  * - Audio Stream File?
272  */
274  .name = "argo_asf",
275  .long_name = NULL_IF_CONFIG_SMALL("Argonaut Games ASF"),
276  .priv_data_size = sizeof(ArgoASFDemuxContext),
277  .read_probe = argo_asf_probe,
278  .read_header = argo_asf_read_header,
279  .read_packet = argo_asf_read_packet,
280  .read_seek = argo_asf_seek,
281 };
282 #endif
283 
284 #if CONFIG_ARGO_ASF_MUXER
285 static int argo_asf_write_init(AVFormatContext *s)
286 {
287  ArgoASFMuxContext *ctx = s->priv_data;
288  const AVCodecParameters *par;
289 
290  if (s->nb_streams != 1) {
291  av_log(s, AV_LOG_ERROR, "ASF files have exactly one stream\n");
292  return AVERROR(EINVAL);
293  }
294 
295  par = s->streams[0]->codecpar;
296 
297  if (par->codec_id != AV_CODEC_ID_ADPCM_ARGO) {
298  av_log(s, AV_LOG_ERROR, "%s codec not supported\n",
299  avcodec_get_name(par->codec_id));
300  return AVERROR(EINVAL);
301  }
302 
303  if (ctx->version_major == 1 && ctx->version_minor == 1 && par->sample_rate != 22050) {
304  av_log(s, AV_LOG_ERROR, "ASF v1.1 files only support a sample rate of 22050\n");
305  return AVERROR(EINVAL);
306  }
307 
308  if (par->channels > 2) {
309  av_log(s, AV_LOG_ERROR, "ASF files only support up to 2 channels\n");
310  return AVERROR(EINVAL);
311  }
312 
313  if (par->block_align != 17 * par->channels)
314  return AVERROR(EINVAL);
315 
316  if (par->sample_rate > UINT16_MAX) {
317  av_log(s, AV_LOG_ERROR, "Sample rate too large\n");
318  return AVERROR(EINVAL);
319  }
320 
321  if (!(s->pb->seekable & AVIO_SEEKABLE_NORMAL)) {
322  av_log(s, AV_LOG_ERROR, "Stream not seekable, unable to write output file\n");
323  return AVERROR(EINVAL);
324  }
325 
326  return 0;
327 }
328 
329 static void argo_asf_write_file_header(const ArgoASFFileHeader *fhdr, AVIOContext *pb)
330 {
331  avio_wl32( pb, fhdr->magic);
332  avio_wl16( pb, fhdr->version_major);
333  avio_wl16( pb, fhdr->version_minor);
334  avio_wl32( pb, fhdr->num_chunks);
335  avio_wl32( pb, fhdr->chunk_offset);
336  avio_write(pb, fhdr->name, ASF_NAME_SIZE);
337 }
338 
339 static void argo_asf_write_chunk_header(const ArgoASFChunkHeader *ckhdr, AVIOContext *pb)
340 {
341  avio_wl32(pb, ckhdr->num_blocks);
342  avio_wl32(pb, ckhdr->num_samples);
343  avio_wl32(pb, ckhdr->unk1);
344  avio_wl16(pb, ckhdr->sample_rate);
345  avio_wl16(pb, ckhdr->unk2);
346  avio_wl32(pb, ckhdr->flags);
347 }
348 
349 static int argo_asf_write_header(AVFormatContext *s)
350 {
351  const AVCodecParameters *par = s->streams[0]->codecpar;
352  ArgoASFMuxContext *ctx = s->priv_data;
353  ArgoASFChunkHeader chdr;
354  ArgoASFFileHeader fhdr = {
355  .magic = ASF_TAG,
356  .version_major = (uint16_t)ctx->version_major,
357  .version_minor = (uint16_t)ctx->version_minor,
358  .num_chunks = 1,
359  .chunk_offset = ASF_FILE_HEADER_SIZE
360  };
362  const char *name, *end;
363  size_t len;
364 
365  /*
366  * If the user specified a name, use it as is. Otherwise,
367  * try to use metadata (if present), then fall back to the
368  * filename (minus extension).
369  */
370  if (ctx->name) {
371  name = ctx->name;
372  len = strlen(ctx->name);
373  } else if ((t = av_dict_get(s->metadata, "title", NULL, 0))) {
374  name = t->value;
375  len = strlen(t->value);
376  } else if (!(end = strrchr((name = av_basename(s->url)), '.'))) {
377  len = strlen(name);
378  } else {
379  len = end - name;
380  }
381  memcpy(fhdr.name, name, FFMIN(len, ASF_NAME_SIZE));
382 
383  chdr.num_blocks = 0;
385  chdr.unk1 = 0;
386 
387  if (ctx->version_major == 1 && ctx->version_minor == 1)
388  chdr.sample_rate = 44100;
389  else
390  chdr.sample_rate = par->sample_rate;
391 
392  chdr.unk2 = ~0;
394 
395  if (par->channels == 2)
396  chdr.flags |= ASF_CF_STEREO;
397 
398  argo_asf_write_file_header(&fhdr, s->pb);
399  argo_asf_write_chunk_header(&chdr, s->pb);
400  return 0;
401 }
402 
403 static int argo_asf_write_packet(AVFormatContext *s, AVPacket *pkt)
404 {
405  ArgoASFMuxContext *ctx = s->priv_data;
406  AVCodecParameters *par = s->streams[0]->codecpar;
407  int nb_blocks = pkt->size / par->block_align;
408 
409  if (pkt->size % par->block_align != 0)
410  return AVERROR_INVALIDDATA;
411 
412  if (ctx->nb_blocks + nb_blocks > UINT32_MAX)
413  return AVERROR_INVALIDDATA;
414 
415  avio_write(s->pb, pkt->data, pkt->size);
416 
417  ctx->nb_blocks += nb_blocks;
418  return 0;
419 }
420 
421 static int argo_asf_write_trailer(AVFormatContext *s)
422 {
423  ArgoASFMuxContext *ctx = s->priv_data;
424  int64_t ret;
425 
426  if ((ret = avio_seek(s->pb, ASF_FILE_HEADER_SIZE, SEEK_SET) < 0))
427  return ret;
428 
429  avio_wl32(s->pb, (uint32_t)ctx->nb_blocks);
430  return 0;
431 }
432 
433 static const AVOption argo_asf_options[] = {
434  {
435  .name = "version_major",
436  .help = "override file major version",
437  .offset = offsetof(ArgoASFMuxContext, version_major),
438  .type = AV_OPT_TYPE_INT,
439  .default_val = {.i64 = 2},
440  .min = 0,
441  .max = UINT16_MAX,
443  },
444  {
445  .name = "version_minor",
446  .help = "override file minor version",
447  .offset = offsetof(ArgoASFMuxContext, version_minor),
448  .type = AV_OPT_TYPE_INT,
449  .default_val = {.i64 = 1},
450  .min = 0,
451  .max = UINT16_MAX,
453  },
454  {
455  .name = "name",
456  .help = "embedded file name (max 8 characters)",
457  .offset = offsetof(ArgoASFMuxContext, name),
458  .type = AV_OPT_TYPE_STRING,
459  .default_val = {.str = NULL},
461  },
462  { NULL }
463 };
464 
465 static const AVClass argo_asf_muxer_class = {
466  .class_name = "argo_asf_muxer",
467  .item_name = av_default_item_name,
468  .option = argo_asf_options,
469  .version = LIBAVUTIL_VERSION_INT
470 };
471 
473  .name = "argo_asf",
474  .long_name = NULL_IF_CONFIG_SMALL("Argonaut Games ASF"),
475  /*
476  * NB: Can't do this as it conflicts with the actual ASF format.
477  * .extensions = "asf",
478  */
479  .audio_codec = AV_CODEC_ID_ADPCM_ARGO,
480  .video_codec = AV_CODEC_ID_NONE,
481  .init = argo_asf_write_init,
482  .write_header = argo_asf_write_header,
483  .write_packet = argo_asf_write_packet,
484  .write_trailer = argo_asf_write_trailer,
485  .priv_class = &argo_asf_muxer_class,
486  .priv_data_size = sizeof(ArgoASFMuxContext)
487 };
488 #endif
ArgoASFChunkHeader::sample_rate
uint16_t sample_rate
Definition: argo_asf.h:51
ff_argo_asf_demuxer
const AVInputFormat ff_argo_asf_demuxer
ArgoASFChunkHeader::num_samples
uint32_t num_samples
Definition: argo_asf.h:49
ArgoASFChunkHeader::flags
uint32_t flags
Definition: argo_asf.h:53
name
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 default minimum maximum flags name is the option name
Definition: writing_filters.txt:88
AVOutputFormat::name
const char * name
Definition: avformat.h:504
AVERROR
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
opt.h
avformat_new_stream
AVStream * avformat_new_stream(AVFormatContext *s, const AVCodec *c)
Add a new stream to a media file.
Definition: utils.c:768
ArgoASFChunkHeader::unk2
uint16_t unk2
Definition: argo_asf.h:52
AVCodecParameters::codec_type
enum AVMediaType codec_type
General type of the encoded data.
Definition: codec_par.h:56
ArgoASFFileHeader::name
char name[ASF_NAME_SIZE+1]
Definition: argo_asf.h:44
AVCodecParameters
This struct describes the properties of an encoded stream.
Definition: codec_par.h:52
AVERROR_EOF
#define AVERROR_EOF
End of file.
Definition: error.h:57
AV_CH_LAYOUT_MONO
#define AV_CH_LAYOUT_MONO
Definition: channel_layout.h:90
ASF_CF_BITS_PER_SAMPLE
@ ASF_CF_BITS_PER_SAMPLE
Definition: argo_asf.h:57
AVPacket::data
uint8_t * data
Definition: packet.h:373
AVOption
AVOption.
Definition: opt.h:247
AVPacket::duration
int64_t duration
Duration of this packet in AVStream->time_base units, 0 if unknown.
Definition: packet.h:391
ArgoASFDemuxContext::fhdr
ArgoASFFileHeader fhdr
Definition: argo_asf.c:35
ff_argo_asf_fill_stream
int ff_argo_asf_fill_stream(AVFormatContext *s, AVStream *st, const ArgoASFFileHeader *fhdr, const ArgoASFChunkHeader *ckhdr)
Definition: argo_asf.c:80
av_basename
const char * av_basename(const char *path)
Thread safe basename.
Definition: avstring.c:260
ASF_NB_BLOCKS
#define ASF_NB_BLOCKS
Definition: argo_asf.c:32
avio_wl16
void avio_wl16(AVIOContext *s, unsigned int val)
Definition: aviobuf.c:466
ASF_FILE_HEADER_SIZE
#define ASF_FILE_HEADER_SIZE
Definition: argo_asf.h:32
AVCodecParameters::channels
int channels
Audio only.
Definition: codec_par.h:166
ArgoASFMuxContext::version_minor
int version_minor
Definition: argo_asf.c:43
ArgoASFFileHeader::version_minor
uint16_t version_minor
Definition: argo_asf.h:41
ArgoASFChunkHeader
Definition: argo_asf.h:47
read_seek
static int read_seek(AVFormatContext *ctx, int stream_index, int64_t timestamp, int flags)
Definition: libcdio.c:149
AVPROBE_PADDING_SIZE
#define AVPROBE_PADDING_SIZE
extra allocated bytes at the end of the probe buffer
Definition: avformat.h:461
pts
static int64_t pts
Definition: transcode_aac.c:653
ArgoASFMuxContext::nb_blocks
int64_t nb_blocks
Definition: argo_asf.c:45
AVStream::duration
int64_t duration
Decoding: duration of the stream, in stream time base.
Definition: avformat.h:985
AV_CH_LAYOUT_STEREO
#define AV_CH_LAYOUT_STEREO
Definition: channel_layout.h:91
avassert.h
pkt
AVPacket * pkt
Definition: movenc.c:59
AV_LOG_ERROR
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:180
AVInputFormat
Definition: avformat.h:650
AV_PKT_FLAG_CORRUPT
#define AV_PKT_FLAG_CORRUPT
The packet content is corrupted.
Definition: packet.h:429
av_dict_get
AVDictionaryEntry * av_dict_get(const AVDictionary *m, const char *key, const AVDictionaryEntry *prev, int flags)
Get a dictionary entry with matching key.
Definition: dict.c:40
intreadwrite.h
ArgoASFMuxContext::name
const char * name
Definition: argo_asf.c:44
s
#define s(width, name)
Definition: cbs_vp9.c:257
AV_OPT_FLAG_ENCODING_PARAM
#define AV_OPT_FLAG_ENCODING_PARAM
a generic parameter which can be set by the user for muxing or encoding
Definition: opt.h:277
ArgoASFFileHeader::num_chunks
uint32_t num_chunks
Definition: argo_asf.h:42
AVInputFormat::name
const char * name
A comma separated list of short names for the format.
Definition: avformat.h:655
AVProbeData::buf
unsigned char * buf
Buffer must have AVPROBE_PADDING_SIZE of extra allocated bytes filled with zero.
Definition: avformat.h:449
AVMEDIA_TYPE_AUDIO
@ AVMEDIA_TYPE_AUDIO
Definition: avutil.h:202
av_assert0
#define av_assert0(cond)
assert() equivalent, that is always enabled.
Definition: avassert.h:37
ctx
AVFormatContext * ctx
Definition: movenc.c:48
ArgoASFDemuxContext
Definition: argo_asf.c:34
AV_RL16
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_WL32 unsigned int_TMPL AV_WL24 unsigned int_TMPL AV_RL16
Definition: bytestream.h:94
ArgoASFDemuxContext::blocks_read
uint32_t blocks_read
Definition: argo_asf.c:37
ASF_CF_STEREO
@ ASF_CF_STEREO
Definition: argo_asf.h:58
AVFormatContext
Format I/O context.
Definition: avformat.h:1200
internal.h
AVStream::codecpar
AVCodecParameters * codecpar
Codec parameters associated with this stream.
Definition: avformat.h:1095
LIBAVUTIL_VERSION_INT
#define LIBAVUTIL_VERSION_INT
Definition: version.h:85
read_header
static int read_header(FFV1Context *f)
Definition: ffv1dec.c:527
AVClass
Describe the class of an AVClass context structure.
Definition: log.h:66
NULL
#define NULL
Definition: coverity.c:32
AVERROR_PATCHWELCOME
#define AVERROR_PATCHWELCOME
Not yet implemented in FFmpeg, patches welcome.
Definition: error.h:64
ArgoASFDemuxContext::ckhdr
ArgoASFChunkHeader ckhdr
Definition: argo_asf.c:36
read_probe
static int read_probe(const AVProbeData *pd)
Definition: jvdec.c:55
AV_CODEC_ID_ADPCM_ARGO
@ AV_CODEC_ID_ADPCM_ARGO
Definition: codec_id.h:395
ff_argo_asf_validate_file_header
int ff_argo_asf_validate_file_header(AVFormatContext *s, const ArgoASFFileHeader *hdr)
Definition: argo_asf.c:59
av_default_item_name
const char * av_default_item_name(void *ptr)
Return the context name.
Definition: log.c:235
AVProbeData
This structure contains the data a format has to probe a file.
Definition: avformat.h:447
argo_asf.h
ASF_CF_ALWAYS0
@ ASF_CF_ALWAYS0
Definition: argo_asf.h:63
AVPROBE_SCORE_EXTENSION
#define AVPROBE_SCORE_EXTENSION
score for file extension
Definition: avformat.h:457
AVCodecParameters::sample_rate
int sample_rate
Audio only.
Definition: codec_par.h:170
AVStream::nb_frames
int64_t nb_frames
number of frames in this stream if known or 0
Definition: avformat.h:987
ArgoASFFileHeader::version_major
uint16_t version_major
Definition: argo_asf.h:40
ASF_SAMPLE_COUNT
#define ASF_SAMPLE_COUNT
Definition: argo_asf.h:34
AVIOContext
Bytestream IO Context.
Definition: avio.h:161
AVPacket::size
int size
Definition: packet.h:374
NULL_IF_CONFIG_SMALL
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification.
Definition: internal.h:117
AVOption::name
const char * name
Definition: opt.h:248
avio_write
void avio_write(AVIOContext *s, const unsigned char *buf, int size)
Definition: aviobuf.c:232
avio_wl32
void avio_wl32(AVIOContext *s, unsigned int val)
Definition: aviobuf.c:386
offset
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
Definition: writing_filters.txt:86
AVPacket::flags
int flags
A combination of AV_PKT_FLAG values.
Definition: packet.h:379
ff_argo_asf_muxer
const AVOutputFormat ff_argo_asf_muxer
ASF_NAME_SIZE
#define ASF_NAME_SIZE
Definition: argo_asf.h:36
AV_SAMPLE_FMT_S16P
@ AV_SAMPLE_FMT_S16P
signed 16 bits, planar
Definition: samplefmt.h:67
avcodec_get_name
const char * avcodec_get_name(enum AVCodecID id)
Get the name of a codec.
Definition: utils.c:443
ArgoASFFileHeader::chunk_offset
uint32_t chunk_offset
Definition: argo_asf.h:43
AV_CODEC_ID_NONE
@ AV_CODEC_ID_NONE
Definition: codec_id.h:48
AVOutputFormat
Definition: avformat.h:503
AVPacket::pts
int64_t pts
Presentation timestamp in AVStream->time_base units; the time at which the decompressed packet will b...
Definition: packet.h:366
AVCodecParameters::block_align
int block_align
Audio only.
Definition: codec_par.h:177
ff_argo_asf_parse_chunk_header
void ff_argo_asf_parse_chunk_header(ArgoASFChunkHeader *hdr, const uint8_t *buf)
Definition: argo_asf.c:70
FFMIN
#define FFMIN(a, b)
Definition: macros.h:49
len
int len
Definition: vorbis_enc_data.h:426
ArgoASFMuxContext
Definition: argo_asf.c:40
av_get_packet
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:197
ret
ret
Definition: filter_design.txt:187
read_packet
static int read_packet(void *opaque, uint8_t *buf, int buf_size)
Definition: avio_reading.c:42
AVStream
Stream structure.
Definition: avformat.h:935
avio_seek
int64_t avio_seek(AVIOContext *s, int64_t offset, int whence)
fseek() equivalent for AVIOContext.
Definition: aviobuf.c:260
AVClass::class_name
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:71
ArgoASFChunkHeader::num_blocks
uint32_t num_blocks
Definition: argo_asf.h:48
avformat.h
AV_RL32
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_RL32
Definition: bytestream.h:92
ArgoASFFileHeader
Definition: argo_asf.h:38
AVStream::index
int index
stream index in AVFormatContext
Definition: avformat.h:943
ArgoASFChunkHeader::unk1
uint32_t unk1
Definition: argo_asf.h:50
channel_layout.h
AVIO_SEEKABLE_NORMAL
#define AVIO_SEEKABLE_NORMAL
Seeking works like for a local file.
Definition: avio.h:40
ASF_CHUNK_HEADER_SIZE
#define ASF_CHUNK_HEADER_SIZE
Definition: argo_asf.h:33
AV_OPT_TYPE_INT
@ AV_OPT_TYPE_INT
Definition: opt.h:224
avio_read
int avio_read(AVIOContext *s, unsigned char *buf, int size)
Read size bytes from AVIOContext into buf.
Definition: aviobuf.c:641
avpriv_set_pts_info
void avpriv_set_pts_info(AVStream *st, 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:1195
AVPacket::stream_index
int stream_index
Definition: packet.h:375
avio_skip
int64_t avio_skip(AVIOContext *s, int64_t offset)
Skip given number of bytes forward.
Definition: aviobuf.c:347
ASF_MIN_BUFFER_SIZE
#define ASF_MIN_BUFFER_SIZE
Definition: argo_asf.h:35
AVCodecParameters::bits_per_coded_sample
int bits_per_coded_sample
The number of bits per sample in the codedwords.
Definition: codec_par.h:102
ff_argo_asf_parse_file_header
void ff_argo_asf_parse_file_header(ArgoASFFileHeader *hdr, const uint8_t *buf)
Definition: argo_asf.c:48
avpriv_request_sample
#define avpriv_request_sample(...)
Definition: tableprint_vlc.h:37
AVCodecParameters::format
int format
Definition: codec_par.h:84
ASF_TAG
#define ASF_TAG
Definition: argo_asf.h:31
AVDictionaryEntry
Definition: dict.h:79
AVCodecParameters::codec_id
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
Definition: codec_par.h:60
AVPacket
This structure stores compressed data.
Definition: packet.h:350
av_dict_set
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
ArgoASFMuxContext::version_major
int version_major
Definition: argo_asf.c:42
AVCodecParameters::channel_layout
uint64_t channel_layout
Audio only.
Definition: codec_par.h:162
flags
#define flags(name, subs,...)
Definition: cbs_av1.c:561
AVCodecParameters::bit_rate
int64_t bit_rate
The average bitrate of the encoded data (in bits per second).
Definition: codec_par.h:89
block
The exact code depends on how similar the blocks are and how related they are to the block
Definition: filter_design.txt:207
av_log
#define av_log(a,...)
Definition: tableprint_vlc.h:28
AVERROR_INVALIDDATA
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:61
AVDictionaryEntry::value
char * value
Definition: dict.h:81
AVStream::start_time
int64_t start_time
Decoding: pts of the first frame of the stream in presentation order, in stream time base.
Definition: avformat.h:975
avstring.h
AV_OPT_TYPE_STRING
@ AV_OPT_TYPE_STRING
Definition: opt.h:228
ASF_CF_ALWAYS1
@ ASF_CF_ALWAYS1
Definition: argo_asf.h:62
ArgoASFFileHeader::magic
uint32_t magic
Definition: argo_asf.h:39