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 
23 #include "config_components.h"
24 
25 #include "libavutil/avstring.h"
26 #include "avformat.h"
27 #include "internal.h"
29 #include "libavutil/intreadwrite.h"
30 #include "libavutil/avassert.h"
31 #include "libavutil/opt.h"
32 #include "argo_asf.h"
33 
34 /* Maximum number of blocks to read at once. */
35 #define ASF_NB_BLOCKS 32
36 
37 typedef struct ArgoASFDemuxContext {
40  uint32_t blocks_read;
42 
43 typedef struct ArgoASFMuxContext {
44  const AVClass *class;
47  const char *name;
48  int64_t nb_blocks;
50 
51 void ff_argo_asf_parse_file_header(ArgoASFFileHeader *hdr, const uint8_t *buf)
52 {
53  hdr->magic = AV_RL32(buf + 0);
54  hdr->version_major = AV_RL16(buf + 4);
55  hdr->version_minor = AV_RL16(buf + 6);
56  hdr->num_chunks = AV_RL32(buf + 8);
57  hdr->chunk_offset = AV_RL32(buf + 12);
58  memcpy(hdr->name, buf + 16, ASF_NAME_SIZE);
59  hdr->name[ASF_NAME_SIZE] = '\0';
60 }
61 
63 {
64  if (hdr->magic != ASF_TAG || hdr->num_chunks == 0)
65  return AVERROR_INVALIDDATA;
66 
68  return AVERROR_INVALIDDATA;
69 
70  return 0;
71 }
72 
73 void ff_argo_asf_parse_chunk_header(ArgoASFChunkHeader *hdr, const uint8_t *buf)
74 {
75  hdr->num_blocks = AV_RL32(buf + 0);
76  hdr->num_samples = AV_RL32(buf + 4);
77  hdr->unk1 = AV_RL32(buf + 8);
78  hdr->sample_rate = AV_RL16(buf + 12);
79  hdr->unk2 = AV_RL16(buf + 14);
80  hdr->flags = AV_RL32(buf + 16);
81 }
82 
84  const ArgoASFChunkHeader *ckhdr)
85 {
86  if (ckhdr->num_samples != ASF_SAMPLE_COUNT) {
87  av_log(s, AV_LOG_ERROR, "Invalid sample count. Got %u, expected %d\n",
89  return AVERROR_INVALIDDATA;
90  }
91 
92  if ((ckhdr->flags & ASF_CF_ALWAYS1) != ASF_CF_ALWAYS1 || (ckhdr->flags & ASF_CF_ALWAYS0) != 0) {
93  avpriv_request_sample(s, "Nonstandard flags (0x%08X)", ckhdr->flags);
94  return AVERROR_PATCHWELCOME;
95  }
96 
100 
101  if (ckhdr->flags & ASF_CF_STEREO) {
103  } else {
105  }
106 
107  /* v1.1 files (FX Fighter) are all marked as 44100, but are actually 22050. */
108  if (fhdr->version_major == 1 && fhdr->version_minor == 1)
109  st->codecpar->sample_rate = 22050;
110  else
111  st->codecpar->sample_rate = ckhdr->sample_rate;
112 
114 
115  if (!(ckhdr->flags & ASF_CF_BITS_PER_SAMPLE)) {
116  /* The header allows for these, but I've never seen any files with them. */
117  avpriv_request_sample(s, "Non 16-bit samples");
118  return AVERROR_PATCHWELCOME;
119  }
120 
121  /*
122  * (nchannel control bytes) + ((bytes_per_channel) * nchannel)
123  * For mono, this is 17. For stereo, this is 34.
124  */
126  (ckhdr->num_samples / 2) *
128 
130  st->codecpar->sample_rate *
132 
133  avpriv_set_pts_info(st, 64, 1, st->codecpar->sample_rate);
134  st->start_time = 0;
135 
136  if (fhdr->num_chunks == 1) {
137  st->duration = ckhdr->num_blocks * ckhdr->num_samples;
138  st->nb_frames = ckhdr->num_blocks;
139  }
140 
141  return 0;
142 }
143 
144 #if CONFIG_ARGO_ASF_DEMUXER
145 /*
146  * Known versions:
147  * 1.1: https://samples.ffmpeg.org/game-formats/brender/part2.zip
148  * FX Fighter
149  * 1.2: Croc! Legend of the Gobbos
150  * 2.1: Croc 2
151  * The Emperor's New Groove
152  * Disney's Aladdin in Nasira's Revenge
153  */
154 static int argo_asf_is_known_version(const ArgoASFFileHeader *hdr)
155 {
156  return (hdr->version_major == 1 && hdr->version_minor == 1) ||
157  (hdr->version_major == 1 && hdr->version_minor == 2) ||
158  (hdr->version_major == 2 && hdr->version_minor == 1);
159 }
160 
161 static int argo_asf_probe(const AVProbeData *p)
162 {
163  ArgoASFFileHeader hdr;
164 
166 
168 
169  if (hdr.magic != ASF_TAG)
170  return 0;
171 
172  if (!argo_asf_is_known_version(&hdr))
173  return AVPROBE_SCORE_EXTENSION / 2;
174 
175  return AVPROBE_SCORE_EXTENSION + 1;
176 }
177 
178 static int argo_asf_read_header(AVFormatContext *s)
179 {
180  int64_t ret;
181  AVIOContext *pb = s->pb;
182  AVStream *st;
183  ArgoASFDemuxContext *asf = s->priv_data;
184  uint8_t buf[ASF_MIN_BUFFER_SIZE];
185 
186  if (!(st = avformat_new_stream(s, NULL)))
187  return AVERROR(ENOMEM);
188 
189  if ((ret = avio_read(pb, buf, ASF_FILE_HEADER_SIZE)) < 0)
190  return ret;
191  else if (ret != ASF_FILE_HEADER_SIZE)
192  return AVERROR(EIO);
193 
195 
196  if ((ret = ff_argo_asf_validate_file_header(s, &asf->fhdr)) < 0)
197  return ret;
198 
199  /* This should only be 1 in ASF files. >1 is fine if in BRP. */
200  if (asf->fhdr.num_chunks != 1)
201  return AVERROR_INVALIDDATA;
202 
203  if ((ret = avio_skip(pb, asf->fhdr.chunk_offset - ASF_FILE_HEADER_SIZE)) < 0)
204  return ret;
205 
206  if ((ret = avio_read(pb, buf, ASF_CHUNK_HEADER_SIZE)) < 0)
207  return ret;
208  else if (ret != ASF_CHUNK_HEADER_SIZE)
209  return AVERROR(EIO);
210 
212 
213  av_dict_set(&s->metadata, "title", asf->fhdr.name, 0);
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 
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 
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 {
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->ch_layout.nb_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->ch_layout.nb_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, ASF_NAME_SIZE);
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  };
363  const char *name, *end;
364  size_t len;
365 
366  /*
367  * If the user specified a name, use it as is. Otherwise,
368  * try to use metadata (if present), then fall back to the
369  * filename (minus extension).
370  */
371  if (ctx->name) {
372  name = ctx->name;
373  len = strlen(ctx->name);
374  } else if ((t = av_dict_get(s->metadata, "title", NULL, 0))) {
375  name = t->value;
376  len = strlen(t->value);
377  } else if (!(end = strrchr((name = av_basename(s->url)), '.'))) {
378  len = strlen(name);
379  } else {
380  len = end - name;
381  }
382  memcpy(fhdr.name, name, FFMIN(len, ASF_NAME_SIZE));
383 
384  chdr.num_blocks = 0;
386  chdr.unk1 = 0;
387 
388  if (ctx->version_major == 1 && ctx->version_minor == 1)
389  chdr.sample_rate = 44100;
390  else
391  chdr.sample_rate = par->sample_rate;
392 
393  chdr.unk2 = ~0;
395 
396  if (par->ch_layout.nb_channels == 2)
397  chdr.flags |= ASF_CF_STEREO;
398 
399  argo_asf_write_file_header(&fhdr, s->pb);
400  argo_asf_write_chunk_header(&chdr, s->pb);
401  return 0;
402 }
403 
404 static int argo_asf_write_packet(AVFormatContext *s, AVPacket *pkt)
405 {
406  ArgoASFMuxContext *ctx = s->priv_data;
407  AVCodecParameters *par = s->streams[0]->codecpar;
408  int nb_blocks = pkt->size / par->block_align;
409 
410  if (pkt->size % par->block_align != 0)
411  return AVERROR_INVALIDDATA;
412 
413  if (ctx->nb_blocks + nb_blocks > UINT32_MAX)
414  return AVERROR_INVALIDDATA;
415 
416  avio_write(s->pb, pkt->data, pkt->size);
417 
418  ctx->nb_blocks += nb_blocks;
419  return 0;
420 }
421 
422 static int argo_asf_write_trailer(AVFormatContext *s)
423 {
424  ArgoASFMuxContext *ctx = s->priv_data;
425  int64_t ret;
426 
427  if ((ret = avio_seek(s->pb, ASF_FILE_HEADER_SIZE, SEEK_SET)) < 0)
428  return ret;
429 
430  avio_wl32(s->pb, (uint32_t)ctx->nb_blocks);
431  return 0;
432 }
433 
434 static const AVOption argo_asf_options[] = {
435  {
436  .name = "version_major",
437  .help = "override file major version",
438  .offset = offsetof(ArgoASFMuxContext, version_major),
439  .type = AV_OPT_TYPE_INT,
440  .default_val = {.i64 = 2},
441  .min = 0,
442  .max = UINT16_MAX,
444  },
445  {
446  .name = "version_minor",
447  .help = "override file minor version",
448  .offset = offsetof(ArgoASFMuxContext, version_minor),
449  .type = AV_OPT_TYPE_INT,
450  .default_val = {.i64 = 1},
451  .min = 0,
452  .max = UINT16_MAX,
454  },
455  {
456  .name = "name",
457  .help = "embedded file name (max 8 characters)",
458  .offset = offsetof(ArgoASFMuxContext, name),
459  .type = AV_OPT_TYPE_STRING,
460  .default_val = {.str = NULL},
462  },
463  { NULL }
464 };
465 
466 static const AVClass argo_asf_muxer_class = {
467  .class_name = "argo_asf_muxer",
468  .item_name = av_default_item_name,
469  .option = argo_asf_options,
470  .version = LIBAVUTIL_VERSION_INT
471 };
472 
474  .name = "argo_asf",
475  .long_name = NULL_IF_CONFIG_SMALL("Argonaut Games ASF"),
476  /*
477  * NB: Can't do this as it conflicts with the actual ASF format.
478  * .extensions = "asf",
479  */
480  .audio_codec = AV_CODEC_ID_ADPCM_ARGO,
481  .video_codec = AV_CODEC_ID_NONE,
482  .init = argo_asf_write_init,
483  .write_header = argo_asf_write_header,
484  .write_packet = argo_asf_write_packet,
485  .write_trailer = argo_asf_write_trailer,
486  .priv_class = &argo_asf_muxer_class,
487  .priv_data_size = sizeof(ArgoASFMuxContext)
488 };
489 #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:510
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: options.c:237
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:57
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:53
AVERROR_EOF
#define AVERROR_EOF
End of file.
Definition: error.h:57
ASF_CF_BITS_PER_SAMPLE
@ ASF_CF_BITS_PER_SAMPLE
Definition: argo_asf.h:57
AVPacket::data
uint8_t * data
Definition: packet.h:374
AVOption
AVOption.
Definition: opt.h:251
AV_CHANNEL_LAYOUT_MONO
#define AV_CHANNEL_LAYOUT_MONO
Definition: channel_layout.h:356
AVPacket::duration
int64_t duration
Duration of this packet in AVStream->time_base units, 0 if unknown.
Definition: packet.h:392
AV_CHANNEL_LAYOUT_STEREO
#define AV_CHANNEL_LAYOUT_STEREO
Definition: channel_layout.h:357
ArgoASFDemuxContext::fhdr
ArgoASFFileHeader fhdr
Definition: argo_asf.c:38
AVChannelLayout::nb_channels
int nb_channels
Number of channels in this layout.
Definition: channel_layout.h:303
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:83
av_basename
const char * av_basename(const char *path)
Thread safe basename.
Definition: avstring.c:263
ASF_NB_BLOCKS
#define ASF_NB_BLOCKS
Definition: argo_asf.c:35
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
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: avformat.c:763
ArgoASFMuxContext::version_minor
int version_minor
Definition: argo_asf.c:46
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:151
AVPROBE_PADDING_SIZE
#define AVPROBE_PADDING_SIZE
extra allocated bytes at the end of the probe buffer
Definition: avformat.h:467
pts
static int64_t pts
Definition: transcode_aac.c:654
ArgoASFMuxContext::nb_blocks
int64_t nb_blocks
Definition: argo_asf.c:48
AVStream::duration
int64_t duration
Decoding: duration of the stream, in stream time base.
Definition: avformat.h:998
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:656
AV_PKT_FLAG_CORRUPT
#define AV_PKT_FLAG_CORRUPT
The packet content is corrupted.
Definition: packet.h:430
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:41
intreadwrite.h
ArgoASFMuxContext::name
const char * name
Definition: argo_asf.c:47
s
#define s(width, name)
Definition: cbs_vp9.c:256
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:281
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:661
AVProbeData::buf
unsigned char * buf
Buffer must have AVPROBE_PADDING_SIZE of extra allocated bytes filled with zero.
Definition: avformat.h:455
AVMEDIA_TYPE_AUDIO
@ AVMEDIA_TYPE_AUDIO
Definition: avutil.h:202
ASF_CF_STEREO
@ ASF_CF_STEREO
Definition: argo_asf.h:58
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:37
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:40
AVFormatContext
Format I/O context.
Definition: avformat.h:1216
internal.h
AVStream::codecpar
AVCodecParameters * codecpar
Codec parameters associated with this stream.
Definition: avformat.h:1108
LIBAVUTIL_VERSION_INT
#define LIBAVUTIL_VERSION_INT
Definition: version.h:85
read_header
static int read_header(FFV1Context *f)
Definition: ffv1dec.c:530
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:39
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:406
ff_argo_asf_validate_file_header
int ff_argo_asf_validate_file_header(AVFormatContext *s, const ArgoASFFileHeader *hdr)
Definition: argo_asf.c:62
av_default_item_name
const char * av_default_item_name(void *ptr)
Return the context name.
Definition: log.c:237
AVProbeData
This structure contains the data a format has to probe a file.
Definition: avformat.h:453
argo_asf.h
AVCodecParameters::ch_layout
AVChannelLayout ch_layout
Audio only.
Definition: codec_par.h:212
AVPROBE_SCORE_EXTENSION
#define AVPROBE_SCORE_EXTENSION
score for file extension
Definition: avformat.h:463
AVCodecParameters::sample_rate
int sample_rate
Audio only.
Definition: codec_par.h:177
AVStream::nb_frames
int64_t nb_frames
number of frames in this stream if known or 0
Definition: avformat.h:1000
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:162
AVPacket::size
int size
Definition: packet.h:375
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:115
AVChannelLayout
An AVChannelLayout holds information about the channel layout of audio data.
Definition: channel_layout.h:293
AVOption::name
const char * name
Definition: opt.h:252
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:380
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:64
avcodec_get_name
const char * avcodec_get_name(enum AVCodecID id)
Get the name of a codec.
Definition: utils.c:436
ArgoASFFileHeader::chunk_offset
uint32_t chunk_offset
Definition: argo_asf.h:43
AV_CODEC_ID_NONE
@ AV_CODEC_ID_NONE
Definition: codec_id.h:50
AVOutputFormat
Definition: avformat.h:509
AVPacket::pts
int64_t pts
Presentation timestamp in AVStream->time_base units; the time at which the decompressed packet will b...
Definition: packet.h:367
ASF_CF_ALWAYS0
@ ASF_CF_ALWAYS0
Definition: argo_asf.h:63
AVCodecParameters::block_align
int block_align
Audio only.
Definition: codec_par.h:184
ff_argo_asf_parse_chunk_header
void ff_argo_asf_parse_chunk_header(ArgoASFChunkHeader *hdr, const uint8_t *buf)
Definition: argo_asf.c:73
FFMIN
#define FFMIN(a, b)
Definition: macros.h:49
len
int len
Definition: vorbis_enc_data.h:426
ArgoASFMuxContext
Definition: argo_asf.c:43
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:102
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:948
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:956
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:41
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:225
avio_read
int avio_read(AVIOContext *s, unsigned char *buf, int size)
Read size bytes from AVIOContext into buf.
Definition: aviobuf.c:641
AVPacket::stream_index
int stream_index
Definition: packet.h:376
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:103
ff_argo_asf_parse_file_header
void ff_argo_asf_parse_file_header(ArgoASFFileHeader *hdr, const uint8_t *buf)
Definition: argo_asf.c:51
avpriv_request_sample
#define avpriv_request_sample(...)
Definition: tableprint_vlc.h:36
AVCodecParameters::format
int format
Definition: codec_par.h:85
ASF_TAG
#define ASF_TAG
Definition: argo_asf.h:31
AVDictionaryEntry
Definition: dict.h:79
ASF_CF_ALWAYS1
@ ASF_CF_ALWAYS1
Definition: argo_asf.h:62
AVCodecParameters::codec_id
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
Definition: codec_par.h:61
AVPacket
This structure stores compressed data.
Definition: packet.h:351
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:71
ArgoASFMuxContext::version_major
int version_major
Definition: argo_asf.c:45
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:90
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:27
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:988
avstring.h
AV_OPT_TYPE_STRING
@ AV_OPT_TYPE_STRING
Definition: opt.h:229
ArgoASFFileHeader::magic
uint32_t magic
Definition: argo_asf.h:39