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"
28 #include "mux.h"
30 #include "libavutil/intreadwrite.h"
31 #include "libavutil/avassert.h"
32 #include "libavutil/opt.h"
33 #include "argo_asf.h"
34 
35 /* Maximum number of blocks to read at once. */
36 #define ASF_NB_BLOCKS 32
37 
38 typedef struct ArgoASFDemuxContext {
41  uint32_t blocks_read;
43 
44 typedef struct ArgoASFMuxContext {
45  const AVClass *class;
48  const char *name;
49  int64_t nb_blocks;
51 
52 void ff_argo_asf_parse_file_header(ArgoASFFileHeader *hdr, const uint8_t *buf)
53 {
54  hdr->magic = AV_RL32(buf + 0);
55  hdr->version_major = AV_RL16(buf + 4);
56  hdr->version_minor = AV_RL16(buf + 6);
57  hdr->num_chunks = AV_RL32(buf + 8);
58  hdr->chunk_offset = AV_RL32(buf + 12);
59  memcpy(hdr->name, buf + 16, ASF_NAME_SIZE);
60  hdr->name[ASF_NAME_SIZE] = '\0';
61 }
62 
64 {
65  if (hdr->magic != ASF_TAG || hdr->num_chunks == 0)
66  return AVERROR_INVALIDDATA;
67 
69  return AVERROR_INVALIDDATA;
70 
71  return 0;
72 }
73 
74 void ff_argo_asf_parse_chunk_header(ArgoASFChunkHeader *hdr, const uint8_t *buf)
75 {
76  hdr->num_blocks = AV_RL32(buf + 0);
77  hdr->num_samples = AV_RL32(buf + 4);
78  hdr->unk1 = AV_RL32(buf + 8);
79  hdr->sample_rate = AV_RL16(buf + 12);
80  hdr->unk2 = AV_RL16(buf + 14);
81  hdr->flags = AV_RL32(buf + 16);
82 }
83 
85  const ArgoASFChunkHeader *ckhdr)
86 {
87  if (ckhdr->num_samples != ASF_SAMPLE_COUNT) {
88  av_log(s, AV_LOG_ERROR, "Invalid sample count. Got %u, expected %d\n",
90  return AVERROR_INVALIDDATA;
91  }
92 
93  if ((ckhdr->flags & ASF_CF_ALWAYS1) != ASF_CF_ALWAYS1 || (ckhdr->flags & ASF_CF_ALWAYS0) != 0) {
94  avpriv_request_sample(s, "Nonstandard flags (0x%08X)", ckhdr->flags);
95  return AVERROR_PATCHWELCOME;
96  }
97 
101 
102  if (ckhdr->flags & ASF_CF_STEREO) {
104  } else {
106  }
107 
108  /* v1.1 files (FX Fighter) are all marked as 44100, but are actually 22050. */
109  if (fhdr->version_major == 1 && fhdr->version_minor == 1)
110  st->codecpar->sample_rate = 22050;
111  else
112  st->codecpar->sample_rate = ckhdr->sample_rate;
113 
115 
116  if (!(ckhdr->flags & ASF_CF_BITS_PER_SAMPLE)) {
117  /* The header allows for these, but I've never seen any files with them. */
118  avpriv_request_sample(s, "Non 16-bit samples");
119  return AVERROR_PATCHWELCOME;
120  }
121 
122  /*
123  * (nchannel control bytes) + ((bytes_per_channel) * nchannel)
124  * For mono, this is 17. For stereo, this is 34.
125  */
127  (ckhdr->num_samples / 2) *
129 
131  st->codecpar->sample_rate *
133 
134  avpriv_set_pts_info(st, 64, 1, st->codecpar->sample_rate);
135  st->start_time = 0;
136 
137  if (fhdr->num_chunks == 1) {
138  st->duration = ckhdr->num_blocks * ckhdr->num_samples;
139  st->nb_frames = ckhdr->num_blocks;
140  }
141 
142  return 0;
143 }
144 
145 #if CONFIG_ARGO_ASF_DEMUXER
146 /*
147  * Known versions:
148  * 1.1: https://samples.ffmpeg.org/game-formats/brender/part2.zip
149  * FX Fighter
150  * 1.2: Croc! Legend of the Gobbos
151  * 2.1: Croc 2
152  * The Emperor's New Groove
153  * Disney's Aladdin in Nasira's Revenge
154  */
155 static int argo_asf_is_known_version(const ArgoASFFileHeader *hdr)
156 {
157  return (hdr->version_major == 1 && hdr->version_minor == 1) ||
158  (hdr->version_major == 1 && hdr->version_minor == 2) ||
159  (hdr->version_major == 2 && hdr->version_minor == 1);
160 }
161 
162 static int argo_asf_probe(const AVProbeData *p)
163 {
164  ArgoASFFileHeader hdr;
165 
167 
169 
170  if (hdr.magic != ASF_TAG)
171  return 0;
172 
173  if (!argo_asf_is_known_version(&hdr))
174  return AVPROBE_SCORE_EXTENSION / 2;
175 
176  return AVPROBE_SCORE_EXTENSION + 1;
177 }
178 
179 static int argo_asf_read_header(AVFormatContext *s)
180 {
181  int64_t ret;
182  AVIOContext *pb = s->pb;
183  AVStream *st;
184  ArgoASFDemuxContext *asf = s->priv_data;
185  uint8_t buf[ASF_MIN_BUFFER_SIZE];
186 
187  if (!(st = avformat_new_stream(s, NULL)))
188  return AVERROR(ENOMEM);
189 
190  if ((ret = avio_read(pb, buf, ASF_FILE_HEADER_SIZE)) < 0)
191  return ret;
192  else if (ret != ASF_FILE_HEADER_SIZE)
193  return AVERROR(EIO);
194 
196 
197  if ((ret = ff_argo_asf_validate_file_header(s, &asf->fhdr)) < 0)
198  return ret;
199 
200  /* This should only be 1 in ASF files. >1 is fine if in BRP. */
201  if (asf->fhdr.num_chunks != 1)
202  return AVERROR_INVALIDDATA;
203 
204  if ((ret = avio_skip(pb, asf->fhdr.chunk_offset - ASF_FILE_HEADER_SIZE)) < 0)
205  return ret;
206 
207  if ((ret = avio_read(pb, buf, ASF_CHUNK_HEADER_SIZE)) < 0)
208  return ret;
209  else if (ret != ASF_CHUNK_HEADER_SIZE)
210  return AVERROR(EIO);
211 
213 
214  av_dict_set(&s->metadata, "title", asf->fhdr.name, 0);
215 
216  return ff_argo_asf_fill_stream(s, st, &asf->fhdr, &asf->ckhdr);
217 }
218 
219 static int argo_asf_read_packet(AVFormatContext *s, AVPacket *pkt)
220 {
221  ArgoASFDemuxContext *asf = s->priv_data;
222 
223  AVStream *st = s->streams[0];
224  AVIOContext *pb = s->pb;
225  int ret;
226 
227  if (asf->blocks_read >= asf->ckhdr.num_blocks)
228  return AVERROR_EOF;
229 
232  if (ret < 0)
233  return ret;
234 
235  /* Something real screwy is going on. */
236  if (ret % st->codecpar->block_align != 0)
237  return AVERROR_INVALIDDATA;
238 
239 
240  pkt->stream_index = st->index;
241  pkt->duration = asf->ckhdr.num_samples * (ret / st->codecpar->block_align);
242  pkt->pts = asf->blocks_read * asf->ckhdr.num_samples;
243  asf->blocks_read += (ret / st->codecpar->block_align);
244 
246  return 0;
247 }
248 
249 static int argo_asf_seek(AVFormatContext *s, int stream_index,
250  int64_t pts, int flags)
251 {
252  ArgoASFDemuxContext *asf = s->priv_data;
253  AVStream *st = s->streams[stream_index];
254  int64_t offset;
255  uint32_t block = pts / asf->ckhdr.num_samples;
256 
257  if (block >= asf->ckhdr.num_blocks)
258  return -1;
259 
261  (block * st->codecpar->block_align);
262 
263  if ((offset = avio_seek(s->pb, offset, SEEK_SET)) < 0)
264  return offset;
265 
266  asf->blocks_read = block;
267  return 0;
268 }
269 
270 /*
271  * Not actually sure what ASF stands for.
272  * - Argonaut Sound File?
273  * - Audio Stream File?
274  */
276  .name = "argo_asf",
277  .long_name = NULL_IF_CONFIG_SMALL("Argonaut Games ASF"),
278  .priv_data_size = sizeof(ArgoASFDemuxContext),
279  .read_probe = argo_asf_probe,
280  .read_header = argo_asf_read_header,
281  .read_packet = argo_asf_read_packet,
282  .read_seek = argo_asf_seek,
283 };
284 #endif
285 
286 #if CONFIG_ARGO_ASF_MUXER
287 static int argo_asf_write_init(AVFormatContext *s)
288 {
289  ArgoASFMuxContext *ctx = s->priv_data;
290  const AVCodecParameters *par;
291 
292  if (s->nb_streams != 1) {
293  av_log(s, AV_LOG_ERROR, "ASF files have exactly one stream\n");
294  return AVERROR(EINVAL);
295  }
296 
297  par = s->streams[0]->codecpar;
298 
299  if (par->codec_id != AV_CODEC_ID_ADPCM_ARGO) {
300  av_log(s, AV_LOG_ERROR, "%s codec not supported\n",
301  avcodec_get_name(par->codec_id));
302  return AVERROR(EINVAL);
303  }
304 
305  if (ctx->version_major == 1 && ctx->version_minor == 1 && par->sample_rate != 22050) {
306  av_log(s, AV_LOG_ERROR, "ASF v1.1 files only support a sample rate of 22050\n");
307  return AVERROR(EINVAL);
308  }
309 
310  if (par->ch_layout.nb_channels > 2) {
311  av_log(s, AV_LOG_ERROR, "ASF files only support up to 2 channels\n");
312  return AVERROR(EINVAL);
313  }
314 
315  if (par->block_align != 17 * par->ch_layout.nb_channels)
316  return AVERROR(EINVAL);
317 
318  if (par->sample_rate > UINT16_MAX) {
319  av_log(s, AV_LOG_ERROR, "Sample rate too large\n");
320  return AVERROR(EINVAL);
321  }
322 
323  if (!(s->pb->seekable & AVIO_SEEKABLE_NORMAL)) {
324  av_log(s, AV_LOG_ERROR, "Stream not seekable, unable to write output file\n");
325  return AVERROR(EINVAL);
326  }
327 
328  return 0;
329 }
330 
331 static void argo_asf_write_file_header(const ArgoASFFileHeader *fhdr, AVIOContext *pb)
332 {
333  avio_wl32( pb, fhdr->magic);
334  avio_wl16( pb, fhdr->version_major);
335  avio_wl16( pb, fhdr->version_minor);
336  avio_wl32( pb, fhdr->num_chunks);
337  avio_wl32( pb, fhdr->chunk_offset);
338  avio_write(pb, fhdr->name, ASF_NAME_SIZE);
339 }
340 
341 static void argo_asf_write_chunk_header(const ArgoASFChunkHeader *ckhdr, AVIOContext *pb)
342 {
343  avio_wl32(pb, ckhdr->num_blocks);
344  avio_wl32(pb, ckhdr->num_samples);
345  avio_wl32(pb, ckhdr->unk1);
346  avio_wl16(pb, ckhdr->sample_rate);
347  avio_wl16(pb, ckhdr->unk2);
348  avio_wl32(pb, ckhdr->flags);
349 }
350 
351 static int argo_asf_write_header(AVFormatContext *s)
352 {
353  const AVCodecParameters *par = s->streams[0]->codecpar;
354  ArgoASFMuxContext *ctx = s->priv_data;
355  ArgoASFChunkHeader chdr;
356  ArgoASFFileHeader fhdr = {
357  .magic = ASF_TAG,
358  .version_major = (uint16_t)ctx->version_major,
359  .version_minor = (uint16_t)ctx->version_minor,
360  .num_chunks = 1,
361  .chunk_offset = ASF_FILE_HEADER_SIZE
362  };
364  const char *name, *end;
365  size_t len;
366 
367  /*
368  * If the user specified a name, use it as is. Otherwise,
369  * try to use metadata (if present), then fall back to the
370  * filename (minus extension).
371  */
372  if (ctx->name) {
373  name = ctx->name;
374  len = strlen(ctx->name);
375  } else if ((t = av_dict_get(s->metadata, "title", NULL, 0))) {
376  name = t->value;
377  len = strlen(t->value);
378  } else if (!(end = strrchr((name = av_basename(s->url)), '.'))) {
379  len = strlen(name);
380  } else {
381  len = end - name;
382  }
383  memcpy(fhdr.name, name, FFMIN(len, ASF_NAME_SIZE));
384 
385  chdr.num_blocks = 0;
387  chdr.unk1 = 0;
388 
389  if (ctx->version_major == 1 && ctx->version_minor == 1)
390  chdr.sample_rate = 44100;
391  else
392  chdr.sample_rate = par->sample_rate;
393 
394  chdr.unk2 = ~0;
396 
397  if (par->ch_layout.nb_channels == 2)
398  chdr.flags |= ASF_CF_STEREO;
399 
400  argo_asf_write_file_header(&fhdr, s->pb);
401  argo_asf_write_chunk_header(&chdr, s->pb);
402  return 0;
403 }
404 
405 static int argo_asf_write_packet(AVFormatContext *s, AVPacket *pkt)
406 {
407  ArgoASFMuxContext *ctx = s->priv_data;
408  AVCodecParameters *par = s->streams[0]->codecpar;
409  int nb_blocks = pkt->size / par->block_align;
410 
411  if (pkt->size % par->block_align != 0)
412  return AVERROR_INVALIDDATA;
413 
414  if (ctx->nb_blocks + nb_blocks > UINT32_MAX)
415  return AVERROR_INVALIDDATA;
416 
417  avio_write(s->pb, pkt->data, pkt->size);
418 
419  ctx->nb_blocks += nb_blocks;
420  return 0;
421 }
422 
423 static int argo_asf_write_trailer(AVFormatContext *s)
424 {
425  ArgoASFMuxContext *ctx = s->priv_data;
426  int64_t ret;
427 
428  if ((ret = avio_seek(s->pb, ASF_FILE_HEADER_SIZE, SEEK_SET)) < 0)
429  return ret;
430 
431  avio_wl32(s->pb, (uint32_t)ctx->nb_blocks);
432  return 0;
433 }
434 
435 static const AVOption argo_asf_options[] = {
436  {
437  .name = "version_major",
438  .help = "override file major version",
439  .offset = offsetof(ArgoASFMuxContext, version_major),
440  .type = AV_OPT_TYPE_INT,
441  .default_val = {.i64 = 2},
442  .min = 0,
443  .max = UINT16_MAX,
445  },
446  {
447  .name = "version_minor",
448  .help = "override file minor version",
449  .offset = offsetof(ArgoASFMuxContext, version_minor),
450  .type = AV_OPT_TYPE_INT,
451  .default_val = {.i64 = 1},
452  .min = 0,
453  .max = UINT16_MAX,
455  },
456  {
457  .name = "name",
458  .help = "embedded file name (max 8 characters)",
459  .offset = offsetof(ArgoASFMuxContext, name),
460  .type = AV_OPT_TYPE_STRING,
461  .default_val = {.str = NULL},
463  },
464  { NULL }
465 };
466 
467 static const AVClass argo_asf_muxer_class = {
468  .class_name = "argo_asf_muxer",
469  .item_name = av_default_item_name,
470  .option = argo_asf_options,
471  .version = LIBAVUTIL_VERSION_INT
472 };
473 
475  .p.name = "argo_asf",
476  .p.long_name = NULL_IF_CONFIG_SMALL("Argonaut Games ASF"),
477  /*
478  * NB: Can't do this as it conflicts with the actual ASF format.
479  * .p.extensions = "asf",
480  */
481  .p.audio_codec = AV_CODEC_ID_ADPCM_ARGO,
482  .p.video_codec = AV_CODEC_ID_NONE,
483  .p.priv_class = &argo_asf_muxer_class,
484  .init = argo_asf_write_init,
485  .write_header = argo_asf_write_header,
486  .write_packet = argo_asf_write_packet,
487  .write_trailer = argo_asf_write_trailer,
488  .priv_data_size = sizeof(ArgoASFMuxContext)
489 };
490 #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:511
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
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:51
AV_CHANNEL_LAYOUT_STEREO
#define AV_CHANNEL_LAYOUT_STEREO
Definition: channel_layout.h:389
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:47
avformat_new_stream
AVStream * avformat_new_stream(AVFormatContext *s, const struct AVCodec *c)
Add a new stream to a media file.
AVERROR_EOF
#define AVERROR_EOF
End of file.
Definition: error.h:57
AVPacket::data
uint8_t * data
Definition: packet.h:522
AVOption
AVOption.
Definition: opt.h:251
AVPacket::duration
int64_t duration
Duration of this packet in AVStream->time_base units, 0 if unknown.
Definition: packet.h:540
ArgoASFDemuxContext::fhdr
ArgoASFFileHeader fhdr
Definition: argo_asf.c:39
AVChannelLayout::nb_channels
int nb_channels
Number of channels in this layout.
Definition: channel_layout.h:323
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:84
av_basename
const char * av_basename(const char *path)
Thread safe basename.
Definition: avstring.c:252
FFOutputFormat::p
AVOutputFormat p
The public AVOutputFormat.
Definition: mux.h:36
ASF_CF_ALWAYS0
@ ASF_CF_ALWAYS0
Definition: argo_asf.h:63
ASF_NB_BLOCKS
#define ASF_NB_BLOCKS
Definition: argo_asf.c:36
ASF_CF_ALWAYS1
@ ASF_CF_ALWAYS1
Definition: argo_asf.h:62
avio_wl16
void avio_wl16(AVIOContext *s, unsigned int val)
Definition: aviobuf.c:484
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:830
ArgoASFMuxContext::version_minor
int version_minor
Definition: argo_asf.c:47
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
ff_argo_asf_muxer
const FFOutputFormat ff_argo_asf_muxer
AVPROBE_PADDING_SIZE
#define AVPROBE_PADDING_SIZE
extra allocated bytes at the end of the probe buffer
Definition: avformat.h:466
pts
static int64_t pts
Definition: transcode_aac.c:643
ArgoASFMuxContext::nb_blocks
int64_t nb_blocks
Definition: argo_asf.c:49
AVStream::duration
int64_t duration
Decoding: duration of the stream, in stream time base.
Definition: avformat.h:900
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:549
AV_PKT_FLAG_CORRUPT
#define AV_PKT_FLAG_CORRUPT
The packet content is corrupted.
Definition: packet.h:578
read_packet
static int read_packet(void *opaque, uint8_t *buf, int buf_size)
Definition: avio_read_callback.c:41
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:62
intreadwrite.h
ArgoASFMuxContext::name
const char * name
Definition: argo_asf.c:48
s
#define s(width, name)
Definition: cbs_vp9.c:198
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:554
AVProbeData::buf
unsigned char * buf
Buffer must have AVPROBE_PADDING_SIZE of extra allocated bytes filled with zero.
Definition: avformat.h:454
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:40
ctx
AVFormatContext * ctx
Definition: movenc.c:48
ArgoASFDemuxContext
Definition: argo_asf.c:38
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:41
AVFormatContext
Format I/O context.
Definition: avformat.h:1202
internal.h
AVStream::codecpar
AVCodecParameters * codecpar
Codec parameters associated with this stream.
Definition: avformat.h:864
LIBAVUTIL_VERSION_INT
#define LIBAVUTIL_VERSION_INT
Definition: version.h:85
read_header
static int read_header(FFV1Context *f)
Definition: ffv1dec.c:550
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:40
AV_CODEC_ID_ADPCM_ARGO
@ AV_CODEC_ID_ADPCM_ARGO
Definition: codec_id.h:412
ff_argo_asf_validate_file_header
int ff_argo_asf_validate_file_header(AVFormatContext *s, const ArgoASFFileHeader *hdr)
Definition: argo_asf.c:63
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:452
argo_asf.h
FFOutputFormat
Definition: mux.h:32
AVCodecParameters::ch_layout
AVChannelLayout ch_layout
Audio only.
Definition: codec_par.h:206
AVPROBE_SCORE_EXTENSION
#define AVPROBE_SCORE_EXTENSION
score for file extension
Definition: avformat.h:462
AVCodecParameters::sample_rate
int sample_rate
Audio only.
Definition: codec_par.h:171
AVStream::nb_frames
int64_t nb_frames
number of frames in this stream if known or 0
Definition: avformat.h:902
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:166
AVPacket::size
int size
Definition: packet.h:523
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:106
AVChannelLayout
An AVChannelLayout holds information about the channel layout of audio data.
Definition: channel_layout.h:313
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:248
avio_wl32
void avio_wl32(AVIOContext *s, unsigned int val)
Definition: aviobuf.c:404
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:528
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:417
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
AVPacket::pts
int64_t pts
Presentation timestamp in AVStream->time_base units; the time at which the decompressed packet will b...
Definition: packet.h:515
AVCodecParameters::block_align
int block_align
Audio only.
Definition: codec_par.h:178
ff_argo_asf_parse_chunk_header
void ff_argo_asf_parse_chunk_header(ArgoASFChunkHeader *hdr, const uint8_t *buf)
Definition: argo_asf.c:74
FFMIN
#define FFMIN(a, b)
Definition: macros.h:49
len
int len
Definition: vorbis_enc_data.h:426
ASF_CF_STEREO
@ ASF_CF_STEREO
Definition: argo_asf.h:58
ArgoASFMuxContext
Definition: argo_asf.c:44
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:103
ret
ret
Definition: filter_design.txt:187
AVStream
Stream structure.
Definition: avformat.h:841
avio_seek
int64_t avio_seek(AVIOContext *s, int64_t offset, int whence)
fseek() equivalent for AVIOContext.
Definition: aviobuf.c:278
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:847
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:659
AVPacket::stream_index
int stream_index
Definition: packet.h:524
avio_skip
int64_t avio_skip(AVIOContext *s, int64_t offset)
Skip given number of bytes forward.
Definition: aviobuf.c:365
ASF_MIN_BUFFER_SIZE
#define ASF_MIN_BUFFER_SIZE
Definition: argo_asf.h:35
read_probe
static int read_probe(const AVProbeData *p)
Definition: cdg.c:29
AVCodecParameters::bits_per_coded_sample
int bits_per_coded_sample
The number of bits per sample in the codedwords.
Definition: codec_par.h:97
ff_argo_asf_parse_file_header
void ff_argo_asf_parse_file_header(ArgoASFFileHeader *hdr, const uint8_t *buf)
Definition: argo_asf.c:52
avpriv_request_sample
#define avpriv_request_sample(...)
Definition: tableprint_vlc.h:36
AVCodecParameters::format
int format
Definition: codec_par.h:79
ASF_TAG
#define ASF_TAG
Definition: argo_asf.h:31
AV_CHANNEL_LAYOUT_MONO
#define AV_CHANNEL_LAYOUT_MONO
Definition: channel_layout.h:388
ASF_CF_BITS_PER_SAMPLE
@ ASF_CF_BITS_PER_SAMPLE
Definition: argo_asf.h:57
AVDictionaryEntry
Definition: dict.h:89
AVCodecParameters::codec_id
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
Definition: codec_par.h:55
AVPacket
This structure stores compressed data.
Definition: packet.h:499
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:88
ArgoASFMuxContext::version_major
int version_major
Definition: argo_asf.c:46
flags
#define flags(name, subs,...)
Definition: cbs_av1.c:474
AVCodecParameters::bit_rate
int64_t bit_rate
The average bitrate of the encoded data (in bits per second).
Definition: codec_par.h:84
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:91
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:890
avstring.h
AV_OPT_TYPE_STRING
@ AV_OPT_TYPE_STRING
Definition: opt.h:229
ArgoASFFileHeader::magic
uint32_t magic
Definition: argo_asf.h:39
mux.h