FFmpeg: libavformat/scd.c Source File

FFmpeg
scd.c
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1 /*
2  * Square Enix SCD demuxer
3  * Copyright (C) 2021 Zane van Iperen (zane@zanevaniperen.com)
4  *
5  * Based off documentation:
6  * http://ffxivexplorer.fragmenterworks.com/research/scd%20files.txt
7  *
8  * This file is part of FFmpeg.
9  *
10  * FFmpeg is free software; you can redistribute it and/or
11  * modify it under the terms of the GNU Lesser General Public
12  * License as published by the Free Software Foundation; either
13  * version 2.1 of the License, or (at your option) any later version.
14  *
15  * FFmpeg is distributed in the hope that it will be useful,
16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18  * Lesser General Public License for more details.
19  *
20  * You should have received a copy of the GNU Lesser General Public
21  * License along with FFmpeg; if not, write to the Free Software
22  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
23  */
24 #include "libavutil/avstring.h"
25 #include "libavutil/intreadwrite.h"
26 #include "libavutil/internal.h"
27 #include "libavutil/macros.h"
28 #include "libavutil/avassert.h"
29 #include "libavformat/internal.h"
30 #include "avformat.h"
31 
32  #define SCD_MAGIC ((uint64_t)MKBETAG('S', 'E', 'D', 'B') << 32 | \
33  MKBETAG('S', 'S', 'C', 'F'))
34  #define SCD_MIN_HEADER_SIZE 20
35  #define SCD_OFFSET_HEADER_SIZE 28
36  #define SCD_TRACK_HEADER_SIZE 32
37 
38  #define SCD_TRACK_ID_PCM 0
39  #define SCD_TRACK_ID_OGG 6
40  #define SCD_TRACK_ID_MP3 7
41  #define SCD_TRACK_ID_MS_ADPCM 12
42 
43  typedef struct SCDOffsetTable {
44   uint16_t count;
45   uint32_t offset;
46   uint32_t *entries;
47 } SCDOffsetTable;
48 
49  typedef struct SCDHeader {
50   uint64_t magic; /* SEDBSSCF */
51   uint32_t version; /* Verison number. We only know about 3. */
52   uint16_t unk1; /* Unknown, 260 in Drakengard 3, 1024 in FFXIV. */
53   uint16_t header_size; /* Total size of this header. */
54   uint32_t file_size; /* Is often 0, just ignore it. */
55 
56   SCDOffsetTable table0; /* Table 0, no idea. 56 uint32's/entry. */
57   SCDOffsetTable table1; /* Table 1, contains the track info. */
58   SCDOffsetTable table2; /* Table 2, no idea. 40 uint32's/entry. */
59   uint16_t unk2; /* Unknown, not a count. */
60   uint32_t unk3; /* Unknown, not an offset. */
61   uint32_t unk4; /* Unknown, offset to offset. */
62 } SCDHeader;
63 
64  typedef struct SCDTrackHeader {
65   uint32_t length;
66   uint32_t num_channels;
67   uint32_t sample_rate;
68   uint32_t data_type;
69   uint32_t loop_start;
70   uint32_t loop_end;
71   uint32_t data_offset; /* Offset to data + this header. */
72   uint32_t aux_count;
73 
74   uint32_t absolute_offset;
75   uint32_t bytes_read;
76 } SCDTrackHeader;
77 
78  typedef struct SCDDemuxContext {
79   SCDHeader hdr;
80   SCDTrackHeader *tracks;
81   int current_track;
82 } SCDDemuxContext;
83 
84  static int scd_probe(const AVProbeData *p)
85 {
86  if (AV_RB64(p->buf) != SCD_MAGIC)
87  return 0;
88 
89  return AVPROBE_SCORE_MAX;
90 }
91 
92  static int scd_read_table(AVFormatContext *s, SCDOffsetTable *table)
93 {
94  int64_t ret;
95 
96  if ((ret = avio_seek(s->pb, table->offset, SEEK_SET)) < 0)
97  return ret;
98 
99  if ((table->entries = av_calloc(table->count, sizeof(uint32_t))) == NULL)
100  return ret;
101 
102  if ((ret = avio_read(s->pb, (unsigned char*)table->entries, table->count * sizeof(uint32_t))) < 0)
103  return ret;
104 
105  for (size_t i = 0; i < table->count; i++)
106  table->entries[i] = AV_RB32(table->entries + i);
107 
108  av_log(s, AV_LOG_TRACE, "Table, size = %u, offset = %u\n", table->count, table->offset);
109  for (size_t i = 0; i < table->count; i++)
110  av_log(s, AV_LOG_TRACE, " [%02zu]: %u\n", i, table->entries[i]);
111 
112  return 0;
113 }
114 
115  static int scd_read_offsets(AVFormatContext *s)
116 {
117  int64_t ret;
118  SCDDemuxContext *ctx = s->priv_data;
119  uint8_t buf[SCD_OFFSET_HEADER_SIZE];
120 
121  if ((ret = avio_read(s->pb, buf, SCD_OFFSET_HEADER_SIZE)) < 0)
122  return ret;
123 
124  ctx->hdr.table0.count = AV_RB16(buf + 0);
125  ctx->hdr.table1.count = AV_RB16(buf + 2);
126  ctx->hdr.table2.count = AV_RB16(buf + 4);
127  ctx->hdr.unk2 = AV_RB16(buf + 6);
128  ctx->hdr.table0.offset = AV_RB32(buf + 8);
129  ctx->hdr.table1.offset = AV_RB32(buf + 12);
130  ctx->hdr.table2.offset = AV_RB32(buf + 16);
131  ctx->hdr.unk3 = AV_RB32(buf + 20);
132  ctx->hdr.unk4 = AV_RB32(buf + 24);
133 
134  if ((ret = scd_read_table(s, &ctx->hdr.table0)) < 0)
135  return ret;
136 
137  if ((ret = scd_read_table(s, &ctx->hdr.table1)) < 0)
138  return ret;
139 
140  if ((ret = scd_read_table(s, &ctx->hdr.table2)) < 0)
141  return ret;
142 
143  return 0;
144 }
145 
146  static int scd_read_track(AVFormatContext *s, SCDTrackHeader *track, int index)
147 {
148  int64_t ret;
149  uint32_t hoffset;
150  AVStream *st;
151  AVCodecParameters *par;
152  SCDDemuxContext *ctx = s->priv_data;
153  uint8_t buf[SCD_TRACK_HEADER_SIZE];
154 
155  /* Mark as experimental until I find more files from more than just one game. */
156  if (s->strict_std_compliance > FF_COMPLIANCE_EXPERIMENTAL) {
157  av_log(s, AV_LOG_ERROR, "SCD demuxing is experimental, "
158  "add '-strict %d' if you want to use it.\n",
159  FF_COMPLIANCE_EXPERIMENTAL);
160  return AVERROR_EXPERIMENTAL;
161  }
162 
163  hoffset = ctx->hdr.table1.entries[index];
164 
165  if ((ret = avio_seek(s->pb, hoffset, SEEK_SET)) < 0)
166  return ret;
167 
168  if ((ret = avio_read(s->pb, buf, SCD_TRACK_HEADER_SIZE)) < 0)
169  return ret;
170 
171  track->length = AV_RB32(buf + 0);
172  track->num_channels = AV_RB32(buf + 4);
173  track->sample_rate = AV_RB32(buf + 8);
174  track->data_type = AV_RB32(buf + 12);
175  track->loop_start = AV_RB32(buf + 16);
176  track->loop_end = AV_RB32(buf + 20);
177  track->data_offset = AV_RB32(buf + 24);
178  track->aux_count = AV_RB32(buf + 28);
179 
180  /* Sanity checks */
181  if (track->num_channels > 8 || track->sample_rate >= 192000 ||
182  track->loop_start > track->loop_end)
183  return AVERROR_INVALIDDATA;
184 
185  track->absolute_offset = hoffset + SCD_TRACK_HEADER_SIZE + track->data_offset;
186  track->bytes_read = 0;
187 
188  /* Not sure what to do with these, it seems to be fine to ignore them. */
189  if (track->aux_count != 0)
190  av_log(s, AV_LOG_DEBUG, "[%d] Track has %u auxillary chunk(s).\n", index, track->aux_count);
191 
192  if ((st = avformat_new_stream(s, NULL)) == NULL)
193  return AVERROR(ENOMEM);
194 
195  par = st->codecpar;
196  par->codec_type = AVMEDIA_TYPE_AUDIO;
197  par->ch_layout.nb_channels = (int)track->num_channels;
198  par->sample_rate = (int)track->sample_rate;
199  st->index = index;
200  st->start_time = 0;
201 
202  /* TODO: Check this with other types. Drakengard 3 MP3s have 47999 instead of 48000. */
203  if (track->data_type == SCD_TRACK_ID_MP3)
204  par->sample_rate += 1;
205 
206  avpriv_set_pts_info(st, 64, 1, par->sample_rate);
207 
208  if (av_dict_set_int(&st->metadata, "start", track->absolute_offset, 0) < 0)
209  return AVERROR(ENOMEM);
210 
211  if (av_dict_set_int(&st->metadata, "loop_start", track->loop_start, 0) < 0)
212  return AVERROR(ENOMEM);
213 
214  if (av_dict_set_int(&st->metadata, "loop_end", track->loop_end, 0) < 0)
215  return AVERROR(ENOMEM);
216 
217  switch(track->data_type) {
218  case SCD_TRACK_ID_PCM:
219  par->codec_id = AV_CODEC_ID_PCM_S16BE;
220  par->bits_per_coded_sample = 16;
221  par->block_align = par->bits_per_coded_sample * par->ch_layout.nb_channels / 8;
222  break;
223  case SCD_TRACK_ID_MP3:
224  par->codec_id = AV_CODEC_ID_MP3;
225  ffstream(st)->need_parsing = AVSTREAM_PARSE_FULL_RAW;
226  break;
227  case SCD_TRACK_ID_OGG:
228  case SCD_TRACK_ID_MS_ADPCM:
229  default:
230  par->codec_id = AV_CODEC_ID_NONE;
231  avpriv_request_sample(s, "data type %u", track->data_type);
232  }
233 
234  return 0;
235 }
236 
237  static int scd_read_header(AVFormatContext *s)
238 {
239  int64_t ret;
240  SCDDemuxContext *ctx = s->priv_data;
241  uint8_t buf[SCD_MIN_HEADER_SIZE];
242 
243  if ((ret = avio_read(s->pb, buf, SCD_MIN_HEADER_SIZE)) < 0)
244  return ret;
245 
246  ctx->hdr.magic = AV_RB64(buf + 0);
247  ctx->hdr.version = AV_RB32(buf + 8);
248  ctx->hdr.unk1 = AV_RB16(buf + 12);
249  ctx->hdr.header_size = AV_RB16(buf + 14);
250  ctx->hdr.file_size = AV_RB32(buf + 16);
251 
252  if (ctx->hdr.magic != SCD_MAGIC)
253  return AVERROR_INVALIDDATA;
254 
255  if (ctx->hdr.version != 3) {
256  avpriv_request_sample(s, "SCD version %u", ctx->hdr.version);
257  return AVERROR_PATCHWELCOME;
258  }
259 
260  if (ctx->hdr.header_size < SCD_MIN_HEADER_SIZE)
261  return AVERROR_INVALIDDATA;
262 
263  if ((ret = avio_skip(s->pb, ctx->hdr.header_size - SCD_MIN_HEADER_SIZE)) < 0)
264  return ret;
265 
266  if ((ret = scd_read_offsets(s)) < 0)
267  return ret;
268 
269  ctx->tracks = av_calloc(ctx->hdr.table1.count, sizeof(SCDTrackHeader));
270  if (ctx->tracks == NULL)
271  return AVERROR(ENOMEM);
272 
273  for (int i = 0; i < ctx->hdr.table1.count; i++) {
274  if ((ret = scd_read_track(s, ctx->tracks + i, i)) < 0)
275  return ret;
276  }
277 
278  if (ctx->hdr.table1.count == 0)
279  return 0;
280 
281  if ((ret = avio_seek(s->pb, ctx->tracks[0].absolute_offset, SEEK_SET)) < 0)
282  return ret;
283 
284  return 0;
285 }
286 
287  static int scd_read_packet(AVFormatContext *s, AVPacket *pkt)
288 {
289  SCDDemuxContext *ctx = s->priv_data;
290  AVCodecParameters *par;
291 
292  /* Streams aren't interleaved, round-robin them. */
293  for (int i = 0; i < ctx->hdr.table1.count; i++) {
294  int64_t ret;
295  int size;
296  SCDTrackHeader *trk;
297 
298  ctx->current_track %= ctx->hdr.table1.count;
299 
300  trk = ctx->tracks + ctx->current_track;
301  par = s->streams[ctx->current_track]->codecpar;
302 
303  if (trk->bytes_read >= trk->length)
304  continue;
305 
306  if ((ret = avio_seek(s->pb, trk->absolute_offset + trk->bytes_read, SEEK_SET)) < 0)
307  return ret;
308 
309  switch(trk->data_type) {
310  case SCD_TRACK_ID_PCM:
311  size = par->block_align;
312  break;
313  case SCD_TRACK_ID_MP3:
314  default:
315  size = FFMIN(trk->length - trk->bytes_read, 4096);
316  break;
317  }
318 
319  ret = av_get_packet(s->pb, pkt, size);
320  if (ret == AVERROR_EOF) {
321  trk->length = trk->bytes_read;
322  continue;
323  } else if (ret < 0) {
324  return ret;
325  }
326 
327  if (trk->data_type == SCD_TRACK_ID_PCM) {
328  pkt->pts = trk->bytes_read / (par->ch_layout.nb_channels * sizeof(uint16_t));
329  pkt->duration = size / (par->ch_layout.nb_channels * sizeof(int16_t));
330  }
331 
332  trk->bytes_read += ret;
333  pkt->flags &= ~AV_PKT_FLAG_CORRUPT;
334  pkt->stream_index = ctx->current_track;
335 
336  ctx->current_track++;
337  return 0;
338  }
339 
340  return AVERROR_EOF;
341 }
342 
343  static int scd_seek(AVFormatContext *s, int stream_index,
344  int64_t pts, int flags)
345 {
346  SCDDemuxContext *ctx = s->priv_data;
347 
348  if (pts != 0)
349  return AVERROR(EINVAL);
350 
351  for(int i = 0; i < ctx->hdr.table1.count; ++i)
352  ctx->tracks[i].bytes_read = 0;
353 
354  return 0;
355 }
356 
357  static int scd_read_close(AVFormatContext *s)
358 {
359  SCDDemuxContext *ctx = s->priv_data;
360 
361  av_freep(&ctx->hdr.table0.entries);
362  av_freep(&ctx->hdr.table1.entries);
363  av_freep(&ctx->hdr.table2.entries);
364  av_freep(&ctx->tracks);
365  return 0;
366 }
367 
368  const AVInputFormat ff_scd_demuxer = {
369  .name = "scd",
370  .long_name = NULL_IF_CONFIG_SMALL("Square Enix SCD"),
371  .priv_data_size = sizeof(SCDDemuxContext),
372  .flags_internal = FF_FMT_INIT_CLEANUP,
373  .read_probe = scd_probe,
374  .read_header = scd_read_header,
375  .read_packet = scd_read_packet,
376  .read_seek = scd_seek,
377  .read_close = scd_read_close,
378 };
SCDDemuxContext
Definition: scd.c:78
AVERROR_EXPERIMENTAL
#define AVERROR_EXPERIMENTAL
Requested feature is flagged experimental. Set strict_std_compliance if you really want to use it.
Definition: error.h:74
SCD_MAGIC
#define SCD_MAGIC
Definition: scd.c:32
FF_FMT_INIT_CLEANUP
#define FF_FMT_INIT_CLEANUP
For an AVInputFormat with this flag set read_close() needs to be called by the caller upon read_heade...
Definition: internal.h:47
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
avformat_new_stream
AVStream * avformat_new_stream(AVFormatContext *s, const AVCodec *c)
Add a new stream to a media file.
Definition: options.c:243
AVCodecParameters::codec_type
enum AVMediaType codec_type
General type of the encoded data.
Definition: codec_par.h:58
AVCodecParameters
This struct describes the properties of an encoded stream.
Definition: codec_par.h:54
AVERROR_EOF
#define AVERROR_EOF
End of file.
Definition: error.h:57
SCDHeader
Definition: scd.c:49
SCDHeader::table2
SCDOffsetTable table2
Definition: scd.c:58
table
static const uint16_t table[]
Definition: prosumer.c:205
SCD_TRACK_ID_MS_ADPCM
#define SCD_TRACK_ID_MS_ADPCM
Definition: scd.c:41
AVPacket::duration
int64_t duration
Duration of this packet in AVStream->time_base units, 0 if unknown.
Definition: packet.h:392
SCDTrackHeader::loop_end
uint32_t loop_end
Definition: scd.c:70
FF_COMPLIANCE_EXPERIMENTAL
#define FF_COMPLIANCE_EXPERIMENTAL
Allow nonstandardized experimental things.
Definition: defs.h:62
SCDHeader::unk2
uint16_t unk2
Definition: scd.c:59
SCDHeader::table1
SCDOffsetTable table1
Definition: scd.c:57
AVChannelLayout::nb_channels
int nb_channels
Number of channels in this layout.
Definition: channel_layout.h:311
SCDDemuxContext::hdr
SCDHeader hdr
Definition: scd.c:79
AVPROBE_SCORE_MAX
#define AVPROBE_SCORE_MAX
maximum score
Definition: avformat.h:463
SCDHeader::header_size
uint16_t header_size
Definition: scd.c:53
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:771
ffstream
static av_always_inline FFStream * ffstream(AVStream *st)
Definition: internal.h:413
AV_CODEC_ID_PCM_S16BE
@ AV_CODEC_ID_PCM_S16BE
Definition: codec_id.h:327
macros.h
read_seek
static int read_seek(AVFormatContext *ctx, int stream_index, int64_t timestamp, int flags)
Definition: libcdio.c:151
read_close
static av_cold int read_close(AVFormatContext *ctx)
Definition: libcdio.c:143
SCDTrackHeader
Definition: scd.c:64
pts
static int64_t pts
Definition: transcode_aac.c:653
AV_CODEC_ID_MP3
@ AV_CODEC_ID_MP3
preferred ID for decoding MPEG audio layer 1, 2 or 3
Definition: codec_id.h:439
SCDOffsetTable::count
uint16_t count
Definition: scd.c:44
SCDDemuxContext::tracks
SCDTrackHeader * tracks
Definition: scd.c:80
avassert.h
AV_LOG_TRACE
#define AV_LOG_TRACE
Extremely verbose debugging, useful for libav* development.
Definition: log.h:206
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
SCD_TRACK_ID_MP3
#define SCD_TRACK_ID_MP3
Definition: scd.c:40
AVInputFormat
Definition: avformat.h:546
AV_PKT_FLAG_CORRUPT
#define AV_PKT_FLAG_CORRUPT
The packet content is corrupted.
Definition: packet.h:430
read_packet
static int read_packet(void *opaque, uint8_t *buf, int buf_size)
Definition: avio_read_callback.c:41
intreadwrite.h
s
#define s(width, name)
Definition: cbs_vp9.c:256
AVInputFormat::name
const char * name
A comma separated list of short names for the format.
Definition: avformat.h:551
AVProbeData::buf
unsigned char * buf
Buffer must have AVPROBE_PADDING_SIZE of extra allocated bytes filled with zero.
Definition: avformat.h:453
AVMEDIA_TYPE_AUDIO
@ AVMEDIA_TYPE_AUDIO
Definition: avutil.h:202
SCDHeader::magic
uint64_t magic
Definition: scd.c:50
AV_LOG_DEBUG
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
Definition: log.h:201
ctx
AVFormatContext * ctx
Definition: movenc.c:48
SCDHeader::file_size
uint32_t file_size
Definition: scd.c:54
FFStream::need_parsing
enum AVStreamParseType need_parsing
Definition: internal.h:386
AVFormatContext
Format I/O context.
Definition: avformat.h:1104
internal.h
AVStream::codecpar
AVCodecParameters * codecpar
Codec parameters associated with this stream.
Definition: avformat.h:861
read_header
static int read_header(FFV1Context *f)
Definition: ffv1dec.c:545
NULL
#define NULL
Definition: coverity.c:32
AVERROR_PATCHWELCOME
#define AVERROR_PATCHWELCOME
Not yet implemented in FFmpeg, patches welcome.
Definition: error.h:64
SCD_MIN_HEADER_SIZE
#define SCD_MIN_HEADER_SIZE
Definition: scd.c:34
scd_read_close
static int scd_read_close(AVFormatContext *s)
Definition: scd.c:357
SCDHeader::unk3
uint32_t unk3
Definition: scd.c:60
SCDOffsetTable
Definition: scd.c:43
AVProbeData
This structure contains the data a format has to probe a file.
Definition: avformat.h:451
SCDTrackHeader::aux_count
uint32_t aux_count
Definition: scd.c:72
SCDHeader::table0
SCDOffsetTable table0
Definition: scd.c:56
AVStream::metadata
AVDictionary * metadata
Definition: avformat.h:918
SCDHeader::unk1
uint16_t unk1
Definition: scd.c:52
SCDHeader::unk4
uint32_t unk4
Definition: scd.c:61
AVCodecParameters::ch_layout
AVChannelLayout ch_layout
Audio only.
Definition: codec_par.h:213
index
int index
Definition: gxfenc.c:89
AVCodecParameters::sample_rate
int sample_rate
Audio only.
Definition: codec_par.h:178
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
SCDTrackHeader::absolute_offset
uint32_t absolute_offset
Definition: scd.c:74
SCDOffsetTable::offset
uint32_t offset
Definition: scd.c:45
size
int size
Definition: twinvq_data.h:10344
AV_RB32
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_WL32 unsigned int_TMPL AV_WL24 unsigned int_TMPL AV_WL16 uint64_t_TMPL AV_WB64 unsigned int_TMPL AV_RB32
Definition: bytestream.h:96
SCD_TRACK_ID_PCM
#define SCD_TRACK_ID_PCM
Definition: scd.c:38
SCDTrackHeader::num_channels
uint32_t num_channels
Definition: scd.c:66
SCDHeader::version
uint32_t version
Definition: scd.c:51
SCDTrackHeader::bytes_read
uint32_t bytes_read
Definition: scd.c:75
SCDTrackHeader::data_type
uint32_t data_type
Definition: scd.c:68
AVPacket::flags
int flags
A combination of AV_PKT_FLAG values.
Definition: packet.h:380
SCDTrackHeader::length
uint32_t length
Definition: scd.c:65
scd_read_offsets
static int scd_read_offsets(AVFormatContext *s)
Definition: scd.c:115
scd_read_table
static int scd_read_table(AVFormatContext *s, SCDOffsetTable *table)
Definition: scd.c:92
ff_scd_demuxer
const AVInputFormat ff_scd_demuxer
Definition: scd.c:368
AV_CODEC_ID_NONE
@ AV_CODEC_ID_NONE
Definition: codec_id.h:50
i
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:269
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
internal.h
AVCodecParameters::block_align
int block_align
Audio only.
Definition: codec_par.h:185
FFMIN
#define FFMIN(a, b)
Definition: macros.h:49
SCDTrackHeader::data_offset
uint32_t data_offset
Definition: scd.c:71
scd_read_header
static int scd_read_header(AVFormatContext *s)
Definition: scd.c:237
av_calloc
void * av_calloc(size_t nmemb, size_t size)
Definition: mem.c:262
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
SCDTrackHeader::sample_rate
uint32_t sample_rate
Definition: scd.c:67
ret
ret
Definition: filter_design.txt:187
AVStream
Stream structure.
Definition: avformat.h:838
avio_seek
int64_t avio_seek(AVIOContext *s, int64_t offset, int whence)
fseek() equivalent for AVIOContext.
Definition: aviobuf.c:252
SCDTrackHeader::loop_start
uint32_t loop_start
Definition: scd.c:69
avformat.h
SCDDemuxContext::current_track
int current_track
Definition: scd.c:81
AVStream::index
int index
stream index in AVFormatContext
Definition: avformat.h:844
avio_read
int avio_read(AVIOContext *s, unsigned char *buf, int size)
Read size bytes from AVIOContext into buf.
Definition: aviobuf.c:633
AVSTREAM_PARSE_FULL_RAW
@ AVSTREAM_PARSE_FULL_RAW
full parsing and repack with timestamp and position generation by parser for raw this assumes that ea...
Definition: avformat.h:692
SCDOffsetTable::entries
uint32_t * entries
Definition: scd.c:46
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:339
av_dict_set_int
int av_dict_set_int(AVDictionary **pm, const char *key, int64_t value, int flags)
Convenience wrapper for av_dict_set() that converts the value to a string and stores it.
Definition: dict.c:167
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:104
scd_probe
static int scd_probe(const AVProbeData *p)
Definition: scd.c:84
avpriv_request_sample
#define avpriv_request_sample(...)
Definition: tableprint_vlc.h:36
SCD_TRACK_HEADER_SIZE
#define SCD_TRACK_HEADER_SIZE
Definition: scd.c:36
SCD_TRACK_ID_OGG
#define SCD_TRACK_ID_OGG
Definition: scd.c:39
AVCodecParameters::codec_id
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
Definition: codec_par.h:62
AVPacket
This structure stores compressed data.
Definition: packet.h:351
av_freep
#define av_freep(p)
Definition: tableprint_vlc.h:34
flags
#define flags(name, subs,...)
Definition: cbs_av1.c:561
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
SCD_OFFSET_HEADER_SIZE
#define SCD_OFFSET_HEADER_SIZE
Definition: scd.c:35
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:887
avstring.h
scd_seek
static int scd_seek(AVFormatContext *s, int stream_index, int64_t pts, int flags)
Definition: scd.c:343
scd_read_packet
static int scd_read_packet(AVFormatContext *s, AVPacket *pkt)
Definition: scd.c:287
int
int
Definition: ffmpeg_filter.c:156
AV_RB64
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_WL32 unsigned int_TMPL AV_WL24 unsigned int_TMPL AV_WL16 uint64_t_TMPL AV_RB64
Definition: bytestream.h:95
scd_read_track
static int scd_read_track(AVFormatContext *s, SCDTrackHeader *track, int index)
Definition: scd.c:146
AV_RB16
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_WL32 unsigned int_TMPL AV_WL24 unsigned int_TMPL AV_WL16 uint64_t_TMPL AV_WB64 unsigned int_TMPL AV_WB32 unsigned int_TMPL AV_WB24 unsigned int_TMPL AV_RB16
Definition: bytestream.h:98
Generated on Tue Feb 28 2023 21:34:09 for FFmpeg by   doxygen 1.8.17

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