FFmpeg
bintext.c
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1 /*
2  * Binary text demuxer
3  * eXtended BINary text (XBIN) demuxer
4  * Artworx Data Format demuxer
5  * iCEDraw File demuxer
6  * Copyright (c) 2010 Peter Ross <pross@xvid.org>
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 
25 /**
26  * @file
27  * Binary text demuxer
28  * eXtended BINary text (XBIN) demuxer
29  * Artworx Data Format demuxer
30  * iCEDraw File demuxer
31  */
32 
33 #include "config_components.h"
34 
35 #include "libavutil/intreadwrite.h"
36 #include "libavutil/opt.h"
37 #include "libavutil/parseutils.h"
38 #include "avformat.h"
39 #include "demux.h"
40 #include "internal.h"
41 #include "sauce.h"
42 #include "libavcodec/bintext.h"
43 
44 typedef struct {
45  const AVClass *class;
46  int chars_per_frame; /**< characters to send decoder per frame;
47  set by private options as characters per second, and then
48  converted to characters per frame at runtime */
49  int width, height; /**< video size (WxH pixels) (private option) */
50  AVRational framerate; /**< frames per second (private option) */
51  uint64_t fsize; /**< file size less metadata buffer */
53 
55 {
56  BinDemuxContext *bin = s->priv_data;
58  if (!st)
59  return NULL;
60  st->codecpar->codec_tag = 0;
62 
63  if (!bin->width) {
64  st->codecpar->width = (80<<3);
65  st->codecpar->height = (25<<4);
66  }
67 
68  avpriv_set_pts_info(st, 60, bin->framerate.den, bin->framerate.num);
69 
70  /* simulate tty display speed */
71  bin->chars_per_frame = av_clip(av_q2d(st->time_base) * bin->chars_per_frame, 1, INT_MAX);
72 
73  return st;
74 }
75 
76 #if CONFIG_BINTEXT_DEMUXER | CONFIG_ADF_DEMUXER | CONFIG_IDF_DEMUXER
77 /**
78  * Given filesize and width, calculate height (assume font_height of 16)
79  */
80 static void calculate_height(AVCodecParameters *par, uint64_t fsize)
81 {
82  par->height = (fsize / ((par->width>>3)*2)) << 4;
83 }
84 #endif
85 
86 #if CONFIG_BINTEXT_DEMUXER
87 static const uint8_t next_magic[]={
88  0x1A, 0x1B, '[', '0', ';', '3', '0', ';', '4', '0', 'm', 'N', 'E', 'X', 'T', 0x00
89 };
90 
91 static int next_tag_read(AVFormatContext *avctx, uint64_t *fsize)
92 {
93  AVIOContext *pb = avctx->pb;
94  char buf[36];
95  int len;
96  uint64_t start_pos = avio_size(pb) - 256;
97 
98  avio_seek(pb, start_pos, SEEK_SET);
99  if (avio_read(pb, buf, sizeof(next_magic)) != sizeof(next_magic))
100  return -1;
101  if (memcmp(buf, next_magic, sizeof(next_magic)))
102  return -1;
103  if (avio_r8(pb) != 0x01)
104  return -1;
105 
106  *fsize -= 256;
107 
108 #define GET_EFI2_META(name,size) \
109  len = avio_r8(pb); \
110  if (len < 1 || len > size) \
111  return -1; \
112  if (avio_read(pb, buf, size) == size && *buf) { \
113  buf[len] = 0; \
114  av_dict_set(&avctx->metadata, name, buf, 0); \
115  }
116 
117  GET_EFI2_META("filename", 12)
118  GET_EFI2_META("author", 20)
119  GET_EFI2_META("publisher", 20)
120  GET_EFI2_META("title", 35)
121 
122  return 0;
123 }
124 
125 static void predict_width(AVCodecParameters *par, uint64_t fsize, int got_width)
126 {
127  /** attempt to guess width */
128  if (!got_width)
129  par->width = fsize > 4000 ? (160<<3) : (80<<3);
130 }
131 
132 static int bin_probe(const AVProbeData *p)
133 {
134  const uint8_t *d = p->buf;
135  int magic = 0, sauce = 0;
136 
137  if (p->buf_size > 256)
138  magic = !memcmp(d + p->buf_size - 256, next_magic, sizeof(next_magic));
139  if (p->buf_size > 128)
140  sauce = !memcmp(d + p->buf_size - 128, "SAUCE00", 7);
141 
142  if (magic)
143  return AVPROBE_SCORE_EXTENSION + 1;
144 
145  if (av_match_ext(p->filename, "bin")) {
146  AVCodecParameters par;
147  int got_width = 0;
148  par.width = par.height = 0;
149  if (sauce)
150  return AVPROBE_SCORE_EXTENSION + 1;
151 
152  predict_width(&par, p->buf_size, got_width);
153  if (par.width < 8)
154  return 0;
155  calculate_height(&par, p->buf_size);
156  if (par.height <= 0)
157  return 0;
158 
159  if (par.width * par.height * 2 / (8*16) == p->buf_size)
160  return AVPROBE_SCORE_MAX / 2;
161  return 0;
162  }
163 
164  if (sauce)
165  return 1;
166 
167  return 0;
168 }
169 
170 
171 static int bintext_read_header(AVFormatContext *s)
172 {
173  BinDemuxContext *bin = s->priv_data;
174  AVIOContext *pb = s->pb;
175  int ret;
176  AVStream *st = init_stream(s);
177  if (!st)
178  return AVERROR(ENOMEM);
180 
181  if ((ret = ff_alloc_extradata(st->codecpar, 2)) < 0)
182  return ret;
183  st->codecpar->extradata[0] = 16;
184  st->codecpar->extradata[1] = 0;
185 
186  if (pb->seekable & AVIO_SEEKABLE_NORMAL) {
187  int got_width = 0;
188  bin->fsize = avio_size(pb);
189  if (ff_sauce_read(s, &bin->fsize, &got_width, 0) < 0)
190  next_tag_read(s, &bin->fsize);
191  if (!bin->width) {
192  predict_width(st->codecpar, bin->fsize, got_width);
193  if (st->codecpar->width < 8)
194  return AVERROR_INVALIDDATA;
195  calculate_height(st->codecpar, bin->fsize);
196  }
197  avio_seek(pb, 0, SEEK_SET);
198  }
199  return 0;
200 }
201 #endif /* CONFIG_BINTEXT_DEMUXER */
202 
203 #if CONFIG_XBIN_DEMUXER
204 static int xbin_probe(const AVProbeData *p)
205 {
206  const uint8_t *d = p->buf;
207 
208  if (AV_RL32(d) == MKTAG('X','B','I','N') && d[4] == 0x1A &&
209  AV_RL16(d+5) > 0 && AV_RL16(d+5) <= 160 &&
210  d[9] > 0 && d[9] <= 32)
211  return AVPROBE_SCORE_MAX;
212  return 0;
213 }
214 
215 static int xbin_read_header(AVFormatContext *s)
216 {
217  BinDemuxContext *bin = s->priv_data;
218  AVIOContext *pb = s->pb;
219  char fontheight, flags;
220  int ret;
221  AVStream *st = init_stream(s);
222  if (!st)
223  return AVERROR(ENOMEM);
224 
225  avio_skip(pb, 5);
226  st->codecpar->width = avio_rl16(pb)<<3;
227  st->codecpar->height = avio_rl16(pb);
228  fontheight = avio_r8(pb);
229  st->codecpar->height *= fontheight;
230  flags = avio_r8(pb);
231 
232  st->codecpar->extradata_size = 2;
233  if ((flags & BINTEXT_PALETTE))
234  st->codecpar->extradata_size += 48;
235  if ((flags & BINTEXT_FONT))
236  st->codecpar->extradata_size += fontheight * (flags & 0x10 ? 512 : 256);
238 
240  if (ret < 0)
241  return ret;
242  st->codecpar->extradata[0] = fontheight;
243  st->codecpar->extradata[1] = flags;
244  if (avio_read(pb, st->codecpar->extradata + 2, st->codecpar->extradata_size - 2) < 0)
245  return AVERROR(EIO);
246 
247  if (pb->seekable & AVIO_SEEKABLE_NORMAL) {
248  bin->fsize = avio_size(pb) - 9 - st->codecpar->extradata_size;
249  ff_sauce_read(s, &bin->fsize, NULL, 0);
250  avio_seek(pb, 9 + st->codecpar->extradata_size, SEEK_SET);
251  }
252 
253  return 0;
254 }
255 #endif /* CONFIG_XBIN_DEMUXER */
256 
257 #if CONFIG_ADF_DEMUXER
258 static int adf_read_header(AVFormatContext *s)
259 {
260  BinDemuxContext *bin = s->priv_data;
261  AVIOContext *pb = s->pb;
262  AVStream *st;
263  int ret;
264 
265  if (avio_r8(pb) != 1)
266  return AVERROR_INVALIDDATA;
267 
268  st = init_stream(s);
269  if (!st)
270  return AVERROR(ENOMEM);
272 
273  if ((ret = ff_alloc_extradata(st->codecpar, 2 + 48 + 4096)) < 0)
274  return ret;
275  st->codecpar->extradata[0] = 16;
277 
278  if (avio_read(pb, st->codecpar->extradata + 2, 24) < 0)
279  return AVERROR(EIO);
280  avio_skip(pb, 144);
281  if (avio_read(pb, st->codecpar->extradata + 2 + 24, 24) < 0)
282  return AVERROR(EIO);
283  if (avio_read(pb, st->codecpar->extradata + 2 + 48, 4096) < 0)
284  return AVERROR(EIO);
285 
286  if (pb->seekable & AVIO_SEEKABLE_NORMAL) {
287  int got_width = 0;
288  bin->fsize = avio_size(pb) - 1 - 192 - 4096;
289  st->codecpar->width = 80<<3;
290  ff_sauce_read(s, &bin->fsize, &got_width, 0);
291  if (st->codecpar->width < 8)
292  return AVERROR_INVALIDDATA;
293  if (!bin->width)
294  calculate_height(st->codecpar, bin->fsize);
295  avio_seek(pb, 1 + 192 + 4096, SEEK_SET);
296  }
297  return 0;
298 }
299 #endif /* CONFIG_ADF_DEMUXER */
300 
301 #if CONFIG_IDF_DEMUXER
302 static const uint8_t idf_magic[] = {
303  0x04, 0x31, 0x2e, 0x34, 0x00, 0x00, 0x00, 0x00, 0x4f, 0x00, 0x15, 0x00
304 };
305 
306 static int idf_probe(const AVProbeData *p)
307 {
308  if (p->buf_size < sizeof(idf_magic))
309  return 0;
310  if (!memcmp(p->buf, idf_magic, sizeof(idf_magic)))
311  return AVPROBE_SCORE_MAX;
312  return 0;
313 }
314 
315 static int idf_read_header(AVFormatContext *s)
316 {
317  BinDemuxContext *bin = s->priv_data;
318  AVIOContext *pb = s->pb;
319  AVStream *st;
320  int got_width = 0, ret;
321 
322  if (!(pb->seekable & AVIO_SEEKABLE_NORMAL))
323  return AVERROR(EIO);
324 
325  st = init_stream(s);
326  if (!st)
327  return AVERROR(ENOMEM);
329 
330  if ((ret = ff_alloc_extradata(st->codecpar, 2 + 48 + 4096)) < 0)
331  return ret;
332  st->codecpar->extradata[0] = 16;
334 
335  avio_seek(pb, avio_size(pb) - 4096 - 48, SEEK_SET);
336 
337  if (avio_read(pb, st->codecpar->extradata + 2 + 48, 4096) < 0)
338  return AVERROR(EIO);
339  if (avio_read(pb, st->codecpar->extradata + 2, 48) < 0)
340  return AVERROR(EIO);
341 
342  bin->fsize = avio_size(pb) - 12 - 4096 - 48;
343  ff_sauce_read(s, &bin->fsize, &got_width, 0);
344  if (st->codecpar->width < 8)
345  return AVERROR_INVALIDDATA;
346  if (!bin->width)
347  calculate_height(st->codecpar, bin->fsize);
348  avio_seek(pb, 12, SEEK_SET);
349  return 0;
350 }
351 #endif /* CONFIG_IDF_DEMUXER */
352 
354  AVPacket *pkt)
355 {
356  BinDemuxContext *bin = s->priv_data;
357 
358  if (bin->fsize > 0) {
359  if (av_get_packet(s->pb, pkt, bin->fsize) < 0)
360  return AVERROR(EIO);
361  bin->fsize = -1; /* done */
362  } else if (!bin->fsize) {
363  if (avio_feof(s->pb))
364  return AVERROR(EIO);
365  if (av_get_packet(s->pb, pkt, bin->chars_per_frame) < 0)
366  return AVERROR(EIO);
367  } else {
368  return AVERROR(EIO);
369  }
370 
372  return 0;
373 }
374 
375 #define OFFSET(x) offsetof(BinDemuxContext, x)
376 static const AVOption options[] = {
377  { "linespeed", "set simulated line speed (bytes per second)", OFFSET(chars_per_frame), AV_OPT_TYPE_INT, {.i64 = 6000}, 1, INT_MAX, AV_OPT_FLAG_DECODING_PARAM},
378  { "video_size", "set video size, such as 640x480 or hd720.", OFFSET(width), AV_OPT_TYPE_IMAGE_SIZE, {.str = NULL}, 0, 0, AV_OPT_FLAG_DECODING_PARAM },
379  { "framerate", "set framerate (frames per second)", OFFSET(framerate), AV_OPT_TYPE_VIDEO_RATE, {.str = "25"}, 0, INT_MAX, AV_OPT_FLAG_DECODING_PARAM },
380  { NULL },
381 };
382 
383 #define CLASS(name) \
384 (const AVClass[1]){{ \
385  .class_name = name, \
386  .item_name = av_default_item_name, \
387  .option = options, \
388  .version = LIBAVUTIL_VERSION_INT, \
389 }}
390 
391 #if CONFIG_BINTEXT_DEMUXER
393  .p.name = "bin",
394  .p.long_name = NULL_IF_CONFIG_SMALL("Binary text"),
395  .p.priv_class = CLASS("Binary text demuxer"),
396  .priv_data_size = sizeof(BinDemuxContext),
397  .read_probe = bin_probe,
398  .read_header = bintext_read_header,
400 };
401 #endif
402 
403 #if CONFIG_XBIN_DEMUXER
405  .p.name = "xbin",
406  .p.long_name = NULL_IF_CONFIG_SMALL("eXtended BINary text (XBIN)"),
407  .p.priv_class = CLASS("eXtended BINary text (XBIN) demuxer"),
408  .priv_data_size = sizeof(BinDemuxContext),
409  .read_probe = xbin_probe,
410  .read_header = xbin_read_header,
412 };
413 #endif
414 
415 #if CONFIG_ADF_DEMUXER
417  .p.name = "adf",
418  .p.long_name = NULL_IF_CONFIG_SMALL("Artworx Data Format"),
419  .p.extensions = "adf",
420  .p.priv_class = CLASS("Artworx Data Format demuxer"),
421  .priv_data_size = sizeof(BinDemuxContext),
422  .read_header = adf_read_header,
424 };
425 #endif
426 
427 #if CONFIG_IDF_DEMUXER
429  .p.name = "idf",
430  .p.long_name = NULL_IF_CONFIG_SMALL("iCE Draw File"),
431  .p.extensions = "idf",
432  .p.priv_class = CLASS("iCE Draw File demuxer"),
433  .priv_data_size = sizeof(BinDemuxContext),
434  .read_probe = idf_probe,
435  .read_header = idf_read_header,
437 };
438 #endif
AVCodecParameters::extradata
uint8_t * extradata
Extra binary data needed for initializing the decoder, codec-dependent.
Definition: codec_par.h:69
av_clip
#define av_clip
Definition: common.h:100
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
AVCodecParameters::codec_type
enum AVMediaType codec_type
General type of the encoded data.
Definition: codec_par.h:51
AVCodecParameters
This struct describes the properties of an encoded stream.
Definition: codec_par.h:47
OFFSET
#define OFFSET(x)
Definition: bintext.c:375
avformat_new_stream
AVStream * avformat_new_stream(AVFormatContext *s, const struct AVCodec *c)
Add a new stream to a media file.
AV_OPT_TYPE_VIDEO_RATE
@ AV_OPT_TYPE_VIDEO_RATE
offset must point to AVRational
Definition: opt.h:258
AVOption
AVOption.
Definition: opt.h:357
AVCodecParameters::codec_tag
uint32_t codec_tag
Additional information about the codec (corresponds to the AVI FOURCC).
Definition: codec_par.h:59
AVProbeData::buf_size
int buf_size
Size of buf except extra allocated bytes.
Definition: avformat.h:454
avio_size
int64_t avio_size(AVIOContext *s)
Get the filesize.
Definition: aviobuf.c:323
AV_PKT_FLAG_KEY
#define AV_PKT_FLAG_KEY
The packet contains a keyframe.
Definition: packet.h:575
AVPROBE_SCORE_MAX
#define AVPROBE_SCORE_MAX
maximum score
Definition: avformat.h:463
return
these buffered frames must be flushed immediately if a new input produces new the filter must not call request_frame to get more It must just process the frame or queue it The task of requesting more frames is left to the filter s request_frame method or the application If a filter has several the filter must be ready for frames arriving randomly on any input any filter with several inputs will most likely require some kind of queuing mechanism It is perfectly acceptable to have a limited queue and to drop frames when the inputs are too unbalanced request_frame For filters that do not use the this method is called when a frame is wanted on an output For a it should directly call filter_frame on the corresponding output For a if there are queued frames already one of these frames should be pushed If the filter should request a frame on one of its repeatedly until at least one frame has been pushed Return or at least make progress towards producing a it should return
Definition: filter_design.txt:264
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:853
BinDemuxContext::chars_per_frame
int chars_per_frame
characters to send decoder per frame; set by private options as characters per second,...
Definition: bintext.c:46
avio_rl16
unsigned int avio_rl16(AVIOContext *s)
Definition: aviobuf.c:714
AVRational::num
int num
Numerator.
Definition: rational.h:59
pkt
AVPacket * pkt
Definition: movenc.c:60
width
#define width
intreadwrite.h
s
#define s(width, name)
Definition: cbs_vp9.c:198
AVInputFormat::name
const char * name
A comma separated list of short names for the format.
Definition: avformat.h:553
AVProbeData::buf
unsigned char * buf
Buffer must have AVPROBE_PADDING_SIZE of extra allocated bytes filled with zero.
Definition: avformat.h:453
AVCodecParameters::width
int width
Video only.
Definition: codec_par.h:134
av_q2d
static double av_q2d(AVRational a)
Convert an AVRational to a double.
Definition: rational.h:104
ff_idf_demuxer
const FFInputFormat ff_idf_demuxer
AVProbeData::filename
const char * filename
Definition: avformat.h:452
av_match_ext
int av_match_ext(const char *filename, const char *extensions)
Return a positive value if the given filename has one of the given extensions, 0 otherwise.
Definition: format.c:41
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
fsize
static int64_t fsize(FILE *f)
Definition: audiomatch.c:29
BinDemuxContext::width
int width
Definition: bintext.c:49
AVFormatContext
Format I/O context.
Definition: avformat.h:1255
internal.h
AVStream::codecpar
AVCodecParameters * codecpar
Codec parameters associated with this stream.
Definition: avformat.h:766
framerate
float framerate
Definition: av1_levels.c:29
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
AVStream::time_base
AVRational time_base
This is the fundamental unit of time (in seconds) in terms of which frame timestamps are represented.
Definition: avformat.h:782
NULL
#define NULL
Definition: coverity.c:32
ff_xbin_demuxer
const FFInputFormat ff_xbin_demuxer
AVRational
Rational number (pair of numerator and denominator).
Definition: rational.h:58
BinDemuxContext::framerate
AVRational framerate
frames per second (private option)
Definition: bintext.c:50
AV_OPT_TYPE_IMAGE_SIZE
@ AV_OPT_TYPE_IMAGE_SIZE
offset must point to two consecutive ints
Definition: opt.h:255
CLASS
#define CLASS(name)
Definition: bintext.c:383
AVFormatContext::pb
AVIOContext * pb
I/O context.
Definition: avformat.h:1297
parseutils.h
AVProbeData
This structure contains the data a format has to probe a file.
Definition: avformat.h:451
BinDemuxContext::fsize
uint64_t fsize
file size less metadata buffer
Definition: bintext.c:51
BINTEXT_PALETTE
#define BINTEXT_PALETTE
Definition: bintext.h:34
AVPROBE_SCORE_EXTENSION
#define AVPROBE_SCORE_EXTENSION
score for file extension
Definition: avformat.h:461
AVCodecParameters::extradata_size
int extradata_size
Size of the extradata content in bytes.
Definition: codec_par.h:73
AVIOContext
Bytestream IO Context.
Definition: avio.h:160
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:94
AV_CODEC_ID_IDF
@ AV_CODEC_ID_IDF
Definition: codec_id.h:585
AVIOContext::seekable
int seekable
A combination of AVIO_SEEKABLE_ flags or 0 when the stream is not seekable.
Definition: avio.h:261
ff_sauce_read
int ff_sauce_read(AVFormatContext *avctx, uint64_t *fsize, int *got_width, int get_height)
Definition: sauce.c:32
ff_adf_demuxer
const FFInputFormat ff_adf_demuxer
AV_CODEC_ID_BINTEXT
@ AV_CODEC_ID_BINTEXT
Definition: codec_id.h:583
FFInputFormat::p
AVInputFormat p
The public AVInputFormat.
Definition: demux.h:41
avio_r8
int avio_r8(AVIOContext *s)
Definition: aviobuf.c:603
height
#define height
AVPacket::flags
int flags
A combination of AV_PKT_FLAG values.
Definition: packet.h:526
read_packet
static int read_packet(AVFormatContext *s, AVPacket *pkt)
Definition: bintext.c:353
AVCodecParameters::height
int height
Definition: codec_par.h:135
bintext.h
options
static const AVOption options[]
Definition: bintext.c:376
demux.h
len
int len
Definition: vorbis_enc_data.h:426
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:91
init_stream
static AVStream * init_stream(AVFormatContext *s)
Definition: bintext.c:54
ret
ret
Definition: filter_design.txt:187
AVStream
Stream structure.
Definition: avformat.h:743
avio_seek
int64_t avio_seek(AVIOContext *s, int64_t offset, int whence)
fseek() equivalent for AVIOContext.
Definition: aviobuf.c:231
avformat.h
AV_RL32
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_RL32
Definition: bytestream.h:92
BINTEXT_FONT
#define BINTEXT_FONT
Definition: bintext.h:35
AVIO_SEEKABLE_NORMAL
#define AVIO_SEEKABLE_NORMAL
Seeking works like for a local file.
Definition: avio.h:41
AVRational::den
int den
Denominator.
Definition: rational.h:60
AV_OPT_TYPE_INT
@ AV_OPT_TYPE_INT
Definition: opt.h:245
avio_read
int avio_read(AVIOContext *s, unsigned char *buf, int size)
Read size bytes from AVIOContext into buf.
Definition: aviobuf.c:612
avio_skip
int64_t avio_skip(AVIOContext *s, int64_t offset)
Skip given number of bytes forward.
Definition: aviobuf.c:318
AV_CODEC_ID_XBIN
@ AV_CODEC_ID_XBIN
Definition: codec_id.h:584
AV_OPT_FLAG_DECODING_PARAM
#define AV_OPT_FLAG_DECODING_PARAM
A generic parameter which can be set by the user for demuxing or decoding.
Definition: opt.h:284
BinDemuxContext
Definition: bintext.c:44
AVMEDIA_TYPE_VIDEO
@ AVMEDIA_TYPE_VIDEO
Definition: avutil.h:201
read_probe
static int read_probe(const AVProbeData *p)
Definition: cdg.c:30
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:497
sauce.h
FFInputFormat
Definition: demux.h:37
ff_bintext_demuxer
const FFInputFormat ff_bintext_demuxer
d
d
Definition: ffmpeg_filter.c:424
flags
#define flags(name, subs,...)
Definition: cbs_av1.c:474
AVERROR_INVALIDDATA
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:61
MKTAG
#define MKTAG(a, b, c, d)
Definition: macros.h:55
ff_alloc_extradata
int ff_alloc_extradata(AVCodecParameters *par, int size)
Allocate extradata with additional AV_INPUT_BUFFER_PADDING_SIZE at end which is always set to 0.
Definition: utils.c:227
avio_feof
int avio_feof(AVIOContext *s)
Similar to feof() but also returns nonzero on read errors.
Definition: aviobuf.c:346