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 "internal.h"
40 #include "sauce.h"
41 #include "libavcodec/bintext.h"
42 
43 typedef struct {
44  const AVClass *class;
45  int chars_per_frame; /**< characters to send decoder per frame;
46  set by private options as characters per second, and then
47  converted to characters per frame at runtime */
48  int width, height; /**< video size (WxH pixels) (private option) */
49  AVRational framerate; /**< frames per second (private option) */
50  uint64_t fsize; /**< file size less metadata buffer */
52 
54 {
55  BinDemuxContext *bin = s->priv_data;
57  if (!st)
58  return NULL;
59  st->codecpar->codec_tag = 0;
61 
62  if (!bin->width) {
63  st->codecpar->width = (80<<3);
64  st->codecpar->height = (25<<4);
65  }
66 
67  avpriv_set_pts_info(st, 60, bin->framerate.den, bin->framerate.num);
68 
69  /* simulate tty display speed */
70  bin->chars_per_frame = av_clip(av_q2d(st->time_base) * bin->chars_per_frame, 1, INT_MAX);
71 
72  return st;
73 }
74 
75 #if CONFIG_BINTEXT_DEMUXER | CONFIG_ADF_DEMUXER | CONFIG_IDF_DEMUXER
76 /**
77  * Given filesize and width, calculate height (assume font_height of 16)
78  */
79 static void calculate_height(AVCodecParameters *par, uint64_t fsize)
80 {
81  par->height = (fsize / ((par->width>>3)*2)) << 4;
82 }
83 #endif
84 
85 #if CONFIG_BINTEXT_DEMUXER
86 static const uint8_t next_magic[]={
87  0x1A, 0x1B, '[', '0', ';', '3', '0', ';', '4', '0', 'm', 'N', 'E', 'X', 'T', 0x00
88 };
89 
90 static int next_tag_read(AVFormatContext *avctx, uint64_t *fsize)
91 {
92  AVIOContext *pb = avctx->pb;
93  char buf[36];
94  int len;
95  uint64_t start_pos = avio_size(pb) - 256;
96 
97  avio_seek(pb, start_pos, SEEK_SET);
98  if (avio_read(pb, buf, sizeof(next_magic)) != sizeof(next_magic))
99  return -1;
100  if (memcmp(buf, next_magic, sizeof(next_magic)))
101  return -1;
102  if (avio_r8(pb) != 0x01)
103  return -1;
104 
105  *fsize -= 256;
106 
107 #define GET_EFI2_META(name,size) \
108  len = avio_r8(pb); \
109  if (len < 1 || len > size) \
110  return -1; \
111  if (avio_read(pb, buf, size) == size && *buf) { \
112  buf[len] = 0; \
113  av_dict_set(&avctx->metadata, name, buf, 0); \
114  }
115 
116  GET_EFI2_META("filename", 12)
117  GET_EFI2_META("author", 20)
118  GET_EFI2_META("publisher", 20)
119  GET_EFI2_META("title", 35)
120 
121  return 0;
122 }
123 
124 static void predict_width(AVCodecParameters *par, uint64_t fsize, int got_width)
125 {
126  /** attempt to guess width */
127  if (!got_width)
128  par->width = fsize > 4000 ? (160<<3) : (80<<3);
129 }
130 
131 static int bin_probe(const AVProbeData *p)
132 {
133  const uint8_t *d = p->buf;
134  int magic = 0, sauce = 0;
135 
136  if (p->buf_size > 256)
137  magic = !memcmp(d + p->buf_size - 256, next_magic, sizeof(next_magic));
138  if (p->buf_size > 128)
139  sauce = !memcmp(d + p->buf_size - 128, "SAUCE00", 7);
140 
141  if (magic)
142  return AVPROBE_SCORE_EXTENSION + 1;
143 
144  if (av_match_ext(p->filename, "bin")) {
145  AVCodecParameters par;
146  int got_width = 0;
147  par.width = par.height = 0;
148  if (sauce)
149  return AVPROBE_SCORE_EXTENSION + 1;
150 
151  predict_width(&par, p->buf_size, got_width);
152  if (par.width < 8)
153  return 0;
154  calculate_height(&par, p->buf_size);
155  if (par.height <= 0)
156  return 0;
157 
158  if (par.width * par.height * 2 / (8*16) == p->buf_size)
159  return AVPROBE_SCORE_MAX / 2;
160  return 0;
161  }
162 
163  if (sauce)
164  return 1;
165 
166  return 0;
167 }
168 
169 
170 static int bintext_read_header(AVFormatContext *s)
171 {
172  BinDemuxContext *bin = s->priv_data;
173  AVIOContext *pb = s->pb;
174  int ret;
175  AVStream *st = init_stream(s);
176  if (!st)
177  return AVERROR(ENOMEM);
179 
180  if ((ret = ff_alloc_extradata(st->codecpar, 2)) < 0)
181  return ret;
182  st->codecpar->extradata[0] = 16;
183  st->codecpar->extradata[1] = 0;
184 
185  if (pb->seekable & AVIO_SEEKABLE_NORMAL) {
186  int got_width = 0;
187  bin->fsize = avio_size(pb);
188  if (ff_sauce_read(s, &bin->fsize, &got_width, 0) < 0)
189  next_tag_read(s, &bin->fsize);
190  if (!bin->width) {
191  predict_width(st->codecpar, bin->fsize, got_width);
192  if (st->codecpar->width < 8)
193  return AVERROR_INVALIDDATA;
194  calculate_height(st->codecpar, bin->fsize);
195  }
196  avio_seek(pb, 0, SEEK_SET);
197  }
198  return 0;
199 }
200 #endif /* CONFIG_BINTEXT_DEMUXER */
201 
202 #if CONFIG_XBIN_DEMUXER
203 static int xbin_probe(const AVProbeData *p)
204 {
205  const uint8_t *d = p->buf;
206 
207  if (AV_RL32(d) == MKTAG('X','B','I','N') && d[4] == 0x1A &&
208  AV_RL16(d+5) > 0 && AV_RL16(d+5) <= 160 &&
209  d[9] > 0 && d[9] <= 32)
210  return AVPROBE_SCORE_MAX;
211  return 0;
212 }
213 
214 static int xbin_read_header(AVFormatContext *s)
215 {
216  BinDemuxContext *bin = s->priv_data;
217  AVIOContext *pb = s->pb;
218  char fontheight, flags;
219  int ret;
220  AVStream *st = init_stream(s);
221  if (!st)
222  return AVERROR(ENOMEM);
223 
224  avio_skip(pb, 5);
225  st->codecpar->width = avio_rl16(pb)<<3;
226  st->codecpar->height = avio_rl16(pb);
227  fontheight = avio_r8(pb);
228  st->codecpar->height *= fontheight;
229  flags = avio_r8(pb);
230 
231  st->codecpar->extradata_size = 2;
232  if ((flags & BINTEXT_PALETTE))
233  st->codecpar->extradata_size += 48;
234  if ((flags & BINTEXT_FONT))
235  st->codecpar->extradata_size += fontheight * (flags & 0x10 ? 512 : 256);
237 
239  if (ret < 0)
240  return ret;
241  st->codecpar->extradata[0] = fontheight;
242  st->codecpar->extradata[1] = flags;
243  if (avio_read(pb, st->codecpar->extradata + 2, st->codecpar->extradata_size - 2) < 0)
244  return AVERROR(EIO);
245 
246  if (pb->seekable & AVIO_SEEKABLE_NORMAL) {
247  bin->fsize = avio_size(pb) - 9 - st->codecpar->extradata_size;
248  ff_sauce_read(s, &bin->fsize, NULL, 0);
249  avio_seek(pb, 9 + st->codecpar->extradata_size, SEEK_SET);
250  }
251 
252  return 0;
253 }
254 #endif /* CONFIG_XBIN_DEMUXER */
255 
256 #if CONFIG_ADF_DEMUXER
257 static int adf_read_header(AVFormatContext *s)
258 {
259  BinDemuxContext *bin = s->priv_data;
260  AVIOContext *pb = s->pb;
261  AVStream *st;
262  int ret;
263 
264  if (avio_r8(pb) != 1)
265  return AVERROR_INVALIDDATA;
266 
267  st = init_stream(s);
268  if (!st)
269  return AVERROR(ENOMEM);
271 
272  if ((ret = ff_alloc_extradata(st->codecpar, 2 + 48 + 4096)) < 0)
273  return ret;
274  st->codecpar->extradata[0] = 16;
276 
277  if (avio_read(pb, st->codecpar->extradata + 2, 24) < 0)
278  return AVERROR(EIO);
279  avio_skip(pb, 144);
280  if (avio_read(pb, st->codecpar->extradata + 2 + 24, 24) < 0)
281  return AVERROR(EIO);
282  if (avio_read(pb, st->codecpar->extradata + 2 + 48, 4096) < 0)
283  return AVERROR(EIO);
284 
285  if (pb->seekable & AVIO_SEEKABLE_NORMAL) {
286  int got_width = 0;
287  bin->fsize = avio_size(pb) - 1 - 192 - 4096;
288  st->codecpar->width = 80<<3;
289  ff_sauce_read(s, &bin->fsize, &got_width, 0);
290  if (st->codecpar->width < 8)
291  return AVERROR_INVALIDDATA;
292  if (!bin->width)
293  calculate_height(st->codecpar, bin->fsize);
294  avio_seek(pb, 1 + 192 + 4096, SEEK_SET);
295  }
296  return 0;
297 }
298 #endif /* CONFIG_ADF_DEMUXER */
299 
300 #if CONFIG_IDF_DEMUXER
301 static const uint8_t idf_magic[] = {
302  0x04, 0x31, 0x2e, 0x34, 0x00, 0x00, 0x00, 0x00, 0x4f, 0x00, 0x15, 0x00
303 };
304 
305 static int idf_probe(const AVProbeData *p)
306 {
307  if (p->buf_size < sizeof(idf_magic))
308  return 0;
309  if (!memcmp(p->buf, idf_magic, sizeof(idf_magic)))
310  return AVPROBE_SCORE_MAX;
311  return 0;
312 }
313 
314 static int idf_read_header(AVFormatContext *s)
315 {
316  BinDemuxContext *bin = s->priv_data;
317  AVIOContext *pb = s->pb;
318  AVStream *st;
319  int got_width = 0, ret;
320 
321  if (!(pb->seekable & AVIO_SEEKABLE_NORMAL))
322  return AVERROR(EIO);
323 
324  st = init_stream(s);
325  if (!st)
326  return AVERROR(ENOMEM);
328 
329  if ((ret = ff_alloc_extradata(st->codecpar, 2 + 48 + 4096)) < 0)
330  return ret;
331  st->codecpar->extradata[0] = 16;
333 
334  avio_seek(pb, avio_size(pb) - 4096 - 48, SEEK_SET);
335 
336  if (avio_read(pb, st->codecpar->extradata + 2 + 48, 4096) < 0)
337  return AVERROR(EIO);
338  if (avio_read(pb, st->codecpar->extradata + 2, 48) < 0)
339  return AVERROR(EIO);
340 
341  bin->fsize = avio_size(pb) - 12 - 4096 - 48;
342  ff_sauce_read(s, &bin->fsize, &got_width, 0);
343  if (st->codecpar->width < 8)
344  return AVERROR_INVALIDDATA;
345  if (!bin->width)
346  calculate_height(st->codecpar, bin->fsize);
347  avio_seek(pb, 12, SEEK_SET);
348  return 0;
349 }
350 #endif /* CONFIG_IDF_DEMUXER */
351 
353  AVPacket *pkt)
354 {
355  BinDemuxContext *bin = s->priv_data;
356 
357  if (bin->fsize > 0) {
358  if (av_get_packet(s->pb, pkt, bin->fsize) < 0)
359  return AVERROR(EIO);
360  bin->fsize = -1; /* done */
361  } else if (!bin->fsize) {
362  if (avio_feof(s->pb))
363  return AVERROR(EIO);
364  if (av_get_packet(s->pb, pkt, bin->chars_per_frame) < 0)
365  return AVERROR(EIO);
366  } else {
367  return AVERROR(EIO);
368  }
369 
371  return 0;
372 }
373 
374 #define OFFSET(x) offsetof(BinDemuxContext, x)
375 static const AVOption options[] = {
376  { "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},
377  { "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 },
378  { "framerate", "set framerate (frames per second)", OFFSET(framerate), AV_OPT_TYPE_VIDEO_RATE, {.str = "25"}, 0, INT_MAX, AV_OPT_FLAG_DECODING_PARAM },
379  { NULL },
380 };
381 
382 #define CLASS(name) \
383 (const AVClass[1]){{ \
384  .class_name = name, \
385  .item_name = av_default_item_name, \
386  .option = options, \
387  .version = LIBAVUTIL_VERSION_INT, \
388 }}
389 
390 #if CONFIG_BINTEXT_DEMUXER
392  .name = "bin",
393  .long_name = NULL_IF_CONFIG_SMALL("Binary text"),
394  .priv_data_size = sizeof(BinDemuxContext),
395  .read_probe = bin_probe,
396  .read_header = bintext_read_header,
398  .priv_class = CLASS("Binary text demuxer"),
399 };
400 #endif
401 
402 #if CONFIG_XBIN_DEMUXER
404  .name = "xbin",
405  .long_name = NULL_IF_CONFIG_SMALL("eXtended BINary text (XBIN)"),
406  .priv_data_size = sizeof(BinDemuxContext),
407  .read_probe = xbin_probe,
408  .read_header = xbin_read_header,
410  .priv_class = CLASS("eXtended BINary text (XBIN) demuxer"),
411 };
412 #endif
413 
414 #if CONFIG_ADF_DEMUXER
416  .name = "adf",
417  .long_name = NULL_IF_CONFIG_SMALL("Artworx Data Format"),
418  .priv_data_size = sizeof(BinDemuxContext),
419  .read_header = adf_read_header,
421  .extensions = "adf",
422  .priv_class = CLASS("Artworx Data Format demuxer"),
423 };
424 #endif
425 
426 #if CONFIG_IDF_DEMUXER
428  .name = "idf",
429  .long_name = NULL_IF_CONFIG_SMALL("iCE Draw File"),
430  .priv_data_size = sizeof(BinDemuxContext),
431  .read_probe = idf_probe,
432  .read_header = idf_read_header,
434  .extensions = "idf",
435  .priv_class = CLASS("iCE Draw File demuxer"),
436 };
437 #endif
AVCodecParameters::extradata
uint8_t * extradata
Extra binary data needed for initializing the decoder, codec-dependent.
Definition: codec_par.h:76
av_clip
#define av_clip
Definition: common.h:95
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
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
OFFSET
#define OFFSET(x)
Definition: bintext.c:374
AV_OPT_TYPE_VIDEO_RATE
@ AV_OPT_TYPE_VIDEO_RATE
offset must point to AVRational
Definition: opt.h:238
AVOption
AVOption.
Definition: opt.h:251
AVCodecParameters::codec_tag
uint32_t codec_tag
Additional information about the codec (corresponds to the AVI FOURCC).
Definition: codec_par.h:66
AVProbeData::buf_size
int buf_size
Size of buf except extra allocated bytes.
Definition: avformat.h:456
avio_size
int64_t avio_size(AVIOContext *s)
Get the filesize.
Definition: aviobuf.c:354
AV_PKT_FLAG_KEY
#define AV_PKT_FLAG_KEY
The packet contains a keyframe.
Definition: packet.h:429
AVPROBE_SCORE_MAX
#define AVPROBE_SCORE_MAX
maximum score
Definition: avformat.h:465
framerate
int framerate
Definition: h264_levels.c:65
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
ff_bintext_demuxer
const AVInputFormat ff_bintext_demuxer
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
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:45
ff_idf_demuxer
const AVInputFormat ff_idf_demuxer
avio_rl16
unsigned int avio_rl16(AVIOContext *s)
Definition: aviobuf.c:745
AVRational::num
int num
Numerator.
Definition: rational.h:59
pkt
AVPacket * pkt
Definition: movenc.c:59
AVInputFormat
Definition: avformat.h:656
width
#define width
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:661
AVProbeData::buf
unsigned char * buf
Buffer must have AVPROBE_PADDING_SIZE of extra allocated bytes filled with zero.
Definition: avformat.h:455
AVCodecParameters::width
int width
Video only.
Definition: codec_par.h:128
av_q2d
static double av_q2d(AVRational a)
Convert an AVRational to a double.
Definition: rational.h:104
AVProbeData::filename
const char * filename
Definition: avformat.h:454
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:40
ff_xbin_demuxer
const AVInputFormat ff_xbin_demuxer
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:48
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
read_header
static int read_header(FFV1Context *f)
Definition: ffv1dec.c:540
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:978
NULL
#define NULL
Definition: coverity.c:32
read_probe
static int read_probe(const AVProbeData *pd)
Definition: jvdec.c:55
AVRational
Rational number (pair of numerator and denominator).
Definition: rational.h:58
BinDemuxContext::framerate
AVRational framerate
frames per second (private option)
Definition: bintext.c:49
AV_OPT_TYPE_IMAGE_SIZE
@ AV_OPT_TYPE_IMAGE_SIZE
offset must point to two consecutive integers
Definition: opt.h:235
CLASS
#define CLASS(name)
Definition: bintext.c:382
AVFormatContext::pb
AVIOContext * pb
I/O context.
Definition: avformat.h:1258
parseutils.h
AVProbeData
This structure contains the data a format has to probe a file.
Definition: avformat.h:453
BinDemuxContext::fsize
uint64_t fsize
file size less metadata buffer
Definition: bintext.c:50
BINTEXT_PALETTE
#define BINTEXT_PALETTE
Definition: bintext.h:34
AVPROBE_SCORE_EXTENSION
#define AVPROBE_SCORE_EXTENSION
score for file extension
Definition: avformat.h:463
AVCodecParameters::extradata_size
int extradata_size
Size of the extradata content in bytes.
Definition: codec_par.h:80
AVIOContext
Bytestream IO Context.
Definition: avio.h:166
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
AV_CODEC_ID_IDF
@ AV_CODEC_ID_IDF
Definition: codec_id.h:574
AVIOContext::seekable
int seekable
A combination of AVIO_SEEKABLE_ flags or 0 when the stream is not seekable.
Definition: avio.h:267
ff_sauce_read
int ff_sauce_read(AVFormatContext *avctx, uint64_t *fsize, int *got_width, int get_height)
Definition: sauce.c:32
AV_CODEC_ID_BINTEXT
@ AV_CODEC_ID_BINTEXT
Definition: codec_id.h:572
avio_r8
int avio_r8(AVIOContext *s)
Definition: aviobuf.c:634
height
#define height
AVPacket::flags
int flags
A combination of AV_PKT_FLAG values.
Definition: packet.h:380
ff_adf_demuxer
const AVInputFormat ff_adf_demuxer
read_packet
static int read_packet(AVFormatContext *s, AVPacket *pkt)
Definition: bintext.c:352
AVCodecParameters::height
int height
Definition: codec_par.h:129
bintext.h
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:282
options
static const AVOption options[]
Definition: bintext.c:375
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:102
init_stream
static AVStream * init_stream(AVFormatContext *s)
Definition: bintext.c:53
ret
ret
Definition: filter_design.txt:187
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:262
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:225
avio_read
int avio_read(AVIOContext *s, unsigned char *buf, int size)
Read size bytes from AVIOContext into buf.
Definition: aviobuf.c:643
avio_skip
int64_t avio_skip(AVIOContext *s, int64_t offset)
Skip given number of bytes forward.
Definition: aviobuf.c:349
AV_CODEC_ID_XBIN
@ AV_CODEC_ID_XBIN
Definition: codec_id.h:573
BinDemuxContext
Definition: bintext.c:43
AVMEDIA_TYPE_VIDEO
@ AVMEDIA_TYPE_VIDEO
Definition: avutil.h:201
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
sauce.h
d
d
Definition: ffmpeg_filter.c:156
flags
#define flags(name, subs,...)
Definition: cbs_av1.c:561
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:238
avio_feof
int avio_feof(AVIOContext *s)
Similar to feof() but also returns nonzero on read errors.
Definition: aviobuf.c:377