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 "avio_internal.h"
40 #include "demux.h"
41 #include "internal.h"
42 #include "sauce.h"
43 #include "libavcodec/bintext.h"
44 
45 typedef struct {
46  const AVClass *class;
47  int chars_per_frame; /**< characters to send decoder per frame;
48  set by private options as characters per second, and then
49  converted to characters per frame at runtime */
50  int width, height; /**< video size (WxH pixels) (private option) */
51  AVRational framerate; /**< frames per second (private option) */
52  uint64_t fsize; /**< file size less metadata buffer */
53 } BinDemuxContext;
54 
55 static AVStream * init_stream(AVFormatContext *s)
56 {
57  BinDemuxContext *bin = s->priv_data;
58  AVStream *st = avformat_new_stream(s, NULL);
59  if (!st)
60  return NULL;
61  st->codecpar->codec_tag = 0;
62  st->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
63 
64  if (!bin->width) {
65  st->codecpar->width = (80<<3);
66  st->codecpar->height = (25<<4);
67  }
68 
69  avpriv_set_pts_info(st, 60, bin->framerate.den, bin->framerate.num);
70 
71  /* simulate tty display speed */
72  bin->chars_per_frame = av_clip(av_q2d(st->time_base) * bin->chars_per_frame, 1, INT_MAX);
73 
74  return st;
75 }
76 
77 #if CONFIG_BINTEXT_DEMUXER | CONFIG_ADF_DEMUXER | CONFIG_IDF_DEMUXER
78 /**
79  * Given filesize and width, calculate height (assume font_height of 16)
80  */
81 static void calculate_height(AVCodecParameters *par, uint64_t fsize)
82 {
83  par->height = (fsize / ((par->width>>3)*2)) << 4;
84 }
85 #endif
86 
87 #if CONFIG_BINTEXT_DEMUXER
88 static const uint8_t next_magic[]={
89  0x1A, 0x1B, '[', '0', ';', '3', '0', ';', '4', '0', 'm', 'N', 'E', 'X', 'T', 0x00
90 };
91 
92 static int next_tag_read(AVFormatContext *avctx, uint64_t *fsize)
93 {
94  AVIOContext *pb = avctx->pb;
95  char buf[36];
96  int len;
97  int64_t start_pos = avio_size(pb);
98 
99  if (start_pos < 256)
100  return AVERROR_INVALIDDATA;
101 
102  avio_seek(pb, start_pos - 256, SEEK_SET);
103  if ((len = ffio_read_size(pb, buf, sizeof(next_magic))) < 0)
104  return len;
105  if (memcmp(buf, next_magic, sizeof(next_magic)))
106  return -1;
107  if (avio_r8(pb) != 0x01)
108  return -1;
109 
110  *fsize -= 256;
111 
112 #define GET_EFI2_META(name,size) \
113  len = avio_r8(pb); \
114  if (len < 1 || len > size) \
115  return -1; \
116  if (avio_read(pb, buf, size) == size && *buf) { \
117  buf[len] = 0; \
118  av_dict_set(&avctx->metadata, name, buf, 0); \
119  }
120 
121  GET_EFI2_META("filename", 12)
122  GET_EFI2_META("author", 20)
123  GET_EFI2_META("publisher", 20)
124  GET_EFI2_META("title", 35)
125 
126  return 0;
127 }
128 
129 static void predict_width(AVCodecParameters *par, uint64_t fsize, int got_width)
130 {
131  /** attempt to guess width */
132  if (!got_width)
133  par->width = fsize > 4000 ? (160<<3) : (80<<3);
134 }
135 
136 static int bin_probe(const AVProbeData *p)
137 {
138  const uint8_t *d = p->buf;
139  int magic = 0, sauce = 0;
140 
141  if (p->buf_size > 256)
142  magic = !memcmp(d + p->buf_size - 256, next_magic, sizeof(next_magic));
143  if (p->buf_size > 128)
144  sauce = !memcmp(d + p->buf_size - 128, "SAUCE00", 7);
145 
146  if (magic)
147  return AVPROBE_SCORE_EXTENSION + 1;
148 
149  if (av_match_ext(p->filename, "bin")) {
150  AVCodecParameters par;
151  int got_width = 0;
152  par.width = par.height = 0;
153  if (sauce)
154  return AVPROBE_SCORE_EXTENSION + 1;
155 
156  predict_width(&par, p->buf_size, got_width);
157  if (par.width < 8)
158  return 0;
159  calculate_height(&par, p->buf_size);
160  if (par.height <= 0)
161  return 0;
162 
163  if (par.width * par.height * 2 / (8*16) == p->buf_size)
164  return AVPROBE_SCORE_MAX / 2;
165  return 0;
166  }
167 
168  if (sauce)
169  return 1;
170 
171  return 0;
172 }
173 
174 
175 static int bintext_read_header(AVFormatContext *s)
176 {
177  BinDemuxContext *bin = s->priv_data;
178  AVIOContext *pb = s->pb;
179  int ret;
180  AVStream *st = init_stream(s);
181  if (!st)
182  return AVERROR(ENOMEM);
183  st->codecpar->codec_id = AV_CODEC_ID_BINTEXT;
184 
185  if ((ret = ff_alloc_extradata(st->codecpar, 2)) < 0)
186  return ret;
187  st->codecpar->extradata[0] = 16;
188  st->codecpar->extradata[1] = 0;
189 
190  if (pb->seekable & AVIO_SEEKABLE_NORMAL) {
191  int got_width = 0;
192  bin->fsize = avio_size(pb);
193  if (ff_sauce_read(s, &bin->fsize, &got_width, 0) < 0)
194  next_tag_read(s, &bin->fsize);
195  if (!bin->width) {
196  predict_width(st->codecpar, bin->fsize, got_width);
197  if (st->codecpar->width < 8)
198  return AVERROR_INVALIDDATA;
199  calculate_height(st->codecpar, bin->fsize);
200  }
201  avio_seek(pb, 0, SEEK_SET);
202  }
203  return 0;
204 }
205 #endif /* CONFIG_BINTEXT_DEMUXER */
206 
207 #if CONFIG_XBIN_DEMUXER
208 static int xbin_probe(const AVProbeData *p)
209 {
210  const uint8_t *d = p->buf;
211 
212  if (AV_RL32(d) == MKTAG('X','B','I','N') && d[4] == 0x1A &&
213  AV_RL16(d+5) > 0 && AV_RL16(d+5) <= 160 &&
214  d[9] > 0 && d[9] <= 32)
215  return AVPROBE_SCORE_MAX;
216  return 0;
217 }
218 
219 static int xbin_read_header(AVFormatContext *s)
220 {
221  BinDemuxContext *bin = s->priv_data;
222  AVIOContext *pb = s->pb;
223  char fontheight, flags;
224  int ret;
225  AVStream *st = init_stream(s);
226  if (!st)
227  return AVERROR(ENOMEM);
228 
229  avio_skip(pb, 5);
230  st->codecpar->width = avio_rl16(pb)<<3;
231  st->codecpar->height = avio_rl16(pb);
232  fontheight = avio_r8(pb);
233  st->codecpar->height *= fontheight;
234  flags = avio_r8(pb);
235 
236  st->codecpar->extradata_size = 2;
237  if ((flags & BINTEXT_PALETTE))
238  st->codecpar->extradata_size += 48;
239  if ((flags & BINTEXT_FONT))
240  st->codecpar->extradata_size += fontheight * (flags & 0x10 ? 512 : 256);
241  st->codecpar->codec_id = flags & 4 ? AV_CODEC_ID_XBIN : AV_CODEC_ID_BINTEXT;
242 
243  ret = ff_alloc_extradata(st->codecpar, st->codecpar->extradata_size);
244  if (ret < 0)
245  return ret;
246  st->codecpar->extradata[0] = fontheight;
247  st->codecpar->extradata[1] = flags;
248  if ((ret = ffio_read_size(pb, st->codecpar->extradata + 2, st->codecpar->extradata_size - 2)) < 0)
249  return ret;
250 
251  if (pb->seekable & AVIO_SEEKABLE_NORMAL) {
252  int64_t fsize = avio_size(pb);
253  if (fsize < 9 + st->codecpar->extradata_size)
254  return 0;
255  bin->fsize = fsize - 9 - st->codecpar->extradata_size;
256  ff_sauce_read(s, &bin->fsize, NULL, 0);
257  avio_seek(pb, 9 + st->codecpar->extradata_size, SEEK_SET);
258  }
259 
260  return 0;
261 }
262 #endif /* CONFIG_XBIN_DEMUXER */
263 
264 #if CONFIG_ADF_DEMUXER
265 static int adf_read_header(AVFormatContext *s)
266 {
267  BinDemuxContext *bin = s->priv_data;
268  AVIOContext *pb = s->pb;
269  AVStream *st;
270  int ret;
271 
272  if (avio_r8(pb) != 1)
273  return AVERROR_INVALIDDATA;
274 
275  st = init_stream(s);
276  if (!st)
277  return AVERROR(ENOMEM);
278  st->codecpar->codec_id = AV_CODEC_ID_BINTEXT;
279 
280  if ((ret = ff_alloc_extradata(st->codecpar, 2 + 48 + 4096)) < 0)
281  return ret;
282  st->codecpar->extradata[0] = 16;
283  st->codecpar->extradata[1] = BINTEXT_PALETTE|BINTEXT_FONT;
284 
285  if ((ret = ffio_read_size(pb, st->codecpar->extradata + 2, 24)) < 0)
286  return ret;
287  avio_skip(pb, 144);
288  if ((ret = ffio_read_size(pb, st->codecpar->extradata + 2 + 24, 24)) < 0)
289  return ret;
290  if ((ret = ffio_read_size(pb, st->codecpar->extradata + 2 + 48, 4096)) < 0)
291  return ret;
292 
293  if (pb->seekable & AVIO_SEEKABLE_NORMAL) {
294  int got_width = 0;
295  int64_t fsize = avio_size(pb);
296  if (fsize < 1 + 192 + 4096)
297  return 0;
298  bin->fsize = fsize - 1 - 192 - 4096;
299  st->codecpar->width = 80<<3;
300  ff_sauce_read(s, &bin->fsize, &got_width, 0);
301  if (st->codecpar->width < 8)
302  return AVERROR_INVALIDDATA;
303  if (!bin->width)
304  calculate_height(st->codecpar, bin->fsize);
305  avio_seek(pb, 1 + 192 + 4096, SEEK_SET);
306  }
307  return 0;
308 }
309 #endif /* CONFIG_ADF_DEMUXER */
310 
311 #if CONFIG_IDF_DEMUXER
312 static const uint8_t idf_magic[] = {
313  0x04, 0x31, 0x2e, 0x34, 0x00, 0x00, 0x00, 0x00, 0x4f, 0x00, 0x15, 0x00
314 };
315 
316 static int idf_probe(const AVProbeData *p)
317 {
318  if (p->buf_size < sizeof(idf_magic))
319  return 0;
320  if (!memcmp(p->buf, idf_magic, sizeof(idf_magic)))
321  return AVPROBE_SCORE_MAX;
322  return 0;
323 }
324 
325 static int idf_read_header(AVFormatContext *s)
326 {
327  BinDemuxContext *bin = s->priv_data;
328  AVIOContext *pb = s->pb;
329  AVStream *st;
330  int got_width = 0, ret;
331  int64_t fsize;
332 
333  if (!(pb->seekable & AVIO_SEEKABLE_NORMAL))
334  return AVERROR_INVALIDDATA;
335 
336  st = init_stream(s);
337  if (!st)
338  return AVERROR(ENOMEM);
339  st->codecpar->codec_id = AV_CODEC_ID_IDF;
340 
341  if ((ret = ff_alloc_extradata(st->codecpar, 2 + 48 + 4096)) < 0)
342  return ret;
343  st->codecpar->extradata[0] = 16;
344  st->codecpar->extradata[1] = BINTEXT_PALETTE|BINTEXT_FONT;
345 
346  fsize = avio_size(pb);
347  if (fsize < 12 + 4096 + 48)
348  return AVERROR_INVALIDDATA;
349  bin->fsize = fsize - 12 - 4096 - 48;
350 
351  avio_seek(pb, bin->fsize + 12, SEEK_SET);
352 
353  if ((ret = ffio_read_size(pb, st->codecpar->extradata + 2 + 48, 4096)) < 0)
354  return ret;
355  if ((ret = ffio_read_size(pb, st->codecpar->extradata + 2, 48)) < 0)
356  return ret;
357 
358  ff_sauce_read(s, &bin->fsize, &got_width, 0);
359  if (st->codecpar->width < 8)
360  return AVERROR_INVALIDDATA;
361  if (!bin->width)
362  calculate_height(st->codecpar, bin->fsize);
363  avio_seek(pb, 12, SEEK_SET);
364  return 0;
365 }
366 #endif /* CONFIG_IDF_DEMUXER */
367 
368 static int read_packet(AVFormatContext *s,
369  AVPacket *pkt)
370 {
371  BinDemuxContext *bin = s->priv_data;
372 
373  if (bin->fsize > 0) {
374  if (av_get_packet(s->pb, pkt, bin->fsize) < 0)
375  return AVERROR_INVALIDDATA;
376  bin->fsize = -1; /* done */
377  } else if (!bin->fsize) {
378  if (avio_feof(s->pb))
379  return AVERROR_INVALIDDATA;
380  if (av_get_packet(s->pb, pkt, bin->chars_per_frame) < 0)
381  return AVERROR_INVALIDDATA;
382  } else {
383  return AVERROR_INVALIDDATA;
384  }
385 
386  pkt->flags |= AV_PKT_FLAG_KEY;
387  return 0;
388 }
389 
390 #define OFFSET(x) offsetof(BinDemuxContext, x)
391 static const AVOption options[] = {
392  { "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},
393  { "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 },
394  { "framerate", "set framerate (frames per second)", OFFSET(framerate), AV_OPT_TYPE_VIDEO_RATE, {.str = "25"}, 0, INT_MAX, AV_OPT_FLAG_DECODING_PARAM },
395  { NULL },
396 };
397 
398 #define CLASS(name) \
399 (const AVClass[1]){{ \
400  .class_name = name, \
401  .item_name = av_default_item_name, \
402  .option = options, \
403  .version = LIBAVUTIL_VERSION_INT, \
404 }}
405 
406 #if CONFIG_BINTEXT_DEMUXER
407 const FFInputFormat ff_bintext_demuxer = {
408  .p.name = "bin",
409  .p.long_name = NULL_IF_CONFIG_SMALL("Binary text"),
410  .p.priv_class = CLASS("Binary text demuxer"),
411  .priv_data_size = sizeof(BinDemuxContext),
412  .read_probe = bin_probe,
413  .read_header = bintext_read_header,
414  .read_packet = read_packet,
415 };
416 #endif
417 
418 #if CONFIG_XBIN_DEMUXER
419 const FFInputFormat ff_xbin_demuxer = {
420  .p.name = "xbin",
421  .p.long_name = NULL_IF_CONFIG_SMALL("eXtended BINary text (XBIN)"),
422  .p.priv_class = CLASS("eXtended BINary text (XBIN) demuxer"),
423  .priv_data_size = sizeof(BinDemuxContext),
424  .read_probe = xbin_probe,
425  .read_header = xbin_read_header,
426  .read_packet = read_packet,
427 };
428 #endif
429 
430 #if CONFIG_ADF_DEMUXER
431 const FFInputFormat ff_adf_demuxer = {
432  .p.name = "adf",
433  .p.long_name = NULL_IF_CONFIG_SMALL("Artworx Data Format"),
434  .p.extensions = "adf",
435  .p.priv_class = CLASS("Artworx Data Format demuxer"),
436  .priv_data_size = sizeof(BinDemuxContext),
437  .read_header = adf_read_header,
438  .read_packet = read_packet,
439 };
440 #endif
441 
442 #if CONFIG_IDF_DEMUXER
443 const FFInputFormat ff_idf_demuxer = {
444  .p.name = "idf",
445  .p.long_name = NULL_IF_CONFIG_SMALL("iCE Draw File"),
446  .p.extensions = "idf",
447  .p.priv_class = CLASS("iCE Draw File demuxer"),
448  .priv_data_size = sizeof(BinDemuxContext),
449  .read_probe = idf_probe,
450  .read_header = idf_read_header,
451  .read_packet = read_packet,
452 };
453 #endif
flags
const SwsFlags flags[]
Definition: swscale.c:61
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:390
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
Underlying C type is AVRational.
Definition: opt.h:315
int64_t
long long int64_t
Definition: coverity.c:34
AVOption
AVOption.
Definition: opt.h:429
AVCodecParameters::codec_tag
uint32_t codec_tag
Additional information about the codec (corresponds to the AVI FOURCC).
Definition: codec_par.h:59
avio_size
int64_t avio_size(AVIOContext *s)
Get the filesize.
Definition: aviobuf.c:326
AV_PKT_FLAG_KEY
#define AV_PKT_FLAG_KEY
The packet contains a keyframe.
Definition: packet.h:643
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:265
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:777
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:47
avio_rl16
unsigned int avio_rl16(AVIOContext *s)
Definition: aviobuf.c:717
AVRational::num
int num
Numerator.
Definition: rational.h:59
pkt
AVPacket * pkt
Definition: movenc.c:60
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:549
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
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:50
AVFormatContext
Format I/O context.
Definition: avformat.h:1264
internal.h
AVStream::codecpar
AVCodecParameters * codecpar
Codec parameters associated with this stream.
Definition: avformat.h:767
framerate
float framerate
Definition: av1_levels.c:29
AVClass
Describe the class of an AVClass context structure.
Definition: log.h:76
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:783
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:51
AV_OPT_TYPE_IMAGE_SIZE
@ AV_OPT_TYPE_IMAGE_SIZE
Underlying C type is two consecutive integers.
Definition: opt.h:303
CLASS
#define CLASS(name)
Definition: bintext.c:398
AVFormatContext::pb
AVIOContext * pb
I/O context.
Definition: avformat.h:1306
parseutils.h
AVProbeData
This structure contains the data a format has to probe a file.
Definition: avformat.h:451
options
Definition: swscale.c:43
BinDemuxContext::fsize
uint64_t fsize
file size less metadata buffer
Definition: bintext.c:52
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:607
AVIOContext::seekable
int seekable
A combination of AVIO_SEEKABLE_ flags or 0 when the stream is not seekable.
Definition: avio.h:261
height
#define height
Definition: dsp.h:89
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:605
FFInputFormat::p
AVInputFormat p
The public AVInputFormat.
Definition: demux.h:51
avio_r8
int avio_r8(AVIOContext *s)
Definition: aviobuf.c:606
AVPacket::flags
int flags
A combination of AV_PKT_FLAG values.
Definition: packet.h:594
read_header
static int read_header(FFV1Context *f, RangeCoder *c)
Definition: ffv1dec.c:498
avio_internal.h
read_packet
static int read_packet(AVFormatContext *s, AVPacket *pkt)
Definition: bintext.c:368
AVCodecParameters::height
int height
Definition: codec_par.h:135
bintext.h
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:98
init_stream
static AVStream * init_stream(AVFormatContext *s)
Definition: bintext.c:55
ret
ret
Definition: filter_design.txt:187
AVStream
Stream structure.
Definition: avformat.h:744
avio_seek
int64_t avio_seek(AVIOContext *s, int64_t offset, int whence)
fseek() equivalent for AVIOContext.
Definition: aviobuf.c:236
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
Underlying C type is int.
Definition: opt.h:259
Windows::Graphics::DirectX::Direct3D11::p
IDirect3DDxgiInterfaceAccess _COM_Outptr_ void ** p
Definition: vsrc_gfxcapture_winrt.hpp:53
avio_skip
int64_t avio_skip(AVIOContext *s, int64_t offset)
Skip given number of bytes forward.
Definition: aviobuf.c:321
AV_CODEC_ID_XBIN
@ AV_CODEC_ID_XBIN
Definition: codec_id.h:606
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:356
BinDemuxContext
Definition: bintext.c:45
AVMEDIA_TYPE_VIDEO
@ AVMEDIA_TYPE_VIDEO
Definition: avutil.h:200
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:565
sauce.h
FFInputFormat
Definition: demux.h:47
ff_bintext_demuxer
const FFInputFormat ff_bintext_demuxer
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
ffio_read_size
int ffio_read_size(AVIOContext *s, unsigned char *buf, int size)
Read size bytes from AVIOContext into buf.
Definition: aviobuf.c:665
width
#define width
Definition: dsp.h:89
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:237
avio_feof
int avio_feof(AVIOContext *s)
Similar to feof() but also returns nonzero on read errors.
Definition: aviobuf.c:349
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