FFmpeg  4.3.8
swfdec.c
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1 /*
2  * Flash Compatible Streaming Format demuxer
3  * Copyright (c) 2000 Fabrice Bellard
4  * Copyright (c) 2003 Tinic Uro
5  *
6  * This file is part of FFmpeg.
7  *
8  * FFmpeg is free software; you can redistribute it and/or
9  * modify it under the terms of the GNU Lesser General Public
10  * License as published by the Free Software Foundation; either
11  * version 2.1 of the License, or (at your option) any later version.
12  *
13  * FFmpeg is distributed in the hope that it will be useful,
14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16  * Lesser General Public License for more details.
17  *
18  * You should have received a copy of the GNU Lesser General Public
19  * License along with FFmpeg; if not, write to the Free Software
20  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21  */
22 
23 #include "config.h"
24 
25 #if CONFIG_ZLIB
26 #include <zlib.h>
27 #endif
28 
29 #include "libavutil/avassert.h"
31 #include "libavutil/imgutils.h"
32 #include "libavutil/internal.h"
33 #include "libavutil/intreadwrite.h"
34 #include "libavcodec/get_bits.h"
35 #include "swf.h"
36 
37 static const AVCodecTag swf_audio_codec_tags[] = {
38  { AV_CODEC_ID_PCM_S16LE, 0x00 },
39  { AV_CODEC_ID_ADPCM_SWF, 0x01 },
40  { AV_CODEC_ID_MP3, 0x02 },
41  { AV_CODEC_ID_PCM_S16LE, 0x03 },
42 // { AV_CODEC_ID_NELLYMOSER, 0x06 },
43  { AV_CODEC_ID_NONE, 0 },
44 };
45 
46 static int get_swf_tag(AVIOContext *pb, int *len_ptr)
47 {
48  int tag, len;
49 
50  if (avio_feof(pb))
51  return AVERROR_EOF;
52 
53  tag = avio_rl16(pb);
54  len = tag & 0x3f;
55  tag = tag >> 6;
56  if (len == 0x3f) {
57  len = avio_rl32(pb);
58  }
59  *len_ptr = len;
60  return tag;
61 }
62 
63 
64 static int swf_probe(const AVProbeData *p)
65 {
66  GetBitContext gb;
67  int len, xmin, xmax, ymin, ymax;
68 
69  if(p->buf_size < 15)
70  return 0;
71 
72  /* check file header */
73  if ( AV_RB24(p->buf) != AV_RB24("CWS")
74  && AV_RB24(p->buf) != AV_RB24("FWS"))
75  return 0;
76 
77  if ( AV_RB24(p->buf) == AV_RB24("CWS")
78  && p->buf[3] <= 20)
79  return AVPROBE_SCORE_MAX / 4 + 1;
80 
81  if (init_get_bits8(&gb, p->buf + 3, p->buf_size - 3) < 0)
82  return 0;
83 
84  skip_bits(&gb, 40);
85  len = get_bits(&gb, 5);
86  if (!len)
87  return 0;
88  xmin = get_bits_long(&gb, len);
89  xmax = get_bits_long(&gb, len);
90  ymin = get_bits_long(&gb, len);
91  ymax = get_bits_long(&gb, len);
92  if (xmin || ymin || !xmax || !ymax)
93  return 0;
94 
95  if (p->buf[3] >= 20 || xmax < 16 || ymax < 16)
96  return AVPROBE_SCORE_MAX / 4;
97 
98  return AVPROBE_SCORE_EXTENSION + 1;
99 }
100 
101 #if CONFIG_ZLIB
102 static int zlib_refill(void *opaque, uint8_t *buf, int buf_size)
103 {
104  AVFormatContext *s = opaque;
105  SWFContext *swf = s->priv_data;
106  z_stream *z = &swf->zstream;
107  int ret;
108 
109 retry:
110  if (!z->avail_in) {
111  int n = avio_read(s->pb, swf->zbuf_in, ZBUF_SIZE);
112  if (n < 0)
113  return n;
114  z->next_in = swf->zbuf_in;
115  z->avail_in = n;
116  }
117 
118  z->next_out = buf;
119  z->avail_out = buf_size;
120 
121  ret = inflate(z, Z_NO_FLUSH);
122  if (ret == Z_STREAM_END)
123  return AVERROR_EOF;
124  if (ret != Z_OK)
125  return AVERROR(EINVAL);
126 
127  if (buf_size - z->avail_out == 0)
128  goto retry;
129 
130  return buf_size - z->avail_out;
131 }
132 
133 static av_cold int swf_read_close(AVFormatContext *avctx);
134 #endif
135 
137 {
138  SWFContext *swf = s->priv_data;
139  AVIOContext *pb = s->pb;
140  int nbits, len, tag;
141 
142  tag = avio_rb32(pb) & 0xffffff00;
143  avio_rl32(pb);
144 
145  if (tag == MKBETAG('C', 'W', 'S', 0)) {
146  av_log(s, AV_LOG_INFO, "SWF compressed file detected\n");
147 #if CONFIG_ZLIB
148  if (inflateInit(&swf->zstream) != Z_OK) {
149  av_log(s, AV_LOG_ERROR, "Unable to init zlib context\n");
150  return AVERROR(EINVAL);
151  }
152  if (!(swf->zbuf_in = av_malloc(ZBUF_SIZE)) ||
153  !(swf->zbuf_out = av_malloc(ZBUF_SIZE)) ||
154  !(swf->zpb = avio_alloc_context(swf->zbuf_out, ZBUF_SIZE, 0,
155  s, zlib_refill, NULL, NULL))) {
156  swf_read_close(s);
157  return AVERROR(ENOMEM);
158  }
159  swf->zpb->seekable = 0;
160  pb = swf->zpb;
161 #else
162  av_log(s, AV_LOG_ERROR, "zlib support is required to read SWF compressed files\n");
163  return AVERROR(EIO);
164 #endif
165  } else if (tag != MKBETAG('F', 'W', 'S', 0))
166  return AVERROR(EIO);
167  /* skip rectangle size */
168  nbits = avio_r8(pb) >> 3;
169  len = (4 * nbits - 3 + 7) / 8;
170  avio_skip(pb, len);
171  swf->frame_rate = avio_rl16(pb); /* 8.8 fixed */
172  avio_rl16(pb); /* frame count */
173 
174  swf->samples_per_frame = 0;
176  return 0;
177 }
178 
180 {
181  int sample_rate_code, sample_size_code;
182  AVStream *ast = avformat_new_stream(s, NULL);
183  if (!ast)
184  return NULL;
185  ast->id = id;
186  if (info & 1) {
187  ast->codecpar->channels = 2;
189  } else {
190  ast->codecpar->channels = 1;
192  }
194  ast->codecpar->codec_id = ff_codec_get_id(swf_audio_codec_tags, info>>4 & 15);
196  sample_rate_code = info>>2 & 3;
197  sample_size_code = info>>1 & 1;
198  if (!sample_size_code && ast->codecpar->codec_id == AV_CODEC_ID_PCM_S16LE)
200  ast->codecpar->sample_rate = 44100 >> (3 - sample_rate_code);
201  avpriv_set_pts_info(ast, 64, 1, ast->codecpar->sample_rate);
202  return ast;
203 }
204 
206 {
207  SWFContext *swf = s->priv_data;
208  AVIOContext *pb = s->pb;
209  AVStream *vst = NULL, *ast = NULL, *st = 0;
210  int tag, len, i, frame, v, res;
211 
212 #if CONFIG_ZLIB
213  if (swf->zpb)
214  pb = swf->zpb;
215 #endif
216 
217  for(;;) {
218  uint64_t pos = avio_tell(pb);
219  tag = get_swf_tag(pb, &len);
220  if (tag < 0)
221  return tag;
222  if (len < 0) {
223  av_log(s, AV_LOG_ERROR, "invalid tag length: %d\n", len);
224  return AVERROR_INVALIDDATA;
225  }
226  if (tag == TAG_VIDEOSTREAM) {
227  int ch_id = avio_rl16(pb);
228  len -= 2;
229 
230  for (i=0; i<s->nb_streams; i++) {
231  st = s->streams[i];
232  if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO && st->id == ch_id)
233  goto skip;
234  }
235 
236  avio_rl16(pb);
237  avio_rl16(pb);
238  avio_rl16(pb);
239  avio_r8(pb);
240  /* Check for FLV1 */
241  vst = avformat_new_stream(s, NULL);
242  if (!vst)
243  return AVERROR(ENOMEM);
244  vst->id = ch_id;
247  avpriv_set_pts_info(vst, 16, 256, swf->frame_rate);
248  len -= 8;
249  } else if (tag == TAG_STREAMHEAD || tag == TAG_STREAMHEAD2) {
250  /* streaming found */
251 
252  for (i=0; i<s->nb_streams; i++) {
253  st = s->streams[i];
254  if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO && st->id == -1)
255  goto skip;
256  }
257 
258  avio_r8(pb);
259  v = avio_r8(pb);
260  swf->samples_per_frame = avio_rl16(pb);
261  ast = create_new_audio_stream(s, -1, v); /* -1 to avoid clash with video stream ch_id */
262  if (!ast)
263  return AVERROR(ENOMEM);
264  len -= 4;
265  } else if (tag == TAG_DEFINESOUND) {
266  /* audio stream */
267  int ch_id = avio_rl16(pb);
268 
269  for (i=0; i<s->nb_streams; i++) {
270  st = s->streams[i];
271  if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO && st->id == ch_id)
272  goto skip;
273  }
274 
275  // FIXME: The entire audio stream is stored in a single chunk/tag. Normally,
276  // these are smaller audio streams in DEFINESOUND tags, but it's technically
277  // possible they could be huge. Break it up into multiple packets if it's big.
278  v = avio_r8(pb);
279  ast = create_new_audio_stream(s, ch_id, v);
280  if (!ast)
281  return AVERROR(ENOMEM);
282  ast->duration = avio_rl32(pb); // number of samples
283  if (((v>>4) & 15) == 2) { // MP3 sound data record
284  ast->skip_samples = avio_rl16(pb);
285  len -= 2;
286  }
287  len -= 7;
288  if ((res = av_get_packet(pb, pkt, len)) < 0)
289  return res;
290  pkt->pos = pos;
291  pkt->stream_index = ast->index;
292  return pkt->size;
293  } else if (tag == TAG_VIDEOFRAME) {
294  int ch_id = avio_rl16(pb);
295  len -= 2;
296  for(i=0; i<s->nb_streams; i++) {
297  st = s->streams[i];
298  if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO && st->id == ch_id) {
299  frame = avio_rl16(pb);
300  len -= 2;
301  if (len <= 0)
302  goto skip;
303  if ((res = av_get_packet(pb, pkt, len)) < 0)
304  return res;
305  pkt->pos = pos;
306  pkt->pts = frame;
307  pkt->stream_index = st->index;
308  return pkt->size;
309  }
310  }
311  } else if (tag == TAG_DEFINEBITSLOSSLESS || tag == TAG_DEFINEBITSLOSSLESS2) {
312 #if CONFIG_ZLIB
313  long out_len;
314  uint8_t *buf = NULL, *zbuf = NULL, *pal;
315  uint32_t colormap[AVPALETTE_COUNT] = {0};
316  const int alpha_bmp = tag == TAG_DEFINEBITSLOSSLESS2;
317  const int colormapbpp = 3 + alpha_bmp;
318  int linesize, colormapsize = 0;
319 
320  const int ch_id = avio_rl16(pb);
321  const int bmp_fmt = avio_r8(pb);
322  const int width = avio_rl16(pb);
323  const int height = avio_rl16(pb);
324  int pix_fmt;
325 
326  len -= 2+1+2+2;
327 
328  switch (bmp_fmt) {
329  case 3: // PAL-8
330  linesize = width;
331  colormapsize = avio_r8(pb) + 1;
332  len--;
333  break;
334  case 4: // RGB15
335  linesize = width * 2;
336  break;
337  case 5: // RGB24 (0RGB)
338  linesize = width * 4;
339  break;
340  default:
341  av_log(s, AV_LOG_ERROR, "invalid bitmap format %d, skipped\n", bmp_fmt);
342  goto bitmap_end_skip;
343  }
344 
345  linesize = FFALIGN(linesize, 4);
346 
347  if (av_image_check_size(width, height, 0, s) < 0 ||
348  linesize >= INT_MAX / height ||
349  linesize * height >= INT_MAX - colormapsize * colormapbpp) {
350  av_log(s, AV_LOG_ERROR, "invalid frame size %dx%d\n", width, height);
351  goto bitmap_end_skip;
352  }
353 
354  out_len = colormapsize * colormapbpp + linesize * height;
355 
356  ff_dlog(s, "bitmap: ch=%d fmt=%d %dx%d (linesize=%d) len=%d->%ld pal=%d\n",
357  ch_id, bmp_fmt, width, height, linesize, len, out_len, colormapsize);
358 
359  zbuf = av_malloc(len);
360  buf = av_malloc(out_len);
361  if (!zbuf || !buf) {
362  res = AVERROR(ENOMEM);
363  goto bitmap_end;
364  }
365 
366  len = avio_read(pb, zbuf, len);
367  if (len < 0 || (res = uncompress(buf, &out_len, zbuf, len)) != Z_OK) {
368  av_log(s, AV_LOG_WARNING, "Failed to uncompress one bitmap\n");
369  goto bitmap_end_skip;
370  }
371 
372  for (i = 0; i < s->nb_streams; i++) {
373  st = s->streams[i];
374  if (st->codecpar->codec_id == AV_CODEC_ID_RAWVIDEO && st->id == -3)
375  break;
376  }
377  if (i == s->nb_streams) {
378  vst = avformat_new_stream(s, NULL);
379  if (!vst) {
380  res = AVERROR(ENOMEM);
381  goto bitmap_end;
382  }
383  vst->id = -3; /* -3 to avoid clash with video stream and audio stream */
386  avpriv_set_pts_info(vst, 64, 256, swf->frame_rate);
387  st = vst;
388  }
389 
390  if ((res = av_new_packet(pkt, out_len - colormapsize * colormapbpp)) < 0)
391  goto bitmap_end;
392  if (!st->codecpar->width && !st->codecpar->height) {
393  st->codecpar->width = width;
394  st->codecpar->height = height;
395  } else {
396  ff_add_param_change(pkt, 0, 0, 0, width, height);
397  }
398  pkt->pos = pos;
399  pkt->stream_index = st->index;
400 
401  if (linesize * height > pkt->size) {
402  res = AVERROR_INVALIDDATA;
403  goto bitmap_end;
404  }
405 
406  switch (bmp_fmt) {
407  case 3:
408  pix_fmt = AV_PIX_FMT_PAL8;
409  for (i = 0; i < colormapsize; i++)
410  if (alpha_bmp) colormap[i] = buf[3]<<24 | AV_RB24(buf + 4*i);
411  else colormap[i] = 0xffU <<24 | AV_RB24(buf + 3*i);
413  if (!pal) {
414  res = AVERROR(ENOMEM);
415  goto bitmap_end;
416  }
417  memcpy(pal, colormap, AVPALETTE_SIZE);
418  break;
419  case 4:
420  pix_fmt = AV_PIX_FMT_RGB555;
421  break;
422  case 5:
423  pix_fmt = alpha_bmp ? AV_PIX_FMT_ARGB : AV_PIX_FMT_0RGB;
424  break;
425  default:
426  av_assert0(0);
427  }
428  if (st->codecpar->format != AV_PIX_FMT_NONE && st->codecpar->format != pix_fmt) {
429  av_log(s, AV_LOG_ERROR, "pixel format change unsupported\n");
430  } else
431  st->codecpar->format = pix_fmt;
432 
433  memcpy(pkt->data, buf + colormapsize*colormapbpp, linesize * height);
434 
435  res = pkt->size;
436 
437 bitmap_end:
438  av_freep(&zbuf);
439  av_freep(&buf);
440  return res;
441 bitmap_end_skip:
442  av_freep(&zbuf);
443  av_freep(&buf);
444 #else
445  av_log(s, AV_LOG_ERROR, "this file requires zlib support compiled in\n");
446 #endif
447  } else if (tag == TAG_STREAMBLOCK) {
448  for (i = 0; i < s->nb_streams; i++) {
449  st = s->streams[i];
450  if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO && st->id == -1) {
451  if (st->codecpar->codec_id == AV_CODEC_ID_MP3) {
452  avio_skip(pb, 4);
453  len -= 4;
454  if (len <= 0)
455  goto skip;
456  if ((res = av_get_packet(pb, pkt, len)) < 0)
457  return res;
458  } else { // ADPCM, PCM
459  if (len <= 0)
460  goto skip;
461  if ((res = av_get_packet(pb, pkt, len)) < 0)
462  return res;
463  }
464  pkt->pos = pos;
465  pkt->stream_index = st->index;
466  return pkt->size;
467  }
468  }
469  } else if (tag == TAG_JPEG2) {
470  for (i=0; i<s->nb_streams; i++) {
471  st = s->streams[i];
472  if (st->codecpar->codec_id == AV_CODEC_ID_MJPEG && st->id == -2)
473  break;
474  }
475  if (i == s->nb_streams) {
476  vst = avformat_new_stream(s, NULL);
477  if (!vst)
478  return AVERROR(ENOMEM);
479  vst->id = -2; /* -2 to avoid clash with video stream and audio stream */
482  avpriv_set_pts_info(vst, 64, 256, swf->frame_rate);
483  st = vst;
484  }
485  avio_rl16(pb); /* BITMAP_ID */
486  len -= 2;
487  if (len < 4)
488  goto skip;
489  if ((res = av_new_packet(pkt, len)) < 0)
490  return res;
491  if (avio_read(pb, pkt->data, 4) != 4) {
492  return AVERROR_INVALIDDATA;
493  }
494  if (AV_RB32(pkt->data) == 0xffd8ffd9 ||
495  AV_RB32(pkt->data) == 0xffd9ffd8) {
496  /* old SWF files containing SOI/EOI as data start */
497  /* files created by swink have reversed tag */
498  pkt->size -= 4;
499  memset(pkt->data+pkt->size, 0, 4);
500  res = avio_read(pb, pkt->data, pkt->size);
501  } else {
502  res = avio_read(pb, pkt->data + 4, pkt->size - 4);
503  if (res >= 0)
504  res += 4;
505  }
506  if (res != pkt->size) {
507  if (res < 0) {
508  return res;
509  }
510  av_shrink_packet(pkt, res);
511  }
512 
513  pkt->pos = pos;
514  pkt->stream_index = st->index;
515  return pkt->size;
516  } else {
517  av_log(s, AV_LOG_DEBUG, "Unknown tag: %d\n", tag);
518  }
519  skip:
520  if(len<0)
521  av_log(s, AV_LOG_WARNING, "Clipping len %d\n", len);
522  len = FFMAX(0, len);
523  avio_skip(pb, len);
524  }
525 }
526 
527 #if CONFIG_ZLIB
528 static av_cold int swf_read_close(AVFormatContext *avctx)
529 {
530  SWFContext *s = avctx->priv_data;
531  inflateEnd(&s->zstream);
532  av_freep(&s->zbuf_in);
533  av_freep(&s->zbuf_out);
534  avio_context_free(&s->zpb);
535  return 0;
536 }
537 #endif
538 
540  .name = "swf",
541  .long_name = NULL_IF_CONFIG_SMALL("SWF (ShockWave Flash)"),
542  .priv_data_size = sizeof(SWFContext),
546 #if CONFIG_ZLIB
547  .read_close = swf_read_close,
548 #endif
549 };
const AVCodecTag ff_swf_codec_tags[]
Definition: swf.c:25
#define NULL
Definition: coverity.c:32
Bytestream IO Context.
Definition: avio.h:161
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
static enum AVPixelFormat pix_fmt
static int get_swf_tag(AVIOContext *pb, int *len_ptr)
Definition: swfdec.c:46
enum AVCodecID ff_codec_get_id(const AVCodecTag *tags, unsigned int tag)
Definition: utils.c:3165
misc image utilities
static unsigned int get_bits(GetBitContext *s, int n)
Read 1-25 bits.
Definition: get_bits.h:379
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:182
int64_t pos
byte position in stream, -1 if unknown
Definition: packet.h:375
void av_shrink_packet(AVPacket *pkt, int size)
Reduce packet size, correctly zeroing padding.
Definition: avpacket.c:103
void avpriv_set_pts_info(AVStream *s, int pts_wrap_bits, unsigned int pts_num, unsigned int pts_den)
Set the time base and wrapping info for a given stream.
Definition: utils.c:4948
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
Definition: codec_par.h:60
int size
Definition: packet.h:356
#define AV_RB24
Definition: intreadwrite.h:64
int64_t avio_skip(AVIOContext *s, int64_t offset)
Skip given number of bytes forward.
Definition: aviobuf.c:329
static AVPacket pkt
#define AV_CH_LAYOUT_STEREO
int ctx_flags
Flags signalling stream properties.
Definition: avformat.h:1400
Format I/O context.
Definition: avformat.h:1351
#define av_assert0(cond)
assert() equivalent, that is always enabled.
Definition: avassert.h:37
int frame_rate
Definition: swf.h:131
uint8_t
#define av_cold
Definition: attributes.h:88
#define av_malloc(s)
int width
Video only.
Definition: codec_par.h:126
#define AVFMTCTX_NOHEADER
signal that no header is present (streams are added dynamically)
Definition: avformat.h:1295
8 bits with AV_PIX_FMT_RGB32 palette
Definition: pixfmt.h:77
unsigned int avio_rb32(AVIOContext *s)
Definition: aviobuf.c:778
#define AVPALETTE_SIZE
Definition: pixfmt.h:32
#define AV_RB32
Definition: intreadwrite.h:130
enum AVStreamParseType need_parsing
Definition: avformat.h:1094
int id
Format-specific stream ID.
Definition: avformat.h:883
AVStream * avformat_new_stream(AVFormatContext *s, const AVCodec *c)
Add a new stream to a media file.
Definition: utils.c:4526
AVStream ** streams
A list of all streams in the file.
Definition: avformat.h:1419
static AVFrame * frame
#define height
uint8_t * data
Definition: packet.h:355
uint32_t tag
Definition: movenc.c:1532
#define ff_dlog(a,...)
#define AVERROR_EOF
End of file.
Definition: error.h:55
bitstream reader API header.
static av_cold int read_close(AVFormatContext *ctx)
Definition: libcdio.c:145
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:307
static av_always_inline int64_t avio_tell(AVIOContext *s)
ftell() equivalent for AVIOContext.
Definition: avio.h:557
#define FFALIGN(x, a)
Definition: macros.h:48
uint64_t channel_layout
Audio only.
Definition: codec_par.h:162
#define av_log(a,...)
int avio_read(AVIOContext *s, unsigned char *buf, int size)
Read size bytes from AVIOContext into buf.
Definition: aviobuf.c:625
#define U(x)
Definition: vp56_arith.h:37
int av_new_packet(AVPacket *pkt, int size)
Allocate the payload of a packet and initialize its fields with default values.
Definition: avpacket.c:88
AVIOContext * avio_alloc_context(unsigned char *buffer, int buffer_size, int write_flag, void *opaque, int(*read_packet)(void *opaque, uint8_t *buf, int buf_size), int(*write_packet)(void *opaque, uint8_t *buf, int buf_size), int64_t(*seek)(void *opaque, int64_t offset, int whence))
Allocate and initialize an AVIOContext for buffered I/O.
Definition: aviobuf.c:126
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:269
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
AVInputFormat ff_swf_demuxer
Definition: swfdec.c:539
An AV_PKT_DATA_PALETTE side data packet contains exactly AVPALETTE_SIZE bytes worth of palette...
Definition: packet.h:46
unsigned int avio_rl32(AVIOContext *s)
Definition: aviobuf.c:747
#define AVERROR(e)
Definition: error.h:43
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
Definition: internal.h:188
unsigned int pos
Definition: spdifenc.c:412
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
Definition: log.h:197
preferred ID for decoding MPEG audio layer 1, 2 or 3
Definition: codec_id.h:411
enum AVMediaType codec_type
General type of the encoded data.
Definition: codec_par.h:56
int ff_add_param_change(AVPacket *pkt, int32_t channels, uint64_t channel_layout, int32_t sample_rate, int32_t width, int32_t height)
Add side data to a packet for changing parameters to the given values.
Definition: utils.c:5080
simple assert() macros that are a bit more flexible than ISO C assert().
#define CONFIG_ZLIB
Definition: config.h:523
#define FFMAX(a, b)
Definition: common.h:94
packed ARGB 8:8:8:8, 32bpp, ARGBARGB...
Definition: pixfmt.h:92
int avio_r8(AVIOContext *s)
Definition: aviobuf.c:616
int buf_size
Size of buf except extra allocated bytes.
Definition: avformat.h:444
unsigned char * buf
Buffer must have AVPROBE_PADDING_SIZE of extra allocated bytes filled with zero.
Definition: avformat.h:443
common internal API header
unsigned int nb_streams
Number of elements in AVFormatContext.streams.
Definition: avformat.h:1407
Definition: swf.h:62
int samples_per_frame
Definition: swf.h:127
int av_image_check_size(unsigned int w, unsigned int h, int log_offset, void *log_ctx)
Check if the given dimension of an image is valid, meaning that all bytes of the image can be address...
Definition: imgutils.c:282
audio channel layout utility functions
static const AVCodecTag swf_audio_codec_tags[]
Definition: swfdec.c:37
#define width
#define s(width, name)
Definition: cbs_vp9.c:257
static int swf_probe(const AVProbeData *p)
Definition: swfdec.c:64
static AVStream * create_new_audio_stream(AVFormatContext *s, int id, int info)
Definition: swfdec.c:179
static int swf_read_header(AVFormatContext *s)
Definition: swfdec.c:136
static int read_header(FFV1Context *f)
Definition: ffv1dec.c:545
Stream structure.
Definition: avformat.h:876
static int read_packet(void *opaque, uint8_t *buf, int buf_size)
Definition: avio_reading.c:42
#define AV_LOG_INFO
Standard information.
Definition: log.h:187
AVIOContext * pb
I/O context.
Definition: avformat.h:1393
static int init_get_bits8(GetBitContext *s, const uint8_t *buffer, int byte_size)
Initialize GetBitContext.
Definition: get_bits.h:677
static void skip_bits(GetBitContext *s, int n)
Definition: get_bits.h:467
static void inflate(uint8_t *dst, const uint8_t *p1, int width, int threshold, const uint8_t *coordinates[], int coord, int maxc)
Definition: vf_neighbor.c:198
#define AVPROBE_SCORE_EXTENSION
score for file extension
Definition: avformat.h:451
This structure contains the data a format has to probe a file.
Definition: avformat.h:441
static unsigned int get_bits_long(GetBitContext *s, int n)
Read 0-32 bits.
Definition: get_bits.h:546
#define AVPALETTE_COUNT
Definition: pixfmt.h:33
static int read_probe(const AVProbeData *pd)
Definition: jvdec.c:55
int sample_rate
Audio only.
Definition: codec_par.h:170
#define AVPROBE_SCORE_MAX
maximum score
Definition: avformat.h:453
static int swf_read_packet(AVFormatContext *s, AVPacket *pkt)
Definition: swfdec.c:205
full parsing and repack
Definition: avformat.h:795
unsigned int avio_rl16(AVIOContext *s)
Definition: aviobuf.c:731
void avio_context_free(AVIOContext **s)
Free the supplied IO context and everything associated with it.
Definition: aviobuf.c:143
#define AV_PIX_FMT_RGB555
Definition: pixfmt.h:385
#define MKBETAG(a, b, c, d)
Definition: common.h:407
int len
void * priv_data
Format private data.
Definition: avformat.h:1379
int channels
Audio only.
Definition: codec_par.h:166
#define av_freep(p)
const char * name
A comma separated list of short names for the format.
Definition: avformat.h:650
AVCodecParameters * codecpar
Codec parameters associated with this stream.
Definition: avformat.h:1023
int avio_feof(AVIOContext *s)
Similar to feof() but also returns nonzero on read errors.
Definition: aviobuf.c:356
uint8_t * av_packet_new_side_data(AVPacket *pkt, enum AVPacketSideDataType type, int size)
Allocate new information of a packet.
Definition: avpacket.c:332
int stream_index
Definition: packet.h:357
#define AV_CH_LAYOUT_MONO
packed RGB 8:8:8, 32bpp, XRGBXRGB... X=unused/undefined
Definition: pixfmt.h:237
enum AVCodecID id
This structure stores compressed data.
Definition: packet.h:332
int64_t pts
Presentation timestamp in AVStream->time_base units; the time at which the decompressed packet will b...
Definition: packet.h:348