FFmpeg  4.4.5
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 #include "flv.h"
37 
38 typedef struct SWFDecContext {
41 #if CONFIG_ZLIB
42 #define ZBUF_SIZE 4096
43  AVIOContext *zpb;
44  uint8_t *zbuf_in;
45  uint8_t *zbuf_out;
46  z_stream zstream;
47 #endif
49 
50 static const AVCodecTag swf_audio_codec_tags[] = {
51  { AV_CODEC_ID_PCM_S16LE, 0x00 },
52  { AV_CODEC_ID_ADPCM_SWF, 0x01 },
53  { AV_CODEC_ID_MP3, 0x02 },
54  { AV_CODEC_ID_PCM_S16LE, 0x03 },
55 // { AV_CODEC_ID_NELLYMOSER, 0x06 },
56  { AV_CODEC_ID_NONE, 0 },
57 };
58 
59 static int get_swf_tag(AVIOContext *pb, int *len_ptr)
60 {
61  int tag, len;
62 
63  if (avio_feof(pb))
64  return AVERROR_EOF;
65 
66  tag = avio_rl16(pb);
67  len = tag & 0x3f;
68  tag = tag >> 6;
69  if (len == 0x3f) {
70  len = avio_rl32(pb);
71  }
72  *len_ptr = len;
73  return tag;
74 }
75 
76 
77 static int swf_probe(const AVProbeData *p)
78 {
79  GetBitContext gb;
80  int len, xmin, xmax, ymin, ymax;
81 
82  if(p->buf_size < 15)
83  return 0;
84 
85  /* check file header */
86  if ( AV_RB24(p->buf) != AV_RB24("CWS")
87  && AV_RB24(p->buf) != AV_RB24("FWS"))
88  return 0;
89 
90  if ( AV_RB24(p->buf) == AV_RB24("CWS")
91  && p->buf[3] <= 20)
92  return AVPROBE_SCORE_MAX / 4 + 1;
93 
94  if (init_get_bits8(&gb, p->buf + 8, p->buf_size - 8) < 0)
95  return 0;
96 
97  len = get_bits(&gb, 5);
98  if (!len)
99  return 0;
100  xmin = get_bits_long(&gb, len);
101  xmax = get_bits_long(&gb, len);
102  ymin = get_bits_long(&gb, len);
103  ymax = get_bits_long(&gb, len);
104  if (xmin || ymin || !xmax || !ymax)
105  return 0;
106 
107  if (p->buf[3] >= 20 || xmax < 16 || ymax < 16)
108  return AVPROBE_SCORE_MAX / 4;
109 
110  return AVPROBE_SCORE_EXTENSION + 1;
111 }
112 
113 #if CONFIG_ZLIB
114 static int zlib_refill(void *opaque, uint8_t *buf, int buf_size)
115 {
116  AVFormatContext *s = opaque;
117  SWFDecContext *swf = s->priv_data;
118  z_stream *z = &swf->zstream;
119  int ret;
120 
121 retry:
122  if (!z->avail_in) {
123  int n = avio_read(s->pb, swf->zbuf_in, ZBUF_SIZE);
124  if (n < 0)
125  return n;
126  z->next_in = swf->zbuf_in;
127  z->avail_in = n;
128  }
129 
130  z->next_out = buf;
131  z->avail_out = buf_size;
132 
133  ret = inflate(z, Z_NO_FLUSH);
134  if (ret == Z_STREAM_END)
135  return AVERROR_EOF;
136  if (ret != Z_OK)
137  return AVERROR(EINVAL);
138 
139  if (buf_size - z->avail_out == 0)
140  goto retry;
141 
142  return buf_size - z->avail_out;
143 }
144 
145 static av_cold int swf_read_close(AVFormatContext *avctx);
146 #endif
147 
149 {
150  SWFDecContext *swf = s->priv_data;
151  AVIOContext *pb = s->pb;
152  int nbits, len, tag;
153 
154  tag = avio_rb32(pb) & 0xffffff00;
155  avio_rl32(pb);
156 
157  if (tag == MKBETAG('C', 'W', 'S', 0)) {
158  av_log(s, AV_LOG_INFO, "SWF compressed file detected\n");
159 #if CONFIG_ZLIB
160  if (inflateInit(&swf->zstream) != Z_OK) {
161  av_log(s, AV_LOG_ERROR, "Unable to init zlib context\n");
162  return AVERROR(EINVAL);
163  }
164  if (!(swf->zbuf_in = av_malloc(ZBUF_SIZE)) ||
165  !(swf->zbuf_out = av_malloc(ZBUF_SIZE)) ||
166  !(swf->zpb = avio_alloc_context(swf->zbuf_out, ZBUF_SIZE, 0,
167  s, zlib_refill, NULL, NULL))) {
168  swf_read_close(s);
169  return AVERROR(ENOMEM);
170  }
171  swf->zpb->seekable = 0;
172  pb = swf->zpb;
173 #else
174  av_log(s, AV_LOG_ERROR, "zlib support is required to read SWF compressed files\n");
175  return AVERROR(EIO);
176 #endif
177  } else if (tag != MKBETAG('F', 'W', 'S', 0))
178  return AVERROR(EIO);
179  /* skip rectangle size */
180  nbits = avio_r8(pb) >> 3;
181  len = (4 * nbits - 3 + 7) / 8;
182  avio_skip(pb, len);
183  swf->frame_rate = avio_rl16(pb); /* 8.8 fixed */
184  avio_rl16(pb); /* frame count */
185 
186  swf->samples_per_frame = 0;
187  s->ctx_flags |= AVFMTCTX_NOHEADER;
188  return 0;
189 }
190 
192 {
193  int sample_rate_code, sample_size_code;
195  if (!ast)
196  return NULL;
197  ast->id = id;
198  if (info & 1) {
199  ast->codecpar->channels = 2;
201  } else {
202  ast->codecpar->channels = 1;
204  }
206  ast->codecpar->codec_id = ff_codec_get_id(swf_audio_codec_tags, info>>4 & 15);
208  sample_rate_code = info>>2 & 3;
209  sample_size_code = info>>1 & 1;
210  if (!sample_size_code && ast->codecpar->codec_id == AV_CODEC_ID_PCM_S16LE)
212  ast->codecpar->sample_rate = 44100 >> (3 - sample_rate_code);
213  avpriv_set_pts_info(ast, 64, 1, ast->codecpar->sample_rate);
214  return ast;
215 }
216 
218 {
219  SWFDecContext *swf = s->priv_data;
220  AVIOContext *pb = s->pb;
221  AVStream *vst = NULL, *ast = NULL, *st = 0;
222  int tag, len, i, frame, v, res;
223 
224 #if CONFIG_ZLIB
225  if (swf->zpb)
226  pb = swf->zpb;
227 #endif
228 
229  for(;;) {
230  uint64_t pos = avio_tell(pb);
231  tag = get_swf_tag(pb, &len);
232  if (tag < 0)
233  return tag;
234  if (len < 0) {
235  av_log(s, AV_LOG_ERROR, "invalid tag length: %d\n", len);
236  return AVERROR_INVALIDDATA;
237  }
238  if (tag == TAG_VIDEOSTREAM) {
239  int ch_id = avio_rl16(pb);
240  len -= 2;
241 
242  for (i=0; i<s->nb_streams; i++) {
243  st = s->streams[i];
244  if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO && st->id == ch_id)
245  goto skip;
246  }
247 
248  avio_rl16(pb);
249  avio_rl16(pb);
250  avio_rl16(pb);
251  avio_r8(pb);
252  /* Check for FLV1 */
253  vst = avformat_new_stream(s, NULL);
254  if (!vst)
255  return AVERROR(ENOMEM);
256  vst->id = ch_id;
259  avpriv_set_pts_info(vst, 16, 256, swf->frame_rate);
260  len -= 8;
261  } else if (tag == TAG_STREAMHEAD || tag == TAG_STREAMHEAD2) {
262  /* streaming found */
263 
264  for (i=0; i<s->nb_streams; i++) {
265  st = s->streams[i];
266  if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO && st->id == -1)
267  goto skip;
268  }
269 
270  avio_r8(pb);
271  v = avio_r8(pb);
272  swf->samples_per_frame = avio_rl16(pb);
273  ast = create_new_audio_stream(s, -1, v); /* -1 to avoid clash with video stream ch_id */
274  if (!ast)
275  return AVERROR(ENOMEM);
276  len -= 4;
277  } else if (tag == TAG_DEFINESOUND) {
278  /* audio stream */
279  int ch_id = avio_rl16(pb);
280 
281  for (i=0; i<s->nb_streams; i++) {
282  st = s->streams[i];
283  if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO && st->id == ch_id)
284  goto skip;
285  }
286 
287  // FIXME: The entire audio stream is stored in a single chunk/tag. Normally,
288  // these are smaller audio streams in DEFINESOUND tags, but it's technically
289  // possible they could be huge. Break it up into multiple packets if it's big.
290  v = avio_r8(pb);
291  ast = create_new_audio_stream(s, ch_id, v);
292  if (!ast)
293  return AVERROR(ENOMEM);
294  ast->duration = avio_rl32(pb); // number of samples
295  if (((v>>4) & 15) == 2) { // MP3 sound data record
296  ast->internal->skip_samples = avio_rl16(pb);
297  len -= 2;
298  }
299  len -= 7;
300  if ((res = av_get_packet(pb, pkt, len)) < 0)
301  return res;
302  pkt->pos = pos;
303  pkt->stream_index = ast->index;
304  return pkt->size;
305  } else if (tag == TAG_VIDEOFRAME) {
306  int ch_id = avio_rl16(pb);
307  len -= 2;
308  for(i=0; i<s->nb_streams; i++) {
309  st = s->streams[i];
310  if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO && st->id == ch_id) {
311  int pkt_flags = 0;
312  frame = avio_rl16(pb);
313  len -= 2;
314  if (len <= 0)
315  goto skip;
316  if (st->codecpar->codec_id == AV_CODEC_ID_FLASHSV) {
317  unsigned flags = avio_r8(pb);
318  len--;
319  if (len <= 0)
320  goto skip;
322  }
323  if ((res = av_get_packet(pb, pkt, len)) < 0)
324  return res;
325  pkt->pos = pos;
326  pkt->pts = frame;
327  pkt->stream_index = st->index;
328  pkt->flags |= pkt_flags;
329  return pkt->size;
330  }
331  }
333 #if CONFIG_ZLIB
334  long out_len;
335  uint8_t *buf = NULL, *zbuf = NULL, *pal;
336  uint32_t colormap[AVPALETTE_COUNT] = {0};
337  const int alpha_bmp = tag == TAG_DEFINEBITSLOSSLESS2;
338  const int colormapbpp = 3 + alpha_bmp;
339  int linesize, colormapsize = 0;
340 
341  const int ch_id = avio_rl16(pb);
342  const int bmp_fmt = avio_r8(pb);
343  const int width = avio_rl16(pb);
344  const int height = avio_rl16(pb);
345  int pix_fmt;
346 
347  len -= 2+1+2+2;
348 
349  switch (bmp_fmt) {
350  case 3: // PAL-8
351  linesize = width;
352  colormapsize = avio_r8(pb) + 1;
353  len--;
354  break;
355  case 4: // RGB15
356  linesize = width * 2;
357  break;
358  case 5: // RGB24 (0RGB)
359  linesize = width * 4;
360  break;
361  default:
362  av_log(s, AV_LOG_ERROR, "invalid bitmap format %d, skipped\n", bmp_fmt);
363  goto bitmap_end_skip;
364  }
365 
366  linesize = FFALIGN(linesize, 4);
367 
368  if (av_image_check_size(width, height, 0, s) < 0 ||
369  linesize >= INT_MAX / height ||
370  linesize * height >= INT_MAX - colormapsize * colormapbpp) {
371  av_log(s, AV_LOG_ERROR, "invalid frame size %dx%d\n", width, height);
372  goto bitmap_end_skip;
373  }
374 
375  out_len = colormapsize * colormapbpp + linesize * height;
376 
377  ff_dlog(s, "bitmap: ch=%d fmt=%d %dx%d (linesize=%d) len=%d->%ld pal=%d\n",
378  ch_id, bmp_fmt, width, height, linesize, len, out_len, colormapsize);
379 
380  if (len * 17373LL < out_len)
381  goto bitmap_end_skip;
382 
383  zbuf = av_malloc(len);
384  if (!zbuf) {
385  res = AVERROR(ENOMEM);
386  goto bitmap_end;
387  }
388 
389  len = avio_read(pb, zbuf, len);
390  if (len < 0)
391  goto bitmap_end_skip;
392 
393  buf = av_malloc(out_len);
394  if (!buf) {
395  res = AVERROR(ENOMEM);
396  goto bitmap_end;
397  }
398  if ((res = uncompress(buf, &out_len, zbuf, len)) != Z_OK) {
399  av_log(s, AV_LOG_WARNING, "Failed to uncompress one bitmap\n");
400  goto bitmap_end_skip;
401  }
402 
403  for (i = 0; i < s->nb_streams; i++) {
404  st = s->streams[i];
405  if (st->codecpar->codec_id == AV_CODEC_ID_RAWVIDEO && st->id == -3)
406  break;
407  }
408  if (i == s->nb_streams) {
409  vst = avformat_new_stream(s, NULL);
410  if (!vst) {
411  res = AVERROR(ENOMEM);
412  goto bitmap_end;
413  }
414  vst->id = -3; /* -3 to avoid clash with video stream and audio stream */
417  avpriv_set_pts_info(vst, 64, 256, swf->frame_rate);
418  st = vst;
419  }
420 
421  if ((res = av_new_packet(pkt, out_len - colormapsize * colormapbpp)) < 0)
422  goto bitmap_end;
423  if (!st->codecpar->width && !st->codecpar->height) {
424  st->codecpar->width = width;
425  st->codecpar->height = height;
426  } else {
427  ff_add_param_change(pkt, 0, 0, 0, width, height);
428  }
429  pkt->pos = pos;
430  pkt->stream_index = st->index;
431 
432  if (linesize * height > pkt->size) {
433  res = AVERROR_INVALIDDATA;
434  goto bitmap_end;
435  }
436 
437  switch (bmp_fmt) {
438  case 3:
440  for (i = 0; i < colormapsize; i++)
441  if (alpha_bmp) colormap[i] = buf[3]<<24 | AV_RB24(buf + 4*i);
442  else colormap[i] = 0xffU <<24 | AV_RB24(buf + 3*i);
444  if (!pal) {
445  res = AVERROR(ENOMEM);
446  goto bitmap_end;
447  }
448  memcpy(pal, colormap, AVPALETTE_SIZE);
449  break;
450  case 4:
452  break;
453  case 5:
454  pix_fmt = alpha_bmp ? AV_PIX_FMT_ARGB : AV_PIX_FMT_0RGB;
455  break;
456  default:
457  av_assert0(0);
458  }
459  if (st->codecpar->format != AV_PIX_FMT_NONE && st->codecpar->format != pix_fmt) {
460  av_log(s, AV_LOG_ERROR, "pixel format change unsupported\n");
461  } else
462  st->codecpar->format = pix_fmt;
463 
464  memcpy(pkt->data, buf + colormapsize*colormapbpp, linesize * height);
465 
466  res = pkt->size;
467 
468 bitmap_end:
469  av_freep(&zbuf);
470  av_freep(&buf);
471  return res;
472 bitmap_end_skip:
473  av_freep(&zbuf);
474  av_freep(&buf);
475 #else
476  av_log(s, AV_LOG_ERROR, "this file requires zlib support compiled in\n");
477 #endif
478  } else if (tag == TAG_STREAMBLOCK) {
479  for (i = 0; i < s->nb_streams; i++) {
480  st = s->streams[i];
481  if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO && st->id == -1) {
482  if (st->codecpar->codec_id == AV_CODEC_ID_MP3) {
483  avio_skip(pb, 4);
484  len -= 4;
485  if (len <= 0)
486  goto skip;
487  if ((res = av_get_packet(pb, pkt, len)) < 0)
488  return res;
489  } else { // ADPCM, PCM
490  if (len <= 0)
491  goto skip;
492  if ((res = av_get_packet(pb, pkt, len)) < 0)
493  return res;
494  }
495  pkt->pos = pos;
496  pkt->stream_index = st->index;
497  return pkt->size;
498  }
499  }
500  } else if (tag == TAG_JPEG2) {
501  for (i=0; i<s->nb_streams; i++) {
502  st = s->streams[i];
503  if (st->codecpar->codec_id == AV_CODEC_ID_MJPEG && st->id == -2)
504  break;
505  }
506  if (i == s->nb_streams) {
507  vst = avformat_new_stream(s, NULL);
508  if (!vst)
509  return AVERROR(ENOMEM);
510  vst->id = -2; /* -2 to avoid clash with video stream and audio stream */
513  avpriv_set_pts_info(vst, 64, 256, swf->frame_rate);
514  st = vst;
515  }
516  avio_rl16(pb); /* BITMAP_ID */
517  len -= 2;
518  if (len < 4)
519  goto skip;
520  if ((res = av_new_packet(pkt, len)) < 0)
521  return res;
522  if (avio_read(pb, pkt->data, 4) != 4) {
523  return AVERROR_INVALIDDATA;
524  }
525  if (AV_RB32(pkt->data) == 0xffd8ffd9 ||
526  AV_RB32(pkt->data) == 0xffd9ffd8) {
527  /* old SWF files containing SOI/EOI as data start */
528  /* files created by swink have reversed tag */
529  pkt->size -= 4;
530  memset(pkt->data+pkt->size, 0, 4);
531  res = avio_read(pb, pkt->data, pkt->size);
532  } else {
533  res = avio_read(pb, pkt->data + 4, pkt->size - 4);
534  if (res >= 0)
535  res += 4;
536  }
537  if (res != pkt->size) {
538  if (res < 0) {
539  return res;
540  }
541  av_shrink_packet(pkt, res);
542  }
543 
544  pkt->pos = pos;
545  pkt->stream_index = st->index;
546  return pkt->size;
547  } else {
548  av_log(s, AV_LOG_DEBUG, "Unknown tag: %d\n", tag);
549  }
550  skip:
551  if(len<0)
552  av_log(s, AV_LOG_WARNING, "Clipping len %d\n", len);
553  len = FFMAX(0, len);
554  avio_skip(pb, len);
555  }
556 }
557 
558 #if CONFIG_ZLIB
559 static av_cold int swf_read_close(AVFormatContext *avctx)
560 {
561  SWFDecContext *s = avctx->priv_data;
562  inflateEnd(&s->zstream);
563  av_freep(&s->zbuf_in);
564  av_freep(&s->zbuf_out);
565  avio_context_free(&s->zpb);
566  return 0;
567 }
568 #endif
569 
571  .name = "swf",
572  .long_name = NULL_IF_CONFIG_SMALL("SWF (ShockWave Flash)"),
573  .priv_data_size = sizeof(SWFDecContext),
577 #if CONFIG_ZLIB
578  .read_close = swf_read_close,
579 #endif
580 };
#define av_cold
Definition: attributes.h:88
uint8_t
simple assert() macros that are a bit more flexible than ISO C assert().
#define av_assert0(cond)
assert() equivalent, that is always enabled.
Definition: avassert.h:37
#define AVPROBE_SCORE_MAX
maximum score
Definition: avformat.h:453
#define AVFMTCTX_NOHEADER
signal that no header is present (streams are added dynamically)
Definition: avformat.h:1177
#define AVPROBE_SCORE_EXTENSION
score for file extension
Definition: avformat.h:451
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:310
@ AVSTREAM_PARSE_FULL
full parsing and repack
Definition: avformat.h:794
int avio_feof(AVIOContext *s)
Similar to feof() but also returns nonzero on read errors.
Definition: aviobuf.c:364
static av_always_inline int64_t avio_tell(AVIOContext *s)
ftell() equivalent for AVIOContext.
Definition: avio.h:557
unsigned int avio_rl16(AVIOContext *s)
Definition: aviobuf.c:734
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:138
int64_t avio_skip(AVIOContext *s, int64_t offset)
Skip given number of bytes forward.
Definition: aviobuf.c:337
int avio_read(AVIOContext *s, unsigned char *buf, int size)
Read size bytes from AVIOContext into buf.
Definition: aviobuf.c:633
unsigned int avio_rl32(AVIOContext *s)
Definition: aviobuf.c:750
void avio_context_free(AVIOContext **s)
Free the supplied IO context and everything associated with it.
Definition: aviobuf.c:155
unsigned int avio_rb32(AVIOContext *s)
Definition: aviobuf.c:781
int avio_r8(AVIOContext *s)
Definition: aviobuf.c:624
static int read_packet(void *opaque, uint8_t *buf, int buf_size)
Definition: avio_reading.c:42
uint8_t * av_packet_new_side_data(AVPacket *pkt, enum AVPacketSideDataType type, buffer_size_t size)
Definition: avpacket.c:343
#define AV_RB24
Definition: intreadwrite.h:64
#define AV_RB32
Definition: intreadwrite.h:130
#define flags(name, subs,...)
Definition: cbs_av1.c:572
#define s(width, name)
Definition: cbs_vp9.c:257
audio channel layout utility functions
#define MKBETAG(a, b, c, d)
Definition: common.h:479
#define FFMAX(a, b)
Definition: common.h:103
#define CONFIG_ZLIB
Definition: config.h:530
#define NULL
Definition: coverity.c:32
static enum AVPixelFormat pix_fmt
static AVFrame * frame
enum AVCodecID id
static int read_header(FFV1Context *f)
Definition: ffv1dec.c:545
bitstream reader API header.
static unsigned int get_bits_long(GetBitContext *s, int n)
Read 0-32 bits.
Definition: get_bits.h:546
static int init_get_bits8(GetBitContext *s, const uint8_t *buffer, int byte_size)
Initialize GetBitContext.
Definition: get_bits.h:677
static unsigned int get_bits(GetBitContext *s, int n)
Read 1-25 bits.
Definition: get_bits.h:379
#define AV_CH_LAYOUT_MONO
#define AV_CH_LAYOUT_STEREO
@ AV_CODEC_ID_ADPCM_SWF
Definition: codec_id.h:366
@ AV_CODEC_ID_RAWVIDEO
Definition: codec_id.h:62
@ AV_CODEC_ID_PCM_U8
Definition: codec_id.h:318
@ AV_CODEC_ID_PCM_S16LE
Definition: codec_id.h:313
@ AV_CODEC_ID_NONE
Definition: codec_id.h:47
@ AV_CODEC_ID_MJPEG
Definition: codec_id.h:56
@ AV_CODEC_ID_MP3
preferred ID for decoding MPEG audio layer 1, 2 or 3
Definition: codec_id.h:425
@ AV_CODEC_ID_FLASHSV
Definition: codec_id.h:135
#define AV_PKT_FLAG_KEY
The packet contains a keyframe.
Definition: packet.h:410
void av_shrink_packet(AVPacket *pkt, int size)
Reduce packet size, correctly zeroing padding.
Definition: avpacket.c:114
int av_new_packet(AVPacket *pkt, int size)
Allocate the payload of a packet and initialize its fields with default values.
Definition: avpacket.c:99
@ AV_PKT_DATA_PALETTE
An AV_PKT_DATA_PALETTE side data packet contains exactly AVPALETTE_SIZE bytes worth of palette.
Definition: packet.h:46
AVStream * avformat_new_stream(AVFormatContext *s, const AVCodec *c)
Add a new stream to a media file.
Definition: utils.c:4509
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
#define AVERROR_EOF
End of file.
Definition: error.h:55
#define AVERROR(e)
Definition: error.h:43
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
Definition: log.h:215
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:200
#define AV_LOG_INFO
Standard information.
Definition: log.h:205
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:194
@ AVMEDIA_TYPE_AUDIO
Definition: avutil.h:202
@ AVMEDIA_TYPE_VIDEO
Definition: avutil.h:201
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:317
misc image utilities
int i
Definition: input.c:407
FLV common header.
#define FLV_VIDEO_FRAMETYPE_MASK
Definition: flv.h:45
@ FLV_FRAME_KEY
key frame (for AVC, a seekable frame)
Definition: flv.h:116
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:4945
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:5077
enum AVCodecID ff_codec_get_id(const AVCodecTag *tags, unsigned int tag)
Definition: utils.c:3131
static int read_probe(const AVProbeData *pd)
Definition: jvdec.c:55
common internal API header
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification.
Definition: internal.h:117
static av_cold int read_close(AVFormatContext *ctx)
Definition: libcdio.c:145
#define FFALIGN(x, a)
Definition: macros.h:48
uint32_t tag
Definition: movenc.c:1611
@ AV_PIX_FMT_NONE
Definition: pixfmt.h:65
@ AV_PIX_FMT_ARGB
packed ARGB 8:8:8:8, 32bpp, ARGBARGB...
Definition: pixfmt.h:92
@ AV_PIX_FMT_PAL8
8 bits with AV_PIX_FMT_RGB32 palette
Definition: pixfmt.h:77
@ AV_PIX_FMT_0RGB
packed RGB 8:8:8, 32bpp, XRGBXRGB... X=unused/undefined
Definition: pixfmt.h:237
#define AVPALETTE_COUNT
Definition: pixfmt.h:33
#define AVPALETTE_SIZE
Definition: pixfmt.h:32
#define AV_PIX_FMT_RGB555
Definition: pixfmt.h:387
unsigned int pos
Definition: spdifenc.c:412
uint64_t channel_layout
Audio only.
Definition: codec_par.h:162
int channels
Audio only.
Definition: codec_par.h:166
int width
Video only.
Definition: codec_par.h:126
enum AVMediaType codec_type
General type of the encoded data.
Definition: codec_par.h:56
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
Definition: codec_par.h:60
int sample_rate
Audio only.
Definition: codec_par.h:170
Format I/O context.
Definition: avformat.h:1232
void * priv_data
Format private data.
Definition: avformat.h:1260
Bytestream IO Context.
Definition: avio.h:161
const char * name
A comma separated list of short names for the format.
Definition: avformat.h:645
This structure stores compressed data.
Definition: packet.h:346
int stream_index
Definition: packet.h:371
int flags
A combination of AV_PKT_FLAG values.
Definition: packet.h:375
int size
Definition: packet.h:370
int64_t pts
Presentation timestamp in AVStream->time_base units; the time at which the decompressed packet will b...
Definition: packet.h:362
uint8_t * data
Definition: packet.h:369
int64_t pos
byte position in stream, -1 if unknown
Definition: packet.h:389
This structure contains the data a format has to probe a file.
Definition: avformat.h:441
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
Stream structure.
Definition: avformat.h:873
AVCodecParameters * codecpar
Codec parameters associated with this stream.
Definition: avformat.h:1038
int id
Format-specific stream ID.
Definition: avformat.h:880
enum AVStreamParseType need_parsing
Definition: avformat.h:1081
int samples_per_frame
Definition: swfdec.c:39
int frame_rate
Definition: swfdec.c:40
const AVCodecTag ff_swf_codec_tags[]
Definition: swf.c:25
@ TAG_DEFINEBITSLOSSLESS
Definition: swf.h:52
@ TAG_STREAMHEAD2
Definition: swf.h:67
@ TAG_STREAMHEAD
Definition: swf.h:50
@ TAG_DEFINESOUND
Definition: swf.h:47
@ TAG_STREAMBLOCK
Definition: swf.h:51
@ TAG_VIDEOSTREAM
Definition: swf.h:74
@ TAG_JPEG2
Definition: swf.h:53
@ TAG_DEFINEBITSLOSSLESS2
Definition: swf.h:63
@ TAG_VIDEOFRAME
Definition: swf.h:75
static int swf_read_header(AVFormatContext *s)
Definition: swfdec.c:148
static AVStream * create_new_audio_stream(AVFormatContext *s, int id, int info)
Definition: swfdec.c:191
static int get_swf_tag(AVIOContext *pb, int *len_ptr)
Definition: swfdec.c:59
static const AVCodecTag swf_audio_codec_tags[]
Definition: swfdec.c:50
static int swf_probe(const AVProbeData *p)
Definition: swfdec.c:77
static int swf_read_packet(AVFormatContext *s, AVPacket *pkt)
Definition: swfdec.c:217
AVInputFormat ff_swf_demuxer
Definition: swfdec.c:570
#define ff_dlog(a,...)
#define av_freep(p)
#define av_malloc(s)
#define av_log(a,...)
AVPacket * pkt
Definition: movenc.c:59
#define height
#define width
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
int len