FFmpeg  4.3
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 #endif
133 
135 {
136  SWFContext *swf = s->priv_data;
137  AVIOContext *pb = s->pb;
138  int nbits, len, tag;
139 
140  tag = avio_rb32(pb) & 0xffffff00;
141  avio_rl32(pb);
142 
143  if (tag == MKBETAG('C', 'W', 'S', 0)) {
144  av_log(s, AV_LOG_INFO, "SWF compressed file detected\n");
145 #if CONFIG_ZLIB
146  swf->zbuf_in = av_malloc(ZBUF_SIZE);
147  swf->zbuf_out = av_malloc(ZBUF_SIZE);
148  swf->zpb = avio_alloc_context(swf->zbuf_out, ZBUF_SIZE, 0, s,
149  zlib_refill, NULL, NULL);
150  if (!swf->zbuf_in || !swf->zbuf_out || !swf->zpb)
151  return AVERROR(ENOMEM);
152  swf->zpb->seekable = 0;
153  if (inflateInit(&swf->zstream) != Z_OK) {
154  av_log(s, AV_LOG_ERROR, "Unable to init zlib context\n");
155  av_freep(&swf->zbuf_in);
156  av_freep(&swf->zbuf_out);
157  return AVERROR(EINVAL);
158  }
159  pb = swf->zpb;
160 #else
161  av_log(s, AV_LOG_ERROR, "zlib support is required to read SWF compressed files\n");
162  return AVERROR(EIO);
163 #endif
164  } else if (tag != MKBETAG('F', 'W', 'S', 0))
165  return AVERROR(EIO);
166  /* skip rectangle size */
167  nbits = avio_r8(pb) >> 3;
168  len = (4 * nbits - 3 + 7) / 8;
169  avio_skip(pb, len);
170  swf->frame_rate = avio_rl16(pb); /* 8.8 fixed */
171  avio_rl16(pb); /* frame count */
172 
173  swf->samples_per_frame = 0;
175  return 0;
176 }
177 
179 {
180  int sample_rate_code, sample_size_code;
181  AVStream *ast = avformat_new_stream(s, NULL);
182  if (!ast)
183  return NULL;
184  ast->id = id;
185  if (info & 1) {
186  ast->codecpar->channels = 2;
188  } else {
189  ast->codecpar->channels = 1;
191  }
193  ast->codecpar->codec_id = ff_codec_get_id(swf_audio_codec_tags, info>>4 & 15);
195  sample_rate_code = info>>2 & 3;
196  sample_size_code = info>>1 & 1;
197  if (!sample_size_code && ast->codecpar->codec_id == AV_CODEC_ID_PCM_S16LE)
199  ast->codecpar->sample_rate = 44100 >> (3 - sample_rate_code);
200  avpriv_set_pts_info(ast, 64, 1, ast->codecpar->sample_rate);
201  return ast;
202 }
203 
205 {
206  SWFContext *swf = s->priv_data;
207  AVIOContext *pb = s->pb;
208  AVStream *vst = NULL, *ast = NULL, *st = 0;
209  int tag, len, i, frame, v, res;
210 
211 #if CONFIG_ZLIB
212  if (swf->zpb)
213  pb = swf->zpb;
214 #endif
215 
216  for(;;) {
217  uint64_t pos = avio_tell(pb);
218  tag = get_swf_tag(pb, &len);
219  if (tag < 0)
220  return tag;
221  if (len < 0) {
222  av_log(s, AV_LOG_ERROR, "invalid tag length: %d\n", len);
223  return AVERROR_INVALIDDATA;
224  }
225  if (tag == TAG_VIDEOSTREAM) {
226  int ch_id = avio_rl16(pb);
227  len -= 2;
228 
229  for (i=0; i<s->nb_streams; i++) {
230  st = s->streams[i];
231  if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO && st->id == ch_id)
232  goto skip;
233  }
234 
235  avio_rl16(pb);
236  avio_rl16(pb);
237  avio_rl16(pb);
238  avio_r8(pb);
239  /* Check for FLV1 */
240  vst = avformat_new_stream(s, NULL);
241  if (!vst)
242  return AVERROR(ENOMEM);
243  vst->id = ch_id;
246  avpriv_set_pts_info(vst, 16, 256, swf->frame_rate);
247  len -= 8;
248  } else if (tag == TAG_STREAMHEAD || tag == TAG_STREAMHEAD2) {
249  /* streaming found */
250 
251  for (i=0; i<s->nb_streams; i++) {
252  st = s->streams[i];
253  if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO && st->id == -1)
254  goto skip;
255  }
256 
257  avio_r8(pb);
258  v = avio_r8(pb);
259  swf->samples_per_frame = avio_rl16(pb);
260  ast = create_new_audio_stream(s, -1, v); /* -1 to avoid clash with video stream ch_id */
261  if (!ast)
262  return AVERROR(ENOMEM);
263  len -= 4;
264  } else if (tag == TAG_DEFINESOUND) {
265  /* audio stream */
266  int ch_id = avio_rl16(pb);
267 
268  for (i=0; i<s->nb_streams; i++) {
269  st = s->streams[i];
270  if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO && st->id == ch_id)
271  goto skip;
272  }
273 
274  // FIXME: The entire audio stream is stored in a single chunk/tag. Normally,
275  // these are smaller audio streams in DEFINESOUND tags, but it's technically
276  // possible they could be huge. Break it up into multiple packets if it's big.
277  v = avio_r8(pb);
278  ast = create_new_audio_stream(s, ch_id, v);
279  if (!ast)
280  return AVERROR(ENOMEM);
281  ast->duration = avio_rl32(pb); // number of samples
282  if (((v>>4) & 15) == 2) { // MP3 sound data record
283  ast->skip_samples = avio_rl16(pb);
284  len -= 2;
285  }
286  len -= 7;
287  if ((res = av_get_packet(pb, pkt, len)) < 0)
288  return res;
289  pkt->pos = pos;
290  pkt->stream_index = ast->index;
291  return pkt->size;
292  } else if (tag == TAG_VIDEOFRAME) {
293  int ch_id = avio_rl16(pb);
294  len -= 2;
295  for(i=0; i<s->nb_streams; i++) {
296  st = s->streams[i];
297  if (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO && st->id == ch_id) {
298  frame = avio_rl16(pb);
299  len -= 2;
300  if (len <= 0)
301  goto skip;
302  if ((res = av_get_packet(pb, pkt, len)) < 0)
303  return res;
304  pkt->pos = pos;
305  pkt->pts = frame;
306  pkt->stream_index = st->index;
307  return pkt->size;
308  }
309  }
310  } else if (tag == TAG_DEFINEBITSLOSSLESS || tag == TAG_DEFINEBITSLOSSLESS2) {
311 #if CONFIG_ZLIB
312  long out_len;
313  uint8_t *buf = NULL, *zbuf = NULL, *pal;
314  uint32_t colormap[AVPALETTE_COUNT] = {0};
315  const int alpha_bmp = tag == TAG_DEFINEBITSLOSSLESS2;
316  const int colormapbpp = 3 + alpha_bmp;
317  int linesize, colormapsize = 0;
318 
319  const int ch_id = avio_rl16(pb);
320  const int bmp_fmt = avio_r8(pb);
321  const int width = avio_rl16(pb);
322  const int height = avio_rl16(pb);
323  int pix_fmt;
324 
325  len -= 2+1+2+2;
326 
327  switch (bmp_fmt) {
328  case 3: // PAL-8
329  linesize = width;
330  colormapsize = avio_r8(pb) + 1;
331  len--;
332  break;
333  case 4: // RGB15
334  linesize = width * 2;
335  break;
336  case 5: // RGB24 (0RGB)
337  linesize = width * 4;
338  break;
339  default:
340  av_log(s, AV_LOG_ERROR, "invalid bitmap format %d, skipped\n", bmp_fmt);
341  goto bitmap_end_skip;
342  }
343 
344  linesize = FFALIGN(linesize, 4);
345 
346  if (av_image_check_size(width, height, 0, s) < 0 ||
347  linesize >= INT_MAX / height ||
348  linesize * height >= INT_MAX - colormapsize * colormapbpp) {
349  av_log(s, AV_LOG_ERROR, "invalid frame size %dx%d\n", width, height);
350  goto bitmap_end_skip;
351  }
352 
353  out_len = colormapsize * colormapbpp + linesize * height;
354 
355  ff_dlog(s, "bitmap: ch=%d fmt=%d %dx%d (linesize=%d) len=%d->%ld pal=%d\n",
356  ch_id, bmp_fmt, width, height, linesize, len, out_len, colormapsize);
357 
358  zbuf = av_malloc(len);
359  buf = av_malloc(out_len);
360  if (!zbuf || !buf) {
361  res = AVERROR(ENOMEM);
362  goto bitmap_end;
363  }
364 
365  len = avio_read(pb, zbuf, len);
366  if (len < 0 || (res = uncompress(buf, &out_len, zbuf, len)) != Z_OK) {
367  av_log(s, AV_LOG_WARNING, "Failed to uncompress one bitmap\n");
368  goto bitmap_end_skip;
369  }
370 
371  for (i = 0; i < s->nb_streams; i++) {
372  st = s->streams[i];
373  if (st->codecpar->codec_id == AV_CODEC_ID_RAWVIDEO && st->id == -3)
374  break;
375  }
376  if (i == s->nb_streams) {
377  vst = avformat_new_stream(s, NULL);
378  if (!vst) {
379  res = AVERROR(ENOMEM);
380  goto bitmap_end;
381  }
382  vst->id = -3; /* -3 to avoid clash with video stream and audio stream */
385  avpriv_set_pts_info(vst, 64, 256, swf->frame_rate);
386  st = vst;
387  }
388 
389  if ((res = av_new_packet(pkt, out_len - colormapsize * colormapbpp)) < 0)
390  goto bitmap_end;
391  if (!st->codecpar->width && !st->codecpar->height) {
392  st->codecpar->width = width;
393  st->codecpar->height = height;
394  } else {
395  ff_add_param_change(pkt, 0, 0, 0, width, height);
396  }
397  pkt->pos = pos;
398  pkt->stream_index = st->index;
399 
400  if (linesize * height > pkt->size) {
401  res = AVERROR_INVALIDDATA;
402  goto bitmap_end;
403  }
404 
405  switch (bmp_fmt) {
406  case 3:
407  pix_fmt = AV_PIX_FMT_PAL8;
408  for (i = 0; i < colormapsize; i++)
409  if (alpha_bmp) colormap[i] = buf[3]<<24 | AV_RB24(buf + 4*i);
410  else colormap[i] = 0xffU <<24 | AV_RB24(buf + 3*i);
412  if (!pal) {
413  res = AVERROR(ENOMEM);
414  goto bitmap_end;
415  }
416  memcpy(pal, colormap, AVPALETTE_SIZE);
417  break;
418  case 4:
419  pix_fmt = AV_PIX_FMT_RGB555;
420  break;
421  case 5:
422  pix_fmt = alpha_bmp ? AV_PIX_FMT_ARGB : AV_PIX_FMT_0RGB;
423  break;
424  default:
425  av_assert0(0);
426  }
427  if (st->codecpar->format != AV_PIX_FMT_NONE && st->codecpar->format != pix_fmt) {
428  av_log(s, AV_LOG_ERROR, "pixel format change unsupported\n");
429  } else
430  st->codecpar->format = pix_fmt;
431 
432  memcpy(pkt->data, buf + colormapsize*colormapbpp, linesize * height);
433 
434  res = pkt->size;
435 
436 bitmap_end:
437  av_freep(&zbuf);
438  av_freep(&buf);
439  return res;
440 bitmap_end_skip:
441  av_freep(&zbuf);
442  av_freep(&buf);
443 #else
444  av_log(s, AV_LOG_ERROR, "this file requires zlib support compiled in\n");
445 #endif
446  } else if (tag == TAG_STREAMBLOCK) {
447  for (i = 0; i < s->nb_streams; i++) {
448  st = s->streams[i];
449  if (st->codecpar->codec_type == AVMEDIA_TYPE_AUDIO && st->id == -1) {
450  if (st->codecpar->codec_id == AV_CODEC_ID_MP3) {
451  avio_skip(pb, 4);
452  len -= 4;
453  if (len <= 0)
454  goto skip;
455  if ((res = av_get_packet(pb, pkt, len)) < 0)
456  return res;
457  } else { // ADPCM, PCM
458  if (len <= 0)
459  goto skip;
460  if ((res = av_get_packet(pb, pkt, len)) < 0)
461  return res;
462  }
463  pkt->pos = pos;
464  pkt->stream_index = st->index;
465  return pkt->size;
466  }
467  }
468  } else if (tag == TAG_JPEG2) {
469  for (i=0; i<s->nb_streams; i++) {
470  st = s->streams[i];
471  if (st->codecpar->codec_id == AV_CODEC_ID_MJPEG && st->id == -2)
472  break;
473  }
474  if (i == s->nb_streams) {
475  vst = avformat_new_stream(s, NULL);
476  if (!vst)
477  return AVERROR(ENOMEM);
478  vst->id = -2; /* -2 to avoid clash with video stream and audio stream */
481  avpriv_set_pts_info(vst, 64, 256, swf->frame_rate);
482  st = vst;
483  }
484  avio_rl16(pb); /* BITMAP_ID */
485  len -= 2;
486  if (len < 4)
487  goto skip;
488  if ((res = av_new_packet(pkt, len)) < 0)
489  return res;
490  if (avio_read(pb, pkt->data, 4) != 4) {
491  return AVERROR_INVALIDDATA;
492  }
493  if (AV_RB32(pkt->data) == 0xffd8ffd9 ||
494  AV_RB32(pkt->data) == 0xffd9ffd8) {
495  /* old SWF files containing SOI/EOI as data start */
496  /* files created by swink have reversed tag */
497  pkt->size -= 4;
498  memset(pkt->data+pkt->size, 0, 4);
499  res = avio_read(pb, pkt->data, pkt->size);
500  } else {
501  res = avio_read(pb, pkt->data + 4, pkt->size - 4);
502  if (res >= 0)
503  res += 4;
504  }
505  if (res != pkt->size) {
506  if (res < 0) {
507  return res;
508  }
509  av_shrink_packet(pkt, res);
510  }
511 
512  pkt->pos = pos;
513  pkt->stream_index = st->index;
514  return pkt->size;
515  } else {
516  av_log(s, AV_LOG_DEBUG, "Unknown tag: %d\n", tag);
517  }
518  skip:
519  if(len<0)
520  av_log(s, AV_LOG_WARNING, "Clipping len %d\n", len);
521  len = FFMAX(0, len);
522  avio_skip(pb, len);
523  }
524 }
525 
526 #if CONFIG_ZLIB
527 static av_cold int swf_read_close(AVFormatContext *avctx)
528 {
529  SWFContext *s = avctx->priv_data;
530  inflateEnd(&s->zstream);
531  av_freep(&s->zbuf_in);
532  av_freep(&s->zbuf_out);
533  avio_context_free(&s->zpb);
534  return 0;
535 }
536 #endif
537 
539  .name = "swf",
540  .long_name = NULL_IF_CONFIG_SMALL("SWF (ShockWave Flash)"),
541  .priv_data_size = sizeof(SWFContext),
545 #if CONFIG_ZLIB
546  .read_close = swf_read_close,
547 #endif
548 };
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:3158
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:4938
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:4519
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:304
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:538
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:186
unsigned int pos
Definition: spdifenc.c:410
#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:5070
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:178
static int swf_read_header(AVFormatContext *s)
Definition: swfdec.c:134
static int read_header(FFV1Context *f)
Definition: ffv1dec.c:527
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:204
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