FFmpeg: libavformat/swfenc.c Source File

FFmpeg
swfenc.c
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1 /*
2  * Flash Compatible Streaming Format muxer
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 "libavcodec/put_bits.h"
24 #include "libavutil/avassert.h"
25 #include "avformat.h"
26 #include "swf.h"
27 
28  static void put_swf_tag(AVFormatContext *s, int tag)
29 {
30  SWFContext *swf = s->priv_data;
31  AVIOContext *pb = s->pb;
32 
33  swf->tag_pos = avio_tell(pb);
34  swf->tag = tag;
35  /* reserve some room for the tag */
36  if (tag & TAG_LONG) {
37  avio_wl16(pb, 0);
38  avio_wl32(pb, 0);
39  } else {
40  avio_wl16(pb, 0);
41  }
42 }
43 
44  static void put_swf_end_tag(AVFormatContext *s)
45 {
46  SWFContext *swf = s->priv_data;
47  AVIOContext *pb = s->pb;
48  int64_t pos;
49  int tag_len, tag;
50 
51  pos = avio_tell(pb);
52  tag_len = pos - swf->tag_pos - 2;
53  tag = swf->tag;
54  avio_seek(pb, swf->tag_pos, SEEK_SET);
55  if (tag & TAG_LONG) {
56  tag &= ~TAG_LONG;
57  avio_wl16(pb, (tag << 6) | 0x3f);
58  avio_wl32(pb, tag_len - 4);
59  } else {
60  av_assert0(tag_len < 0x3f);
61  avio_wl16(pb, (tag << 6) | tag_len);
62  }
63  avio_seek(pb, pos, SEEK_SET);
64 }
65 
66  static inline void max_nbits(int *nbits_ptr, int val)
67 {
68  int n;
69 
70  if (val == 0)
71  return;
72  val = FFABS(val);
73  n = 1;
74  while (val != 0) {
75  n++;
76  val >>= 1;
77  }
78  if (n > *nbits_ptr)
79  *nbits_ptr = n;
80 }
81 
82  static void put_swf_rect(AVIOContext *pb,
83  int xmin, int xmax, int ymin, int ymax)
84 {
85  PutBitContext p;
86  uint8_t buf[256];
87  int nbits, mask;
88 
89  init_put_bits(&p, buf, sizeof(buf));
90 
91  nbits = 0;
92  max_nbits(&nbits, xmin);
93  max_nbits(&nbits, xmax);
94  max_nbits(&nbits, ymin);
95  max_nbits(&nbits, ymax);
96  mask = (1 << nbits) - 1;
97 
98  /* rectangle info */
99  put_bits(&p, 5, nbits);
100  put_bits(&p, nbits, xmin & mask);
101  put_bits(&p, nbits, xmax & mask);
102  put_bits(&p, nbits, ymin & mask);
103  put_bits(&p, nbits, ymax & mask);
104 
105  flush_put_bits(&p);
106  avio_write(pb, buf, put_bits_ptr(&p) - p.buf);
107 }
108 
109  static void put_swf_line_edge(PutBitContext *pb, int dx, int dy)
110 {
111  int nbits, mask;
112 
113  put_bits(pb, 1, 1); /* edge */
114  put_bits(pb, 1, 1); /* line select */
115  nbits = 2;
116  max_nbits(&nbits, dx);
117  max_nbits(&nbits, dy);
118 
119  mask = (1 << nbits) - 1;
120  put_bits(pb, 4, nbits - 2); /* 16 bits precision */
121  if (dx == 0) {
122  put_bits(pb, 1, 0);
123  put_bits(pb, 1, 1);
124  put_bits(pb, nbits, dy & mask);
125  } else if (dy == 0) {
126  put_bits(pb, 1, 0);
127  put_bits(pb, 1, 0);
128  put_bits(pb, nbits, dx & mask);
129  } else {
130  put_bits(pb, 1, 1);
131  put_bits(pb, nbits, dx & mask);
132  put_bits(pb, nbits, dy & mask);
133  }
134 }
135 
136  #define FRAC_BITS 16
137 
138  static void put_swf_matrix(AVIOContext *pb,
139  int a, int b, int c, int d, int tx, int ty)
140 {
141  PutBitContext p;
142  uint8_t buf[256];
143  int nbits;
144 
145  init_put_bits(&p, buf, sizeof(buf));
146 
147  put_bits(&p, 1, 1); /* a, d present */
148  nbits = 1;
149  max_nbits(&nbits, a);
150  max_nbits(&nbits, d);
151  put_bits(&p, 5, nbits); /* nb bits */
152  put_bits(&p, nbits, a);
153  put_bits(&p, nbits, d);
154 
155  put_bits(&p, 1, 1); /* b, c present */
156  nbits = 1;
157  max_nbits(&nbits, c);
158  max_nbits(&nbits, b);
159  put_bits(&p, 5, nbits); /* nb bits */
160  put_bits(&p, nbits, c);
161  put_bits(&p, nbits, b);
162 
163  nbits = 1;
164  max_nbits(&nbits, tx);
165  max_nbits(&nbits, ty);
166  put_bits(&p, 5, nbits); /* nb bits */
167  put_bits(&p, nbits, tx);
168  put_bits(&p, nbits, ty);
169 
170  flush_put_bits(&p);
171  avio_write(pb, buf, put_bits_ptr(&p) - p.buf);
172 }
173 
174  static int swf_write_header(AVFormatContext *s)
175 {
176  SWFContext *swf = s->priv_data;
177  AVIOContext *pb = s->pb;
178  PutBitContext p;
179  uint8_t buf1[256];
180  int i, width, height, rate, rate_base;
181  int version;
182 
183  swf->sound_samples = 0;
184  swf->swf_frame_number = 0;
185  swf->video_frame_number = 0;
186 
187  for(i=0;i<s->nb_streams;i++) {
188  AVCodecParameters *par = s->streams[i]->codecpar;
189  if (par->codec_type == AVMEDIA_TYPE_AUDIO) {
190  if (swf->audio_par) {
191  av_log(s, AV_LOG_ERROR, "SWF muxer only supports 1 audio stream\n");
192  return AVERROR_INVALIDDATA;
193  }
194  if (par->codec_id == AV_CODEC_ID_MP3) {
195  swf->audio_par = par;
196  swf->audio_fifo= av_fifo_alloc(AUDIO_FIFO_SIZE);
197  if (!swf->audio_fifo)
198  return AVERROR(ENOMEM);
199  } else {
200  av_log(s, AV_LOG_ERROR, "SWF muxer only supports MP3\n");
201  return -1;
202  }
203  } else {
204  if (swf->video_par) {
205  av_log(s, AV_LOG_ERROR, "SWF muxer only supports 1 video stream\n");
206  return AVERROR_INVALIDDATA;
207  }
208  if (par->codec_id == AV_CODEC_ID_VP6F ||
209  par->codec_id == AV_CODEC_ID_FLV1 ||
210  par->codec_id == AV_CODEC_ID_MJPEG) {
211  swf->video_st = s->streams[i];
212  swf->video_par = par;
213  } else {
214  av_log(s, AV_LOG_ERROR, "SWF muxer only supports VP6, FLV1 and MJPEG\n");
215  return -1;
216  }
217  }
218  }
219 
220  if (!swf->video_par) {
221  /* currently, cannot work correctly if audio only */
222  width = 320;
223  height = 200;
224  rate = 10;
225  rate_base= 1;
226  } else {
227  width = swf->video_par->width;
228  height = swf->video_par->height;
229  // TODO: should be avg_frame_rate
230  rate = swf->video_st->time_base.den;
231  rate_base = swf->video_st->time_base.num;
232  }
233 
234  if (!swf->audio_par)
235  swf->samples_per_frame = (44100LL * rate_base) / rate;
236  else
237  swf->samples_per_frame = (swf->audio_par->sample_rate * rate_base) / rate;
238 
239  avio_write(pb, "FWS", 3);
240 
241  if (!strcmp("avm2", s->oformat->name))
242  version = 9;
243  else if (swf->video_par && swf->video_par->codec_id == AV_CODEC_ID_VP6F)
244  version = 8; /* version 8 and above support VP6 codec */
245  else if (swf->video_par && swf->video_par->codec_id == AV_CODEC_ID_FLV1)
246  version = 6; /* version 6 and above support FLV1 codec */
247  else
248  version = 4; /* version 4 for mpeg audio support */
249  avio_w8(pb, version);
250 
251  avio_wl32(pb, DUMMY_FILE_SIZE); /* dummy size
252  (will be patched if not streamed) */
253 
254  put_swf_rect(pb, 0, width * 20, 0, height * 20);
255  if ((rate * 256LL) / rate_base >= (1<<16)) {
256  av_log(s, AV_LOG_ERROR, "Invalid (too large) frame rate %d/%d\n", rate, rate_base);
257  return AVERROR(EINVAL);
258  }
259  avio_wl16(pb, (rate * 256) / rate_base); /* frame rate */
260  swf->duration_pos = avio_tell(pb);
261  avio_wl16(pb, (uint16_t)(DUMMY_DURATION * (int64_t)rate / rate_base)); /* frame count */
262 
263  /* avm2/swf v9 (also v8?) files require a file attribute tag */
264  if (version == 9) {
265  put_swf_tag(s, TAG_FILEATTRIBUTES);
266  avio_wl32(pb, 1<<3); /* set ActionScript v3/AVM2 flag */
267  put_swf_end_tag(s);
268  }
269 
270  /* define a shape with the jpeg inside */
271  if (swf->video_par && swf->video_par->codec_id == AV_CODEC_ID_MJPEG) {
272  put_swf_tag(s, TAG_DEFINESHAPE);
273 
274  avio_wl16(pb, SHAPE_ID); /* ID of shape */
275  /* bounding rectangle */
276  put_swf_rect(pb, 0, width, 0, height);
277  /* style info */
278  avio_w8(pb, 1); /* one fill style */
279  avio_w8(pb, 0x41); /* clipped bitmap fill */
280  avio_wl16(pb, BITMAP_ID); /* bitmap ID */
281  /* position of the bitmap */
282  put_swf_matrix(pb, 1 << FRAC_BITS, 0,
283  0, 1 << FRAC_BITS, 0, 0);
284  avio_w8(pb, 0); /* no line style */
285 
286  /* shape drawing */
287  init_put_bits(&p, buf1, sizeof(buf1));
288  put_bits(&p, 4, 1); /* one fill bit */
289  put_bits(&p, 4, 0); /* zero line bit */
290 
291  put_bits(&p, 1, 0); /* not an edge */
292  put_bits(&p, 5, FLAG_MOVETO | FLAG_SETFILL0);
293  put_bits(&p, 5, 1); /* nbits */
294  put_bits(&p, 1, 0); /* X */
295  put_bits(&p, 1, 0); /* Y */
296  put_bits(&p, 1, 1); /* set fill style 1 */
297 
298  /* draw the rectangle ! */
299  put_swf_line_edge(&p, width, 0);
300  put_swf_line_edge(&p, 0, height);
301  put_swf_line_edge(&p, -width, 0);
302  put_swf_line_edge(&p, 0, -height);
303 
304  /* end of shape */
305  put_bits(&p, 1, 0); /* not an edge */
306  put_bits(&p, 5, 0);
307 
308  flush_put_bits(&p);
309  avio_write(pb, buf1, put_bits_ptr(&p) - p.buf);
310 
311  put_swf_end_tag(s);
312  }
313 
314  if (swf->audio_par && swf->audio_par->codec_id == AV_CODEC_ID_MP3) {
315  int v = 0;
316 
317  /* start sound */
318  put_swf_tag(s, TAG_STREAMHEAD2);
319  switch(swf->audio_par->sample_rate) {
320  case 11025: v |= 1 << 2; break;
321  case 22050: v |= 2 << 2; break;
322  case 44100: v |= 3 << 2; break;
323  default:
324  /* not supported */
325  av_log(s, AV_LOG_ERROR, "swf does not support that sample rate, choose from (44100, 22050, 11025).\n");
326  return -1;
327  }
328  v |= 0x02; /* 16 bit playback */
329  if (swf->audio_par->channels == 2)
330  v |= 0x01; /* stereo playback */
331  avio_w8(s->pb, v);
332  v |= 0x20; /* mp3 compressed */
333  avio_w8(s->pb, v);
334  avio_wl16(s->pb, swf->samples_per_frame); /* avg samples per frame */
335  avio_wl16(s->pb, 0);
336 
337  put_swf_end_tag(s);
338  }
339 
340  avio_flush(s->pb);
341  return 0;
342 }
343 
344  static int swf_write_video(AVFormatContext *s,
345  AVCodecParameters *par, const uint8_t *buf, int size)
346 {
347  SWFContext *swf = s->priv_data;
348  AVIOContext *pb = s->pb;
349 
350  /* Flash Player limit */
351  if (swf->swf_frame_number == 16000)
352  av_log(s, AV_LOG_INFO, "warning: Flash Player limit of 16000 frames reached\n");
353 
354  if (par->codec_id == AV_CODEC_ID_VP6F ||
355  par->codec_id == AV_CODEC_ID_FLV1) {
356  if (swf->video_frame_number == 0) {
357  /* create a new video object */
358  put_swf_tag(s, TAG_VIDEOSTREAM);
359  avio_wl16(pb, VIDEO_ID);
360  swf->vframes_pos = avio_tell(pb);
361  avio_wl16(pb, 15000); /* hard flash player limit */
362  avio_wl16(pb, par->width);
363  avio_wl16(pb, par->height);
364  avio_w8(pb, 0);
365  avio_w8(pb,ff_codec_get_tag(ff_swf_codec_tags, par->codec_id));
366  put_swf_end_tag(s);
367 
368  /* place the video object for the first time */
369  put_swf_tag(s, TAG_PLACEOBJECT2);
370  avio_w8(pb, 0x36);
371  avio_wl16(pb, 1);
372  avio_wl16(pb, VIDEO_ID);
373  put_swf_matrix(pb, 1 << FRAC_BITS, 0, 0, 1 << FRAC_BITS, 0, 0);
374  avio_wl16(pb, swf->video_frame_number);
375  avio_write(pb, "video", 5);
376  avio_w8(pb, 0x00);
377  put_swf_end_tag(s);
378  } else {
379  /* mark the character for update */
380  put_swf_tag(s, TAG_PLACEOBJECT2);
381  avio_w8(pb, 0x11);
382  avio_wl16(pb, 1);
383  avio_wl16(pb, swf->video_frame_number);
384  put_swf_end_tag(s);
385  }
386 
387  /* set video frame data */
388  put_swf_tag(s, TAG_VIDEOFRAME | TAG_LONG);
389  avio_wl16(pb, VIDEO_ID);
390  avio_wl16(pb, swf->video_frame_number++);
391  avio_write(pb, buf, size);
392  put_swf_end_tag(s);
393  } else if (par->codec_id == AV_CODEC_ID_MJPEG) {
394  if (swf->swf_frame_number > 0) {
395  /* remove the shape */
396  put_swf_tag(s, TAG_REMOVEOBJECT);
397  avio_wl16(pb, SHAPE_ID); /* shape ID */
398  avio_wl16(pb, 1); /* depth */
399  put_swf_end_tag(s);
400 
401  /* free the bitmap */
402  put_swf_tag(s, TAG_FREECHARACTER);
403  avio_wl16(pb, BITMAP_ID);
404  put_swf_end_tag(s);
405  }
406 
407  put_swf_tag(s, TAG_JPEG2 | TAG_LONG);
408 
409  avio_wl16(pb, BITMAP_ID); /* ID of the image */
410 
411  /* a dummy jpeg header seems to be required */
412  avio_wb32(pb, 0xffd8ffd9);
413  /* write the jpeg image */
414  avio_write(pb, buf, size);
415 
416  put_swf_end_tag(s);
417 
418  /* draw the shape */
419 
420  put_swf_tag(s, TAG_PLACEOBJECT);
421  avio_wl16(pb, SHAPE_ID); /* shape ID */
422  avio_wl16(pb, 1); /* depth */
423  put_swf_matrix(pb, 20 << FRAC_BITS, 0, 0, 20 << FRAC_BITS, 0, 0);
424  put_swf_end_tag(s);
425  }
426 
427  swf->swf_frame_number++;
428 
429  /* streaming sound always should be placed just before showframe tags */
430  if (swf->audio_par && av_fifo_size(swf->audio_fifo)) {
431  int frame_size = av_fifo_size(swf->audio_fifo);
432  put_swf_tag(s, TAG_STREAMBLOCK | TAG_LONG);
433  avio_wl16(pb, swf->sound_samples);
434  avio_wl16(pb, 0); // seek samples
435  av_fifo_generic_read(swf->audio_fifo, pb, frame_size, (void*)avio_write);
436  put_swf_end_tag(s);
437 
438  /* update FIFO */
439  swf->sound_samples = 0;
440  }
441 
442  /* output the frame */
443  put_swf_tag(s, TAG_SHOWFRAME);
444  put_swf_end_tag(s);
445 
446  return 0;
447 }
448 
449  static int swf_write_audio(AVFormatContext *s,
450  AVCodecParameters *par, uint8_t *buf, int size)
451 {
452  SWFContext *swf = s->priv_data;
453 
454  /* Flash Player limit */
455  if (swf->swf_frame_number == 16000)
456  av_log(s, AV_LOG_INFO, "warning: Flash Player limit of 16000 frames reached\n");
457 
458  if (av_fifo_size(swf->audio_fifo) + size > AUDIO_FIFO_SIZE) {
459  av_log(s, AV_LOG_ERROR, "audio fifo too small to mux audio essence\n");
460  return -1;
461  }
462 
463  av_fifo_generic_write(swf->audio_fifo, buf, size, NULL);
464  swf->sound_samples += av_get_audio_frame_duration2(par, size);
465 
466  /* if audio only stream make sure we add swf frames */
467  if (!swf->video_par)
468  swf_write_video(s, par, 0, 0);
469 
470  return 0;
471 }
472 
473  static int swf_write_packet(AVFormatContext *s, AVPacket *pkt)
474 {
475  AVCodecParameters *par = s->streams[pkt->stream_index]->codecpar;
476  if (par->codec_type == AVMEDIA_TYPE_AUDIO)
477  return swf_write_audio(s, par, pkt->data, pkt->size);
478  else
479  return swf_write_video(s, par, pkt->data, pkt->size);
480 }
481 
482  static int swf_write_trailer(AVFormatContext *s)
483 {
484  SWFContext *swf = s->priv_data;
485  AVIOContext *pb = s->pb;
486  AVCodecParameters *par, *video_par;
487  int file_size, i;
488 
489  video_par = NULL;
490  for(i=0;i<s->nb_streams;i++) {
491  par = s->streams[i]->codecpar;
492  if (par->codec_type == AVMEDIA_TYPE_VIDEO)
493  video_par = par;
494  else {
495  av_fifo_freep(&swf->audio_fifo);
496  }
497  }
498 
499  put_swf_tag(s, TAG_END);
500  put_swf_end_tag(s);
501 
502  /* patch file size and number of frames if not streamed */
503  if ((s->pb->seekable & AVIO_SEEKABLE_NORMAL) && video_par) {
504  file_size = avio_tell(pb);
505  avio_seek(pb, 4, SEEK_SET);
506  avio_wl32(pb, file_size);
507  avio_seek(pb, swf->duration_pos, SEEK_SET);
508  avio_wl16(pb, swf->video_frame_number);
509  if (swf->vframes_pos) {
510  avio_seek(pb, swf->vframes_pos, SEEK_SET);
511  avio_wl16(pb, swf->video_frame_number);
512  }
513  avio_seek(pb, file_size, SEEK_SET);
514  }
515  return 0;
516 }
517 
518 #if CONFIG_SWF_MUXER
519 AVOutputFormat ff_swf_muxer = {
520  .name = "swf",
521  .long_name = NULL_IF_CONFIG_SMALL("SWF (ShockWave Flash)"),
522  .mime_type = "application/x-shockwave-flash",
523  .extensions = "swf",
524  .priv_data_size = sizeof(SWFContext),
525  .audio_codec = AV_CODEC_ID_MP3,
526  .video_codec = AV_CODEC_ID_FLV1,
527  .write_header = swf_write_header,
528  .write_packet = swf_write_packet,
529  .write_trailer = swf_write_trailer,
530  .flags = AVFMT_TS_NONSTRICT,
531 };
532 #endif
533 #if CONFIG_AVM2_MUXER
534 AVOutputFormat ff_avm2_muxer = {
535  .name = "avm2",
536  .long_name = NULL_IF_CONFIG_SMALL("SWF (ShockWave Flash) (AVM2)"),
537  .mime_type = "application/x-shockwave-flash",
538  .priv_data_size = sizeof(SWFContext),
539  .audio_codec = AV_CODEC_ID_MP3,
540  .video_codec = AV_CODEC_ID_FLV1,
541  .write_header = swf_write_header,
542  .write_packet = swf_write_packet,
543  .write_trailer = swf_write_trailer,
544  .flags = AVFMT_TS_NONSTRICT,
545 };
546 #endif
SHAPE_ID
#define SHAPE_ID
Definition: swf.h:121
write_packet
static void write_packet(OutputFile *of, AVPacket *pkt, OutputStream *ost, int unqueue)
Definition: ffmpeg.c:679
ff_swf_codec_tags
const AVCodecTag ff_swf_codec_tags[]
Definition: swf.c:25
NULL
#define NULL
Definition: coverity.c:32
val
const char const char void * val
Definition: avisynth_c.h:771
avio_wl16
void avio_wl16(AVIOContext *s, unsigned int val)
Definition: aviobuf.c:469
s
const char * s
Definition: avisynth_c.h:768
AVIOContext
Bytestream IO Context.
Definition: avio.h:161
AVERROR_INVALIDDATA
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:59
SWFContext
Definition: swf.h:123
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static void put_bits(Jpeg2000EncoderContext *s, int val, int n)
put n times val bit
Definition: j2kenc.c:207
VIDEO_ID
#define VIDEO_ID
Definition: mpeg.h:42
SWFContext::video_st
AVStream * video_st
Definition: swf.h:135
AVCodecParameters::codec_id
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
Definition: avcodec.h:3884
AVRational::num
int num
Numerator.
Definition: rational.h:59
AVPacket::size
int size
Definition: avcodec.h:1431
b
const char * b
Definition: vf_curves.c:113
avio_seek
int64_t avio_seek(AVIOContext *s, int64_t offset, int whence)
fseek() equivalent for AVIOContext.
Definition: aviobuf.c:246
ff_codec_get_tag
unsigned int ff_codec_get_tag(const AVCodecTag *tags, enum AVCodecID id)
Definition: utils.c:3107
version
int version
Definition: avisynth_c.h:766
pkt
static AVPacket pkt
Definition: demuxing_decoding.c:54
AVFMT_TS_NONSTRICT
#define AVFMT_TS_NONSTRICT
Format does not require strictly increasing timestamps, but they must still be monotonic.
Definition: avformat.h:479
AVCodecParameters
This struct describes the properties of an encoded stream.
Definition: avcodec.h:3876
TAG_JPEG2
Definition: swf.h:62
DUMMY_DURATION
#define DUMMY_DURATION
Definition: swf.h:39
av_fifo_generic_write
int av_fifo_generic_write(AVFifoBuffer *f, void *src, int size, int(*func)(void *, void *, int))
Feed data from a user-supplied callback to an AVFifoBuffer.
Definition: fifo.c:122
AVFormatContext
Format I/O context.
Definition: avformat.h:1342
av_assert0
#define av_assert0(cond)
assert() equivalent, that is always enabled.
Definition: avassert.h:37
avio_wl32
void avio_wl32(AVIOContext *s, unsigned int val)
Definition: aviobuf.c:369
uint8_t
uint8_t
Definition: audio_convert.c:194
AVCodecParameters::width
int width
Video only.
Definition: avcodec.h:3950
AVFormatContext::streams
AVStream ** streams
A list of all streams in the file.
Definition: avformat.h:1410
SWFContext::video_par
AVCodecParameters * video_par
Definition: swf.h:134
height
#define height
AV_CODEC_ID_FLV1
Definition: avcodec.h:239
put_swf_rect
static void put_swf_rect(AVIOContext *pb, int xmin, int xmax, int ymin, int ymax)
Definition: swfenc.c:82
AVPacket::data
uint8_t * data
Definition: avcodec.h:1430
BITMAP_ID
#define BITMAP_ID
Definition: swf.h:119
flags
static int flags
Definition: log.c:55
tag
uint32_t tag
Definition: movenc.c:1455
SWFContext::swf_frame_number
int swf_frame_number
Definition: swf.h:129
TAG_SHOWFRAME
Definition: swf.h:43
size
ptrdiff_t size
Definition: opengl_enc.c:101
avio_tell
static av_always_inline int64_t avio_tell(AVIOContext *s)
ftell() equivalent for AVIOContext.
Definition: avio.h:557
AV_CODEC_ID_MJPEG
Definition: avcodec.h:225
avio_write
void avio_write(AVIOContext *s, const unsigned char *buf, int size)
Definition: aviobuf.c:218
av_log
#define av_log(a,...)
Definition: tableprint_vlc.h:28
put_swf_line_edge
static void put_swf_line_edge(PutBitContext *pb, int dx, int dy)
Definition: swfenc.c:109
AVFormatContext::oformat
struct AVOutputFormat * oformat
The output container format.
Definition: avformat.h:1361
AV_LOG_ERROR
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
put_bits_ptr
static uint8_t * put_bits_ptr(PutBitContext *s)
Return the pointer to the byte where the bitstream writer will put the next bit.
Definition: put_bits.h:324
SWFContext::video_frame_number
int video_frame_number
Definition: swf.h:130
mask
static const uint16_t mask[17]
Definition: lzw.c:38
AVERROR
#define AVERROR(e)
Definition: error.h:43
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:186
av_fifo_generic_read
int av_fifo_generic_read(AVFifoBuffer *f, void *dest, int buf_size, void(*func)(void *, void *, int))
Feed data from an AVFifoBuffer to a user-supplied callback.
Definition: fifo.c:213
AV_CODEC_ID_MP3
preferred ID for decoding MPEG audio layer 1, 2 or 3
Definition: avcodec.h:552
AVCodecParameters::codec_type
enum AVMediaType codec_type
General type of the encoded data.
Definition: avcodec.h:3880
PutBitContext::buf
uint8_t * buf
Definition: put_bits.h:38
AVMEDIA_TYPE_AUDIO
Definition: avutil.h:202
width
uint16_t width
Definition: gdv.c:47
avassert.h
simple assert() macros that are a bit more flexible than ISO C assert().
SWFContext::sound_samples
int sound_samples
Definition: swf.h:128
av_get_audio_frame_duration2
int av_get_audio_frame_duration2(AVCodecParameters *par, int frame_bytes)
This function is the same as av_get_audio_frame_duration(), except it works with AVCodecParameters in...
Definition: utils.c:1709
AVFormatContext::nb_streams
unsigned int nb_streams
Number of elements in AVFormatContext.streams.
Definition: avformat.h:1398
SWFContext::samples_per_frame
int samples_per_frame
Definition: swf.h:127
AVIOContext::seekable
int seekable
A combination of AVIO_SEEKABLE_ flags or 0 when the stream is not seekable.
Definition: avio.h:260
avio_flush
int void avio_flush(AVIOContext *s)
Force flushing of buffered data.
Definition: aviobuf.c:238
swf_write_audio
static int swf_write_audio(AVFormatContext *s, AVCodecParameters *par, uint8_t *buf, int size)
Definition: swfenc.c:449
put_swf_tag
static void put_swf_tag(AVFormatContext *s, int tag)
Definition: swfenc.c:28
max_nbits
static void max_nbits(int *nbits_ptr, int val)
Definition: swfenc.c:66
ff_swf_muxer
AVOutputFormat ff_swf_muxer
DUMMY_FILE_SIZE
#define DUMMY_FILE_SIZE
Definition: swf.h:38
write_trailer
static int write_trailer(AVFormatContext *s1)
Definition: v4l2enc.c:94
FLAG_SETFILL0
#define FLAG_SETFILL0
Definition: swf.h:113
AVOutputFormat::name
const char * name
Definition: avformat.h:507
FFABS
#define FFABS(a)
Absolute value, Note, INT_MIN / INT64_MIN result in undefined behavior as they are not representable ...
Definition: common.h:72
n
int n
Definition: avisynth_c.h:684
TAG_END
Definition: swf.h:42
swf_write_packet
static int swf_write_packet(AVFormatContext *s, AVPacket *pkt)
Definition: swfenc.c:473
swf_write_video
static int swf_write_video(AVFormatContext *s, AVCodecParameters *par, const uint8_t *buf, int size)
Definition: swfenc.c:344
ff_avm2_muxer
AVOutputFormat ff_avm2_muxer
AVIO_SEEKABLE_NORMAL
#define AVIO_SEEKABLE_NORMAL
Seeking works like for a local file.
Definition: avio.h:40
AV_LOG_INFO
#define AV_LOG_INFO
Standard information.
Definition: log.h:187
swf_write_header
static int swf_write_header(AVFormatContext *s)
Definition: swfenc.c:174
frame_size
int frame_size
Definition: mxfenc.c:1947
av_fifo_size
int av_fifo_size(const AVFifoBuffer *f)
Return the amount of data in bytes in the AVFifoBuffer, that is the amount of data you can read from ...
Definition: fifo.c:77
AVFormatContext::pb
AVIOContext * pb
I/O context.
Definition: avformat.h:1384
avio_w8
void avio_w8(AVIOContext *s, int b)
Definition: aviobuf.c:196
buf
void * buf
Definition: avisynth_c.h:690
SWFContext::audio_par
AVCodecParameters * audio_par
Definition: swf.h:134
FRAC_BITS
#define FRAC_BITS
Definition: swfenc.c:136
SWFContext::vframes_pos
int64_t vframes_pos
Definition: swf.h:126
TAG_LONG
#define TAG_LONG
Definition: swf.h:109
AVCodecParameters::sample_rate
int sample_rate
Audio only.
Definition: avcodec.h:3994
avformat.h
Main libavformat public API header.
put_swf_end_tag
static void put_swf_end_tag(AVFormatContext *s)
Definition: swfenc.c:44
flush_put_bits
static void flush_put_bits(PutBitContext *s)
Pad the end of the output stream with zeros.
Definition: put_bits.h:101
c
static double c[64]
Definition: vsrc_mptestsrc.c:87
SWFContext::tag_pos
int64_t tag_pos
Definition: swf.h:125
init_put_bits
static void init_put_bits(PutBitContext *s, uint8_t *buffer, int buffer_size)
Initialize the PutBitContext s.
Definition: put_bits.h:48
AVRational::den
int den
Denominator.
Definition: rational.h:60
av_fifo_alloc
AVFifoBuffer * av_fifo_alloc(unsigned int size)
Initialize an AVFifoBuffer.
Definition: fifo.c:43
AVFormatContext::priv_data
void * priv_data
Format private data.
Definition: avformat.h:1370
AUDIO_FIFO_SIZE
#define AUDIO_FIFO_SIZE
Definition: swf.h:116
SWFContext::tag
int tag
Definition: swf.h:132
write_header
static void write_header(FFV1Context *f)
Definition: ffv1enc.c:337
AVCodecParameters::channels
int channels
Audio only.
Definition: avcodec.h:3990
avio_wb32
void avio_wb32(AVIOContext *s, unsigned int val)
Definition: aviobuf.c:377
AVMEDIA_TYPE_VIDEO
Definition: avutil.h:201
av_fifo_freep
void av_fifo_freep(AVFifoBuffer **f)
Free an AVFifoBuffer and reset pointer to NULL.
Definition: fifo.c:63
AVStream::codecpar
AVCodecParameters * codecpar
Codec parameters associated with this stream.
Definition: avformat.h:1020
AVPacket::stream_index
int stream_index
Definition: avcodec.h:1432
SWFContext::audio_fifo
AVFifoBuffer * audio_fifo
Definition: swf.h:133
swf_write_trailer
static int swf_write_trailer(AVFormatContext *s)
Definition: swfenc.c:482
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:902
AV_CODEC_ID_VP6F
Definition: avcodec.h:310
SWFContext::duration_pos
int64_t duration_pos
Definition: swf.h:124
put_swf_matrix
static void put_swf_matrix(AVIOContext *pb, int a, int b, int c, int d, int tx, int ty)
Definition: swfenc.c:138
AVPacket
This structure stores compressed data.
Definition: avcodec.h:1407
a
a
Definition: h264pred_template.c:468
FLAG_MOVETO
#define FLAG_MOVETO
Definition: swf.h:112
put_bits.h
bitstream writer API
Generated on Sun May 13 2018 02:04:07 for FFmpeg by   doxygen 1.8.6

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