asfenc.c
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1 /*
2  * ASF muxer
3  * Copyright (c) 2000, 2001 Fabrice Bellard
4  *
5  * This file is part of Libav.
6  *
7  * Libav is free software; you can redistribute it and/or
8  * modify it under the terms of the GNU Lesser General Public
9  * License as published by the Free Software Foundation; either
10  * version 2.1 of the License, or (at your option) any later version.
11  *
12  * Libav is distributed in the hope that it will be useful,
13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15  * Lesser General Public License for more details.
16  *
17  * You should have received a copy of the GNU Lesser General Public
18  * License along with Libav; if not, write to the Free Software
19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20  */
21 #include "avformat.h"
22 #include "internal.h"
23 #include "riff.h"
24 #include "asf.h"
25 #include "avio_internal.h"
26 #include "libavutil/dict.h"
27 
28 #undef NDEBUG
29 #include <assert.h>
30 
31 
32 #define ASF_INDEXED_INTERVAL 10000000
33 #define ASF_INDEX_BLOCK 600
34 
35 #define ASF_PACKET_ERROR_CORRECTION_DATA_SIZE 0x2
36 #define ASF_PACKET_ERROR_CORRECTION_FLAGS (\
37  ASF_PACKET_FLAG_ERROR_CORRECTION_PRESENT | \
38  ASF_PACKET_ERROR_CORRECTION_DATA_SIZE\
39  )
40 
41 #if (ASF_PACKET_ERROR_CORRECTION_FLAGS != 0)
42 # define ASF_PACKET_ERROR_CORRECTION_FLAGS_FIELD_SIZE 1
43 #else
44 # define ASF_PACKET_ERROR_CORRECTION_FLAGS_FIELD_SIZE 0
45 #endif
46 
47 #define ASF_PPI_PROPERTY_FLAGS (\
48  ASF_PL_FLAG_REPLICATED_DATA_LENGTH_FIELD_IS_BYTE | \
49  ASF_PL_FLAG_OFFSET_INTO_MEDIA_OBJECT_LENGTH_FIELD_IS_DWORD | \
50  ASF_PL_FLAG_MEDIA_OBJECT_NUMBER_LENGTH_FIELD_IS_BYTE | \
51  ASF_PL_FLAG_STREAM_NUMBER_LENGTH_FIELD_IS_BYTE \
52  )
53 
54 #define ASF_PPI_LENGTH_TYPE_FLAGS 0
55 
56 #define ASF_PAYLOAD_FLAGS ASF_PL_FLAG_PAYLOAD_LENGTH_FIELD_IS_WORD
57 
58 #if (ASF_PPI_FLAG_SEQUENCE_FIELD_IS_BYTE == (ASF_PPI_LENGTH_TYPE_FLAGS & ASF_PPI_MASK_SEQUENCE_FIELD_SIZE))
59 # define ASF_PPI_SEQUENCE_FIELD_SIZE 1
60 #endif
61 #if (ASF_PPI_FLAG_SEQUENCE_FIELD_IS_WORD == (ASF_PPI_LENGTH_TYPE_FLAGS & ASF_PPI_MASK_SEQUENCE_FIELD_SIZE))
62 # define ASF_PPI_SEQUENCE_FIELD_SIZE 2
63 #endif
64 #if (ASF_PPI_FLAG_SEQUENCE_FIELD_IS_DWORD == (ASF_PPI_LENGTH_TYPE_FLAGS & ASF_PPI_MASK_SEQUENCE_FIELD_SIZE))
65 # define ASF_PPI_SEQUENCE_FIELD_SIZE 4
66 #endif
67 #ifndef ASF_PPI_SEQUENCE_FIELD_SIZE
68 # define ASF_PPI_SEQUENCE_FIELD_SIZE 0
69 #endif
70 
71 
72 #if (ASF_PPI_FLAG_PACKET_LENGTH_FIELD_IS_BYTE == (ASF_PPI_LENGTH_TYPE_FLAGS & ASF_PPI_MASK_PACKET_LENGTH_FIELD_SIZE))
73 # define ASF_PPI_PACKET_LENGTH_FIELD_SIZE 1
74 #endif
75 #if (ASF_PPI_FLAG_PACKET_LENGTH_FIELD_IS_WORD == (ASF_PPI_LENGTH_TYPE_FLAGS & ASF_PPI_MASK_PACKET_LENGTH_FIELD_SIZE))
76 # define ASF_PPI_PACKET_LENGTH_FIELD_SIZE 2
77 #endif
78 #if (ASF_PPI_FLAG_PACKET_LENGTH_FIELD_IS_DWORD == (ASF_PPI_LENGTH_TYPE_FLAGS & ASF_PPI_MASK_PACKET_LENGTH_FIELD_SIZE))
79 # define ASF_PPI_PACKET_LENGTH_FIELD_SIZE 4
80 #endif
81 #ifndef ASF_PPI_PACKET_LENGTH_FIELD_SIZE
82 # define ASF_PPI_PACKET_LENGTH_FIELD_SIZE 0
83 #endif
84 
85 #if (ASF_PPI_FLAG_PADDING_LENGTH_FIELD_IS_BYTE == (ASF_PPI_LENGTH_TYPE_FLAGS & ASF_PPI_MASK_PADDING_LENGTH_FIELD_SIZE))
86 # define ASF_PPI_PADDING_LENGTH_FIELD_SIZE 1
87 #endif
88 #if (ASF_PPI_FLAG_PADDING_LENGTH_FIELD_IS_WORD == (ASF_PPI_LENGTH_TYPE_FLAGS & ASF_PPI_MASK_PADDING_LENGTH_FIELD_SIZE))
89 # define ASF_PPI_PADDING_LENGTH_FIELD_SIZE 2
90 #endif
91 #if (ASF_PPI_FLAG_PADDING_LENGTH_FIELD_IS_DWORD == (ASF_PPI_LENGTH_TYPE_FLAGS & ASF_PPI_MASK_PADDING_LENGTH_FIELD_SIZE))
92 # define ASF_PPI_PADDING_LENGTH_FIELD_SIZE 4
93 #endif
94 #ifndef ASF_PPI_PADDING_LENGTH_FIELD_SIZE
95 # define ASF_PPI_PADDING_LENGTH_FIELD_SIZE 0
96 #endif
97 
98 #if (ASF_PL_FLAG_REPLICATED_DATA_LENGTH_FIELD_IS_BYTE == (ASF_PPI_PROPERTY_FLAGS & ASF_PL_MASK_REPLICATED_DATA_LENGTH_FIELD_SIZE))
99 # define ASF_PAYLOAD_REPLICATED_DATA_LENGTH_FIELD_SIZE 1
100 #endif
101 #if (ASF_PL_FLAG_REPLICATED_DATA_LENGTH_FIELD_IS_WORD == (ASF_PPI_PROPERTY_FLAGS & ASF_PL_MASK_REPLICATED_DATA_LENGTH_FIELD_SIZE))
102 # define ASF_PAYLOAD_REPLICATED_DATA_LENGTH_FIELD_SIZE 2
103 #endif
104 #if (ASF_PL_FLAG_REPLICATED_DATA_LENGTH_FIELD_IS_DWORD == (ASF_PPI_PROPERTY_FLAGS & ASF_PL_MASK_REPLICATED_DATA_LENGTH_FIELD_SIZE))
105 # define ASF_PAYLOAD_REPLICATED_DATA_LENGTH_FIELD_SIZE 4
106 #endif
107 #ifndef ASF_PAYLOAD_REPLICATED_DATA_LENGTH_FIELD_SIZE
108 # define ASF_PAYLOAD_REPLICATED_DATA_LENGTH_FIELD_SIZE 0
109 #endif
110 
111 #if (ASF_PL_FLAG_OFFSET_INTO_MEDIA_OBJECT_LENGTH_FIELD_IS_BYTE == (ASF_PPI_PROPERTY_FLAGS & ASF_PL_MASK_OFFSET_INTO_MEDIA_OBJECT_LENGTH_FIELD_SIZE))
112 # define ASF_PAYLOAD_OFFSET_INTO_MEDIA_OBJECT_FIELD_SIZE 1
113 #endif
114 #if (ASF_PL_FLAG_OFFSET_INTO_MEDIA_OBJECT_LENGTH_FIELD_IS_WORD == (ASF_PPI_PROPERTY_FLAGS & ASF_PL_MASK_OFFSET_INTO_MEDIA_OBJECT_LENGTH_FIELD_SIZE))
115 # define ASF_PAYLOAD_OFFSET_INTO_MEDIA_OBJECT_FIELD_SIZE 2
116 #endif
117 #if (ASF_PL_FLAG_OFFSET_INTO_MEDIA_OBJECT_LENGTH_FIELD_IS_DWORD == (ASF_PPI_PROPERTY_FLAGS & ASF_PL_MASK_OFFSET_INTO_MEDIA_OBJECT_LENGTH_FIELD_SIZE))
118 # define ASF_PAYLOAD_OFFSET_INTO_MEDIA_OBJECT_FIELD_SIZE 4
119 #endif
120 #ifndef ASF_PAYLOAD_OFFSET_INTO_MEDIA_OBJECT_FIELD_SIZE
121 # define ASF_PAYLOAD_OFFSET_INTO_MEDIA_OBJECT_FIELD_SIZE 0
122 #endif
123 
124 #if (ASF_PL_FLAG_MEDIA_OBJECT_NUMBER_LENGTH_FIELD_IS_BYTE == (ASF_PPI_PROPERTY_FLAGS & ASF_PL_MASK_MEDIA_OBJECT_NUMBER_LENGTH_FIELD_SIZE))
125 # define ASF_PAYLOAD_MEDIA_OBJECT_NUMBER_FIELD_SIZE 1
126 #endif
127 #if (ASF_PL_FLAG_MEDIA_OBJECT_NUMBER_LENGTH_FIELD_IS_WORD == (ASF_PPI_PROPERTY_FLAGS & ASF_PL_MASK_MEDIA_OBJECT_NUMBER_LENGTH_FIELD_SIZE))
128 # define ASF_PAYLOAD_MEDIA_OBJECT_NUMBER_FIELD_SIZE 2
129 #endif
130 #if (ASF_PL_FLAG_MEDIA_OBJECT_NUMBER_LENGTH_FIELD_IS_DWORD == (ASF_PPI_PROPERTY_FLAGS & ASF_PL_MASK_MEDIA_OBJECT_NUMBER_LENGTH_FIELD_SIZE))
131 # define ASF_PAYLOAD_MEDIA_OBJECT_NUMBER_FIELD_SIZE 4
132 #endif
133 #ifndef ASF_PAYLOAD_MEDIA_OBJECT_NUMBER_FIELD_SIZE
134 # define ASF_PAYLOAD_MEDIA_OBJECT_NUMBER_FIELD_SIZE 0
135 #endif
136 
137 #if (ASF_PL_FLAG_PAYLOAD_LENGTH_FIELD_IS_BYTE == (ASF_PAYLOAD_FLAGS & ASF_PL_MASK_PAYLOAD_LENGTH_FIELD_SIZE))
138 # define ASF_PAYLOAD_LENGTH_FIELD_SIZE 1
139 #endif
140 #if (ASF_PL_FLAG_PAYLOAD_LENGTH_FIELD_IS_WORD == (ASF_PAYLOAD_FLAGS & ASF_PL_MASK_PAYLOAD_LENGTH_FIELD_SIZE))
141 # define ASF_PAYLOAD_LENGTH_FIELD_SIZE 2
142 #endif
143 #ifndef ASF_PAYLOAD_LENGTH_FIELD_SIZE
144 # define ASF_PAYLOAD_LENGTH_FIELD_SIZE 0
145 #endif
146 
147 #define PACKET_HEADER_MIN_SIZE (\
148  ASF_PACKET_ERROR_CORRECTION_FLAGS_FIELD_SIZE + \
149  ASF_PACKET_ERROR_CORRECTION_DATA_SIZE + \
150  1 + /*Length Type Flags*/ \
151  1 + /*Property Flags*/ \
152  ASF_PPI_PACKET_LENGTH_FIELD_SIZE + \
153  ASF_PPI_SEQUENCE_FIELD_SIZE + \
154  ASF_PPI_PADDING_LENGTH_FIELD_SIZE + \
155  4 + /*Send Time Field*/ \
156  2 /*Duration Field*/ \
157  )
158 
159 
160 // Replicated Data shall be at least 8 bytes long.
161 #define ASF_PAYLOAD_REPLICATED_DATA_LENGTH 0x08
162 
163 #define PAYLOAD_HEADER_SIZE_SINGLE_PAYLOAD (\
164  1 + /*Stream Number*/ \
165  ASF_PAYLOAD_MEDIA_OBJECT_NUMBER_FIELD_SIZE + \
166  ASF_PAYLOAD_OFFSET_INTO_MEDIA_OBJECT_FIELD_SIZE + \
167  ASF_PAYLOAD_REPLICATED_DATA_LENGTH_FIELD_SIZE + \
168  ASF_PAYLOAD_REPLICATED_DATA_LENGTH \
169  )
170 
171 #define PAYLOAD_HEADER_SIZE_MULTIPLE_PAYLOADS (\
172  1 + /*Stream Number*/ \
173  ASF_PAYLOAD_MEDIA_OBJECT_NUMBER_FIELD_SIZE + \
174  ASF_PAYLOAD_OFFSET_INTO_MEDIA_OBJECT_FIELD_SIZE + \
175  ASF_PAYLOAD_REPLICATED_DATA_LENGTH_FIELD_SIZE + \
176  ASF_PAYLOAD_REPLICATED_DATA_LENGTH + \
177  ASF_PAYLOAD_LENGTH_FIELD_SIZE \
178  )
179 
180 #define SINGLE_PAYLOAD_DATA_LENGTH (\
181  PACKET_SIZE - \
182  PACKET_HEADER_MIN_SIZE - \
183  PAYLOAD_HEADER_SIZE_SINGLE_PAYLOAD \
184  )
185 
186 #define MULTI_PAYLOAD_CONSTANT (\
187  PACKET_SIZE - \
188  PACKET_HEADER_MIN_SIZE - \
189  1 - /*Payload Flags*/ \
190  2*PAYLOAD_HEADER_SIZE_MULTIPLE_PAYLOADS \
191  )
192 
193 typedef struct {
194  uint32_t seqno;
196  ASFStream streams[128];
197  /* non streamed additonnal info */
198  uint64_t nb_packets;
199  int64_t duration;
200  /* packet filling */
201  unsigned char multi_payloads_present;
202  int packet_size_left;
205  unsigned int packet_nb_payloads;
206  uint8_t packet_buf[PACKET_SIZE];
208  /* only for reading */
209  uint64_t data_offset;
210 
213  uint32_t nb_index_count;
215  uint16_t maximum_packet;
216 } ASFContext;
217 
218 static const AVCodecTag codec_asf_bmp_tags[] = {
219  { CODEC_ID_MPEG4, MKTAG('M', 'P', '4', 'S') },
220  { CODEC_ID_MPEG4, MKTAG('M', '4', 'S', '2') },
221  { CODEC_ID_MSMPEG4V3, MKTAG('M', 'P', '4', '3') },
222  { CODEC_ID_NONE, 0 },
223 };
224 
225 #define PREROLL_TIME 3100
226 
227 static void put_guid(AVIOContext *s, const ff_asf_guid *g)
228 {
229  assert(sizeof(*g) == 16);
230  avio_write(s, *g, sizeof(*g));
231 }
232 
233 static void put_str16(AVIOContext *s, const char *tag)
234 {
235  int len;
236  uint8_t *pb;
237  AVIOContext *dyn_buf;
238  if (avio_open_dyn_buf(&dyn_buf) < 0)
239  return;
240 
241  avio_put_str16le(dyn_buf, tag);
242  len = avio_close_dyn_buf(dyn_buf, &pb);
243  avio_wl16(s, len);
244  avio_write(s, pb, len);
245  av_freep(&pb);
246 }
247 
248 static int64_t put_header(AVIOContext *pb, const ff_asf_guid *g)
249 {
250  int64_t pos;
251 
252  pos = avio_tell(pb);
253  put_guid(pb, g);
254  avio_wl64(pb, 24);
255  return pos;
256 }
257 
258 /* update header size */
259 static void end_header(AVIOContext *pb, int64_t pos)
260 {
261  int64_t pos1;
262 
263  pos1 = avio_tell(pb);
264  avio_seek(pb, pos + 16, SEEK_SET);
265  avio_wl64(pb, pos1 - pos);
266  avio_seek(pb, pos1, SEEK_SET);
267 }
268 
269 /* write an asf chunk (only used in streaming case) */
270 static void put_chunk(AVFormatContext *s, int type, int payload_length, int flags)
271 {
272  ASFContext *asf = s->priv_data;
273  AVIOContext *pb = s->pb;
274  int length;
275 
276  length = payload_length + 8;
277  avio_wl16(pb, type);
278  avio_wl16(pb, length); //size
279  avio_wl32(pb, asf->seqno);//sequence number
280  avio_wl16(pb, flags); /* unknown bytes */
281  avio_wl16(pb, length); //size_confirm
282  asf->seqno++;
283 }
284 
285 /* convert from unix to windows time */
286 static int64_t unix_to_file_time(int ti)
287 {
288  int64_t t;
289 
290  t = ti * INT64_C(10000000);
291  t += INT64_C(116444736000000000);
292  return t;
293 }
294 
295 /* write the header (used two times if non streamed) */
296 static int asf_write_header1(AVFormatContext *s, int64_t file_size, int64_t data_chunk_size)
297 {
298  ASFContext *asf = s->priv_data;
299  AVIOContext *pb = s->pb;
300  AVDictionaryEntry *tags[5];
301  int header_size, n, extra_size, extra_size2, wav_extra_size, file_time;
302  int has_title;
303  int metadata_count;
304  AVCodecContext *enc;
305  int64_t header_offset, cur_pos, hpos;
306  int bit_rate;
307  int64_t duration;
308 
310 
311  tags[0] = av_dict_get(s->metadata, "title" , NULL, 0);
312  tags[1] = av_dict_get(s->metadata, "author" , NULL, 0);
313  tags[2] = av_dict_get(s->metadata, "copyright", NULL, 0);
314  tags[3] = av_dict_get(s->metadata, "comment" , NULL, 0);
315  tags[4] = av_dict_get(s->metadata, "rating" , NULL, 0);
316 
317  duration = asf->duration + PREROLL_TIME * 10000;
318  has_title = tags[0] || tags[1] || tags[2] || tags[3] || tags[4];
319  metadata_count = s->metadata ? s->metadata->count : 0;
320 
321  bit_rate = 0;
322  for(n=0;n<s->nb_streams;n++) {
323  enc = s->streams[n]->codec;
324 
325  avpriv_set_pts_info(s->streams[n], 32, 1, 1000); /* 32 bit pts in ms */
326 
327  bit_rate += enc->bit_rate;
328  }
329 
330  if (asf->is_streamed) {
331  put_chunk(s, 0x4824, 0, 0xc00); /* start of stream (length will be patched later) */
332  }
333 
334  put_guid(pb, &ff_asf_header);
335  avio_wl64(pb, -1); /* header length, will be patched after */
336  avio_wl32(pb, 3 + has_title + !!metadata_count + s->nb_streams); /* number of chunks in header */
337  avio_w8(pb, 1); /* ??? */
338  avio_w8(pb, 2); /* ??? */
339 
340  /* file header */
341  header_offset = avio_tell(pb);
342  hpos = put_header(pb, &ff_asf_file_header);
343  put_guid(pb, &ff_asf_my_guid);
344  avio_wl64(pb, file_size);
345  file_time = 0;
346  avio_wl64(pb, unix_to_file_time(file_time));
347  avio_wl64(pb, asf->nb_packets); /* number of packets */
348  avio_wl64(pb, duration); /* end time stamp (in 100ns units) */
349  avio_wl64(pb, asf->duration); /* duration (in 100ns units) */
350  avio_wl64(pb, PREROLL_TIME); /* start time stamp */
351  avio_wl32(pb, (asf->is_streamed || !pb->seekable ) ? 3 : 2); /* ??? */
352  avio_wl32(pb, s->packet_size); /* packet size */
353  avio_wl32(pb, s->packet_size); /* packet size */
354  avio_wl32(pb, bit_rate); /* Nominal data rate in bps */
355  end_header(pb, hpos);
356 
357  /* unknown headers */
358  hpos = put_header(pb, &ff_asf_head1_guid);
360  avio_wl32(pb, 6);
361  avio_wl16(pb, 0);
362  end_header(pb, hpos);
363 
364  /* title and other infos */
365  if (has_title) {
366  int len;
367  uint8_t *buf;
368  AVIOContext *dyn_buf;
369 
370  if (avio_open_dyn_buf(&dyn_buf) < 0)
371  return AVERROR(ENOMEM);
372 
373  hpos = put_header(pb, &ff_asf_comment_header);
374 
375  for (n = 0; n < FF_ARRAY_ELEMS(tags); n++) {
376  len = tags[n] ? avio_put_str16le(dyn_buf, tags[n]->value) : 0;
377  avio_wl16(pb, len);
378  }
379  len = avio_close_dyn_buf(dyn_buf, &buf);
380  avio_write(pb, buf, len);
381  av_freep(&buf);
382  end_header(pb, hpos);
383  }
384  if (metadata_count) {
387  avio_wl16(pb, metadata_count);
388  while ((tag = av_dict_get(s->metadata, "", tag, AV_DICT_IGNORE_SUFFIX))) {
389  put_str16(pb, tag->key);
390  avio_wl16(pb, 0);
391  put_str16(pb, tag->value);
392  }
393  end_header(pb, hpos);
394  }
395 
396  /* stream headers */
397  for(n=0;n<s->nb_streams;n++) {
398  int64_t es_pos;
399  // ASFStream *stream = &asf->streams[n];
400 
401  enc = s->streams[n]->codec;
402  asf->streams[n].num = n + 1;
403  asf->streams[n].seq = 0;
404 
405 
406  switch(enc->codec_type) {
407  case AVMEDIA_TYPE_AUDIO:
408  wav_extra_size = 0;
409  extra_size = 18 + wav_extra_size;
410  extra_size2 = 8;
411  break;
412  default:
413  case AVMEDIA_TYPE_VIDEO:
414  wav_extra_size = enc->extradata_size;
415  extra_size = 0x33 + wav_extra_size;
416  extra_size2 = 0;
417  break;
418  }
419 
420  hpos = put_header(pb, &ff_asf_stream_header);
421  if (enc->codec_type == AVMEDIA_TYPE_AUDIO) {
424  } else {
427  }
428  avio_wl64(pb, 0); /* ??? */
429  es_pos = avio_tell(pb);
430  avio_wl32(pb, extra_size); /* wav header len */
431  avio_wl32(pb, extra_size2); /* additional data len */
432  avio_wl16(pb, n + 1); /* stream number */
433  avio_wl32(pb, 0); /* ??? */
434 
435  if (enc->codec_type == AVMEDIA_TYPE_AUDIO) {
436  /* WAVEFORMATEX header */
437  int wavsize = ff_put_wav_header(pb, enc);
438 
439  if (wavsize < 0)
440  return -1;
441  if (wavsize != extra_size) {
442  cur_pos = avio_tell(pb);
443  avio_seek(pb, es_pos, SEEK_SET);
444  avio_wl32(pb, wavsize); /* wav header len */
445  avio_seek(pb, cur_pos, SEEK_SET);
446  }
447  /* ERROR Correction */
448  avio_w8(pb, 0x01);
449  if(enc->codec_id == CODEC_ID_ADPCM_G726 || !enc->block_align){
450  avio_wl16(pb, 0x0190);
451  avio_wl16(pb, 0x0190);
452  }else{
453  avio_wl16(pb, enc->block_align);
454  avio_wl16(pb, enc->block_align);
455  }
456  avio_wl16(pb, 0x01);
457  avio_w8(pb, 0x00);
458  } else {
459  avio_wl32(pb, enc->width);
460  avio_wl32(pb, enc->height);
461  avio_w8(pb, 2); /* ??? */
462  avio_wl16(pb, 40 + enc->extradata_size); /* size */
463 
464  /* BITMAPINFOHEADER header */
466  }
467  end_header(pb, hpos);
468  }
469 
470  /* media comments */
471 
474  avio_wl32(pb, s->nb_streams);
475  for(n=0;n<s->nb_streams;n++) {
476  AVCodec *p;
477  const char *desc;
478  int len;
479  uint8_t *buf;
480  AVIOContext *dyn_buf;
481 
482  enc = s->streams[n]->codec;
483  p = avcodec_find_encoder(enc->codec_id);
484 
485  if(enc->codec_type == AVMEDIA_TYPE_AUDIO)
486  avio_wl16(pb, 2);
487  else if(enc->codec_type == AVMEDIA_TYPE_VIDEO)
488  avio_wl16(pb, 1);
489  else
490  avio_wl16(pb, -1);
491 
492  if(enc->codec_id == CODEC_ID_WMAV2)
493  desc = "Windows Media Audio V8";
494  else
495  desc = p ? p->name : enc->codec_name;
496 
497  if ( avio_open_dyn_buf(&dyn_buf) < 0)
498  return AVERROR(ENOMEM);
499 
500  avio_put_str16le(dyn_buf, desc);
501  len = avio_close_dyn_buf(dyn_buf, &buf);
502  avio_wl16(pb, len / 2); // "number of characters" = length in bytes / 2
503 
504  avio_write(pb, buf, len);
505  av_freep(&buf);
506 
507  avio_wl16(pb, 0); /* no parameters */
508 
509 
510  /* id */
511  if (enc->codec_type == AVMEDIA_TYPE_AUDIO) {
512  avio_wl16(pb, 2);
513  avio_wl16(pb, enc->codec_tag);
514  } else {
515  avio_wl16(pb, 4);
516  avio_wl32(pb, enc->codec_tag);
517  }
518  if(!enc->codec_tag)
519  return -1;
520  }
521  end_header(pb, hpos);
522 
523  /* patch the header size fields */
524 
525  cur_pos = avio_tell(pb);
526  header_size = cur_pos - header_offset;
527  if (asf->is_streamed) {
528  header_size += 8 + 30 + 50;
529 
530  avio_seek(pb, header_offset - 10 - 30, SEEK_SET);
531  avio_wl16(pb, header_size);
532  avio_seek(pb, header_offset - 2 - 30, SEEK_SET);
533  avio_wl16(pb, header_size);
534 
535  header_size -= 8 + 30 + 50;
536  }
537  header_size += 24 + 6;
538  avio_seek(pb, header_offset - 14, SEEK_SET);
539  avio_wl64(pb, header_size);
540  avio_seek(pb, cur_pos, SEEK_SET);
541 
542  /* movie chunk, followed by packets of packet_size */
543  asf->data_offset = cur_pos;
545  avio_wl64(pb, data_chunk_size);
546  put_guid(pb, &ff_asf_my_guid);
547  avio_wl64(pb, asf->nb_packets); /* nb packets */
548  avio_w8(pb, 1); /* ??? */
549  avio_w8(pb, 1); /* ??? */
550  return 0;
551 }
552 
554 {
555  ASFContext *asf = s->priv_data;
556 
558  asf->nb_packets = 0;
559 
560  asf->last_indexed_pts = 0;
561  asf->index_ptr = av_malloc( sizeof(ASFIndex) * ASF_INDEX_BLOCK );
563  asf->nb_index_count = 0;
564  asf->maximum_packet = 0;
565 
566  /* the data-chunk-size has to be 50, which is data_size - asf->data_offset
567  * at the moment this function is done. It is needed to use asf as
568  * streamable format. */
569  if (asf_write_header1(s, 0, 50) < 0) {
570  //av_free(asf);
571  return -1;
572  }
573 
574  avio_flush(s->pb);
575 
576  asf->packet_nb_payloads = 0;
577  asf->packet_timestamp_start = -1;
578  asf->packet_timestamp_end = -1;
579  ffio_init_context(&asf->pb, asf->packet_buf, s->packet_size, 1,
580  NULL, NULL, NULL, NULL);
581 
582  return 0;
583 }
584 
586 {
587  ASFContext *asf = s->priv_data;
588 
589  asf->is_streamed = 1;
590 
591  return asf_write_header(s);
592 }
593 
595  AVFormatContext *s,
596  unsigned int sendtime,
597  unsigned int duration,
598  int nb_payloads,
599  int padsize
600  )
601 {
602  ASFContext *asf = s->priv_data;
603  AVIOContext *pb = s->pb;
604  int ppi_size, i;
605  int64_t start= avio_tell(pb);
606 
607  int iLengthTypeFlags = ASF_PPI_LENGTH_TYPE_FLAGS;
608 
609  padsize -= PACKET_HEADER_MIN_SIZE;
610  if(asf->multi_payloads_present)
611  padsize--;
612  assert(padsize>=0);
613 
615  for (i = 0; i < ASF_PACKET_ERROR_CORRECTION_DATA_SIZE; i++){
616  avio_w8(pb, 0x0);
617  }
618 
619  if (asf->multi_payloads_present)
620  iLengthTypeFlags |= ASF_PPI_FLAG_MULTIPLE_PAYLOADS_PRESENT;
621 
622  if (padsize > 0) {
623  if (padsize < 256)
624  iLengthTypeFlags |= ASF_PPI_FLAG_PADDING_LENGTH_FIELD_IS_BYTE;
625  else
626  iLengthTypeFlags |= ASF_PPI_FLAG_PADDING_LENGTH_FIELD_IS_WORD;
627  }
628  avio_w8(pb, iLengthTypeFlags);
629 
631 
632  if (iLengthTypeFlags & ASF_PPI_FLAG_PADDING_LENGTH_FIELD_IS_WORD)
633  avio_wl16(pb, padsize - 2);
634  if (iLengthTypeFlags & ASF_PPI_FLAG_PADDING_LENGTH_FIELD_IS_BYTE)
635  avio_w8(pb, padsize - 1);
636 
637  avio_wl32(pb, sendtime);
638  avio_wl16(pb, duration);
639  if (asf->multi_payloads_present)
640  avio_w8(pb, nb_payloads | ASF_PAYLOAD_FLAGS);
641 
642  ppi_size = avio_tell(pb) - start;
643 
644  return ppi_size;
645 }
646 
648 {
649  ASFContext *asf = s->priv_data;
650  int packet_hdr_size, packet_filled_size;
651 
652  assert(asf->packet_timestamp_end >= asf->packet_timestamp_start);
653 
654  if (asf->is_streamed) {
655  put_chunk(s, 0x4424, s->packet_size, 0);
656  }
657 
658  packet_hdr_size = put_payload_parsing_info(
659  s,
662  asf->packet_nb_payloads,
663  asf->packet_size_left
664  );
665 
666  packet_filled_size = PACKET_SIZE - asf->packet_size_left;
667  assert(packet_hdr_size <= asf->packet_size_left);
668  memset(asf->packet_buf + packet_filled_size, 0, asf->packet_size_left);
669 
670  avio_write(s->pb, asf->packet_buf, s->packet_size - packet_hdr_size);
671 
672  avio_flush(s->pb);
673  asf->nb_packets++;
674  asf->packet_nb_payloads = 0;
675  asf->packet_timestamp_start = -1;
676  asf->packet_timestamp_end = -1;
677  ffio_init_context(&asf->pb, asf->packet_buf, s->packet_size, 1,
678  NULL, NULL, NULL, NULL);
679 }
680 
681 static void put_payload_header(
682  AVFormatContext *s,
683  ASFStream *stream,
684  int presentation_time,
685  int m_obj_size,
686  int m_obj_offset,
687  int payload_len,
688  int flags
689  )
690 {
691  ASFContext *asf = s->priv_data;
692  AVIOContext *pb = &asf->pb;
693  int val;
694 
695  val = stream->num;
696  if (flags & AV_PKT_FLAG_KEY)
697  val |= ASF_PL_FLAG_KEY_FRAME;
698  avio_w8(pb, val);
699 
700  avio_w8(pb, stream->seq); //Media object number
701  avio_wl32(pb, m_obj_offset); //Offset Into Media Object
702 
703  // Replicated Data shall be at least 8 bytes long.
704  // The first 4 bytes of data shall contain the
705  // Size of the Media Object that the payload belongs to.
706  // The next 4 bytes of data shall contain the
707  // Presentation Time for the media object that the payload belongs to.
709 
710  avio_wl32(pb, m_obj_size); //Replicated Data - Media Object Size
711  avio_wl32(pb, presentation_time);//Replicated Data - Presentation Time
712 
713  if (asf->multi_payloads_present){
714  avio_wl16(pb, payload_len); //payload length
715  }
716 }
717 
718 static void put_frame(
719  AVFormatContext *s,
720  ASFStream *stream,
721  AVStream *avst,
722  int timestamp,
723  const uint8_t *buf,
724  int m_obj_size,
725  int flags
726  )
727 {
728  ASFContext *asf = s->priv_data;
729  int m_obj_offset, payload_len, frag_len1;
730 
731  m_obj_offset = 0;
732  while (m_obj_offset < m_obj_size) {
733  payload_len = m_obj_size - m_obj_offset;
734  if (asf->packet_timestamp_start == -1) {
735  asf->multi_payloads_present = (payload_len < MULTI_PAYLOAD_CONSTANT);
736 
738  if (asf->multi_payloads_present){
739  frag_len1 = MULTI_PAYLOAD_CONSTANT - 1;
740  }
741  else {
742  frag_len1 = SINGLE_PAYLOAD_DATA_LENGTH;
743  }
744  asf->packet_timestamp_start = timestamp;
745  }
746  else {
747  // multi payloads
749 
750  if(frag_len1 < payload_len && avst->codec->codec_type == AVMEDIA_TYPE_AUDIO){
751  flush_packet(s);
752  continue;
753  }
754  }
755  if (frag_len1 > 0) {
756  if (payload_len > frag_len1)
757  payload_len = frag_len1;
758  else if (payload_len == (frag_len1 - 1))
759  payload_len = frag_len1 - 2; //additional byte need to put padding length
760 
761  put_payload_header(s, stream, timestamp+PREROLL_TIME, m_obj_size, m_obj_offset, payload_len, flags);
762  avio_write(&asf->pb, buf, payload_len);
763 
764  if (asf->multi_payloads_present)
766  else
768  asf->packet_timestamp_end = timestamp;
769 
770  asf->packet_nb_payloads++;
771  } else {
772  payload_len = 0;
773  }
774  m_obj_offset += payload_len;
775  buf += payload_len;
776 
777  if (!asf->multi_payloads_present)
778  flush_packet(s);
780  flush_packet(s);
781  }
782  stream->seq++;
783 }
784 
786 {
787  ASFContext *asf = s->priv_data;
788  ASFStream *stream;
789  int64_t duration;
790  AVCodecContext *codec;
791  int64_t packet_st,pts;
792  int start_sec,i;
793  int flags= pkt->flags;
794 
795  codec = s->streams[pkt->stream_index]->codec;
796  stream = &asf->streams[pkt->stream_index];
797 
798  if(codec->codec_type == AVMEDIA_TYPE_AUDIO)
799  flags &= ~AV_PKT_FLAG_KEY;
800 
801  pts = (pkt->pts != AV_NOPTS_VALUE) ? pkt->pts : pkt->dts;
802  assert(pts != AV_NOPTS_VALUE);
803  duration = pts * 10000;
804  asf->duration= FFMAX(asf->duration, duration + pkt->duration * 10000);
805 
806  packet_st = asf->nb_packets;
807  put_frame(s, stream, s->streams[pkt->stream_index], pkt->dts, pkt->data, pkt->size, flags);
808 
809  /* check index */
810  if ((!asf->is_streamed) && (flags & AV_PKT_FLAG_KEY)) {
811  start_sec = (int)(duration / INT64_C(10000000));
812  if (start_sec != (int)(asf->last_indexed_pts / INT64_C(10000000))) {
813  for(i=asf->nb_index_count;i<start_sec;i++) {
814  if (i>=asf->nb_index_memory_alloc) {
816  asf->index_ptr = (ASFIndex*)av_realloc( asf->index_ptr, sizeof(ASFIndex) * asf->nb_index_memory_alloc );
817  }
818  // store
819  asf->index_ptr[i].packet_number = (uint32_t)packet_st;
820  asf->index_ptr[i].packet_count = (uint16_t)(asf->nb_packets-packet_st);
821  asf->maximum_packet = FFMAX(asf->maximum_packet, (uint16_t)(asf->nb_packets-packet_st));
822  }
823  asf->nb_index_count = start_sec;
824  asf->last_indexed_pts = duration;
825  }
826  }
827  return 0;
828 }
829 
830 //
831 static int asf_write_index(AVFormatContext *s, ASFIndex *index, uint16_t max, uint32_t count)
832 {
833  AVIOContext *pb = s->pb;
834  int i;
835 
837  avio_wl64(pb, 24 + 16 + 8 + 4 + 4 + (4 + 2)*count);
838  put_guid(pb, &ff_asf_my_guid);
840  avio_wl32(pb, max);
841  avio_wl32(pb, count);
842  for(i=0; i<count; i++) {
843  avio_wl32(pb, index[i].packet_number);
844  avio_wl16(pb, index[i].packet_count);
845  }
846 
847  return 0;
848 }
849 
851 {
852  ASFContext *asf = s->priv_data;
853  int64_t file_size,data_size;
854 
855  /* flush the current packet */
856  if (asf->pb.buf_ptr > asf->pb.buffer)
857  flush_packet(s);
858 
859  /* write index */
860  data_size = avio_tell(s->pb);
861  if ((!asf->is_streamed) && (asf->nb_index_count != 0)) {
863  }
864  avio_flush(s->pb);
865 
866  if (asf->is_streamed || !s->pb->seekable) {
867  put_chunk(s, 0x4524, 0, 0); /* end of stream */
868  } else {
869  /* rewrite an updated header */
870  file_size = avio_tell(s->pb);
871  avio_seek(s->pb, 0, SEEK_SET);
872  asf_write_header1(s, file_size, data_size - asf->data_offset);
873  }
874 
875  avio_flush(s->pb);
876  av_free(asf->index_ptr);
877  return 0;
878 }
879 
880 #if CONFIG_ASF_MUXER
881 AVOutputFormat ff_asf_muxer = {
882  .name = "asf",
883  .long_name = NULL_IF_CONFIG_SMALL("ASF format"),
884  .mime_type = "video/x-ms-asf",
885  .extensions = "asf,wmv,wma",
886  .priv_data_size = sizeof(ASFContext),
888  .audio_codec = CODEC_ID_MP3,
889 #else
890  .audio_codec = CODEC_ID_MP2,
891 #endif
892  .video_codec = CODEC_ID_MSMPEG4V3,
897  .codec_tag= (const AVCodecTag* const []){codec_asf_bmp_tags, ff_codec_bmp_tags, ff_codec_wav_tags, 0},
898 };
899 #endif
900 
901 #if CONFIG_ASF_STREAM_MUXER
902 AVOutputFormat ff_asf_stream_muxer = {
903  .name = "asf_stream",
904  .long_name = NULL_IF_CONFIG_SMALL("ASF format"),
905  .mime_type = "video/x-ms-asf",
906  .extensions = "asf,wmv,wma",
907  .priv_data_size = sizeof(ASFContext),
909  .audio_codec = CODEC_ID_MP3,
910 #else
911  .audio_codec = CODEC_ID_MP2,
912 #endif
913  .video_codec = CODEC_ID_MSMPEG4V3,
918  .codec_tag= (const AVCodecTag* const []){codec_asf_bmp_tags, ff_codec_bmp_tags, ff_codec_wav_tags, 0},
919 };
920 #endif //CONFIG_ASF_STREAM_MUXER