Libav
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 
22 #include "libavutil/dict.h"
23 #include "libavutil/mathematics.h"
24 #include "avformat.h"
25 #include "avio_internal.h"
26 #include "internal.h"
27 #include "riff.h"
28 #include "asf.h"
29 
30 #undef NDEBUG
31 #include <assert.h>
32 
33 
34 #define ASF_INDEXED_INTERVAL 10000000
35 #define ASF_INDEX_BLOCK 600
36 
37 #define ASF_PACKET_ERROR_CORRECTION_DATA_SIZE 0x2
38 #define ASF_PACKET_ERROR_CORRECTION_FLAGS \
39  (ASF_PACKET_FLAG_ERROR_CORRECTION_PRESENT | \
40  ASF_PACKET_ERROR_CORRECTION_DATA_SIZE)
41 
42 #if (ASF_PACKET_ERROR_CORRECTION_FLAGS != 0)
43 # define ASF_PACKET_ERROR_CORRECTION_FLAGS_FIELD_SIZE 1
44 #else
45 # define ASF_PACKET_ERROR_CORRECTION_FLAGS_FIELD_SIZE 0
46 #endif
47 
48 #define ASF_PPI_PROPERTY_FLAGS \
49  (ASF_PL_FLAG_REPLICATED_DATA_LENGTH_FIELD_IS_BYTE | \
50  ASF_PL_FLAG_OFFSET_INTO_MEDIA_OBJECT_LENGTH_FIELD_IS_DWORD | \
51  ASF_PL_FLAG_MEDIA_OBJECT_NUMBER_LENGTH_FIELD_IS_BYTE | \
52  ASF_PL_FLAG_STREAM_NUMBER_LENGTH_FIELD_IS_BYTE)
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 #if (ASF_PPI_FLAG_PACKET_LENGTH_FIELD_IS_BYTE == (ASF_PPI_LENGTH_TYPE_FLAGS & ASF_PPI_MASK_PACKET_LENGTH_FIELD_SIZE))
72 # define ASF_PPI_PACKET_LENGTH_FIELD_SIZE 1
73 #endif
74 #if (ASF_PPI_FLAG_PACKET_LENGTH_FIELD_IS_WORD == (ASF_PPI_LENGTH_TYPE_FLAGS & ASF_PPI_MASK_PACKET_LENGTH_FIELD_SIZE))
75 # define ASF_PPI_PACKET_LENGTH_FIELD_SIZE 2
76 #endif
77 #if (ASF_PPI_FLAG_PACKET_LENGTH_FIELD_IS_DWORD == (ASF_PPI_LENGTH_TYPE_FLAGS & ASF_PPI_MASK_PACKET_LENGTH_FIELD_SIZE))
78 # define ASF_PPI_PACKET_LENGTH_FIELD_SIZE 4
79 #endif
80 #ifndef ASF_PPI_PACKET_LENGTH_FIELD_SIZE
81 # define ASF_PPI_PACKET_LENGTH_FIELD_SIZE 0
82 #endif
83 
84 #if (ASF_PPI_FLAG_PADDING_LENGTH_FIELD_IS_BYTE == (ASF_PPI_LENGTH_TYPE_FLAGS & ASF_PPI_MASK_PADDING_LENGTH_FIELD_SIZE))
85 # define ASF_PPI_PADDING_LENGTH_FIELD_SIZE 1
86 #endif
87 #if (ASF_PPI_FLAG_PADDING_LENGTH_FIELD_IS_WORD == (ASF_PPI_LENGTH_TYPE_FLAGS & ASF_PPI_MASK_PADDING_LENGTH_FIELD_SIZE))
88 # define ASF_PPI_PADDING_LENGTH_FIELD_SIZE 2
89 #endif
90 #if (ASF_PPI_FLAG_PADDING_LENGTH_FIELD_IS_DWORD == (ASF_PPI_LENGTH_TYPE_FLAGS & ASF_PPI_MASK_PADDING_LENGTH_FIELD_SIZE))
91 # define ASF_PPI_PADDING_LENGTH_FIELD_SIZE 4
92 #endif
93 #ifndef ASF_PPI_PADDING_LENGTH_FIELD_SIZE
94 # define ASF_PPI_PADDING_LENGTH_FIELD_SIZE 0
95 #endif
96 
97 #if (ASF_PL_FLAG_REPLICATED_DATA_LENGTH_FIELD_IS_BYTE == (ASF_PPI_PROPERTY_FLAGS & ASF_PL_MASK_REPLICATED_DATA_LENGTH_FIELD_SIZE))
98 # define ASF_PAYLOAD_REPLICATED_DATA_LENGTH_FIELD_SIZE 1
99 #endif
100 #if (ASF_PL_FLAG_REPLICATED_DATA_LENGTH_FIELD_IS_WORD == (ASF_PPI_PROPERTY_FLAGS & ASF_PL_MASK_REPLICATED_DATA_LENGTH_FIELD_SIZE))
101 # define ASF_PAYLOAD_REPLICATED_DATA_LENGTH_FIELD_SIZE 2
102 #endif
103 #if (ASF_PL_FLAG_REPLICATED_DATA_LENGTH_FIELD_IS_DWORD == (ASF_PPI_PROPERTY_FLAGS & ASF_PL_MASK_REPLICATED_DATA_LENGTH_FIELD_SIZE))
104 # define ASF_PAYLOAD_REPLICATED_DATA_LENGTH_FIELD_SIZE 4
105 #endif
106 #ifndef ASF_PAYLOAD_REPLICATED_DATA_LENGTH_FIELD_SIZE
107 # define ASF_PAYLOAD_REPLICATED_DATA_LENGTH_FIELD_SIZE 0
108 #endif
109 
110 #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))
111 # define ASF_PAYLOAD_OFFSET_INTO_MEDIA_OBJECT_FIELD_SIZE 1
112 #endif
113 #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))
114 # define ASF_PAYLOAD_OFFSET_INTO_MEDIA_OBJECT_FIELD_SIZE 2
115 #endif
116 #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))
117 # define ASF_PAYLOAD_OFFSET_INTO_MEDIA_OBJECT_FIELD_SIZE 4
118 #endif
119 #ifndef ASF_PAYLOAD_OFFSET_INTO_MEDIA_OBJECT_FIELD_SIZE
120 # define ASF_PAYLOAD_OFFSET_INTO_MEDIA_OBJECT_FIELD_SIZE 0
121 #endif
122 
123 #if (ASF_PL_FLAG_MEDIA_OBJECT_NUMBER_LENGTH_FIELD_IS_BYTE == (ASF_PPI_PROPERTY_FLAGS & ASF_PL_MASK_MEDIA_OBJECT_NUMBER_LENGTH_FIELD_SIZE))
124 # define ASF_PAYLOAD_MEDIA_OBJECT_NUMBER_FIELD_SIZE 1
125 #endif
126 #if (ASF_PL_FLAG_MEDIA_OBJECT_NUMBER_LENGTH_FIELD_IS_WORD == (ASF_PPI_PROPERTY_FLAGS & ASF_PL_MASK_MEDIA_OBJECT_NUMBER_LENGTH_FIELD_SIZE))
127 # define ASF_PAYLOAD_MEDIA_OBJECT_NUMBER_FIELD_SIZE 2
128 #endif
129 #if (ASF_PL_FLAG_MEDIA_OBJECT_NUMBER_LENGTH_FIELD_IS_DWORD == (ASF_PPI_PROPERTY_FLAGS & ASF_PL_MASK_MEDIA_OBJECT_NUMBER_LENGTH_FIELD_SIZE))
130 # define ASF_PAYLOAD_MEDIA_OBJECT_NUMBER_FIELD_SIZE 4
131 #endif
132 #ifndef ASF_PAYLOAD_MEDIA_OBJECT_NUMBER_FIELD_SIZE
133 # define ASF_PAYLOAD_MEDIA_OBJECT_NUMBER_FIELD_SIZE 0
134 #endif
135 
136 #if (ASF_PL_FLAG_PAYLOAD_LENGTH_FIELD_IS_BYTE == (ASF_PAYLOAD_FLAGS & ASF_PL_MASK_PAYLOAD_LENGTH_FIELD_SIZE))
137 # define ASF_PAYLOAD_LENGTH_FIELD_SIZE 1
138 #endif
139 #if (ASF_PL_FLAG_PAYLOAD_LENGTH_FIELD_IS_WORD == (ASF_PAYLOAD_FLAGS & ASF_PL_MASK_PAYLOAD_LENGTH_FIELD_SIZE))
140 # define ASF_PAYLOAD_LENGTH_FIELD_SIZE 2
141 #endif
142 #ifndef ASF_PAYLOAD_LENGTH_FIELD_SIZE
143 # define ASF_PAYLOAD_LENGTH_FIELD_SIZE 0
144 #endif
145 
146 #define PACKET_HEADER_MIN_SIZE \
147  (ASF_PACKET_ERROR_CORRECTION_FLAGS_FIELD_SIZE + \
148  ASF_PACKET_ERROR_CORRECTION_DATA_SIZE + \
149  1 + /* Length Type Flags */ \
150  1 + /* Property Flags */ \
151  ASF_PPI_PACKET_LENGTH_FIELD_SIZE + \
152  ASF_PPI_SEQUENCE_FIELD_SIZE + \
153  ASF_PPI_PADDING_LENGTH_FIELD_SIZE + \
154  4 + /* Send Time Field */ \
155  2) /* Duration Field */
156 
157 // Replicated Data shall be at least 8 bytes long.
158 #define ASF_PAYLOAD_REPLICATED_DATA_LENGTH 0x08
159 
160 #define PAYLOAD_HEADER_SIZE_SINGLE_PAYLOAD \
161  (1 + /* Stream Number */ \
162  ASF_PAYLOAD_MEDIA_OBJECT_NUMBER_FIELD_SIZE + \
163  ASF_PAYLOAD_OFFSET_INTO_MEDIA_OBJECT_FIELD_SIZE + \
164  ASF_PAYLOAD_REPLICATED_DATA_LENGTH_FIELD_SIZE + \
165  ASF_PAYLOAD_REPLICATED_DATA_LENGTH)
166 
167 #define PAYLOAD_HEADER_SIZE_MULTIPLE_PAYLOADS \
168  (1 + /* Stream Number */ \
169  ASF_PAYLOAD_MEDIA_OBJECT_NUMBER_FIELD_SIZE + \
170  ASF_PAYLOAD_OFFSET_INTO_MEDIA_OBJECT_FIELD_SIZE + \
171  ASF_PAYLOAD_REPLICATED_DATA_LENGTH_FIELD_SIZE + \
172  ASF_PAYLOAD_REPLICATED_DATA_LENGTH + \
173  ASF_PAYLOAD_LENGTH_FIELD_SIZE)
174 
175 #define SINGLE_PAYLOAD_DATA_LENGTH \
176  (PACKET_SIZE - \
177  PACKET_HEADER_MIN_SIZE - \
178  PAYLOAD_HEADER_SIZE_SINGLE_PAYLOAD)
179 
180 #define MULTI_PAYLOAD_CONSTANT \
181  (PACKET_SIZE - \
182  PACKET_HEADER_MIN_SIZE - \
183  1 - /* Payload Flags */ \
184  2 * PAYLOAD_HEADER_SIZE_MULTIPLE_PAYLOADS)
185 
186 #define DATA_HEADER_SIZE 50
187 
188 typedef struct {
189  uint32_t seqno;
191  ASFStream streams[128];
192  /* non streamed additonnal info */
193  uint64_t nb_packets;
194  int64_t duration;
195  /* packet filling */
196  unsigned char multi_payloads_present;
197  int packet_size_left;
200  unsigned int packet_nb_payloads;
201  uint8_t packet_buf[PACKET_SIZE];
203  /* only for reading */
204  uint64_t data_offset;
205 
208  uint32_t nb_index_count;
210  uint16_t maximum_packet;
211 } ASFContext;
212 
213 static const AVCodecTag codec_asf_bmp_tags[] = {
214  { AV_CODEC_ID_MPEG4, MKTAG('M', 'P', '4', 'S') },
215  { AV_CODEC_ID_MPEG4, MKTAG('M', '4', 'S', '2') },
216  { AV_CODEC_ID_MSMPEG4V3, MKTAG('M', 'P', '4', '3') },
217  { AV_CODEC_ID_NONE, 0 },
218 };
219 
220 #define PREROLL_TIME 3100
221 
222 static void put_guid(AVIOContext *s, const ff_asf_guid *g)
223 {
224  assert(sizeof(*g) == 16);
225  avio_write(s, *g, sizeof(*g));
226 }
227 
228 static void put_str16(AVIOContext *s, const char *tag)
229 {
230  int len;
231  uint8_t *pb;
232  AVIOContext *dyn_buf;
233  if (avio_open_dyn_buf(&dyn_buf) < 0)
234  return;
235 
236  avio_put_str16le(dyn_buf, tag);
237  len = avio_close_dyn_buf(dyn_buf, &pb);
238  avio_wl16(s, len);
239  avio_write(s, pb, len);
240  av_freep(&pb);
241 }
242 
243 static int64_t put_header(AVIOContext *pb, const ff_asf_guid *g)
244 {
245  int64_t pos;
246 
247  pos = avio_tell(pb);
248  put_guid(pb, g);
249  avio_wl64(pb, 24);
250  return pos;
251 }
252 
253 /* update header size */
254 static void end_header(AVIOContext *pb, int64_t pos)
255 {
256  int64_t pos1;
257 
258  pos1 = avio_tell(pb);
259  avio_seek(pb, pos + 16, SEEK_SET);
260  avio_wl64(pb, pos1 - pos);
261  avio_seek(pb, pos1, SEEK_SET);
262 }
263 
264 /* write an asf chunk (only used in streaming case) */
265 static void put_chunk(AVFormatContext *s, int type,
266  int payload_length, int flags)
267 {
268  ASFContext *asf = s->priv_data;
269  AVIOContext *pb = s->pb;
270  int length;
271 
272  length = payload_length + 8;
273  avio_wl16(pb, type);
274  avio_wl16(pb, length); // size
275  avio_wl32(pb, asf->seqno); // sequence number
276  avio_wl16(pb, flags); // unknown bytes
277  avio_wl16(pb, length); // size_confirm
278  asf->seqno++;
279 }
280 
281 /* convert from unix to windows time */
282 static int64_t unix_to_file_time(int ti)
283 {
284  int64_t t;
285 
286  t = ti * INT64_C(10000000);
287  t += INT64_C(116444736000000000);
288  return t;
289 }
290 
291 static int32_t get_send_time(ASFContext *asf, int64_t pres_time, uint64_t *offset)
292 {
293  int i;
294  int32_t send_time = 0;
295  *offset = asf->data_offset + DATA_HEADER_SIZE;
296  for (i = 0; i < asf->nb_index_count; i++) {
297  if (pres_time <= asf->index_ptr[i].send_time)
298  break;
299  send_time = asf->index_ptr[i].send_time;
300  *offset = asf->index_ptr[i].offset;
301  }
302 
303  return send_time / 10000;
304 }
305 
307 {
308  ASFContext *asf = s->priv_data;
309  AVIOContext *pb = s->pb;
310  int i;
311  AVRational scale = {1, 10000000};
312  int64_t hpos = put_header(pb, &ff_asf_marker_header);
313 
314  put_guid(pb, &ff_asf_reserved_4); // ASF spec mandates this reserved value
315  avio_wl32(pb, s->nb_chapters); // markers count
316  avio_wl16(pb, 0); // ASF spec mandates 0 for this
317  avio_wl16(pb, 0); // name length 0, no name given
318 
319  for (i = 0; i < s->nb_chapters; i++) {
320  AVChapter *c = s->chapters[i];
321  AVDictionaryEntry *t = av_dict_get(c->metadata, "title", NULL, 0);
322  int64_t pres_time = av_rescale_q(c->start, c->time_base, scale);
323  uint64_t offset;
324  int32_t send_time = get_send_time(asf, pres_time, &offset);
325  int len = 0;
326  uint8_t *buf;
327  AVIOContext *dyn_buf;
328  if (t) {
329  if (avio_open_dyn_buf(&dyn_buf) < 0)
330  return AVERROR(ENOMEM);
331  avio_put_str16le(dyn_buf, t->value);
332  len = avio_close_dyn_buf(dyn_buf, &buf);
333  }
334  avio_wl64(pb, offset); // offset of the packet with send_time
335  avio_wl64(pb, pres_time + PREROLL_TIME * 10000); // presentation time
336  avio_wl16(pb, 12 + len); // entry length
337  avio_wl32(pb, send_time); // send time
338  avio_wl32(pb, 0); // flags, should be 0
339  avio_wl32(pb, len / 2); // marker desc length in WCHARS!
340  if (t) {
341  avio_write(pb, buf, len); // marker desc
342  av_freep(&buf);
343  }
344  }
345  end_header(pb, hpos);
346  return 0;
347 }
348 
349 /* write the header (used two times if non streamed) */
350 static int asf_write_header1(AVFormatContext *s, int64_t file_size,
351  int64_t data_chunk_size)
352 {
353  ASFContext *asf = s->priv_data;
354  AVIOContext *pb = s->pb;
355  AVDictionaryEntry *tags[5];
356  int header_size, n, extra_size, extra_size2, wav_extra_size, file_time;
357  int has_title;
358  int metadata_count;
359  AVCodecContext *enc;
360  int64_t header_offset, cur_pos, hpos;
361  int bit_rate;
362  int64_t duration;
363 
365 
366  tags[0] = av_dict_get(s->metadata, "title", NULL, 0);
367  tags[1] = av_dict_get(s->metadata, "author", NULL, 0);
368  tags[2] = av_dict_get(s->metadata, "copyright", NULL, 0);
369  tags[3] = av_dict_get(s->metadata, "comment", NULL, 0);
370  tags[4] = av_dict_get(s->metadata, "rating", NULL, 0);
371 
372  duration = asf->duration + PREROLL_TIME * 10000;
373  has_title = tags[0] || tags[1] || tags[2] || tags[3] || tags[4];
374  metadata_count = av_dict_count(s->metadata);
375 
376  bit_rate = 0;
377  for (n = 0; n < s->nb_streams; n++) {
378  enc = s->streams[n]->codec;
379 
380  avpriv_set_pts_info(s->streams[n], 32, 1, 1000); /* 32 bit pts in ms */
381 
382  bit_rate += enc->bit_rate;
383  }
384 
385  if (asf->is_streamed) {
386  put_chunk(s, 0x4824, 0, 0xc00); /* start of stream (length will be patched later) */
387  }
388 
389  put_guid(pb, &ff_asf_header);
390  avio_wl64(pb, -1); /* header length, will be patched after */
391  avio_wl32(pb, 3 + has_title + !!metadata_count + s->nb_streams); /* number of chunks in header */
392  avio_w8(pb, 1); /* ??? */
393  avio_w8(pb, 2); /* ??? */
394 
395  /* file header */
396  header_offset = avio_tell(pb);
397  hpos = put_header(pb, &ff_asf_file_header);
398  put_guid(pb, &ff_asf_my_guid);
399  avio_wl64(pb, file_size);
400  file_time = 0;
401  avio_wl64(pb, unix_to_file_time(file_time));
402  avio_wl64(pb, asf->nb_packets); /* number of packets */
403  avio_wl64(pb, duration); /* end time stamp (in 100ns units) */
404  avio_wl64(pb, asf->duration); /* duration (in 100ns units) */
405  avio_wl64(pb, PREROLL_TIME); /* start time stamp */
406  avio_wl32(pb, (asf->is_streamed || !pb->seekable) ? 3 : 2); /* ??? */
407  avio_wl32(pb, s->packet_size); /* packet size */
408  avio_wl32(pb, s->packet_size); /* packet size */
409  avio_wl32(pb, bit_rate); /* Nominal data rate in bps */
410  end_header(pb, hpos);
411 
412  /* unknown headers */
413  hpos = put_header(pb, &ff_asf_head1_guid);
415  avio_wl32(pb, 6);
416  avio_wl16(pb, 0);
417  end_header(pb, hpos);
418 
419  /* title and other infos */
420  if (has_title) {
421  int len;
422  uint8_t *buf;
423  AVIOContext *dyn_buf;
424 
425  if (avio_open_dyn_buf(&dyn_buf) < 0)
426  return AVERROR(ENOMEM);
427 
428  hpos = put_header(pb, &ff_asf_comment_header);
429 
430  for (n = 0; n < FF_ARRAY_ELEMS(tags); n++) {
431  len = tags[n] ? avio_put_str16le(dyn_buf, tags[n]->value) : 0;
432  avio_wl16(pb, len);
433  }
434  len = avio_close_dyn_buf(dyn_buf, &buf);
435  avio_write(pb, buf, len);
436  av_freep(&buf);
437  end_header(pb, hpos);
438  }
439  if (metadata_count) {
442  avio_wl16(pb, metadata_count);
443  while ((tag = av_dict_get(s->metadata, "", tag, AV_DICT_IGNORE_SUFFIX))) {
444  put_str16(pb, tag->key);
445  avio_wl16(pb, 0);
446  put_str16(pb, tag->value);
447  }
448  end_header(pb, hpos);
449  }
450  /* chapters using ASF markers */
451  if (!asf->is_streamed && s->nb_chapters) {
452  int ret;
453  if (ret = asf_write_markers(s))
454  return ret;
455  }
456  /* stream headers */
457  for (n = 0; n < s->nb_streams; n++) {
458  int64_t es_pos;
459  // ASFStream *stream = &asf->streams[n];
460 
461  enc = s->streams[n]->codec;
462  asf->streams[n].num = n + 1;
463  asf->streams[n].seq = 0;
464 
465  switch (enc->codec_type) {
466  case AVMEDIA_TYPE_AUDIO:
467  wav_extra_size = 0;
468  extra_size = 18 + wav_extra_size;
469  extra_size2 = 8;
470  break;
471  default:
472  case AVMEDIA_TYPE_VIDEO:
473  wav_extra_size = enc->extradata_size;
474  extra_size = 0x33 + wav_extra_size;
475  extra_size2 = 0;
476  break;
477  }
478 
479  hpos = put_header(pb, &ff_asf_stream_header);
480  if (enc->codec_type == AVMEDIA_TYPE_AUDIO) {
483  } else {
486  }
487  avio_wl64(pb, 0); /* ??? */
488  es_pos = avio_tell(pb);
489  avio_wl32(pb, extra_size); /* wav header len */
490  avio_wl32(pb, extra_size2); /* additional data len */
491  avio_wl16(pb, n + 1); /* stream number */
492  avio_wl32(pb, 0); /* ??? */
493 
494  if (enc->codec_type == AVMEDIA_TYPE_AUDIO) {
495  /* WAVEFORMATEX header */
496  int wavsize = ff_put_wav_header(pb, enc);
497 
498  if (wavsize < 0)
499  return -1;
500  if (wavsize != extra_size) {
501  cur_pos = avio_tell(pb);
502  avio_seek(pb, es_pos, SEEK_SET);
503  avio_wl32(pb, wavsize); /* wav header len */
504  avio_seek(pb, cur_pos, SEEK_SET);
505  }
506  /* ERROR Correction */
507  avio_w8(pb, 0x01);
508  if (enc->codec_id == AV_CODEC_ID_ADPCM_G726 || !enc->block_align) {
509  avio_wl16(pb, 0x0190);
510  avio_wl16(pb, 0x0190);
511  } else {
512  avio_wl16(pb, enc->block_align);
513  avio_wl16(pb, enc->block_align);
514  }
515  avio_wl16(pb, 0x01);
516  avio_w8(pb, 0x00);
517  } else {
518  avio_wl32(pb, enc->width);
519  avio_wl32(pb, enc->height);
520  avio_w8(pb, 2); /* ??? */
521  avio_wl16(pb, 40 + enc->extradata_size); /* size */
522 
523  /* BITMAPINFOHEADER header */
525  }
526  end_header(pb, hpos);
527  }
528 
529  /* media comments */
530 
533  avio_wl32(pb, s->nb_streams);
534  for (n = 0; n < s->nb_streams; n++) {
535  AVCodec *p;
536  const char *desc;
537  int len;
538  uint8_t *buf;
539  AVIOContext *dyn_buf;
540 
541  enc = s->streams[n]->codec;
542  p = avcodec_find_encoder(enc->codec_id);
543 
544  if (enc->codec_type == AVMEDIA_TYPE_AUDIO)
545  avio_wl16(pb, 2);
546  else if (enc->codec_type == AVMEDIA_TYPE_VIDEO)
547  avio_wl16(pb, 1);
548  else
549  avio_wl16(pb, -1);
550 
551  if (enc->codec_id == AV_CODEC_ID_WMAV2)
552  desc = "Windows Media Audio V8";
553  else
554  desc = p ? p->name : enc->codec_name;
555 
556  if (avio_open_dyn_buf(&dyn_buf) < 0)
557  return AVERROR(ENOMEM);
558 
559  avio_put_str16le(dyn_buf, desc);
560  len = avio_close_dyn_buf(dyn_buf, &buf);
561  avio_wl16(pb, len / 2); // "number of characters" = length in bytes / 2
562 
563  avio_write(pb, buf, len);
564  av_freep(&buf);
565 
566  avio_wl16(pb, 0); /* no parameters */
567 
568  /* id */
569  if (enc->codec_type == AVMEDIA_TYPE_AUDIO) {
570  avio_wl16(pb, 2);
571  avio_wl16(pb, enc->codec_tag);
572  } else {
573  avio_wl16(pb, 4);
574  avio_wl32(pb, enc->codec_tag);
575  }
576  if (!enc->codec_tag)
577  return -1;
578  }
579  end_header(pb, hpos);
580 
581  /* patch the header size fields */
582 
583  cur_pos = avio_tell(pb);
584  header_size = cur_pos - header_offset;
585  if (asf->is_streamed) {
586  header_size += 8 + 30 + DATA_HEADER_SIZE;
587 
588  avio_seek(pb, header_offset - 10 - 30, SEEK_SET);
589  avio_wl16(pb, header_size);
590  avio_seek(pb, header_offset - 2 - 30, SEEK_SET);
591  avio_wl16(pb, header_size);
592 
593  header_size -= 8 + 30 + DATA_HEADER_SIZE;
594  }
595  header_size += 24 + 6;
596  avio_seek(pb, header_offset - 14, SEEK_SET);
597  avio_wl64(pb, header_size);
598  avio_seek(pb, cur_pos, SEEK_SET);
599 
600  /* movie chunk, followed by packets of packet_size */
601  asf->data_offset = cur_pos;
603  avio_wl64(pb, data_chunk_size);
604  put_guid(pb, &ff_asf_my_guid);
605  avio_wl64(pb, asf->nb_packets); /* nb packets */
606  avio_w8(pb, 1); /* ??? */
607  avio_w8(pb, 1); /* ??? */
608  return 0;
609 }
610 
612 {
613  ASFContext *asf = s->priv_data;
614 
616  asf->nb_packets = 0;
617 
618  asf->last_indexed_pts = 0;
619  asf->index_ptr = av_malloc(sizeof(ASFIndex) * ASF_INDEX_BLOCK);
621  asf->nb_index_count = 0;
622  asf->maximum_packet = 0;
623 
624  /* the data-chunk-size has to be 50 (DATA_HEADER_SIZE), which is
625  * data_size - asf->data_offset at the moment this function is done.
626  * It is needed to use asf as a streamable format. */
627  if (asf_write_header1(s, 0, DATA_HEADER_SIZE) < 0) {
628  //av_free(asf);
629  return -1;
630  }
631 
632  avio_flush(s->pb);
633 
634  asf->packet_nb_payloads = 0;
635  asf->packet_timestamp_start = -1;
636  asf->packet_timestamp_end = -1;
637  ffio_init_context(&asf->pb, asf->packet_buf, s->packet_size, 1,
638  NULL, NULL, NULL, NULL);
639 
640  return 0;
641 }
642 
644 {
645  ASFContext *asf = s->priv_data;
646 
647  asf->is_streamed = 1;
648 
649  return asf_write_header(s);
650 }
651 
653  unsigned sendtime, unsigned duration,
654  int nb_payloads, int padsize)
655 {
656  ASFContext *asf = s->priv_data;
657  AVIOContext *pb = s->pb;
658  int ppi_size, i;
659  int64_t start = avio_tell(pb);
660 
661  int iLengthTypeFlags = ASF_PPI_LENGTH_TYPE_FLAGS;
662 
663  padsize -= PACKET_HEADER_MIN_SIZE;
664  if (asf->multi_payloads_present)
665  padsize--;
666  assert(padsize >= 0);
667 
669  for (i = 0; i < ASF_PACKET_ERROR_CORRECTION_DATA_SIZE; i++)
670  avio_w8(pb, 0x0);
671 
672  if (asf->multi_payloads_present)
673  iLengthTypeFlags |= ASF_PPI_FLAG_MULTIPLE_PAYLOADS_PRESENT;
674 
675  if (padsize > 0) {
676  if (padsize < 256)
677  iLengthTypeFlags |= ASF_PPI_FLAG_PADDING_LENGTH_FIELD_IS_BYTE;
678  else
679  iLengthTypeFlags |= ASF_PPI_FLAG_PADDING_LENGTH_FIELD_IS_WORD;
680  }
681  avio_w8(pb, iLengthTypeFlags);
682 
684 
685  if (iLengthTypeFlags & ASF_PPI_FLAG_PADDING_LENGTH_FIELD_IS_WORD)
686  avio_wl16(pb, padsize - 2);
687  if (iLengthTypeFlags & ASF_PPI_FLAG_PADDING_LENGTH_FIELD_IS_BYTE)
688  avio_w8(pb, padsize - 1);
689 
690  avio_wl32(pb, sendtime);
691  avio_wl16(pb, duration);
692  if (asf->multi_payloads_present)
693  avio_w8(pb, nb_payloads | ASF_PAYLOAD_FLAGS);
694 
695  ppi_size = avio_tell(pb) - start;
696 
697  return ppi_size;
698 }
699 
701 {
702  ASFContext *asf = s->priv_data;
703  int packet_hdr_size, packet_filled_size;
704 
705  assert(asf->packet_timestamp_end >= asf->packet_timestamp_start);
706 
707  if (asf->is_streamed)
708  put_chunk(s, 0x4424, s->packet_size, 0);
709 
710  packet_hdr_size = put_payload_parsing_info(s,
712  asf->packet_timestamp_end -
714  asf->packet_nb_payloads,
715  asf->packet_size_left);
716 
717  packet_filled_size = PACKET_SIZE - asf->packet_size_left;
718  assert(packet_hdr_size <= asf->packet_size_left);
719  memset(asf->packet_buf + packet_filled_size, 0, asf->packet_size_left);
720 
721  avio_write(s->pb, asf->packet_buf, s->packet_size - packet_hdr_size);
722 
723  avio_flush(s->pb);
724  asf->nb_packets++;
725  asf->packet_nb_payloads = 0;
726  asf->packet_timestamp_start = -1;
727  asf->packet_timestamp_end = -1;
728  ffio_init_context(&asf->pb, asf->packet_buf, s->packet_size, 1,
729  NULL, NULL, NULL, NULL);
730 }
731 
733  int presentation_time, int m_obj_size,
734  int m_obj_offset, int payload_len, int flags)
735 {
736  ASFContext *asf = s->priv_data;
737  AVIOContext *pb = &asf->pb;
738  int val;
739 
740  val = stream->num;
741  if (flags & AV_PKT_FLAG_KEY)
742  val |= ASF_PL_FLAG_KEY_FRAME;
743  avio_w8(pb, val);
744 
745  avio_w8(pb, stream->seq); // Media object number
746  avio_wl32(pb, m_obj_offset); // Offset Into Media Object
747 
748  // Replicated Data shall be at least 8 bytes long.
749  // The first 4 bytes of data shall contain the
750  // Size of the Media Object that the payload belongs to.
751  // The next 4 bytes of data shall contain the
752  // Presentation Time for the media object that the payload belongs to.
754 
755  avio_wl32(pb, m_obj_size); // Replicated Data - Media Object Size
756  avio_wl32(pb, presentation_time); // Replicated Data - Presentation Time
757 
758  if (asf->multi_payloads_present) {
759  avio_wl16(pb, payload_len); // payload length
760  }
761 }
762 
763 static void put_frame(AVFormatContext *s, ASFStream *stream, AVStream *avst,
764  int timestamp, const uint8_t *buf,
765  int m_obj_size, int flags)
766 {
767  ASFContext *asf = s->priv_data;
768  int m_obj_offset, payload_len, frag_len1;
769 
770  m_obj_offset = 0;
771  while (m_obj_offset < m_obj_size) {
772  payload_len = m_obj_size - m_obj_offset;
773  if (asf->packet_timestamp_start == -1) {
774  asf->multi_payloads_present = (payload_len < MULTI_PAYLOAD_CONSTANT);
775 
777  if (asf->multi_payloads_present) {
778  frag_len1 = MULTI_PAYLOAD_CONSTANT - 1;
779  } else {
780  frag_len1 = SINGLE_PAYLOAD_DATA_LENGTH;
781  }
782  asf->packet_timestamp_start = timestamp;
783  } else {
784  // multi payloads
785  frag_len1 = asf->packet_size_left -
788 
789  if (frag_len1 < payload_len &&
790  avst->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
791  flush_packet(s);
792  continue;
793  }
794  }
795  if (frag_len1 > 0) {
796  if (payload_len > frag_len1)
797  payload_len = frag_len1;
798  else if (payload_len == (frag_len1 - 1))
799  payload_len = frag_len1 - 2; // additional byte need to put padding length
800 
801  put_payload_header(s, stream, timestamp + PREROLL_TIME,
802  m_obj_size, m_obj_offset, payload_len, flags);
803  avio_write(&asf->pb, buf, payload_len);
804 
805  if (asf->multi_payloads_present)
807  else
809  asf->packet_timestamp_end = timestamp;
810 
811  asf->packet_nb_payloads++;
812  } else {
813  payload_len = 0;
814  }
815  m_obj_offset += payload_len;
816  buf += payload_len;
817 
818  if (!asf->multi_payloads_present)
819  flush_packet(s);
821  flush_packet(s);
822  }
823  stream->seq++;
824 }
825 
827 {
828  ASFContext *asf = s->priv_data;
829  AVIOContext *pb = s->pb;
830  ASFStream *stream;
831  int64_t duration;
832  AVCodecContext *codec;
833  int64_t packet_st, pts;
834  int start_sec, i;
835  int flags = pkt->flags;
836  uint64_t offset = avio_tell(pb);
837 
838  codec = s->streams[pkt->stream_index]->codec;
839  stream = &asf->streams[pkt->stream_index];
840 
841  if (codec->codec_type == AVMEDIA_TYPE_AUDIO)
842  flags &= ~AV_PKT_FLAG_KEY;
843 
844  pts = (pkt->pts != AV_NOPTS_VALUE) ? pkt->pts : pkt->dts;
845  assert(pts != AV_NOPTS_VALUE);
846  duration = pts * 10000;
847  asf->duration = FFMAX(asf->duration, duration + pkt->duration * 10000);
848 
849  packet_st = asf->nb_packets;
850  put_frame(s, stream, s->streams[pkt->stream_index],
851  pkt->dts, pkt->data, pkt->size, flags);
852 
853  /* check index */
854  if ((!asf->is_streamed) && (flags & AV_PKT_FLAG_KEY)) {
855  start_sec = (int)(duration / INT64_C(10000000));
856  if (start_sec != (int)(asf->last_indexed_pts / INT64_C(10000000))) {
857  for (i = asf->nb_index_count; i < start_sec; i++) {
858  if (i >= asf->nb_index_memory_alloc) {
859  int err;
861  if ((err = av_reallocp_array(&asf->index_ptr,
863  sizeof(*asf->index_ptr))) < 0) {
864  asf->nb_index_memory_alloc = 0;
865  return err;
866  }
867  }
868  // store
869  asf->index_ptr[i].packet_number = (uint32_t)packet_st;
870  asf->index_ptr[i].packet_count = (uint16_t)(asf->nb_packets - packet_st);
871  asf->index_ptr[i].send_time = start_sec * INT64_C(10000000);
872  asf->index_ptr[i].offset = offset;
873  asf->maximum_packet = FFMAX(asf->maximum_packet,
874  (uint16_t)(asf->nb_packets - packet_st));
875  }
876  asf->nb_index_count = start_sec;
877  asf->last_indexed_pts = duration;
878  }
879  }
880  return 0;
881 }
882 
884  uint16_t max, uint32_t count)
885 {
886  AVIOContext *pb = s->pb;
887  int i;
888 
890  avio_wl64(pb, 24 + 16 + 8 + 4 + 4 + (4 + 2) * count);
891  put_guid(pb, &ff_asf_my_guid);
893  avio_wl32(pb, max);
894  avio_wl32(pb, count);
895  for (i = 0; i < count; i++) {
896  avio_wl32(pb, index[i].packet_number);
897  avio_wl16(pb, index[i].packet_count);
898  }
899 
900  return 0;
901 }
902 
904 {
905  ASFContext *asf = s->priv_data;
906  int64_t file_size, data_size;
907 
908  /* flush the current packet */
909  if (asf->pb.buf_ptr > asf->pb.buffer)
910  flush_packet(s);
911 
912  /* write index */
913  data_size = avio_tell(s->pb);
914  if ((!asf->is_streamed) && (asf->nb_index_count != 0))
916  avio_flush(s->pb);
917 
918  if (asf->is_streamed || !s->pb->seekable) {
919  put_chunk(s, 0x4524, 0, 0); /* end of stream */
920  } else {
921  /* rewrite an updated header */
922  file_size = avio_tell(s->pb);
923  avio_seek(s->pb, 0, SEEK_SET);
924  asf_write_header1(s, file_size, data_size - asf->data_offset);
925  }
926 
927  av_free(asf->index_ptr);
928  return 0;
929 }
930 
931 #if CONFIG_ASF_MUXER
932 AVOutputFormat ff_asf_muxer = {
933  .name = "asf",
934  .long_name = NULL_IF_CONFIG_SMALL("ASF (Advanced / Active Streaming Format)"),
935  .mime_type = "video/x-ms-asf",
936  .extensions = "asf,wmv,wma",
937  .priv_data_size = sizeof(ASFContext),
939  .video_codec = AV_CODEC_ID_MSMPEG4V3,
944  .codec_tag = (const AVCodecTag * const []) {
946  },
947 };
948 #endif /* CONFIG_ASF_MUXER */
949 
950 #if CONFIG_ASF_STREAM_MUXER
951 AVOutputFormat ff_asf_stream_muxer = {
952  .name = "asf_stream",
953  .long_name = NULL_IF_CONFIG_SMALL("ASF (Advanced / Active Streaming Format)"),
954  .mime_type = "video/x-ms-asf",
955  .extensions = "asf,wmv,wma",
956  .priv_data_size = sizeof(ASFContext),
957  .audio_codec = CONFIG_LIBMP3LAME ? AV_CODEC_ID_MP3 : AV_CODEC_ID_MP2,
958  .video_codec = AV_CODEC_ID_MSMPEG4V3,
963  .codec_tag = (const AVCodecTag * const []) {
965  },
966 };
967 #endif /* CONFIG_ASF_STREAM_MUXER */