VirtualBox

source: vbox/trunk/src/libs/ffmpeg-20060710/libavformat/asf-enc.c@ 7784

Last change on this file since 7784 was 5776, checked in by vboxsync, 17 years ago

ffmpeg: exported to OSE
File size: 28.6 KB
Line 
1/*
2 * Adaptive stream format encoder
3 * Copyright (c) 2000, 2001 Fabrice Bellard.
4 *
5 * This library is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU Lesser General Public
7 * License as published by the Free Software Foundation; either
8 * version 2 of the License, or (at your option) any later version.
9 *
10 * This library is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * Lesser General Public License for more details.
14 *
15 * You should have received a copy of the GNU Lesser General Public
16 * License along with this library; if not, write to the Free Software
17 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
18 */
19#include "avformat.h"
20#include "avi.h"
21#include "asf.h"
22
23#undef NDEBUG
24#include <assert.h>
25
26#ifdef CONFIG_MUXERS
27
28
29#define ASF_INDEXED_INTERVAL 10000000
30#define ASF_INDEX_BLOCK 600
31
32#define ASF_PACKET_ERROR_CORRECTION_DATA_SIZE 0x2
33#define ASF_PACKET_ERROR_CORRECTION_FLAGS (\
34 ASF_PACKET_FLAG_ERROR_CORRECTION_PRESENT | \
35 ASF_PACKET_ERROR_CORRECTION_DATA_SIZE\
36 )
37
38#if (ASF_PACKET_ERROR_CORRECTION_FLAGS != 0)
39# define ASF_PACKET_ERROR_CORRECTION_FLAGS_FIELD_SIZE 1
40#else
41# define ASF_PACKET_ERROR_CORRECTION_FLAGS_FIELD_SIZE 0
42#endif
43
44#define ASF_PPI_PROPERTY_FLAGS (\
45 ASF_PL_FLAG_REPLICATED_DATA_LENGTH_FIELD_IS_BYTE | \
46 ASF_PL_FLAG_OFFSET_INTO_MEDIA_OBJECT_LENGTH_FIELD_IS_DWORD | \
47 ASF_PL_FLAG_MEDIA_OBJECT_NUMBER_LENGTH_FIELD_IS_BYTE | \
48 ASF_PL_FLAG_STREAM_NUMBER_LENGTH_FIELD_IS_BYTE \
49 )
50
51#define ASF_PPI_LENGTH_TYPE_FLAGS 0
52
53#define ASF_PAYLOAD_FLAGS ASF_PL_FLAG_PAYLOAD_LENGTH_FIELD_IS_WORD
54
55#if (ASF_PPI_FLAG_SEQUENCE_FIELD_IS_BYTE == (ASF_PPI_LENGTH_TYPE_FLAGS & ASF_PPI_MASK_SEQUENCE_FIELD_SIZE))
56# define ASF_PPI_SEQUENCE_FIELD_SIZE 1
57#endif
58#if (ASF_PPI_FLAG_SEQUENCE_FIELD_IS_WORD == (ASF_PPI_LENGTH_TYPE_FLAGS & ASF_PPI_MASK_SEQUENCE_FIELD_SIZE))
59# define ASF_PPI_SEQUENCE_FIELD_SIZE 2
60#endif
61#if (ASF_PPI_FLAG_SEQUENCE_FIELD_IS_DWORD == (ASF_PPI_LENGTH_TYPE_FLAGS & ASF_PPI_MASK_SEQUENCE_FIELD_SIZE))
62# define ASF_PPI_SEQUENCE_FIELD_SIZE 4
63#endif
64#ifndef ASF_PPI_SEQUENCE_FIELD_SIZE
65# define ASF_PPI_SEQUENCE_FIELD_SIZE 0
66#endif
67
68
69#if (ASF_PPI_FLAG_PACKET_LENGTH_FIELD_IS_BYTE == (ASF_PPI_LENGTH_TYPE_FLAGS & ASF_PPI_MASK_PACKET_LENGTH_FIELD_SIZE))
70# define ASF_PPI_PACKET_LENGTH_FIELD_SIZE 1
71#endif
72#if (ASF_PPI_FLAG_PACKET_LENGTH_FIELD_IS_WORD == (ASF_PPI_LENGTH_TYPE_FLAGS & ASF_PPI_MASK_PACKET_LENGTH_FIELD_SIZE))
73# define ASF_PPI_PACKET_LENGTH_FIELD_SIZE 2
74#endif
75#if (ASF_PPI_FLAG_PACKET_LENGTH_FIELD_IS_DWORD == (ASF_PPI_LENGTH_TYPE_FLAGS & ASF_PPI_MASK_PACKET_LENGTH_FIELD_SIZE))
76# define ASF_PPI_PACKET_LENGTH_FIELD_SIZE 4
77#endif
78#ifndef ASF_PPI_PACKET_LENGTH_FIELD_SIZE
79# define ASF_PPI_PACKET_LENGTH_FIELD_SIZE 0
80#endif
81
82#if (ASF_PPI_FLAG_PADDING_LENGTH_FIELD_IS_BYTE == (ASF_PPI_LENGTH_TYPE_FLAGS & ASF_PPI_MASK_PADDING_LENGTH_FIELD_SIZE))
83# define ASF_PPI_PADDING_LENGTH_FIELD_SIZE 1
84#endif
85#if (ASF_PPI_FLAG_PADDING_LENGTH_FIELD_IS_WORD == (ASF_PPI_LENGTH_TYPE_FLAGS & ASF_PPI_MASK_PADDING_LENGTH_FIELD_SIZE))
86# define ASF_PPI_PADDING_LENGTH_FIELD_SIZE 2
87#endif
88#if (ASF_PPI_FLAG_PADDING_LENGTH_FIELD_IS_DWORD == (ASF_PPI_LENGTH_TYPE_FLAGS & ASF_PPI_MASK_PADDING_LENGTH_FIELD_SIZE))
89# define ASF_PPI_PADDING_LENGTH_FIELD_SIZE 4
90#endif
91#ifndef ASF_PPI_PADDING_LENGTH_FIELD_SIZE
92# define ASF_PPI_PADDING_LENGTH_FIELD_SIZE 0
93#endif
94
95#if (ASF_PL_FLAG_REPLICATED_DATA_LENGTH_FIELD_IS_BYTE == (ASF_PPI_PROPERTY_FLAGS & ASF_PL_MASK_REPLICATED_DATA_LENGTH_FIELD_SIZE))
96# define ASF_PAYLOAD_REPLICATED_DATA_LENGTH_FIELD_SIZE 1
97#endif
98#if (ASF_PL_FLAG_REPLICATED_DATA_LENGTH_FIELD_IS_WORD == (ASF_PPI_PROPERTY_FLAGS & ASF_PL_MASK_REPLICATED_DATA_LENGTH_FIELD_SIZE))
99# define ASF_PAYLOAD_REPLICATED_DATA_LENGTH_FIELD_SIZE 2
100#endif
101#if (ASF_PL_FLAG_REPLICATED_DATA_LENGTH_FIELD_IS_DWORD == (ASF_PPI_PROPERTY_FLAGS & ASF_PL_MASK_REPLICATED_DATA_LENGTH_FIELD_SIZE))
102# define ASF_PAYLOAD_REPLICATED_DATA_LENGTH_FIELD_SIZE 4
103#endif
104#ifndef ASF_PAYLOAD_REPLICATED_DATA_LENGTH_FIELD_SIZE
105# define ASF_PAYLOAD_REPLICATED_DATA_LENGTH_FIELD_SIZE 0
106#endif
107
108#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))
109# define ASF_PAYLOAD_OFFSET_INTO_MEDIA_OBJECT_FIELD_SIZE 1
110#endif
111#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))
112# define ASF_PAYLOAD_OFFSET_INTO_MEDIA_OBJECT_FIELD_SIZE 2
113#endif
114#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))
115# define ASF_PAYLOAD_OFFSET_INTO_MEDIA_OBJECT_FIELD_SIZE 4
116#endif
117#ifndef ASF_PAYLOAD_OFFSET_INTO_MEDIA_OBJECT_FIELD_SIZE
118# define ASF_PAYLOAD_OFFSET_INTO_MEDIA_OBJECT_FIELD_SIZE 0
119#endif
120
121#if (ASF_PL_FLAG_MEDIA_OBJECT_NUMBER_LENGTH_FIELD_IS_BYTE == (ASF_PPI_PROPERTY_FLAGS & ASF_PL_MASK_MEDIA_OBJECT_NUMBER_LENGTH_FIELD_SIZE))
122# define ASF_PAYLOAD_MEDIA_OBJECT_NUMBER_FIELD_SIZE 1
123#endif
124#if (ASF_PL_FLAG_MEDIA_OBJECT_NUMBER_LENGTH_FIELD_IS_WORD == (ASF_PPI_PROPERTY_FLAGS & ASF_PL_MASK_MEDIA_OBJECT_NUMBER_LENGTH_FIELD_SIZE))
125# define ASF_PAYLOAD_MEDIA_OBJECT_NUMBER_FIELD_SIZE 2
126#endif
127#if (ASF_PL_FLAG_MEDIA_OBJECT_NUMBER_LENGTH_FIELD_IS_DWORD == (ASF_PPI_PROPERTY_FLAGS & ASF_PL_MASK_MEDIA_OBJECT_NUMBER_LENGTH_FIELD_SIZE))
128# define ASF_PAYLOAD_MEDIA_OBJECT_NUMBER_FIELD_SIZE 4
129#endif
130#ifndef ASF_PAYLOAD_MEDIA_OBJECT_NUMBER_FIELD_SIZE
131# define ASF_PAYLOAD_MEDIA_OBJECT_NUMBER_FIELD_SIZE 0
132#endif
133
134#if (ASF_PL_FLAG_PAYLOAD_LENGTH_FIELD_IS_BYTE == (ASF_PAYLOAD_FLAGS & ASF_PL_MASK_PAYLOAD_LENGTH_FIELD_SIZE))
135# define ASF_PAYLOAD_LENGTH_FIELD_SIZE 1
136#endif
137#if (ASF_PL_FLAG_PAYLOAD_LENGTH_FIELD_IS_WORD == (ASF_PAYLOAD_FLAGS & ASF_PL_MASK_PAYLOAD_LENGTH_FIELD_SIZE))
138# define ASF_PAYLOAD_LENGTH_FIELD_SIZE 2
139#endif
140#ifndef ASF_PAYLOAD_LENGTH_FIELD_SIZE
141# define ASF_PAYLOAD_LENGTH_FIELD_SIZE 0
142#endif
143
144#define PACKET_HEADER_MIN_SIZE (\
145 ASF_PACKET_ERROR_CORRECTION_FLAGS_FIELD_SIZE + \
146 ASF_PACKET_ERROR_CORRECTION_DATA_SIZE + \
147 1 + /*Length Type Flags*/ \
148 1 + /*Property Flags*/ \
149 ASF_PPI_PACKET_LENGTH_FIELD_SIZE + \
150 ASF_PPI_SEQUENCE_FIELD_SIZE + \
151 ASF_PPI_PADDING_LENGTH_FIELD_SIZE + \
152 4 + /*Send Time Field*/ \
153 2 /*Duration Field*/ \
154 )
155
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
168#define PAYLOAD_HEADER_SIZE_MULTIPLE_PAYLOADS (\
169 1 + /*Stream Number*/ \
170 ASF_PAYLOAD_MEDIA_OBJECT_NUMBER_FIELD_SIZE + \
171 ASF_PAYLOAD_OFFSET_INTO_MEDIA_OBJECT_FIELD_SIZE + \
172 ASF_PAYLOAD_REPLICATED_DATA_LENGTH_FIELD_SIZE + \
173 ASF_PAYLOAD_REPLICATED_DATA_LENGTH + \
174 ASF_PAYLOAD_LENGTH_FIELD_SIZE \
175 )
176
177#define SINGLE_PAYLOAD_DATA_LENGTH (\
178 PACKET_SIZE - \
179 PACKET_HEADER_MIN_SIZE - \
180 PAYLOAD_HEADER_SIZE_SINGLE_PAYLOAD \
181 )
182
183#define MULTI_PAYLOAD_CONSTANT (\
184 PACKET_SIZE - \
185 PACKET_HEADER_MIN_SIZE - \
186 1 - /*Payload Flags*/ \
187 2*PAYLOAD_HEADER_SIZE_MULTIPLE_PAYLOADS \
188 )
189
190static int preroll_time = 2000;
191
192static const uint8_t error_spread_ADPCM_G726[] = { 0x01, 0x90, 0x01, 0x90, 0x01, 0x01, 0x00, 0x00 };
193
194static void put_guid(ByteIOContext *s, const GUID *g)
195{
196 int i;
197
198 put_le32(s, g->v1);
199 put_le16(s, g->v2);
200 put_le16(s, g->v3);
201 for(i=0;i<8;i++)
202 put_byte(s, g->v4[i]);
203}
204
205static void put_str16(ByteIOContext *s, const char *tag)
206{
207 int c;
208
209 put_le16(s,strlen(tag) + 1);
210 for(;;) {
211 c = (uint8_t)*tag++;
212 put_le16(s, c);
213 if (c == '\0')
214 break;
215 }
216}
217
218static void put_str16_nolen(ByteIOContext *s, const char *tag)
219{
220 int c;
221
222 for(;;) {
223 c = (uint8_t)*tag++;
224 put_le16(s, c);
225 if (c == '\0')
226 break;
227 }
228}
229
230static int64_t put_header(ByteIOContext *pb, const GUID *g)
231{
232 int64_t pos;
233
234 pos = url_ftell(pb);
235 put_guid(pb, g);
236 put_le64(pb, 24);
237 return pos;
238}
239
240/* update header size */
241static void end_header(ByteIOContext *pb, int64_t pos)
242{
243 int64_t pos1;
244
245 pos1 = url_ftell(pb);
246 url_fseek(pb, pos + 16, SEEK_SET);
247 put_le64(pb, pos1 - pos);
248 url_fseek(pb, pos1, SEEK_SET);
249}
250
251/* write an asf chunk (only used in streaming case) */
252static void put_chunk(AVFormatContext *s, int type, int payload_length, int flags)
253{
254 ASFContext *asf = s->priv_data;
255 ByteIOContext *pb = &s->pb;
256 int length;
257
258 length = payload_length + 8;
259 put_le16(pb, type);
260 put_le16(pb, length); //size
261 put_le32(pb, asf->seqno);//sequence number
262 put_le16(pb, flags); /* unknown bytes */
263 put_le16(pb, length); //size_confirm
264 asf->seqno++;
265}
266
267/* convert from unix to windows time */
268static int64_t unix_to_file_time(int ti)
269{
270 int64_t t;
271
272 t = ti * int64_t_C(10000000);
273 t += int64_t_C(116444736000000000);
274 return t;
275}
276
277/* write the header (used two times if non streamed) */
278static int asf_write_header1(AVFormatContext *s, int64_t file_size, int64_t data_chunk_size)
279{
280 ASFContext *asf = s->priv_data;
281 ByteIOContext *pb = &s->pb;
282 int header_size, n, extra_size, extra_size2, wav_extra_size, file_time;
283 int has_title;
284 AVCodecContext *enc;
285 int64_t header_offset, cur_pos, hpos;
286 int bit_rate;
287
288 has_title = (s->title[0] || s->author[0] || s->copyright[0] || s->comment[0]);
289
290 bit_rate = 0;
291 for(n=0;n<s->nb_streams;n++) {
292 enc = s->streams[n]->codec;
293
294 av_set_pts_info(s->streams[n], 32, 1, 1000); /* 32 bit pts in ms */
295
296 bit_rate += enc->bit_rate;
297 }
298
299 if (asf->is_streamed) {
300 put_chunk(s, 0x4824, 0, 0xc00); /* start of stream (length will be patched later) */
301 }
302
303 put_guid(pb, &asf_header);
304 put_le64(pb, -1); /* header length, will be patched after */
305 put_le32(pb, 3 + has_title + s->nb_streams); /* number of chunks in header */
306 put_byte(pb, 1); /* ??? */
307 put_byte(pb, 2); /* ??? */
308
309 /* file header */
310 header_offset = url_ftell(pb);
311 hpos = put_header(pb, &file_header);
312 put_guid(pb, &my_guid);
313 put_le64(pb, file_size);
314 file_time = 0;
315 put_le64(pb, unix_to_file_time(file_time));
316 put_le64(pb, asf->nb_packets); /* number of packets */
317 put_le64(pb, asf->duration); /* end time stamp (in 100ns units) */
318 put_le64(pb, asf->duration); /* duration (in 100ns units) */
319 put_le32(pb, preroll_time); /* start time stamp */
320 put_le32(pb, 0); /* ??? */
321 put_le32(pb, asf->is_streamed ? 1 : 0); /* ??? */
322 put_le32(pb, asf->packet_size); /* packet size */
323 put_le32(pb, asf->packet_size); /* packet size */
324 put_le32(pb, bit_rate); /* Nominal data rate in bps */
325 end_header(pb, hpos);
326
327 /* unknown headers */
328 hpos = put_header(pb, &head1_guid);
329 put_guid(pb, &head2_guid);
330 put_le32(pb, 6);
331 put_le16(pb, 0);
332 end_header(pb, hpos);
333
334 /* title and other infos */
335 if (has_title) {
336 hpos = put_header(pb, &comment_header);
337 if ( s->title[0] ) { put_le16(pb, 2 * (strlen(s->title ) + 1)); } else { put_le16(pb, 0); }
338 if ( s->author[0] ) { put_le16(pb, 2 * (strlen(s->author ) + 1)); } else { put_le16(pb, 0); }
339 if ( s->copyright[0] ) { put_le16(pb, 2 * (strlen(s->copyright) + 1)); } else { put_le16(pb, 0); }
340 if ( s->comment[0] ) { put_le16(pb, 2 * (strlen(s->comment ) + 1)); } else { put_le16(pb, 0); }
341 put_le16(pb, 0);
342 if ( s->title[0] ) put_str16_nolen(pb, s->title);
343 if ( s->author[0] ) put_str16_nolen(pb, s->author);
344 if ( s->copyright[0] ) put_str16_nolen(pb, s->copyright);
345 if ( s->comment[0] ) put_str16_nolen(pb, s->comment);
346 end_header(pb, hpos);
347 }
348
349 /* stream headers */
350 for(n=0;n<s->nb_streams;n++) {
351 int64_t es_pos;
352 const uint8_t *er_spr = NULL;
353 int er_spr_len = 0;
354 // ASFStream *stream = &asf->streams[n];
355
356 enc = s->streams[n]->codec;
357 asf->streams[n].num = n + 1;
358 asf->streams[n].seq = 0;
359
360
361 if (enc->codec_type == CODEC_TYPE_AUDIO) {
362 if (enc->codec_id == CODEC_ID_ADPCM_G726) {
363 er_spr = error_spread_ADPCM_G726;
364 er_spr_len = sizeof(error_spread_ADPCM_G726);
365 }
366 }
367
368 switch(enc->codec_type) {
369 case CODEC_TYPE_AUDIO:
370 wav_extra_size = 0;
371 extra_size = 18 + wav_extra_size;
372 extra_size2 = er_spr_len;
373 break;
374 default:
375 case CODEC_TYPE_VIDEO:
376 wav_extra_size = enc->extradata_size;
377 extra_size = 0x33 + wav_extra_size;
378 extra_size2 = 0;
379 break;
380 }
381
382 hpos = put_header(pb, &stream_header);
383 if (enc->codec_type == CODEC_TYPE_AUDIO) {
384 put_guid(pb, &audio_stream);
385 if ((er_spr != NULL) && (er_spr_len != 0)) {
386 put_guid(pb, &audio_conceal_spread);
387 } else {
388 put_guid(pb, &video_conceal_none);
389 }
390 } else {
391 put_guid(pb, &video_stream);
392 put_guid(pb, &video_conceal_none);
393 }
394 put_le64(pb, 0); /* ??? */
395 es_pos = url_ftell(pb);
396 put_le32(pb, extra_size); /* wav header len */
397 put_le32(pb, extra_size2); /* additional data len */
398 put_le16(pb, n + 1); /* stream number */
399 put_le32(pb, 0); /* ??? */
400
401 if (enc->codec_type == CODEC_TYPE_AUDIO) {
402 /* WAVEFORMATEX header */
403 int wavsize = put_wav_header(pb, enc);
404 if ((enc->codec_id != CODEC_ID_MP3) && (enc->codec_id != CODEC_ID_MP2) && (enc->codec_id != CODEC_ID_ADPCM_IMA_WAV) && (enc->extradata_size==0)) {
405 wavsize += 2;
406 put_le16(pb, 0);
407 }
408
409 if (wavsize < 0)
410 return -1;
411 if (wavsize != extra_size) {
412 cur_pos = url_ftell(pb);
413 url_fseek(pb, es_pos, SEEK_SET);
414 put_le32(pb, wavsize); /* wav header len */
415 url_fseek(pb, cur_pos, SEEK_SET);
416 }
417 /* ERROR Correction */
418 if ((er_spr != NULL) && (er_spr_len != 0))
419 put_buffer(pb, er_spr, er_spr_len);
420 } else {
421 put_le32(pb, enc->width);
422 put_le32(pb, enc->height);
423 put_byte(pb, 2); /* ??? */
424 put_le16(pb, 40 + enc->extradata_size); /* size */
425
426 /* BITMAPINFOHEADER header */
427 put_bmp_header(pb, enc, codec_bmp_tags, 1);
428 }
429 end_header(pb, hpos);
430 }
431
432 /* media comments */
433
434 hpos = put_header(pb, &codec_comment_header);
435 put_guid(pb, &codec_comment1_header);
436 put_le32(pb, s->nb_streams);
437 for(n=0;n<s->nb_streams;n++) {
438 AVCodec *p;
439
440 enc = s->streams[n]->codec;
441 p = avcodec_find_encoder(enc->codec_id);
442
443 put_le16(pb, asf->streams[n].num);
444 put_str16(pb, p ? p->name : enc->codec_name);
445 put_le16(pb, 0); /* no parameters */
446
447
448 /* id */
449 if (enc->codec_type == CODEC_TYPE_AUDIO) {
450 put_le16(pb, 2);
451 if(!enc->codec_tag)
452 enc->codec_tag = codec_get_tag(codec_wav_tags, enc->codec_id);
453 if(!enc->codec_tag)
454 return -1;
455 put_le16(pb, enc->codec_tag);
456 } else {
457 put_le16(pb, 4);
458 if(!enc->codec_tag)
459 enc->codec_tag = codec_get_tag(codec_bmp_tags, enc->codec_id);
460 if(!enc->codec_tag)
461 return -1;
462 put_le32(pb, enc->codec_tag);
463 }
464 }
465 end_header(pb, hpos);
466
467 /* patch the header size fields */
468
469 cur_pos = url_ftell(pb);
470 header_size = cur_pos - header_offset;
471 if (asf->is_streamed) {
472 header_size += 8 + 30 + 50;
473
474 url_fseek(pb, header_offset - 10 - 30, SEEK_SET);
475 put_le16(pb, header_size);
476 url_fseek(pb, header_offset - 2 - 30, SEEK_SET);
477 put_le16(pb, header_size);
478
479 header_size -= 8 + 30 + 50;
480 }
481 header_size += 24 + 6;
482 url_fseek(pb, header_offset - 14, SEEK_SET);
483 put_le64(pb, header_size);
484 url_fseek(pb, cur_pos, SEEK_SET);
485
486 /* movie chunk, followed by packets of packet_size */
487 asf->data_offset = cur_pos;
488 put_guid(pb, &data_header);
489 put_le64(pb, data_chunk_size);
490 put_guid(pb, &my_guid);
491 put_le64(pb, asf->nb_packets); /* nb packets */
492 put_byte(pb, 1); /* ??? */
493 put_byte(pb, 1); /* ??? */
494 return 0;
495}
496
497static int asf_write_header(AVFormatContext *s)
498{
499 ASFContext *asf = s->priv_data;
500
501 asf->packet_size = PACKET_SIZE;
502 asf->nb_packets = 0;
503
504 asf->last_indexed_pts = 0;
505 asf->index_ptr = (ASFIndex*)av_malloc( sizeof(ASFIndex) * ASF_INDEX_BLOCK );
506 asf->nb_index_memory_alloc = ASF_INDEX_BLOCK;
507 asf->nb_index_count = 0;
508 asf->maximum_packet = 0;
509
510 if (asf_write_header1(s, 0, 50) < 0) {
511 //av_free(asf);
512 return -1;
513 }
514
515 put_flush_packet(&s->pb);
516
517 asf->packet_nb_payloads = 0;
518 asf->prev_packet_sent_time = 0;
519 asf->packet_timestamp_start = -1;
520 asf->packet_timestamp_end = -1;
521 init_put_byte(&asf->pb, asf->packet_buf, asf->packet_size, 1,
522 NULL, NULL, NULL, NULL);
523
524 return 0;
525}
526
527static int asf_write_stream_header(AVFormatContext *s)
528{
529 ASFContext *asf = s->priv_data;
530
531 asf->is_streamed = 1;
532
533 return asf_write_header(s);
534}
535
536static int put_payload_parsing_info(
537 AVFormatContext *s,
538 unsigned int sendtime,
539 unsigned int duration,
540 int nb_payloads,
541 int padsize
542 )
543{
544 ASFContext *asf = s->priv_data;
545 ByteIOContext *pb = &s->pb;
546 int ppi_size, i;
547 unsigned char *start_ppi_ptr = pb->buf_ptr;
548
549 int iLengthTypeFlags = ASF_PPI_LENGTH_TYPE_FLAGS;
550
551 put_byte(pb, ASF_PACKET_ERROR_CORRECTION_FLAGS);
552 for (i = 0; i < ASF_PACKET_ERROR_CORRECTION_DATA_SIZE; i++){
553 put_byte(pb, 0x0);
554 }
555
556 if (asf->multi_payloads_present)
557 iLengthTypeFlags |= ASF_PPI_FLAG_MULTIPLE_PAYLOADS_PRESENT;
558
559 if (padsize > 0) {
560 if (padsize < 256)
561 iLengthTypeFlags |= ASF_PPI_FLAG_PADDING_LENGTH_FIELD_IS_BYTE;
562 else
563 iLengthTypeFlags |= ASF_PPI_FLAG_PADDING_LENGTH_FIELD_IS_WORD;
564 }
565 put_byte(pb, iLengthTypeFlags);
566
567 put_byte(pb, ASF_PPI_PROPERTY_FLAGS);
568
569 if (iLengthTypeFlags & ASF_PPI_FLAG_PADDING_LENGTH_FIELD_IS_WORD)
570 put_le16(pb, padsize - 2);
571 if (iLengthTypeFlags & ASF_PPI_FLAG_PADDING_LENGTH_FIELD_IS_BYTE)
572 put_byte(pb, padsize - 1);
573
574 put_le32(pb, sendtime);
575 put_le16(pb, duration);
576 if (asf->multi_payloads_present)
577 put_byte(pb, nb_payloads | ASF_PAYLOAD_FLAGS);
578
579 ppi_size = pb->buf_ptr - start_ppi_ptr;
580
581 return ppi_size;
582}
583
584static void flush_packet(AVFormatContext *s)
585{
586 ASFContext *asf = s->priv_data;
587 int packet_hdr_size, packet_filled_size;
588
589 if (asf->is_streamed) {
590 put_chunk(s, 0x4424, asf->packet_size, 0);
591 }
592
593 packet_hdr_size = put_payload_parsing_info(
594 s,
595 asf->packet_timestamp_start,
596 asf->packet_timestamp_end - asf->packet_timestamp_start,
597 asf->packet_nb_payloads,
598 asf->packet_size_left
599 );
600
601 packet_filled_size = PACKET_SIZE - packet_hdr_size - asf->packet_size_left;
602 memset(asf->packet_buf + packet_filled_size, 0, asf->packet_size_left);
603
604 put_buffer(&s->pb, asf->packet_buf, asf->packet_size - packet_hdr_size);
605
606 put_flush_packet(&s->pb);
607 asf->nb_packets++;
608 asf->packet_nb_payloads = 0;
609 asf->prev_packet_sent_time = asf->packet_timestamp_start;
610 asf->packet_timestamp_start = -1;
611 asf->packet_timestamp_end = -1;
612 init_put_byte(&asf->pb, asf->packet_buf, asf->packet_size, 1,
613 NULL, NULL, NULL, NULL);
614}
615
616static void put_payload_header(
617 AVFormatContext *s,
618 ASFStream *stream,
619 int presentation_time,
620 int m_obj_size,
621 int m_obj_offset,
622 int payload_len,
623 int flags
624 )
625{
626 ASFContext *asf = s->priv_data;
627 ByteIOContext *pb = &asf->pb;
628 int val;
629
630 val = stream->num;
631 if (flags & PKT_FLAG_KEY)
632 val |= ASF_PL_FLAG_KEY_FRAME;
633 put_byte(pb, val);
634
635 put_byte(pb, stream->seq); //Media object number
636 put_le32(pb, m_obj_offset); //Offset Into Media Object
637
638 // Replicated Data shall be at least 8 bytes long.
639 // The first 4 bytes of data shall contain the
640 // Size of the Media Object that the payload belongs to.
641 // The next 4 bytes of data shall contain the
642 // Presentation Time for the media object that the payload belongs to.
643 put_byte(pb, ASF_PAYLOAD_REPLICATED_DATA_LENGTH);
644
645 put_le32(pb, m_obj_size); //Replicated Data - Media Object Size
646 put_le32(pb, presentation_time);//Replicated Data - Presentation Time
647
648 if (asf->multi_payloads_present){
649 put_le16(pb, payload_len); //payload length
650 }
651}
652
653static void put_frame(
654 AVFormatContext *s,
655 ASFStream *stream,
656 int timestamp,
657 const uint8_t *buf,
658 int m_obj_size,
659 int flags
660 )
661{
662 ASFContext *asf = s->priv_data;
663 int m_obj_offset, payload_len, frag_len1;
664
665 m_obj_offset = 0;
666 while (m_obj_offset < m_obj_size) {
667 payload_len = m_obj_size - m_obj_offset;
668 if (asf->packet_timestamp_start == -1) {
669 asf->multi_payloads_present = (payload_len < MULTI_PAYLOAD_CONSTANT);
670
671 if (asf->multi_payloads_present){
672 asf->packet_size_left = PACKET_SIZE; //For debug
673 asf->packet_size_left = PACKET_SIZE - PACKET_HEADER_MIN_SIZE - 1;
674 frag_len1 = MULTI_PAYLOAD_CONSTANT - 1;
675 }
676 else {
677 asf->packet_size_left = PACKET_SIZE - PACKET_HEADER_MIN_SIZE;
678 frag_len1 = SINGLE_PAYLOAD_DATA_LENGTH;
679 }
680 if (asf->prev_packet_sent_time > timestamp)
681 asf->packet_timestamp_start = asf->prev_packet_sent_time;
682 else
683 asf->packet_timestamp_start = timestamp;
684 }
685 else {
686 // multi payloads
687 frag_len1 = asf->packet_size_left - PAYLOAD_HEADER_SIZE_MULTIPLE_PAYLOADS;
688
689 if (asf->prev_packet_sent_time > timestamp)
690 asf->packet_timestamp_start = asf->prev_packet_sent_time;
691 else if (asf->packet_timestamp_start >= timestamp)
692 asf->packet_timestamp_start = timestamp;
693 }
694 if (frag_len1 > 0) {
695 if (payload_len > frag_len1)
696 payload_len = frag_len1;
697 else if (payload_len == (frag_len1 - 1))
698 payload_len = frag_len1 - 2; //additional byte need to put padding length
699
700 put_payload_header(s, stream, timestamp+preroll_time, m_obj_size, m_obj_offset, payload_len, flags);
701 put_buffer(&asf->pb, buf, payload_len);
702
703 if (asf->multi_payloads_present)
704 asf->packet_size_left -= (payload_len + PAYLOAD_HEADER_SIZE_MULTIPLE_PAYLOADS);
705 else
706 asf->packet_size_left -= (payload_len + PAYLOAD_HEADER_SIZE_SINGLE_PAYLOAD);
707 asf->packet_timestamp_end = timestamp;
708
709 asf->packet_nb_payloads++;
710 } else {
711 payload_len = 0;
712 }
713 m_obj_offset += payload_len;
714 buf += payload_len;
715
716 if (!asf->multi_payloads_present)
717 flush_packet(s);
718 else if (asf->packet_size_left <= (PAYLOAD_HEADER_SIZE_MULTIPLE_PAYLOADS + 1))
719 flush_packet(s);
720 }
721 stream->seq++;
722}
723
724static int asf_write_packet(AVFormatContext *s, AVPacket *pkt)
725{
726 ASFContext *asf = s->priv_data;
727 ASFStream *stream;
728 int64_t duration;
729 AVCodecContext *codec;
730 int64_t packet_st,pts;
731 int start_sec,i;
732
733 codec = s->streams[pkt->stream_index]->codec;
734 stream = &asf->streams[pkt->stream_index];
735
736 //XXX /FIXME use duration from AVPacket (quick hack by)
737 pts = (pkt->pts != AV_NOPTS_VALUE) ? pkt->pts : pkt->dts;
738 if (pts == AV_NOPTS_VALUE) {
739 if (codec->codec_type == CODEC_TYPE_AUDIO) {
740 duration = (codec->frame_number * (int64_t)codec->frame_size * int64_t_C(10000000)) /
741 codec->sample_rate;
742 } else {
743 duration = av_rescale(codec->frame_number * (int64_t)codec->time_base.num, 10000000, codec->time_base.den);
744 }
745 } else {
746 duration = pts * 10000;
747 }
748 if (duration > asf->duration)
749 asf->duration = duration;
750
751 packet_st = asf->nb_packets;
752 put_frame(s, stream, pkt->pts, pkt->data, pkt->size, pkt->flags);
753
754 /* check index */
755 if ((!asf->is_streamed) && (codec->codec_type == CODEC_TYPE_VIDEO) && (pkt->flags & PKT_FLAG_KEY)) {
756 start_sec = (int)(duration / int64_t_C(10000000));
757 if (start_sec != (int)(asf->last_indexed_pts / int64_t_C(10000000))) {
758 for(i=asf->nb_index_count;i<start_sec;i++) {
759 if (i>=asf->nb_index_memory_alloc) {
760 asf->nb_index_memory_alloc += ASF_INDEX_BLOCK;
761 asf->index_ptr = (ASFIndex*)av_realloc( asf->index_ptr, sizeof(ASFIndex) * asf->nb_index_memory_alloc );
762 }
763 // store
764 asf->index_ptr[i].packet_number = (uint32_t)packet_st;
765 asf->index_ptr[i].packet_count = (uint16_t)(asf->nb_packets-packet_st);
766 if (asf->maximum_packet < (uint16_t)(asf->nb_packets-packet_st))
767 asf->maximum_packet = (uint16_t)(asf->nb_packets-packet_st);
768 }
769 asf->nb_index_count = start_sec;
770 asf->last_indexed_pts = duration;
771 }
772 }
773 return 0;
774}
775
776//
777static int asf_write_index(AVFormatContext *s, ASFIndex *index, uint16_t max, uint32_t count)
778{
779 ByteIOContext *pb = &s->pb;
780 int i;
781
782 put_guid(pb, &simple_index_header);
783 put_le64(pb, 24 + 16 + 8 + 4 + 4 + (4 + 2)*count);
784 put_guid(pb, &my_guid);
785 put_le64(pb, ASF_INDEXED_INTERVAL);
786 put_le32(pb, max);
787 put_le32(pb, count);
788 for(i=0; i<count; i++) {
789 put_le32(pb, index[i].packet_number);
790 put_le16(pb, index[i].packet_count);
791 }
792
793 return 0;
794}
795
796static int asf_write_trailer(AVFormatContext *s)
797{
798 ASFContext *asf = s->priv_data;
799 int64_t file_size,data_size;
800
801 /* flush the current packet */
802 if (asf->pb.buf_ptr > asf->pb.buffer)
803 flush_packet(s);
804
805 /* write index */
806 data_size = url_ftell(&s->pb);
807 if ((!asf->is_streamed) && (asf->nb_index_count != 0)) {
808 asf_write_index(s, asf->index_ptr, asf->maximum_packet, asf->nb_index_count);
809 }
810 put_flush_packet(&s->pb);
811
812 if (asf->is_streamed) {
813 put_chunk(s, 0x4524, 0, 0); /* end of stream */
814 } else {
815 /* rewrite an updated header */
816 file_size = url_ftell(&s->pb);
817 url_fseek(&s->pb, 0, SEEK_SET);
818 asf_write_header1(s, file_size, data_size - asf->data_offset);
819 }
820
821 put_flush_packet(&s->pb);
822 av_free(asf->index_ptr);
823 return 0;
824}
825
826AVOutputFormat asf_muxer = {
827 "asf",
828 "asf format",
829 "video/x-ms-asf",
830 "asf,wmv,wma",
831 sizeof(ASFContext),
832#ifdef CONFIG_MP3LAME
833 CODEC_ID_MP3,
834#else
835 CODEC_ID_MP2,
836#endif
837 CODEC_ID_MSMPEG4V3,
838 asf_write_header,
839 asf_write_packet,
840 asf_write_trailer,
841 .flags = AVFMT_GLOBALHEADER,
842};
843
844AVOutputFormat asf_stream_muxer = {
845 "asf_stream",
846 "asf format",
847 "video/x-ms-asf",
848 "asf,wmv,wma",
849 sizeof(ASFContext),
850#ifdef CONFIG_MP3LAME
851 CODEC_ID_MP3,
852#else
853 CODEC_ID_MP2,
854#endif
855 CODEC_ID_MSMPEG4V3,
856 asf_write_stream_header,
857 asf_write_packet,
858 asf_write_trailer,
859 .flags = AVFMT_GLOBALHEADER,
860};
861#endif //CONFIG_MUXERS
Note: See TracBrowser for help on using the repository browser.

© 2024 Oracle Support Privacy / Do Not Sell My Info Terms of Use Trademark Policy Automated Access Etiquette