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path: root/libavformat/asfenc.c (plain)
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1/*
2 * ASF muxer
3 * Copyright (c) 2000, 2001 Fabrice Bellard
4 *
5 * This file is part of FFmpeg.
6 *
7 * FFmpeg 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 * FFmpeg 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 FFmpeg; 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/avassert.h"
23#include "libavutil/dict.h"
24#include "libavutil/mathematics.h"
25#include "libavutil/parseutils.h"
26#include "libavutil/opt.h"
27#include "avformat.h"
28#include "avlanguage.h"
29#include "avio_internal.h"
30#include "internal.h"
31#include "riff.h"
32#include "asf.h"
33
34#define ASF_INDEXED_INTERVAL 10000000
35#define ASF_INDEX_BLOCK (1<<9)
36#define ASF_PAYLOADS_PER_PACKET 63
37
38#define ASF_PACKET_ERROR_CORRECTION_DATA_SIZE 0x2
39#define ASF_PACKET_ERROR_CORRECTION_FLAGS \
40 (ASF_PACKET_FLAG_ERROR_CORRECTION_PRESENT | \
41 ASF_PACKET_ERROR_CORRECTION_DATA_SIZE)
42
43#if (ASF_PACKET_ERROR_CORRECTION_FLAGS != 0)
44# define ASF_PACKET_ERROR_CORRECTION_FLAGS_FIELD_SIZE 1
45#else
46# define ASF_PACKET_ERROR_CORRECTION_FLAGS_FIELD_SIZE 0
47#endif
48
49#define ASF_PPI_PROPERTY_FLAGS \
50 (ASF_PL_FLAG_REPLICATED_DATA_LENGTH_FIELD_IS_BYTE | \
51 ASF_PL_FLAG_OFFSET_INTO_MEDIA_OBJECT_LENGTH_FIELD_IS_DWORD | \
52 ASF_PL_FLAG_MEDIA_OBJECT_NUMBER_LENGTH_FIELD_IS_BYTE | \
53 ASF_PL_FLAG_STREAM_NUMBER_LENGTH_FIELD_IS_BYTE)
54
55#define ASF_PPI_LENGTH_TYPE_FLAGS 0
56
57#define ASF_PAYLOAD_FLAGS ASF_PL_FLAG_PAYLOAD_LENGTH_FIELD_IS_WORD
58
59#if (ASF_PPI_FLAG_SEQUENCE_FIELD_IS_BYTE == (ASF_PPI_LENGTH_TYPE_FLAGS & ASF_PPI_MASK_SEQUENCE_FIELD_SIZE))
60# define ASF_PPI_SEQUENCE_FIELD_SIZE 1
61#endif
62#if (ASF_PPI_FLAG_SEQUENCE_FIELD_IS_WORD == (ASF_PPI_LENGTH_TYPE_FLAGS & ASF_PPI_MASK_SEQUENCE_FIELD_SIZE))
63# define ASF_PPI_SEQUENCE_FIELD_SIZE 2
64#endif
65#if (ASF_PPI_FLAG_SEQUENCE_FIELD_IS_DWORD == (ASF_PPI_LENGTH_TYPE_FLAGS & ASF_PPI_MASK_SEQUENCE_FIELD_SIZE))
66# define ASF_PPI_SEQUENCE_FIELD_SIZE 4
67#endif
68#ifndef ASF_PPI_SEQUENCE_FIELD_SIZE
69# define ASF_PPI_SEQUENCE_FIELD_SIZE 0
70#endif
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// Replicated Data shall be at least 8 bytes long.
159#define ASF_PAYLOAD_REPLICATED_DATA_LENGTH 0x08
160
161#define PAYLOAD_HEADER_SIZE_SINGLE_PAYLOAD \
162 (1 + /* Stream Number */ \
163 ASF_PAYLOAD_MEDIA_OBJECT_NUMBER_FIELD_SIZE + \
164 ASF_PAYLOAD_OFFSET_INTO_MEDIA_OBJECT_FIELD_SIZE + \
165 ASF_PAYLOAD_REPLICATED_DATA_LENGTH_FIELD_SIZE + \
166 ASF_PAYLOAD_REPLICATED_DATA_LENGTH)
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#define SINGLE_PAYLOAD_HEADERS \
177 (PACKET_HEADER_MIN_SIZE + \
178 PAYLOAD_HEADER_SIZE_SINGLE_PAYLOAD)
179
180#define MULTI_PAYLOAD_HEADERS \
181 (PACKET_HEADER_MIN_SIZE + \
182 1 + /* Payload Flags */ \
183 2 * PAYLOAD_HEADER_SIZE_MULTIPLE_PAYLOADS)
184
185#define DATA_HEADER_SIZE 50
186
187#define PACKET_SIZE_MAX 65536
188#define PACKET_SIZE_MIN 100
189
190typedef struct ASFPayload {
191 uint8_t type;
192 uint16_t size;
193} ASFPayload;
194
195typedef struct ASFStream {
196 int num;
197 unsigned char seq;
198 /* use for reading */
199 AVPacket pkt;
200 int frag_offset;
201 int packet_obj_size;
202 int timestamp;
203 int64_t duration;
204 int skip_to_key;
205 int pkt_clean;
206
207 int ds_span; /* descrambling */
208 int ds_packet_size;
209 int ds_chunk_size;
210
211 int64_t packet_pos;
212
213 uint16_t stream_language_index;
214
215 int palette_changed;
216 uint32_t palette[256];
217
218 int payload_ext_ct;
219 ASFPayload payload[8];
220} ASFStream;
221
222typedef struct ASFContext {
223 AVClass *av_class;
224 uint32_t seqno;
225 int is_streamed;
226 ASFStream streams[128]; ///< it's max number and it's not that big
227 const char *languages[128];
228 int nb_languages;
229 int64_t creation_time;
230 /* non-streamed additional info */
231 uint64_t nb_packets; ///< how many packets are there in the file, invalid if broadcasting
232 int64_t duration; ///< in 100ns units
233 /* packet filling */
234 unsigned char multi_payloads_present;
235 int packet_size_left;
236 int64_t packet_timestamp_start;
237 int64_t packet_timestamp_end;
238 unsigned int packet_nb_payloads;
239 uint8_t packet_buf[PACKET_SIZE_MAX];
240 AVIOContext pb;
241 /* only for reading */
242 uint64_t data_offset; ///< beginning of the first data packet
243
244 ASFIndex *index_ptr;
245 uint32_t nb_index_memory_alloc;
246 uint16_t maximum_packet;
247 uint32_t next_packet_number;
248 uint16_t next_packet_count;
249 uint64_t next_packet_offset;
250 int next_start_sec;
251 int end_sec;
252 int packet_size;
253} ASFContext;
254
255static const AVCodecTag codec_asf_bmp_tags[] = {
256 { AV_CODEC_ID_MPEG4, MKTAG('M', '4', 'S', '2') },
257 { AV_CODEC_ID_MPEG4, MKTAG('M', 'P', '4', 'S') },
258 { AV_CODEC_ID_MSMPEG4V3, MKTAG('M', 'P', '4', '3') },
259 { AV_CODEC_ID_NONE, 0 },
260};
261
262#define PREROLL_TIME 3100
263
264static void put_str16(AVIOContext *s, const char *tag)
265{
266 int len;
267 uint8_t *pb;
268 AVIOContext *dyn_buf;
269 if (avio_open_dyn_buf(&dyn_buf) < 0)
270 return;
271
272 avio_put_str16le(dyn_buf, tag);
273 len = avio_close_dyn_buf(dyn_buf, &pb);
274 avio_wl16(s, len);
275 avio_write(s, pb, len);
276 av_freep(&pb);
277}
278
279static int64_t put_header(AVIOContext *pb, const ff_asf_guid *g)
280{
281 int64_t pos;
282
283 pos = avio_tell(pb);
284 ff_put_guid(pb, g);
285 avio_wl64(pb, 24);
286 return pos;
287}
288
289/* update header size */
290static void end_header(AVIOContext *pb, int64_t pos)
291{
292 int64_t pos1;
293
294 pos1 = avio_tell(pb);
295 avio_seek(pb, pos + 16, SEEK_SET);
296 avio_wl64(pb, pos1 - pos);
297 avio_seek(pb, pos1, SEEK_SET);
298}
299
300/* write an asf chunk (only used in streaming case) */
301static void put_chunk(AVFormatContext *s, int type,
302 int payload_length, int flags)
303{
304 ASFContext *asf = s->priv_data;
305 AVIOContext *pb = s->pb;
306 int length;
307
308 length = payload_length + 8;
309 avio_wl16(pb, type);
310 avio_wl16(pb, length); // size
311 avio_wl32(pb, asf->seqno); // sequence number
312 avio_wl16(pb, flags); // unknown bytes
313 avio_wl16(pb, length); // size_confirm
314 asf->seqno++;
315}
316
317/* convert from av time to windows time */
318static int64_t unix_to_file_time(int64_t ti)
319{
320 int64_t t;
321
322 t = ti * INT64_C(10);
323 t += INT64_C(116444736000000000);
324 return t;
325}
326
327static int32_t get_send_time(ASFContext *asf, int64_t pres_time, uint64_t *offset)
328{
329 int i;
330 int32_t send_time = 0;
331 *offset = asf->data_offset + DATA_HEADER_SIZE;
332 for (i = 0; i < asf->next_start_sec; i++) {
333 if (pres_time <= asf->index_ptr[i].send_time)
334 break;
335 send_time = asf->index_ptr[i].send_time;
336 *offset = asf->index_ptr[i].offset;
337 }
338
339 return send_time / 10000;
340}
341
342static int asf_write_markers(AVFormatContext *s)
343{
344 ASFContext *asf = s->priv_data;
345 AVIOContext *pb = s->pb;
346 int i;
347 AVRational scale = {1, 10000000};
348 int64_t hpos = put_header(pb, &ff_asf_marker_header);
349
350 ff_put_guid(pb, &ff_asf_reserved_4);// ASF spec mandates this reserved value
351 avio_wl32(pb, s->nb_chapters); // markers count
352 avio_wl16(pb, 0); // ASF spec mandates 0 for this
353 avio_wl16(pb, 0); // name length 0, no name given
354
355 for (i = 0; i < s->nb_chapters; i++) {
356 AVChapter *c = s->chapters[i];
357 AVDictionaryEntry *t = av_dict_get(c->metadata, "title", NULL, 0);
358 int64_t pres_time = av_rescale_q(c->start, c->time_base, scale);
359 uint64_t offset;
360 int32_t send_time = get_send_time(asf, pres_time, &offset);
361 int len = 0;
362 uint8_t *buf;
363 AVIOContext *dyn_buf;
364 if (t) {
365 if (avio_open_dyn_buf(&dyn_buf) < 0)
366 return AVERROR(ENOMEM);
367 avio_put_str16le(dyn_buf, t->value);
368 len = avio_close_dyn_buf(dyn_buf, &buf);
369 }
370 avio_wl64(pb, offset); // offset of the packet with send_time
371 avio_wl64(pb, pres_time + PREROLL_TIME * 10000); // presentation time
372 avio_wl16(pb, 12 + len); // entry length
373 avio_wl32(pb, send_time); // send time
374 avio_wl32(pb, 0); // flags, should be 0
375 avio_wl32(pb, len / 2); // marker desc length in WCHARS!
376 if (t) {
377 avio_write(pb, buf, len); // marker desc
378 av_freep(&buf);
379 }
380 }
381 end_header(pb, hpos);
382 return 0;
383}
384
385/* write the header (used two times if non streamed) */
386static int asf_write_header1(AVFormatContext *s, int64_t file_size,
387 int64_t data_chunk_size)
388{
389 ASFContext *asf = s->priv_data;
390 AVIOContext *pb = s->pb;
391 AVDictionaryEntry *tags[5];
392 int header_size, n, extra_size, extra_size2, wav_extra_size;
393 int has_title, has_aspect_ratio = 0;
394 int metadata_count;
395 AVCodecParameters *par;
396 int64_t header_offset, cur_pos, hpos;
397 int bit_rate;
398 int64_t duration;
399 int audio_language_counts[128] = { 0 };
400
401 ff_metadata_conv(&s->metadata, ff_asf_metadata_conv, NULL);
402
403 tags[0] = av_dict_get(s->metadata, "title", NULL, 0);
404 tags[1] = av_dict_get(s->metadata, "author", NULL, 0);
405 tags[2] = av_dict_get(s->metadata, "copyright", NULL, 0);
406 tags[3] = av_dict_get(s->metadata, "comment", NULL, 0);
407 tags[4] = av_dict_get(s->metadata, "rating", NULL, 0);
408
409 duration = asf->duration + PREROLL_TIME * 10000;
410 has_title = tags[0] || tags[1] || tags[2] || tags[3] || tags[4];
411
412 if (!file_size) {
413 if (ff_parse_creation_time_metadata(s, &asf->creation_time, 0) != 0)
414 av_dict_set(&s->metadata, "creation_time", NULL, 0);
415 }
416
417 metadata_count = av_dict_count(s->metadata);
418
419 bit_rate = 0;
420 for (n = 0; n < s->nb_streams; n++) {
421 AVDictionaryEntry *entry;
422 par = s->streams[n]->codecpar;
423
424 avpriv_set_pts_info(s->streams[n], 32, 1, 1000); /* 32 bit pts in ms */
425
426 bit_rate += par->bit_rate;
427 if ( par->codec_type == AVMEDIA_TYPE_VIDEO
428 && par->sample_aspect_ratio.num > 0
429 && par->sample_aspect_ratio.den > 0)
430 has_aspect_ratio++;
431
432 entry = av_dict_get(s->streams[n]->metadata, "language", NULL, 0);
433 if (entry) {
434 const char *iso6391lang = ff_convert_lang_to(entry->value, AV_LANG_ISO639_1);
435 if (iso6391lang) {
436 int i;
437 for (i = 0; i < asf->nb_languages; i++) {
438 if (!strcmp(asf->languages[i], iso6391lang)) {
439 asf->streams[n].stream_language_index = i;
440 break;
441 }
442 }
443 if (i >= asf->nb_languages) {
444 asf->languages[asf->nb_languages] = iso6391lang;
445 asf->streams[n].stream_language_index = asf->nb_languages;
446 asf->nb_languages++;
447 }
448 if (par->codec_type == AVMEDIA_TYPE_AUDIO)
449 audio_language_counts[asf->streams[n].stream_language_index]++;
450 }
451 } else {
452 asf->streams[n].stream_language_index = 128;
453 }
454 }
455
456 if (asf->is_streamed) {
457 put_chunk(s, 0x4824, 0, 0xc00); /* start of stream (length will be patched later) */
458 }
459
460 ff_put_guid(pb, &ff_asf_header);
461 avio_wl64(pb, -1); /* header length, will be patched after */
462 avio_wl32(pb, 3 + has_title + !!metadata_count + s->nb_streams); /* number of chunks in header */
463 avio_w8(pb, 1); /* ??? */
464 avio_w8(pb, 2); /* ??? */
465
466 /* file header */
467 header_offset = avio_tell(pb);
468 hpos = put_header(pb, &ff_asf_file_header);
469 ff_put_guid(pb, &ff_asf_my_guid);
470 avio_wl64(pb, file_size);
471 avio_wl64(pb, unix_to_file_time(asf->creation_time));
472 avio_wl64(pb, asf->nb_packets); /* number of packets */
473 avio_wl64(pb, duration); /* end time stamp (in 100ns units) */
474 avio_wl64(pb, asf->duration); /* duration (in 100ns units) */
475 avio_wl64(pb, PREROLL_TIME); /* start time stamp */
476 avio_wl32(pb, (asf->is_streamed || !(pb->seekable & AVIO_SEEKABLE_NORMAL)) ? 3 : 2); /* ??? */
477 avio_wl32(pb, s->packet_size); /* packet size */
478 avio_wl32(pb, s->packet_size); /* packet size */
479 avio_wl32(pb, bit_rate ? bit_rate : -1); /* Maximum data rate in bps */
480 end_header(pb, hpos);
481
482 /* header_extension */
483 hpos = put_header(pb, &ff_asf_head1_guid);
484 ff_put_guid(pb, &ff_asf_head2_guid);
485 avio_wl16(pb, 6);
486 avio_wl32(pb, 0); /* length, to be filled later */
487 if (asf->nb_languages) {
488 int64_t hpos2;
489 int i;
490 int nb_audio_languages = 0;
491
492 hpos2 = put_header(pb, &ff_asf_language_guid);
493 avio_wl16(pb, asf->nb_languages);
494 for (i = 0; i < asf->nb_languages; i++) {
495 avio_w8(pb, 6);
496 avio_put_str16le(pb, asf->languages[i]);
497 }
498 end_header(pb, hpos2);
499
500 for (i = 0; i < asf->nb_languages; i++)
501 if (audio_language_counts[i])
502 nb_audio_languages++;
503
504 if (nb_audio_languages > 1) {
505 hpos2 = put_header(pb, &ff_asf_group_mutual_exclusion_object);
506 ff_put_guid(pb, &ff_asf_mutex_language);
507 avio_wl16(pb, nb_audio_languages);
508 for (i = 0; i < asf->nb_languages; i++) {
509 if (audio_language_counts[i]) {
510 avio_wl16(pb, audio_language_counts[i]);
511 for (n = 0; n < s->nb_streams; n++)
512 if (asf->streams[n].stream_language_index == i && s->streams[n]->codecpar->codec_type == AVMEDIA_TYPE_AUDIO)
513 avio_wl16(pb, n + 1);
514 }
515 }
516 end_header(pb, hpos2);
517 }
518
519 for (n = 0; n < s->nb_streams; n++) {
520 int64_t es_pos;
521 if (asf->streams[n].stream_language_index > 127)
522 continue;
523 es_pos = put_header(pb, &ff_asf_extended_stream_properties_object);
524 avio_wl64(pb, 0); /* start time */
525 avio_wl64(pb, 0); /* end time */
526 avio_wl32(pb, s->streams[n]->codecpar->bit_rate); /* data bitrate bps */
527 avio_wl32(pb, 5000); /* buffer size ms */
528 avio_wl32(pb, 0); /* initial buffer fullness */
529 avio_wl32(pb, s->streams[n]->codecpar->bit_rate); /* peak data bitrate */
530 avio_wl32(pb, 5000); /* maximum buffer size ms */
531 avio_wl32(pb, 0); /* max initial buffer fullness */
532 avio_wl32(pb, 0); /* max object size */
533 avio_wl32(pb, (!asf->is_streamed && (pb->seekable & AVIO_SEEKABLE_NORMAL)) << 1); /* flags - seekable */
534 avio_wl16(pb, n + 1); /* stream number */
535 avio_wl16(pb, asf->streams[n].stream_language_index); /* language id index */
536 avio_wl64(pb, 0); /* avg time per frame */
537 avio_wl16(pb, 0); /* stream name count */
538 avio_wl16(pb, 0); /* payload extension system count */
539 end_header(pb, es_pos);
540 }
541 }
542 if (has_aspect_ratio) {
543 int64_t hpos2;
544 hpos2 = put_header(pb, &ff_asf_metadata_header);
545 avio_wl16(pb, 2 * has_aspect_ratio);
546 for (n = 0; n < s->nb_streams; n++) {
547 par = s->streams[n]->codecpar;
548 if ( par->codec_type == AVMEDIA_TYPE_VIDEO
549 && par->sample_aspect_ratio.num > 0
550 && par->sample_aspect_ratio.den > 0) {
551 AVRational sar = par->sample_aspect_ratio;
552 avio_wl16(pb, 0);
553 // the stream number is set like this below
554 avio_wl16(pb, n + 1);
555 avio_wl16(pb, 26); // name_len
556 avio_wl16(pb, 3); // value_type
557 avio_wl32(pb, 4); // value_len
558 avio_put_str16le(pb, "AspectRatioX");
559 avio_wl32(pb, sar.num);
560 avio_wl16(pb, 0);
561 // the stream number is set like this below
562 avio_wl16(pb, n + 1);
563 avio_wl16(pb, 26); // name_len
564 avio_wl16(pb, 3); // value_type
565 avio_wl32(pb, 4); // value_len
566 avio_put_str16le(pb, "AspectRatioY");
567 avio_wl32(pb, sar.den);
568 }
569 }
570 end_header(pb, hpos2);
571 }
572 {
573 int64_t pos1;
574 pos1 = avio_tell(pb);
575 avio_seek(pb, hpos + 42, SEEK_SET);
576 avio_wl32(pb, pos1 - hpos - 46);
577 avio_seek(pb, pos1, SEEK_SET);
578 }
579 end_header(pb, hpos);
580
581 /* title and other info */
582 if (has_title) {
583 int len;
584 uint8_t *buf;
585 AVIOContext *dyn_buf;
586
587 if (avio_open_dyn_buf(&dyn_buf) < 0)
588 return AVERROR(ENOMEM);
589
590 hpos = put_header(pb, &ff_asf_comment_header);
591
592 for (n = 0; n < FF_ARRAY_ELEMS(tags); n++) {
593 len = tags[n] ? avio_put_str16le(dyn_buf, tags[n]->value) : 0;
594 avio_wl16(pb, len);
595 }
596 len = avio_close_dyn_buf(dyn_buf, &buf);
597 avio_write(pb, buf, len);
598 av_freep(&buf);
599 end_header(pb, hpos);
600 }
601 if (metadata_count) {
602 AVDictionaryEntry *tag = NULL;
603 hpos = put_header(pb, &ff_asf_extended_content_header);
604 avio_wl16(pb, metadata_count);
605 while ((tag = av_dict_get(s->metadata, "", tag, AV_DICT_IGNORE_SUFFIX))) {
606 put_str16(pb, tag->key);
607 avio_wl16(pb, 0);
608 put_str16(pb, tag->value);
609 }
610 end_header(pb, hpos);
611 }
612 /* chapters using ASF markers */
613 if (!asf->is_streamed && s->nb_chapters) {
614 int ret;
615 if ((ret = asf_write_markers(s)) < 0)
616 return ret;
617 }
618 /* stream headers */
619 for (n = 0; n < s->nb_streams; n++) {
620 int64_t es_pos;
621 // ASFStream *stream = &asf->streams[n];
622
623 par = s->streams[n]->codecpar;
624 asf->streams[n].num = n + 1;
625 asf->streams[n].seq = 1;
626
627 switch (par->codec_type) {
628 case AVMEDIA_TYPE_AUDIO:
629 wav_extra_size = 0;
630 extra_size = 18 + wav_extra_size;
631 extra_size2 = 8;
632 break;
633 default:
634 case AVMEDIA_TYPE_VIDEO:
635 wav_extra_size = par->extradata_size;
636 extra_size = 0x33 + wav_extra_size;
637 extra_size2 = 0;
638 break;
639 }
640
641 hpos = put_header(pb, &ff_asf_stream_header);
642 if (par->codec_type == AVMEDIA_TYPE_AUDIO) {
643 ff_put_guid(pb, &ff_asf_audio_stream);
644 ff_put_guid(pb, &ff_asf_audio_conceal_spread);
645 } else {
646 ff_put_guid(pb, &ff_asf_video_stream);
647 ff_put_guid(pb, &ff_asf_video_conceal_none);
648 }
649 avio_wl64(pb, 0); /* ??? */
650 es_pos = avio_tell(pb);
651 avio_wl32(pb, extra_size); /* wav header len */
652 avio_wl32(pb, extra_size2); /* additional data len */
653 avio_wl16(pb, n + 1); /* stream number */
654 avio_wl32(pb, 0); /* ??? */
655
656 if (par->codec_type == AVMEDIA_TYPE_AUDIO) {
657 /* WAVEFORMATEX header */
658 int wavsize = ff_put_wav_header(s, pb, par, FF_PUT_WAV_HEADER_FORCE_WAVEFORMATEX);
659
660 if (wavsize < 0)
661 return -1;
662 if (wavsize != extra_size) {
663 cur_pos = avio_tell(pb);
664 avio_seek(pb, es_pos, SEEK_SET);
665 avio_wl32(pb, wavsize); /* wav header len */
666 avio_seek(pb, cur_pos, SEEK_SET);
667 }
668 /* ERROR Correction */
669 avio_w8(pb, 0x01);
670 if (par->codec_id == AV_CODEC_ID_ADPCM_G726 || !par->block_align) {
671 avio_wl16(pb, 0x0190);
672 avio_wl16(pb, 0x0190);
673 } else {
674 avio_wl16(pb, par->block_align);
675 avio_wl16(pb, par->block_align);
676 }
677 avio_wl16(pb, 0x01);
678 avio_w8(pb, 0x00);
679 } else {
680 avio_wl32(pb, par->width);
681 avio_wl32(pb, par->height);
682 avio_w8(pb, 2); /* ??? */
683 avio_wl16(pb, 40 + par->extradata_size); /* size */
684
685 /* BITMAPINFOHEADER header */
686 ff_put_bmp_header(pb, par, ff_codec_bmp_tags, 1, 0);
687 }
688 end_header(pb, hpos);
689 }
690
691 /* media comments */
692
693 hpos = put_header(pb, &ff_asf_codec_comment_header);
694 ff_put_guid(pb, &ff_asf_codec_comment1_header);
695 avio_wl32(pb, s->nb_streams);
696 for (n = 0; n < s->nb_streams; n++) {
697 const AVCodecDescriptor *codec_desc;
698 const char *desc;
699
700 par = s->streams[n]->codecpar;
701 codec_desc = avcodec_descriptor_get(par->codec_id);
702
703 if (par->codec_type == AVMEDIA_TYPE_AUDIO)
704 avio_wl16(pb, 2);
705 else if (par->codec_type == AVMEDIA_TYPE_VIDEO)
706 avio_wl16(pb, 1);
707 else
708 avio_wl16(pb, -1);
709
710 if (par->codec_id == AV_CODEC_ID_WMAV2)
711 desc = "Windows Media Audio V8";
712 else
713 desc = codec_desc ? codec_desc->name : NULL;
714
715 if (desc) {
716 AVIOContext *dyn_buf;
717 uint8_t *buf;
718 int len;
719
720 if (avio_open_dyn_buf(&dyn_buf) < 0)
721 return AVERROR(ENOMEM);
722
723 avio_put_str16le(dyn_buf, desc);
724 len = avio_close_dyn_buf(dyn_buf, &buf);
725 avio_wl16(pb, len / 2); // "number of characters" = length in bytes / 2
726
727 avio_write(pb, buf, len);
728 av_freep(&buf);
729 } else
730 avio_wl16(pb, 0);
731
732 avio_wl16(pb, 0); /* no parameters */
733
734 /* id */
735 if (par->codec_type == AVMEDIA_TYPE_AUDIO) {
736 avio_wl16(pb, 2);
737 avio_wl16(pb, par->codec_tag);
738 } else {
739 avio_wl16(pb, 4);
740 avio_wl32(pb, par->codec_tag);
741 }
742 if (!par->codec_tag)
743 return -1;
744 }
745 end_header(pb, hpos);
746
747 /* patch the header size fields */
748
749 cur_pos = avio_tell(pb);
750 header_size = cur_pos - header_offset;
751 if (asf->is_streamed) {
752 header_size += 8 + 30 + DATA_HEADER_SIZE;
753
754 avio_seek(pb, header_offset - 10 - 30, SEEK_SET);
755 avio_wl16(pb, header_size);
756 avio_seek(pb, header_offset - 2 - 30, SEEK_SET);
757 avio_wl16(pb, header_size);
758
759 header_size -= 8 + 30 + DATA_HEADER_SIZE;
760 }
761 header_size += 24 + 6;
762 avio_seek(pb, header_offset - 14, SEEK_SET);
763 avio_wl64(pb, header_size);
764 avio_seek(pb, cur_pos, SEEK_SET);
765
766 /* movie chunk, followed by packets of packet_size */
767 asf->data_offset = cur_pos;
768 ff_put_guid(pb, &ff_asf_data_header);
769 avio_wl64(pb, data_chunk_size);
770 ff_put_guid(pb, &ff_asf_my_guid);
771 avio_wl64(pb, asf->nb_packets); /* nb packets */
772 avio_w8(pb, 1); /* ??? */
773 avio_w8(pb, 1); /* ??? */
774 return 0;
775}
776
777static int asf_write_header(AVFormatContext *s)
778{
779 ASFContext *asf = s->priv_data;
780
781 s->packet_size = asf->packet_size;
782 s->max_interleave_delta = 0;
783 asf->nb_packets = 0;
784
785 if (s->nb_streams > 127) {
786 av_log(s, AV_LOG_ERROR, "ASF can only handle 127 streams\n");
787 return AVERROR(EINVAL);
788 }
789
790 asf->index_ptr = av_malloc(sizeof(ASFIndex) * ASF_INDEX_BLOCK);
791 if (!asf->index_ptr)
792 return AVERROR(ENOMEM);
793 asf->nb_index_memory_alloc = ASF_INDEX_BLOCK;
794 asf->maximum_packet = 0;
795
796 /* the data-chunk-size has to be 50 (DATA_HEADER_SIZE), which is
797 * data_size - asf->data_offset at the moment this function is done.
798 * It is needed to use asf as a streamable format. */
799 if (asf_write_header1(s, 0, DATA_HEADER_SIZE) < 0) {
800 //av_free(asf);
801 av_freep(&asf->index_ptr);
802 return -1;
803 }
804
805 avio_flush(s->pb);
806
807 asf->packet_nb_payloads = 0;
808 asf->packet_timestamp_start = -1;
809 asf->packet_timestamp_end = -1;
810 ffio_init_context(&asf->pb, asf->packet_buf, s->packet_size, 1,
811 NULL, NULL, NULL, NULL);
812
813 if (s->avoid_negative_ts < 0)
814 s->avoid_negative_ts = 1;
815
816 return 0;
817}
818
819static int asf_write_stream_header(AVFormatContext *s)
820{
821 ASFContext *asf = s->priv_data;
822
823 asf->is_streamed = 1;
824
825 return asf_write_header(s);
826}
827
828static int put_payload_parsing_info(AVFormatContext *s,
829 unsigned sendtime, unsigned duration,
830 int nb_payloads, int padsize)
831{
832 ASFContext *asf = s->priv_data;
833 AVIOContext *pb = s->pb;
834 int ppi_size, i;
835 int64_t start = avio_tell(pb);
836
837 int iLengthTypeFlags = ASF_PPI_LENGTH_TYPE_FLAGS;
838
839 padsize -= PACKET_HEADER_MIN_SIZE;
840 if (asf->multi_payloads_present)
841 padsize--;
842 av_assert0(padsize >= 0);
843
844 avio_w8(pb, ASF_PACKET_ERROR_CORRECTION_FLAGS);
845 for (i = 0; i < ASF_PACKET_ERROR_CORRECTION_DATA_SIZE; i++)
846 avio_w8(pb, 0x0);
847
848 if (asf->multi_payloads_present)
849 iLengthTypeFlags |= ASF_PPI_FLAG_MULTIPLE_PAYLOADS_PRESENT;
850
851 if (padsize > 0) {
852 if (padsize < 256)
853 iLengthTypeFlags |= ASF_PPI_FLAG_PADDING_LENGTH_FIELD_IS_BYTE;
854 else
855 iLengthTypeFlags |= ASF_PPI_FLAG_PADDING_LENGTH_FIELD_IS_WORD;
856 }
857 avio_w8(pb, iLengthTypeFlags);
858
859 avio_w8(pb, ASF_PPI_PROPERTY_FLAGS);
860
861 if (iLengthTypeFlags & ASF_PPI_FLAG_PADDING_LENGTH_FIELD_IS_WORD)
862 avio_wl16(pb, padsize - 2);
863 if (iLengthTypeFlags & ASF_PPI_FLAG_PADDING_LENGTH_FIELD_IS_BYTE)
864 avio_w8(pb, padsize - 1);
865
866 avio_wl32(pb, sendtime);
867 avio_wl16(pb, duration);
868 if (asf->multi_payloads_present)
869 avio_w8(pb, nb_payloads | ASF_PAYLOAD_FLAGS);
870
871 ppi_size = avio_tell(pb) - start;
872
873 return ppi_size;
874}
875
876static void flush_packet(AVFormatContext *s)
877{
878 ASFContext *asf = s->priv_data;
879 int packet_hdr_size, packet_filled_size;
880
881 av_assert0(asf->packet_timestamp_end >= asf->packet_timestamp_start);
882
883 if (asf->is_streamed)
884 put_chunk(s, 0x4424, s->packet_size, 0);
885
886 packet_hdr_size = put_payload_parsing_info(s,
887 asf->packet_timestamp_start,
888 asf->packet_timestamp_end - asf->packet_timestamp_start,
889 asf->packet_nb_payloads,
890 asf->packet_size_left);
891
892 packet_filled_size = asf->packet_size - asf->packet_size_left;
893 av_assert0(packet_hdr_size <= asf->packet_size_left);
894 memset(asf->packet_buf + packet_filled_size, 0, asf->packet_size_left);
895
896 avio_write(s->pb, asf->packet_buf, s->packet_size - packet_hdr_size);
897
898 avio_flush(s->pb);
899 asf->nb_packets++;
900 asf->packet_nb_payloads = 0;
901 asf->packet_timestamp_start = -1;
902 asf->packet_timestamp_end = -1;
903 ffio_init_context(&asf->pb, asf->packet_buf, s->packet_size, 1,
904 NULL, NULL, NULL, NULL);
905}
906
907static void put_payload_header(AVFormatContext *s, ASFStream *stream,
908 int64_t presentation_time, int m_obj_size,
909 int m_obj_offset, int payload_len, int flags)
910{
911 ASFContext *asf = s->priv_data;
912 AVIOContext *pb = &asf->pb;
913 int val;
914
915 val = stream->num;
916 if (flags & AV_PKT_FLAG_KEY)
917 val |= ASF_PL_FLAG_KEY_FRAME;
918 avio_w8(pb, val);
919
920 avio_w8(pb, stream->seq); // Media object number
921 avio_wl32(pb, m_obj_offset); // Offset Into Media Object
922
923 // Replicated Data shall be at least 8 bytes long.
924 // The first 4 bytes of data shall contain the
925 // Size of the Media Object that the payload belongs to.
926 // The next 4 bytes of data shall contain the
927 // Presentation Time for the media object that the payload belongs to.
928 avio_w8(pb, ASF_PAYLOAD_REPLICATED_DATA_LENGTH);
929
930 avio_wl32(pb, m_obj_size); // Replicated Data - Media Object Size
931 avio_wl32(pb, (uint32_t) presentation_time); // Replicated Data - Presentation Time
932
933 if (asf->multi_payloads_present) {
934 avio_wl16(pb, payload_len); // payload length
935 }
936}
937
938static void put_frame(AVFormatContext *s, ASFStream *stream, AVStream *avst,
939 int64_t timestamp, const uint8_t *buf,
940 int m_obj_size, int flags)
941{
942 ASFContext *asf = s->priv_data;
943 int m_obj_offset, payload_len, frag_len1;
944
945 m_obj_offset = 0;
946 while (m_obj_offset < m_obj_size) {
947 payload_len = m_obj_size - m_obj_offset;
948 if (asf->packet_timestamp_start == -1) {
949 const int multi_payload_constant = (asf->packet_size - MULTI_PAYLOAD_HEADERS);
950 asf->multi_payloads_present = (payload_len < multi_payload_constant);
951
952 asf->packet_size_left = asf->packet_size;
953 if (asf->multi_payloads_present) {
954 frag_len1 = multi_payload_constant - 1;
955 } else {
956 frag_len1 = asf->packet_size - SINGLE_PAYLOAD_HEADERS;
957 }
958 asf->packet_timestamp_start = timestamp;
959 } else {
960 // multi payloads
961 frag_len1 = asf->packet_size_left -
962 PAYLOAD_HEADER_SIZE_MULTIPLE_PAYLOADS -
963 PACKET_HEADER_MIN_SIZE - 1;
964
965 if (frag_len1 < payload_len &&
966 avst->codecpar->codec_type == AVMEDIA_TYPE_AUDIO) {
967 flush_packet(s);
968 continue;
969 }
970 if (asf->packet_timestamp_start > INT64_MAX - UINT16_MAX ||
971 timestamp > asf->packet_timestamp_start + UINT16_MAX) {
972 flush_packet(s);
973 continue;
974 }
975 }
976 if (frag_len1 > 0) {
977 if (payload_len > frag_len1)
978 payload_len = frag_len1;
979 else if (payload_len == (frag_len1 - 1))
980 payload_len = frag_len1 - 2; // additional byte need to put padding length
981
982 put_payload_header(s, stream, timestamp + PREROLL_TIME,
983 m_obj_size, m_obj_offset, payload_len, flags);
984 avio_write(&asf->pb, buf, payload_len);
985
986 if (asf->multi_payloads_present)
987 asf->packet_size_left -= (payload_len + PAYLOAD_HEADER_SIZE_MULTIPLE_PAYLOADS);
988 else
989 asf->packet_size_left -= (payload_len + PAYLOAD_HEADER_SIZE_SINGLE_PAYLOAD);
990 asf->packet_timestamp_end = timestamp;
991
992 asf->packet_nb_payloads++;
993 } else {
994 payload_len = 0;
995 }
996 m_obj_offset += payload_len;
997 buf += payload_len;
998
999 if (!asf->multi_payloads_present)
1000 flush_packet(s);
1001 else if (asf->packet_size_left <= (PAYLOAD_HEADER_SIZE_MULTIPLE_PAYLOADS + PACKET_HEADER_MIN_SIZE + 1))
1002 flush_packet(s);
1003 else if (asf->packet_nb_payloads == ASF_PAYLOADS_PER_PACKET)
1004 flush_packet(s);
1005 }
1006 stream->seq++;
1007}
1008
1009static int update_index(AVFormatContext *s, int start_sec,
1010 uint32_t packet_number, uint16_t packet_count,
1011 uint64_t packet_offset)
1012{
1013 ASFContext *asf = s->priv_data;
1014
1015 if (start_sec > asf->next_start_sec) {
1016 int i;
1017
1018 if (!asf->next_start_sec) {
1019 asf->next_packet_number = packet_number;
1020 asf->next_packet_count = packet_count;
1021 asf->next_packet_offset = packet_offset;
1022 }
1023
1024 if (start_sec > asf->nb_index_memory_alloc) {
1025 int err;
1026 asf->nb_index_memory_alloc = (start_sec + ASF_INDEX_BLOCK) & ~(ASF_INDEX_BLOCK - 1);
1027 if ((err = av_reallocp_array(&asf->index_ptr,
1028 asf->nb_index_memory_alloc,
1029 sizeof(*asf->index_ptr))) < 0) {
1030 asf->nb_index_memory_alloc = 0;
1031 return err;
1032 }
1033 }
1034 for (i = asf->next_start_sec; i < start_sec; i++) {
1035 asf->index_ptr[i].packet_number = asf->next_packet_number;
1036 asf->index_ptr[i].packet_count = asf->next_packet_count;
1037 asf->index_ptr[i].send_time = asf->next_start_sec * INT64_C(10000000);
1038 asf->index_ptr[i].offset = asf->next_packet_offset;
1039
1040 }
1041 }
1042 asf->maximum_packet = FFMAX(asf->maximum_packet, packet_count);
1043 asf->next_packet_number = packet_number;
1044 asf->next_packet_count = packet_count;
1045 asf->next_packet_offset = packet_offset;
1046 asf->next_start_sec = start_sec;
1047
1048 return 0;
1049}
1050
1051static int asf_write_packet(AVFormatContext *s, AVPacket *pkt)
1052{
1053 ASFContext *asf = s->priv_data;
1054 AVIOContext *pb = s->pb;
1055 ASFStream *stream;
1056 AVCodecParameters *par;
1057 uint32_t packet_number;
1058 int64_t pts;
1059 int start_sec;
1060 int flags = pkt->flags;
1061 int ret;
1062 uint64_t offset = avio_tell(pb);
1063
1064 par = s->streams[pkt->stream_index]->codecpar;
1065 stream = &asf->streams[pkt->stream_index];
1066
1067 if (par->codec_type == AVMEDIA_TYPE_AUDIO)
1068 flags &= ~AV_PKT_FLAG_KEY;
1069
1070 pts = (pkt->pts != AV_NOPTS_VALUE) ? pkt->pts : pkt->dts;
1071 av_assert0(pts != AV_NOPTS_VALUE);
1072 if ( pts < - PREROLL_TIME
1073 || pts > (INT_MAX-3)/10000LL * ASF_INDEXED_INTERVAL - PREROLL_TIME) {
1074 av_log(s, AV_LOG_ERROR, "input pts %"PRId64" is invalid\n", pts);
1075 return AVERROR(EINVAL);
1076 }
1077 pts *= 10000;
1078 asf->duration = FFMAX(asf->duration, pts + pkt->duration * 10000);
1079
1080 packet_number = asf->nb_packets;
1081 put_frame(s, stream, s->streams[pkt->stream_index],
1082 pkt->dts, pkt->data, pkt->size, flags);
1083
1084 start_sec = (int)((PREROLL_TIME * 10000 + pts + ASF_INDEXED_INTERVAL - 1)
1085 / ASF_INDEXED_INTERVAL);
1086
1087 /* check index */
1088 if ((!asf->is_streamed) && (flags & AV_PKT_FLAG_KEY)) {
1089 uint16_t packet_count = asf->nb_packets - packet_number;
1090 ret = update_index(s, start_sec, packet_number, packet_count, offset);
1091 if (ret < 0)
1092 return ret;
1093 }
1094 asf->end_sec = start_sec;
1095
1096 return 0;
1097}
1098
1099static int asf_write_index(AVFormatContext *s, const ASFIndex *index,
1100 uint16_t max, uint32_t count)
1101{
1102 AVIOContext *pb = s->pb;
1103 int i;
1104
1105 ff_put_guid(pb, &ff_asf_simple_index_header);
1106 avio_wl64(pb, 24 + 16 + 8 + 4 + 4 + (4 + 2) * count);
1107 ff_put_guid(pb, &ff_asf_my_guid);
1108 avio_wl64(pb, ASF_INDEXED_INTERVAL);
1109 avio_wl32(pb, max);
1110 avio_wl32(pb, count);
1111 for (i = 0; i < count; i++) {
1112 avio_wl32(pb, index[i].packet_number);
1113 avio_wl16(pb, index[i].packet_count);
1114 }
1115
1116 return 0;
1117}
1118
1119static int asf_write_trailer(AVFormatContext *s)
1120{
1121 ASFContext *asf = s->priv_data;
1122 int64_t file_size, data_size;
1123 int ret;
1124
1125 /* flush the current packet */
1126 if (asf->pb.buf_ptr > asf->pb.buffer)
1127 flush_packet(s);
1128
1129 /* write index */
1130 data_size = avio_tell(s->pb);
1131 if (!asf->is_streamed && asf->next_start_sec) {
1132 if ((ret = update_index(s, asf->end_sec + 1, 0, 0, 0)) < 0)
1133 return ret;
1134 asf_write_index(s, asf->index_ptr, asf->maximum_packet, asf->next_start_sec);
1135 }
1136 avio_flush(s->pb);
1137
1138 if (asf->is_streamed || !(s->pb->seekable & AVIO_SEEKABLE_NORMAL)) {
1139 put_chunk(s, 0x4524, 0, 0); /* end of stream */
1140 } else {
1141 /* rewrite an updated header */
1142 file_size = avio_tell(s->pb);
1143 avio_seek(s->pb, 0, SEEK_SET);
1144 asf_write_header1(s, file_size, data_size - asf->data_offset);
1145 }
1146
1147 av_freep(&asf->index_ptr);
1148 return 0;
1149}
1150
1151static const AVOption asf_options[] = {
1152 { "packet_size", "Packet size", offsetof(ASFContext, packet_size), AV_OPT_TYPE_INT, {.i64 = 3200}, PACKET_SIZE_MIN, PACKET_SIZE_MAX, AV_OPT_FLAG_ENCODING_PARAM },
1153 { NULL },
1154};
1155
1156#if CONFIG_ASF_MUXER
1157static const AVClass asf_muxer_class = {
1158 .class_name = "ASF muxer",
1159 .item_name = av_default_item_name,
1160 .option = asf_options,
1161 .version = LIBAVUTIL_VERSION_INT,
1162};
1163
1164AVOutputFormat ff_asf_muxer = {
1165 .name = "asf",
1166 .long_name = NULL_IF_CONFIG_SMALL("ASF (Advanced / Active Streaming Format)"),
1167 .mime_type = "video/x-ms-asf",
1168 .extensions = "asf,wmv,wma",
1169 .priv_data_size = sizeof(ASFContext),
1170 .audio_codec = AV_CODEC_ID_WMAV2,
1171 .video_codec = AV_CODEC_ID_MSMPEG4V3,
1172 .write_header = asf_write_header,
1173 .write_packet = asf_write_packet,
1174 .write_trailer = asf_write_trailer,
1175 .flags = AVFMT_GLOBALHEADER,
1176 .codec_tag = (const AVCodecTag * const []) {
1177 codec_asf_bmp_tags, ff_codec_bmp_tags, ff_codec_wav_tags, 0
1178 },
1179 .priv_class = &asf_muxer_class,
1180};
1181#endif /* CONFIG_ASF_MUXER */
1182
1183#if CONFIG_ASF_STREAM_MUXER
1184static const AVClass asf_stream_muxer_class = {
1185 .class_name = "ASF stream muxer",
1186 .item_name = av_default_item_name,
1187 .option = asf_options,
1188 .version = LIBAVUTIL_VERSION_INT,
1189};
1190
1191AVOutputFormat ff_asf_stream_muxer = {
1192 .name = "asf_stream",
1193 .long_name = NULL_IF_CONFIG_SMALL("ASF (Advanced / Active Streaming Format)"),
1194 .mime_type = "video/x-ms-asf",
1195 .extensions = "asf,wmv,wma",
1196 .priv_data_size = sizeof(ASFContext),
1197 .audio_codec = AV_CODEC_ID_WMAV2,
1198 .video_codec = AV_CODEC_ID_MSMPEG4V3,
1199 .write_header = asf_write_stream_header,
1200 .write_packet = asf_write_packet,
1201 .write_trailer = asf_write_trailer,
1202 .flags = AVFMT_GLOBALHEADER,
1203 .codec_tag = (const AVCodecTag * const []) {
1204 codec_asf_bmp_tags, ff_codec_bmp_tags, ff_codec_wav_tags, 0
1205 },
1206 .priv_class = &asf_stream_muxer_class,
1207};
1208#endif /* CONFIG_ASF_STREAM_MUXER */
1209
generated by cgit at 2024-05-17 03:06:16 (GMT)