3 * Copyright (c) 2000, 2001 Fabrice Bellard
5 * This file is part of Libav.
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.
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.
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
25 #include "avio_internal.h"
26 #include "libavutil/dict.h"
32 #define ASF_INDEXED_INTERVAL 10000000
33 #define ASF_INDEX_BLOCK 600
35 #define ASF_PACKET_ERROR_CORRECTION_DATA_SIZE 0x2
36 #define ASF_PACKET_ERROR_CORRECTION_FLAGS (\
37 ASF_PACKET_FLAG_ERROR_CORRECTION_PRESENT | \
38 ASF_PACKET_ERROR_CORRECTION_DATA_SIZE\
41 #if (ASF_PACKET_ERROR_CORRECTION_FLAGS != 0)
42 # define ASF_PACKET_ERROR_CORRECTION_FLAGS_FIELD_SIZE 1
44 # define ASF_PACKET_ERROR_CORRECTION_FLAGS_FIELD_SIZE 0
47 #define ASF_PPI_PROPERTY_FLAGS (\
48 ASF_PL_FLAG_REPLICATED_DATA_LENGTH_FIELD_IS_BYTE | \
49 ASF_PL_FLAG_OFFSET_INTO_MEDIA_OBJECT_LENGTH_FIELD_IS_DWORD | \
50 ASF_PL_FLAG_MEDIA_OBJECT_NUMBER_LENGTH_FIELD_IS_BYTE | \
51 ASF_PL_FLAG_STREAM_NUMBER_LENGTH_FIELD_IS_BYTE \
54 #define ASF_PPI_LENGTH_TYPE_FLAGS 0
56 #define ASF_PAYLOAD_FLAGS ASF_PL_FLAG_PAYLOAD_LENGTH_FIELD_IS_WORD
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
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
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
67 #ifndef ASF_PPI_SEQUENCE_FIELD_SIZE
68 # define ASF_PPI_SEQUENCE_FIELD_SIZE 0
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
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
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
81 #ifndef ASF_PPI_PACKET_LENGTH_FIELD_SIZE
82 # define ASF_PPI_PACKET_LENGTH_FIELD_SIZE 0
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
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
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
94 #ifndef ASF_PPI_PADDING_LENGTH_FIELD_SIZE
95 # define ASF_PPI_PADDING_LENGTH_FIELD_SIZE 0
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
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
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
107 #ifndef ASF_PAYLOAD_REPLICATED_DATA_LENGTH_FIELD_SIZE
108 # define ASF_PAYLOAD_REPLICATED_DATA_LENGTH_FIELD_SIZE 0
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
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
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
120 #ifndef ASF_PAYLOAD_OFFSET_INTO_MEDIA_OBJECT_FIELD_SIZE
121 # define ASF_PAYLOAD_OFFSET_INTO_MEDIA_OBJECT_FIELD_SIZE 0
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
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
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
133 #ifndef ASF_PAYLOAD_MEDIA_OBJECT_NUMBER_FIELD_SIZE
134 # define ASF_PAYLOAD_MEDIA_OBJECT_NUMBER_FIELD_SIZE 0
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
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
143 #ifndef ASF_PAYLOAD_LENGTH_FIELD_SIZE
144 # define ASF_PAYLOAD_LENGTH_FIELD_SIZE 0
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*/ \
160 // Replicated Data shall be at least 8 bytes long.
161 #define ASF_PAYLOAD_REPLICATED_DATA_LENGTH 0x08
163 #define PAYLOAD_HEADER_SIZE_SINGLE_PAYLOAD (\
164 1 + /*Stream Number*/ \
165 ASF_PAYLOAD_MEDIA_OBJECT_NUMBER_FIELD_SIZE + \
166 ASF_PAYLOAD_OFFSET_INTO_MEDIA_OBJECT_FIELD_SIZE + \
167 ASF_PAYLOAD_REPLICATED_DATA_LENGTH_FIELD_SIZE + \
168 ASF_PAYLOAD_REPLICATED_DATA_LENGTH \
171 #define PAYLOAD_HEADER_SIZE_MULTIPLE_PAYLOADS (\
172 1 + /*Stream Number*/ \
173 ASF_PAYLOAD_MEDIA_OBJECT_NUMBER_FIELD_SIZE + \
174 ASF_PAYLOAD_OFFSET_INTO_MEDIA_OBJECT_FIELD_SIZE + \
175 ASF_PAYLOAD_REPLICATED_DATA_LENGTH_FIELD_SIZE + \
176 ASF_PAYLOAD_REPLICATED_DATA_LENGTH + \
177 ASF_PAYLOAD_LENGTH_FIELD_SIZE \
180 #define SINGLE_PAYLOAD_DATA_LENGTH (\
182 PACKET_HEADER_MIN_SIZE - \
183 PAYLOAD_HEADER_SIZE_SINGLE_PAYLOAD \
186 #define MULTI_PAYLOAD_CONSTANT (\
188 PACKET_HEADER_MIN_SIZE - \
189 1 - /*Payload Flags*/ \
190 2*PAYLOAD_HEADER_SIZE_MULTIPLE_PAYLOADS \
196 ASFStream streams[128]; ///< it's max number and it's not that big
197 /* non streamed additonnal info */
198 uint64_t nb_packets; ///< how many packets are there in the file, invalid if broadcasting
199 int64_t duration; ///< in 100ns units
201 unsigned char multi_payloads_present;
202 int packet_size_left;
203 int packet_timestamp_start;
204 int packet_timestamp_end;
205 unsigned int packet_nb_payloads;
206 uint8_t packet_buf[PACKET_SIZE];
208 /* only for reading */
209 uint64_t data_offset; ///< beginning of the first data packet
211 int64_t last_indexed_pts;
213 uint32_t nb_index_count;
214 uint32_t nb_index_memory_alloc;
215 uint16_t maximum_packet;
218 static const AVCodecTag codec_asf_bmp_tags[] = {
219 { CODEC_ID_MPEG4, MKTAG('M', 'P', '4', 'S') },
220 { CODEC_ID_MPEG4, MKTAG('M', '4', 'S', '2') },
221 { CODEC_ID_MSMPEG4V3, MKTAG('M', 'P', '4', '3') },
222 { CODEC_ID_NONE, 0 },
225 #define PREROLL_TIME 3100
227 static void put_guid(AVIOContext *s, const ff_asf_guid *g)
229 assert(sizeof(*g) == 16);
230 avio_write(s, *g, sizeof(*g));
233 static void put_str16(AVIOContext *s, const char *tag)
237 AVIOContext *dyn_buf;
238 if (avio_open_dyn_buf(&dyn_buf) < 0)
241 avio_put_str16le(dyn_buf, tag);
242 len = avio_close_dyn_buf(dyn_buf, &pb);
244 avio_write(s, pb, len);
248 static int64_t put_header(AVIOContext *pb, const ff_asf_guid *g)
258 /* update header size */
259 static void end_header(AVIOContext *pb, int64_t pos)
263 pos1 = avio_tell(pb);
264 avio_seek(pb, pos + 16, SEEK_SET);
265 avio_wl64(pb, pos1 - pos);
266 avio_seek(pb, pos1, SEEK_SET);
269 /* write an asf chunk (only used in streaming case) */
270 static void put_chunk(AVFormatContext *s, int type, int payload_length, int flags)
272 ASFContext *asf = s->priv_data;
273 AVIOContext *pb = s->pb;
276 length = payload_length + 8;
278 avio_wl16(pb, length); //size
279 avio_wl32(pb, asf->seqno);//sequence number
280 avio_wl16(pb, flags); /* unknown bytes */
281 avio_wl16(pb, length); //size_confirm
285 /* convert from unix to windows time */
286 static int64_t unix_to_file_time(int ti)
290 t = ti * INT64_C(10000000);
291 t += INT64_C(116444736000000000);
295 /* write the header (used two times if non streamed) */
296 static int asf_write_header1(AVFormatContext *s, int64_t file_size, int64_t data_chunk_size)
298 ASFContext *asf = s->priv_data;
299 AVIOContext *pb = s->pb;
300 AVDictionaryEntry *tags[5];
301 int header_size, n, extra_size, extra_size2, wav_extra_size, file_time;
305 int64_t header_offset, cur_pos, hpos;
309 ff_metadata_conv(&s->metadata, ff_asf_metadata_conv, NULL);
311 tags[0] = av_dict_get(s->metadata, "title" , NULL, 0);
312 tags[1] = av_dict_get(s->metadata, "author" , NULL, 0);
313 tags[2] = av_dict_get(s->metadata, "copyright", NULL, 0);
314 tags[3] = av_dict_get(s->metadata, "comment" , NULL, 0);
315 tags[4] = av_dict_get(s->metadata, "rating" , NULL, 0);
317 duration = asf->duration + PREROLL_TIME * 10000;
318 has_title = tags[0] || tags[1] || tags[2] || tags[3] || tags[4];
319 metadata_count = s->metadata ? s->metadata->count : 0;
322 for(n=0;n<s->nb_streams;n++) {
323 enc = s->streams[n]->codec;
325 avpriv_set_pts_info(s->streams[n], 32, 1, 1000); /* 32 bit pts in ms */
327 bit_rate += enc->bit_rate;
330 if (asf->is_streamed) {
331 put_chunk(s, 0x4824, 0, 0xc00); /* start of stream (length will be patched later) */
334 put_guid(pb, &ff_asf_header);
335 avio_wl64(pb, -1); /* header length, will be patched after */
336 avio_wl32(pb, 3 + has_title + !!metadata_count + s->nb_streams); /* number of chunks in header */
337 avio_w8(pb, 1); /* ??? */
338 avio_w8(pb, 2); /* ??? */
341 header_offset = avio_tell(pb);
342 hpos = put_header(pb, &ff_asf_file_header);
343 put_guid(pb, &ff_asf_my_guid);
344 avio_wl64(pb, file_size);
346 avio_wl64(pb, unix_to_file_time(file_time));
347 avio_wl64(pb, asf->nb_packets); /* number of packets */
348 avio_wl64(pb, duration); /* end time stamp (in 100ns units) */
349 avio_wl64(pb, asf->duration); /* duration (in 100ns units) */
350 avio_wl64(pb, PREROLL_TIME); /* start time stamp */
351 avio_wl32(pb, (asf->is_streamed || !pb->seekable ) ? 3 : 2); /* ??? */
352 avio_wl32(pb, s->packet_size); /* packet size */
353 avio_wl32(pb, s->packet_size); /* packet size */
354 avio_wl32(pb, bit_rate); /* Nominal data rate in bps */
355 end_header(pb, hpos);
357 /* unknown headers */
358 hpos = put_header(pb, &ff_asf_head1_guid);
359 put_guid(pb, &ff_asf_head2_guid);
362 end_header(pb, hpos);
364 /* title and other infos */
368 AVIOContext *dyn_buf;
370 if (avio_open_dyn_buf(&dyn_buf) < 0)
371 return AVERROR(ENOMEM);
373 hpos = put_header(pb, &ff_asf_comment_header);
375 for (n = 0; n < FF_ARRAY_ELEMS(tags); n++) {
376 len = tags[n] ? avio_put_str16le(dyn_buf, tags[n]->value) : 0;
379 len = avio_close_dyn_buf(dyn_buf, &buf);
380 avio_write(pb, buf, len);
382 end_header(pb, hpos);
384 if (metadata_count) {
385 AVDictionaryEntry *tag = NULL;
386 hpos = put_header(pb, &ff_asf_extended_content_header);
387 avio_wl16(pb, metadata_count);
388 while ((tag = av_dict_get(s->metadata, "", tag, AV_DICT_IGNORE_SUFFIX))) {
389 put_str16(pb, tag->key);
391 put_str16(pb, tag->value);
393 end_header(pb, hpos);
397 for(n=0;n<s->nb_streams;n++) {
399 // ASFStream *stream = &asf->streams[n];
401 enc = s->streams[n]->codec;
402 asf->streams[n].num = n + 1;
403 asf->streams[n].seq = 0;
406 switch(enc->codec_type) {
407 case AVMEDIA_TYPE_AUDIO:
409 extra_size = 18 + wav_extra_size;
413 case AVMEDIA_TYPE_VIDEO:
414 wav_extra_size = enc->extradata_size;
415 extra_size = 0x33 + wav_extra_size;
420 hpos = put_header(pb, &ff_asf_stream_header);
421 if (enc->codec_type == AVMEDIA_TYPE_AUDIO) {
422 put_guid(pb, &ff_asf_audio_stream);
423 put_guid(pb, &ff_asf_audio_conceal_spread);
425 put_guid(pb, &ff_asf_video_stream);
426 put_guid(pb, &ff_asf_video_conceal_none);
428 avio_wl64(pb, 0); /* ??? */
429 es_pos = avio_tell(pb);
430 avio_wl32(pb, extra_size); /* wav header len */
431 avio_wl32(pb, extra_size2); /* additional data len */
432 avio_wl16(pb, n + 1); /* stream number */
433 avio_wl32(pb, 0); /* ??? */
435 if (enc->codec_type == AVMEDIA_TYPE_AUDIO) {
436 /* WAVEFORMATEX header */
437 int wavsize = ff_put_wav_header(pb, enc);
441 if (wavsize != extra_size) {
442 cur_pos = avio_tell(pb);
443 avio_seek(pb, es_pos, SEEK_SET);
444 avio_wl32(pb, wavsize); /* wav header len */
445 avio_seek(pb, cur_pos, SEEK_SET);
447 /* ERROR Correction */
449 if(enc->codec_id == CODEC_ID_ADPCM_G726 || !enc->block_align){
450 avio_wl16(pb, 0x0190);
451 avio_wl16(pb, 0x0190);
453 avio_wl16(pb, enc->block_align);
454 avio_wl16(pb, enc->block_align);
459 avio_wl32(pb, enc->width);
460 avio_wl32(pb, enc->height);
461 avio_w8(pb, 2); /* ??? */
462 avio_wl16(pb, 40 + enc->extradata_size); /* size */
464 /* BITMAPINFOHEADER header */
465 ff_put_bmp_header(pb, enc, ff_codec_bmp_tags, 1);
467 end_header(pb, hpos);
472 hpos = put_header(pb, &ff_asf_codec_comment_header);
473 put_guid(pb, &ff_asf_codec_comment1_header);
474 avio_wl32(pb, s->nb_streams);
475 for(n=0;n<s->nb_streams;n++) {
480 AVIOContext *dyn_buf;
482 enc = s->streams[n]->codec;
483 p = avcodec_find_encoder(enc->codec_id);
485 if(enc->codec_type == AVMEDIA_TYPE_AUDIO)
487 else if(enc->codec_type == AVMEDIA_TYPE_VIDEO)
492 if(enc->codec_id == CODEC_ID_WMAV2)
493 desc = "Windows Media Audio V8";
495 desc = p ? p->name : enc->codec_name;
497 if ( avio_open_dyn_buf(&dyn_buf) < 0)
498 return AVERROR(ENOMEM);
500 avio_put_str16le(dyn_buf, desc);
501 len = avio_close_dyn_buf(dyn_buf, &buf);
502 avio_wl16(pb, len / 2); // "number of characters" = length in bytes / 2
504 avio_write(pb, buf, len);
507 avio_wl16(pb, 0); /* no parameters */
511 if (enc->codec_type == AVMEDIA_TYPE_AUDIO) {
513 avio_wl16(pb, enc->codec_tag);
516 avio_wl32(pb, enc->codec_tag);
521 end_header(pb, hpos);
523 /* patch the header size fields */
525 cur_pos = avio_tell(pb);
526 header_size = cur_pos - header_offset;
527 if (asf->is_streamed) {
528 header_size += 8 + 30 + 50;
530 avio_seek(pb, header_offset - 10 - 30, SEEK_SET);
531 avio_wl16(pb, header_size);
532 avio_seek(pb, header_offset - 2 - 30, SEEK_SET);
533 avio_wl16(pb, header_size);
535 header_size -= 8 + 30 + 50;
537 header_size += 24 + 6;
538 avio_seek(pb, header_offset - 14, SEEK_SET);
539 avio_wl64(pb, header_size);
540 avio_seek(pb, cur_pos, SEEK_SET);
542 /* movie chunk, followed by packets of packet_size */
543 asf->data_offset = cur_pos;
544 put_guid(pb, &ff_asf_data_header);
545 avio_wl64(pb, data_chunk_size);
546 put_guid(pb, &ff_asf_my_guid);
547 avio_wl64(pb, asf->nb_packets); /* nb packets */
548 avio_w8(pb, 1); /* ??? */
549 avio_w8(pb, 1); /* ??? */
553 static int asf_write_header(AVFormatContext *s)
555 ASFContext *asf = s->priv_data;
557 s->packet_size = PACKET_SIZE;
560 asf->last_indexed_pts = 0;
561 asf->index_ptr = av_malloc( sizeof(ASFIndex) * ASF_INDEX_BLOCK );
562 asf->nb_index_memory_alloc = ASF_INDEX_BLOCK;
563 asf->nb_index_count = 0;
564 asf->maximum_packet = 0;
566 /* the data-chunk-size has to be 50, which is data_size - asf->data_offset
567 * at the moment this function is done. It is needed to use asf as
568 * streamable format. */
569 if (asf_write_header1(s, 0, 50) < 0) {
576 asf->packet_nb_payloads = 0;
577 asf->packet_timestamp_start = -1;
578 asf->packet_timestamp_end = -1;
579 ffio_init_context(&asf->pb, asf->packet_buf, s->packet_size, 1,
580 NULL, NULL, NULL, NULL);
585 static int asf_write_stream_header(AVFormatContext *s)
587 ASFContext *asf = s->priv_data;
589 asf->is_streamed = 1;
591 return asf_write_header(s);
594 static int put_payload_parsing_info(
596 unsigned int sendtime,
597 unsigned int duration,
602 ASFContext *asf = s->priv_data;
603 AVIOContext *pb = s->pb;
605 int64_t start= avio_tell(pb);
607 int iLengthTypeFlags = ASF_PPI_LENGTH_TYPE_FLAGS;
609 padsize -= PACKET_HEADER_MIN_SIZE;
610 if(asf->multi_payloads_present)
614 avio_w8(pb, ASF_PACKET_ERROR_CORRECTION_FLAGS);
615 for (i = 0; i < ASF_PACKET_ERROR_CORRECTION_DATA_SIZE; i++){
619 if (asf->multi_payloads_present)
620 iLengthTypeFlags |= ASF_PPI_FLAG_MULTIPLE_PAYLOADS_PRESENT;
624 iLengthTypeFlags |= ASF_PPI_FLAG_PADDING_LENGTH_FIELD_IS_BYTE;
626 iLengthTypeFlags |= ASF_PPI_FLAG_PADDING_LENGTH_FIELD_IS_WORD;
628 avio_w8(pb, iLengthTypeFlags);
630 avio_w8(pb, ASF_PPI_PROPERTY_FLAGS);
632 if (iLengthTypeFlags & ASF_PPI_FLAG_PADDING_LENGTH_FIELD_IS_WORD)
633 avio_wl16(pb, padsize - 2);
634 if (iLengthTypeFlags & ASF_PPI_FLAG_PADDING_LENGTH_FIELD_IS_BYTE)
635 avio_w8(pb, padsize - 1);
637 avio_wl32(pb, sendtime);
638 avio_wl16(pb, duration);
639 if (asf->multi_payloads_present)
640 avio_w8(pb, nb_payloads | ASF_PAYLOAD_FLAGS);
642 ppi_size = avio_tell(pb) - start;
647 static void flush_packet(AVFormatContext *s)
649 ASFContext *asf = s->priv_data;
650 int packet_hdr_size, packet_filled_size;
652 assert(asf->packet_timestamp_end >= asf->packet_timestamp_start);
654 if (asf->is_streamed) {
655 put_chunk(s, 0x4424, s->packet_size, 0);
658 packet_hdr_size = put_payload_parsing_info(
660 asf->packet_timestamp_start,
661 asf->packet_timestamp_end - asf->packet_timestamp_start,
662 asf->packet_nb_payloads,
663 asf->packet_size_left
666 packet_filled_size = PACKET_SIZE - asf->packet_size_left;
667 assert(packet_hdr_size <= asf->packet_size_left);
668 memset(asf->packet_buf + packet_filled_size, 0, asf->packet_size_left);
670 avio_write(s->pb, asf->packet_buf, s->packet_size - packet_hdr_size);
674 asf->packet_nb_payloads = 0;
675 asf->packet_timestamp_start = -1;
676 asf->packet_timestamp_end = -1;
677 ffio_init_context(&asf->pb, asf->packet_buf, s->packet_size, 1,
678 NULL, NULL, NULL, NULL);
681 static void put_payload_header(
684 int presentation_time,
691 ASFContext *asf = s->priv_data;
692 AVIOContext *pb = &asf->pb;
696 if (flags & AV_PKT_FLAG_KEY)
697 val |= ASF_PL_FLAG_KEY_FRAME;
700 avio_w8(pb, stream->seq); //Media object number
701 avio_wl32(pb, m_obj_offset); //Offset Into Media Object
703 // Replicated Data shall be at least 8 bytes long.
704 // The first 4 bytes of data shall contain the
705 // Size of the Media Object that the payload belongs to.
706 // The next 4 bytes of data shall contain the
707 // Presentation Time for the media object that the payload belongs to.
708 avio_w8(pb, ASF_PAYLOAD_REPLICATED_DATA_LENGTH);
710 avio_wl32(pb, m_obj_size); //Replicated Data - Media Object Size
711 avio_wl32(pb, presentation_time);//Replicated Data - Presentation Time
713 if (asf->multi_payloads_present){
714 avio_wl16(pb, payload_len); //payload length
718 static void put_frame(
728 ASFContext *asf = s->priv_data;
729 int m_obj_offset, payload_len, frag_len1;
732 while (m_obj_offset < m_obj_size) {
733 payload_len = m_obj_size - m_obj_offset;
734 if (asf->packet_timestamp_start == -1) {
735 asf->multi_payloads_present = (payload_len < MULTI_PAYLOAD_CONSTANT);
737 asf->packet_size_left = PACKET_SIZE;
738 if (asf->multi_payloads_present){
739 frag_len1 = MULTI_PAYLOAD_CONSTANT - 1;
742 frag_len1 = SINGLE_PAYLOAD_DATA_LENGTH;
744 asf->packet_timestamp_start = timestamp;
748 frag_len1 = asf->packet_size_left - PAYLOAD_HEADER_SIZE_MULTIPLE_PAYLOADS - PACKET_HEADER_MIN_SIZE - 1;
750 if(frag_len1 < payload_len && avst->codec->codec_type == AVMEDIA_TYPE_AUDIO){
756 if (payload_len > frag_len1)
757 payload_len = frag_len1;
758 else if (payload_len == (frag_len1 - 1))
759 payload_len = frag_len1 - 2; //additional byte need to put padding length
761 put_payload_header(s, stream, timestamp+PREROLL_TIME, m_obj_size, m_obj_offset, payload_len, flags);
762 avio_write(&asf->pb, buf, payload_len);
764 if (asf->multi_payloads_present)
765 asf->packet_size_left -= (payload_len + PAYLOAD_HEADER_SIZE_MULTIPLE_PAYLOADS);
767 asf->packet_size_left -= (payload_len + PAYLOAD_HEADER_SIZE_SINGLE_PAYLOAD);
768 asf->packet_timestamp_end = timestamp;
770 asf->packet_nb_payloads++;
774 m_obj_offset += payload_len;
777 if (!asf->multi_payloads_present)
779 else if (asf->packet_size_left <= (PAYLOAD_HEADER_SIZE_MULTIPLE_PAYLOADS + PACKET_HEADER_MIN_SIZE + 1))
785 static int asf_write_packet(AVFormatContext *s, AVPacket *pkt)
787 ASFContext *asf = s->priv_data;
790 AVCodecContext *codec;
791 int64_t packet_st,pts;
793 int flags= pkt->flags;
795 codec = s->streams[pkt->stream_index]->codec;
796 stream = &asf->streams[pkt->stream_index];
798 if(codec->codec_type == AVMEDIA_TYPE_AUDIO)
799 flags &= ~AV_PKT_FLAG_KEY;
801 pts = (pkt->pts != AV_NOPTS_VALUE) ? pkt->pts : pkt->dts;
802 assert(pts != AV_NOPTS_VALUE);
803 duration = pts * 10000;
804 asf->duration= FFMAX(asf->duration, duration + pkt->duration * 10000);
806 packet_st = asf->nb_packets;
807 put_frame(s, stream, s->streams[pkt->stream_index], pkt->dts, pkt->data, pkt->size, flags);
810 if ((!asf->is_streamed) && (flags & AV_PKT_FLAG_KEY)) {
811 start_sec = (int)(duration / INT64_C(10000000));
812 if (start_sec != (int)(asf->last_indexed_pts / INT64_C(10000000))) {
813 for(i=asf->nb_index_count;i<start_sec;i++) {
814 if (i>=asf->nb_index_memory_alloc) {
815 asf->nb_index_memory_alloc += ASF_INDEX_BLOCK;
816 asf->index_ptr = (ASFIndex*)av_realloc( asf->index_ptr, sizeof(ASFIndex) * asf->nb_index_memory_alloc );
819 asf->index_ptr[i].packet_number = (uint32_t)packet_st;
820 asf->index_ptr[i].packet_count = (uint16_t)(asf->nb_packets-packet_st);
821 asf->maximum_packet = FFMAX(asf->maximum_packet, (uint16_t)(asf->nb_packets-packet_st));
823 asf->nb_index_count = start_sec;
824 asf->last_indexed_pts = duration;
831 static int asf_write_index(AVFormatContext *s, ASFIndex *index, uint16_t max, uint32_t count)
833 AVIOContext *pb = s->pb;
836 put_guid(pb, &ff_asf_simple_index_header);
837 avio_wl64(pb, 24 + 16 + 8 + 4 + 4 + (4 + 2)*count);
838 put_guid(pb, &ff_asf_my_guid);
839 avio_wl64(pb, ASF_INDEXED_INTERVAL);
841 avio_wl32(pb, count);
842 for(i=0; i<count; i++) {
843 avio_wl32(pb, index[i].packet_number);
844 avio_wl16(pb, index[i].packet_count);
850 static int asf_write_trailer(AVFormatContext *s)
852 ASFContext *asf = s->priv_data;
853 int64_t file_size,data_size;
855 /* flush the current packet */
856 if (asf->pb.buf_ptr > asf->pb.buffer)
860 data_size = avio_tell(s->pb);
861 if ((!asf->is_streamed) && (asf->nb_index_count != 0)) {
862 asf_write_index(s, asf->index_ptr, asf->maximum_packet, asf->nb_index_count);
866 if (asf->is_streamed || !s->pb->seekable) {
867 put_chunk(s, 0x4524, 0, 0); /* end of stream */
869 /* rewrite an updated header */
870 file_size = avio_tell(s->pb);
871 avio_seek(s->pb, 0, SEEK_SET);
872 asf_write_header1(s, file_size, data_size - asf->data_offset);
876 av_free(asf->index_ptr);
881 AVOutputFormat ff_asf_muxer = {
883 .long_name = NULL_IF_CONFIG_SMALL("ASF format"),
884 .mime_type = "video/x-ms-asf",
885 .extensions = "asf,wmv,wma",
886 .priv_data_size = sizeof(ASFContext),
887 #if CONFIG_LIBMP3LAME
888 .audio_codec = CODEC_ID_MP3,
890 .audio_codec = CODEC_ID_MP2,
892 .video_codec = CODEC_ID_MSMPEG4V3,
893 .write_header = asf_write_header,
894 .write_packet = asf_write_packet,
895 .write_trailer = asf_write_trailer,
896 .flags = AVFMT_GLOBALHEADER,
897 .codec_tag = (const AVCodecTag* const []){
898 codec_asf_bmp_tags, ff_codec_bmp_tags, ff_codec_wav_tags, 0
903 #if CONFIG_ASF_STREAM_MUXER
904 AVOutputFormat ff_asf_stream_muxer = {
905 .name = "asf_stream",
906 .long_name = NULL_IF_CONFIG_SMALL("ASF format"),
907 .mime_type = "video/x-ms-asf",
908 .extensions = "asf,wmv,wma",
909 .priv_data_size = sizeof(ASFContext),
910 #if CONFIG_LIBMP3LAME
911 .audio_codec = CODEC_ID_MP3,
913 .audio_codec = CODEC_ID_MP2,
915 .video_codec = CODEC_ID_MSMPEG4V3,
916 .write_header = asf_write_stream_header,
917 .write_packet = asf_write_packet,
918 .write_trailer = asf_write_trailer,
919 .flags = AVFMT_GLOBALHEADER,
920 .codec_tag = (const AVCodecTag* const []){
921 codec_asf_bmp_tags, ff_codec_bmp_tags, ff_codec_wav_tags, 0
924 #endif //CONFIG_ASF_STREAM_MUXER