3 * Copyright (c) 2000, 2001 Fabrice Bellard
5 * This file is part of FFmpeg.
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.
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.
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
25 #include "avio_internal.h"
26 #include "libavutil/dict.h"
32 #define ASF_INDEXED_INTERVAL 10000000
33 #define ASF_INDEX_BLOCK (1<<9)
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 int64_t packet_timestamp_start;
204 int64_t 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
212 uint32_t nb_index_memory_alloc;
213 uint16_t maximum_packet;
214 uint32_t next_packet_number;
215 uint16_t next_packet_count;
220 static const AVCodecTag codec_asf_bmp_tags[] = {
221 { AV_CODEC_ID_MPEG4, MKTAG('M', '4', 'S', '2') },
222 { AV_CODEC_ID_MPEG4, MKTAG('M', 'P', '4', 'S') },
223 { AV_CODEC_ID_MSMPEG4V3, MKTAG('M', 'P', '4', '3') },
224 { AV_CODEC_ID_NONE, 0 },
227 #define PREROLL_TIME 3100
229 void ff_put_guid(AVIOContext *s, const ff_asf_guid *g)
231 assert(sizeof(*g) == 16);
232 avio_write(s, *g, sizeof(*g));
235 static void put_str16(AVIOContext *s, const char *tag)
239 AVIOContext *dyn_buf;
240 if (avio_open_dyn_buf(&dyn_buf) < 0)
243 avio_put_str16le(dyn_buf, tag);
244 len = avio_close_dyn_buf(dyn_buf, &pb);
246 avio_write(s, pb, len);
250 static int64_t put_header(AVIOContext *pb, const ff_asf_guid *g)
260 /* update header size */
261 static void end_header(AVIOContext *pb, int64_t pos)
265 pos1 = avio_tell(pb);
266 avio_seek(pb, pos + 16, SEEK_SET);
267 avio_wl64(pb, pos1 - pos);
268 avio_seek(pb, pos1, SEEK_SET);
271 /* write an asf chunk (only used in streaming case) */
272 static void put_chunk(AVFormatContext *s, int type, int payload_length, int flags)
274 ASFContext *asf = s->priv_data;
275 AVIOContext *pb = s->pb;
278 length = payload_length + 8;
280 avio_wl16(pb, length); //size
281 avio_wl32(pb, asf->seqno);//sequence number
282 avio_wl16(pb, flags); /* unknown bytes */
283 avio_wl16(pb, length); //size_confirm
287 /* convert from unix to windows time */
288 static int64_t unix_to_file_time(int ti)
292 t = ti * INT64_C(10000000);
293 t += INT64_C(116444736000000000);
297 /* write the header (used two times if non streamed) */
298 static int asf_write_header1(AVFormatContext *s, int64_t file_size, int64_t data_chunk_size)
300 ASFContext *asf = s->priv_data;
301 AVIOContext *pb = s->pb;
302 AVDictionaryEntry *tags[5];
303 int header_size, n, extra_size, extra_size2, wav_extra_size, file_time;
307 int64_t header_offset, cur_pos, hpos;
311 ff_metadata_conv(&s->metadata, ff_asf_metadata_conv, NULL);
313 tags[0] = av_dict_get(s->metadata, "title" , NULL, 0);
314 tags[1] = av_dict_get(s->metadata, "author" , NULL, 0);
315 tags[2] = av_dict_get(s->metadata, "copyright", NULL, 0);
316 tags[3] = av_dict_get(s->metadata, "comment" , NULL, 0);
317 tags[4] = av_dict_get(s->metadata, "rating" , NULL, 0);
319 duration = asf->duration + PREROLL_TIME * 10000;
320 has_title = tags[0] || tags[1] || tags[2] || tags[3] || tags[4];
321 metadata_count = av_dict_count(s->metadata);
324 for(n=0;n<s->nb_streams;n++) {
325 enc = s->streams[n]->codec;
327 avpriv_set_pts_info(s->streams[n], 32, 1, 1000); /* 32 bit pts in ms */
329 bit_rate += enc->bit_rate;
332 if (asf->is_streamed) {
333 put_chunk(s, 0x4824, 0, 0xc00); /* start of stream (length will be patched later) */
336 ff_put_guid(pb, &ff_asf_header);
337 avio_wl64(pb, -1); /* header length, will be patched after */
338 avio_wl32(pb, 3 + has_title + !!metadata_count + s->nb_streams); /* number of chunks in header */
339 avio_w8(pb, 1); /* ??? */
340 avio_w8(pb, 2); /* ??? */
343 header_offset = avio_tell(pb);
344 hpos = put_header(pb, &ff_asf_file_header);
345 ff_put_guid(pb, &ff_asf_my_guid);
346 avio_wl64(pb, file_size);
348 avio_wl64(pb, unix_to_file_time(file_time));
349 avio_wl64(pb, asf->nb_packets); /* number of packets */
350 avio_wl64(pb, duration); /* end time stamp (in 100ns units) */
351 avio_wl64(pb, asf->duration); /* duration (in 100ns units) */
352 avio_wl64(pb, PREROLL_TIME); /* start time stamp */
353 avio_wl32(pb, (asf->is_streamed || !pb->seekable ) ? 3 : 2); /* ??? */
354 avio_wl32(pb, s->packet_size); /* packet size */
355 avio_wl32(pb, s->packet_size); /* packet size */
356 avio_wl32(pb, bit_rate); /* Nominal data rate in bps */
357 end_header(pb, hpos);
359 /* unknown headers */
360 hpos = put_header(pb, &ff_asf_head1_guid);
361 ff_put_guid(pb, &ff_asf_head2_guid);
364 end_header(pb, hpos);
366 /* title and other infos */
370 AVIOContext *dyn_buf;
372 if (avio_open_dyn_buf(&dyn_buf) < 0)
373 return AVERROR(ENOMEM);
375 hpos = put_header(pb, &ff_asf_comment_header);
377 for (n = 0; n < FF_ARRAY_ELEMS(tags); n++) {
378 len = tags[n] ? avio_put_str16le(dyn_buf, tags[n]->value) : 0;
381 len = avio_close_dyn_buf(dyn_buf, &buf);
382 avio_write(pb, buf, len);
384 end_header(pb, hpos);
386 if (metadata_count) {
387 AVDictionaryEntry *tag = NULL;
388 hpos = put_header(pb, &ff_asf_extended_content_header);
389 avio_wl16(pb, metadata_count);
390 while ((tag = av_dict_get(s->metadata, "", tag, AV_DICT_IGNORE_SUFFIX))) {
391 put_str16(pb, tag->key);
393 put_str16(pb, tag->value);
395 end_header(pb, hpos);
399 for(n=0;n<s->nb_streams;n++) {
401 // ASFStream *stream = &asf->streams[n];
403 enc = s->streams[n]->codec;
404 asf->streams[n].num = n + 1;
405 asf->streams[n].seq = 1;
408 switch(enc->codec_type) {
409 case AVMEDIA_TYPE_AUDIO:
411 extra_size = 18 + wav_extra_size;
415 case AVMEDIA_TYPE_VIDEO:
416 wav_extra_size = enc->extradata_size;
417 extra_size = 0x33 + wav_extra_size;
422 hpos = put_header(pb, &ff_asf_stream_header);
423 if (enc->codec_type == AVMEDIA_TYPE_AUDIO) {
424 ff_put_guid(pb, &ff_asf_audio_stream);
425 ff_put_guid(pb, &ff_asf_audio_conceal_spread);
427 ff_put_guid(pb, &ff_asf_video_stream);
428 ff_put_guid(pb, &ff_asf_video_conceal_none);
430 avio_wl64(pb, 0); /* ??? */
431 es_pos = avio_tell(pb);
432 avio_wl32(pb, extra_size); /* wav header len */
433 avio_wl32(pb, extra_size2); /* additional data len */
434 avio_wl16(pb, n + 1); /* stream number */
435 avio_wl32(pb, 0); /* ??? */
437 if (enc->codec_type == AVMEDIA_TYPE_AUDIO) {
438 /* WAVEFORMATEX header */
439 int wavsize = ff_put_wav_header(pb, enc);
443 if (wavsize != extra_size) {
444 cur_pos = avio_tell(pb);
445 avio_seek(pb, es_pos, SEEK_SET);
446 avio_wl32(pb, wavsize); /* wav header len */
447 avio_seek(pb, cur_pos, SEEK_SET);
449 /* ERROR Correction */
451 if(enc->codec_id == AV_CODEC_ID_ADPCM_G726 || !enc->block_align){
452 avio_wl16(pb, 0x0190);
453 avio_wl16(pb, 0x0190);
455 avio_wl16(pb, enc->block_align);
456 avio_wl16(pb, enc->block_align);
461 avio_wl32(pb, enc->width);
462 avio_wl32(pb, enc->height);
463 avio_w8(pb, 2); /* ??? */
464 avio_wl16(pb, 40 + enc->extradata_size); /* size */
466 /* BITMAPINFOHEADER header */
467 ff_put_bmp_header(pb, enc, ff_codec_bmp_tags, 1);
469 end_header(pb, hpos);
474 hpos = put_header(pb, &ff_asf_codec_comment_header);
475 ff_put_guid(pb, &ff_asf_codec_comment1_header);
476 avio_wl32(pb, s->nb_streams);
477 for(n=0;n<s->nb_streams;n++) {
482 AVIOContext *dyn_buf;
484 enc = s->streams[n]->codec;
485 p = avcodec_find_encoder(enc->codec_id);
487 if(enc->codec_type == AVMEDIA_TYPE_AUDIO)
489 else if(enc->codec_type == AVMEDIA_TYPE_VIDEO)
494 if(enc->codec_id == AV_CODEC_ID_WMAV2)
495 desc = "Windows Media Audio V8";
497 desc = p ? p->name : enc->codec_name;
499 if ( avio_open_dyn_buf(&dyn_buf) < 0)
500 return AVERROR(ENOMEM);
502 avio_put_str16le(dyn_buf, desc);
503 len = avio_close_dyn_buf(dyn_buf, &buf);
504 avio_wl16(pb, len / 2); // "number of characters" = length in bytes / 2
506 avio_write(pb, buf, len);
509 avio_wl16(pb, 0); /* no parameters */
513 if (enc->codec_type == AVMEDIA_TYPE_AUDIO) {
515 avio_wl16(pb, enc->codec_tag);
518 avio_wl32(pb, enc->codec_tag);
523 end_header(pb, hpos);
525 /* patch the header size fields */
527 cur_pos = avio_tell(pb);
528 header_size = cur_pos - header_offset;
529 if (asf->is_streamed) {
530 header_size += 8 + 30 + 50;
532 avio_seek(pb, header_offset - 10 - 30, SEEK_SET);
533 avio_wl16(pb, header_size);
534 avio_seek(pb, header_offset - 2 - 30, SEEK_SET);
535 avio_wl16(pb, header_size);
537 header_size -= 8 + 30 + 50;
539 header_size += 24 + 6;
540 avio_seek(pb, header_offset - 14, SEEK_SET);
541 avio_wl64(pb, header_size);
542 avio_seek(pb, cur_pos, SEEK_SET);
544 /* movie chunk, followed by packets of packet_size */
545 asf->data_offset = cur_pos;
546 ff_put_guid(pb, &ff_asf_data_header);
547 avio_wl64(pb, data_chunk_size);
548 ff_put_guid(pb, &ff_asf_my_guid);
549 avio_wl64(pb, asf->nb_packets); /* nb packets */
550 avio_w8(pb, 1); /* ??? */
551 avio_w8(pb, 1); /* ??? */
555 static int asf_write_header(AVFormatContext *s)
557 ASFContext *asf = s->priv_data;
559 s->packet_size = PACKET_SIZE;
562 asf->index_ptr = av_malloc( sizeof(ASFIndex) * ASF_INDEX_BLOCK );
563 asf->nb_index_memory_alloc = ASF_INDEX_BLOCK;
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);
582 if (s->avoid_negative_ts < 0)
583 s->avoid_negative_ts = 1;
588 static int asf_write_stream_header(AVFormatContext *s)
590 ASFContext *asf = s->priv_data;
592 asf->is_streamed = 1;
594 return asf_write_header(s);
597 static int put_payload_parsing_info(
599 unsigned int sendtime,
600 unsigned int duration,
605 ASFContext *asf = s->priv_data;
606 AVIOContext *pb = s->pb;
608 int64_t start= avio_tell(pb);
610 int iLengthTypeFlags = ASF_PPI_LENGTH_TYPE_FLAGS;
612 padsize -= PACKET_HEADER_MIN_SIZE;
613 if(asf->multi_payloads_present)
617 avio_w8(pb, ASF_PACKET_ERROR_CORRECTION_FLAGS);
618 for (i = 0; i < ASF_PACKET_ERROR_CORRECTION_DATA_SIZE; i++){
622 if (asf->multi_payloads_present)
623 iLengthTypeFlags |= ASF_PPI_FLAG_MULTIPLE_PAYLOADS_PRESENT;
627 iLengthTypeFlags |= ASF_PPI_FLAG_PADDING_LENGTH_FIELD_IS_BYTE;
629 iLengthTypeFlags |= ASF_PPI_FLAG_PADDING_LENGTH_FIELD_IS_WORD;
631 avio_w8(pb, iLengthTypeFlags);
633 avio_w8(pb, ASF_PPI_PROPERTY_FLAGS);
635 if (iLengthTypeFlags & ASF_PPI_FLAG_PADDING_LENGTH_FIELD_IS_WORD)
636 avio_wl16(pb, padsize - 2);
637 if (iLengthTypeFlags & ASF_PPI_FLAG_PADDING_LENGTH_FIELD_IS_BYTE)
638 avio_w8(pb, padsize - 1);
640 avio_wl32(pb, sendtime);
641 avio_wl16(pb, duration);
642 if (asf->multi_payloads_present)
643 avio_w8(pb, nb_payloads | ASF_PAYLOAD_FLAGS);
645 ppi_size = avio_tell(pb) - start;
650 static void flush_packet(AVFormatContext *s)
652 ASFContext *asf = s->priv_data;
653 int packet_hdr_size, packet_filled_size;
655 assert(asf->packet_timestamp_end >= asf->packet_timestamp_start);
657 if (asf->is_streamed) {
658 put_chunk(s, 0x4424, s->packet_size, 0);
661 packet_hdr_size = put_payload_parsing_info(
663 asf->packet_timestamp_start,
664 asf->packet_timestamp_end - asf->packet_timestamp_start,
665 asf->packet_nb_payloads,
666 asf->packet_size_left
669 packet_filled_size = PACKET_SIZE - asf->packet_size_left;
670 assert(packet_hdr_size <= asf->packet_size_left);
671 memset(asf->packet_buf + packet_filled_size, 0, asf->packet_size_left);
673 avio_write(s->pb, asf->packet_buf, s->packet_size - packet_hdr_size);
677 asf->packet_nb_payloads = 0;
678 asf->packet_timestamp_start = -1;
679 asf->packet_timestamp_end = -1;
680 ffio_init_context(&asf->pb, asf->packet_buf, s->packet_size, 1,
681 NULL, NULL, NULL, NULL);
684 static void put_payload_header(
687 int64_t presentation_time,
694 ASFContext *asf = s->priv_data;
695 AVIOContext *pb = &asf->pb;
699 if (flags & AV_PKT_FLAG_KEY)
700 val |= ASF_PL_FLAG_KEY_FRAME;
703 avio_w8(pb, stream->seq); //Media object number
704 avio_wl32(pb, m_obj_offset); //Offset Into Media Object
706 // Replicated Data shall be at least 8 bytes long.
707 // The first 4 bytes of data shall contain the
708 // Size of the Media Object that the payload belongs to.
709 // The next 4 bytes of data shall contain the
710 // Presentation Time for the media object that the payload belongs to.
711 avio_w8(pb, ASF_PAYLOAD_REPLICATED_DATA_LENGTH);
713 avio_wl32(pb, m_obj_size); //Replicated Data - Media Object Size
714 avio_wl32(pb, (uint32_t) presentation_time);//Replicated Data - Presentation Time
716 if (asf->multi_payloads_present){
717 avio_wl16(pb, payload_len); //payload length
721 static void put_frame(
731 ASFContext *asf = s->priv_data;
732 int m_obj_offset, payload_len, frag_len1;
735 while (m_obj_offset < m_obj_size) {
736 payload_len = m_obj_size - m_obj_offset;
737 if (asf->packet_timestamp_start == -1) {
738 asf->multi_payloads_present = (payload_len < MULTI_PAYLOAD_CONSTANT);
740 asf->packet_size_left = PACKET_SIZE;
741 if (asf->multi_payloads_present){
742 frag_len1 = MULTI_PAYLOAD_CONSTANT - 1;
745 frag_len1 = SINGLE_PAYLOAD_DATA_LENGTH;
747 asf->packet_timestamp_start = timestamp;
751 frag_len1 = asf->packet_size_left - PAYLOAD_HEADER_SIZE_MULTIPLE_PAYLOADS - PACKET_HEADER_MIN_SIZE - 1;
753 if(frag_len1 < payload_len && avst->codec->codec_type == AVMEDIA_TYPE_AUDIO){
759 if (payload_len > frag_len1)
760 payload_len = frag_len1;
761 else if (payload_len == (frag_len1 - 1))
762 payload_len = frag_len1 - 2; //additional byte need to put padding length
764 put_payload_header(s, stream, timestamp+PREROLL_TIME, m_obj_size, m_obj_offset, payload_len, flags);
765 avio_write(&asf->pb, buf, payload_len);
767 if (asf->multi_payloads_present)
768 asf->packet_size_left -= (payload_len + PAYLOAD_HEADER_SIZE_MULTIPLE_PAYLOADS);
770 asf->packet_size_left -= (payload_len + PAYLOAD_HEADER_SIZE_SINGLE_PAYLOAD);
771 asf->packet_timestamp_end = timestamp;
773 asf->packet_nb_payloads++;
777 m_obj_offset += payload_len;
780 if (!asf->multi_payloads_present)
782 else if (asf->packet_size_left <= (PAYLOAD_HEADER_SIZE_MULTIPLE_PAYLOADS + PACKET_HEADER_MIN_SIZE + 1))
788 static void update_index(AVFormatContext *s, int start_sec,
789 uint32_t packet_number, uint16_t packet_count)
791 ASFContext *asf = s->priv_data;
793 if (start_sec > asf->next_start_sec) {
796 if (!asf->next_start_sec) {
797 asf->next_packet_number = packet_number;
798 asf->next_packet_count = packet_count;
801 if (start_sec > asf->nb_index_memory_alloc) {
802 asf->nb_index_memory_alloc = (start_sec + ASF_INDEX_BLOCK) & ~(ASF_INDEX_BLOCK - 1);
803 asf->index_ptr = av_realloc( asf->index_ptr, sizeof(ASFIndex) * asf->nb_index_memory_alloc );
805 for (i = asf->next_start_sec; i < start_sec; i++) {
806 asf->index_ptr[i].packet_number = asf->next_packet_number;
807 asf->index_ptr[i].packet_count = asf->next_packet_count;
810 asf->maximum_packet = FFMAX(asf->maximum_packet, packet_count);
811 asf->next_packet_number = packet_number;
812 asf->next_packet_count = packet_count;
813 asf->next_start_sec = start_sec;
816 static int asf_write_packet(AVFormatContext *s, AVPacket *pkt)
818 ASFContext *asf = s->priv_data;
820 AVCodecContext *codec;
821 uint32_t packet_number;
824 int flags= pkt->flags;
826 codec = s->streams[pkt->stream_index]->codec;
827 stream = &asf->streams[pkt->stream_index];
829 if(codec->codec_type == AVMEDIA_TYPE_AUDIO)
830 flags &= ~AV_PKT_FLAG_KEY;
832 pts = (pkt->pts != AV_NOPTS_VALUE) ? pkt->pts : pkt->dts;
833 assert(pts != AV_NOPTS_VALUE);
835 asf->duration= FFMAX(asf->duration, pts + pkt->duration * 10000);
837 packet_number = asf->nb_packets;
838 put_frame(s, stream, s->streams[pkt->stream_index], pkt->dts, pkt->data, pkt->size, flags);
840 start_sec = (int)((PREROLL_TIME * 10000 + pts + ASF_INDEXED_INTERVAL - 1)
841 / ASF_INDEXED_INTERVAL);
844 if ((!asf->is_streamed) && (flags & AV_PKT_FLAG_KEY)) {
845 uint16_t packet_count = asf->nb_packets - packet_number;
846 update_index(s, start_sec, packet_number, packet_count);
848 asf->end_sec = start_sec;
854 static int asf_write_index(AVFormatContext *s, ASFIndex *index, uint16_t max, uint32_t count)
856 AVIOContext *pb = s->pb;
859 ff_put_guid(pb, &ff_asf_simple_index_header);
860 avio_wl64(pb, 24 + 16 + 8 + 4 + 4 + (4 + 2)*count);
861 ff_put_guid(pb, &ff_asf_my_guid);
862 avio_wl64(pb, ASF_INDEXED_INTERVAL);
864 avio_wl32(pb, count);
865 for(i=0; i<count; i++) {
866 avio_wl32(pb, index[i].packet_number);
867 avio_wl16(pb, index[i].packet_count);
873 static int asf_write_trailer(AVFormatContext *s)
875 ASFContext *asf = s->priv_data;
876 int64_t file_size,data_size;
878 /* flush the current packet */
879 if (asf->pb.buf_ptr > asf->pb.buffer)
883 data_size = avio_tell(s->pb);
884 if (!asf->is_streamed && asf->next_start_sec) {
885 update_index(s, asf->end_sec + 1, 0, 0);
886 asf_write_index(s, asf->index_ptr, asf->maximum_packet, asf->next_start_sec);
890 if (asf->is_streamed || !s->pb->seekable) {
891 put_chunk(s, 0x4524, 0, 0); /* end of stream */
893 /* rewrite an updated header */
894 file_size = avio_tell(s->pb);
895 avio_seek(s->pb, 0, SEEK_SET);
896 asf_write_header1(s, file_size, data_size - asf->data_offset);
899 av_free(asf->index_ptr);
904 AVOutputFormat ff_asf_muxer = {
906 .long_name = NULL_IF_CONFIG_SMALL("ASF (Advanced / Active Streaming Format)"),
907 .mime_type = "video/x-ms-asf",
908 .extensions = "asf,wmv,wma",
909 .priv_data_size = sizeof(ASFContext),
910 .audio_codec = AV_CODEC_ID_WMAV2,
911 .video_codec = AV_CODEC_ID_MSMPEG4V3,
912 .write_header = asf_write_header,
913 .write_packet = asf_write_packet,
914 .write_trailer = asf_write_trailer,
915 .flags = AVFMT_GLOBALHEADER,
916 .codec_tag = (const AVCodecTag* const []){
917 codec_asf_bmp_tags, ff_codec_bmp_tags, ff_codec_wav_tags, 0
922 #if CONFIG_ASF_STREAM_MUXER
923 AVOutputFormat ff_asf_stream_muxer = {
924 .name = "asf_stream",
925 .long_name = NULL_IF_CONFIG_SMALL("ASF (Advanced / Active Streaming Format)"),
926 .mime_type = "video/x-ms-asf",
927 .extensions = "asf,wmv,wma",
928 .priv_data_size = sizeof(ASFContext),
929 .audio_codec = AV_CODEC_ID_WMAV2,
930 .video_codec = AV_CODEC_ID_MSMPEG4V3,
931 .write_header = asf_write_stream_header,
932 .write_packet = asf_write_packet,
933 .write_trailer = asf_write_trailer,
934 .flags = AVFMT_GLOBALHEADER,
935 .codec_tag = (const AVCodecTag* const []){
936 codec_asf_bmp_tags, ff_codec_bmp_tags, ff_codec_wav_tags, 0
939 #endif //CONFIG_ASF_STREAM_MUXER