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
22 #include "libavutil/avassert.h"
23 #include "libavutil/dict.h"
24 #include "libavutil/mathematics.h"
26 #include "avio_internal.h"
31 #define ASF_INDEXED_INTERVAL 10000000
32 #define ASF_INDEX_BLOCK (1<<9)
33 #define ASF_PAYLOADS_PER_PACKET 63
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)
40 #if (ASF_PACKET_ERROR_CORRECTION_FLAGS != 0)
41 # define ASF_PACKET_ERROR_CORRECTION_FLAGS_FIELD_SIZE 1
43 # define ASF_PACKET_ERROR_CORRECTION_FLAGS_FIELD_SIZE 0
46 #define ASF_PPI_PROPERTY_FLAGS \
47 (ASF_PL_FLAG_REPLICATED_DATA_LENGTH_FIELD_IS_BYTE | \
48 ASF_PL_FLAG_OFFSET_INTO_MEDIA_OBJECT_LENGTH_FIELD_IS_DWORD | \
49 ASF_PL_FLAG_MEDIA_OBJECT_NUMBER_LENGTH_FIELD_IS_BYTE | \
50 ASF_PL_FLAG_STREAM_NUMBER_LENGTH_FIELD_IS_BYTE)
52 #define ASF_PPI_LENGTH_TYPE_FLAGS 0
54 #define ASF_PAYLOAD_FLAGS ASF_PL_FLAG_PAYLOAD_LENGTH_FIELD_IS_WORD
56 #if (ASF_PPI_FLAG_SEQUENCE_FIELD_IS_BYTE == (ASF_PPI_LENGTH_TYPE_FLAGS & ASF_PPI_MASK_SEQUENCE_FIELD_SIZE))
57 # define ASF_PPI_SEQUENCE_FIELD_SIZE 1
59 #if (ASF_PPI_FLAG_SEQUENCE_FIELD_IS_WORD == (ASF_PPI_LENGTH_TYPE_FLAGS & ASF_PPI_MASK_SEQUENCE_FIELD_SIZE))
60 # define ASF_PPI_SEQUENCE_FIELD_SIZE 2
62 #if (ASF_PPI_FLAG_SEQUENCE_FIELD_IS_DWORD == (ASF_PPI_LENGTH_TYPE_FLAGS & ASF_PPI_MASK_SEQUENCE_FIELD_SIZE))
63 # define ASF_PPI_SEQUENCE_FIELD_SIZE 4
65 #ifndef ASF_PPI_SEQUENCE_FIELD_SIZE
66 # define ASF_PPI_SEQUENCE_FIELD_SIZE 0
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
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
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
78 #ifndef ASF_PPI_PACKET_LENGTH_FIELD_SIZE
79 # define ASF_PPI_PACKET_LENGTH_FIELD_SIZE 0
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
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
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
91 #ifndef ASF_PPI_PADDING_LENGTH_FIELD_SIZE
92 # define ASF_PPI_PADDING_LENGTH_FIELD_SIZE 0
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
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
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
104 #ifndef ASF_PAYLOAD_REPLICATED_DATA_LENGTH_FIELD_SIZE
105 # define ASF_PAYLOAD_REPLICATED_DATA_LENGTH_FIELD_SIZE 0
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
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
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
117 #ifndef ASF_PAYLOAD_OFFSET_INTO_MEDIA_OBJECT_FIELD_SIZE
118 # define ASF_PAYLOAD_OFFSET_INTO_MEDIA_OBJECT_FIELD_SIZE 0
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
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
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
130 #ifndef ASF_PAYLOAD_MEDIA_OBJECT_NUMBER_FIELD_SIZE
131 # define ASF_PAYLOAD_MEDIA_OBJECT_NUMBER_FIELD_SIZE 0
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
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
140 #ifndef ASF_PAYLOAD_LENGTH_FIELD_SIZE
141 # define ASF_PAYLOAD_LENGTH_FIELD_SIZE 0
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 */
155 // Replicated Data shall be at least 8 bytes long.
156 #define ASF_PAYLOAD_REPLICATED_DATA_LENGTH 0x08
158 #define PAYLOAD_HEADER_SIZE_SINGLE_PAYLOAD \
159 (1 + /* Stream Number */ \
160 ASF_PAYLOAD_MEDIA_OBJECT_NUMBER_FIELD_SIZE + \
161 ASF_PAYLOAD_OFFSET_INTO_MEDIA_OBJECT_FIELD_SIZE + \
162 ASF_PAYLOAD_REPLICATED_DATA_LENGTH_FIELD_SIZE + \
163 ASF_PAYLOAD_REPLICATED_DATA_LENGTH)
165 #define PAYLOAD_HEADER_SIZE_MULTIPLE_PAYLOADS \
166 (1 + /* Stream Number */ \
167 ASF_PAYLOAD_MEDIA_OBJECT_NUMBER_FIELD_SIZE + \
168 ASF_PAYLOAD_OFFSET_INTO_MEDIA_OBJECT_FIELD_SIZE + \
169 ASF_PAYLOAD_REPLICATED_DATA_LENGTH_FIELD_SIZE + \
170 ASF_PAYLOAD_REPLICATED_DATA_LENGTH + \
171 ASF_PAYLOAD_LENGTH_FIELD_SIZE)
173 #define SINGLE_PAYLOAD_DATA_LENGTH \
175 PACKET_HEADER_MIN_SIZE - \
176 PAYLOAD_HEADER_SIZE_SINGLE_PAYLOAD)
178 #define MULTI_PAYLOAD_CONSTANT \
180 PACKET_HEADER_MIN_SIZE - \
181 1 - /* Payload Flags */ \
182 2 * PAYLOAD_HEADER_SIZE_MULTIPLE_PAYLOADS)
184 #define DATA_HEADER_SIZE 50
186 typedef struct ASFPayload {
191 typedef struct ASFStream {
194 /* use for reading */
203 int ds_span; /* descrambling */
209 uint16_t stream_language_index;
212 uint32_t palette[256];
215 ASFPayload payload[8];
218 typedef struct ASFContext {
221 ASFStream streams[128]; ///< it's max number and it's not that big
222 /* non streamed additonnal info */
223 uint64_t nb_packets; ///< how many packets are there in the file, invalid if broadcasting
224 int64_t duration; ///< in 100ns units
226 unsigned char multi_payloads_present;
227 int packet_size_left;
228 int64_t packet_timestamp_start;
229 int64_t packet_timestamp_end;
230 unsigned int packet_nb_payloads;
231 uint8_t packet_buf[PACKET_SIZE];
233 /* only for reading */
234 uint64_t data_offset; ///< beginning of the first data packet
237 uint32_t nb_index_memory_alloc;
238 uint16_t maximum_packet;
239 uint32_t next_packet_number;
240 uint16_t next_packet_count;
241 uint64_t next_packet_offset;
246 static const AVCodecTag codec_asf_bmp_tags[] = {
247 { AV_CODEC_ID_MPEG4, MKTAG('M', '4', 'S', '2') },
248 { AV_CODEC_ID_MPEG4, MKTAG('M', 'P', '4', 'S') },
249 { AV_CODEC_ID_MSMPEG4V3, MKTAG('M', 'P', '4', '3') },
250 { AV_CODEC_ID_NONE, 0 },
253 #define PREROLL_TIME 3100
255 static void put_str16(AVIOContext *s, const char *tag)
259 AVIOContext *dyn_buf;
260 if (avio_open_dyn_buf(&dyn_buf) < 0)
263 avio_put_str16le(dyn_buf, tag);
264 len = avio_close_dyn_buf(dyn_buf, &pb);
266 avio_write(s, pb, len);
270 static int64_t put_header(AVIOContext *pb, const ff_asf_guid *g)
280 /* update header size */
281 static void end_header(AVIOContext *pb, int64_t pos)
285 pos1 = avio_tell(pb);
286 avio_seek(pb, pos + 16, SEEK_SET);
287 avio_wl64(pb, pos1 - pos);
288 avio_seek(pb, pos1, SEEK_SET);
291 /* write an asf chunk (only used in streaming case) */
292 static void put_chunk(AVFormatContext *s, int type,
293 int payload_length, int flags)
295 ASFContext *asf = s->priv_data;
296 AVIOContext *pb = s->pb;
299 length = payload_length + 8;
301 avio_wl16(pb, length); // size
302 avio_wl32(pb, asf->seqno); // sequence number
303 avio_wl16(pb, flags); // unknown bytes
304 avio_wl16(pb, length); // size_confirm
308 /* convert from unix to windows time */
309 static int64_t unix_to_file_time(int ti)
313 t = ti * INT64_C(10000000);
314 t += INT64_C(116444736000000000);
318 static int32_t get_send_time(ASFContext *asf, int64_t pres_time, uint64_t *offset)
321 int32_t send_time = 0;
322 *offset = asf->data_offset + DATA_HEADER_SIZE;
323 for (i = 0; i < asf->next_start_sec; i++) {
324 if (pres_time <= asf->index_ptr[i].send_time)
326 send_time = asf->index_ptr[i].send_time;
327 *offset = asf->index_ptr[i].offset;
330 return send_time / 10000;
333 static int asf_write_markers(AVFormatContext *s)
335 ASFContext *asf = s->priv_data;
336 AVIOContext *pb = s->pb;
338 AVRational scale = {1, 10000000};
339 int64_t hpos = put_header(pb, &ff_asf_marker_header);
341 ff_put_guid(pb, &ff_asf_reserved_4);// ASF spec mandates this reserved value
342 avio_wl32(pb, s->nb_chapters); // markers count
343 avio_wl16(pb, 0); // ASF spec mandates 0 for this
344 avio_wl16(pb, 0); // name length 0, no name given
346 for (i = 0; i < s->nb_chapters; i++) {
347 AVChapter *c = s->chapters[i];
348 AVDictionaryEntry *t = av_dict_get(c->metadata, "title", NULL, 0);
349 int64_t pres_time = av_rescale_q(c->start, c->time_base, scale);
351 int32_t send_time = get_send_time(asf, pres_time, &offset);
354 AVIOContext *dyn_buf;
356 if (avio_open_dyn_buf(&dyn_buf) < 0)
357 return AVERROR(ENOMEM);
358 avio_put_str16le(dyn_buf, t->value);
359 len = avio_close_dyn_buf(dyn_buf, &buf);
361 avio_wl64(pb, offset); // offset of the packet with send_time
362 avio_wl64(pb, pres_time + PREROLL_TIME * 10000); // presentation time
363 avio_wl16(pb, 12 + len); // entry length
364 avio_wl32(pb, send_time); // send time
365 avio_wl32(pb, 0); // flags, should be 0
366 avio_wl32(pb, len / 2); // marker desc length in WCHARS!
368 avio_write(pb, buf, len); // marker desc
372 end_header(pb, hpos);
376 /* write the header (used two times if non streamed) */
377 static int asf_write_header1(AVFormatContext *s, int64_t file_size,
378 int64_t data_chunk_size)
380 ASFContext *asf = s->priv_data;
381 AVIOContext *pb = s->pb;
382 AVDictionaryEntry *tags[5];
383 int header_size, n, extra_size, extra_size2, wav_extra_size, file_time;
384 int has_title, has_aspect_ratio = 0;
387 int64_t header_offset, cur_pos, hpos;
391 ff_metadata_conv(&s->metadata, ff_asf_metadata_conv, NULL);
393 tags[0] = av_dict_get(s->metadata, "title", NULL, 0);
394 tags[1] = av_dict_get(s->metadata, "author", NULL, 0);
395 tags[2] = av_dict_get(s->metadata, "copyright", NULL, 0);
396 tags[3] = av_dict_get(s->metadata, "comment", NULL, 0);
397 tags[4] = av_dict_get(s->metadata, "rating", NULL, 0);
399 duration = asf->duration + PREROLL_TIME * 10000;
400 has_title = tags[0] || tags[1] || tags[2] || tags[3] || tags[4];
401 metadata_count = av_dict_count(s->metadata);
404 for (n = 0; n < s->nb_streams; n++) {
405 enc = s->streams[n]->codec;
407 avpriv_set_pts_info(s->streams[n], 32, 1, 1000); /* 32 bit pts in ms */
409 bit_rate += enc->bit_rate;
410 if ( enc->codec_type == AVMEDIA_TYPE_VIDEO
411 && enc->sample_aspect_ratio.num > 0
412 && enc->sample_aspect_ratio.den > 0)
416 if (asf->is_streamed) {
417 put_chunk(s, 0x4824, 0, 0xc00); /* start of stream (length will be patched later) */
420 ff_put_guid(pb, &ff_asf_header);
421 avio_wl64(pb, -1); /* header length, will be patched after */
422 avio_wl32(pb, 3 + has_title + !!metadata_count + s->nb_streams); /* number of chunks in header */
423 avio_w8(pb, 1); /* ??? */
424 avio_w8(pb, 2); /* ??? */
427 header_offset = avio_tell(pb);
428 hpos = put_header(pb, &ff_asf_file_header);
429 ff_put_guid(pb, &ff_asf_my_guid);
430 avio_wl64(pb, file_size);
432 avio_wl64(pb, unix_to_file_time(file_time));
433 avio_wl64(pb, asf->nb_packets); /* number of packets */
434 avio_wl64(pb, duration); /* end time stamp (in 100ns units) */
435 avio_wl64(pb, asf->duration); /* duration (in 100ns units) */
436 avio_wl64(pb, PREROLL_TIME); /* start time stamp */
437 avio_wl32(pb, (asf->is_streamed || !pb->seekable) ? 3 : 2); /* ??? */
438 avio_wl32(pb, s->packet_size); /* packet size */
439 avio_wl32(pb, s->packet_size); /* packet size */
440 avio_wl32(pb, bit_rate ? bit_rate : -1); /* Maximum data rate in bps */
441 end_header(pb, hpos);
443 /* unknown headers */
444 hpos = put_header(pb, &ff_asf_head1_guid);
445 ff_put_guid(pb, &ff_asf_head2_guid);
447 if (has_aspect_ratio) {
449 avio_wl32(pb, 26 + has_aspect_ratio * 84);
450 hpos2 = put_header(pb, &ff_asf_metadata_header);
451 avio_wl16(pb, 2 * has_aspect_ratio);
452 for (n = 0; n < s->nb_streams; n++) {
453 enc = s->streams[n]->codec;
454 if ( enc->codec_type == AVMEDIA_TYPE_VIDEO
455 && enc->sample_aspect_ratio.num > 0
456 && enc->sample_aspect_ratio.den > 0) {
457 AVRational sar = enc->sample_aspect_ratio;
459 // the stream number is set like this below
460 avio_wl16(pb, n + 1);
461 avio_wl16(pb, 26); // name_len
462 avio_wl16(pb, 3); // value_type
463 avio_wl32(pb, 4); // value_len
464 avio_put_str16le(pb, "AspectRatioX");
465 avio_wl32(pb, sar.num);
467 // the stream number is set like this below
468 avio_wl16(pb, n + 1);
469 avio_wl16(pb, 26); // name_len
470 avio_wl16(pb, 3); // value_type
471 avio_wl32(pb, 4); // value_len
472 avio_put_str16le(pb, "AspectRatioY");
473 avio_wl32(pb, sar.den);
476 end_header(pb, hpos2);
480 end_header(pb, hpos);
482 /* title and other infos */
486 AVIOContext *dyn_buf;
488 if (avio_open_dyn_buf(&dyn_buf) < 0)
489 return AVERROR(ENOMEM);
491 hpos = put_header(pb, &ff_asf_comment_header);
493 for (n = 0; n < FF_ARRAY_ELEMS(tags); n++) {
494 len = tags[n] ? avio_put_str16le(dyn_buf, tags[n]->value) : 0;
497 len = avio_close_dyn_buf(dyn_buf, &buf);
498 avio_write(pb, buf, len);
500 end_header(pb, hpos);
502 if (metadata_count) {
503 AVDictionaryEntry *tag = NULL;
504 hpos = put_header(pb, &ff_asf_extended_content_header);
505 avio_wl16(pb, metadata_count);
506 while ((tag = av_dict_get(s->metadata, "", tag, AV_DICT_IGNORE_SUFFIX))) {
507 put_str16(pb, tag->key);
509 put_str16(pb, tag->value);
511 end_header(pb, hpos);
513 /* chapters using ASF markers */
514 if (!asf->is_streamed && s->nb_chapters) {
516 if ((ret = asf_write_markers(s)) < 0)
520 for (n = 0; n < s->nb_streams; n++) {
522 // ASFStream *stream = &asf->streams[n];
524 enc = s->streams[n]->codec;
525 asf->streams[n].num = n + 1;
526 asf->streams[n].seq = 1;
528 switch (enc->codec_type) {
529 case AVMEDIA_TYPE_AUDIO:
531 extra_size = 18 + wav_extra_size;
535 case AVMEDIA_TYPE_VIDEO:
536 wav_extra_size = enc->extradata_size;
537 extra_size = 0x33 + wav_extra_size;
542 hpos = put_header(pb, &ff_asf_stream_header);
543 if (enc->codec_type == AVMEDIA_TYPE_AUDIO) {
544 ff_put_guid(pb, &ff_asf_audio_stream);
545 ff_put_guid(pb, &ff_asf_audio_conceal_spread);
547 ff_put_guid(pb, &ff_asf_video_stream);
548 ff_put_guid(pb, &ff_asf_video_conceal_none);
550 avio_wl64(pb, 0); /* ??? */
551 es_pos = avio_tell(pb);
552 avio_wl32(pb, extra_size); /* wav header len */
553 avio_wl32(pb, extra_size2); /* additional data len */
554 avio_wl16(pb, n + 1); /* stream number */
555 avio_wl32(pb, 0); /* ??? */
557 if (enc->codec_type == AVMEDIA_TYPE_AUDIO) {
558 /* WAVEFORMATEX header */
559 int wavsize = ff_put_wav_header(pb, enc, FF_PUT_WAV_HEADER_FORCE_WAVEFORMATEX);
563 if (wavsize != extra_size) {
564 cur_pos = avio_tell(pb);
565 avio_seek(pb, es_pos, SEEK_SET);
566 avio_wl32(pb, wavsize); /* wav header len */
567 avio_seek(pb, cur_pos, SEEK_SET);
569 /* ERROR Correction */
571 if (enc->codec_id == AV_CODEC_ID_ADPCM_G726 || !enc->block_align) {
572 avio_wl16(pb, 0x0190);
573 avio_wl16(pb, 0x0190);
575 avio_wl16(pb, enc->block_align);
576 avio_wl16(pb, enc->block_align);
581 avio_wl32(pb, enc->width);
582 avio_wl32(pb, enc->height);
583 avio_w8(pb, 2); /* ??? */
584 avio_wl16(pb, 40 + enc->extradata_size); /* size */
586 /* BITMAPINFOHEADER header */
587 ff_put_bmp_header(pb, enc, ff_codec_bmp_tags, 1, 0);
589 end_header(pb, hpos);
594 hpos = put_header(pb, &ff_asf_codec_comment_header);
595 ff_put_guid(pb, &ff_asf_codec_comment1_header);
596 avio_wl32(pb, s->nb_streams);
597 for (n = 0; n < s->nb_streams; n++) {
598 const AVCodecDescriptor *codec_desc;
601 enc = s->streams[n]->codec;
602 codec_desc = avcodec_descriptor_get(enc->codec_id);
604 if (enc->codec_type == AVMEDIA_TYPE_AUDIO)
606 else if (enc->codec_type == AVMEDIA_TYPE_VIDEO)
611 if (enc->codec_id == AV_CODEC_ID_WMAV2)
612 desc = "Windows Media Audio V8";
614 desc = codec_desc ? codec_desc->name : NULL;
617 AVIOContext *dyn_buf;
621 if (avio_open_dyn_buf(&dyn_buf) < 0)
622 return AVERROR(ENOMEM);
624 avio_put_str16le(dyn_buf, desc);
625 len = avio_close_dyn_buf(dyn_buf, &buf);
626 avio_wl16(pb, len / 2); // "number of characters" = length in bytes / 2
628 avio_write(pb, buf, len);
633 avio_wl16(pb, 0); /* no parameters */
636 if (enc->codec_type == AVMEDIA_TYPE_AUDIO) {
638 avio_wl16(pb, enc->codec_tag);
641 avio_wl32(pb, enc->codec_tag);
646 end_header(pb, hpos);
648 /* patch the header size fields */
650 cur_pos = avio_tell(pb);
651 header_size = cur_pos - header_offset;
652 if (asf->is_streamed) {
653 header_size += 8 + 30 + DATA_HEADER_SIZE;
655 avio_seek(pb, header_offset - 10 - 30, SEEK_SET);
656 avio_wl16(pb, header_size);
657 avio_seek(pb, header_offset - 2 - 30, SEEK_SET);
658 avio_wl16(pb, header_size);
660 header_size -= 8 + 30 + DATA_HEADER_SIZE;
662 header_size += 24 + 6;
663 avio_seek(pb, header_offset - 14, SEEK_SET);
664 avio_wl64(pb, header_size);
665 avio_seek(pb, cur_pos, SEEK_SET);
667 /* movie chunk, followed by packets of packet_size */
668 asf->data_offset = cur_pos;
669 ff_put_guid(pb, &ff_asf_data_header);
670 avio_wl64(pb, data_chunk_size);
671 ff_put_guid(pb, &ff_asf_my_guid);
672 avio_wl64(pb, asf->nb_packets); /* nb packets */
673 avio_w8(pb, 1); /* ??? */
674 avio_w8(pb, 1); /* ??? */
678 static int asf_write_header(AVFormatContext *s)
680 ASFContext *asf = s->priv_data;
682 s->packet_size = PACKET_SIZE;
683 s->max_interleave_delta = 0;
686 asf->index_ptr = av_malloc(sizeof(ASFIndex) * ASF_INDEX_BLOCK);
688 return AVERROR(ENOMEM);
689 asf->nb_index_memory_alloc = ASF_INDEX_BLOCK;
690 asf->maximum_packet = 0;
692 /* the data-chunk-size has to be 50 (DATA_HEADER_SIZE), which is
693 * data_size - asf->data_offset at the moment this function is done.
694 * It is needed to use asf as a streamable format. */
695 if (asf_write_header1(s, 0, DATA_HEADER_SIZE) < 0) {
697 av_freep(&asf->index_ptr);
703 asf->packet_nb_payloads = 0;
704 asf->packet_timestamp_start = -1;
705 asf->packet_timestamp_end = -1;
706 ffio_init_context(&asf->pb, asf->packet_buf, s->packet_size, 1,
707 NULL, NULL, NULL, NULL);
709 if (s->avoid_negative_ts < 0)
710 s->avoid_negative_ts = 1;
715 static int asf_write_stream_header(AVFormatContext *s)
717 ASFContext *asf = s->priv_data;
719 asf->is_streamed = 1;
721 return asf_write_header(s);
724 static int put_payload_parsing_info(AVFormatContext *s,
725 unsigned sendtime, unsigned duration,
726 int nb_payloads, int padsize)
728 ASFContext *asf = s->priv_data;
729 AVIOContext *pb = s->pb;
731 int64_t start = avio_tell(pb);
733 int iLengthTypeFlags = ASF_PPI_LENGTH_TYPE_FLAGS;
735 padsize -= PACKET_HEADER_MIN_SIZE;
736 if (asf->multi_payloads_present)
738 av_assert0(padsize >= 0);
740 avio_w8(pb, ASF_PACKET_ERROR_CORRECTION_FLAGS);
741 for (i = 0; i < ASF_PACKET_ERROR_CORRECTION_DATA_SIZE; i++)
744 if (asf->multi_payloads_present)
745 iLengthTypeFlags |= ASF_PPI_FLAG_MULTIPLE_PAYLOADS_PRESENT;
749 iLengthTypeFlags |= ASF_PPI_FLAG_PADDING_LENGTH_FIELD_IS_BYTE;
751 iLengthTypeFlags |= ASF_PPI_FLAG_PADDING_LENGTH_FIELD_IS_WORD;
753 avio_w8(pb, iLengthTypeFlags);
755 avio_w8(pb, ASF_PPI_PROPERTY_FLAGS);
757 if (iLengthTypeFlags & ASF_PPI_FLAG_PADDING_LENGTH_FIELD_IS_WORD)
758 avio_wl16(pb, padsize - 2);
759 if (iLengthTypeFlags & ASF_PPI_FLAG_PADDING_LENGTH_FIELD_IS_BYTE)
760 avio_w8(pb, padsize - 1);
762 avio_wl32(pb, sendtime);
763 avio_wl16(pb, duration);
764 if (asf->multi_payloads_present)
765 avio_w8(pb, nb_payloads | ASF_PAYLOAD_FLAGS);
767 ppi_size = avio_tell(pb) - start;
772 static void flush_packet(AVFormatContext *s)
774 ASFContext *asf = s->priv_data;
775 int packet_hdr_size, packet_filled_size;
777 av_assert0(asf->packet_timestamp_end >= asf->packet_timestamp_start);
779 if (asf->is_streamed)
780 put_chunk(s, 0x4424, s->packet_size, 0);
782 packet_hdr_size = put_payload_parsing_info(s,
783 asf->packet_timestamp_start,
784 asf->packet_timestamp_end - asf->packet_timestamp_start,
785 asf->packet_nb_payloads,
786 asf->packet_size_left);
788 packet_filled_size = PACKET_SIZE - asf->packet_size_left;
789 av_assert0(packet_hdr_size <= asf->packet_size_left);
790 memset(asf->packet_buf + packet_filled_size, 0, asf->packet_size_left);
792 avio_write(s->pb, asf->packet_buf, s->packet_size - packet_hdr_size);
796 asf->packet_nb_payloads = 0;
797 asf->packet_timestamp_start = -1;
798 asf->packet_timestamp_end = -1;
799 ffio_init_context(&asf->pb, asf->packet_buf, s->packet_size, 1,
800 NULL, NULL, NULL, NULL);
803 static void put_payload_header(AVFormatContext *s, ASFStream *stream,
804 int64_t presentation_time, int m_obj_size,
805 int m_obj_offset, int payload_len, int flags)
807 ASFContext *asf = s->priv_data;
808 AVIOContext *pb = &asf->pb;
812 if (flags & AV_PKT_FLAG_KEY)
813 val |= ASF_PL_FLAG_KEY_FRAME;
816 avio_w8(pb, stream->seq); // Media object number
817 avio_wl32(pb, m_obj_offset); // Offset Into Media Object
819 // Replicated Data shall be at least 8 bytes long.
820 // The first 4 bytes of data shall contain the
821 // Size of the Media Object that the payload belongs to.
822 // The next 4 bytes of data shall contain the
823 // Presentation Time for the media object that the payload belongs to.
824 avio_w8(pb, ASF_PAYLOAD_REPLICATED_DATA_LENGTH);
826 avio_wl32(pb, m_obj_size); // Replicated Data - Media Object Size
827 avio_wl32(pb, (uint32_t) presentation_time); // Replicated Data - Presentation Time
829 if (asf->multi_payloads_present) {
830 avio_wl16(pb, payload_len); // payload length
834 static void put_frame(AVFormatContext *s, ASFStream *stream, AVStream *avst,
835 int64_t timestamp, const uint8_t *buf,
836 int m_obj_size, int flags)
838 ASFContext *asf = s->priv_data;
839 int m_obj_offset, payload_len, frag_len1;
842 while (m_obj_offset < m_obj_size) {
843 payload_len = m_obj_size - m_obj_offset;
844 if (asf->packet_timestamp_start == -1) {
845 asf->multi_payloads_present = (payload_len < MULTI_PAYLOAD_CONSTANT);
847 asf->packet_size_left = PACKET_SIZE;
848 if (asf->multi_payloads_present) {
849 frag_len1 = MULTI_PAYLOAD_CONSTANT - 1;
851 frag_len1 = SINGLE_PAYLOAD_DATA_LENGTH;
853 asf->packet_timestamp_start = timestamp;
856 frag_len1 = asf->packet_size_left -
857 PAYLOAD_HEADER_SIZE_MULTIPLE_PAYLOADS -
858 PACKET_HEADER_MIN_SIZE - 1;
860 if (frag_len1 < payload_len &&
861 avst->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
867 if (payload_len > frag_len1)
868 payload_len = frag_len1;
869 else if (payload_len == (frag_len1 - 1))
870 payload_len = frag_len1 - 2; // additional byte need to put padding length
872 put_payload_header(s, stream, timestamp + PREROLL_TIME,
873 m_obj_size, m_obj_offset, payload_len, flags);
874 avio_write(&asf->pb, buf, payload_len);
876 if (asf->multi_payloads_present)
877 asf->packet_size_left -= (payload_len + PAYLOAD_HEADER_SIZE_MULTIPLE_PAYLOADS);
879 asf->packet_size_left -= (payload_len + PAYLOAD_HEADER_SIZE_SINGLE_PAYLOAD);
880 asf->packet_timestamp_end = timestamp;
882 asf->packet_nb_payloads++;
886 m_obj_offset += payload_len;
889 if (!asf->multi_payloads_present)
891 else if (asf->packet_size_left <= (PAYLOAD_HEADER_SIZE_MULTIPLE_PAYLOADS + PACKET_HEADER_MIN_SIZE + 1))
893 else if (asf->packet_nb_payloads == ASF_PAYLOADS_PER_PACKET)
899 static int update_index(AVFormatContext *s, int start_sec,
900 uint32_t packet_number, uint16_t packet_count,
901 uint64_t packet_offset)
903 ASFContext *asf = s->priv_data;
905 if (start_sec > asf->next_start_sec) {
908 if (!asf->next_start_sec) {
909 asf->next_packet_number = packet_number;
910 asf->next_packet_count = packet_count;
911 asf->next_packet_offset = packet_offset;
914 if (start_sec > asf->nb_index_memory_alloc) {
916 asf->nb_index_memory_alloc = (start_sec + ASF_INDEX_BLOCK) & ~(ASF_INDEX_BLOCK - 1);
917 if ((err = av_reallocp_array(&asf->index_ptr,
918 asf->nb_index_memory_alloc,
919 sizeof(*asf->index_ptr))) < 0) {
920 asf->nb_index_memory_alloc = 0;
924 for (i = asf->next_start_sec; i < start_sec; i++) {
925 asf->index_ptr[i].packet_number = asf->next_packet_number;
926 asf->index_ptr[i].packet_count = asf->next_packet_count;
927 asf->index_ptr[i].send_time = asf->next_start_sec * INT64_C(10000000);
928 asf->index_ptr[i].offset = asf->next_packet_offset;
932 asf->maximum_packet = FFMAX(asf->maximum_packet, packet_count);
933 asf->next_packet_number = packet_number;
934 asf->next_packet_count = packet_count;
935 asf->next_packet_offset = packet_offset;
936 asf->next_start_sec = start_sec;
941 static int asf_write_packet(AVFormatContext *s, AVPacket *pkt)
943 ASFContext *asf = s->priv_data;
944 AVIOContext *pb = s->pb;
946 AVCodecContext *codec;
947 uint32_t packet_number;
950 int flags = pkt->flags;
952 uint64_t offset = avio_tell(pb);
954 codec = s->streams[pkt->stream_index]->codec;
955 stream = &asf->streams[pkt->stream_index];
957 if (codec->codec_type == AVMEDIA_TYPE_AUDIO)
958 flags &= ~AV_PKT_FLAG_KEY;
960 pts = (pkt->pts != AV_NOPTS_VALUE) ? pkt->pts : pkt->dts;
961 av_assert0(pts != AV_NOPTS_VALUE);
963 asf->duration = FFMAX(asf->duration, pts + pkt->duration * 10000);
965 packet_number = asf->nb_packets;
966 put_frame(s, stream, s->streams[pkt->stream_index],
967 pkt->dts, pkt->data, pkt->size, flags);
969 start_sec = (int)((PREROLL_TIME * 10000 + pts + ASF_INDEXED_INTERVAL - 1)
970 / ASF_INDEXED_INTERVAL);
973 if ((!asf->is_streamed) && (flags & AV_PKT_FLAG_KEY)) {
974 uint16_t packet_count = asf->nb_packets - packet_number;
975 ret = update_index(s, start_sec, packet_number, packet_count, offset);
979 asf->end_sec = start_sec;
984 static int asf_write_index(AVFormatContext *s, const ASFIndex *index,
985 uint16_t max, uint32_t count)
987 AVIOContext *pb = s->pb;
990 ff_put_guid(pb, &ff_asf_simple_index_header);
991 avio_wl64(pb, 24 + 16 + 8 + 4 + 4 + (4 + 2) * count);
992 ff_put_guid(pb, &ff_asf_my_guid);
993 avio_wl64(pb, ASF_INDEXED_INTERVAL);
995 avio_wl32(pb, count);
996 for (i = 0; i < count; i++) {
997 avio_wl32(pb, index[i].packet_number);
998 avio_wl16(pb, index[i].packet_count);
1004 static int asf_write_trailer(AVFormatContext *s)
1006 ASFContext *asf = s->priv_data;
1007 int64_t file_size, data_size;
1010 /* flush the current packet */
1011 if (asf->pb.buf_ptr > asf->pb.buffer)
1015 data_size = avio_tell(s->pb);
1016 if (!asf->is_streamed && asf->next_start_sec) {
1017 if ((ret = update_index(s, asf->end_sec + 1, 0, 0, 0)) < 0)
1019 asf_write_index(s, asf->index_ptr, asf->maximum_packet, asf->next_start_sec);
1023 if (asf->is_streamed || !s->pb->seekable) {
1024 put_chunk(s, 0x4524, 0, 0); /* end of stream */
1026 /* rewrite an updated header */
1027 file_size = avio_tell(s->pb);
1028 avio_seek(s->pb, 0, SEEK_SET);
1029 asf_write_header1(s, file_size, data_size - asf->data_offset);
1032 av_freep(&asf->index_ptr);
1036 #if CONFIG_ASF_MUXER
1037 AVOutputFormat ff_asf_muxer = {
1039 .long_name = NULL_IF_CONFIG_SMALL("ASF (Advanced / Active Streaming Format)"),
1040 .mime_type = "video/x-ms-asf",
1041 .extensions = "asf,wmv,wma",
1042 .priv_data_size = sizeof(ASFContext),
1043 .audio_codec = AV_CODEC_ID_WMAV2,
1044 .video_codec = AV_CODEC_ID_MSMPEG4V3,
1045 .write_header = asf_write_header,
1046 .write_packet = asf_write_packet,
1047 .write_trailer = asf_write_trailer,
1048 .flags = AVFMT_GLOBALHEADER,
1049 .codec_tag = (const AVCodecTag * const []) {
1050 codec_asf_bmp_tags, ff_codec_bmp_tags, ff_codec_wav_tags, 0
1053 #endif /* CONFIG_ASF_MUXER */
1055 #if CONFIG_ASF_STREAM_MUXER
1056 AVOutputFormat ff_asf_stream_muxer = {
1057 .name = "asf_stream",
1058 .long_name = NULL_IF_CONFIG_SMALL("ASF (Advanced / Active Streaming Format)"),
1059 .mime_type = "video/x-ms-asf",
1060 .extensions = "asf,wmv,wma",
1061 .priv_data_size = sizeof(ASFContext),
1062 .audio_codec = AV_CODEC_ID_WMAV2,
1063 .video_codec = AV_CODEC_ID_MSMPEG4V3,
1064 .write_header = asf_write_stream_header,
1065 .write_packet = asf_write_packet,
1066 .write_trailer = asf_write_trailer,
1067 .flags = AVFMT_GLOBALHEADER,
1068 .codec_tag = (const AVCodecTag * const []) {
1069 codec_asf_bmp_tags, ff_codec_bmp_tags, ff_codec_wav_tags, 0
1072 #endif /* CONFIG_ASF_STREAM_MUXER */