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 ASFContext {
189 ASFStream streams[128]; ///< it's max number and it's not that big
190 /* non streamed additonnal info */
191 uint64_t nb_packets; ///< how many packets are there in the file, invalid if broadcasting
192 int64_t duration; ///< in 100ns units
194 unsigned char multi_payloads_present;
195 int packet_size_left;
196 int64_t packet_timestamp_start;
197 int64_t packet_timestamp_end;
198 unsigned int packet_nb_payloads;
199 uint8_t packet_buf[PACKET_SIZE];
201 /* only for reading */
202 uint64_t data_offset; ///< beginning of the first data packet
205 uint32_t nb_index_memory_alloc;
206 uint16_t maximum_packet;
207 uint32_t next_packet_number;
208 uint16_t next_packet_count;
209 uint64_t next_packet_offset;
214 static const AVCodecTag codec_asf_bmp_tags[] = {
215 { AV_CODEC_ID_MPEG4, MKTAG('M', '4', 'S', '2') },
216 { AV_CODEC_ID_MPEG4, MKTAG('M', 'P', '4', 'S') },
217 { AV_CODEC_ID_MSMPEG4V3, MKTAG('M', 'P', '4', '3') },
218 { AV_CODEC_ID_NONE, 0 },
221 #define PREROLL_TIME 3100
223 static void put_str16(AVIOContext *s, const char *tag)
227 AVIOContext *dyn_buf;
228 if (avio_open_dyn_buf(&dyn_buf) < 0)
231 avio_put_str16le(dyn_buf, tag);
232 len = avio_close_dyn_buf(dyn_buf, &pb);
234 avio_write(s, pb, len);
238 static int64_t put_header(AVIOContext *pb, const ff_asf_guid *g)
248 /* update header size */
249 static void end_header(AVIOContext *pb, int64_t pos)
253 pos1 = avio_tell(pb);
254 avio_seek(pb, pos + 16, SEEK_SET);
255 avio_wl64(pb, pos1 - pos);
256 avio_seek(pb, pos1, SEEK_SET);
259 /* write an asf chunk (only used in streaming case) */
260 static void put_chunk(AVFormatContext *s, int type,
261 int payload_length, int flags)
263 ASFContext *asf = s->priv_data;
264 AVIOContext *pb = s->pb;
267 length = payload_length + 8;
269 avio_wl16(pb, length); // size
270 avio_wl32(pb, asf->seqno); // sequence number
271 avio_wl16(pb, flags); // unknown bytes
272 avio_wl16(pb, length); // size_confirm
276 /* convert from unix to windows time */
277 static int64_t unix_to_file_time(int ti)
281 t = ti * INT64_C(10000000);
282 t += INT64_C(116444736000000000);
286 static int32_t get_send_time(ASFContext *asf, int64_t pres_time, uint64_t *offset)
289 int32_t send_time = 0;
290 *offset = asf->data_offset + DATA_HEADER_SIZE;
291 for (i = 0; i < asf->next_start_sec; i++) {
292 if (pres_time <= asf->index_ptr[i].send_time)
294 send_time = asf->index_ptr[i].send_time;
295 *offset = asf->index_ptr[i].offset;
298 return send_time / 10000;
301 static int asf_write_markers(AVFormatContext *s)
303 ASFContext *asf = s->priv_data;
304 AVIOContext *pb = s->pb;
306 AVRational scale = {1, 10000000};
307 int64_t hpos = put_header(pb, &ff_asf_marker_header);
309 ff_put_guid(pb, &ff_asf_reserved_4);// ASF spec mandates this reserved value
310 avio_wl32(pb, s->nb_chapters); // markers count
311 avio_wl16(pb, 0); // ASF spec mandates 0 for this
312 avio_wl16(pb, 0); // name length 0, no name given
314 for (i = 0; i < s->nb_chapters; i++) {
315 AVChapter *c = s->chapters[i];
316 AVDictionaryEntry *t = av_dict_get(c->metadata, "title", NULL, 0);
317 int64_t pres_time = av_rescale_q(c->start, c->time_base, scale);
319 int32_t send_time = get_send_time(asf, pres_time, &offset);
322 AVIOContext *dyn_buf;
324 if (avio_open_dyn_buf(&dyn_buf) < 0)
325 return AVERROR(ENOMEM);
326 avio_put_str16le(dyn_buf, t->value);
327 len = avio_close_dyn_buf(dyn_buf, &buf);
329 avio_wl64(pb, offset); // offset of the packet with send_time
330 avio_wl64(pb, pres_time + PREROLL_TIME * 10000); // presentation time
331 avio_wl16(pb, 12 + len); // entry length
332 avio_wl32(pb, send_time); // send time
333 avio_wl32(pb, 0); // flags, should be 0
334 avio_wl32(pb, len / 2); // marker desc length in WCHARS!
336 avio_write(pb, buf, len); // marker desc
340 end_header(pb, hpos);
344 /* write the header (used two times if non streamed) */
345 static int asf_write_header1(AVFormatContext *s, int64_t file_size,
346 int64_t data_chunk_size)
348 ASFContext *asf = s->priv_data;
349 AVIOContext *pb = s->pb;
350 AVDictionaryEntry *tags[5];
351 int header_size, n, extra_size, extra_size2, wav_extra_size, file_time;
352 int has_title, has_aspect_ratio = 0;
355 int64_t header_offset, cur_pos, hpos;
359 ff_metadata_conv(&s->metadata, ff_asf_metadata_conv, NULL);
361 tags[0] = av_dict_get(s->metadata, "title", NULL, 0);
362 tags[1] = av_dict_get(s->metadata, "author", NULL, 0);
363 tags[2] = av_dict_get(s->metadata, "copyright", NULL, 0);
364 tags[3] = av_dict_get(s->metadata, "comment", NULL, 0);
365 tags[4] = av_dict_get(s->metadata, "rating", NULL, 0);
367 duration = asf->duration + PREROLL_TIME * 10000;
368 has_title = tags[0] || tags[1] || tags[2] || tags[3] || tags[4];
369 metadata_count = av_dict_count(s->metadata);
372 for (n = 0; n < s->nb_streams; n++) {
373 enc = s->streams[n]->codec;
375 avpriv_set_pts_info(s->streams[n], 32, 1, 1000); /* 32 bit pts in ms */
377 bit_rate += enc->bit_rate;
378 if ( enc->codec_type == AVMEDIA_TYPE_VIDEO
379 && enc->sample_aspect_ratio.num > 0
380 && enc->sample_aspect_ratio.den > 0)
384 if (asf->is_streamed) {
385 put_chunk(s, 0x4824, 0, 0xc00); /* start of stream (length will be patched later) */
388 ff_put_guid(pb, &ff_asf_header);
389 avio_wl64(pb, -1); /* header length, will be patched after */
390 avio_wl32(pb, 3 + has_title + !!metadata_count + s->nb_streams); /* number of chunks in header */
391 avio_w8(pb, 1); /* ??? */
392 avio_w8(pb, 2); /* ??? */
395 header_offset = avio_tell(pb);
396 hpos = put_header(pb, &ff_asf_file_header);
397 ff_put_guid(pb, &ff_asf_my_guid);
398 avio_wl64(pb, file_size);
400 avio_wl64(pb, unix_to_file_time(file_time));
401 avio_wl64(pb, asf->nb_packets); /* number of packets */
402 avio_wl64(pb, duration); /* end time stamp (in 100ns units) */
403 avio_wl64(pb, asf->duration); /* duration (in 100ns units) */
404 avio_wl64(pb, PREROLL_TIME); /* start time stamp */
405 avio_wl32(pb, (asf->is_streamed || !pb->seekable) ? 3 : 2); /* ??? */
406 avio_wl32(pb, s->packet_size); /* packet size */
407 avio_wl32(pb, s->packet_size); /* packet size */
408 avio_wl32(pb, bit_rate ? bit_rate : -1); /* Maximum data rate in bps */
409 end_header(pb, hpos);
411 /* unknown headers */
412 hpos = put_header(pb, &ff_asf_head1_guid);
413 ff_put_guid(pb, &ff_asf_head2_guid);
415 if (has_aspect_ratio) {
417 avio_wl32(pb, 26 + has_aspect_ratio * 84);
418 hpos2 = put_header(pb, &ff_asf_metadata_header);
419 avio_wl16(pb, 2 * has_aspect_ratio);
420 for (n = 0; n < s->nb_streams; n++) {
421 enc = s->streams[n]->codec;
422 if ( enc->codec_type == AVMEDIA_TYPE_VIDEO
423 && enc->sample_aspect_ratio.num > 0
424 && enc->sample_aspect_ratio.den > 0) {
425 AVRational sar = enc->sample_aspect_ratio;
427 // the stream number is set like this below
428 avio_wl16(pb, n + 1);
429 avio_wl16(pb, 26); // name_len
430 avio_wl16(pb, 3); // value_type
431 avio_wl32(pb, 4); // value_len
432 avio_put_str16le(pb, "AspectRatioX");
433 avio_wl32(pb, sar.num);
435 // the stream number is set like this below
436 avio_wl16(pb, n + 1);
437 avio_wl16(pb, 26); // name_len
438 avio_wl16(pb, 3); // value_type
439 avio_wl32(pb, 4); // value_len
440 avio_put_str16le(pb, "AspectRatioY");
441 avio_wl32(pb, sar.den);
444 end_header(pb, hpos2);
448 end_header(pb, hpos);
450 /* title and other infos */
454 AVIOContext *dyn_buf;
456 if (avio_open_dyn_buf(&dyn_buf) < 0)
457 return AVERROR(ENOMEM);
459 hpos = put_header(pb, &ff_asf_comment_header);
461 for (n = 0; n < FF_ARRAY_ELEMS(tags); n++) {
462 len = tags[n] ? avio_put_str16le(dyn_buf, tags[n]->value) : 0;
465 len = avio_close_dyn_buf(dyn_buf, &buf);
466 avio_write(pb, buf, len);
468 end_header(pb, hpos);
470 if (metadata_count) {
471 AVDictionaryEntry *tag = NULL;
472 hpos = put_header(pb, &ff_asf_extended_content_header);
473 avio_wl16(pb, metadata_count);
474 while ((tag = av_dict_get(s->metadata, "", tag, AV_DICT_IGNORE_SUFFIX))) {
475 put_str16(pb, tag->key);
477 put_str16(pb, tag->value);
479 end_header(pb, hpos);
481 /* chapters using ASF markers */
482 if (!asf->is_streamed && s->nb_chapters) {
484 if ((ret = asf_write_markers(s)) < 0)
488 for (n = 0; n < s->nb_streams; n++) {
490 // ASFStream *stream = &asf->streams[n];
492 enc = s->streams[n]->codec;
493 asf->streams[n].num = n + 1;
494 asf->streams[n].seq = 1;
496 switch (enc->codec_type) {
497 case AVMEDIA_TYPE_AUDIO:
499 extra_size = 18 + wav_extra_size;
503 case AVMEDIA_TYPE_VIDEO:
504 wav_extra_size = enc->extradata_size;
505 extra_size = 0x33 + wav_extra_size;
510 hpos = put_header(pb, &ff_asf_stream_header);
511 if (enc->codec_type == AVMEDIA_TYPE_AUDIO) {
512 ff_put_guid(pb, &ff_asf_audio_stream);
513 ff_put_guid(pb, &ff_asf_audio_conceal_spread);
515 ff_put_guid(pb, &ff_asf_video_stream);
516 ff_put_guid(pb, &ff_asf_video_conceal_none);
518 avio_wl64(pb, 0); /* ??? */
519 es_pos = avio_tell(pb);
520 avio_wl32(pb, extra_size); /* wav header len */
521 avio_wl32(pb, extra_size2); /* additional data len */
522 avio_wl16(pb, n + 1); /* stream number */
523 avio_wl32(pb, 0); /* ??? */
525 if (enc->codec_type == AVMEDIA_TYPE_AUDIO) {
526 /* WAVEFORMATEX header */
527 int wavsize = ff_put_wav_header(pb, enc, FF_PUT_WAV_HEADER_FORCE_WAVEFORMATEX);
531 if (wavsize != extra_size) {
532 cur_pos = avio_tell(pb);
533 avio_seek(pb, es_pos, SEEK_SET);
534 avio_wl32(pb, wavsize); /* wav header len */
535 avio_seek(pb, cur_pos, SEEK_SET);
537 /* ERROR Correction */
539 if (enc->codec_id == AV_CODEC_ID_ADPCM_G726 || !enc->block_align) {
540 avio_wl16(pb, 0x0190);
541 avio_wl16(pb, 0x0190);
543 avio_wl16(pb, enc->block_align);
544 avio_wl16(pb, enc->block_align);
549 avio_wl32(pb, enc->width);
550 avio_wl32(pb, enc->height);
551 avio_w8(pb, 2); /* ??? */
552 avio_wl16(pb, 40 + enc->extradata_size); /* size */
554 /* BITMAPINFOHEADER header */
555 ff_put_bmp_header(pb, enc, ff_codec_bmp_tags, 1, 0);
557 end_header(pb, hpos);
562 hpos = put_header(pb, &ff_asf_codec_comment_header);
563 ff_put_guid(pb, &ff_asf_codec_comment1_header);
564 avio_wl32(pb, s->nb_streams);
565 for (n = 0; n < s->nb_streams; n++) {
566 const AVCodecDescriptor *codec_desc;
569 enc = s->streams[n]->codec;
570 codec_desc = avcodec_descriptor_get(enc->codec_id);
572 if (enc->codec_type == AVMEDIA_TYPE_AUDIO)
574 else if (enc->codec_type == AVMEDIA_TYPE_VIDEO)
579 if (enc->codec_id == AV_CODEC_ID_WMAV2)
580 desc = "Windows Media Audio V8";
582 desc = codec_desc ? codec_desc->name : NULL;
585 AVIOContext *dyn_buf;
589 if (avio_open_dyn_buf(&dyn_buf) < 0)
590 return AVERROR(ENOMEM);
592 avio_put_str16le(dyn_buf, desc);
593 len = avio_close_dyn_buf(dyn_buf, &buf);
594 avio_wl16(pb, len / 2); // "number of characters" = length in bytes / 2
596 avio_write(pb, buf, len);
601 avio_wl16(pb, 0); /* no parameters */
604 if (enc->codec_type == AVMEDIA_TYPE_AUDIO) {
606 avio_wl16(pb, enc->codec_tag);
609 avio_wl32(pb, enc->codec_tag);
614 end_header(pb, hpos);
616 /* patch the header size fields */
618 cur_pos = avio_tell(pb);
619 header_size = cur_pos - header_offset;
620 if (asf->is_streamed) {
621 header_size += 8 + 30 + DATA_HEADER_SIZE;
623 avio_seek(pb, header_offset - 10 - 30, SEEK_SET);
624 avio_wl16(pb, header_size);
625 avio_seek(pb, header_offset - 2 - 30, SEEK_SET);
626 avio_wl16(pb, header_size);
628 header_size -= 8 + 30 + DATA_HEADER_SIZE;
630 header_size += 24 + 6;
631 avio_seek(pb, header_offset - 14, SEEK_SET);
632 avio_wl64(pb, header_size);
633 avio_seek(pb, cur_pos, SEEK_SET);
635 /* movie chunk, followed by packets of packet_size */
636 asf->data_offset = cur_pos;
637 ff_put_guid(pb, &ff_asf_data_header);
638 avio_wl64(pb, data_chunk_size);
639 ff_put_guid(pb, &ff_asf_my_guid);
640 avio_wl64(pb, asf->nb_packets); /* nb packets */
641 avio_w8(pb, 1); /* ??? */
642 avio_w8(pb, 1); /* ??? */
646 static int asf_write_header(AVFormatContext *s)
648 ASFContext *asf = s->priv_data;
650 s->packet_size = PACKET_SIZE;
651 s->max_interleave_delta = 0;
654 asf->index_ptr = av_malloc(sizeof(ASFIndex) * ASF_INDEX_BLOCK);
656 return AVERROR(ENOMEM);
657 asf->nb_index_memory_alloc = ASF_INDEX_BLOCK;
658 asf->maximum_packet = 0;
660 /* the data-chunk-size has to be 50 (DATA_HEADER_SIZE), which is
661 * data_size - asf->data_offset at the moment this function is done.
662 * It is needed to use asf as a streamable format. */
663 if (asf_write_header1(s, 0, DATA_HEADER_SIZE) < 0) {
665 av_freep(&asf->index_ptr);
671 asf->packet_nb_payloads = 0;
672 asf->packet_timestamp_start = -1;
673 asf->packet_timestamp_end = -1;
674 ffio_init_context(&asf->pb, asf->packet_buf, s->packet_size, 1,
675 NULL, NULL, NULL, NULL);
677 if (s->avoid_negative_ts < 0)
678 s->avoid_negative_ts = 1;
683 static int asf_write_stream_header(AVFormatContext *s)
685 ASFContext *asf = s->priv_data;
687 asf->is_streamed = 1;
689 return asf_write_header(s);
692 static int put_payload_parsing_info(AVFormatContext *s,
693 unsigned sendtime, unsigned duration,
694 int nb_payloads, int padsize)
696 ASFContext *asf = s->priv_data;
697 AVIOContext *pb = s->pb;
699 int64_t start = avio_tell(pb);
701 int iLengthTypeFlags = ASF_PPI_LENGTH_TYPE_FLAGS;
703 padsize -= PACKET_HEADER_MIN_SIZE;
704 if (asf->multi_payloads_present)
706 av_assert0(padsize >= 0);
708 avio_w8(pb, ASF_PACKET_ERROR_CORRECTION_FLAGS);
709 for (i = 0; i < ASF_PACKET_ERROR_CORRECTION_DATA_SIZE; i++)
712 if (asf->multi_payloads_present)
713 iLengthTypeFlags |= ASF_PPI_FLAG_MULTIPLE_PAYLOADS_PRESENT;
717 iLengthTypeFlags |= ASF_PPI_FLAG_PADDING_LENGTH_FIELD_IS_BYTE;
719 iLengthTypeFlags |= ASF_PPI_FLAG_PADDING_LENGTH_FIELD_IS_WORD;
721 avio_w8(pb, iLengthTypeFlags);
723 avio_w8(pb, ASF_PPI_PROPERTY_FLAGS);
725 if (iLengthTypeFlags & ASF_PPI_FLAG_PADDING_LENGTH_FIELD_IS_WORD)
726 avio_wl16(pb, padsize - 2);
727 if (iLengthTypeFlags & ASF_PPI_FLAG_PADDING_LENGTH_FIELD_IS_BYTE)
728 avio_w8(pb, padsize - 1);
730 avio_wl32(pb, sendtime);
731 avio_wl16(pb, duration);
732 if (asf->multi_payloads_present)
733 avio_w8(pb, nb_payloads | ASF_PAYLOAD_FLAGS);
735 ppi_size = avio_tell(pb) - start;
740 static void flush_packet(AVFormatContext *s)
742 ASFContext *asf = s->priv_data;
743 int packet_hdr_size, packet_filled_size;
745 av_assert0(asf->packet_timestamp_end >= asf->packet_timestamp_start);
747 if (asf->is_streamed)
748 put_chunk(s, 0x4424, s->packet_size, 0);
750 packet_hdr_size = put_payload_parsing_info(s,
751 asf->packet_timestamp_start,
752 asf->packet_timestamp_end - asf->packet_timestamp_start,
753 asf->packet_nb_payloads,
754 asf->packet_size_left);
756 packet_filled_size = PACKET_SIZE - asf->packet_size_left;
757 av_assert0(packet_hdr_size <= asf->packet_size_left);
758 memset(asf->packet_buf + packet_filled_size, 0, asf->packet_size_left);
760 avio_write(s->pb, asf->packet_buf, s->packet_size - packet_hdr_size);
764 asf->packet_nb_payloads = 0;
765 asf->packet_timestamp_start = -1;
766 asf->packet_timestamp_end = -1;
767 ffio_init_context(&asf->pb, asf->packet_buf, s->packet_size, 1,
768 NULL, NULL, NULL, NULL);
771 static void put_payload_header(AVFormatContext *s, ASFStream *stream,
772 int64_t presentation_time, int m_obj_size,
773 int m_obj_offset, int payload_len, int flags)
775 ASFContext *asf = s->priv_data;
776 AVIOContext *pb = &asf->pb;
780 if (flags & AV_PKT_FLAG_KEY)
781 val |= ASF_PL_FLAG_KEY_FRAME;
784 avio_w8(pb, stream->seq); // Media object number
785 avio_wl32(pb, m_obj_offset); // Offset Into Media Object
787 // Replicated Data shall be at least 8 bytes long.
788 // The first 4 bytes of data shall contain the
789 // Size of the Media Object that the payload belongs to.
790 // The next 4 bytes of data shall contain the
791 // Presentation Time for the media object that the payload belongs to.
792 avio_w8(pb, ASF_PAYLOAD_REPLICATED_DATA_LENGTH);
794 avio_wl32(pb, m_obj_size); // Replicated Data - Media Object Size
795 avio_wl32(pb, (uint32_t) presentation_time); // Replicated Data - Presentation Time
797 if (asf->multi_payloads_present) {
798 avio_wl16(pb, payload_len); // payload length
802 static void put_frame(AVFormatContext *s, ASFStream *stream, AVStream *avst,
803 int64_t timestamp, const uint8_t *buf,
804 int m_obj_size, int flags)
806 ASFContext *asf = s->priv_data;
807 int m_obj_offset, payload_len, frag_len1;
810 while (m_obj_offset < m_obj_size) {
811 payload_len = m_obj_size - m_obj_offset;
812 if (asf->packet_timestamp_start == -1) {
813 asf->multi_payloads_present = (payload_len < MULTI_PAYLOAD_CONSTANT);
815 asf->packet_size_left = PACKET_SIZE;
816 if (asf->multi_payloads_present) {
817 frag_len1 = MULTI_PAYLOAD_CONSTANT - 1;
819 frag_len1 = SINGLE_PAYLOAD_DATA_LENGTH;
821 asf->packet_timestamp_start = timestamp;
824 frag_len1 = asf->packet_size_left -
825 PAYLOAD_HEADER_SIZE_MULTIPLE_PAYLOADS -
826 PACKET_HEADER_MIN_SIZE - 1;
828 if (frag_len1 < payload_len &&
829 avst->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
835 if (payload_len > frag_len1)
836 payload_len = frag_len1;
837 else if (payload_len == (frag_len1 - 1))
838 payload_len = frag_len1 - 2; // additional byte need to put padding length
840 put_payload_header(s, stream, timestamp + PREROLL_TIME,
841 m_obj_size, m_obj_offset, payload_len, flags);
842 avio_write(&asf->pb, buf, payload_len);
844 if (asf->multi_payloads_present)
845 asf->packet_size_left -= (payload_len + PAYLOAD_HEADER_SIZE_MULTIPLE_PAYLOADS);
847 asf->packet_size_left -= (payload_len + PAYLOAD_HEADER_SIZE_SINGLE_PAYLOAD);
848 asf->packet_timestamp_end = timestamp;
850 asf->packet_nb_payloads++;
854 m_obj_offset += payload_len;
857 if (!asf->multi_payloads_present)
859 else if (asf->packet_size_left <= (PAYLOAD_HEADER_SIZE_MULTIPLE_PAYLOADS + PACKET_HEADER_MIN_SIZE + 1))
861 else if (asf->packet_nb_payloads == ASF_PAYLOADS_PER_PACKET)
867 static int update_index(AVFormatContext *s, int start_sec,
868 uint32_t packet_number, uint16_t packet_count,
869 uint64_t packet_offset)
871 ASFContext *asf = s->priv_data;
873 if (start_sec > asf->next_start_sec) {
876 if (!asf->next_start_sec) {
877 asf->next_packet_number = packet_number;
878 asf->next_packet_count = packet_count;
879 asf->next_packet_offset = packet_offset;
882 if (start_sec > asf->nb_index_memory_alloc) {
884 asf->nb_index_memory_alloc = (start_sec + ASF_INDEX_BLOCK) & ~(ASF_INDEX_BLOCK - 1);
885 if ((err = av_reallocp_array(&asf->index_ptr,
886 asf->nb_index_memory_alloc,
887 sizeof(*asf->index_ptr))) < 0) {
888 asf->nb_index_memory_alloc = 0;
892 for (i = asf->next_start_sec; i < start_sec; i++) {
893 asf->index_ptr[i].packet_number = asf->next_packet_number;
894 asf->index_ptr[i].packet_count = asf->next_packet_count;
895 asf->index_ptr[i].send_time = asf->next_start_sec * INT64_C(10000000);
896 asf->index_ptr[i].offset = asf->next_packet_offset;
900 asf->maximum_packet = FFMAX(asf->maximum_packet, packet_count);
901 asf->next_packet_number = packet_number;
902 asf->next_packet_count = packet_count;
903 asf->next_packet_offset = packet_offset;
904 asf->next_start_sec = start_sec;
909 static int asf_write_packet(AVFormatContext *s, AVPacket *pkt)
911 ASFContext *asf = s->priv_data;
912 AVIOContext *pb = s->pb;
914 AVCodecContext *codec;
915 uint32_t packet_number;
918 int flags = pkt->flags;
920 uint64_t offset = avio_tell(pb);
922 codec = s->streams[pkt->stream_index]->codec;
923 stream = &asf->streams[pkt->stream_index];
925 if (codec->codec_type == AVMEDIA_TYPE_AUDIO)
926 flags &= ~AV_PKT_FLAG_KEY;
928 pts = (pkt->pts != AV_NOPTS_VALUE) ? pkt->pts : pkt->dts;
929 av_assert0(pts != AV_NOPTS_VALUE);
931 asf->duration = FFMAX(asf->duration, pts + pkt->duration * 10000);
933 packet_number = asf->nb_packets;
934 put_frame(s, stream, s->streams[pkt->stream_index],
935 pkt->dts, pkt->data, pkt->size, flags);
937 start_sec = (int)((PREROLL_TIME * 10000 + pts + ASF_INDEXED_INTERVAL - 1)
938 / ASF_INDEXED_INTERVAL);
941 if ((!asf->is_streamed) && (flags & AV_PKT_FLAG_KEY)) {
942 uint16_t packet_count = asf->nb_packets - packet_number;
943 ret = update_index(s, start_sec, packet_number, packet_count, offset);
947 asf->end_sec = start_sec;
952 static int asf_write_index(AVFormatContext *s, const ASFIndex *index,
953 uint16_t max, uint32_t count)
955 AVIOContext *pb = s->pb;
958 ff_put_guid(pb, &ff_asf_simple_index_header);
959 avio_wl64(pb, 24 + 16 + 8 + 4 + 4 + (4 + 2) * count);
960 ff_put_guid(pb, &ff_asf_my_guid);
961 avio_wl64(pb, ASF_INDEXED_INTERVAL);
963 avio_wl32(pb, count);
964 for (i = 0; i < count; i++) {
965 avio_wl32(pb, index[i].packet_number);
966 avio_wl16(pb, index[i].packet_count);
972 static int asf_write_trailer(AVFormatContext *s)
974 ASFContext *asf = s->priv_data;
975 int64_t file_size, data_size;
978 /* flush the current packet */
979 if (asf->pb.buf_ptr > asf->pb.buffer)
983 data_size = avio_tell(s->pb);
984 if (!asf->is_streamed && asf->next_start_sec) {
985 if ((ret = update_index(s, asf->end_sec + 1, 0, 0, 0)) < 0)
987 asf_write_index(s, asf->index_ptr, asf->maximum_packet, asf->next_start_sec);
991 if (asf->is_streamed || !s->pb->seekable) {
992 put_chunk(s, 0x4524, 0, 0); /* end of stream */
994 /* rewrite an updated header */
995 file_size = avio_tell(s->pb);
996 avio_seek(s->pb, 0, SEEK_SET);
997 asf_write_header1(s, file_size, data_size - asf->data_offset);
1000 av_freep(&asf->index_ptr);
1004 #if CONFIG_ASF_MUXER
1005 AVOutputFormat ff_asf_muxer = {
1007 .long_name = NULL_IF_CONFIG_SMALL("ASF (Advanced / Active Streaming Format)"),
1008 .mime_type = "video/x-ms-asf",
1009 .extensions = "asf,wmv,wma",
1010 .priv_data_size = sizeof(ASFContext),
1011 .audio_codec = AV_CODEC_ID_WMAV2,
1012 .video_codec = AV_CODEC_ID_MSMPEG4V3,
1013 .write_header = asf_write_header,
1014 .write_packet = asf_write_packet,
1015 .write_trailer = asf_write_trailer,
1016 .flags = AVFMT_GLOBALHEADER,
1017 .codec_tag = (const AVCodecTag * const []) {
1018 codec_asf_bmp_tags, ff_codec_bmp_tags, ff_codec_wav_tags, 0
1021 #endif /* CONFIG_ASF_MUXER */
1023 #if CONFIG_ASF_STREAM_MUXER
1024 AVOutputFormat ff_asf_stream_muxer = {
1025 .name = "asf_stream",
1026 .long_name = NULL_IF_CONFIG_SMALL("ASF (Advanced / Active Streaming Format)"),
1027 .mime_type = "video/x-ms-asf",
1028 .extensions = "asf,wmv,wma",
1029 .priv_data_size = sizeof(ASFContext),
1030 .audio_codec = AV_CODEC_ID_WMAV2,
1031 .video_codec = AV_CODEC_ID_MSMPEG4V3,
1032 .write_header = asf_write_stream_header,
1033 .write_packet = asf_write_packet,
1034 .write_trailer = asf_write_trailer,
1035 .flags = AVFMT_GLOBALHEADER,
1036 .codec_tag = (const AVCodecTag * const []) {
1037 codec_asf_bmp_tags, ff_codec_bmp_tags, ff_codec_wav_tags, 0
1040 #endif /* CONFIG_ASF_STREAM_MUXER */