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
22 #include "libavutil/dict.h"
23 #include "libavutil/mathematics.h"
25 #include "avio_internal.h"
34 #define ASF_INDEXED_INTERVAL 10000000
35 #define ASF_INDEX_BLOCK 600
37 #define ASF_PACKET_ERROR_CORRECTION_DATA_SIZE 0x2
38 #define ASF_PACKET_ERROR_CORRECTION_FLAGS \
39 (ASF_PACKET_FLAG_ERROR_CORRECTION_PRESENT | \
40 ASF_PACKET_ERROR_CORRECTION_DATA_SIZE)
42 #if (ASF_PACKET_ERROR_CORRECTION_FLAGS != 0)
43 # define ASF_PACKET_ERROR_CORRECTION_FLAGS_FIELD_SIZE 1
45 # define ASF_PACKET_ERROR_CORRECTION_FLAGS_FIELD_SIZE 0
48 #define ASF_PPI_PROPERTY_FLAGS \
49 (ASF_PL_FLAG_REPLICATED_DATA_LENGTH_FIELD_IS_BYTE | \
50 ASF_PL_FLAG_OFFSET_INTO_MEDIA_OBJECT_LENGTH_FIELD_IS_DWORD | \
51 ASF_PL_FLAG_MEDIA_OBJECT_NUMBER_LENGTH_FIELD_IS_BYTE | \
52 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
71 #if (ASF_PPI_FLAG_PACKET_LENGTH_FIELD_IS_BYTE == (ASF_PPI_LENGTH_TYPE_FLAGS & ASF_PPI_MASK_PACKET_LENGTH_FIELD_SIZE))
72 # define ASF_PPI_PACKET_LENGTH_FIELD_SIZE 1
74 #if (ASF_PPI_FLAG_PACKET_LENGTH_FIELD_IS_WORD == (ASF_PPI_LENGTH_TYPE_FLAGS & ASF_PPI_MASK_PACKET_LENGTH_FIELD_SIZE))
75 # define ASF_PPI_PACKET_LENGTH_FIELD_SIZE 2
77 #if (ASF_PPI_FLAG_PACKET_LENGTH_FIELD_IS_DWORD == (ASF_PPI_LENGTH_TYPE_FLAGS & ASF_PPI_MASK_PACKET_LENGTH_FIELD_SIZE))
78 # define ASF_PPI_PACKET_LENGTH_FIELD_SIZE 4
80 #ifndef ASF_PPI_PACKET_LENGTH_FIELD_SIZE
81 # define ASF_PPI_PACKET_LENGTH_FIELD_SIZE 0
84 #if (ASF_PPI_FLAG_PADDING_LENGTH_FIELD_IS_BYTE == (ASF_PPI_LENGTH_TYPE_FLAGS & ASF_PPI_MASK_PADDING_LENGTH_FIELD_SIZE))
85 # define ASF_PPI_PADDING_LENGTH_FIELD_SIZE 1
87 #if (ASF_PPI_FLAG_PADDING_LENGTH_FIELD_IS_WORD == (ASF_PPI_LENGTH_TYPE_FLAGS & ASF_PPI_MASK_PADDING_LENGTH_FIELD_SIZE))
88 # define ASF_PPI_PADDING_LENGTH_FIELD_SIZE 2
90 #if (ASF_PPI_FLAG_PADDING_LENGTH_FIELD_IS_DWORD == (ASF_PPI_LENGTH_TYPE_FLAGS & ASF_PPI_MASK_PADDING_LENGTH_FIELD_SIZE))
91 # define ASF_PPI_PADDING_LENGTH_FIELD_SIZE 4
93 #ifndef ASF_PPI_PADDING_LENGTH_FIELD_SIZE
94 # define ASF_PPI_PADDING_LENGTH_FIELD_SIZE 0
97 #if (ASF_PL_FLAG_REPLICATED_DATA_LENGTH_FIELD_IS_BYTE == (ASF_PPI_PROPERTY_FLAGS & ASF_PL_MASK_REPLICATED_DATA_LENGTH_FIELD_SIZE))
98 # define ASF_PAYLOAD_REPLICATED_DATA_LENGTH_FIELD_SIZE 1
100 #if (ASF_PL_FLAG_REPLICATED_DATA_LENGTH_FIELD_IS_WORD == (ASF_PPI_PROPERTY_FLAGS & ASF_PL_MASK_REPLICATED_DATA_LENGTH_FIELD_SIZE))
101 # define ASF_PAYLOAD_REPLICATED_DATA_LENGTH_FIELD_SIZE 2
103 #if (ASF_PL_FLAG_REPLICATED_DATA_LENGTH_FIELD_IS_DWORD == (ASF_PPI_PROPERTY_FLAGS & ASF_PL_MASK_REPLICATED_DATA_LENGTH_FIELD_SIZE))
104 # define ASF_PAYLOAD_REPLICATED_DATA_LENGTH_FIELD_SIZE 4
106 #ifndef ASF_PAYLOAD_REPLICATED_DATA_LENGTH_FIELD_SIZE
107 # define ASF_PAYLOAD_REPLICATED_DATA_LENGTH_FIELD_SIZE 0
110 #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))
111 # define ASF_PAYLOAD_OFFSET_INTO_MEDIA_OBJECT_FIELD_SIZE 1
113 #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))
114 # define ASF_PAYLOAD_OFFSET_INTO_MEDIA_OBJECT_FIELD_SIZE 2
116 #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))
117 # define ASF_PAYLOAD_OFFSET_INTO_MEDIA_OBJECT_FIELD_SIZE 4
119 #ifndef ASF_PAYLOAD_OFFSET_INTO_MEDIA_OBJECT_FIELD_SIZE
120 # define ASF_PAYLOAD_OFFSET_INTO_MEDIA_OBJECT_FIELD_SIZE 0
123 #if (ASF_PL_FLAG_MEDIA_OBJECT_NUMBER_LENGTH_FIELD_IS_BYTE == (ASF_PPI_PROPERTY_FLAGS & ASF_PL_MASK_MEDIA_OBJECT_NUMBER_LENGTH_FIELD_SIZE))
124 # define ASF_PAYLOAD_MEDIA_OBJECT_NUMBER_FIELD_SIZE 1
126 #if (ASF_PL_FLAG_MEDIA_OBJECT_NUMBER_LENGTH_FIELD_IS_WORD == (ASF_PPI_PROPERTY_FLAGS & ASF_PL_MASK_MEDIA_OBJECT_NUMBER_LENGTH_FIELD_SIZE))
127 # define ASF_PAYLOAD_MEDIA_OBJECT_NUMBER_FIELD_SIZE 2
129 #if (ASF_PL_FLAG_MEDIA_OBJECT_NUMBER_LENGTH_FIELD_IS_DWORD == (ASF_PPI_PROPERTY_FLAGS & ASF_PL_MASK_MEDIA_OBJECT_NUMBER_LENGTH_FIELD_SIZE))
130 # define ASF_PAYLOAD_MEDIA_OBJECT_NUMBER_FIELD_SIZE 4
132 #ifndef ASF_PAYLOAD_MEDIA_OBJECT_NUMBER_FIELD_SIZE
133 # define ASF_PAYLOAD_MEDIA_OBJECT_NUMBER_FIELD_SIZE 0
136 #if (ASF_PL_FLAG_PAYLOAD_LENGTH_FIELD_IS_BYTE == (ASF_PAYLOAD_FLAGS & ASF_PL_MASK_PAYLOAD_LENGTH_FIELD_SIZE))
137 # define ASF_PAYLOAD_LENGTH_FIELD_SIZE 1
139 #if (ASF_PL_FLAG_PAYLOAD_LENGTH_FIELD_IS_WORD == (ASF_PAYLOAD_FLAGS & ASF_PL_MASK_PAYLOAD_LENGTH_FIELD_SIZE))
140 # define ASF_PAYLOAD_LENGTH_FIELD_SIZE 2
142 #ifndef ASF_PAYLOAD_LENGTH_FIELD_SIZE
143 # define ASF_PAYLOAD_LENGTH_FIELD_SIZE 0
146 #define PACKET_HEADER_MIN_SIZE \
147 (ASF_PACKET_ERROR_CORRECTION_FLAGS_FIELD_SIZE + \
148 ASF_PACKET_ERROR_CORRECTION_DATA_SIZE + \
149 1 + /* Length Type Flags */ \
150 1 + /* Property Flags */ \
151 ASF_PPI_PACKET_LENGTH_FIELD_SIZE + \
152 ASF_PPI_SEQUENCE_FIELD_SIZE + \
153 ASF_PPI_PADDING_LENGTH_FIELD_SIZE + \
154 4 + /* Send Time Field */ \
155 2) /* Duration Field */
157 // Replicated Data shall be at least 8 bytes long.
158 #define ASF_PAYLOAD_REPLICATED_DATA_LENGTH 0x08
160 #define PAYLOAD_HEADER_SIZE_SINGLE_PAYLOAD \
161 (1 + /* Stream Number */ \
162 ASF_PAYLOAD_MEDIA_OBJECT_NUMBER_FIELD_SIZE + \
163 ASF_PAYLOAD_OFFSET_INTO_MEDIA_OBJECT_FIELD_SIZE + \
164 ASF_PAYLOAD_REPLICATED_DATA_LENGTH_FIELD_SIZE + \
165 ASF_PAYLOAD_REPLICATED_DATA_LENGTH)
167 #define PAYLOAD_HEADER_SIZE_MULTIPLE_PAYLOADS \
168 (1 + /* Stream Number */ \
169 ASF_PAYLOAD_MEDIA_OBJECT_NUMBER_FIELD_SIZE + \
170 ASF_PAYLOAD_OFFSET_INTO_MEDIA_OBJECT_FIELD_SIZE + \
171 ASF_PAYLOAD_REPLICATED_DATA_LENGTH_FIELD_SIZE + \
172 ASF_PAYLOAD_REPLICATED_DATA_LENGTH + \
173 ASF_PAYLOAD_LENGTH_FIELD_SIZE)
175 #define SINGLE_PAYLOAD_DATA_LENGTH \
177 PACKET_HEADER_MIN_SIZE - \
178 PAYLOAD_HEADER_SIZE_SINGLE_PAYLOAD)
180 #define MULTI_PAYLOAD_CONSTANT \
182 PACKET_HEADER_MIN_SIZE - \
183 1 - /* Payload Flags */ \
184 2 * PAYLOAD_HEADER_SIZE_MULTIPLE_PAYLOADS)
186 #define DATA_HEADER_SIZE 50
188 typedef struct ASFStream {
191 /* use for reading */
197 int ds_span; /* descrambling */
203 uint16_t stream_language_index;
206 uint32_t palette[256];
209 typedef struct ASFContext {
212 ASFStream streams[128]; ///< it's max number and it's not that big
213 /* non streamed additonnal info */
214 uint64_t nb_packets; ///< how many packets are there in the file, invalid if broadcasting
215 int64_t duration; ///< in 100ns units
217 unsigned char multi_payloads_present;
218 int packet_size_left;
219 int packet_timestamp_start;
220 int packet_timestamp_end;
221 unsigned int packet_nb_payloads;
222 uint8_t packet_buf[PACKET_SIZE];
224 /* only for reading */
225 uint64_t data_offset; ///< beginning of the first data packet
227 int64_t last_indexed_pts;
229 uint32_t nb_index_count;
230 uint32_t nb_index_memory_alloc;
231 uint16_t maximum_packet;
234 static const AVCodecTag codec_asf_bmp_tags[] = {
235 { AV_CODEC_ID_MPEG4, MKTAG('M', 'P', '4', 'S') },
236 { AV_CODEC_ID_MPEG4, MKTAG('M', '4', 'S', '2') },
237 { AV_CODEC_ID_MSMPEG4V3, MKTAG('M', 'P', '4', '3') },
238 { AV_CODEC_ID_NONE, 0 },
241 #define PREROLL_TIME 3100
243 static void put_guid(AVIOContext *s, const ff_asf_guid *g)
245 assert(sizeof(*g) == 16);
246 avio_write(s, *g, sizeof(*g));
249 static void put_str16(AVIOContext *s, const char *tag)
253 AVIOContext *dyn_buf;
254 if (avio_open_dyn_buf(&dyn_buf) < 0)
257 avio_put_str16le(dyn_buf, tag);
258 len = avio_close_dyn_buf(dyn_buf, &pb);
260 avio_write(s, pb, len);
264 static int64_t put_header(AVIOContext *pb, const ff_asf_guid *g)
274 /* update header size */
275 static void end_header(AVIOContext *pb, int64_t pos)
279 pos1 = avio_tell(pb);
280 avio_seek(pb, pos + 16, SEEK_SET);
281 avio_wl64(pb, pos1 - pos);
282 avio_seek(pb, pos1, SEEK_SET);
285 /* write an asf chunk (only used in streaming case) */
286 static void put_chunk(AVFormatContext *s, int type,
287 int payload_length, int flags)
289 ASFContext *asf = s->priv_data;
290 AVIOContext *pb = s->pb;
293 length = payload_length + 8;
295 avio_wl16(pb, length); // size
296 avio_wl32(pb, asf->seqno); // sequence number
297 avio_wl16(pb, flags); // unknown bytes
298 avio_wl16(pb, length); // size_confirm
302 /* convert from unix to windows time */
303 static int64_t unix_to_file_time(int ti)
307 t = ti * INT64_C(10000000);
308 t += INT64_C(116444736000000000);
312 static int32_t get_send_time(ASFContext *asf, int64_t pres_time, uint64_t *offset)
315 int32_t send_time = 0;
316 *offset = asf->data_offset + DATA_HEADER_SIZE;
317 for (i = 0; i < asf->nb_index_count; i++) {
318 if (pres_time <= asf->index_ptr[i].send_time)
320 send_time = asf->index_ptr[i].send_time;
321 *offset = asf->index_ptr[i].offset;
324 return send_time / 10000;
327 static int asf_write_markers(AVFormatContext *s)
329 ASFContext *asf = s->priv_data;
330 AVIOContext *pb = s->pb;
332 AVRational scale = {1, 10000000};
333 int64_t hpos = put_header(pb, &ff_asf_marker_header);
335 put_guid(pb, &ff_asf_reserved_4); // ASF spec mandates this reserved value
336 avio_wl32(pb, s->nb_chapters); // markers count
337 avio_wl16(pb, 0); // ASF spec mandates 0 for this
338 avio_wl16(pb, 0); // name length 0, no name given
340 for (i = 0; i < s->nb_chapters; i++) {
341 AVChapter *c = s->chapters[i];
342 AVDictionaryEntry *t = av_dict_get(c->metadata, "title", NULL, 0);
343 int64_t pres_time = av_rescale_q(c->start, c->time_base, scale);
345 int32_t send_time = get_send_time(asf, pres_time, &offset);
348 AVIOContext *dyn_buf;
350 if (avio_open_dyn_buf(&dyn_buf) < 0)
351 return AVERROR(ENOMEM);
352 avio_put_str16le(dyn_buf, t->value);
353 len = avio_close_dyn_buf(dyn_buf, &buf);
355 avio_wl64(pb, offset); // offset of the packet with send_time
356 avio_wl64(pb, pres_time + PREROLL_TIME * 10000); // presentation time
357 avio_wl16(pb, 12 + len); // entry length
358 avio_wl32(pb, send_time); // send time
359 avio_wl32(pb, 0); // flags, should be 0
360 avio_wl32(pb, len / 2); // marker desc length in WCHARS!
362 avio_write(pb, buf, len); // marker desc
366 end_header(pb, hpos);
370 /* write the header (used two times if non streamed) */
371 static int asf_write_header1(AVFormatContext *s, int64_t file_size,
372 int64_t data_chunk_size)
374 ASFContext *asf = s->priv_data;
375 AVIOContext *pb = s->pb;
376 AVDictionaryEntry *tags[5];
377 int header_size, n, extra_size, extra_size2, wav_extra_size, file_time;
381 int64_t header_offset, cur_pos, hpos;
385 ff_metadata_conv(&s->metadata, ff_asf_metadata_conv, NULL);
387 tags[0] = av_dict_get(s->metadata, "title", NULL, 0);
388 tags[1] = av_dict_get(s->metadata, "author", NULL, 0);
389 tags[2] = av_dict_get(s->metadata, "copyright", NULL, 0);
390 tags[3] = av_dict_get(s->metadata, "comment", NULL, 0);
391 tags[4] = av_dict_get(s->metadata, "rating", NULL, 0);
393 duration = asf->duration + PREROLL_TIME * 10000;
394 has_title = tags[0] || tags[1] || tags[2] || tags[3] || tags[4];
395 metadata_count = av_dict_count(s->metadata);
398 for (n = 0; n < s->nb_streams; n++) {
399 enc = s->streams[n]->codec;
401 avpriv_set_pts_info(s->streams[n], 32, 1, 1000); /* 32 bit pts in ms */
403 bit_rate += enc->bit_rate;
406 if (asf->is_streamed) {
407 put_chunk(s, 0x4824, 0, 0xc00); /* start of stream (length will be patched later) */
410 put_guid(pb, &ff_asf_header);
411 avio_wl64(pb, -1); /* header length, will be patched after */
412 avio_wl32(pb, 3 + has_title + !!metadata_count + s->nb_streams); /* number of chunks in header */
413 avio_w8(pb, 1); /* ??? */
414 avio_w8(pb, 2); /* ??? */
417 header_offset = avio_tell(pb);
418 hpos = put_header(pb, &ff_asf_file_header);
419 put_guid(pb, &ff_asf_my_guid);
420 avio_wl64(pb, file_size);
422 avio_wl64(pb, unix_to_file_time(file_time));
423 avio_wl64(pb, asf->nb_packets); /* number of packets */
424 avio_wl64(pb, duration); /* end time stamp (in 100ns units) */
425 avio_wl64(pb, asf->duration); /* duration (in 100ns units) */
426 avio_wl64(pb, PREROLL_TIME); /* start time stamp */
427 avio_wl32(pb, (asf->is_streamed || !pb->seekable) ? 3 : 2); /* ??? */
428 avio_wl32(pb, s->packet_size); /* packet size */
429 avio_wl32(pb, s->packet_size); /* packet size */
430 avio_wl32(pb, bit_rate); /* Nominal data rate in bps */
431 end_header(pb, hpos);
433 /* unknown headers */
434 hpos = put_header(pb, &ff_asf_head1_guid);
435 put_guid(pb, &ff_asf_head2_guid);
438 end_header(pb, hpos);
440 /* title and other infos */
444 AVIOContext *dyn_buf;
446 if (avio_open_dyn_buf(&dyn_buf) < 0)
447 return AVERROR(ENOMEM);
449 hpos = put_header(pb, &ff_asf_comment_header);
451 for (n = 0; n < FF_ARRAY_ELEMS(tags); n++) {
452 len = tags[n] ? avio_put_str16le(dyn_buf, tags[n]->value) : 0;
455 len = avio_close_dyn_buf(dyn_buf, &buf);
456 avio_write(pb, buf, len);
458 end_header(pb, hpos);
460 if (metadata_count) {
461 AVDictionaryEntry *tag = NULL;
462 hpos = put_header(pb, &ff_asf_extended_content_header);
463 avio_wl16(pb, metadata_count);
464 while ((tag = av_dict_get(s->metadata, "", tag, AV_DICT_IGNORE_SUFFIX))) {
465 put_str16(pb, tag->key);
467 put_str16(pb, tag->value);
469 end_header(pb, hpos);
471 /* chapters using ASF markers */
472 if (!asf->is_streamed && s->nb_chapters) {
474 if (ret = asf_write_markers(s))
478 for (n = 0; n < s->nb_streams; n++) {
480 // ASFStream *stream = &asf->streams[n];
482 enc = s->streams[n]->codec;
483 asf->streams[n].num = n + 1;
484 asf->streams[n].seq = 0;
486 switch (enc->codec_type) {
487 case AVMEDIA_TYPE_AUDIO:
489 extra_size = 18 + wav_extra_size;
493 case AVMEDIA_TYPE_VIDEO:
494 wav_extra_size = enc->extradata_size;
495 extra_size = 0x33 + wav_extra_size;
500 hpos = put_header(pb, &ff_asf_stream_header);
501 if (enc->codec_type == AVMEDIA_TYPE_AUDIO) {
502 put_guid(pb, &ff_asf_audio_stream);
503 put_guid(pb, &ff_asf_audio_conceal_spread);
505 put_guid(pb, &ff_asf_video_stream);
506 put_guid(pb, &ff_asf_video_conceal_none);
508 avio_wl64(pb, 0); /* ??? */
509 es_pos = avio_tell(pb);
510 avio_wl32(pb, extra_size); /* wav header len */
511 avio_wl32(pb, extra_size2); /* additional data len */
512 avio_wl16(pb, n + 1); /* stream number */
513 avio_wl32(pb, 0); /* ??? */
515 if (enc->codec_type == AVMEDIA_TYPE_AUDIO) {
516 /* WAVEFORMATEX header */
517 int wavsize = ff_put_wav_header(pb, enc);
521 if (wavsize != extra_size) {
522 cur_pos = avio_tell(pb);
523 avio_seek(pb, es_pos, SEEK_SET);
524 avio_wl32(pb, wavsize); /* wav header len */
525 avio_seek(pb, cur_pos, SEEK_SET);
527 /* ERROR Correction */
529 if (enc->codec_id == AV_CODEC_ID_ADPCM_G726 || !enc->block_align) {
530 avio_wl16(pb, 0x0190);
531 avio_wl16(pb, 0x0190);
533 avio_wl16(pb, enc->block_align);
534 avio_wl16(pb, enc->block_align);
539 avio_wl32(pb, enc->width);
540 avio_wl32(pb, enc->height);
541 avio_w8(pb, 2); /* ??? */
542 avio_wl16(pb, 40 + enc->extradata_size); /* size */
544 /* BITMAPINFOHEADER header */
545 ff_put_bmp_header(pb, enc, ff_codec_bmp_tags, 1);
547 end_header(pb, hpos);
552 hpos = put_header(pb, &ff_asf_codec_comment_header);
553 put_guid(pb, &ff_asf_codec_comment1_header);
554 avio_wl32(pb, s->nb_streams);
555 for (n = 0; n < s->nb_streams; n++) {
556 const AVCodecDescriptor *codec_desc;
559 enc = s->streams[n]->codec;
560 codec_desc = avcodec_descriptor_get(enc->codec_id);
562 if (enc->codec_type == AVMEDIA_TYPE_AUDIO)
564 else if (enc->codec_type == AVMEDIA_TYPE_VIDEO)
569 if (enc->codec_id == AV_CODEC_ID_WMAV2)
570 desc = "Windows Media Audio V8";
572 desc = codec_desc ? codec_desc->name : NULL;
575 AVIOContext *dyn_buf;
579 if (avio_open_dyn_buf(&dyn_buf) < 0)
580 return AVERROR(ENOMEM);
582 avio_put_str16le(dyn_buf, desc);
583 len = avio_close_dyn_buf(dyn_buf, &buf);
584 avio_wl16(pb, len / 2); // "number of characters" = length in bytes / 2
586 avio_write(pb, buf, len);
591 avio_wl16(pb, 0); /* no parameters */
594 if (enc->codec_type == AVMEDIA_TYPE_AUDIO) {
596 avio_wl16(pb, enc->codec_tag);
599 avio_wl32(pb, enc->codec_tag);
604 end_header(pb, hpos);
606 /* patch the header size fields */
608 cur_pos = avio_tell(pb);
609 header_size = cur_pos - header_offset;
610 if (asf->is_streamed) {
611 header_size += 8 + 30 + DATA_HEADER_SIZE;
613 avio_seek(pb, header_offset - 10 - 30, SEEK_SET);
614 avio_wl16(pb, header_size);
615 avio_seek(pb, header_offset - 2 - 30, SEEK_SET);
616 avio_wl16(pb, header_size);
618 header_size -= 8 + 30 + DATA_HEADER_SIZE;
620 header_size += 24 + 6;
621 avio_seek(pb, header_offset - 14, SEEK_SET);
622 avio_wl64(pb, header_size);
623 avio_seek(pb, cur_pos, SEEK_SET);
625 /* movie chunk, followed by packets of packet_size */
626 asf->data_offset = cur_pos;
627 put_guid(pb, &ff_asf_data_header);
628 avio_wl64(pb, data_chunk_size);
629 put_guid(pb, &ff_asf_my_guid);
630 avio_wl64(pb, asf->nb_packets); /* nb packets */
631 avio_w8(pb, 1); /* ??? */
632 avio_w8(pb, 1); /* ??? */
636 static int asf_write_header(AVFormatContext *s)
638 ASFContext *asf = s->priv_data;
640 s->packet_size = PACKET_SIZE;
643 asf->last_indexed_pts = 0;
644 asf->index_ptr = av_malloc(sizeof(ASFIndex) * ASF_INDEX_BLOCK);
645 asf->nb_index_memory_alloc = ASF_INDEX_BLOCK;
646 asf->nb_index_count = 0;
647 asf->maximum_packet = 0;
649 /* the data-chunk-size has to be 50 (DATA_HEADER_SIZE), which is
650 * data_size - asf->data_offset at the moment this function is done.
651 * It is needed to use asf as a streamable format. */
652 if (asf_write_header1(s, 0, DATA_HEADER_SIZE) < 0) {
654 av_freep(&asf->index_ptr);
660 asf->packet_nb_payloads = 0;
661 asf->packet_timestamp_start = -1;
662 asf->packet_timestamp_end = -1;
663 ffio_init_context(&asf->pb, asf->packet_buf, s->packet_size, 1,
664 NULL, NULL, NULL, NULL);
669 static int asf_write_stream_header(AVFormatContext *s)
671 ASFContext *asf = s->priv_data;
673 asf->is_streamed = 1;
675 return asf_write_header(s);
678 static int put_payload_parsing_info(AVFormatContext *s,
679 unsigned sendtime, unsigned duration,
680 int nb_payloads, int padsize)
682 ASFContext *asf = s->priv_data;
683 AVIOContext *pb = s->pb;
685 int64_t start = avio_tell(pb);
687 int iLengthTypeFlags = ASF_PPI_LENGTH_TYPE_FLAGS;
689 padsize -= PACKET_HEADER_MIN_SIZE;
690 if (asf->multi_payloads_present)
692 assert(padsize >= 0);
694 avio_w8(pb, ASF_PACKET_ERROR_CORRECTION_FLAGS);
695 for (i = 0; i < ASF_PACKET_ERROR_CORRECTION_DATA_SIZE; i++)
698 if (asf->multi_payloads_present)
699 iLengthTypeFlags |= ASF_PPI_FLAG_MULTIPLE_PAYLOADS_PRESENT;
703 iLengthTypeFlags |= ASF_PPI_FLAG_PADDING_LENGTH_FIELD_IS_BYTE;
705 iLengthTypeFlags |= ASF_PPI_FLAG_PADDING_LENGTH_FIELD_IS_WORD;
707 avio_w8(pb, iLengthTypeFlags);
709 avio_w8(pb, ASF_PPI_PROPERTY_FLAGS);
711 if (iLengthTypeFlags & ASF_PPI_FLAG_PADDING_LENGTH_FIELD_IS_WORD)
712 avio_wl16(pb, padsize - 2);
713 if (iLengthTypeFlags & ASF_PPI_FLAG_PADDING_LENGTH_FIELD_IS_BYTE)
714 avio_w8(pb, padsize - 1);
716 avio_wl32(pb, sendtime);
717 avio_wl16(pb, duration);
718 if (asf->multi_payloads_present)
719 avio_w8(pb, nb_payloads | ASF_PAYLOAD_FLAGS);
721 ppi_size = avio_tell(pb) - start;
726 static void flush_packet(AVFormatContext *s)
728 ASFContext *asf = s->priv_data;
729 int packet_hdr_size, packet_filled_size;
731 assert(asf->packet_timestamp_end >= asf->packet_timestamp_start);
733 if (asf->is_streamed)
734 put_chunk(s, 0x4424, s->packet_size, 0);
736 packet_hdr_size = put_payload_parsing_info(s,
737 asf->packet_timestamp_start,
738 asf->packet_timestamp_end -
739 asf->packet_timestamp_start,
740 asf->packet_nb_payloads,
741 asf->packet_size_left);
743 packet_filled_size = PACKET_SIZE - asf->packet_size_left;
744 assert(packet_hdr_size <= asf->packet_size_left);
745 memset(asf->packet_buf + packet_filled_size, 0, asf->packet_size_left);
747 avio_write(s->pb, asf->packet_buf, s->packet_size - packet_hdr_size);
751 asf->packet_nb_payloads = 0;
752 asf->packet_timestamp_start = -1;
753 asf->packet_timestamp_end = -1;
754 ffio_init_context(&asf->pb, asf->packet_buf, s->packet_size, 1,
755 NULL, NULL, NULL, NULL);
758 static void put_payload_header(AVFormatContext *s, ASFStream *stream,
759 int presentation_time, int m_obj_size,
760 int m_obj_offset, int payload_len, int flags)
762 ASFContext *asf = s->priv_data;
763 AVIOContext *pb = &asf->pb;
767 if (flags & AV_PKT_FLAG_KEY)
768 val |= ASF_PL_FLAG_KEY_FRAME;
771 avio_w8(pb, stream->seq); // Media object number
772 avio_wl32(pb, m_obj_offset); // Offset Into Media Object
774 // Replicated Data shall be at least 8 bytes long.
775 // The first 4 bytes of data shall contain the
776 // Size of the Media Object that the payload belongs to.
777 // The next 4 bytes of data shall contain the
778 // Presentation Time for the media object that the payload belongs to.
779 avio_w8(pb, ASF_PAYLOAD_REPLICATED_DATA_LENGTH);
781 avio_wl32(pb, m_obj_size); // Replicated Data - Media Object Size
782 avio_wl32(pb, presentation_time); // Replicated Data - Presentation Time
784 if (asf->multi_payloads_present) {
785 avio_wl16(pb, payload_len); // payload length
789 static void put_frame(AVFormatContext *s, ASFStream *stream, AVStream *avst,
790 int timestamp, const uint8_t *buf,
791 int m_obj_size, int flags)
793 ASFContext *asf = s->priv_data;
794 int m_obj_offset, payload_len, frag_len1;
797 while (m_obj_offset < m_obj_size) {
798 payload_len = m_obj_size - m_obj_offset;
799 if (asf->packet_timestamp_start == -1) {
800 asf->multi_payloads_present = (payload_len < MULTI_PAYLOAD_CONSTANT);
802 asf->packet_size_left = PACKET_SIZE;
803 if (asf->multi_payloads_present) {
804 frag_len1 = MULTI_PAYLOAD_CONSTANT - 1;
806 frag_len1 = SINGLE_PAYLOAD_DATA_LENGTH;
808 asf->packet_timestamp_start = timestamp;
811 frag_len1 = asf->packet_size_left -
812 PAYLOAD_HEADER_SIZE_MULTIPLE_PAYLOADS -
813 PACKET_HEADER_MIN_SIZE - 1;
815 if (frag_len1 < payload_len &&
816 avst->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
822 if (payload_len > frag_len1)
823 payload_len = frag_len1;
824 else if (payload_len == (frag_len1 - 1))
825 payload_len = frag_len1 - 2; // additional byte need to put padding length
827 put_payload_header(s, stream, timestamp + PREROLL_TIME,
828 m_obj_size, m_obj_offset, payload_len, flags);
829 avio_write(&asf->pb, buf, payload_len);
831 if (asf->multi_payloads_present)
832 asf->packet_size_left -= (payload_len + PAYLOAD_HEADER_SIZE_MULTIPLE_PAYLOADS);
834 asf->packet_size_left -= (payload_len + PAYLOAD_HEADER_SIZE_SINGLE_PAYLOAD);
835 asf->packet_timestamp_end = timestamp;
837 asf->packet_nb_payloads++;
841 m_obj_offset += payload_len;
844 if (!asf->multi_payloads_present)
846 else if (asf->packet_size_left <= (PAYLOAD_HEADER_SIZE_MULTIPLE_PAYLOADS + PACKET_HEADER_MIN_SIZE + 1))
852 static int asf_write_packet(AVFormatContext *s, AVPacket *pkt)
854 ASFContext *asf = s->priv_data;
855 AVIOContext *pb = s->pb;
858 AVCodecContext *codec;
859 int64_t packet_st, pts;
861 int flags = pkt->flags;
862 uint64_t offset = avio_tell(pb);
864 codec = s->streams[pkt->stream_index]->codec;
865 stream = &asf->streams[pkt->stream_index];
867 if (codec->codec_type == AVMEDIA_TYPE_AUDIO)
868 flags &= ~AV_PKT_FLAG_KEY;
870 pts = (pkt->pts != AV_NOPTS_VALUE) ? pkt->pts : pkt->dts;
871 assert(pts != AV_NOPTS_VALUE);
872 duration = pts * 10000;
873 asf->duration = FFMAX(asf->duration, duration + pkt->duration * 10000);
875 packet_st = asf->nb_packets;
876 put_frame(s, stream, s->streams[pkt->stream_index],
877 pkt->dts, pkt->data, pkt->size, flags);
880 if ((!asf->is_streamed) && (flags & AV_PKT_FLAG_KEY)) {
881 start_sec = (int)(duration / INT64_C(10000000));
882 if (start_sec != (int)(asf->last_indexed_pts / INT64_C(10000000))) {
883 for (i = asf->nb_index_count; i < start_sec; i++) {
884 if (i >= asf->nb_index_memory_alloc) {
886 asf->nb_index_memory_alloc += ASF_INDEX_BLOCK;
887 if ((err = av_reallocp_array(&asf->index_ptr,
888 asf->nb_index_memory_alloc,
889 sizeof(*asf->index_ptr))) < 0) {
890 asf->nb_index_memory_alloc = 0;
895 asf->index_ptr[i].packet_number = (uint32_t)packet_st;
896 asf->index_ptr[i].packet_count = (uint16_t)(asf->nb_packets - packet_st);
897 asf->index_ptr[i].send_time = start_sec * INT64_C(10000000);
898 asf->index_ptr[i].offset = offset;
899 asf->maximum_packet = FFMAX(asf->maximum_packet,
900 (uint16_t)(asf->nb_packets - packet_st));
902 asf->nb_index_count = start_sec;
903 asf->last_indexed_pts = duration;
909 static int asf_write_index(AVFormatContext *s, ASFIndex *index,
910 uint16_t max, uint32_t count)
912 AVIOContext *pb = s->pb;
915 put_guid(pb, &ff_asf_simple_index_header);
916 avio_wl64(pb, 24 + 16 + 8 + 4 + 4 + (4 + 2) * count);
917 put_guid(pb, &ff_asf_my_guid);
918 avio_wl64(pb, ASF_INDEXED_INTERVAL);
920 avio_wl32(pb, count);
921 for (i = 0; i < count; i++) {
922 avio_wl32(pb, index[i].packet_number);
923 avio_wl16(pb, index[i].packet_count);
929 static int asf_write_trailer(AVFormatContext *s)
931 ASFContext *asf = s->priv_data;
932 int64_t file_size, data_size;
934 /* flush the current packet */
935 if (asf->pb.buf_ptr > asf->pb.buffer)
939 data_size = avio_tell(s->pb);
940 if ((!asf->is_streamed) && (asf->nb_index_count != 0))
941 asf_write_index(s, asf->index_ptr, asf->maximum_packet, asf->nb_index_count);
944 if (asf->is_streamed || !s->pb->seekable) {
945 put_chunk(s, 0x4524, 0, 0); /* end of stream */
947 /* rewrite an updated header */
948 file_size = avio_tell(s->pb);
949 avio_seek(s->pb, 0, SEEK_SET);
950 asf_write_header1(s, file_size, data_size - asf->data_offset);
953 av_free(asf->index_ptr);
958 AVOutputFormat ff_asf_muxer = {
960 .long_name = NULL_IF_CONFIG_SMALL("ASF (Advanced / Active Streaming Format)"),
961 .mime_type = "video/x-ms-asf",
962 .extensions = "asf,wmv,wma",
963 .priv_data_size = sizeof(ASFContext),
964 .audio_codec = CONFIG_LIBMP3LAME ? AV_CODEC_ID_MP3 : AV_CODEC_ID_MP2,
965 .video_codec = AV_CODEC_ID_MSMPEG4V3,
966 .write_header = asf_write_header,
967 .write_packet = asf_write_packet,
968 .write_trailer = asf_write_trailer,
969 .flags = AVFMT_GLOBALHEADER,
970 .codec_tag = (const AVCodecTag * const []) {
971 codec_asf_bmp_tags, ff_codec_bmp_tags, ff_codec_wav_tags, 0
974 #endif /* CONFIG_ASF_MUXER */
976 #if CONFIG_ASF_STREAM_MUXER
977 AVOutputFormat ff_asf_stream_muxer = {
978 .name = "asf_stream",
979 .long_name = NULL_IF_CONFIG_SMALL("ASF (Advanced / Active Streaming Format)"),
980 .mime_type = "video/x-ms-asf",
981 .extensions = "asf,wmv,wma",
982 .priv_data_size = sizeof(ASFContext),
983 .audio_codec = CONFIG_LIBMP3LAME ? AV_CODEC_ID_MP3 : AV_CODEC_ID_MP2,
984 .video_codec = AV_CODEC_ID_MSMPEG4V3,
985 .write_header = asf_write_stream_header,
986 .write_packet = asf_write_packet,
987 .write_trailer = asf_write_trailer,
988 .flags = AVFMT_GLOBALHEADER,
989 .codec_tag = (const AVCodecTag * const []) {
990 codec_asf_bmp_tags, ff_codec_bmp_tags, ff_codec_wav_tags, 0
993 #endif /* CONFIG_ASF_STREAM_MUXER */