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"
35 #define ASF_INDEXED_INTERVAL 10000000
36 #define ASF_INDEX_BLOCK (1<<9)
38 #define ASF_PACKET_ERROR_CORRECTION_DATA_SIZE 0x2
39 #define ASF_PACKET_ERROR_CORRECTION_FLAGS \
40 (ASF_PACKET_FLAG_ERROR_CORRECTION_PRESENT | \
41 ASF_PACKET_ERROR_CORRECTION_DATA_SIZE)
43 #if (ASF_PACKET_ERROR_CORRECTION_FLAGS != 0)
44 # define ASF_PACKET_ERROR_CORRECTION_FLAGS_FIELD_SIZE 1
46 # define ASF_PACKET_ERROR_CORRECTION_FLAGS_FIELD_SIZE 0
49 #define ASF_PPI_PROPERTY_FLAGS \
50 (ASF_PL_FLAG_REPLICATED_DATA_LENGTH_FIELD_IS_BYTE | \
51 ASF_PL_FLAG_OFFSET_INTO_MEDIA_OBJECT_LENGTH_FIELD_IS_DWORD | \
52 ASF_PL_FLAG_MEDIA_OBJECT_NUMBER_LENGTH_FIELD_IS_BYTE | \
53 ASF_PL_FLAG_STREAM_NUMBER_LENGTH_FIELD_IS_BYTE)
55 #define ASF_PPI_LENGTH_TYPE_FLAGS 0
57 #define ASF_PAYLOAD_FLAGS ASF_PL_FLAG_PAYLOAD_LENGTH_FIELD_IS_WORD
59 #if (ASF_PPI_FLAG_SEQUENCE_FIELD_IS_BYTE == (ASF_PPI_LENGTH_TYPE_FLAGS & ASF_PPI_MASK_SEQUENCE_FIELD_SIZE))
60 # define ASF_PPI_SEQUENCE_FIELD_SIZE 1
62 #if (ASF_PPI_FLAG_SEQUENCE_FIELD_IS_WORD == (ASF_PPI_LENGTH_TYPE_FLAGS & ASF_PPI_MASK_SEQUENCE_FIELD_SIZE))
63 # define ASF_PPI_SEQUENCE_FIELD_SIZE 2
65 #if (ASF_PPI_FLAG_SEQUENCE_FIELD_IS_DWORD == (ASF_PPI_LENGTH_TYPE_FLAGS & ASF_PPI_MASK_SEQUENCE_FIELD_SIZE))
66 # define ASF_PPI_SEQUENCE_FIELD_SIZE 4
68 #ifndef ASF_PPI_SEQUENCE_FIELD_SIZE
69 # 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 */
158 // Replicated Data shall be at least 8 bytes long.
159 #define ASF_PAYLOAD_REPLICATED_DATA_LENGTH 0x08
161 #define PAYLOAD_HEADER_SIZE_SINGLE_PAYLOAD \
162 (1 + /* Stream Number */ \
163 ASF_PAYLOAD_MEDIA_OBJECT_NUMBER_FIELD_SIZE + \
164 ASF_PAYLOAD_OFFSET_INTO_MEDIA_OBJECT_FIELD_SIZE + \
165 ASF_PAYLOAD_REPLICATED_DATA_LENGTH_FIELD_SIZE + \
166 ASF_PAYLOAD_REPLICATED_DATA_LENGTH)
168 #define PAYLOAD_HEADER_SIZE_MULTIPLE_PAYLOADS \
169 (1 + /* Stream Number */ \
170 ASF_PAYLOAD_MEDIA_OBJECT_NUMBER_FIELD_SIZE + \
171 ASF_PAYLOAD_OFFSET_INTO_MEDIA_OBJECT_FIELD_SIZE + \
172 ASF_PAYLOAD_REPLICATED_DATA_LENGTH_FIELD_SIZE + \
173 ASF_PAYLOAD_REPLICATED_DATA_LENGTH + \
174 ASF_PAYLOAD_LENGTH_FIELD_SIZE)
176 #define SINGLE_PAYLOAD_DATA_LENGTH \
178 PACKET_HEADER_MIN_SIZE - \
179 PAYLOAD_HEADER_SIZE_SINGLE_PAYLOAD)
181 #define MULTI_PAYLOAD_CONSTANT \
183 PACKET_HEADER_MIN_SIZE - \
184 1 - /* Payload Flags */ \
185 2 * PAYLOAD_HEADER_SIZE_MULTIPLE_PAYLOADS)
187 #define DATA_HEADER_SIZE 50
192 ASFStream streams[128]; ///< it's max number and it's not that big
193 /* non streamed additonnal info */
194 uint64_t nb_packets; ///< how many packets are there in the file, invalid if broadcasting
195 int64_t duration; ///< in 100ns units
197 unsigned char multi_payloads_present;
198 int packet_size_left;
199 int64_t packet_timestamp_start;
200 int64_t packet_timestamp_end;
201 unsigned int packet_nb_payloads;
202 uint8_t packet_buf[PACKET_SIZE];
204 /* only for reading */
205 uint64_t data_offset; ///< beginning of the first data packet
208 uint32_t nb_index_memory_alloc;
209 uint16_t maximum_packet;
210 uint32_t next_packet_number;
211 uint16_t next_packet_count;
212 uint64_t next_packet_offset;
217 static const AVCodecTag codec_asf_bmp_tags[] = {
218 { AV_CODEC_ID_MPEG4, MKTAG('M', '4', 'S', '2') },
219 { AV_CODEC_ID_MPEG4, MKTAG('M', 'P', '4', 'S') },
220 { AV_CODEC_ID_MSMPEG4V3, MKTAG('M', 'P', '4', '3') },
221 { AV_CODEC_ID_NONE, 0 },
224 #define PREROLL_TIME 3100
226 static void put_str16(AVIOContext *s, const char *tag)
230 AVIOContext *dyn_buf;
231 if (avio_open_dyn_buf(&dyn_buf) < 0)
234 avio_put_str16le(dyn_buf, tag);
235 len = avio_close_dyn_buf(dyn_buf, &pb);
237 avio_write(s, pb, len);
241 static int64_t put_header(AVIOContext *pb, const ff_asf_guid *g)
251 /* update header size */
252 static void end_header(AVIOContext *pb, int64_t pos)
256 pos1 = avio_tell(pb);
257 avio_seek(pb, pos + 16, SEEK_SET);
258 avio_wl64(pb, pos1 - pos);
259 avio_seek(pb, pos1, SEEK_SET);
262 /* write an asf chunk (only used in streaming case) */
263 static void put_chunk(AVFormatContext *s, int type,
264 int payload_length, int flags)
266 ASFContext *asf = s->priv_data;
267 AVIOContext *pb = s->pb;
270 length = payload_length + 8;
272 avio_wl16(pb, length); // size
273 avio_wl32(pb, asf->seqno); // sequence number
274 avio_wl16(pb, flags); // unknown bytes
275 avio_wl16(pb, length); // size_confirm
279 /* convert from unix to windows time */
280 static int64_t unix_to_file_time(int ti)
284 t = ti * INT64_C(10000000);
285 t += INT64_C(116444736000000000);
289 static int32_t get_send_time(ASFContext *asf, int64_t pres_time, uint64_t *offset)
292 int32_t send_time = 0;
293 *offset = asf->data_offset + DATA_HEADER_SIZE;
294 for (i = 0; i < asf->next_start_sec; i++) {
295 if (pres_time <= asf->index_ptr[i].send_time)
297 send_time = asf->index_ptr[i].send_time;
298 *offset = asf->index_ptr[i].offset;
301 return send_time / 10000;
304 static int asf_write_markers(AVFormatContext *s)
306 ASFContext *asf = s->priv_data;
307 AVIOContext *pb = s->pb;
309 AVRational scale = {1, 10000000};
310 int64_t hpos = put_header(pb, &ff_asf_marker_header);
312 ff_put_guid(pb, &ff_asf_reserved_4);// ASF spec mandates this reserved value
313 avio_wl32(pb, s->nb_chapters); // markers count
314 avio_wl16(pb, 0); // ASF spec mandates 0 for this
315 avio_wl16(pb, 0); // name length 0, no name given
317 for (i = 0; i < s->nb_chapters; i++) {
318 AVChapter *c = s->chapters[i];
319 AVDictionaryEntry *t = av_dict_get(c->metadata, "title", NULL, 0);
320 int64_t pres_time = av_rescale_q(c->start, c->time_base, scale);
322 int32_t send_time = get_send_time(asf, pres_time, &offset);
325 AVIOContext *dyn_buf;
327 if (avio_open_dyn_buf(&dyn_buf) < 0)
328 return AVERROR(ENOMEM);
329 avio_put_str16le(dyn_buf, t->value);
330 len = avio_close_dyn_buf(dyn_buf, &buf);
332 avio_wl64(pb, offset); // offset of the packet with send_time
333 avio_wl64(pb, pres_time + PREROLL_TIME * 10000); // presentation time
334 avio_wl16(pb, 12 + len); // entry length
335 avio_wl32(pb, send_time); // send time
336 avio_wl32(pb, 0); // flags, should be 0
337 avio_wl32(pb, len / 2); // marker desc length in WCHARS!
339 avio_write(pb, buf, len); // marker desc
343 end_header(pb, hpos);
347 /* write the header (used two times if non streamed) */
348 static int asf_write_header1(AVFormatContext *s, int64_t file_size,
349 int64_t data_chunk_size)
351 ASFContext *asf = s->priv_data;
352 AVIOContext *pb = s->pb;
353 AVDictionaryEntry *tags[5];
354 int header_size, n, extra_size, extra_size2, wav_extra_size, file_time;
358 int64_t header_offset, cur_pos, hpos;
362 ff_metadata_conv(&s->metadata, ff_asf_metadata_conv, NULL);
364 tags[0] = av_dict_get(s->metadata, "title", NULL, 0);
365 tags[1] = av_dict_get(s->metadata, "author", NULL, 0);
366 tags[2] = av_dict_get(s->metadata, "copyright", NULL, 0);
367 tags[3] = av_dict_get(s->metadata, "comment", NULL, 0);
368 tags[4] = av_dict_get(s->metadata, "rating", NULL, 0);
370 duration = asf->duration + PREROLL_TIME * 10000;
371 has_title = tags[0] || tags[1] || tags[2] || tags[3] || tags[4];
372 metadata_count = av_dict_count(s->metadata);
375 for (n = 0; n < s->nb_streams; n++) {
376 enc = s->streams[n]->codec;
378 avpriv_set_pts_info(s->streams[n], 32, 1, 1000); /* 32 bit pts in ms */
380 bit_rate += enc->bit_rate;
383 if (asf->is_streamed) {
384 put_chunk(s, 0x4824, 0, 0xc00); /* start of stream (length will be patched later) */
387 ff_put_guid(pb, &ff_asf_header);
388 avio_wl64(pb, -1); /* header length, will be patched after */
389 avio_wl32(pb, 3 + has_title + !!metadata_count + s->nb_streams); /* number of chunks in header */
390 avio_w8(pb, 1); /* ??? */
391 avio_w8(pb, 2); /* ??? */
394 header_offset = avio_tell(pb);
395 hpos = put_header(pb, &ff_asf_file_header);
396 ff_put_guid(pb, &ff_asf_my_guid);
397 avio_wl64(pb, file_size);
399 avio_wl64(pb, unix_to_file_time(file_time));
400 avio_wl64(pb, asf->nb_packets); /* number of packets */
401 avio_wl64(pb, duration); /* end time stamp (in 100ns units) */
402 avio_wl64(pb, asf->duration); /* duration (in 100ns units) */
403 avio_wl64(pb, PREROLL_TIME); /* start time stamp */
404 avio_wl32(pb, (asf->is_streamed || !pb->seekable) ? 3 : 2); /* ??? */
405 avio_wl32(pb, s->packet_size); /* packet size */
406 avio_wl32(pb, s->packet_size); /* packet size */
407 avio_wl32(pb, bit_rate); /* Nominal data rate in bps */
408 end_header(pb, hpos);
410 /* unknown headers */
411 hpos = put_header(pb, &ff_asf_head1_guid);
412 ff_put_guid(pb, &ff_asf_head2_guid);
415 end_header(pb, hpos);
417 /* title and other infos */
421 AVIOContext *dyn_buf;
423 if (avio_open_dyn_buf(&dyn_buf) < 0)
424 return AVERROR(ENOMEM);
426 hpos = put_header(pb, &ff_asf_comment_header);
428 for (n = 0; n < FF_ARRAY_ELEMS(tags); n++) {
429 len = tags[n] ? avio_put_str16le(dyn_buf, tags[n]->value) : 0;
432 len = avio_close_dyn_buf(dyn_buf, &buf);
433 avio_write(pb, buf, len);
435 end_header(pb, hpos);
437 if (metadata_count) {
438 AVDictionaryEntry *tag = NULL;
439 hpos = put_header(pb, &ff_asf_extended_content_header);
440 avio_wl16(pb, metadata_count);
441 while ((tag = av_dict_get(s->metadata, "", tag, AV_DICT_IGNORE_SUFFIX))) {
442 put_str16(pb, tag->key);
444 put_str16(pb, tag->value);
446 end_header(pb, hpos);
448 /* chapters using ASF markers */
449 if (!asf->is_streamed && s->nb_chapters) {
451 if (ret = asf_write_markers(s))
455 for (n = 0; n < s->nb_streams; n++) {
457 // ASFStream *stream = &asf->streams[n];
459 enc = s->streams[n]->codec;
460 asf->streams[n].num = n + 1;
461 asf->streams[n].seq = 1;
463 switch (enc->codec_type) {
464 case AVMEDIA_TYPE_AUDIO:
466 extra_size = 18 + wav_extra_size;
470 case AVMEDIA_TYPE_VIDEO:
471 wav_extra_size = enc->extradata_size;
472 extra_size = 0x33 + wav_extra_size;
477 hpos = put_header(pb, &ff_asf_stream_header);
478 if (enc->codec_type == AVMEDIA_TYPE_AUDIO) {
479 ff_put_guid(pb, &ff_asf_audio_stream);
480 ff_put_guid(pb, &ff_asf_audio_conceal_spread);
482 ff_put_guid(pb, &ff_asf_video_stream);
483 ff_put_guid(pb, &ff_asf_video_conceal_none);
485 avio_wl64(pb, 0); /* ??? */
486 es_pos = avio_tell(pb);
487 avio_wl32(pb, extra_size); /* wav header len */
488 avio_wl32(pb, extra_size2); /* additional data len */
489 avio_wl16(pb, n + 1); /* stream number */
490 avio_wl32(pb, 0); /* ??? */
492 if (enc->codec_type == AVMEDIA_TYPE_AUDIO) {
493 /* WAVEFORMATEX header */
494 int wavsize = ff_put_wav_header(pb, enc);
498 if (wavsize != extra_size) {
499 cur_pos = avio_tell(pb);
500 avio_seek(pb, es_pos, SEEK_SET);
501 avio_wl32(pb, wavsize); /* wav header len */
502 avio_seek(pb, cur_pos, SEEK_SET);
504 /* ERROR Correction */
506 if (enc->codec_id == AV_CODEC_ID_ADPCM_G726 || !enc->block_align) {
507 avio_wl16(pb, 0x0190);
508 avio_wl16(pb, 0x0190);
510 avio_wl16(pb, enc->block_align);
511 avio_wl16(pb, enc->block_align);
516 avio_wl32(pb, enc->width);
517 avio_wl32(pb, enc->height);
518 avio_w8(pb, 2); /* ??? */
519 avio_wl16(pb, 40 + enc->extradata_size); /* size */
521 /* BITMAPINFOHEADER header */
522 ff_put_bmp_header(pb, enc, ff_codec_bmp_tags, 1, 0);
524 end_header(pb, hpos);
529 hpos = put_header(pb, &ff_asf_codec_comment_header);
530 ff_put_guid(pb, &ff_asf_codec_comment1_header);
531 avio_wl32(pb, s->nb_streams);
532 for (n = 0; n < s->nb_streams; n++) {
537 AVIOContext *dyn_buf;
539 enc = s->streams[n]->codec;
540 p = avcodec_find_encoder(enc->codec_id);
542 if (enc->codec_type == AVMEDIA_TYPE_AUDIO)
544 else if (enc->codec_type == AVMEDIA_TYPE_VIDEO)
549 if (enc->codec_id == AV_CODEC_ID_WMAV2)
550 desc = "Windows Media Audio V8";
552 desc = p ? p->name : enc->codec_name;
554 if (avio_open_dyn_buf(&dyn_buf) < 0)
555 return AVERROR(ENOMEM);
557 avio_put_str16le(dyn_buf, desc);
558 len = avio_close_dyn_buf(dyn_buf, &buf);
559 avio_wl16(pb, len / 2); // "number of characters" = length in bytes / 2
561 avio_write(pb, buf, len);
564 avio_wl16(pb, 0); /* no parameters */
567 if (enc->codec_type == AVMEDIA_TYPE_AUDIO) {
569 avio_wl16(pb, enc->codec_tag);
572 avio_wl32(pb, enc->codec_tag);
577 end_header(pb, hpos);
579 /* patch the header size fields */
581 cur_pos = avio_tell(pb);
582 header_size = cur_pos - header_offset;
583 if (asf->is_streamed) {
584 header_size += 8 + 30 + DATA_HEADER_SIZE;
586 avio_seek(pb, header_offset - 10 - 30, SEEK_SET);
587 avio_wl16(pb, header_size);
588 avio_seek(pb, header_offset - 2 - 30, SEEK_SET);
589 avio_wl16(pb, header_size);
591 header_size -= 8 + 30 + DATA_HEADER_SIZE;
593 header_size += 24 + 6;
594 avio_seek(pb, header_offset - 14, SEEK_SET);
595 avio_wl64(pb, header_size);
596 avio_seek(pb, cur_pos, SEEK_SET);
598 /* movie chunk, followed by packets of packet_size */
599 asf->data_offset = cur_pos;
600 ff_put_guid(pb, &ff_asf_data_header);
601 avio_wl64(pb, data_chunk_size);
602 ff_put_guid(pb, &ff_asf_my_guid);
603 avio_wl64(pb, asf->nb_packets); /* nb packets */
604 avio_w8(pb, 1); /* ??? */
605 avio_w8(pb, 1); /* ??? */
609 static int asf_write_header(AVFormatContext *s)
611 ASFContext *asf = s->priv_data;
613 s->packet_size = PACKET_SIZE;
616 asf->index_ptr = av_malloc(sizeof(ASFIndex) * ASF_INDEX_BLOCK);
617 asf->nb_index_memory_alloc = ASF_INDEX_BLOCK;
618 asf->maximum_packet = 0;
620 /* the data-chunk-size has to be 50 (DATA_HEADER_SIZE), which is
621 * data_size - asf->data_offset at the moment this function is done.
622 * It is needed to use asf as a streamable format. */
623 if (asf_write_header1(s, 0, DATA_HEADER_SIZE) < 0) {
630 asf->packet_nb_payloads = 0;
631 asf->packet_timestamp_start = -1;
632 asf->packet_timestamp_end = -1;
633 ffio_init_context(&asf->pb, asf->packet_buf, s->packet_size, 1,
634 NULL, NULL, NULL, NULL);
636 if (s->avoid_negative_ts < 0)
637 s->avoid_negative_ts = 1;
642 static int asf_write_stream_header(AVFormatContext *s)
644 ASFContext *asf = s->priv_data;
646 asf->is_streamed = 1;
648 return asf_write_header(s);
651 static int put_payload_parsing_info(AVFormatContext *s,
652 unsigned sendtime, unsigned duration,
653 int nb_payloads, int padsize)
655 ASFContext *asf = s->priv_data;
656 AVIOContext *pb = s->pb;
658 int64_t start = avio_tell(pb);
660 int iLengthTypeFlags = ASF_PPI_LENGTH_TYPE_FLAGS;
662 padsize -= PACKET_HEADER_MIN_SIZE;
663 if (asf->multi_payloads_present)
665 av_assert0(padsize >= 0);
667 avio_w8(pb, ASF_PACKET_ERROR_CORRECTION_FLAGS);
668 for (i = 0; i < ASF_PACKET_ERROR_CORRECTION_DATA_SIZE; i++)
671 if (asf->multi_payloads_present)
672 iLengthTypeFlags |= ASF_PPI_FLAG_MULTIPLE_PAYLOADS_PRESENT;
676 iLengthTypeFlags |= ASF_PPI_FLAG_PADDING_LENGTH_FIELD_IS_BYTE;
678 iLengthTypeFlags |= ASF_PPI_FLAG_PADDING_LENGTH_FIELD_IS_WORD;
680 avio_w8(pb, iLengthTypeFlags);
682 avio_w8(pb, ASF_PPI_PROPERTY_FLAGS);
684 if (iLengthTypeFlags & ASF_PPI_FLAG_PADDING_LENGTH_FIELD_IS_WORD)
685 avio_wl16(pb, padsize - 2);
686 if (iLengthTypeFlags & ASF_PPI_FLAG_PADDING_LENGTH_FIELD_IS_BYTE)
687 avio_w8(pb, padsize - 1);
689 avio_wl32(pb, sendtime);
690 avio_wl16(pb, duration);
691 if (asf->multi_payloads_present)
692 avio_w8(pb, nb_payloads | ASF_PAYLOAD_FLAGS);
694 ppi_size = avio_tell(pb) - start;
699 static void flush_packet(AVFormatContext *s)
701 ASFContext *asf = s->priv_data;
702 int packet_hdr_size, packet_filled_size;
704 av_assert0(asf->packet_timestamp_end >= asf->packet_timestamp_start);
706 if (asf->is_streamed)
707 put_chunk(s, 0x4424, s->packet_size, 0);
709 packet_hdr_size = put_payload_parsing_info(s,
710 asf->packet_timestamp_start,
711 asf->packet_timestamp_end - asf->packet_timestamp_start,
712 asf->packet_nb_payloads,
713 asf->packet_size_left);
715 packet_filled_size = PACKET_SIZE - asf->packet_size_left;
716 av_assert0(packet_hdr_size <= asf->packet_size_left);
717 memset(asf->packet_buf + packet_filled_size, 0, asf->packet_size_left);
719 avio_write(s->pb, asf->packet_buf, s->packet_size - packet_hdr_size);
723 asf->packet_nb_payloads = 0;
724 asf->packet_timestamp_start = -1;
725 asf->packet_timestamp_end = -1;
726 ffio_init_context(&asf->pb, asf->packet_buf, s->packet_size, 1,
727 NULL, NULL, NULL, NULL);
730 static void put_payload_header(AVFormatContext *s, ASFStream *stream,
731 int64_t presentation_time, int m_obj_size,
732 int m_obj_offset, int payload_len, int flags)
734 ASFContext *asf = s->priv_data;
735 AVIOContext *pb = &asf->pb;
739 if (flags & AV_PKT_FLAG_KEY)
740 val |= ASF_PL_FLAG_KEY_FRAME;
743 avio_w8(pb, stream->seq); // Media object number
744 avio_wl32(pb, m_obj_offset); // Offset Into Media Object
746 // Replicated Data shall be at least 8 bytes long.
747 // The first 4 bytes of data shall contain the
748 // Size of the Media Object that the payload belongs to.
749 // The next 4 bytes of data shall contain the
750 // Presentation Time for the media object that the payload belongs to.
751 avio_w8(pb, ASF_PAYLOAD_REPLICATED_DATA_LENGTH);
753 avio_wl32(pb, m_obj_size); // Replicated Data - Media Object Size
754 avio_wl32(pb, (uint32_t) presentation_time); // Replicated Data - Presentation Time
756 if (asf->multi_payloads_present) {
757 avio_wl16(pb, payload_len); // payload length
761 static void put_frame(AVFormatContext *s, ASFStream *stream, AVStream *avst,
762 int64_t timestamp, const uint8_t *buf,
763 int m_obj_size, int flags)
765 ASFContext *asf = s->priv_data;
766 int m_obj_offset, payload_len, frag_len1;
769 while (m_obj_offset < m_obj_size) {
770 payload_len = m_obj_size - m_obj_offset;
771 if (asf->packet_timestamp_start == -1) {
772 asf->multi_payloads_present = (payload_len < MULTI_PAYLOAD_CONSTANT);
774 asf->packet_size_left = PACKET_SIZE;
775 if (asf->multi_payloads_present) {
776 frag_len1 = MULTI_PAYLOAD_CONSTANT - 1;
778 frag_len1 = SINGLE_PAYLOAD_DATA_LENGTH;
780 asf->packet_timestamp_start = timestamp;
783 frag_len1 = asf->packet_size_left -
784 PAYLOAD_HEADER_SIZE_MULTIPLE_PAYLOADS -
785 PACKET_HEADER_MIN_SIZE - 1;
787 if (frag_len1 < payload_len &&
788 avst->codec->codec_type == AVMEDIA_TYPE_AUDIO) {
794 if (payload_len > frag_len1)
795 payload_len = frag_len1;
796 else if (payload_len == (frag_len1 - 1))
797 payload_len = frag_len1 - 2; // additional byte need to put padding length
799 put_payload_header(s, stream, timestamp + PREROLL_TIME,
800 m_obj_size, m_obj_offset, payload_len, flags);
801 avio_write(&asf->pb, buf, payload_len);
803 if (asf->multi_payloads_present)
804 asf->packet_size_left -= (payload_len + PAYLOAD_HEADER_SIZE_MULTIPLE_PAYLOADS);
806 asf->packet_size_left -= (payload_len + PAYLOAD_HEADER_SIZE_SINGLE_PAYLOAD);
807 asf->packet_timestamp_end = timestamp;
809 asf->packet_nb_payloads++;
813 m_obj_offset += payload_len;
816 if (!asf->multi_payloads_present)
818 else if (asf->packet_size_left <= (PAYLOAD_HEADER_SIZE_MULTIPLE_PAYLOADS + PACKET_HEADER_MIN_SIZE + 1))
824 static int update_index(AVFormatContext *s, int start_sec,
825 uint32_t packet_number, uint16_t packet_count,
826 uint64_t packet_offset)
828 ASFContext *asf = s->priv_data;
830 if (start_sec > asf->next_start_sec) {
833 if (!asf->next_start_sec) {
834 asf->next_packet_number = packet_number;
835 asf->next_packet_count = packet_count;
836 asf->next_packet_offset = packet_offset;
839 if (start_sec > asf->nb_index_memory_alloc) {
841 asf->nb_index_memory_alloc = (start_sec + ASF_INDEX_BLOCK) & ~(ASF_INDEX_BLOCK - 1);
842 if ((err = av_reallocp_array(&asf->index_ptr,
843 asf->nb_index_memory_alloc,
844 sizeof(*asf->index_ptr))) < 0) {
845 asf->nb_index_memory_alloc = 0;
849 for (i = asf->next_start_sec; i < start_sec; i++) {
850 asf->index_ptr[i].packet_number = asf->next_packet_number;
851 asf->index_ptr[i].packet_count = asf->next_packet_count;
852 asf->index_ptr[i].send_time = asf->next_start_sec * INT64_C(10000000);
853 asf->index_ptr[i].offset = asf->next_packet_offset;
857 asf->maximum_packet = FFMAX(asf->maximum_packet, packet_count);
858 asf->next_packet_number = packet_number;
859 asf->next_packet_count = packet_count;
860 asf->next_packet_offset = packet_offset;
861 asf->next_start_sec = start_sec;
866 static int asf_write_packet(AVFormatContext *s, AVPacket *pkt)
868 ASFContext *asf = s->priv_data;
869 AVIOContext *pb = s->pb;
871 AVCodecContext *codec;
872 uint32_t packet_number;
875 int flags = pkt->flags;
877 uint64_t offset = avio_tell(pb);
879 codec = s->streams[pkt->stream_index]->codec;
880 stream = &asf->streams[pkt->stream_index];
882 if (codec->codec_type == AVMEDIA_TYPE_AUDIO)
883 flags &= ~AV_PKT_FLAG_KEY;
885 pts = (pkt->pts != AV_NOPTS_VALUE) ? pkt->pts : pkt->dts;
886 av_assert0(pts != AV_NOPTS_VALUE);
888 asf->duration = FFMAX(asf->duration, pts + pkt->duration * 10000);
890 packet_number = asf->nb_packets;
891 put_frame(s, stream, s->streams[pkt->stream_index],
892 pkt->dts, pkt->data, pkt->size, flags);
894 start_sec = (int)((PREROLL_TIME * 10000 + pts + ASF_INDEXED_INTERVAL - 1)
895 / ASF_INDEXED_INTERVAL);
898 if ((!asf->is_streamed) && (flags & AV_PKT_FLAG_KEY)) {
899 uint16_t packet_count = asf->nb_packets - packet_number;
900 ret = update_index(s, start_sec, packet_number, packet_count, offset);
904 asf->end_sec = start_sec;
909 static int asf_write_index(AVFormatContext *s, ASFIndex *index,
910 uint16_t max, uint32_t count)
912 AVIOContext *pb = s->pb;
915 ff_put_guid(pb, &ff_asf_simple_index_header);
916 avio_wl64(pb, 24 + 16 + 8 + 4 + 4 + (4 + 2) * count);
917 ff_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;
935 /* flush the current packet */
936 if (asf->pb.buf_ptr > asf->pb.buffer)
940 data_size = avio_tell(s->pb);
941 if (!asf->is_streamed && asf->next_start_sec) {
942 if ((ret = update_index(s, asf->end_sec + 1, 0, 0, 0)) < 0)
944 asf_write_index(s, asf->index_ptr, asf->maximum_packet, asf->next_start_sec);
948 if (asf->is_streamed || !s->pb->seekable) {
949 put_chunk(s, 0x4524, 0, 0); /* end of stream */
951 /* rewrite an updated header */
952 file_size = avio_tell(s->pb);
953 avio_seek(s->pb, 0, SEEK_SET);
954 asf_write_header1(s, file_size, data_size - asf->data_offset);
957 av_freep(&asf->index_ptr);
962 AVOutputFormat ff_asf_muxer = {
964 .long_name = NULL_IF_CONFIG_SMALL("ASF (Advanced / Active Streaming Format)"),
965 .mime_type = "video/x-ms-asf",
966 .extensions = "asf,wmv,wma",
967 .priv_data_size = sizeof(ASFContext),
968 .audio_codec = AV_CODEC_ID_WMAV2,
969 .video_codec = AV_CODEC_ID_MSMPEG4V3,
970 .write_header = asf_write_header,
971 .write_packet = asf_write_packet,
972 .write_trailer = asf_write_trailer,
973 .flags = AVFMT_GLOBALHEADER,
974 .codec_tag = (const AVCodecTag * const []) {
975 codec_asf_bmp_tags, ff_codec_bmp_tags, ff_codec_wav_tags, 0
978 #endif /* CONFIG_ASF_MUXER */
980 #if CONFIG_ASF_STREAM_MUXER
981 AVOutputFormat ff_asf_stream_muxer = {
982 .name = "asf_stream",
983 .long_name = NULL_IF_CONFIG_SMALL("ASF (Advanced / Active Streaming Format)"),
984 .mime_type = "video/x-ms-asf",
985 .extensions = "asf,wmv,wma",
986 .priv_data_size = sizeof(ASFContext),
987 .audio_codec = AV_CODEC_ID_WMAV2,
988 .video_codec = AV_CODEC_ID_MSMPEG4V3,
989 .write_header = asf_write_stream_header,
990 .write_packet = asf_write_packet,
991 .write_trailer = asf_write_trailer,
992 .flags = AVFMT_GLOBALHEADER,
993 .codec_tag = (const AVCodecTag * const []) {
994 codec_asf_bmp_tags, ff_codec_bmp_tags, ff_codec_wav_tags, 0
997 #endif /* CONFIG_ASF_STREAM_MUXER */