2 * ASF compatible encoder and decoder.
3 * Copyright (c) 2000, 2001 Fabrice Bellard.
5 * This library is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU Lesser General Public
7 * License as published by the Free Software Foundation; either
8 * version 2 of the License, or (at your option) any later version.
10 * This library is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * Lesser General Public License for more details.
15 * You should have received a copy of the GNU Lesser General Public
16 * License along with this library; if not, write to the Free Software
17 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
22 #include "mpegaudio.h"
24 #define PACKET_SIZE 3200
25 #define PACKET_HEADER_SIZE 12
26 #define FRAME_HEADER_SIZE 17
38 int ds_span; /* descrambling */
53 typedef struct __attribute__((packed)) {
54 GUID guid; // generated by client computer
55 uint64_t file_size; // in bytes
56 // invalid if broadcasting
57 uint64_t create_time; // time of creation, in 100-nanosecond units since 1.1.1601
58 // invalid if broadcasting
59 uint64_t packets_count; // how many packets are there in the file
60 // invalid if broadcasting
61 uint64_t play_time; // play time, in 100-nanosecond units
62 // invalid if broadcasting
63 uint64_t send_time; // time to send file, in 100-nanosecond units
64 // invalid if broadcasting (could be ignored)
65 uint32_t preroll; // timestamp of the first packet, in milliseconds
66 // if nonzero - substract from time
67 uint32_t ignore; // preroll is 64bit - but let's just ignore it
68 uint32_t flags; // 0x01 - broadcast
70 // rest is reserved should be 0
71 uint32_t min_pktsize; // size of a data packet
72 // invalid if broadcasting
73 uint32_t max_pktsize; // shall be the same as for min_pktsize
74 // invalid if broadcasting
75 uint32_t max_bitrate; // bandwith of stream in bps
76 // should be the sum of bitrates of the
77 // individual media streams
86 ASFStream streams[128]; // it's max number
87 /* non streamed additonnal info */
89 INT64 duration; /* in 100ns units */
92 int packet_timestamp_start;
93 int packet_timestamp_end;
95 UINT8 packet_buf[PACKET_SIZE];
97 /* only for reading */
98 uint64_t data_offset; /* begining of the first data packet */
104 int packet_timestamp;
105 int packet_segsizetype;
108 int packet_replic_size;
109 int packet_key_frame;
111 int packet_frag_offset;
112 int packet_frag_size;
113 int packet_frag_timestamp;
115 int packet_time_delta;
116 int packet_time_start;
119 ASFStream* asf_st; /* currently decoded stream */
122 static const GUID asf_header = {
123 0x75B22630, 0x668E, 0x11CF, { 0xA6, 0xD9, 0x00, 0xAA, 0x00, 0x62, 0xCE, 0x6C },
126 static const GUID file_header = {
127 0x8CABDCA1, 0xA947, 0x11CF, { 0x8E, 0xE4, 0x00, 0xC0, 0x0C, 0x20, 0x53, 0x65 },
130 static const GUID stream_header = {
131 0xB7DC0791, 0xA9B7, 0x11CF, { 0x8E, 0xE6, 0x00, 0xC0, 0x0C, 0x20, 0x53, 0x65 },
134 static const GUID audio_stream = {
135 0xF8699E40, 0x5B4D, 0x11CF, { 0xA8, 0xFD, 0x00, 0x80, 0x5F, 0x5C, 0x44, 0x2B },
138 static const GUID audio_conceal_none = {
139 // 0x49f1a440, 0x4ece, 0x11d0, { 0xa3, 0xac, 0x00, 0xa0, 0xc9, 0x03, 0x48, 0xf6 },
140 // New value lifted from avifile
141 0x20fb5700, 0x5b55, 0x11cf, { 0xa8, 0xfd, 0x00, 0x80, 0x5f, 0x5c, 0x44, 0x2b },
144 static const GUID video_stream = {
145 0xBC19EFC0, 0x5B4D, 0x11CF, { 0xA8, 0xFD, 0x00, 0x80, 0x5F, 0x5C, 0x44, 0x2B },
148 static const GUID video_conceal_none = {
149 0x20FB5700, 0x5B55, 0x11CF, { 0xA8, 0xFD, 0x00, 0x80, 0x5F, 0x5C, 0x44, 0x2B },
153 static const GUID comment_header = {
154 0x75b22633, 0x668e, 0x11cf, { 0xa6, 0xd9, 0x00, 0xaa, 0x00, 0x62, 0xce, 0x6c },
157 static const GUID codec_comment_header = {
158 0x86D15240, 0x311D, 0x11D0, { 0xA3, 0xA4, 0x00, 0xA0, 0xC9, 0x03, 0x48, 0xF6 },
160 static const GUID codec_comment1_header = {
161 0x86d15241, 0x311d, 0x11d0, { 0xa3, 0xa4, 0x00, 0xa0, 0xc9, 0x03, 0x48, 0xf6 },
164 static const GUID data_header = {
165 0x75b22636, 0x668e, 0x11cf, { 0xa6, 0xd9, 0x00, 0xaa, 0x00, 0x62, 0xce, 0x6c },
168 static const GUID index_guid = {
169 0x33000890, 0xe5b1, 0x11cf, { 0x89, 0xf4, 0x00, 0xa0, 0xc9, 0x03, 0x49, 0xcb },
172 static const GUID head1_guid = {
173 0x5fbf03b5, 0xa92e, 0x11cf, { 0x8e, 0xe3, 0x00, 0xc0, 0x0c, 0x20, 0x53, 0x65 },
176 static const GUID head2_guid = {
177 0xabd3d211, 0xa9ba, 0x11cf, { 0x8e, 0xe6, 0x00, 0xc0, 0x0c, 0x20, 0x53, 0x65 },
180 /* I am not a number !!! This GUID is the one found on the PC used to
181 generate the stream */
182 static const GUID my_guid = {
183 0, 0, 0, { 0, 0, 0, 0, 0, 0, 0, 0 },
186 CodecTag codec_asf_bmp_tags[] = {
187 { CODEC_ID_H263, MKTAG('H', '2', '6', '3') },
188 { CODEC_ID_H263P, MKTAG('H', '2', '6', '3') },
189 { CODEC_ID_H263I, MKTAG('I', '2', '6', '3') }, /* intel h263 */
190 { CODEC_ID_MJPEG, MKTAG('M', 'J', 'P', 'G') },
191 { CODEC_ID_MPEG4, MKTAG('D', 'I', 'V', 'X') },
192 { CODEC_ID_MPEG4, MKTAG('d', 'i', 'v', 'x') },
193 { CODEC_ID_MPEG4, MKTAG('D', 'X', '5', '0') },
194 { CODEC_ID_MPEG4, MKTAG('X', 'V', 'I', 'D') },
195 { CODEC_ID_MPEG4, MKTAG('x', 'v', 'i', 'd') },
196 { CODEC_ID_MPEG4, MKTAG('m', 'p', '4', 's') },
197 { CODEC_ID_MPEG4, MKTAG('M', 'P', '4', 'S') },
198 { CODEC_ID_MPEG4, MKTAG('M', '4', 'S', '2') },
199 { CODEC_ID_MPEG4, MKTAG('m', '4', 's', '2') },
200 { CODEC_ID_MPEG4, MKTAG(0x04, 0, 0, 0) }, /* some broken avi use this */
201 { CODEC_ID_MSMPEG4V3, MKTAG('M', 'P', '4', '3') }, /* default signature when using MSMPEG4 */
202 { CODEC_ID_MSMPEG4V3, MKTAG('D', 'I', 'V', '3') },
203 { CODEC_ID_MSMPEG4V2, MKTAG('M', 'P', '4', '2') },
204 { CODEC_ID_MSMPEG4V1, MKTAG('M', 'P', 'G', '4') },
205 { CODEC_ID_WMV1, MKTAG('W', 'M', 'V', '1') },
211 static void put_guid(ByteIOContext *s, const GUID *g)
219 put_byte(s, g->v4[i]);
222 static void put_str16(ByteIOContext *s, const char *tag)
226 put_le16(s,strlen(tag) + 1);
235 static void put_str16_nolen(ByteIOContext *s, const char *tag)
247 static INT64 put_header(ByteIOContext *pb, const GUID *g)
257 /* update header size */
258 static void end_header(ByteIOContext *pb, INT64 pos)
262 pos1 = url_ftell(pb);
263 url_fseek(pb, pos + 16, SEEK_SET);
264 put_le64(pb, pos1 - pos);
265 url_fseek(pb, pos1, SEEK_SET);
268 /* write an asf chunk (only used in streaming case) */
269 static void put_chunk(AVFormatContext *s, int type, int payload_length, int flags)
271 ASFContext *asf = s->priv_data;
272 ByteIOContext *pb = &s->pb;
275 length = payload_length + 8;
277 put_le16(pb, length);
278 put_le32(pb, asf->seqno);
279 put_le16(pb, flags); /* unknown bytes */
280 put_le16(pb, length);
284 /* convert from unix to windows time */
285 static INT64 unix_to_file_time(int ti)
289 t = ti * INT64_C(10000000);
290 t += INT64_C(116444736000000000);
294 /* write the header (used two times if non streamed) */
295 static int asf_write_header1(AVFormatContext *s, INT64 file_size, INT64 data_chunk_size)
297 ASFContext *asf = s->priv_data;
298 ByteIOContext *pb = &s->pb;
299 int header_size, n, extra_size, extra_size2, wav_extra_size, file_time;
302 INT64 header_offset, cur_pos, hpos;
305 has_title = (s->title[0] || s->author[0] || s->copyright[0] || s->comment[0]);
308 for(n=0;n<s->nb_streams;n++) {
309 enc = &s->streams[n]->codec;
311 bit_rate += enc->bit_rate;
314 if (asf->is_streamed) {
315 put_chunk(s, 0x4824, 0, 0xc00); /* start of stream (length will be patched later) */
318 put_guid(pb, &asf_header);
319 put_le64(pb, -1); /* header length, will be patched after */
320 put_le32(pb, 3 + has_title + s->nb_streams); /* number of chunks in header */
321 put_byte(pb, 1); /* ??? */
322 put_byte(pb, 2); /* ??? */
325 header_offset = url_ftell(pb);
326 hpos = put_header(pb, &file_header);
327 put_guid(pb, &my_guid);
328 put_le64(pb, file_size);
330 put_le64(pb, unix_to_file_time(file_time));
331 put_le64(pb, asf->nb_packets); /* number of packets */
332 put_le64(pb, asf->duration); /* end time stamp (in 100ns units) */
333 put_le64(pb, asf->duration); /* duration (in 100ns units) */
334 put_le32(pb, 0); /* start time stamp */
335 put_le32(pb, 0); /* ??? */
336 put_le32(pb, asf->is_streamed ? 1 : 0); /* ??? */
337 put_le32(pb, asf->packet_size); /* packet size */
338 put_le32(pb, asf->packet_size); /* packet size */
339 put_le32(pb, bit_rate); /* Nominal data rate in bps */
340 end_header(pb, hpos);
342 /* unknown headers */
343 hpos = put_header(pb, &head1_guid);
344 put_guid(pb, &head2_guid);
347 end_header(pb, hpos);
349 /* title and other infos */
351 hpos = put_header(pb, &comment_header);
352 put_le16(pb, 2 * (strlen(s->title) + 1));
353 put_le16(pb, 2 * (strlen(s->author) + 1));
354 put_le16(pb, 2 * (strlen(s->copyright) + 1));
355 put_le16(pb, 2 * (strlen(s->comment) + 1));
357 put_str16_nolen(pb, s->title);
358 put_str16_nolen(pb, s->author);
359 put_str16_nolen(pb, s->copyright);
360 put_str16_nolen(pb, s->comment);
361 end_header(pb, hpos);
365 for(n=0;n<s->nb_streams;n++) {
367 ASFStream *stream = &asf->streams[n];
369 enc = &s->streams[n]->codec;
370 asf->streams[n].num = n + 1;
371 asf->streams[n].seq = 0;
373 switch(enc->codec_type) {
374 case CODEC_TYPE_AUDIO:
376 extra_size = 18 + wav_extra_size;
378 /* Init the ticker */
379 ticker_init(&stream->pts_ticker,
381 1000 * enc->frame_size);
384 case CODEC_TYPE_VIDEO:
388 /* Init the ticker */
389 ticker_init(&stream->pts_ticker,
391 1000 * FRAME_RATE_BASE);
395 hpos = put_header(pb, &stream_header);
396 if (enc->codec_type == CODEC_TYPE_AUDIO) {
397 put_guid(pb, &audio_stream);
398 put_guid(pb, &audio_conceal_none);
400 put_guid(pb, &video_stream);
401 put_guid(pb, &video_conceal_none);
403 put_le64(pb, 0); /* ??? */
404 es_pos = url_ftell(pb);
405 put_le32(pb, extra_size); /* wav header len */
406 put_le32(pb, extra_size2); /* additional data len */
407 put_le16(pb, n + 1); /* stream number */
408 put_le32(pb, 0); /* ??? */
410 if (enc->codec_type == CODEC_TYPE_AUDIO) {
411 /* WAVEFORMATEX header */
412 int wavsize = put_wav_header(pb, enc);
416 if (wavsize != extra_size) {
417 cur_pos = url_ftell(pb);
418 url_fseek(pb, es_pos, SEEK_SET);
419 put_le32(pb, wavsize); /* wav header len */
420 url_fseek(pb, cur_pos, SEEK_SET);
423 put_le32(pb, enc->width);
424 put_le32(pb, enc->height);
425 put_byte(pb, 2); /* ??? */
426 put_le16(pb, 40); /* size */
428 /* BITMAPINFOHEADER header */
429 put_bmp_header(pb, enc, codec_asf_bmp_tags);
431 end_header(pb, hpos);
436 hpos = put_header(pb, &codec_comment_header);
437 put_guid(pb, &codec_comment1_header);
438 put_le32(pb, s->nb_streams);
439 for(n=0;n<s->nb_streams;n++) {
442 enc = &s->streams[n]->codec;
443 p = avcodec_find_encoder(enc->codec_id);
445 put_le16(pb, asf->streams[n].num);
446 put_str16(pb, p ? p->name : enc->codec_name);
447 put_le16(pb, 0); /* no parameters */
449 if (enc->codec_type == CODEC_TYPE_AUDIO) {
451 put_le16(pb, codec_get_tag(codec_wav_tags, enc->codec_id));
454 put_le32(pb, codec_get_tag(codec_asf_bmp_tags, enc->codec_id));
457 end_header(pb, hpos);
459 /* patch the header size fields */
461 cur_pos = url_ftell(pb);
462 header_size = cur_pos - header_offset;
463 if (asf->is_streamed) {
464 header_size += 8 + 30 + 50;
466 url_fseek(pb, header_offset - 10 - 30, SEEK_SET);
467 put_le16(pb, header_size);
468 url_fseek(pb, header_offset - 2 - 30, SEEK_SET);
469 put_le16(pb, header_size);
471 header_size -= 8 + 30 + 50;
473 header_size += 24 + 6;
474 url_fseek(pb, header_offset - 14, SEEK_SET);
475 put_le64(pb, header_size);
476 url_fseek(pb, cur_pos, SEEK_SET);
478 /* movie chunk, followed by packets of packet_size */
479 asf->data_offset = cur_pos;
480 put_guid(pb, &data_header);
481 put_le64(pb, data_chunk_size);
482 put_guid(pb, &my_guid);
483 put_le64(pb, asf->nb_packets); /* nb packets */
484 put_byte(pb, 1); /* ??? */
485 put_byte(pb, 1); /* ??? */
489 static int asf_write_header(AVFormatContext *s)
491 ASFContext *asf = s->priv_data;
493 asf->packet_size = PACKET_SIZE;
496 if (asf_write_header1(s, 0, 50) < 0) {
501 put_flush_packet(&s->pb);
503 asf->packet_nb_frames = 0;
504 asf->packet_timestamp_start = -1;
505 asf->packet_timestamp_end = -1;
506 asf->packet_size_left = asf->packet_size - PACKET_HEADER_SIZE;
507 init_put_byte(&asf->pb, asf->packet_buf, asf->packet_size, 1,
508 NULL, NULL, NULL, NULL);
513 static int asf_write_stream_header(AVFormatContext *s)
515 ASFContext *asf = s->priv_data;
517 asf->is_streamed = 1;
519 return asf_write_header(s);
522 /* write a fixed size packet */
523 static int put_packet(AVFormatContext *s,
524 unsigned int timestamp, unsigned int duration,
525 int nb_frames, int padsize)
527 ASFContext *asf = s->priv_data;
528 ByteIOContext *pb = &s->pb;
531 if (asf->is_streamed) {
532 put_chunk(s, 0x4424, asf->packet_size, 0);
538 flags = 0x01; /* nb segments present */
545 put_byte(pb, flags); /* flags */
548 put_le16(pb, padsize - 2);
550 put_byte(pb, padsize - 1);
551 put_le32(pb, timestamp);
552 put_le16(pb, duration);
553 put_byte(pb, nb_frames | 0x80);
555 return PACKET_HEADER_SIZE + ((flags & 0x18) >> 3);
558 static void flush_packet(AVFormatContext *s)
560 ASFContext *asf = s->priv_data;
563 hdr_size = put_packet(s, asf->packet_timestamp_start,
564 asf->packet_timestamp_end - asf->packet_timestamp_start,
565 asf->packet_nb_frames, asf->packet_size_left);
567 /* Clear out the padding bytes */
568 ptr = asf->packet_size - hdr_size - asf->packet_size_left;
569 memset(asf->packet_buf + ptr, 0, asf->packet_size_left);
571 put_buffer(&s->pb, asf->packet_buf, asf->packet_size - hdr_size);
573 put_flush_packet(&s->pb);
575 asf->packet_nb_frames = 0;
576 asf->packet_timestamp_start = -1;
577 asf->packet_timestamp_end = -1;
578 asf->packet_size_left = asf->packet_size - PACKET_HEADER_SIZE;
579 init_put_byte(&asf->pb, asf->packet_buf, asf->packet_size, 1,
580 NULL, NULL, NULL, NULL);
583 static void put_frame_header(AVFormatContext *s, ASFStream *stream, int timestamp,
584 int payload_size, int frag_offset, int frag_len)
586 ASFContext *asf = s->priv_data;
587 ByteIOContext *pb = &asf->pb;
591 if (s->streams[val - 1]->codec.key_frame /* && frag_offset == 0 */)
594 put_byte(pb, stream->seq);
595 put_le32(pb, frag_offset); /* fragment offset */
596 put_byte(pb, 0x08); /* flags */
597 put_le32(pb, payload_size);
598 put_le32(pb, timestamp);
599 put_le16(pb, frag_len);
603 /* Output a frame. We suppose that payload_size <= PACKET_SIZE.
605 It is there that you understand that the ASF format is really
606 crap. They have misread the MPEG Systems spec !
608 static void put_frame(AVFormatContext *s, ASFStream *stream, int timestamp,
609 UINT8 *buf, int payload_size)
611 ASFContext *asf = s->priv_data;
612 int frag_pos, frag_len, frag_len1;
615 while (frag_pos < payload_size) {
616 frag_len = payload_size - frag_pos;
617 frag_len1 = asf->packet_size_left - FRAME_HEADER_SIZE;
619 if (frag_len > frag_len1)
620 frag_len = frag_len1;
621 put_frame_header(s, stream, timestamp, payload_size, frag_pos, frag_len);
622 put_buffer(&asf->pb, buf, frag_len);
623 asf->packet_size_left -= (frag_len + FRAME_HEADER_SIZE);
624 asf->packet_timestamp_end = timestamp;
625 if (asf->packet_timestamp_start == -1)
626 asf->packet_timestamp_start = timestamp;
627 asf->packet_nb_frames++;
631 frag_pos += frag_len;
633 /* output the frame if filled */
634 if (asf->packet_size_left <= FRAME_HEADER_SIZE)
641 static int asf_write_packet(AVFormatContext *s, int stream_index,
642 UINT8 *buf, int size, int force_pts)
644 ASFContext *asf = s->priv_data;
648 AVCodecContext *codec;
650 stream = &asf->streams[stream_index];
651 codec = &s->streams[stream_index]->codec;
652 stream = &asf->streams[stream_index];
654 if (codec->codec_type == CODEC_TYPE_AUDIO) {
655 timestamp = (int)ticker_abs(&stream->pts_ticker, codec->frame_number);
656 duration = (codec->frame_number * codec->frame_size * INT64_C(10000000)) /
659 timestamp = (int)ticker_abs(&stream->pts_ticker, codec->frame_number);
660 duration = codec->frame_number *
661 ((INT64_C(10000000) * FRAME_RATE_BASE) / codec->frame_rate);
663 if (duration > asf->duration)
664 asf->duration = duration;
666 put_frame(s, stream, timestamp, buf, size);
670 static int asf_write_trailer(AVFormatContext *s)
672 ASFContext *asf = s->priv_data;
675 /* flush the current packet */
676 if (asf->pb.buf_ptr > asf->pb.buffer)
679 if (asf->is_streamed) {
680 put_chunk(s, 0x4524, 0, 0); /* end of stream */
682 /* rewrite an updated header */
683 file_size = url_ftell(&s->pb);
684 url_fseek(&s->pb, 0, SEEK_SET);
685 asf_write_header1(s, file_size, file_size - asf->data_offset);
688 put_flush_packet(&s->pb);
692 /**********************************/
698 static void print_guid(const GUID *g)
701 printf("0x%08x, 0x%04x, 0x%04x, {", g->v1, g->v2, g->v3);
703 printf(" 0x%02x,", g->v4[i]);
708 static void get_guid(ByteIOContext *s, GUID *g)
716 g->v4[i] = get_byte(s);
720 static void get_str16(ByteIOContext *pb, char *buf, int buf_size)
729 if ((q - buf) < buf_size - 1)
737 static void get_str16_nolen(ByteIOContext *pb, int len, char *buf, int buf_size)
745 if ((q - buf) < buf_size - 1)
752 static int asf_probe(AVProbeData *pd)
755 const unsigned char *p;
758 /* check file header */
759 if (pd->buf_size <= 32)
762 g.v1 = p[0] | (p[1] << 8) | (p[2] << 16) | (p[3] << 24);
764 g.v2 = p[0] | (p[1] << 8);
766 g.v3 = p[0] | (p[1] << 8);
771 if (!memcmp(&g, &asf_header, sizeof(GUID)))
772 return AVPROBE_SCORE_MAX;
777 static int asf_read_header(AVFormatContext *s, AVFormatParameters *ap)
779 ASFContext *asf = s->priv_data;
781 ByteIOContext *pb = &s->pb;
788 if (memcmp(&g, &asf_header, sizeof(GUID)))
797 gsize = get_le64(pb);
799 printf("%08Lx: ", url_ftell(pb) - 24);
801 printf(" size=0x%Lx\n", gsize);
805 if (!memcmp(&g, &file_header, sizeof(GUID))) {
806 get_guid(pb, &asf->hdr.guid);
807 asf->hdr.file_size = get_le64(pb);
808 asf->hdr.create_time = get_le64(pb);
809 asf->hdr.packets_count = get_le64(pb);
810 asf->hdr.play_time = get_le64(pb);
811 asf->hdr.send_time = get_le64(pb);
812 asf->hdr.preroll = get_le32(pb);
813 asf->hdr.ignore = get_le32(pb);
814 asf->hdr.flags = get_le32(pb);
815 asf->hdr.min_pktsize = get_le32(pb);
816 asf->hdr.max_pktsize = get_le32(pb);
817 asf->hdr.max_bitrate = get_le32(pb);
818 asf->packet_size = asf->hdr.max_pktsize;
819 } else if (!memcmp(&g, &stream_header, sizeof(GUID))) {
820 int type, id, total_size;
824 pos1 = url_ftell(pb);
826 st = av_mallocz(sizeof(AVStream));
829 s->streams[s->nb_streams] = st;
830 asf_st = av_mallocz(sizeof(ASFStream));
833 st->priv_data = asf_st;
834 st->time_length = (asf->hdr.send_time - asf->hdr.preroll) / 10000;
836 if (!memcmp(&g, &audio_stream, sizeof(GUID))) {
837 type = CODEC_TYPE_AUDIO;
838 } else if (!memcmp(&g, &video_stream, sizeof(GUID))) {
839 type = CODEC_TYPE_VIDEO;
844 total_size = get_le64(pb);
847 st->id = get_le16(pb) & 0x7f; /* stream id */
848 // mapping of asf ID to AV stream ID;
849 asf->asfid2avid[st->id] = s->nb_streams++;
852 st->codec.codec_type = type;
853 if (type == CODEC_TYPE_AUDIO) {
855 st->codec.codec_tag = id;
856 st->codec.channels = get_le16(pb);
857 st->codec.sample_rate = get_le32(pb);
858 st->codec.bit_rate = get_le32(pb) * 8;
859 st->codec.block_align = get_le16(pb); /* block align */
860 bps = get_le16(pb); /* bits per sample */
861 st->codec.codec_id = wav_codec_get_id(id, bps);
863 st->extra_data = av_mallocz(size);
864 get_buffer(pb, st->extra_data, size);
865 st->extra_data_size = size;
866 /* We have to init the frame size at some point .... */
867 pos2 = url_ftell(pb);
868 if (gsize > (pos2 + 8 - pos1 + 24))
870 asf_st->ds_span = get_byte(pb);
871 asf_st->ds_packet_size = get_le16(pb);
872 asf_st->ds_chunk_size = get_le16(pb);
873 asf_st->ds_data_size = get_le16(pb);
874 asf_st->ds_silence_data = get_byte(pb);
876 //printf("Descrambling: ps:%d cs:%d ds:%d s:%d sd:%d\n",
877 // asf_st->ds_packet_size, asf_st->ds_chunk_size,
878 // asf_st->ds_data_size, asf_st->ds_span, asf_st->ds_silence_data);
879 if (asf_st->ds_span > 1)
881 if (!asf_st->ds_chunk_size
882 || (asf_st->ds_packet_size/asf_st->ds_chunk_size <= 1))
883 asf_st->ds_span = 0; // disable descrambling
885 switch (st->codec.codec_id) {
886 case CODEC_ID_MP3LAME:
887 st->codec.frame_size = MPA_FRAME_SIZE;
889 case CODEC_ID_PCM_S16LE:
890 case CODEC_ID_PCM_S16BE:
891 case CODEC_ID_PCM_U16LE:
892 case CODEC_ID_PCM_U16BE:
893 case CODEC_ID_PCM_S8:
894 case CODEC_ID_PCM_U8:
895 case CODEC_ID_PCM_ALAW:
896 case CODEC_ID_PCM_MULAW:
897 st->codec.frame_size = 1;
900 /* This is probably wrong, but it prevents a crash later */
901 st->codec.frame_size = 1;
908 size = get_le16(pb); /* size */
909 get_le32(pb); /* size */
910 st->codec.width = get_le32(pb);
911 st->codec.height = get_le32(pb);
912 /* not available for asf */
913 st->codec.frame_rate = 25 * FRAME_RATE_BASE; /* XXX: find it */
914 get_le16(pb); /* panes */
915 get_le16(pb); /* depth */
917 st->codec.codec_tag = tag1;
918 st->codec.codec_id = codec_get_id(codec_asf_bmp_tags, tag1);
919 url_fskip(pb, size - 5 * 4);
921 pos2 = url_ftell(pb);
922 url_fskip(pb, gsize - (pos2 - pos1 + 24));
923 } else if (!memcmp(&g, &data_header, sizeof(GUID))) {
925 } else if (!memcmp(&g, &comment_header, sizeof(GUID))) {
926 int len1, len2, len3, len4, len5;
933 get_str16_nolen(pb, len1, s->title, sizeof(s->title));
934 get_str16_nolen(pb, len2, s->author, sizeof(s->author));
935 get_str16_nolen(pb, len3, s->copyright, sizeof(s->copyright));
936 get_str16_nolen(pb, len4, s->comment, sizeof(s->comment));
939 } else if (!memcmp(&g, &head1_guid, sizeof(GUID))) {
944 } else if (!memcmp(&g, &codec_comment_header, sizeof(GUID))) {
954 num = get_le16(pb); /* stream number */
955 get_str16(pb, str, sizeof(str));
956 get_str16(pb, str, sizeof(str));
961 if ((q - tag) < sizeof(tag) - 1)
968 } else if (url_feof(pb)) {
971 url_fseek(pb, gsize - 24, SEEK_CUR);
979 asf->packet_size_left = 0;
984 for(i=0;i<s->nb_streams;i++) {
985 AVStream *st = s->streams[i];
987 av_free(st->priv_data);
994 #define DO_2BITS(bits, var, defval) \
997 case 3: var = get_le32(pb); rsize += 4; break; \
998 case 2: var = get_le16(pb); rsize += 2; break; \
999 case 1: var = get_byte(pb); rsize++; break; \
1000 default: var = defval; break; \
1003 static int asf_get_packet(AVFormatContext *s)
1005 ASFContext *asf = s->priv_data;
1006 ByteIOContext *pb = &s->pb;
1007 uint32_t packet_length, padsize;
1009 int c = get_byte(pb);
1012 printf("BAD HRD %x at:%Ld\n", c, url_ftell(pb));
1015 if ((c & 0x0f) == 2) { // always true for now
1016 if (get_le16(pb) != 0)
1018 printf("BAD NO ZERO\n");
1023 asf->packet_flags = get_byte(pb);
1024 asf->packet_property = get_byte(pb);
1026 DO_2BITS(asf->packet_flags >> 5, packet_length, asf->packet_size);
1027 DO_2BITS(asf->packet_flags >> 1, padsize, 0); // sequence ignored
1028 DO_2BITS(asf->packet_flags >> 3, padsize, 0); // padding length
1030 asf->packet_timestamp = get_le32(pb);
1031 get_le16(pb); /* duration */
1032 // rsize has 11 bytes static bytes which have to be present
1034 if (asf->packet_flags & 0x01) {
1035 asf->packet_segsizetype = get_byte(pb); rsize++;
1036 asf->packet_segments = asf->packet_segsizetype & 0x3f;
1038 asf->packet_segments = 1;
1039 asf->packet_segsizetype = 0x80;
1041 asf->packet_size_left = packet_length - padsize - rsize;
1042 asf->packet_padsize = padsize;
1044 printf("packet: size=%d padsize=%d left=%d\n", asf->packet_size, asf->packet_padsize, asf->packet_size_left);
1049 static int asf_read_packet(AVFormatContext *s, AVPacket *pkt)
1051 ASFContext *asf = s->priv_data;
1052 ASFStream *asf_st = 0;
1053 ByteIOContext *pb = &s->pb;
1057 if (asf->packet_size_left < FRAME_HEADER_SIZE) {
1058 //asf->packet_size_left <= asf->packet_padsize) {
1060 //printf("PACKETLEFTSIZE %d\n", asf->packet_size_left);
1062 if (asf->packet_size_left)
1063 url_fskip(pb, asf->packet_size_left);
1064 if (asf->packet_padsize)
1065 url_fskip(pb, asf->packet_padsize);
1066 ret = asf_get_packet(s);
1067 //printf("READ ASF PACKET %d r:%d c:%d\n", ret, asf->packet_size_left, pc++);
1072 if (1) { // FIXME - handle replicated multi packets
1073 /* read frame header */
1074 int num = get_byte(pb);
1076 asf->packet_key_frame = (num & 0x80) >> 7;
1077 asf->stream_index = asf->asfid2avid[num & 0x7f];
1078 if (asf->stream_index < 0)
1080 /* unhandled packet (should not happen) */
1081 url_fskip(pb, asf->packet_frag_size);
1082 asf->packet_size_left -= asf->packet_frag_size;
1083 //printf("#####xxxxxx###### skip %d\n", asf->packet_frag_size);
1087 asf->asf_st = s->streams[asf->stream_index]->priv_data;
1088 //printf("ASFST %p %d <> %d\n", asf->asf_st, asf->stream_index, num & 0x7f);
1089 // sequence should be ignored!
1090 DO_2BITS(asf->packet_property >> 4, asf->packet_seq, 0);
1091 DO_2BITS(asf->packet_property >> 2, asf->packet_frag_offset, 0);
1092 DO_2BITS(asf->packet_property, asf->packet_replic_size, 0);
1094 if (asf->packet_replic_size > 1) {
1095 // it should be always at least 8 bytes - FIXME validate
1096 asf->packet_obj_size = get_le32(pb);
1097 asf->packet_frag_timestamp = get_le32(pb); // timestamp
1098 rsize += asf->packet_replic_size; // FIXME - check validity
1100 // multipacket - frag_offset is beginig timestamp
1101 asf->packet_time_start = asf->packet_frag_offset;
1102 asf->packet_frag_offset = 0;
1103 asf->packet_frag_timestamp = asf->packet_timestamp;
1104 if (asf->packet_replic_size == 1) {
1105 asf->packet_time_delta = get_byte(pb);
1110 if (asf->packet_flags & 0x01) {
1111 DO_2BITS(asf->packet_segsizetype >> 6, asf->packet_frag_size, 0); // 0 is illegal
1112 //printf("Fragsize %d\n", asf->packet_frag_size);
1114 asf->packet_frag_size = asf->packet_size_left - rsize;
1115 //printf("Using rest %d %d %d\n", asf->packet_frag_size, asf->packet_size_left, rsize);
1118 asf->packet_size_left -= rsize;
1119 //printf("___objsize____ %d %d rs:%d\n", asf->packet_obj_size, asf->packet_frag_offset, rsize);
1121 asf_st = asf->asf_st;
1123 if ((asf->packet_frag_offset != asf_st->frag_offset
1124 || (asf->packet_frag_offset
1125 && asf->packet_seq != asf_st->seq)) // seq should be ignored
1127 /* cannot continue current packet: free it */
1128 // FIXME better check if packet was already allocated
1129 printf("asf parser skips: %d - %d o:%d - %d %d %d fl:%d\n",
1131 asf->packet_obj_size,
1132 asf->packet_frag_offset, asf_st->frag_offset,
1133 asf->packet_seq, asf_st->seq, asf->packet_frag_size);
1134 if (asf_st->pkt.size)
1135 av_free_packet(&asf_st->pkt);
1136 asf_st->frag_offset = 0;
1137 if (asf->packet_frag_offset != 0) {
1138 /* cannot create new packet */
1139 url_fskip(pb, asf->packet_frag_size);
1140 printf("asf parser skiping %db\n", asf->packet_frag_size);
1141 asf->packet_size_left -= asf->packet_frag_size;
1145 if (asf->packet_replic_size == 1)
1147 // frag_size is now begining timestamp
1148 asf->packet_frag_timestamp = asf->packet_time_start;
1149 asf->packet_obj_size = asf->packet_frag_size = get_byte(pb);
1150 asf->packet_size_left--;
1151 //printf("COMPRESS size %d %d\n", asf->packet_obj_size, asf->packet_frag_timestamp);
1154 //printf("PACKET OFFSET %d\n", asf_st->frag_offset);
1155 if (asf_st->frag_offset == 0) {
1157 av_new_packet(&asf_st->pkt, asf->packet_obj_size);
1158 asf_st->seq = asf->packet_seq;
1159 asf_st->pkt.pts = asf->packet_frag_timestamp - asf->hdr.preroll;
1160 asf_st->pkt.stream_index = asf->stream_index;
1161 if (asf->packet_key_frame)
1162 asf_st->pkt.flags |= PKT_FLAG_KEY;
1166 //printf("READ PACKET s:%d os:%d o:%d,%d l:%d DATA:%p\n",
1167 // asf->packet_size, asf_st->pkt.size, asf->packet_frag_offset,
1168 // asf_st->frag_offset, asf->packet_frag_size, asf_st->pkt.data);
1169 get_buffer(pb, asf_st->pkt.data + asf->packet_frag_offset,
1170 asf->packet_frag_size);
1171 asf_st->frag_offset += asf->packet_frag_size;
1172 asf->packet_size_left -= asf->packet_frag_size;
1173 /* test if whole packet is read */
1174 if (asf_st->frag_offset == asf_st->pkt.size) {
1176 if (asf_st->ds_span > 1) {
1177 // descramble packet
1178 char* newdata = av_malloc(asf_st->pkt.size);
1181 while (offset < asf_st->pkt.size) {
1182 int off = offset / asf_st->ds_chunk_size;
1183 int row = off / asf_st->ds_span;
1184 int col = off % asf_st->ds_span;
1185 int idx = row + col * asf_st->ds_packet_size / asf_st->ds_chunk_size;
1186 //printf("off:%d row:%d col:%d idx:%d\n", off, row, col, idx);
1187 memcpy(newdata + offset,
1188 asf_st->pkt.data + idx * asf_st->ds_chunk_size,
1189 asf_st->ds_chunk_size);
1190 offset += asf_st->ds_chunk_size;
1192 av_free(asf_st->pkt.data);
1193 asf_st->pkt.data = newdata;
1197 asf_st->frag_offset = 0;
1198 memcpy(pkt, &asf_st->pkt, sizeof(AVPacket));
1199 //printf("packet %d %d\n", asf_st->pkt.size, asf->packet_frag_size);
1200 asf_st->pkt.size = 0;
1201 asf_st->pkt.data = 0;
1202 // FIXME descrambling
1203 break; // packet completed
1209 static int asf_read_close(AVFormatContext *s)
1211 //ASFContext *asf = s->priv_data;
1214 for(i=0;i<s->nb_streams;i++) {
1215 AVStream *st = s->streams[i];
1216 av_free(st->priv_data);
1222 static int asf_read_seek(AVFormatContext *s, int64_t pts)
1224 printf("SEEK TO %Ld", pts);
1228 AVInputFormat asf_iformat = {
1239 AVOutputFormat asf_oformat = {
1242 "application/octet-stream",
1245 #ifdef CONFIG_MP3LAME
1256 AVOutputFormat asf_stream_oformat = {
1259 "application/octet-stream",
1262 #ifdef CONFIG_MP3LAME
1268 asf_write_stream_header,
1275 av_register_input_format(&asf_iformat);
1276 av_register_output_format(&asf_oformat);
1277 av_register_output_format(&asf_stream_oformat);