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
21 #include "mpegaudio.h"
23 #define PACKET_SIZE 3200
24 #define PACKET_HEADER_SIZE 12
25 #define FRAME_HEADER_SIZE 17
36 int ds_span; /* descrambling */
52 GUID guid; // generated by client computer
53 uint64_t file_size; // in bytes
54 // invalid if broadcasting
55 uint64_t create_time; // time of creation, in 100-nanosecond units since 1.1.1601
56 // invalid if broadcasting
57 uint64_t packets_count; // how many packets are there in the file
58 // invalid if broadcasting
59 uint64_t play_time; // play time, in 100-nanosecond units
60 // invalid if broadcasting
61 uint64_t send_time; // time to send file, in 100-nanosecond units
62 // invalid if broadcasting (could be ignored)
63 uint32_t preroll; // timestamp of the first packet, in milliseconds
64 // if nonzero - substract from time
65 uint32_t ignore; // preroll is 64bit - but let's just ignore it
66 uint32_t flags; // 0x01 - broadcast
68 // rest is reserved should be 0
69 uint32_t min_pktsize; // size of a data packet
70 // invalid if broadcasting
71 uint32_t max_pktsize; // shall be the same as for min_pktsize
72 // invalid if broadcasting
73 uint32_t max_bitrate; // bandwith of stream in bps
74 // should be the sum of bitrates of the
75 // individual media streams
83 int asfid2avid[128]; /* conversion table from asf ID 2 AVStream ID */
84 ASFStream streams[128]; /* it's max number and it's not that big */
85 /* non streamed additonnal info */
87 int64_t duration; /* in 100ns units */
90 int packet_timestamp_start;
91 int packet_timestamp_end;
93 uint8_t packet_buf[PACKET_SIZE];
95 /* only for reading */
96 uint64_t data_offset; /* begining of the first data packet */
102 int packet_timestamp;
103 int packet_segsizetype;
106 int packet_replic_size;
107 int packet_key_frame;
109 int packet_frag_offset;
110 int packet_frag_size;
111 int packet_frag_timestamp;
112 int packet_multi_size;
114 int packet_time_delta;
115 int packet_time_start;
118 ASFStream* asf_st; /* currently decoded stream */
121 static const GUID asf_header = {
122 0x75B22630, 0x668E, 0x11CF, { 0xA6, 0xD9, 0x00, 0xAA, 0x00, 0x62, 0xCE, 0x6C },
125 static const GUID file_header = {
126 0x8CABDCA1, 0xA947, 0x11CF, { 0x8E, 0xE4, 0x00, 0xC0, 0x0C, 0x20, 0x53, 0x65 },
129 static const GUID stream_header = {
130 0xB7DC0791, 0xA9B7, 0x11CF, { 0x8E, 0xE6, 0x00, 0xC0, 0x0C, 0x20, 0x53, 0x65 },
133 static const GUID audio_stream = {
134 0xF8699E40, 0x5B4D, 0x11CF, { 0xA8, 0xFD, 0x00, 0x80, 0x5F, 0x5C, 0x44, 0x2B },
137 static const GUID audio_conceal_none = {
138 // 0x49f1a440, 0x4ece, 0x11d0, { 0xa3, 0xac, 0x00, 0xa0, 0xc9, 0x03, 0x48, 0xf6 },
139 // New value lifted from avifile
140 0x20fb5700, 0x5b55, 0x11cf, { 0xa8, 0xfd, 0x00, 0x80, 0x5f, 0x5c, 0x44, 0x2b },
143 static const GUID video_stream = {
144 0xBC19EFC0, 0x5B4D, 0x11CF, { 0xA8, 0xFD, 0x00, 0x80, 0x5F, 0x5C, 0x44, 0x2B },
147 static const GUID video_conceal_none = {
148 0x20FB5700, 0x5B55, 0x11CF, { 0xA8, 0xFD, 0x00, 0x80, 0x5F, 0x5C, 0x44, 0x2B },
152 static const GUID comment_header = {
153 0x75b22633, 0x668e, 0x11cf, { 0xa6, 0xd9, 0x00, 0xaa, 0x00, 0x62, 0xce, 0x6c },
156 static const GUID codec_comment_header = {
157 0x86D15240, 0x311D, 0x11D0, { 0xA3, 0xA4, 0x00, 0xA0, 0xC9, 0x03, 0x48, 0xF6 },
159 static const GUID codec_comment1_header = {
160 0x86d15241, 0x311d, 0x11d0, { 0xa3, 0xa4, 0x00, 0xa0, 0xc9, 0x03, 0x48, 0xf6 },
163 static const GUID data_header = {
164 0x75b22636, 0x668e, 0x11cf, { 0xa6, 0xd9, 0x00, 0xaa, 0x00, 0x62, 0xce, 0x6c },
167 static const GUID index_guid = {
168 0x33000890, 0xe5b1, 0x11cf, { 0x89, 0xf4, 0x00, 0xa0, 0xc9, 0x03, 0x49, 0xcb },
171 static const GUID head1_guid = {
172 0x5fbf03b5, 0xa92e, 0x11cf, { 0x8e, 0xe3, 0x00, 0xc0, 0x0c, 0x20, 0x53, 0x65 },
175 static const GUID head2_guid = {
176 0xabd3d211, 0xa9ba, 0x11cf, { 0x8e, 0xe6, 0x00, 0xc0, 0x0c, 0x20, 0x53, 0x65 },
179 /* I am not a number !!! This GUID is the one found on the PC used to
180 generate the stream */
181 static const GUID my_guid = {
182 0, 0, 0, { 0, 0, 0, 0, 0, 0, 0, 0 },
185 #ifdef CONFIG_ENCODERS
186 static void put_guid(ByteIOContext *s, const GUID *g)
194 put_byte(s, g->v4[i]);
197 static void put_str16(ByteIOContext *s, const char *tag)
201 put_le16(s,strlen(tag) + 1);
210 static void put_str16_nolen(ByteIOContext *s, const char *tag)
222 static int64_t put_header(ByteIOContext *pb, const GUID *g)
232 /* update header size */
233 static void end_header(ByteIOContext *pb, int64_t pos)
237 pos1 = url_ftell(pb);
238 url_fseek(pb, pos + 16, SEEK_SET);
239 put_le64(pb, pos1 - pos);
240 url_fseek(pb, pos1, SEEK_SET);
243 /* write an asf chunk (only used in streaming case) */
244 static void put_chunk(AVFormatContext *s, int type, int payload_length, int flags)
246 ASFContext *asf = s->priv_data;
247 ByteIOContext *pb = &s->pb;
250 length = payload_length + 8;
252 put_le16(pb, length);
253 put_le32(pb, asf->seqno);
254 put_le16(pb, flags); /* unknown bytes */
255 put_le16(pb, length);
259 /* convert from unix to windows time */
260 static int64_t unix_to_file_time(int ti)
264 t = ti * int64_t_C(10000000);
265 t += int64_t_C(116444736000000000);
269 /* write the header (used two times if non streamed) */
270 static int asf_write_header1(AVFormatContext *s, int64_t file_size, int64_t data_chunk_size)
272 ASFContext *asf = s->priv_data;
273 ByteIOContext *pb = &s->pb;
274 int header_size, n, extra_size, extra_size2, wav_extra_size, file_time;
277 int64_t header_offset, cur_pos, hpos;
280 has_title = (s->title[0] || s->author[0] || s->copyright[0] || s->comment[0]);
283 for(n=0;n<s->nb_streams;n++) {
284 enc = &s->streams[n]->codec;
286 bit_rate += enc->bit_rate;
289 if (asf->is_streamed) {
290 put_chunk(s, 0x4824, 0, 0xc00); /* start of stream (length will be patched later) */
293 put_guid(pb, &asf_header);
294 put_le64(pb, -1); /* header length, will be patched after */
295 put_le32(pb, 3 + has_title + s->nb_streams); /* number of chunks in header */
296 put_byte(pb, 1); /* ??? */
297 put_byte(pb, 2); /* ??? */
300 header_offset = url_ftell(pb);
301 hpos = put_header(pb, &file_header);
302 put_guid(pb, &my_guid);
303 put_le64(pb, file_size);
305 put_le64(pb, unix_to_file_time(file_time));
306 put_le64(pb, asf->nb_packets); /* number of packets */
307 put_le64(pb, asf->duration); /* end time stamp (in 100ns units) */
308 put_le64(pb, asf->duration); /* duration (in 100ns units) */
309 put_le32(pb, 0); /* start time stamp */
310 put_le32(pb, 0); /* ??? */
311 put_le32(pb, asf->is_streamed ? 1 : 0); /* ??? */
312 put_le32(pb, asf->packet_size); /* packet size */
313 put_le32(pb, asf->packet_size); /* packet size */
314 put_le32(pb, bit_rate); /* Nominal data rate in bps */
315 end_header(pb, hpos);
317 /* unknown headers */
318 hpos = put_header(pb, &head1_guid);
319 put_guid(pb, &head2_guid);
322 end_header(pb, hpos);
324 /* title and other infos */
326 hpos = put_header(pb, &comment_header);
327 put_le16(pb, 2 * (strlen(s->title) + 1));
328 put_le16(pb, 2 * (strlen(s->author) + 1));
329 put_le16(pb, 2 * (strlen(s->copyright) + 1));
330 put_le16(pb, 2 * (strlen(s->comment) + 1));
332 put_str16_nolen(pb, s->title);
333 put_str16_nolen(pb, s->author);
334 put_str16_nolen(pb, s->copyright);
335 put_str16_nolen(pb, s->comment);
336 end_header(pb, hpos);
340 for(n=0;n<s->nb_streams;n++) {
342 // ASFStream *stream = &asf->streams[n];
344 enc = &s->streams[n]->codec;
345 asf->streams[n].num = n + 1;
346 asf->streams[n].seq = 0;
348 switch(enc->codec_type) {
349 case CODEC_TYPE_AUDIO:
351 extra_size = 18 + wav_extra_size;
355 case CODEC_TYPE_VIDEO:
362 hpos = put_header(pb, &stream_header);
363 if (enc->codec_type == CODEC_TYPE_AUDIO) {
364 put_guid(pb, &audio_stream);
365 put_guid(pb, &audio_conceal_none);
367 put_guid(pb, &video_stream);
368 put_guid(pb, &video_conceal_none);
370 put_le64(pb, 0); /* ??? */
371 es_pos = url_ftell(pb);
372 put_le32(pb, extra_size); /* wav header len */
373 put_le32(pb, extra_size2); /* additional data len */
374 put_le16(pb, n + 1); /* stream number */
375 put_le32(pb, 0); /* ??? */
377 if (enc->codec_type == CODEC_TYPE_AUDIO) {
378 /* WAVEFORMATEX header */
379 int wavsize = put_wav_header(pb, enc);
383 if (wavsize != extra_size) {
384 cur_pos = url_ftell(pb);
385 url_fseek(pb, es_pos, SEEK_SET);
386 put_le32(pb, wavsize); /* wav header len */
387 url_fseek(pb, cur_pos, SEEK_SET);
390 put_le32(pb, enc->width);
391 put_le32(pb, enc->height);
392 put_byte(pb, 2); /* ??? */
393 put_le16(pb, 40); /* size */
395 /* BITMAPINFOHEADER header */
396 put_bmp_header(pb, enc, codec_bmp_tags, 1);
398 end_header(pb, hpos);
403 hpos = put_header(pb, &codec_comment_header);
404 put_guid(pb, &codec_comment1_header);
405 put_le32(pb, s->nb_streams);
406 for(n=0;n<s->nb_streams;n++) {
409 enc = &s->streams[n]->codec;
410 p = avcodec_find_encoder(enc->codec_id);
412 put_le16(pb, asf->streams[n].num);
413 put_str16(pb, p ? p->name : enc->codec_name);
414 put_le16(pb, 0); /* no parameters */
418 if (enc->codec_type == CODEC_TYPE_AUDIO) {
421 enc->codec_tag = codec_get_tag(codec_wav_tags, enc->codec_id);
424 put_le16(pb, enc->codec_tag);
428 enc->codec_tag = codec_get_tag(codec_bmp_tags, enc->codec_id);
431 put_le32(pb, enc->codec_tag);
434 end_header(pb, hpos);
436 /* patch the header size fields */
438 cur_pos = url_ftell(pb);
439 header_size = cur_pos - header_offset;
440 if (asf->is_streamed) {
441 header_size += 8 + 30 + 50;
443 url_fseek(pb, header_offset - 10 - 30, SEEK_SET);
444 put_le16(pb, header_size);
445 url_fseek(pb, header_offset - 2 - 30, SEEK_SET);
446 put_le16(pb, header_size);
448 header_size -= 8 + 30 + 50;
450 header_size += 24 + 6;
451 url_fseek(pb, header_offset - 14, SEEK_SET);
452 put_le64(pb, header_size);
453 url_fseek(pb, cur_pos, SEEK_SET);
455 /* movie chunk, followed by packets of packet_size */
456 asf->data_offset = cur_pos;
457 put_guid(pb, &data_header);
458 put_le64(pb, data_chunk_size);
459 put_guid(pb, &my_guid);
460 put_le64(pb, asf->nb_packets); /* nb packets */
461 put_byte(pb, 1); /* ??? */
462 put_byte(pb, 1); /* ??? */
466 static int asf_write_header(AVFormatContext *s)
468 ASFContext *asf = s->priv_data;
470 av_set_pts_info(s, 32, 1, 1000); /* 32 bit pts in ms */
472 asf->packet_size = PACKET_SIZE;
475 if (asf_write_header1(s, 0, 50) < 0) {
480 put_flush_packet(&s->pb);
482 asf->packet_nb_frames = 0;
483 asf->packet_timestamp_start = -1;
484 asf->packet_timestamp_end = -1;
485 asf->packet_size_left = asf->packet_size - PACKET_HEADER_SIZE;
486 init_put_byte(&asf->pb, asf->packet_buf, asf->packet_size, 1,
487 NULL, NULL, NULL, NULL);
492 static int asf_write_stream_header(AVFormatContext *s)
494 ASFContext *asf = s->priv_data;
496 asf->is_streamed = 1;
498 return asf_write_header(s);
501 /* write a fixed size packet */
502 static int put_packet(AVFormatContext *s,
503 unsigned int timestamp, unsigned int duration,
504 int nb_frames, int padsize)
506 ASFContext *asf = s->priv_data;
507 ByteIOContext *pb = &s->pb;
510 if (asf->is_streamed) {
511 put_chunk(s, 0x4424, asf->packet_size, 0);
517 flags = 0x01; /* nb segments present */
524 put_byte(pb, flags); /* flags */
527 put_le16(pb, padsize - 2);
529 put_byte(pb, padsize - 1);
530 put_le32(pb, timestamp);
531 put_le16(pb, duration);
532 put_byte(pb, nb_frames | 0x80);
534 return PACKET_HEADER_SIZE + ((flags & 0x18) >> 3);
537 static void flush_packet(AVFormatContext *s)
539 ASFContext *asf = s->priv_data;
542 hdr_size = put_packet(s, asf->packet_timestamp_start,
543 asf->packet_timestamp_end - asf->packet_timestamp_start,
544 asf->packet_nb_frames, asf->packet_size_left);
546 /* Clear out the padding bytes */
547 ptr = asf->packet_size - hdr_size - asf->packet_size_left;
548 memset(asf->packet_buf + ptr, 0, asf->packet_size_left);
550 put_buffer(&s->pb, asf->packet_buf, asf->packet_size - hdr_size);
552 put_flush_packet(&s->pb);
554 asf->packet_nb_frames = 0;
555 asf->packet_timestamp_start = -1;
556 asf->packet_timestamp_end = -1;
557 asf->packet_size_left = asf->packet_size - PACKET_HEADER_SIZE;
558 init_put_byte(&asf->pb, asf->packet_buf, asf->packet_size, 1,
559 NULL, NULL, NULL, NULL);
562 static void put_frame_header(AVFormatContext *s, ASFStream *stream, int timestamp,
563 int payload_size, int frag_offset, int frag_len)
565 ASFContext *asf = s->priv_data;
566 ByteIOContext *pb = &asf->pb;
570 if (s->streams[val - 1]->codec.coded_frame->key_frame /* && frag_offset == 0 */)
573 put_byte(pb, stream->seq);
574 put_le32(pb, frag_offset); /* fragment offset */
575 put_byte(pb, 0x08); /* flags */
576 put_le32(pb, payload_size);
577 put_le32(pb, timestamp);
578 put_le16(pb, frag_len);
582 /* Output a frame. We suppose that payload_size <= PACKET_SIZE.
584 It is there that you understand that the ASF format is really
585 crap. They have misread the MPEG Systems spec !
587 static void put_frame(AVFormatContext *s, ASFStream *stream, int timestamp,
588 const uint8_t *buf, int payload_size)
590 ASFContext *asf = s->priv_data;
591 int frag_pos, frag_len, frag_len1;
594 while (frag_pos < payload_size) {
595 frag_len = payload_size - frag_pos;
596 frag_len1 = asf->packet_size_left - FRAME_HEADER_SIZE;
598 if (frag_len > frag_len1)
599 frag_len = frag_len1;
600 put_frame_header(s, stream, timestamp+1, payload_size, frag_pos, frag_len);
601 put_buffer(&asf->pb, buf, frag_len);
602 asf->packet_size_left -= (frag_len + FRAME_HEADER_SIZE);
603 asf->packet_timestamp_end = timestamp;
604 if (asf->packet_timestamp_start == -1)
605 asf->packet_timestamp_start = timestamp;
606 asf->packet_nb_frames++;
610 frag_pos += frag_len;
612 /* output the frame if filled */
613 if (asf->packet_size_left <= FRAME_HEADER_SIZE)
620 static int asf_write_packet(AVFormatContext *s, int stream_index,
621 const uint8_t *buf, int size, int64_t timestamp)
623 ASFContext *asf = s->priv_data;
626 AVCodecContext *codec;
628 codec = &s->streams[stream_index]->codec;
629 stream = &asf->streams[stream_index];
631 if (codec->codec_type == CODEC_TYPE_AUDIO) {
632 duration = (codec->frame_number * codec->frame_size * int64_t_C(10000000)) /
635 duration = av_rescale(codec->frame_number * codec->frame_rate_base, 10000000, codec->frame_rate);
637 if (duration > asf->duration)
638 asf->duration = duration;
640 put_frame(s, stream, timestamp, buf, size);
644 static int asf_write_trailer(AVFormatContext *s)
646 ASFContext *asf = s->priv_data;
649 /* flush the current packet */
650 if (asf->pb.buf_ptr > asf->pb.buffer)
653 if (asf->is_streamed) {
654 put_chunk(s, 0x4524, 0, 0); /* end of stream */
656 /* rewrite an updated header */
657 file_size = url_ftell(&s->pb);
658 url_fseek(&s->pb, 0, SEEK_SET);
659 asf_write_header1(s, file_size, file_size - asf->data_offset);
662 put_flush_packet(&s->pb);
665 #endif //CONFIG_ENCODERS
667 /**********************************/
673 #define PRINT_IF_GUID(g,cmp) \
674 if (!memcmp(g, &cmp, sizeof(GUID))) \
675 printf("(GUID: %s) ", #cmp)
677 static void print_guid(const GUID *g)
680 PRINT_IF_GUID(g, asf_header);
681 else PRINT_IF_GUID(g, file_header);
682 else PRINT_IF_GUID(g, stream_header);
683 else PRINT_IF_GUID(g, audio_stream);
684 else PRINT_IF_GUID(g, audio_conceal_none);
685 else PRINT_IF_GUID(g, video_stream);
686 else PRINT_IF_GUID(g, video_conceal_none);
687 else PRINT_IF_GUID(g, comment_header);
688 else PRINT_IF_GUID(g, codec_comment_header);
689 else PRINT_IF_GUID(g, codec_comment1_header);
690 else PRINT_IF_GUID(g, data_header);
691 else PRINT_IF_GUID(g, index_guid);
692 else PRINT_IF_GUID(g, head1_guid);
693 else PRINT_IF_GUID(g, head2_guid);
694 else PRINT_IF_GUID(g, my_guid);
696 printf("(GUID: unknown) ");
697 printf("0x%08x, 0x%04x, 0x%04x, {", g->v1, g->v2, g->v3);
699 printf(" 0x%02x,", g->v4[i]);
702 #undef PRINT_IF_GUID(g,cmp)
705 static void get_guid(ByteIOContext *s, GUID *g)
713 g->v4[i] = get_byte(s);
717 static void get_str16(ByteIOContext *pb, char *buf, int buf_size)
726 if ((q - buf) < buf_size - 1)
734 static void get_str16_nolen(ByteIOContext *pb, int len, char *buf, int buf_size)
742 if ((q - buf) < buf_size - 1)
749 static int asf_probe(AVProbeData *pd)
752 const unsigned char *p;
755 /* check file header */
756 if (pd->buf_size <= 32)
759 g.v1 = p[0] | (p[1] << 8) | (p[2] << 16) | (p[3] << 24);
761 g.v2 = p[0] | (p[1] << 8);
763 g.v3 = p[0] | (p[1] << 8);
768 if (!memcmp(&g, &asf_header, sizeof(GUID)))
769 return AVPROBE_SCORE_MAX;
774 static int asf_read_header(AVFormatContext *s, AVFormatParameters *ap)
776 ASFContext *asf = s->priv_data;
778 ByteIOContext *pb = &s->pb;
784 av_set_pts_info(s, 32, 1, 1000); /* 32 bit pts in ms */
787 if (memcmp(&g, &asf_header, sizeof(GUID)))
793 memset(&asf->asfid2avid, -1, sizeof(asf->asfid2avid));
796 gsize = get_le64(pb);
798 printf("%08Lx: ", url_ftell(pb) - 24);
800 printf(" size=0x%Lx\n", gsize);
804 if (!memcmp(&g, &file_header, sizeof(GUID))) {
805 get_guid(pb, &asf->hdr.guid);
806 asf->hdr.file_size = get_le64(pb);
807 asf->hdr.create_time = get_le64(pb);
808 asf->hdr.packets_count = get_le64(pb);
809 asf->hdr.play_time = get_le64(pb);
810 asf->hdr.send_time = get_le64(pb);
811 asf->hdr.preroll = get_le32(pb);
812 asf->hdr.ignore = get_le32(pb);
813 asf->hdr.flags = get_le32(pb);
814 asf->hdr.min_pktsize = get_le32(pb);
815 asf->hdr.max_pktsize = get_le32(pb);
816 asf->hdr.max_bitrate = get_le32(pb);
817 asf->packet_size = asf->hdr.max_pktsize;
818 asf->nb_packets = asf->hdr.packets_count;
819 } else if (!memcmp(&g, &stream_header, sizeof(GUID))) {
820 int type, total_size, type_specific_size;
824 pos1 = url_ftell(pb);
826 st = av_new_stream(s, 0);
829 asf_st = av_mallocz(sizeof(ASFStream));
832 st->priv_data = asf_st;
833 st->start_time = asf->hdr.preroll / (10000000 / AV_TIME_BASE);
834 st->duration = (asf->hdr.send_time - asf->hdr.preroll) /
835 (10000000 / AV_TIME_BASE);
837 if (!memcmp(&g, &audio_stream, sizeof(GUID))) {
838 type = CODEC_TYPE_AUDIO;
839 } else if (!memcmp(&g, &video_stream, sizeof(GUID))) {
840 type = CODEC_TYPE_VIDEO;
845 total_size = get_le64(pb);
846 type_specific_size = get_le32(pb);
848 st->id = get_le16(pb) & 0x7f; /* stream id */
849 // mapping of asf ID to AV stream ID;
850 asf->asfid2avid[st->id] = s->nb_streams - 1;
853 st->codec.codec_type = type;
854 /* 1 fps default (XXX: put 0 fps instead) */
855 st->codec.frame_rate = 1;
856 st->codec.frame_rate_base = 1;
857 if (type == CODEC_TYPE_AUDIO) {
858 get_wav_header(pb, &st->codec, type_specific_size);
859 st->need_parsing = 1;
860 /* We have to init the frame size at some point .... */
861 pos2 = url_ftell(pb);
862 if (gsize > (pos2 + 8 - pos1 + 24)) {
863 asf_st->ds_span = get_byte(pb);
864 asf_st->ds_packet_size = get_le16(pb);
865 asf_st->ds_chunk_size = get_le16(pb);
866 asf_st->ds_data_size = get_le16(pb);
867 asf_st->ds_silence_data = get_byte(pb);
869 //printf("Descrambling: ps:%d cs:%d ds:%d s:%d sd:%d\n",
870 // asf_st->ds_packet_size, asf_st->ds_chunk_size,
871 // asf_st->ds_data_size, asf_st->ds_span, asf_st->ds_silence_data);
872 if (asf_st->ds_span > 1) {
873 if (!asf_st->ds_chunk_size
874 || (asf_st->ds_packet_size/asf_st->ds_chunk_size <= 1))
875 asf_st->ds_span = 0; // disable descrambling
877 switch (st->codec.codec_id) {
879 st->codec.frame_size = MPA_FRAME_SIZE;
881 case CODEC_ID_PCM_S16LE:
882 case CODEC_ID_PCM_S16BE:
883 case CODEC_ID_PCM_U16LE:
884 case CODEC_ID_PCM_U16BE:
885 case CODEC_ID_PCM_S8:
886 case CODEC_ID_PCM_U8:
887 case CODEC_ID_PCM_ALAW:
888 case CODEC_ID_PCM_MULAW:
889 st->codec.frame_size = 1;
892 /* This is probably wrong, but it prevents a crash later */
893 st->codec.frame_size = 1;
900 size = get_le16(pb); /* size */
901 get_le32(pb); /* size */
902 st->codec.width = get_le32(pb);
903 st->codec.height = get_le32(pb);
904 /* not available for asf */
905 get_le16(pb); /* panes */
906 st->codec.bits_per_sample = get_le16(pb); /* depth */
910 st->codec.extradata_size = size - 40;
911 st->codec.extradata = av_mallocz(st->codec.extradata_size);
912 get_buffer(pb, st->codec.extradata, st->codec.extradata_size);
915 /* Extract palette from extradata if bpp <= 8 */
916 /* This code assumes that extradata contains only palette */
917 /* This is true for all paletted codecs implemented in ffmpeg */
918 if (st->codec.extradata_size && (st->codec.bits_per_sample <= 8)) {
919 st->codec.palctrl = av_mallocz(sizeof(AVPaletteControl));
920 #ifdef WORDS_BIGENDIAN
921 for (i = 0; i < FFMIN(st->codec.extradata_size, AVPALETTE_SIZE)/4; i++)
922 st->codec.palctrl->palette[i] = bswap_32(((uint32_t*)st->codec.extradata)[i]);
924 memcpy(st->codec.palctrl->palette, st->codec.extradata,
925 FFMIN(st->codec.extradata_size, AVPALETTE_SIZE));
927 st->codec.palctrl->palette_changed = 1;
930 st->codec.codec_tag = tag1;
931 st->codec.codec_id = codec_get_id(codec_bmp_tags, tag1);
933 pos2 = url_ftell(pb);
934 url_fskip(pb, gsize - (pos2 - pos1 + 24));
935 } else if (!memcmp(&g, &data_header, sizeof(GUID))) {
937 } else if (!memcmp(&g, &comment_header, sizeof(GUID))) {
938 int len1, len2, len3, len4, len5;
945 get_str16_nolen(pb, len1, s->title, sizeof(s->title));
946 get_str16_nolen(pb, len2, s->author, sizeof(s->author));
947 get_str16_nolen(pb, len3, s->copyright, sizeof(s->copyright));
948 get_str16_nolen(pb, len4, s->comment, sizeof(s->comment));
951 } else if (!memcmp(&g, &head1_guid, sizeof(GUID))) {
956 } else if (!memcmp(&g, &codec_comment_header, sizeof(GUID))) {
966 num = get_le16(pb); /* stream number */
967 get_str16(pb, str, sizeof(str));
968 get_str16(pb, str, sizeof(str));
973 if ((q - tag) < sizeof(tag) - 1)
980 } else if (url_feof(pb)) {
983 url_fseek(pb, gsize - 24, SEEK_CUR);
992 asf->data_offset = url_ftell(pb);
993 asf->packet_size_left = 0;
998 for(i=0;i<s->nb_streams;i++) {
999 AVStream *st = s->streams[i];
1001 av_free(st->priv_data);
1002 av_free(st->codec.extradata);
1009 #define DO_2BITS(bits, var, defval) \
1012 case 3: var = get_le32(pb); rsize += 4; break; \
1013 case 2: var = get_le16(pb); rsize += 2; break; \
1014 case 1: var = get_byte(pb); rsize++; break; \
1015 default: var = defval; break; \
1018 static int asf_get_packet(AVFormatContext *s)
1020 ASFContext *asf = s->priv_data;
1021 ByteIOContext *pb = &s->pb;
1022 uint32_t packet_length, padsize;
1024 int c = get_byte(pb);
1027 printf("ff asf bad header %x at:%lld\n", c, url_ftell(pb));
1030 if ((c & 0x0f) == 2) { // always true for now
1031 if (get_le16(pb) != 0) {
1033 printf("ff asf bad non zero\n");
1038 asf->packet_flags = get_byte(pb);
1039 asf->packet_property = get_byte(pb);
1041 DO_2BITS(asf->packet_flags >> 5, packet_length, asf->packet_size);
1042 DO_2BITS(asf->packet_flags >> 1, padsize, 0); // sequence ignored
1043 DO_2BITS(asf->packet_flags >> 3, padsize, 0); // padding length
1045 asf->packet_timestamp = get_le32(pb);
1046 get_le16(pb); /* duration */
1047 // rsize has at least 11 bytes which have to be present
1049 if (asf->packet_flags & 0x01) {
1050 asf->packet_segsizetype = get_byte(pb); rsize++;
1051 asf->packet_segments = asf->packet_segsizetype & 0x3f;
1053 asf->packet_segments = 1;
1054 asf->packet_segsizetype = 0x80;
1056 asf->packet_size_left = packet_length - padsize - rsize;
1057 if (packet_length < asf->hdr.min_pktsize)
1058 padsize += asf->hdr.min_pktsize - packet_length;
1059 asf->packet_padsize = padsize;
1061 printf("packet: size=%d padsize=%d left=%d\n", asf->packet_size, asf->packet_padsize, asf->packet_size_left);
1066 static int asf_read_packet(AVFormatContext *s, AVPacket *pkt)
1068 ASFContext *asf = s->priv_data;
1069 ASFStream *asf_st = 0;
1070 ByteIOContext *pb = &s->pb;
1071 //static int pc = 0;
1074 if (asf->packet_size_left < FRAME_HEADER_SIZE
1075 || asf->packet_segments < 1) {
1076 //asf->packet_size_left <= asf->packet_padsize) {
1077 int ret = asf->packet_size_left + asf->packet_padsize;
1078 //printf("PacketLeftSize:%d Pad:%d Pos:%Ld\n", asf->packet_size_left, asf->packet_padsize, url_ftell(pb));
1081 ret = asf_get_packet(s);
1082 //printf("READ ASF PACKET %d r:%d c:%d\n", ret, asf->packet_size_left, pc++);
1083 if (ret < 0 || url_feof(pb))
1085 asf->packet_time_start = 0;
1088 if (asf->packet_time_start == 0) {
1089 /* read frame header */
1090 int num = get_byte(pb);
1091 asf->packet_segments--;
1093 asf->packet_key_frame = (num & 0x80) >> 7;
1094 asf->stream_index = asf->asfid2avid[num & 0x7f];
1095 // sequence should be ignored!
1096 DO_2BITS(asf->packet_property >> 4, asf->packet_seq, 0);
1097 DO_2BITS(asf->packet_property >> 2, asf->packet_frag_offset, 0);
1098 DO_2BITS(asf->packet_property, asf->packet_replic_size, 0);
1100 if (asf->packet_replic_size > 1) {
1101 // it should be always at least 8 bytes - FIXME validate
1102 asf->packet_obj_size = get_le32(pb);
1103 asf->packet_frag_timestamp = get_le32(pb); // timestamp
1104 if (asf->packet_replic_size > 8)
1105 url_fskip(pb, asf->packet_replic_size - 8);
1106 rsize += asf->packet_replic_size; // FIXME - check validity
1108 // multipacket - frag_offset is begining timestamp
1109 asf->packet_time_start = asf->packet_frag_offset;
1110 asf->packet_frag_offset = 0;
1111 asf->packet_frag_timestamp = asf->packet_timestamp;
1113 if (asf->packet_replic_size == 1) {
1114 asf->packet_time_delta = get_byte(pb);
1118 if (asf->packet_flags & 0x01) {
1119 DO_2BITS(asf->packet_segsizetype >> 6, asf->packet_frag_size, 0); // 0 is illegal
1121 //printf("Fragsize %d\n", asf->packet_frag_size);
1123 asf->packet_frag_size = asf->packet_size_left - rsize;
1124 //printf("Using rest %d %d %d\n", asf->packet_frag_size, asf->packet_size_left, rsize);
1126 if (asf->packet_replic_size == 1) {
1127 asf->packet_multi_size = asf->packet_frag_size;
1128 if (asf->packet_multi_size > asf->packet_size_left) {
1129 asf->packet_segments = 0;
1133 asf->packet_size_left -= rsize;
1134 //printf("___objsize____ %d %d rs:%d\n", asf->packet_obj_size, asf->packet_frag_offset, rsize);
1136 if (asf->stream_index < 0) {
1137 asf->packet_time_start = 0;
1138 /* unhandled packet (should not happen) */
1139 url_fskip(pb, asf->packet_frag_size);
1140 asf->packet_size_left -= asf->packet_frag_size;
1141 printf("ff asf skip %d %d\n", asf->packet_frag_size, num & 0x7f);
1144 asf->asf_st = s->streams[asf->stream_index]->priv_data;
1146 asf_st = asf->asf_st;
1148 if ((asf->packet_frag_offset != asf_st->frag_offset
1149 || (asf->packet_frag_offset
1150 && asf->packet_seq != asf_st->seq)) // seq should be ignored
1152 /* cannot continue current packet: free it */
1153 // FIXME better check if packet was already allocated
1154 printf("ff asf parser skips: %d - %d o:%d - %d %d %d fl:%d\n",
1156 asf->packet_obj_size,
1157 asf->packet_frag_offset, asf_st->frag_offset,
1158 asf->packet_seq, asf_st->seq, asf->packet_frag_size);
1159 if (asf_st->pkt.size)
1160 av_free_packet(&asf_st->pkt);
1161 asf_st->frag_offset = 0;
1162 if (asf->packet_frag_offset != 0) {
1163 url_fskip(pb, asf->packet_frag_size);
1164 printf("ff asf parser skiping %db\n", asf->packet_frag_size);
1165 asf->packet_size_left -= asf->packet_frag_size;
1169 if (asf->packet_replic_size == 1) {
1170 // frag_offset is here used as the begining timestamp
1171 asf->packet_frag_timestamp = asf->packet_time_start;
1172 asf->packet_time_start += asf->packet_time_delta;
1173 asf->packet_obj_size = asf->packet_frag_size = get_byte(pb);
1174 asf->packet_size_left--;
1175 asf->packet_multi_size--;
1176 if (asf->packet_multi_size < asf->packet_obj_size)
1178 asf->packet_time_start = 0;
1179 url_fskip(pb, asf->packet_multi_size);
1180 asf->packet_size_left -= asf->packet_multi_size;
1183 asf->packet_multi_size -= asf->packet_obj_size;
1184 //printf("COMPRESS size %d %d %d ms:%d\n", asf->packet_obj_size, asf->packet_frag_timestamp, asf->packet_size_left, asf->packet_multi_size);
1186 if (asf_st->frag_offset == 0) {
1188 av_new_packet(&asf_st->pkt, asf->packet_obj_size);
1189 asf_st->seq = asf->packet_seq;
1190 asf_st->pkt.pts = asf->packet_frag_timestamp - asf->hdr.preroll;
1191 asf_st->pkt.stream_index = asf->stream_index;
1192 if (asf->packet_key_frame)
1193 asf_st->pkt.flags |= PKT_FLAG_KEY;
1197 //printf("READ PACKET s:%d os:%d o:%d,%d l:%d DATA:%p\n",
1198 // asf->packet_size, asf_st->pkt.size, asf->packet_frag_offset,
1199 // asf_st->frag_offset, asf->packet_frag_size, asf_st->pkt.data);
1200 asf->packet_size_left -= asf->packet_frag_size;
1201 if (asf->packet_size_left < 0)
1203 get_buffer(pb, asf_st->pkt.data + asf->packet_frag_offset,
1204 asf->packet_frag_size);
1205 asf_st->frag_offset += asf->packet_frag_size;
1206 /* test if whole packet is read */
1207 if (asf_st->frag_offset == asf_st->pkt.size) {
1209 if (asf_st->ds_span > 1) {
1210 /* packet descrambling */
1211 char* newdata = av_malloc(asf_st->pkt.size);
1214 while (offset < asf_st->pkt.size) {
1215 int off = offset / asf_st->ds_chunk_size;
1216 int row = off / asf_st->ds_span;
1217 int col = off % asf_st->ds_span;
1218 int idx = row + col * asf_st->ds_packet_size / asf_st->ds_chunk_size;
1219 //printf("off:%d row:%d col:%d idx:%d\n", off, row, col, idx);
1220 memcpy(newdata + offset,
1221 asf_st->pkt.data + idx * asf_st->ds_chunk_size,
1222 asf_st->ds_chunk_size);
1223 offset += asf_st->ds_chunk_size;
1225 av_free(asf_st->pkt.data);
1226 asf_st->pkt.data = newdata;
1229 asf_st->frag_offset = 0;
1230 memcpy(pkt, &asf_st->pkt, sizeof(AVPacket));
1231 //printf("packet %d %d\n", asf_st->pkt.size, asf->packet_frag_size);
1232 asf_st->pkt.size = 0;
1233 asf_st->pkt.data = 0;
1234 break; // packet completed
1240 static int asf_read_close(AVFormatContext *s)
1244 for(i=0;i<s->nb_streams;i++) {
1245 AVStream *st = s->streams[i];
1246 av_free(st->priv_data);
1247 av_free(st->codec.extradata);
1248 av_free(st->codec.palctrl);
1253 static int asf_read_seek(AVFormatContext *s, int stream_index, int64_t pts)
1256 ASFContext *asf = s->priv_data;
1260 url_fseek(&s->pb, asf->data_offset + i * asf->packet_size, SEEK_SET);
1261 if (asf_get_packet(s) < 0)
1263 printf("timestamp=%0.3f\n", asf->packet_timestamp / 1000.0);
1269 static AVInputFormat asf_iformat = {
1280 #ifdef CONFIG_ENCODERS
1281 static AVOutputFormat asf_oformat = {
1287 #ifdef CONFIG_MP3LAME
1298 static AVOutputFormat asf_stream_oformat = {
1304 #ifdef CONFIG_MP3LAME
1310 asf_write_stream_header,
1314 #endif //CONFIG_ENCODERS
1318 av_register_input_format(&asf_iformat);
1319 #ifdef CONFIG_ENCODERS
1320 av_register_output_format(&asf_oformat);
1321 av_register_output_format(&asf_stream_oformat);
1322 #endif //CONFIG_ENCODERS