2 * ASF compatible 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"
27 #define FRAME_HEADER_SIZE 17
28 // Fix Me! FRAME_HEADER_SIZE may be different.
30 static const GUID index_guid = {
31 0x33000890, 0xe5b1, 0x11cf, { 0x89, 0xf4, 0x00, 0xa0, 0xc9, 0x03, 0x49, 0xcb },
34 /**********************************/
40 #define PRINT_IF_GUID(g,cmp) \
41 if (!memcmp(g, &cmp, sizeof(GUID))) \
42 printf("(GUID: %s) ", #cmp)
44 static void print_guid(const GUID *g)
47 PRINT_IF_GUID(g, asf_header);
48 else PRINT_IF_GUID(g, file_header);
49 else PRINT_IF_GUID(g, stream_header);
50 else PRINT_IF_GUID(g, audio_stream);
51 else PRINT_IF_GUID(g, audio_conceal_none);
52 else PRINT_IF_GUID(g, video_stream);
53 else PRINT_IF_GUID(g, video_conceal_none);
54 else PRINT_IF_GUID(g, comment_header);
55 else PRINT_IF_GUID(g, codec_comment_header);
56 else PRINT_IF_GUID(g, codec_comment1_header);
57 else PRINT_IF_GUID(g, data_header);
58 else PRINT_IF_GUID(g, index_guid);
59 else PRINT_IF_GUID(g, head1_guid);
60 else PRINT_IF_GUID(g, head2_guid);
61 else PRINT_IF_GUID(g, my_guid);
63 printf("(GUID: unknown) ");
64 printf("0x%08x, 0x%04x, 0x%04x, {", g->v1, g->v2, g->v3);
66 printf(" 0x%02x,", g->v4[i]);
69 #undef PRINT_IF_GUID(g,cmp)
72 static void get_guid(ByteIOContext *s, GUID *g)
80 g->v4[i] = get_byte(s);
84 static void get_str16(ByteIOContext *pb, char *buf, int buf_size)
93 if ((q - buf) < buf_size - 1)
101 static void get_str16_nolen(ByteIOContext *pb, int len, char *buf, int buf_size)
109 if ((q - buf) < buf_size - 1)
116 static int asf_probe(AVProbeData *pd)
119 const unsigned char *p;
122 /* check file header */
123 if (pd->buf_size <= 32)
126 g.v1 = p[0] | (p[1] << 8) | (p[2] << 16) | (p[3] << 24);
128 g.v2 = p[0] | (p[1] << 8);
130 g.v3 = p[0] | (p[1] << 8);
135 if (!memcmp(&g, &asf_header, sizeof(GUID)))
136 return AVPROBE_SCORE_MAX;
141 static int asf_read_header(AVFormatContext *s, AVFormatParameters *ap)
143 ASFContext *asf = s->priv_data;
145 ByteIOContext *pb = &s->pb;
152 if (memcmp(&g, &asf_header, sizeof(GUID)))
158 memset(&asf->asfid2avid, -1, sizeof(asf->asfid2avid));
161 gsize = get_le64(pb);
163 printf("%08Lx: ", url_ftell(pb) - 24);
165 printf(" size=0x%Lx\n", gsize);
169 if (!memcmp(&g, &file_header, sizeof(GUID))) {
170 get_guid(pb, &asf->hdr.guid);
171 asf->hdr.file_size = get_le64(pb);
172 asf->hdr.create_time = get_le64(pb);
173 asf->hdr.packets_count = get_le64(pb);
174 asf->hdr.play_time = get_le64(pb);
175 asf->hdr.send_time = get_le64(pb);
176 asf->hdr.preroll = get_le32(pb);
177 asf->hdr.ignore = get_le32(pb);
178 asf->hdr.flags = get_le32(pb);
179 asf->hdr.min_pktsize = get_le32(pb);
180 asf->hdr.max_pktsize = get_le32(pb);
181 asf->hdr.max_bitrate = get_le32(pb);
182 asf->packet_size = asf->hdr.max_pktsize;
183 asf->nb_packets = asf->hdr.packets_count;
184 } else if (!memcmp(&g, &stream_header, sizeof(GUID))) {
185 int type, total_size, type_specific_size, sizeX;
189 pos1 = url_ftell(pb);
191 st = av_new_stream(s, 0);
194 av_set_pts_info(st, 32, 1, 1000); /* 32 bit pts in ms */
195 asf_st = av_mallocz(sizeof(ASFStream));
198 st->priv_data = asf_st;
199 st->start_time = asf->hdr.preroll;
200 st->duration = asf->hdr.send_time /
201 (10000000 / 1000) - st->start_time;
203 if (!memcmp(&g, &audio_stream, sizeof(GUID))) {
204 type = CODEC_TYPE_AUDIO;
205 } else if (!memcmp(&g, &video_stream, sizeof(GUID))) {
206 type = CODEC_TYPE_VIDEO;
211 total_size = get_le64(pb);
212 type_specific_size = get_le32(pb);
214 st->id = get_le16(pb) & 0x7f; /* stream id */
215 // mapping of asf ID to AV stream ID;
216 asf->asfid2avid[st->id] = s->nb_streams - 1;
219 st->codec.codec_type = type;
220 if (type == CODEC_TYPE_AUDIO) {
221 get_wav_header(pb, &st->codec, type_specific_size);
222 st->need_parsing = 1;
223 /* We have to init the frame size at some point .... */
224 pos2 = url_ftell(pb);
225 if (gsize > (pos2 + 8 - pos1 + 24)) {
226 asf_st->ds_span = get_byte(pb);
227 asf_st->ds_packet_size = get_le16(pb);
228 asf_st->ds_chunk_size = get_le16(pb);
229 asf_st->ds_data_size = get_le16(pb);
230 asf_st->ds_silence_data = get_byte(pb);
232 //printf("Descrambling: ps:%d cs:%d ds:%d s:%d sd:%d\n",
233 // asf_st->ds_packet_size, asf_st->ds_chunk_size,
234 // asf_st->ds_data_size, asf_st->ds_span, asf_st->ds_silence_data);
235 if (asf_st->ds_span > 1) {
236 if (!asf_st->ds_chunk_size
237 || (asf_st->ds_packet_size/asf_st->ds_chunk_size <= 1))
238 asf_st->ds_span = 0; // disable descrambling
240 switch (st->codec.codec_id) {
242 st->codec.frame_size = MPA_FRAME_SIZE;
244 case CODEC_ID_PCM_S16LE:
245 case CODEC_ID_PCM_S16BE:
246 case CODEC_ID_PCM_U16LE:
247 case CODEC_ID_PCM_U16BE:
248 case CODEC_ID_PCM_S8:
249 case CODEC_ID_PCM_U8:
250 case CODEC_ID_PCM_ALAW:
251 case CODEC_ID_PCM_MULAW:
252 st->codec.frame_size = 1;
255 /* This is probably wrong, but it prevents a crash later */
256 st->codec.frame_size = 1;
263 size = get_le16(pb); /* size */
264 sizeX= get_le32(pb); /* size */
265 st->codec.width = get_le32(pb);
266 st->codec.height = get_le32(pb);
267 /* not available for asf */
268 get_le16(pb); /* panes */
269 st->codec.bits_per_sample = get_le16(pb); /* depth */
272 // av_log(NULL, AV_LOG_DEBUG, "size:%d tsize:%d sizeX:%d\n", size, total_size, sizeX);
275 st->codec.extradata_size = size - 40;
276 st->codec.extradata = av_mallocz(st->codec.extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
277 get_buffer(pb, st->codec.extradata, st->codec.extradata_size);
280 /* Extract palette from extradata if bpp <= 8 */
281 /* This code assumes that extradata contains only palette */
282 /* This is true for all paletted codecs implemented in ffmpeg */
283 if (st->codec.extradata_size && (st->codec.bits_per_sample <= 8)) {
284 st->codec.palctrl = av_mallocz(sizeof(AVPaletteControl));
285 #ifdef WORDS_BIGENDIAN
286 for (i = 0; i < FFMIN(st->codec.extradata_size, AVPALETTE_SIZE)/4; i++)
287 st->codec.palctrl->palette[i] = bswap_32(((uint32_t*)st->codec.extradata)[i]);
289 memcpy(st->codec.palctrl->palette, st->codec.extradata,
290 FFMIN(st->codec.extradata_size, AVPALETTE_SIZE));
292 st->codec.palctrl->palette_changed = 1;
295 st->codec.codec_tag = tag1;
296 st->codec.codec_id = codec_get_id(codec_bmp_tags, tag1);
297 if(tag1 == MKTAG('D', 'V', 'R', ' '))
298 st->need_parsing = 1;
300 pos2 = url_ftell(pb);
301 url_fskip(pb, gsize - (pos2 - pos1 + 24));
302 } else if (!memcmp(&g, &data_header, sizeof(GUID))) {
304 } else if (!memcmp(&g, &comment_header, sizeof(GUID))) {
305 int len1, len2, len3, len4, len5;
312 get_str16_nolen(pb, len1, s->title, sizeof(s->title));
313 get_str16_nolen(pb, len2, s->author, sizeof(s->author));
314 get_str16_nolen(pb, len3, s->copyright, sizeof(s->copyright));
315 get_str16_nolen(pb, len4, s->comment, sizeof(s->comment));
317 } else if (!memcmp(&g, &extended_content_header, sizeof(GUID))) {
320 desc_count = get_le16(pb);
321 for(i=0;i<desc_count;i++)
323 int name_len,value_type,value_len,value_num = 0;
326 name_len = get_le16(pb);
327 name = (char *)av_mallocz(name_len);
328 get_str16_nolen(pb, name_len, name, name_len);
329 value_type = get_le16(pb);
330 value_len = get_le16(pb);
331 if ((value_type == 0) || (value_type == 1)) // unicode or byte
333 value = (char *)av_mallocz(value_len);
334 get_str16_nolen(pb, value_len, value, value_len);
335 if (strcmp(name,"WM/AlbumTitle")==0) { pstrcpy(s->album, sizeof(s->album), value); }
338 if ((value_type >= 2) || (value_type <= 5)) // boolean or DWORD or QWORD or WORD
340 if (value_type==2) value_num = get_le32(pb);
341 if (value_type==3) value_num = get_le32(pb);
342 if (value_type==4) value_num = get_le64(pb);
343 if (value_type==5) value_num = get_le16(pb);
344 if (strcmp(name,"WM/Track")==0) s->track = value_num + 1;
345 if (strcmp(name,"WM/TrackNumber")==0) s->track = value_num;
350 } else if (!memcmp(&g, &head1_guid, sizeof(GUID))) {
355 } else if (!memcmp(&g, &codec_comment_header, sizeof(GUID))) {
365 num = get_le16(pb); /* stream number */
366 get_str16(pb, str, sizeof(str));
367 get_str16(pb, str, sizeof(str));
372 if ((q - tag) < sizeof(tag) - 1)
379 } else if (url_feof(pb)) {
382 url_fseek(pb, gsize - 24, SEEK_CUR);
391 asf->data_offset = url_ftell(pb);
392 asf->packet_size_left = 0;
397 for(i=0;i<s->nb_streams;i++) {
398 AVStream *st = s->streams[i];
400 av_free(st->priv_data);
401 av_free(st->codec.extradata);
408 #define DO_2BITS(bits, var, defval) \
411 case 3: var = get_le32(pb); rsize += 4; break; \
412 case 2: var = get_le16(pb); rsize += 2; break; \
413 case 1: var = get_byte(pb); rsize++; break; \
414 default: var = defval; break; \
417 static int asf_get_packet(AVFormatContext *s)
419 ASFContext *asf = s->priv_data;
420 ByteIOContext *pb = &s->pb;
421 uint32_t packet_length, padsize;
425 if((url_ftell(&s->pb) - s->data_offset) % asf->packet_size)
427 assert((url_ftell(&s->pb) - s->data_offset) % asf->packet_size == 0);
432 av_log(s, AV_LOG_ERROR, "ff asf bad header %x at:%lld\n", c, url_ftell(pb));
434 if ((c & 0x0f) == 2) { // always true for now
435 if (get_le16(pb) != 0) {
437 av_log(s, AV_LOG_ERROR, "ff asf bad non zero\n");
443 printf("ff asf bad header %x at:%lld\n", c, url_ftell(pb));
447 asf->packet_flags = get_byte(pb);
448 asf->packet_property = get_byte(pb);
450 DO_2BITS(asf->packet_flags >> 5, packet_length, asf->packet_size);
451 DO_2BITS(asf->packet_flags >> 1, padsize, 0); // sequence ignored
452 DO_2BITS(asf->packet_flags >> 3, padsize, 0); // padding length
454 asf->packet_timestamp = get_le32(pb);
455 get_le16(pb); /* duration */
456 // rsize has at least 11 bytes which have to be present
458 if (asf->packet_flags & 0x01) {
459 asf->packet_segsizetype = get_byte(pb); rsize++;
460 asf->packet_segments = asf->packet_segsizetype & 0x3f;
462 asf->packet_segments = 1;
463 asf->packet_segsizetype = 0x80;
465 asf->packet_size_left = packet_length - padsize - rsize;
466 if (packet_length < asf->hdr.min_pktsize)
467 padsize += asf->hdr.min_pktsize - packet_length;
468 asf->packet_padsize = padsize;
470 printf("packet: size=%d padsize=%d left=%d\n", asf->packet_size, asf->packet_padsize, asf->packet_size_left);
475 static int asf_read_packet(AVFormatContext *s, AVPacket *pkt)
477 ASFContext *asf = s->priv_data;
478 ASFStream *asf_st = 0;
479 ByteIOContext *pb = &s->pb;
483 if (asf->packet_size_left < FRAME_HEADER_SIZE
484 || asf->packet_segments < 1) {
485 //asf->packet_size_left <= asf->packet_padsize) {
486 int ret = asf->packet_size_left + asf->packet_padsize;
487 //printf("PacketLeftSize:%d Pad:%d Pos:%Ld\n", asf->packet_size_left, asf->packet_padsize, url_ftell(pb));
490 asf->packet_pos= url_ftell(&s->pb);
491 ret = asf_get_packet(s);
492 //printf("READ ASF PACKET %d r:%d c:%d\n", ret, asf->packet_size_left, pc++);
493 if (ret < 0 || url_feof(pb))
495 asf->packet_time_start = 0;
498 if (asf->packet_time_start == 0) {
499 /* read frame header */
500 int num = get_byte(pb);
501 asf->packet_segments--;
503 asf->packet_key_frame = (num & 0x80) >> 7;
504 asf->stream_index = asf->asfid2avid[num & 0x7f];
505 // sequence should be ignored!
506 DO_2BITS(asf->packet_property >> 4, asf->packet_seq, 0);
507 DO_2BITS(asf->packet_property >> 2, asf->packet_frag_offset, 0);
508 DO_2BITS(asf->packet_property, asf->packet_replic_size, 0);
509 //printf("key:%d stream:%d seq:%d offset:%d replic_size:%d\n", asf->packet_key_frame, asf->stream_index, asf->packet_seq, //asf->packet_frag_offset, asf->packet_replic_size);
510 if (asf->packet_replic_size > 1) {
511 assert(asf->packet_replic_size >= 8);
512 // it should be always at least 8 bytes - FIXME validate
513 asf->packet_obj_size = get_le32(pb);
514 asf->packet_frag_timestamp = get_le32(pb); // timestamp
515 if (asf->packet_replic_size > 8)
516 url_fskip(pb, asf->packet_replic_size - 8);
517 rsize += asf->packet_replic_size; // FIXME - check validity
518 } else if (asf->packet_replic_size==1){
519 // multipacket - frag_offset is begining timestamp
520 asf->packet_time_start = asf->packet_frag_offset;
521 asf->packet_frag_offset = 0;
522 asf->packet_frag_timestamp = asf->packet_timestamp;
524 asf->packet_time_delta = get_byte(pb);
527 assert(asf->packet_replic_size==0);
529 if (asf->packet_flags & 0x01) {
530 DO_2BITS(asf->packet_segsizetype >> 6, asf->packet_frag_size, 0); // 0 is illegal
532 //printf("Fragsize %d\n", asf->packet_frag_size);
534 asf->packet_frag_size = asf->packet_size_left - rsize;
535 //printf("Using rest %d %d %d\n", asf->packet_frag_size, asf->packet_size_left, rsize);
537 if (asf->packet_replic_size == 1) {
538 asf->packet_multi_size = asf->packet_frag_size;
539 if (asf->packet_multi_size > asf->packet_size_left) {
540 asf->packet_segments = 0;
544 asf->packet_size_left -= rsize;
545 //printf("___objsize____ %d %d rs:%d\n", asf->packet_obj_size, asf->packet_frag_offset, rsize);
547 if (asf->stream_index < 0
548 || s->streams[asf->stream_index]->discard >= AVDISCARD_ALL
549 || (!asf->packet_key_frame && s->streams[asf->stream_index]->discard >= AVDISCARD_NONKEY)
551 asf->packet_time_start = 0;
552 /* unhandled packet (should not happen) */
553 url_fskip(pb, asf->packet_frag_size);
554 asf->packet_size_left -= asf->packet_frag_size;
555 if(asf->stream_index < 0)
556 av_log(s, AV_LOG_ERROR, "ff asf skip %d %d\n", asf->packet_frag_size, num & 0x7f);
559 asf->asf_st = s->streams[asf->stream_index]->priv_data;
561 asf_st = asf->asf_st;
563 if ((asf->packet_frag_offset != asf_st->frag_offset
564 || (asf->packet_frag_offset
565 && asf->packet_seq != asf_st->seq)) // seq should be ignored
567 /* cannot continue current packet: free it */
568 // FIXME better check if packet was already allocated
569 av_log(s, AV_LOG_INFO, "ff asf parser skips: %d - %d o:%d - %d %d %d fl:%d\n",
571 asf->packet_obj_size,
572 asf->packet_frag_offset, asf_st->frag_offset,
573 asf->packet_seq, asf_st->seq, asf->packet_frag_size);
574 if (asf_st->pkt.size)
575 av_free_packet(&asf_st->pkt);
576 asf_st->frag_offset = 0;
577 if (asf->packet_frag_offset != 0) {
578 url_fskip(pb, asf->packet_frag_size);
579 av_log(s, AV_LOG_INFO, "ff asf parser skipping %db\n", asf->packet_frag_size);
580 asf->packet_size_left -= asf->packet_frag_size;
584 if (asf->packet_replic_size == 1) {
585 // frag_offset is here used as the begining timestamp
586 asf->packet_frag_timestamp = asf->packet_time_start;
587 asf->packet_time_start += asf->packet_time_delta;
588 asf->packet_obj_size = asf->packet_frag_size = get_byte(pb);
589 asf->packet_size_left--;
590 asf->packet_multi_size--;
591 if (asf->packet_multi_size < asf->packet_obj_size)
593 asf->packet_time_start = 0;
594 url_fskip(pb, asf->packet_multi_size);
595 asf->packet_size_left -= asf->packet_multi_size;
598 asf->packet_multi_size -= asf->packet_obj_size;
599 //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);
601 if (asf_st->frag_offset == 0) {
603 av_new_packet(&asf_st->pkt, asf->packet_obj_size);
604 asf_st->seq = asf->packet_seq;
605 asf_st->pkt.pts = asf->packet_frag_timestamp;
606 asf_st->pkt.stream_index = asf->stream_index;
608 asf_st->packet_pos= asf->packet_pos;
609 //printf("new packet: stream:%d key:%d packet_key:%d audio:%d size:%d\n",
610 //asf->stream_index, asf->packet_key_frame, asf_st->pkt.flags & PKT_FLAG_KEY,
611 //s->streams[asf->stream_index]->codec.codec_type == CODEC_TYPE_AUDIO, asf->packet_obj_size);
612 if (s->streams[asf->stream_index]->codec.codec_type == CODEC_TYPE_AUDIO)
613 asf->packet_key_frame = 1;
614 if (asf->packet_key_frame)
615 asf_st->pkt.flags |= PKT_FLAG_KEY;
619 //printf("READ PACKET s:%d os:%d o:%d,%d l:%d DATA:%p\n",
620 // asf->packet_size, asf_st->pkt.size, asf->packet_frag_offset,
621 // asf_st->frag_offset, asf->packet_frag_size, asf_st->pkt.data);
622 asf->packet_size_left -= asf->packet_frag_size;
623 if (asf->packet_size_left < 0)
625 get_buffer(pb, asf_st->pkt.data + asf->packet_frag_offset,
626 asf->packet_frag_size);
627 asf_st->frag_offset += asf->packet_frag_size;
628 /* test if whole packet is read */
629 if (asf_st->frag_offset == asf_st->pkt.size) {
631 if (asf_st->ds_span > 1) {
632 /* packet descrambling */
633 char* newdata = av_malloc(asf_st->pkt.size);
636 while (offset < asf_st->pkt.size) {
637 int off = offset / asf_st->ds_chunk_size;
638 int row = off / asf_st->ds_span;
639 int col = off % asf_st->ds_span;
640 int idx = row + col * asf_st->ds_packet_size / asf_st->ds_chunk_size;
641 //printf("off:%d row:%d col:%d idx:%d\n", off, row, col, idx);
642 memcpy(newdata + offset,
643 asf_st->pkt.data + idx * asf_st->ds_chunk_size,
644 asf_st->ds_chunk_size);
645 offset += asf_st->ds_chunk_size;
647 av_free(asf_st->pkt.data);
648 asf_st->pkt.data = newdata;
651 asf_st->frag_offset = 0;
652 memcpy(pkt, &asf_st->pkt, sizeof(AVPacket));
653 //printf("packet %d %d\n", asf_st->pkt.size, asf->packet_frag_size);
654 asf_st->pkt.size = 0;
655 asf_st->pkt.data = 0;
656 break; // packet completed
662 static int asf_read_close(AVFormatContext *s)
666 for(i=0;i<s->nb_streams;i++) {
667 AVStream *st = s->streams[i];
668 av_free(st->priv_data);
669 av_free(st->codec.extradata);
670 av_free(st->codec.palctrl);
675 // Added to support seeking after packets have been read
676 // If information is not reset, read_packet fails due to
677 // leftover information from previous reads
678 static void asf_reset_header(AVFormatContext *s)
680 ASFContext *asf = s->priv_data;
684 asf->packet_nb_frames = 0;
685 asf->packet_timestamp_start = -1;
686 asf->packet_timestamp_end = -1;
687 asf->packet_size_left = 0;
688 asf->packet_segments = 0;
689 asf->packet_flags = 0;
690 asf->packet_property = 0;
691 asf->packet_timestamp = 0;
692 asf->packet_segsizetype = 0;
693 asf->packet_segments = 0;
695 asf->packet_replic_size = 0;
696 asf->packet_key_frame = 0;
697 asf->packet_padsize = 0;
698 asf->packet_frag_offset = 0;
699 asf->packet_frag_size = 0;
700 asf->packet_frag_timestamp = 0;
701 asf->packet_multi_size = 0;
702 asf->packet_obj_size = 0;
703 asf->packet_time_delta = 0;
704 asf->packet_time_start = 0;
706 for(i=0; i<s->nb_streams; i++){
707 asf_st= s->streams[i]->priv_data;
708 av_free_packet(&asf_st->pkt);
709 asf_st->frag_offset=0;
715 static int64_t asf_read_pts(AVFormatContext *s, int stream_index, int64_t *ppos, int64_t pos_limit)
717 ASFContext *asf = s->priv_data;
718 AVPacket pkt1, *pkt = &pkt1;
723 int64_t start_pos[s->nb_streams];
725 for(i=0; i<s->nb_streams; i++){
729 pos= (pos+asf->packet_size-1-s->data_offset)/asf->packet_size*asf->packet_size+ s->data_offset;
731 url_fseek(&s->pb, pos, SEEK_SET);
733 //printf("asf_read_pts\n");
736 if (av_read_frame(s, pkt) < 0){
737 av_log(s, AV_LOG_INFO, "seek failed\n");
738 return AV_NOPTS_VALUE;
741 pts= pkt->pts * 1000 / AV_TIME_BASE;
744 if(pkt->flags&PKT_FLAG_KEY){
745 i= pkt->stream_index;
747 asf_st= s->streams[i]->priv_data;
749 assert((asf_st->packet_pos - s->data_offset) % asf->packet_size == 0);
750 pos= asf_st->packet_pos;
752 av_add_index_entry(s->streams[i], pos, pts, pos - start_pos[i] + 1, AVINDEX_KEYFRAME);
753 start_pos[i]= asf_st->packet_pos + 1;
755 if(pkt->stream_index == stream_index)
761 //printf("found keyframe at %Ld stream %d stamp:%Ld\n", *ppos, stream_index, pts);
766 static int asf_read_seek(AVFormatContext *s, int stream_index, int64_t pts, int flags)
768 ASFContext *asf = s->priv_data;
770 if (asf->packet_size <= 0)
773 if(av_seek_frame_binary(s, stream_index, pts, flags)<0)
780 static AVInputFormat asf_iformat = {
792 #ifdef CONFIG_ENCODERS
793 extern AVOutputFormat asf_oformat;
794 extern AVOutputFormat asf_stream_oformat;
795 #endif //CONFIG_ENCODERS
799 av_register_input_format(&asf_iformat);
800 #ifdef CONFIG_ENCODERS
801 av_register_output_format(&asf_oformat);
802 av_register_output_format(&asf_stream_oformat);
803 #endif //CONFIG_ENCODERS