2 * ASF compatible demuxer
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
23 #include "mpegaudio.h"
30 #define FRAME_HEADER_SIZE 17
31 // Fix Me! FRAME_HEADER_SIZE may be different.
33 static const GUID index_guid = {
34 0x90, 0x08, 0x00, 0x33, 0xb1, 0xe5, 0xcf, 0x11, 0x89, 0xf4, 0x00, 0xa0, 0xc9, 0x03, 0x49, 0xcb
37 static const GUID stream_bitrate_guid = { /* (http://get.to/sdp) */
38 0xce, 0x75, 0xf8, 0x7b, 0x8d, 0x46, 0xd1, 0x11, 0x8d, 0x82, 0x00, 0x60, 0x97, 0xc9, 0xa2, 0xb2
40 /**********************************/
46 #define PRINT_IF_GUID(g,cmp) \
47 if (!memcmp(g, &cmp, sizeof(GUID))) \
48 printf("(GUID: %s) ", #cmp)
50 static void print_guid(const GUID *g)
53 PRINT_IF_GUID(g, asf_header);
54 else PRINT_IF_GUID(g, file_header);
55 else PRINT_IF_GUID(g, stream_header);
56 else PRINT_IF_GUID(g, audio_stream);
57 else PRINT_IF_GUID(g, audio_conceal_none);
58 else PRINT_IF_GUID(g, video_stream);
59 else PRINT_IF_GUID(g, video_conceal_none);
60 else PRINT_IF_GUID(g, command_stream);
61 else PRINT_IF_GUID(g, comment_header);
62 else PRINT_IF_GUID(g, codec_comment_header);
63 else PRINT_IF_GUID(g, codec_comment1_header);
64 else PRINT_IF_GUID(g, data_header);
65 else PRINT_IF_GUID(g, index_guid);
66 else PRINT_IF_GUID(g, head1_guid);
67 else PRINT_IF_GUID(g, head2_guid);
68 else PRINT_IF_GUID(g, my_guid);
69 else PRINT_IF_GUID(g, ext_stream_header);
70 else PRINT_IF_GUID(g, extended_content_header);
71 else PRINT_IF_GUID(g, ext_stream_embed_stream_header);
72 else PRINT_IF_GUID(g, ext_stream_audio_stream);
73 else PRINT_IF_GUID(g, metadata_header);
74 else PRINT_IF_GUID(g, stream_bitrate_guid);
76 printf("(GUID: unknown) ");
78 printf(" 0x%02x,", (*g)[i]);
84 static void get_guid(ByteIOContext *s, GUID *g)
86 assert(sizeof(*g) == 16);
87 get_buffer(s, g, sizeof(*g));
91 static void get_str16(ByteIOContext *pb, char *buf, int buf_size)
100 if ((q - buf) < buf_size - 1)
108 static void get_str16_nolen(ByteIOContext *pb, int len, char *buf, int buf_size)
114 PUT_UTF8(get_le16(pb), tmp, if (q - buf < buf_size - 1) *q++ = tmp;)
119 static int asf_probe(AVProbeData *pd)
121 /* check file header */
122 if (!memcmp(pd->buf, &asf_header, sizeof(GUID)))
123 return AVPROBE_SCORE_MAX;
128 static int get_value(ByteIOContext *pb, int type){
130 case 2: return get_le32(pb);
131 case 3: return get_le32(pb);
132 case 4: return get_le64(pb);
133 case 5: return get_le16(pb);
134 default:return INT_MIN;
138 static int asf_read_header(AVFormatContext *s, AVFormatParameters *ap)
140 ASFContext *asf = s->priv_data;
142 ByteIOContext *pb = &s->pb;
148 uint32_t bitrate[128];
150 memset(dar, 0, sizeof(dar));
151 memset(bitrate, 0, sizeof(bitrate));
154 if (memcmp(&g, &asf_header, sizeof(GUID)))
160 memset(&asf->asfid2avid, -1, sizeof(asf->asfid2avid));
163 gsize = get_le64(pb);
165 printf("%08"PRIx64": ", url_ftell(pb) - 24);
167 printf(" size=0x%"PRIx64"\n", gsize);
169 if (!memcmp(&g, &data_header, sizeof(GUID))) {
170 asf->data_object_offset = url_ftell(pb);
171 // if not streaming, gsize is not unlimited (how?), and there is enough space in the file..
172 if (!(asf->hdr.flags & 0x01) && gsize >= 100) {
173 asf->data_object_size = gsize - 24;
175 asf->data_object_size = (uint64_t)-1;
181 if (!memcmp(&g, &file_header, sizeof(GUID))) {
182 get_guid(pb, &asf->hdr.guid);
183 asf->hdr.file_size = get_le64(pb);
184 asf->hdr.create_time = get_le64(pb);
185 asf->nb_packets = get_le64(pb);
186 asf->hdr.send_time = get_le64(pb);
187 asf->hdr.play_time = get_le64(pb);
188 asf->hdr.preroll = get_le32(pb);
189 asf->hdr.ignore = get_le32(pb);
190 asf->hdr.flags = get_le32(pb);
191 asf->hdr.min_pktsize = get_le32(pb);
192 asf->hdr.max_pktsize = get_le32(pb);
193 asf->hdr.max_bitrate = get_le32(pb);
194 asf->packet_size = asf->hdr.max_pktsize;
195 } else if (!memcmp(&g, &stream_header, sizeof(GUID))) {
196 int type, type_specific_size, sizeX;
200 int test_for_ext_stream_audio, is_dvr_ms_audio=0;
202 pos1 = url_ftell(pb);
204 st = av_new_stream(s, 0);
207 av_set_pts_info(st, 32, 1, 1000); /* 32 bit pts in ms */
208 asf_st = av_mallocz(sizeof(ASFStream));
211 st->priv_data = asf_st;
212 st->start_time = asf->hdr.preroll;
213 if(!(asf->hdr.flags & 0x01)) { // if we aren't streaming...
214 st->duration = asf->hdr.send_time /
215 (10000000 / 1000) - st->start_time;
219 test_for_ext_stream_audio = 0;
220 if (!memcmp(&g, &audio_stream, sizeof(GUID))) {
221 type = CODEC_TYPE_AUDIO;
222 } else if (!memcmp(&g, &video_stream, sizeof(GUID))) {
223 type = CODEC_TYPE_VIDEO;
224 } else if (!memcmp(&g, &command_stream, sizeof(GUID))) {
225 type = CODEC_TYPE_UNKNOWN;
226 } else if (!memcmp(&g, &ext_stream_embed_stream_header, sizeof(GUID))) {
227 test_for_ext_stream_audio = 1;
228 type = CODEC_TYPE_UNKNOWN;
233 total_size = get_le64(pb);
234 type_specific_size = get_le32(pb);
236 st->id = get_le16(pb) & 0x7f; /* stream id */
237 // mapping of asf ID to AV stream ID;
238 asf->asfid2avid[st->id] = s->nb_streams - 1;
242 if (test_for_ext_stream_audio) {
244 if (!memcmp(&g, &ext_stream_audio_stream, sizeof(GUID))) {
245 type = CODEC_TYPE_AUDIO;
256 st->codec->codec_type = type;
257 if (type == CODEC_TYPE_AUDIO) {
258 get_wav_header(pb, st->codec, type_specific_size);
259 if (is_dvr_ms_audio) {
260 // codec_id and codec_tag are unreliable in dvr_ms
261 // files. Set them later by probing stream.
262 st->codec->codec_id = CODEC_ID_NONE;
263 st->codec->codec_tag = 0;
265 st->need_parsing = AVSTREAM_PARSE_FULL;
266 /* We have to init the frame size at some point .... */
267 pos2 = url_ftell(pb);
268 if (gsize >= (pos2 + 8 - pos1 + 24)) {
269 asf_st->ds_span = get_byte(pb);
270 asf_st->ds_packet_size = get_le16(pb);
271 asf_st->ds_chunk_size = get_le16(pb);
272 get_le16(pb); //ds_data_size
273 get_byte(pb); //ds_silence_data
275 //printf("Descrambling: ps:%d cs:%d ds:%d s:%d sd:%d\n",
276 // asf_st->ds_packet_size, asf_st->ds_chunk_size,
277 // asf_st->ds_data_size, asf_st->ds_span, asf_st->ds_silence_data);
278 if (asf_st->ds_span > 1) {
279 if (!asf_st->ds_chunk_size
280 || (asf_st->ds_packet_size/asf_st->ds_chunk_size <= 1)
281 || asf_st->ds_packet_size % asf_st->ds_chunk_size)
282 asf_st->ds_span = 0; // disable descrambling
284 switch (st->codec->codec_id) {
286 st->codec->frame_size = MPA_FRAME_SIZE;
288 case CODEC_ID_PCM_S16LE:
289 case CODEC_ID_PCM_S16BE:
290 case CODEC_ID_PCM_U16LE:
291 case CODEC_ID_PCM_U16BE:
292 case CODEC_ID_PCM_S8:
293 case CODEC_ID_PCM_U8:
294 case CODEC_ID_PCM_ALAW:
295 case CODEC_ID_PCM_MULAW:
296 st->codec->frame_size = 1;
299 /* This is probably wrong, but it prevents a crash later */
300 st->codec->frame_size = 1;
303 } else if (type == CODEC_TYPE_VIDEO) {
307 size = get_le16(pb); /* size */
308 sizeX= get_le32(pb); /* size */
309 st->codec->width = get_le32(pb);
310 st->codec->height = get_le32(pb);
311 /* not available for asf */
312 get_le16(pb); /* panes */
313 st->codec->bits_per_sample = get_le16(pb); /* depth */
316 // av_log(NULL, AV_LOG_DEBUG, "size:%d tsize:%d sizeX:%d\n", size, total_size, sizeX);
319 st->codec->extradata_size = size - 40;
320 st->codec->extradata = av_mallocz(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
321 get_buffer(pb, st->codec->extradata, st->codec->extradata_size);
324 /* Extract palette from extradata if bpp <= 8 */
325 /* This code assumes that extradata contains only palette */
326 /* This is true for all paletted codecs implemented in ffmpeg */
327 if (st->codec->extradata_size && (st->codec->bits_per_sample <= 8)) {
328 st->codec->palctrl = av_mallocz(sizeof(AVPaletteControl));
329 #ifdef WORDS_BIGENDIAN
330 for (i = 0; i < FFMIN(st->codec->extradata_size, AVPALETTE_SIZE)/4; i++)
331 st->codec->palctrl->palette[i] = bswap_32(((uint32_t*)st->codec->extradata)[i]);
333 memcpy(st->codec->palctrl->palette, st->codec->extradata,
334 FFMIN(st->codec->extradata_size, AVPALETTE_SIZE));
336 st->codec->palctrl->palette_changed = 1;
339 st->codec->codec_tag = tag1;
340 st->codec->codec_id = codec_get_id(codec_bmp_tags, tag1);
341 if(tag1 == MKTAG('D', 'V', 'R', ' '))
342 st->need_parsing = AVSTREAM_PARSE_FULL;
344 pos2 = url_ftell(pb);
345 url_fskip(pb, gsize - (pos2 - pos1 + 24));
346 } else if (!memcmp(&g, &comment_header, sizeof(GUID))) {
347 int len1, len2, len3, len4, len5;
354 get_str16_nolen(pb, len1, s->title , sizeof(s->title));
355 get_str16_nolen(pb, len2, s->author , sizeof(s->author));
356 get_str16_nolen(pb, len3, s->copyright, sizeof(s->copyright));
357 get_str16_nolen(pb, len4, s->comment , sizeof(s->comment));
359 } else if (!memcmp(&g, &stream_bitrate_guid, sizeof(GUID))) {
360 int stream_count = get_le16(pb);
363 // av_log(NULL, AV_LOG_ERROR, "stream bitrate properties\n");
364 // av_log(NULL, AV_LOG_ERROR, "streams %d\n", streams);
365 for(j = 0; j < stream_count; j++) {
366 int flags, bitrate, stream_id;
369 bitrate= get_le32(pb);
370 stream_id= (flags & 0x7f);
371 // av_log(NULL, AV_LOG_ERROR, "flags: 0x%x stream id %d, bitrate %d\n", flags, stream_id, bitrate);
372 asf->stream_bitrates[stream_id-1]= bitrate;
374 } else if (!memcmp(&g, &extended_content_header, sizeof(GUID))) {
377 desc_count = get_le16(pb);
378 for(i=0;i<desc_count;i++)
380 int name_len,value_type,value_len;
381 uint64_t value_num = 0;
384 name_len = get_le16(pb);
385 get_str16_nolen(pb, name_len, name, sizeof(name));
386 value_type = get_le16(pb);
387 value_len = get_le16(pb);
388 if ((value_type == 0) || (value_type == 1)) // unicode or byte
390 if (!strcmp(name,"WM/AlbumTitle")) get_str16_nolen(pb, value_len, s->album, sizeof(s->album));
391 else if(!strcmp(name,"WM/Genre" )) get_str16_nolen(pb, value_len, s->genre, sizeof(s->genre));
392 else url_fskip(pb, value_len);
394 if ((value_type >= 2) && (value_type <= 5)) // boolean or DWORD or QWORD or WORD
396 value_num= get_value(pb, value_type);
397 if (!strcmp(name,"WM/Track" )) s->track = value_num + 1;
398 if (!strcmp(name,"WM/TrackNumber")) s->track = value_num;
401 } else if (!memcmp(&g, &metadata_header, sizeof(GUID))) {
402 int n, stream_num, name_len, value_len, value_type, value_num;
408 get_le16(pb); //lang_list_index
409 stream_num= get_le16(pb);
410 name_len= get_le16(pb);
411 value_type= get_le16(pb);
412 value_len= get_le32(pb);
414 get_str16_nolen(pb, name_len, name, sizeof(name));
415 //av_log(NULL, AV_LOG_ERROR, "%d %d %d %d %d <%s>\n", i, stream_num, name_len, value_type, value_len, name);
416 value_num= get_le16(pb);//we should use get_value() here but it doesnt work 2 is le16 here but le32 elsewhere
417 url_fskip(pb, value_len - 2);
420 if (!strcmp(name, "AspectRatioX")) dar[stream_num].num= value_num;
421 else if(!strcmp(name, "AspectRatioY")) dar[stream_num].den= value_num;
424 } else if (!memcmp(&g, &ext_stream_header, sizeof(GUID))) {
425 int ext_len, payload_ext_ct, stream_ct;
426 uint32_t ext_d, leak_rate, stream_num;
428 pos_ex_st = url_ftell(pb);
430 get_le64(pb); // starttime
431 get_le64(pb); // endtime
432 leak_rate = get_le32(pb); // leak-datarate
433 get_le32(pb); // bucket-datasize
434 get_le32(pb); // init-bucket-fullness
435 get_le32(pb); // alt-leak-datarate
436 get_le32(pb); // alt-bucket-datasize
437 get_le32(pb); // alt-init-bucket-fullness
438 get_le32(pb); // max-object-size
439 get_le32(pb); // flags (reliable,seekable,no_cleanpoints?,resend-live-cleanpoints, rest of bits reserved)
440 stream_num = get_le16(pb); // stream-num
441 get_le16(pb); // stream-language-id-index
442 get_le64(pb); // avg frametime in 100ns units
443 stream_ct = get_le16(pb); //stream-name-count
444 payload_ext_ct = get_le16(pb); //payload-extension-system-count
446 if (stream_num < 128)
447 bitrate[stream_num] = leak_rate;
449 for (i=0; i<stream_ct; i++){
451 ext_len = get_le16(pb);
452 url_fseek(pb, ext_len, SEEK_CUR);
455 for (i=0; i<payload_ext_ct; i++){
458 ext_len=get_le32(pb);
459 url_fseek(pb, ext_len, SEEK_CUR);
462 // there could be a optional stream properties object to follow
463 // if so the next iteration will pick it up
464 } else if (!memcmp(&g, &head1_guid, sizeof(GUID))) {
470 } else if (!memcmp(&g, &codec_comment_header, sizeof(GUID))) {
480 num = get_le16(pb); /* stream number */
481 get_str16(pb, str, sizeof(str));
482 get_str16(pb, str, sizeof(str));
487 if ((q - tag) < sizeof(tag) - 1)
494 } else if (url_feof(pb)) {
497 url_fseek(pb, gsize - 24, SEEK_CUR);
506 asf->data_offset = url_ftell(pb);
507 asf->packet_size_left = 0;
510 for(i=0; i<128; i++){
511 int stream_num= asf->asfid2avid[i];
513 AVCodecContext *codec= s->streams[stream_num]->codec;
514 if (!codec->bit_rate)
515 codec->bit_rate = bitrate[i];
516 if (dar[i].num > 0 && dar[i].den > 0)
517 av_reduce(&codec->sample_aspect_ratio.num,
518 &codec->sample_aspect_ratio.den,
519 dar[i].num, dar[i].den, INT_MAX);
520 //av_log(NULL, AV_LOG_ERROR, "dar %d:%d sar=%d:%d\n", dar[i].num, dar[i].den, codec->sample_aspect_ratio.num, codec->sample_aspect_ratio.den);
527 for(i=0;i<s->nb_streams;i++) {
528 AVStream *st = s->streams[i];
530 av_free(st->priv_data);
531 av_free(st->codec->extradata);
538 #define DO_2BITS(bits, var, defval) \
541 case 3: var = get_le32(pb); rsize += 4; break; \
542 case 2: var = get_le16(pb); rsize += 2; break; \
543 case 1: var = get_byte(pb); rsize++; break; \
544 default: var = defval; break; \
549 * @return <0 in case of an error
551 static int asf_get_packet(AVFormatContext *s)
553 ASFContext *asf = s->priv_data;
554 ByteIOContext *pb = &s->pb;
555 uint32_t packet_length, padsize;
559 off= (url_ftell(&s->pb) - s->data_offset) % asf->packet_size + 3;
565 if(c == 0x82 && !d && !e)
571 av_log(s, AV_LOG_ERROR, "ff asf bad header %x at:%"PRId64"\n", c, url_ftell(pb));
573 if ((c & 0x8f) == 0x82) {
576 av_log(s, AV_LOG_ERROR, "ff asf bad non zero\n");
583 url_fseek(pb, -1, SEEK_CUR); //FIXME
586 asf->packet_flags = c;
587 asf->packet_property = d;
589 DO_2BITS(asf->packet_flags >> 5, packet_length, asf->packet_size);
590 DO_2BITS(asf->packet_flags >> 1, padsize, 0); // sequence ignored
591 DO_2BITS(asf->packet_flags >> 3, padsize, 0); // padding length
593 //the following checks prevent overflows and infinite loops
594 if(packet_length >= (1U<<29)){
595 av_log(s, AV_LOG_ERROR, "invalid packet_length %d at:%"PRId64"\n", packet_length, url_ftell(pb));
598 if(padsize >= packet_length){
599 av_log(s, AV_LOG_ERROR, "invalid padsize %d at:%"PRId64"\n", padsize, url_ftell(pb));
603 asf->packet_timestamp = get_le32(pb);
604 get_le16(pb); /* duration */
605 // rsize has at least 11 bytes which have to be present
607 if (asf->packet_flags & 0x01) {
608 asf->packet_segsizetype = get_byte(pb); rsize++;
609 asf->packet_segments = asf->packet_segsizetype & 0x3f;
611 asf->packet_segments = 1;
612 asf->packet_segsizetype = 0x80;
614 asf->packet_size_left = packet_length - padsize - rsize;
615 if (packet_length < asf->hdr.min_pktsize)
616 padsize += asf->hdr.min_pktsize - packet_length;
617 asf->packet_padsize = padsize;
619 printf("packet: size=%d padsize=%d left=%d\n", asf->packet_size, asf->packet_padsize, asf->packet_size_left);
626 * @return <0 if error
628 static int asf_read_frame_header(AVFormatContext *s){
629 ASFContext *asf = s->priv_data;
630 ByteIOContext *pb = &s->pb;
632 int num = get_byte(pb);
635 asf->packet_segments--;
636 asf->packet_key_frame = num >> 7;
637 asf->stream_index = asf->asfid2avid[num & 0x7f];
638 // sequence should be ignored!
639 DO_2BITS(asf->packet_property >> 4, asf->packet_seq, 0);
640 DO_2BITS(asf->packet_property >> 2, asf->packet_frag_offset, 0);
641 DO_2BITS(asf->packet_property, asf->packet_replic_size, 0);
642 //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);
643 if (asf->packet_replic_size >= 8) {
644 asf->packet_obj_size = get_le32(pb);
645 if(asf->packet_obj_size >= (1<<24) || asf->packet_obj_size <= 0){
646 av_log(s, AV_LOG_ERROR, "packet_obj_size invalid\n");
649 asf->packet_frag_timestamp = get_le32(pb); // timestamp
650 if(asf->packet_replic_size >= 8+38+4){
651 // for(i=0; i<asf->packet_replic_size-8; i++)
652 // av_log(s, AV_LOG_DEBUG, "%02X ",get_byte(pb));
653 // av_log(s, AV_LOG_DEBUG, "\n");
659 url_fskip(pb, asf->packet_replic_size - 8 - 38 - 4);
660 if(ts0!= -1) asf->packet_frag_timestamp= ts0/10000;
661 else asf->packet_frag_timestamp= AV_NOPTS_VALUE;
663 url_fskip(pb, asf->packet_replic_size - 8);
664 rsize += asf->packet_replic_size; // FIXME - check validity
665 } else if (asf->packet_replic_size==1){
666 // multipacket - frag_offset is begining timestamp
667 asf->packet_time_start = asf->packet_frag_offset;
668 asf->packet_frag_offset = 0;
669 asf->packet_frag_timestamp = asf->packet_timestamp;
671 asf->packet_time_delta = get_byte(pb);
673 }else if(asf->packet_replic_size!=0){
674 av_log(s, AV_LOG_ERROR, "unexpected packet_replic_size of %d\n", asf->packet_replic_size);
677 if (asf->packet_flags & 0x01) {
678 DO_2BITS(asf->packet_segsizetype >> 6, asf->packet_frag_size, 0); // 0 is illegal
679 if(asf->packet_frag_size > asf->packet_size_left - rsize){
680 av_log(s, AV_LOG_ERROR, "packet_frag_size is invalid\n");
683 //printf("Fragsize %d\n", asf->packet_frag_size);
685 asf->packet_frag_size = asf->packet_size_left - rsize;
686 //printf("Using rest %d %d %d\n", asf->packet_frag_size, asf->packet_size_left, rsize);
688 if (asf->packet_replic_size == 1) {
689 asf->packet_multi_size = asf->packet_frag_size;
690 if (asf->packet_multi_size > asf->packet_size_left)
693 asf->packet_size_left -= rsize;
694 //printf("___objsize____ %d %d rs:%d\n", asf->packet_obj_size, asf->packet_frag_offset, rsize);
699 static int asf_read_packet(AVFormatContext *s, AVPacket *pkt)
701 ASFContext *asf = s->priv_data;
702 ASFStream *asf_st = 0;
703 ByteIOContext *pb = &s->pb;
708 if (asf->packet_size_left < FRAME_HEADER_SIZE
709 || asf->packet_segments < 1) {
710 //asf->packet_size_left <= asf->packet_padsize) {
711 int ret = asf->packet_size_left + asf->packet_padsize;
712 //printf("PacketLeftSize:%d Pad:%d Pos:%"PRId64"\n", asf->packet_size_left, asf->packet_padsize, url_ftell(pb));
717 asf->packet_pos= url_ftell(&s->pb);
718 if (asf->data_object_size != (uint64_t)-1 &&
719 (asf->packet_pos - asf->data_object_offset >= asf->data_object_size))
720 return AVERROR_IO; /* Do not exceed the size of the data object */
721 ret = asf_get_packet(s);
722 //printf("READ ASF PACKET %d r:%d c:%d\n", ret, asf->packet_size_left, pc++);
724 assert(asf->packet_size_left < FRAME_HEADER_SIZE || asf->packet_segments < 1);
725 asf->packet_time_start = 0;
728 if (asf->packet_time_start == 0) {
729 if(asf_read_frame_header(s) < 0){
730 asf->packet_segments= 0;
733 if (asf->stream_index < 0
734 || s->streams[asf->stream_index]->discard >= AVDISCARD_ALL
735 || (!asf->packet_key_frame && s->streams[asf->stream_index]->discard >= AVDISCARD_NONKEY)
737 asf->packet_time_start = 0;
738 /* unhandled packet (should not happen) */
739 url_fskip(pb, asf->packet_frag_size);
740 asf->packet_size_left -= asf->packet_frag_size;
741 if(asf->stream_index < 0)
742 av_log(s, AV_LOG_ERROR, "ff asf skip %d (unknown stream)\n", asf->packet_frag_size);
745 asf->asf_st = s->streams[asf->stream_index]->priv_data;
747 asf_st = asf->asf_st;
749 if (asf->packet_replic_size == 1) {
750 // frag_offset is here used as the begining timestamp
751 asf->packet_frag_timestamp = asf->packet_time_start;
752 asf->packet_time_start += asf->packet_time_delta;
753 asf->packet_obj_size = asf->packet_frag_size = get_byte(pb);
754 asf->packet_size_left--;
755 asf->packet_multi_size--;
756 if (asf->packet_multi_size < asf->packet_obj_size)
758 asf->packet_time_start = 0;
759 url_fskip(pb, asf->packet_multi_size);
760 asf->packet_size_left -= asf->packet_multi_size;
763 asf->packet_multi_size -= asf->packet_obj_size;
764 //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);
766 if ( asf_st->pkt.size != asf->packet_obj_size
767 || asf_st->frag_offset + asf->packet_frag_size > asf_st->pkt.size) { //FIXME is this condition sufficient?
768 if(asf_st->pkt.data){
769 av_log(s, AV_LOG_INFO, "freeing incomplete packet size %d, new %d\n", asf_st->pkt.size, asf->packet_obj_size);
770 asf_st->frag_offset = 0;
771 av_free_packet(&asf_st->pkt);
774 av_new_packet(&asf_st->pkt, asf->packet_obj_size);
775 asf_st->seq = asf->packet_seq;
776 asf_st->pkt.pts = asf->packet_frag_timestamp;
777 asf_st->pkt.stream_index = asf->stream_index;
779 asf_st->packet_pos= asf->packet_pos;
780 //printf("new packet: stream:%d key:%d packet_key:%d audio:%d size:%d\n",
781 //asf->stream_index, asf->packet_key_frame, asf_st->pkt.flags & PKT_FLAG_KEY,
782 //s->streams[asf->stream_index]->codec->codec_type == CODEC_TYPE_AUDIO, asf->packet_obj_size);
783 if (s->streams[asf->stream_index]->codec->codec_type == CODEC_TYPE_AUDIO)
784 asf->packet_key_frame = 1;
785 if (asf->packet_key_frame)
786 asf_st->pkt.flags |= PKT_FLAG_KEY;
790 //printf("READ PACKET s:%d os:%d o:%d,%d l:%d DATA:%p\n",
791 // asf->packet_size, asf_st->pkt.size, asf->packet_frag_offset,
792 // asf_st->frag_offset, asf->packet_frag_size, asf_st->pkt.data);
793 asf->packet_size_left -= asf->packet_frag_size;
794 if (asf->packet_size_left < 0)
797 if( asf->packet_frag_offset >= asf_st->pkt.size
798 || asf->packet_frag_size > asf_st->pkt.size - asf->packet_frag_offset){
799 av_log(s, AV_LOG_ERROR, "packet fragment position invalid %u,%u not in %u\n",
800 asf->packet_frag_offset, asf->packet_frag_size, asf_st->pkt.size);
804 get_buffer(pb, asf_st->pkt.data + asf->packet_frag_offset,
805 asf->packet_frag_size);
806 asf_st->frag_offset += asf->packet_frag_size;
807 /* test if whole packet is read */
808 if (asf_st->frag_offset == asf_st->pkt.size) {
810 if (asf_st->ds_span > 1) {
811 if(asf_st->pkt.size != asf_st->ds_packet_size * asf_st->ds_span){
812 av_log(s, AV_LOG_ERROR, "pkt.size != ds_packet_size * ds_span\n");
814 /* packet descrambling */
815 uint8_t *newdata = av_malloc(asf_st->pkt.size);
818 while (offset < asf_st->pkt.size) {
819 int off = offset / asf_st->ds_chunk_size;
820 int row = off / asf_st->ds_span;
821 int col = off % asf_st->ds_span;
822 int idx = row + col * asf_st->ds_packet_size / asf_st->ds_chunk_size;
823 //printf("off:%d row:%d col:%d idx:%d\n", off, row, col, idx);
825 assert(offset + asf_st->ds_chunk_size <= asf_st->pkt.size);
826 assert(idx+1 <= asf_st->pkt.size / asf_st->ds_chunk_size);
827 memcpy(newdata + offset,
828 asf_st->pkt.data + idx * asf_st->ds_chunk_size,
829 asf_st->ds_chunk_size);
830 offset += asf_st->ds_chunk_size;
832 av_free(asf_st->pkt.data);
833 asf_st->pkt.data = newdata;
837 asf_st->frag_offset = 0;
839 //printf("packet %d %d\n", asf_st->pkt.size, asf->packet_frag_size);
840 asf_st->pkt.size = 0;
841 asf_st->pkt.data = 0;
842 break; // packet completed
848 static int asf_read_close(AVFormatContext *s)
852 for(i=0;i<s->nb_streams;i++) {
853 AVStream *st = s->streams[i];
854 av_free(st->priv_data);
855 av_free(st->codec->palctrl);
860 // Added to support seeking after packets have been read
861 // If information is not reset, read_packet fails due to
862 // leftover information from previous reads
863 static void asf_reset_header(AVFormatContext *s)
865 ASFContext *asf = s->priv_data;
869 asf->packet_nb_frames = 0;
870 asf->packet_size_left = 0;
871 asf->packet_segments = 0;
872 asf->packet_flags = 0;
873 asf->packet_property = 0;
874 asf->packet_timestamp = 0;
875 asf->packet_segsizetype = 0;
876 asf->packet_segments = 0;
878 asf->packet_replic_size = 0;
879 asf->packet_key_frame = 0;
880 asf->packet_padsize = 0;
881 asf->packet_frag_offset = 0;
882 asf->packet_frag_size = 0;
883 asf->packet_frag_timestamp = 0;
884 asf->packet_multi_size = 0;
885 asf->packet_obj_size = 0;
886 asf->packet_time_delta = 0;
887 asf->packet_time_start = 0;
889 for(i=0; i<s->nb_streams; i++){
890 asf_st= s->streams[i]->priv_data;
891 av_free_packet(&asf_st->pkt);
892 asf_st->frag_offset=0;
898 static int64_t asf_read_pts(AVFormatContext *s, int stream_index, int64_t *ppos, int64_t pos_limit)
900 ASFContext *asf = s->priv_data;
901 AVPacket pkt1, *pkt = &pkt1;
906 int64_t start_pos[s->nb_streams];
908 for(i=0; i<s->nb_streams; i++){
912 pos= (pos+asf->packet_size-1-s->data_offset)/asf->packet_size*asf->packet_size+ s->data_offset;
914 url_fseek(&s->pb, pos, SEEK_SET);
916 //printf("asf_read_pts\n");
919 if (av_read_frame(s, pkt) < 0){
920 av_log(s, AV_LOG_INFO, "asf_read_pts failed\n");
921 return AV_NOPTS_VALUE;
927 if(pkt->flags&PKT_FLAG_KEY){
928 i= pkt->stream_index;
930 asf_st= s->streams[i]->priv_data;
932 // assert((asf_st->packet_pos - s->data_offset) % asf->packet_size == 0);
933 pos= asf_st->packet_pos;
935 av_add_index_entry(s->streams[i], pos, pts, pkt->size, pos - start_pos[i] + 1, AVINDEX_KEYFRAME);
936 start_pos[i]= asf_st->packet_pos + 1;
938 if(pkt->stream_index == stream_index)
944 //printf("found keyframe at %"PRId64" stream %d stamp:%"PRId64"\n", *ppos, stream_index, pts);
949 static void asf_build_simple_index(AVFormatContext *s, int stream_index)
952 ASFContext *asf = s->priv_data;
953 int64_t gsize, itime;
954 int64_t pos, current_pos, index_pts;
958 current_pos = url_ftell(&s->pb);
960 url_fseek(&s->pb, asf->data_object_offset + asf->data_object_size, SEEK_SET);
961 get_guid(&s->pb, &g);
962 if (!memcmp(&g, &index_guid, sizeof(GUID))) {
963 gsize = get_le64(&s->pb);
964 get_guid(&s->pb, &g);
965 itime=get_le64(&s->pb);
966 pct=get_le32(&s->pb);
967 ict=get_le32(&s->pb);
968 av_log(NULL, AV_LOG_DEBUG, "itime:0x%"PRIx64", pct:%d, ict:%d\n",itime,pct,ict);
971 int pktnum=get_le32(&s->pb);
972 int pktct =get_le16(&s->pb);
973 av_log(NULL, AV_LOG_DEBUG, "pktnum:%d, pktct:%d\n", pktnum, pktct);
975 pos=s->data_offset + asf->packet_size*(int64_t)pktnum;
976 index_pts=av_rescale(itime, i, 10000);
978 av_add_index_entry(s->streams[stream_index], pos, index_pts, asf->packet_size, 0, AVINDEX_KEYFRAME);
982 url_fseek(&s->pb, current_pos, SEEK_SET);
985 static int asf_read_seek(AVFormatContext *s, int stream_index, int64_t pts, int flags)
987 ASFContext *asf = s->priv_data;
988 AVStream *st = s->streams[stream_index];
992 if (asf->packet_size <= 0)
995 if (!asf->index_read)
996 asf_build_simple_index(s, stream_index);
998 if(!(asf->index_read && st->index_entries)){
999 if(av_seek_frame_binary(s, stream_index, pts, flags)<0)
1002 index= av_index_search_timestamp(st, pts, flags);
1006 /* find the position */
1007 pos = st->index_entries[index].pos;
1008 pts = st->index_entries[index].timestamp;
1010 // various attempts to find key frame have failed so far
1011 // asf_reset_header(s);
1012 // url_fseek(&s->pb, pos, SEEK_SET);
1014 // for(i=0;i<16;i++){
1015 // pos = url_ftell(&s->pb);
1016 // if (av_read_frame(s, &pkt) < 0){
1017 // av_log(s, AV_LOG_INFO, "seek failed\n");
1020 // asf_st = s->streams[stream_index]->priv_data;
1021 // pos += st->parser->frame_offset;
1023 // if (pkt.size > b) {
1028 // av_free_packet(&pkt);
1032 av_log(NULL, AV_LOG_DEBUG, "SEEKTO: %"PRId64"\n", pos);
1033 url_fseek(&s->pb, pos, SEEK_SET);
1035 asf_reset_header(s);
1039 AVInputFormat asf_demuxer = {