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;
199 int64_t pos1, pos2, start_time;
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 start_time = asf->hdr.preroll;
214 if(!(asf->hdr.flags & 0x01)) { // if we aren't streaming...
215 st->duration = asf->hdr.send_time /
216 (10000000 / 1000) - start_time;
220 test_for_ext_stream_audio = 0;
221 if (!memcmp(&g, &audio_stream, sizeof(GUID))) {
222 type = CODEC_TYPE_AUDIO;
223 } else if (!memcmp(&g, &video_stream, sizeof(GUID))) {
224 type = CODEC_TYPE_VIDEO;
225 } else if (!memcmp(&g, &command_stream, sizeof(GUID))) {
226 type = CODEC_TYPE_UNKNOWN;
227 } else if (!memcmp(&g, &ext_stream_embed_stream_header, sizeof(GUID))) {
228 test_for_ext_stream_audio = 1;
229 type = CODEC_TYPE_UNKNOWN;
234 total_size = get_le64(pb);
235 type_specific_size = get_le32(pb);
237 st->id = get_le16(pb) & 0x7f; /* stream id */
238 // mapping of asf ID to AV stream ID;
239 asf->asfid2avid[st->id] = s->nb_streams - 1;
243 if (test_for_ext_stream_audio) {
245 if (!memcmp(&g, &ext_stream_audio_stream, sizeof(GUID))) {
246 type = CODEC_TYPE_AUDIO;
257 st->codec->codec_type = type;
258 if (type == CODEC_TYPE_AUDIO) {
259 get_wav_header(pb, st->codec, type_specific_size);
260 if (is_dvr_ms_audio) {
261 // codec_id and codec_tag are unreliable in dvr_ms
262 // files. Set them later by probing stream.
263 st->codec->codec_id = CODEC_ID_NONE;
264 st->codec->codec_tag = 0;
266 st->need_parsing = AVSTREAM_PARSE_FULL;
267 /* We have to init the frame size at some point .... */
268 pos2 = url_ftell(pb);
269 if (gsize >= (pos2 + 8 - pos1 + 24)) {
270 asf_st->ds_span = get_byte(pb);
271 asf_st->ds_packet_size = get_le16(pb);
272 asf_st->ds_chunk_size = get_le16(pb);
273 get_le16(pb); //ds_data_size
274 get_byte(pb); //ds_silence_data
276 //printf("Descrambling: ps:%d cs:%d ds:%d s:%d sd:%d\n",
277 // asf_st->ds_packet_size, asf_st->ds_chunk_size,
278 // asf_st->ds_data_size, asf_st->ds_span, asf_st->ds_silence_data);
279 if (asf_st->ds_span > 1) {
280 if (!asf_st->ds_chunk_size
281 || (asf_st->ds_packet_size/asf_st->ds_chunk_size <= 1)
282 || asf_st->ds_packet_size % asf_st->ds_chunk_size)
283 asf_st->ds_span = 0; // disable descrambling
285 switch (st->codec->codec_id) {
287 st->codec->frame_size = MPA_FRAME_SIZE;
289 case CODEC_ID_PCM_S16LE:
290 case CODEC_ID_PCM_S16BE:
291 case CODEC_ID_PCM_U16LE:
292 case CODEC_ID_PCM_U16BE:
293 case CODEC_ID_PCM_S8:
294 case CODEC_ID_PCM_U8:
295 case CODEC_ID_PCM_ALAW:
296 case CODEC_ID_PCM_MULAW:
297 st->codec->frame_size = 1;
300 /* This is probably wrong, but it prevents a crash later */
301 st->codec->frame_size = 1;
304 } else if (type == CODEC_TYPE_VIDEO) {
308 size = get_le16(pb); /* size */
309 sizeX= get_le32(pb); /* size */
310 st->codec->width = get_le32(pb);
311 st->codec->height = get_le32(pb);
312 /* not available for asf */
313 get_le16(pb); /* panes */
314 st->codec->bits_per_sample = get_le16(pb); /* depth */
317 // av_log(NULL, AV_LOG_DEBUG, "size:%d tsize:%d sizeX:%d\n", size, total_size, sizeX);
320 st->codec->extradata_size = size - 40;
321 st->codec->extradata = av_mallocz(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
322 get_buffer(pb, st->codec->extradata, st->codec->extradata_size);
325 /* Extract palette from extradata if bpp <= 8 */
326 /* This code assumes that extradata contains only palette */
327 /* This is true for all paletted codecs implemented in ffmpeg */
328 if (st->codec->extradata_size && (st->codec->bits_per_sample <= 8)) {
329 st->codec->palctrl = av_mallocz(sizeof(AVPaletteControl));
330 #ifdef WORDS_BIGENDIAN
331 for (i = 0; i < FFMIN(st->codec->extradata_size, AVPALETTE_SIZE)/4; i++)
332 st->codec->palctrl->palette[i] = bswap_32(((uint32_t*)st->codec->extradata)[i]);
334 memcpy(st->codec->palctrl->palette, st->codec->extradata,
335 FFMIN(st->codec->extradata_size, AVPALETTE_SIZE));
337 st->codec->palctrl->palette_changed = 1;
340 st->codec->codec_tag = tag1;
341 st->codec->codec_id = codec_get_id(codec_bmp_tags, tag1);
342 if(tag1 == MKTAG('D', 'V', 'R', ' '))
343 st->need_parsing = AVSTREAM_PARSE_FULL;
345 pos2 = url_ftell(pb);
346 url_fskip(pb, gsize - (pos2 - pos1 + 24));
347 } else if (!memcmp(&g, &comment_header, sizeof(GUID))) {
348 int len1, len2, len3, len4, len5;
355 get_str16_nolen(pb, len1, s->title , sizeof(s->title));
356 get_str16_nolen(pb, len2, s->author , sizeof(s->author));
357 get_str16_nolen(pb, len3, s->copyright, sizeof(s->copyright));
358 get_str16_nolen(pb, len4, s->comment , sizeof(s->comment));
360 } else if (!memcmp(&g, &stream_bitrate_guid, sizeof(GUID))) {
361 int stream_count = get_le16(pb);
364 // av_log(NULL, AV_LOG_ERROR, "stream bitrate properties\n");
365 // av_log(NULL, AV_LOG_ERROR, "streams %d\n", streams);
366 for(j = 0; j < stream_count; j++) {
367 int flags, bitrate, stream_id;
370 bitrate= get_le32(pb);
371 stream_id= (flags & 0x7f);
372 // av_log(NULL, AV_LOG_ERROR, "flags: 0x%x stream id %d, bitrate %d\n", flags, stream_id, bitrate);
373 asf->stream_bitrates[stream_id]= bitrate;
375 } else if (!memcmp(&g, &extended_content_header, sizeof(GUID))) {
378 desc_count = get_le16(pb);
379 for(i=0;i<desc_count;i++)
381 int name_len,value_type,value_len;
382 uint64_t value_num = 0;
385 name_len = get_le16(pb);
386 get_str16_nolen(pb, name_len, name, sizeof(name));
387 value_type = get_le16(pb);
388 value_len = get_le16(pb);
389 if ((value_type == 0) || (value_type == 1)) // unicode or byte
391 if (!strcmp(name,"WM/AlbumTitle")) get_str16_nolen(pb, value_len, s->album, sizeof(s->album));
392 else if(!strcmp(name,"WM/Genre" )) get_str16_nolen(pb, value_len, s->genre, sizeof(s->genre));
393 else if(!strcmp(name,"WM/Track")) {
395 get_str16_nolen(pb, value_len, track, sizeof(track));
396 s->track = strtol(track, NULL, 10) + 1;
398 else if(!strcmp(name,"WM/TrackNumber")) {
400 get_str16_nolen(pb, value_len, track, sizeof(track));
401 s->track = strtol(track, NULL, 10);
403 else url_fskip(pb, value_len);
405 if ((value_type >= 2) && (value_type <= 5)) // boolean or DWORD or QWORD or WORD
407 value_num= get_value(pb, value_type);
408 if (!strcmp(name,"WM/Track" )) s->track = value_num + 1;
409 if (!strcmp(name,"WM/TrackNumber")) s->track = value_num;
412 } else if (!memcmp(&g, &metadata_header, sizeof(GUID))) {
413 int n, stream_num, name_len, value_len, value_type, value_num;
419 get_le16(pb); //lang_list_index
420 stream_num= get_le16(pb);
421 name_len= get_le16(pb);
422 value_type= get_le16(pb);
423 value_len= get_le32(pb);
425 get_str16_nolen(pb, name_len, name, sizeof(name));
426 //av_log(NULL, AV_LOG_ERROR, "%d %d %d %d %d <%s>\n", i, stream_num, name_len, value_type, value_len, name);
427 value_num= get_le16(pb);//we should use get_value() here but it does not work 2 is le16 here but le32 elsewhere
428 url_fskip(pb, value_len - 2);
431 if (!strcmp(name, "AspectRatioX")) dar[stream_num].num= value_num;
432 else if(!strcmp(name, "AspectRatioY")) dar[stream_num].den= value_num;
435 } else if (!memcmp(&g, &ext_stream_header, sizeof(GUID))) {
436 int ext_len, payload_ext_ct, stream_ct;
437 uint32_t ext_d, leak_rate, stream_num;
439 pos_ex_st = url_ftell(pb);
441 get_le64(pb); // starttime
442 get_le64(pb); // endtime
443 leak_rate = get_le32(pb); // leak-datarate
444 get_le32(pb); // bucket-datasize
445 get_le32(pb); // init-bucket-fullness
446 get_le32(pb); // alt-leak-datarate
447 get_le32(pb); // alt-bucket-datasize
448 get_le32(pb); // alt-init-bucket-fullness
449 get_le32(pb); // max-object-size
450 get_le32(pb); // flags (reliable,seekable,no_cleanpoints?,resend-live-cleanpoints, rest of bits reserved)
451 stream_num = get_le16(pb); // stream-num
452 get_le16(pb); // stream-language-id-index
453 get_le64(pb); // avg frametime in 100ns units
454 stream_ct = get_le16(pb); //stream-name-count
455 payload_ext_ct = get_le16(pb); //payload-extension-system-count
457 if (stream_num < 128)
458 bitrate[stream_num] = leak_rate;
460 for (i=0; i<stream_ct; i++){
462 ext_len = get_le16(pb);
463 url_fseek(pb, ext_len, SEEK_CUR);
466 for (i=0; i<payload_ext_ct; i++){
469 ext_len=get_le32(pb);
470 url_fseek(pb, ext_len, SEEK_CUR);
473 // there could be a optional stream properties object to follow
474 // if so the next iteration will pick it up
475 } else if (!memcmp(&g, &head1_guid, sizeof(GUID))) {
481 } else if (!memcmp(&g, &codec_comment_header, sizeof(GUID))) {
491 num = get_le16(pb); /* stream number */
492 get_str16(pb, str, sizeof(str));
493 get_str16(pb, str, sizeof(str));
498 if ((q - tag) < sizeof(tag) - 1)
505 } else if (url_feof(pb)) {
508 url_fseek(pb, gsize - 24, SEEK_CUR);
517 asf->data_offset = url_ftell(pb);
518 asf->packet_size_left = 0;
521 for(i=0; i<128; i++){
522 int stream_num= asf->asfid2avid[i];
524 AVCodecContext *codec= s->streams[stream_num]->codec;
525 if (!codec->bit_rate)
526 codec->bit_rate = bitrate[i];
527 if (dar[i].num > 0 && dar[i].den > 0)
528 av_reduce(&codec->sample_aspect_ratio.num,
529 &codec->sample_aspect_ratio.den,
530 dar[i].num, dar[i].den, INT_MAX);
531 //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);
538 for(i=0;i<s->nb_streams;i++) {
539 AVStream *st = s->streams[i];
541 av_free(st->priv_data);
542 av_free(st->codec->extradata);
549 #define DO_2BITS(bits, var, defval) \
552 case 3: var = get_le32(pb); rsize += 4; break; \
553 case 2: var = get_le16(pb); rsize += 2; break; \
554 case 1: var = get_byte(pb); rsize++; break; \
555 default: var = defval; break; \
560 * @return <0 in case of an error
562 static int asf_get_packet(AVFormatContext *s)
564 ASFContext *asf = s->priv_data;
565 ByteIOContext *pb = &s->pb;
566 uint32_t packet_length, padsize;
570 off= (url_ftell(&s->pb) - s->data_offset) % asf->packet_size + 3;
576 if(c == 0x82 && !d && !e)
582 av_log(s, AV_LOG_ERROR, "ff asf bad header %x at:%"PRId64"\n", c, url_ftell(pb));
584 if ((c & 0x8f) == 0x82) {
587 av_log(s, AV_LOG_ERROR, "ff asf bad non zero\n");
594 url_fseek(pb, -1, SEEK_CUR); //FIXME
597 asf->packet_flags = c;
598 asf->packet_property = d;
600 DO_2BITS(asf->packet_flags >> 5, packet_length, asf->packet_size);
601 DO_2BITS(asf->packet_flags >> 1, padsize, 0); // sequence ignored
602 DO_2BITS(asf->packet_flags >> 3, padsize, 0); // padding length
604 //the following checks prevent overflows and infinite loops
605 if(packet_length >= (1U<<29)){
606 av_log(s, AV_LOG_ERROR, "invalid packet_length %d at:%"PRId64"\n", packet_length, url_ftell(pb));
609 if(padsize >= packet_length){
610 av_log(s, AV_LOG_ERROR, "invalid padsize %d at:%"PRId64"\n", padsize, url_ftell(pb));
614 asf->packet_timestamp = get_le32(pb);
615 get_le16(pb); /* duration */
616 // rsize has at least 11 bytes which have to be present
618 if (asf->packet_flags & 0x01) {
619 asf->packet_segsizetype = get_byte(pb); rsize++;
620 asf->packet_segments = asf->packet_segsizetype & 0x3f;
622 asf->packet_segments = 1;
623 asf->packet_segsizetype = 0x80;
625 asf->packet_size_left = packet_length - padsize - rsize;
626 if (packet_length < asf->hdr.min_pktsize)
627 padsize += asf->hdr.min_pktsize - packet_length;
628 asf->packet_padsize = padsize;
630 printf("packet: size=%d padsize=%d left=%d\n", asf->packet_size, asf->packet_padsize, asf->packet_size_left);
637 * @return <0 if error
639 static int asf_read_frame_header(AVFormatContext *s){
640 ASFContext *asf = s->priv_data;
641 ByteIOContext *pb = &s->pb;
643 int num = get_byte(pb);
646 asf->packet_segments--;
647 asf->packet_key_frame = num >> 7;
648 asf->stream_index = asf->asfid2avid[num & 0x7f];
649 // sequence should be ignored!
650 DO_2BITS(asf->packet_property >> 4, asf->packet_seq, 0);
651 DO_2BITS(asf->packet_property >> 2, asf->packet_frag_offset, 0);
652 DO_2BITS(asf->packet_property, asf->packet_replic_size, 0);
653 //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);
654 if (asf->packet_replic_size >= 8) {
655 asf->packet_obj_size = get_le32(pb);
656 if(asf->packet_obj_size >= (1<<24) || asf->packet_obj_size <= 0){
657 av_log(s, AV_LOG_ERROR, "packet_obj_size invalid\n");
660 asf->packet_frag_timestamp = get_le32(pb); // timestamp
661 if(asf->packet_replic_size >= 8+38+4){
662 // for(i=0; i<asf->packet_replic_size-8; i++)
663 // av_log(s, AV_LOG_DEBUG, "%02X ",get_byte(pb));
664 // av_log(s, AV_LOG_DEBUG, "\n");
670 url_fskip(pb, asf->packet_replic_size - 8 - 38 - 4);
671 if(ts0!= -1) asf->packet_frag_timestamp= ts0/10000;
672 else asf->packet_frag_timestamp= AV_NOPTS_VALUE;
674 url_fskip(pb, asf->packet_replic_size - 8);
675 rsize += asf->packet_replic_size; // FIXME - check validity
676 } else if (asf->packet_replic_size==1){
677 // multipacket - frag_offset is begining timestamp
678 asf->packet_time_start = asf->packet_frag_offset;
679 asf->packet_frag_offset = 0;
680 asf->packet_frag_timestamp = asf->packet_timestamp;
682 asf->packet_time_delta = get_byte(pb);
684 }else if(asf->packet_replic_size!=0){
685 av_log(s, AV_LOG_ERROR, "unexpected packet_replic_size of %d\n", asf->packet_replic_size);
688 if (asf->packet_flags & 0x01) {
689 DO_2BITS(asf->packet_segsizetype >> 6, asf->packet_frag_size, 0); // 0 is illegal
690 if(asf->packet_frag_size > asf->packet_size_left - rsize){
691 av_log(s, AV_LOG_ERROR, "packet_frag_size is invalid\n");
694 //printf("Fragsize %d\n", asf->packet_frag_size);
696 asf->packet_frag_size = asf->packet_size_left - rsize;
697 //printf("Using rest %d %d %d\n", asf->packet_frag_size, asf->packet_size_left, rsize);
699 if (asf->packet_replic_size == 1) {
700 asf->packet_multi_size = asf->packet_frag_size;
701 if (asf->packet_multi_size > asf->packet_size_left)
704 asf->packet_size_left -= rsize;
705 //printf("___objsize____ %d %d rs:%d\n", asf->packet_obj_size, asf->packet_frag_offset, rsize);
710 static int asf_read_packet(AVFormatContext *s, AVPacket *pkt)
712 ASFContext *asf = s->priv_data;
713 ASFStream *asf_st = 0;
714 ByteIOContext *pb = &s->pb;
719 if (asf->packet_size_left < FRAME_HEADER_SIZE
720 || asf->packet_segments < 1) {
721 //asf->packet_size_left <= asf->packet_padsize) {
722 int ret = asf->packet_size_left + asf->packet_padsize;
723 //printf("PacketLeftSize:%d Pad:%d Pos:%"PRId64"\n", asf->packet_size_left, asf->packet_padsize, url_ftell(pb));
728 asf->packet_pos= url_ftell(&s->pb);
729 if (asf->data_object_size != (uint64_t)-1 &&
730 (asf->packet_pos - asf->data_object_offset >= asf->data_object_size))
731 return AVERROR(EIO); /* Do not exceed the size of the data object */
732 ret = asf_get_packet(s);
733 //printf("READ ASF PACKET %d r:%d c:%d\n", ret, asf->packet_size_left, pc++);
735 assert(asf->packet_size_left < FRAME_HEADER_SIZE || asf->packet_segments < 1);
736 asf->packet_time_start = 0;
739 if (asf->packet_time_start == 0) {
740 if(asf_read_frame_header(s) < 0){
741 asf->packet_segments= 0;
744 if (asf->stream_index < 0
745 || s->streams[asf->stream_index]->discard >= AVDISCARD_ALL
746 || (!asf->packet_key_frame && s->streams[asf->stream_index]->discard >= AVDISCARD_NONKEY)
748 asf->packet_time_start = 0;
749 /* unhandled packet (should not happen) */
750 url_fskip(pb, asf->packet_frag_size);
751 asf->packet_size_left -= asf->packet_frag_size;
752 if(asf->stream_index < 0)
753 av_log(s, AV_LOG_ERROR, "ff asf skip %d (unknown stream)\n", asf->packet_frag_size);
756 asf->asf_st = s->streams[asf->stream_index]->priv_data;
758 asf_st = asf->asf_st;
760 if (asf->packet_replic_size == 1) {
761 // frag_offset is here used as the begining timestamp
762 asf->packet_frag_timestamp = asf->packet_time_start;
763 asf->packet_time_start += asf->packet_time_delta;
764 asf->packet_obj_size = asf->packet_frag_size = get_byte(pb);
765 asf->packet_size_left--;
766 asf->packet_multi_size--;
767 if (asf->packet_multi_size < asf->packet_obj_size)
769 asf->packet_time_start = 0;
770 url_fskip(pb, asf->packet_multi_size);
771 asf->packet_size_left -= asf->packet_multi_size;
774 asf->packet_multi_size -= asf->packet_obj_size;
775 //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);
777 if( /*asf->packet_frag_size == asf->packet_obj_size*/
778 asf_st->frag_offset + asf->packet_frag_size <= asf_st->pkt.size
779 && asf_st->frag_offset + asf->packet_frag_size > asf->packet_obj_size){
780 av_log(s, AV_LOG_INFO, "ignoring invalid packet_obj_size (%d %d %d %d)\n",
781 asf_st->frag_offset, asf->packet_frag_size,
782 asf->packet_obj_size, asf_st->pkt.size);
783 asf->packet_obj_size= asf_st->pkt.size;
786 if ( asf_st->pkt.size != asf->packet_obj_size
787 || asf_st->frag_offset + asf->packet_frag_size > asf_st->pkt.size) { //FIXME is this condition sufficient?
788 if(asf_st->pkt.data){
789 av_log(s, AV_LOG_INFO, "freeing incomplete packet size %d, new %d\n", asf_st->pkt.size, asf->packet_obj_size);
790 asf_st->frag_offset = 0;
791 av_free_packet(&asf_st->pkt);
794 av_new_packet(&asf_st->pkt, asf->packet_obj_size);
795 asf_st->seq = asf->packet_seq;
796 asf_st->pkt.pts = asf->packet_frag_timestamp;
797 asf_st->pkt.stream_index = asf->stream_index;
799 asf_st->packet_pos= asf->packet_pos;
800 //printf("new packet: stream:%d key:%d packet_key:%d audio:%d size:%d\n",
801 //asf->stream_index, asf->packet_key_frame, asf_st->pkt.flags & PKT_FLAG_KEY,
802 //s->streams[asf->stream_index]->codec->codec_type == CODEC_TYPE_AUDIO, asf->packet_obj_size);
803 if (s->streams[asf->stream_index]->codec->codec_type == CODEC_TYPE_AUDIO)
804 asf->packet_key_frame = 1;
805 if (asf->packet_key_frame)
806 asf_st->pkt.flags |= PKT_FLAG_KEY;
810 //printf("READ PACKET s:%d os:%d o:%d,%d l:%d DATA:%p\n",
811 // asf->packet_size, asf_st->pkt.size, asf->packet_frag_offset,
812 // asf_st->frag_offset, asf->packet_frag_size, asf_st->pkt.data);
813 asf->packet_size_left -= asf->packet_frag_size;
814 if (asf->packet_size_left < 0)
817 if( asf->packet_frag_offset >= asf_st->pkt.size
818 || asf->packet_frag_size > asf_st->pkt.size - asf->packet_frag_offset){
819 av_log(s, AV_LOG_ERROR, "packet fragment position invalid %u,%u not in %u\n",
820 asf->packet_frag_offset, asf->packet_frag_size, asf_st->pkt.size);
824 get_buffer(pb, asf_st->pkt.data + asf->packet_frag_offset,
825 asf->packet_frag_size);
826 asf_st->frag_offset += asf->packet_frag_size;
827 /* test if whole packet is read */
828 if (asf_st->frag_offset == asf_st->pkt.size) {
829 //workaround for macroshit radio DVR-MS files
830 if( s->streams[asf->stream_index]->codec->codec_id == CODEC_ID_MPEG2VIDEO
831 && asf_st->pkt.size > 100){
833 for(i=0; i<asf_st->pkt.size && !asf_st->pkt.data[i]; i++);
834 if(i == asf_st->pkt.size){
835 av_log(s, AV_LOG_DEBUG, "discarding ms fart\n");
836 asf_st->frag_offset = 0;
837 av_free_packet(&asf_st->pkt);
843 if (asf_st->ds_span > 1) {
844 if(asf_st->pkt.size != asf_st->ds_packet_size * asf_st->ds_span){
845 av_log(s, AV_LOG_ERROR, "pkt.size != ds_packet_size * ds_span (%d %d %d)\n", asf_st->pkt.size, asf_st->ds_packet_size, asf_st->ds_span);
847 /* packet descrambling */
848 uint8_t *newdata = av_malloc(asf_st->pkt.size);
851 while (offset < asf_st->pkt.size) {
852 int off = offset / asf_st->ds_chunk_size;
853 int row = off / asf_st->ds_span;
854 int col = off % asf_st->ds_span;
855 int idx = row + col * asf_st->ds_packet_size / asf_st->ds_chunk_size;
856 //printf("off:%d row:%d col:%d idx:%d\n", off, row, col, idx);
858 assert(offset + asf_st->ds_chunk_size <= asf_st->pkt.size);
859 assert(idx+1 <= asf_st->pkt.size / asf_st->ds_chunk_size);
860 memcpy(newdata + offset,
861 asf_st->pkt.data + idx * asf_st->ds_chunk_size,
862 asf_st->ds_chunk_size);
863 offset += asf_st->ds_chunk_size;
865 av_free(asf_st->pkt.data);
866 asf_st->pkt.data = newdata;
870 asf_st->frag_offset = 0;
872 //printf("packet %d %d\n", asf_st->pkt.size, asf->packet_frag_size);
873 asf_st->pkt.size = 0;
874 asf_st->pkt.data = 0;
875 break; // packet completed
881 static int asf_read_close(AVFormatContext *s)
885 for(i=0;i<s->nb_streams;i++) {
886 AVStream *st = s->streams[i];
887 av_free(st->priv_data);
888 av_free(st->codec->palctrl);
893 // Added to support seeking after packets have been read
894 // If information is not reset, read_packet fails due to
895 // leftover information from previous reads
896 static void asf_reset_header(AVFormatContext *s)
898 ASFContext *asf = s->priv_data;
902 asf->packet_nb_frames = 0;
903 asf->packet_size_left = 0;
904 asf->packet_segments = 0;
905 asf->packet_flags = 0;
906 asf->packet_property = 0;
907 asf->packet_timestamp = 0;
908 asf->packet_segsizetype = 0;
909 asf->packet_segments = 0;
911 asf->packet_replic_size = 0;
912 asf->packet_key_frame = 0;
913 asf->packet_padsize = 0;
914 asf->packet_frag_offset = 0;
915 asf->packet_frag_size = 0;
916 asf->packet_frag_timestamp = 0;
917 asf->packet_multi_size = 0;
918 asf->packet_obj_size = 0;
919 asf->packet_time_delta = 0;
920 asf->packet_time_start = 0;
922 for(i=0; i<s->nb_streams; i++){
923 asf_st= s->streams[i]->priv_data;
924 av_free_packet(&asf_st->pkt);
925 asf_st->frag_offset=0;
931 static int64_t asf_read_pts(AVFormatContext *s, int stream_index, int64_t *ppos, int64_t pos_limit)
933 ASFContext *asf = s->priv_data;
934 AVPacket pkt1, *pkt = &pkt1;
939 int64_t start_pos[s->nb_streams];
941 for(i=0; i<s->nb_streams; i++){
945 pos= (pos+asf->packet_size-1-s->data_offset)/asf->packet_size*asf->packet_size+ s->data_offset;
947 url_fseek(&s->pb, pos, SEEK_SET);
949 //printf("asf_read_pts\n");
952 if (av_read_frame(s, pkt) < 0){
953 av_log(s, AV_LOG_INFO, "asf_read_pts failed\n");
954 return AV_NOPTS_VALUE;
960 if(pkt->flags&PKT_FLAG_KEY){
961 i= pkt->stream_index;
963 asf_st= s->streams[i]->priv_data;
965 // assert((asf_st->packet_pos - s->data_offset) % asf->packet_size == 0);
966 pos= asf_st->packet_pos;
968 av_add_index_entry(s->streams[i], pos, pts, pkt->size, pos - start_pos[i] + 1, AVINDEX_KEYFRAME);
969 start_pos[i]= asf_st->packet_pos + 1;
971 if(pkt->stream_index == stream_index)
977 //printf("found keyframe at %"PRId64" stream %d stamp:%"PRId64"\n", *ppos, stream_index, pts);
982 static void asf_build_simple_index(AVFormatContext *s, int stream_index)
985 ASFContext *asf = s->priv_data;
986 int64_t gsize, itime;
987 int64_t pos, current_pos, index_pts;
991 current_pos = url_ftell(&s->pb);
993 url_fseek(&s->pb, asf->data_object_offset + asf->data_object_size, SEEK_SET);
994 get_guid(&s->pb, &g);
995 if (!memcmp(&g, &index_guid, sizeof(GUID))) {
996 gsize = get_le64(&s->pb);
997 get_guid(&s->pb, &g);
998 itime=get_le64(&s->pb);
999 pct=get_le32(&s->pb);
1000 ict=get_le32(&s->pb);
1001 av_log(NULL, AV_LOG_DEBUG, "itime:0x%"PRIx64", pct:%d, ict:%d\n",itime,pct,ict);
1003 for (i=0;i<ict;i++){
1004 int pktnum=get_le32(&s->pb);
1005 int pktct =get_le16(&s->pb);
1006 av_log(NULL, AV_LOG_DEBUG, "pktnum:%d, pktct:%d\n", pktnum, pktct);
1008 pos=s->data_offset + asf->packet_size*(int64_t)pktnum;
1009 index_pts=av_rescale(itime, i, 10000);
1011 av_add_index_entry(s->streams[stream_index], pos, index_pts, asf->packet_size, 0, AVINDEX_KEYFRAME);
1015 url_fseek(&s->pb, current_pos, SEEK_SET);
1018 static int asf_read_seek(AVFormatContext *s, int stream_index, int64_t pts, int flags)
1020 ASFContext *asf = s->priv_data;
1021 AVStream *st = s->streams[stream_index];
1025 if (asf->packet_size <= 0)
1028 if (!asf->index_read)
1029 asf_build_simple_index(s, stream_index);
1031 if(!(asf->index_read && st->index_entries)){
1032 if(av_seek_frame_binary(s, stream_index, pts, flags)<0)
1035 index= av_index_search_timestamp(st, pts, flags);
1039 /* find the position */
1040 pos = st->index_entries[index].pos;
1041 pts = st->index_entries[index].timestamp;
1043 // various attempts to find key frame have failed so far
1044 // asf_reset_header(s);
1045 // url_fseek(&s->pb, pos, SEEK_SET);
1047 // for(i=0;i<16;i++){
1048 // pos = url_ftell(&s->pb);
1049 // if (av_read_frame(s, &pkt) < 0){
1050 // av_log(s, AV_LOG_INFO, "seek failed\n");
1053 // asf_st = s->streams[stream_index]->priv_data;
1054 // pos += st->parser->frame_offset;
1056 // if (pkt.size > b) {
1061 // av_free_packet(&pkt);
1065 av_log(NULL, AV_LOG_DEBUG, "SEEKTO: %"PRId64"\n", pos);
1066 url_fseek(&s->pb, pos, SEEK_SET);
1068 asf_reset_header(s);
1072 AVInputFormat asf_demuxer = {