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"
31 #define FRAME_HEADER_SIZE 17
32 // Fix Me! FRAME_HEADER_SIZE may be different.
34 static const GUID index_guid = {
35 0x90, 0x08, 0x00, 0x33, 0xb1, 0xe5, 0xcf, 0x11, 0x89, 0xf4, 0x00, 0xa0, 0xc9, 0x03, 0x49, 0xcb
38 static const GUID stream_bitrate_guid = { /* (http://get.to/sdp) */
39 0xce, 0x75, 0xf8, 0x7b, 0x8d, 0x46, 0xd1, 0x11, 0x8d, 0x82, 0x00, 0x60, 0x97, 0xc9, 0xa2, 0xb2
41 /**********************************/
47 #define PRINT_IF_GUID(g,cmp) \
48 if (!memcmp(g, &cmp, sizeof(GUID))) \
49 printf("(GUID: %s) ", #cmp)
51 static void print_guid(const GUID *g)
54 PRINT_IF_GUID(g, asf_header);
55 else PRINT_IF_GUID(g, file_header);
56 else PRINT_IF_GUID(g, stream_header);
57 else PRINT_IF_GUID(g, audio_stream);
58 else PRINT_IF_GUID(g, audio_conceal_none);
59 else PRINT_IF_GUID(g, video_stream);
60 else PRINT_IF_GUID(g, video_conceal_none);
61 else PRINT_IF_GUID(g, command_stream);
62 else PRINT_IF_GUID(g, comment_header);
63 else PRINT_IF_GUID(g, codec_comment_header);
64 else PRINT_IF_GUID(g, codec_comment1_header);
65 else PRINT_IF_GUID(g, data_header);
66 else PRINT_IF_GUID(g, index_guid);
67 else PRINT_IF_GUID(g, head1_guid);
68 else PRINT_IF_GUID(g, head2_guid);
69 else PRINT_IF_GUID(g, my_guid);
70 else PRINT_IF_GUID(g, ext_stream_header);
71 else PRINT_IF_GUID(g, extended_content_header);
72 else PRINT_IF_GUID(g, ext_stream_embed_stream_header);
73 else PRINT_IF_GUID(g, ext_stream_audio_stream);
74 else PRINT_IF_GUID(g, metadata_header);
75 else PRINT_IF_GUID(g, stream_bitrate_guid);
77 printf("(GUID: unknown) ");
79 printf(" 0x%02x,", (*g)[i]);
85 static void get_guid(ByteIOContext *s, GUID *g)
87 assert(sizeof(*g) == 16);
88 get_buffer(s, g, sizeof(*g));
92 static void get_str16(ByteIOContext *pb, char *buf, int buf_size)
101 if ((q - buf) < buf_size - 1)
109 static void get_str16_nolen(ByteIOContext *pb, int len, char *buf, int buf_size)
115 PUT_UTF8(get_le16(pb), tmp, if (q - buf < buf_size - 1) *q++ = tmp;)
120 static int asf_probe(AVProbeData *pd)
122 /* check file header */
123 if (!memcmp(pd->buf, &asf_header, sizeof(GUID)))
124 return AVPROBE_SCORE_MAX;
129 static int get_value(ByteIOContext *pb, int type){
131 case 2: return get_le32(pb);
132 case 3: return get_le32(pb);
133 case 4: return get_le64(pb);
134 case 5: return get_le16(pb);
135 default:return INT_MIN;
139 static int asf_read_header(AVFormatContext *s, AVFormatParameters *ap)
141 ASFContext *asf = s->priv_data;
143 ByteIOContext *pb = &s->pb;
149 uint32_t bitrate[128];
151 memset(dar, 0, sizeof(dar));
152 memset(bitrate, 0, sizeof(bitrate));
155 if (memcmp(&g, &asf_header, sizeof(GUID)))
161 memset(&asf->asfid2avid, -1, sizeof(asf->asfid2avid));
164 gsize = get_le64(pb);
166 printf("%08"PRIx64": ", url_ftell(pb) - 24);
168 printf(" size=0x%"PRIx64"\n", gsize);
170 if (!memcmp(&g, &data_header, sizeof(GUID))) {
171 asf->data_object_offset = url_ftell(pb);
172 // if not streaming, gsize is not unlimited (how?), and there is enough space in the file..
173 if (!(asf->hdr.flags & 0x01) && gsize >= 100) {
174 asf->data_object_size = gsize - 24;
176 asf->data_object_size = (uint64_t)-1;
182 if (!memcmp(&g, &file_header, sizeof(GUID))) {
183 get_guid(pb, &asf->hdr.guid);
184 asf->hdr.file_size = get_le64(pb);
185 asf->hdr.create_time = get_le64(pb);
186 asf->nb_packets = get_le64(pb);
187 asf->hdr.send_time = get_le64(pb);
188 asf->hdr.play_time = get_le64(pb);
189 asf->hdr.preroll = get_le32(pb);
190 asf->hdr.ignore = get_le32(pb);
191 asf->hdr.flags = get_le32(pb);
192 asf->hdr.min_pktsize = get_le32(pb);
193 asf->hdr.max_pktsize = get_le32(pb);
194 asf->hdr.max_bitrate = get_le32(pb);
195 asf->packet_size = asf->hdr.max_pktsize;
196 } else if (!memcmp(&g, &stream_header, sizeof(GUID))) {
197 int type, type_specific_size, sizeX;
200 int64_t pos1, pos2, start_time;
201 int test_for_ext_stream_audio, is_dvr_ms_audio=0;
203 pos1 = url_ftell(pb);
205 st = av_new_stream(s, 0);
208 av_set_pts_info(st, 32, 1, 1000); /* 32 bit pts in ms */
209 asf_st = av_mallocz(sizeof(ASFStream));
212 st->priv_data = asf_st;
213 start_time = asf->hdr.preroll;
215 if(!(asf->hdr.flags & 0x01)) { // if we aren't streaming...
216 st->duration = asf->hdr.send_time /
217 (10000000 / 1000) - start_time;
221 test_for_ext_stream_audio = 0;
222 if (!memcmp(&g, &audio_stream, sizeof(GUID))) {
223 type = CODEC_TYPE_AUDIO;
224 } else if (!memcmp(&g, &video_stream, sizeof(GUID))) {
225 type = CODEC_TYPE_VIDEO;
226 } else if (!memcmp(&g, &command_stream, sizeof(GUID))) {
227 type = CODEC_TYPE_UNKNOWN;
228 } else if (!memcmp(&g, &ext_stream_embed_stream_header, sizeof(GUID))) {
229 test_for_ext_stream_audio = 1;
230 type = CODEC_TYPE_UNKNOWN;
235 total_size = get_le64(pb);
236 type_specific_size = get_le32(pb);
238 st->id = get_le16(pb) & 0x7f; /* stream id */
239 // mapping of asf ID to AV stream ID;
240 asf->asfid2avid[st->id] = s->nb_streams - 1;
244 if (test_for_ext_stream_audio) {
246 if (!memcmp(&g, &ext_stream_audio_stream, sizeof(GUID))) {
247 type = CODEC_TYPE_AUDIO;
258 st->codec->codec_type = type;
259 if (type == CODEC_TYPE_AUDIO) {
260 get_wav_header(pb, st->codec, type_specific_size);
261 if (is_dvr_ms_audio) {
262 // codec_id and codec_tag are unreliable in dvr_ms
263 // files. Set them later by probing stream.
264 st->codec->codec_id = CODEC_ID_NONE;
265 st->codec->codec_tag = 0;
267 st->need_parsing = AVSTREAM_PARSE_FULL;
268 /* We have to init the frame size at some point .... */
269 pos2 = url_ftell(pb);
270 if (gsize >= (pos2 + 8 - pos1 + 24)) {
271 asf_st->ds_span = get_byte(pb);
272 asf_st->ds_packet_size = get_le16(pb);
273 asf_st->ds_chunk_size = get_le16(pb);
274 get_le16(pb); //ds_data_size
275 get_byte(pb); //ds_silence_data
277 //printf("Descrambling: ps:%d cs:%d ds:%d s:%d sd:%d\n",
278 // asf_st->ds_packet_size, asf_st->ds_chunk_size,
279 // asf_st->ds_data_size, asf_st->ds_span, asf_st->ds_silence_data);
280 if (asf_st->ds_span > 1) {
281 if (!asf_st->ds_chunk_size
282 || (asf_st->ds_packet_size/asf_st->ds_chunk_size <= 1)
283 || asf_st->ds_packet_size % asf_st->ds_chunk_size)
284 asf_st->ds_span = 0; // disable descrambling
286 switch (st->codec->codec_id) {
288 st->codec->frame_size = MPA_FRAME_SIZE;
290 case CODEC_ID_PCM_S16LE:
291 case CODEC_ID_PCM_S16BE:
292 case CODEC_ID_PCM_U16LE:
293 case CODEC_ID_PCM_U16BE:
294 case CODEC_ID_PCM_S8:
295 case CODEC_ID_PCM_U8:
296 case CODEC_ID_PCM_ALAW:
297 case CODEC_ID_PCM_MULAW:
298 st->codec->frame_size = 1;
301 /* This is probably wrong, but it prevents a crash later */
302 st->codec->frame_size = 1;
305 } else if (type == CODEC_TYPE_VIDEO) {
309 size = get_le16(pb); /* size */
310 sizeX= get_le32(pb); /* size */
311 st->codec->width = get_le32(pb);
312 st->codec->height = get_le32(pb);
313 /* not available for asf */
314 get_le16(pb); /* panes */
315 st->codec->bits_per_sample = get_le16(pb); /* depth */
318 // av_log(NULL, AV_LOG_DEBUG, "size:%d tsize:%d sizeX:%d\n", size, total_size, sizeX);
321 st->codec->extradata_size = size - 40;
322 st->codec->extradata = av_mallocz(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
323 get_buffer(pb, st->codec->extradata, st->codec->extradata_size);
326 /* Extract palette from extradata if bpp <= 8 */
327 /* This code assumes that extradata contains only palette */
328 /* This is true for all paletted codecs implemented in ffmpeg */
329 if (st->codec->extradata_size && (st->codec->bits_per_sample <= 8)) {
330 st->codec->palctrl = av_mallocz(sizeof(AVPaletteControl));
331 #ifdef WORDS_BIGENDIAN
332 for (i = 0; i < FFMIN(st->codec->extradata_size, AVPALETTE_SIZE)/4; i++)
333 st->codec->palctrl->palette[i] = bswap_32(((uint32_t*)st->codec->extradata)[i]);
335 memcpy(st->codec->palctrl->palette, st->codec->extradata,
336 FFMIN(st->codec->extradata_size, AVPALETTE_SIZE));
338 st->codec->palctrl->palette_changed = 1;
341 st->codec->codec_tag = tag1;
342 st->codec->codec_id = codec_get_id(codec_bmp_tags, tag1);
343 if(tag1 == MKTAG('D', 'V', 'R', ' '))
344 st->need_parsing = AVSTREAM_PARSE_FULL;
346 pos2 = url_ftell(pb);
347 url_fskip(pb, gsize - (pos2 - pos1 + 24));
348 } else if (!memcmp(&g, &comment_header, sizeof(GUID))) {
349 int len1, len2, len3, len4, len5;
356 get_str16_nolen(pb, len1, s->title , sizeof(s->title));
357 get_str16_nolen(pb, len2, s->author , sizeof(s->author));
358 get_str16_nolen(pb, len3, s->copyright, sizeof(s->copyright));
359 get_str16_nolen(pb, len4, s->comment , sizeof(s->comment));
361 } else if (!memcmp(&g, &stream_bitrate_guid, sizeof(GUID))) {
362 int stream_count = get_le16(pb);
365 // av_log(NULL, AV_LOG_ERROR, "stream bitrate properties\n");
366 // av_log(NULL, AV_LOG_ERROR, "streams %d\n", streams);
367 for(j = 0; j < stream_count; j++) {
368 int flags, bitrate, stream_id;
371 bitrate= get_le32(pb);
372 stream_id= (flags & 0x7f);
373 // av_log(NULL, AV_LOG_ERROR, "flags: 0x%x stream id %d, bitrate %d\n", flags, stream_id, bitrate);
374 asf->stream_bitrates[stream_id]= bitrate;
376 } else if (!memcmp(&g, &extended_content_header, sizeof(GUID))) {
379 desc_count = get_le16(pb);
380 for(i=0;i<desc_count;i++)
382 int name_len,value_type,value_len;
383 uint64_t value_num = 0;
386 name_len = get_le16(pb);
387 get_str16_nolen(pb, name_len, name, sizeof(name));
388 value_type = get_le16(pb);
389 value_len = get_le16(pb);
390 if ((value_type == 0) || (value_type == 1)) // unicode or byte
392 if (!strcmp(name,"WM/AlbumTitle")) get_str16_nolen(pb, value_len, s->album, sizeof(s->album));
393 else if(!strcmp(name,"WM/Genre" )) get_str16_nolen(pb, value_len, s->genre, sizeof(s->genre));
394 else if(!strcmp(name,"WM/Track") && s->track == 0) {
396 get_str16_nolen(pb, value_len, track, sizeof(track));
397 s->track = strtol(track, NULL, 10) + 1;
399 else if(!strcmp(name,"WM/TrackNumber")) {
401 get_str16_nolen(pb, value_len, track, sizeof(track));
402 s->track = strtol(track, NULL, 10);
404 else url_fskip(pb, value_len);
406 if ((value_type >= 2) && (value_type <= 5)) // boolean or DWORD or QWORD or WORD
408 value_num= get_value(pb, value_type);
409 if (!strcmp(name,"WM/Track" ) && s->track == 0) s->track = value_num + 1;
410 if (!strcmp(name,"WM/TrackNumber")) s->track = value_num;
413 } else if (!memcmp(&g, &metadata_header, sizeof(GUID))) {
414 int n, stream_num, name_len, value_len, value_type, value_num;
420 get_le16(pb); //lang_list_index
421 stream_num= get_le16(pb);
422 name_len= get_le16(pb);
423 value_type= get_le16(pb);
424 value_len= get_le32(pb);
426 get_str16_nolen(pb, name_len, name, sizeof(name));
427 //av_log(NULL, AV_LOG_ERROR, "%d %d %d %d %d <%s>\n", i, stream_num, name_len, value_type, value_len, name);
428 value_num= get_le16(pb);//we should use get_value() here but it does not work 2 is le16 here but le32 elsewhere
429 url_fskip(pb, value_len - 2);
432 if (!strcmp(name, "AspectRatioX")) dar[stream_num].num= value_num;
433 else if(!strcmp(name, "AspectRatioY")) dar[stream_num].den= value_num;
436 } else if (!memcmp(&g, &ext_stream_header, sizeof(GUID))) {
437 int ext_len, payload_ext_ct, stream_ct;
438 uint32_t ext_d, leak_rate, stream_num;
440 pos_ex_st = url_ftell(pb);
442 get_le64(pb); // starttime
443 get_le64(pb); // endtime
444 leak_rate = get_le32(pb); // leak-datarate
445 get_le32(pb); // bucket-datasize
446 get_le32(pb); // init-bucket-fullness
447 get_le32(pb); // alt-leak-datarate
448 get_le32(pb); // alt-bucket-datasize
449 get_le32(pb); // alt-init-bucket-fullness
450 get_le32(pb); // max-object-size
451 get_le32(pb); // flags (reliable,seekable,no_cleanpoints?,resend-live-cleanpoints, rest of bits reserved)
452 stream_num = get_le16(pb); // stream-num
453 get_le16(pb); // stream-language-id-index
454 get_le64(pb); // avg frametime in 100ns units
455 stream_ct = get_le16(pb); //stream-name-count
456 payload_ext_ct = get_le16(pb); //payload-extension-system-count
458 if (stream_num < 128)
459 bitrate[stream_num] = leak_rate;
461 for (i=0; i<stream_ct; i++){
463 ext_len = get_le16(pb);
464 url_fseek(pb, ext_len, SEEK_CUR);
467 for (i=0; i<payload_ext_ct; i++){
470 ext_len=get_le32(pb);
471 url_fseek(pb, ext_len, SEEK_CUR);
474 // there could be a optional stream properties object to follow
475 // if so the next iteration will pick it up
476 } else if (!memcmp(&g, &head1_guid, sizeof(GUID))) {
482 } else if (!memcmp(&g, &codec_comment_header, sizeof(GUID))) {
492 num = get_le16(pb); /* stream number */
493 get_str16(pb, str, sizeof(str));
494 get_str16(pb, str, sizeof(str));
499 if ((q - tag) < sizeof(tag) - 1)
506 } else if (url_feof(pb)) {
509 url_fseek(pb, gsize - 24, SEEK_CUR);
518 asf->data_offset = url_ftell(pb);
519 asf->packet_size_left = 0;
522 for(i=0; i<128; i++){
523 int stream_num= asf->asfid2avid[i];
525 AVCodecContext *codec= s->streams[stream_num]->codec;
526 if (!codec->bit_rate)
527 codec->bit_rate = bitrate[i];
528 if (dar[i].num > 0 && dar[i].den > 0)
529 av_reduce(&codec->sample_aspect_ratio.num,
530 &codec->sample_aspect_ratio.den,
531 dar[i].num, dar[i].den, INT_MAX);
532 //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);
539 for(i=0;i<s->nb_streams;i++) {
540 AVStream *st = s->streams[i];
542 av_free(st->priv_data);
543 av_free(st->codec->extradata);
550 #define DO_2BITS(bits, var, defval) \
553 case 3: var = get_le32(pb); rsize += 4; break; \
554 case 2: var = get_le16(pb); rsize += 2; break; \
555 case 1: var = get_byte(pb); rsize++; break; \
556 default: var = defval; break; \
561 * @return <0 in case of an error
563 static int asf_get_packet(AVFormatContext *s)
565 ASFContext *asf = s->priv_data;
566 ByteIOContext *pb = &s->pb;
567 uint32_t packet_length, padsize;
571 off= (url_ftell(&s->pb) - s->data_offset) % asf->packet_size + 3;
577 if(c == 0x82 && !d && !e)
583 av_log(s, AV_LOG_ERROR, "ff asf bad header %x at:%"PRId64"\n", c, url_ftell(pb));
585 if ((c & 0x8f) == 0x82) {
588 av_log(s, AV_LOG_ERROR, "ff asf bad non zero\n");
595 url_fseek(pb, -1, SEEK_CUR); //FIXME
598 asf->packet_flags = c;
599 asf->packet_property = d;
601 DO_2BITS(asf->packet_flags >> 5, packet_length, asf->packet_size);
602 DO_2BITS(asf->packet_flags >> 1, padsize, 0); // sequence ignored
603 DO_2BITS(asf->packet_flags >> 3, padsize, 0); // padding length
605 //the following checks prevent overflows and infinite loops
606 if(packet_length >= (1U<<29)){
607 av_log(s, AV_LOG_ERROR, "invalid packet_length %d at:%"PRId64"\n", packet_length, url_ftell(pb));
610 if(padsize >= packet_length){
611 av_log(s, AV_LOG_ERROR, "invalid padsize %d at:%"PRId64"\n", padsize, url_ftell(pb));
615 asf->packet_timestamp = get_le32(pb);
616 get_le16(pb); /* duration */
617 // rsize has at least 11 bytes which have to be present
619 if (asf->packet_flags & 0x01) {
620 asf->packet_segsizetype = get_byte(pb); rsize++;
621 asf->packet_segments = asf->packet_segsizetype & 0x3f;
623 asf->packet_segments = 1;
624 asf->packet_segsizetype = 0x80;
626 asf->packet_size_left = packet_length - padsize - rsize;
627 if (packet_length < asf->hdr.min_pktsize)
628 padsize += asf->hdr.min_pktsize - packet_length;
629 asf->packet_padsize = padsize;
631 printf("packet: size=%d padsize=%d left=%d\n", asf->packet_size, asf->packet_padsize, asf->packet_size_left);
638 * @return <0 if error
640 static int asf_read_frame_header(AVFormatContext *s){
641 ASFContext *asf = s->priv_data;
642 ByteIOContext *pb = &s->pb;
644 int num = get_byte(pb);
647 asf->packet_segments--;
648 asf->packet_key_frame = num >> 7;
649 asf->stream_index = asf->asfid2avid[num & 0x7f];
650 // sequence should be ignored!
651 DO_2BITS(asf->packet_property >> 4, asf->packet_seq, 0);
652 DO_2BITS(asf->packet_property >> 2, asf->packet_frag_offset, 0);
653 DO_2BITS(asf->packet_property, asf->packet_replic_size, 0);
654 //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);
655 if (asf->packet_replic_size >= 8) {
656 asf->packet_obj_size = get_le32(pb);
657 if(asf->packet_obj_size >= (1<<24) || asf->packet_obj_size <= 0){
658 av_log(s, AV_LOG_ERROR, "packet_obj_size invalid\n");
661 asf->packet_frag_timestamp = get_le32(pb); // timestamp
662 if(asf->packet_replic_size >= 8+38+4){
663 // for(i=0; i<asf->packet_replic_size-8; i++)
664 // av_log(s, AV_LOG_DEBUG, "%02X ",get_byte(pb));
665 // av_log(s, AV_LOG_DEBUG, "\n");
671 url_fskip(pb, asf->packet_replic_size - 8 - 38 - 4);
672 if(ts0!= -1) asf->packet_frag_timestamp= ts0/10000;
673 else asf->packet_frag_timestamp= AV_NOPTS_VALUE;
675 url_fskip(pb, asf->packet_replic_size - 8);
676 rsize += asf->packet_replic_size; // FIXME - check validity
677 } else if (asf->packet_replic_size==1){
678 // multipacket - frag_offset is begining timestamp
679 asf->packet_time_start = asf->packet_frag_offset;
680 asf->packet_frag_offset = 0;
681 asf->packet_frag_timestamp = asf->packet_timestamp;
683 asf->packet_time_delta = get_byte(pb);
685 }else if(asf->packet_replic_size!=0){
686 av_log(s, AV_LOG_ERROR, "unexpected packet_replic_size of %d\n", asf->packet_replic_size);
689 if (asf->packet_flags & 0x01) {
690 DO_2BITS(asf->packet_segsizetype >> 6, asf->packet_frag_size, 0); // 0 is illegal
691 if(asf->packet_frag_size > asf->packet_size_left - rsize){
692 av_log(s, AV_LOG_ERROR, "packet_frag_size is invalid\n");
695 //printf("Fragsize %d\n", asf->packet_frag_size);
697 asf->packet_frag_size = asf->packet_size_left - rsize;
698 //printf("Using rest %d %d %d\n", asf->packet_frag_size, asf->packet_size_left, rsize);
700 if (asf->packet_replic_size == 1) {
701 asf->packet_multi_size = asf->packet_frag_size;
702 if (asf->packet_multi_size > asf->packet_size_left)
705 asf->packet_size_left -= rsize;
706 //printf("___objsize____ %d %d rs:%d\n", asf->packet_obj_size, asf->packet_frag_offset, rsize);
711 static int asf_read_packet(AVFormatContext *s, AVPacket *pkt)
713 ASFContext *asf = s->priv_data;
714 ASFStream *asf_st = 0;
715 ByteIOContext *pb = &s->pb;
720 if (asf->packet_size_left < FRAME_HEADER_SIZE
721 || asf->packet_segments < 1) {
722 //asf->packet_size_left <= asf->packet_padsize) {
723 int ret = asf->packet_size_left + asf->packet_padsize;
724 //printf("PacketLeftSize:%d Pad:%d Pos:%"PRId64"\n", asf->packet_size_left, asf->packet_padsize, url_ftell(pb));
729 asf->packet_pos= url_ftell(&s->pb);
730 if (asf->data_object_size != (uint64_t)-1 &&
731 (asf->packet_pos - asf->data_object_offset >= asf->data_object_size))
732 return AVERROR(EIO); /* Do not exceed the size of the data object */
733 ret = asf_get_packet(s);
734 //printf("READ ASF PACKET %d r:%d c:%d\n", ret, asf->packet_size_left, pc++);
736 assert(asf->packet_size_left < FRAME_HEADER_SIZE || asf->packet_segments < 1);
737 asf->packet_time_start = 0;
740 if (asf->packet_time_start == 0) {
741 if(asf_read_frame_header(s) < 0){
742 asf->packet_segments= 0;
745 if (asf->stream_index < 0
746 || s->streams[asf->stream_index]->discard >= AVDISCARD_ALL
747 || (!asf->packet_key_frame && s->streams[asf->stream_index]->discard >= AVDISCARD_NONKEY)
749 asf->packet_time_start = 0;
750 /* unhandled packet (should not happen) */
751 url_fskip(pb, asf->packet_frag_size);
752 asf->packet_size_left -= asf->packet_frag_size;
753 if(asf->stream_index < 0)
754 av_log(s, AV_LOG_ERROR, "ff asf skip %d (unknown stream)\n", asf->packet_frag_size);
757 asf->asf_st = s->streams[asf->stream_index]->priv_data;
759 asf_st = asf->asf_st;
761 if (asf->packet_replic_size == 1) {
762 // frag_offset is here used as the begining timestamp
763 asf->packet_frag_timestamp = asf->packet_time_start;
764 asf->packet_time_start += asf->packet_time_delta;
765 asf->packet_obj_size = asf->packet_frag_size = get_byte(pb);
766 asf->packet_size_left--;
767 asf->packet_multi_size--;
768 if (asf->packet_multi_size < asf->packet_obj_size)
770 asf->packet_time_start = 0;
771 url_fskip(pb, asf->packet_multi_size);
772 asf->packet_size_left -= asf->packet_multi_size;
775 asf->packet_multi_size -= asf->packet_obj_size;
776 //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);
778 if( /*asf->packet_frag_size == asf->packet_obj_size*/
779 asf_st->frag_offset + asf->packet_frag_size <= asf_st->pkt.size
780 && asf_st->frag_offset + asf->packet_frag_size > asf->packet_obj_size){
781 av_log(s, AV_LOG_INFO, "ignoring invalid packet_obj_size (%d %d %d %d)\n",
782 asf_st->frag_offset, asf->packet_frag_size,
783 asf->packet_obj_size, asf_st->pkt.size);
784 asf->packet_obj_size= asf_st->pkt.size;
787 if ( asf_st->pkt.size != asf->packet_obj_size
788 || asf_st->frag_offset + asf->packet_frag_size > asf_st->pkt.size) { //FIXME is this condition sufficient?
789 if(asf_st->pkt.data){
790 av_log(s, AV_LOG_INFO, "freeing incomplete packet size %d, new %d\n", asf_st->pkt.size, asf->packet_obj_size);
791 asf_st->frag_offset = 0;
792 av_free_packet(&asf_st->pkt);
795 av_new_packet(&asf_st->pkt, asf->packet_obj_size);
796 asf_st->seq = asf->packet_seq;
797 asf_st->pkt.pts = asf->packet_frag_timestamp;
798 asf_st->pkt.stream_index = asf->stream_index;
800 asf_st->packet_pos= asf->packet_pos;
801 //printf("new packet: stream:%d key:%d packet_key:%d audio:%d size:%d\n",
802 //asf->stream_index, asf->packet_key_frame, asf_st->pkt.flags & PKT_FLAG_KEY,
803 //s->streams[asf->stream_index]->codec->codec_type == CODEC_TYPE_AUDIO, asf->packet_obj_size);
804 if (s->streams[asf->stream_index]->codec->codec_type == CODEC_TYPE_AUDIO)
805 asf->packet_key_frame = 1;
806 if (asf->packet_key_frame)
807 asf_st->pkt.flags |= PKT_FLAG_KEY;
811 //printf("READ PACKET s:%d os:%d o:%d,%d l:%d DATA:%p\n",
812 // asf->packet_size, asf_st->pkt.size, asf->packet_frag_offset,
813 // asf_st->frag_offset, asf->packet_frag_size, asf_st->pkt.data);
814 asf->packet_size_left -= asf->packet_frag_size;
815 if (asf->packet_size_left < 0)
818 if( asf->packet_frag_offset >= asf_st->pkt.size
819 || asf->packet_frag_size > asf_st->pkt.size - asf->packet_frag_offset){
820 av_log(s, AV_LOG_ERROR, "packet fragment position invalid %u,%u not in %u\n",
821 asf->packet_frag_offset, asf->packet_frag_size, asf_st->pkt.size);
825 get_buffer(pb, asf_st->pkt.data + asf->packet_frag_offset,
826 asf->packet_frag_size);
827 if (s->key && s->keylen == 20)
828 ff_asfcrypt_dec(s->key, asf_st->pkt.data + asf->packet_frag_offset,
829 asf->packet_frag_size);
830 asf_st->frag_offset += asf->packet_frag_size;
831 /* test if whole packet is read */
832 if (asf_st->frag_offset == asf_st->pkt.size) {
833 //workaround for macroshit radio DVR-MS files
834 if( s->streams[asf->stream_index]->codec->codec_id == CODEC_ID_MPEG2VIDEO
835 && asf_st->pkt.size > 100){
837 for(i=0; i<asf_st->pkt.size && !asf_st->pkt.data[i]; i++);
838 if(i == asf_st->pkt.size){
839 av_log(s, AV_LOG_DEBUG, "discarding ms fart\n");
840 asf_st->frag_offset = 0;
841 av_free_packet(&asf_st->pkt);
847 if (asf_st->ds_span > 1) {
848 if(asf_st->pkt.size != asf_st->ds_packet_size * asf_st->ds_span){
849 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);
851 /* packet descrambling */
852 uint8_t *newdata = av_malloc(asf_st->pkt.size);
855 while (offset < asf_st->pkt.size) {
856 int off = offset / asf_st->ds_chunk_size;
857 int row = off / asf_st->ds_span;
858 int col = off % asf_st->ds_span;
859 int idx = row + col * asf_st->ds_packet_size / asf_st->ds_chunk_size;
860 //printf("off:%d row:%d col:%d idx:%d\n", off, row, col, idx);
862 assert(offset + asf_st->ds_chunk_size <= asf_st->pkt.size);
863 assert(idx+1 <= asf_st->pkt.size / asf_st->ds_chunk_size);
864 memcpy(newdata + offset,
865 asf_st->pkt.data + idx * asf_st->ds_chunk_size,
866 asf_st->ds_chunk_size);
867 offset += asf_st->ds_chunk_size;
869 av_free(asf_st->pkt.data);
870 asf_st->pkt.data = newdata;
874 asf_st->frag_offset = 0;
876 //printf("packet %d %d\n", asf_st->pkt.size, asf->packet_frag_size);
877 asf_st->pkt.size = 0;
878 asf_st->pkt.data = 0;
879 break; // packet completed
885 // Added to support seeking after packets have been read
886 // If information is not reset, read_packet fails due to
887 // leftover information from previous reads
888 static void asf_reset_header(AVFormatContext *s)
890 ASFContext *asf = s->priv_data;
894 asf->packet_nb_frames = 0;
895 asf->packet_size_left = 0;
896 asf->packet_segments = 0;
897 asf->packet_flags = 0;
898 asf->packet_property = 0;
899 asf->packet_timestamp = 0;
900 asf->packet_segsizetype = 0;
901 asf->packet_segments = 0;
903 asf->packet_replic_size = 0;
904 asf->packet_key_frame = 0;
905 asf->packet_padsize = 0;
906 asf->packet_frag_offset = 0;
907 asf->packet_frag_size = 0;
908 asf->packet_frag_timestamp = 0;
909 asf->packet_multi_size = 0;
910 asf->packet_obj_size = 0;
911 asf->packet_time_delta = 0;
912 asf->packet_time_start = 0;
914 for(i=0; i<s->nb_streams; i++){
915 asf_st= s->streams[i]->priv_data;
916 av_free_packet(&asf_st->pkt);
917 asf_st->frag_offset=0;
923 static int asf_read_close(AVFormatContext *s)
928 for(i=0;i<s->nb_streams;i++) {
929 AVStream *st = s->streams[i];
930 av_free(st->priv_data);
931 av_free(st->codec->palctrl);
936 static int64_t asf_read_pts(AVFormatContext *s, int stream_index, int64_t *ppos, int64_t pos_limit)
938 ASFContext *asf = s->priv_data;
939 AVPacket pkt1, *pkt = &pkt1;
944 int64_t start_pos[s->nb_streams];
946 for(i=0; i<s->nb_streams; i++){
950 pos= (pos+asf->packet_size-1-s->data_offset)/asf->packet_size*asf->packet_size+ s->data_offset;
952 url_fseek(&s->pb, pos, SEEK_SET);
954 //printf("asf_read_pts\n");
957 if (av_read_frame(s, pkt) < 0){
958 av_log(s, AV_LOG_INFO, "asf_read_pts failed\n");
959 return AV_NOPTS_VALUE;
965 if(pkt->flags&PKT_FLAG_KEY){
966 i= pkt->stream_index;
968 asf_st= s->streams[i]->priv_data;
970 // assert((asf_st->packet_pos - s->data_offset) % asf->packet_size == 0);
971 pos= asf_st->packet_pos;
973 av_add_index_entry(s->streams[i], pos, pts, pkt->size, pos - start_pos[i] + 1, AVINDEX_KEYFRAME);
974 start_pos[i]= asf_st->packet_pos + 1;
976 if(pkt->stream_index == stream_index)
982 //printf("found keyframe at %"PRId64" stream %d stamp:%"PRId64"\n", *ppos, stream_index, pts);
987 static void asf_build_simple_index(AVFormatContext *s, int stream_index)
990 ASFContext *asf = s->priv_data;
991 int64_t gsize, itime;
992 int64_t pos, current_pos, index_pts;
996 current_pos = url_ftell(&s->pb);
998 url_fseek(&s->pb, asf->data_object_offset + asf->data_object_size, SEEK_SET);
999 get_guid(&s->pb, &g);
1000 if (!memcmp(&g, &index_guid, sizeof(GUID))) {
1001 gsize = get_le64(&s->pb);
1002 get_guid(&s->pb, &g);
1003 itime=get_le64(&s->pb);
1004 pct=get_le32(&s->pb);
1005 ict=get_le32(&s->pb);
1006 av_log(NULL, AV_LOG_DEBUG, "itime:0x%"PRIx64", pct:%d, ict:%d\n",itime,pct,ict);
1008 for (i=0;i<ict;i++){
1009 int pktnum=get_le32(&s->pb);
1010 int pktct =get_le16(&s->pb);
1011 av_log(NULL, AV_LOG_DEBUG, "pktnum:%d, pktct:%d\n", pktnum, pktct);
1013 pos=s->data_offset + asf->packet_size*(int64_t)pktnum;
1014 index_pts=av_rescale(itime, i, 10000);
1016 av_add_index_entry(s->streams[stream_index], pos, index_pts, asf->packet_size, 0, AVINDEX_KEYFRAME);
1020 url_fseek(&s->pb, current_pos, SEEK_SET);
1023 static int asf_read_seek(AVFormatContext *s, int stream_index, int64_t pts, int flags)
1025 ASFContext *asf = s->priv_data;
1026 AVStream *st = s->streams[stream_index];
1030 if (asf->packet_size <= 0)
1033 if (!asf->index_read)
1034 asf_build_simple_index(s, stream_index);
1036 if(!(asf->index_read && st->index_entries)){
1037 if(av_seek_frame_binary(s, stream_index, pts, flags)<0)
1040 index= av_index_search_timestamp(st, pts, flags);
1044 /* find the position */
1045 pos = st->index_entries[index].pos;
1046 pts = st->index_entries[index].timestamp;
1048 // various attempts to find key frame have failed so far
1049 // asf_reset_header(s);
1050 // url_fseek(&s->pb, pos, SEEK_SET);
1052 // for(i=0;i<16;i++){
1053 // pos = url_ftell(&s->pb);
1054 // if (av_read_frame(s, &pkt) < 0){
1055 // av_log(s, AV_LOG_INFO, "seek failed\n");
1058 // asf_st = s->streams[stream_index]->priv_data;
1059 // pos += st->parser->frame_offset;
1061 // if (pkt.size > b) {
1066 // av_free_packet(&pkt);
1070 av_log(NULL, AV_LOG_DEBUG, "SEEKTO: %"PRId64"\n", pos);
1071 url_fseek(&s->pb, pos, SEEK_SET);
1073 asf_reset_header(s);
1077 AVInputFormat asf_demuxer = {