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 /**********************************/
43 #define PRINT_IF_GUID(g,cmp) \
44 if (!memcmp(g, &cmp, sizeof(GUID))) \
45 printf("(GUID: %s) ", #cmp)
47 static void print_guid(const GUID *g)
50 PRINT_IF_GUID(g, asf_header);
51 else PRINT_IF_GUID(g, file_header);
52 else PRINT_IF_GUID(g, stream_header);
53 else PRINT_IF_GUID(g, audio_stream);
54 else PRINT_IF_GUID(g, audio_conceal_none);
55 else PRINT_IF_GUID(g, video_stream);
56 else PRINT_IF_GUID(g, video_conceal_none);
57 else PRINT_IF_GUID(g, command_stream);
58 else PRINT_IF_GUID(g, comment_header);
59 else PRINT_IF_GUID(g, codec_comment_header);
60 else PRINT_IF_GUID(g, codec_comment1_header);
61 else PRINT_IF_GUID(g, data_header);
62 else PRINT_IF_GUID(g, index_guid);
63 else PRINT_IF_GUID(g, head1_guid);
64 else PRINT_IF_GUID(g, head2_guid);
65 else PRINT_IF_GUID(g, my_guid);
66 else PRINT_IF_GUID(g, ext_stream_header);
67 else PRINT_IF_GUID(g, extended_content_header);
68 else PRINT_IF_GUID(g, ext_stream_embed_stream_header);
69 else PRINT_IF_GUID(g, ext_stream_audio_stream);
70 else PRINT_IF_GUID(g, metadata_header);
72 printf("(GUID: unknown) ");
74 printf(" 0x%02x,", (*g)[i]);
80 static void get_guid(ByteIOContext *s, GUID *g)
82 assert(sizeof(*g) == 16);
83 get_buffer(s, g, sizeof(*g));
87 static void get_str16(ByteIOContext *pb, char *buf, int buf_size)
96 if ((q - buf) < buf_size - 1)
104 static void get_str16_nolen(ByteIOContext *pb, int len, char *buf, int buf_size)
110 PUT_UTF8(get_le16(pb), tmp, if (q - buf < buf_size - 1) *q++ = tmp;)
115 static int asf_probe(AVProbeData *pd)
117 /* check file header */
118 if (pd->buf_size <= 32)
121 if (!memcmp(pd->buf, &asf_header, sizeof(GUID)))
122 return AVPROBE_SCORE_MAX;
127 static int get_value(ByteIOContext *pb, int type){
129 case 2: return get_le32(pb);
130 case 3: return get_le32(pb);
131 case 4: return get_le64(pb);
132 case 5: return get_le16(pb);
133 default:return INT_MIN;
137 static int asf_read_header(AVFormatContext *s, AVFormatParameters *ap)
139 ASFContext *asf = s->priv_data;
141 ByteIOContext *pb = &s->pb;
148 memset(dar, 0, sizeof(dar));
151 if (memcmp(&g, &asf_header, sizeof(GUID)))
157 memset(&asf->asfid2avid, -1, sizeof(asf->asfid2avid));
160 gsize = get_le64(pb);
162 printf("%08"PRIx64": ", url_ftell(pb) - 24);
164 printf(" size=0x%"PRIx64"\n", gsize);
168 if (!memcmp(&g, &file_header, sizeof(GUID))) {
169 get_guid(pb, &asf->hdr.guid);
170 asf->hdr.file_size = get_le64(pb);
171 asf->hdr.create_time = get_le64(pb);
172 asf->nb_packets = get_le64(pb);
173 asf->hdr.send_time = get_le64(pb);
174 asf->hdr.play_time = get_le64(pb);
175 asf->hdr.preroll = get_le32(pb);
176 asf->hdr.ignore = get_le32(pb);
177 asf->hdr.flags = get_le32(pb);
178 asf->hdr.min_pktsize = get_le32(pb);
179 asf->hdr.max_pktsize = get_le32(pb);
180 asf->hdr.max_bitrate = get_le32(pb);
181 asf->packet_size = asf->hdr.max_pktsize;
182 } else if (!memcmp(&g, &stream_header, sizeof(GUID))) {
183 int type, type_specific_size, sizeX;
187 int test_for_ext_stream_audio;
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 if(!(asf->hdr.flags & 0x01)) { // if we aren't streaming...
201 st->duration = asf->hdr.send_time /
202 (10000000 / 1000) - st->start_time;
206 test_for_ext_stream_audio = 0;
207 if (!memcmp(&g, &audio_stream, sizeof(GUID))) {
208 type = CODEC_TYPE_AUDIO;
209 } else if (!memcmp(&g, &video_stream, sizeof(GUID))) {
210 type = CODEC_TYPE_VIDEO;
211 } else if (!memcmp(&g, &command_stream, sizeof(GUID))) {
212 type = CODEC_TYPE_UNKNOWN;
213 } else if (!memcmp(&g, &ext_stream_embed_stream_header, sizeof(GUID))) {
214 test_for_ext_stream_audio = 1;
215 type = CODEC_TYPE_UNKNOWN;
220 total_size = get_le64(pb);
221 type_specific_size = get_le32(pb);
223 st->id = get_le16(pb) & 0x7f; /* stream id */
224 // mapping of asf ID to AV stream ID;
225 asf->asfid2avid[st->id] = s->nb_streams - 1;
229 if (test_for_ext_stream_audio) {
231 if (!memcmp(&g, &ext_stream_audio_stream, sizeof(GUID))) {
232 type = CODEC_TYPE_AUDIO;
242 st->codec->codec_type = type;
243 if (type == CODEC_TYPE_AUDIO) {
244 get_wav_header(pb, st->codec, type_specific_size);
245 st->need_parsing = 1;
246 /* We have to init the frame size at some point .... */
247 pos2 = url_ftell(pb);
248 if (gsize > (pos2 + 8 - pos1 + 24)) {
249 asf_st->ds_span = get_byte(pb);
250 asf_st->ds_packet_size = get_le16(pb);
251 asf_st->ds_chunk_size = get_le16(pb);
252 get_le16(pb); //ds_data_size
253 get_byte(pb); //ds_silence_data
255 //printf("Descrambling: ps:%d cs:%d ds:%d s:%d sd:%d\n",
256 // asf_st->ds_packet_size, asf_st->ds_chunk_size,
257 // asf_st->ds_data_size, asf_st->ds_span, asf_st->ds_silence_data);
258 if (asf_st->ds_span > 1) {
259 if (!asf_st->ds_chunk_size
260 || (asf_st->ds_packet_size/asf_st->ds_chunk_size <= 1)
261 || asf_st->ds_packet_size % asf_st->ds_chunk_size)
262 asf_st->ds_span = 0; // disable descrambling
264 switch (st->codec->codec_id) {
266 st->codec->frame_size = MPA_FRAME_SIZE;
268 case CODEC_ID_PCM_S16LE:
269 case CODEC_ID_PCM_S16BE:
270 case CODEC_ID_PCM_U16LE:
271 case CODEC_ID_PCM_U16BE:
272 case CODEC_ID_PCM_S8:
273 case CODEC_ID_PCM_U8:
274 case CODEC_ID_PCM_ALAW:
275 case CODEC_ID_PCM_MULAW:
276 st->codec->frame_size = 1;
279 /* This is probably wrong, but it prevents a crash later */
280 st->codec->frame_size = 1;
283 } else if (type == CODEC_TYPE_VIDEO) {
287 size = get_le16(pb); /* size */
288 sizeX= get_le32(pb); /* size */
289 st->codec->width = get_le32(pb);
290 st->codec->height = get_le32(pb);
291 /* not available for asf */
292 get_le16(pb); /* panes */
293 st->codec->bits_per_sample = get_le16(pb); /* depth */
296 // av_log(NULL, AV_LOG_DEBUG, "size:%d tsize:%d sizeX:%d\n", size, total_size, sizeX);
299 st->codec->extradata_size = size - 40;
300 st->codec->extradata = av_mallocz(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
301 get_buffer(pb, st->codec->extradata, st->codec->extradata_size);
304 /* Extract palette from extradata if bpp <= 8 */
305 /* This code assumes that extradata contains only palette */
306 /* This is true for all paletted codecs implemented in ffmpeg */
307 if (st->codec->extradata_size && (st->codec->bits_per_sample <= 8)) {
308 st->codec->palctrl = av_mallocz(sizeof(AVPaletteControl));
309 #ifdef WORDS_BIGENDIAN
310 for (i = 0; i < FFMIN(st->codec->extradata_size, AVPALETTE_SIZE)/4; i++)
311 st->codec->palctrl->palette[i] = bswap_32(((uint32_t*)st->codec->extradata)[i]);
313 memcpy(st->codec->palctrl->palette, st->codec->extradata,
314 FFMIN(st->codec->extradata_size, AVPALETTE_SIZE));
316 st->codec->palctrl->palette_changed = 1;
319 st->codec->codec_tag = tag1;
320 st->codec->codec_id = codec_get_id(codec_bmp_tags, tag1);
321 if(tag1 == MKTAG('D', 'V', 'R', ' '))
322 st->need_parsing = 1;
324 pos2 = url_ftell(pb);
325 url_fskip(pb, gsize - (pos2 - pos1 + 24));
326 } else if (!memcmp(&g, &data_header, sizeof(GUID))) {
327 asf->data_object_offset = url_ftell(pb);
328 // if not streaming, gsize is not unlimited (how?), and there is enough space in the file..
329 if (!(asf->hdr.flags & 0x01) && gsize != (uint64_t)-1 && gsize >= 24) {
330 asf->data_object_size = gsize - 24;
332 asf->data_object_size = (uint64_t)-1;
335 } else if (!memcmp(&g, &comment_header, sizeof(GUID))) {
336 int len1, len2, len3, len4, len5;
343 get_str16_nolen(pb, len1, s->title , sizeof(s->title));
344 get_str16_nolen(pb, len2, s->author , sizeof(s->author));
345 get_str16_nolen(pb, len3, s->copyright, sizeof(s->copyright));
346 get_str16_nolen(pb, len4, s->comment , sizeof(s->comment));
348 } else if (!memcmp(&g, &extended_content_header, sizeof(GUID))) {
351 desc_count = get_le16(pb);
352 for(i=0;i<desc_count;i++)
354 int name_len,value_type,value_len;
355 uint64_t value_num = 0;
358 name_len = get_le16(pb);
359 get_str16_nolen(pb, name_len, name, sizeof(name));
360 value_type = get_le16(pb);
361 value_len = get_le16(pb);
362 if ((value_type == 0) || (value_type == 1)) // unicode or byte
364 if (!strcmp(name,"WM/AlbumTitle")) get_str16_nolen(pb, value_len, s->album, sizeof(s->album));
365 else if(!strcmp(name,"WM/Genre" )) get_str16_nolen(pb, value_len, s->genre, sizeof(s->genre));
366 else url_fskip(pb, value_len);
368 if ((value_type >= 2) && (value_type <= 5)) // boolean or DWORD or QWORD or WORD
370 value_num= get_value(pb, value_type);
371 if (!strcmp(name,"WM/Track" )) s->track = value_num + 1;
372 if (!strcmp(name,"WM/TrackNumber")) s->track = value_num;
375 } else if (!memcmp(&g, &metadata_header, sizeof(GUID))) {
376 int n, stream_num, name_len, value_len, value_type, value_num;
382 get_le16(pb); //lang_list_index
383 stream_num= get_le16(pb);
384 name_len= get_le16(pb);
385 value_type= get_le16(pb);
386 value_len= get_le32(pb);
388 get_str16_nolen(pb, name_len, name, sizeof(name));
389 //av_log(NULL, AV_LOG_ERROR, "%d %d %d %d %d <%s>\n", i, stream_num, name_len, value_type, value_len, name);
390 value_num= get_le16(pb);//we should use get_value() here but it doesnt work 2 is le16 here but le32 elsewhere
391 url_fskip(pb, value_len - 2);
394 if (!strcmp(name, "AspectRatioX")) dar[stream_num].num= value_num;
395 else if(!strcmp(name, "AspectRatioY")) dar[stream_num].den= value_num;
398 } else if (!memcmp(&g, &ext_stream_header, sizeof(GUID))) {
399 int ext_len, payload_ext_ct, stream_ct;
402 pos_ex_st = url_ftell(pb);
404 get_le64(pb); // starttime
405 get_le64(pb); // endtime
406 get_le32(pb); // leak-datarate
407 get_le32(pb); // bucket-datasize
408 get_le32(pb); // init-bucket-fullness
409 get_le32(pb); // alt-leak-datarate
410 get_le32(pb); // alt-bucket-datasize
411 get_le32(pb); // alt-init-bucket-fullness
412 get_le32(pb); // max-object-size
413 get_le32(pb); // flags (reliable,seekable,no_cleanpoints?,resend-live-cleanpoints, rest of bits reserved)
414 get_le16(pb); // stream-num
415 get_le16(pb); // stream-language-id-index
416 get_le64(pb); // avg frametime in 100ns units
417 stream_ct = get_le16(pb); //stream-name-count
418 payload_ext_ct = get_le16(pb); //payload-extension-system-count
420 for (i=0; i<stream_ct; i++){
422 ext_len = get_le16(pb);
423 url_fseek(pb, ext_len, SEEK_CUR);
426 for (i=0; i<payload_ext_ct; i++){
429 ext_len=get_le32(pb);
430 url_fseek(pb, ext_len, SEEK_CUR);
433 // there could be a optional stream properties object to follow
434 // if so the next iteration will pick it up
435 } else if (!memcmp(&g, &head1_guid, sizeof(GUID))) {
441 } else if (!memcmp(&g, &codec_comment_header, sizeof(GUID))) {
451 num = get_le16(pb); /* stream number */
452 get_str16(pb, str, sizeof(str));
453 get_str16(pb, str, sizeof(str));
458 if ((q - tag) < sizeof(tag) - 1)
465 } else if (url_feof(pb)) {
468 url_fseek(pb, gsize - 24, SEEK_CUR);
477 asf->data_offset = url_ftell(pb);
478 asf->packet_size_left = 0;
481 for(i=0; i<128; i++){
482 int stream_num= asf->asfid2avid[i];
483 if(stream_num>=0 && dar[i].num>0 && dar[i].den>0){
484 AVCodecContext *codec= s->streams[stream_num]->codec;
485 av_reduce(&codec->sample_aspect_ratio.num,
486 &codec->sample_aspect_ratio.den,
487 dar[i].num, dar[i].den, INT_MAX);
488 //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);
495 for(i=0;i<s->nb_streams;i++) {
496 AVStream *st = s->streams[i];
498 av_free(st->priv_data);
499 av_free(st->codec->extradata);
506 #define DO_2BITS(bits, var, defval) \
509 case 3: var = get_le32(pb); rsize += 4; break; \
510 case 2: var = get_le16(pb); rsize += 2; break; \
511 case 1: var = get_byte(pb); rsize++; break; \
512 default: var = defval; break; \
517 * @return <0 in case of an error
519 static int asf_get_packet(AVFormatContext *s)
521 ASFContext *asf = s->priv_data;
522 ByteIOContext *pb = &s->pb;
523 uint32_t packet_length, padsize;
527 off= (url_ftell(&s->pb) - s->data_offset) % asf->packet_size + 3;
533 if(c == 0x82 && !d && !e)
539 av_log(s, AV_LOG_ERROR, "ff asf bad header %x at:%"PRId64"\n", c, url_ftell(pb));
541 if ((c & 0x0f) == 2) { // always true for now
544 av_log(s, AV_LOG_ERROR, "ff asf bad non zero\n");
552 printf("ff asf bad header %x at:%"PRId64"\n", c, url_ftell(pb));
556 asf->packet_flags = d;
557 asf->packet_property = e;
559 DO_2BITS(asf->packet_flags >> 5, packet_length, asf->packet_size);
560 DO_2BITS(asf->packet_flags >> 1, padsize, 0); // sequence ignored
561 DO_2BITS(asf->packet_flags >> 3, padsize, 0); // padding length
563 //the following checks prevent overflows and infinite loops
564 if(packet_length >= (1U<<29)){
565 av_log(s, AV_LOG_ERROR, "invalid packet_length %d at:%"PRId64"\n", packet_length, url_ftell(pb));
568 if(padsize >= packet_length){
569 av_log(s, AV_LOG_ERROR, "invalid padsize %d at:%"PRId64"\n", padsize, url_ftell(pb));
573 asf->packet_timestamp = get_le32(pb);
574 get_le16(pb); /* duration */
575 // rsize has at least 11 bytes which have to be present
577 if (asf->packet_flags & 0x01) {
578 asf->packet_segsizetype = get_byte(pb); rsize++;
579 asf->packet_segments = asf->packet_segsizetype & 0x3f;
581 asf->packet_segments = 1;
582 asf->packet_segsizetype = 0x80;
584 asf->packet_size_left = packet_length - padsize - rsize;
585 if (packet_length < asf->hdr.min_pktsize)
586 padsize += asf->hdr.min_pktsize - packet_length;
587 asf->packet_padsize = padsize;
589 printf("packet: size=%d padsize=%d left=%d\n", asf->packet_size, asf->packet_padsize, asf->packet_size_left);
596 * @return <0 if error
598 static int asf_read_frame_header(AVFormatContext *s){
599 ASFContext *asf = s->priv_data;
600 ByteIOContext *pb = &s->pb;
602 int num = get_byte(pb);
605 asf->packet_segments--;
606 asf->packet_key_frame = num >> 7;
607 asf->stream_index = asf->asfid2avid[num & 0x7f];
608 // sequence should be ignored!
609 DO_2BITS(asf->packet_property >> 4, asf->packet_seq, 0);
610 DO_2BITS(asf->packet_property >> 2, asf->packet_frag_offset, 0);
611 DO_2BITS(asf->packet_property, asf->packet_replic_size, 0);
612 //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);
613 if (asf->packet_replic_size >= 8) {
614 asf->packet_obj_size = get_le32(pb);
615 if(asf->packet_obj_size >= (1<<24) || asf->packet_obj_size <= 0){
616 av_log(s, AV_LOG_ERROR, "packet_obj_size invalid\n");
619 asf->packet_frag_timestamp = get_le32(pb); // timestamp
620 if(asf->packet_replic_size >= 8+38+4){
621 // for(i=0; i<asf->packet_replic_size-8; i++)
622 // av_log(s, AV_LOG_DEBUG, "%02X ",get_byte(pb));
623 // av_log(s, AV_LOG_DEBUG, "\n");
629 url_fskip(pb, asf->packet_replic_size - 8 - 38 - 4);
630 if(ts0!= -1) asf->packet_frag_timestamp= ts0/10000;
631 else asf->packet_frag_timestamp= AV_NOPTS_VALUE;
633 url_fskip(pb, asf->packet_replic_size - 8);
634 rsize += asf->packet_replic_size; // FIXME - check validity
635 } else if (asf->packet_replic_size==1){
636 // multipacket - frag_offset is begining timestamp
637 asf->packet_time_start = asf->packet_frag_offset;
638 asf->packet_frag_offset = 0;
639 asf->packet_frag_timestamp = asf->packet_timestamp;
641 asf->packet_time_delta = get_byte(pb);
643 }else if(asf->packet_replic_size!=0){
644 av_log(s, AV_LOG_ERROR, "unexpected packet_replic_size of %d\n", asf->packet_replic_size);
647 if (asf->packet_flags & 0x01) {
648 DO_2BITS(asf->packet_segsizetype >> 6, asf->packet_frag_size, 0); // 0 is illegal
649 if(asf->packet_frag_size > asf->packet_size_left - rsize){
650 av_log(s, AV_LOG_ERROR, "packet_frag_size is invalid\n");
653 //printf("Fragsize %d\n", asf->packet_frag_size);
655 asf->packet_frag_size = asf->packet_size_left - rsize;
656 //printf("Using rest %d %d %d\n", asf->packet_frag_size, asf->packet_size_left, rsize);
658 if (asf->packet_replic_size == 1) {
659 asf->packet_multi_size = asf->packet_frag_size;
660 if (asf->packet_multi_size > asf->packet_size_left)
663 asf->packet_size_left -= rsize;
664 //printf("___objsize____ %d %d rs:%d\n", asf->packet_obj_size, asf->packet_frag_offset, rsize);
669 static int asf_read_packet(AVFormatContext *s, AVPacket *pkt)
671 ASFContext *asf = s->priv_data;
672 ASFStream *asf_st = 0;
673 ByteIOContext *pb = &s->pb;
678 if (asf->packet_size_left < FRAME_HEADER_SIZE
679 || asf->packet_segments < 1) {
680 //asf->packet_size_left <= asf->packet_padsize) {
681 int ret = asf->packet_size_left + asf->packet_padsize;
682 //printf("PacketLeftSize:%d Pad:%d Pos:%"PRId64"\n", asf->packet_size_left, asf->packet_padsize, url_ftell(pb));
687 asf->packet_pos= url_ftell(&s->pb);
688 if (asf->data_object_size != (uint64_t)-1 &&
689 (asf->packet_pos - asf->data_object_offset >= asf->data_object_size))
690 return AVERROR_IO; /* Do not exceed the size of the data object */
691 ret = asf_get_packet(s);
692 //printf("READ ASF PACKET %d r:%d c:%d\n", ret, asf->packet_size_left, pc++);
694 assert(asf->packet_size_left < FRAME_HEADER_SIZE || asf->packet_segments < 1);
695 asf->packet_time_start = 0;
698 if (asf->packet_time_start == 0) {
699 if(asf_read_frame_header(s) < 0){
700 asf->packet_segments= 0;
703 if (asf->stream_index < 0
704 || s->streams[asf->stream_index]->discard >= AVDISCARD_ALL
705 || (!asf->packet_key_frame && s->streams[asf->stream_index]->discard >= AVDISCARD_NONKEY)
707 asf->packet_time_start = 0;
708 /* unhandled packet (should not happen) */
709 url_fskip(pb, asf->packet_frag_size);
710 asf->packet_size_left -= asf->packet_frag_size;
711 if(asf->stream_index < 0)
712 av_log(s, AV_LOG_ERROR, "ff asf skip %d (unknown stream)\n", asf->packet_frag_size);
715 asf->asf_st = s->streams[asf->stream_index]->priv_data;
717 asf_st = asf->asf_st;
719 if (asf->packet_replic_size == 1) {
720 // frag_offset is here used as the begining timestamp
721 asf->packet_frag_timestamp = asf->packet_time_start;
722 asf->packet_time_start += asf->packet_time_delta;
723 asf->packet_obj_size = asf->packet_frag_size = get_byte(pb);
724 asf->packet_size_left--;
725 asf->packet_multi_size--;
726 if (asf->packet_multi_size < asf->packet_obj_size)
728 asf->packet_time_start = 0;
729 url_fskip(pb, asf->packet_multi_size);
730 asf->packet_size_left -= asf->packet_multi_size;
733 asf->packet_multi_size -= asf->packet_obj_size;
734 //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);
736 if ( asf_st->pkt.size != asf->packet_obj_size
737 || asf_st->frag_offset + asf->packet_frag_size > asf_st->pkt.size) { //FIXME is this condition sufficient?
738 if(asf_st->pkt.data){
739 av_log(s, AV_LOG_INFO, "freeing incomplete packet size %d, new %d\n", asf_st->pkt.size, asf->packet_obj_size);
740 asf_st->frag_offset = 0;
741 av_free_packet(&asf_st->pkt);
744 av_new_packet(&asf_st->pkt, asf->packet_obj_size);
745 asf_st->seq = asf->packet_seq;
746 asf_st->pkt.pts = asf->packet_frag_timestamp;
747 asf_st->pkt.stream_index = asf->stream_index;
749 asf_st->packet_pos= asf->packet_pos;
750 //printf("new packet: stream:%d key:%d packet_key:%d audio:%d size:%d\n",
751 //asf->stream_index, asf->packet_key_frame, asf_st->pkt.flags & PKT_FLAG_KEY,
752 //s->streams[asf->stream_index]->codec->codec_type == CODEC_TYPE_AUDIO, asf->packet_obj_size);
753 if (s->streams[asf->stream_index]->codec->codec_type == CODEC_TYPE_AUDIO)
754 asf->packet_key_frame = 1;
755 if (asf->packet_key_frame)
756 asf_st->pkt.flags |= PKT_FLAG_KEY;
760 //printf("READ PACKET s:%d os:%d o:%d,%d l:%d DATA:%p\n",
761 // asf->packet_size, asf_st->pkt.size, asf->packet_frag_offset,
762 // asf_st->frag_offset, asf->packet_frag_size, asf_st->pkt.data);
763 asf->packet_size_left -= asf->packet_frag_size;
764 if (asf->packet_size_left < 0)
767 if( asf->packet_frag_offset >= asf_st->pkt.size
768 || asf->packet_frag_size > asf_st->pkt.size - asf->packet_frag_offset){
769 av_log(s, AV_LOG_ERROR, "packet fragment position invalid %u,%u not in %u\n",
770 asf->packet_frag_offset, asf->packet_frag_size, asf_st->pkt.size);
774 get_buffer(pb, asf_st->pkt.data + asf->packet_frag_offset,
775 asf->packet_frag_size);
776 asf_st->frag_offset += asf->packet_frag_size;
777 /* test if whole packet is read */
778 if (asf_st->frag_offset == asf_st->pkt.size) {
780 if (asf_st->ds_span > 1) {
781 if(asf_st->pkt.size != asf_st->ds_packet_size * asf_st->ds_span){
782 av_log(s, AV_LOG_ERROR, "pkt.size != ds_packet_size * ds_span\n");
784 /* packet descrambling */
785 uint8_t *newdata = av_malloc(asf_st->pkt.size);
788 while (offset < asf_st->pkt.size) {
789 int off = offset / asf_st->ds_chunk_size;
790 int row = off / asf_st->ds_span;
791 int col = off % asf_st->ds_span;
792 int idx = row + col * asf_st->ds_packet_size / asf_st->ds_chunk_size;
793 //printf("off:%d row:%d col:%d idx:%d\n", off, row, col, idx);
795 assert(offset + asf_st->ds_chunk_size <= asf_st->pkt.size);
796 assert(idx+1 <= asf_st->pkt.size / asf_st->ds_chunk_size);
797 memcpy(newdata + offset,
798 asf_st->pkt.data + idx * asf_st->ds_chunk_size,
799 asf_st->ds_chunk_size);
800 offset += asf_st->ds_chunk_size;
802 av_free(asf_st->pkt.data);
803 asf_st->pkt.data = newdata;
807 asf_st->frag_offset = 0;
809 //printf("packet %d %d\n", asf_st->pkt.size, asf->packet_frag_size);
810 asf_st->pkt.size = 0;
811 asf_st->pkt.data = 0;
812 break; // packet completed
818 static int asf_read_close(AVFormatContext *s)
822 for(i=0;i<s->nb_streams;i++) {
823 AVStream *st = s->streams[i];
824 av_free(st->priv_data);
825 av_free(st->codec->palctrl);
830 // Added to support seeking after packets have been read
831 // If information is not reset, read_packet fails due to
832 // leftover information from previous reads
833 static void asf_reset_header(AVFormatContext *s)
835 ASFContext *asf = s->priv_data;
839 asf->packet_nb_frames = 0;
840 asf->packet_size_left = 0;
841 asf->packet_segments = 0;
842 asf->packet_flags = 0;
843 asf->packet_property = 0;
844 asf->packet_timestamp = 0;
845 asf->packet_segsizetype = 0;
846 asf->packet_segments = 0;
848 asf->packet_replic_size = 0;
849 asf->packet_key_frame = 0;
850 asf->packet_padsize = 0;
851 asf->packet_frag_offset = 0;
852 asf->packet_frag_size = 0;
853 asf->packet_frag_timestamp = 0;
854 asf->packet_multi_size = 0;
855 asf->packet_obj_size = 0;
856 asf->packet_time_delta = 0;
857 asf->packet_time_start = 0;
859 for(i=0; i<s->nb_streams; i++){
860 asf_st= s->streams[i]->priv_data;
861 av_free_packet(&asf_st->pkt);
862 asf_st->frag_offset=0;
868 static int64_t asf_read_pts(AVFormatContext *s, int stream_index, int64_t *ppos, int64_t pos_limit)
870 ASFContext *asf = s->priv_data;
871 AVPacket pkt1, *pkt = &pkt1;
876 int64_t start_pos[s->nb_streams];
878 for(i=0; i<s->nb_streams; i++){
882 pos= (pos+asf->packet_size-1-s->data_offset)/asf->packet_size*asf->packet_size+ s->data_offset;
884 url_fseek(&s->pb, pos, SEEK_SET);
886 //printf("asf_read_pts\n");
889 if (av_read_frame(s, pkt) < 0){
890 av_log(s, AV_LOG_INFO, "asf_read_pts failed\n");
891 return AV_NOPTS_VALUE;
897 if(pkt->flags&PKT_FLAG_KEY){
898 i= pkt->stream_index;
900 asf_st= s->streams[i]->priv_data;
902 // assert((asf_st->packet_pos - s->data_offset) % asf->packet_size == 0);
903 pos= asf_st->packet_pos;
905 av_add_index_entry(s->streams[i], pos, pts, pkt->size, pos - start_pos[i] + 1, AVINDEX_KEYFRAME);
906 start_pos[i]= asf_st->packet_pos + 1;
908 if(pkt->stream_index == stream_index)
914 //printf("found keyframe at %"PRId64" stream %d stamp:%"PRId64"\n", *ppos, stream_index, pts);
919 static void asf_build_simple_index(AVFormatContext *s, int stream_index)
922 ASFContext *asf = s->priv_data;
923 int64_t gsize, itime;
924 int64_t pos, current_pos, index_pts;
928 current_pos = url_ftell(&s->pb);
930 url_fseek(&s->pb, asf->data_object_offset + asf->data_object_size, SEEK_SET);
931 get_guid(&s->pb, &g);
932 if (!memcmp(&g, &index_guid, sizeof(GUID))) {
933 gsize = get_le64(&s->pb);
934 get_guid(&s->pb, &g);
935 itime=get_le64(&s->pb);
936 pct=get_le32(&s->pb);
937 ict=get_le32(&s->pb);
938 av_log(NULL, AV_LOG_DEBUG, "itime:0x%"PRIx64", pct:%d, ict:%d\n",itime,pct,ict);
941 int pktnum=get_le32(&s->pb);
942 int pktct =get_le16(&s->pb);
943 av_log(NULL, AV_LOG_DEBUG, "pktnum:%d, pktct:%d\n", pktnum, pktct);
945 pos=s->data_offset + asf->packet_size*(int64_t)pktnum;
946 index_pts=av_rescale(itime, i, 10000);
948 av_add_index_entry(s->streams[stream_index], pos, index_pts, asf->packet_size, 0, AVINDEX_KEYFRAME);
952 url_fseek(&s->pb, current_pos, SEEK_SET);
955 static int asf_read_seek(AVFormatContext *s, int stream_index, int64_t pts, int flags)
957 ASFContext *asf = s->priv_data;
958 AVStream *st = s->streams[stream_index];
962 if (asf->packet_size <= 0)
965 if (!asf->index_read)
966 asf_build_simple_index(s, stream_index);
968 if(!(asf->index_read && st->index_entries)){
969 if(av_seek_frame_binary(s, stream_index, pts, flags)<0)
972 index= av_index_search_timestamp(st, pts, flags);
976 /* find the position */
977 pos = st->index_entries[index].pos;
978 pts = st->index_entries[index].timestamp;
980 // various attempts to find key frame have failed so far
981 // asf_reset_header(s);
982 // url_fseek(&s->pb, pos, SEEK_SET);
984 // for(i=0;i<16;i++){
985 // pos = url_ftell(&s->pb);
986 // if (av_read_frame(s, &pkt) < 0){
987 // av_log(s, AV_LOG_INFO, "seek failed\n");
990 // asf_st = s->streams[stream_index]->priv_data;
991 // pos += st->parser->frame_offset;
993 // if (pkt.size > b) {
998 // av_free_packet(&pkt);
1002 av_log(NULL, AV_LOG_DEBUG, "SEEKTO: %"PRId64"\n", pos);
1003 url_fseek(&s->pb, pos, SEEK_SET);
1005 asf_reset_header(s);
1009 AVInputFormat asf_demuxer = {