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;
149 memset(dar, 0, sizeof(dar));
152 if (memcmp(&g, &asf_header, sizeof(GUID)))
158 memset(&asf->asfid2avid, -1, sizeof(asf->asfid2avid));
161 gsize = get_le64(pb);
163 printf("%08"PRIx64": ", url_ftell(pb) - 24);
165 printf(" size=0x%"PRIx64"\n", gsize);
167 if (!memcmp(&g, &data_header, sizeof(GUID))) {
168 asf->data_object_offset = url_ftell(pb);
169 // if not streaming, gsize is not unlimited (how?), and there is enough space in the file..
170 if (!(asf->hdr.flags & 0x01) && gsize >= 100) {
171 asf->data_object_size = gsize - 24;
173 asf->data_object_size = (uint64_t)-1;
179 if (!memcmp(&g, &file_header, sizeof(GUID))) {
180 get_guid(pb, &asf->hdr.guid);
181 asf->hdr.file_size = get_le64(pb);
182 asf->hdr.create_time = get_le64(pb);
183 asf->nb_packets = get_le64(pb);
184 asf->hdr.send_time = get_le64(pb);
185 asf->hdr.play_time = get_le64(pb);
186 asf->hdr.preroll = get_le32(pb);
187 asf->hdr.ignore = get_le32(pb);
188 asf->hdr.flags = get_le32(pb);
189 asf->hdr.min_pktsize = get_le32(pb);
190 asf->hdr.max_pktsize = get_le32(pb);
191 asf->hdr.max_bitrate = get_le32(pb);
192 asf->packet_size = asf->hdr.max_pktsize;
193 } else if (!memcmp(&g, &stream_header, sizeof(GUID))) {
194 int type, type_specific_size, sizeX;
198 int test_for_ext_stream_audio;
200 pos1 = url_ftell(pb);
202 st = av_new_stream(s, 0);
205 av_set_pts_info(st, 32, 1, 1000); /* 32 bit pts in ms */
206 asf_st = av_mallocz(sizeof(ASFStream));
209 st->priv_data = asf_st;
210 st->start_time = asf->hdr.preroll;
211 if(!(asf->hdr.flags & 0x01)) { // if we aren't streaming...
212 st->duration = asf->hdr.send_time /
213 (10000000 / 1000) - st->start_time;
217 test_for_ext_stream_audio = 0;
218 if (!memcmp(&g, &audio_stream, sizeof(GUID))) {
219 type = CODEC_TYPE_AUDIO;
220 } else if (!memcmp(&g, &video_stream, sizeof(GUID))) {
221 type = CODEC_TYPE_VIDEO;
222 } else if (!memcmp(&g, &command_stream, sizeof(GUID))) {
223 type = CODEC_TYPE_UNKNOWN;
224 } else if (!memcmp(&g, &ext_stream_embed_stream_header, sizeof(GUID))) {
225 test_for_ext_stream_audio = 1;
226 type = CODEC_TYPE_UNKNOWN;
231 total_size = get_le64(pb);
232 type_specific_size = get_le32(pb);
234 st->id = get_le16(pb) & 0x7f; /* stream id */
235 // mapping of asf ID to AV stream ID;
236 asf->asfid2avid[st->id] = s->nb_streams - 1;
240 if (test_for_ext_stream_audio) {
242 if (!memcmp(&g, &ext_stream_audio_stream, sizeof(GUID))) {
243 type = CODEC_TYPE_AUDIO;
253 st->codec->codec_type = type;
254 if (type == CODEC_TYPE_AUDIO) {
255 get_wav_header(pb, st->codec, type_specific_size);
256 st->need_parsing = 1;
257 /* We have to init the frame size at some point .... */
258 pos2 = url_ftell(pb);
259 if (gsize >= (pos2 + 8 - pos1 + 24)) {
260 asf_st->ds_span = get_byte(pb);
261 asf_st->ds_packet_size = get_le16(pb);
262 asf_st->ds_chunk_size = get_le16(pb);
263 get_le16(pb); //ds_data_size
264 get_byte(pb); //ds_silence_data
266 //printf("Descrambling: ps:%d cs:%d ds:%d s:%d sd:%d\n",
267 // asf_st->ds_packet_size, asf_st->ds_chunk_size,
268 // asf_st->ds_data_size, asf_st->ds_span, asf_st->ds_silence_data);
269 if (asf_st->ds_span > 1) {
270 if (!asf_st->ds_chunk_size
271 || (asf_st->ds_packet_size/asf_st->ds_chunk_size <= 1)
272 || asf_st->ds_packet_size % asf_st->ds_chunk_size)
273 asf_st->ds_span = 0; // disable descrambling
275 switch (st->codec->codec_id) {
277 st->codec->frame_size = MPA_FRAME_SIZE;
279 case CODEC_ID_PCM_S16LE:
280 case CODEC_ID_PCM_S16BE:
281 case CODEC_ID_PCM_U16LE:
282 case CODEC_ID_PCM_U16BE:
283 case CODEC_ID_PCM_S8:
284 case CODEC_ID_PCM_U8:
285 case CODEC_ID_PCM_ALAW:
286 case CODEC_ID_PCM_MULAW:
287 st->codec->frame_size = 1;
290 /* This is probably wrong, but it prevents a crash later */
291 st->codec->frame_size = 1;
294 } else if (type == CODEC_TYPE_VIDEO) {
298 size = get_le16(pb); /* size */
299 sizeX= get_le32(pb); /* size */
300 st->codec->width = get_le32(pb);
301 st->codec->height = get_le32(pb);
302 /* not available for asf */
303 get_le16(pb); /* panes */
304 st->codec->bits_per_sample = get_le16(pb); /* depth */
307 // av_log(NULL, AV_LOG_DEBUG, "size:%d tsize:%d sizeX:%d\n", size, total_size, sizeX);
310 st->codec->extradata_size = size - 40;
311 st->codec->extradata = av_mallocz(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
312 get_buffer(pb, st->codec->extradata, st->codec->extradata_size);
315 /* Extract palette from extradata if bpp <= 8 */
316 /* This code assumes that extradata contains only palette */
317 /* This is true for all paletted codecs implemented in ffmpeg */
318 if (st->codec->extradata_size && (st->codec->bits_per_sample <= 8)) {
319 st->codec->palctrl = av_mallocz(sizeof(AVPaletteControl));
320 #ifdef WORDS_BIGENDIAN
321 for (i = 0; i < FFMIN(st->codec->extradata_size, AVPALETTE_SIZE)/4; i++)
322 st->codec->palctrl->palette[i] = bswap_32(((uint32_t*)st->codec->extradata)[i]);
324 memcpy(st->codec->palctrl->palette, st->codec->extradata,
325 FFMIN(st->codec->extradata_size, AVPALETTE_SIZE));
327 st->codec->palctrl->palette_changed = 1;
330 st->codec->codec_tag = tag1;
331 st->codec->codec_id = codec_get_id(codec_bmp_tags, tag1);
332 if(tag1 == MKTAG('D', 'V', 'R', ' '))
333 st->need_parsing = 1;
335 pos2 = url_ftell(pb);
336 url_fskip(pb, gsize - (pos2 - pos1 + 24));
337 } else if (!memcmp(&g, &comment_header, sizeof(GUID))) {
338 int len1, len2, len3, len4, len5;
345 get_str16_nolen(pb, len1, s->title , sizeof(s->title));
346 get_str16_nolen(pb, len2, s->author , sizeof(s->author));
347 get_str16_nolen(pb, len3, s->copyright, sizeof(s->copyright));
348 get_str16_nolen(pb, len4, s->comment , sizeof(s->comment));
350 } else if (!memcmp(&g, &stream_bitrate_guid, sizeof(GUID))) {
351 int stream_count = get_le16(pb);
354 // av_log(NULL, AV_LOG_ERROR, "stream bitrate properties\n");
355 // av_log(NULL, AV_LOG_ERROR, "streams %d\n", streams);
356 for(j = 0; j < stream_count; j++) {
357 int flags, bitrate, stream_id;
360 bitrate= get_le32(pb);
361 stream_id= (flags & 0x7f);
362 // av_log(NULL, AV_LOG_ERROR, "flags: 0x%x stream id %d, bitrate %d\n", flags, stream_id, bitrate);
363 asf->stream_bitrates[stream_id-1]= bitrate;
365 } else if (!memcmp(&g, &extended_content_header, sizeof(GUID))) {
368 desc_count = get_le16(pb);
369 for(i=0;i<desc_count;i++)
371 int name_len,value_type,value_len;
372 uint64_t value_num = 0;
375 name_len = get_le16(pb);
376 get_str16_nolen(pb, name_len, name, sizeof(name));
377 value_type = get_le16(pb);
378 value_len = get_le16(pb);
379 if ((value_type == 0) || (value_type == 1)) // unicode or byte
381 if (!strcmp(name,"WM/AlbumTitle")) get_str16_nolen(pb, value_len, s->album, sizeof(s->album));
382 else if(!strcmp(name,"WM/Genre" )) get_str16_nolen(pb, value_len, s->genre, sizeof(s->genre));
383 else url_fskip(pb, value_len);
385 if ((value_type >= 2) && (value_type <= 5)) // boolean or DWORD or QWORD or WORD
387 value_num= get_value(pb, value_type);
388 if (!strcmp(name,"WM/Track" )) s->track = value_num + 1;
389 if (!strcmp(name,"WM/TrackNumber")) s->track = value_num;
392 } else if (!memcmp(&g, &metadata_header, sizeof(GUID))) {
393 int n, stream_num, name_len, value_len, value_type, value_num;
399 get_le16(pb); //lang_list_index
400 stream_num= get_le16(pb);
401 name_len= get_le16(pb);
402 value_type= get_le16(pb);
403 value_len= get_le32(pb);
405 get_str16_nolen(pb, name_len, name, sizeof(name));
406 //av_log(NULL, AV_LOG_ERROR, "%d %d %d %d %d <%s>\n", i, stream_num, name_len, value_type, value_len, name);
407 value_num= get_le16(pb);//we should use get_value() here but it doesnt work 2 is le16 here but le32 elsewhere
408 url_fskip(pb, value_len - 2);
411 if (!strcmp(name, "AspectRatioX")) dar[stream_num].num= value_num;
412 else if(!strcmp(name, "AspectRatioY")) dar[stream_num].den= value_num;
415 } else if (!memcmp(&g, &ext_stream_header, sizeof(GUID))) {
416 int ext_len, payload_ext_ct, stream_ct;
419 pos_ex_st = url_ftell(pb);
421 get_le64(pb); // starttime
422 get_le64(pb); // endtime
423 get_le32(pb); // leak-datarate
424 get_le32(pb); // bucket-datasize
425 get_le32(pb); // init-bucket-fullness
426 get_le32(pb); // alt-leak-datarate
427 get_le32(pb); // alt-bucket-datasize
428 get_le32(pb); // alt-init-bucket-fullness
429 get_le32(pb); // max-object-size
430 get_le32(pb); // flags (reliable,seekable,no_cleanpoints?,resend-live-cleanpoints, rest of bits reserved)
431 get_le16(pb); // stream-num
432 get_le16(pb); // stream-language-id-index
433 get_le64(pb); // avg frametime in 100ns units
434 stream_ct = get_le16(pb); //stream-name-count
435 payload_ext_ct = get_le16(pb); //payload-extension-system-count
437 for (i=0; i<stream_ct; i++){
439 ext_len = get_le16(pb);
440 url_fseek(pb, ext_len, SEEK_CUR);
443 for (i=0; i<payload_ext_ct; i++){
446 ext_len=get_le32(pb);
447 url_fseek(pb, ext_len, SEEK_CUR);
450 // there could be a optional stream properties object to follow
451 // if so the next iteration will pick it up
452 } else if (!memcmp(&g, &head1_guid, sizeof(GUID))) {
458 } else if (!memcmp(&g, &codec_comment_header, sizeof(GUID))) {
468 num = get_le16(pb); /* stream number */
469 get_str16(pb, str, sizeof(str));
470 get_str16(pb, str, sizeof(str));
475 if ((q - tag) < sizeof(tag) - 1)
482 } else if (url_feof(pb)) {
485 url_fseek(pb, gsize - 24, SEEK_CUR);
494 asf->data_offset = url_ftell(pb);
495 asf->packet_size_left = 0;
498 for(i=0; i<128; i++){
499 int stream_num= asf->asfid2avid[i];
500 if(stream_num>=0 && dar[i].num>0 && dar[i].den>0){
501 AVCodecContext *codec= s->streams[stream_num]->codec;
502 av_reduce(&codec->sample_aspect_ratio.num,
503 &codec->sample_aspect_ratio.den,
504 dar[i].num, dar[i].den, INT_MAX);
505 //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);
512 for(i=0;i<s->nb_streams;i++) {
513 AVStream *st = s->streams[i];
515 av_free(st->priv_data);
516 av_free(st->codec->extradata);
523 #define DO_2BITS(bits, var, defval) \
526 case 3: var = get_le32(pb); rsize += 4; break; \
527 case 2: var = get_le16(pb); rsize += 2; break; \
528 case 1: var = get_byte(pb); rsize++; break; \
529 default: var = defval; break; \
534 * @return <0 in case of an error
536 static int asf_get_packet(AVFormatContext *s)
538 ASFContext *asf = s->priv_data;
539 ByteIOContext *pb = &s->pb;
540 uint32_t packet_length, padsize;
544 off= (url_ftell(&s->pb) - s->data_offset) % asf->packet_size + 3;
550 if(c == 0x82 && !d && !e)
556 av_log(s, AV_LOG_ERROR, "ff asf bad header %x at:%"PRId64"\n", c, url_ftell(pb));
558 if ((c & 0x8f) == 0x82) {
561 av_log(s, AV_LOG_ERROR, "ff asf bad non zero\n");
568 url_fseek(pb, -1, SEEK_CUR); //FIXME
571 asf->packet_flags = c;
572 asf->packet_property = d;
574 DO_2BITS(asf->packet_flags >> 5, packet_length, asf->packet_size);
575 DO_2BITS(asf->packet_flags >> 1, padsize, 0); // sequence ignored
576 DO_2BITS(asf->packet_flags >> 3, padsize, 0); // padding length
578 //the following checks prevent overflows and infinite loops
579 if(packet_length >= (1U<<29)){
580 av_log(s, AV_LOG_ERROR, "invalid packet_length %d at:%"PRId64"\n", packet_length, url_ftell(pb));
583 if(padsize >= packet_length){
584 av_log(s, AV_LOG_ERROR, "invalid padsize %d at:%"PRId64"\n", padsize, url_ftell(pb));
588 asf->packet_timestamp = get_le32(pb);
589 get_le16(pb); /* duration */
590 // rsize has at least 11 bytes which have to be present
592 if (asf->packet_flags & 0x01) {
593 asf->packet_segsizetype = get_byte(pb); rsize++;
594 asf->packet_segments = asf->packet_segsizetype & 0x3f;
596 asf->packet_segments = 1;
597 asf->packet_segsizetype = 0x80;
599 asf->packet_size_left = packet_length - padsize - rsize;
600 if (packet_length < asf->hdr.min_pktsize)
601 padsize += asf->hdr.min_pktsize - packet_length;
602 asf->packet_padsize = padsize;
604 printf("packet: size=%d padsize=%d left=%d\n", asf->packet_size, asf->packet_padsize, asf->packet_size_left);
611 * @return <0 if error
613 static int asf_read_frame_header(AVFormatContext *s){
614 ASFContext *asf = s->priv_data;
615 ByteIOContext *pb = &s->pb;
617 int num = get_byte(pb);
620 asf->packet_segments--;
621 asf->packet_key_frame = num >> 7;
622 asf->stream_index = asf->asfid2avid[num & 0x7f];
623 // sequence should be ignored!
624 DO_2BITS(asf->packet_property >> 4, asf->packet_seq, 0);
625 DO_2BITS(asf->packet_property >> 2, asf->packet_frag_offset, 0);
626 DO_2BITS(asf->packet_property, asf->packet_replic_size, 0);
627 //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);
628 if (asf->packet_replic_size >= 8) {
629 asf->packet_obj_size = get_le32(pb);
630 if(asf->packet_obj_size >= (1<<24) || asf->packet_obj_size <= 0){
631 av_log(s, AV_LOG_ERROR, "packet_obj_size invalid\n");
634 asf->packet_frag_timestamp = get_le32(pb); // timestamp
635 if(asf->packet_replic_size >= 8+38+4){
636 // for(i=0; i<asf->packet_replic_size-8; i++)
637 // av_log(s, AV_LOG_DEBUG, "%02X ",get_byte(pb));
638 // av_log(s, AV_LOG_DEBUG, "\n");
644 url_fskip(pb, asf->packet_replic_size - 8 - 38 - 4);
645 if(ts0!= -1) asf->packet_frag_timestamp= ts0/10000;
646 else asf->packet_frag_timestamp= AV_NOPTS_VALUE;
648 url_fskip(pb, asf->packet_replic_size - 8);
649 rsize += asf->packet_replic_size; // FIXME - check validity
650 } else if (asf->packet_replic_size==1){
651 // multipacket - frag_offset is begining timestamp
652 asf->packet_time_start = asf->packet_frag_offset;
653 asf->packet_frag_offset = 0;
654 asf->packet_frag_timestamp = asf->packet_timestamp;
656 asf->packet_time_delta = get_byte(pb);
658 }else if(asf->packet_replic_size!=0){
659 av_log(s, AV_LOG_ERROR, "unexpected packet_replic_size of %d\n", asf->packet_replic_size);
662 if (asf->packet_flags & 0x01) {
663 DO_2BITS(asf->packet_segsizetype >> 6, asf->packet_frag_size, 0); // 0 is illegal
664 if(asf->packet_frag_size > asf->packet_size_left - rsize){
665 av_log(s, AV_LOG_ERROR, "packet_frag_size is invalid\n");
668 //printf("Fragsize %d\n", asf->packet_frag_size);
670 asf->packet_frag_size = asf->packet_size_left - rsize;
671 //printf("Using rest %d %d %d\n", asf->packet_frag_size, asf->packet_size_left, rsize);
673 if (asf->packet_replic_size == 1) {
674 asf->packet_multi_size = asf->packet_frag_size;
675 if (asf->packet_multi_size > asf->packet_size_left)
678 asf->packet_size_left -= rsize;
679 //printf("___objsize____ %d %d rs:%d\n", asf->packet_obj_size, asf->packet_frag_offset, rsize);
684 static int asf_read_packet(AVFormatContext *s, AVPacket *pkt)
686 ASFContext *asf = s->priv_data;
687 ASFStream *asf_st = 0;
688 ByteIOContext *pb = &s->pb;
693 if (asf->packet_size_left < FRAME_HEADER_SIZE
694 || asf->packet_segments < 1) {
695 //asf->packet_size_left <= asf->packet_padsize) {
696 int ret = asf->packet_size_left + asf->packet_padsize;
697 //printf("PacketLeftSize:%d Pad:%d Pos:%"PRId64"\n", asf->packet_size_left, asf->packet_padsize, url_ftell(pb));
702 asf->packet_pos= url_ftell(&s->pb);
703 if (asf->data_object_size != (uint64_t)-1 &&
704 (asf->packet_pos - asf->data_object_offset >= asf->data_object_size))
705 return AVERROR_IO; /* Do not exceed the size of the data object */
706 ret = asf_get_packet(s);
707 //printf("READ ASF PACKET %d r:%d c:%d\n", ret, asf->packet_size_left, pc++);
709 assert(asf->packet_size_left < FRAME_HEADER_SIZE || asf->packet_segments < 1);
710 asf->packet_time_start = 0;
713 if (asf->packet_time_start == 0) {
714 if(asf_read_frame_header(s) < 0){
715 asf->packet_segments= 0;
718 if (asf->stream_index < 0
719 || s->streams[asf->stream_index]->discard >= AVDISCARD_ALL
720 || (!asf->packet_key_frame && s->streams[asf->stream_index]->discard >= AVDISCARD_NONKEY)
722 asf->packet_time_start = 0;
723 /* unhandled packet (should not happen) */
724 url_fskip(pb, asf->packet_frag_size);
725 asf->packet_size_left -= asf->packet_frag_size;
726 if(asf->stream_index < 0)
727 av_log(s, AV_LOG_ERROR, "ff asf skip %d (unknown stream)\n", asf->packet_frag_size);
730 asf->asf_st = s->streams[asf->stream_index]->priv_data;
732 asf_st = asf->asf_st;
734 if (asf->packet_replic_size == 1) {
735 // frag_offset is here used as the begining timestamp
736 asf->packet_frag_timestamp = asf->packet_time_start;
737 asf->packet_time_start += asf->packet_time_delta;
738 asf->packet_obj_size = asf->packet_frag_size = get_byte(pb);
739 asf->packet_size_left--;
740 asf->packet_multi_size--;
741 if (asf->packet_multi_size < asf->packet_obj_size)
743 asf->packet_time_start = 0;
744 url_fskip(pb, asf->packet_multi_size);
745 asf->packet_size_left -= asf->packet_multi_size;
748 asf->packet_multi_size -= asf->packet_obj_size;
749 //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);
751 if ( asf_st->pkt.size != asf->packet_obj_size
752 || asf_st->frag_offset + asf->packet_frag_size > asf_st->pkt.size) { //FIXME is this condition sufficient?
753 if(asf_st->pkt.data){
754 av_log(s, AV_LOG_INFO, "freeing incomplete packet size %d, new %d\n", asf_st->pkt.size, asf->packet_obj_size);
755 asf_st->frag_offset = 0;
756 av_free_packet(&asf_st->pkt);
759 av_new_packet(&asf_st->pkt, asf->packet_obj_size);
760 asf_st->seq = asf->packet_seq;
761 asf_st->pkt.pts = asf->packet_frag_timestamp;
762 asf_st->pkt.stream_index = asf->stream_index;
764 asf_st->packet_pos= asf->packet_pos;
765 //printf("new packet: stream:%d key:%d packet_key:%d audio:%d size:%d\n",
766 //asf->stream_index, asf->packet_key_frame, asf_st->pkt.flags & PKT_FLAG_KEY,
767 //s->streams[asf->stream_index]->codec->codec_type == CODEC_TYPE_AUDIO, asf->packet_obj_size);
768 if (s->streams[asf->stream_index]->codec->codec_type == CODEC_TYPE_AUDIO)
769 asf->packet_key_frame = 1;
770 if (asf->packet_key_frame)
771 asf_st->pkt.flags |= PKT_FLAG_KEY;
775 //printf("READ PACKET s:%d os:%d o:%d,%d l:%d DATA:%p\n",
776 // asf->packet_size, asf_st->pkt.size, asf->packet_frag_offset,
777 // asf_st->frag_offset, asf->packet_frag_size, asf_st->pkt.data);
778 asf->packet_size_left -= asf->packet_frag_size;
779 if (asf->packet_size_left < 0)
782 if( asf->packet_frag_offset >= asf_st->pkt.size
783 || asf->packet_frag_size > asf_st->pkt.size - asf->packet_frag_offset){
784 av_log(s, AV_LOG_ERROR, "packet fragment position invalid %u,%u not in %u\n",
785 asf->packet_frag_offset, asf->packet_frag_size, asf_st->pkt.size);
789 get_buffer(pb, asf_st->pkt.data + asf->packet_frag_offset,
790 asf->packet_frag_size);
791 asf_st->frag_offset += asf->packet_frag_size;
792 /* test if whole packet is read */
793 if (asf_st->frag_offset == asf_st->pkt.size) {
795 if (asf_st->ds_span > 1) {
796 if(asf_st->pkt.size != asf_st->ds_packet_size * asf_st->ds_span){
797 av_log(s, AV_LOG_ERROR, "pkt.size != ds_packet_size * ds_span\n");
799 /* packet descrambling */
800 uint8_t *newdata = av_malloc(asf_st->pkt.size);
803 while (offset < asf_st->pkt.size) {
804 int off = offset / asf_st->ds_chunk_size;
805 int row = off / asf_st->ds_span;
806 int col = off % asf_st->ds_span;
807 int idx = row + col * asf_st->ds_packet_size / asf_st->ds_chunk_size;
808 //printf("off:%d row:%d col:%d idx:%d\n", off, row, col, idx);
810 assert(offset + asf_st->ds_chunk_size <= asf_st->pkt.size);
811 assert(idx+1 <= asf_st->pkt.size / asf_st->ds_chunk_size);
812 memcpy(newdata + offset,
813 asf_st->pkt.data + idx * asf_st->ds_chunk_size,
814 asf_st->ds_chunk_size);
815 offset += asf_st->ds_chunk_size;
817 av_free(asf_st->pkt.data);
818 asf_st->pkt.data = newdata;
822 asf_st->frag_offset = 0;
824 //printf("packet %d %d\n", asf_st->pkt.size, asf->packet_frag_size);
825 asf_st->pkt.size = 0;
826 asf_st->pkt.data = 0;
827 break; // packet completed
833 static int asf_read_close(AVFormatContext *s)
837 for(i=0;i<s->nb_streams;i++) {
838 AVStream *st = s->streams[i];
839 av_free(st->priv_data);
840 av_free(st->codec->palctrl);
845 // Added to support seeking after packets have been read
846 // If information is not reset, read_packet fails due to
847 // leftover information from previous reads
848 static void asf_reset_header(AVFormatContext *s)
850 ASFContext *asf = s->priv_data;
854 asf->packet_nb_frames = 0;
855 asf->packet_size_left = 0;
856 asf->packet_segments = 0;
857 asf->packet_flags = 0;
858 asf->packet_property = 0;
859 asf->packet_timestamp = 0;
860 asf->packet_segsizetype = 0;
861 asf->packet_segments = 0;
863 asf->packet_replic_size = 0;
864 asf->packet_key_frame = 0;
865 asf->packet_padsize = 0;
866 asf->packet_frag_offset = 0;
867 asf->packet_frag_size = 0;
868 asf->packet_frag_timestamp = 0;
869 asf->packet_multi_size = 0;
870 asf->packet_obj_size = 0;
871 asf->packet_time_delta = 0;
872 asf->packet_time_start = 0;
874 for(i=0; i<s->nb_streams; i++){
875 asf_st= s->streams[i]->priv_data;
876 av_free_packet(&asf_st->pkt);
877 asf_st->frag_offset=0;
883 static int64_t asf_read_pts(AVFormatContext *s, int stream_index, int64_t *ppos, int64_t pos_limit)
885 ASFContext *asf = s->priv_data;
886 AVPacket pkt1, *pkt = &pkt1;
891 int64_t start_pos[s->nb_streams];
893 for(i=0; i<s->nb_streams; i++){
897 pos= (pos+asf->packet_size-1-s->data_offset)/asf->packet_size*asf->packet_size+ s->data_offset;
899 url_fseek(&s->pb, pos, SEEK_SET);
901 //printf("asf_read_pts\n");
904 if (av_read_frame(s, pkt) < 0){
905 av_log(s, AV_LOG_INFO, "asf_read_pts failed\n");
906 return AV_NOPTS_VALUE;
912 if(pkt->flags&PKT_FLAG_KEY){
913 i= pkt->stream_index;
915 asf_st= s->streams[i]->priv_data;
917 // assert((asf_st->packet_pos - s->data_offset) % asf->packet_size == 0);
918 pos= asf_st->packet_pos;
920 av_add_index_entry(s->streams[i], pos, pts, pkt->size, pos - start_pos[i] + 1, AVINDEX_KEYFRAME);
921 start_pos[i]= asf_st->packet_pos + 1;
923 if(pkt->stream_index == stream_index)
929 //printf("found keyframe at %"PRId64" stream %d stamp:%"PRId64"\n", *ppos, stream_index, pts);
934 static void asf_build_simple_index(AVFormatContext *s, int stream_index)
937 ASFContext *asf = s->priv_data;
938 int64_t gsize, itime;
939 int64_t pos, current_pos, index_pts;
943 current_pos = url_ftell(&s->pb);
945 url_fseek(&s->pb, asf->data_object_offset + asf->data_object_size, SEEK_SET);
946 get_guid(&s->pb, &g);
947 if (!memcmp(&g, &index_guid, sizeof(GUID))) {
948 gsize = get_le64(&s->pb);
949 get_guid(&s->pb, &g);
950 itime=get_le64(&s->pb);
951 pct=get_le32(&s->pb);
952 ict=get_le32(&s->pb);
953 av_log(NULL, AV_LOG_DEBUG, "itime:0x%"PRIx64", pct:%d, ict:%d\n",itime,pct,ict);
956 int pktnum=get_le32(&s->pb);
957 int pktct =get_le16(&s->pb);
958 av_log(NULL, AV_LOG_DEBUG, "pktnum:%d, pktct:%d\n", pktnum, pktct);
960 pos=s->data_offset + asf->packet_size*(int64_t)pktnum;
961 index_pts=av_rescale(itime, i, 10000);
963 av_add_index_entry(s->streams[stream_index], pos, index_pts, asf->packet_size, 0, AVINDEX_KEYFRAME);
967 url_fseek(&s->pb, current_pos, SEEK_SET);
970 static int asf_read_seek(AVFormatContext *s, int stream_index, int64_t pts, int flags)
972 ASFContext *asf = s->priv_data;
973 AVStream *st = s->streams[stream_index];
977 if (asf->packet_size <= 0)
980 if (!asf->index_read)
981 asf_build_simple_index(s, stream_index);
983 if(!(asf->index_read && st->index_entries)){
984 if(av_seek_frame_binary(s, stream_index, pts, flags)<0)
987 index= av_index_search_timestamp(st, pts, flags);
991 /* find the position */
992 pos = st->index_entries[index].pos;
993 pts = st->index_entries[index].timestamp;
995 // various attempts to find key frame have failed so far
996 // asf_reset_header(s);
997 // url_fseek(&s->pb, pos, SEEK_SET);
999 // for(i=0;i<16;i++){
1000 // pos = url_ftell(&s->pb);
1001 // if (av_read_frame(s, &pkt) < 0){
1002 // av_log(s, AV_LOG_INFO, "seek failed\n");
1005 // asf_st = s->streams[stream_index]->priv_data;
1006 // pos += st->parser->frame_offset;
1008 // if (pkt.size > b) {
1013 // av_free_packet(&pkt);
1017 av_log(NULL, AV_LOG_DEBUG, "SEEKTO: %"PRId64"\n", pos);
1018 url_fseek(&s->pb, pos, SEEK_SET);
1020 asf_reset_header(s);
1024 AVInputFormat asf_demuxer = {