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
22 #include "libavutil/common.h"
23 #include "libavcodec/mpegaudio.h"
29 void ff_mms_set_stream_selection(URLContext *h, AVFormatContext *format);
34 #define FRAME_HEADER_SIZE 17
35 // Fix Me! FRAME_HEADER_SIZE may be different.
37 static const GUID index_guid = {
38 0x90, 0x08, 0x00, 0x33, 0xb1, 0xe5, 0xcf, 0x11, 0x89, 0xf4, 0x00, 0xa0, 0xc9, 0x03, 0x49, 0xcb
41 static const GUID stream_bitrate_guid = { /* (http://get.to/sdp) */
42 0xce, 0x75, 0xf8, 0x7b, 0x8d, 0x46, 0xd1, 0x11, 0x8d, 0x82, 0x00, 0x60, 0x97, 0xc9, 0xa2, 0xb2
44 /**********************************/
50 #define PRINT_IF_GUID(g,cmp) \
51 if (!memcmp(g, &cmp, sizeof(GUID))) \
52 dprintf(NULL, "(GUID: %s) ", #cmp)
54 static void print_guid(const GUID *g)
57 PRINT_IF_GUID(g, asf_header);
58 else PRINT_IF_GUID(g, file_header);
59 else PRINT_IF_GUID(g, stream_header);
60 else PRINT_IF_GUID(g, audio_stream);
61 else PRINT_IF_GUID(g, audio_conceal_none);
62 else PRINT_IF_GUID(g, video_stream);
63 else PRINT_IF_GUID(g, video_conceal_none);
64 else PRINT_IF_GUID(g, command_stream);
65 else PRINT_IF_GUID(g, comment_header);
66 else PRINT_IF_GUID(g, codec_comment_header);
67 else PRINT_IF_GUID(g, codec_comment1_header);
68 else PRINT_IF_GUID(g, data_header);
69 else PRINT_IF_GUID(g, index_guid);
70 else PRINT_IF_GUID(g, head1_guid);
71 else PRINT_IF_GUID(g, head2_guid);
72 else PRINT_IF_GUID(g, my_guid);
73 else PRINT_IF_GUID(g, ext_stream_header);
74 else PRINT_IF_GUID(g, extended_content_header);
75 else PRINT_IF_GUID(g, ext_stream_embed_stream_header);
76 else PRINT_IF_GUID(g, ext_stream_audio_stream);
77 else PRINT_IF_GUID(g, metadata_header);
78 else PRINT_IF_GUID(g, stream_bitrate_guid);
80 dprintf(NULL, "(GUID: unknown) ");
82 dprintf(NULL, " 0x%02x,", (*g)[i]);
90 static void get_guid(ByteIOContext *s, GUID *g)
92 assert(sizeof(*g) == 16);
93 get_buffer(s, *g, sizeof(*g));
97 static void get_str16(ByteIOContext *pb, char *buf, int buf_size)
106 if ((q - buf) < buf_size - 1)
114 static void get_str16_nolen(ByteIOContext *pb, int len, char *buf, int buf_size)
120 PUT_UTF8(get_le16(pb), tmp, if (q - buf < buf_size - 1) *q++ = tmp;)
125 static int asf_probe(AVProbeData *pd)
127 /* check file header */
128 if (!memcmp(pd->buf, &asf_header, sizeof(GUID)))
129 return AVPROBE_SCORE_MAX;
134 static int get_value(ByteIOContext *pb, int type){
136 case 2: return get_le32(pb);
137 case 3: return get_le32(pb);
138 case 4: return get_le64(pb);
139 case 5: return get_le16(pb);
140 default:return INT_MIN;
144 static int asf_read_header(AVFormatContext *s, AVFormatParameters *ap)
146 ASFContext *asf = s->priv_data;
148 ByteIOContext *pb = s->pb;
154 uint32_t bitrate[128];
156 memset(dar, 0, sizeof(dar));
157 memset(bitrate, 0, sizeof(bitrate));
160 if (memcmp(&g, &asf_header, sizeof(GUID)))
166 memset(&asf->asfid2avid, -1, sizeof(asf->asfid2avid));
169 gsize = get_le64(pb);
170 dprintf(s, "%08"PRIx64": ", url_ftell(pb) - 24);
172 dprintf(s, " size=0x%"PRIx64"\n", gsize);
173 if (!memcmp(&g, &data_header, sizeof(GUID))) {
174 asf->data_object_offset = url_ftell(pb);
175 // if not streaming, gsize is not unlimited (how?), and there is enough space in the file..
176 if (!(asf->hdr.flags & 0x01) && gsize >= 100) {
177 asf->data_object_size = gsize - 24;
179 asf->data_object_size = (uint64_t)-1;
185 if (!memcmp(&g, &file_header, sizeof(GUID))) {
186 get_guid(pb, &asf->hdr.guid);
187 asf->hdr.file_size = get_le64(pb);
188 asf->hdr.create_time = get_le64(pb);
189 asf->nb_packets = get_le64(pb);
190 asf->hdr.play_time = get_le64(pb);
191 asf->hdr.send_time = get_le64(pb);
192 asf->hdr.preroll = get_le32(pb);
193 asf->hdr.ignore = get_le32(pb);
194 asf->hdr.flags = get_le32(pb);
195 asf->hdr.min_pktsize = get_le32(pb);
196 asf->hdr.max_pktsize = get_le32(pb);
197 asf->hdr.max_bitrate = get_le32(pb);
198 asf->packet_size = asf->hdr.max_pktsize;
199 } else if (!memcmp(&g, &stream_header, sizeof(GUID))) {
201 int type_specific_size, sizeX;
204 int64_t pos1, pos2, start_time;
205 int test_for_ext_stream_audio, is_dvr_ms_audio=0;
207 pos1 = url_ftell(pb);
209 st = av_new_stream(s, 0);
211 return AVERROR(ENOMEM);
212 av_set_pts_info(st, 32, 1, 1000); /* 32 bit pts in ms */
213 asf_st = av_mallocz(sizeof(ASFStream));
215 return AVERROR(ENOMEM);
216 st->priv_data = asf_st;
217 start_time = asf->hdr.preroll;
219 if(!(asf->hdr.flags & 0x01)) { // if we aren't streaming...
220 st->duration = asf->hdr.send_time /
221 (10000000 / 1000) - start_time;
225 test_for_ext_stream_audio = 0;
226 if (!memcmp(&g, &audio_stream, sizeof(GUID))) {
227 type = CODEC_TYPE_AUDIO;
228 } else if (!memcmp(&g, &video_stream, sizeof(GUID))) {
229 type = CODEC_TYPE_VIDEO;
230 } else if (!memcmp(&g, &command_stream, sizeof(GUID))) {
231 type = CODEC_TYPE_DATA;
232 } else if (!memcmp(&g, &ext_stream_embed_stream_header, sizeof(GUID))) {
233 test_for_ext_stream_audio = 1;
234 type = CODEC_TYPE_UNKNOWN;
239 total_size = get_le64(pb);
240 type_specific_size = get_le32(pb);
242 st->id = get_le16(pb) & 0x7f; /* stream id */
243 // mapping of asf ID to AV stream ID;
244 asf->asfid2avid[st->id] = s->nb_streams - 1;
248 if (test_for_ext_stream_audio) {
250 if (!memcmp(&g, &ext_stream_audio_stream, sizeof(GUID))) {
251 type = CODEC_TYPE_AUDIO;
262 st->codec->codec_type = type;
263 if (type == CODEC_TYPE_AUDIO) {
264 get_wav_header(pb, st->codec, type_specific_size);
265 if (is_dvr_ms_audio) {
266 // codec_id and codec_tag are unreliable in dvr_ms
267 // files. Set them later by probing stream.
268 st->codec->codec_id = CODEC_ID_PROBE;
269 st->codec->codec_tag = 0;
271 st->need_parsing = AVSTREAM_PARSE_FULL;
272 /* We have to init the frame size at some point .... */
273 pos2 = url_ftell(pb);
274 if (gsize >= (pos2 + 8 - pos1 + 24)) {
275 asf_st->ds_span = get_byte(pb);
276 asf_st->ds_packet_size = get_le16(pb);
277 asf_st->ds_chunk_size = get_le16(pb);
278 get_le16(pb); //ds_data_size
279 get_byte(pb); //ds_silence_data
281 //printf("Descrambling: ps:%d cs:%d ds:%d s:%d sd:%d\n",
282 // asf_st->ds_packet_size, asf_st->ds_chunk_size,
283 // asf_st->ds_data_size, asf_st->ds_span, asf_st->ds_silence_data);
284 if (asf_st->ds_span > 1) {
285 if (!asf_st->ds_chunk_size
286 || (asf_st->ds_packet_size/asf_st->ds_chunk_size <= 1)
287 || asf_st->ds_packet_size % asf_st->ds_chunk_size)
288 asf_st->ds_span = 0; // disable descrambling
290 switch (st->codec->codec_id) {
292 st->codec->frame_size = MPA_FRAME_SIZE;
294 case CODEC_ID_PCM_S16LE:
295 case CODEC_ID_PCM_S16BE:
296 case CODEC_ID_PCM_U16LE:
297 case CODEC_ID_PCM_U16BE:
298 case CODEC_ID_PCM_S8:
299 case CODEC_ID_PCM_U8:
300 case CODEC_ID_PCM_ALAW:
301 case CODEC_ID_PCM_MULAW:
302 st->codec->frame_size = 1;
305 /* This is probably wrong, but it prevents a crash later */
306 st->codec->frame_size = 1;
309 } else if (type == CODEC_TYPE_VIDEO) {
313 size = get_le16(pb); /* size */
314 sizeX= get_le32(pb); /* size */
315 st->codec->width = get_le32(pb);
316 st->codec->height = get_le32(pb);
317 /* not available for asf */
318 get_le16(pb); /* panes */
319 st->codec->bits_per_coded_sample = get_le16(pb); /* depth */
322 // av_log(NULL, AV_LOG_DEBUG, "size:%d tsize:%d sizeX:%d\n", size, total_size, sizeX);
325 st->codec->extradata_size = size - 40;
326 st->codec->extradata = av_mallocz(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
327 get_buffer(pb, st->codec->extradata, st->codec->extradata_size);
330 /* Extract palette from extradata if bpp <= 8 */
331 /* This code assumes that extradata contains only palette */
332 /* This is true for all paletted codecs implemented in ffmpeg */
333 if (st->codec->extradata_size && (st->codec->bits_per_coded_sample <= 8)) {
334 st->codec->palctrl = av_mallocz(sizeof(AVPaletteControl));
335 #ifdef WORDS_BIGENDIAN
336 for (i = 0; i < FFMIN(st->codec->extradata_size, AVPALETTE_SIZE)/4; i++)
337 st->codec->palctrl->palette[i] = bswap_32(((uint32_t*)st->codec->extradata)[i]);
339 memcpy(st->codec->palctrl->palette, st->codec->extradata,
340 FFMIN(st->codec->extradata_size, AVPALETTE_SIZE));
342 st->codec->palctrl->palette_changed = 1;
345 st->codec->codec_tag = tag1;
346 st->codec->codec_id = codec_get_id(codec_bmp_tags, tag1);
347 if(tag1 == MKTAG('D', 'V', 'R', ' '))
348 st->need_parsing = AVSTREAM_PARSE_FULL;
350 pos2 = url_ftell(pb);
351 url_fskip(pb, gsize - (pos2 - pos1 + 24));
352 } else if (!memcmp(&g, &comment_header, sizeof(GUID))) {
353 int len1, len2, len3, len4, len5;
360 get_str16_nolen(pb, len1, s->title , sizeof(s->title));
361 get_str16_nolen(pb, len2, s->author , sizeof(s->author));
362 get_str16_nolen(pb, len3, s->copyright, sizeof(s->copyright));
363 get_str16_nolen(pb, len4, s->comment , sizeof(s->comment));
365 } else if (!memcmp(&g, &stream_bitrate_guid, sizeof(GUID))) {
366 int stream_count = get_le16(pb);
369 // av_log(NULL, AV_LOG_ERROR, "stream bitrate properties\n");
370 // av_log(NULL, AV_LOG_ERROR, "streams %d\n", streams);
371 for(j = 0; j < stream_count; j++) {
372 int flags, bitrate, stream_id;
375 bitrate= get_le32(pb);
376 stream_id= (flags & 0x7f);
377 // av_log(NULL, AV_LOG_ERROR, "flags: 0x%x stream id %d, bitrate %d\n", flags, stream_id, bitrate);
378 asf->stream_bitrates[stream_id]= bitrate;
380 } else if (!memcmp(&g, &extended_content_header, sizeof(GUID))) {
383 desc_count = get_le16(pb);
384 for(i=0;i<desc_count;i++)
386 int name_len,value_type,value_len;
387 uint64_t value_num = 0;
390 name_len = get_le16(pb);
391 get_str16_nolen(pb, name_len, name, sizeof(name));
392 value_type = get_le16(pb);
393 value_len = get_le16(pb);
394 if (value_type <= 1) // unicode or byte
396 if (!strcmp(name,"WM/AlbumTitle")) get_str16_nolen(pb, value_len, s->album, sizeof(s->album));
397 else if(!strcmp(name,"WM/Genre" )) get_str16_nolen(pb, value_len, s->genre, sizeof(s->genre));
398 else if(!strcmp(name,"WM/Year" )) {
400 get_str16_nolen(pb, value_len, year, sizeof(year));
401 s->year = atoi(year);
403 else if(!strcmp(name,"WM/Track") && s->track == 0) {
405 get_str16_nolen(pb, value_len, track, sizeof(track));
406 s->track = strtol(track, NULL, 10) + 1;
408 else if(!strcmp(name,"WM/TrackNumber")) {
410 get_str16_nolen(pb, value_len, track, sizeof(track));
411 s->track = strtol(track, NULL, 10);
413 else url_fskip(pb, value_len);
415 else if (value_type <= 5) // boolean or DWORD or QWORD or WORD
417 value_num= get_value(pb, value_type);
418 if (!strcmp(name,"WM/Track" ) && s->track == 0) s->track = value_num + 1;
419 if (!strcmp(name,"WM/TrackNumber")) s->track = value_num;
421 url_fskip(pb, value_len);
423 } else if (!memcmp(&g, &metadata_header, sizeof(GUID))) {
424 int n, stream_num, name_len, value_len, value_type, value_num;
430 get_le16(pb); //lang_list_index
431 stream_num= get_le16(pb);
432 name_len= get_le16(pb);
433 value_type= get_le16(pb);
434 value_len= get_le32(pb);
436 get_str16_nolen(pb, name_len, name, sizeof(name));
437 //av_log(NULL, AV_LOG_ERROR, "%d %d %d %d %d <%s>\n", i, stream_num, name_len, value_type, value_len, name);
438 value_num= get_le16(pb);//we should use get_value() here but it does not work 2 is le16 here but le32 elsewhere
439 url_fskip(pb, value_len - 2);
442 if (!strcmp(name, "AspectRatioX")) dar[stream_num].num= value_num;
443 else if(!strcmp(name, "AspectRatioY")) dar[stream_num].den= value_num;
446 } else if (!memcmp(&g, &ext_stream_header, sizeof(GUID))) {
447 int ext_len, payload_ext_ct, stream_ct;
448 uint32_t ext_d, leak_rate, stream_num;
450 pos_ex_st = url_ftell(pb);
452 get_le64(pb); // starttime
453 get_le64(pb); // endtime
454 leak_rate = get_le32(pb); // leak-datarate
455 get_le32(pb); // bucket-datasize
456 get_le32(pb); // init-bucket-fullness
457 get_le32(pb); // alt-leak-datarate
458 get_le32(pb); // alt-bucket-datasize
459 get_le32(pb); // alt-init-bucket-fullness
460 get_le32(pb); // max-object-size
461 get_le32(pb); // flags (reliable,seekable,no_cleanpoints?,resend-live-cleanpoints, rest of bits reserved)
462 stream_num = get_le16(pb); // stream-num
463 get_le16(pb); // stream-language-id-index
464 get_le64(pb); // avg frametime in 100ns units
465 stream_ct = get_le16(pb); //stream-name-count
466 payload_ext_ct = get_le16(pb); //payload-extension-system-count
468 if (stream_num < 128)
469 bitrate[stream_num] = leak_rate;
471 for (i=0; i<stream_ct; i++){
473 ext_len = get_le16(pb);
474 url_fseek(pb, ext_len, SEEK_CUR);
477 for (i=0; i<payload_ext_ct; i++){
480 ext_len=get_le32(pb);
481 url_fseek(pb, ext_len, SEEK_CUR);
484 // there could be a optional stream properties object to follow
485 // if so the next iteration will pick it up
486 } else if (!memcmp(&g, &head1_guid, sizeof(GUID))) {
492 } else if (!memcmp(&g, &codec_comment_header, sizeof(GUID))) {
502 num = get_le16(pb); /* stream number */
503 get_str16(pb, str, sizeof(str));
504 get_str16(pb, str, sizeof(str));
509 if ((q - tag) < sizeof(tag) - 1)
516 } else if (url_feof(pb)) {
519 url_fseek(pb, gsize - 24, SEEK_CUR);
528 asf->data_offset = url_ftell(pb);
529 asf->packet_size_left = 0;
532 for(i=0; i<128; i++){
533 int stream_num= asf->asfid2avid[i];
535 AVStream *st = s->streams[stream_num];
536 if (!st->codec->bit_rate)
537 st->codec->bit_rate = bitrate[i];
538 if (dar[i].num > 0 && dar[i].den > 0)
539 av_reduce(&st->sample_aspect_ratio.num,
540 &st->sample_aspect_ratio.den,
541 dar[i].num, dar[i].den, INT_MAX);
542 //av_log(NULL, AV_LOG_ERROR, "dar %d:%d sar=%d:%d\n", dar[i].num, dar[i].den, st->sample_aspect_ratio.num, st->sample_aspect_ratio.den);
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; \
558 int ff_asf_get_packet(AVFormatContext *s, ByteIOContext *pb)
560 ASFContext *asf = s->priv_data;
561 uint32_t packet_length, padsize;
565 off= (url_ftell(pb) - s->data_offset) % asf->packet_size + 3;
571 if(c == 0x82 && !d && !e)
577 av_log(s, AV_LOG_ERROR, "ff asf bad header %x at:%"PRId64"\n", c, url_ftell(pb));
579 if ((c & 0x8f) == 0x82) {
582 av_log(s, AV_LOG_ERROR, "ff asf bad non zero\n");
589 url_fseek(pb, -1, SEEK_CUR); //FIXME
592 asf->packet_flags = c;
593 asf->packet_property = d;
595 DO_2BITS(asf->packet_flags >> 5, packet_length, asf->packet_size);
596 DO_2BITS(asf->packet_flags >> 1, padsize, 0); // sequence ignored
597 DO_2BITS(asf->packet_flags >> 3, padsize, 0); // padding length
599 //the following checks prevent overflows and infinite loops
600 if(packet_length >= (1U<<29)){
601 av_log(s, AV_LOG_ERROR, "invalid packet_length %d at:%"PRId64"\n", packet_length, url_ftell(pb));
604 if(padsize >= packet_length){
605 av_log(s, AV_LOG_ERROR, "invalid padsize %d at:%"PRId64"\n", padsize, url_ftell(pb));
609 asf->packet_timestamp = get_le32(pb);
610 get_le16(pb); /* duration */
611 // rsize has at least 11 bytes which have to be present
613 if (asf->packet_flags & 0x01) {
614 asf->packet_segsizetype = get_byte(pb); rsize++;
615 asf->packet_segments = asf->packet_segsizetype & 0x3f;
617 asf->packet_segments = 1;
618 asf->packet_segsizetype = 0x80;
620 asf->packet_size_left = packet_length - padsize - rsize;
621 if (packet_length < asf->hdr.min_pktsize)
622 padsize += asf->hdr.min_pktsize - packet_length;
623 asf->packet_padsize = padsize;
624 dprintf(s, "packet: size=%d padsize=%d left=%d\n", asf->packet_size, asf->packet_padsize, asf->packet_size_left);
630 * @return <0 if error
632 static int asf_read_frame_header(AVFormatContext *s, ByteIOContext *pb){
633 ASFContext *asf = s->priv_data;
635 int num = get_byte(pb);
638 asf->packet_segments--;
639 asf->packet_key_frame = num >> 7;
640 asf->stream_index = asf->asfid2avid[num & 0x7f];
641 // sequence should be ignored!
642 DO_2BITS(asf->packet_property >> 4, asf->packet_seq, 0);
643 DO_2BITS(asf->packet_property >> 2, asf->packet_frag_offset, 0);
644 DO_2BITS(asf->packet_property, asf->packet_replic_size, 0);
645 //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);
646 if (asf->packet_replic_size >= 8) {
647 asf->packet_obj_size = get_le32(pb);
648 if(asf->packet_obj_size >= (1<<24) || asf->packet_obj_size <= 0){
649 av_log(s, AV_LOG_ERROR, "packet_obj_size invalid\n");
652 asf->packet_frag_timestamp = get_le32(pb); // timestamp
653 if(asf->packet_replic_size >= 8+38+4){
654 // for(i=0; i<asf->packet_replic_size-8; i++)
655 // av_log(s, AV_LOG_DEBUG, "%02X ",get_byte(pb));
656 // av_log(s, AV_LOG_DEBUG, "\n");
662 url_fskip(pb, asf->packet_replic_size - 8 - 38 - 4);
663 if(ts0!= -1) asf->packet_frag_timestamp= ts0/10000;
664 else asf->packet_frag_timestamp= AV_NOPTS_VALUE;
666 url_fskip(pb, asf->packet_replic_size - 8);
667 rsize += asf->packet_replic_size; // FIXME - check validity
668 } else if (asf->packet_replic_size==1){
669 // multipacket - frag_offset is beginning timestamp
670 asf->packet_time_start = asf->packet_frag_offset;
671 asf->packet_frag_offset = 0;
672 asf->packet_frag_timestamp = asf->packet_timestamp;
674 asf->packet_time_delta = get_byte(pb);
676 }else if(asf->packet_replic_size!=0){
677 av_log(s, AV_LOG_ERROR, "unexpected packet_replic_size of %d\n", asf->packet_replic_size);
680 if (asf->packet_flags & 0x01) {
681 DO_2BITS(asf->packet_segsizetype >> 6, asf->packet_frag_size, 0); // 0 is illegal
682 if(asf->packet_frag_size > asf->packet_size_left - rsize){
683 av_log(s, AV_LOG_ERROR, "packet_frag_size is invalid\n");
686 //printf("Fragsize %d\n", asf->packet_frag_size);
688 asf->packet_frag_size = asf->packet_size_left - rsize;
689 //printf("Using rest %d %d %d\n", asf->packet_frag_size, asf->packet_size_left, rsize);
691 if (asf->packet_replic_size == 1) {
692 asf->packet_multi_size = asf->packet_frag_size;
693 if (asf->packet_multi_size > asf->packet_size_left)
696 asf->packet_size_left -= rsize;
697 //printf("___objsize____ %d %d rs:%d\n", asf->packet_obj_size, asf->packet_frag_offset, rsize);
702 int ff_asf_parse_packet(AVFormatContext *s, ByteIOContext *pb, AVPacket *pkt)
704 ASFContext *asf = s->priv_data;
705 ASFStream *asf_st = 0;
709 if (asf->packet_size_left < FRAME_HEADER_SIZE
710 || asf->packet_segments < 1) {
711 //asf->packet_size_left <= asf->packet_padsize) {
712 int ret = asf->packet_size_left + asf->packet_padsize;
713 //printf("PacketLeftSize:%d Pad:%d Pos:%"PRId64"\n", asf->packet_size_left, asf->packet_padsize, url_ftell(pb));
718 asf->packet_pos= url_ftell(pb);
719 if (asf->data_object_size != (uint64_t)-1 &&
720 (asf->packet_pos - asf->data_object_offset >= asf->data_object_size))
721 return AVERROR(EIO); /* Do not exceed the size of the data object */
724 if (asf->packet_time_start == 0) {
725 if(asf_read_frame_header(s, pb) < 0){
726 asf->packet_segments= 0;
729 if (asf->stream_index < 0
730 || s->streams[asf->stream_index]->discard >= AVDISCARD_ALL
731 || (!asf->packet_key_frame && s->streams[asf->stream_index]->discard >= AVDISCARD_NONKEY)
733 asf->packet_time_start = 0;
734 /* unhandled packet (should not happen) */
735 url_fskip(pb, asf->packet_frag_size);
736 asf->packet_size_left -= asf->packet_frag_size;
737 if(asf->stream_index < 0)
738 av_log(s, AV_LOG_ERROR, "ff asf skip %d (unknown stream)\n", asf->packet_frag_size);
741 asf->asf_st = s->streams[asf->stream_index]->priv_data;
743 asf_st = asf->asf_st;
745 if (asf->packet_replic_size == 1) {
746 // frag_offset is here used as the beginning timestamp
747 asf->packet_frag_timestamp = asf->packet_time_start;
748 asf->packet_time_start += asf->packet_time_delta;
749 asf->packet_obj_size = asf->packet_frag_size = get_byte(pb);
750 asf->packet_size_left--;
751 asf->packet_multi_size--;
752 if (asf->packet_multi_size < asf->packet_obj_size)
754 asf->packet_time_start = 0;
755 url_fskip(pb, asf->packet_multi_size);
756 asf->packet_size_left -= asf->packet_multi_size;
759 asf->packet_multi_size -= asf->packet_obj_size;
760 //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);
762 if( /*asf->packet_frag_size == asf->packet_obj_size*/
763 asf_st->frag_offset + asf->packet_frag_size <= asf_st->pkt.size
764 && asf_st->frag_offset + asf->packet_frag_size > asf->packet_obj_size){
765 av_log(s, AV_LOG_INFO, "ignoring invalid packet_obj_size (%d %d %d %d)\n",
766 asf_st->frag_offset, asf->packet_frag_size,
767 asf->packet_obj_size, asf_st->pkt.size);
768 asf->packet_obj_size= asf_st->pkt.size;
771 if ( asf_st->pkt.size != asf->packet_obj_size
772 || asf_st->frag_offset + asf->packet_frag_size > asf_st->pkt.size) { //FIXME is this condition sufficient?
773 if(asf_st->pkt.data){
774 av_log(s, AV_LOG_INFO, "freeing incomplete packet size %d, new %d\n", asf_st->pkt.size, asf->packet_obj_size);
775 asf_st->frag_offset = 0;
776 av_free_packet(&asf_st->pkt);
779 av_new_packet(&asf_st->pkt, asf->packet_obj_size);
780 asf_st->seq = asf->packet_seq;
781 asf_st->pkt.dts = asf->packet_frag_timestamp;
782 asf_st->pkt.stream_index = asf->stream_index;
784 asf_st->packet_pos= asf->packet_pos;
785 //printf("new packet: stream:%d key:%d packet_key:%d audio:%d size:%d\n",
786 //asf->stream_index, asf->packet_key_frame, asf_st->pkt.flags & PKT_FLAG_KEY,
787 //s->streams[asf->stream_index]->codec->codec_type == CODEC_TYPE_AUDIO, asf->packet_obj_size);
788 if (s->streams[asf->stream_index]->codec->codec_type == CODEC_TYPE_AUDIO)
789 asf->packet_key_frame = 1;
790 if (asf->packet_key_frame)
791 asf_st->pkt.flags |= PKT_FLAG_KEY;
795 //printf("READ PACKET s:%d os:%d o:%d,%d l:%d DATA:%p\n",
796 // asf->packet_size, asf_st->pkt.size, asf->packet_frag_offset,
797 // asf_st->frag_offset, asf->packet_frag_size, asf_st->pkt.data);
798 asf->packet_size_left -= asf->packet_frag_size;
799 if (asf->packet_size_left < 0)
802 if( asf->packet_frag_offset >= asf_st->pkt.size
803 || asf->packet_frag_size > asf_st->pkt.size - asf->packet_frag_offset){
804 av_log(s, AV_LOG_ERROR, "packet fragment position invalid %u,%u not in %u\n",
805 asf->packet_frag_offset, asf->packet_frag_size, asf_st->pkt.size);
809 get_buffer(pb, asf_st->pkt.data + asf->packet_frag_offset,
810 asf->packet_frag_size);
811 if (s->key && s->keylen == 20)
812 ff_asfcrypt_dec(s->key, asf_st->pkt.data + asf->packet_frag_offset,
813 asf->packet_frag_size);
814 asf_st->frag_offset += asf->packet_frag_size;
815 /* test if whole packet is read */
816 if (asf_st->frag_offset == asf_st->pkt.size) {
817 //workaround for macroshit radio DVR-MS files
818 if( s->streams[asf->stream_index]->codec->codec_id == CODEC_ID_MPEG2VIDEO
819 && asf_st->pkt.size > 100){
821 for(i=0; i<asf_st->pkt.size && !asf_st->pkt.data[i]; i++);
822 if(i == asf_st->pkt.size){
823 av_log(s, AV_LOG_DEBUG, "discarding ms fart\n");
824 asf_st->frag_offset = 0;
825 av_free_packet(&asf_st->pkt);
831 if (asf_st->ds_span > 1) {
832 if(asf_st->pkt.size != asf_st->ds_packet_size * asf_st->ds_span){
833 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);
835 /* packet descrambling */
836 uint8_t *newdata = av_malloc(asf_st->pkt.size);
839 while (offset < asf_st->pkt.size) {
840 int off = offset / asf_st->ds_chunk_size;
841 int row = off / asf_st->ds_span;
842 int col = off % asf_st->ds_span;
843 int idx = row + col * asf_st->ds_packet_size / asf_st->ds_chunk_size;
844 //printf("off:%d row:%d col:%d idx:%d\n", off, row, col, idx);
846 assert(offset + asf_st->ds_chunk_size <= asf_st->pkt.size);
847 assert(idx+1 <= asf_st->pkt.size / asf_st->ds_chunk_size);
848 memcpy(newdata + offset,
849 asf_st->pkt.data + idx * asf_st->ds_chunk_size,
850 asf_st->ds_chunk_size);
851 offset += asf_st->ds_chunk_size;
853 av_free(asf_st->pkt.data);
854 asf_st->pkt.data = newdata;
858 asf_st->frag_offset = 0;
860 //printf("packet %d %d\n", asf_st->pkt.size, asf->packet_frag_size);
861 asf_st->pkt.size = 0;
862 asf_st->pkt.data = 0;
863 break; // packet completed
869 static int asf_read_packet(AVFormatContext *s, AVPacket *pkt)
871 ASFContext *asf = s->priv_data;
876 /* parse cached packets, if any */
877 if ((ret = ff_asf_parse_packet(s, s->pb, pkt)) <= 0)
879 if ((ret = ff_asf_get_packet(s, s->pb)) < 0)
880 assert(asf->packet_size_left < FRAME_HEADER_SIZE || asf->packet_segments < 1);
881 asf->packet_time_start = 0;
887 // Added to support seeking after packets have been read
888 // If information is not reset, read_packet fails due to
889 // leftover information from previous reads
890 static void asf_reset_header(AVFormatContext *s)
892 ASFContext *asf = s->priv_data;
896 asf->packet_nb_frames = 0;
897 asf->packet_size_left = 0;
898 asf->packet_segments = 0;
899 asf->packet_flags = 0;
900 asf->packet_property = 0;
901 asf->packet_timestamp = 0;
902 asf->packet_segsizetype = 0;
903 asf->packet_segments = 0;
905 asf->packet_replic_size = 0;
906 asf->packet_key_frame = 0;
907 asf->packet_padsize = 0;
908 asf->packet_frag_offset = 0;
909 asf->packet_frag_size = 0;
910 asf->packet_frag_timestamp = 0;
911 asf->packet_multi_size = 0;
912 asf->packet_obj_size = 0;
913 asf->packet_time_delta = 0;
914 asf->packet_time_start = 0;
916 for(i=0; i<s->nb_streams; i++){
917 asf_st= s->streams[i]->priv_data;
918 av_free_packet(&asf_st->pkt);
919 asf_st->frag_offset=0;
925 static int asf_read_close(AVFormatContext *s)
930 for(i=0;i<s->nb_streams;i++) {
931 AVStream *st = s->streams[i];
932 av_free(st->codec->palctrl);
937 static int64_t asf_read_pts(AVFormatContext *s, int stream_index, int64_t *ppos, int64_t pos_limit)
939 ASFContext *asf = s->priv_data;
940 AVPacket pkt1, *pkt = &pkt1;
945 int64_t start_pos[s->nb_streams];
947 for(i=0; i<s->nb_streams; i++){
951 pos= (pos+asf->packet_size-1-s->data_offset)/asf->packet_size*asf->packet_size+ s->data_offset;
953 url_fseek(s->pb, pos, SEEK_SET);
955 //printf("asf_read_pts\n");
958 if (av_read_frame(s, pkt) < 0){
959 av_log(s, AV_LOG_INFO, "asf_read_pts failed\n");
960 return AV_NOPTS_VALUE;
966 if(pkt->flags&PKT_FLAG_KEY){
967 i= pkt->stream_index;
969 asf_st= s->streams[i]->priv_data;
971 // assert((asf_st->packet_pos - s->data_offset) % asf->packet_size == 0);
972 pos= asf_st->packet_pos;
974 av_add_index_entry(s->streams[i], pos, pts, pkt->size, pos - start_pos[i] + 1, AVINDEX_KEYFRAME);
975 start_pos[i]= asf_st->packet_pos + 1;
977 if(pkt->stream_index == stream_index)
983 //printf("found keyframe at %"PRId64" stream %d stamp:%"PRId64"\n", *ppos, stream_index, pts);
988 static void asf_build_simple_index(AVFormatContext *s, int stream_index)
991 ASFContext *asf = s->priv_data;
992 int64_t gsize, itime;
993 int64_t pos, current_pos, index_pts;
997 current_pos = url_ftell(s->pb);
999 url_fseek(s->pb, asf->data_object_offset + asf->data_object_size, SEEK_SET);
1000 get_guid(s->pb, &g);
1001 if (!memcmp(&g, &index_guid, sizeof(GUID))) {
1002 gsize = get_le64(s->pb);
1003 get_guid(s->pb, &g);
1004 itime=get_le64(s->pb);
1005 pct=get_le32(s->pb);
1006 ict=get_le32(s->pb);
1007 av_log(NULL, AV_LOG_DEBUG, "itime:0x%"PRIx64", pct:%d, ict:%d\n",itime,pct,ict);
1009 for (i=0;i<ict;i++){
1010 int pktnum=get_le32(s->pb);
1011 int pktct =get_le16(s->pb);
1012 av_log(NULL, AV_LOG_DEBUG, "pktnum:%d, pktct:%d\n", pktnum, pktct);
1014 pos=s->data_offset + asf->packet_size*(int64_t)pktnum;
1015 index_pts=av_rescale(itime, i, 10000);
1017 av_add_index_entry(s->streams[stream_index], pos, index_pts, asf->packet_size, 0, AVINDEX_KEYFRAME);
1021 url_fseek(s->pb, current_pos, SEEK_SET);
1024 static int asf_read_seek(AVFormatContext *s, int stream_index, int64_t pts, int flags)
1026 ASFContext *asf = s->priv_data;
1027 AVStream *st = s->streams[stream_index];
1031 if (asf->packet_size <= 0)
1034 /* Try using the protocol's read_seek if available */
1036 int ret = av_url_read_fseek(s->pb, stream_index, pts, flags);
1038 asf_reset_header(s);
1039 if (ret != AVERROR(ENOSYS))
1043 if (!asf->index_read)
1044 asf_build_simple_index(s, stream_index);
1046 if(!(asf->index_read && st->index_entries)){
1047 if(av_seek_frame_binary(s, stream_index, pts, flags)<0)
1050 index= av_index_search_timestamp(st, pts, flags);
1054 /* find the position */
1055 pos = st->index_entries[index].pos;
1056 pts = st->index_entries[index].timestamp;
1058 // various attempts to find key frame have failed so far
1059 // asf_reset_header(s);
1060 // url_fseek(s->pb, pos, SEEK_SET);
1062 // for(i=0;i<16;i++){
1063 // pos = url_ftell(s->pb);
1064 // if (av_read_frame(s, &pkt) < 0){
1065 // av_log(s, AV_LOG_INFO, "seek failed\n");
1068 // asf_st = s->streams[stream_index]->priv_data;
1069 // pos += st->parser->frame_offset;
1071 // if (pkt.size > b) {
1076 // av_free_packet(&pkt);
1080 av_log(NULL, AV_LOG_DEBUG, "SEEKTO: %"PRId64"\n", pos);
1081 url_fseek(s->pb, pos, SEEK_SET);
1083 asf_reset_header(s);
1087 AVInputFormat asf_demuxer = {
1089 NULL_IF_CONFIG_SMALL("ASF format"),