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
24 #include "libavutil/bswap.h"
25 #include "libavutil/common.h"
26 #include "libavutil/avstring.h"
27 #include "libavutil/dict.h"
28 #include "libavutil/mathematics.h"
29 #include "libavutil/opt.h"
32 #include "avio_internal.h"
37 #include "avlanguage.h"
41 int asfid2avid[128]; ///< conversion table from asf ID 2 AVStream ID
42 ASFStream streams[128]; ///< it's max number and it's not that big
43 uint32_t stream_bitrates[128]; ///< max number of streams, bitrate for each (for streaming)
45 char stream_languages[128][6]; ///< max number of streams, language for each (RFC1766, e.g. en-US)
46 /* non streamed additonnal info */
49 /* only for reading */
50 uint64_t data_offset; ///< beginning of the first data packet
51 uint64_t data_object_offset; ///< data object offset (excl. GUID & size)
52 uint64_t data_object_size; ///< size of the data object
60 int packet_segsizetype;
63 int packet_replic_size;
66 unsigned int packet_frag_offset;
67 unsigned int packet_frag_size;
68 int64_t packet_frag_timestamp;
69 int packet_multi_size;
71 int packet_time_delta;
72 int packet_time_start;
77 ASFStream* asf_st; ///< currently decoded stream
82 static const AVOption options[] = {
83 {"no_resync_search", "Don't try to resynchronize by looking for a certain optional start code", offsetof(ASFContext, no_resync_search), AV_OPT_TYPE_INT, {.i64 = 0}, 0, 1, AV_OPT_FLAG_DECODING_PARAM },
87 static const AVClass asf_class = {
88 .class_name = "asf demuxer",
89 .item_name = av_default_item_name,
91 .version = LIBAVUTIL_VERSION_INT,
97 #define ASF_MAX_STREAMS 127
98 #define FRAME_HEADER_SIZE 16
99 // Fix Me! FRAME_HEADER_SIZE may be different. (17 is known to be too large)
102 static const ff_asf_guid stream_bitrate_guid = { /* (http://get.to/sdp) */
103 0xce, 0x75, 0xf8, 0x7b, 0x8d, 0x46, 0xd1, 0x11, 0x8d, 0x82, 0x00, 0x60, 0x97, 0xc9, 0xa2, 0xb2
106 #define PRINT_IF_GUID(g,cmp) \
107 if (!ff_guidcmp(g, &cmp)) \
108 av_dlog(NULL, "(GUID: %s) ", #cmp)
110 static void print_guid(const ff_asf_guid *g)
113 PRINT_IF_GUID(g, ff_asf_header);
114 else PRINT_IF_GUID(g, ff_asf_file_header);
115 else PRINT_IF_GUID(g, ff_asf_stream_header);
116 else PRINT_IF_GUID(g, ff_asf_audio_stream);
117 else PRINT_IF_GUID(g, ff_asf_audio_conceal_none);
118 else PRINT_IF_GUID(g, ff_asf_video_stream);
119 else PRINT_IF_GUID(g, ff_asf_video_conceal_none);
120 else PRINT_IF_GUID(g, ff_asf_command_stream);
121 else PRINT_IF_GUID(g, ff_asf_comment_header);
122 else PRINT_IF_GUID(g, ff_asf_codec_comment_header);
123 else PRINT_IF_GUID(g, ff_asf_codec_comment1_header);
124 else PRINT_IF_GUID(g, ff_asf_data_header);
125 else PRINT_IF_GUID(g, ff_asf_simple_index_header);
126 else PRINT_IF_GUID(g, ff_asf_head1_guid);
127 else PRINT_IF_GUID(g, ff_asf_head2_guid);
128 else PRINT_IF_GUID(g, ff_asf_my_guid);
129 else PRINT_IF_GUID(g, ff_asf_ext_stream_header);
130 else PRINT_IF_GUID(g, ff_asf_extended_content_header);
131 else PRINT_IF_GUID(g, ff_asf_ext_stream_embed_stream_header);
132 else PRINT_IF_GUID(g, ff_asf_ext_stream_audio_stream);
133 else PRINT_IF_GUID(g, ff_asf_metadata_header);
134 else PRINT_IF_GUID(g, ff_asf_marker_header);
135 else PRINT_IF_GUID(g, stream_bitrate_guid);
136 else PRINT_IF_GUID(g, ff_asf_language_guid);
138 av_dlog(NULL, "(GUID: unknown) ");
140 av_dlog(NULL, " 0x%02x,", (*g)[i]);
141 av_dlog(NULL, "}\n");
145 #define print_guid(g)
148 static int asf_probe(AVProbeData *pd)
150 /* check file header */
151 if (!ff_guidcmp(pd->buf, &ff_asf_header))
152 return AVPROBE_SCORE_MAX;
157 static int get_value(AVIOContext *pb, int type){
159 case 2: return avio_rl32(pb);
160 case 3: return avio_rl32(pb);
161 case 4: return avio_rl64(pb);
162 case 5: return avio_rl16(pb);
163 default:return INT_MIN;
167 /* MSDN claims that this should be "compatible with the ID3 frame, APIC",
168 * but in reality this is only loosely similar */
169 static int asf_read_picture(AVFormatContext *s, int len)
171 AVPacket pkt = { 0 };
172 const CodecMime *mime = ff_id3v2_mime_tags;
173 enum AVCodecID id = AV_CODEC_ID_NONE;
175 uint8_t *desc = NULL;
176 ASFStream *ast = NULL;
178 int ret, type, picsize, desc_len;
180 /* type + picsize + mime + desc */
181 if (len < 1 + 4 + 2 + 2) {
182 av_log(s, AV_LOG_ERROR, "Invalid attached picture size: %d.\n", len);
183 return AVERROR_INVALIDDATA;
187 type = avio_r8(s->pb);
189 if (type >= FF_ARRAY_ELEMS(ff_id3v2_picture_types) || type < 0) {
190 av_log(s, AV_LOG_WARNING, "Unknown attached picture type: %d.\n", type);
194 /* picture data size */
195 picsize = avio_rl32(s->pb);
198 /* picture MIME type */
199 len -= avio_get_str16le(s->pb, len, mimetype, sizeof(mimetype));
200 while (mime->id != AV_CODEC_ID_NONE) {
201 if (!strncmp(mime->str, mimetype, sizeof(mimetype))) {
207 if (id == AV_CODEC_ID_NONE) {
208 av_log(s, AV_LOG_ERROR, "Unknown attached picture mimetype: %s.\n",
213 if (picsize >= len) {
214 av_log(s, AV_LOG_ERROR, "Invalid attached picture data size: %d >= %d.\n",
216 return AVERROR_INVALIDDATA;
219 /* picture description */
220 desc_len = (len - picsize) * 2 + 1;
221 desc = av_malloc(desc_len);
223 return AVERROR(ENOMEM);
224 len -= avio_get_str16le(s->pb, len - picsize, desc, desc_len);
226 ret = av_get_packet(s->pb, &pkt, picsize);
230 st = avformat_new_stream(s, NULL);
231 ast = av_mallocz(sizeof(*ast));
233 ret = AVERROR(ENOMEM);
238 st->disposition |= AV_DISPOSITION_ATTACHED_PIC;
239 st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
240 st->codec->codec_id = id;
242 st->attached_pic = pkt;
243 st->attached_pic.stream_index = st->index;
244 st->attached_pic.flags |= AV_PKT_FLAG_KEY;
247 av_dict_set(&st->metadata, "title", desc, AV_DICT_DONT_STRDUP_VAL);
251 av_dict_set(&st->metadata, "comment", ff_id3v2_picture_types[type], 0);
258 av_free_packet(&pkt);
262 static void get_tag(AVFormatContext *s, const char *key, int type, int len)
265 int64_t off = avio_tell(s->pb);
267 if ((unsigned)len >= (UINT_MAX - 1)/2)
270 value = av_malloc(2*len+1);
274 if (type == 0) { // UTF16-LE
275 avio_get_str16le(s->pb, len, value, 2*len + 1);
276 } else if (type == -1) { // ASCII
277 avio_read(s->pb, value, len);
279 } else if (type > 1 && type <= 5) { // boolean or DWORD or QWORD or WORD
280 uint64_t num = get_value(s->pb, type);
281 snprintf(value, len, "%"PRIu64, num);
282 } else if (type == 1 && !strcmp(key, "WM/Picture")) { // handle cover art
283 asf_read_picture(s, len);
286 av_log(s, AV_LOG_DEBUG, "Unsupported value type %d in tag %s.\n", type, key);
290 av_dict_set(&s->metadata, key, value, 0);
293 avio_seek(s->pb, off + len, SEEK_SET);
296 static int asf_read_file_properties(AVFormatContext *s, int64_t size)
298 ASFContext *asf = s->priv_data;
299 AVIOContext *pb = s->pb;
301 ff_get_guid(pb, &asf->hdr.guid);
302 asf->hdr.file_size = avio_rl64(pb);
303 asf->hdr.create_time = avio_rl64(pb);
304 avio_rl64(pb); /* number of packets */
305 asf->hdr.play_time = avio_rl64(pb);
306 asf->hdr.send_time = avio_rl64(pb);
307 asf->hdr.preroll = avio_rl32(pb);
308 asf->hdr.ignore = avio_rl32(pb);
309 asf->hdr.flags = avio_rl32(pb);
310 asf->hdr.min_pktsize = avio_rl32(pb);
311 asf->hdr.max_pktsize = avio_rl32(pb);
312 if (asf->hdr.min_pktsize >= (1U<<29))
313 return AVERROR_INVALIDDATA;
314 asf->hdr.max_bitrate = avio_rl32(pb);
315 s->packet_size = asf->hdr.max_pktsize;
320 static int asf_read_stream_properties(AVFormatContext *s, int64_t size)
322 ASFContext *asf = s->priv_data;
323 AVIOContext *pb = s->pb;
327 enum AVMediaType type;
328 int type_specific_size, sizeX;
330 int64_t pos1, pos2, start_time;
331 int test_for_ext_stream_audio, is_dvr_ms_audio=0;
333 if (s->nb_streams == ASF_MAX_STREAMS) {
334 av_log(s, AV_LOG_ERROR, "too many streams\n");
335 return AVERROR(EINVAL);
338 pos1 = avio_tell(pb);
340 st = avformat_new_stream(s, NULL);
342 return AVERROR(ENOMEM);
343 avpriv_set_pts_info(st, 32, 1, 1000); /* 32 bit pts in ms */
344 asf_st = av_mallocz(sizeof(ASFStream));
346 return AVERROR(ENOMEM);
347 st->priv_data = asf_st;
348 start_time = asf->hdr.preroll;
350 asf_st->stream_language_index = 128; // invalid stream index means no language info
352 if(!(asf->hdr.flags & 0x01)) { // if we aren't streaming...
353 st->duration = asf->hdr.play_time /
354 (10000000 / 1000) - start_time;
358 test_for_ext_stream_audio = 0;
359 if (!ff_guidcmp(&g, &ff_asf_audio_stream)) {
360 type = AVMEDIA_TYPE_AUDIO;
361 } else if (!ff_guidcmp(&g, &ff_asf_video_stream)) {
362 type = AVMEDIA_TYPE_VIDEO;
363 } else if (!ff_guidcmp(&g, &ff_asf_jfif_media)) {
364 type = AVMEDIA_TYPE_VIDEO;
365 st->codec->codec_id = AV_CODEC_ID_MJPEG;
366 } else if (!ff_guidcmp(&g, &ff_asf_command_stream)) {
367 type = AVMEDIA_TYPE_DATA;
368 } else if (!ff_guidcmp(&g, &ff_asf_ext_stream_embed_stream_header)) {
369 test_for_ext_stream_audio = 1;
370 type = AVMEDIA_TYPE_UNKNOWN;
375 avio_skip(pb, 8); /* total_size */
376 type_specific_size = avio_rl32(pb);
378 st->id = avio_rl16(pb) & 0x7f; /* stream id */
379 // mapping of asf ID to AV stream ID;
380 asf->asfid2avid[st->id] = s->nb_streams - 1;
384 if (test_for_ext_stream_audio) {
386 if (!ff_guidcmp(&g, &ff_asf_ext_stream_audio_stream)) {
387 type = AVMEDIA_TYPE_AUDIO;
398 st->codec->codec_type = type;
399 if (type == AVMEDIA_TYPE_AUDIO) {
400 int ret = ff_get_wav_header(pb, st->codec, type_specific_size);
403 if (is_dvr_ms_audio) {
404 // codec_id and codec_tag are unreliable in dvr_ms
405 // files. Set them later by probing stream.
406 st->request_probe= 1;
407 st->codec->codec_tag = 0;
409 if (st->codec->codec_id == AV_CODEC_ID_AAC) {
410 st->need_parsing = AVSTREAM_PARSE_NONE;
412 st->need_parsing = AVSTREAM_PARSE_FULL;
414 /* We have to init the frame size at some point .... */
415 pos2 = avio_tell(pb);
416 if (size >= (pos2 + 8 - pos1 + 24)) {
417 asf_st->ds_span = avio_r8(pb);
418 asf_st->ds_packet_size = avio_rl16(pb);
419 asf_st->ds_chunk_size = avio_rl16(pb);
420 avio_rl16(pb); //ds_data_size
421 avio_r8(pb); //ds_silence_data
423 //printf("Descrambling: ps:%d cs:%d ds:%d s:%d sd:%d\n",
424 // asf_st->ds_packet_size, asf_st->ds_chunk_size,
425 // asf_st->ds_data_size, asf_st->ds_span, asf_st->ds_silence_data);
426 if (asf_st->ds_span > 1) {
427 if (!asf_st->ds_chunk_size
428 || (asf_st->ds_packet_size/asf_st->ds_chunk_size <= 1)
429 || asf_st->ds_packet_size % asf_st->ds_chunk_size)
430 asf_st->ds_span = 0; // disable descrambling
432 } else if (type == AVMEDIA_TYPE_VIDEO &&
433 size - (avio_tell(pb) - pos1 + 24) >= 51) {
437 avio_rl16(pb); /* size */
438 sizeX= avio_rl32(pb); /* size */
439 st->codec->width = avio_rl32(pb);
440 st->codec->height = avio_rl32(pb);
441 /* not available for asf */
442 avio_rl16(pb); /* panes */
443 st->codec->bits_per_coded_sample = avio_rl16(pb); /* depth */
444 tag1 = avio_rl32(pb);
446 // av_log(s, AV_LOG_DEBUG, "size:%d tsize:%d sizeX:%d\n", size, total_size, sizeX);
448 st->codec->extradata_size = sizeX - 40;
449 st->codec->extradata = av_mallocz(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
450 avio_read(pb, st->codec->extradata, st->codec->extradata_size);
453 /* Extract palette from extradata if bpp <= 8 */
454 /* This code assumes that extradata contains only palette */
455 /* This is true for all paletted codecs implemented in libavcodec */
456 if (st->codec->extradata_size && (st->codec->bits_per_coded_sample <= 8)) {
459 for (i = 0; i < FFMIN(st->codec->extradata_size, AVPALETTE_SIZE)/4; i++)
460 asf_st->palette[i] = av_bswap32(((uint32_t*)st->codec->extradata)[i]);
462 memcpy(asf_st->palette, st->codec->extradata,
463 FFMIN(st->codec->extradata_size, AVPALETTE_SIZE));
465 asf_st->palette_changed = 1;
468 st->codec->codec_tag = tag1;
469 st->codec->codec_id = ff_codec_get_id(ff_codec_bmp_tags, tag1);
470 if(tag1 == MKTAG('D', 'V', 'R', ' ')){
471 st->need_parsing = AVSTREAM_PARSE_FULL;
472 // issue658 containse wrong w/h and MS even puts a fake seq header with wrong w/h in extradata while a correct one is in te stream. maximum lameness
474 st->codec->height = 0;
475 av_freep(&st->codec->extradata);
476 st->codec->extradata_size=0;
478 if(st->codec->codec_id == AV_CODEC_ID_H264)
479 st->need_parsing = AVSTREAM_PARSE_FULL_ONCE;
481 pos2 = avio_tell(pb);
482 avio_skip(pb, size - (pos2 - pos1 + 24));
487 static int asf_read_ext_stream_properties(AVFormatContext *s, int64_t size)
489 ASFContext *asf = s->priv_data;
490 AVIOContext *pb = s->pb;
492 int ext_len, payload_ext_ct, stream_ct, i;
493 uint32_t leak_rate, stream_num;
494 unsigned int stream_languageid_index;
496 avio_rl64(pb); // starttime
497 avio_rl64(pb); // endtime
498 leak_rate = avio_rl32(pb); // leak-datarate
499 avio_rl32(pb); // bucket-datasize
500 avio_rl32(pb); // init-bucket-fullness
501 avio_rl32(pb); // alt-leak-datarate
502 avio_rl32(pb); // alt-bucket-datasize
503 avio_rl32(pb); // alt-init-bucket-fullness
504 avio_rl32(pb); // max-object-size
505 avio_rl32(pb); // flags (reliable,seekable,no_cleanpoints?,resend-live-cleanpoints, rest of bits reserved)
506 stream_num = avio_rl16(pb); // stream-num
508 stream_languageid_index = avio_rl16(pb); // stream-language-id-index
509 if (stream_num < 128)
510 asf->streams[stream_num].stream_language_index = stream_languageid_index;
512 avio_rl64(pb); // avg frametime in 100ns units
513 stream_ct = avio_rl16(pb); //stream-name-count
514 payload_ext_ct = avio_rl16(pb); //payload-extension-system-count
516 if (stream_num < 128)
517 asf->stream_bitrates[stream_num] = leak_rate;
519 for (i=0; i<stream_ct; i++){
521 ext_len = avio_rl16(pb);
522 avio_skip(pb, ext_len);
525 for (i=0; i<payload_ext_ct; i++){
528 ext_len=avio_rl32(pb);
529 avio_skip(pb, ext_len);
535 static int asf_read_content_desc(AVFormatContext *s, int64_t size)
537 AVIOContext *pb = s->pb;
538 int len1, len2, len3, len4, len5;
540 len1 = avio_rl16(pb);
541 len2 = avio_rl16(pb);
542 len3 = avio_rl16(pb);
543 len4 = avio_rl16(pb);
544 len5 = avio_rl16(pb);
545 get_tag(s, "title" , 0, len1);
546 get_tag(s, "author" , 0, len2);
547 get_tag(s, "copyright", 0, len3);
548 get_tag(s, "comment" , 0, len4);
554 static int asf_read_ext_content_desc(AVFormatContext *s, int64_t size)
556 AVIOContext *pb = s->pb;
557 ASFContext *asf = s->priv_data;
558 int desc_count, i, ret;
560 desc_count = avio_rl16(pb);
561 for(i=0;i<desc_count;i++) {
562 int name_len,value_type,value_len;
565 name_len = avio_rl16(pb);
566 if (name_len%2) // must be even, broken lavf versions wrote len-1
568 if ((ret = avio_get_str16le(pb, name_len, name, sizeof(name))) < name_len)
569 avio_skip(pb, name_len - ret);
570 value_type = avio_rl16(pb);
571 value_len = avio_rl16(pb);
572 if (!value_type && value_len%2)
575 * My sample has that stream set to 0 maybe that mean the container.
576 * Asf stream count start at 1. I am using 0 to the container value since it's unused
578 if (!strcmp(name, "AspectRatioX")){
579 asf->dar[0].num= get_value(s->pb, value_type);
580 } else if(!strcmp(name, "AspectRatioY")){
581 asf->dar[0].den= get_value(s->pb, value_type);
583 get_tag(s, name, value_type, value_len);
589 static int asf_read_language_list(AVFormatContext *s, int64_t size)
591 AVIOContext *pb = s->pb;
592 ASFContext *asf = s->priv_data;
594 int stream_count = avio_rl16(pb);
595 for(j = 0; j < stream_count; j++) {
597 unsigned int lang_len = avio_r8(pb);
598 if ((ret = avio_get_str16le(pb, lang_len, lang, sizeof(lang))) < lang_len)
599 avio_skip(pb, lang_len - ret);
601 av_strlcpy(asf->stream_languages[j], lang, sizeof(*asf->stream_languages));
607 static int asf_read_metadata(AVFormatContext *s, int64_t size)
609 AVIOContext *pb = s->pb;
610 ASFContext *asf = s->priv_data;
611 int n, stream_num, name_len, value_len, value_num;
618 avio_rl16(pb); //lang_list_index
619 stream_num= avio_rl16(pb);
620 name_len= avio_rl16(pb);
621 avio_skip(pb, 2); /* value_type */
622 value_len= avio_rl32(pb);
624 if ((ret = avio_get_str16le(pb, name_len, name, sizeof(name))) < name_len)
625 avio_skip(pb, name_len - ret);
626 //av_log(s, AV_LOG_ERROR, "%d %d %d %d %d <%s>\n", i, stream_num, name_len, value_type, value_len, name);
627 value_num= avio_rl16(pb);//we should use get_value() here but it does not work 2 is le16 here but le32 elsewhere
628 avio_skip(pb, value_len - 2);
631 if (!strcmp(name, "AspectRatioX")) asf->dar[stream_num].num= value_num;
632 else if(!strcmp(name, "AspectRatioY")) asf->dar[stream_num].den= value_num;
639 static int asf_read_marker(AVFormatContext *s, int64_t size)
641 AVIOContext *pb = s->pb;
642 int i, count, name_len, ret;
645 avio_rl64(pb); // reserved 16 bytes
646 avio_rl64(pb); // ...
647 count = avio_rl32(pb); // markers count
648 avio_rl16(pb); // reserved 2 bytes
649 name_len = avio_rl16(pb); // name length
650 for(i=0;i<name_len;i++){
651 avio_r8(pb); // skip the name
654 for(i=0;i<count;i++){
658 avio_rl64(pb); // offset, 8 bytes
659 pres_time = avio_rl64(pb); // presentation time
660 avio_rl16(pb); // entry length
661 avio_rl32(pb); // send time
662 avio_rl32(pb); // flags
663 name_len = avio_rl32(pb); // name length
664 if ((ret = avio_get_str16le(pb, name_len * 2, name, sizeof(name))) < name_len)
665 avio_skip(pb, name_len - ret);
666 avpriv_new_chapter(s, i, (AVRational){1, 10000000}, pres_time, AV_NOPTS_VALUE, name );
672 static int asf_read_header(AVFormatContext *s)
674 ASFContext *asf = s->priv_data;
676 AVIOContext *pb = s->pb;
681 if (ff_guidcmp(&g, &ff_asf_header))
682 return AVERROR_INVALIDDATA;
687 memset(&asf->asfid2avid, -1, sizeof(asf->asfid2avid));
689 uint64_t gpos= avio_tell(pb);
691 gsize = avio_rl64(pb);
692 av_dlog(s, "%08"PRIx64": ", gpos);
694 av_dlog(s, " size=0x%"PRIx64"\n", gsize);
695 if (!ff_guidcmp(&g, &ff_asf_data_header)) {
696 asf->data_object_offset = avio_tell(pb);
697 // if not streaming, gsize is not unlimited (how?), and there is enough space in the file..
698 if (!(asf->hdr.flags & 0x01) && gsize >= 100) {
699 asf->data_object_size = gsize - 24;
701 asf->data_object_size = (uint64_t)-1;
706 return AVERROR_INVALIDDATA;
707 if (!ff_guidcmp(&g, &ff_asf_file_header)) {
708 int ret = asf_read_file_properties(s, gsize);
711 } else if (!ff_guidcmp(&g, &ff_asf_stream_header)) {
712 asf_read_stream_properties(s, gsize);
713 } else if (!ff_guidcmp(&g, &ff_asf_comment_header)) {
714 asf_read_content_desc(s, gsize);
715 } else if (!ff_guidcmp(&g, &ff_asf_language_guid)) {
716 asf_read_language_list(s, gsize);
717 } else if (!ff_guidcmp(&g, &ff_asf_extended_content_header)) {
718 asf_read_ext_content_desc(s, gsize);
719 } else if (!ff_guidcmp(&g, &ff_asf_metadata_header)) {
720 asf_read_metadata(s, gsize);
721 } else if (!ff_guidcmp(&g, &ff_asf_ext_stream_header)) {
722 asf_read_ext_stream_properties(s, gsize);
724 // there could be a optional stream properties object to follow
725 // if so the next iteration will pick it up
727 } else if (!ff_guidcmp(&g, &ff_asf_head1_guid)) {
731 } else if (!ff_guidcmp(&g, &ff_asf_marker_header)) {
732 asf_read_marker(s, gsize);
733 } else if (url_feof(pb)) {
737 if (!ff_guidcmp(&g, &ff_asf_content_encryption)) {
740 av_log(s, AV_LOG_WARNING, "DRM protected stream detected, decoding will likely fail!\n");
742 av_log(s, AV_LOG_DEBUG, "Secret data:\n");
743 av_get_packet(pb, &pkt, len); av_hex_dump_log(s, AV_LOG_DEBUG, pkt.data, pkt.size); av_free_packet(&pkt);
745 get_tag(s, "ASF_Protection_Type", -1, len);
747 get_tag(s, "ASF_Key_ID", -1, len);
749 get_tag(s, "ASF_License_URL", -1, len);
750 } else if (!ff_guidcmp(&g, &ff_asf_ext_content_encryption)) {
751 av_log(s, AV_LOG_WARNING, "Ext DRM protected stream detected, decoding will likely fail!\n");
752 av_dict_set(&s->metadata, "encryption", "ASF Extended Content Encryption", 0);
753 } else if (!ff_guidcmp(&g, &ff_asf_digital_signature)) {
754 av_log(s, AV_LOG_INFO, "Digital signature detected!\n");
758 if(avio_tell(pb) != gpos + gsize)
759 av_log(s, AV_LOG_DEBUG, "gpos mismatch our pos=%"PRIu64", end=%"PRIu64"\n", avio_tell(pb)-gpos, gsize);
760 avio_seek(pb, gpos + gsize, SEEK_SET);
768 asf->data_offset = avio_tell(pb);
769 asf->packet_size_left = 0;
772 for(i=0; i<128; i++){
773 int stream_num= asf->asfid2avid[i];
775 AVStream *st = s->streams[stream_num];
776 if (!st->codec->bit_rate)
777 st->codec->bit_rate = asf->stream_bitrates[i];
778 if (asf->dar[i].num > 0 && asf->dar[i].den > 0){
779 av_reduce(&st->sample_aspect_ratio.num,
780 &st->sample_aspect_ratio.den,
781 asf->dar[i].num, asf->dar[i].den, INT_MAX);
782 } else if ((asf->dar[0].num > 0) && (asf->dar[0].den > 0) && (st->codec->codec_type==AVMEDIA_TYPE_VIDEO)) // Use ASF container value if the stream doesn't AR set.
783 av_reduce(&st->sample_aspect_ratio.num,
784 &st->sample_aspect_ratio.den,
785 asf->dar[0].num, asf->dar[0].den, INT_MAX);
787 //av_log(s, AV_LOG_INFO, "i=%d, st->codec->codec_type:%d, dar %d:%d sar=%d:%d\n", i, st->codec->codec_type, dar[i].num, dar[i].den, st->sample_aspect_ratio.num, st->sample_aspect_ratio.den);
789 // copy and convert language codes to the frontend
790 if (asf->streams[i].stream_language_index < 128) {
791 const char *rfc1766 = asf->stream_languages[asf->streams[i].stream_language_index];
792 if (rfc1766 && strlen(rfc1766) > 1) {
793 const char primary_tag[3] = { rfc1766[0], rfc1766[1], '\0' }; // ignore country code if any
794 const char *iso6392 = av_convert_lang_to(primary_tag, AV_LANG_ISO639_2_BIBL);
796 av_dict_set(&st->metadata, "language", iso6392, 0);
802 ff_metadata_conv(&s->metadata, NULL, ff_asf_metadata_conv);
807 #define DO_2BITS(bits, var, defval) \
810 case 3: var = avio_rl32(pb); rsize += 4; break; \
811 case 2: var = avio_rl16(pb); rsize += 2; break; \
812 case 1: var = avio_r8(pb); rsize++; break; \
813 default: var = defval; break; \
817 * Load a single ASF packet into the demuxer.
818 * @param s demux context
819 * @param pb context to read data from
820 * @return 0 on success, <0 on error
822 static int ff_asf_get_packet(AVFormatContext *s, AVIOContext *pb)
824 ASFContext *asf = s->priv_data;
825 uint32_t packet_length, padsize;
829 // if we do not know packet size, allow skipping up to 32 kB
831 if (asf->no_resync_search)
833 else if (s->packet_size > 0)
834 off= (avio_tell(pb) - s->data_offset) % s->packet_size + 3;
840 if(c == 0x82 && !d && !e)
846 * This code allows handling of -EAGAIN at packet boundaries (i.e.
847 * if the packet sync code above triggers -EAGAIN). This does not
848 * imply complete -EAGAIN handling support at random positions in
851 if (pb->error == AVERROR(EAGAIN))
852 return AVERROR(EAGAIN);
854 av_log(s, AV_LOG_ERROR, "ff asf bad header %x at:%"PRId64"\n", c, avio_tell(pb));
856 if ((c & 0x8f) == 0x82) {
859 av_log(s, AV_LOG_ERROR, "ff asf bad non zero\n");
860 return AVERROR_INVALIDDATA;
865 }else if(!url_feof(pb)){
866 avio_seek(pb, -1, SEEK_CUR); //FIXME
869 asf->packet_flags = c;
870 asf->packet_property = d;
872 DO_2BITS(asf->packet_flags >> 5, packet_length, s->packet_size);
873 DO_2BITS(asf->packet_flags >> 1, padsize, 0); // sequence ignored
874 DO_2BITS(asf->packet_flags >> 3, padsize, 0); // padding length
876 //the following checks prevent overflows and infinite loops
877 if(!packet_length || packet_length >= (1U<<29)){
878 av_log(s, AV_LOG_ERROR, "invalid packet_length %d at:%"PRId64"\n", packet_length, avio_tell(pb));
879 return AVERROR_INVALIDDATA;
881 if(padsize >= packet_length){
882 av_log(s, AV_LOG_ERROR, "invalid padsize %d at:%"PRId64"\n", padsize, avio_tell(pb));
883 return AVERROR_INVALIDDATA;
886 asf->packet_timestamp = avio_rl32(pb);
887 avio_rl16(pb); /* duration */
888 // rsize has at least 11 bytes which have to be present
890 if (asf->packet_flags & 0x01) {
891 asf->packet_segsizetype = avio_r8(pb); rsize++;
892 asf->packet_segments = asf->packet_segsizetype & 0x3f;
894 asf->packet_segments = 1;
895 asf->packet_segsizetype = 0x80;
897 if (rsize > packet_length - padsize) {
898 asf->packet_size_left = 0;
899 av_log(s, AV_LOG_ERROR,
900 "invalid packet header length %d for pktlen %d-%d at %"PRId64"\n",
901 rsize, packet_length, padsize, avio_tell(pb));
902 return AVERROR_INVALIDDATA;
904 asf->packet_size_left = packet_length - padsize - rsize;
905 if (packet_length < asf->hdr.min_pktsize)
906 padsize += asf->hdr.min_pktsize - packet_length;
907 asf->packet_padsize = padsize;
908 av_dlog(s, "packet: size=%d padsize=%d left=%d\n", s->packet_size, asf->packet_padsize, asf->packet_size_left);
914 * @return <0 if error
916 static int asf_read_frame_header(AVFormatContext *s, AVIOContext *pb){
917 ASFContext *asf = s->priv_data;
919 int num = avio_r8(pb);
920 int64_t ts0, ts1 av_unused;
922 asf->packet_segments--;
923 asf->packet_key_frame = num >> 7;
924 asf->stream_index = asf->asfid2avid[num & 0x7f];
925 // sequence should be ignored!
926 DO_2BITS(asf->packet_property >> 4, asf->packet_seq, 0);
927 DO_2BITS(asf->packet_property >> 2, asf->packet_frag_offset, 0);
928 DO_2BITS(asf->packet_property, asf->packet_replic_size, 0);
929 //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);
930 if (rsize+asf->packet_replic_size > asf->packet_size_left) {
931 av_log(s, AV_LOG_ERROR, "packet_replic_size %d is invalid\n", asf->packet_replic_size);
932 return AVERROR_INVALIDDATA;
934 if (asf->packet_replic_size >= 8) {
935 asf->packet_obj_size = avio_rl32(pb);
936 if(asf->packet_obj_size >= (1<<24) || asf->packet_obj_size <= 0){
937 av_log(s, AV_LOG_ERROR, "packet_obj_size invalid\n");
938 return AVERROR_INVALIDDATA;
940 asf->packet_frag_timestamp = avio_rl32(pb); // timestamp
941 if(asf->packet_replic_size >= 8+38+4){
942 // for(i=0; i<asf->packet_replic_size-8; i++)
943 // av_log(s, AV_LOG_DEBUG, "%02X ",avio_r8(pb));
944 // av_log(s, AV_LOG_DEBUG, "\n");
950 avio_skip(pb, asf->packet_replic_size - 8 - 38 - 4);
951 if(ts0!= -1) asf->packet_frag_timestamp= ts0/10000;
952 else asf->packet_frag_timestamp= AV_NOPTS_VALUE;
954 avio_skip(pb, asf->packet_replic_size - 8);
955 rsize += asf->packet_replic_size; // FIXME - check validity
956 } else if (asf->packet_replic_size==1){
957 // multipacket - frag_offset is beginning timestamp
958 asf->packet_time_start = asf->packet_frag_offset;
959 asf->packet_frag_offset = 0;
960 asf->packet_frag_timestamp = asf->packet_timestamp;
962 asf->packet_time_delta = avio_r8(pb);
964 }else if(asf->packet_replic_size!=0){
965 av_log(s, AV_LOG_ERROR, "unexpected packet_replic_size of %d\n", asf->packet_replic_size);
966 return AVERROR_INVALIDDATA;
968 if (asf->packet_flags & 0x01) {
969 DO_2BITS(asf->packet_segsizetype >> 6, asf->packet_frag_size, 0); // 0 is illegal
970 if (rsize > asf->packet_size_left) {
971 av_log(s, AV_LOG_ERROR, "packet_replic_size is invalid\n");
972 return AVERROR_INVALIDDATA;
973 } else if(asf->packet_frag_size > asf->packet_size_left - rsize){
974 if (asf->packet_frag_size > asf->packet_size_left - rsize + asf->packet_padsize) {
975 av_log(s, AV_LOG_ERROR, "packet_frag_size is invalid (%d-%d)\n", asf->packet_size_left, rsize);
976 return AVERROR_INVALIDDATA;
978 int diff = asf->packet_frag_size - (asf->packet_size_left - rsize);
979 asf->packet_size_left += diff;
980 asf->packet_padsize -= diff;
983 //printf("Fragsize %d\n", asf->packet_frag_size);
985 asf->packet_frag_size = asf->packet_size_left - rsize;
986 //printf("Using rest %d %d %d\n", asf->packet_frag_size, asf->packet_size_left, rsize);
988 if (asf->packet_replic_size == 1) {
989 asf->packet_multi_size = asf->packet_frag_size;
990 if (asf->packet_multi_size > asf->packet_size_left)
991 return AVERROR_INVALIDDATA;
993 asf->packet_size_left -= rsize;
994 //printf("___objsize____ %d %d rs:%d\n", asf->packet_obj_size, asf->packet_frag_offset, rsize);
1000 * Parse data from individual ASF packets (which were previously loaded
1001 * with asf_get_packet()).
1002 * @param s demux context
1003 * @param pb context to read data from
1004 * @param pkt pointer to store packet data into
1005 * @return 0 if data was stored in pkt, <0 on error or 1 if more ASF
1006 * packets need to be loaded (through asf_get_packet())
1008 static int ff_asf_parse_packet(AVFormatContext *s, AVIOContext *pb, AVPacket *pkt)
1010 ASFContext *asf = s->priv_data;
1011 ASFStream *asf_st = 0;
1016 if (asf->packet_size_left < FRAME_HEADER_SIZE
1017 || asf->packet_segments < 1) {
1018 //asf->packet_size_left <= asf->packet_padsize) {
1019 int ret = asf->packet_size_left + asf->packet_padsize;
1020 //printf("PacketLeftSize:%d Pad:%d Pos:%"PRId64"\n", asf->packet_size_left, asf->packet_padsize, avio_tell(pb));
1025 asf->packet_pos= avio_tell(pb);
1026 if (asf->data_object_size != (uint64_t)-1 &&
1027 (asf->packet_pos - asf->data_object_offset >= asf->data_object_size))
1028 return AVERROR_EOF; /* Do not exceed the size of the data object */
1031 if (asf->packet_time_start == 0) {
1032 if(asf_read_frame_header(s, pb) < 0){
1033 asf->packet_segments= 0;
1036 if (asf->stream_index < 0
1037 || s->streams[asf->stream_index]->discard >= AVDISCARD_ALL
1038 || (!asf->packet_key_frame && s->streams[asf->stream_index]->discard >= AVDISCARD_NONKEY)
1040 asf->packet_time_start = 0;
1041 /* unhandled packet (should not happen) */
1042 avio_skip(pb, asf->packet_frag_size);
1043 asf->packet_size_left -= asf->packet_frag_size;
1044 if(asf->stream_index < 0)
1045 av_log(s, AV_LOG_ERROR, "ff asf skip %d (unknown stream)\n", asf->packet_frag_size);
1048 asf->asf_st = s->streams[asf->stream_index]->priv_data;
1050 asf_st = asf->asf_st;
1052 if (asf->packet_replic_size == 1) {
1053 // frag_offset is here used as the beginning timestamp
1054 asf->packet_frag_timestamp = asf->packet_time_start;
1055 asf->packet_time_start += asf->packet_time_delta;
1056 asf->packet_obj_size = asf->packet_frag_size = avio_r8(pb);
1057 asf->packet_size_left--;
1058 asf->packet_multi_size--;
1059 if (asf->packet_multi_size < asf->packet_obj_size)
1061 asf->packet_time_start = 0;
1062 avio_skip(pb, asf->packet_multi_size);
1063 asf->packet_size_left -= asf->packet_multi_size;
1066 asf->packet_multi_size -= asf->packet_obj_size;
1067 //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);
1069 if( /*asf->packet_frag_size == asf->packet_obj_size*/
1070 asf_st->frag_offset + asf->packet_frag_size <= asf_st->pkt.size
1071 && asf_st->frag_offset + asf->packet_frag_size > asf->packet_obj_size){
1072 av_log(s, AV_LOG_INFO, "ignoring invalid packet_obj_size (%d %d %d %d)\n",
1073 asf_st->frag_offset, asf->packet_frag_size,
1074 asf->packet_obj_size, asf_st->pkt.size);
1075 asf->packet_obj_size= asf_st->pkt.size;
1078 if ( asf_st->pkt.size != asf->packet_obj_size
1079 || asf_st->frag_offset + asf->packet_frag_size > asf_st->pkt.size) { //FIXME is this condition sufficient?
1080 if(asf_st->pkt.data){
1081 av_log(s, AV_LOG_INFO, "freeing incomplete packet size %d, new %d\n", asf_st->pkt.size, asf->packet_obj_size);
1082 asf_st->frag_offset = 0;
1083 av_free_packet(&asf_st->pkt);
1086 av_new_packet(&asf_st->pkt, asf->packet_obj_size);
1087 asf_st->seq = asf->packet_seq;
1088 asf_st->pkt.dts = asf->packet_frag_timestamp - asf->hdr.preroll;
1089 asf_st->pkt.stream_index = asf->stream_index;
1091 asf_st->packet_pos= asf->packet_pos;
1092 if (asf_st->pkt.data && asf_st->palette_changed) {
1094 pal = av_packet_new_side_data(&asf_st->pkt, AV_PKT_DATA_PALETTE,
1097 av_log(s, AV_LOG_ERROR, "Cannot append palette to packet\n");
1099 memcpy(pal, asf_st->palette, AVPALETTE_SIZE);
1100 asf_st->palette_changed = 0;
1103 //printf("new packet: stream:%d key:%d packet_key:%d audio:%d size:%d\n",
1104 //asf->stream_index, asf->packet_key_frame, asf_st->pkt.flags & AV_PKT_FLAG_KEY,
1105 //s->streams[asf->stream_index]->codec->codec_type == AVMEDIA_TYPE_AUDIO, asf->packet_obj_size);
1106 if (s->streams[asf->stream_index]->codec->codec_type == AVMEDIA_TYPE_AUDIO)
1107 asf->packet_key_frame = 1;
1108 if (asf->packet_key_frame)
1109 asf_st->pkt.flags |= AV_PKT_FLAG_KEY;
1113 //printf("READ PACKET s:%d os:%d o:%d,%d l:%d DATA:%p\n",
1114 // s->packet_size, asf_st->pkt.size, asf->packet_frag_offset,
1115 // asf_st->frag_offset, asf->packet_frag_size, asf_st->pkt.data);
1116 asf->packet_size_left -= asf->packet_frag_size;
1117 if (asf->packet_size_left < 0)
1120 if( asf->packet_frag_offset >= asf_st->pkt.size
1121 || asf->packet_frag_size > asf_st->pkt.size - asf->packet_frag_offset){
1122 av_log(s, AV_LOG_ERROR, "packet fragment position invalid %u,%u not in %u\n",
1123 asf->packet_frag_offset, asf->packet_frag_size, asf_st->pkt.size);
1127 ret = avio_read(pb, asf_st->pkt.data + asf->packet_frag_offset,
1128 asf->packet_frag_size);
1129 if (ret != asf->packet_frag_size) {
1130 if (ret < 0 || asf->packet_frag_offset + ret == 0)
1131 return ret < 0 ? ret : AVERROR_EOF;
1132 if (asf_st->ds_span > 1) {
1133 // scrambling, we can either drop it completely or fill the remainder
1134 // TODO: should we fill the whole packet instead of just the current
1136 memset(asf_st->pkt.data + asf->packet_frag_offset + ret, 0,
1137 asf->packet_frag_size - ret);
1138 ret = asf->packet_frag_size;
1140 // no scrambling, so we can return partial packets
1141 av_shrink_packet(&asf_st->pkt, asf->packet_frag_offset + ret);
1143 if (s->key && s->keylen == 20)
1144 ff_asfcrypt_dec(s->key, asf_st->pkt.data + asf->packet_frag_offset,
1146 asf_st->frag_offset += ret;
1147 /* test if whole packet is read */
1148 if (asf_st->frag_offset == asf_st->pkt.size) {
1149 //workaround for macroshit radio DVR-MS files
1150 if( s->streams[asf->stream_index]->codec->codec_id == AV_CODEC_ID_MPEG2VIDEO
1151 && asf_st->pkt.size > 100){
1153 for(i=0; i<asf_st->pkt.size && !asf_st->pkt.data[i]; i++);
1154 if(i == asf_st->pkt.size){
1155 av_log(s, AV_LOG_DEBUG, "discarding ms fart\n");
1156 asf_st->frag_offset = 0;
1157 av_free_packet(&asf_st->pkt);
1163 if (asf_st->ds_span > 1) {
1164 if(asf_st->pkt.size != asf_st->ds_packet_size * asf_st->ds_span){
1165 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);
1167 /* packet descrambling */
1168 uint8_t *newdata = av_malloc(asf_st->pkt.size + FF_INPUT_BUFFER_PADDING_SIZE);
1171 memset(newdata + asf_st->pkt.size, 0, FF_INPUT_BUFFER_PADDING_SIZE);
1172 while (offset < asf_st->pkt.size) {
1173 int off = offset / asf_st->ds_chunk_size;
1174 int row = off / asf_st->ds_span;
1175 int col = off % asf_st->ds_span;
1176 int idx = row + col * asf_st->ds_packet_size / asf_st->ds_chunk_size;
1177 //printf("off:%d row:%d col:%d idx:%d\n", off, row, col, idx);
1179 assert(offset + asf_st->ds_chunk_size <= asf_st->pkt.size);
1180 assert(idx+1 <= asf_st->pkt.size / asf_st->ds_chunk_size);
1181 memcpy(newdata + offset,
1182 asf_st->pkt.data + idx * asf_st->ds_chunk_size,
1183 asf_st->ds_chunk_size);
1184 offset += asf_st->ds_chunk_size;
1186 av_free(asf_st->pkt.data);
1187 asf_st->pkt.data = newdata;
1191 asf_st->frag_offset = 0;
1193 //printf("packet %d %d\n", asf_st->pkt.size, asf->packet_frag_size);
1194 asf_st->pkt.size = 0;
1195 asf_st->pkt.data = 0;
1196 asf_st->pkt.side_data_elems = 0;
1197 asf_st->pkt.side_data = NULL;
1198 break; // packet completed
1204 static int asf_read_packet(AVFormatContext *s, AVPacket *pkt)
1206 ASFContext *asf = s->priv_data;
1211 /* parse cached packets, if any */
1212 if ((ret = ff_asf_parse_packet(s, s->pb, pkt)) <= 0)
1214 if ((ret = ff_asf_get_packet(s, s->pb)) < 0)
1215 assert(asf->packet_size_left < FRAME_HEADER_SIZE || asf->packet_segments < 1);
1216 asf->packet_time_start = 0;
1220 // Added to support seeking after packets have been read
1221 // If information is not reset, read_packet fails due to
1222 // leftover information from previous reads
1223 static void asf_reset_header(AVFormatContext *s)
1225 ASFContext *asf = s->priv_data;
1229 asf->packet_size_left = 0;
1230 asf->packet_segments = 0;
1231 asf->packet_flags = 0;
1232 asf->packet_property = 0;
1233 asf->packet_timestamp = 0;
1234 asf->packet_segsizetype = 0;
1235 asf->packet_segments = 0;
1236 asf->packet_seq = 0;
1237 asf->packet_replic_size = 0;
1238 asf->packet_key_frame = 0;
1239 asf->packet_padsize = 0;
1240 asf->packet_frag_offset = 0;
1241 asf->packet_frag_size = 0;
1242 asf->packet_frag_timestamp = 0;
1243 asf->packet_multi_size = 0;
1244 asf->packet_obj_size = 0;
1245 asf->packet_time_delta = 0;
1246 asf->packet_time_start = 0;
1248 for(i=0; i<s->nb_streams; i++){
1249 asf_st= s->streams[i]->priv_data;
1250 av_free_packet(&asf_st->pkt);
1251 asf_st->frag_offset=0;
1257 static int asf_read_close(AVFormatContext *s)
1259 asf_reset_header(s);
1264 static int64_t asf_read_pts(AVFormatContext *s, int stream_index, int64_t *ppos, int64_t pos_limit)
1266 AVPacket pkt1, *pkt = &pkt1;
1271 int64_t start_pos[ASF_MAX_STREAMS];
1273 for(i=0; i<s->nb_streams; i++){
1277 if (s->packet_size > 0)
1278 pos= (pos+s->packet_size-1-s->data_offset)/s->packet_size*s->packet_size+ s->data_offset;
1280 if (avio_seek(s->pb, pos, SEEK_SET) < 0)
1281 return AV_NOPTS_VALUE;
1283 //printf("asf_read_pts\n");
1284 asf_reset_header(s);
1286 if (av_read_frame(s, pkt) < 0){
1287 av_log(s, AV_LOG_INFO, "asf_read_pts failed\n");
1288 return AV_NOPTS_VALUE;
1293 av_free_packet(pkt);
1294 if(pkt->flags&AV_PKT_FLAG_KEY){
1295 i= pkt->stream_index;
1297 asf_st= s->streams[i]->priv_data;
1299 // assert((asf_st->packet_pos - s->data_offset) % s->packet_size == 0);
1300 pos= asf_st->packet_pos;
1302 av_add_index_entry(s->streams[i], pos, pts, pkt->size, pos - start_pos[i] + 1, AVINDEX_KEYFRAME);
1303 start_pos[i]= asf_st->packet_pos + 1;
1305 if(pkt->stream_index == stream_index)
1311 //printf("found keyframe at %"PRId64" stream %d stamp:%"PRId64"\n", *ppos, stream_index, pts);
1316 static void asf_build_simple_index(AVFormatContext *s, int stream_index)
1319 ASFContext *asf = s->priv_data;
1320 int64_t current_pos= avio_tell(s->pb);
1322 if(avio_seek(s->pb, asf->data_object_offset + asf->data_object_size, SEEK_SET) < 0) {
1323 asf->index_read= -1;
1327 ff_get_guid(s->pb, &g);
1329 /* the data object can be followed by other top-level objects,
1330 skip them until the simple index object is reached */
1331 while (ff_guidcmp(&g, &ff_asf_simple_index_header)) {
1332 int64_t gsize= avio_rl64(s->pb);
1333 if (gsize < 24 || url_feof(s->pb)) {
1334 avio_seek(s->pb, current_pos, SEEK_SET);
1335 asf->index_read= -1;
1338 avio_skip(s->pb, gsize-24);
1339 ff_get_guid(s->pb, &g);
1343 int64_t itime, last_pos=-1;
1346 int64_t av_unused gsize= avio_rl64(s->pb);
1347 ff_get_guid(s->pb, &g);
1348 itime=avio_rl64(s->pb);
1349 pct=avio_rl32(s->pb);
1350 ict=avio_rl32(s->pb);
1351 av_log(s, AV_LOG_DEBUG, "itime:0x%"PRIx64", pct:%d, ict:%d\n",itime,pct,ict);
1353 for (i=0;i<ict;i++){
1354 int pktnum=avio_rl32(s->pb);
1355 int pktct =avio_rl16(s->pb);
1356 int64_t pos = s->data_offset + s->packet_size*(int64_t)pktnum;
1357 int64_t index_pts= FFMAX(av_rescale(itime, i, 10000) - asf->hdr.preroll, 0);
1359 if(pos != last_pos){
1360 av_log(s, AV_LOG_DEBUG, "pktnum:%d, pktct:%d pts: %"PRId64"\n", pktnum, pktct, index_pts);
1361 av_add_index_entry(s->streams[stream_index], pos, index_pts, s->packet_size, 0, AVINDEX_KEYFRAME);
1365 asf->index_read= ict > 1;
1367 avio_seek(s->pb, current_pos, SEEK_SET);
1370 static int asf_read_seek(AVFormatContext *s, int stream_index, int64_t pts, int flags)
1372 ASFContext *asf = s->priv_data;
1373 AVStream *st = s->streams[stream_index];
1375 if (s->packet_size <= 0)
1378 /* Try using the protocol's read_seek if available */
1380 int ret = avio_seek_time(s->pb, stream_index, pts, flags);
1382 asf_reset_header(s);
1383 if (ret != AVERROR(ENOSYS))
1387 if (!asf->index_read)
1388 asf_build_simple_index(s, stream_index);
1390 if((asf->index_read > 0 && st->index_entries)){
1391 int index= av_index_search_timestamp(st, pts, flags);
1393 /* find the position */
1394 uint64_t pos = st->index_entries[index].pos;
1397 av_log(s, AV_LOG_DEBUG, "SEEKTO: %"PRId64"\n", pos);
1398 if(avio_seek(s->pb, pos, SEEK_SET) < 0)
1400 asf_reset_header(s);
1404 /* no index or seeking by index failed */
1405 if (ff_seek_frame_binary(s, stream_index, pts, flags) < 0)
1407 asf_reset_header(s);
1411 AVInputFormat ff_asf_demuxer = {
1413 .long_name = NULL_IF_CONFIG_SMALL("ASF (Advanced / Active Streaming Format)"),
1414 .priv_data_size = sizeof(ASFContext),
1415 .read_probe = asf_probe,
1416 .read_header = asf_read_header,
1417 .read_packet = asf_read_packet,
1418 .read_close = asf_read_close,
1419 .read_seek = asf_read_seek,
1420 .read_timestamp = asf_read_pts,
1421 .flags = AVFMT_NOBINSEARCH | AVFMT_NOGENSEARCH,
1422 .priv_class = &asf_class,