2 * ASF compatible demuxer
3 * Copyright (c) 2000, 2001 Fabrice Bellard
5 * This file is part of Libav.
7 * Libav 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 * Libav 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 Libav; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
24 #include "libavutil/attributes.h"
25 #include "libavutil/avassert.h"
26 #include "libavutil/avstring.h"
27 #include "libavutil/bswap.h"
28 #include "libavutil/common.h"
29 #include "libavutil/dict.h"
30 #include "libavutil/mathematics.h"
31 #include "libavutil/opt.h"
33 #include "avio_internal.h"
34 #include "avlanguage.h"
43 int asfid2avid[128]; ///< conversion table from asf ID 2 AVStream ID
44 ASFStream streams[128]; ///< it's max number and it's not that big
45 uint32_t stream_bitrates[128]; ///< max number of streams, bitrate for each (for streaming)
47 char stream_languages[128][6]; ///< max number of streams, language for each (RFC1766, e.g. en-US)
48 /* non streamed additonnal info */
51 /* only for reading */
52 uint64_t data_offset; ///< beginning of the first data packet
53 uint64_t data_object_offset; ///< data object offset (excl. GUID & size)
54 uint64_t data_object_size; ///< size of the data object
62 int packet_segsizetype;
65 int packet_replic_size;
68 unsigned int packet_frag_offset;
69 unsigned int packet_frag_size;
70 int64_t packet_frag_timestamp;
71 int packet_multi_size;
73 int packet_time_delta;
74 int packet_time_start;
79 ASFStream *asf_st; ///< currently decoded stream
84 static const AVOption options[] = {
85 { "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 },
89 static const AVClass asf_class = {
90 .class_name = "asf demuxer",
91 .item_name = av_default_item_name,
93 .version = LIBAVUTIL_VERSION_INT,
99 #define ASF_MAX_STREAMS 127
100 #define FRAME_HEADER_SIZE 17
101 // Fix Me! FRAME_HEADER_SIZE may be different.
103 static const ff_asf_guid index_guid = {
104 0x90, 0x08, 0x00, 0x33, 0xb1, 0xe5, 0xcf, 0x11, 0x89, 0xf4, 0x00, 0xa0, 0xc9, 0x03, 0x49, 0xcb
108 static const ff_asf_guid stream_bitrate_guid = { /* (http://get.to/sdp) */
109 0xce, 0x75, 0xf8, 0x7b, 0x8d, 0x46, 0xd1, 0x11, 0x8d, 0x82, 0x00, 0x60, 0x97, 0xc9, 0xa2, 0xb2
112 #define PRINT_IF_GUID(g, cmp) \
113 if (!ff_guidcmp(g, &cmp)) \
114 av_dlog(NULL, "(GUID: %s) ", # cmp)
116 static void print_guid(ff_asf_guid *g)
119 PRINT_IF_GUID(g, ff_asf_header);
120 else PRINT_IF_GUID(g, ff_asf_file_header);
121 else PRINT_IF_GUID(g, ff_asf_stream_header);
122 else PRINT_IF_GUID(g, ff_asf_audio_stream);
123 else PRINT_IF_GUID(g, ff_asf_audio_conceal_none);
124 else PRINT_IF_GUID(g, ff_asf_video_stream);
125 else PRINT_IF_GUID(g, ff_asf_video_conceal_none);
126 else PRINT_IF_GUID(g, ff_asf_command_stream);
127 else PRINT_IF_GUID(g, ff_asf_comment_header);
128 else PRINT_IF_GUID(g, ff_asf_codec_comment_header);
129 else PRINT_IF_GUID(g, ff_asf_codec_comment1_header);
130 else PRINT_IF_GUID(g, ff_asf_data_header);
131 else PRINT_IF_GUID(g, index_guid);
132 else PRINT_IF_GUID(g, ff_asf_head1_guid);
133 else PRINT_IF_GUID(g, ff_asf_head2_guid);
134 else PRINT_IF_GUID(g, ff_asf_my_guid);
135 else PRINT_IF_GUID(g, ff_asf_ext_stream_header);
136 else PRINT_IF_GUID(g, ff_asf_extended_content_header);
137 else PRINT_IF_GUID(g, ff_asf_ext_stream_embed_stream_header);
138 else PRINT_IF_GUID(g, ff_asf_ext_stream_audio_stream);
139 else PRINT_IF_GUID(g, ff_asf_metadata_header);
140 else PRINT_IF_GUID(g, ff_asf_metadata_library_header);
141 else PRINT_IF_GUID(g, ff_asf_marker_header);
142 else PRINT_IF_GUID(g, stream_bitrate_guid);
143 else PRINT_IF_GUID(g, ff_asf_language_guid);
145 av_dlog(NULL, "(GUID: unknown) ");
146 for (i = 0; i < 16; i++)
147 av_dlog(NULL, " 0x%02x,", (*g)[i]);
148 av_dlog(NULL, "}\n");
152 #define print_guid(g)
155 void ff_get_guid(AVIOContext *s, ff_asf_guid *g)
157 assert(sizeof(*g) == 16);
158 avio_read(s, *g, sizeof(*g));
161 static int asf_probe(AVProbeData *pd)
163 /* check file header */
164 if (!ff_guidcmp(pd->buf, &ff_asf_header))
165 return AVPROBE_SCORE_MAX;
170 /* size of type 2 (BOOL) is 32bit for "Extended Content Description Object"
171 * but 16 bit for "Metadata Object" and "Metadata Library Object" */
172 static int get_value(AVIOContext *pb, int type, int type2_size)
176 return (type2_size == 32) ? avio_rl32(pb) : avio_rl16(pb);
178 return avio_rl32(pb);
180 return avio_rl64(pb);
182 return avio_rl16(pb);
188 /* MSDN claims that this should be "compatible with the ID3 frame, APIC",
189 * but in reality this is only loosely similar */
190 static int asf_read_picture(AVFormatContext *s, int len)
192 AVPacket pkt = { 0 };
193 const CodecMime *mime = ff_id3v2_mime_tags;
194 enum AVCodecID id = AV_CODEC_ID_NONE;
196 uint8_t *desc = NULL;
198 int ret, type, picsize, desc_len;
200 /* type + picsize + mime + desc */
201 if (len < 1 + 4 + 2 + 2) {
202 av_log(s, AV_LOG_ERROR, "Invalid attached picture size: %d.\n", len);
203 return AVERROR_INVALIDDATA;
207 type = avio_r8(s->pb);
209 if (type >= FF_ARRAY_ELEMS(ff_id3v2_picture_types) || type < 0) {
210 av_log(s, AV_LOG_WARNING, "Unknown attached picture type: %d.\n", type);
214 /* picture data size */
215 picsize = avio_rl32(s->pb);
218 /* picture MIME type */
219 len -= avio_get_str16le(s->pb, len, mimetype, sizeof(mimetype));
220 while (mime->id != AV_CODEC_ID_NONE) {
221 if (!strncmp(mime->str, mimetype, sizeof(mimetype))) {
227 if (id == AV_CODEC_ID_NONE) {
228 av_log(s, AV_LOG_ERROR, "Unknown attached picture mimetype: %s.\n",
233 if (picsize >= len) {
234 av_log(s, AV_LOG_ERROR, "Invalid attached picture data size: %d >= %d.\n",
236 return AVERROR_INVALIDDATA;
239 /* picture description */
240 desc_len = (len - picsize) * 2 + 1;
241 desc = av_malloc(desc_len);
243 return AVERROR(ENOMEM);
244 len -= avio_get_str16le(s->pb, len - picsize, desc, desc_len);
246 ret = av_get_packet(s->pb, &pkt, picsize);
250 st = avformat_new_stream(s, NULL);
252 ret = AVERROR(ENOMEM);
255 st->disposition |= AV_DISPOSITION_ATTACHED_PIC;
256 st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
257 st->codec->codec_id = id;
258 st->attached_pic = pkt;
259 st->attached_pic.stream_index = st->index;
260 st->attached_pic.flags |= AV_PKT_FLAG_KEY;
263 av_dict_set(&st->metadata, "title", desc, AV_DICT_DONT_STRDUP_VAL);
267 av_dict_set(&st->metadata, "comment", ff_id3v2_picture_types[type], 0);
273 av_free_packet(&pkt);
277 static void get_id3_tag(AVFormatContext *s, int len)
279 ID3v2ExtraMeta *id3v2_extra_meta = NULL;
281 ff_id3v2_read(s, ID3v2_DEFAULT_MAGIC, &id3v2_extra_meta);
282 if (id3v2_extra_meta)
283 ff_id3v2_parse_apic(s, &id3v2_extra_meta);
284 ff_id3v2_free_extra_meta(&id3v2_extra_meta);
287 static void get_tag(AVFormatContext *s, const char *key, int type, int len, int type2_size)
290 int64_t off = avio_tell(s->pb);
292 if ((unsigned)len >= (UINT_MAX - 1) / 2)
295 value = av_malloc(2 * len + 1);
299 if (type == 0) { // UTF16-LE
300 avio_get_str16le(s->pb, len, value, 2 * len + 1);
301 } else if (type == 1) { // byte array
302 if (!strcmp(key, "WM/Picture")) { // handle cover art
303 asf_read_picture(s, len);
304 } else if (!strcmp(key, "ID3")) { // handle ID3 tag
307 av_log(s, AV_LOG_VERBOSE, "Unsupported byte array in tag %s.\n", key);
310 } else if (type > 1 && type <= 5) { // boolean or DWORD or QWORD or WORD
311 uint64_t num = get_value(s->pb, type, type2_size);
312 snprintf(value, len, "%"PRIu64, num);
313 } else if (type == 6) { // (don't) handle GUID
314 av_log(s, AV_LOG_DEBUG, "Unsupported GUID value in tag %s.\n", key);
317 av_log(s, AV_LOG_DEBUG,
318 "Unsupported value type %d in tag %s.\n", type, key);
322 av_dict_set(&s->metadata, key, value, 0);
326 avio_seek(s->pb, off + len, SEEK_SET);
329 static int asf_read_file_properties(AVFormatContext *s, int64_t size)
331 ASFContext *asf = s->priv_data;
332 AVIOContext *pb = s->pb;
334 ff_get_guid(pb, &asf->hdr.guid);
335 asf->hdr.file_size = avio_rl64(pb);
336 asf->hdr.create_time = avio_rl64(pb);
337 avio_rl64(pb); /* number of packets */
338 asf->hdr.play_time = avio_rl64(pb);
339 asf->hdr.send_time = avio_rl64(pb);
340 asf->hdr.preroll = avio_rl32(pb);
341 asf->hdr.ignore = avio_rl32(pb);
342 asf->hdr.flags = avio_rl32(pb);
343 asf->hdr.min_pktsize = avio_rl32(pb);
344 asf->hdr.max_pktsize = avio_rl32(pb);
345 if (asf->hdr.min_pktsize >= (1U << 29))
346 return AVERROR_INVALIDDATA;
347 asf->hdr.max_bitrate = avio_rl32(pb);
348 s->packet_size = asf->hdr.max_pktsize;
353 static int asf_read_stream_properties(AVFormatContext *s, int64_t size)
355 ASFContext *asf = s->priv_data;
356 AVIOContext *pb = s->pb;
360 enum AVMediaType type;
361 int type_specific_size, sizeX;
363 int64_t pos1, pos2, start_time;
364 int test_for_ext_stream_audio, is_dvr_ms_audio = 0;
366 if (s->nb_streams == ASF_MAX_STREAMS) {
367 av_log(s, AV_LOG_ERROR, "too many streams\n");
368 return AVERROR(EINVAL);
371 pos1 = avio_tell(pb);
373 st = avformat_new_stream(s, NULL);
375 return AVERROR(ENOMEM);
376 avpriv_set_pts_info(st, 32, 1, 1000); /* 32 bit pts in ms */
377 asf_st = av_mallocz(sizeof(ASFStream));
379 return AVERROR(ENOMEM);
380 st->priv_data = asf_st;
382 start_time = asf->hdr.preroll;
384 asf_st->stream_language_index = 128; // invalid stream index means no language info
386 if (!(asf->hdr.flags & 0x01)) { // if we aren't streaming...
387 st->duration = asf->hdr.play_time /
388 (10000000 / 1000) - start_time;
392 test_for_ext_stream_audio = 0;
393 if (!ff_guidcmp(&g, &ff_asf_audio_stream)) {
394 type = AVMEDIA_TYPE_AUDIO;
395 } else if (!ff_guidcmp(&g, &ff_asf_video_stream)) {
396 type = AVMEDIA_TYPE_VIDEO;
397 } else if (!ff_guidcmp(&g, &ff_asf_jfif_media)) {
398 type = AVMEDIA_TYPE_VIDEO;
399 st->codec->codec_id = AV_CODEC_ID_MJPEG;
400 } else if (!ff_guidcmp(&g, &ff_asf_command_stream)) {
401 type = AVMEDIA_TYPE_DATA;
402 } else if (!ff_guidcmp(&g, &ff_asf_ext_stream_embed_stream_header)) {
403 test_for_ext_stream_audio = 1;
404 type = AVMEDIA_TYPE_UNKNOWN;
409 avio_skip(pb, 8); /* total_size */
410 type_specific_size = avio_rl32(pb);
412 st->id = avio_rl16(pb) & 0x7f; /* stream id */
413 // mapping of asf ID to AV stream ID;
414 asf->asfid2avid[st->id] = s->nb_streams - 1;
418 if (test_for_ext_stream_audio) {
420 if (!ff_guidcmp(&g, &ff_asf_ext_stream_audio_stream)) {
421 type = AVMEDIA_TYPE_AUDIO;
432 st->codec->codec_type = type;
433 if (type == AVMEDIA_TYPE_AUDIO) {
434 int ret = ff_get_wav_header(pb, st->codec, type_specific_size);
437 if (is_dvr_ms_audio) {
438 // codec_id and codec_tag are unreliable in dvr_ms
439 // files. Set them later by probing stream.
440 st->codec->codec_id = AV_CODEC_ID_PROBE;
441 st->codec->codec_tag = 0;
443 if (st->codec->codec_id == AV_CODEC_ID_AAC)
444 st->need_parsing = AVSTREAM_PARSE_NONE;
446 st->need_parsing = AVSTREAM_PARSE_FULL;
447 /* We have to init the frame size at some point .... */
448 pos2 = avio_tell(pb);
449 if (size >= (pos2 + 8 - pos1 + 24)) {
450 asf_st->ds_span = avio_r8(pb);
451 asf_st->ds_packet_size = avio_rl16(pb);
452 asf_st->ds_chunk_size = avio_rl16(pb);
453 avio_rl16(pb); // ds_data_size
454 avio_r8(pb); // ds_silence_data
456 if (asf_st->ds_span > 1) {
457 if (!asf_st->ds_chunk_size ||
458 (asf_st->ds_packet_size / asf_st->ds_chunk_size <= 1) ||
459 asf_st->ds_packet_size % asf_st->ds_chunk_size)
460 asf_st->ds_span = 0; // disable descrambling
462 } else if (type == AVMEDIA_TYPE_VIDEO &&
463 size - (avio_tell(pb) - pos1 + 24) >= 51) {
467 avio_rl16(pb); /* size */
468 sizeX = avio_rl32(pb); /* size */
469 st->codec->width = avio_rl32(pb);
470 st->codec->height = avio_rl32(pb);
471 /* not available for asf */
472 avio_rl16(pb); /* panes */
473 st->codec->bits_per_coded_sample = avio_rl16(pb); /* depth */
474 tag1 = avio_rl32(pb);
477 st->codec->extradata_size = sizeX - 40;
478 st->codec->extradata = av_mallocz(st->codec->extradata_size +
479 FF_INPUT_BUFFER_PADDING_SIZE);
480 avio_read(pb, st->codec->extradata, st->codec->extradata_size);
483 /* Extract palette from extradata if bpp <= 8 */
484 /* This code assumes that extradata contains only palette */
485 /* This is true for all paletted codecs implemented in libavcodec */
486 if (st->codec->extradata_size && (st->codec->bits_per_coded_sample <= 8)) {
489 for (i = 0; i < FFMIN(st->codec->extradata_size, AVPALETTE_SIZE) / 4; i++)
490 asf_st->palette[i] = av_bswap32(((uint32_t *)st->codec->extradata)[i]);
492 memcpy(asf_st->palette, st->codec->extradata,
493 FFMIN(st->codec->extradata_size, AVPALETTE_SIZE));
495 asf_st->palette_changed = 1;
498 st->codec->codec_tag = tag1;
499 st->codec->codec_id = ff_codec_get_id(ff_codec_bmp_tags, tag1);
500 if (tag1 == MKTAG('D', 'V', 'R', ' ')) {
501 st->need_parsing = AVSTREAM_PARSE_FULL;
502 /* issue658 contains wrong w/h and MS even puts a fake seq header
503 * with wrong w/h in extradata while a correct one is in the stream.
504 * maximum lameness */
506 st->codec->height = 0;
507 av_freep(&st->codec->extradata);
508 st->codec->extradata_size = 0;
510 if (st->codec->codec_id == AV_CODEC_ID_H264)
511 st->need_parsing = AVSTREAM_PARSE_FULL_ONCE;
513 pos2 = avio_tell(pb);
514 avio_skip(pb, size - (pos2 - pos1 + 24));
519 static int asf_read_ext_stream_properties(AVFormatContext *s, int64_t size)
521 ASFContext *asf = s->priv_data;
522 AVIOContext *pb = s->pb;
524 int ext_len, payload_ext_ct, stream_ct, i;
525 uint32_t leak_rate, stream_num;
526 unsigned int stream_languageid_index;
528 avio_rl64(pb); // starttime
529 avio_rl64(pb); // endtime
530 leak_rate = avio_rl32(pb); // leak-datarate
531 avio_rl32(pb); // bucket-datasize
532 avio_rl32(pb); // init-bucket-fullness
533 avio_rl32(pb); // alt-leak-datarate
534 avio_rl32(pb); // alt-bucket-datasize
535 avio_rl32(pb); // alt-init-bucket-fullness
536 avio_rl32(pb); // max-object-size
537 avio_rl32(pb); // flags (reliable,seekable,no_cleanpoints?,resend-live-cleanpoints, rest of bits reserved)
538 stream_num = avio_rl16(pb); // stream-num
540 stream_languageid_index = avio_rl16(pb); // stream-language-id-index
541 if (stream_num < 128)
542 asf->streams[stream_num].stream_language_index = stream_languageid_index;
544 avio_rl64(pb); // avg frametime in 100ns units
545 stream_ct = avio_rl16(pb); // stream-name-count
546 payload_ext_ct = avio_rl16(pb); // payload-extension-system-count
548 if (stream_num < 128)
549 asf->stream_bitrates[stream_num] = leak_rate;
551 for (i = 0; i < stream_ct; i++) {
553 ext_len = avio_rl16(pb);
554 avio_skip(pb, ext_len);
557 for (i = 0; i < payload_ext_ct; i++) {
560 ext_len = avio_rl32(pb);
561 avio_skip(pb, ext_len);
567 static int asf_read_content_desc(AVFormatContext *s, int64_t size)
569 AVIOContext *pb = s->pb;
570 int len1, len2, len3, len4, len5;
572 len1 = avio_rl16(pb);
573 len2 = avio_rl16(pb);
574 len3 = avio_rl16(pb);
575 len4 = avio_rl16(pb);
576 len5 = avio_rl16(pb);
577 get_tag(s, "title", 0, len1, 32);
578 get_tag(s, "author", 0, len2, 32);
579 get_tag(s, "copyright", 0, len3, 32);
580 get_tag(s, "comment", 0, len4, 32);
586 static int asf_read_ext_content_desc(AVFormatContext *s, int64_t size)
588 AVIOContext *pb = s->pb;
589 ASFContext *asf = s->priv_data;
590 int desc_count, i, ret;
592 desc_count = avio_rl16(pb);
593 for (i = 0; i < desc_count; i++) {
594 int name_len, value_type, value_len;
597 name_len = avio_rl16(pb);
598 if (name_len % 2) // must be even, broken lavf versions wrote len-1
600 if ((ret = avio_get_str16le(pb, name_len, name, sizeof(name))) < name_len)
601 avio_skip(pb, name_len - ret);
602 value_type = avio_rl16(pb);
603 value_len = avio_rl16(pb);
604 if (!value_type && value_len % 2)
606 /* My sample has that stream set to 0 maybe that mean the container.
607 * ASF stream count starts at 1. I am using 0 to the container value
608 * since it's unused. */
609 if (!strcmp(name, "AspectRatioX"))
610 asf->dar[0].num = get_value(s->pb, value_type, 32);
611 else if (!strcmp(name, "AspectRatioY"))
612 asf->dar[0].den = get_value(s->pb, value_type, 32);
614 get_tag(s, name, value_type, value_len, 32);
620 static int asf_read_language_list(AVFormatContext *s, int64_t size)
622 AVIOContext *pb = s->pb;
623 ASFContext *asf = s->priv_data;
625 int stream_count = avio_rl16(pb);
626 for (j = 0; j < stream_count; j++) {
628 unsigned int lang_len = avio_r8(pb);
629 if ((ret = avio_get_str16le(pb, lang_len, lang,
630 sizeof(lang))) < lang_len)
631 avio_skip(pb, lang_len - ret);
633 av_strlcpy(asf->stream_languages[j], lang,
634 sizeof(*asf->stream_languages));
640 static int asf_read_metadata(AVFormatContext *s, int64_t size)
642 AVIOContext *pb = s->pb;
643 ASFContext *asf = s->priv_data;
644 int n, stream_num, name_len, value_len;
648 for (i = 0; i < n; i++) {
652 avio_rl16(pb); // lang_list_index
653 stream_num = avio_rl16(pb);
654 name_len = avio_rl16(pb);
655 value_type = avio_rl16(pb); /* value_type */
656 value_len = avio_rl32(pb);
658 if ((ret = avio_get_str16le(pb, name_len, name, sizeof(name))) < name_len)
659 avio_skip(pb, name_len - ret);
660 av_dlog(s, "%d stream %d name_len %2d type %d len %4d <%s>\n",
661 i, stream_num, name_len, value_type, value_len, name);
663 if (!strcmp(name, "AspectRatioX")){
664 int aspect_x = get_value(s->pb, value_type, 16);
666 asf->dar[stream_num].num = aspect_x;
667 } else if(!strcmp(name, "AspectRatioY")){
668 int aspect_y = get_value(s->pb, value_type, 16);
670 asf->dar[stream_num].den = aspect_y;
672 get_tag(s, name, value_type, value_len, 16);
679 static int asf_read_marker(AVFormatContext *s, int64_t size)
681 AVIOContext *pb = s->pb;
682 int i, count, name_len, ret;
685 avio_rl64(pb); // reserved 16 bytes
686 avio_rl64(pb); // ...
687 count = avio_rl32(pb); // markers count
688 avio_rl16(pb); // reserved 2 bytes
689 name_len = avio_rl16(pb); // name length
690 for (i = 0; i < name_len; i++)
691 avio_r8(pb); // skip the name
693 for (i = 0; i < count; i++) {
697 avio_rl64(pb); // offset, 8 bytes
698 pres_time = avio_rl64(pb); // presentation time
699 avio_rl16(pb); // entry length
700 avio_rl32(pb); // send time
701 avio_rl32(pb); // flags
702 name_len = avio_rl32(pb); // name length
703 if ((ret = avio_get_str16le(pb, name_len * 2, name,
704 sizeof(name))) < name_len)
705 avio_skip(pb, name_len - ret);
706 avpriv_new_chapter(s, i, (AVRational) { 1, 10000000 }, pres_time,
707 AV_NOPTS_VALUE, name);
713 static int asf_read_header(AVFormatContext *s)
715 ASFContext *asf = s->priv_data;
717 AVIOContext *pb = s->pb;
722 if (ff_guidcmp(&g, &ff_asf_header))
728 memset(&asf->asfid2avid, -1, sizeof(asf->asfid2avid));
730 uint64_t gpos = avio_tell(pb);
732 gsize = avio_rl64(pb);
734 if (!ff_guidcmp(&g, &ff_asf_data_header)) {
735 asf->data_object_offset = avio_tell(pb);
736 /* If not streaming, gsize is not unlimited (how?),
737 * and there is enough space in the file.. */
738 if (!(asf->hdr.flags & 0x01) && gsize >= 100)
739 asf->data_object_size = gsize - 24;
741 asf->data_object_size = (uint64_t)-1;
746 if (!ff_guidcmp(&g, &ff_asf_file_header)) {
747 int ret = asf_read_file_properties(s, gsize);
750 } else if (!ff_guidcmp(&g, &ff_asf_stream_header)) {
751 asf_read_stream_properties(s, gsize);
752 } else if (!ff_guidcmp(&g, &ff_asf_comment_header)) {
753 asf_read_content_desc(s, gsize);
754 } else if (!ff_guidcmp(&g, &ff_asf_language_guid)) {
755 asf_read_language_list(s, gsize);
756 } else if (!ff_guidcmp(&g, &ff_asf_extended_content_header)) {
757 asf_read_ext_content_desc(s, gsize);
758 } else if (!ff_guidcmp(&g, &ff_asf_metadata_header)) {
759 asf_read_metadata(s, gsize);
760 } else if (!ff_guidcmp(&g, &ff_asf_metadata_library_header)) {
761 asf_read_metadata(s, gsize);
762 } else if (!ff_guidcmp(&g, &ff_asf_ext_stream_header)) {
763 asf_read_ext_stream_properties(s, gsize);
765 // there could be a optional stream properties object to follow
766 // if so the next iteration will pick it up
768 } else if (!ff_guidcmp(&g, &ff_asf_head1_guid)) {
772 } else if (!ff_guidcmp(&g, &ff_asf_marker_header)) {
773 asf_read_marker(s, gsize);
774 } else if (pb->eof_reached) {
778 if (!ff_guidcmp(&g, &ff_asf_content_encryption)) {
779 av_log(s, AV_LOG_WARNING,
780 "DRM protected stream detected, decoding will likely fail!\n");
781 } else if (!ff_guidcmp(&g, &ff_asf_ext_content_encryption)) {
782 av_log(s, AV_LOG_WARNING,
783 "Ext DRM protected stream detected, decoding will likely fail!\n");
784 } else if (!ff_guidcmp(&g, &ff_asf_digital_signature)) {
785 av_log(s, AV_LOG_WARNING,
786 "Digital signature detected, decoding will likely fail!\n");
790 if (avio_tell(pb) != gpos + gsize)
791 av_log(s, AV_LOG_DEBUG,
792 "gpos mismatch our pos=%"PRIu64", end=%"PRId64"\n",
793 avio_tell(pb) - gpos, gsize);
794 avio_seek(pb, gpos + gsize, SEEK_SET);
802 asf->data_offset = avio_tell(pb);
803 asf->packet_size_left = 0;
805 for (i = 0; i < 128; i++) {
806 int stream_num = asf->asfid2avid[i];
807 if (stream_num >= 0) {
808 AVStream *st = s->streams[stream_num];
809 if (!st->codec->bit_rate)
810 st->codec->bit_rate = asf->stream_bitrates[i];
811 if (asf->dar[i].num > 0 && asf->dar[i].den > 0) {
812 av_reduce(&st->sample_aspect_ratio.num,
813 &st->sample_aspect_ratio.den,
814 asf->dar[i].num, asf->dar[i].den, INT_MAX);
815 } else if ((asf->dar[0].num > 0) && (asf->dar[0].den > 0) &&
816 // Use ASF container value if the stream doesn't set AR.
817 (st->codec->codec_type == AVMEDIA_TYPE_VIDEO))
818 av_reduce(&st->sample_aspect_ratio.num,
819 &st->sample_aspect_ratio.den,
820 asf->dar[0].num, asf->dar[0].den, INT_MAX);
822 av_dlog(s, "i=%d, st->codec->codec_type:%d, asf->dar %d:%d sar=%d:%d\n",
823 i, st->codec->codec_type, asf->dar[i].num, asf->dar[i].den,
824 st->sample_aspect_ratio.num, st->sample_aspect_ratio.den);
826 // copy and convert language codes to the frontend
827 if (asf->streams[i].stream_language_index < 128) {
828 const char *rfc1766 = asf->stream_languages[asf->streams[i].stream_language_index];
829 if (rfc1766 && strlen(rfc1766) > 1) {
830 const char primary_tag[3] = { rfc1766[0], rfc1766[1], '\0' }; // ignore country code if any
831 const char *iso6392 = av_convert_lang_to(primary_tag,
832 AV_LANG_ISO639_2_BIBL);
834 av_dict_set(&st->metadata, "language", iso6392, 0);
840 ff_metadata_conv(&s->metadata, NULL, ff_asf_metadata_conv);
845 #define DO_2BITS(bits, var, defval) \
846 switch (bits & 3) { \
848 var = avio_rl32(pb); \
852 var = avio_rl16(pb); \
865 * Load a single ASF packet into the demuxer.
866 * @param s demux context
867 * @param pb context to read data from
868 * @return 0 on success, <0 on error
870 static int ff_asf_get_packet(AVFormatContext *s, AVIOContext *pb)
872 ASFContext *asf = s->priv_data;
873 uint32_t packet_length, padsize;
877 // if we do not know packet size, allow skipping up to 32 kB
879 if (asf->no_resync_search)
881 else if (s->packet_size > 0)
882 off = (avio_tell(pb) - s->data_offset) % s->packet_size + 3;
889 if (c == 0x82 && !d && !e)
894 /* This code allows handling of -EAGAIN at packet boundaries (i.e.
895 * if the packet sync code above triggers -EAGAIN). This does not
896 * imply complete -EAGAIN handling support at random positions in
898 if (pb->error == AVERROR(EAGAIN))
899 return AVERROR(EAGAIN);
900 if (!pb->eof_reached)
901 av_log(s, AV_LOG_ERROR,
902 "ff asf bad header %x at:%"PRId64"\n", c, avio_tell(pb));
904 if ((c & 0x8f) == 0x82) {
906 if (!pb->eof_reached)
907 av_log(s, AV_LOG_ERROR, "ff asf bad non zero\n");
913 } else if (!pb->eof_reached) {
914 avio_seek(pb, -1, SEEK_CUR); // FIXME
917 asf->packet_flags = c;
918 asf->packet_property = d;
920 DO_2BITS(asf->packet_flags >> 5, packet_length, s->packet_size);
921 DO_2BITS(asf->packet_flags >> 1, padsize, 0); // sequence ignored
922 DO_2BITS(asf->packet_flags >> 3, padsize, 0); // padding length
924 // the following checks prevent overflows and infinite loops
925 if (!packet_length || packet_length >= (1U << 29)) {
926 av_log(s, AV_LOG_ERROR,
927 "invalid packet_length %d at:%"PRId64"\n",
928 packet_length, avio_tell(pb));
931 if (padsize >= packet_length) {
932 av_log(s, AV_LOG_ERROR,
933 "invalid padsize %d at:%"PRId64"\n", padsize, avio_tell(pb));
937 asf->packet_timestamp = avio_rl32(pb);
938 avio_rl16(pb); /* duration */
939 // rsize has at least 11 bytes which have to be present
941 if (asf->packet_flags & 0x01) {
942 asf->packet_segsizetype = avio_r8(pb);
944 asf->packet_segments = asf->packet_segsizetype & 0x3f;
946 asf->packet_segments = 1;
947 asf->packet_segsizetype = 0x80;
949 if (rsize > packet_length - padsize) {
950 asf->packet_size_left = 0;
951 av_log(s, AV_LOG_ERROR,
952 "invalid packet header length %d for pktlen %d-%d at %"PRId64"\n",
953 rsize, packet_length, padsize, avio_tell(pb));
956 asf->packet_size_left = packet_length - padsize - rsize;
957 if (packet_length < asf->hdr.min_pktsize)
958 padsize += asf->hdr.min_pktsize - packet_length;
959 asf->packet_padsize = padsize;
960 av_dlog(s, "packet: size=%d padsize=%d left=%d\n",
961 s->packet_size, asf->packet_padsize, asf->packet_size_left);
967 * @return <0 if error
969 static int asf_read_frame_header(AVFormatContext *s, AVIOContext *pb)
971 ASFContext *asf = s->priv_data;
973 int num = avio_r8(pb);
976 asf->packet_segments--;
977 asf->packet_key_frame = num >> 7;
978 asf->stream_index = asf->asfid2avid[num & 0x7f];
979 // sequence should be ignored!
980 DO_2BITS(asf->packet_property >> 4, asf->packet_seq, 0);
981 DO_2BITS(asf->packet_property >> 2, asf->packet_frag_offset, 0);
982 DO_2BITS(asf->packet_property, asf->packet_replic_size, 0);
983 av_dlog(asf, "key:%d stream:%d seq:%d offset:%d replic_size:%d\n",
984 asf->packet_key_frame, asf->stream_index, asf->packet_seq,
985 asf->packet_frag_offset, asf->packet_replic_size);
986 if (asf->packet_replic_size >= 8) {
987 asf->packet_obj_size = avio_rl32(pb);
988 if (asf->packet_obj_size >= (1 << 24) || asf->packet_obj_size <= 0) {
989 av_log(s, AV_LOG_ERROR, "packet_obj_size invalid\n");
992 asf->packet_frag_timestamp = avio_rl32(pb); // timestamp
993 if (asf->packet_replic_size >= 8 + 38 + 4) {
999 avio_skip(pb, asf->packet_replic_size - 8 - 38 - 4);
1001 asf->packet_frag_timestamp = ts0 / 10000;
1003 asf->packet_frag_timestamp = AV_NOPTS_VALUE;
1005 avio_skip(pb, asf->packet_replic_size - 8);
1006 rsize += asf->packet_replic_size; // FIXME - check validity
1007 } else if (asf->packet_replic_size == 1) {
1008 // multipacket - frag_offset is beginning timestamp
1009 asf->packet_time_start = asf->packet_frag_offset;
1010 asf->packet_frag_offset = 0;
1011 asf->packet_frag_timestamp = asf->packet_timestamp;
1013 asf->packet_time_delta = avio_r8(pb);
1015 } else if (asf->packet_replic_size != 0) {
1016 av_log(s, AV_LOG_ERROR, "unexpected packet_replic_size of %d\n",
1017 asf->packet_replic_size);
1020 if (asf->packet_flags & 0x01) {
1021 DO_2BITS(asf->packet_segsizetype >> 6, asf->packet_frag_size, 0); // 0 is illegal
1022 if (rsize > asf->packet_size_left) {
1023 av_log(s, AV_LOG_ERROR, "packet_replic_size is invalid\n");
1025 } else if (asf->packet_frag_size > asf->packet_size_left - rsize) {
1026 if (asf->packet_frag_size > asf->packet_size_left - rsize + asf->packet_padsize) {
1027 av_log(s, AV_LOG_ERROR, "packet_frag_size is invalid (%d-%d)\n",
1028 asf->packet_size_left, rsize);
1031 int diff = asf->packet_frag_size - (asf->packet_size_left - rsize);
1032 asf->packet_size_left += diff;
1033 asf->packet_padsize -= diff;
1037 if (rsize > asf->packet_size_left) {
1038 av_log(s, AV_LOG_ERROR, "packet_replic_size is invalid\n");
1041 asf->packet_frag_size = asf->packet_size_left - rsize;
1043 if (asf->packet_replic_size == 1) {
1044 asf->packet_multi_size = asf->packet_frag_size;
1045 if (asf->packet_multi_size > asf->packet_size_left)
1048 asf->packet_size_left -= rsize;
1054 * Parse data from individual ASF packets (which were previously loaded
1055 * with asf_get_packet()).
1056 * @param s demux context
1057 * @param pb context to read data from
1058 * @param pkt pointer to store packet data into
1059 * @return 0 if data was stored in pkt, <0 on error or 1 if more ASF
1060 * packets need to be loaded (through asf_get_packet())
1062 static int ff_asf_parse_packet(AVFormatContext *s, AVIOContext *pb, AVPacket *pkt)
1064 ASFContext *asf = s->priv_data;
1065 ASFStream *asf_st = 0;
1069 if (pb->eof_reached)
1072 if (asf->packet_size_left < FRAME_HEADER_SIZE ||
1073 asf->packet_segments < 1) {
1074 int ret = asf->packet_size_left + asf->packet_padsize;
1080 asf->packet_pos = avio_tell(pb);
1081 if (asf->data_object_size != (uint64_t)-1 &&
1082 (asf->packet_pos - asf->data_object_offset >= asf->data_object_size))
1083 return AVERROR_EOF; /* Do not exceed the size of the data object */
1086 if (asf->packet_time_start == 0) {
1087 if (asf_read_frame_header(s, pb) < 0) {
1088 asf->packet_segments = 0;
1091 if (asf->stream_index < 0 ||
1092 s->streams[asf->stream_index]->discard >= AVDISCARD_ALL ||
1093 (!asf->packet_key_frame &&
1094 s->streams[asf->stream_index]->discard >= AVDISCARD_NONKEY)) {
1095 asf->packet_time_start = 0;
1096 /* unhandled packet (should not happen) */
1097 avio_skip(pb, asf->packet_frag_size);
1098 asf->packet_size_left -= asf->packet_frag_size;
1099 if (asf->stream_index < 0)
1100 av_log(s, AV_LOG_ERROR, "ff asf skip %d (unknown stream)\n",
1101 asf->packet_frag_size);
1104 asf->asf_st = s->streams[asf->stream_index]->priv_data;
1106 asf_st = asf->asf_st;
1109 if (asf->packet_replic_size == 1) {
1110 // frag_offset is here used as the beginning timestamp
1111 asf->packet_frag_timestamp = asf->packet_time_start;
1112 asf->packet_time_start += asf->packet_time_delta;
1113 asf->packet_obj_size = asf->packet_frag_size = avio_r8(pb);
1114 asf->packet_size_left--;
1115 asf->packet_multi_size--;
1116 if (asf->packet_multi_size < asf->packet_obj_size) {
1117 asf->packet_time_start = 0;
1118 avio_skip(pb, asf->packet_multi_size);
1119 asf->packet_size_left -= asf->packet_multi_size;
1122 asf->packet_multi_size -= asf->packet_obj_size;
1124 if (asf_st->frag_offset + asf->packet_frag_size <= asf_st->pkt.size &&
1125 asf_st->frag_offset + asf->packet_frag_size > asf->packet_obj_size) {
1126 av_log(s, AV_LOG_INFO, "ignoring invalid packet_obj_size (%d %d %d %d)\n",
1127 asf_st->frag_offset, asf->packet_frag_size,
1128 asf->packet_obj_size, asf_st->pkt.size);
1129 asf->packet_obj_size = asf_st->pkt.size;
1132 if (asf_st->pkt.size != asf->packet_obj_size ||
1133 // FIXME is this condition sufficient?
1134 asf_st->frag_offset + asf->packet_frag_size > asf_st->pkt.size) {
1135 if (asf_st->pkt.data) {
1136 av_log(s, AV_LOG_INFO,
1137 "freeing incomplete packet size %d, new %d\n",
1138 asf_st->pkt.size, asf->packet_obj_size);
1139 asf_st->frag_offset = 0;
1140 av_free_packet(&asf_st->pkt);
1143 av_new_packet(&asf_st->pkt, asf->packet_obj_size);
1144 asf_st->seq = asf->packet_seq;
1145 asf_st->pkt.dts = asf->packet_frag_timestamp - asf->hdr.preroll;
1146 asf_st->pkt.stream_index = asf->stream_index;
1147 asf_st->pkt.pos = asf_st->packet_pos = asf->packet_pos;
1149 if (asf_st->pkt.data && asf_st->palette_changed) {
1151 pal = av_packet_new_side_data(&asf_st->pkt, AV_PKT_DATA_PALETTE,
1154 av_log(s, AV_LOG_ERROR, "Cannot append palette to packet\n");
1156 memcpy(pal, asf_st->palette, AVPALETTE_SIZE);
1157 asf_st->palette_changed = 0;
1160 av_dlog(asf, "new packet: stream:%d key:%d packet_key:%d audio:%d size:%d\n",
1161 asf->stream_index, asf->packet_key_frame,
1162 asf_st->pkt.flags & AV_PKT_FLAG_KEY,
1163 s->streams[asf->stream_index]->codec->codec_type == AVMEDIA_TYPE_AUDIO,
1164 asf->packet_obj_size);
1165 if (s->streams[asf->stream_index]->codec->codec_type == AVMEDIA_TYPE_AUDIO)
1166 asf->packet_key_frame = 1;
1167 if (asf->packet_key_frame)
1168 asf_st->pkt.flags |= AV_PKT_FLAG_KEY;
1172 av_dlog(asf, "READ PACKET s:%d os:%d o:%d,%d l:%d DATA:%p\n",
1173 s->packet_size, asf_st->pkt.size, asf->packet_frag_offset,
1174 asf_st->frag_offset, asf->packet_frag_size, asf_st->pkt.data);
1175 asf->packet_size_left -= asf->packet_frag_size;
1176 if (asf->packet_size_left < 0)
1179 if (asf->packet_frag_offset >= asf_st->pkt.size ||
1180 asf->packet_frag_size > asf_st->pkt.size - asf->packet_frag_offset) {
1181 av_log(s, AV_LOG_ERROR,
1182 "packet fragment position invalid %u,%u not in %u\n",
1183 asf->packet_frag_offset, asf->packet_frag_size,
1188 ret = avio_read(pb, asf_st->pkt.data + asf->packet_frag_offset,
1189 asf->packet_frag_size);
1190 if (ret != asf->packet_frag_size) {
1191 if (ret < 0 || asf->packet_frag_offset + ret == 0)
1192 return ret < 0 ? ret : AVERROR_EOF;
1194 if (asf_st->ds_span > 1) {
1195 // scrambling, we can either drop it completely or fill the remainder
1196 // TODO: should we fill the whole packet instead of just the current
1198 memset(asf_st->pkt.data + asf->packet_frag_offset + ret, 0,
1199 asf->packet_frag_size - ret);
1200 ret = asf->packet_frag_size;
1202 // no scrambling, so we can return partial packets
1203 av_shrink_packet(&asf_st->pkt, asf->packet_frag_offset + ret);
1206 if (s->key && s->keylen == 20)
1207 ff_asfcrypt_dec(s->key, asf_st->pkt.data + asf->packet_frag_offset,
1209 asf_st->frag_offset += ret;
1210 /* test if whole packet is read */
1211 if (asf_st->frag_offset == asf_st->pkt.size) {
1212 // workaround for macroshit radio DVR-MS files
1213 if (s->streams[asf->stream_index]->codec->codec_id == AV_CODEC_ID_MPEG2VIDEO &&
1214 asf_st->pkt.size > 100) {
1216 for (i = 0; i < asf_st->pkt.size && !asf_st->pkt.data[i]; i++)
1218 if (i == asf_st->pkt.size) {
1219 av_log(s, AV_LOG_DEBUG, "discarding ms fart\n");
1220 asf_st->frag_offset = 0;
1221 av_free_packet(&asf_st->pkt);
1227 if (asf_st->ds_span > 1) {
1228 if (asf_st->pkt.size != asf_st->ds_packet_size * asf_st->ds_span) {
1229 av_log(s, AV_LOG_ERROR,
1230 "pkt.size != ds_packet_size * ds_span (%d %d %d)\n",
1231 asf_st->pkt.size, asf_st->ds_packet_size,
1234 /* packet descrambling */
1235 AVBufferRef *buf = av_buffer_alloc(asf_st->pkt.size +
1236 FF_INPUT_BUFFER_PADDING_SIZE);
1238 uint8_t *newdata = buf->data;
1240 memset(newdata + asf_st->pkt.size, 0,
1241 FF_INPUT_BUFFER_PADDING_SIZE);
1242 while (offset < asf_st->pkt.size) {
1243 int off = offset / asf_st->ds_chunk_size;
1244 int row = off / asf_st->ds_span;
1245 int col = off % asf_st->ds_span;
1246 int idx = row + col * asf_st->ds_packet_size / asf_st->ds_chunk_size;
1247 assert(offset + asf_st->ds_chunk_size <= asf_st->pkt.size);
1248 assert(idx + 1 <= asf_st->pkt.size / asf_st->ds_chunk_size);
1249 memcpy(newdata + offset,
1250 asf_st->pkt.data + idx * asf_st->ds_chunk_size,
1251 asf_st->ds_chunk_size);
1252 offset += asf_st->ds_chunk_size;
1254 av_buffer_unref(&asf_st->pkt.buf);
1255 asf_st->pkt.buf = buf;
1256 asf_st->pkt.data = buf->data;
1260 asf_st->frag_offset = 0;
1262 #if FF_API_DESTRUCT_PACKET
1263 asf_st->pkt.destruct = NULL;
1265 asf_st->pkt.buf = 0;
1266 asf_st->pkt.size = 0;
1267 asf_st->pkt.data = 0;
1268 asf_st->pkt.side_data_elems = 0;
1269 asf_st->pkt.side_data = NULL;
1270 break; // packet completed
1276 static int asf_read_packet(AVFormatContext *s, AVPacket *pkt)
1278 ASFContext *asf = s->priv_data;
1283 /* parse cached packets, if any */
1284 if ((ret = ff_asf_parse_packet(s, s->pb, pkt)) <= 0)
1286 if ((ret = ff_asf_get_packet(s, s->pb)) < 0)
1287 assert(asf->packet_size_left < FRAME_HEADER_SIZE ||
1288 asf->packet_segments < 1);
1289 asf->packet_time_start = 0;
1293 // Added to support seeking after packets have been read
1294 // If information is not reset, read_packet fails due to
1295 // leftover information from previous reads
1296 static void asf_reset_header(AVFormatContext *s)
1298 ASFContext *asf = s->priv_data;
1302 asf->packet_size_left = 0;
1303 asf->packet_segments = 0;
1304 asf->packet_flags = 0;
1305 asf->packet_property = 0;
1306 asf->packet_timestamp = 0;
1307 asf->packet_segsizetype = 0;
1308 asf->packet_segments = 0;
1309 asf->packet_seq = 0;
1310 asf->packet_replic_size = 0;
1311 asf->packet_key_frame = 0;
1312 asf->packet_padsize = 0;
1313 asf->packet_frag_offset = 0;
1314 asf->packet_frag_size = 0;
1315 asf->packet_frag_timestamp = 0;
1316 asf->packet_multi_size = 0;
1317 asf->packet_obj_size = 0;
1318 asf->packet_time_delta = 0;
1319 asf->packet_time_start = 0;
1321 for (i = 0; i < s->nb_streams; i++) {
1322 asf_st = s->streams[i]->priv_data;
1325 av_free_packet(&asf_st->pkt);
1326 asf_st->frag_offset = 0;
1332 static int asf_read_close(AVFormatContext *s)
1334 asf_reset_header(s);
1339 static int64_t asf_read_pts(AVFormatContext *s, int stream_index,
1340 int64_t *ppos, int64_t pos_limit)
1342 AVPacket pkt1, *pkt = &pkt1;
1345 int64_t pos = *ppos;
1347 int64_t start_pos[ASF_MAX_STREAMS];
1349 for (i = 0; i < s->nb_streams; i++)
1352 if (s->packet_size > 0)
1353 pos = (pos + s->packet_size - 1 - s->data_offset) /
1354 s->packet_size * s->packet_size +
1357 avio_seek(s->pb, pos, SEEK_SET);
1359 asf_reset_header(s);
1361 if (asf_read_packet(s, pkt) < 0) {
1362 av_log(s, AV_LOG_INFO, "asf_read_pts failed\n");
1363 return AV_NOPTS_VALUE;
1368 av_free_packet(pkt);
1369 if (pkt->flags & AV_PKT_FLAG_KEY) {
1370 i = pkt->stream_index;
1372 asf_st = s->streams[i]->priv_data;
1375 // assert((asf_st->packet_pos - s->data_offset) % s->packet_size == 0);
1376 pos = asf_st->packet_pos;
1378 av_add_index_entry(s->streams[i], pos, pts, pkt->size,
1379 pos - start_pos[i] + 1, AVINDEX_KEYFRAME);
1380 start_pos[i] = asf_st->packet_pos + 1;
1382 if (pkt->stream_index == stream_index)
1391 static void asf_build_simple_index(AVFormatContext *s, int stream_index)
1394 ASFContext *asf = s->priv_data;
1395 int64_t current_pos = avio_tell(s->pb);
1398 avio_seek(s->pb, asf->data_object_offset + asf->data_object_size, SEEK_SET);
1399 ff_get_guid(s->pb, &g);
1401 /* the data object can be followed by other top-level objects,
1402 * skip them until the simple index object is reached */
1403 while (ff_guidcmp(&g, &index_guid)) {
1404 int64_t gsize = avio_rl64(s->pb);
1405 if (gsize < 24 || s->pb->eof_reached) {
1406 avio_seek(s->pb, current_pos, SEEK_SET);
1409 avio_skip(s->pb, gsize - 24);
1410 ff_get_guid(s->pb, &g);
1414 int64_t itime, last_pos = -1;
1416 int64_t av_unused gsize = avio_rl64(s->pb);
1417 ff_get_guid(s->pb, &g);
1418 itime = avio_rl64(s->pb);
1419 pct = avio_rl32(s->pb);
1420 ict = avio_rl32(s->pb);
1421 av_log(s, AV_LOG_DEBUG,
1422 "itime:0x%"PRIx64", pct:%d, ict:%d\n", itime, pct, ict);
1424 for (i = 0; i < ict; i++) {
1425 int pktnum = avio_rl32(s->pb);
1426 int pktct = avio_rl16(s->pb);
1427 int64_t pos = s->data_offset + s->packet_size * (int64_t)pktnum;
1428 int64_t index_pts = FFMAX(av_rescale(itime, i, 10000) - asf->hdr.preroll, 0);
1430 if (pos != last_pos) {
1431 av_log(s, AV_LOG_DEBUG, "pktnum:%d, pktct:%d pts: %"PRId64"\n",
1432 pktnum, pktct, index_pts);
1433 av_add_index_entry(s->streams[stream_index], pos, index_pts,
1434 s->packet_size, 0, AVINDEX_KEYFRAME);
1438 asf->index_read = ict > 0;
1440 avio_seek(s->pb, current_pos, SEEK_SET);
1443 static int asf_read_seek(AVFormatContext *s, int stream_index,
1444 int64_t pts, int flags)
1446 ASFContext *asf = s->priv_data;
1447 AVStream *st = s->streams[stream_index];
1451 if (s->packet_size <= 0)
1454 /* Try using the protocol's read_seek if available */
1456 int ret = avio_seek_time(s->pb, stream_index, pts, flags);
1458 asf_reset_header(s);
1459 if (ret != AVERROR(ENOSYS))
1463 if (!asf->index_read)
1464 asf_build_simple_index(s, stream_index);
1466 if ((asf->index_read && st->index_entries)) {
1467 index = av_index_search_timestamp(st, pts, flags);
1469 /* find the position */
1470 pos = st->index_entries[index].pos;
1473 av_log(s, AV_LOG_DEBUG, "SEEKTO: %"PRId64"\n", pos);
1474 avio_seek(s->pb, pos, SEEK_SET);
1475 asf_reset_header(s);
1479 /* no index or seeking by index failed */
1480 if (ff_seek_frame_binary(s, stream_index, pts, flags) < 0)
1482 asf_reset_header(s);
1486 AVInputFormat ff_asf_demuxer = {
1488 .long_name = NULL_IF_CONFIG_SMALL("ASF (Advanced / Active Streaming Format)"),
1489 .priv_data_size = sizeof(ASFContext),
1490 .read_probe = asf_probe,
1491 .read_header = asf_read_header,
1492 .read_packet = asf_read_packet,
1493 .read_close = asf_read_close,
1494 .read_seek = asf_read_seek,
1495 .read_timestamp = asf_read_pts,
1496 .flags = AVFMT_NOBINSEARCH | AVFMT_NOGENSEARCH,
1497 .priv_class = &asf_class,