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/avstring.h"
26 #include "libavutil/bswap.h"
27 #include "libavutil/common.h"
28 #include "libavutil/dict.h"
29 #include "libavutil/mathematics.h"
30 #include "libavutil/opt.h"
32 #include "avio_internal.h"
33 #include "avlanguage.h"
42 int asfid2avid[128]; ///< conversion table from asf ID 2 AVStream ID
43 ASFStream streams[128]; ///< it's max number and it's not that big
44 uint32_t stream_bitrates[128]; ///< max number of streams, bitrate for each (for streaming)
46 char stream_languages[128][6]; ///< max number of streams, language for each (RFC1766, e.g. en-US)
47 /* non streamed additonnal info */
50 /* only for reading */
51 uint64_t data_offset; ///< beginning of the first data packet
52 uint64_t data_object_offset; ///< data object offset (excl. GUID & size)
53 uint64_t data_object_size; ///< size of the data object
61 int packet_segsizetype;
64 int packet_replic_size;
67 unsigned int packet_frag_offset;
68 unsigned int packet_frag_size;
69 int64_t packet_frag_timestamp;
70 int packet_multi_size;
72 int packet_time_delta;
73 int packet_time_start;
78 ASFStream *asf_st; ///< currently decoded stream
83 static const AVOption options[] = {
84 { "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 },
88 static const AVClass asf_class = {
89 .class_name = "asf demuxer",
90 .item_name = av_default_item_name,
92 .version = LIBAVUTIL_VERSION_INT,
98 #define ASF_MAX_STREAMS 127
99 #define FRAME_HEADER_SIZE 17
100 // Fix Me! FRAME_HEADER_SIZE may be different.
102 static const ff_asf_guid index_guid = {
103 0x90, 0x08, 0x00, 0x33, 0xb1, 0xe5, 0xcf, 0x11, 0x89, 0xf4, 0x00, 0xa0, 0xc9, 0x03, 0x49, 0xcb
107 static const ff_asf_guid stream_bitrate_guid = { /* (http://get.to/sdp) */
108 0xce, 0x75, 0xf8, 0x7b, 0x8d, 0x46, 0xd1, 0x11, 0x8d, 0x82, 0x00, 0x60, 0x97, 0xc9, 0xa2, 0xb2
111 #define PRINT_IF_GUID(g, cmp) \
112 if (!ff_guidcmp(g, &cmp)) \
113 av_dlog(NULL, "(GUID: %s) ", # cmp)
115 static void print_guid(ff_asf_guid *g)
118 PRINT_IF_GUID(g, ff_asf_header);
119 else PRINT_IF_GUID(g, ff_asf_file_header);
120 else PRINT_IF_GUID(g, ff_asf_stream_header);
121 else PRINT_IF_GUID(g, ff_asf_audio_stream);
122 else PRINT_IF_GUID(g, ff_asf_audio_conceal_none);
123 else PRINT_IF_GUID(g, ff_asf_video_stream);
124 else PRINT_IF_GUID(g, ff_asf_video_conceal_none);
125 else PRINT_IF_GUID(g, ff_asf_command_stream);
126 else PRINT_IF_GUID(g, ff_asf_comment_header);
127 else PRINT_IF_GUID(g, ff_asf_codec_comment_header);
128 else PRINT_IF_GUID(g, ff_asf_codec_comment1_header);
129 else PRINT_IF_GUID(g, ff_asf_data_header);
130 else PRINT_IF_GUID(g, index_guid);
131 else PRINT_IF_GUID(g, ff_asf_head1_guid);
132 else PRINT_IF_GUID(g, ff_asf_head2_guid);
133 else PRINT_IF_GUID(g, ff_asf_my_guid);
134 else PRINT_IF_GUID(g, ff_asf_ext_stream_header);
135 else PRINT_IF_GUID(g, ff_asf_extended_content_header);
136 else PRINT_IF_GUID(g, ff_asf_ext_stream_embed_stream_header);
137 else PRINT_IF_GUID(g, ff_asf_ext_stream_audio_stream);
138 else PRINT_IF_GUID(g, ff_asf_metadata_header);
139 else PRINT_IF_GUID(g, ff_asf_metadata_library_header);
140 else PRINT_IF_GUID(g, ff_asf_marker_header);
141 else PRINT_IF_GUID(g, stream_bitrate_guid);
142 else PRINT_IF_GUID(g, ff_asf_language_guid);
144 av_dlog(NULL, "(GUID: unknown) ");
145 for (i = 0; i < 16; i++)
146 av_dlog(NULL, " 0x%02x,", (*g)[i]);
147 av_dlog(NULL, "}\n");
151 #define print_guid(g)
154 void ff_get_guid(AVIOContext *s, ff_asf_guid *g)
156 assert(sizeof(*g) == 16);
157 avio_read(s, *g, sizeof(*g));
160 static int asf_probe(AVProbeData *pd)
162 /* check file header */
163 if (!ff_guidcmp(pd->buf, &ff_asf_header))
164 return AVPROBE_SCORE_MAX;
169 /* size of type 2 (BOOL) is 32bit for "Extended Content Description Object"
170 * but 16 bit for "Metadata Object" and "Metadata Library Object" */
171 static int get_value(AVIOContext *pb, int type, int type2_size)
175 return (type2_size == 32) ? avio_rl32(pb) : avio_rl16(pb);
177 return avio_rl32(pb);
179 return avio_rl64(pb);
181 return avio_rl16(pb);
187 /* MSDN claims that this should be "compatible with the ID3 frame, APIC",
188 * but in reality this is only loosely similar */
189 static int asf_read_picture(AVFormatContext *s, int len)
191 AVPacket pkt = { 0 };
192 const CodecMime *mime = ff_id3v2_mime_tags;
193 enum AVCodecID id = AV_CODEC_ID_NONE;
195 uint8_t *desc = NULL;
196 ASFStream *ast = 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);
251 ast = av_mallocz(sizeof(*ast));
253 ret = AVERROR(ENOMEM);
257 st->disposition |= AV_DISPOSITION_ATTACHED_PIC;
258 st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
259 st->codec->codec_id = id;
260 st->attached_pic = pkt;
261 st->attached_pic.stream_index = st->index;
262 st->attached_pic.flags |= AV_PKT_FLAG_KEY;
265 av_dict_set(&st->metadata, "title", desc, AV_DICT_DONT_STRDUP_VAL);
269 av_dict_set(&st->metadata, "comment", ff_id3v2_picture_types[type], 0);
276 av_free_packet(&pkt);
280 static void get_id3_tag(AVFormatContext *s, int len)
282 ID3v2ExtraMeta *id3v2_extra_meta = NULL;
284 ff_id3v2_read(s, ID3v2_DEFAULT_MAGIC, &id3v2_extra_meta);
285 if (id3v2_extra_meta)
286 ff_id3v2_parse_apic(s, &id3v2_extra_meta);
287 ff_id3v2_free_extra_meta(&id3v2_extra_meta);
290 static void get_tag(AVFormatContext *s, const char *key, int type, int len, int type2_size)
293 int64_t off = avio_tell(s->pb);
295 if ((unsigned)len >= (UINT_MAX - 1) / 2)
298 value = av_malloc(2 * len + 1);
302 if (type == 0) { // UTF16-LE
303 avio_get_str16le(s->pb, len, value, 2 * len + 1);
304 } else if (type == 1) { // byte array
305 if (!strcmp(key, "WM/Picture")) { // handle cover art
306 asf_read_picture(s, len);
307 } else if (!strcmp(key, "ID3")) { // handle ID3 tag
310 av_log(s, AV_LOG_VERBOSE, "Unsupported byte array in tag %s.\n", key);
313 } else if (type > 1 && type <= 5) { // boolean or DWORD or QWORD or WORD
314 uint64_t num = get_value(s->pb, type, type2_size);
315 snprintf(value, len, "%"PRIu64, num);
316 } else if (type == 6) { // (don't) handle GUID
317 av_log(s, AV_LOG_DEBUG, "Unsupported GUID value in tag %s.\n", key);
320 av_log(s, AV_LOG_DEBUG,
321 "Unsupported value type %d in tag %s.\n", type, key);
325 av_dict_set(&s->metadata, key, value, 0);
329 avio_seek(s->pb, off + len, SEEK_SET);
332 static int asf_read_file_properties(AVFormatContext *s, int64_t size)
334 ASFContext *asf = s->priv_data;
335 AVIOContext *pb = s->pb;
337 ff_get_guid(pb, &asf->hdr.guid);
338 asf->hdr.file_size = avio_rl64(pb);
339 asf->hdr.create_time = avio_rl64(pb);
340 avio_rl64(pb); /* number of packets */
341 asf->hdr.play_time = avio_rl64(pb);
342 asf->hdr.send_time = avio_rl64(pb);
343 asf->hdr.preroll = avio_rl32(pb);
344 asf->hdr.ignore = avio_rl32(pb);
345 asf->hdr.flags = avio_rl32(pb);
346 asf->hdr.min_pktsize = avio_rl32(pb);
347 asf->hdr.max_pktsize = avio_rl32(pb);
348 if (asf->hdr.min_pktsize >= (1U << 29))
349 return AVERROR_INVALIDDATA;
350 asf->hdr.max_bitrate = avio_rl32(pb);
351 s->packet_size = asf->hdr.max_pktsize;
356 static int asf_read_stream_properties(AVFormatContext *s, int64_t size)
358 ASFContext *asf = s->priv_data;
359 AVIOContext *pb = s->pb;
363 enum AVMediaType type;
364 int type_specific_size, sizeX;
366 int64_t pos1, pos2, start_time;
367 int test_for_ext_stream_audio, is_dvr_ms_audio = 0;
369 if (s->nb_streams == ASF_MAX_STREAMS) {
370 av_log(s, AV_LOG_ERROR, "too many streams\n");
371 return AVERROR(EINVAL);
374 pos1 = avio_tell(pb);
376 st = avformat_new_stream(s, NULL);
378 return AVERROR(ENOMEM);
379 avpriv_set_pts_info(st, 32, 1, 1000); /* 32 bit pts in ms */
380 asf_st = av_mallocz(sizeof(ASFStream));
382 return AVERROR(ENOMEM);
383 st->priv_data = asf_st;
385 start_time = asf->hdr.preroll;
387 asf_st->stream_language_index = 128; // invalid stream index means no language info
389 if (!(asf->hdr.flags & 0x01)) { // if we aren't streaming...
390 st->duration = asf->hdr.play_time /
391 (10000000 / 1000) - start_time;
395 test_for_ext_stream_audio = 0;
396 if (!ff_guidcmp(&g, &ff_asf_audio_stream)) {
397 type = AVMEDIA_TYPE_AUDIO;
398 } else if (!ff_guidcmp(&g, &ff_asf_video_stream)) {
399 type = AVMEDIA_TYPE_VIDEO;
400 } else if (!ff_guidcmp(&g, &ff_asf_jfif_media)) {
401 type = AVMEDIA_TYPE_VIDEO;
402 st->codec->codec_id = AV_CODEC_ID_MJPEG;
403 } else if (!ff_guidcmp(&g, &ff_asf_command_stream)) {
404 type = AVMEDIA_TYPE_DATA;
405 } else if (!ff_guidcmp(&g, &ff_asf_ext_stream_embed_stream_header)) {
406 test_for_ext_stream_audio = 1;
407 type = AVMEDIA_TYPE_UNKNOWN;
412 avio_skip(pb, 8); /* total_size */
413 type_specific_size = avio_rl32(pb);
415 st->id = avio_rl16(pb) & 0x7f; /* stream id */
416 // mapping of asf ID to AV stream ID;
417 asf->asfid2avid[st->id] = s->nb_streams - 1;
421 if (test_for_ext_stream_audio) {
423 if (!ff_guidcmp(&g, &ff_asf_ext_stream_audio_stream)) {
424 type = AVMEDIA_TYPE_AUDIO;
435 st->codec->codec_type = type;
436 if (type == AVMEDIA_TYPE_AUDIO) {
437 int ret = ff_get_wav_header(pb, st->codec, type_specific_size);
440 if (is_dvr_ms_audio) {
441 // codec_id and codec_tag are unreliable in dvr_ms
442 // files. Set them later by probing stream.
443 st->codec->codec_id = AV_CODEC_ID_PROBE;
444 st->codec->codec_tag = 0;
446 if (st->codec->codec_id == AV_CODEC_ID_AAC)
447 st->need_parsing = AVSTREAM_PARSE_NONE;
449 st->need_parsing = AVSTREAM_PARSE_FULL;
450 /* We have to init the frame size at some point .... */
451 pos2 = avio_tell(pb);
452 if (size >= (pos2 + 8 - pos1 + 24)) {
453 asf_st->ds_span = avio_r8(pb);
454 asf_st->ds_packet_size = avio_rl16(pb);
455 asf_st->ds_chunk_size = avio_rl16(pb);
456 avio_rl16(pb); // ds_data_size
457 avio_r8(pb); // ds_silence_data
459 if (asf_st->ds_span > 1) {
460 if (!asf_st->ds_chunk_size ||
461 (asf_st->ds_packet_size / asf_st->ds_chunk_size <= 1) ||
462 asf_st->ds_packet_size % asf_st->ds_chunk_size)
463 asf_st->ds_span = 0; // disable descrambling
465 } else if (type == AVMEDIA_TYPE_VIDEO &&
466 size - (avio_tell(pb) - pos1 + 24) >= 51) {
470 avio_rl16(pb); /* size */
471 sizeX = avio_rl32(pb); /* size */
472 st->codec->width = avio_rl32(pb);
473 st->codec->height = avio_rl32(pb);
474 /* not available for asf */
475 avio_rl16(pb); /* panes */
476 st->codec->bits_per_coded_sample = avio_rl16(pb); /* depth */
477 tag1 = avio_rl32(pb);
480 st->codec->extradata_size = sizeX - 40;
481 st->codec->extradata = av_mallocz(st->codec->extradata_size +
482 FF_INPUT_BUFFER_PADDING_SIZE);
483 avio_read(pb, st->codec->extradata, st->codec->extradata_size);
486 /* Extract palette from extradata if bpp <= 8 */
487 /* This code assumes that extradata contains only palette */
488 /* This is true for all paletted codecs implemented in libavcodec */
489 if (st->codec->extradata_size && (st->codec->bits_per_coded_sample <= 8)) {
492 for (i = 0; i < FFMIN(st->codec->extradata_size, AVPALETTE_SIZE) / 4; i++)
493 asf_st->palette[i] = av_bswap32(((uint32_t *)st->codec->extradata)[i]);
495 memcpy(asf_st->palette, st->codec->extradata,
496 FFMIN(st->codec->extradata_size, AVPALETTE_SIZE));
498 asf_st->palette_changed = 1;
501 st->codec->codec_tag = tag1;
502 st->codec->codec_id = ff_codec_get_id(ff_codec_bmp_tags, tag1);
503 if (tag1 == MKTAG('D', 'V', 'R', ' ')) {
504 st->need_parsing = AVSTREAM_PARSE_FULL;
505 /* issue658 contains wrong w/h and MS even puts a fake seq header
506 * with wrong w/h in extradata while a correct one is in the stream.
507 * maximum lameness */
509 st->codec->height = 0;
510 av_freep(&st->codec->extradata);
511 st->codec->extradata_size = 0;
513 if (st->codec->codec_id == AV_CODEC_ID_H264)
514 st->need_parsing = AVSTREAM_PARSE_FULL_ONCE;
516 pos2 = avio_tell(pb);
517 avio_skip(pb, size - (pos2 - pos1 + 24));
522 static int asf_read_ext_stream_properties(AVFormatContext *s, int64_t size)
524 ASFContext *asf = s->priv_data;
525 AVIOContext *pb = s->pb;
527 int ext_len, payload_ext_ct, stream_ct, i;
528 uint32_t leak_rate, stream_num;
529 unsigned int stream_languageid_index;
531 avio_rl64(pb); // starttime
532 avio_rl64(pb); // endtime
533 leak_rate = avio_rl32(pb); // leak-datarate
534 avio_rl32(pb); // bucket-datasize
535 avio_rl32(pb); // init-bucket-fullness
536 avio_rl32(pb); // alt-leak-datarate
537 avio_rl32(pb); // alt-bucket-datasize
538 avio_rl32(pb); // alt-init-bucket-fullness
539 avio_rl32(pb); // max-object-size
540 avio_rl32(pb); // flags (reliable,seekable,no_cleanpoints?,resend-live-cleanpoints, rest of bits reserved)
541 stream_num = avio_rl16(pb); // stream-num
543 stream_languageid_index = avio_rl16(pb); // stream-language-id-index
544 if (stream_num < 128)
545 asf->streams[stream_num].stream_language_index = stream_languageid_index;
547 avio_rl64(pb); // avg frametime in 100ns units
548 stream_ct = avio_rl16(pb); // stream-name-count
549 payload_ext_ct = avio_rl16(pb); // payload-extension-system-count
551 if (stream_num < 128)
552 asf->stream_bitrates[stream_num] = leak_rate;
554 for (i = 0; i < stream_ct; i++) {
556 ext_len = avio_rl16(pb);
557 avio_skip(pb, ext_len);
560 for (i = 0; i < payload_ext_ct; i++) {
563 ext_len = avio_rl32(pb);
564 avio_skip(pb, ext_len);
570 static int asf_read_content_desc(AVFormatContext *s, int64_t size)
572 AVIOContext *pb = s->pb;
573 int len1, len2, len3, len4, len5;
575 len1 = avio_rl16(pb);
576 len2 = avio_rl16(pb);
577 len3 = avio_rl16(pb);
578 len4 = avio_rl16(pb);
579 len5 = avio_rl16(pb);
580 get_tag(s, "title", 0, len1, 32);
581 get_tag(s, "author", 0, len2, 32);
582 get_tag(s, "copyright", 0, len3, 32);
583 get_tag(s, "comment", 0, len4, 32);
589 static int asf_read_ext_content_desc(AVFormatContext *s, int64_t size)
591 AVIOContext *pb = s->pb;
592 ASFContext *asf = s->priv_data;
593 int desc_count, i, ret;
595 desc_count = avio_rl16(pb);
596 for (i = 0; i < desc_count; i++) {
597 int name_len, value_type, value_len;
600 name_len = avio_rl16(pb);
601 if (name_len % 2) // must be even, broken lavf versions wrote len-1
603 if ((ret = avio_get_str16le(pb, name_len, name, sizeof(name))) < name_len)
604 avio_skip(pb, name_len - ret);
605 value_type = avio_rl16(pb);
606 value_len = avio_rl16(pb);
607 if (!value_type && value_len % 2)
609 /* My sample has that stream set to 0 maybe that mean the container.
610 * ASF stream count starts at 1. I am using 0 to the container value
611 * since it's unused. */
612 if (!strcmp(name, "AspectRatioX"))
613 asf->dar[0].num = get_value(s->pb, value_type, 32);
614 else if (!strcmp(name, "AspectRatioY"))
615 asf->dar[0].den = get_value(s->pb, value_type, 32);
617 get_tag(s, name, value_type, value_len, 32);
623 static int asf_read_language_list(AVFormatContext *s, int64_t size)
625 AVIOContext *pb = s->pb;
626 ASFContext *asf = s->priv_data;
628 int stream_count = avio_rl16(pb);
629 for (j = 0; j < stream_count; j++) {
631 unsigned int lang_len = avio_r8(pb);
632 if ((ret = avio_get_str16le(pb, lang_len, lang,
633 sizeof(lang))) < lang_len)
634 avio_skip(pb, lang_len - ret);
636 av_strlcpy(asf->stream_languages[j], lang,
637 sizeof(*asf->stream_languages));
643 static int asf_read_metadata(AVFormatContext *s, int64_t size)
645 AVIOContext *pb = s->pb;
646 ASFContext *asf = s->priv_data;
647 int n, stream_num, name_len, value_len;
651 for (i = 0; i < n; i++) {
655 avio_rl16(pb); // lang_list_index
656 stream_num = avio_rl16(pb);
657 name_len = avio_rl16(pb);
658 value_type = avio_rl16(pb); /* value_type */
659 value_len = avio_rl32(pb);
661 if ((ret = avio_get_str16le(pb, name_len, name, sizeof(name))) < name_len)
662 avio_skip(pb, name_len - ret);
663 av_dlog(s, "%d stream %d name_len %2d type %d len %4d <%s>\n",
664 i, stream_num, name_len, value_type, value_len, name);
666 if (!strcmp(name, "AspectRatioX")){
667 int aspect_x = get_value(s->pb, value_type, 16);
669 asf->dar[stream_num].num = aspect_x;
670 } else if(!strcmp(name, "AspectRatioY")){
671 int aspect_y = get_value(s->pb, value_type, 16);
673 asf->dar[stream_num].den = aspect_y;
675 get_tag(s, name, value_type, value_len, 16);
682 static int asf_read_marker(AVFormatContext *s, int64_t size)
684 AVIOContext *pb = s->pb;
685 int i, count, name_len, ret;
688 avio_rl64(pb); // reserved 16 bytes
689 avio_rl64(pb); // ...
690 count = avio_rl32(pb); // markers count
691 avio_rl16(pb); // reserved 2 bytes
692 name_len = avio_rl16(pb); // name length
693 for (i = 0; i < name_len; i++)
694 avio_r8(pb); // skip the name
696 for (i = 0; i < count; i++) {
700 avio_rl64(pb); // offset, 8 bytes
701 pres_time = avio_rl64(pb); // presentation time
702 avio_rl16(pb); // entry length
703 avio_rl32(pb); // send time
704 avio_rl32(pb); // flags
705 name_len = avio_rl32(pb); // name length
706 if ((ret = avio_get_str16le(pb, name_len * 2, name,
707 sizeof(name))) < name_len)
708 avio_skip(pb, name_len - ret);
709 avpriv_new_chapter(s, i, (AVRational) { 1, 10000000 }, pres_time,
710 AV_NOPTS_VALUE, name);
716 static int asf_read_header(AVFormatContext *s)
718 ASFContext *asf = s->priv_data;
720 AVIOContext *pb = s->pb;
725 if (ff_guidcmp(&g, &ff_asf_header))
731 memset(&asf->asfid2avid, -1, sizeof(asf->asfid2avid));
733 uint64_t gpos = avio_tell(pb);
735 gsize = avio_rl64(pb);
737 if (!ff_guidcmp(&g, &ff_asf_data_header)) {
738 asf->data_object_offset = avio_tell(pb);
739 /* If not streaming, gsize is not unlimited (how?),
740 * and there is enough space in the file.. */
741 if (!(asf->hdr.flags & 0x01) && gsize >= 100)
742 asf->data_object_size = gsize - 24;
744 asf->data_object_size = (uint64_t)-1;
749 if (!ff_guidcmp(&g, &ff_asf_file_header)) {
750 int ret = asf_read_file_properties(s, gsize);
753 } else if (!ff_guidcmp(&g, &ff_asf_stream_header)) {
754 asf_read_stream_properties(s, gsize);
755 } else if (!ff_guidcmp(&g, &ff_asf_comment_header)) {
756 asf_read_content_desc(s, gsize);
757 } else if (!ff_guidcmp(&g, &ff_asf_language_guid)) {
758 asf_read_language_list(s, gsize);
759 } else if (!ff_guidcmp(&g, &ff_asf_extended_content_header)) {
760 asf_read_ext_content_desc(s, gsize);
761 } else if (!ff_guidcmp(&g, &ff_asf_metadata_header)) {
762 asf_read_metadata(s, gsize);
763 } else if (!ff_guidcmp(&g, &ff_asf_metadata_library_header)) {
764 asf_read_metadata(s, gsize);
765 } else if (!ff_guidcmp(&g, &ff_asf_ext_stream_header)) {
766 asf_read_ext_stream_properties(s, gsize);
768 // there could be a optional stream properties object to follow
769 // if so the next iteration will pick it up
771 } else if (!ff_guidcmp(&g, &ff_asf_head1_guid)) {
775 } else if (!ff_guidcmp(&g, &ff_asf_marker_header)) {
776 asf_read_marker(s, gsize);
777 } else if (pb->eof_reached) {
781 if (!ff_guidcmp(&g, &ff_asf_content_encryption)) {
782 av_log(s, AV_LOG_WARNING,
783 "DRM protected stream detected, decoding will likely fail!\n");
784 } else if (!ff_guidcmp(&g, &ff_asf_ext_content_encryption)) {
785 av_log(s, AV_LOG_WARNING,
786 "Ext DRM protected stream detected, decoding will likely fail!\n");
787 } else if (!ff_guidcmp(&g, &ff_asf_digital_signature)) {
788 av_log(s, AV_LOG_WARNING,
789 "Digital signature detected, decoding will likely fail!\n");
793 if (avio_tell(pb) != gpos + gsize)
794 av_log(s, AV_LOG_DEBUG,
795 "gpos mismatch our pos=%"PRIu64", end=%"PRId64"\n",
796 avio_tell(pb) - gpos, gsize);
797 avio_seek(pb, gpos + gsize, SEEK_SET);
805 asf->data_offset = avio_tell(pb);
806 asf->packet_size_left = 0;
808 for (i = 0; i < 128; i++) {
809 int stream_num = asf->asfid2avid[i];
810 if (stream_num >= 0) {
811 AVStream *st = s->streams[stream_num];
812 if (!st->codec->bit_rate)
813 st->codec->bit_rate = asf->stream_bitrates[i];
814 if (asf->dar[i].num > 0 && asf->dar[i].den > 0) {
815 av_reduce(&st->sample_aspect_ratio.num,
816 &st->sample_aspect_ratio.den,
817 asf->dar[i].num, asf->dar[i].den, INT_MAX);
818 } else if ((asf->dar[0].num > 0) && (asf->dar[0].den > 0) &&
819 // Use ASF container value if the stream doesn't set AR.
820 (st->codec->codec_type == AVMEDIA_TYPE_VIDEO))
821 av_reduce(&st->sample_aspect_ratio.num,
822 &st->sample_aspect_ratio.den,
823 asf->dar[0].num, asf->dar[0].den, INT_MAX);
825 av_dlog(s, "i=%d, st->codec->codec_type:%d, asf->dar %d:%d sar=%d:%d\n",
826 i, st->codec->codec_type, asf->dar[i].num, asf->dar[i].den,
827 st->sample_aspect_ratio.num, st->sample_aspect_ratio.den);
829 // copy and convert language codes to the frontend
830 if (asf->streams[i].stream_language_index < 128) {
831 const char *rfc1766 = asf->stream_languages[asf->streams[i].stream_language_index];
832 if (rfc1766 && strlen(rfc1766) > 1) {
833 const char primary_tag[3] = { rfc1766[0], rfc1766[1], '\0' }; // ignore country code if any
834 const char *iso6392 = av_convert_lang_to(primary_tag,
835 AV_LANG_ISO639_2_BIBL);
837 av_dict_set(&st->metadata, "language", iso6392, 0);
843 ff_metadata_conv(&s->metadata, NULL, ff_asf_metadata_conv);
848 #define DO_2BITS(bits, var, defval) \
849 switch (bits & 3) { \
851 var = avio_rl32(pb); \
855 var = avio_rl16(pb); \
868 * Load a single ASF packet into the demuxer.
869 * @param s demux context
870 * @param pb context to read data from
871 * @return 0 on success, <0 on error
873 static int ff_asf_get_packet(AVFormatContext *s, AVIOContext *pb)
875 ASFContext *asf = s->priv_data;
876 uint32_t packet_length, padsize;
880 // if we do not know packet size, allow skipping up to 32 kB
882 if (asf->no_resync_search)
884 else if (s->packet_size > 0)
885 off = (avio_tell(pb) - s->data_offset) % s->packet_size + 3;
892 if (c == 0x82 && !d && !e)
897 /* This code allows handling of -EAGAIN at packet boundaries (i.e.
898 * if the packet sync code above triggers -EAGAIN). This does not
899 * imply complete -EAGAIN handling support at random positions in
901 if (pb->error == AVERROR(EAGAIN))
902 return AVERROR(EAGAIN);
903 if (!pb->eof_reached)
904 av_log(s, AV_LOG_ERROR,
905 "ff asf bad header %x at:%"PRId64"\n", c, avio_tell(pb));
907 if ((c & 0x8f) == 0x82) {
909 if (!pb->eof_reached)
910 av_log(s, AV_LOG_ERROR, "ff asf bad non zero\n");
916 } else if (!pb->eof_reached) {
917 avio_seek(pb, -1, SEEK_CUR); // FIXME
920 asf->packet_flags = c;
921 asf->packet_property = d;
923 DO_2BITS(asf->packet_flags >> 5, packet_length, s->packet_size);
924 DO_2BITS(asf->packet_flags >> 1, padsize, 0); // sequence ignored
925 DO_2BITS(asf->packet_flags >> 3, padsize, 0); // padding length
927 // the following checks prevent overflows and infinite loops
928 if (!packet_length || packet_length >= (1U << 29)) {
929 av_log(s, AV_LOG_ERROR,
930 "invalid packet_length %d at:%"PRId64"\n",
931 packet_length, avio_tell(pb));
934 if (padsize >= packet_length) {
935 av_log(s, AV_LOG_ERROR,
936 "invalid padsize %d at:%"PRId64"\n", padsize, avio_tell(pb));
940 asf->packet_timestamp = avio_rl32(pb);
941 avio_rl16(pb); /* duration */
942 // rsize has at least 11 bytes which have to be present
944 if (asf->packet_flags & 0x01) {
945 asf->packet_segsizetype = avio_r8(pb);
947 asf->packet_segments = asf->packet_segsizetype & 0x3f;
949 asf->packet_segments = 1;
950 asf->packet_segsizetype = 0x80;
952 if (rsize > packet_length - padsize) {
953 asf->packet_size_left = 0;
954 av_log(s, AV_LOG_ERROR,
955 "invalid packet header length %d for pktlen %d-%d at %"PRId64"\n",
956 rsize, packet_length, padsize, avio_tell(pb));
959 asf->packet_size_left = packet_length - padsize - rsize;
960 if (packet_length < asf->hdr.min_pktsize)
961 padsize += asf->hdr.min_pktsize - packet_length;
962 asf->packet_padsize = padsize;
963 av_dlog(s, "packet: size=%d padsize=%d left=%d\n",
964 s->packet_size, asf->packet_padsize, asf->packet_size_left);
970 * @return <0 if error
972 static int asf_read_frame_header(AVFormatContext *s, AVIOContext *pb)
974 ASFContext *asf = s->priv_data;
976 int num = avio_r8(pb);
979 asf->packet_segments--;
980 asf->packet_key_frame = num >> 7;
981 asf->stream_index = asf->asfid2avid[num & 0x7f];
982 // sequence should be ignored!
983 DO_2BITS(asf->packet_property >> 4, asf->packet_seq, 0);
984 DO_2BITS(asf->packet_property >> 2, asf->packet_frag_offset, 0);
985 DO_2BITS(asf->packet_property, asf->packet_replic_size, 0);
986 av_dlog(asf, "key:%d stream:%d seq:%d offset:%d replic_size:%d\n",
987 asf->packet_key_frame, asf->stream_index, asf->packet_seq,
988 asf->packet_frag_offset, asf->packet_replic_size);
989 if (asf->packet_replic_size >= 8) {
990 asf->packet_obj_size = avio_rl32(pb);
991 if (asf->packet_obj_size >= (1 << 24) || asf->packet_obj_size <= 0) {
992 av_log(s, AV_LOG_ERROR, "packet_obj_size invalid\n");
995 asf->packet_frag_timestamp = avio_rl32(pb); // timestamp
996 if (asf->packet_replic_size >= 8 + 38 + 4) {
1002 avio_skip(pb, asf->packet_replic_size - 8 - 38 - 4);
1004 asf->packet_frag_timestamp = ts0 / 10000;
1006 asf->packet_frag_timestamp = AV_NOPTS_VALUE;
1008 avio_skip(pb, asf->packet_replic_size - 8);
1009 rsize += asf->packet_replic_size; // FIXME - check validity
1010 } else if (asf->packet_replic_size == 1) {
1011 // multipacket - frag_offset is beginning timestamp
1012 asf->packet_time_start = asf->packet_frag_offset;
1013 asf->packet_frag_offset = 0;
1014 asf->packet_frag_timestamp = asf->packet_timestamp;
1016 asf->packet_time_delta = avio_r8(pb);
1018 } else if (asf->packet_replic_size != 0) {
1019 av_log(s, AV_LOG_ERROR, "unexpected packet_replic_size of %d\n",
1020 asf->packet_replic_size);
1023 if (asf->packet_flags & 0x01) {
1024 DO_2BITS(asf->packet_segsizetype >> 6, asf->packet_frag_size, 0); // 0 is illegal
1025 if (rsize > asf->packet_size_left) {
1026 av_log(s, AV_LOG_ERROR, "packet_replic_size is invalid\n");
1028 } else if (asf->packet_frag_size > asf->packet_size_left - rsize) {
1029 if (asf->packet_frag_size > asf->packet_size_left - rsize + asf->packet_padsize) {
1030 av_log(s, AV_LOG_ERROR, "packet_frag_size is invalid (%d-%d)\n",
1031 asf->packet_size_left, rsize);
1034 int diff = asf->packet_frag_size - (asf->packet_size_left - rsize);
1035 asf->packet_size_left += diff;
1036 asf->packet_padsize -= diff;
1040 if (rsize > asf->packet_size_left) {
1041 av_log(s, AV_LOG_ERROR, "packet_replic_size is invalid\n");
1044 asf->packet_frag_size = asf->packet_size_left - rsize;
1046 if (asf->packet_replic_size == 1) {
1047 asf->packet_multi_size = asf->packet_frag_size;
1048 if (asf->packet_multi_size > asf->packet_size_left)
1051 asf->packet_size_left -= rsize;
1057 * Parse data from individual ASF packets (which were previously loaded
1058 * with asf_get_packet()).
1059 * @param s demux context
1060 * @param pb context to read data from
1061 * @param pkt pointer to store packet data into
1062 * @return 0 if data was stored in pkt, <0 on error or 1 if more ASF
1063 * packets need to be loaded (through asf_get_packet())
1065 static int ff_asf_parse_packet(AVFormatContext *s, AVIOContext *pb, AVPacket *pkt)
1067 ASFContext *asf = s->priv_data;
1068 ASFStream *asf_st = 0;
1072 if (pb->eof_reached)
1075 if (asf->packet_size_left < FRAME_HEADER_SIZE ||
1076 asf->packet_segments < 1) {
1077 int ret = asf->packet_size_left + asf->packet_padsize;
1083 asf->packet_pos = avio_tell(pb);
1084 if (asf->data_object_size != (uint64_t)-1 &&
1085 (asf->packet_pos - asf->data_object_offset >= asf->data_object_size))
1086 return AVERROR_EOF; /* Do not exceed the size of the data object */
1089 if (asf->packet_time_start == 0) {
1090 if (asf_read_frame_header(s, pb) < 0) {
1091 asf->packet_segments = 0;
1094 if (asf->stream_index < 0 ||
1095 s->streams[asf->stream_index]->discard >= AVDISCARD_ALL ||
1096 (!asf->packet_key_frame &&
1097 s->streams[asf->stream_index]->discard >= AVDISCARD_NONKEY)) {
1098 asf->packet_time_start = 0;
1099 /* unhandled packet (should not happen) */
1100 avio_skip(pb, asf->packet_frag_size);
1101 asf->packet_size_left -= asf->packet_frag_size;
1102 if (asf->stream_index < 0)
1103 av_log(s, AV_LOG_ERROR, "ff asf skip %d (unknown stream)\n",
1104 asf->packet_frag_size);
1107 asf->asf_st = s->streams[asf->stream_index]->priv_data;
1109 asf_st = asf->asf_st;
1111 if (asf->packet_replic_size == 1) {
1112 // frag_offset is here used as the beginning timestamp
1113 asf->packet_frag_timestamp = asf->packet_time_start;
1114 asf->packet_time_start += asf->packet_time_delta;
1115 asf->packet_obj_size = asf->packet_frag_size = avio_r8(pb);
1116 asf->packet_size_left--;
1117 asf->packet_multi_size--;
1118 if (asf->packet_multi_size < asf->packet_obj_size) {
1119 asf->packet_time_start = 0;
1120 avio_skip(pb, asf->packet_multi_size);
1121 asf->packet_size_left -= asf->packet_multi_size;
1124 asf->packet_multi_size -= asf->packet_obj_size;
1126 if (asf_st->frag_offset + asf->packet_frag_size <= asf_st->pkt.size &&
1127 asf_st->frag_offset + asf->packet_frag_size > asf->packet_obj_size) {
1128 av_log(s, AV_LOG_INFO, "ignoring invalid packet_obj_size (%d %d %d %d)\n",
1129 asf_st->frag_offset, asf->packet_frag_size,
1130 asf->packet_obj_size, asf_st->pkt.size);
1131 asf->packet_obj_size = asf_st->pkt.size;
1134 if (asf_st->pkt.size != asf->packet_obj_size ||
1135 // FIXME is this condition sufficient?
1136 asf_st->frag_offset + asf->packet_frag_size > asf_st->pkt.size) {
1137 if (asf_st->pkt.data) {
1138 av_log(s, AV_LOG_INFO,
1139 "freeing incomplete packet size %d, new %d\n",
1140 asf_st->pkt.size, asf->packet_obj_size);
1141 asf_st->frag_offset = 0;
1142 av_free_packet(&asf_st->pkt);
1145 av_new_packet(&asf_st->pkt, asf->packet_obj_size);
1146 asf_st->seq = asf->packet_seq;
1147 asf_st->pkt.dts = asf->packet_frag_timestamp - asf->hdr.preroll;
1148 asf_st->pkt.stream_index = asf->stream_index;
1149 asf_st->pkt.pos = asf_st->packet_pos = asf->packet_pos;
1151 if (asf_st->pkt.data && asf_st->palette_changed) {
1153 pal = av_packet_new_side_data(&asf_st->pkt, AV_PKT_DATA_PALETTE,
1156 av_log(s, AV_LOG_ERROR, "Cannot append palette to packet\n");
1158 memcpy(pal, asf_st->palette, AVPALETTE_SIZE);
1159 asf_st->palette_changed = 0;
1162 av_dlog(asf, "new packet: stream:%d key:%d packet_key:%d audio:%d size:%d\n",
1163 asf->stream_index, asf->packet_key_frame,
1164 asf_st->pkt.flags & AV_PKT_FLAG_KEY,
1165 s->streams[asf->stream_index]->codec->codec_type == AVMEDIA_TYPE_AUDIO,
1166 asf->packet_obj_size);
1167 if (s->streams[asf->stream_index]->codec->codec_type == AVMEDIA_TYPE_AUDIO)
1168 asf->packet_key_frame = 1;
1169 if (asf->packet_key_frame)
1170 asf_st->pkt.flags |= AV_PKT_FLAG_KEY;
1174 av_dlog(asf, "READ PACKET s:%d os:%d o:%d,%d l:%d DATA:%p\n",
1175 s->packet_size, asf_st->pkt.size, asf->packet_frag_offset,
1176 asf_st->frag_offset, asf->packet_frag_size, asf_st->pkt.data);
1177 asf->packet_size_left -= asf->packet_frag_size;
1178 if (asf->packet_size_left < 0)
1181 if (asf->packet_frag_offset >= asf_st->pkt.size ||
1182 asf->packet_frag_size > asf_st->pkt.size - asf->packet_frag_offset) {
1183 av_log(s, AV_LOG_ERROR,
1184 "packet fragment position invalid %u,%u not in %u\n",
1185 asf->packet_frag_offset, asf->packet_frag_size,
1190 ret = avio_read(pb, asf_st->pkt.data + asf->packet_frag_offset,
1191 asf->packet_frag_size);
1192 if (ret != asf->packet_frag_size) {
1193 if (ret < 0 || asf->packet_frag_offset + ret == 0)
1194 return ret < 0 ? ret : AVERROR_EOF;
1196 if (asf_st->ds_span > 1) {
1197 // scrambling, we can either drop it completely or fill the remainder
1198 // TODO: should we fill the whole packet instead of just the current
1200 memset(asf_st->pkt.data + asf->packet_frag_offset + ret, 0,
1201 asf->packet_frag_size - ret);
1202 ret = asf->packet_frag_size;
1204 // no scrambling, so we can return partial packets
1205 av_shrink_packet(&asf_st->pkt, asf->packet_frag_offset + ret);
1208 if (s->key && s->keylen == 20)
1209 ff_asfcrypt_dec(s->key, asf_st->pkt.data + asf->packet_frag_offset,
1211 asf_st->frag_offset += ret;
1212 /* test if whole packet is read */
1213 if (asf_st->frag_offset == asf_st->pkt.size) {
1214 // workaround for macroshit radio DVR-MS files
1215 if (s->streams[asf->stream_index]->codec->codec_id == AV_CODEC_ID_MPEG2VIDEO &&
1216 asf_st->pkt.size > 100) {
1218 for (i = 0; i < asf_st->pkt.size && !asf_st->pkt.data[i]; i++)
1220 if (i == asf_st->pkt.size) {
1221 av_log(s, AV_LOG_DEBUG, "discarding ms fart\n");
1222 asf_st->frag_offset = 0;
1223 av_free_packet(&asf_st->pkt);
1229 if (asf_st->ds_span > 1) {
1230 if (asf_st->pkt.size != asf_st->ds_packet_size * asf_st->ds_span) {
1231 av_log(s, AV_LOG_ERROR,
1232 "pkt.size != ds_packet_size * ds_span (%d %d %d)\n",
1233 asf_st->pkt.size, asf_st->ds_packet_size,
1236 /* packet descrambling */
1237 uint8_t *newdata = av_malloc(asf_st->pkt.size +
1238 FF_INPUT_BUFFER_PADDING_SIZE);
1241 memset(newdata + asf_st->pkt.size, 0,
1242 FF_INPUT_BUFFER_PADDING_SIZE);
1243 while (offset < asf_st->pkt.size) {
1244 int off = offset / asf_st->ds_chunk_size;
1245 int row = off / asf_st->ds_span;
1246 int col = off % asf_st->ds_span;
1247 int idx = row + col * asf_st->ds_packet_size / asf_st->ds_chunk_size;
1248 assert(offset + asf_st->ds_chunk_size <= asf_st->pkt.size);
1249 assert(idx + 1 <= asf_st->pkt.size / asf_st->ds_chunk_size);
1250 memcpy(newdata + offset,
1251 asf_st->pkt.data + idx * asf_st->ds_chunk_size,
1252 asf_st->ds_chunk_size);
1253 offset += asf_st->ds_chunk_size;
1255 av_free(asf_st->pkt.data);
1256 asf_st->pkt.data = newdata;
1260 asf_st->frag_offset = 0;
1262 asf_st->pkt.size = 0;
1263 asf_st->pkt.data = 0;
1264 asf_st->pkt.side_data_elems = 0;
1265 asf_st->pkt.side_data = NULL;
1266 break; // packet completed
1272 static int asf_read_packet(AVFormatContext *s, AVPacket *pkt)
1274 ASFContext *asf = s->priv_data;
1279 /* parse cached packets, if any */
1280 if ((ret = ff_asf_parse_packet(s, s->pb, pkt)) <= 0)
1282 if ((ret = ff_asf_get_packet(s, s->pb)) < 0)
1283 assert(asf->packet_size_left < FRAME_HEADER_SIZE ||
1284 asf->packet_segments < 1);
1285 asf->packet_time_start = 0;
1289 // Added to support seeking after packets have been read
1290 // If information is not reset, read_packet fails due to
1291 // leftover information from previous reads
1292 static void asf_reset_header(AVFormatContext *s)
1294 ASFContext *asf = s->priv_data;
1298 asf->packet_size_left = 0;
1299 asf->packet_segments = 0;
1300 asf->packet_flags = 0;
1301 asf->packet_property = 0;
1302 asf->packet_timestamp = 0;
1303 asf->packet_segsizetype = 0;
1304 asf->packet_segments = 0;
1305 asf->packet_seq = 0;
1306 asf->packet_replic_size = 0;
1307 asf->packet_key_frame = 0;
1308 asf->packet_padsize = 0;
1309 asf->packet_frag_offset = 0;
1310 asf->packet_frag_size = 0;
1311 asf->packet_frag_timestamp = 0;
1312 asf->packet_multi_size = 0;
1313 asf->packet_obj_size = 0;
1314 asf->packet_time_delta = 0;
1315 asf->packet_time_start = 0;
1317 for (i = 0; i < s->nb_streams; i++) {
1318 asf_st = s->streams[i]->priv_data;
1319 av_free_packet(&asf_st->pkt);
1320 asf_st->frag_offset = 0;
1326 static int asf_read_close(AVFormatContext *s)
1328 asf_reset_header(s);
1333 static int64_t asf_read_pts(AVFormatContext *s, int stream_index,
1334 int64_t *ppos, int64_t pos_limit)
1336 AVPacket pkt1, *pkt = &pkt1;
1339 int64_t pos = *ppos;
1341 int64_t start_pos[ASF_MAX_STREAMS];
1343 for (i = 0; i < s->nb_streams; i++)
1346 if (s->packet_size > 0)
1347 pos = (pos + s->packet_size - 1 - s->data_offset) /
1348 s->packet_size * s->packet_size +
1351 avio_seek(s->pb, pos, SEEK_SET);
1353 asf_reset_header(s);
1355 if (asf_read_packet(s, pkt) < 0) {
1356 av_log(s, AV_LOG_INFO, "asf_read_pts failed\n");
1357 return AV_NOPTS_VALUE;
1362 av_free_packet(pkt);
1363 if (pkt->flags & AV_PKT_FLAG_KEY) {
1364 i = pkt->stream_index;
1366 asf_st = s->streams[i]->priv_data;
1368 // assert((asf_st->packet_pos - s->data_offset) % s->packet_size == 0);
1369 pos = asf_st->packet_pos;
1371 av_add_index_entry(s->streams[i], pos, pts, pkt->size,
1372 pos - start_pos[i] + 1, AVINDEX_KEYFRAME);
1373 start_pos[i] = asf_st->packet_pos + 1;
1375 if (pkt->stream_index == stream_index)
1384 static void asf_build_simple_index(AVFormatContext *s, int stream_index)
1387 ASFContext *asf = s->priv_data;
1388 int64_t current_pos = avio_tell(s->pb);
1391 avio_seek(s->pb, asf->data_object_offset + asf->data_object_size, SEEK_SET);
1392 ff_get_guid(s->pb, &g);
1394 /* the data object can be followed by other top-level objects,
1395 * skip them until the simple index object is reached */
1396 while (ff_guidcmp(&g, &index_guid)) {
1397 int64_t gsize = avio_rl64(s->pb);
1398 if (gsize < 24 || s->pb->eof_reached) {
1399 avio_seek(s->pb, current_pos, SEEK_SET);
1402 avio_skip(s->pb, gsize - 24);
1403 ff_get_guid(s->pb, &g);
1407 int64_t itime, last_pos = -1;
1409 int64_t av_unused gsize = avio_rl64(s->pb);
1410 ff_get_guid(s->pb, &g);
1411 itime = avio_rl64(s->pb);
1412 pct = avio_rl32(s->pb);
1413 ict = avio_rl32(s->pb);
1414 av_log(s, AV_LOG_DEBUG,
1415 "itime:0x%"PRIx64", pct:%d, ict:%d\n", itime, pct, ict);
1417 for (i = 0; i < ict; i++) {
1418 int pktnum = avio_rl32(s->pb);
1419 int pktct = avio_rl16(s->pb);
1420 int64_t pos = s->data_offset + s->packet_size * (int64_t)pktnum;
1421 int64_t index_pts = FFMAX(av_rescale(itime, i, 10000) - asf->hdr.preroll, 0);
1423 if (pos != last_pos) {
1424 av_log(s, AV_LOG_DEBUG, "pktnum:%d, pktct:%d pts: %"PRId64"\n",
1425 pktnum, pktct, index_pts);
1426 av_add_index_entry(s->streams[stream_index], pos, index_pts,
1427 s->packet_size, 0, AVINDEX_KEYFRAME);
1431 asf->index_read = ict > 0;
1433 avio_seek(s->pb, current_pos, SEEK_SET);
1436 static int asf_read_seek(AVFormatContext *s, int stream_index,
1437 int64_t pts, int flags)
1439 ASFContext *asf = s->priv_data;
1440 AVStream *st = s->streams[stream_index];
1444 if (s->packet_size <= 0)
1447 /* Try using the protocol's read_seek if available */
1449 int ret = avio_seek_time(s->pb, stream_index, pts, flags);
1451 asf_reset_header(s);
1452 if (ret != AVERROR(ENOSYS))
1456 if (!asf->index_read)
1457 asf_build_simple_index(s, stream_index);
1459 if ((asf->index_read && st->index_entries)) {
1460 index = av_index_search_timestamp(st, pts, flags);
1462 /* find the position */
1463 pos = st->index_entries[index].pos;
1466 av_log(s, AV_LOG_DEBUG, "SEEKTO: %"PRId64"\n", pos);
1467 avio_seek(s->pb, pos, SEEK_SET);
1468 asf_reset_header(s);
1472 /* no index or seeking by index failed */
1473 if (ff_seek_frame_binary(s, stream_index, pts, flags) < 0)
1475 asf_reset_header(s);
1479 AVInputFormat ff_asf_demuxer = {
1481 .long_name = NULL_IF_CONFIG_SMALL("ASF (Advanced / Active Streaming Format)"),
1482 .priv_data_size = sizeof(ASFContext),
1483 .read_probe = asf_probe,
1484 .read_header = asf_read_header,
1485 .read_packet = asf_read_packet,
1486 .read_close = asf_read_close,
1487 .read_seek = asf_read_seek,
1488 .read_timestamp = asf_read_pts,
1489 .flags = AVFMT_NOBINSEARCH | AVFMT_NOGENSEARCH,
1490 .priv_class = &asf_class,