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
22 #include "libavutil/attributes.h"
23 #include "libavutil/avassert.h"
24 #include "libavutil/avstring.h"
25 #include "libavutil/bswap.h"
26 #include "libavutil/common.h"
27 #include "libavutil/dict.h"
28 #include "libavutil/internal.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 static int asf_probe(AVProbeData *pd)
156 /* check file header */
157 if (!ff_guidcmp(pd->buf, &ff_asf_header))
158 return AVPROBE_SCORE_MAX;
163 /* size of type 2 (BOOL) is 32bit for "Extended Content Description Object"
164 * but 16 bit for "Metadata Object" and "Metadata Library Object" */
165 static int get_value(AVIOContext *pb, int type, int type2_size)
169 return (type2_size == 32) ? avio_rl32(pb) : avio_rl16(pb);
171 return avio_rl32(pb);
173 return avio_rl64(pb);
175 return avio_rl16(pb);
181 /* MSDN claims that this should be "compatible with the ID3 frame, APIC",
182 * but in reality this is only loosely similar */
183 static int asf_read_picture(AVFormatContext *s, int len)
185 AVPacket pkt = { 0 };
186 const CodecMime *mime = ff_id3v2_mime_tags;
187 enum AVCodecID id = AV_CODEC_ID_NONE;
189 uint8_t *desc = NULL;
191 int ret, type, picsize, desc_len;
193 /* type + picsize + mime + desc */
194 if (len < 1 + 4 + 2 + 2) {
195 av_log(s, AV_LOG_ERROR, "Invalid attached picture size: %d.\n", len);
196 return AVERROR_INVALIDDATA;
200 type = avio_r8(s->pb);
202 if (type >= FF_ARRAY_ELEMS(ff_id3v2_picture_types) || type < 0) {
203 av_log(s, AV_LOG_WARNING, "Unknown attached picture type: %d.\n", type);
207 /* picture data size */
208 picsize = avio_rl32(s->pb);
211 /* picture MIME type */
212 len -= avio_get_str16le(s->pb, len, mimetype, sizeof(mimetype));
213 while (mime->id != AV_CODEC_ID_NONE) {
214 if (!strncmp(mime->str, mimetype, sizeof(mimetype))) {
220 if (id == AV_CODEC_ID_NONE) {
221 av_log(s, AV_LOG_ERROR, "Unknown attached picture mimetype: %s.\n",
226 if (picsize >= len) {
227 av_log(s, AV_LOG_ERROR, "Invalid attached picture data size: %d >= %d.\n",
229 return AVERROR_INVALIDDATA;
232 /* picture description */
233 desc_len = (len - picsize) * 2 + 1;
234 desc = av_malloc(desc_len);
236 return AVERROR(ENOMEM);
237 len -= avio_get_str16le(s->pb, len - picsize, desc, desc_len);
239 ret = av_get_packet(s->pb, &pkt, picsize);
243 st = avformat_new_stream(s, NULL);
245 ret = AVERROR(ENOMEM);
248 st->disposition |= AV_DISPOSITION_ATTACHED_PIC;
249 st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
250 st->codec->codec_id = id;
251 st->attached_pic = pkt;
252 st->attached_pic.stream_index = st->index;
253 st->attached_pic.flags |= AV_PKT_FLAG_KEY;
256 av_dict_set(&st->metadata, "title", desc, AV_DICT_DONT_STRDUP_VAL);
260 av_dict_set(&st->metadata, "comment", ff_id3v2_picture_types[type], 0);
266 av_free_packet(&pkt);
270 static void get_id3_tag(AVFormatContext *s, int len)
272 ID3v2ExtraMeta *id3v2_extra_meta = NULL;
274 ff_id3v2_read(s, ID3v2_DEFAULT_MAGIC, &id3v2_extra_meta);
275 if (id3v2_extra_meta)
276 ff_id3v2_parse_apic(s, &id3v2_extra_meta);
277 ff_id3v2_free_extra_meta(&id3v2_extra_meta);
280 static void get_tag(AVFormatContext *s, const char *key, int type, int len, int type2_size)
283 int64_t off = avio_tell(s->pb);
285 if ((unsigned)len >= (UINT_MAX - 1) / 2)
288 value = av_malloc(2 * len + 1);
292 if (type == 0) { // UTF16-LE
293 avio_get_str16le(s->pb, len, value, 2 * len + 1);
294 } else if (type == 1) { // byte array
295 if (!strcmp(key, "WM/Picture")) { // handle cover art
296 asf_read_picture(s, len);
297 } else if (!strcmp(key, "ID3")) { // handle ID3 tag
300 av_log(s, AV_LOG_VERBOSE, "Unsupported byte array in tag %s.\n", key);
303 } else if (type > 1 && type <= 5) { // boolean or DWORD or QWORD or WORD
304 uint64_t num = get_value(s->pb, type, type2_size);
305 snprintf(value, len, "%"PRIu64, num);
306 } else if (type == 6) { // (don't) handle GUID
307 av_log(s, AV_LOG_DEBUG, "Unsupported GUID value in tag %s.\n", key);
310 av_log(s, AV_LOG_DEBUG,
311 "Unsupported value type %d in tag %s.\n", type, key);
315 av_dict_set(&s->metadata, key, value, 0);
319 avio_seek(s->pb, off + len, SEEK_SET);
322 static int asf_read_file_properties(AVFormatContext *s, int64_t size)
324 ASFContext *asf = s->priv_data;
325 AVIOContext *pb = s->pb;
327 ff_get_guid(pb, &asf->hdr.guid);
328 asf->hdr.file_size = avio_rl64(pb);
329 asf->hdr.create_time = avio_rl64(pb);
330 avio_rl64(pb); /* number of packets */
331 asf->hdr.play_time = avio_rl64(pb);
332 asf->hdr.send_time = avio_rl64(pb);
333 asf->hdr.preroll = avio_rl32(pb);
334 asf->hdr.ignore = avio_rl32(pb);
335 asf->hdr.flags = avio_rl32(pb);
336 asf->hdr.min_pktsize = avio_rl32(pb);
337 asf->hdr.max_pktsize = avio_rl32(pb);
338 if (asf->hdr.min_pktsize >= (1U << 29))
339 return AVERROR_INVALIDDATA;
340 asf->hdr.max_bitrate = avio_rl32(pb);
341 s->packet_size = asf->hdr.max_pktsize;
346 static int asf_read_stream_properties(AVFormatContext *s, int64_t size)
348 ASFContext *asf = s->priv_data;
349 AVIOContext *pb = s->pb;
353 enum AVMediaType type;
354 int type_specific_size, sizeX;
356 int64_t pos1, pos2, start_time;
357 int test_for_ext_stream_audio, is_dvr_ms_audio = 0;
359 if (s->nb_streams == ASF_MAX_STREAMS) {
360 av_log(s, AV_LOG_ERROR, "too many streams\n");
361 return AVERROR(EINVAL);
364 pos1 = avio_tell(pb);
366 st = avformat_new_stream(s, NULL);
368 return AVERROR(ENOMEM);
369 avpriv_set_pts_info(st, 32, 1, 1000); /* 32 bit pts in ms */
370 asf_st = av_mallocz(sizeof(ASFStream));
372 return AVERROR(ENOMEM);
373 st->priv_data = asf_st;
375 start_time = asf->hdr.preroll;
377 asf_st->stream_language_index = 128; // invalid stream index means no language info
379 if (!(asf->hdr.flags & 0x01)) { // if we aren't streaming...
380 st->duration = asf->hdr.play_time /
381 (10000000 / 1000) - start_time;
385 test_for_ext_stream_audio = 0;
386 if (!ff_guidcmp(&g, &ff_asf_audio_stream)) {
387 type = AVMEDIA_TYPE_AUDIO;
388 } else if (!ff_guidcmp(&g, &ff_asf_video_stream)) {
389 type = AVMEDIA_TYPE_VIDEO;
390 } else if (!ff_guidcmp(&g, &ff_asf_jfif_media)) {
391 type = AVMEDIA_TYPE_VIDEO;
392 st->codec->codec_id = AV_CODEC_ID_MJPEG;
393 } else if (!ff_guidcmp(&g, &ff_asf_command_stream)) {
394 type = AVMEDIA_TYPE_DATA;
395 } else if (!ff_guidcmp(&g, &ff_asf_ext_stream_embed_stream_header)) {
396 test_for_ext_stream_audio = 1;
397 type = AVMEDIA_TYPE_UNKNOWN;
402 avio_skip(pb, 8); /* total_size */
403 type_specific_size = avio_rl32(pb);
405 st->id = avio_rl16(pb) & 0x7f; /* stream id */
406 // mapping of asf ID to AV stream ID;
407 asf->asfid2avid[st->id] = s->nb_streams - 1;
411 if (test_for_ext_stream_audio) {
413 if (!ff_guidcmp(&g, &ff_asf_ext_stream_audio_stream)) {
414 type = AVMEDIA_TYPE_AUDIO;
425 st->codec->codec_type = type;
426 if (type == AVMEDIA_TYPE_AUDIO) {
427 int ret = ff_get_wav_header(pb, st->codec, type_specific_size);
430 if (is_dvr_ms_audio) {
431 // codec_id and codec_tag are unreliable in dvr_ms
432 // files. Set them later by probing stream.
433 st->codec->codec_id = AV_CODEC_ID_PROBE;
434 st->codec->codec_tag = 0;
436 if (st->codec->codec_id == AV_CODEC_ID_AAC)
437 st->need_parsing = AVSTREAM_PARSE_NONE;
439 st->need_parsing = AVSTREAM_PARSE_FULL;
440 /* We have to init the frame size at some point .... */
441 pos2 = avio_tell(pb);
442 if (size >= (pos2 + 8 - pos1 + 24)) {
443 asf_st->ds_span = avio_r8(pb);
444 asf_st->ds_packet_size = avio_rl16(pb);
445 asf_st->ds_chunk_size = avio_rl16(pb);
446 avio_rl16(pb); // ds_data_size
447 avio_r8(pb); // ds_silence_data
449 if (asf_st->ds_span > 1) {
450 if (!asf_st->ds_chunk_size ||
451 (asf_st->ds_packet_size / asf_st->ds_chunk_size <= 1) ||
452 asf_st->ds_packet_size % asf_st->ds_chunk_size)
453 asf_st->ds_span = 0; // disable descrambling
455 } else if (type == AVMEDIA_TYPE_VIDEO &&
456 size - (avio_tell(pb) - pos1 + 24) >= 51) {
460 avio_rl16(pb); /* size */
461 sizeX = avio_rl32(pb); /* size */
462 st->codec->width = avio_rl32(pb);
463 st->codec->height = avio_rl32(pb);
464 /* not available for asf */
465 avio_rl16(pb); /* panes */
466 st->codec->bits_per_coded_sample = avio_rl16(pb); /* depth */
467 tag1 = avio_rl32(pb);
470 st->codec->extradata_size = sizeX - 40;
471 st->codec->extradata = av_mallocz(st->codec->extradata_size +
472 FF_INPUT_BUFFER_PADDING_SIZE);
473 avio_read(pb, st->codec->extradata, st->codec->extradata_size);
476 /* Extract palette from extradata if bpp <= 8 */
477 /* This code assumes that extradata contains only palette */
478 /* This is true for all paletted codecs implemented in libavcodec */
479 if (st->codec->extradata_size && (st->codec->bits_per_coded_sample <= 8)) {
482 for (i = 0; i < FFMIN(st->codec->extradata_size, AVPALETTE_SIZE) / 4; i++)
483 asf_st->palette[i] = av_bswap32(((uint32_t *)st->codec->extradata)[i]);
485 memcpy(asf_st->palette, st->codec->extradata,
486 FFMIN(st->codec->extradata_size, AVPALETTE_SIZE));
488 asf_st->palette_changed = 1;
491 st->codec->codec_tag = tag1;
492 st->codec->codec_id = ff_codec_get_id(ff_codec_bmp_tags, tag1);
493 if (tag1 == MKTAG('D', 'V', 'R', ' ')) {
494 st->need_parsing = AVSTREAM_PARSE_FULL;
495 /* issue658 contains wrong w/h and MS even puts a fake seq header
496 * with wrong w/h in extradata while a correct one is in the stream.
497 * maximum lameness */
499 st->codec->height = 0;
500 av_freep(&st->codec->extradata);
501 st->codec->extradata_size = 0;
503 if (st->codec->codec_id == AV_CODEC_ID_H264)
504 st->need_parsing = AVSTREAM_PARSE_FULL_ONCE;
506 pos2 = avio_tell(pb);
507 avio_skip(pb, size - (pos2 - pos1 + 24));
512 static int asf_read_ext_stream_properties(AVFormatContext *s, int64_t size)
514 ASFContext *asf = s->priv_data;
515 AVIOContext *pb = s->pb;
517 int ext_len, payload_ext_ct, stream_ct, i;
518 uint32_t leak_rate, stream_num;
519 unsigned int stream_languageid_index;
521 avio_rl64(pb); // starttime
522 avio_rl64(pb); // endtime
523 leak_rate = avio_rl32(pb); // leak-datarate
524 avio_rl32(pb); // bucket-datasize
525 avio_rl32(pb); // init-bucket-fullness
526 avio_rl32(pb); // alt-leak-datarate
527 avio_rl32(pb); // alt-bucket-datasize
528 avio_rl32(pb); // alt-init-bucket-fullness
529 avio_rl32(pb); // max-object-size
530 avio_rl32(pb); // flags (reliable,seekable,no_cleanpoints?,resend-live-cleanpoints, rest of bits reserved)
531 stream_num = avio_rl16(pb); // stream-num
533 stream_languageid_index = avio_rl16(pb); // stream-language-id-index
534 if (stream_num < 128)
535 asf->streams[stream_num].stream_language_index = stream_languageid_index;
537 avio_rl64(pb); // avg frametime in 100ns units
538 stream_ct = avio_rl16(pb); // stream-name-count
539 payload_ext_ct = avio_rl16(pb); // payload-extension-system-count
541 if (stream_num < 128)
542 asf->stream_bitrates[stream_num] = leak_rate;
544 for (i = 0; i < stream_ct; i++) {
546 ext_len = avio_rl16(pb);
547 avio_skip(pb, ext_len);
550 for (i = 0; i < payload_ext_ct; i++) {
553 ext_len = avio_rl32(pb);
554 avio_skip(pb, ext_len);
560 static int asf_read_content_desc(AVFormatContext *s, int64_t size)
562 AVIOContext *pb = s->pb;
563 int len1, len2, len3, len4, len5;
565 len1 = avio_rl16(pb);
566 len2 = avio_rl16(pb);
567 len3 = avio_rl16(pb);
568 len4 = avio_rl16(pb);
569 len5 = avio_rl16(pb);
570 get_tag(s, "title", 0, len1, 32);
571 get_tag(s, "author", 0, len2, 32);
572 get_tag(s, "copyright", 0, len3, 32);
573 get_tag(s, "comment", 0, len4, 32);
579 static int asf_read_ext_content_desc(AVFormatContext *s, int64_t size)
581 AVIOContext *pb = s->pb;
582 ASFContext *asf = s->priv_data;
583 int desc_count, i, ret;
585 desc_count = avio_rl16(pb);
586 for (i = 0; i < desc_count; i++) {
587 int name_len, value_type, value_len;
590 name_len = avio_rl16(pb);
591 if (name_len % 2) // must be even, broken lavf versions wrote len-1
593 if ((ret = avio_get_str16le(pb, name_len, name, sizeof(name))) < name_len)
594 avio_skip(pb, name_len - ret);
595 value_type = avio_rl16(pb);
596 value_len = avio_rl16(pb);
597 if (!value_type && value_len % 2)
599 /* My sample has that stream set to 0 maybe that mean the container.
600 * ASF stream count starts at 1. I am using 0 to the container value
601 * since it's unused. */
602 if (!strcmp(name, "AspectRatioX"))
603 asf->dar[0].num = get_value(s->pb, value_type, 32);
604 else if (!strcmp(name, "AspectRatioY"))
605 asf->dar[0].den = get_value(s->pb, value_type, 32);
607 get_tag(s, name, value_type, value_len, 32);
613 static int asf_read_language_list(AVFormatContext *s, int64_t size)
615 AVIOContext *pb = s->pb;
616 ASFContext *asf = s->priv_data;
618 int stream_count = avio_rl16(pb);
619 for (j = 0; j < stream_count; j++) {
621 unsigned int lang_len = avio_r8(pb);
622 if ((ret = avio_get_str16le(pb, lang_len, lang,
623 sizeof(lang))) < lang_len)
624 avio_skip(pb, lang_len - ret);
626 av_strlcpy(asf->stream_languages[j], lang,
627 sizeof(*asf->stream_languages));
633 static int asf_read_metadata(AVFormatContext *s, int64_t size)
635 AVIOContext *pb = s->pb;
636 ASFContext *asf = s->priv_data;
637 int n, stream_num, name_len, value_len;
641 for (i = 0; i < n; i++) {
645 avio_rl16(pb); // lang_list_index
646 stream_num = avio_rl16(pb);
647 name_len = avio_rl16(pb);
648 value_type = avio_rl16(pb); /* value_type */
649 value_len = avio_rl32(pb);
651 if ((ret = avio_get_str16le(pb, name_len, name, sizeof(name))) < name_len)
652 avio_skip(pb, name_len - ret);
653 av_dlog(s, "%d stream %d name_len %2d type %d len %4d <%s>\n",
654 i, stream_num, name_len, value_type, value_len, name);
656 if (!strcmp(name, "AspectRatioX")){
657 int aspect_x = get_value(s->pb, value_type, 16);
659 asf->dar[stream_num].num = aspect_x;
660 } else if(!strcmp(name, "AspectRatioY")){
661 int aspect_y = get_value(s->pb, value_type, 16);
663 asf->dar[stream_num].den = aspect_y;
665 get_tag(s, name, value_type, value_len, 16);
672 static int asf_read_marker(AVFormatContext *s, int64_t size)
674 AVIOContext *pb = s->pb;
675 ASFContext *asf = s->priv_data;
676 int i, count, name_len, ret;
679 avio_rl64(pb); // reserved 16 bytes
680 avio_rl64(pb); // ...
681 count = avio_rl32(pb); // markers count
682 avio_rl16(pb); // reserved 2 bytes
683 name_len = avio_rl16(pb); // name length
684 for (i = 0; i < name_len; i++)
685 avio_r8(pb); // skip the name
687 for (i = 0; i < count; i++) {
691 avio_rl64(pb); // offset, 8 bytes
692 pres_time = avio_rl64(pb); // presentation time
693 pres_time -= asf->hdr.preroll * 10000;
694 avio_rl16(pb); // entry length
695 avio_rl32(pb); // send time
696 avio_rl32(pb); // flags
697 name_len = avio_rl32(pb); // name length
698 if ((ret = avio_get_str16le(pb, name_len * 2, name,
699 sizeof(name))) < name_len)
700 avio_skip(pb, name_len - ret);
701 avpriv_new_chapter(s, i, (AVRational) { 1, 10000000 }, pres_time,
702 AV_NOPTS_VALUE, name);
708 static int asf_read_header(AVFormatContext *s)
710 ASFContext *asf = s->priv_data;
712 AVIOContext *pb = s->pb;
717 if (ff_guidcmp(&g, &ff_asf_header))
723 memset(&asf->asfid2avid, -1, sizeof(asf->asfid2avid));
725 uint64_t gpos = avio_tell(pb);
727 gsize = avio_rl64(pb);
729 if (!ff_guidcmp(&g, &ff_asf_data_header)) {
730 asf->data_object_offset = avio_tell(pb);
731 /* If not streaming, gsize is not unlimited (how?),
732 * and there is enough space in the file.. */
733 if (!(asf->hdr.flags & 0x01) && gsize >= 100)
734 asf->data_object_size = gsize - 24;
736 asf->data_object_size = (uint64_t)-1;
741 if (!ff_guidcmp(&g, &ff_asf_file_header)) {
742 int ret = asf_read_file_properties(s, gsize);
745 } else if (!ff_guidcmp(&g, &ff_asf_stream_header)) {
746 int ret = asf_read_stream_properties(s, gsize);
749 } else if (!ff_guidcmp(&g, &ff_asf_comment_header)) {
750 asf_read_content_desc(s, gsize);
751 } else if (!ff_guidcmp(&g, &ff_asf_language_guid)) {
752 asf_read_language_list(s, gsize);
753 } else if (!ff_guidcmp(&g, &ff_asf_extended_content_header)) {
754 asf_read_ext_content_desc(s, gsize);
755 } else if (!ff_guidcmp(&g, &ff_asf_metadata_header)) {
756 asf_read_metadata(s, gsize);
757 } else if (!ff_guidcmp(&g, &ff_asf_metadata_library_header)) {
758 asf_read_metadata(s, gsize);
759 } else if (!ff_guidcmp(&g, &ff_asf_ext_stream_header)) {
760 asf_read_ext_stream_properties(s, gsize);
762 // there could be a optional stream properties object to follow
763 // if so the next iteration will pick it up
765 } else if (!ff_guidcmp(&g, &ff_asf_head1_guid)) {
769 } else if (!ff_guidcmp(&g, &ff_asf_marker_header)) {
770 asf_read_marker(s, gsize);
771 } else if (pb->eof_reached) {
775 if (!ff_guidcmp(&g, &ff_asf_content_encryption)) {
776 av_log(s, AV_LOG_WARNING,
777 "DRM protected stream detected, decoding will likely fail!\n");
778 } else if (!ff_guidcmp(&g, &ff_asf_ext_content_encryption)) {
779 av_log(s, AV_LOG_WARNING,
780 "Ext DRM protected stream detected, decoding will likely fail!\n");
781 } else if (!ff_guidcmp(&g, &ff_asf_digital_signature)) {
782 av_log(s, AV_LOG_WARNING,
783 "Digital signature detected, decoding will likely fail!\n");
787 if (avio_tell(pb) != gpos + gsize)
788 av_log(s, AV_LOG_DEBUG,
789 "gpos mismatch our pos=%"PRIu64", end=%"PRId64"\n",
790 avio_tell(pb) - gpos, gsize);
791 avio_seek(pb, gpos + gsize, SEEK_SET);
799 asf->data_offset = avio_tell(pb);
800 asf->packet_size_left = 0;
802 for (i = 0; i < 128; i++) {
803 int stream_num = asf->asfid2avid[i];
804 if (stream_num >= 0) {
805 AVStream *st = s->streams[stream_num];
806 if (!st->codec->bit_rate)
807 st->codec->bit_rate = asf->stream_bitrates[i];
808 if (asf->dar[i].num > 0 && asf->dar[i].den > 0) {
809 av_reduce(&st->sample_aspect_ratio.num,
810 &st->sample_aspect_ratio.den,
811 asf->dar[i].num, asf->dar[i].den, INT_MAX);
812 } else if ((asf->dar[0].num > 0) && (asf->dar[0].den > 0) &&
813 // Use ASF container value if the stream doesn't set AR.
814 (st->codec->codec_type == AVMEDIA_TYPE_VIDEO))
815 av_reduce(&st->sample_aspect_ratio.num,
816 &st->sample_aspect_ratio.den,
817 asf->dar[0].num, asf->dar[0].den, INT_MAX);
819 av_dlog(s, "i=%d, st->codec->codec_type:%d, asf->dar %d:%d sar=%d:%d\n",
820 i, st->codec->codec_type, asf->dar[i].num, asf->dar[i].den,
821 st->sample_aspect_ratio.num, st->sample_aspect_ratio.den);
823 // copy and convert language codes to the frontend
824 if (asf->streams[i].stream_language_index < 128) {
825 const char *rfc1766 = asf->stream_languages[asf->streams[i].stream_language_index];
826 if (rfc1766 && strlen(rfc1766) > 1) {
827 const char primary_tag[3] = { rfc1766[0], rfc1766[1], '\0' }; // ignore country code if any
828 const char *iso6392 = av_convert_lang_to(primary_tag,
829 AV_LANG_ISO639_2_BIBL);
831 av_dict_set(&st->metadata, "language", iso6392, 0);
837 ff_metadata_conv(&s->metadata, NULL, ff_asf_metadata_conv);
842 #define DO_2BITS(bits, var, defval) \
843 switch (bits & 3) { \
845 var = avio_rl32(pb); \
849 var = avio_rl16(pb); \
862 * Load a single ASF packet into the demuxer.
863 * @param s demux context
864 * @param pb context to read data from
865 * @return 0 on success, <0 on error
867 static int asf_get_packet(AVFormatContext *s, AVIOContext *pb)
869 ASFContext *asf = s->priv_data;
870 uint32_t packet_length, padsize;
874 // if we do not know packet size, allow skipping up to 32 kB
876 if (asf->no_resync_search)
878 else if (s->packet_size > 0)
879 off = (avio_tell(pb) - s->data_offset) % s->packet_size + 3;
886 if (c == 0x82 && !d && !e)
891 /* This code allows handling of -EAGAIN at packet boundaries (i.e.
892 * if the packet sync code above triggers -EAGAIN). This does not
893 * imply complete -EAGAIN handling support at random positions in
895 if (pb->error == AVERROR(EAGAIN))
896 return AVERROR(EAGAIN);
897 if (!pb->eof_reached)
898 av_log(s, AV_LOG_ERROR,
899 "ff asf bad header %x at:%"PRId64"\n", c, avio_tell(pb));
901 if ((c & 0x8f) == 0x82) {
903 if (!pb->eof_reached)
904 av_log(s, AV_LOG_ERROR, "ff asf bad non zero\n");
910 } else if (!pb->eof_reached) {
911 avio_seek(pb, -1, SEEK_CUR); // FIXME
914 asf->packet_flags = c;
915 asf->packet_property = d;
917 DO_2BITS(asf->packet_flags >> 5, packet_length, s->packet_size);
918 DO_2BITS(asf->packet_flags >> 1, padsize, 0); // sequence ignored
919 DO_2BITS(asf->packet_flags >> 3, padsize, 0); // padding length
921 // the following checks prevent overflows and infinite loops
922 if (!packet_length || packet_length >= (1U << 29)) {
923 av_log(s, AV_LOG_ERROR,
924 "invalid packet_length %d at:%"PRId64"\n",
925 packet_length, avio_tell(pb));
928 if (padsize >= packet_length) {
929 av_log(s, AV_LOG_ERROR,
930 "invalid padsize %d at:%"PRId64"\n", padsize, avio_tell(pb));
934 asf->packet_timestamp = avio_rl32(pb);
935 avio_rl16(pb); /* duration */
936 // rsize has at least 11 bytes which have to be present
938 if (asf->packet_flags & 0x01) {
939 asf->packet_segsizetype = avio_r8(pb);
941 asf->packet_segments = asf->packet_segsizetype & 0x3f;
943 asf->packet_segments = 1;
944 asf->packet_segsizetype = 0x80;
946 if (rsize > packet_length - padsize) {
947 asf->packet_size_left = 0;
948 av_log(s, AV_LOG_ERROR,
949 "invalid packet header length %d for pktlen %d-%d at %"PRId64"\n",
950 rsize, packet_length, padsize, avio_tell(pb));
953 asf->packet_size_left = packet_length - padsize - rsize;
954 if (packet_length < asf->hdr.min_pktsize)
955 padsize += asf->hdr.min_pktsize - packet_length;
956 asf->packet_padsize = padsize;
957 av_dlog(s, "packet: size=%d padsize=%d left=%d\n",
958 s->packet_size, asf->packet_padsize, asf->packet_size_left);
964 * @return <0 if error
966 static int asf_read_frame_header(AVFormatContext *s, AVIOContext *pb)
968 ASFContext *asf = s->priv_data;
970 int num = avio_r8(pb);
973 asf->packet_segments--;
974 asf->packet_key_frame = num >> 7;
975 asf->stream_index = asf->asfid2avid[num & 0x7f];
976 // sequence should be ignored!
977 DO_2BITS(asf->packet_property >> 4, asf->packet_seq, 0);
978 DO_2BITS(asf->packet_property >> 2, asf->packet_frag_offset, 0);
979 DO_2BITS(asf->packet_property, asf->packet_replic_size, 0);
980 av_dlog(asf, "key:%d stream:%d seq:%d offset:%d replic_size:%d\n",
981 asf->packet_key_frame, asf->stream_index, asf->packet_seq,
982 asf->packet_frag_offset, asf->packet_replic_size);
983 if (asf->packet_replic_size >= 8) {
984 asf->packet_obj_size = avio_rl32(pb);
985 if (asf->packet_obj_size >= (1 << 24) || asf->packet_obj_size <= 0) {
986 av_log(s, AV_LOG_ERROR, "packet_obj_size invalid\n");
989 asf->packet_frag_timestamp = avio_rl32(pb); // timestamp
990 if (asf->packet_replic_size >= 8 + 38 + 4) {
996 avio_skip(pb, asf->packet_replic_size - 8 - 38 - 4);
998 asf->packet_frag_timestamp = ts0 / 10000;
1000 asf->packet_frag_timestamp = AV_NOPTS_VALUE;
1002 avio_skip(pb, asf->packet_replic_size - 8);
1003 rsize += asf->packet_replic_size; // FIXME - check validity
1004 } else if (asf->packet_replic_size == 1) {
1005 // multipacket - frag_offset is beginning timestamp
1006 asf->packet_time_start = asf->packet_frag_offset;
1007 asf->packet_frag_offset = 0;
1008 asf->packet_frag_timestamp = asf->packet_timestamp;
1010 asf->packet_time_delta = avio_r8(pb);
1012 } else if (asf->packet_replic_size != 0) {
1013 av_log(s, AV_LOG_ERROR, "unexpected packet_replic_size of %d\n",
1014 asf->packet_replic_size);
1017 if (asf->packet_flags & 0x01) {
1018 DO_2BITS(asf->packet_segsizetype >> 6, asf->packet_frag_size, 0); // 0 is illegal
1019 if (rsize > asf->packet_size_left) {
1020 av_log(s, AV_LOG_ERROR, "packet_replic_size is invalid\n");
1022 } else if (asf->packet_frag_size > asf->packet_size_left - rsize) {
1023 if (asf->packet_frag_size > asf->packet_size_left - rsize + asf->packet_padsize) {
1024 av_log(s, AV_LOG_ERROR, "packet_frag_size is invalid (%d-%d)\n",
1025 asf->packet_size_left, rsize);
1028 int diff = asf->packet_frag_size - (asf->packet_size_left - rsize);
1029 asf->packet_size_left += diff;
1030 asf->packet_padsize -= diff;
1034 if (rsize > asf->packet_size_left) {
1035 av_log(s, AV_LOG_ERROR, "packet_replic_size is invalid\n");
1038 asf->packet_frag_size = asf->packet_size_left - rsize;
1040 if (asf->packet_replic_size == 1) {
1041 asf->packet_multi_size = asf->packet_frag_size;
1042 if (asf->packet_multi_size > asf->packet_size_left)
1045 asf->packet_size_left -= rsize;
1051 * Parse data from individual ASF packets (which were previously loaded
1052 * with asf_get_packet()).
1053 * @param s demux context
1054 * @param pb context to read data from
1055 * @param pkt pointer to store packet data into
1056 * @return 0 if data was stored in pkt, <0 on error or 1 if more ASF
1057 * packets need to be loaded (through asf_get_packet())
1059 static int asf_parse_packet(AVFormatContext *s, AVIOContext *pb, AVPacket *pkt)
1061 ASFContext *asf = s->priv_data;
1062 ASFStream *asf_st = 0;
1066 if (pb->eof_reached)
1069 if (asf->packet_size_left < FRAME_HEADER_SIZE ||
1070 asf->packet_segments < 1) {
1071 int ret = asf->packet_size_left + asf->packet_padsize;
1077 asf->packet_pos = avio_tell(pb);
1078 if (asf->data_object_size != (uint64_t)-1 &&
1079 (asf->packet_pos - asf->data_object_offset >= asf->data_object_size))
1080 return AVERROR_EOF; /* Do not exceed the size of the data object */
1083 if (asf->packet_time_start == 0) {
1084 if (asf_read_frame_header(s, pb) < 0) {
1085 asf->packet_segments = 0;
1088 if (asf->stream_index < 0 ||
1089 s->streams[asf->stream_index]->discard >= AVDISCARD_ALL ||
1090 (!asf->packet_key_frame &&
1091 s->streams[asf->stream_index]->discard >= AVDISCARD_NONKEY)) {
1092 asf->packet_time_start = 0;
1093 /* unhandled packet (should not happen) */
1094 avio_skip(pb, asf->packet_frag_size);
1095 asf->packet_size_left -= asf->packet_frag_size;
1096 if (asf->stream_index < 0)
1097 av_log(s, AV_LOG_ERROR, "ff asf skip %d (unknown stream)\n",
1098 asf->packet_frag_size);
1101 asf->asf_st = s->streams[asf->stream_index]->priv_data;
1103 asf_st = asf->asf_st;
1106 if (asf->packet_replic_size == 1) {
1107 // frag_offset is here used as the beginning timestamp
1108 asf->packet_frag_timestamp = asf->packet_time_start;
1109 asf->packet_time_start += asf->packet_time_delta;
1110 asf->packet_obj_size = asf->packet_frag_size = avio_r8(pb);
1111 asf->packet_size_left--;
1112 asf->packet_multi_size--;
1113 if (asf->packet_multi_size < asf->packet_obj_size) {
1114 asf->packet_time_start = 0;
1115 avio_skip(pb, asf->packet_multi_size);
1116 asf->packet_size_left -= asf->packet_multi_size;
1119 asf->packet_multi_size -= asf->packet_obj_size;
1121 if (asf_st->frag_offset + asf->packet_frag_size <= asf_st->pkt.size &&
1122 asf_st->frag_offset + asf->packet_frag_size > asf->packet_obj_size) {
1123 av_log(s, AV_LOG_INFO, "ignoring invalid packet_obj_size (%d %d %d %d)\n",
1124 asf_st->frag_offset, asf->packet_frag_size,
1125 asf->packet_obj_size, asf_st->pkt.size);
1126 asf->packet_obj_size = asf_st->pkt.size;
1129 if (asf_st->pkt.size != asf->packet_obj_size ||
1130 // FIXME is this condition sufficient?
1131 asf_st->frag_offset + asf->packet_frag_size > asf_st->pkt.size) {
1132 if (asf_st->pkt.data) {
1133 av_log(s, AV_LOG_INFO,
1134 "freeing incomplete packet size %d, new %d\n",
1135 asf_st->pkt.size, asf->packet_obj_size);
1136 asf_st->frag_offset = 0;
1137 av_free_packet(&asf_st->pkt);
1140 av_new_packet(&asf_st->pkt, asf->packet_obj_size);
1141 asf_st->seq = asf->packet_seq;
1142 asf_st->pkt.dts = asf->packet_frag_timestamp - asf->hdr.preroll;
1143 asf_st->pkt.stream_index = asf->stream_index;
1144 asf_st->pkt.pos = asf_st->packet_pos = asf->packet_pos;
1146 if (asf_st->pkt.data && asf_st->palette_changed) {
1148 pal = av_packet_new_side_data(&asf_st->pkt, AV_PKT_DATA_PALETTE,
1151 av_log(s, AV_LOG_ERROR, "Cannot append palette to packet\n");
1153 memcpy(pal, asf_st->palette, AVPALETTE_SIZE);
1154 asf_st->palette_changed = 0;
1157 av_dlog(asf, "new packet: stream:%d key:%d packet_key:%d audio:%d size:%d\n",
1158 asf->stream_index, asf->packet_key_frame,
1159 asf_st->pkt.flags & AV_PKT_FLAG_KEY,
1160 s->streams[asf->stream_index]->codec->codec_type == AVMEDIA_TYPE_AUDIO,
1161 asf->packet_obj_size);
1162 if (s->streams[asf->stream_index]->codec->codec_type == AVMEDIA_TYPE_AUDIO)
1163 asf->packet_key_frame = 1;
1164 if (asf->packet_key_frame)
1165 asf_st->pkt.flags |= AV_PKT_FLAG_KEY;
1169 av_dlog(asf, "READ PACKET s:%d os:%d o:%d,%d l:%d DATA:%p\n",
1170 s->packet_size, asf_st->pkt.size, asf->packet_frag_offset,
1171 asf_st->frag_offset, asf->packet_frag_size, asf_st->pkt.data);
1172 asf->packet_size_left -= asf->packet_frag_size;
1173 if (asf->packet_size_left < 0)
1176 if (asf->packet_frag_offset >= asf_st->pkt.size ||
1177 asf->packet_frag_size > asf_st->pkt.size - asf->packet_frag_offset) {
1178 av_log(s, AV_LOG_ERROR,
1179 "packet fragment position invalid %u,%u not in %u\n",
1180 asf->packet_frag_offset, asf->packet_frag_size,
1185 ret = avio_read(pb, asf_st->pkt.data + asf->packet_frag_offset,
1186 asf->packet_frag_size);
1187 if (ret != asf->packet_frag_size) {
1188 if (ret < 0 || asf->packet_frag_offset + ret == 0)
1189 return ret < 0 ? ret : AVERROR_EOF;
1191 if (asf_st->ds_span > 1) {
1192 // scrambling, we can either drop it completely or fill the remainder
1193 // TODO: should we fill the whole packet instead of just the current
1195 memset(asf_st->pkt.data + asf->packet_frag_offset + ret, 0,
1196 asf->packet_frag_size - ret);
1197 ret = asf->packet_frag_size;
1199 // no scrambling, so we can return partial packets
1200 av_shrink_packet(&asf_st->pkt, asf->packet_frag_offset + ret);
1203 if (s->key && s->keylen == 20)
1204 ff_asfcrypt_dec(s->key, asf_st->pkt.data + asf->packet_frag_offset,
1206 asf_st->frag_offset += ret;
1207 /* test if whole packet is read */
1208 if (asf_st->frag_offset == asf_st->pkt.size) {
1209 // workaround for macroshit radio DVR-MS files
1210 if (s->streams[asf->stream_index]->codec->codec_id == AV_CODEC_ID_MPEG2VIDEO &&
1211 asf_st->pkt.size > 100) {
1213 for (i = 0; i < asf_st->pkt.size && !asf_st->pkt.data[i]; i++)
1215 if (i == asf_st->pkt.size) {
1216 av_log(s, AV_LOG_DEBUG, "discarding ms fart\n");
1217 asf_st->frag_offset = 0;
1218 av_free_packet(&asf_st->pkt);
1224 if (asf_st->ds_span > 1) {
1225 if (asf_st->pkt.size != asf_st->ds_packet_size * asf_st->ds_span) {
1226 av_log(s, AV_LOG_ERROR,
1227 "pkt.size != ds_packet_size * ds_span (%d %d %d)\n",
1228 asf_st->pkt.size, asf_st->ds_packet_size,
1231 /* packet descrambling */
1232 AVBufferRef *buf = av_buffer_alloc(asf_st->pkt.size +
1233 FF_INPUT_BUFFER_PADDING_SIZE);
1235 uint8_t *newdata = buf->data;
1237 memset(newdata + asf_st->pkt.size, 0,
1238 FF_INPUT_BUFFER_PADDING_SIZE);
1239 while (offset < asf_st->pkt.size) {
1240 int off = offset / asf_st->ds_chunk_size;
1241 int row = off / asf_st->ds_span;
1242 int col = off % asf_st->ds_span;
1243 int idx = row + col * asf_st->ds_packet_size / asf_st->ds_chunk_size;
1244 assert(offset + asf_st->ds_chunk_size <= asf_st->pkt.size);
1245 assert(idx + 1 <= asf_st->pkt.size / asf_st->ds_chunk_size);
1246 memcpy(newdata + offset,
1247 asf_st->pkt.data + idx * asf_st->ds_chunk_size,
1248 asf_st->ds_chunk_size);
1249 offset += asf_st->ds_chunk_size;
1251 av_buffer_unref(&asf_st->pkt.buf);
1252 asf_st->pkt.buf = buf;
1253 asf_st->pkt.data = buf->data;
1257 asf_st->frag_offset = 0;
1259 #if FF_API_DESTRUCT_PACKET
1260 FF_DISABLE_DEPRECATION_WARNINGS
1261 asf_st->pkt.destruct = NULL;
1262 FF_ENABLE_DEPRECATION_WARNINGS
1264 asf_st->pkt.buf = 0;
1265 asf_st->pkt.size = 0;
1266 asf_st->pkt.data = 0;
1267 asf_st->pkt.side_data_elems = 0;
1268 asf_st->pkt.side_data = NULL;
1269 break; // packet completed
1275 static int asf_read_packet(AVFormatContext *s, AVPacket *pkt)
1277 ASFContext *asf = s->priv_data;
1282 /* parse cached packets, if any */
1283 if ((ret = asf_parse_packet(s, s->pb, pkt)) <= 0)
1285 if ((ret = asf_get_packet(s, s->pb)) < 0)
1286 assert(asf->packet_size_left < FRAME_HEADER_SIZE ||
1287 asf->packet_segments < 1);
1288 asf->packet_time_start = 0;
1292 // Added to support seeking after packets have been read
1293 // If information is not reset, read_packet fails due to
1294 // leftover information from previous reads
1295 static void asf_reset_header(AVFormatContext *s)
1297 ASFContext *asf = s->priv_data;
1301 asf->packet_size_left = 0;
1302 asf->packet_segments = 0;
1303 asf->packet_flags = 0;
1304 asf->packet_property = 0;
1305 asf->packet_timestamp = 0;
1306 asf->packet_segsizetype = 0;
1307 asf->packet_segments = 0;
1308 asf->packet_seq = 0;
1309 asf->packet_replic_size = 0;
1310 asf->packet_key_frame = 0;
1311 asf->packet_padsize = 0;
1312 asf->packet_frag_offset = 0;
1313 asf->packet_frag_size = 0;
1314 asf->packet_frag_timestamp = 0;
1315 asf->packet_multi_size = 0;
1316 asf->packet_obj_size = 0;
1317 asf->packet_time_delta = 0;
1318 asf->packet_time_start = 0;
1320 for (i = 0; i < s->nb_streams; i++) {
1321 asf_st = s->streams[i]->priv_data;
1324 av_free_packet(&asf_st->pkt);
1325 asf_st->frag_offset = 0;
1331 static int asf_read_close(AVFormatContext *s)
1333 asf_reset_header(s);
1338 static int64_t asf_read_pts(AVFormatContext *s, int stream_index,
1339 int64_t *ppos, int64_t pos_limit)
1341 AVPacket pkt1, *pkt = &pkt1;
1344 int64_t pos = *ppos;
1346 int64_t start_pos[ASF_MAX_STREAMS];
1348 for (i = 0; i < s->nb_streams; i++)
1351 if (s->packet_size > 0)
1352 pos = (pos + s->packet_size - 1 - s->data_offset) /
1353 s->packet_size * s->packet_size +
1356 avio_seek(s->pb, pos, SEEK_SET);
1358 asf_reset_header(s);
1360 if (asf_read_packet(s, pkt) < 0) {
1361 av_log(s, AV_LOG_INFO, "asf_read_pts failed\n");
1362 return AV_NOPTS_VALUE;
1367 av_free_packet(pkt);
1368 if (pkt->flags & AV_PKT_FLAG_KEY) {
1369 i = pkt->stream_index;
1371 asf_st = s->streams[i]->priv_data;
1374 // assert((asf_st->packet_pos - s->data_offset) % s->packet_size == 0);
1375 pos = asf_st->packet_pos;
1377 av_add_index_entry(s->streams[i], pos, pts, pkt->size,
1378 pos - start_pos[i] + 1, AVINDEX_KEYFRAME);
1379 start_pos[i] = asf_st->packet_pos + 1;
1381 if (pkt->stream_index == stream_index)
1390 static void asf_build_simple_index(AVFormatContext *s, int stream_index)
1393 ASFContext *asf = s->priv_data;
1394 int64_t current_pos = avio_tell(s->pb);
1397 avio_seek(s->pb, asf->data_object_offset + asf->data_object_size, SEEK_SET);
1398 ff_get_guid(s->pb, &g);
1400 /* the data object can be followed by other top-level objects,
1401 * skip them until the simple index object is reached */
1402 while (ff_guidcmp(&g, &index_guid)) {
1403 int64_t gsize = avio_rl64(s->pb);
1404 if (gsize < 24 || s->pb->eof_reached) {
1405 avio_seek(s->pb, current_pos, SEEK_SET);
1408 avio_skip(s->pb, gsize - 24);
1409 ff_get_guid(s->pb, &g);
1413 int64_t itime, last_pos = -1;
1415 int64_t av_unused gsize = avio_rl64(s->pb);
1416 ff_get_guid(s->pb, &g);
1417 itime = avio_rl64(s->pb);
1418 pct = avio_rl32(s->pb);
1419 ict = avio_rl32(s->pb);
1420 av_log(s, AV_LOG_DEBUG,
1421 "itime:0x%"PRIx64", pct:%d, ict:%d\n", itime, pct, ict);
1423 for (i = 0; i < ict; i++) {
1424 int pktnum = avio_rl32(s->pb);
1425 int pktct = avio_rl16(s->pb);
1426 int64_t pos = s->data_offset + s->packet_size * (int64_t)pktnum;
1427 int64_t index_pts = FFMAX(av_rescale(itime, i, 10000) - asf->hdr.preroll, 0);
1429 if (pos != last_pos) {
1430 av_log(s, AV_LOG_DEBUG, "pktnum:%d, pktct:%d pts: %"PRId64"\n",
1431 pktnum, pktct, index_pts);
1432 av_add_index_entry(s->streams[stream_index], pos, index_pts,
1433 s->packet_size, 0, AVINDEX_KEYFRAME);
1437 asf->index_read = ict > 0;
1439 avio_seek(s->pb, current_pos, SEEK_SET);
1442 static int asf_read_seek(AVFormatContext *s, int stream_index,
1443 int64_t pts, int flags)
1445 ASFContext *asf = s->priv_data;
1446 AVStream *st = s->streams[stream_index];
1450 if (s->packet_size <= 0)
1453 /* Try using the protocol's read_seek if available */
1455 int ret = avio_seek_time(s->pb, stream_index, pts, flags);
1457 asf_reset_header(s);
1458 if (ret != AVERROR(ENOSYS))
1462 if (!asf->index_read)
1463 asf_build_simple_index(s, stream_index);
1465 if ((asf->index_read && st->index_entries)) {
1466 index = av_index_search_timestamp(st, pts, flags);
1468 /* find the position */
1469 pos = st->index_entries[index].pos;
1472 av_log(s, AV_LOG_DEBUG, "SEEKTO: %"PRId64"\n", pos);
1473 avio_seek(s->pb, pos, SEEK_SET);
1474 asf_reset_header(s);
1478 /* no index or seeking by index failed */
1479 if (ff_seek_frame_binary(s, stream_index, pts, flags) < 0)
1481 asf_reset_header(s);
1485 AVInputFormat ff_asf_demuxer = {
1487 .long_name = NULL_IF_CONFIG_SMALL("ASF (Advanced / Active Streaming Format)"),
1488 .priv_data_size = sizeof(ASFContext),
1489 .read_probe = asf_probe,
1490 .read_header = asf_read_header,
1491 .read_packet = asf_read_packet,
1492 .read_close = asf_read_close,
1493 .read_seek = asf_read_seek,
1494 .read_timestamp = asf_read_pts,
1495 .flags = AVFMT_NOBINSEARCH | AVFMT_NOGENSEARCH,
1496 .priv_class = &asf_class,