2 * ASF compatible demuxer
3 * Copyright (c) 2000, 2001 Fabrice Bellard
5 * This file is part of FFmpeg.
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
24 #include "libavutil/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 16
100 // Fix Me! FRAME_HEADER_SIZE may be different. (17 is known to be too large)
103 static const ff_asf_guid stream_bitrate_guid = { /* (http://get.to/sdp) */
104 0xce, 0x75, 0xf8, 0x7b, 0x8d, 0x46, 0xd1, 0x11, 0x8d, 0x82, 0x00, 0x60, 0x97, 0xc9, 0xa2, 0xb2
107 #define PRINT_IF_GUID(g, cmp) \
108 if (!ff_guidcmp(g, &cmp)) \
109 av_dlog(NULL, "(GUID: %s) ", # cmp)
111 static void print_guid(const ff_asf_guid *g)
114 PRINT_IF_GUID(g, ff_asf_header);
115 else PRINT_IF_GUID(g, ff_asf_file_header);
116 else PRINT_IF_GUID(g, ff_asf_stream_header);
117 else PRINT_IF_GUID(g, ff_asf_audio_stream);
118 else PRINT_IF_GUID(g, ff_asf_audio_conceal_none);
119 else PRINT_IF_GUID(g, ff_asf_video_stream);
120 else PRINT_IF_GUID(g, ff_asf_video_conceal_none);
121 else PRINT_IF_GUID(g, ff_asf_command_stream);
122 else PRINT_IF_GUID(g, ff_asf_comment_header);
123 else PRINT_IF_GUID(g, ff_asf_codec_comment_header);
124 else PRINT_IF_GUID(g, ff_asf_codec_comment1_header);
125 else PRINT_IF_GUID(g, ff_asf_data_header);
126 else PRINT_IF_GUID(g, ff_asf_simple_index_header);
127 else PRINT_IF_GUID(g, ff_asf_head1_guid);
128 else PRINT_IF_GUID(g, ff_asf_head2_guid);
129 else PRINT_IF_GUID(g, ff_asf_my_guid);
130 else PRINT_IF_GUID(g, ff_asf_ext_stream_header);
131 else PRINT_IF_GUID(g, ff_asf_extended_content_header);
132 else PRINT_IF_GUID(g, ff_asf_ext_stream_embed_stream_header);
133 else PRINT_IF_GUID(g, ff_asf_ext_stream_audio_stream);
134 else PRINT_IF_GUID(g, ff_asf_metadata_header);
135 else PRINT_IF_GUID(g, ff_asf_marker_header);
136 else PRINT_IF_GUID(g, stream_bitrate_guid);
137 else PRINT_IF_GUID(g, ff_asf_language_guid);
139 av_dlog(NULL, "(GUID: unknown) ");
140 for (i = 0; i < 16; i++)
141 av_dlog(NULL, " 0x%02x,", (*g)[i]);
142 av_dlog(NULL, "}\n");
146 #define print_guid(g)
149 static int asf_probe(AVProbeData *pd)
151 /* check file header */
152 if (!ff_guidcmp(pd->buf, &ff_asf_header))
153 return AVPROBE_SCORE_MAX;
158 static int get_value(AVIOContext *pb, int type)
162 return avio_rl32(pb);
164 return avio_rl32(pb);
166 return avio_rl64(pb);
168 return avio_rl16(pb);
174 /* MSDN claims that this should be "compatible with the ID3 frame, APIC",
175 * but in reality this is only loosely similar */
176 static int asf_read_picture(AVFormatContext *s, int len)
178 AVPacket pkt = { 0 };
179 const CodecMime *mime = ff_id3v2_mime_tags;
180 enum AVCodecID id = AV_CODEC_ID_NONE;
182 uint8_t *desc = NULL;
183 ASFStream *ast = NULL;
185 int ret, type, picsize, desc_len;
187 /* type + picsize + mime + desc */
188 if (len < 1 + 4 + 2 + 2) {
189 av_log(s, AV_LOG_ERROR, "Invalid attached picture size: %d.\n", len);
190 return AVERROR_INVALIDDATA;
194 type = avio_r8(s->pb);
196 if (type >= FF_ARRAY_ELEMS(ff_id3v2_picture_types) || type < 0) {
197 av_log(s, AV_LOG_WARNING, "Unknown attached picture type: %d.\n", type);
201 /* picture data size */
202 picsize = avio_rl32(s->pb);
205 /* picture MIME type */
206 len -= avio_get_str16le(s->pb, len, mimetype, sizeof(mimetype));
207 while (mime->id != AV_CODEC_ID_NONE) {
208 if (!strncmp(mime->str, mimetype, sizeof(mimetype))) {
214 if (id == AV_CODEC_ID_NONE) {
215 av_log(s, AV_LOG_ERROR, "Unknown attached picture mimetype: %s.\n",
220 if (picsize >= len) {
221 av_log(s, AV_LOG_ERROR, "Invalid attached picture data size: %d >= %d.\n",
223 return AVERROR_INVALIDDATA;
226 /* picture description */
227 desc_len = (len - picsize) * 2 + 1;
228 desc = av_malloc(desc_len);
230 return AVERROR(ENOMEM);
231 len -= avio_get_str16le(s->pb, len - picsize, desc, desc_len);
233 ret = av_get_packet(s->pb, &pkt, picsize);
237 st = avformat_new_stream(s, NULL);
238 ast = av_mallocz(sizeof(*ast));
240 ret = AVERROR(ENOMEM);
244 st->disposition |= AV_DISPOSITION_ATTACHED_PIC;
245 st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
246 st->codec->codec_id = id;
247 st->attached_pic = pkt;
248 st->attached_pic.stream_index = st->index;
249 st->attached_pic.flags |= AV_PKT_FLAG_KEY;
252 av_dict_set(&st->metadata, "title", desc, AV_DICT_DONT_STRDUP_VAL);
256 av_dict_set(&st->metadata, "comment", ff_id3v2_picture_types[type], 0);
263 av_free_packet(&pkt);
267 static void get_tag(AVFormatContext *s, const char *key, int type, int len)
270 int64_t off = avio_tell(s->pb);
272 if ((unsigned)len >= (UINT_MAX - 1) / 2)
275 value = av_malloc(2 * len + 1);
279 if (type == 0) { // UTF16-LE
280 avio_get_str16le(s->pb, len, value, 2 * len + 1);
281 } else if (type == -1) { // ASCII
282 avio_read(s->pb, value, len);
284 } else if (type > 1 && type <= 5) { // boolean or DWORD or QWORD or WORD
285 uint64_t num = get_value(s->pb, type);
286 snprintf(value, len, "%"PRIu64, num);
287 } else if (type == 1 && !strcmp(key, "WM/Picture")) { // handle cover art
288 asf_read_picture(s, len);
291 av_log(s, AV_LOG_DEBUG,
292 "Unsupported value type %d in tag %s.\n", type, key);
296 av_dict_set(&s->metadata, key, value, 0);
300 avio_seek(s->pb, off + len, SEEK_SET);
303 static int asf_read_file_properties(AVFormatContext *s, int64_t size)
305 ASFContext *asf = s->priv_data;
306 AVIOContext *pb = s->pb;
308 ff_get_guid(pb, &asf->hdr.guid);
309 asf->hdr.file_size = avio_rl64(pb);
310 asf->hdr.create_time = avio_rl64(pb);
311 avio_rl64(pb); /* number of packets */
312 asf->hdr.play_time = avio_rl64(pb);
313 asf->hdr.send_time = avio_rl64(pb);
314 asf->hdr.preroll = avio_rl32(pb);
315 asf->hdr.ignore = avio_rl32(pb);
316 asf->hdr.flags = avio_rl32(pb);
317 asf->hdr.min_pktsize = avio_rl32(pb);
318 asf->hdr.max_pktsize = avio_rl32(pb);
319 if (asf->hdr.min_pktsize >= (1U << 29))
320 return AVERROR_INVALIDDATA;
321 asf->hdr.max_bitrate = avio_rl32(pb);
322 s->packet_size = asf->hdr.max_pktsize;
327 static int asf_read_stream_properties(AVFormatContext *s, int64_t size)
329 ASFContext *asf = s->priv_data;
330 AVIOContext *pb = s->pb;
334 enum AVMediaType type;
335 int type_specific_size, sizeX;
337 int64_t pos1, pos2, start_time;
338 int test_for_ext_stream_audio, is_dvr_ms_audio = 0;
340 if (s->nb_streams == ASF_MAX_STREAMS) {
341 av_log(s, AV_LOG_ERROR, "too many streams\n");
342 return AVERROR(EINVAL);
345 pos1 = avio_tell(pb);
347 st = avformat_new_stream(s, NULL);
349 return AVERROR(ENOMEM);
350 avpriv_set_pts_info(st, 32, 1, 1000); /* 32 bit pts in ms */
351 asf_st = av_mallocz(sizeof(ASFStream));
353 return AVERROR(ENOMEM);
354 st->priv_data = asf_st;
355 start_time = asf->hdr.preroll;
357 asf_st->stream_language_index = 128; // invalid stream index means no language info
359 if (!(asf->hdr.flags & 0x01)) { // if we aren't streaming...
360 int64_t fsize = avio_size(pb);
361 if (fsize <= 0 || (int64_t)asf->hdr.file_size <= 0 || FFABS(fsize - (int64_t)asf->hdr.file_size) < 10000)
362 st->duration = asf->hdr.play_time /
363 (10000000 / 1000) - start_time;
367 test_for_ext_stream_audio = 0;
368 if (!ff_guidcmp(&g, &ff_asf_audio_stream)) {
369 type = AVMEDIA_TYPE_AUDIO;
370 } else if (!ff_guidcmp(&g, &ff_asf_video_stream)) {
371 type = AVMEDIA_TYPE_VIDEO;
372 } else if (!ff_guidcmp(&g, &ff_asf_jfif_media)) {
373 type = AVMEDIA_TYPE_VIDEO;
374 st->codec->codec_id = AV_CODEC_ID_MJPEG;
375 } else if (!ff_guidcmp(&g, &ff_asf_command_stream)) {
376 type = AVMEDIA_TYPE_DATA;
377 } else if (!ff_guidcmp(&g, &ff_asf_ext_stream_embed_stream_header)) {
378 test_for_ext_stream_audio = 1;
379 type = AVMEDIA_TYPE_UNKNOWN;
384 avio_skip(pb, 8); /* total_size */
385 type_specific_size = avio_rl32(pb);
387 st->id = avio_rl16(pb) & 0x7f; /* stream id */
388 // mapping of asf ID to AV stream ID;
389 asf->asfid2avid[st->id] = s->nb_streams - 1;
393 if (test_for_ext_stream_audio) {
395 if (!ff_guidcmp(&g, &ff_asf_ext_stream_audio_stream)) {
396 type = AVMEDIA_TYPE_AUDIO;
407 st->codec->codec_type = type;
408 if (type == AVMEDIA_TYPE_AUDIO) {
409 int ret = ff_get_wav_header(pb, st->codec, type_specific_size);
412 if (is_dvr_ms_audio) {
413 // codec_id and codec_tag are unreliable in dvr_ms
414 // files. Set them later by probing stream.
415 st->request_probe = 1;
416 st->codec->codec_tag = 0;
418 if (st->codec->codec_id == AV_CODEC_ID_AAC)
419 st->need_parsing = AVSTREAM_PARSE_NONE;
421 st->need_parsing = AVSTREAM_PARSE_FULL;
422 /* We have to init the frame size at some point .... */
423 pos2 = avio_tell(pb);
424 if (size >= (pos2 + 8 - pos1 + 24)) {
425 asf_st->ds_span = avio_r8(pb);
426 asf_st->ds_packet_size = avio_rl16(pb);
427 asf_st->ds_chunk_size = avio_rl16(pb);
428 avio_rl16(pb); // ds_data_size
429 avio_r8(pb); // ds_silence_data
431 if (asf_st->ds_span > 1) {
432 if (!asf_st->ds_chunk_size ||
433 (asf_st->ds_packet_size / asf_st->ds_chunk_size <= 1) ||
434 asf_st->ds_packet_size % asf_st->ds_chunk_size)
435 asf_st->ds_span = 0; // disable descrambling
437 } else if (type == AVMEDIA_TYPE_VIDEO &&
438 size - (avio_tell(pb) - pos1 + 24) >= 51) {
442 avio_rl16(pb); /* size */
443 sizeX = avio_rl32(pb); /* size */
444 st->codec->width = avio_rl32(pb);
445 st->codec->height = avio_rl32(pb);
446 /* not available for asf */
447 avio_rl16(pb); /* panes */
448 st->codec->bits_per_coded_sample = avio_rl16(pb); /* depth */
449 tag1 = avio_rl32(pb);
452 st->codec->extradata_size = ffio_limit(pb, sizeX - 40);
453 st->codec->extradata = av_mallocz(st->codec->extradata_size +
454 FF_INPUT_BUFFER_PADDING_SIZE);
455 avio_read(pb, st->codec->extradata, st->codec->extradata_size);
458 /* Extract palette from extradata if bpp <= 8 */
459 /* This code assumes that extradata contains only palette */
460 /* This is true for all paletted codecs implemented in libavcodec */
461 if (st->codec->extradata_size && (st->codec->bits_per_coded_sample <= 8)) {
464 for (i = 0; i < FFMIN(st->codec->extradata_size, AVPALETTE_SIZE) / 4; i++)
465 asf_st->palette[i] = av_bswap32(((uint32_t *)st->codec->extradata)[i]);
467 memcpy(asf_st->palette, st->codec->extradata,
468 FFMIN(st->codec->extradata_size, AVPALETTE_SIZE));
470 asf_st->palette_changed = 1;
473 st->codec->codec_tag = tag1;
474 st->codec->codec_id = ff_codec_get_id(ff_codec_bmp_tags, tag1);
475 if (tag1 == MKTAG('D', 'V', 'R', ' ')) {
476 st->need_parsing = AVSTREAM_PARSE_FULL;
477 /* issue658 contains wrong w/h and MS even puts a fake seq header
478 * with wrong w/h in extradata while a correct one is in the stream.
479 * maximum lameness */
481 st->codec->height = 0;
482 av_freep(&st->codec->extradata);
483 st->codec->extradata_size = 0;
485 if (st->codec->codec_id == AV_CODEC_ID_H264)
486 st->need_parsing = AVSTREAM_PARSE_FULL_ONCE;
488 pos2 = avio_tell(pb);
489 avio_skip(pb, size - (pos2 - pos1 + 24));
494 static int asf_read_ext_stream_properties(AVFormatContext *s, int64_t size)
496 ASFContext *asf = s->priv_data;
497 AVIOContext *pb = s->pb;
499 int ext_len, payload_ext_ct, stream_ct, i;
500 uint32_t leak_rate, stream_num;
501 unsigned int stream_languageid_index;
503 avio_rl64(pb); // starttime
504 avio_rl64(pb); // endtime
505 leak_rate = avio_rl32(pb); // leak-datarate
506 avio_rl32(pb); // bucket-datasize
507 avio_rl32(pb); // init-bucket-fullness
508 avio_rl32(pb); // alt-leak-datarate
509 avio_rl32(pb); // alt-bucket-datasize
510 avio_rl32(pb); // alt-init-bucket-fullness
511 avio_rl32(pb); // max-object-size
512 avio_rl32(pb); // flags (reliable,seekable,no_cleanpoints?,resend-live-cleanpoints, rest of bits reserved)
513 stream_num = avio_rl16(pb); // stream-num
515 stream_languageid_index = avio_rl16(pb); // stream-language-id-index
516 if (stream_num < 128)
517 asf->streams[stream_num].stream_language_index = stream_languageid_index;
519 avio_rl64(pb); // avg frametime in 100ns units
520 stream_ct = avio_rl16(pb); // stream-name-count
521 payload_ext_ct = avio_rl16(pb); // payload-extension-system-count
523 if (stream_num < 128) {
524 asf->stream_bitrates[stream_num] = leak_rate;
525 asf->streams[stream_num].payload_ext_ct = 0;
528 for (i = 0; i < stream_ct; i++) {
530 ext_len = avio_rl16(pb);
531 avio_skip(pb, ext_len);
534 for (i = 0; i < payload_ext_ct; i++) {
537 size = avio_rl16(pb);
538 ext_len = avio_rl32(pb);
539 avio_skip(pb, ext_len);
540 if (stream_num < 128 && i < FF_ARRAY_ELEMS(asf->streams[stream_num].payload)) {
541 ASFPayload *p = &asf->streams[stream_num].payload[i];
544 av_log(s, AV_LOG_DEBUG, "Payload extension %x %d\n", g[0], p->size );
545 asf->streams[stream_num].payload_ext_ct ++;
552 static int asf_read_content_desc(AVFormatContext *s, int64_t size)
554 AVIOContext *pb = s->pb;
555 int len1, len2, len3, len4, len5;
557 len1 = avio_rl16(pb);
558 len2 = avio_rl16(pb);
559 len3 = avio_rl16(pb);
560 len4 = avio_rl16(pb);
561 len5 = avio_rl16(pb);
562 get_tag(s, "title", 0, len1);
563 get_tag(s, "author", 0, len2);
564 get_tag(s, "copyright", 0, len3);
565 get_tag(s, "comment", 0, len4);
571 static int asf_read_ext_content_desc(AVFormatContext *s, int64_t size)
573 AVIOContext *pb = s->pb;
574 ASFContext *asf = s->priv_data;
575 int desc_count, i, ret;
577 desc_count = avio_rl16(pb);
578 for (i = 0; i < desc_count; i++) {
579 int name_len, value_type, value_len;
582 name_len = avio_rl16(pb);
583 if (name_len % 2) // must be even, broken lavf versions wrote len-1
585 if ((ret = avio_get_str16le(pb, name_len, name, sizeof(name))) < name_len)
586 avio_skip(pb, name_len - ret);
587 value_type = avio_rl16(pb);
588 value_len = avio_rl16(pb);
589 if (!value_type && value_len % 2)
591 /* My sample has that stream set to 0 maybe that mean the container.
592 * ASF stream count starts at 1. I am using 0 to the container value
593 * since it's unused. */
594 if (!strcmp(name, "AspectRatioX"))
595 asf->dar[0].num = get_value(s->pb, value_type);
596 else if (!strcmp(name, "AspectRatioY"))
597 asf->dar[0].den = get_value(s->pb, value_type);
599 get_tag(s, name, value_type, value_len);
605 static int asf_read_language_list(AVFormatContext *s, int64_t size)
607 AVIOContext *pb = s->pb;
608 ASFContext *asf = s->priv_data;
610 int stream_count = avio_rl16(pb);
611 for (j = 0; j < stream_count; j++) {
613 unsigned int lang_len = avio_r8(pb);
614 if ((ret = avio_get_str16le(pb, lang_len, lang,
615 sizeof(lang))) < lang_len)
616 avio_skip(pb, lang_len - ret);
618 av_strlcpy(asf->stream_languages[j], lang,
619 sizeof(*asf->stream_languages));
625 static int asf_read_metadata(AVFormatContext *s, int64_t size)
627 AVIOContext *pb = s->pb;
628 ASFContext *asf = s->priv_data;
629 int n, stream_num, name_len, value_len, value_num;
633 for (i = 0; i < n; i++) {
635 int av_unused value_type;
637 avio_rl16(pb); // lang_list_index
638 stream_num = avio_rl16(pb);
639 name_len = avio_rl16(pb);
640 value_type = avio_rl16(pb); /* value_type */
641 value_len = avio_rl32(pb);
643 if ((ret = avio_get_str16le(pb, name_len, name, sizeof(name))) < name_len)
644 avio_skip(pb, name_len - ret);
645 av_dlog(s, "%d %d %d %d %d <%s>\n",
646 i, stream_num, name_len, value_type, value_len, name);
647 /* We should use get_value() here but it does not work 2 is le16
648 * here but le32 elsewhere. */
649 value_num = avio_rl16(pb);
650 avio_skip(pb, value_len - 2);
652 if (stream_num < 128) {
653 if (!strcmp(name, "AspectRatioX"))
654 asf->dar[stream_num].num = value_num;
655 else if (!strcmp(name, "AspectRatioY"))
656 asf->dar[stream_num].den = value_num;
663 static int asf_read_marker(AVFormatContext *s, int64_t size)
665 AVIOContext *pb = s->pb;
666 int i, count, name_len, ret;
669 avio_rl64(pb); // reserved 16 bytes
670 avio_rl64(pb); // ...
671 count = avio_rl32(pb); // markers count
672 avio_rl16(pb); // reserved 2 bytes
673 name_len = avio_rl16(pb); // name length
674 for (i = 0; i < name_len; i++)
675 avio_r8(pb); // skip the name
677 for (i = 0; i < count; i++) {
681 avio_rl64(pb); // offset, 8 bytes
682 pres_time = avio_rl64(pb); // presentation time
683 avio_rl16(pb); // entry length
684 avio_rl32(pb); // send time
685 avio_rl32(pb); // flags
686 name_len = avio_rl32(pb); // name length
687 if ((ret = avio_get_str16le(pb, name_len * 2, name,
688 sizeof(name))) < name_len)
689 avio_skip(pb, name_len - ret);
690 avpriv_new_chapter(s, i, (AVRational) { 1, 10000000 }, pres_time,
691 AV_NOPTS_VALUE, name);
697 static int asf_read_header(AVFormatContext *s)
699 ASFContext *asf = s->priv_data;
701 AVIOContext *pb = s->pb;
706 if (ff_guidcmp(&g, &ff_asf_header))
707 return AVERROR_INVALIDDATA;
712 memset(&asf->asfid2avid, -1, sizeof(asf->asfid2avid));
714 uint64_t gpos = avio_tell(pb);
716 gsize = avio_rl64(pb);
718 if (!ff_guidcmp(&g, &ff_asf_data_header)) {
719 asf->data_object_offset = avio_tell(pb);
720 /* If not streaming, gsize is not unlimited (how?),
721 * and there is enough space in the file.. */
722 if (!(asf->hdr.flags & 0x01) && gsize >= 100)
723 asf->data_object_size = gsize - 24;
725 asf->data_object_size = (uint64_t)-1;
729 return AVERROR_INVALIDDATA;
730 if (!ff_guidcmp(&g, &ff_asf_file_header)) {
731 int ret = asf_read_file_properties(s, gsize);
734 } else if (!ff_guidcmp(&g, &ff_asf_stream_header)) {
735 asf_read_stream_properties(s, gsize);
736 } else if (!ff_guidcmp(&g, &ff_asf_comment_header)) {
737 asf_read_content_desc(s, gsize);
738 } else if (!ff_guidcmp(&g, &ff_asf_language_guid)) {
739 asf_read_language_list(s, gsize);
740 } else if (!ff_guidcmp(&g, &ff_asf_extended_content_header)) {
741 asf_read_ext_content_desc(s, gsize);
742 } else if (!ff_guidcmp(&g, &ff_asf_metadata_header)) {
743 asf_read_metadata(s, gsize);
744 } else if (!ff_guidcmp(&g, &ff_asf_ext_stream_header)) {
745 asf_read_ext_stream_properties(s, gsize);
747 // there could be a optional stream properties object to follow
748 // if so the next iteration will pick it up
750 } else if (!ff_guidcmp(&g, &ff_asf_head1_guid)) {
754 } else if (!ff_guidcmp(&g, &ff_asf_marker_header)) {
755 asf_read_marker(s, gsize);
756 } else if (url_feof(pb)) {
760 if (!ff_guidcmp(&g, &ff_asf_content_encryption)) {
763 av_log(s, AV_LOG_WARNING,
764 "DRM protected stream detected, decoding will likely fail!\n");
766 av_log(s, AV_LOG_DEBUG, "Secret data:\n");
767 av_get_packet(pb, &pkt, len); av_hex_dump_log(s, AV_LOG_DEBUG, pkt.data, pkt.size); av_free_packet(&pkt);
769 get_tag(s, "ASF_Protection_Type", -1, len);
771 get_tag(s, "ASF_Key_ID", -1, len);
773 get_tag(s, "ASF_License_URL", -1, len);
774 } else if (!ff_guidcmp(&g, &ff_asf_ext_content_encryption)) {
775 av_log(s, AV_LOG_WARNING,
776 "Ext DRM protected stream detected, decoding will likely fail!\n");
777 av_dict_set(&s->metadata, "encryption", "ASF Extended Content Encryption", 0);
778 } else if (!ff_guidcmp(&g, &ff_asf_digital_signature)) {
779 av_log(s, AV_LOG_INFO, "Digital signature detected!\n");
783 if (avio_tell(pb) != gpos + gsize)
784 av_log(s, AV_LOG_DEBUG,
785 "gpos mismatch our pos=%"PRIu64", end=%"PRId64"\n",
786 avio_tell(pb) - gpos, gsize);
787 avio_seek(pb, gpos + gsize, SEEK_SET);
795 asf->data_offset = avio_tell(pb);
796 asf->packet_size_left = 0;
798 for (i = 0; i < 128; i++) {
799 int stream_num = asf->asfid2avid[i];
800 if (stream_num >= 0) {
801 AVStream *st = s->streams[stream_num];
802 if (!st->codec->bit_rate)
803 st->codec->bit_rate = asf->stream_bitrates[i];
804 if (asf->dar[i].num > 0 && asf->dar[i].den > 0) {
805 av_reduce(&st->sample_aspect_ratio.num,
806 &st->sample_aspect_ratio.den,
807 asf->dar[i].num, asf->dar[i].den, INT_MAX);
808 } else if ((asf->dar[0].num > 0) && (asf->dar[0].den > 0) &&
809 // Use ASF container value if the stream doesn't set AR.
810 (st->codec->codec_type == AVMEDIA_TYPE_VIDEO))
811 av_reduce(&st->sample_aspect_ratio.num,
812 &st->sample_aspect_ratio.den,
813 asf->dar[0].num, asf->dar[0].den, INT_MAX);
815 av_dlog(s, "i=%d, st->codec->codec_type:%d, asf->dar %d:%d sar=%d:%d\n",
816 i, st->codec->codec_type, asf->dar[i].num, asf->dar[i].den,
817 st->sample_aspect_ratio.num, st->sample_aspect_ratio.den);
819 // copy and convert language codes to the frontend
820 if (asf->streams[i].stream_language_index < 128) {
821 const char *rfc1766 = asf->stream_languages[asf->streams[i].stream_language_index];
822 if (rfc1766 && strlen(rfc1766) > 1) {
823 const char primary_tag[3] = { rfc1766[0], rfc1766[1], '\0' }; // ignore country code if any
824 const char *iso6392 = av_convert_lang_to(primary_tag,
825 AV_LANG_ISO639_2_BIBL);
827 av_dict_set(&st->metadata, "language", iso6392, 0);
833 ff_metadata_conv(&s->metadata, NULL, ff_asf_metadata_conv);
838 #define DO_2BITS(bits, var, defval) \
839 switch (bits & 3) { \
841 var = avio_rl32(pb); \
845 var = avio_rl16(pb); \
858 * Load a single ASF packet into the demuxer.
859 * @param s demux context
860 * @param pb context to read data from
861 * @return 0 on success, <0 on error
863 static int ff_asf_get_packet(AVFormatContext *s, AVIOContext *pb)
865 ASFContext *asf = s->priv_data;
866 uint32_t packet_length, padsize;
870 // if we do not know packet size, allow skipping up to 32 kB
872 if (asf->no_resync_search)
874 else if (s->packet_size > 0)
875 off = (avio_tell(pb) - s->data_offset) % s->packet_size + 3;
882 if (c == 0x82 && !d && !e)
887 /* This code allows handling of -EAGAIN at packet boundaries (i.e.
888 * if the packet sync code above triggers -EAGAIN). This does not
889 * imply complete -EAGAIN handling support at random positions in
891 if (pb->error == AVERROR(EAGAIN))
892 return AVERROR(EAGAIN);
894 av_log(s, AV_LOG_ERROR,
895 "ff asf bad header %x at:%"PRId64"\n", c, avio_tell(pb));
897 if ((c & 0x8f) == 0x82) {
900 av_log(s, AV_LOG_ERROR, "ff asf bad non zero\n");
901 return AVERROR_INVALIDDATA;
906 } else if(!url_feof(pb)) {
907 avio_seek(pb, -1, SEEK_CUR); // FIXME
910 asf->packet_flags = c;
911 asf->packet_property = d;
913 DO_2BITS(asf->packet_flags >> 5, packet_length, s->packet_size);
914 DO_2BITS(asf->packet_flags >> 1, padsize, 0); // sequence ignored
915 DO_2BITS(asf->packet_flags >> 3, padsize, 0); // padding length
917 // the following checks prevent overflows and infinite loops
918 if (!packet_length || packet_length >= (1U << 29)) {
919 av_log(s, AV_LOG_ERROR,
920 "invalid packet_length %d at:%"PRId64"\n",
921 packet_length, avio_tell(pb));
922 return AVERROR_INVALIDDATA;
924 if (padsize >= packet_length) {
925 av_log(s, AV_LOG_ERROR,
926 "invalid padsize %d at:%"PRId64"\n", padsize, avio_tell(pb));
927 return AVERROR_INVALIDDATA;
930 asf->packet_timestamp = avio_rl32(pb);
931 avio_rl16(pb); /* duration */
932 // rsize has at least 11 bytes which have to be present
934 if (asf->packet_flags & 0x01) {
935 asf->packet_segsizetype = avio_r8(pb);
937 asf->packet_segments = asf->packet_segsizetype & 0x3f;
939 asf->packet_segments = 1;
940 asf->packet_segsizetype = 0x80;
942 if (rsize > packet_length - padsize) {
943 asf->packet_size_left = 0;
944 av_log(s, AV_LOG_ERROR,
945 "invalid packet header length %d for pktlen %d-%d at %"PRId64"\n",
946 rsize, packet_length, padsize, avio_tell(pb));
947 return AVERROR_INVALIDDATA;
949 asf->packet_size_left = packet_length - padsize - rsize;
950 if (packet_length < asf->hdr.min_pktsize)
951 padsize += asf->hdr.min_pktsize - packet_length;
952 asf->packet_padsize = padsize;
953 av_dlog(s, "packet: size=%d padsize=%d left=%d\n",
954 s->packet_size, asf->packet_padsize, asf->packet_size_left);
960 * @return <0 if error
962 static int asf_read_frame_header(AVFormatContext *s, AVIOContext *pb)
964 ASFContext *asf = s->priv_data;
967 int num = avio_r8(pb);
969 int64_t ts0, ts1 av_unused;
971 asf->packet_segments--;
972 asf->packet_key_frame = num >> 7;
973 asf->stream_index = asf->asfid2avid[num & 0x7f];
974 asfst = &asf->streams[num & 0x7f];
975 // sequence should be ignored!
976 DO_2BITS(asf->packet_property >> 4, asf->packet_seq, 0);
977 DO_2BITS(asf->packet_property >> 2, asf->packet_frag_offset, 0);
978 DO_2BITS(asf->packet_property, asf->packet_replic_size, 0);
979 av_dlog(asf, "key:%d stream:%d seq:%d offset:%d replic_size:%d\n",
980 asf->packet_key_frame, asf->stream_index, asf->packet_seq,
981 asf->packet_frag_offset, asf->packet_replic_size);
982 if (rsize+(int64_t)asf->packet_replic_size > asf->packet_size_left) {
983 av_log(s, AV_LOG_ERROR, "packet_replic_size %d is invalid\n", asf->packet_replic_size);
984 return AVERROR_INVALIDDATA;
986 if (asf->packet_replic_size >= 8) {
987 int64_t end = avio_tell(pb) + asf->packet_replic_size;
989 asf->packet_obj_size = avio_rl32(pb);
990 if (asf->packet_obj_size >= (1 << 24) || asf->packet_obj_size <= 0) {
991 av_log(s, AV_LOG_ERROR, "packet_obj_size invalid\n");
992 return AVERROR_INVALIDDATA;
994 asf->packet_frag_timestamp = avio_rl32(pb); // timestamp
996 for (i = 0; i < asfst->payload_ext_ct; i++) {
997 ASFPayload *p = &asfst->payload[i];
1001 size = avio_rl16(pb);
1002 payend = avio_tell(pb) + size;
1004 av_log(s, AV_LOG_ERROR, "too long payload\n");
1009 // duration = avio_rl16(pb);
1012 aspect.num = avio_r8(pb);
1013 aspect.den = avio_r8(pb);
1014 if (aspect.num > 0 && aspect.den > 0 && asf->stream_index >= 0) {
1015 s->streams[asf->stream_index]->sample_aspect_ratio = aspect;
1020 ts0 = avio_rl64(pb);
1021 ts1 = avio_rl64(pb);
1022 if (ts0!= -1) asf->packet_frag_timestamp = ts0/10000;
1023 else asf->packet_frag_timestamp = AV_NOPTS_VALUE;
1033 avio_seek(pb, payend, SEEK_SET);
1036 avio_seek(pb, end, SEEK_SET);
1037 rsize += asf->packet_replic_size; // FIXME - check validity
1038 } else if (asf->packet_replic_size == 1) {
1039 // multipacket - frag_offset is beginning timestamp
1040 asf->packet_time_start = asf->packet_frag_offset;
1041 asf->packet_frag_offset = 0;
1042 asf->packet_frag_timestamp = asf->packet_timestamp;
1044 asf->packet_time_delta = avio_r8(pb);
1046 } else if (asf->packet_replic_size != 0) {
1047 av_log(s, AV_LOG_ERROR, "unexpected packet_replic_size of %d\n",
1048 asf->packet_replic_size);
1049 return AVERROR_INVALIDDATA;
1051 if (asf->packet_flags & 0x01) {
1052 DO_2BITS(asf->packet_segsizetype >> 6, asf->packet_frag_size, 0); // 0 is illegal
1053 if (rsize > asf->packet_size_left) {
1054 av_log(s, AV_LOG_ERROR, "packet_replic_size is invalid\n");
1055 return AVERROR_INVALIDDATA;
1056 } else if (asf->packet_frag_size > asf->packet_size_left - rsize) {
1057 if (asf->packet_frag_size > asf->packet_size_left - rsize + asf->packet_padsize) {
1058 av_log(s, AV_LOG_ERROR, "packet_frag_size is invalid (%d-%d)\n",
1059 asf->packet_size_left, rsize);
1060 return AVERROR_INVALIDDATA;
1062 int diff = asf->packet_frag_size - (asf->packet_size_left - rsize);
1063 asf->packet_size_left += diff;
1064 asf->packet_padsize -= diff;
1068 asf->packet_frag_size = asf->packet_size_left - rsize;
1070 if (asf->packet_replic_size == 1) {
1071 asf->packet_multi_size = asf->packet_frag_size;
1072 if (asf->packet_multi_size > asf->packet_size_left)
1073 return AVERROR_INVALIDDATA;
1075 asf->packet_size_left -= rsize;
1081 * Parse data from individual ASF packets (which were previously loaded
1082 * with asf_get_packet()).
1083 * @param s demux context
1084 * @param pb context to read data from
1085 * @param pkt pointer to store packet data into
1086 * @return 0 if data was stored in pkt, <0 on error or 1 if more ASF
1087 * packets need to be loaded (through asf_get_packet())
1089 static int ff_asf_parse_packet(AVFormatContext *s, AVIOContext *pb, AVPacket *pkt)
1091 ASFContext *asf = s->priv_data;
1092 ASFStream *asf_st = 0;
1098 if (asf->packet_size_left < FRAME_HEADER_SIZE ||
1099 asf->packet_segments < 1) {
1100 int ret = asf->packet_size_left + asf->packet_padsize;
1106 asf->packet_pos = avio_tell(pb);
1107 if (asf->data_object_size != (uint64_t)-1 &&
1108 (asf->packet_pos - asf->data_object_offset >= asf->data_object_size))
1109 return AVERROR_EOF; /* Do not exceed the size of the data object */
1112 if (asf->packet_time_start == 0) {
1113 if (asf_read_frame_header(s, pb) < 0) {
1114 asf->packet_segments = 0;
1117 if (asf->stream_index < 0 ||
1118 s->streams[asf->stream_index]->discard >= AVDISCARD_ALL ||
1119 (!asf->packet_key_frame &&
1120 s->streams[asf->stream_index]->discard >= AVDISCARD_NONKEY)) {
1121 asf->packet_time_start = 0;
1122 /* unhandled packet (should not happen) */
1123 avio_skip(pb, asf->packet_frag_size);
1124 asf->packet_size_left -= asf->packet_frag_size;
1125 if (asf->stream_index < 0)
1126 av_log(s, AV_LOG_ERROR, "ff asf skip %d (unknown stream)\n",
1127 asf->packet_frag_size);
1130 asf->asf_st = s->streams[asf->stream_index]->priv_data;
1132 asf_st = asf->asf_st;
1134 if (asf->packet_replic_size == 1) {
1135 // frag_offset is here used as the beginning timestamp
1136 asf->packet_frag_timestamp = asf->packet_time_start;
1137 asf->packet_time_start += asf->packet_time_delta;
1138 asf->packet_obj_size = asf->packet_frag_size = avio_r8(pb);
1139 asf->packet_size_left--;
1140 asf->packet_multi_size--;
1141 if (asf->packet_multi_size < asf->packet_obj_size) {
1142 asf->packet_time_start = 0;
1143 avio_skip(pb, asf->packet_multi_size);
1144 asf->packet_size_left -= asf->packet_multi_size;
1147 asf->packet_multi_size -= asf->packet_obj_size;
1149 if (asf_st->frag_offset + asf->packet_frag_size <= asf_st->pkt.size &&
1150 asf_st->frag_offset + asf->packet_frag_size > asf->packet_obj_size) {
1151 av_log(s, AV_LOG_INFO, "ignoring invalid packet_obj_size (%d %d %d %d)\n",
1152 asf_st->frag_offset, asf->packet_frag_size,
1153 asf->packet_obj_size, asf_st->pkt.size);
1154 asf->packet_obj_size = asf_st->pkt.size;
1157 if (asf_st->pkt.size != asf->packet_obj_size ||
1158 // FIXME is this condition sufficient?
1159 asf_st->frag_offset + asf->packet_frag_size > asf_st->pkt.size) {
1160 if (asf_st->pkt.data) {
1161 av_log(s, AV_LOG_INFO,
1162 "freeing incomplete packet size %d, new %d\n",
1163 asf_st->pkt.size, asf->packet_obj_size);
1164 asf_st->frag_offset = 0;
1165 av_free_packet(&asf_st->pkt);
1168 av_new_packet(&asf_st->pkt, asf->packet_obj_size);
1169 asf_st->seq = asf->packet_seq;
1170 asf_st->pkt.dts = asf->packet_frag_timestamp - asf->hdr.preroll;
1171 asf_st->pkt.stream_index = asf->stream_index;
1172 asf_st->pkt.pos = asf_st->packet_pos = asf->packet_pos;
1174 if (asf_st->pkt.data && asf_st->palette_changed) {
1176 pal = av_packet_new_side_data(&asf_st->pkt, AV_PKT_DATA_PALETTE,
1179 av_log(s, AV_LOG_ERROR, "Cannot append palette to packet\n");
1181 memcpy(pal, asf_st->palette, AVPALETTE_SIZE);
1182 asf_st->palette_changed = 0;
1185 av_dlog(asf, "new packet: stream:%d key:%d packet_key:%d audio:%d size:%d\n",
1186 asf->stream_index, asf->packet_key_frame,
1187 asf_st->pkt.flags & AV_PKT_FLAG_KEY,
1188 s->streams[asf->stream_index]->codec->codec_type == AVMEDIA_TYPE_AUDIO,
1189 asf->packet_obj_size);
1190 if (s->streams[asf->stream_index]->codec->codec_type == AVMEDIA_TYPE_AUDIO)
1191 asf->packet_key_frame = 1;
1192 if (asf->packet_key_frame)
1193 asf_st->pkt.flags |= AV_PKT_FLAG_KEY;
1197 av_dlog(asf, "READ PACKET s:%d os:%d o:%d,%d l:%d DATA:%p\n",
1198 s->packet_size, asf_st->pkt.size, asf->packet_frag_offset,
1199 asf_st->frag_offset, asf->packet_frag_size, asf_st->pkt.data);
1200 asf->packet_size_left -= asf->packet_frag_size;
1201 if (asf->packet_size_left < 0)
1204 if (asf->packet_frag_offset >= asf_st->pkt.size ||
1205 asf->packet_frag_size > asf_st->pkt.size - asf->packet_frag_offset) {
1206 av_log(s, AV_LOG_ERROR,
1207 "packet fragment position invalid %u,%u not in %u\n",
1208 asf->packet_frag_offset, asf->packet_frag_size,
1213 ret = avio_read(pb, asf_st->pkt.data + asf->packet_frag_offset,
1214 asf->packet_frag_size);
1215 if (ret != asf->packet_frag_size) {
1216 if (ret < 0 || asf->packet_frag_offset + ret == 0)
1217 return ret < 0 ? ret : AVERROR_EOF;
1219 if (asf_st->ds_span > 1) {
1220 // scrambling, we can either drop it completely or fill the remainder
1221 // TODO: should we fill the whole packet instead of just the current
1223 memset(asf_st->pkt.data + asf->packet_frag_offset + ret, 0,
1224 asf->packet_frag_size - ret);
1225 ret = asf->packet_frag_size;
1227 // no scrambling, so we can return partial packets
1228 av_shrink_packet(&asf_st->pkt, asf->packet_frag_offset + ret);
1231 if (s->key && s->keylen == 20)
1232 ff_asfcrypt_dec(s->key, asf_st->pkt.data + asf->packet_frag_offset,
1234 asf_st->frag_offset += ret;
1235 /* test if whole packet is read */
1236 if (asf_st->frag_offset == asf_st->pkt.size) {
1237 // workaround for macroshit radio DVR-MS files
1238 if (s->streams[asf->stream_index]->codec->codec_id == AV_CODEC_ID_MPEG2VIDEO &&
1239 asf_st->pkt.size > 100) {
1241 for (i = 0; i < asf_st->pkt.size && !asf_st->pkt.data[i]; i++)
1243 if (i == asf_st->pkt.size) {
1244 av_log(s, AV_LOG_DEBUG, "discarding ms fart\n");
1245 asf_st->frag_offset = 0;
1246 av_free_packet(&asf_st->pkt);
1252 if (asf_st->ds_span > 1) {
1253 if (asf_st->pkt.size != asf_st->ds_packet_size * asf_st->ds_span) {
1254 av_log(s, AV_LOG_ERROR,
1255 "pkt.size != ds_packet_size * ds_span (%d %d %d)\n",
1256 asf_st->pkt.size, asf_st->ds_packet_size,
1259 /* packet descrambling */
1260 uint8_t *newdata = av_malloc(asf_st->pkt.size +
1261 FF_INPUT_BUFFER_PADDING_SIZE);
1264 memset(newdata + asf_st->pkt.size, 0,
1265 FF_INPUT_BUFFER_PADDING_SIZE);
1266 while (offset < asf_st->pkt.size) {
1267 int off = offset / asf_st->ds_chunk_size;
1268 int row = off / asf_st->ds_span;
1269 int col = off % asf_st->ds_span;
1270 int idx = row + col * asf_st->ds_packet_size / asf_st->ds_chunk_size;
1271 assert(offset + asf_st->ds_chunk_size <= asf_st->pkt.size);
1272 assert(idx + 1 <= asf_st->pkt.size / asf_st->ds_chunk_size);
1273 memcpy(newdata + offset,
1274 asf_st->pkt.data + idx * asf_st->ds_chunk_size,
1275 asf_st->ds_chunk_size);
1276 offset += asf_st->ds_chunk_size;
1278 av_free(asf_st->pkt.data);
1279 asf_st->pkt.data = newdata;
1283 asf_st->frag_offset = 0;
1285 asf_st->pkt.size = 0;
1286 asf_st->pkt.data = 0;
1287 asf_st->pkt.side_data_elems = 0;
1288 asf_st->pkt.side_data = NULL;
1289 break; // packet completed
1295 static int asf_read_packet(AVFormatContext *s, AVPacket *pkt)
1297 ASFContext *asf = s->priv_data;
1302 /* parse cached packets, if any */
1303 if ((ret = ff_asf_parse_packet(s, s->pb, pkt)) <= 0)
1305 if ((ret = ff_asf_get_packet(s, s->pb)) < 0)
1306 assert(asf->packet_size_left < FRAME_HEADER_SIZE ||
1307 asf->packet_segments < 1);
1308 asf->packet_time_start = 0;
1312 // Added to support seeking after packets have been read
1313 // If information is not reset, read_packet fails due to
1314 // leftover information from previous reads
1315 static void asf_reset_header(AVFormatContext *s)
1317 ASFContext *asf = s->priv_data;
1321 asf->packet_size_left = 0;
1322 asf->packet_segments = 0;
1323 asf->packet_flags = 0;
1324 asf->packet_property = 0;
1325 asf->packet_timestamp = 0;
1326 asf->packet_segsizetype = 0;
1327 asf->packet_segments = 0;
1328 asf->packet_seq = 0;
1329 asf->packet_replic_size = 0;
1330 asf->packet_key_frame = 0;
1331 asf->packet_padsize = 0;
1332 asf->packet_frag_offset = 0;
1333 asf->packet_frag_size = 0;
1334 asf->packet_frag_timestamp = 0;
1335 asf->packet_multi_size = 0;
1336 asf->packet_obj_size = 0;
1337 asf->packet_time_delta = 0;
1338 asf->packet_time_start = 0;
1340 for (i = 0; i < s->nb_streams; i++) {
1341 asf_st = s->streams[i]->priv_data;
1342 av_free_packet(&asf_st->pkt);
1343 asf_st->frag_offset = 0;
1349 static int asf_read_close(AVFormatContext *s)
1351 asf_reset_header(s);
1356 static int64_t asf_read_pts(AVFormatContext *s, int stream_index,
1357 int64_t *ppos, int64_t pos_limit)
1359 AVPacket pkt1, *pkt = &pkt1;
1362 int64_t pos = *ppos;
1364 int64_t start_pos[ASF_MAX_STREAMS];
1366 for (i = 0; i < s->nb_streams; i++)
1369 if (s->packet_size > 0)
1370 pos = (pos + s->packet_size - 1 - s->data_offset) /
1371 s->packet_size * s->packet_size +
1374 if (avio_seek(s->pb, pos, SEEK_SET) < 0)
1375 return AV_NOPTS_VALUE;
1377 asf_reset_header(s);
1379 if (av_read_frame(s, pkt) < 0) {
1380 av_log(s, AV_LOG_INFO, "asf_read_pts failed\n");
1381 return AV_NOPTS_VALUE;
1386 av_free_packet(pkt);
1387 if (pkt->flags & AV_PKT_FLAG_KEY) {
1388 i = pkt->stream_index;
1390 asf_st = s->streams[i]->priv_data;
1392 // assert((asf_st->packet_pos - s->data_offset) % s->packet_size == 0);
1393 pos = asf_st->packet_pos;
1395 av_add_index_entry(s->streams[i], pos, pts, pkt->size,
1396 pos - start_pos[i] + 1, AVINDEX_KEYFRAME);
1397 start_pos[i] = asf_st->packet_pos + 1;
1399 if (pkt->stream_index == stream_index)
1408 static void asf_build_simple_index(AVFormatContext *s, int stream_index)
1411 ASFContext *asf = s->priv_data;
1412 int64_t current_pos = avio_tell(s->pb);
1414 if(avio_seek(s->pb, asf->data_object_offset + asf->data_object_size, SEEK_SET) < 0) {
1415 asf->index_read= -1;
1419 ff_get_guid(s->pb, &g);
1421 /* the data object can be followed by other top-level objects,
1422 * skip them until the simple index object is reached */
1423 while (ff_guidcmp(&g, &ff_asf_simple_index_header)) {
1424 int64_t gsize = avio_rl64(s->pb);
1425 if (gsize < 24 || url_feof(s->pb)) {
1426 avio_seek(s->pb, current_pos, SEEK_SET);
1427 asf->index_read= -1;
1430 avio_skip(s->pb, gsize - 24);
1431 ff_get_guid(s->pb, &g);
1435 int64_t itime, last_pos = -1;
1438 int64_t av_unused gsize = avio_rl64(s->pb);
1439 ff_get_guid(s->pb, &g);
1440 itime = avio_rl64(s->pb);
1441 pct = avio_rl32(s->pb);
1442 ict = avio_rl32(s->pb);
1443 av_log(s, AV_LOG_DEBUG,
1444 "itime:0x%"PRIx64", pct:%d, ict:%d\n", itime, pct, ict);
1446 for (i = 0; i < ict; i++) {
1447 int pktnum = avio_rl32(s->pb);
1448 int pktct = avio_rl16(s->pb);
1449 int64_t pos = s->data_offset + s->packet_size * (int64_t)pktnum;
1450 int64_t index_pts = FFMAX(av_rescale(itime, i, 10000) - asf->hdr.preroll, 0);
1452 if (pos != last_pos) {
1453 av_log(s, AV_LOG_DEBUG, "pktnum:%d, pktct:%d pts: %"PRId64"\n",
1454 pktnum, pktct, index_pts);
1455 av_add_index_entry(s->streams[stream_index], pos, index_pts,
1456 s->packet_size, 0, AVINDEX_KEYFRAME);
1460 asf->index_read = ict > 1;
1462 avio_seek(s->pb, current_pos, SEEK_SET);
1465 static int asf_read_seek(AVFormatContext *s, int stream_index,
1466 int64_t pts, int flags)
1468 ASFContext *asf = s->priv_data;
1469 AVStream *st = s->streams[stream_index];
1471 if (s->packet_size <= 0)
1474 /* Try using the protocol's read_seek if available */
1476 int ret = avio_seek_time(s->pb, stream_index, pts, flags);
1478 asf_reset_header(s);
1479 if (ret != AVERROR(ENOSYS))
1483 if (!asf->index_read)
1484 asf_build_simple_index(s, stream_index);
1486 if ((asf->index_read > 0 && st->index_entries)) {
1487 int index = av_index_search_timestamp(st, pts, flags);
1489 /* find the position */
1490 uint64_t pos = st->index_entries[index].pos;
1493 av_log(s, AV_LOG_DEBUG, "SEEKTO: %"PRId64"\n", pos);
1494 if(avio_seek(s->pb, pos, SEEK_SET) < 0)
1496 asf_reset_header(s);
1500 /* no index or seeking by index failed */
1501 if (ff_seek_frame_binary(s, stream_index, pts, flags) < 0)
1503 asf_reset_header(s);
1507 AVInputFormat ff_asf_demuxer = {
1509 .long_name = NULL_IF_CONFIG_SMALL("ASF (Advanced / Active Streaming Format)"),
1510 .priv_data_size = sizeof(ASFContext),
1511 .read_probe = asf_probe,
1512 .read_header = asf_read_header,
1513 .read_packet = asf_read_packet,
1514 .read_close = asf_read_close,
1515 .read_seek = asf_read_seek,
1516 .read_timestamp = asf_read_pts,
1517 .flags = AVFMT_NOBINSEARCH | AVFMT_NOGENSEARCH,
1518 .priv_class = &asf_class,