2 * ASF compatible demuxer
3 * Copyright (c) 2000, 2001 Fabrice Bellard
5 * This file is part of Libav.
7 * Libav is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
12 * Libav is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with Libav; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
24 #include "libavutil/attributes.h"
25 #include "libavutil/avassert.h"
26 #include "libavutil/avstring.h"
27 #include "libavutil/bswap.h"
28 #include "libavutil/common.h"
29 #include "libavutil/dict.h"
30 #include "libavutil/internal.h"
31 #include "libavutil/mathematics.h"
32 #include "libavutil/opt.h"
34 #include "avio_internal.h"
35 #include "avlanguage.h"
42 typedef struct ASFContext {
44 int asfid2avid[128]; ///< conversion table from asf ID 2 AVStream ID
45 ASFStream streams[128]; ///< it's max number and it's not that big
46 uint32_t stream_bitrates[128]; ///< max number of streams, bitrate for each (for streaming)
48 char stream_languages[128][6]; ///< max number of streams, language for each (RFC1766, e.g. en-US)
49 /* non streamed additonnal info */
52 /* only for reading */
53 uint64_t data_offset; ///< beginning of the first data packet
54 uint64_t data_object_offset; ///< data object offset (excl. GUID & size)
55 uint64_t data_object_size; ///< size of the data object
63 int packet_segsizetype;
66 int packet_replic_size;
69 unsigned int packet_frag_offset;
70 unsigned int packet_frag_size;
71 int64_t packet_frag_timestamp;
72 int packet_multi_size;
74 int packet_time_delta;
75 int packet_time_start;
80 ASFStream *asf_st; ///< currently decoded stream
85 static const AVOption options[] = {
86 { "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 },
90 static const AVClass asf_class = {
91 .class_name = "asf demuxer",
92 .item_name = av_default_item_name,
94 .version = LIBAVUTIL_VERSION_INT,
100 #define ASF_MAX_STREAMS 127
101 #define FRAME_HEADER_SIZE 17
102 // Fix Me! FRAME_HEADER_SIZE may be different.
104 static const ff_asf_guid index_guid = {
105 0x90, 0x08, 0x00, 0x33, 0xb1, 0xe5, 0xcf, 0x11, 0x89, 0xf4, 0x00, 0xa0, 0xc9, 0x03, 0x49, 0xcb
109 static const ff_asf_guid stream_bitrate_guid = { /* (http://get.to/sdp) */
110 0xce, 0x75, 0xf8, 0x7b, 0x8d, 0x46, 0xd1, 0x11, 0x8d, 0x82, 0x00, 0x60, 0x97, 0xc9, 0xa2, 0xb2
113 #define PRINT_IF_GUID(g, cmp) \
114 if (!ff_guidcmp(g, &cmp)) \
115 av_dlog(NULL, "(GUID: %s) ", # cmp)
117 static void print_guid(ff_asf_guid *g)
120 PRINT_IF_GUID(g, ff_asf_header);
121 else PRINT_IF_GUID(g, ff_asf_file_header);
122 else PRINT_IF_GUID(g, ff_asf_stream_header);
123 else PRINT_IF_GUID(g, ff_asf_audio_stream);
124 else PRINT_IF_GUID(g, ff_asf_audio_conceal_none);
125 else PRINT_IF_GUID(g, ff_asf_video_stream);
126 else PRINT_IF_GUID(g, ff_asf_video_conceal_none);
127 else PRINT_IF_GUID(g, ff_asf_command_stream);
128 else PRINT_IF_GUID(g, ff_asf_comment_header);
129 else PRINT_IF_GUID(g, ff_asf_codec_comment_header);
130 else PRINT_IF_GUID(g, ff_asf_codec_comment1_header);
131 else PRINT_IF_GUID(g, ff_asf_data_header);
132 else PRINT_IF_GUID(g, index_guid);
133 else PRINT_IF_GUID(g, ff_asf_head1_guid);
134 else PRINT_IF_GUID(g, ff_asf_head2_guid);
135 else PRINT_IF_GUID(g, ff_asf_my_guid);
136 else PRINT_IF_GUID(g, ff_asf_ext_stream_header);
137 else PRINT_IF_GUID(g, ff_asf_extended_content_header);
138 else PRINT_IF_GUID(g, ff_asf_ext_stream_embed_stream_header);
139 else PRINT_IF_GUID(g, ff_asf_ext_stream_audio_stream);
140 else PRINT_IF_GUID(g, ff_asf_metadata_header);
141 else PRINT_IF_GUID(g, ff_asf_metadata_library_header);
142 else PRINT_IF_GUID(g, ff_asf_marker_header);
143 else PRINT_IF_GUID(g, stream_bitrate_guid);
144 else PRINT_IF_GUID(g, ff_asf_language_guid);
146 av_dlog(NULL, "(GUID: unknown) ");
147 for (i = 0; i < 16; i++)
148 av_dlog(NULL, " 0x%02x,", (*g)[i]);
149 av_dlog(NULL, "}\n");
153 #define print_guid(g)
156 static int asf_probe(AVProbeData *pd)
158 /* check file header */
159 if (!ff_guidcmp(pd->buf, &ff_asf_header))
160 return AVPROBE_SCORE_MAX;
165 /* size of type 2 (BOOL) is 32bit for "Extended Content Description Object"
166 * but 16 bit for "Metadata Object" and "Metadata Library Object" */
167 static int get_value(AVIOContext *pb, int type, int type2_size)
171 return (type2_size == 32) ? avio_rl32(pb) : avio_rl16(pb);
173 return avio_rl32(pb);
175 return avio_rl64(pb);
177 return avio_rl16(pb);
183 /* MSDN claims that this should be "compatible with the ID3 frame, APIC",
184 * but in reality this is only loosely similar */
185 static int asf_read_picture(AVFormatContext *s, int len)
187 AVPacket pkt = { 0 };
188 const CodecMime *mime = ff_id3v2_mime_tags;
189 enum AVCodecID id = AV_CODEC_ID_NONE;
191 uint8_t *desc = NULL;
193 int ret, type, picsize, desc_len;
195 /* type + picsize + mime + desc */
196 if (len < 1 + 4 + 2 + 2) {
197 av_log(s, AV_LOG_ERROR, "Invalid attached picture size: %d.\n", len);
198 return AVERROR_INVALIDDATA;
202 type = avio_r8(s->pb);
204 if (type >= FF_ARRAY_ELEMS(ff_id3v2_picture_types) || type < 0) {
205 av_log(s, AV_LOG_WARNING, "Unknown attached picture type: %d.\n", type);
209 /* picture data size */
210 picsize = avio_rl32(s->pb);
213 /* picture MIME type */
214 len -= avio_get_str16le(s->pb, len, mimetype, sizeof(mimetype));
215 while (mime->id != AV_CODEC_ID_NONE) {
216 if (!strncmp(mime->str, mimetype, sizeof(mimetype))) {
222 if (id == AV_CODEC_ID_NONE) {
223 av_log(s, AV_LOG_ERROR, "Unknown attached picture mimetype: %s.\n",
228 if (picsize >= len) {
229 av_log(s, AV_LOG_ERROR, "Invalid attached picture data size: %d >= %d.\n",
231 return AVERROR_INVALIDDATA;
234 /* picture description */
235 desc_len = (len - picsize) * 2 + 1;
236 desc = av_malloc(desc_len);
238 return AVERROR(ENOMEM);
239 len -= avio_get_str16le(s->pb, len - picsize, desc, desc_len);
241 ret = av_get_packet(s->pb, &pkt, picsize);
245 st = avformat_new_stream(s, NULL);
247 ret = AVERROR(ENOMEM);
250 st->disposition |= AV_DISPOSITION_ATTACHED_PIC;
251 st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
252 st->codec->codec_id = id;
253 st->attached_pic = pkt;
254 st->attached_pic.stream_index = st->index;
255 st->attached_pic.flags |= AV_PKT_FLAG_KEY;
258 av_dict_set(&st->metadata, "title", desc, AV_DICT_DONT_STRDUP_VAL);
262 av_dict_set(&st->metadata, "comment", ff_id3v2_picture_types[type], 0);
268 av_free_packet(&pkt);
272 static void get_id3_tag(AVFormatContext *s, int len)
274 ID3v2ExtraMeta *id3v2_extra_meta = NULL;
276 ff_id3v2_read(s, ID3v2_DEFAULT_MAGIC, &id3v2_extra_meta);
277 if (id3v2_extra_meta)
278 ff_id3v2_parse_apic(s, &id3v2_extra_meta);
279 ff_id3v2_free_extra_meta(&id3v2_extra_meta);
282 static void get_tag(AVFormatContext *s, const char *key, int type, int len, int type2_size)
285 int64_t off = avio_tell(s->pb);
287 if ((unsigned)len >= (UINT_MAX - 1) / 2)
290 value = av_malloc(2 * len + 1);
294 if (type == 0) { // UTF16-LE
295 avio_get_str16le(s->pb, len, value, 2 * len + 1);
296 } else if (type == 1) { // byte array
297 if (!strcmp(key, "WM/Picture")) { // handle cover art
298 asf_read_picture(s, len);
299 } else if (!strcmp(key, "ID3")) { // handle ID3 tag
302 av_log(s, AV_LOG_VERBOSE, "Unsupported byte array in tag %s.\n", key);
305 } else if (type > 1 && type <= 5) { // boolean or DWORD or QWORD or WORD
306 uint64_t num = get_value(s->pb, type, type2_size);
307 snprintf(value, len, "%"PRIu64, num);
308 } else if (type == 6) { // (don't) handle GUID
309 av_log(s, AV_LOG_DEBUG, "Unsupported GUID value in tag %s.\n", key);
312 av_log(s, AV_LOG_DEBUG,
313 "Unsupported value type %d in tag %s.\n", type, key);
317 av_dict_set(&s->metadata, key, value, 0);
321 avio_seek(s->pb, off + len, SEEK_SET);
324 static int asf_read_file_properties(AVFormatContext *s, int64_t size)
326 ASFContext *asf = s->priv_data;
327 AVIOContext *pb = s->pb;
329 ff_get_guid(pb, &asf->hdr.guid);
330 asf->hdr.file_size = avio_rl64(pb);
331 asf->hdr.create_time = avio_rl64(pb);
332 avio_rl64(pb); /* number of packets */
333 asf->hdr.play_time = avio_rl64(pb);
334 asf->hdr.send_time = avio_rl64(pb);
335 asf->hdr.preroll = avio_rl32(pb);
336 asf->hdr.ignore = avio_rl32(pb);
337 asf->hdr.flags = avio_rl32(pb);
338 asf->hdr.min_pktsize = avio_rl32(pb);
339 asf->hdr.max_pktsize = avio_rl32(pb);
340 if (asf->hdr.min_pktsize >= (1U << 29))
341 return AVERROR_INVALIDDATA;
342 asf->hdr.max_bitrate = avio_rl32(pb);
343 s->packet_size = asf->hdr.max_pktsize;
348 static int asf_read_stream_properties(AVFormatContext *s, int64_t size)
350 ASFContext *asf = s->priv_data;
351 AVIOContext *pb = s->pb;
355 enum AVMediaType type;
356 int type_specific_size, sizeX;
358 int64_t pos1, pos2, start_time;
359 int test_for_ext_stream_audio, is_dvr_ms_audio = 0;
361 if (s->nb_streams == ASF_MAX_STREAMS) {
362 av_log(s, AV_LOG_ERROR, "too many streams\n");
363 return AVERROR(EINVAL);
366 pos1 = avio_tell(pb);
368 st = avformat_new_stream(s, NULL);
370 return AVERROR(ENOMEM);
371 avpriv_set_pts_info(st, 32, 1, 1000); /* 32 bit pts in ms */
372 asf_st = av_mallocz(sizeof(ASFStream));
374 return AVERROR(ENOMEM);
375 st->priv_data = asf_st;
377 start_time = asf->hdr.preroll;
379 asf_st->stream_language_index = 128; // invalid stream index means no language info
381 if (!(asf->hdr.flags & 0x01)) { // if we aren't streaming...
382 st->duration = asf->hdr.play_time /
383 (10000000 / 1000) - start_time;
387 test_for_ext_stream_audio = 0;
388 if (!ff_guidcmp(&g, &ff_asf_audio_stream)) {
389 type = AVMEDIA_TYPE_AUDIO;
390 } else if (!ff_guidcmp(&g, &ff_asf_video_stream)) {
391 type = AVMEDIA_TYPE_VIDEO;
392 } else if (!ff_guidcmp(&g, &ff_asf_jfif_media)) {
393 type = AVMEDIA_TYPE_VIDEO;
394 st->codec->codec_id = AV_CODEC_ID_MJPEG;
395 } else if (!ff_guidcmp(&g, &ff_asf_command_stream)) {
396 type = AVMEDIA_TYPE_DATA;
397 } else if (!ff_guidcmp(&g, &ff_asf_ext_stream_embed_stream_header)) {
398 test_for_ext_stream_audio = 1;
399 type = AVMEDIA_TYPE_UNKNOWN;
404 avio_skip(pb, 8); /* total_size */
405 type_specific_size = avio_rl32(pb);
407 st->id = avio_rl16(pb) & 0x7f; /* stream id */
408 // mapping of asf ID to AV stream ID;
409 asf->asfid2avid[st->id] = s->nb_streams - 1;
413 if (test_for_ext_stream_audio) {
415 if (!ff_guidcmp(&g, &ff_asf_ext_stream_audio_stream)) {
416 type = AVMEDIA_TYPE_AUDIO;
427 st->codec->codec_type = type;
428 if (type == AVMEDIA_TYPE_AUDIO) {
429 int ret = ff_get_wav_header(pb, st->codec, type_specific_size);
432 if (is_dvr_ms_audio) {
433 // codec_id and codec_tag are unreliable in dvr_ms
434 // files. Set them later by probing stream.
435 st->codec->codec_id = AV_CODEC_ID_PROBE;
436 st->codec->codec_tag = 0;
438 if (st->codec->codec_id == AV_CODEC_ID_AAC)
439 st->need_parsing = AVSTREAM_PARSE_NONE;
441 st->need_parsing = AVSTREAM_PARSE_FULL;
442 /* We have to init the frame size at some point .... */
443 pos2 = avio_tell(pb);
444 if (size >= (pos2 + 8 - pos1 + 24)) {
445 asf_st->ds_span = avio_r8(pb);
446 asf_st->ds_packet_size = avio_rl16(pb);
447 asf_st->ds_chunk_size = avio_rl16(pb);
448 avio_rl16(pb); // ds_data_size
449 avio_r8(pb); // ds_silence_data
451 if (asf_st->ds_span > 1) {
452 if (!asf_st->ds_chunk_size ||
453 (asf_st->ds_packet_size / asf_st->ds_chunk_size <= 1) ||
454 asf_st->ds_packet_size % asf_st->ds_chunk_size)
455 asf_st->ds_span = 0; // disable descrambling
457 } else if (type == AVMEDIA_TYPE_VIDEO &&
458 size - (avio_tell(pb) - pos1 + 24) >= 51) {
462 avio_rl16(pb); /* size */
463 sizeX = avio_rl32(pb); /* size */
464 st->codec->width = avio_rl32(pb);
465 st->codec->height = avio_rl32(pb);
466 /* not available for asf */
467 avio_rl16(pb); /* panes */
468 st->codec->bits_per_coded_sample = avio_rl16(pb); /* depth */
469 tag1 = avio_rl32(pb);
472 st->codec->extradata_size = sizeX - 40;
473 st->codec->extradata = av_mallocz(st->codec->extradata_size +
474 FF_INPUT_BUFFER_PADDING_SIZE);
475 avio_read(pb, st->codec->extradata, st->codec->extradata_size);
478 /* Extract palette from extradata if bpp <= 8 */
479 /* This code assumes that extradata contains only palette */
480 /* This is true for all paletted codecs implemented in libavcodec */
481 if (st->codec->extradata_size && (st->codec->bits_per_coded_sample <= 8)) {
484 for (i = 0; i < FFMIN(st->codec->extradata_size, AVPALETTE_SIZE) / 4; i++)
485 asf_st->palette[i] = av_bswap32(((uint32_t *)st->codec->extradata)[i]);
487 memcpy(asf_st->palette, st->codec->extradata,
488 FFMIN(st->codec->extradata_size, AVPALETTE_SIZE));
490 asf_st->palette_changed = 1;
493 st->codec->codec_tag = tag1;
494 st->codec->codec_id = ff_codec_get_id(ff_codec_bmp_tags, tag1);
495 if (tag1 == MKTAG('D', 'V', 'R', ' ')) {
496 st->need_parsing = AVSTREAM_PARSE_FULL;
497 /* issue658 contains wrong w/h and MS even puts a fake seq header
498 * with wrong w/h in extradata while a correct one is in the stream.
499 * maximum lameness */
501 st->codec->height = 0;
502 av_freep(&st->codec->extradata);
503 st->codec->extradata_size = 0;
505 if (st->codec->codec_id == AV_CODEC_ID_H264)
506 st->need_parsing = AVSTREAM_PARSE_FULL_ONCE;
508 pos2 = avio_tell(pb);
509 avio_skip(pb, size - (pos2 - pos1 + 24));
514 static int asf_read_ext_stream_properties(AVFormatContext *s, int64_t size)
516 ASFContext *asf = s->priv_data;
517 AVIOContext *pb = s->pb;
519 int ext_len, payload_ext_ct, stream_ct, i;
520 uint32_t leak_rate, stream_num;
521 unsigned int stream_languageid_index;
523 avio_rl64(pb); // starttime
524 avio_rl64(pb); // endtime
525 leak_rate = avio_rl32(pb); // leak-datarate
526 avio_rl32(pb); // bucket-datasize
527 avio_rl32(pb); // init-bucket-fullness
528 avio_rl32(pb); // alt-leak-datarate
529 avio_rl32(pb); // alt-bucket-datasize
530 avio_rl32(pb); // alt-init-bucket-fullness
531 avio_rl32(pb); // max-object-size
532 avio_rl32(pb); // flags (reliable,seekable,no_cleanpoints?,resend-live-cleanpoints, rest of bits reserved)
533 stream_num = avio_rl16(pb); // stream-num
535 stream_languageid_index = avio_rl16(pb); // stream-language-id-index
536 if (stream_num < 128)
537 asf->streams[stream_num].stream_language_index = stream_languageid_index;
539 avio_rl64(pb); // avg frametime in 100ns units
540 stream_ct = avio_rl16(pb); // stream-name-count
541 payload_ext_ct = avio_rl16(pb); // payload-extension-system-count
543 if (stream_num < 128)
544 asf->stream_bitrates[stream_num] = leak_rate;
546 for (i = 0; i < stream_ct; i++) {
548 ext_len = avio_rl16(pb);
549 avio_skip(pb, ext_len);
552 for (i = 0; i < payload_ext_ct; i++) {
555 ext_len = avio_rl32(pb);
556 avio_skip(pb, ext_len);
562 static int asf_read_content_desc(AVFormatContext *s, int64_t size)
564 AVIOContext *pb = s->pb;
565 int len1, len2, len3, len4, len5;
567 len1 = avio_rl16(pb);
568 len2 = avio_rl16(pb);
569 len3 = avio_rl16(pb);
570 len4 = avio_rl16(pb);
571 len5 = avio_rl16(pb);
572 get_tag(s, "title", 0, len1, 32);
573 get_tag(s, "author", 0, len2, 32);
574 get_tag(s, "copyright", 0, len3, 32);
575 get_tag(s, "comment", 0, len4, 32);
581 static int asf_read_ext_content_desc(AVFormatContext *s, int64_t size)
583 AVIOContext *pb = s->pb;
584 ASFContext *asf = s->priv_data;
585 int desc_count, i, ret;
587 desc_count = avio_rl16(pb);
588 for (i = 0; i < desc_count; i++) {
589 int name_len, value_type, value_len;
592 name_len = avio_rl16(pb);
593 if (name_len % 2) // must be even, broken lavf versions wrote len-1
595 if ((ret = avio_get_str16le(pb, name_len, name, sizeof(name))) < name_len)
596 avio_skip(pb, name_len - ret);
597 value_type = avio_rl16(pb);
598 value_len = avio_rl16(pb);
599 if (!value_type && value_len % 2)
601 /* My sample has that stream set to 0 maybe that mean the container.
602 * ASF stream count starts at 1. I am using 0 to the container value
603 * since it's unused. */
604 if (!strcmp(name, "AspectRatioX"))
605 asf->dar[0].num = get_value(s->pb, value_type, 32);
606 else if (!strcmp(name, "AspectRatioY"))
607 asf->dar[0].den = get_value(s->pb, value_type, 32);
609 get_tag(s, name, value_type, value_len, 32);
615 static int asf_read_language_list(AVFormatContext *s, int64_t size)
617 AVIOContext *pb = s->pb;
618 ASFContext *asf = s->priv_data;
620 int stream_count = avio_rl16(pb);
621 for (j = 0; j < stream_count; j++) {
623 unsigned int lang_len = avio_r8(pb);
624 if ((ret = avio_get_str16le(pb, lang_len, lang,
625 sizeof(lang))) < lang_len)
626 avio_skip(pb, lang_len - ret);
628 av_strlcpy(asf->stream_languages[j], lang,
629 sizeof(*asf->stream_languages));
635 static int asf_read_metadata(AVFormatContext *s, int64_t size)
637 AVIOContext *pb = s->pb;
638 ASFContext *asf = s->priv_data;
639 int n, stream_num, name_len, value_len;
643 for (i = 0; i < n; i++) {
647 avio_rl16(pb); // lang_list_index
648 stream_num = avio_rl16(pb);
649 name_len = avio_rl16(pb);
650 value_type = avio_rl16(pb); /* value_type */
651 value_len = avio_rl32(pb);
653 if ((ret = avio_get_str16le(pb, name_len, name, sizeof(name))) < name_len)
654 avio_skip(pb, name_len - ret);
655 av_dlog(s, "%d stream %d name_len %2d type %d len %4d <%s>\n",
656 i, stream_num, name_len, value_type, value_len, name);
658 if (!strcmp(name, "AspectRatioX")){
659 int aspect_x = get_value(s->pb, value_type, 16);
661 asf->dar[stream_num].num = aspect_x;
662 } else if(!strcmp(name, "AspectRatioY")){
663 int aspect_y = get_value(s->pb, value_type, 16);
665 asf->dar[stream_num].den = aspect_y;
667 get_tag(s, name, value_type, value_len, 16);
674 static int asf_read_marker(AVFormatContext *s, int64_t size)
676 AVIOContext *pb = s->pb;
677 ASFContext *asf = s->priv_data;
678 int i, count, name_len, ret;
681 avio_rl64(pb); // reserved 16 bytes
682 avio_rl64(pb); // ...
683 count = avio_rl32(pb); // markers count
684 avio_rl16(pb); // reserved 2 bytes
685 name_len = avio_rl16(pb); // name length
686 for (i = 0; i < name_len; i++)
687 avio_r8(pb); // skip the name
689 for (i = 0; i < count; i++) {
693 avio_rl64(pb); // offset, 8 bytes
694 pres_time = avio_rl64(pb); // presentation time
695 pres_time -= asf->hdr.preroll * 10000;
696 avio_rl16(pb); // entry length
697 avio_rl32(pb); // send time
698 avio_rl32(pb); // flags
699 name_len = avio_rl32(pb); // name length
700 if ((ret = avio_get_str16le(pb, name_len * 2, name,
701 sizeof(name))) < name_len)
702 avio_skip(pb, name_len - ret);
703 avpriv_new_chapter(s, i, (AVRational) { 1, 10000000 }, pres_time,
704 AV_NOPTS_VALUE, name);
710 static int asf_read_header(AVFormatContext *s)
712 ASFContext *asf = s->priv_data;
714 AVIOContext *pb = s->pb;
719 if (ff_guidcmp(&g, &ff_asf_header))
725 memset(&asf->asfid2avid, -1, sizeof(asf->asfid2avid));
727 uint64_t gpos = avio_tell(pb);
729 gsize = avio_rl64(pb);
731 if (!ff_guidcmp(&g, &ff_asf_data_header)) {
732 asf->data_object_offset = avio_tell(pb);
733 /* If not streaming, gsize is not unlimited (how?),
734 * and there is enough space in the file.. */
735 if (!(asf->hdr.flags & 0x01) && gsize >= 100)
736 asf->data_object_size = gsize - 24;
738 asf->data_object_size = (uint64_t)-1;
743 if (!ff_guidcmp(&g, &ff_asf_file_header)) {
744 int ret = asf_read_file_properties(s, gsize);
747 } else if (!ff_guidcmp(&g, &ff_asf_stream_header)) {
748 int ret = asf_read_stream_properties(s, gsize);
751 } else if (!ff_guidcmp(&g, &ff_asf_comment_header)) {
752 asf_read_content_desc(s, gsize);
753 } else if (!ff_guidcmp(&g, &ff_asf_language_guid)) {
754 asf_read_language_list(s, gsize);
755 } else if (!ff_guidcmp(&g, &ff_asf_extended_content_header)) {
756 asf_read_ext_content_desc(s, gsize);
757 } else if (!ff_guidcmp(&g, &ff_asf_metadata_header)) {
758 asf_read_metadata(s, gsize);
759 } else if (!ff_guidcmp(&g, &ff_asf_metadata_library_header)) {
760 asf_read_metadata(s, gsize);
761 } else if (!ff_guidcmp(&g, &ff_asf_ext_stream_header)) {
762 asf_read_ext_stream_properties(s, gsize);
764 // there could be a optional stream properties object to follow
765 // if so the next iteration will pick it up
767 } else if (!ff_guidcmp(&g, &ff_asf_head1_guid)) {
771 } else if (!ff_guidcmp(&g, &ff_asf_marker_header)) {
772 asf_read_marker(s, gsize);
773 } else if (pb->eof_reached) {
777 if (!ff_guidcmp(&g, &ff_asf_content_encryption)) {
778 av_log(s, AV_LOG_WARNING,
779 "DRM protected stream detected, decoding will likely fail!\n");
780 } else if (!ff_guidcmp(&g, &ff_asf_ext_content_encryption)) {
781 av_log(s, AV_LOG_WARNING,
782 "Ext DRM protected stream detected, decoding will likely fail!\n");
783 } else if (!ff_guidcmp(&g, &ff_asf_digital_signature)) {
784 av_log(s, AV_LOG_WARNING,
785 "Digital signature detected, decoding will likely fail!\n");
789 if (avio_tell(pb) != gpos + gsize)
790 av_log(s, AV_LOG_DEBUG,
791 "gpos mismatch our pos=%"PRIu64", end=%"PRId64"\n",
792 avio_tell(pb) - gpos, gsize);
793 avio_seek(pb, gpos + gsize, SEEK_SET);
801 asf->data_offset = avio_tell(pb);
802 asf->packet_size_left = 0;
804 for (i = 0; i < 128; i++) {
805 int stream_num = asf->asfid2avid[i];
806 if (stream_num >= 0) {
807 AVStream *st = s->streams[stream_num];
808 if (!st->codec->bit_rate)
809 st->codec->bit_rate = asf->stream_bitrates[i];
810 if (asf->dar[i].num > 0 && asf->dar[i].den > 0) {
811 av_reduce(&st->sample_aspect_ratio.num,
812 &st->sample_aspect_ratio.den,
813 asf->dar[i].num, asf->dar[i].den, INT_MAX);
814 } else if ((asf->dar[0].num > 0) && (asf->dar[0].den > 0) &&
815 // Use ASF container value if the stream doesn't set AR.
816 (st->codec->codec_type == AVMEDIA_TYPE_VIDEO))
817 av_reduce(&st->sample_aspect_ratio.num,
818 &st->sample_aspect_ratio.den,
819 asf->dar[0].num, asf->dar[0].den, INT_MAX);
821 av_dlog(s, "i=%d, st->codec->codec_type:%d, asf->dar %d:%d sar=%d:%d\n",
822 i, st->codec->codec_type, asf->dar[i].num, asf->dar[i].den,
823 st->sample_aspect_ratio.num, st->sample_aspect_ratio.den);
825 // copy and convert language codes to the frontend
826 if (asf->streams[i].stream_language_index < 128) {
827 const char *rfc1766 = asf->stream_languages[asf->streams[i].stream_language_index];
828 if (rfc1766 && strlen(rfc1766) > 1) {
829 const char primary_tag[3] = { rfc1766[0], rfc1766[1], '\0' }; // ignore country code if any
830 const char *iso6392 = av_convert_lang_to(primary_tag,
831 AV_LANG_ISO639_2_BIBL);
833 av_dict_set(&st->metadata, "language", iso6392, 0);
839 ff_metadata_conv(&s->metadata, NULL, ff_asf_metadata_conv);
844 #define DO_2BITS(bits, var, defval) \
845 switch (bits & 3) { \
847 var = avio_rl32(pb); \
851 var = avio_rl16(pb); \
864 * Load a single ASF packet into the demuxer.
865 * @param s demux context
866 * @param pb context to read data from
867 * @return 0 on success, <0 on error
869 static int asf_get_packet(AVFormatContext *s, AVIOContext *pb)
871 ASFContext *asf = s->priv_data;
872 uint32_t packet_length, padsize;
876 // if we do not know packet size, allow skipping up to 32 kB
878 if (asf->no_resync_search)
880 else if (s->packet_size > 0)
881 off = (avio_tell(pb) - s->internal->data_offset) % s->packet_size + 3;
888 if (c == 0x82 && !d && !e)
893 /* This code allows handling of -EAGAIN at packet boundaries (i.e.
894 * if the packet sync code above triggers -EAGAIN). This does not
895 * imply complete -EAGAIN handling support at random positions in
897 if (pb->error == AVERROR(EAGAIN))
898 return AVERROR(EAGAIN);
899 if (!pb->eof_reached)
900 av_log(s, AV_LOG_ERROR,
901 "ff asf bad header %x at:%"PRId64"\n", c, avio_tell(pb));
903 if ((c & 0x8f) == 0x82) {
905 if (!pb->eof_reached)
906 av_log(s, AV_LOG_ERROR, "ff asf bad non zero\n");
912 } else if (!pb->eof_reached) {
913 avio_seek(pb, -1, SEEK_CUR); // FIXME
916 asf->packet_flags = c;
917 asf->packet_property = d;
919 DO_2BITS(asf->packet_flags >> 5, packet_length, s->packet_size);
920 DO_2BITS(asf->packet_flags >> 1, padsize, 0); // sequence ignored
921 DO_2BITS(asf->packet_flags >> 3, padsize, 0); // padding length
923 // the following checks prevent overflows and infinite loops
924 if (!packet_length || packet_length >= (1U << 29)) {
925 av_log(s, AV_LOG_ERROR,
926 "invalid packet_length %"PRIu32" at:%"PRId64"\n",
927 packet_length, avio_tell(pb));
930 if (padsize >= packet_length) {
931 av_log(s, AV_LOG_ERROR,
932 "invalid padsize %"PRIu32" at:%"PRId64"\n", padsize, avio_tell(pb));
936 asf->packet_timestamp = avio_rl32(pb);
937 avio_rl16(pb); /* duration */
938 // rsize has at least 11 bytes which have to be present
940 if (asf->packet_flags & 0x01) {
941 asf->packet_segsizetype = avio_r8(pb);
943 asf->packet_segments = asf->packet_segsizetype & 0x3f;
945 asf->packet_segments = 1;
946 asf->packet_segsizetype = 0x80;
948 if (rsize > packet_length - padsize) {
949 asf->packet_size_left = 0;
950 av_log(s, AV_LOG_ERROR,
951 "invalid packet header length %d for pktlen %"PRIu32"-%"PRIu32" at %"PRId64"\n",
952 rsize, packet_length, padsize, avio_tell(pb));
955 asf->packet_size_left = packet_length - padsize - rsize;
956 if (packet_length < asf->hdr.min_pktsize)
957 padsize += asf->hdr.min_pktsize - packet_length;
958 asf->packet_padsize = padsize;
959 av_dlog(s, "packet: size=%d padsize=%d left=%d\n",
960 s->packet_size, asf->packet_padsize, asf->packet_size_left);
966 * @return <0 if error
968 static int asf_read_frame_header(AVFormatContext *s, AVIOContext *pb)
970 ASFContext *asf = s->priv_data;
972 int num = avio_r8(pb);
975 asf->packet_segments--;
976 asf->packet_key_frame = num >> 7;
977 asf->stream_index = asf->asfid2avid[num & 0x7f];
978 // sequence should be ignored!
979 DO_2BITS(asf->packet_property >> 4, asf->packet_seq, 0);
980 DO_2BITS(asf->packet_property >> 2, asf->packet_frag_offset, 0);
981 DO_2BITS(asf->packet_property, asf->packet_replic_size, 0);
982 av_dlog(asf, "key:%d stream:%d seq:%d offset:%d replic_size:%d\n",
983 asf->packet_key_frame, asf->stream_index, asf->packet_seq,
984 asf->packet_frag_offset, asf->packet_replic_size);
985 if (asf->packet_replic_size >= 8) {
986 asf->packet_obj_size = avio_rl32(pb);
987 if (asf->packet_obj_size >= (1 << 24) || asf->packet_obj_size <= 0) {
988 av_log(s, AV_LOG_ERROR, "packet_obj_size invalid\n");
991 asf->packet_frag_timestamp = avio_rl32(pb); // timestamp
992 if (asf->packet_replic_size >= 8 + 38 + 4) {
998 avio_skip(pb, asf->packet_replic_size - 8 - 38 - 4);
1000 asf->packet_frag_timestamp = ts0 / 10000;
1002 asf->packet_frag_timestamp = AV_NOPTS_VALUE;
1004 avio_skip(pb, asf->packet_replic_size - 8);
1005 rsize += asf->packet_replic_size; // FIXME - check validity
1006 } else if (asf->packet_replic_size == 1) {
1007 // multipacket - frag_offset is beginning timestamp
1008 asf->packet_time_start = asf->packet_frag_offset;
1009 asf->packet_frag_offset = 0;
1010 asf->packet_frag_timestamp = asf->packet_timestamp;
1012 asf->packet_time_delta = avio_r8(pb);
1014 } else if (asf->packet_replic_size != 0) {
1015 av_log(s, AV_LOG_ERROR, "unexpected packet_replic_size of %d\n",
1016 asf->packet_replic_size);
1019 if (asf->packet_flags & 0x01) {
1020 DO_2BITS(asf->packet_segsizetype >> 6, asf->packet_frag_size, 0); // 0 is illegal
1021 if (rsize > asf->packet_size_left) {
1022 av_log(s, AV_LOG_ERROR, "packet_replic_size is invalid\n");
1024 } else if (asf->packet_frag_size > asf->packet_size_left - rsize) {
1025 if (asf->packet_frag_size > asf->packet_size_left - rsize + asf->packet_padsize) {
1026 av_log(s, AV_LOG_ERROR, "packet_frag_size is invalid (%d-%d)\n",
1027 asf->packet_size_left, rsize);
1030 int diff = asf->packet_frag_size - (asf->packet_size_left - rsize);
1031 asf->packet_size_left += diff;
1032 asf->packet_padsize -= diff;
1036 if (rsize > asf->packet_size_left) {
1037 av_log(s, AV_LOG_ERROR, "packet_replic_size is invalid\n");
1040 asf->packet_frag_size = asf->packet_size_left - rsize;
1042 if (asf->packet_replic_size == 1) {
1043 asf->packet_multi_size = asf->packet_frag_size;
1044 if (asf->packet_multi_size > asf->packet_size_left)
1047 asf->packet_size_left -= rsize;
1053 * Parse data from individual ASF packets (which were previously loaded
1054 * with asf_get_packet()).
1055 * @param s demux context
1056 * @param pb context to read data from
1057 * @param pkt pointer to store packet data into
1058 * @return 0 if data was stored in pkt, <0 on error or 1 if more ASF
1059 * packets need to be loaded (through asf_get_packet())
1061 static int asf_parse_packet(AVFormatContext *s, AVIOContext *pb, AVPacket *pkt)
1063 ASFContext *asf = s->priv_data;
1064 ASFStream *asf_st = 0;
1068 if (pb->eof_reached)
1071 if (asf->packet_size_left < FRAME_HEADER_SIZE ||
1072 asf->packet_segments < 1) {
1073 int ret = asf->packet_size_left + asf->packet_padsize;
1079 asf->packet_pos = avio_tell(pb);
1080 if (asf->data_object_size != (uint64_t)-1 &&
1081 (asf->packet_pos - asf->data_object_offset >= asf->data_object_size))
1082 return AVERROR_EOF; /* Do not exceed the size of the data object */
1085 if (asf->packet_time_start == 0) {
1086 if (asf_read_frame_header(s, pb) < 0) {
1087 asf->packet_segments = 0;
1090 if (asf->stream_index < 0 ||
1091 s->streams[asf->stream_index]->discard >= AVDISCARD_ALL ||
1092 (!asf->packet_key_frame &&
1093 s->streams[asf->stream_index]->discard >= AVDISCARD_NONKEY)) {
1094 asf->packet_time_start = 0;
1095 /* unhandled packet (should not happen) */
1096 avio_skip(pb, asf->packet_frag_size);
1097 asf->packet_size_left -= asf->packet_frag_size;
1098 if (asf->stream_index < 0)
1099 av_log(s, AV_LOG_ERROR, "ff asf skip %d (unknown stream)\n",
1100 asf->packet_frag_size);
1103 asf->asf_st = s->streams[asf->stream_index]->priv_data;
1105 asf_st = asf->asf_st;
1108 if (!asf_st->frag_offset && asf->packet_frag_offset) {
1109 av_dlog(s, "skipping asf data pkt with fragment offset for "
1110 "stream:%d, expected:%d but got %d from pkt)\n",
1111 asf->stream_index, asf_st->frag_offset,
1112 asf->packet_frag_offset);
1113 avio_skip(pb, asf->packet_frag_size);
1114 asf->packet_size_left -= asf->packet_frag_size;
1118 if (asf->packet_replic_size == 1) {
1119 // frag_offset is here used as the beginning timestamp
1120 asf->packet_frag_timestamp = asf->packet_time_start;
1121 asf->packet_time_start += asf->packet_time_delta;
1122 asf->packet_obj_size = asf->packet_frag_size = avio_r8(pb);
1123 asf->packet_size_left--;
1124 asf->packet_multi_size--;
1125 if (asf->packet_multi_size < asf->packet_obj_size) {
1126 asf->packet_time_start = 0;
1127 avio_skip(pb, asf->packet_multi_size);
1128 asf->packet_size_left -= asf->packet_multi_size;
1131 asf->packet_multi_size -= asf->packet_obj_size;
1133 if (asf_st->frag_offset + asf->packet_frag_size <= asf_st->pkt.size &&
1134 asf_st->frag_offset + asf->packet_frag_size > asf->packet_obj_size) {
1135 av_log(s, AV_LOG_INFO, "ignoring invalid packet_obj_size (%d %d %d %d)\n",
1136 asf_st->frag_offset, asf->packet_frag_size,
1137 asf->packet_obj_size, asf_st->pkt.size);
1138 asf->packet_obj_size = asf_st->pkt.size;
1141 if (asf_st->pkt.size != asf->packet_obj_size ||
1142 // FIXME is this condition sufficient?
1143 asf_st->frag_offset + asf->packet_frag_size > asf_st->pkt.size) {
1144 if (asf_st->pkt.data) {
1145 av_log(s, AV_LOG_INFO,
1146 "freeing incomplete packet size %d, new %d\n",
1147 asf_st->pkt.size, asf->packet_obj_size);
1148 asf_st->frag_offset = 0;
1149 av_free_packet(&asf_st->pkt);
1152 av_new_packet(&asf_st->pkt, asf->packet_obj_size);
1153 asf_st->seq = asf->packet_seq;
1154 asf_st->pkt.dts = asf->packet_frag_timestamp - asf->hdr.preroll;
1155 asf_st->pkt.stream_index = asf->stream_index;
1156 asf_st->pkt.pos = asf_st->packet_pos = asf->packet_pos;
1158 if (asf_st->pkt.data && asf_st->palette_changed) {
1160 pal = av_packet_new_side_data(&asf_st->pkt, AV_PKT_DATA_PALETTE,
1163 av_log(s, AV_LOG_ERROR, "Cannot append palette to packet\n");
1165 memcpy(pal, asf_st->palette, AVPALETTE_SIZE);
1166 asf_st->palette_changed = 0;
1169 av_dlog(asf, "new packet: stream:%d key:%d packet_key:%d audio:%d size:%d\n",
1170 asf->stream_index, asf->packet_key_frame,
1171 asf_st->pkt.flags & AV_PKT_FLAG_KEY,
1172 s->streams[asf->stream_index]->codec->codec_type == AVMEDIA_TYPE_AUDIO,
1173 asf->packet_obj_size);
1174 if (s->streams[asf->stream_index]->codec->codec_type == AVMEDIA_TYPE_AUDIO)
1175 asf->packet_key_frame = 1;
1176 if (asf->packet_key_frame)
1177 asf_st->pkt.flags |= AV_PKT_FLAG_KEY;
1181 av_dlog(asf, "READ PACKET s:%d os:%d o:%d,%d l:%d DATA:%p\n",
1182 s->packet_size, asf_st->pkt.size, asf->packet_frag_offset,
1183 asf_st->frag_offset, asf->packet_frag_size, asf_st->pkt.data);
1184 asf->packet_size_left -= asf->packet_frag_size;
1185 if (asf->packet_size_left < 0)
1188 if (asf->packet_frag_offset >= asf_st->pkt.size ||
1189 asf->packet_frag_size > asf_st->pkt.size - asf->packet_frag_offset) {
1190 av_log(s, AV_LOG_ERROR,
1191 "packet fragment position invalid %u,%u not in %u\n",
1192 asf->packet_frag_offset, asf->packet_frag_size,
1197 ret = avio_read(pb, asf_st->pkt.data + asf->packet_frag_offset,
1198 asf->packet_frag_size);
1199 if (ret != asf->packet_frag_size) {
1200 if (ret < 0 || asf->packet_frag_offset + ret == 0)
1201 return ret < 0 ? ret : AVERROR_EOF;
1203 if (asf_st->ds_span > 1) {
1204 // scrambling, we can either drop it completely or fill the remainder
1205 // TODO: should we fill the whole packet instead of just the current
1207 memset(asf_st->pkt.data + asf->packet_frag_offset + ret, 0,
1208 asf->packet_frag_size - ret);
1209 ret = asf->packet_frag_size;
1211 // no scrambling, so we can return partial packets
1212 av_shrink_packet(&asf_st->pkt, asf->packet_frag_offset + ret);
1215 if (s->key && s->keylen == 20)
1216 ff_asfcrypt_dec(s->key, asf_st->pkt.data + asf->packet_frag_offset,
1218 asf_st->frag_offset += ret;
1219 /* test if whole packet is read */
1220 if (asf_st->frag_offset == asf_st->pkt.size) {
1221 // workaround for macroshit radio DVR-MS files
1222 if (s->streams[asf->stream_index]->codec->codec_id == AV_CODEC_ID_MPEG2VIDEO &&
1223 asf_st->pkt.size > 100) {
1225 for (i = 0; i < asf_st->pkt.size && !asf_st->pkt.data[i]; i++)
1227 if (i == asf_st->pkt.size) {
1228 av_log(s, AV_LOG_DEBUG, "discarding ms fart\n");
1229 asf_st->frag_offset = 0;
1230 av_free_packet(&asf_st->pkt);
1236 if (asf_st->ds_span > 1) {
1237 if (asf_st->pkt.size != asf_st->ds_packet_size * asf_st->ds_span) {
1238 av_log(s, AV_LOG_ERROR,
1239 "pkt.size != ds_packet_size * ds_span (%d %d %d)\n",
1240 asf_st->pkt.size, asf_st->ds_packet_size,
1243 /* packet descrambling */
1244 AVBufferRef *buf = av_buffer_alloc(asf_st->pkt.size +
1245 FF_INPUT_BUFFER_PADDING_SIZE);
1247 uint8_t *newdata = buf->data;
1249 memset(newdata + asf_st->pkt.size, 0,
1250 FF_INPUT_BUFFER_PADDING_SIZE);
1251 while (offset < asf_st->pkt.size) {
1252 int off = offset / asf_st->ds_chunk_size;
1253 int row = off / asf_st->ds_span;
1254 int col = off % asf_st->ds_span;
1255 int idx = row + col * asf_st->ds_packet_size / asf_st->ds_chunk_size;
1256 assert(offset + asf_st->ds_chunk_size <= asf_st->pkt.size);
1257 assert(idx + 1 <= asf_st->pkt.size / asf_st->ds_chunk_size);
1258 memcpy(newdata + offset,
1259 asf_st->pkt.data + idx * asf_st->ds_chunk_size,
1260 asf_st->ds_chunk_size);
1261 offset += asf_st->ds_chunk_size;
1263 av_buffer_unref(&asf_st->pkt.buf);
1264 asf_st->pkt.buf = buf;
1265 asf_st->pkt.data = buf->data;
1269 asf_st->frag_offset = 0;
1271 #if FF_API_DESTRUCT_PACKET
1272 FF_DISABLE_DEPRECATION_WARNINGS
1273 asf_st->pkt.destruct = NULL;
1274 FF_ENABLE_DEPRECATION_WARNINGS
1276 asf_st->pkt.buf = 0;
1277 asf_st->pkt.size = 0;
1278 asf_st->pkt.data = 0;
1279 asf_st->pkt.side_data_elems = 0;
1280 asf_st->pkt.side_data = NULL;
1281 break; // packet completed
1287 static int asf_read_packet(AVFormatContext *s, AVPacket *pkt)
1289 ASFContext *asf = s->priv_data;
1294 /* parse cached packets, if any */
1295 if ((ret = asf_parse_packet(s, s->pb, pkt)) <= 0)
1297 if ((ret = asf_get_packet(s, s->pb)) < 0)
1298 assert(asf->packet_size_left < FRAME_HEADER_SIZE ||
1299 asf->packet_segments < 1);
1300 asf->packet_time_start = 0;
1304 // Added to support seeking after packets have been read
1305 // If information is not reset, read_packet fails due to
1306 // leftover information from previous reads
1307 static void asf_reset_header(AVFormatContext *s)
1309 ASFContext *asf = s->priv_data;
1313 asf->packet_size_left = 0;
1314 asf->packet_segments = 0;
1315 asf->packet_flags = 0;
1316 asf->packet_property = 0;
1317 asf->packet_timestamp = 0;
1318 asf->packet_segsizetype = 0;
1319 asf->packet_segments = 0;
1320 asf->packet_seq = 0;
1321 asf->packet_replic_size = 0;
1322 asf->packet_key_frame = 0;
1323 asf->packet_padsize = 0;
1324 asf->packet_frag_offset = 0;
1325 asf->packet_frag_size = 0;
1326 asf->packet_frag_timestamp = 0;
1327 asf->packet_multi_size = 0;
1328 asf->packet_obj_size = 0;
1329 asf->packet_time_delta = 0;
1330 asf->packet_time_start = 0;
1332 for (i = 0; i < s->nb_streams; i++) {
1333 asf_st = s->streams[i]->priv_data;
1336 av_free_packet(&asf_st->pkt);
1337 asf_st->frag_offset = 0;
1343 static int asf_read_close(AVFormatContext *s)
1345 asf_reset_header(s);
1350 static int64_t asf_read_pts(AVFormatContext *s, int stream_index,
1351 int64_t *ppos, int64_t pos_limit)
1353 AVPacket pkt1, *pkt = &pkt1;
1356 int64_t pos = *ppos;
1358 int64_t start_pos[ASF_MAX_STREAMS];
1360 for (i = 0; i < s->nb_streams; i++)
1363 if (s->packet_size > 0)
1364 pos = (pos + s->packet_size - 1 - s->internal->data_offset) /
1365 s->packet_size * s->packet_size +
1366 s->internal->data_offset;
1368 avio_seek(s->pb, pos, SEEK_SET);
1370 asf_reset_header(s);
1372 if (asf_read_packet(s, pkt) < 0) {
1373 av_log(s, AV_LOG_INFO, "asf_read_pts failed\n");
1374 return AV_NOPTS_VALUE;
1379 av_free_packet(pkt);
1380 if (pkt->flags & AV_PKT_FLAG_KEY) {
1381 i = pkt->stream_index;
1383 asf_st = s->streams[i]->priv_data;
1386 // assert((asf_st->packet_pos - s->data_offset) % s->packet_size == 0);
1387 pos = asf_st->packet_pos;
1389 av_add_index_entry(s->streams[i], pos, pts, pkt->size,
1390 pos - start_pos[i] + 1, AVINDEX_KEYFRAME);
1391 start_pos[i] = asf_st->packet_pos + 1;
1393 if (pkt->stream_index == stream_index)
1402 static int asf_build_simple_index(AVFormatContext *s, int stream_index)
1405 ASFContext *asf = s->priv_data;
1406 int64_t current_pos = avio_tell(s->pb);
1409 avio_seek(s->pb, asf->data_object_offset + asf->data_object_size, SEEK_SET);
1410 if ((ret = ff_get_guid(s->pb, &g)) < 0)
1413 /* the data object can be followed by other top-level objects,
1414 * skip them until the simple index object is reached */
1415 while (ff_guidcmp(&g, &index_guid)) {
1416 int64_t gsize = avio_rl64(s->pb);
1417 if (gsize < 24 || s->pb->eof_reached) {
1420 avio_skip(s->pb, gsize - 24);
1421 if ((ret = ff_get_guid(s->pb, &g)) < 0)
1426 int64_t itime, last_pos = -1;
1428 int64_t av_unused gsize = avio_rl64(s->pb);
1429 if ((ret = ff_get_guid(s->pb, &g)) < 0)
1431 itime = avio_rl64(s->pb);
1432 pct = avio_rl32(s->pb);
1433 ict = avio_rl32(s->pb);
1434 av_log(s, AV_LOG_DEBUG,
1435 "itime:0x%"PRIx64", pct:%d, ict:%d\n", itime, pct, ict);
1437 for (i = 0; i < ict; i++) {
1438 int pktnum = avio_rl32(s->pb);
1439 int pktct = avio_rl16(s->pb);
1440 int64_t pos = s->internal->data_offset + s->packet_size * (int64_t)pktnum;
1441 int64_t index_pts = FFMAX(av_rescale(itime, i, 10000) - asf->hdr.preroll, 0);
1443 if (pos != last_pos) {
1444 av_log(s, AV_LOG_DEBUG, "pktnum:%d, pktct:%d pts: %"PRId64"\n",
1445 pktnum, pktct, index_pts);
1446 av_add_index_entry(s->streams[stream_index], pos, index_pts,
1447 s->packet_size, 0, AVINDEX_KEYFRAME);
1451 asf->index_read = ict > 0;
1454 if (s->pb->eof_reached)
1456 avio_seek(s->pb, current_pos, SEEK_SET);
1460 static int asf_read_seek(AVFormatContext *s, int stream_index,
1461 int64_t pts, int flags)
1463 ASFContext *asf = s->priv_data;
1464 AVStream *st = s->streams[stream_index];
1468 if (s->packet_size <= 0)
1471 /* Try using the protocol's read_seek if available */
1473 int ret = avio_seek_time(s->pb, stream_index, pts, flags);
1475 asf_reset_header(s);
1476 if (ret != AVERROR(ENOSYS))
1480 /* explicitly handle the case of seeking to 0 */
1482 asf_reset_header(s);
1483 avio_seek(s->pb, s->internal->data_offset, SEEK_SET);
1487 if (!asf->index_read)
1488 ret = asf_build_simple_index(s, stream_index);
1490 if (!ret && asf->index_read && st->index_entries) {
1491 index = av_index_search_timestamp(st, pts, flags);
1493 /* find the position */
1494 pos = st->index_entries[index].pos;
1497 av_log(s, AV_LOG_DEBUG, "SEEKTO: %"PRId64"\n", pos);
1498 avio_seek(s->pb, pos, SEEK_SET);
1499 asf_reset_header(s);
1503 /* no index or seeking by index failed */
1504 if (ff_seek_frame_binary(s, stream_index, pts, flags) < 0)
1506 asf_reset_header(s);
1510 AVInputFormat ff_asf_demuxer = {
1512 .long_name = NULL_IF_CONFIG_SMALL("ASF (Advanced / Active Streaming Format)"),
1513 .priv_data_size = sizeof(ASFContext),
1514 .read_probe = asf_probe,
1515 .read_header = asf_read_header,
1516 .read_packet = asf_read_packet,
1517 .read_close = asf_read_close,
1518 .read_seek = asf_read_seek,
1519 .read_timestamp = asf_read_pts,
1520 .flags = AVFMT_NOBINSEARCH | AVFMT_NOGENSEARCH,
1521 .priv_class = &asf_class,