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
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;
71 int packet_time_delta;
72 int packet_time_start;
77 ASFStream *asf_st; ///< currently decoded stream
82 static const AVOption options[] = {
83 { "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 },
87 static const AVClass asf_class = {
88 .class_name = "asf demuxer",
89 .item_name = av_default_item_name,
91 .version = LIBAVUTIL_VERSION_INT,
97 #define ASF_MAX_STREAMS 127
98 #define FRAME_HEADER_SIZE 16
99 // Fix Me! FRAME_HEADER_SIZE may be different. (17 is known to be too large)
102 static const ff_asf_guid stream_bitrate_guid = { /* (http://get.to/sdp) */
103 0xce, 0x75, 0xf8, 0x7b, 0x8d, 0x46, 0xd1, 0x11, 0x8d, 0x82, 0x00, 0x60, 0x97, 0xc9, 0xa2, 0xb2
106 #define PRINT_IF_GUID(g, cmp) \
107 if (!ff_guidcmp(g, &cmp)) \
108 av_dlog(NULL, "(GUID: %s) ", # cmp)
110 static void print_guid(ff_asf_guid *g)
113 PRINT_IF_GUID(g, ff_asf_header);
114 else PRINT_IF_GUID(g, ff_asf_file_header);
115 else PRINT_IF_GUID(g, ff_asf_stream_header);
116 else PRINT_IF_GUID(g, ff_asf_audio_stream);
117 else PRINT_IF_GUID(g, ff_asf_audio_conceal_none);
118 else PRINT_IF_GUID(g, ff_asf_video_stream);
119 else PRINT_IF_GUID(g, ff_asf_video_conceal_none);
120 else PRINT_IF_GUID(g, ff_asf_command_stream);
121 else PRINT_IF_GUID(g, ff_asf_comment_header);
122 else PRINT_IF_GUID(g, ff_asf_codec_comment_header);
123 else PRINT_IF_GUID(g, ff_asf_codec_comment1_header);
124 else PRINT_IF_GUID(g, ff_asf_data_header);
125 else PRINT_IF_GUID(g, ff_asf_simple_index_header);
126 else PRINT_IF_GUID(g, ff_asf_head1_guid);
127 else PRINT_IF_GUID(g, ff_asf_head2_guid);
128 else PRINT_IF_GUID(g, ff_asf_my_guid);
129 else PRINT_IF_GUID(g, ff_asf_ext_stream_header);
130 else PRINT_IF_GUID(g, ff_asf_extended_content_header);
131 else PRINT_IF_GUID(g, ff_asf_ext_stream_embed_stream_header);
132 else PRINT_IF_GUID(g, ff_asf_ext_stream_audio_stream);
133 else PRINT_IF_GUID(g, ff_asf_metadata_header);
134 else PRINT_IF_GUID(g, ff_asf_metadata_library_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 /* size of type 2 (BOOL) is 32bit for "Extended Content Description Object"
159 * but 16 bit for "Metadata Object" and "Metadata Library Object" */
160 static int get_value(AVIOContext *pb, int type, int type2_size)
164 return (type2_size == 32) ? avio_rl32(pb) : avio_rl16(pb);
166 return avio_rl32(pb);
168 return avio_rl64(pb);
170 return avio_rl16(pb);
176 /* MSDN claims that this should be "compatible with the ID3 frame, APIC",
177 * but in reality this is only loosely similar */
178 static int asf_read_picture(AVFormatContext *s, int len)
180 AVPacket pkt = { 0 };
181 const CodecMime *mime = ff_id3v2_mime_tags;
182 enum AVCodecID id = AV_CODEC_ID_NONE;
184 uint8_t *desc = NULL;
186 int ret, type, picsize, desc_len;
188 /* type + picsize + mime + desc */
189 if (len < 1 + 4 + 2 + 2) {
190 av_log(s, AV_LOG_ERROR, "Invalid attached picture size: %d.\n", len);
191 return AVERROR_INVALIDDATA;
195 type = avio_r8(s->pb);
197 if (type >= FF_ARRAY_ELEMS(ff_id3v2_picture_types) || type < 0) {
198 av_log(s, AV_LOG_WARNING, "Unknown attached picture type: %d.\n", type);
202 /* picture data size */
203 picsize = avio_rl32(s->pb);
206 /* picture MIME type */
207 len -= avio_get_str16le(s->pb, len, mimetype, sizeof(mimetype));
208 while (mime->id != AV_CODEC_ID_NONE) {
209 if (!strncmp(mime->str, mimetype, sizeof(mimetype))) {
215 if (id == AV_CODEC_ID_NONE) {
216 av_log(s, AV_LOG_ERROR, "Unknown attached picture mimetype: %s.\n",
221 if (picsize >= len) {
222 av_log(s, AV_LOG_ERROR, "Invalid attached picture data size: %d >= %d.\n",
224 return AVERROR_INVALIDDATA;
227 /* picture description */
228 desc_len = (len - picsize) * 2 + 1;
229 desc = av_malloc(desc_len);
231 return AVERROR(ENOMEM);
232 len -= avio_get_str16le(s->pb, len - picsize, desc, desc_len);
234 ret = av_get_packet(s->pb, &pkt, picsize);
238 st = avformat_new_stream(s, NULL);
240 ret = AVERROR(ENOMEM);
243 st->disposition |= AV_DISPOSITION_ATTACHED_PIC;
244 st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
245 st->codec->codec_id = id;
246 st->attached_pic = pkt;
247 st->attached_pic.stream_index = st->index;
248 st->attached_pic.flags |= AV_PKT_FLAG_KEY;
251 av_dict_set(&st->metadata, "title", desc, AV_DICT_DONT_STRDUP_VAL);
255 av_dict_set(&st->metadata, "comment", ff_id3v2_picture_types[type], 0);
261 av_free_packet(&pkt);
265 static void get_id3_tag(AVFormatContext *s, int len)
267 ID3v2ExtraMeta *id3v2_extra_meta = NULL;
269 ff_id3v2_read(s, ID3v2_DEFAULT_MAGIC, &id3v2_extra_meta);
270 if (id3v2_extra_meta)
271 ff_id3v2_parse_apic(s, &id3v2_extra_meta);
272 ff_id3v2_free_extra_meta(&id3v2_extra_meta);
275 static void get_tag(AVFormatContext *s, const char *key, int type, int len, int type2_size)
278 int64_t off = avio_tell(s->pb);
281 if ((unsigned)len >= (UINT_MAX - LEN) / 2)
284 value = av_malloc(2 * len + LEN);
288 if (type == 0) { // UTF16-LE
289 avio_get_str16le(s->pb, len, value, 2 * len + 1);
290 } else if (type == -1) { // ASCII
291 avio_read(s->pb, value, len);
293 } else if (type == 1) { // byte array
294 if (!strcmp(key, "WM/Picture")) { // handle cover art
295 asf_read_picture(s, len);
296 } else if (!strcmp(key, "ID3")) { // handle ID3 tag
299 av_log(s, AV_LOG_VERBOSE, "Unsupported byte array in tag %s.\n", key);
302 } else if (type > 1 && type <= 5) { // boolean or DWORD or QWORD or WORD
303 uint64_t num = get_value(s->pb, type, type2_size);
304 snprintf(value, LEN, "%"PRIu64, num);
305 } else if (type == 6) { // (don't) handle GUID
306 av_log(s, AV_LOG_DEBUG, "Unsupported GUID value in tag %s.\n", key);
309 av_log(s, AV_LOG_DEBUG,
310 "Unsupported value type %d in tag %s.\n", type, key);
314 av_dict_set(&s->metadata, key, value, 0);
318 avio_seek(s->pb, off + len, SEEK_SET);
321 static int asf_read_file_properties(AVFormatContext *s, int64_t size)
323 ASFContext *asf = s->priv_data;
324 AVIOContext *pb = s->pb;
326 ff_get_guid(pb, &asf->hdr.guid);
327 asf->hdr.file_size = avio_rl64(pb);
328 asf->hdr.create_time = avio_rl64(pb);
329 avio_rl64(pb); /* number of packets */
330 asf->hdr.play_time = avio_rl64(pb);
331 asf->hdr.send_time = avio_rl64(pb);
332 asf->hdr.preroll = avio_rl32(pb);
333 asf->hdr.ignore = avio_rl32(pb);
334 asf->hdr.flags = avio_rl32(pb);
335 asf->hdr.min_pktsize = avio_rl32(pb);
336 asf->hdr.max_pktsize = avio_rl32(pb);
337 if (asf->hdr.min_pktsize >= (1U << 29))
338 return AVERROR_INVALIDDATA;
339 asf->hdr.max_bitrate = avio_rl32(pb);
340 s->packet_size = asf->hdr.max_pktsize;
345 static int asf_read_stream_properties(AVFormatContext *s, int64_t size)
347 ASFContext *asf = s->priv_data;
348 AVIOContext *pb = s->pb;
352 enum AVMediaType type;
353 int type_specific_size, sizeX;
355 int64_t pos1, pos2, start_time;
356 int test_for_ext_stream_audio, is_dvr_ms_audio = 0;
358 if (s->nb_streams == ASF_MAX_STREAMS) {
359 av_log(s, AV_LOG_ERROR, "too many streams\n");
360 return AVERROR(EINVAL);
363 pos1 = avio_tell(pb);
365 st = avformat_new_stream(s, NULL);
367 return AVERROR(ENOMEM);
368 avpriv_set_pts_info(st, 32, 1, 1000); /* 32 bit pts in ms */
369 start_time = asf->hdr.preroll;
371 if (!(asf->hdr.flags & 0x01)) { // if we aren't streaming...
372 int64_t fsize = avio_size(pb);
373 if (fsize <= 0 || (int64_t)asf->hdr.file_size <= 0 || FFABS(fsize - (int64_t)asf->hdr.file_size) < 10000)
374 st->duration = asf->hdr.play_time /
375 (10000000 / 1000) - start_time;
379 test_for_ext_stream_audio = 0;
380 if (!ff_guidcmp(&g, &ff_asf_audio_stream)) {
381 type = AVMEDIA_TYPE_AUDIO;
382 } else if (!ff_guidcmp(&g, &ff_asf_video_stream)) {
383 type = AVMEDIA_TYPE_VIDEO;
384 } else if (!ff_guidcmp(&g, &ff_asf_jfif_media)) {
385 type = AVMEDIA_TYPE_VIDEO;
386 st->codec->codec_id = AV_CODEC_ID_MJPEG;
387 } else if (!ff_guidcmp(&g, &ff_asf_command_stream)) {
388 type = AVMEDIA_TYPE_DATA;
389 } else if (!ff_guidcmp(&g, &ff_asf_ext_stream_embed_stream_header)) {
390 test_for_ext_stream_audio = 1;
391 type = AVMEDIA_TYPE_UNKNOWN;
396 avio_skip(pb, 8); /* total_size */
397 type_specific_size = avio_rl32(pb);
399 st->id = avio_rl16(pb) & 0x7f; /* stream id */
400 // mapping of asf ID to AV stream ID;
401 asf->asfid2avid[st->id] = s->nb_streams - 1;
402 asf_st = &asf->streams[st->id];
406 if (test_for_ext_stream_audio) {
408 if (!ff_guidcmp(&g, &ff_asf_ext_stream_audio_stream)) {
409 type = AVMEDIA_TYPE_AUDIO;
420 st->codec->codec_type = type;
421 if (type == AVMEDIA_TYPE_AUDIO) {
422 int ret = ff_get_wav_header(pb, st->codec, type_specific_size);
425 if (is_dvr_ms_audio) {
426 // codec_id and codec_tag are unreliable in dvr_ms
427 // files. Set them later by probing stream.
428 st->request_probe = 1;
429 st->codec->codec_tag = 0;
431 if (st->codec->codec_id == AV_CODEC_ID_AAC)
432 st->need_parsing = AVSTREAM_PARSE_NONE;
434 st->need_parsing = AVSTREAM_PARSE_FULL;
435 /* We have to init the frame size at some point .... */
436 pos2 = avio_tell(pb);
437 if (size >= (pos2 + 8 - pos1 + 24)) {
438 asf_st->ds_span = avio_r8(pb);
439 asf_st->ds_packet_size = avio_rl16(pb);
440 asf_st->ds_chunk_size = avio_rl16(pb);
441 avio_rl16(pb); // ds_data_size
442 avio_r8(pb); // ds_silence_data
444 if (asf_st->ds_span > 1) {
445 if (!asf_st->ds_chunk_size ||
446 (asf_st->ds_packet_size / asf_st->ds_chunk_size <= 1) ||
447 asf_st->ds_packet_size % asf_st->ds_chunk_size)
448 asf_st->ds_span = 0; // disable descrambling
450 } else if (type == AVMEDIA_TYPE_VIDEO &&
451 size - (avio_tell(pb) - pos1 + 24) >= 51) {
455 avio_rl16(pb); /* size */
456 sizeX = avio_rl32(pb); /* size */
457 st->codec->width = avio_rl32(pb);
458 st->codec->height = avio_rl32(pb);
459 /* not available for asf */
460 avio_rl16(pb); /* panes */
461 st->codec->bits_per_coded_sample = avio_rl16(pb); /* depth */
462 tag1 = avio_rl32(pb);
465 st->codec->extradata_size = ffio_limit(pb, sizeX - 40);
466 st->codec->extradata = av_mallocz(st->codec->extradata_size +
467 FF_INPUT_BUFFER_PADDING_SIZE);
468 avio_read(pb, st->codec->extradata, st->codec->extradata_size);
471 /* Extract palette from extradata if bpp <= 8 */
472 /* This code assumes that extradata contains only palette */
473 /* This is true for all paletted codecs implemented in libavcodec */
474 if (st->codec->extradata_size && (st->codec->bits_per_coded_sample <= 8)) {
477 for (i = 0; i < FFMIN(st->codec->extradata_size, AVPALETTE_SIZE) / 4; i++)
478 asf_st->palette[i] = av_bswap32(((uint32_t *)st->codec->extradata)[i]);
480 memcpy(asf_st->palette, st->codec->extradata,
481 FFMIN(st->codec->extradata_size, AVPALETTE_SIZE));
483 asf_st->palette_changed = 1;
486 st->codec->codec_tag = tag1;
487 st->codec->codec_id = ff_codec_get_id(ff_codec_bmp_tags, tag1);
488 if (tag1 == MKTAG('D', 'V', 'R', ' ')) {
489 st->need_parsing = AVSTREAM_PARSE_FULL;
490 /* issue658 contains wrong w/h and MS even puts a fake seq header
491 * with wrong w/h in extradata while a correct one is in the stream.
492 * maximum lameness */
494 st->codec->height = 0;
495 av_freep(&st->codec->extradata);
496 st->codec->extradata_size = 0;
498 if (st->codec->codec_id == AV_CODEC_ID_H264)
499 st->need_parsing = AVSTREAM_PARSE_FULL_ONCE;
501 pos2 = avio_tell(pb);
502 avio_skip(pb, size - (pos2 - pos1 + 24));
507 static int asf_read_ext_stream_properties(AVFormatContext *s, int64_t size)
509 ASFContext *asf = s->priv_data;
510 AVIOContext *pb = s->pb;
512 int ext_len, payload_ext_ct, stream_ct, i;
513 uint32_t leak_rate, stream_num;
514 unsigned int stream_languageid_index;
516 avio_rl64(pb); // starttime
517 avio_rl64(pb); // endtime
518 leak_rate = avio_rl32(pb); // leak-datarate
519 avio_rl32(pb); // bucket-datasize
520 avio_rl32(pb); // init-bucket-fullness
521 avio_rl32(pb); // alt-leak-datarate
522 avio_rl32(pb); // alt-bucket-datasize
523 avio_rl32(pb); // alt-init-bucket-fullness
524 avio_rl32(pb); // max-object-size
525 avio_rl32(pb); // flags (reliable,seekable,no_cleanpoints?,resend-live-cleanpoints, rest of bits reserved)
526 stream_num = avio_rl16(pb); // stream-num
528 stream_languageid_index = avio_rl16(pb); // stream-language-id-index
529 if (stream_num < 128)
530 asf->streams[stream_num].stream_language_index = stream_languageid_index;
532 avio_rl64(pb); // avg frametime in 100ns units
533 stream_ct = avio_rl16(pb); // stream-name-count
534 payload_ext_ct = avio_rl16(pb); // payload-extension-system-count
536 if (stream_num < 128) {
537 asf->stream_bitrates[stream_num] = leak_rate;
538 asf->streams[stream_num].payload_ext_ct = 0;
541 for (i = 0; i < stream_ct; i++) {
543 ext_len = avio_rl16(pb);
544 avio_skip(pb, ext_len);
547 for (i = 0; i < payload_ext_ct; i++) {
550 size = avio_rl16(pb);
551 ext_len = avio_rl32(pb);
552 avio_skip(pb, ext_len);
553 if (stream_num < 128 && i < FF_ARRAY_ELEMS(asf->streams[stream_num].payload)) {
554 ASFPayload *p = &asf->streams[stream_num].payload[i];
557 av_log(s, AV_LOG_DEBUG, "Payload extension %x %d\n", g[0], p->size );
558 asf->streams[stream_num].payload_ext_ct ++;
565 static int asf_read_content_desc(AVFormatContext *s, int64_t size)
567 AVIOContext *pb = s->pb;
568 int len1, len2, len3, len4, len5;
570 len1 = avio_rl16(pb);
571 len2 = avio_rl16(pb);
572 len3 = avio_rl16(pb);
573 len4 = avio_rl16(pb);
574 len5 = avio_rl16(pb);
575 get_tag(s, "title", 0, len1, 32);
576 get_tag(s, "author", 0, len2, 32);
577 get_tag(s, "copyright", 0, len3, 32);
578 get_tag(s, "comment", 0, len4, 32);
584 static int asf_read_ext_content_desc(AVFormatContext *s, int64_t size)
586 AVIOContext *pb = s->pb;
587 ASFContext *asf = s->priv_data;
588 int desc_count, i, ret;
590 desc_count = avio_rl16(pb);
591 for (i = 0; i < desc_count; i++) {
592 int name_len, value_type, value_len;
595 name_len = avio_rl16(pb);
596 if (name_len % 2) // must be even, broken lavf versions wrote len-1
598 if ((ret = avio_get_str16le(pb, name_len, name, sizeof(name))) < name_len)
599 avio_skip(pb, name_len - ret);
600 value_type = avio_rl16(pb);
601 value_len = avio_rl16(pb);
602 if (!value_type && value_len % 2)
604 /* My sample has that stream set to 0 maybe that mean the container.
605 * ASF stream count starts at 1. I am using 0 to the container value
606 * since it's unused. */
607 if (!strcmp(name, "AspectRatioX"))
608 asf->dar[0].num = get_value(s->pb, value_type, 32);
609 else if (!strcmp(name, "AspectRatioY"))
610 asf->dar[0].den = get_value(s->pb, value_type, 32);
612 get_tag(s, name, value_type, value_len, 32);
618 static int asf_read_language_list(AVFormatContext *s, int64_t size)
620 AVIOContext *pb = s->pb;
621 ASFContext *asf = s->priv_data;
623 int stream_count = avio_rl16(pb);
624 for (j = 0; j < stream_count; j++) {
626 unsigned int lang_len = avio_r8(pb);
627 if ((ret = avio_get_str16le(pb, lang_len, lang,
628 sizeof(lang))) < lang_len)
629 avio_skip(pb, lang_len - ret);
631 av_strlcpy(asf->stream_languages[j], lang,
632 sizeof(*asf->stream_languages));
638 static int asf_read_metadata(AVFormatContext *s, int64_t size)
640 AVIOContext *pb = s->pb;
641 ASFContext *asf = s->priv_data;
642 int n, stream_num, name_len, value_len;
646 for (i = 0; i < n; i++) {
650 avio_rl16(pb); // lang_list_index
651 stream_num = avio_rl16(pb);
652 name_len = avio_rl16(pb);
653 value_type = avio_rl16(pb); /* value_type */
654 value_len = avio_rl32(pb);
656 if ((ret = avio_get_str16le(pb, name_len, name, sizeof(name))) < name_len)
657 avio_skip(pb, name_len - ret);
658 av_dlog(s, "%d stream %d name_len %2d type %d len %4d <%s>\n",
659 i, stream_num, name_len, value_type, value_len, name);
661 if (!strcmp(name, "AspectRatioX")){
662 int aspect_x = get_value(s->pb, value_type, 16);
664 asf->dar[stream_num].num = aspect_x;
665 } else if(!strcmp(name, "AspectRatioY")){
666 int aspect_y = get_value(s->pb, value_type, 16);
668 asf->dar[stream_num].den = aspect_y;
670 get_tag(s, name, value_type, value_len, 16);
677 static int asf_read_marker(AVFormatContext *s, int64_t size)
679 AVIOContext *pb = s->pb;
680 int i, count, name_len, ret;
683 avio_rl64(pb); // reserved 16 bytes
684 avio_rl64(pb); // ...
685 count = avio_rl32(pb); // markers count
686 avio_rl16(pb); // reserved 2 bytes
687 name_len = avio_rl16(pb); // name length
688 for (i = 0; i < name_len; i++)
689 avio_r8(pb); // skip the name
691 for (i = 0; i < count; i++) {
695 avio_rl64(pb); // offset, 8 bytes
696 pres_time = avio_rl64(pb); // presentation time
697 avio_rl16(pb); // entry length
698 avio_rl32(pb); // send time
699 avio_rl32(pb); // flags
700 name_len = avio_rl32(pb); // name length
701 if ((ret = avio_get_str16le(pb, name_len * 2, name,
702 sizeof(name))) < name_len)
703 avio_skip(pb, name_len - ret);
704 avpriv_new_chapter(s, i, (AVRational) { 1, 10000000 }, pres_time,
705 AV_NOPTS_VALUE, name);
711 static int asf_read_header(AVFormatContext *s)
713 ASFContext *asf = s->priv_data;
715 AVIOContext *pb = s->pb;
720 if (ff_guidcmp(&g, &ff_asf_header))
721 return AVERROR_INVALIDDATA;
726 memset(&asf->asfid2avid, -1, sizeof(asf->asfid2avid));
728 for (i = 0; i<128; i++)
729 asf->streams[i].stream_language_index = 128; // invalid stream index means no language info
732 uint64_t gpos = avio_tell(pb);
734 gsize = avio_rl64(pb);
736 if (!ff_guidcmp(&g, &ff_asf_data_header)) {
737 asf->data_object_offset = avio_tell(pb);
738 /* If not streaming, gsize is not unlimited (how?),
739 * and there is enough space in the file.. */
740 if (!(asf->hdr.flags & 0x01) && gsize >= 100)
741 asf->data_object_size = gsize - 24;
743 asf->data_object_size = (uint64_t)-1;
747 return AVERROR_INVALIDDATA;
748 if (!ff_guidcmp(&g, &ff_asf_file_header)) {
749 int ret = asf_read_file_properties(s, gsize);
752 } else if (!ff_guidcmp(&g, &ff_asf_stream_header)) {
753 asf_read_stream_properties(s, gsize);
754 } else if (!ff_guidcmp(&g, &ff_asf_comment_header)) {
755 asf_read_content_desc(s, gsize);
756 } else if (!ff_guidcmp(&g, &ff_asf_language_guid)) {
757 asf_read_language_list(s, gsize);
758 } else if (!ff_guidcmp(&g, &ff_asf_extended_content_header)) {
759 asf_read_ext_content_desc(s, gsize);
760 } else if (!ff_guidcmp(&g, &ff_asf_metadata_header)) {
761 asf_read_metadata(s, gsize);
762 } else if (!ff_guidcmp(&g, &ff_asf_metadata_library_header)) {
763 asf_read_metadata(s, gsize);
764 } else if (!ff_guidcmp(&g, &ff_asf_ext_stream_header)) {
765 asf_read_ext_stream_properties(s, gsize);
767 // there could be a optional stream properties object to follow
768 // if so the next iteration will pick it up
770 } else if (!ff_guidcmp(&g, &ff_asf_head1_guid)) {
774 } else if (!ff_guidcmp(&g, &ff_asf_marker_header)) {
775 asf_read_marker(s, gsize);
776 } else if (url_feof(pb)) {
780 if (!ff_guidcmp(&g, &ff_asf_content_encryption)) {
783 av_log(s, AV_LOG_WARNING,
784 "DRM protected stream detected, decoding will likely fail!\n");
786 av_log(s, AV_LOG_DEBUG, "Secret data:\n");
787 av_get_packet(pb, &pkt, len); av_hex_dump_log(s, AV_LOG_DEBUG, pkt.data, pkt.size); av_free_packet(&pkt);
789 get_tag(s, "ASF_Protection_Type", -1, len, 32);
791 get_tag(s, "ASF_Key_ID", -1, len, 32);
793 get_tag(s, "ASF_License_URL", -1, len, 32);
794 } else if (!ff_guidcmp(&g, &ff_asf_ext_content_encryption)) {
795 av_log(s, AV_LOG_WARNING,
796 "Ext DRM protected stream detected, decoding will likely fail!\n");
797 av_dict_set(&s->metadata, "encryption", "ASF Extended Content Encryption", 0);
798 } else if (!ff_guidcmp(&g, &ff_asf_digital_signature)) {
799 av_log(s, AV_LOG_INFO, "Digital signature detected!\n");
803 if (avio_tell(pb) != gpos + gsize)
804 av_log(s, AV_LOG_DEBUG,
805 "gpos mismatch our pos=%"PRIu64", end=%"PRId64"\n",
806 avio_tell(pb) - gpos, gsize);
807 avio_seek(pb, gpos + gsize, SEEK_SET);
815 asf->data_offset = avio_tell(pb);
816 asf->packet_size_left = 0;
818 for (i = 0; i < 128; i++) {
819 int stream_num = asf->asfid2avid[i];
820 if (stream_num >= 0) {
821 AVStream *st = s->streams[stream_num];
822 if (!st->codec->bit_rate)
823 st->codec->bit_rate = asf->stream_bitrates[i];
824 if (asf->dar[i].num > 0 && asf->dar[i].den > 0) {
825 av_reduce(&st->sample_aspect_ratio.num,
826 &st->sample_aspect_ratio.den,
827 asf->dar[i].num, asf->dar[i].den, INT_MAX);
828 } else if ((asf->dar[0].num > 0) && (asf->dar[0].den > 0) &&
829 // Use ASF container value if the stream doesn't set AR.
830 (st->codec->codec_type == AVMEDIA_TYPE_VIDEO))
831 av_reduce(&st->sample_aspect_ratio.num,
832 &st->sample_aspect_ratio.den,
833 asf->dar[0].num, asf->dar[0].den, INT_MAX);
835 av_dlog(s, "i=%d, st->codec->codec_type:%d, asf->dar %d:%d sar=%d:%d\n",
836 i, st->codec->codec_type, asf->dar[i].num, asf->dar[i].den,
837 st->sample_aspect_ratio.num, st->sample_aspect_ratio.den);
839 // copy and convert language codes to the frontend
840 if (asf->streams[i].stream_language_index < 128) {
841 const char *rfc1766 = asf->stream_languages[asf->streams[i].stream_language_index];
842 if (rfc1766 && strlen(rfc1766) > 1) {
843 const char primary_tag[3] = { rfc1766[0], rfc1766[1], '\0' }; // ignore country code if any
844 const char *iso6392 = av_convert_lang_to(primary_tag,
845 AV_LANG_ISO639_2_BIBL);
847 av_dict_set(&st->metadata, "language", iso6392, 0);
853 ff_metadata_conv(&s->metadata, NULL, ff_asf_metadata_conv);
858 #define DO_2BITS(bits, var, defval) \
859 switch (bits & 3) { \
861 var = avio_rl32(pb); \
865 var = avio_rl16(pb); \
878 * Load a single ASF packet into the demuxer.
879 * @param s demux context
880 * @param pb context to read data from
881 * @return 0 on success, <0 on error
883 static int asf_get_packet(AVFormatContext *s, AVIOContext *pb)
885 ASFContext *asf = s->priv_data;
886 uint32_t packet_length, padsize;
890 // if we do not know packet size, allow skipping up to 32 kB
892 if (asf->no_resync_search)
894 else if (s->packet_size > 0)
895 off = (avio_tell(pb) - s->data_offset) % s->packet_size + 3;
902 if (c == 0x82 && !d && !e)
907 /* This code allows handling of -EAGAIN at packet boundaries (i.e.
908 * if the packet sync code above triggers -EAGAIN). This does not
909 * imply complete -EAGAIN handling support at random positions in
911 if (pb->error == AVERROR(EAGAIN))
912 return AVERROR(EAGAIN);
914 av_log(s, AV_LOG_ERROR,
915 "ff asf bad header %x at:%"PRId64"\n", c, avio_tell(pb));
917 if ((c & 0x8f) == 0x82) {
920 av_log(s, AV_LOG_ERROR, "ff asf bad non zero\n");
921 return AVERROR_INVALIDDATA;
926 } else if(!url_feof(pb)) {
927 avio_seek(pb, -1, SEEK_CUR); // FIXME
930 asf->packet_flags = c;
931 asf->packet_property = d;
933 DO_2BITS(asf->packet_flags >> 5, packet_length, s->packet_size);
934 DO_2BITS(asf->packet_flags >> 1, padsize, 0); // sequence ignored
935 DO_2BITS(asf->packet_flags >> 3, padsize, 0); // padding length
937 // the following checks prevent overflows and infinite loops
938 if (!packet_length || packet_length >= (1U << 29)) {
939 av_log(s, AV_LOG_ERROR,
940 "invalid packet_length %d at:%"PRId64"\n",
941 packet_length, avio_tell(pb));
942 return AVERROR_INVALIDDATA;
944 if (padsize >= packet_length) {
945 av_log(s, AV_LOG_ERROR,
946 "invalid padsize %d at:%"PRId64"\n", padsize, avio_tell(pb));
947 return AVERROR_INVALIDDATA;
950 asf->packet_timestamp = avio_rl32(pb);
951 avio_rl16(pb); /* duration */
952 // rsize has at least 11 bytes which have to be present
954 if (asf->packet_flags & 0x01) {
955 asf->packet_segsizetype = avio_r8(pb);
957 asf->packet_segments = asf->packet_segsizetype & 0x3f;
959 asf->packet_segments = 1;
960 asf->packet_segsizetype = 0x80;
962 if (rsize > packet_length - padsize) {
963 asf->packet_size_left = 0;
964 av_log(s, AV_LOG_ERROR,
965 "invalid packet header length %d for pktlen %d-%d at %"PRId64"\n",
966 rsize, packet_length, padsize, avio_tell(pb));
967 return AVERROR_INVALIDDATA;
969 asf->packet_size_left = packet_length - padsize - rsize;
970 if (packet_length < asf->hdr.min_pktsize)
971 padsize += asf->hdr.min_pktsize - packet_length;
972 asf->packet_padsize = padsize;
973 av_dlog(s, "packet: size=%d padsize=%d left=%d\n",
974 s->packet_size, asf->packet_padsize, asf->packet_size_left);
980 * @return <0 if error
982 static int asf_read_frame_header(AVFormatContext *s, AVIOContext *pb)
984 ASFContext *asf = s->priv_data;
987 int num = avio_r8(pb);
989 int64_t ts0, ts1 av_unused;
991 asf->packet_segments--;
992 asf->packet_key_frame = num >> 7;
993 asf->stream_index = asf->asfid2avid[num & 0x7f];
994 asfst = &asf->streams[num & 0x7f];
995 // sequence should be ignored!
996 DO_2BITS(asf->packet_property >> 4, asf->packet_seq, 0);
997 DO_2BITS(asf->packet_property >> 2, asf->packet_frag_offset, 0);
998 DO_2BITS(asf->packet_property, asf->packet_replic_size, 0);
999 av_dlog(asf, "key:%d stream:%d seq:%d offset:%d replic_size:%d\n",
1000 asf->packet_key_frame, asf->stream_index, asf->packet_seq,
1001 asf->packet_frag_offset, asf->packet_replic_size);
1002 if (rsize+(int64_t)asf->packet_replic_size > asf->packet_size_left) {
1003 av_log(s, AV_LOG_ERROR, "packet_replic_size %d is invalid\n", asf->packet_replic_size);
1004 return AVERROR_INVALIDDATA;
1006 if (asf->packet_replic_size >= 8) {
1007 int64_t end = avio_tell(pb) + asf->packet_replic_size;
1009 asfst->packet_obj_size = avio_rl32(pb);
1010 if (asfst->packet_obj_size >= (1 << 24) || asfst->packet_obj_size <= 0) {
1011 av_log(s, AV_LOG_ERROR, "packet_obj_size invalid\n");
1012 asfst->packet_obj_size = 0;
1013 return AVERROR_INVALIDDATA;
1015 asf->packet_frag_timestamp = avio_rl32(pb); // timestamp
1017 for (i = 0; i < asfst->payload_ext_ct; i++) {
1018 ASFPayload *p = &asfst->payload[i];
1022 size = avio_rl16(pb);
1023 payend = avio_tell(pb) + size;
1025 av_log(s, AV_LOG_ERROR, "too long payload\n");
1030 // duration = avio_rl16(pb);
1033 aspect.num = avio_r8(pb);
1034 aspect.den = avio_r8(pb);
1035 if (aspect.num > 0 && aspect.den > 0 && asf->stream_index >= 0) {
1036 s->streams[asf->stream_index]->sample_aspect_ratio = aspect;
1041 ts0 = avio_rl64(pb);
1042 ts1 = avio_rl64(pb);
1043 if (ts0!= -1) asf->packet_frag_timestamp = ts0/10000;
1044 else asf->packet_frag_timestamp = AV_NOPTS_VALUE;
1054 avio_seek(pb, payend, SEEK_SET);
1057 avio_seek(pb, end, SEEK_SET);
1058 rsize += asf->packet_replic_size; // FIXME - check validity
1059 } else if (asf->packet_replic_size == 1) {
1060 // multipacket - frag_offset is beginning timestamp
1061 asf->packet_time_start = asf->packet_frag_offset;
1062 asf->packet_frag_offset = 0;
1063 asf->packet_frag_timestamp = asf->packet_timestamp;
1065 asf->packet_time_delta = avio_r8(pb);
1067 } else if (asf->packet_replic_size != 0) {
1068 av_log(s, AV_LOG_ERROR, "unexpected packet_replic_size of %d\n",
1069 asf->packet_replic_size);
1070 return AVERROR_INVALIDDATA;
1072 if (asf->packet_flags & 0x01) {
1073 DO_2BITS(asf->packet_segsizetype >> 6, asf->packet_frag_size, 0); // 0 is illegal
1074 if (rsize > asf->packet_size_left) {
1075 av_log(s, AV_LOG_ERROR, "packet_replic_size is invalid\n");
1076 return AVERROR_INVALIDDATA;
1077 } else if (asf->packet_frag_size > asf->packet_size_left - rsize) {
1078 if (asf->packet_frag_size > asf->packet_size_left - rsize + asf->packet_padsize) {
1079 av_log(s, AV_LOG_ERROR, "packet_frag_size is invalid (%d-%d)\n",
1080 asf->packet_size_left, rsize);
1081 return AVERROR_INVALIDDATA;
1083 int diff = asf->packet_frag_size - (asf->packet_size_left - rsize);
1084 asf->packet_size_left += diff;
1085 asf->packet_padsize -= diff;
1089 asf->packet_frag_size = asf->packet_size_left - rsize;
1091 if (asf->packet_replic_size == 1) {
1092 asf->packet_multi_size = asf->packet_frag_size;
1093 if (asf->packet_multi_size > asf->packet_size_left)
1094 return AVERROR_INVALIDDATA;
1096 asf->packet_size_left -= rsize;
1102 * Parse data from individual ASF packets (which were previously loaded
1103 * with asf_get_packet()).
1104 * @param s demux context
1105 * @param pb context to read data from
1106 * @param pkt pointer to store packet data into
1107 * @return 0 if data was stored in pkt, <0 on error or 1 if more ASF
1108 * packets need to be loaded (through asf_get_packet())
1110 static int asf_parse_packet(AVFormatContext *s, AVIOContext *pb, AVPacket *pkt)
1112 ASFContext *asf = s->priv_data;
1113 ASFStream *asf_st = 0;
1119 if (asf->packet_size_left < FRAME_HEADER_SIZE ||
1120 asf->packet_segments < 1) {
1121 int ret = asf->packet_size_left + asf->packet_padsize;
1127 asf->packet_pos = avio_tell(pb);
1128 if (asf->data_object_size != (uint64_t)-1 &&
1129 (asf->packet_pos - asf->data_object_offset >= asf->data_object_size))
1130 return AVERROR_EOF; /* Do not exceed the size of the data object */
1133 if (asf->packet_time_start == 0) {
1134 if (asf_read_frame_header(s, pb) < 0) {
1135 asf->packet_segments = 0;
1138 if (asf->stream_index < 0 ||
1139 s->streams[asf->stream_index]->discard >= AVDISCARD_ALL ||
1140 (!asf->packet_key_frame &&
1141 (s->streams[asf->stream_index]->discard >= AVDISCARD_NONKEY || asf->streams[s->streams[asf->stream_index]->id].skip_to_key))) {
1142 asf->packet_time_start = 0;
1143 /* unhandled packet (should not happen) */
1144 avio_skip(pb, asf->packet_frag_size);
1145 asf->packet_size_left -= asf->packet_frag_size;
1146 if (asf->stream_index < 0)
1147 av_log(s, AV_LOG_ERROR, "ff asf skip %d (unknown stream)\n",
1148 asf->packet_frag_size);
1151 asf->asf_st = &asf->streams[s->streams[asf->stream_index]->id];
1152 asf->asf_st->skip_to_key = 0;
1154 asf_st = asf->asf_st;
1157 if (asf->packet_replic_size == 1) {
1158 // frag_offset is here used as the beginning timestamp
1159 asf->packet_frag_timestamp = asf->packet_time_start;
1160 asf->packet_time_start += asf->packet_time_delta;
1161 asf_st->packet_obj_size = asf->packet_frag_size = avio_r8(pb);
1162 asf->packet_size_left--;
1163 asf->packet_multi_size--;
1164 if (asf->packet_multi_size < asf_st->packet_obj_size) {
1165 asf->packet_time_start = 0;
1166 avio_skip(pb, asf->packet_multi_size);
1167 asf->packet_size_left -= asf->packet_multi_size;
1170 asf->packet_multi_size -= asf_st->packet_obj_size;
1173 if (asf_st->pkt.size != asf_st->packet_obj_size ||
1174 // FIXME is this condition sufficient?
1175 asf_st->frag_offset + asf->packet_frag_size > asf_st->pkt.size) {
1176 if (asf_st->pkt.data) {
1177 av_log(s, AV_LOG_INFO,
1178 "freeing incomplete packet size %d, new %d\n",
1179 asf_st->pkt.size, asf_st->packet_obj_size);
1180 asf_st->frag_offset = 0;
1181 av_free_packet(&asf_st->pkt);
1184 av_new_packet(&asf_st->pkt, asf_st->packet_obj_size);
1185 asf_st->seq = asf->packet_seq;
1186 asf_st->pkt.dts = asf->packet_frag_timestamp - asf->hdr.preroll;
1187 asf_st->pkt.stream_index = asf->stream_index;
1188 asf_st->pkt.pos = asf_st->packet_pos = asf->packet_pos;
1190 if (asf_st->pkt.data && asf_st->palette_changed) {
1192 pal = av_packet_new_side_data(&asf_st->pkt, AV_PKT_DATA_PALETTE,
1195 av_log(s, AV_LOG_ERROR, "Cannot append palette to packet\n");
1197 memcpy(pal, asf_st->palette, AVPALETTE_SIZE);
1198 asf_st->palette_changed = 0;
1201 av_dlog(asf, "new packet: stream:%d key:%d packet_key:%d audio:%d size:%d\n",
1202 asf->stream_index, asf->packet_key_frame,
1203 asf_st->pkt.flags & AV_PKT_FLAG_KEY,
1204 s->streams[asf->stream_index]->codec->codec_type == AVMEDIA_TYPE_AUDIO,
1205 asf_st->packet_obj_size);
1206 if (s->streams[asf->stream_index]->codec->codec_type == AVMEDIA_TYPE_AUDIO)
1207 asf->packet_key_frame = 1;
1208 if (asf->packet_key_frame)
1209 asf_st->pkt.flags |= AV_PKT_FLAG_KEY;
1213 av_dlog(asf, "READ PACKET s:%d os:%d o:%d,%d l:%d DATA:%p\n",
1214 s->packet_size, asf_st->pkt.size, asf->packet_frag_offset,
1215 asf_st->frag_offset, asf->packet_frag_size, asf_st->pkt.data);
1216 asf->packet_size_left -= asf->packet_frag_size;
1217 if (asf->packet_size_left < 0)
1220 if (asf->packet_frag_offset >= asf_st->pkt.size ||
1221 asf->packet_frag_size > asf_st->pkt.size - asf->packet_frag_offset) {
1222 av_log(s, AV_LOG_ERROR,
1223 "packet fragment position invalid %u,%u not in %u\n",
1224 asf->packet_frag_offset, asf->packet_frag_size,
1229 ret = avio_read(pb, asf_st->pkt.data + asf->packet_frag_offset,
1230 asf->packet_frag_size);
1231 if (ret != asf->packet_frag_size) {
1232 if (ret < 0 || asf->packet_frag_offset + ret == 0)
1233 return ret < 0 ? ret : AVERROR_EOF;
1235 if (asf_st->ds_span > 1) {
1236 // scrambling, we can either drop it completely or fill the remainder
1237 // TODO: should we fill the whole packet instead of just the current
1239 memset(asf_st->pkt.data + asf->packet_frag_offset + ret, 0,
1240 asf->packet_frag_size - ret);
1241 ret = asf->packet_frag_size;
1243 // no scrambling, so we can return partial packets
1244 av_shrink_packet(&asf_st->pkt, asf->packet_frag_offset + ret);
1247 if (s->key && s->keylen == 20)
1248 ff_asfcrypt_dec(s->key, asf_st->pkt.data + asf->packet_frag_offset,
1250 asf_st->frag_offset += ret;
1251 /* test if whole packet is read */
1252 if (asf_st->frag_offset == asf_st->pkt.size) {
1253 // workaround for macroshit radio DVR-MS files
1254 if (s->streams[asf->stream_index]->codec->codec_id == AV_CODEC_ID_MPEG2VIDEO &&
1255 asf_st->pkt.size > 100) {
1257 for (i = 0; i < asf_st->pkt.size && !asf_st->pkt.data[i]; i++)
1259 if (i == asf_st->pkt.size) {
1260 av_log(s, AV_LOG_DEBUG, "discarding ms fart\n");
1261 asf_st->frag_offset = 0;
1262 av_free_packet(&asf_st->pkt);
1268 if (asf_st->ds_span > 1) {
1269 if (asf_st->pkt.size != asf_st->ds_packet_size * asf_st->ds_span) {
1270 av_log(s, AV_LOG_ERROR,
1271 "pkt.size != ds_packet_size * ds_span (%d %d %d)\n",
1272 asf_st->pkt.size, asf_st->ds_packet_size,
1275 /* packet descrambling */
1276 AVBufferRef *buf = av_buffer_alloc(asf_st->pkt.size +
1277 FF_INPUT_BUFFER_PADDING_SIZE);
1279 uint8_t *newdata = buf->data;
1281 memset(newdata + asf_st->pkt.size, 0,
1282 FF_INPUT_BUFFER_PADDING_SIZE);
1283 while (offset < asf_st->pkt.size) {
1284 int off = offset / asf_st->ds_chunk_size;
1285 int row = off / asf_st->ds_span;
1286 int col = off % asf_st->ds_span;
1287 int idx = row + col * asf_st->ds_packet_size / asf_st->ds_chunk_size;
1288 assert(offset + asf_st->ds_chunk_size <= asf_st->pkt.size);
1289 assert(idx + 1 <= asf_st->pkt.size / asf_st->ds_chunk_size);
1290 memcpy(newdata + offset,
1291 asf_st->pkt.data + idx * asf_st->ds_chunk_size,
1292 asf_st->ds_chunk_size);
1293 offset += asf_st->ds_chunk_size;
1295 av_buffer_unref(&asf_st->pkt.buf);
1296 asf_st->pkt.buf = buf;
1297 asf_st->pkt.data = buf->data;
1301 asf_st->frag_offset = 0;
1303 #if FF_API_DESTRUCT_PACKET
1304 FF_DISABLE_DEPRECATION_WARNINGS
1305 asf_st->pkt.destruct = NULL;
1306 FF_ENABLE_DEPRECATION_WARNINGS
1308 asf_st->pkt.buf = 0;
1309 asf_st->pkt.size = 0;
1310 asf_st->pkt.data = 0;
1311 asf_st->pkt.side_data_elems = 0;
1312 asf_st->pkt.side_data = NULL;
1313 break; // packet completed
1319 static int asf_read_packet(AVFormatContext *s, AVPacket *pkt)
1321 ASFContext *asf = s->priv_data;
1326 /* parse cached packets, if any */
1327 if ((ret = asf_parse_packet(s, s->pb, pkt)) <= 0)
1329 if ((ret = asf_get_packet(s, s->pb)) < 0)
1330 assert(asf->packet_size_left < FRAME_HEADER_SIZE ||
1331 asf->packet_segments < 1);
1332 asf->packet_time_start = 0;
1336 // Added to support seeking after packets have been read
1337 // If information is not reset, read_packet fails due to
1338 // leftover information from previous reads
1339 static void asf_reset_header(AVFormatContext *s)
1341 ASFContext *asf = s->priv_data;
1345 asf->packet_size_left = 0;
1346 asf->packet_segments = 0;
1347 asf->packet_flags = 0;
1348 asf->packet_property = 0;
1349 asf->packet_timestamp = 0;
1350 asf->packet_segsizetype = 0;
1351 asf->packet_segments = 0;
1352 asf->packet_seq = 0;
1353 asf->packet_replic_size = 0;
1354 asf->packet_key_frame = 0;
1355 asf->packet_padsize = 0;
1356 asf->packet_frag_offset = 0;
1357 asf->packet_frag_size = 0;
1358 asf->packet_frag_timestamp = 0;
1359 asf->packet_multi_size = 0;
1360 asf->packet_time_delta = 0;
1361 asf->packet_time_start = 0;
1363 for (i = 0; i < 128; i++) {
1364 asf_st = &asf->streams[i];
1365 av_free_packet(&asf_st->pkt);
1366 asf_st->packet_obj_size = 0;
1367 asf_st->frag_offset = 0;
1373 static void skip_to_key(AVFormatContext *s)
1375 ASFContext *asf = s->priv_data;
1378 for (i = 0; i < 128; i++) {
1379 int j = asf->asfid2avid[i];
1380 ASFStream *asf_st = &asf->streams[i];
1381 if (j < 0 || s->streams[j]->codec->codec_type != AVMEDIA_TYPE_VIDEO)
1384 asf_st->skip_to_key = 1;
1388 static int asf_read_close(AVFormatContext *s)
1390 asf_reset_header(s);
1395 static int64_t asf_read_pts(AVFormatContext *s, int stream_index,
1396 int64_t *ppos, int64_t pos_limit)
1398 ASFContext *asf = s->priv_data;
1399 AVPacket pkt1, *pkt = &pkt1;
1402 int64_t pos = *ppos;
1404 int64_t start_pos[ASF_MAX_STREAMS];
1406 for (i = 0; i < s->nb_streams; i++)
1409 if (s->packet_size > 0)
1410 pos = (pos + s->packet_size - 1 - s->data_offset) /
1411 s->packet_size * s->packet_size +
1414 if (avio_seek(s->pb, pos, SEEK_SET) < 0)
1415 return AV_NOPTS_VALUE;
1417 ff_read_frame_flush(s);
1418 asf_reset_header(s);
1420 if (av_read_frame(s, pkt) < 0) {
1421 av_log(s, AV_LOG_INFO, "asf_read_pts failed\n");
1422 return AV_NOPTS_VALUE;
1427 av_free_packet(pkt);
1428 if (pkt->flags & AV_PKT_FLAG_KEY) {
1429 i = pkt->stream_index;
1431 asf_st = &asf->streams[s->streams[i]->id];
1433 // assert((asf_st->packet_pos - s->data_offset) % s->packet_size == 0);
1434 pos = asf_st->packet_pos;
1436 av_add_index_entry(s->streams[i], pos, pts, pkt->size,
1437 pos - start_pos[i] + 1, AVINDEX_KEYFRAME);
1438 start_pos[i] = asf_st->packet_pos + 1;
1440 if (pkt->stream_index == stream_index)
1449 static void asf_build_simple_index(AVFormatContext *s, int stream_index)
1452 ASFContext *asf = s->priv_data;
1453 int64_t current_pos = avio_tell(s->pb);
1455 if(avio_seek(s->pb, asf->data_object_offset + asf->data_object_size, SEEK_SET) < 0) {
1456 asf->index_read= -1;
1460 ff_get_guid(s->pb, &g);
1462 /* the data object can be followed by other top-level objects,
1463 * skip them until the simple index object is reached */
1464 while (ff_guidcmp(&g, &ff_asf_simple_index_header)) {
1465 int64_t gsize = avio_rl64(s->pb);
1466 if (gsize < 24 || url_feof(s->pb)) {
1467 avio_seek(s->pb, current_pos, SEEK_SET);
1468 asf->index_read= -1;
1471 avio_skip(s->pb, gsize - 24);
1472 ff_get_guid(s->pb, &g);
1476 int64_t itime, last_pos = -1;
1479 int64_t av_unused gsize = avio_rl64(s->pb);
1480 ff_get_guid(s->pb, &g);
1481 itime = avio_rl64(s->pb);
1482 pct = avio_rl32(s->pb);
1483 ict = avio_rl32(s->pb);
1484 av_log(s, AV_LOG_DEBUG,
1485 "itime:0x%"PRIx64", pct:%d, ict:%d\n", itime, pct, ict);
1487 for (i = 0; i < ict; i++) {
1488 int pktnum = avio_rl32(s->pb);
1489 int pktct = avio_rl16(s->pb);
1490 int64_t pos = s->data_offset + s->packet_size * (int64_t)pktnum;
1491 int64_t index_pts = FFMAX(av_rescale(itime, i, 10000) - asf->hdr.preroll, 0);
1493 if (pos != last_pos) {
1494 av_log(s, AV_LOG_DEBUG, "pktnum:%d, pktct:%d pts: %"PRId64"\n",
1495 pktnum, pktct, index_pts);
1496 av_add_index_entry(s->streams[stream_index], pos, index_pts,
1497 s->packet_size, 0, AVINDEX_KEYFRAME);
1501 asf->index_read = ict > 1;
1503 avio_seek(s->pb, current_pos, SEEK_SET);
1506 static int asf_read_seek(AVFormatContext *s, int stream_index,
1507 int64_t pts, int flags)
1509 ASFContext *asf = s->priv_data;
1510 AVStream *st = s->streams[stream_index];
1512 if (s->packet_size <= 0)
1515 /* Try using the protocol's read_seek if available */
1517 int ret = avio_seek_time(s->pb, stream_index, pts, flags);
1519 asf_reset_header(s);
1520 if (ret != AVERROR(ENOSYS))
1524 if (!asf->index_read)
1525 asf_build_simple_index(s, stream_index);
1527 if ((asf->index_read > 0 && st->index_entries)) {
1528 int index = av_index_search_timestamp(st, pts, flags);
1530 /* find the position */
1531 uint64_t pos = st->index_entries[index].pos;
1534 av_log(s, AV_LOG_DEBUG, "SEEKTO: %"PRId64"\n", pos);
1535 if(avio_seek(s->pb, pos, SEEK_SET) < 0)
1537 asf_reset_header(s);
1542 /* no index or seeking by index failed */
1543 if (ff_seek_frame_binary(s, stream_index, pts, flags) < 0)
1545 asf_reset_header(s);
1550 AVInputFormat ff_asf_demuxer = {
1552 .long_name = NULL_IF_CONFIG_SMALL("ASF (Advanced / Active Streaming Format)"),
1553 .priv_data_size = sizeof(ASFContext),
1554 .read_probe = asf_probe,
1555 .read_header = asf_read_header,
1556 .read_packet = asf_read_packet,
1557 .read_close = asf_read_close,
1558 .read_seek = asf_read_seek,
1559 .read_timestamp = asf_read_pts,
1560 .flags = AVFMT_NOBINSEARCH | AVFMT_NOGENSEARCH,
1561 .priv_class = &asf_class,