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/mathematics.h"
29 #include "libavutil/opt.h"
31 #include "avio_internal.h"
32 #include "avlanguage.h"
41 int asfid2avid[128]; ///< conversion table from asf ID 2 AVStream ID
42 ASFStream streams[128]; ///< it's max number and it's not that big
43 uint32_t stream_bitrates[128]; ///< max number of streams, bitrate for each (for streaming)
45 char stream_languages[128][6]; ///< max number of streams, language for each (RFC1766, e.g. en-US)
46 /* non streamed additonnal info */
49 /* only for reading */
50 uint64_t data_offset; ///< beginning of the first data packet
51 uint64_t data_object_offset; ///< data object offset (excl. GUID & size)
52 uint64_t data_object_size; ///< size of the data object
60 int packet_segsizetype;
63 int packet_replic_size;
66 unsigned int packet_frag_offset;
67 unsigned int packet_frag_size;
68 int64_t packet_frag_timestamp;
69 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 asf_st = av_mallocz(sizeof(ASFStream));
371 return AVERROR(ENOMEM);
372 st->priv_data = asf_st;
373 start_time = asf->hdr.preroll;
375 asf_st->stream_language_index = 128; // invalid stream index means no language info
377 if (!(asf->hdr.flags & 0x01)) { // if we aren't streaming...
378 int64_t fsize = avio_size(pb);
379 if (fsize <= 0 || (int64_t)asf->hdr.file_size <= 0 || FFABS(fsize - (int64_t)asf->hdr.file_size) < 10000)
380 st->duration = asf->hdr.play_time /
381 (10000000 / 1000) - start_time;
385 test_for_ext_stream_audio = 0;
386 if (!ff_guidcmp(&g, &ff_asf_audio_stream)) {
387 type = AVMEDIA_TYPE_AUDIO;
388 } else if (!ff_guidcmp(&g, &ff_asf_video_stream)) {
389 type = AVMEDIA_TYPE_VIDEO;
390 } else if (!ff_guidcmp(&g, &ff_asf_jfif_media)) {
391 type = AVMEDIA_TYPE_VIDEO;
392 st->codec->codec_id = AV_CODEC_ID_MJPEG;
393 } else if (!ff_guidcmp(&g, &ff_asf_command_stream)) {
394 type = AVMEDIA_TYPE_DATA;
395 } else if (!ff_guidcmp(&g, &ff_asf_ext_stream_embed_stream_header)) {
396 test_for_ext_stream_audio = 1;
397 type = AVMEDIA_TYPE_UNKNOWN;
402 avio_skip(pb, 8); /* total_size */
403 type_specific_size = avio_rl32(pb);
405 st->id = avio_rl16(pb) & 0x7f; /* stream id */
406 // mapping of asf ID to AV stream ID;
407 asf->asfid2avid[st->id] = s->nb_streams - 1;
411 if (test_for_ext_stream_audio) {
413 if (!ff_guidcmp(&g, &ff_asf_ext_stream_audio_stream)) {
414 type = AVMEDIA_TYPE_AUDIO;
425 st->codec->codec_type = type;
426 if (type == AVMEDIA_TYPE_AUDIO) {
427 int ret = ff_get_wav_header(pb, st->codec, type_specific_size);
430 if (is_dvr_ms_audio) {
431 // codec_id and codec_tag are unreliable in dvr_ms
432 // files. Set them later by probing stream.
433 st->request_probe = 1;
434 st->codec->codec_tag = 0;
436 if (st->codec->codec_id == AV_CODEC_ID_AAC)
437 st->need_parsing = AVSTREAM_PARSE_NONE;
439 st->need_parsing = AVSTREAM_PARSE_FULL;
440 /* We have to init the frame size at some point .... */
441 pos2 = avio_tell(pb);
442 if (size >= (pos2 + 8 - pos1 + 24)) {
443 asf_st->ds_span = avio_r8(pb);
444 asf_st->ds_packet_size = avio_rl16(pb);
445 asf_st->ds_chunk_size = avio_rl16(pb);
446 avio_rl16(pb); // ds_data_size
447 avio_r8(pb); // ds_silence_data
449 if (asf_st->ds_span > 1) {
450 if (!asf_st->ds_chunk_size ||
451 (asf_st->ds_packet_size / asf_st->ds_chunk_size <= 1) ||
452 asf_st->ds_packet_size % asf_st->ds_chunk_size)
453 asf_st->ds_span = 0; // disable descrambling
455 } else if (type == AVMEDIA_TYPE_VIDEO &&
456 size - (avio_tell(pb) - pos1 + 24) >= 51) {
460 avio_rl16(pb); /* size */
461 sizeX = avio_rl32(pb); /* size */
462 st->codec->width = avio_rl32(pb);
463 st->codec->height = avio_rl32(pb);
464 /* not available for asf */
465 avio_rl16(pb); /* panes */
466 st->codec->bits_per_coded_sample = avio_rl16(pb); /* depth */
467 tag1 = avio_rl32(pb);
470 st->codec->extradata_size = ffio_limit(pb, sizeX - 40);
471 st->codec->extradata = av_mallocz(st->codec->extradata_size +
472 FF_INPUT_BUFFER_PADDING_SIZE);
473 avio_read(pb, st->codec->extradata, st->codec->extradata_size);
476 /* Extract palette from extradata if bpp <= 8 */
477 /* This code assumes that extradata contains only palette */
478 /* This is true for all paletted codecs implemented in libavcodec */
479 if (st->codec->extradata_size && (st->codec->bits_per_coded_sample <= 8)) {
482 for (i = 0; i < FFMIN(st->codec->extradata_size, AVPALETTE_SIZE) / 4; i++)
483 asf_st->palette[i] = av_bswap32(((uint32_t *)st->codec->extradata)[i]);
485 memcpy(asf_st->palette, st->codec->extradata,
486 FFMIN(st->codec->extradata_size, AVPALETTE_SIZE));
488 asf_st->palette_changed = 1;
491 st->codec->codec_tag = tag1;
492 st->codec->codec_id = ff_codec_get_id(ff_codec_bmp_tags, tag1);
493 if (tag1 == MKTAG('D', 'V', 'R', ' ')) {
494 st->need_parsing = AVSTREAM_PARSE_FULL;
495 /* issue658 contains wrong w/h and MS even puts a fake seq header
496 * with wrong w/h in extradata while a correct one is in the stream.
497 * maximum lameness */
499 st->codec->height = 0;
500 av_freep(&st->codec->extradata);
501 st->codec->extradata_size = 0;
503 if (st->codec->codec_id == AV_CODEC_ID_H264)
504 st->need_parsing = AVSTREAM_PARSE_FULL_ONCE;
506 pos2 = avio_tell(pb);
507 avio_skip(pb, size - (pos2 - pos1 + 24));
512 static int asf_read_ext_stream_properties(AVFormatContext *s, int64_t size)
514 ASFContext *asf = s->priv_data;
515 AVIOContext *pb = s->pb;
517 int ext_len, payload_ext_ct, stream_ct, i;
518 uint32_t leak_rate, stream_num;
519 unsigned int stream_languageid_index;
521 avio_rl64(pb); // starttime
522 avio_rl64(pb); // endtime
523 leak_rate = avio_rl32(pb); // leak-datarate
524 avio_rl32(pb); // bucket-datasize
525 avio_rl32(pb); // init-bucket-fullness
526 avio_rl32(pb); // alt-leak-datarate
527 avio_rl32(pb); // alt-bucket-datasize
528 avio_rl32(pb); // alt-init-bucket-fullness
529 avio_rl32(pb); // max-object-size
530 avio_rl32(pb); // flags (reliable,seekable,no_cleanpoints?,resend-live-cleanpoints, rest of bits reserved)
531 stream_num = avio_rl16(pb); // stream-num
533 stream_languageid_index = avio_rl16(pb); // stream-language-id-index
534 if (stream_num < 128)
535 asf->streams[stream_num].stream_language_index = stream_languageid_index;
537 avio_rl64(pb); // avg frametime in 100ns units
538 stream_ct = avio_rl16(pb); // stream-name-count
539 payload_ext_ct = avio_rl16(pb); // payload-extension-system-count
541 if (stream_num < 128) {
542 asf->stream_bitrates[stream_num] = leak_rate;
543 asf->streams[stream_num].payload_ext_ct = 0;
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 size = avio_rl16(pb);
556 ext_len = avio_rl32(pb);
557 avio_skip(pb, ext_len);
558 if (stream_num < 128 && i < FF_ARRAY_ELEMS(asf->streams[stream_num].payload)) {
559 ASFPayload *p = &asf->streams[stream_num].payload[i];
562 av_log(s, AV_LOG_DEBUG, "Payload extension %x %d\n", g[0], p->size );
563 asf->streams[stream_num].payload_ext_ct ++;
570 static int asf_read_content_desc(AVFormatContext *s, int64_t size)
572 AVIOContext *pb = s->pb;
573 int len1, len2, len3, len4, len5;
575 len1 = avio_rl16(pb);
576 len2 = avio_rl16(pb);
577 len3 = avio_rl16(pb);
578 len4 = avio_rl16(pb);
579 len5 = avio_rl16(pb);
580 get_tag(s, "title", 0, len1, 32);
581 get_tag(s, "author", 0, len2, 32);
582 get_tag(s, "copyright", 0, len3, 32);
583 get_tag(s, "comment", 0, len4, 32);
589 static int asf_read_ext_content_desc(AVFormatContext *s, int64_t size)
591 AVIOContext *pb = s->pb;
592 ASFContext *asf = s->priv_data;
593 int desc_count, i, ret;
595 desc_count = avio_rl16(pb);
596 for (i = 0; i < desc_count; i++) {
597 int name_len, value_type, value_len;
600 name_len = avio_rl16(pb);
601 if (name_len % 2) // must be even, broken lavf versions wrote len-1
603 if ((ret = avio_get_str16le(pb, name_len, name, sizeof(name))) < name_len)
604 avio_skip(pb, name_len - ret);
605 value_type = avio_rl16(pb);
606 value_len = avio_rl16(pb);
607 if (!value_type && value_len % 2)
609 /* My sample has that stream set to 0 maybe that mean the container.
610 * ASF stream count starts at 1. I am using 0 to the container value
611 * since it's unused. */
612 if (!strcmp(name, "AspectRatioX"))
613 asf->dar[0].num = get_value(s->pb, value_type, 32);
614 else if (!strcmp(name, "AspectRatioY"))
615 asf->dar[0].den = get_value(s->pb, value_type, 32);
617 get_tag(s, name, value_type, value_len, 32);
623 static int asf_read_language_list(AVFormatContext *s, int64_t size)
625 AVIOContext *pb = s->pb;
626 ASFContext *asf = s->priv_data;
628 int stream_count = avio_rl16(pb);
629 for (j = 0; j < stream_count; j++) {
631 unsigned int lang_len = avio_r8(pb);
632 if ((ret = avio_get_str16le(pb, lang_len, lang,
633 sizeof(lang))) < lang_len)
634 avio_skip(pb, lang_len - ret);
636 av_strlcpy(asf->stream_languages[j], lang,
637 sizeof(*asf->stream_languages));
643 static int asf_read_metadata(AVFormatContext *s, int64_t size)
645 AVIOContext *pb = s->pb;
646 ASFContext *asf = s->priv_data;
647 int n, stream_num, name_len, value_len;
651 for (i = 0; i < n; i++) {
655 avio_rl16(pb); // lang_list_index
656 stream_num = avio_rl16(pb);
657 name_len = avio_rl16(pb);
658 value_type = avio_rl16(pb); /* value_type */
659 value_len = avio_rl32(pb);
661 if ((ret = avio_get_str16le(pb, name_len, name, sizeof(name))) < name_len)
662 avio_skip(pb, name_len - ret);
663 av_dlog(s, "%d stream %d name_len %2d type %d len %4d <%s>\n",
664 i, stream_num, name_len, value_type, value_len, name);
666 if (!strcmp(name, "AspectRatioX")){
667 int aspect_x = get_value(s->pb, value_type, 16);
669 asf->dar[stream_num].num = aspect_x;
670 } else if(!strcmp(name, "AspectRatioY")){
671 int aspect_y = get_value(s->pb, value_type, 16);
673 asf->dar[stream_num].den = aspect_y;
675 get_tag(s, name, value_type, value_len, 16);
682 static int asf_read_marker(AVFormatContext *s, int64_t size)
684 AVIOContext *pb = s->pb;
685 int i, count, name_len, ret;
688 avio_rl64(pb); // reserved 16 bytes
689 avio_rl64(pb); // ...
690 count = avio_rl32(pb); // markers count
691 avio_rl16(pb); // reserved 2 bytes
692 name_len = avio_rl16(pb); // name length
693 for (i = 0; i < name_len; i++)
694 avio_r8(pb); // skip the name
696 for (i = 0; i < count; i++) {
700 avio_rl64(pb); // offset, 8 bytes
701 pres_time = avio_rl64(pb); // presentation time
702 avio_rl16(pb); // entry length
703 avio_rl32(pb); // send time
704 avio_rl32(pb); // flags
705 name_len = avio_rl32(pb); // name length
706 if ((ret = avio_get_str16le(pb, name_len * 2, name,
707 sizeof(name))) < name_len)
708 avio_skip(pb, name_len - ret);
709 avpriv_new_chapter(s, i, (AVRational) { 1, 10000000 }, pres_time,
710 AV_NOPTS_VALUE, name);
716 static int asf_read_header(AVFormatContext *s)
718 ASFContext *asf = s->priv_data;
720 AVIOContext *pb = s->pb;
725 if (ff_guidcmp(&g, &ff_asf_header))
726 return AVERROR_INVALIDDATA;
731 memset(&asf->asfid2avid, -1, sizeof(asf->asfid2avid));
733 uint64_t gpos = avio_tell(pb);
735 gsize = avio_rl64(pb);
737 if (!ff_guidcmp(&g, &ff_asf_data_header)) {
738 asf->data_object_offset = avio_tell(pb);
739 /* If not streaming, gsize is not unlimited (how?),
740 * and there is enough space in the file.. */
741 if (!(asf->hdr.flags & 0x01) && gsize >= 100)
742 asf->data_object_size = gsize - 24;
744 asf->data_object_size = (uint64_t)-1;
748 return AVERROR_INVALIDDATA;
749 if (!ff_guidcmp(&g, &ff_asf_file_header)) {
750 int ret = asf_read_file_properties(s, gsize);
753 } else if (!ff_guidcmp(&g, &ff_asf_stream_header)) {
754 asf_read_stream_properties(s, gsize);
755 } else if (!ff_guidcmp(&g, &ff_asf_comment_header)) {
756 asf_read_content_desc(s, gsize);
757 } else if (!ff_guidcmp(&g, &ff_asf_language_guid)) {
758 asf_read_language_list(s, gsize);
759 } else if (!ff_guidcmp(&g, &ff_asf_extended_content_header)) {
760 asf_read_ext_content_desc(s, gsize);
761 } else if (!ff_guidcmp(&g, &ff_asf_metadata_header)) {
762 asf_read_metadata(s, gsize);
763 } else if (!ff_guidcmp(&g, &ff_asf_metadata_library_header)) {
764 asf_read_metadata(s, gsize);
765 } else if (!ff_guidcmp(&g, &ff_asf_ext_stream_header)) {
766 asf_read_ext_stream_properties(s, gsize);
768 // there could be a optional stream properties object to follow
769 // if so the next iteration will pick it up
771 } else if (!ff_guidcmp(&g, &ff_asf_head1_guid)) {
775 } else if (!ff_guidcmp(&g, &ff_asf_marker_header)) {
776 asf_read_marker(s, gsize);
777 } else if (url_feof(pb)) {
781 if (!ff_guidcmp(&g, &ff_asf_content_encryption)) {
784 av_log(s, AV_LOG_WARNING,
785 "DRM protected stream detected, decoding will likely fail!\n");
787 av_log(s, AV_LOG_DEBUG, "Secret data:\n");
788 av_get_packet(pb, &pkt, len); av_hex_dump_log(s, AV_LOG_DEBUG, pkt.data, pkt.size); av_free_packet(&pkt);
790 get_tag(s, "ASF_Protection_Type", -1, len, 32);
792 get_tag(s, "ASF_Key_ID", -1, len, 32);
794 get_tag(s, "ASF_License_URL", -1, len, 32);
795 } else if (!ff_guidcmp(&g, &ff_asf_ext_content_encryption)) {
796 av_log(s, AV_LOG_WARNING,
797 "Ext DRM protected stream detected, decoding will likely fail!\n");
798 av_dict_set(&s->metadata, "encryption", "ASF Extended Content Encryption", 0);
799 } else if (!ff_guidcmp(&g, &ff_asf_digital_signature)) {
800 av_log(s, AV_LOG_INFO, "Digital signature detected!\n");
804 if (avio_tell(pb) != gpos + gsize)
805 av_log(s, AV_LOG_DEBUG,
806 "gpos mismatch our pos=%"PRIu64", end=%"PRId64"\n",
807 avio_tell(pb) - gpos, gsize);
808 avio_seek(pb, gpos + gsize, SEEK_SET);
816 asf->data_offset = avio_tell(pb);
817 asf->packet_size_left = 0;
819 for (i = 0; i < 128; i++) {
820 int stream_num = asf->asfid2avid[i];
821 if (stream_num >= 0) {
822 AVStream *st = s->streams[stream_num];
823 if (!st->codec->bit_rate)
824 st->codec->bit_rate = asf->stream_bitrates[i];
825 if (asf->dar[i].num > 0 && asf->dar[i].den > 0) {
826 av_reduce(&st->sample_aspect_ratio.num,
827 &st->sample_aspect_ratio.den,
828 asf->dar[i].num, asf->dar[i].den, INT_MAX);
829 } else if ((asf->dar[0].num > 0) && (asf->dar[0].den > 0) &&
830 // Use ASF container value if the stream doesn't set AR.
831 (st->codec->codec_type == AVMEDIA_TYPE_VIDEO))
832 av_reduce(&st->sample_aspect_ratio.num,
833 &st->sample_aspect_ratio.den,
834 asf->dar[0].num, asf->dar[0].den, INT_MAX);
836 av_dlog(s, "i=%d, st->codec->codec_type:%d, asf->dar %d:%d sar=%d:%d\n",
837 i, st->codec->codec_type, asf->dar[i].num, asf->dar[i].den,
838 st->sample_aspect_ratio.num, st->sample_aspect_ratio.den);
840 // copy and convert language codes to the frontend
841 if (asf->streams[i].stream_language_index < 128) {
842 const char *rfc1766 = asf->stream_languages[asf->streams[i].stream_language_index];
843 if (rfc1766 && strlen(rfc1766) > 1) {
844 const char primary_tag[3] = { rfc1766[0], rfc1766[1], '\0' }; // ignore country code if any
845 const char *iso6392 = av_convert_lang_to(primary_tag,
846 AV_LANG_ISO639_2_BIBL);
848 av_dict_set(&st->metadata, "language", iso6392, 0);
854 ff_metadata_conv(&s->metadata, NULL, ff_asf_metadata_conv);
859 #define DO_2BITS(bits, var, defval) \
860 switch (bits & 3) { \
862 var = avio_rl32(pb); \
866 var = avio_rl16(pb); \
879 * Load a single ASF packet into the demuxer.
880 * @param s demux context
881 * @param pb context to read data from
882 * @return 0 on success, <0 on error
884 static int asf_get_packet(AVFormatContext *s, AVIOContext *pb)
886 ASFContext *asf = s->priv_data;
887 uint32_t packet_length, padsize;
891 // if we do not know packet size, allow skipping up to 32 kB
893 if (asf->no_resync_search)
895 else if (s->packet_size > 0)
896 off = (avio_tell(pb) - s->data_offset) % s->packet_size + 3;
903 if (c == 0x82 && !d && !e)
908 /* This code allows handling of -EAGAIN at packet boundaries (i.e.
909 * if the packet sync code above triggers -EAGAIN). This does not
910 * imply complete -EAGAIN handling support at random positions in
912 if (pb->error == AVERROR(EAGAIN))
913 return AVERROR(EAGAIN);
915 av_log(s, AV_LOG_ERROR,
916 "ff asf bad header %x at:%"PRId64"\n", c, avio_tell(pb));
918 if ((c & 0x8f) == 0x82) {
921 av_log(s, AV_LOG_ERROR, "ff asf bad non zero\n");
922 return AVERROR_INVALIDDATA;
927 } else if(!url_feof(pb)) {
928 avio_seek(pb, -1, SEEK_CUR); // FIXME
931 asf->packet_flags = c;
932 asf->packet_property = d;
934 DO_2BITS(asf->packet_flags >> 5, packet_length, s->packet_size);
935 DO_2BITS(asf->packet_flags >> 1, padsize, 0); // sequence ignored
936 DO_2BITS(asf->packet_flags >> 3, padsize, 0); // padding length
938 // the following checks prevent overflows and infinite loops
939 if (!packet_length || packet_length >= (1U << 29)) {
940 av_log(s, AV_LOG_ERROR,
941 "invalid packet_length %d at:%"PRId64"\n",
942 packet_length, avio_tell(pb));
943 return AVERROR_INVALIDDATA;
945 if (padsize >= packet_length) {
946 av_log(s, AV_LOG_ERROR,
947 "invalid padsize %d at:%"PRId64"\n", padsize, avio_tell(pb));
948 return AVERROR_INVALIDDATA;
951 asf->packet_timestamp = avio_rl32(pb);
952 avio_rl16(pb); /* duration */
953 // rsize has at least 11 bytes which have to be present
955 if (asf->packet_flags & 0x01) {
956 asf->packet_segsizetype = avio_r8(pb);
958 asf->packet_segments = asf->packet_segsizetype & 0x3f;
960 asf->packet_segments = 1;
961 asf->packet_segsizetype = 0x80;
963 if (rsize > packet_length - padsize) {
964 asf->packet_size_left = 0;
965 av_log(s, AV_LOG_ERROR,
966 "invalid packet header length %d for pktlen %d-%d at %"PRId64"\n",
967 rsize, packet_length, padsize, avio_tell(pb));
968 return AVERROR_INVALIDDATA;
970 asf->packet_size_left = packet_length - padsize - rsize;
971 if (packet_length < asf->hdr.min_pktsize)
972 padsize += asf->hdr.min_pktsize - packet_length;
973 asf->packet_padsize = padsize;
974 av_dlog(s, "packet: size=%d padsize=%d left=%d\n",
975 s->packet_size, asf->packet_padsize, asf->packet_size_left);
981 * @return <0 if error
983 static int asf_read_frame_header(AVFormatContext *s, AVIOContext *pb)
985 ASFContext *asf = s->priv_data;
988 int num = avio_r8(pb);
990 int64_t ts0, ts1 av_unused;
992 asf->packet_segments--;
993 asf->packet_key_frame = num >> 7;
994 asf->stream_index = asf->asfid2avid[num & 0x7f];
995 asfst = &asf->streams[num & 0x7f];
996 // sequence should be ignored!
997 DO_2BITS(asf->packet_property >> 4, asf->packet_seq, 0);
998 DO_2BITS(asf->packet_property >> 2, asf->packet_frag_offset, 0);
999 DO_2BITS(asf->packet_property, asf->packet_replic_size, 0);
1000 av_dlog(asf, "key:%d stream:%d seq:%d offset:%d replic_size:%d\n",
1001 asf->packet_key_frame, asf->stream_index, asf->packet_seq,
1002 asf->packet_frag_offset, asf->packet_replic_size);
1003 if (rsize+(int64_t)asf->packet_replic_size > asf->packet_size_left) {
1004 av_log(s, AV_LOG_ERROR, "packet_replic_size %d is invalid\n", asf->packet_replic_size);
1005 return AVERROR_INVALIDDATA;
1007 if (asf->packet_replic_size >= 8) {
1008 int64_t end = avio_tell(pb) + asf->packet_replic_size;
1010 asf->packet_obj_size = avio_rl32(pb);
1011 if (asf->packet_obj_size >= (1 << 24) || asf->packet_obj_size <= 0) {
1012 av_log(s, AV_LOG_ERROR, "packet_obj_size invalid\n");
1013 asf->packet_obj_size = 0;
1014 return AVERROR_INVALIDDATA;
1016 asf->packet_frag_timestamp = avio_rl32(pb); // timestamp
1018 for (i = 0; i < asfst->payload_ext_ct; i++) {
1019 ASFPayload *p = &asfst->payload[i];
1023 size = avio_rl16(pb);
1024 payend = avio_tell(pb) + size;
1026 av_log(s, AV_LOG_ERROR, "too long payload\n");
1031 // duration = avio_rl16(pb);
1034 aspect.num = avio_r8(pb);
1035 aspect.den = avio_r8(pb);
1036 if (aspect.num > 0 && aspect.den > 0 && asf->stream_index >= 0) {
1037 s->streams[asf->stream_index]->sample_aspect_ratio = aspect;
1042 ts0 = avio_rl64(pb);
1043 ts1 = avio_rl64(pb);
1044 if (ts0!= -1) asf->packet_frag_timestamp = ts0/10000;
1045 else asf->packet_frag_timestamp = AV_NOPTS_VALUE;
1055 avio_seek(pb, payend, SEEK_SET);
1058 avio_seek(pb, end, SEEK_SET);
1059 rsize += asf->packet_replic_size; // FIXME - check validity
1060 } else if (asf->packet_replic_size == 1) {
1061 // multipacket - frag_offset is beginning timestamp
1062 asf->packet_time_start = asf->packet_frag_offset;
1063 asf->packet_frag_offset = 0;
1064 asf->packet_frag_timestamp = asf->packet_timestamp;
1066 asf->packet_time_delta = avio_r8(pb);
1068 } else if (asf->packet_replic_size != 0) {
1069 av_log(s, AV_LOG_ERROR, "unexpected packet_replic_size of %d\n",
1070 asf->packet_replic_size);
1071 return AVERROR_INVALIDDATA;
1073 if (asf->packet_flags & 0x01) {
1074 DO_2BITS(asf->packet_segsizetype >> 6, asf->packet_frag_size, 0); // 0 is illegal
1075 if (rsize > asf->packet_size_left) {
1076 av_log(s, AV_LOG_ERROR, "packet_replic_size is invalid\n");
1077 return AVERROR_INVALIDDATA;
1078 } else if (asf->packet_frag_size > asf->packet_size_left - rsize) {
1079 if (asf->packet_frag_size > asf->packet_size_left - rsize + asf->packet_padsize) {
1080 av_log(s, AV_LOG_ERROR, "packet_frag_size is invalid (%d-%d)\n",
1081 asf->packet_size_left, rsize);
1082 return AVERROR_INVALIDDATA;
1084 int diff = asf->packet_frag_size - (asf->packet_size_left - rsize);
1085 asf->packet_size_left += diff;
1086 asf->packet_padsize -= diff;
1090 asf->packet_frag_size = asf->packet_size_left - rsize;
1092 if (asf->packet_replic_size == 1) {
1093 asf->packet_multi_size = asf->packet_frag_size;
1094 if (asf->packet_multi_size > asf->packet_size_left)
1095 return AVERROR_INVALIDDATA;
1097 asf->packet_size_left -= rsize;
1103 * Parse data from individual ASF packets (which were previously loaded
1104 * with asf_get_packet()).
1105 * @param s demux context
1106 * @param pb context to read data from
1107 * @param pkt pointer to store packet data into
1108 * @return 0 if data was stored in pkt, <0 on error or 1 if more ASF
1109 * packets need to be loaded (through asf_get_packet())
1111 static int asf_parse_packet(AVFormatContext *s, AVIOContext *pb, AVPacket *pkt)
1113 ASFContext *asf = s->priv_data;
1114 ASFStream *asf_st = 0;
1120 if (asf->packet_size_left < FRAME_HEADER_SIZE ||
1121 asf->packet_segments < 1) {
1122 int ret = asf->packet_size_left + asf->packet_padsize;
1128 asf->packet_pos = avio_tell(pb);
1129 if (asf->data_object_size != (uint64_t)-1 &&
1130 (asf->packet_pos - asf->data_object_offset >= asf->data_object_size))
1131 return AVERROR_EOF; /* Do not exceed the size of the data object */
1134 if (asf->packet_time_start == 0) {
1135 if (asf_read_frame_header(s, pb) < 0) {
1136 asf->packet_segments = 0;
1139 if (asf->stream_index < 0 ||
1140 s->streams[asf->stream_index]->discard >= AVDISCARD_ALL ||
1141 (!asf->packet_key_frame &&
1142 s->streams[asf->stream_index]->discard >= AVDISCARD_NONKEY)) {
1143 asf->packet_time_start = 0;
1144 /* unhandled packet (should not happen) */
1145 avio_skip(pb, asf->packet_frag_size);
1146 asf->packet_size_left -= asf->packet_frag_size;
1147 if (asf->stream_index < 0)
1148 av_log(s, AV_LOG_ERROR, "ff asf skip %d (unknown stream)\n",
1149 asf->packet_frag_size);
1152 asf->asf_st = s->streams[asf->stream_index]->priv_data;
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->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->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->packet_obj_size;
1172 if (asf_st->frag_offset + asf->packet_frag_size <= asf_st->pkt.size &&
1173 asf_st->frag_offset + asf->packet_frag_size > asf->packet_obj_size) {
1174 av_log(s, AV_LOG_INFO, "ignoring invalid packet_obj_size (%d %d %d %d)\n",
1175 asf_st->frag_offset, asf->packet_frag_size,
1176 asf->packet_obj_size, asf_st->pkt.size);
1177 asf->packet_obj_size = asf_st->pkt.size;
1180 if (asf_st->pkt.size != asf->packet_obj_size ||
1181 // FIXME is this condition sufficient?
1182 asf_st->frag_offset + asf->packet_frag_size > asf_st->pkt.size) {
1183 if (asf_st->pkt.data) {
1184 av_log(s, AV_LOG_INFO,
1185 "freeing incomplete packet size %d, new %d\n",
1186 asf_st->pkt.size, asf->packet_obj_size);
1187 asf_st->frag_offset = 0;
1188 av_free_packet(&asf_st->pkt);
1191 av_new_packet(&asf_st->pkt, asf->packet_obj_size);
1192 asf_st->seq = asf->packet_seq;
1193 asf_st->pkt.dts = asf->packet_frag_timestamp - asf->hdr.preroll;
1194 asf_st->pkt.stream_index = asf->stream_index;
1195 asf_st->pkt.pos = asf_st->packet_pos = asf->packet_pos;
1197 if (asf_st->pkt.data && asf_st->palette_changed) {
1199 pal = av_packet_new_side_data(&asf_st->pkt, AV_PKT_DATA_PALETTE,
1202 av_log(s, AV_LOG_ERROR, "Cannot append palette to packet\n");
1204 memcpy(pal, asf_st->palette, AVPALETTE_SIZE);
1205 asf_st->palette_changed = 0;
1208 av_dlog(asf, "new packet: stream:%d key:%d packet_key:%d audio:%d size:%d\n",
1209 asf->stream_index, asf->packet_key_frame,
1210 asf_st->pkt.flags & AV_PKT_FLAG_KEY,
1211 s->streams[asf->stream_index]->codec->codec_type == AVMEDIA_TYPE_AUDIO,
1212 asf->packet_obj_size);
1213 if (s->streams[asf->stream_index]->codec->codec_type == AVMEDIA_TYPE_AUDIO)
1214 asf->packet_key_frame = 1;
1215 if (asf->packet_key_frame)
1216 asf_st->pkt.flags |= AV_PKT_FLAG_KEY;
1220 av_dlog(asf, "READ PACKET s:%d os:%d o:%d,%d l:%d DATA:%p\n",
1221 s->packet_size, asf_st->pkt.size, asf->packet_frag_offset,
1222 asf_st->frag_offset, asf->packet_frag_size, asf_st->pkt.data);
1223 asf->packet_size_left -= asf->packet_frag_size;
1224 if (asf->packet_size_left < 0)
1227 if (asf->packet_frag_offset >= asf_st->pkt.size ||
1228 asf->packet_frag_size > asf_st->pkt.size - asf->packet_frag_offset) {
1229 av_log(s, AV_LOG_ERROR,
1230 "packet fragment position invalid %u,%u not in %u\n",
1231 asf->packet_frag_offset, asf->packet_frag_size,
1236 ret = avio_read(pb, asf_st->pkt.data + asf->packet_frag_offset,
1237 asf->packet_frag_size);
1238 if (ret != asf->packet_frag_size) {
1239 if (ret < 0 || asf->packet_frag_offset + ret == 0)
1240 return ret < 0 ? ret : AVERROR_EOF;
1242 if (asf_st->ds_span > 1) {
1243 // scrambling, we can either drop it completely or fill the remainder
1244 // TODO: should we fill the whole packet instead of just the current
1246 memset(asf_st->pkt.data + asf->packet_frag_offset + ret, 0,
1247 asf->packet_frag_size - ret);
1248 ret = asf->packet_frag_size;
1250 // no scrambling, so we can return partial packets
1251 av_shrink_packet(&asf_st->pkt, asf->packet_frag_offset + ret);
1254 if (s->key && s->keylen == 20)
1255 ff_asfcrypt_dec(s->key, asf_st->pkt.data + asf->packet_frag_offset,
1257 asf_st->frag_offset += ret;
1258 /* test if whole packet is read */
1259 if (asf_st->frag_offset == asf_st->pkt.size) {
1260 // workaround for macroshit radio DVR-MS files
1261 if (s->streams[asf->stream_index]->codec->codec_id == AV_CODEC_ID_MPEG2VIDEO &&
1262 asf_st->pkt.size > 100) {
1264 for (i = 0; i < asf_st->pkt.size && !asf_st->pkt.data[i]; i++)
1266 if (i == asf_st->pkt.size) {
1267 av_log(s, AV_LOG_DEBUG, "discarding ms fart\n");
1268 asf_st->frag_offset = 0;
1269 av_free_packet(&asf_st->pkt);
1275 if (asf_st->ds_span > 1) {
1276 if (asf_st->pkt.size != asf_st->ds_packet_size * asf_st->ds_span) {
1277 av_log(s, AV_LOG_ERROR,
1278 "pkt.size != ds_packet_size * ds_span (%d %d %d)\n",
1279 asf_st->pkt.size, asf_st->ds_packet_size,
1282 /* packet descrambling */
1283 AVBufferRef *buf = av_buffer_alloc(asf_st->pkt.size +
1284 FF_INPUT_BUFFER_PADDING_SIZE);
1286 uint8_t *newdata = buf->data;
1288 memset(newdata + asf_st->pkt.size, 0,
1289 FF_INPUT_BUFFER_PADDING_SIZE);
1290 while (offset < asf_st->pkt.size) {
1291 int off = offset / asf_st->ds_chunk_size;
1292 int row = off / asf_st->ds_span;
1293 int col = off % asf_st->ds_span;
1294 int idx = row + col * asf_st->ds_packet_size / asf_st->ds_chunk_size;
1295 assert(offset + asf_st->ds_chunk_size <= asf_st->pkt.size);
1296 assert(idx + 1 <= asf_st->pkt.size / asf_st->ds_chunk_size);
1297 memcpy(newdata + offset,
1298 asf_st->pkt.data + idx * asf_st->ds_chunk_size,
1299 asf_st->ds_chunk_size);
1300 offset += asf_st->ds_chunk_size;
1302 av_buffer_unref(&asf_st->pkt.buf);
1303 asf_st->pkt.buf = buf;
1304 asf_st->pkt.data = buf->data;
1308 asf_st->frag_offset = 0;
1310 #if FF_API_DESTRUCT_PACKET
1311 asf_st->pkt.destruct = NULL;
1313 asf_st->pkt.buf = 0;
1314 asf_st->pkt.size = 0;
1315 asf_st->pkt.data = 0;
1316 asf_st->pkt.side_data_elems = 0;
1317 asf_st->pkt.side_data = NULL;
1318 break; // packet completed
1324 static int asf_read_packet(AVFormatContext *s, AVPacket *pkt)
1326 ASFContext *asf = s->priv_data;
1331 /* parse cached packets, if any */
1332 if ((ret = asf_parse_packet(s, s->pb, pkt)) <= 0)
1334 if ((ret = asf_get_packet(s, s->pb)) < 0)
1335 assert(asf->packet_size_left < FRAME_HEADER_SIZE ||
1336 asf->packet_segments < 1);
1337 asf->packet_time_start = 0;
1341 // Added to support seeking after packets have been read
1342 // If information is not reset, read_packet fails due to
1343 // leftover information from previous reads
1344 static void asf_reset_header(AVFormatContext *s)
1346 ASFContext *asf = s->priv_data;
1350 asf->packet_size_left = 0;
1351 asf->packet_segments = 0;
1352 asf->packet_flags = 0;
1353 asf->packet_property = 0;
1354 asf->packet_timestamp = 0;
1355 asf->packet_segsizetype = 0;
1356 asf->packet_segments = 0;
1357 asf->packet_seq = 0;
1358 asf->packet_replic_size = 0;
1359 asf->packet_key_frame = 0;
1360 asf->packet_padsize = 0;
1361 asf->packet_frag_offset = 0;
1362 asf->packet_frag_size = 0;
1363 asf->packet_frag_timestamp = 0;
1364 asf->packet_multi_size = 0;
1365 asf->packet_obj_size = 0;
1366 asf->packet_time_delta = 0;
1367 asf->packet_time_start = 0;
1369 for (i = 0; i < s->nb_streams; i++) {
1370 asf_st = s->streams[i]->priv_data;
1373 av_free_packet(&asf_st->pkt);
1374 asf_st->frag_offset = 0;
1380 static int asf_read_close(AVFormatContext *s)
1382 asf_reset_header(s);
1387 static int64_t asf_read_pts(AVFormatContext *s, int stream_index,
1388 int64_t *ppos, int64_t pos_limit)
1390 AVPacket pkt1, *pkt = &pkt1;
1393 int64_t pos = *ppos;
1395 int64_t start_pos[ASF_MAX_STREAMS];
1397 for (i = 0; i < s->nb_streams; i++)
1400 if (s->packet_size > 0)
1401 pos = (pos + s->packet_size - 1 - s->data_offset) /
1402 s->packet_size * s->packet_size +
1405 if (avio_seek(s->pb, pos, SEEK_SET) < 0)
1406 return AV_NOPTS_VALUE;
1408 asf_reset_header(s);
1410 if (av_read_frame(s, pkt) < 0) {
1411 av_log(s, AV_LOG_INFO, "asf_read_pts failed\n");
1412 return AV_NOPTS_VALUE;
1417 av_free_packet(pkt);
1418 if (pkt->flags & AV_PKT_FLAG_KEY) {
1419 i = pkt->stream_index;
1421 asf_st = s->streams[i]->priv_data;
1424 // assert((asf_st->packet_pos - s->data_offset) % s->packet_size == 0);
1425 pos = asf_st->packet_pos;
1427 av_add_index_entry(s->streams[i], pos, pts, pkt->size,
1428 pos - start_pos[i] + 1, AVINDEX_KEYFRAME);
1429 start_pos[i] = asf_st->packet_pos + 1;
1431 if (pkt->stream_index == stream_index)
1440 static void asf_build_simple_index(AVFormatContext *s, int stream_index)
1443 ASFContext *asf = s->priv_data;
1444 int64_t current_pos = avio_tell(s->pb);
1446 if(avio_seek(s->pb, asf->data_object_offset + asf->data_object_size, SEEK_SET) < 0) {
1447 asf->index_read= -1;
1451 ff_get_guid(s->pb, &g);
1453 /* the data object can be followed by other top-level objects,
1454 * skip them until the simple index object is reached */
1455 while (ff_guidcmp(&g, &ff_asf_simple_index_header)) {
1456 int64_t gsize = avio_rl64(s->pb);
1457 if (gsize < 24 || url_feof(s->pb)) {
1458 avio_seek(s->pb, current_pos, SEEK_SET);
1459 asf->index_read= -1;
1462 avio_skip(s->pb, gsize - 24);
1463 ff_get_guid(s->pb, &g);
1467 int64_t itime, last_pos = -1;
1470 int64_t av_unused gsize = avio_rl64(s->pb);
1471 ff_get_guid(s->pb, &g);
1472 itime = avio_rl64(s->pb);
1473 pct = avio_rl32(s->pb);
1474 ict = avio_rl32(s->pb);
1475 av_log(s, AV_LOG_DEBUG,
1476 "itime:0x%"PRIx64", pct:%d, ict:%d\n", itime, pct, ict);
1478 for (i = 0; i < ict; i++) {
1479 int pktnum = avio_rl32(s->pb);
1480 int pktct = avio_rl16(s->pb);
1481 int64_t pos = s->data_offset + s->packet_size * (int64_t)pktnum;
1482 int64_t index_pts = FFMAX(av_rescale(itime, i, 10000) - asf->hdr.preroll, 0);
1484 if (pos != last_pos) {
1485 av_log(s, AV_LOG_DEBUG, "pktnum:%d, pktct:%d pts: %"PRId64"\n",
1486 pktnum, pktct, index_pts);
1487 av_add_index_entry(s->streams[stream_index], pos, index_pts,
1488 s->packet_size, 0, AVINDEX_KEYFRAME);
1492 asf->index_read = ict > 1;
1494 avio_seek(s->pb, current_pos, SEEK_SET);
1497 static int asf_read_seek(AVFormatContext *s, int stream_index,
1498 int64_t pts, int flags)
1500 ASFContext *asf = s->priv_data;
1501 AVStream *st = s->streams[stream_index];
1503 if (s->packet_size <= 0)
1506 /* Try using the protocol's read_seek if available */
1508 int ret = avio_seek_time(s->pb, stream_index, pts, flags);
1510 asf_reset_header(s);
1511 if (ret != AVERROR(ENOSYS))
1515 if (!asf->index_read)
1516 asf_build_simple_index(s, stream_index);
1518 if ((asf->index_read > 0 && st->index_entries)) {
1519 int index = av_index_search_timestamp(st, pts, flags);
1521 /* find the position */
1522 uint64_t pos = st->index_entries[index].pos;
1525 av_log(s, AV_LOG_DEBUG, "SEEKTO: %"PRId64"\n", pos);
1526 if(avio_seek(s->pb, pos, SEEK_SET) < 0)
1528 asf_reset_header(s);
1532 /* no index or seeking by index failed */
1533 if (ff_seek_frame_binary(s, stream_index, pts, flags) < 0)
1535 asf_reset_header(s);
1539 AVInputFormat ff_asf_demuxer = {
1541 .long_name = NULL_IF_CONFIG_SMALL("ASF (Advanced / Active Streaming Format)"),
1542 .priv_data_size = sizeof(ASFContext),
1543 .read_probe = asf_probe,
1544 .read_header = asf_read_header,
1545 .read_packet = asf_read_packet,
1546 .read_close = asf_read_close,
1547 .read_seek = asf_read_seek,
1548 .read_timestamp = asf_read_pts,
1549 .flags = AVFMT_NOBINSEARCH | AVFMT_NOGENSEARCH,
1550 .priv_class = &asf_class,