2 * ASF compatible demuxer
3 * Copyright (c) 2000, 2001 Fabrice Bellard
5 * This file is part of FFmpeg.
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
24 #include "libavutil/attributes.h"
25 #include "libavutil/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"
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;
73 int packet_time_delta;
74 int packet_time_start;
79 ASFStream *asf_st; ///< currently decoded stream
84 static const AVOption options[] = {
85 { "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 },
89 static const AVClass asf_class = {
90 .class_name = "asf demuxer",
91 .item_name = av_default_item_name,
93 .version = LIBAVUTIL_VERSION_INT,
99 #define ASF_MAX_STREAMS 127
100 #define FRAME_HEADER_SIZE 16
101 // Fix Me! FRAME_HEADER_SIZE may be different. (17 is known to be too large)
104 static const ff_asf_guid stream_bitrate_guid = { /* (http://get.to/sdp) */
105 0xce, 0x75, 0xf8, 0x7b, 0x8d, 0x46, 0xd1, 0x11, 0x8d, 0x82, 0x00, 0x60, 0x97, 0xc9, 0xa2, 0xb2
108 #define PRINT_IF_GUID(g, cmp) \
109 if (!ff_guidcmp(g, &cmp)) \
110 av_dlog(NULL, "(GUID: %s) ", # cmp)
112 static void print_guid(ff_asf_guid *g)
115 PRINT_IF_GUID(g, ff_asf_header);
116 else PRINT_IF_GUID(g, ff_asf_file_header);
117 else PRINT_IF_GUID(g, ff_asf_stream_header);
118 else PRINT_IF_GUID(g, ff_asf_audio_stream);
119 else PRINT_IF_GUID(g, ff_asf_audio_conceal_none);
120 else PRINT_IF_GUID(g, ff_asf_video_stream);
121 else PRINT_IF_GUID(g, ff_asf_video_conceal_none);
122 else PRINT_IF_GUID(g, ff_asf_command_stream);
123 else PRINT_IF_GUID(g, ff_asf_comment_header);
124 else PRINT_IF_GUID(g, ff_asf_codec_comment_header);
125 else PRINT_IF_GUID(g, ff_asf_codec_comment1_header);
126 else PRINT_IF_GUID(g, ff_asf_data_header);
127 else PRINT_IF_GUID(g, ff_asf_simple_index_header);
128 else PRINT_IF_GUID(g, ff_asf_head1_guid);
129 else PRINT_IF_GUID(g, ff_asf_head2_guid);
130 else PRINT_IF_GUID(g, ff_asf_my_guid);
131 else PRINT_IF_GUID(g, ff_asf_ext_stream_header);
132 else PRINT_IF_GUID(g, ff_asf_extended_content_header);
133 else PRINT_IF_GUID(g, ff_asf_ext_stream_embed_stream_header);
134 else PRINT_IF_GUID(g, ff_asf_ext_stream_audio_stream);
135 else PRINT_IF_GUID(g, ff_asf_metadata_header);
136 else PRINT_IF_GUID(g, ff_asf_metadata_library_header);
137 else PRINT_IF_GUID(g, ff_asf_marker_header);
138 else PRINT_IF_GUID(g, stream_bitrate_guid);
139 else PRINT_IF_GUID(g, ff_asf_language_guid);
141 av_dlog(NULL, "(GUID: unknown) ");
142 for (i = 0; i < 16; i++)
143 av_dlog(NULL, " 0x%02x,", (*g)[i]);
144 av_dlog(NULL, "}\n");
148 #define print_guid(g)
151 static int asf_probe(AVProbeData *pd)
153 /* check file header */
154 if (!ff_guidcmp(pd->buf, &ff_asf_header))
155 return AVPROBE_SCORE_MAX;
160 /* size of type 2 (BOOL) is 32bit for "Extended Content Description Object"
161 * but 16 bit for "Metadata Object" and "Metadata Library Object" */
162 static int get_value(AVIOContext *pb, int type, int type2_size)
166 return (type2_size == 32) ? avio_rl32(pb) : avio_rl16(pb);
168 return avio_rl32(pb);
170 return avio_rl64(pb);
172 return avio_rl16(pb);
178 /* MSDN claims that this should be "compatible with the ID3 frame, APIC",
179 * but in reality this is only loosely similar */
180 static int asf_read_picture(AVFormatContext *s, int len)
182 AVPacket pkt = { 0 };
183 const CodecMime *mime = ff_id3v2_mime_tags;
184 enum AVCodecID id = AV_CODEC_ID_NONE;
186 uint8_t *desc = NULL;
188 int ret, type, picsize, desc_len;
190 /* type + picsize + mime + desc */
191 if (len < 1 + 4 + 2 + 2) {
192 av_log(s, AV_LOG_ERROR, "Invalid attached picture size: %d.\n", len);
193 return AVERROR_INVALIDDATA;
197 type = avio_r8(s->pb);
199 if (type >= FF_ARRAY_ELEMS(ff_id3v2_picture_types) || type < 0) {
200 av_log(s, AV_LOG_WARNING, "Unknown attached picture type: %d.\n", type);
204 /* picture data size */
205 picsize = avio_rl32(s->pb);
208 /* picture MIME type */
209 len -= avio_get_str16le(s->pb, len, mimetype, sizeof(mimetype));
210 while (mime->id != AV_CODEC_ID_NONE) {
211 if (!strncmp(mime->str, mimetype, sizeof(mimetype))) {
217 if (id == AV_CODEC_ID_NONE) {
218 av_log(s, AV_LOG_ERROR, "Unknown attached picture mimetype: %s.\n",
223 if (picsize >= len) {
224 av_log(s, AV_LOG_ERROR, "Invalid attached picture data size: %d >= %d.\n",
226 return AVERROR_INVALIDDATA;
229 /* picture description */
230 desc_len = (len - picsize) * 2 + 1;
231 desc = av_malloc(desc_len);
233 return AVERROR(ENOMEM);
234 len -= avio_get_str16le(s->pb, len - picsize, desc, desc_len);
236 ret = av_get_packet(s->pb, &pkt, picsize);
240 st = avformat_new_stream(s, NULL);
242 ret = AVERROR(ENOMEM);
245 st->disposition |= AV_DISPOSITION_ATTACHED_PIC;
246 st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
247 st->codec->codec_id = id;
248 st->attached_pic = pkt;
249 st->attached_pic.stream_index = st->index;
250 st->attached_pic.flags |= AV_PKT_FLAG_KEY;
253 av_dict_set(&st->metadata, "title", desc, AV_DICT_DONT_STRDUP_VAL);
257 av_dict_set(&st->metadata, "comment", ff_id3v2_picture_types[type], 0);
263 av_free_packet(&pkt);
267 static void get_id3_tag(AVFormatContext *s, int len)
269 ID3v2ExtraMeta *id3v2_extra_meta = NULL;
271 ff_id3v2_read(s, ID3v2_DEFAULT_MAGIC, &id3v2_extra_meta, len);
272 if (id3v2_extra_meta)
273 ff_id3v2_parse_apic(s, &id3v2_extra_meta);
274 ff_id3v2_free_extra_meta(&id3v2_extra_meta);
277 static void get_tag(AVFormatContext *s, const char *key, int type, int len, int type2_size)
280 int64_t off = avio_tell(s->pb);
283 if ((unsigned)len >= (UINT_MAX - LEN) / 2)
286 value = av_malloc(2 * len + LEN);
290 if (type == 0) { // UTF16-LE
291 avio_get_str16le(s->pb, len, value, 2 * len + 1);
292 } else if (type == -1) { // ASCII
293 avio_read(s->pb, value, len);
295 } else if (type == 1) { // byte array
296 if (!strcmp(key, "WM/Picture")) { // handle cover art
297 asf_read_picture(s, len);
298 } else if (!strcmp(key, "ID3")) { // handle ID3 tag
301 av_log(s, AV_LOG_VERBOSE, "Unsupported byte array in tag %s.\n", key);
304 } else if (type > 1 && type <= 5) { // boolean or DWORD or QWORD or WORD
305 uint64_t num = get_value(s->pb, type, type2_size);
306 snprintf(value, LEN, "%"PRIu64, num);
307 } else if (type == 6) { // (don't) handle GUID
308 av_log(s, AV_LOG_DEBUG, "Unsupported GUID value in tag %s.\n", key);
311 av_log(s, AV_LOG_DEBUG,
312 "Unsupported value type %d in tag %s.\n", type, key);
316 av_dict_set(&s->metadata, key, value, 0);
320 avio_seek(s->pb, off + len, SEEK_SET);
323 static int asf_read_file_properties(AVFormatContext *s, int64_t size)
325 ASFContext *asf = s->priv_data;
326 AVIOContext *pb = s->pb;
328 ff_get_guid(pb, &asf->hdr.guid);
329 asf->hdr.file_size = avio_rl64(pb);
330 asf->hdr.create_time = avio_rl64(pb);
331 avio_rl64(pb); /* number of packets */
332 asf->hdr.play_time = avio_rl64(pb);
333 asf->hdr.send_time = avio_rl64(pb);
334 asf->hdr.preroll = avio_rl32(pb);
335 asf->hdr.ignore = avio_rl32(pb);
336 asf->hdr.flags = avio_rl32(pb);
337 asf->hdr.min_pktsize = avio_rl32(pb);
338 asf->hdr.max_pktsize = avio_rl32(pb);
339 if (asf->hdr.min_pktsize >= (1U << 29))
340 return AVERROR_INVALIDDATA;
341 asf->hdr.max_bitrate = avio_rl32(pb);
342 s->packet_size = asf->hdr.max_pktsize;
347 static int asf_read_stream_properties(AVFormatContext *s, int64_t size)
349 ASFContext *asf = s->priv_data;
350 AVIOContext *pb = s->pb;
354 enum AVMediaType type;
355 int type_specific_size, sizeX;
357 int64_t pos1, pos2, start_time;
358 int test_for_ext_stream_audio, is_dvr_ms_audio = 0;
360 if (s->nb_streams == ASF_MAX_STREAMS) {
361 av_log(s, AV_LOG_ERROR, "too many streams\n");
362 return AVERROR(EINVAL);
365 pos1 = avio_tell(pb);
367 st = avformat_new_stream(s, NULL);
369 return AVERROR(ENOMEM);
370 avpriv_set_pts_info(st, 32, 1, 1000); /* 32 bit pts in ms */
371 start_time = asf->hdr.preroll;
373 if (!(asf->hdr.flags & 0x01)) { // if we aren't streaming...
374 int64_t fsize = avio_size(pb);
375 if (fsize <= 0 || (int64_t)asf->hdr.file_size <= 0 || FFABS(fsize - (int64_t)asf->hdr.file_size) < 10000)
376 st->duration = asf->hdr.play_time /
377 (10000000 / 1000) - start_time;
381 test_for_ext_stream_audio = 0;
382 if (!ff_guidcmp(&g, &ff_asf_audio_stream)) {
383 type = AVMEDIA_TYPE_AUDIO;
384 } else if (!ff_guidcmp(&g, &ff_asf_video_stream)) {
385 type = AVMEDIA_TYPE_VIDEO;
386 } else if (!ff_guidcmp(&g, &ff_asf_jfif_media)) {
387 type = AVMEDIA_TYPE_VIDEO;
388 st->codec->codec_id = AV_CODEC_ID_MJPEG;
389 } else if (!ff_guidcmp(&g, &ff_asf_command_stream)) {
390 type = AVMEDIA_TYPE_DATA;
391 } else if (!ff_guidcmp(&g, &ff_asf_ext_stream_embed_stream_header)) {
392 test_for_ext_stream_audio = 1;
393 type = AVMEDIA_TYPE_UNKNOWN;
398 avio_skip(pb, 8); /* total_size */
399 type_specific_size = avio_rl32(pb);
401 st->id = avio_rl16(pb) & 0x7f; /* stream id */
402 // mapping of asf ID to AV stream ID;
403 asf->asfid2avid[st->id] = s->nb_streams - 1;
404 asf_st = &asf->streams[st->id];
408 if (test_for_ext_stream_audio) {
410 if (!ff_guidcmp(&g, &ff_asf_ext_stream_audio_stream)) {
411 type = AVMEDIA_TYPE_AUDIO;
422 st->codec->codec_type = type;
423 if (type == AVMEDIA_TYPE_AUDIO) {
424 int ret = ff_get_wav_header(pb, st->codec, type_specific_size);
427 if (is_dvr_ms_audio) {
428 // codec_id and codec_tag are unreliable in dvr_ms
429 // files. Set them later by probing stream.
430 st->request_probe = 1;
431 st->codec->codec_tag = 0;
433 if (st->codec->codec_id == AV_CODEC_ID_AAC)
434 st->need_parsing = AVSTREAM_PARSE_NONE;
436 st->need_parsing = AVSTREAM_PARSE_FULL;
437 /* We have to init the frame size at some point .... */
438 pos2 = avio_tell(pb);
439 if (size >= (pos2 + 8 - pos1 + 24)) {
440 asf_st->ds_span = avio_r8(pb);
441 asf_st->ds_packet_size = avio_rl16(pb);
442 asf_st->ds_chunk_size = avio_rl16(pb);
443 avio_rl16(pb); // ds_data_size
444 avio_r8(pb); // ds_silence_data
446 if (asf_st->ds_span > 1) {
447 if (!asf_st->ds_chunk_size ||
448 (asf_st->ds_packet_size / asf_st->ds_chunk_size <= 1) ||
449 asf_st->ds_packet_size % asf_st->ds_chunk_size)
450 asf_st->ds_span = 0; // disable descrambling
452 } else if (type == AVMEDIA_TYPE_VIDEO &&
453 size - (avio_tell(pb) - pos1 + 24) >= 51) {
457 avio_rl16(pb); /* size */
458 sizeX = avio_rl32(pb); /* size */
459 st->codec->width = avio_rl32(pb);
460 st->codec->height = avio_rl32(pb);
461 /* not available for asf */
462 avio_rl16(pb); /* panes */
463 st->codec->bits_per_coded_sample = avio_rl16(pb); /* depth */
464 tag1 = avio_rl32(pb);
467 st->codec->extradata_size = ffio_limit(pb, sizeX - 40);
468 st->codec->extradata = av_mallocz(st->codec->extradata_size +
469 FF_INPUT_BUFFER_PADDING_SIZE);
470 if (!st->codec->extradata)
471 return AVERROR(ENOMEM);
472 avio_read(pb, st->codec->extradata, st->codec->extradata_size);
475 /* Extract palette from extradata if bpp <= 8 */
476 /* This code assumes that extradata contains only palette */
477 /* This is true for all paletted codecs implemented in libavcodec */
478 if (st->codec->extradata_size && (st->codec->bits_per_coded_sample <= 8)) {
481 for (i = 0; i < FFMIN(st->codec->extradata_size, AVPALETTE_SIZE) / 4; i++)
482 asf_st->palette[i] = av_bswap32(((uint32_t *)st->codec->extradata)[i]);
484 memcpy(asf_st->palette, st->codec->extradata,
485 FFMIN(st->codec->extradata_size, AVPALETTE_SIZE));
487 asf_st->palette_changed = 1;
490 st->codec->codec_tag = tag1;
491 st->codec->codec_id = ff_codec_get_id(ff_codec_bmp_tags, tag1);
492 if (tag1 == MKTAG('D', 'V', 'R', ' ')) {
493 st->need_parsing = AVSTREAM_PARSE_FULL;
494 /* issue658 contains wrong w/h and MS even puts a fake seq header
495 * with wrong w/h in extradata while a correct one is in the stream.
496 * maximum lameness */
498 st->codec->height = 0;
499 av_freep(&st->codec->extradata);
500 st->codec->extradata_size = 0;
502 if (st->codec->codec_id == AV_CODEC_ID_H264)
503 st->need_parsing = AVSTREAM_PARSE_FULL_ONCE;
504 if (st->codec->codec_id == AV_CODEC_ID_MPEG4)
505 st->need_parsing = AVSTREAM_PARSE_FULL_ONCE;
507 pos2 = avio_tell(pb);
508 avio_skip(pb, size - (pos2 - pos1 + 24));
513 static int asf_read_ext_stream_properties(AVFormatContext *s, int64_t size)
515 ASFContext *asf = s->priv_data;
516 AVIOContext *pb = s->pb;
518 int ext_len, payload_ext_ct, stream_ct, i;
519 uint32_t leak_rate, stream_num;
520 unsigned int stream_languageid_index;
522 avio_rl64(pb); // starttime
523 avio_rl64(pb); // endtime
524 leak_rate = avio_rl32(pb); // leak-datarate
525 avio_rl32(pb); // bucket-datasize
526 avio_rl32(pb); // init-bucket-fullness
527 avio_rl32(pb); // alt-leak-datarate
528 avio_rl32(pb); // alt-bucket-datasize
529 avio_rl32(pb); // alt-init-bucket-fullness
530 avio_rl32(pb); // max-object-size
531 avio_rl32(pb); // flags (reliable,seekable,no_cleanpoints?,resend-live-cleanpoints, rest of bits reserved)
532 stream_num = avio_rl16(pb); // stream-num
534 stream_languageid_index = avio_rl16(pb); // stream-language-id-index
535 if (stream_num < 128)
536 asf->streams[stream_num].stream_language_index = stream_languageid_index;
538 avio_rl64(pb); // avg frametime in 100ns units
539 stream_ct = avio_rl16(pb); // stream-name-count
540 payload_ext_ct = avio_rl16(pb); // payload-extension-system-count
542 if (stream_num < 128) {
543 asf->stream_bitrates[stream_num] = leak_rate;
544 asf->streams[stream_num].payload_ext_ct = 0;
547 for (i = 0; i < stream_ct; i++) {
549 ext_len = avio_rl16(pb);
550 avio_skip(pb, ext_len);
553 for (i = 0; i < payload_ext_ct; i++) {
556 size = avio_rl16(pb);
557 ext_len = avio_rl32(pb);
558 avio_skip(pb, ext_len);
559 if (stream_num < 128 && i < FF_ARRAY_ELEMS(asf->streams[stream_num].payload)) {
560 ASFPayload *p = &asf->streams[stream_num].payload[i];
563 av_log(s, AV_LOG_DEBUG, "Payload extension %x %d\n", g[0], p->size );
564 asf->streams[stream_num].payload_ext_ct ++;
571 static int asf_read_content_desc(AVFormatContext *s, int64_t size)
573 AVIOContext *pb = s->pb;
574 int len1, len2, len3, len4, len5;
576 len1 = avio_rl16(pb);
577 len2 = avio_rl16(pb);
578 len3 = avio_rl16(pb);
579 len4 = avio_rl16(pb);
580 len5 = avio_rl16(pb);
581 get_tag(s, "title", 0, len1, 32);
582 get_tag(s, "author", 0, len2, 32);
583 get_tag(s, "copyright", 0, len3, 32);
584 get_tag(s, "comment", 0, len4, 32);
590 static int asf_read_ext_content_desc(AVFormatContext *s, int64_t size)
592 AVIOContext *pb = s->pb;
593 ASFContext *asf = s->priv_data;
594 int desc_count, i, ret;
596 desc_count = avio_rl16(pb);
597 for (i = 0; i < desc_count; i++) {
598 int name_len, value_type, value_len;
601 name_len = avio_rl16(pb);
602 if (name_len % 2) // must be even, broken lavf versions wrote len-1
604 if ((ret = avio_get_str16le(pb, name_len, name, sizeof(name))) < name_len)
605 avio_skip(pb, name_len - ret);
606 value_type = avio_rl16(pb);
607 value_len = avio_rl16(pb);
608 if (!value_type && value_len % 2)
610 /* My sample has that stream set to 0 maybe that mean the container.
611 * ASF stream count starts at 1. I am using 0 to the container value
612 * since it's unused. */
613 if (!strcmp(name, "AspectRatioX"))
614 asf->dar[0].num = get_value(s->pb, value_type, 32);
615 else if (!strcmp(name, "AspectRatioY"))
616 asf->dar[0].den = get_value(s->pb, value_type, 32);
618 get_tag(s, name, value_type, value_len, 32);
624 static int asf_read_language_list(AVFormatContext *s, int64_t size)
626 AVIOContext *pb = s->pb;
627 ASFContext *asf = s->priv_data;
629 int stream_count = avio_rl16(pb);
630 for (j = 0; j < stream_count; j++) {
632 unsigned int lang_len = avio_r8(pb);
633 if ((ret = avio_get_str16le(pb, lang_len, lang,
634 sizeof(lang))) < lang_len)
635 avio_skip(pb, lang_len - ret);
637 av_strlcpy(asf->stream_languages[j], lang,
638 sizeof(*asf->stream_languages));
644 static int asf_read_metadata(AVFormatContext *s, int64_t size)
646 AVIOContext *pb = s->pb;
647 ASFContext *asf = s->priv_data;
648 int n, stream_num, name_len, value_len;
652 for (i = 0; i < n; i++) {
656 avio_rl16(pb); // lang_list_index
657 stream_num = avio_rl16(pb);
658 name_len = avio_rl16(pb);
659 value_type = avio_rl16(pb); /* value_type */
660 value_len = avio_rl32(pb);
662 if ((ret = avio_get_str16le(pb, name_len, name, sizeof(name))) < name_len)
663 avio_skip(pb, name_len - ret);
664 av_dlog(s, "%d stream %d name_len %2d type %d len %4d <%s>\n",
665 i, stream_num, name_len, value_type, value_len, name);
667 if (!strcmp(name, "AspectRatioX")){
668 int aspect_x = get_value(s->pb, value_type, 16);
670 asf->dar[stream_num].num = aspect_x;
671 } else if(!strcmp(name, "AspectRatioY")){
672 int aspect_y = get_value(s->pb, value_type, 16);
674 asf->dar[stream_num].den = aspect_y;
676 get_tag(s, name, value_type, value_len, 16);
683 static int asf_read_marker(AVFormatContext *s, int64_t size)
685 AVIOContext *pb = s->pb;
686 ASFContext *asf = s->priv_data;
687 int i, count, name_len, ret;
690 avio_rl64(pb); // reserved 16 bytes
691 avio_rl64(pb); // ...
692 count = avio_rl32(pb); // markers count
693 avio_rl16(pb); // reserved 2 bytes
694 name_len = avio_rl16(pb); // name length
695 for (i = 0; i < name_len; i++)
696 avio_r8(pb); // skip the name
698 for (i = 0; i < count; i++) {
702 avio_rl64(pb); // offset, 8 bytes
703 pres_time = avio_rl64(pb); // presentation time
704 pres_time -= asf->hdr.preroll * 10000;
705 avio_rl16(pb); // entry length
706 avio_rl32(pb); // send time
707 avio_rl32(pb); // flags
708 name_len = avio_rl32(pb); // name length
709 if ((ret = avio_get_str16le(pb, name_len * 2, name,
710 sizeof(name))) < name_len)
711 avio_skip(pb, name_len - ret);
712 avpriv_new_chapter(s, i, (AVRational) { 1, 10000000 }, pres_time,
713 AV_NOPTS_VALUE, name);
719 static int asf_read_header(AVFormatContext *s)
721 ASFContext *asf = s->priv_data;
723 AVIOContext *pb = s->pb;
728 if (ff_guidcmp(&g, &ff_asf_header))
729 return AVERROR_INVALIDDATA;
734 memset(&asf->asfid2avid, -1, sizeof(asf->asfid2avid));
736 for (i = 0; i<128; i++)
737 asf->streams[i].stream_language_index = 128; // invalid stream index means no language info
740 uint64_t gpos = avio_tell(pb);
742 gsize = avio_rl64(pb);
744 if (!ff_guidcmp(&g, &ff_asf_data_header)) {
745 asf->data_object_offset = avio_tell(pb);
746 /* If not streaming, gsize is not unlimited (how?),
747 * and there is enough space in the file.. */
748 if (!(asf->hdr.flags & 0x01) && gsize >= 100)
749 asf->data_object_size = gsize - 24;
751 asf->data_object_size = (uint64_t)-1;
755 return AVERROR_INVALIDDATA;
756 if (!ff_guidcmp(&g, &ff_asf_file_header)) {
757 int ret = asf_read_file_properties(s, gsize);
760 } else if (!ff_guidcmp(&g, &ff_asf_stream_header)) {
761 int ret = asf_read_stream_properties(s, gsize);
764 } else if (!ff_guidcmp(&g, &ff_asf_comment_header)) {
765 asf_read_content_desc(s, gsize);
766 } else if (!ff_guidcmp(&g, &ff_asf_language_guid)) {
767 asf_read_language_list(s, gsize);
768 } else if (!ff_guidcmp(&g, &ff_asf_extended_content_header)) {
769 asf_read_ext_content_desc(s, gsize);
770 } else if (!ff_guidcmp(&g, &ff_asf_metadata_header)) {
771 asf_read_metadata(s, gsize);
772 } else if (!ff_guidcmp(&g, &ff_asf_metadata_library_header)) {
773 asf_read_metadata(s, gsize);
774 } else if (!ff_guidcmp(&g, &ff_asf_ext_stream_header)) {
775 asf_read_ext_stream_properties(s, gsize);
777 // there could be a optional stream properties object to follow
778 // if so the next iteration will pick it up
780 } else if (!ff_guidcmp(&g, &ff_asf_head1_guid)) {
784 } else if (!ff_guidcmp(&g, &ff_asf_marker_header)) {
785 asf_read_marker(s, gsize);
786 } else if (url_feof(pb)) {
790 if (!ff_guidcmp(&g, &ff_asf_content_encryption)) {
793 av_log(s, AV_LOG_WARNING,
794 "DRM protected stream detected, decoding will likely fail!\n");
796 av_log(s, AV_LOG_DEBUG, "Secret data:\n");
797 av_get_packet(pb, &pkt, len); av_hex_dump_log(s, AV_LOG_DEBUG, pkt.data, pkt.size); av_free_packet(&pkt);
799 get_tag(s, "ASF_Protection_Type", -1, len, 32);
801 get_tag(s, "ASF_Key_ID", -1, len, 32);
803 get_tag(s, "ASF_License_URL", -1, len, 32);
804 } else if (!ff_guidcmp(&g, &ff_asf_ext_content_encryption)) {
805 av_log(s, AV_LOG_WARNING,
806 "Ext DRM protected stream detected, decoding will likely fail!\n");
807 av_dict_set(&s->metadata, "encryption", "ASF Extended Content Encryption", 0);
808 } else if (!ff_guidcmp(&g, &ff_asf_digital_signature)) {
809 av_log(s, AV_LOG_INFO, "Digital signature detected!\n");
813 if (avio_tell(pb) != gpos + gsize)
814 av_log(s, AV_LOG_DEBUG,
815 "gpos mismatch our pos=%"PRIu64", end=%"PRId64"\n",
816 avio_tell(pb) - gpos, gsize);
817 avio_seek(pb, gpos + gsize, SEEK_SET);
825 asf->data_offset = avio_tell(pb);
826 asf->packet_size_left = 0;
828 for (i = 0; i < 128; i++) {
829 int stream_num = asf->asfid2avid[i];
830 if (stream_num >= 0) {
831 AVStream *st = s->streams[stream_num];
832 if (!st->codec->bit_rate)
833 st->codec->bit_rate = asf->stream_bitrates[i];
834 if (asf->dar[i].num > 0 && asf->dar[i].den > 0) {
835 av_reduce(&st->sample_aspect_ratio.num,
836 &st->sample_aspect_ratio.den,
837 asf->dar[i].num, asf->dar[i].den, INT_MAX);
838 } else if ((asf->dar[0].num > 0) && (asf->dar[0].den > 0) &&
839 // Use ASF container value if the stream doesn't set AR.
840 (st->codec->codec_type == AVMEDIA_TYPE_VIDEO))
841 av_reduce(&st->sample_aspect_ratio.num,
842 &st->sample_aspect_ratio.den,
843 asf->dar[0].num, asf->dar[0].den, INT_MAX);
845 av_dlog(s, "i=%d, st->codec->codec_type:%d, asf->dar %d:%d sar=%d:%d\n",
846 i, st->codec->codec_type, asf->dar[i].num, asf->dar[i].den,
847 st->sample_aspect_ratio.num, st->sample_aspect_ratio.den);
849 // copy and convert language codes to the frontend
850 if (asf->streams[i].stream_language_index < 128) {
851 const char *rfc1766 = asf->stream_languages[asf->streams[i].stream_language_index];
852 if (rfc1766 && strlen(rfc1766) > 1) {
853 const char primary_tag[3] = { rfc1766[0], rfc1766[1], '\0' }; // ignore country code if any
854 const char *iso6392 = av_convert_lang_to(primary_tag,
855 AV_LANG_ISO639_2_BIBL);
857 av_dict_set(&st->metadata, "language", iso6392, 0);
863 ff_metadata_conv(&s->metadata, NULL, ff_asf_metadata_conv);
868 #define DO_2BITS(bits, var, defval) \
869 switch (bits & 3) { \
871 var = avio_rl32(pb); \
875 var = avio_rl16(pb); \
888 * Load a single ASF packet into the demuxer.
889 * @param s demux context
890 * @param pb context to read data from
891 * @return 0 on success, <0 on error
893 static int asf_get_packet(AVFormatContext *s, AVIOContext *pb)
895 ASFContext *asf = s->priv_data;
896 uint32_t packet_length, padsize;
900 // if we do not know packet size, allow skipping up to 32 kB
902 if (asf->no_resync_search)
904 else if (s->packet_size > 0)
905 off = (avio_tell(pb) - s->data_offset) % s->packet_size + 3;
912 if (c == 0x82 && !d && !e)
917 /* This code allows handling of -EAGAIN at packet boundaries (i.e.
918 * if the packet sync code above triggers -EAGAIN). This does not
919 * imply complete -EAGAIN handling support at random positions in
921 if (pb->error == AVERROR(EAGAIN))
922 return AVERROR(EAGAIN);
924 av_log(s, AV_LOG_ERROR,
925 "ff asf bad header %x at:%"PRId64"\n", c, avio_tell(pb));
927 if ((c & 0x8f) == 0x82) {
930 av_log(s, AV_LOG_ERROR, "ff asf bad non zero\n");
931 return AVERROR_INVALIDDATA;
936 } else if(!url_feof(pb)) {
937 avio_seek(pb, -1, SEEK_CUR); // FIXME
940 asf->packet_flags = c;
941 asf->packet_property = d;
943 DO_2BITS(asf->packet_flags >> 5, packet_length, s->packet_size);
944 DO_2BITS(asf->packet_flags >> 1, padsize, 0); // sequence ignored
945 DO_2BITS(asf->packet_flags >> 3, padsize, 0); // padding length
947 // the following checks prevent overflows and infinite loops
948 if (!packet_length || packet_length >= (1U << 29)) {
949 av_log(s, AV_LOG_ERROR,
950 "invalid packet_length %"PRIu32" at:%"PRId64"\n",
951 packet_length, avio_tell(pb));
952 return AVERROR_INVALIDDATA;
954 if (padsize >= packet_length) {
955 av_log(s, AV_LOG_ERROR,
956 "invalid padsize %"PRIu32" at:%"PRId64"\n", padsize, avio_tell(pb));
957 return AVERROR_INVALIDDATA;
960 asf->packet_timestamp = avio_rl32(pb);
961 avio_rl16(pb); /* duration */
962 // rsize has at least 11 bytes which have to be present
964 if (asf->packet_flags & 0x01) {
965 asf->packet_segsizetype = avio_r8(pb);
967 asf->packet_segments = asf->packet_segsizetype & 0x3f;
969 asf->packet_segments = 1;
970 asf->packet_segsizetype = 0x80;
972 if (rsize > packet_length - padsize) {
973 asf->packet_size_left = 0;
974 av_log(s, AV_LOG_ERROR,
975 "invalid packet header length %d for pktlen %"PRIu32"-%"PRIu32" at %"PRId64"\n",
976 rsize, packet_length, padsize, avio_tell(pb));
977 return AVERROR_INVALIDDATA;
979 asf->packet_size_left = packet_length - padsize - rsize;
980 if (packet_length < asf->hdr.min_pktsize)
981 padsize += asf->hdr.min_pktsize - packet_length;
982 asf->packet_padsize = padsize;
983 av_dlog(s, "packet: size=%d padsize=%d left=%d\n",
984 s->packet_size, asf->packet_padsize, asf->packet_size_left);
990 * @return <0 if error
992 static int asf_read_frame_header(AVFormatContext *s, AVIOContext *pb)
994 ASFContext *asf = s->priv_data;
997 int num = avio_r8(pb);
999 int64_t ts0, ts1 av_unused;
1001 asf->packet_segments--;
1002 asf->packet_key_frame = num >> 7;
1003 asf->stream_index = asf->asfid2avid[num & 0x7f];
1004 asfst = &asf->streams[num & 0x7f];
1005 // sequence should be ignored!
1006 DO_2BITS(asf->packet_property >> 4, asf->packet_seq, 0);
1007 DO_2BITS(asf->packet_property >> 2, asf->packet_frag_offset, 0);
1008 DO_2BITS(asf->packet_property, asf->packet_replic_size, 0);
1009 av_dlog(asf, "key:%d stream:%d seq:%d offset:%d replic_size:%d\n",
1010 asf->packet_key_frame, asf->stream_index, asf->packet_seq,
1011 asf->packet_frag_offset, asf->packet_replic_size);
1012 if (rsize+(int64_t)asf->packet_replic_size > asf->packet_size_left) {
1013 av_log(s, AV_LOG_ERROR, "packet_replic_size %d is invalid\n", asf->packet_replic_size);
1014 return AVERROR_INVALIDDATA;
1016 if (asf->packet_replic_size >= 8) {
1017 int64_t end = avio_tell(pb) + asf->packet_replic_size;
1019 asfst->packet_obj_size = avio_rl32(pb);
1020 if (asfst->packet_obj_size >= (1 << 24) || asfst->packet_obj_size <= 0) {
1021 av_log(s, AV_LOG_ERROR, "packet_obj_size invalid\n");
1022 asfst->packet_obj_size = 0;
1023 return AVERROR_INVALIDDATA;
1025 asf->packet_frag_timestamp = avio_rl32(pb); // timestamp
1027 for (i = 0; i < asfst->payload_ext_ct; i++) {
1028 ASFPayload *p = &asfst->payload[i];
1032 size = avio_rl16(pb);
1033 payend = avio_tell(pb) + size;
1035 av_log(s, AV_LOG_ERROR, "too long payload\n");
1040 // duration = avio_rl16(pb);
1043 aspect.num = avio_r8(pb);
1044 aspect.den = avio_r8(pb);
1045 if (aspect.num > 0 && aspect.den > 0 && asf->stream_index >= 0) {
1046 s->streams[asf->stream_index]->sample_aspect_ratio = aspect;
1051 ts0 = avio_rl64(pb);
1052 ts1 = avio_rl64(pb);
1053 if (ts0!= -1) asf->packet_frag_timestamp = ts0/10000;
1054 else asf->packet_frag_timestamp = AV_NOPTS_VALUE;
1064 avio_seek(pb, payend, SEEK_SET);
1067 avio_seek(pb, end, SEEK_SET);
1068 rsize += asf->packet_replic_size; // FIXME - check validity
1069 } else if (asf->packet_replic_size == 1) {
1070 // multipacket - frag_offset is beginning timestamp
1071 asf->packet_time_start = asf->packet_frag_offset;
1072 asf->packet_frag_offset = 0;
1073 asf->packet_frag_timestamp = asf->packet_timestamp;
1075 asf->packet_time_delta = avio_r8(pb);
1077 } else if (asf->packet_replic_size != 0) {
1078 av_log(s, AV_LOG_ERROR, "unexpected packet_replic_size of %d\n",
1079 asf->packet_replic_size);
1080 return AVERROR_INVALIDDATA;
1082 if (asf->packet_flags & 0x01) {
1083 DO_2BITS(asf->packet_segsizetype >> 6, asf->packet_frag_size, 0); // 0 is illegal
1084 if (rsize > asf->packet_size_left) {
1085 av_log(s, AV_LOG_ERROR, "packet_replic_size is invalid\n");
1086 return AVERROR_INVALIDDATA;
1087 } else if (asf->packet_frag_size > asf->packet_size_left - rsize) {
1088 if (asf->packet_frag_size > asf->packet_size_left - rsize + asf->packet_padsize) {
1089 av_log(s, AV_LOG_ERROR, "packet_frag_size is invalid (%d-%d)\n",
1090 asf->packet_size_left, rsize);
1091 return AVERROR_INVALIDDATA;
1093 int diff = asf->packet_frag_size - (asf->packet_size_left - rsize);
1094 asf->packet_size_left += diff;
1095 asf->packet_padsize -= diff;
1099 asf->packet_frag_size = asf->packet_size_left - rsize;
1101 if (asf->packet_replic_size == 1) {
1102 asf->packet_multi_size = asf->packet_frag_size;
1103 if (asf->packet_multi_size > asf->packet_size_left)
1104 return AVERROR_INVALIDDATA;
1106 asf->packet_size_left -= rsize;
1112 * Parse data from individual ASF packets (which were previously loaded
1113 * with asf_get_packet()).
1114 * @param s demux context
1115 * @param pb context to read data from
1116 * @param pkt pointer to store packet data into
1117 * @return 0 if data was stored in pkt, <0 on error or 1 if more ASF
1118 * packets need to be loaded (through asf_get_packet())
1120 static int asf_parse_packet(AVFormatContext *s, AVIOContext *pb, AVPacket *pkt)
1122 ASFContext *asf = s->priv_data;
1123 ASFStream *asf_st = 0;
1129 if (asf->packet_size_left < FRAME_HEADER_SIZE) {
1130 int ret = asf->packet_size_left + asf->packet_padsize;
1136 asf->packet_pos = avio_tell(pb);
1137 if (asf->data_object_size != (uint64_t)-1 &&
1138 (asf->packet_pos - asf->data_object_offset >= asf->data_object_size))
1139 return AVERROR_EOF; /* Do not exceed the size of the data object */
1142 if (asf->packet_time_start == 0) {
1143 if (asf_read_frame_header(s, pb) < 0) {
1144 asf->packet_time_start = asf->packet_segments = 0;
1147 if (asf->stream_index < 0 ||
1148 s->streams[asf->stream_index]->discard >= AVDISCARD_ALL ||
1149 (!asf->packet_key_frame &&
1150 (s->streams[asf->stream_index]->discard >= AVDISCARD_NONKEY || asf->streams[s->streams[asf->stream_index]->id].skip_to_key))) {
1151 asf->packet_time_start = 0;
1152 /* unhandled packet (should not happen) */
1153 avio_skip(pb, asf->packet_frag_size);
1154 asf->packet_size_left -= asf->packet_frag_size;
1155 if (asf->stream_index < 0)
1156 av_log(s, AV_LOG_ERROR, "ff asf skip %d (unknown stream)\n",
1157 asf->packet_frag_size);
1160 asf->asf_st = &asf->streams[s->streams[asf->stream_index]->id];
1161 asf->asf_st->skip_to_key = 0;
1163 asf_st = asf->asf_st;
1166 if (!asf_st->frag_offset && asf->packet_frag_offset) {
1167 av_dlog(s, "skipping asf data pkt with fragment offset for "
1168 "stream:%d, expected:%d but got %d from pkt)\n",
1169 asf->stream_index, asf_st->frag_offset,
1170 asf->packet_frag_offset);
1171 avio_skip(pb, asf->packet_frag_size);
1172 asf->packet_size_left -= asf->packet_frag_size;
1176 if (asf->packet_replic_size == 1) {
1177 // frag_offset is here used as the beginning timestamp
1178 asf->packet_frag_timestamp = asf->packet_time_start;
1179 asf->packet_time_start += asf->packet_time_delta;
1180 asf_st->packet_obj_size = asf->packet_frag_size = avio_r8(pb);
1181 asf->packet_size_left--;
1182 asf->packet_multi_size--;
1183 if (asf->packet_multi_size < asf_st->packet_obj_size) {
1184 asf->packet_time_start = 0;
1185 avio_skip(pb, asf->packet_multi_size);
1186 asf->packet_size_left -= asf->packet_multi_size;
1189 asf->packet_multi_size -= asf_st->packet_obj_size;
1192 if (asf_st->pkt.size != asf_st->packet_obj_size ||
1193 // FIXME is this condition sufficient?
1194 asf_st->frag_offset + asf->packet_frag_size > asf_st->pkt.size) {
1195 if (asf_st->pkt.data) {
1196 av_log(s, AV_LOG_INFO,
1197 "freeing incomplete packet size %d, new %d\n",
1198 asf_st->pkt.size, asf_st->packet_obj_size);
1199 asf_st->frag_offset = 0;
1200 av_free_packet(&asf_st->pkt);
1203 av_new_packet(&asf_st->pkt, asf_st->packet_obj_size);
1204 asf_st->seq = asf->packet_seq;
1205 asf_st->pkt.dts = asf->packet_frag_timestamp - asf->hdr.preroll;
1206 asf_st->pkt.stream_index = asf->stream_index;
1207 asf_st->pkt.pos = asf_st->packet_pos = asf->packet_pos;
1208 asf_st->pkt_clean = 0;
1210 if (asf_st->pkt.data && asf_st->palette_changed) {
1212 pal = av_packet_new_side_data(&asf_st->pkt, AV_PKT_DATA_PALETTE,
1215 av_log(s, AV_LOG_ERROR, "Cannot append palette to packet\n");
1217 memcpy(pal, asf_st->palette, AVPALETTE_SIZE);
1218 asf_st->palette_changed = 0;
1221 av_dlog(asf, "new packet: stream:%d key:%d packet_key:%d audio:%d size:%d\n",
1222 asf->stream_index, asf->packet_key_frame,
1223 asf_st->pkt.flags & AV_PKT_FLAG_KEY,
1224 s->streams[asf->stream_index]->codec->codec_type == AVMEDIA_TYPE_AUDIO,
1225 asf_st->packet_obj_size);
1226 if (s->streams[asf->stream_index]->codec->codec_type == AVMEDIA_TYPE_AUDIO)
1227 asf->packet_key_frame = 1;
1228 if (asf->packet_key_frame)
1229 asf_st->pkt.flags |= AV_PKT_FLAG_KEY;
1233 av_dlog(asf, "READ PACKET s:%d os:%d o:%d,%d l:%d DATA:%p\n",
1234 s->packet_size, asf_st->pkt.size, asf->packet_frag_offset,
1235 asf_st->frag_offset, asf->packet_frag_size, asf_st->pkt.data);
1236 asf->packet_size_left -= asf->packet_frag_size;
1237 if (asf->packet_size_left < 0)
1240 if (asf->packet_frag_offset >= asf_st->pkt.size ||
1241 asf->packet_frag_size > asf_st->pkt.size - asf->packet_frag_offset) {
1242 av_log(s, AV_LOG_ERROR,
1243 "packet fragment position invalid %u,%u not in %u\n",
1244 asf->packet_frag_offset, asf->packet_frag_size,
1249 if (asf->packet_frag_offset != asf_st->frag_offset && !asf_st->pkt_clean) {
1250 memset(asf_st->pkt.data + asf_st->frag_offset, 0, asf_st->pkt.size - asf_st->frag_offset);
1251 asf_st->pkt_clean = 1;
1254 ret = avio_read(pb, asf_st->pkt.data + asf->packet_frag_offset,
1255 asf->packet_frag_size);
1256 if (ret != asf->packet_frag_size) {
1257 if (ret < 0 || asf->packet_frag_offset + ret == 0)
1258 return ret < 0 ? ret : AVERROR_EOF;
1260 if (asf_st->ds_span > 1) {
1261 // scrambling, we can either drop it completely or fill the remainder
1262 // TODO: should we fill the whole packet instead of just the current
1264 memset(asf_st->pkt.data + asf->packet_frag_offset + ret, 0,
1265 asf->packet_frag_size - ret);
1266 ret = asf->packet_frag_size;
1268 // no scrambling, so we can return partial packets
1269 av_shrink_packet(&asf_st->pkt, asf->packet_frag_offset + ret);
1272 if (s->key && s->keylen == 20)
1273 ff_asfcrypt_dec(s->key, asf_st->pkt.data + asf->packet_frag_offset,
1275 asf_st->frag_offset += ret;
1276 /* test if whole packet is read */
1277 if (asf_st->frag_offset == asf_st->pkt.size) {
1278 // workaround for macroshit radio DVR-MS files
1279 if (s->streams[asf->stream_index]->codec->codec_id == AV_CODEC_ID_MPEG2VIDEO &&
1280 asf_st->pkt.size > 100) {
1282 for (i = 0; i < asf_st->pkt.size && !asf_st->pkt.data[i]; i++)
1284 if (i == asf_st->pkt.size) {
1285 av_log(s, AV_LOG_DEBUG, "discarding ms fart\n");
1286 asf_st->frag_offset = 0;
1287 av_free_packet(&asf_st->pkt);
1293 if (asf_st->ds_span > 1) {
1294 if (asf_st->pkt.size != asf_st->ds_packet_size * asf_st->ds_span) {
1295 av_log(s, AV_LOG_ERROR,
1296 "pkt.size != ds_packet_size * ds_span (%d %d %d)\n",
1297 asf_st->pkt.size, asf_st->ds_packet_size,
1300 /* packet descrambling */
1301 AVBufferRef *buf = av_buffer_alloc(asf_st->pkt.size +
1302 FF_INPUT_BUFFER_PADDING_SIZE);
1304 uint8_t *newdata = buf->data;
1306 memset(newdata + asf_st->pkt.size, 0,
1307 FF_INPUT_BUFFER_PADDING_SIZE);
1308 while (offset < asf_st->pkt.size) {
1309 int off = offset / asf_st->ds_chunk_size;
1310 int row = off / asf_st->ds_span;
1311 int col = off % asf_st->ds_span;
1312 int idx = row + col * asf_st->ds_packet_size / asf_st->ds_chunk_size;
1313 assert(offset + asf_st->ds_chunk_size <= asf_st->pkt.size);
1314 assert(idx + 1 <= asf_st->pkt.size / asf_st->ds_chunk_size);
1315 memcpy(newdata + offset,
1316 asf_st->pkt.data + idx * asf_st->ds_chunk_size,
1317 asf_st->ds_chunk_size);
1318 offset += asf_st->ds_chunk_size;
1320 av_buffer_unref(&asf_st->pkt.buf);
1321 asf_st->pkt.buf = buf;
1322 asf_st->pkt.data = buf->data;
1326 asf_st->frag_offset = 0;
1328 #if FF_API_DESTRUCT_PACKET
1329 FF_DISABLE_DEPRECATION_WARNINGS
1330 asf_st->pkt.destruct = NULL;
1331 FF_ENABLE_DEPRECATION_WARNINGS
1333 asf_st->pkt.buf = 0;
1334 asf_st->pkt.size = 0;
1335 asf_st->pkt.data = 0;
1336 asf_st->pkt.side_data_elems = 0;
1337 asf_st->pkt.side_data = NULL;
1338 break; // packet completed
1344 static int asf_read_packet(AVFormatContext *s, AVPacket *pkt)
1346 ASFContext *asf = s->priv_data;
1351 /* parse cached packets, if any */
1352 if ((ret = asf_parse_packet(s, s->pb, pkt)) <= 0)
1354 if ((ret = asf_get_packet(s, s->pb)) < 0)
1355 assert(asf->packet_size_left < FRAME_HEADER_SIZE ||
1356 asf->packet_segments < 1);
1357 asf->packet_time_start = 0;
1361 // Added to support seeking after packets have been read
1362 // If information is not reset, read_packet fails due to
1363 // leftover information from previous reads
1364 static void asf_reset_header(AVFormatContext *s)
1366 ASFContext *asf = s->priv_data;
1370 asf->packet_size_left = 0;
1371 asf->packet_flags = 0;
1372 asf->packet_property = 0;
1373 asf->packet_timestamp = 0;
1374 asf->packet_segsizetype = 0;
1375 asf->packet_segments = 0;
1376 asf->packet_seq = 0;
1377 asf->packet_replic_size = 0;
1378 asf->packet_key_frame = 0;
1379 asf->packet_padsize = 0;
1380 asf->packet_frag_offset = 0;
1381 asf->packet_frag_size = 0;
1382 asf->packet_frag_timestamp = 0;
1383 asf->packet_multi_size = 0;
1384 asf->packet_time_delta = 0;
1385 asf->packet_time_start = 0;
1387 for (i = 0; i < 128; i++) {
1388 asf_st = &asf->streams[i];
1389 av_free_packet(&asf_st->pkt);
1390 asf_st->packet_obj_size = 0;
1391 asf_st->frag_offset = 0;
1397 static void skip_to_key(AVFormatContext *s)
1399 ASFContext *asf = s->priv_data;
1402 for (i = 0; i < 128; i++) {
1403 int j = asf->asfid2avid[i];
1404 ASFStream *asf_st = &asf->streams[i];
1405 if (j < 0 || s->streams[j]->codec->codec_type != AVMEDIA_TYPE_VIDEO)
1408 asf_st->skip_to_key = 1;
1412 static int asf_read_close(AVFormatContext *s)
1414 asf_reset_header(s);
1419 static int64_t asf_read_pts(AVFormatContext *s, int stream_index,
1420 int64_t *ppos, int64_t pos_limit)
1422 ASFContext *asf = s->priv_data;
1423 AVPacket pkt1, *pkt = &pkt1;
1426 int64_t pos = *ppos;
1428 int64_t start_pos[ASF_MAX_STREAMS];
1430 for (i = 0; i < s->nb_streams; i++)
1433 if (s->packet_size > 0)
1434 pos = (pos + s->packet_size - 1 - s->data_offset) /
1435 s->packet_size * s->packet_size +
1438 if (avio_seek(s->pb, pos, SEEK_SET) < 0)
1439 return AV_NOPTS_VALUE;
1441 ff_read_frame_flush(s);
1442 asf_reset_header(s);
1444 if (av_read_frame(s, pkt) < 0) {
1445 av_log(s, AV_LOG_INFO, "asf_read_pts failed\n");
1446 return AV_NOPTS_VALUE;
1451 av_free_packet(pkt);
1452 if (pkt->flags & AV_PKT_FLAG_KEY) {
1453 i = pkt->stream_index;
1455 asf_st = &asf->streams[s->streams[i]->id];
1457 // assert((asf_st->packet_pos - s->data_offset) % s->packet_size == 0);
1458 pos = asf_st->packet_pos;
1460 av_add_index_entry(s->streams[i], pos, pts, pkt->size,
1461 pos - start_pos[i] + 1, AVINDEX_KEYFRAME);
1462 start_pos[i] = asf_st->packet_pos + 1;
1464 if (pkt->stream_index == stream_index)
1473 static int asf_build_simple_index(AVFormatContext *s, int stream_index)
1476 ASFContext *asf = s->priv_data;
1477 int64_t current_pos = avio_tell(s->pb);
1480 if((ret = avio_seek(s->pb, asf->data_object_offset + asf->data_object_size, SEEK_SET)) < 0) {
1484 if ((ret = ff_get_guid(s->pb, &g)) < 0)
1487 /* the data object can be followed by other top-level objects,
1488 * skip them until the simple index object is reached */
1489 while (ff_guidcmp(&g, &ff_asf_simple_index_header)) {
1490 int64_t gsize = avio_rl64(s->pb);
1491 if (gsize < 24 || url_feof(s->pb)) {
1494 avio_skip(s->pb, gsize - 24);
1495 if ((ret = ff_get_guid(s->pb, &g)) < 0)
1500 int64_t itime, last_pos = -1;
1503 int64_t av_unused gsize = avio_rl64(s->pb);
1504 if ((ret = ff_get_guid(s->pb, &g)) < 0)
1506 itime = avio_rl64(s->pb);
1507 pct = avio_rl32(s->pb);
1508 ict = avio_rl32(s->pb);
1509 av_log(s, AV_LOG_DEBUG,
1510 "itime:0x%"PRIx64", pct:%d, ict:%d\n", itime, pct, ict);
1512 for (i = 0; i < ict; i++) {
1513 int pktnum = avio_rl32(s->pb);
1514 int pktct = avio_rl16(s->pb);
1515 int64_t pos = s->data_offset + s->packet_size * (int64_t)pktnum;
1516 int64_t index_pts = FFMAX(av_rescale(itime, i, 10000) - asf->hdr.preroll, 0);
1518 if (pos != last_pos) {
1519 av_log(s, AV_LOG_DEBUG, "pktnum:%d, pktct:%d pts: %"PRId64"\n",
1520 pktnum, pktct, index_pts);
1521 av_add_index_entry(s->streams[stream_index], pos, index_pts,
1522 s->packet_size, 0, AVINDEX_KEYFRAME);
1526 asf->index_read = ict > 1;
1529 // if (url_feof(s->pb)) {
1532 avio_seek(s->pb, current_pos, SEEK_SET);
1536 static int asf_read_seek(AVFormatContext *s, int stream_index,
1537 int64_t pts, int flags)
1539 ASFContext *asf = s->priv_data;
1540 AVStream *st = s->streams[stream_index];
1543 if (s->packet_size <= 0)
1546 /* Try using the protocol's read_seek if available */
1548 int ret = avio_seek_time(s->pb, stream_index, pts, flags);
1550 asf_reset_header(s);
1551 if (ret != AVERROR(ENOSYS))
1555 /* explicitly handle the case of seeking to 0 */
1557 asf_reset_header(s);
1558 avio_seek(s->pb, s->data_offset, SEEK_SET);
1562 if (!asf->index_read) {
1563 ret = asf_build_simple_index(s, stream_index);
1565 asf->index_read = -1;
1568 if (asf->index_read > 0 && st->index_entries) {
1569 int index = av_index_search_timestamp(st, pts, flags);
1571 /* find the position */
1572 uint64_t pos = st->index_entries[index].pos;
1575 av_log(s, AV_LOG_DEBUG, "SEEKTO: %"PRId64"\n", pos);
1576 if(avio_seek(s->pb, pos, SEEK_SET) < 0)
1578 asf_reset_header(s);
1583 /* no index or seeking by index failed */
1584 if (ff_seek_frame_binary(s, stream_index, pts, flags) < 0)
1586 asf_reset_header(s);
1591 AVInputFormat ff_asf_demuxer = {
1593 .long_name = NULL_IF_CONFIG_SMALL("ASF (Advanced / Active Streaming Format)"),
1594 .priv_data_size = sizeof(ASFContext),
1595 .read_probe = asf_probe,
1596 .read_header = asf_read_header,
1597 .read_packet = asf_read_packet,
1598 .read_close = asf_read_close,
1599 .read_seek = asf_read_seek,
1600 .read_timestamp = asf_read_pts,
1601 .flags = AVFMT_NOBINSEARCH | AVFMT_NOGENSEARCH,
1602 .priv_class = &asf_class,