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"
42 typedef struct ASFPayload {
47 typedef struct ASFStream {
59 int ds_span; /* descrambling */
65 uint16_t stream_language_index;
68 uint32_t palette[256];
71 ASFPayload payload[8];
74 typedef struct ASFContext {
76 int asfid2avid[128]; ///< conversion table from asf ID 2 AVStream ID
77 ASFStream streams[128]; ///< it's max number and it's not that big
78 uint32_t stream_bitrates[128]; ///< max number of streams, bitrate for each (for streaming)
80 char stream_languages[128][6]; ///< max number of streams, language for each (RFC1766, e.g. en-US)
81 /* non streamed additonnal info */
84 /* only for reading */
85 uint64_t data_offset; ///< beginning of the first data packet
86 uint64_t data_object_offset; ///< data object offset (excl. GUID & size)
87 uint64_t data_object_size; ///< size of the data object
95 int packet_segsizetype;
98 int packet_replic_size;
101 unsigned int packet_frag_offset;
102 unsigned int packet_frag_size;
103 int64_t packet_frag_timestamp;
105 int packet_multi_size;
106 int packet_time_delta;
107 int packet_time_start;
112 ASFStream *asf_st; ///< currently decoded stream
114 int no_resync_search;
118 static const AVOption options[] = {
119 { "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 },
120 { "export_xmp", "Export full XMP metadata", offsetof(ASFContext, export_xmp), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, AV_OPT_FLAG_DECODING_PARAM },
124 static const AVClass asf_class = {
125 .class_name = "asf demuxer",
126 .item_name = av_default_item_name,
128 .version = LIBAVUTIL_VERSION_INT,
134 #define ASF_MAX_STREAMS 127
135 #define FRAME_HEADER_SIZE 6
136 // Fix Me! FRAME_HEADER_SIZE may be different.
137 // (7 is known to be too large for GipsyGuitar.wmv)
140 static const ff_asf_guid stream_bitrate_guid = { /* (http://get.to/sdp) */
141 0xce, 0x75, 0xf8, 0x7b, 0x8d, 0x46, 0xd1, 0x11, 0x8d, 0x82, 0x00, 0x60, 0x97, 0xc9, 0xa2, 0xb2
144 #define PRINT_IF_GUID(g, cmp) \
145 if (!ff_guidcmp(g, &cmp)) \
146 av_log(NULL, AV_LOG_TRACE, "(GUID: %s) ", # cmp)
148 static void print_guid(ff_asf_guid *g)
151 PRINT_IF_GUID(g, ff_asf_header);
152 else PRINT_IF_GUID(g, ff_asf_file_header);
153 else PRINT_IF_GUID(g, ff_asf_stream_header);
154 else PRINT_IF_GUID(g, ff_asf_audio_stream);
155 else PRINT_IF_GUID(g, ff_asf_audio_conceal_none);
156 else PRINT_IF_GUID(g, ff_asf_video_stream);
157 else PRINT_IF_GUID(g, ff_asf_video_conceal_none);
158 else PRINT_IF_GUID(g, ff_asf_command_stream);
159 else PRINT_IF_GUID(g, ff_asf_comment_header);
160 else PRINT_IF_GUID(g, ff_asf_codec_comment_header);
161 else PRINT_IF_GUID(g, ff_asf_codec_comment1_header);
162 else PRINT_IF_GUID(g, ff_asf_data_header);
163 else PRINT_IF_GUID(g, ff_asf_simple_index_header);
164 else PRINT_IF_GUID(g, ff_asf_head1_guid);
165 else PRINT_IF_GUID(g, ff_asf_head2_guid);
166 else PRINT_IF_GUID(g, ff_asf_my_guid);
167 else PRINT_IF_GUID(g, ff_asf_ext_stream_header);
168 else PRINT_IF_GUID(g, ff_asf_extended_content_header);
169 else PRINT_IF_GUID(g, ff_asf_ext_stream_embed_stream_header);
170 else PRINT_IF_GUID(g, ff_asf_ext_stream_audio_stream);
171 else PRINT_IF_GUID(g, ff_asf_metadata_header);
172 else PRINT_IF_GUID(g, ff_asf_metadata_library_header);
173 else PRINT_IF_GUID(g, ff_asf_marker_header);
174 else PRINT_IF_GUID(g, stream_bitrate_guid);
175 else PRINT_IF_GUID(g, ff_asf_language_guid);
177 av_log(NULL, AV_LOG_TRACE, "(GUID: unknown) ");
178 for (i = 0; i < 16; i++)
179 av_log(NULL, AV_LOG_TRACE, " 0x%02x,", (*g)[i]);
180 av_log(NULL, AV_LOG_TRACE, "}\n");
184 #define print_guid(g) while(0)
187 static int asf_probe(AVProbeData *pd)
189 /* check file header */
190 if (!ff_guidcmp(pd->buf, &ff_asf_header))
191 return AVPROBE_SCORE_MAX;
196 /* size of type 2 (BOOL) is 32bit for "Extended Content Description Object"
197 * but 16 bit for "Metadata Object" and "Metadata Library Object" */
198 static int get_value(AVIOContext *pb, int type, int type2_size)
202 return (type2_size == 32) ? avio_rl32(pb) : avio_rl16(pb);
204 return avio_rl32(pb);
206 return avio_rl64(pb);
208 return avio_rl16(pb);
214 /* MSDN claims that this should be "compatible with the ID3 frame, APIC",
215 * but in reality this is only loosely similar */
216 static int asf_read_picture(AVFormatContext *s, int len)
218 AVPacket pkt = { 0 };
219 const CodecMime *mime = ff_id3v2_mime_tags;
220 enum AVCodecID id = AV_CODEC_ID_NONE;
222 uint8_t *desc = NULL;
224 int ret, type, picsize, desc_len;
226 /* type + picsize + mime + desc */
227 if (len < 1 + 4 + 2 + 2) {
228 av_log(s, AV_LOG_ERROR, "Invalid attached picture size: %d.\n", len);
229 return AVERROR_INVALIDDATA;
233 type = avio_r8(s->pb);
235 if (type >= FF_ARRAY_ELEMS(ff_id3v2_picture_types) || type < 0) {
236 av_log(s, AV_LOG_WARNING, "Unknown attached picture type: %d.\n", type);
240 /* picture data size */
241 picsize = avio_rl32(s->pb);
244 /* picture MIME type */
245 len -= avio_get_str16le(s->pb, len, mimetype, sizeof(mimetype));
246 while (mime->id != AV_CODEC_ID_NONE) {
247 if (!strncmp(mime->str, mimetype, sizeof(mimetype))) {
253 if (id == AV_CODEC_ID_NONE) {
254 av_log(s, AV_LOG_ERROR, "Unknown attached picture mimetype: %s.\n",
259 if (picsize >= len) {
260 av_log(s, AV_LOG_ERROR, "Invalid attached picture data size: %d >= %d.\n",
262 return AVERROR_INVALIDDATA;
265 /* picture description */
266 desc_len = (len - picsize) * 2 + 1;
267 desc = av_malloc(desc_len);
269 return AVERROR(ENOMEM);
270 len -= avio_get_str16le(s->pb, len - picsize, desc, desc_len);
272 ret = av_get_packet(s->pb, &pkt, picsize);
276 st = avformat_new_stream(s, NULL);
278 ret = AVERROR(ENOMEM);
281 st->disposition |= AV_DISPOSITION_ATTACHED_PIC;
282 st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
283 st->codec->codec_id = id;
284 st->attached_pic = pkt;
285 st->attached_pic.stream_index = st->index;
286 st->attached_pic.flags |= AV_PKT_FLAG_KEY;
289 av_dict_set(&st->metadata, "title", desc, AV_DICT_DONT_STRDUP_VAL);
293 av_dict_set(&st->metadata, "comment", ff_id3v2_picture_types[type], 0);
299 av_free_packet(&pkt);
303 static void get_id3_tag(AVFormatContext *s, int len)
305 ID3v2ExtraMeta *id3v2_extra_meta = NULL;
307 ff_id3v2_read(s, ID3v2_DEFAULT_MAGIC, &id3v2_extra_meta, len);
308 if (id3v2_extra_meta)
309 ff_id3v2_parse_apic(s, &id3v2_extra_meta);
310 ff_id3v2_free_extra_meta(&id3v2_extra_meta);
313 static void get_tag(AVFormatContext *s, const char *key, int type, int len, int type2_size)
315 ASFContext *asf = s->priv_data;
317 int64_t off = avio_tell(s->pb);
320 if ((unsigned)len >= (UINT_MAX - LEN) / 2)
323 if (!asf->export_xmp && !strncmp(key, "xmp", 3))
326 value = av_malloc(2 * len + LEN);
332 avio_get_str16le(s->pb, len, value, 2 * len + 1);
335 avio_read(s->pb, value, len);
339 if (!strcmp(key, "WM/Picture")) { // handle cover art
340 asf_read_picture(s, len);
341 } else if (!strcmp(key, "ID3")) { // handle ID3 tag
344 av_log(s, AV_LOG_VERBOSE, "Unsupported byte array in tag %s.\n", key);
351 uint64_t num = get_value(s->pb, type, type2_size);
352 snprintf(value, LEN, "%"PRIu64, num);
356 av_log(s, AV_LOG_DEBUG, "Unsupported GUID value in tag %s.\n", key);
359 av_log(s, AV_LOG_DEBUG,
360 "Unsupported value type %d in tag %s.\n", type, key);
364 av_dict_set(&s->metadata, key, value, 0);
368 avio_seek(s->pb, off + len, SEEK_SET);
371 static int asf_read_file_properties(AVFormatContext *s, int64_t size)
373 ASFContext *asf = s->priv_data;
374 AVIOContext *pb = s->pb;
376 ff_get_guid(pb, &asf->hdr.guid);
377 asf->hdr.file_size = avio_rl64(pb);
378 asf->hdr.create_time = avio_rl64(pb);
379 avio_rl64(pb); /* number of packets */
380 asf->hdr.play_time = avio_rl64(pb);
381 asf->hdr.send_time = avio_rl64(pb);
382 asf->hdr.preroll = avio_rl32(pb);
383 asf->hdr.ignore = avio_rl32(pb);
384 asf->hdr.flags = avio_rl32(pb);
385 asf->hdr.min_pktsize = avio_rl32(pb);
386 asf->hdr.max_pktsize = avio_rl32(pb);
387 if (asf->hdr.min_pktsize >= (1U << 29))
388 return AVERROR_INVALIDDATA;
389 asf->hdr.max_bitrate = avio_rl32(pb);
390 s->packet_size = asf->hdr.max_pktsize;
395 static int asf_read_stream_properties(AVFormatContext *s, int64_t size)
397 ASFContext *asf = s->priv_data;
398 AVIOContext *pb = s->pb;
402 enum AVMediaType type;
403 int type_specific_size, sizeX;
405 int64_t pos1, pos2, start_time;
406 int test_for_ext_stream_audio, is_dvr_ms_audio = 0;
408 if (s->nb_streams == ASF_MAX_STREAMS) {
409 av_log(s, AV_LOG_ERROR, "too many streams\n");
410 return AVERROR(EINVAL);
413 pos1 = avio_tell(pb);
415 st = avformat_new_stream(s, NULL);
417 return AVERROR(ENOMEM);
418 avpriv_set_pts_info(st, 32, 1, 1000); /* 32 bit pts in ms */
419 start_time = asf->hdr.preroll;
421 if (!(asf->hdr.flags & 0x01)) { // if we aren't streaming...
422 int64_t fsize = avio_size(pb);
423 if (fsize <= 0 || (int64_t)asf->hdr.file_size <= 0 ||
424 20*FFABS(fsize - (int64_t)asf->hdr.file_size) < FFMIN(fsize, asf->hdr.file_size))
425 st->duration = asf->hdr.play_time /
426 (10000000 / 1000) - start_time;
430 test_for_ext_stream_audio = 0;
431 if (!ff_guidcmp(&g, &ff_asf_audio_stream)) {
432 type = AVMEDIA_TYPE_AUDIO;
433 } else if (!ff_guidcmp(&g, &ff_asf_video_stream)) {
434 type = AVMEDIA_TYPE_VIDEO;
435 } else if (!ff_guidcmp(&g, &ff_asf_jfif_media)) {
436 type = AVMEDIA_TYPE_VIDEO;
437 st->codec->codec_id = AV_CODEC_ID_MJPEG;
438 } else if (!ff_guidcmp(&g, &ff_asf_command_stream)) {
439 type = AVMEDIA_TYPE_DATA;
440 } else if (!ff_guidcmp(&g, &ff_asf_ext_stream_embed_stream_header)) {
441 test_for_ext_stream_audio = 1;
442 type = AVMEDIA_TYPE_UNKNOWN;
447 avio_skip(pb, 8); /* total_size */
448 type_specific_size = avio_rl32(pb);
450 st->id = avio_rl16(pb) & 0x7f; /* stream id */
451 // mapping of asf ID to AV stream ID;
452 asf->asfid2avid[st->id] = s->nb_streams - 1;
453 asf_st = &asf->streams[st->id];
457 if (test_for_ext_stream_audio) {
459 if (!ff_guidcmp(&g, &ff_asf_ext_stream_audio_stream)) {
460 type = AVMEDIA_TYPE_AUDIO;
471 st->codec->codec_type = type;
472 if (type == AVMEDIA_TYPE_AUDIO) {
473 int ret = ff_get_wav_header(s, pb, st->codec, type_specific_size, 0);
476 if (is_dvr_ms_audio) {
477 // codec_id and codec_tag are unreliable in dvr_ms
478 // files. Set them later by probing stream.
479 st->request_probe = 1;
480 st->codec->codec_tag = 0;
482 if (st->codec->codec_id == AV_CODEC_ID_AAC)
483 st->need_parsing = AVSTREAM_PARSE_NONE;
485 st->need_parsing = AVSTREAM_PARSE_FULL;
486 /* We have to init the frame size at some point .... */
487 pos2 = avio_tell(pb);
488 if (size >= (pos2 + 8 - pos1 + 24)) {
489 asf_st->ds_span = avio_r8(pb);
490 asf_st->ds_packet_size = avio_rl16(pb);
491 asf_st->ds_chunk_size = avio_rl16(pb);
492 avio_rl16(pb); // ds_data_size
493 avio_r8(pb); // ds_silence_data
495 if (asf_st->ds_span > 1) {
496 if (!asf_st->ds_chunk_size ||
497 (asf_st->ds_packet_size / asf_st->ds_chunk_size <= 1) ||
498 asf_st->ds_packet_size % asf_st->ds_chunk_size)
499 asf_st->ds_span = 0; // disable descrambling
501 } else if (type == AVMEDIA_TYPE_VIDEO &&
502 size - (avio_tell(pb) - pos1 + 24) >= 51) {
506 avio_rl16(pb); /* size */
507 sizeX = avio_rl32(pb); /* size */
508 st->codec->width = avio_rl32(pb);
509 st->codec->height = avio_rl32(pb);
510 /* not available for asf */
511 avio_rl16(pb); /* panes */
512 st->codec->bits_per_coded_sample = avio_rl16(pb); /* depth */
513 tag1 = avio_rl32(pb);
516 st->codec->extradata_size = ffio_limit(pb, sizeX - 40);
517 st->codec->extradata = av_mallocz(st->codec->extradata_size +
518 FF_INPUT_BUFFER_PADDING_SIZE);
519 if (!st->codec->extradata)
520 return AVERROR(ENOMEM);
521 avio_read(pb, st->codec->extradata, st->codec->extradata_size);
524 /* Extract palette from extradata if bpp <= 8 */
525 /* This code assumes that extradata contains only palette */
526 /* This is true for all paletted codecs implemented in libavcodec */
527 if (st->codec->extradata_size && (st->codec->bits_per_coded_sample <= 8)) {
530 for (i = 0; i < FFMIN(st->codec->extradata_size, AVPALETTE_SIZE) / 4; i++)
531 asf_st->palette[i] = av_bswap32(((uint32_t *)st->codec->extradata)[i]);
533 memcpy(asf_st->palette, st->codec->extradata,
534 FFMIN(st->codec->extradata_size, AVPALETTE_SIZE));
536 asf_st->palette_changed = 1;
539 st->codec->codec_tag = tag1;
540 st->codec->codec_id = ff_codec_get_id(ff_codec_bmp_tags, tag1);
541 if (tag1 == MKTAG('D', 'V', 'R', ' ')) {
542 st->need_parsing = AVSTREAM_PARSE_FULL;
543 /* issue658 contains wrong w/h and MS even puts a fake seq header
544 * with wrong w/h in extradata while a correct one is in the stream.
545 * maximum lameness */
547 st->codec->height = 0;
548 av_freep(&st->codec->extradata);
549 st->codec->extradata_size = 0;
551 if (st->codec->codec_id == AV_CODEC_ID_H264)
552 st->need_parsing = AVSTREAM_PARSE_FULL_ONCE;
553 if (st->codec->codec_id == AV_CODEC_ID_MPEG4)
554 st->need_parsing = AVSTREAM_PARSE_FULL_ONCE;
556 pos2 = avio_tell(pb);
557 avio_skip(pb, size - (pos2 - pos1 + 24));
562 static int asf_read_ext_stream_properties(AVFormatContext *s, int64_t size)
564 ASFContext *asf = s->priv_data;
565 AVIOContext *pb = s->pb;
567 int ext_len, payload_ext_ct, stream_ct, i;
568 uint32_t leak_rate, stream_num;
569 unsigned int stream_languageid_index;
571 avio_rl64(pb); // starttime
572 avio_rl64(pb); // endtime
573 leak_rate = avio_rl32(pb); // leak-datarate
574 avio_rl32(pb); // bucket-datasize
575 avio_rl32(pb); // init-bucket-fullness
576 avio_rl32(pb); // alt-leak-datarate
577 avio_rl32(pb); // alt-bucket-datasize
578 avio_rl32(pb); // alt-init-bucket-fullness
579 avio_rl32(pb); // max-object-size
580 avio_rl32(pb); // flags (reliable,seekable,no_cleanpoints?,resend-live-cleanpoints, rest of bits reserved)
581 stream_num = avio_rl16(pb); // stream-num
583 stream_languageid_index = avio_rl16(pb); // stream-language-id-index
584 if (stream_num < 128)
585 asf->streams[stream_num].stream_language_index = stream_languageid_index;
587 avio_rl64(pb); // avg frametime in 100ns units
588 stream_ct = avio_rl16(pb); // stream-name-count
589 payload_ext_ct = avio_rl16(pb); // payload-extension-system-count
591 if (stream_num < 128) {
592 asf->stream_bitrates[stream_num] = leak_rate;
593 asf->streams[stream_num].payload_ext_ct = 0;
596 for (i = 0; i < stream_ct; i++) {
598 ext_len = avio_rl16(pb);
599 avio_skip(pb, ext_len);
602 for (i = 0; i < payload_ext_ct; i++) {
605 size = avio_rl16(pb);
606 ext_len = avio_rl32(pb);
607 avio_skip(pb, ext_len);
608 if (stream_num < 128 && i < FF_ARRAY_ELEMS(asf->streams[stream_num].payload)) {
609 ASFPayload *p = &asf->streams[stream_num].payload[i];
612 av_log(s, AV_LOG_DEBUG, "Payload extension %x %d\n", g[0], p->size );
613 asf->streams[stream_num].payload_ext_ct ++;
620 static int asf_read_content_desc(AVFormatContext *s, int64_t size)
622 AVIOContext *pb = s->pb;
623 int len1, len2, len3, len4, len5;
625 len1 = avio_rl16(pb);
626 len2 = avio_rl16(pb);
627 len3 = avio_rl16(pb);
628 len4 = avio_rl16(pb);
629 len5 = avio_rl16(pb);
630 get_tag(s, "title", 0, len1, 32);
631 get_tag(s, "author", 0, len2, 32);
632 get_tag(s, "copyright", 0, len3, 32);
633 get_tag(s, "comment", 0, len4, 32);
639 static int asf_read_ext_content_desc(AVFormatContext *s, int64_t size)
641 AVIOContext *pb = s->pb;
642 ASFContext *asf = s->priv_data;
643 int desc_count, i, ret;
645 desc_count = avio_rl16(pb);
646 for (i = 0; i < desc_count; i++) {
647 int name_len, value_type, value_len;
650 name_len = avio_rl16(pb);
651 if (name_len % 2) // must be even, broken lavf versions wrote len-1
653 if ((ret = avio_get_str16le(pb, name_len, name, sizeof(name))) < name_len)
654 avio_skip(pb, name_len - ret);
655 value_type = avio_rl16(pb);
656 value_len = avio_rl16(pb);
657 if (!value_type && value_len % 2)
659 /* My sample has that stream set to 0 maybe that mean the container.
660 * ASF stream count starts at 1. I am using 0 to the container value
661 * since it's unused. */
662 if (!strcmp(name, "AspectRatioX"))
663 asf->dar[0].num = get_value(s->pb, value_type, 32);
664 else if (!strcmp(name, "AspectRatioY"))
665 asf->dar[0].den = get_value(s->pb, value_type, 32);
667 get_tag(s, name, value_type, value_len, 32);
673 static int asf_read_language_list(AVFormatContext *s, int64_t size)
675 AVIOContext *pb = s->pb;
676 ASFContext *asf = s->priv_data;
678 int stream_count = avio_rl16(pb);
679 for (j = 0; j < stream_count; j++) {
681 unsigned int lang_len = avio_r8(pb);
682 if ((ret = avio_get_str16le(pb, lang_len, lang,
683 sizeof(lang))) < lang_len)
684 avio_skip(pb, lang_len - ret);
686 av_strlcpy(asf->stream_languages[j], lang,
687 sizeof(*asf->stream_languages));
693 static int asf_read_metadata(AVFormatContext *s, int64_t size)
695 AVIOContext *pb = s->pb;
696 ASFContext *asf = s->priv_data;
697 int n, stream_num, name_len_utf16, name_len_utf8, value_len;
701 for (i = 0; i < n; i++) {
705 avio_rl16(pb); // lang_list_index
706 stream_num = avio_rl16(pb);
707 name_len_utf16 = avio_rl16(pb);
708 value_type = avio_rl16(pb); /* value_type */
709 value_len = avio_rl32(pb);
711 name_len_utf8 = 2*name_len_utf16 + 1;
712 name = av_malloc(name_len_utf8);
714 return AVERROR(ENOMEM);
716 if ((ret = avio_get_str16le(pb, name_len_utf16, name, name_len_utf8)) < name_len_utf16)
717 avio_skip(pb, name_len_utf16 - ret);
718 av_log(s, AV_LOG_TRACE, "%d stream %d name_len %2d type %d len %4d <%s>\n",
719 i, stream_num, name_len_utf16, value_type, value_len, name);
721 if (!strcmp(name, "AspectRatioX")){
722 int aspect_x = get_value(s->pb, value_type, 16);
724 asf->dar[stream_num].num = aspect_x;
725 } else if(!strcmp(name, "AspectRatioY")){
726 int aspect_y = get_value(s->pb, value_type, 16);
728 asf->dar[stream_num].den = aspect_y;
730 get_tag(s, name, value_type, value_len, 16);
738 static int asf_read_marker(AVFormatContext *s, int64_t size)
740 AVIOContext *pb = s->pb;
741 ASFContext *asf = s->priv_data;
742 int i, count, name_len, ret;
745 avio_rl64(pb); // reserved 16 bytes
746 avio_rl64(pb); // ...
747 count = avio_rl32(pb); // markers count
748 avio_rl16(pb); // reserved 2 bytes
749 name_len = avio_rl16(pb); // name length
750 for (i = 0; i < name_len; i++)
751 avio_r8(pb); // skip the name
753 for (i = 0; i < count; i++) {
757 avio_rl64(pb); // offset, 8 bytes
758 pres_time = avio_rl64(pb); // presentation time
759 pres_time -= asf->hdr.preroll * 10000;
760 avio_rl16(pb); // entry length
761 avio_rl32(pb); // send time
762 avio_rl32(pb); // flags
763 name_len = avio_rl32(pb); // name length
764 if ((ret = avio_get_str16le(pb, name_len * 2, name,
765 sizeof(name))) < name_len)
766 avio_skip(pb, name_len - ret);
767 avpriv_new_chapter(s, i, (AVRational) { 1, 10000000 }, pres_time,
768 AV_NOPTS_VALUE, name);
774 static int asf_read_header(AVFormatContext *s)
776 ASFContext *asf = s->priv_data;
778 AVIOContext *pb = s->pb;
783 if (ff_guidcmp(&g, &ff_asf_header))
784 return AVERROR_INVALIDDATA;
789 memset(&asf->asfid2avid, -1, sizeof(asf->asfid2avid));
791 for (i = 0; i<128; i++)
792 asf->streams[i].stream_language_index = 128; // invalid stream index means no language info
795 uint64_t gpos = avio_tell(pb);
798 gsize = avio_rl64(pb);
800 if (!ff_guidcmp(&g, &ff_asf_data_header)) {
801 asf->data_object_offset = avio_tell(pb);
802 /* If not streaming, gsize is not unlimited (how?),
803 * and there is enough space in the file.. */
804 if (!(asf->hdr.flags & 0x01) && gsize >= 100)
805 asf->data_object_size = gsize - 24;
807 asf->data_object_size = (uint64_t)-1;
811 return AVERROR_INVALIDDATA;
812 if (!ff_guidcmp(&g, &ff_asf_file_header)) {
813 ret = asf_read_file_properties(s, gsize);
814 } else if (!ff_guidcmp(&g, &ff_asf_stream_header)) {
815 ret = asf_read_stream_properties(s, gsize);
816 } else if (!ff_guidcmp(&g, &ff_asf_comment_header)) {
817 asf_read_content_desc(s, gsize);
818 } else if (!ff_guidcmp(&g, &ff_asf_language_guid)) {
819 asf_read_language_list(s, gsize);
820 } else if (!ff_guidcmp(&g, &ff_asf_extended_content_header)) {
821 asf_read_ext_content_desc(s, gsize);
822 } else if (!ff_guidcmp(&g, &ff_asf_metadata_header)) {
823 asf_read_metadata(s, gsize);
824 } else if (!ff_guidcmp(&g, &ff_asf_metadata_library_header)) {
825 asf_read_metadata(s, gsize);
826 } else if (!ff_guidcmp(&g, &ff_asf_ext_stream_header)) {
827 asf_read_ext_stream_properties(s, gsize);
829 // there could be a optional stream properties object to follow
830 // if so the next iteration will pick it up
832 } else if (!ff_guidcmp(&g, &ff_asf_head1_guid)) {
836 } else if (!ff_guidcmp(&g, &ff_asf_marker_header)) {
837 asf_read_marker(s, gsize);
838 } else if (avio_feof(pb)) {
842 if (!ff_guidcmp(&g, &ff_asf_content_encryption)) {
845 av_log(s, AV_LOG_WARNING,
846 "DRM protected stream detected, decoding will likely fail!\n");
848 av_log(s, AV_LOG_DEBUG, "Secret data:\n");
850 if ((ret = av_get_packet(pb, &pkt, len)) < 0)
852 av_hex_dump_log(s, AV_LOG_DEBUG, pkt.data, pkt.size);
853 av_free_packet(&pkt);
855 get_tag(s, "ASF_Protection_Type", -1, len, 32);
857 get_tag(s, "ASF_Key_ID", -1, len, 32);
859 get_tag(s, "ASF_License_URL", -1, len, 32);
860 } else if (!ff_guidcmp(&g, &ff_asf_ext_content_encryption)) {
861 av_log(s, AV_LOG_WARNING,
862 "Ext DRM protected stream detected, decoding will likely fail!\n");
863 av_dict_set(&s->metadata, "encryption", "ASF Extended Content Encryption", 0);
864 } else if (!ff_guidcmp(&g, &ff_asf_digital_signature)) {
865 av_log(s, AV_LOG_INFO, "Digital signature detected!\n");
872 if (avio_tell(pb) != gpos + gsize)
873 av_log(s, AV_LOG_DEBUG,
874 "gpos mismatch our pos=%"PRIu64", end=%"PRId64"\n",
875 avio_tell(pb) - gpos, gsize);
876 avio_seek(pb, gpos + gsize, SEEK_SET);
884 asf->data_offset = avio_tell(pb);
885 asf->packet_size_left = 0;
887 for (i = 0; i < 128; i++) {
888 int stream_num = asf->asfid2avid[i];
889 if (stream_num >= 0) {
890 AVStream *st = s->streams[stream_num];
891 if (!st->codec->bit_rate)
892 st->codec->bit_rate = asf->stream_bitrates[i];
893 if (asf->dar[i].num > 0 && asf->dar[i].den > 0) {
894 av_reduce(&st->sample_aspect_ratio.num,
895 &st->sample_aspect_ratio.den,
896 asf->dar[i].num, asf->dar[i].den, INT_MAX);
897 } else if ((asf->dar[0].num > 0) && (asf->dar[0].den > 0) &&
898 // Use ASF container value if the stream doesn't set AR.
899 (st->codec->codec_type == AVMEDIA_TYPE_VIDEO))
900 av_reduce(&st->sample_aspect_ratio.num,
901 &st->sample_aspect_ratio.den,
902 asf->dar[0].num, asf->dar[0].den, INT_MAX);
904 av_log(s, AV_LOG_TRACE, "i=%d, st->codec->codec_type:%d, asf->dar %d:%d sar=%d:%d\n",
905 i, st->codec->codec_type, asf->dar[i].num, asf->dar[i].den,
906 st->sample_aspect_ratio.num, st->sample_aspect_ratio.den);
908 // copy and convert language codes to the frontend
909 if (asf->streams[i].stream_language_index < 128) {
910 const char *rfc1766 = asf->stream_languages[asf->streams[i].stream_language_index];
911 if (rfc1766 && strlen(rfc1766) > 1) {
912 const char primary_tag[3] = { rfc1766[0], rfc1766[1], '\0' }; // ignore country code if any
913 const char *iso6392 = av_convert_lang_to(primary_tag,
914 AV_LANG_ISO639_2_BIBL);
916 av_dict_set(&st->metadata, "language", iso6392, 0);
922 ff_metadata_conv(&s->metadata, NULL, ff_asf_metadata_conv);
927 #define DO_2BITS(bits, var, defval) \
928 switch (bits & 3) { \
930 var = avio_rl32(pb); \
934 var = avio_rl16(pb); \
947 * Load a single ASF packet into the demuxer.
948 * @param s demux context
949 * @param pb context to read data from
950 * @return 0 on success, <0 on error
952 static int asf_get_packet(AVFormatContext *s, AVIOContext *pb)
954 ASFContext *asf = s->priv_data;
955 uint32_t packet_length, padsize;
959 // if we do not know packet size, allow skipping up to 32 kB
961 if (asf->no_resync_search)
963 else if (s->packet_size > 0)
964 off = (avio_tell(pb) - s->internal->data_offset) % s->packet_size + 3;
971 if (c == 0x82 && !d && !e)
976 /* This code allows handling of -EAGAIN at packet boundaries (i.e.
977 * if the packet sync code above triggers -EAGAIN). This does not
978 * imply complete -EAGAIN handling support at random positions in
980 if (pb->error == AVERROR(EAGAIN))
981 return AVERROR(EAGAIN);
983 av_log(s, AV_LOG_ERROR,
984 "ff asf bad header %x at:%"PRId64"\n", c, avio_tell(pb));
986 if ((c & 0x8f) == 0x82) {
989 av_log(s, AV_LOG_ERROR, "ff asf bad non zero\n");
990 return AVERROR_INVALIDDATA;
995 } else if(!avio_feof(pb)) {
996 avio_seek(pb, -1, SEEK_CUR); // FIXME
999 asf->packet_flags = c;
1000 asf->packet_property = d;
1002 DO_2BITS(asf->packet_flags >> 5, packet_length, s->packet_size);
1003 DO_2BITS(asf->packet_flags >> 1, padsize, 0); // sequence ignored
1004 DO_2BITS(asf->packet_flags >> 3, padsize, 0); // padding length
1006 // the following checks prevent overflows and infinite loops
1007 if (!packet_length || packet_length >= (1U << 29)) {
1008 av_log(s, AV_LOG_ERROR,
1009 "invalid packet_length %"PRIu32" at:%"PRId64"\n",
1010 packet_length, avio_tell(pb));
1011 return AVERROR_INVALIDDATA;
1013 if (padsize >= packet_length) {
1014 av_log(s, AV_LOG_ERROR,
1015 "invalid padsize %"PRIu32" at:%"PRId64"\n", padsize, avio_tell(pb));
1016 return AVERROR_INVALIDDATA;
1019 asf->packet_timestamp = avio_rl32(pb);
1020 avio_rl16(pb); /* duration */
1021 // rsize has at least 11 bytes which have to be present
1023 if (asf->packet_flags & 0x01) {
1024 asf->packet_segsizetype = avio_r8(pb);
1026 asf->packet_segments = asf->packet_segsizetype & 0x3f;
1028 asf->packet_segments = 1;
1029 asf->packet_segsizetype = 0x80;
1031 if (rsize > packet_length - padsize) {
1032 asf->packet_size_left = 0;
1033 av_log(s, AV_LOG_ERROR,
1034 "invalid packet header length %d for pktlen %"PRIu32"-%"PRIu32" at %"PRId64"\n",
1035 rsize, packet_length, padsize, avio_tell(pb));
1036 return AVERROR_INVALIDDATA;
1038 asf->packet_size_left = packet_length - padsize - rsize;
1039 if (packet_length < asf->hdr.min_pktsize)
1040 padsize += asf->hdr.min_pktsize - packet_length;
1041 asf->packet_padsize = padsize;
1042 av_log(s, AV_LOG_TRACE, "packet: size=%d padsize=%d left=%d\n",
1043 s->packet_size, asf->packet_padsize, asf->packet_size_left);
1049 * @return <0 if error
1051 static int asf_read_frame_header(AVFormatContext *s, AVIOContext *pb)
1053 ASFContext *asf = s->priv_data;
1056 int num = avio_r8(pb);
1058 int64_t ts0, ts1 av_unused;
1060 asf->packet_segments--;
1061 asf->packet_key_frame = num >> 7;
1062 asf->stream_index = asf->asfid2avid[num & 0x7f];
1063 asfst = &asf->streams[num & 0x7f];
1064 // sequence should be ignored!
1065 DO_2BITS(asf->packet_property >> 4, asf->packet_seq, 0);
1066 DO_2BITS(asf->packet_property >> 2, asf->packet_frag_offset, 0);
1067 DO_2BITS(asf->packet_property, asf->packet_replic_size, 0);
1068 av_log(asf, AV_LOG_TRACE, "key:%d stream:%d seq:%d offset:%d replic_size:%d\n",
1069 asf->packet_key_frame, asf->stream_index, asf->packet_seq,
1070 asf->packet_frag_offset, asf->packet_replic_size);
1071 if (rsize+(int64_t)asf->packet_replic_size > asf->packet_size_left) {
1072 av_log(s, AV_LOG_ERROR, "packet_replic_size %d is invalid\n", asf->packet_replic_size);
1073 return AVERROR_INVALIDDATA;
1075 if (asf->packet_replic_size >= 8) {
1076 int64_t end = avio_tell(pb) + asf->packet_replic_size;
1078 asfst->packet_obj_size = avio_rl32(pb);
1079 if (asfst->packet_obj_size >= (1 << 24) || asfst->packet_obj_size < 0) {
1080 av_log(s, AV_LOG_ERROR, "packet_obj_size %d invalid\n", asfst->packet_obj_size);
1081 asfst->packet_obj_size = 0;
1082 return AVERROR_INVALIDDATA;
1084 asf->packet_frag_timestamp = avio_rl32(pb); // timestamp
1086 for (i = 0; i < asfst->payload_ext_ct; i++) {
1087 ASFPayload *p = &asfst->payload[i];
1091 size = avio_rl16(pb);
1092 payend = avio_tell(pb) + size;
1094 av_log(s, AV_LOG_ERROR, "too long payload\n");
1099 // duration = avio_rl16(pb);
1102 aspect.num = avio_r8(pb);
1103 aspect.den = avio_r8(pb);
1104 if (aspect.num > 0 && aspect.den > 0 && asf->stream_index >= 0) {
1105 s->streams[asf->stream_index]->sample_aspect_ratio = aspect;
1110 ts0 = avio_rl64(pb);
1111 ts1 = avio_rl64(pb);
1112 if (ts0!= -1) asf->packet_frag_timestamp = ts0/10000;
1113 else asf->packet_frag_timestamp = AV_NOPTS_VALUE;
1124 avio_seek(pb, payend, SEEK_SET);
1127 avio_seek(pb, end, SEEK_SET);
1128 rsize += asf->packet_replic_size; // FIXME - check validity
1129 } else if (asf->packet_replic_size == 1) {
1130 // multipacket - frag_offset is beginning timestamp
1131 asf->packet_time_start = asf->packet_frag_offset;
1132 asf->packet_frag_offset = 0;
1133 asf->packet_frag_timestamp = asf->packet_timestamp;
1135 asf->packet_time_delta = avio_r8(pb);
1137 } else if (asf->packet_replic_size != 0) {
1138 av_log(s, AV_LOG_ERROR, "unexpected packet_replic_size of %d\n",
1139 asf->packet_replic_size);
1140 return AVERROR_INVALIDDATA;
1142 if (asf->packet_flags & 0x01) {
1143 DO_2BITS(asf->packet_segsizetype >> 6, asf->packet_frag_size, 0); // 0 is illegal
1144 if (rsize > asf->packet_size_left) {
1145 av_log(s, AV_LOG_ERROR, "packet_replic_size is invalid\n");
1146 return AVERROR_INVALIDDATA;
1147 } else if (asf->packet_frag_size > asf->packet_size_left - rsize) {
1148 if (asf->packet_frag_size > asf->packet_size_left - rsize + asf->packet_padsize) {
1149 av_log(s, AV_LOG_ERROR, "packet_frag_size is invalid (%d-%d)\n",
1150 asf->packet_size_left, rsize);
1151 return AVERROR_INVALIDDATA;
1153 int diff = asf->packet_frag_size - (asf->packet_size_left - rsize);
1154 asf->packet_size_left += diff;
1155 asf->packet_padsize -= diff;
1159 asf->packet_frag_size = asf->packet_size_left - rsize;
1161 if (asf->packet_replic_size == 1) {
1162 asf->packet_multi_size = asf->packet_frag_size;
1163 if (asf->packet_multi_size > asf->packet_size_left)
1164 return AVERROR_INVALIDDATA;
1166 asf->packet_size_left -= rsize;
1172 * Parse data from individual ASF packets (which were previously loaded
1173 * with asf_get_packet()).
1174 * @param s demux context
1175 * @param pb context to read data from
1176 * @param pkt pointer to store packet data into
1177 * @return 0 if data was stored in pkt, <0 on error or 1 if more ASF
1178 * packets need to be loaded (through asf_get_packet())
1180 static int asf_parse_packet(AVFormatContext *s, AVIOContext *pb, AVPacket *pkt)
1182 ASFContext *asf = s->priv_data;
1183 ASFStream *asf_st = 0;
1188 if (asf->packet_size_left < FRAME_HEADER_SIZE ||
1189 asf->packet_segments < 1 && asf->packet_time_start == 0) {
1190 int ret = asf->packet_size_left + asf->packet_padsize;
1192 if (asf->packet_size_left && asf->packet_size_left < FRAME_HEADER_SIZE)
1193 av_log(s, AV_LOG_WARNING, "Skip due to FRAME_HEADER_SIZE\n");
1199 asf->packet_pos = avio_tell(pb);
1200 if (asf->data_object_size != (uint64_t)-1 &&
1201 (asf->packet_pos - asf->data_object_offset >= asf->data_object_size))
1202 return AVERROR_EOF; /* Do not exceed the size of the data object */
1205 if (asf->packet_time_start == 0) {
1206 if (asf_read_frame_header(s, pb) < 0) {
1207 asf->packet_time_start = asf->packet_segments = 0;
1210 if (asf->stream_index < 0 ||
1211 s->streams[asf->stream_index]->discard >= AVDISCARD_ALL ||
1212 (!asf->packet_key_frame &&
1213 (s->streams[asf->stream_index]->discard >= AVDISCARD_NONKEY || asf->streams[s->streams[asf->stream_index]->id].skip_to_key))) {
1214 asf->packet_time_start = 0;
1215 /* unhandled packet (should not happen) */
1216 avio_skip(pb, asf->packet_frag_size);
1217 asf->packet_size_left -= asf->packet_frag_size;
1218 if (asf->stream_index < 0)
1219 av_log(s, AV_LOG_ERROR, "ff asf skip %d (unknown stream)\n",
1220 asf->packet_frag_size);
1223 asf->asf_st = &asf->streams[s->streams[asf->stream_index]->id];
1224 if (!asf->packet_frag_offset)
1225 asf->asf_st->skip_to_key = 0;
1227 asf_st = asf->asf_st;
1230 if (!asf_st->frag_offset && asf->packet_frag_offset) {
1231 av_log(s, AV_LOG_TRACE, "skipping asf data pkt with fragment offset for "
1232 "stream:%d, expected:%d but got %d from pkt)\n",
1233 asf->stream_index, asf_st->frag_offset,
1234 asf->packet_frag_offset);
1235 avio_skip(pb, asf->packet_frag_size);
1236 asf->packet_size_left -= asf->packet_frag_size;
1240 if (asf->packet_replic_size == 1) {
1241 // frag_offset is here used as the beginning timestamp
1242 asf->packet_frag_timestamp = asf->packet_time_start;
1243 asf->packet_time_start += asf->packet_time_delta;
1244 asf_st->packet_obj_size = asf->packet_frag_size = avio_r8(pb);
1245 asf->packet_size_left--;
1246 asf->packet_multi_size--;
1247 if (asf->packet_multi_size < asf_st->packet_obj_size) {
1248 asf->packet_time_start = 0;
1249 avio_skip(pb, asf->packet_multi_size);
1250 asf->packet_size_left -= asf->packet_multi_size;
1253 asf->packet_multi_size -= asf_st->packet_obj_size;
1256 if (asf_st->pkt.size != asf_st->packet_obj_size ||
1257 // FIXME is this condition sufficient?
1258 asf_st->frag_offset + asf->packet_frag_size > asf_st->pkt.size) {
1261 if (asf_st->pkt.data) {
1262 av_log(s, AV_LOG_INFO,
1263 "freeing incomplete packet size %d, new %d\n",
1264 asf_st->pkt.size, asf_st->packet_obj_size);
1265 asf_st->frag_offset = 0;
1266 av_free_packet(&asf_st->pkt);
1269 if ((ret = av_new_packet(&asf_st->pkt, asf_st->packet_obj_size)) < 0)
1271 asf_st->seq = asf->packet_seq;
1272 if (asf->ts_is_pts) {
1273 asf_st->pkt.pts = asf->packet_frag_timestamp - asf->hdr.preroll;
1275 asf_st->pkt.dts = asf->packet_frag_timestamp - asf->hdr.preroll;
1276 asf_st->pkt.stream_index = asf->stream_index;
1277 asf_st->pkt.pos = asf_st->packet_pos = asf->packet_pos;
1278 asf_st->pkt_clean = 0;
1280 if (asf_st->pkt.data && asf_st->palette_changed) {
1282 pal = av_packet_new_side_data(&asf_st->pkt, AV_PKT_DATA_PALETTE,
1285 av_log(s, AV_LOG_ERROR, "Cannot append palette to packet\n");
1287 memcpy(pal, asf_st->palette, AVPALETTE_SIZE);
1288 asf_st->palette_changed = 0;
1291 av_log(asf, AV_LOG_TRACE, "new packet: stream:%d key:%d packet_key:%d audio:%d size:%d\n",
1292 asf->stream_index, asf->packet_key_frame,
1293 asf_st->pkt.flags & AV_PKT_FLAG_KEY,
1294 s->streams[asf->stream_index]->codec->codec_type == AVMEDIA_TYPE_AUDIO,
1295 asf_st->packet_obj_size);
1296 if (s->streams[asf->stream_index]->codec->codec_type == AVMEDIA_TYPE_AUDIO)
1297 asf->packet_key_frame = 1;
1298 if (asf->packet_key_frame)
1299 asf_st->pkt.flags |= AV_PKT_FLAG_KEY;
1303 av_log(asf, AV_LOG_TRACE, "READ PACKET s:%d os:%d o:%d,%d l:%d DATA:%p\n",
1304 s->packet_size, asf_st->pkt.size, asf->packet_frag_offset,
1305 asf_st->frag_offset, asf->packet_frag_size, asf_st->pkt.data);
1306 asf->packet_size_left -= asf->packet_frag_size;
1307 if (asf->packet_size_left < 0)
1310 if (asf->packet_frag_offset >= asf_st->pkt.size ||
1311 asf->packet_frag_size > asf_st->pkt.size - asf->packet_frag_offset) {
1312 av_log(s, AV_LOG_ERROR,
1313 "packet fragment position invalid %u,%u not in %u\n",
1314 asf->packet_frag_offset, asf->packet_frag_size,
1319 if (asf->packet_frag_offset != asf_st->frag_offset && !asf_st->pkt_clean) {
1320 memset(asf_st->pkt.data + asf_st->frag_offset, 0, asf_st->pkt.size - asf_st->frag_offset);
1321 asf_st->pkt_clean = 1;
1324 ret = avio_read(pb, asf_st->pkt.data + asf->packet_frag_offset,
1325 asf->packet_frag_size);
1326 if (ret != asf->packet_frag_size) {
1327 if (ret < 0 || asf->packet_frag_offset + ret == 0)
1328 return ret < 0 ? ret : AVERROR_EOF;
1330 if (asf_st->ds_span > 1) {
1331 // scrambling, we can either drop it completely or fill the remainder
1332 // TODO: should we fill the whole packet instead of just the current
1334 memset(asf_st->pkt.data + asf->packet_frag_offset + ret, 0,
1335 asf->packet_frag_size - ret);
1336 ret = asf->packet_frag_size;
1338 // no scrambling, so we can return partial packets
1339 av_shrink_packet(&asf_st->pkt, asf->packet_frag_offset + ret);
1342 if (s->key && s->keylen == 20)
1343 ff_asfcrypt_dec(s->key, asf_st->pkt.data + asf->packet_frag_offset,
1345 asf_st->frag_offset += ret;
1346 /* test if whole packet is read */
1347 if (asf_st->frag_offset == asf_st->pkt.size) {
1348 // workaround for macroshit radio DVR-MS files
1349 if (s->streams[asf->stream_index]->codec->codec_id == AV_CODEC_ID_MPEG2VIDEO &&
1350 asf_st->pkt.size > 100) {
1352 for (i = 0; i < asf_st->pkt.size && !asf_st->pkt.data[i]; i++)
1354 if (i == asf_st->pkt.size) {
1355 av_log(s, AV_LOG_DEBUG, "discarding ms fart\n");
1356 asf_st->frag_offset = 0;
1357 av_free_packet(&asf_st->pkt);
1363 if (asf_st->ds_span > 1) {
1364 if (asf_st->pkt.size != asf_st->ds_packet_size * asf_st->ds_span) {
1365 av_log(s, AV_LOG_ERROR,
1366 "pkt.size != ds_packet_size * ds_span (%d %d %d)\n",
1367 asf_st->pkt.size, asf_st->ds_packet_size,
1370 /* packet descrambling */
1371 AVBufferRef *buf = av_buffer_alloc(asf_st->pkt.size +
1372 FF_INPUT_BUFFER_PADDING_SIZE);
1374 uint8_t *newdata = buf->data;
1376 memset(newdata + asf_st->pkt.size, 0,
1377 FF_INPUT_BUFFER_PADDING_SIZE);
1378 while (offset < asf_st->pkt.size) {
1379 int off = offset / asf_st->ds_chunk_size;
1380 int row = off / asf_st->ds_span;
1381 int col = off % asf_st->ds_span;
1382 int idx = row + col * asf_st->ds_packet_size / asf_st->ds_chunk_size;
1383 assert(offset + asf_st->ds_chunk_size <= asf_st->pkt.size);
1384 assert(idx + 1 <= asf_st->pkt.size / asf_st->ds_chunk_size);
1385 memcpy(newdata + offset,
1386 asf_st->pkt.data + idx * asf_st->ds_chunk_size,
1387 asf_st->ds_chunk_size);
1388 offset += asf_st->ds_chunk_size;
1390 av_buffer_unref(&asf_st->pkt.buf);
1391 asf_st->pkt.buf = buf;
1392 asf_st->pkt.data = buf->data;
1396 asf_st->frag_offset = 0;
1398 #if FF_API_DESTRUCT_PACKET
1399 FF_DISABLE_DEPRECATION_WARNINGS
1400 asf_st->pkt.destruct = NULL;
1401 FF_ENABLE_DEPRECATION_WARNINGS
1403 asf_st->pkt.buf = 0;
1404 asf_st->pkt.size = 0;
1405 asf_st->pkt.data = 0;
1406 asf_st->pkt.side_data_elems = 0;
1407 asf_st->pkt.side_data = NULL;
1408 break; // packet completed
1414 static int asf_read_packet(AVFormatContext *s, AVPacket *pkt)
1416 ASFContext *asf = s->priv_data;
1421 /* parse cached packets, if any */
1422 if ((ret = asf_parse_packet(s, s->pb, pkt)) <= 0)
1424 if ((ret = asf_get_packet(s, s->pb)) < 0)
1425 assert(asf->packet_size_left < FRAME_HEADER_SIZE ||
1426 asf->packet_segments < 1);
1427 asf->packet_time_start = 0;
1431 // Added to support seeking after packets have been read
1432 // If information is not reset, read_packet fails due to
1433 // leftover information from previous reads
1434 static void asf_reset_header(AVFormatContext *s)
1436 ASFContext *asf = s->priv_data;
1440 asf->packet_size_left = 0;
1441 asf->packet_flags = 0;
1442 asf->packet_property = 0;
1443 asf->packet_timestamp = 0;
1444 asf->packet_segsizetype = 0;
1445 asf->packet_segments = 0;
1446 asf->packet_seq = 0;
1447 asf->packet_replic_size = 0;
1448 asf->packet_key_frame = 0;
1449 asf->packet_padsize = 0;
1450 asf->packet_frag_offset = 0;
1451 asf->packet_frag_size = 0;
1452 asf->packet_frag_timestamp = 0;
1453 asf->packet_multi_size = 0;
1454 asf->packet_time_delta = 0;
1455 asf->packet_time_start = 0;
1457 for (i = 0; i < 128; i++) {
1458 asf_st = &asf->streams[i];
1459 av_free_packet(&asf_st->pkt);
1460 asf_st->packet_obj_size = 0;
1461 asf_st->frag_offset = 0;
1467 static void skip_to_key(AVFormatContext *s)
1469 ASFContext *asf = s->priv_data;
1472 for (i = 0; i < 128; i++) {
1473 int j = asf->asfid2avid[i];
1474 ASFStream *asf_st = &asf->streams[i];
1475 if (j < 0 || s->streams[j]->codec->codec_type != AVMEDIA_TYPE_VIDEO)
1478 asf_st->skip_to_key = 1;
1482 static int asf_read_close(AVFormatContext *s)
1484 asf_reset_header(s);
1489 static int64_t asf_read_pts(AVFormatContext *s, int stream_index,
1490 int64_t *ppos, int64_t pos_limit)
1492 ASFContext *asf = s->priv_data;
1493 AVPacket pkt1, *pkt = &pkt1;
1496 int64_t pos = *ppos;
1498 int64_t start_pos[ASF_MAX_STREAMS];
1500 for (i = 0; i < s->nb_streams; i++)
1503 if (s->packet_size > 0)
1504 pos = (pos + s->packet_size - 1 - s->internal->data_offset) /
1505 s->packet_size * s->packet_size +
1506 s->internal->data_offset;
1508 if (avio_seek(s->pb, pos, SEEK_SET) < 0)
1509 return AV_NOPTS_VALUE;
1511 ff_read_frame_flush(s);
1512 asf_reset_header(s);
1514 if (av_read_frame(s, pkt) < 0) {
1515 av_log(s, AV_LOG_INFO, "asf_read_pts failed\n");
1516 return AV_NOPTS_VALUE;
1521 av_free_packet(pkt);
1522 if (pkt->flags & AV_PKT_FLAG_KEY) {
1523 i = pkt->stream_index;
1525 asf_st = &asf->streams[s->streams[i]->id];
1527 // assert((asf_st->packet_pos - s->data_offset) % s->packet_size == 0);
1528 pos = asf_st->packet_pos;
1529 av_assert1(pkt->pos == asf_st->packet_pos);
1531 av_add_index_entry(s->streams[i], pos, pts, pkt->size,
1532 pos - start_pos[i] + 1, AVINDEX_KEYFRAME);
1533 start_pos[i] = asf_st->packet_pos + 1;
1535 if (pkt->stream_index == stream_index)
1544 static int asf_build_simple_index(AVFormatContext *s, int stream_index)
1547 ASFContext *asf = s->priv_data;
1548 int64_t current_pos = avio_tell(s->pb);
1551 if((ret = avio_seek(s->pb, asf->data_object_offset + asf->data_object_size, SEEK_SET)) < 0) {
1555 if ((ret = ff_get_guid(s->pb, &g)) < 0)
1558 /* the data object can be followed by other top-level objects,
1559 * skip them until the simple index object is reached */
1560 while (ff_guidcmp(&g, &ff_asf_simple_index_header)) {
1561 int64_t gsize = avio_rl64(s->pb);
1562 if (gsize < 24 || avio_feof(s->pb)) {
1565 avio_skip(s->pb, gsize - 24);
1566 if ((ret = ff_get_guid(s->pb, &g)) < 0)
1571 int64_t itime, last_pos = -1;
1574 int64_t av_unused gsize = avio_rl64(s->pb);
1575 if ((ret = ff_get_guid(s->pb, &g)) < 0)
1577 itime = avio_rl64(s->pb);
1578 pct = avio_rl32(s->pb);
1579 ict = avio_rl32(s->pb);
1580 av_log(s, AV_LOG_DEBUG,
1581 "itime:0x%"PRIx64", pct:%d, ict:%d\n", itime, pct, ict);
1583 for (i = 0; i < ict; i++) {
1584 int pktnum = avio_rl32(s->pb);
1585 int pktct = avio_rl16(s->pb);
1586 int64_t pos = s->internal->data_offset + s->packet_size * (int64_t)pktnum;
1587 int64_t index_pts = FFMAX(av_rescale(itime, i, 10000) - asf->hdr.preroll, 0);
1589 if (pos != last_pos) {
1590 av_log(s, AV_LOG_DEBUG, "pktnum:%d, pktct:%d pts: %"PRId64"\n",
1591 pktnum, pktct, index_pts);
1592 av_add_index_entry(s->streams[stream_index], pos, index_pts,
1593 s->packet_size, 0, AVINDEX_KEYFRAME);
1597 asf->index_read = ict > 1;
1600 // if (avio_feof(s->pb)) {
1603 avio_seek(s->pb, current_pos, SEEK_SET);
1607 static int asf_read_seek(AVFormatContext *s, int stream_index,
1608 int64_t pts, int flags)
1610 ASFContext *asf = s->priv_data;
1611 AVStream *st = s->streams[stream_index];
1614 if (s->packet_size <= 0)
1617 /* Try using the protocol's read_seek if available */
1619 int64_t ret = avio_seek_time(s->pb, stream_index, pts, flags);
1621 asf_reset_header(s);
1622 if (ret != AVERROR(ENOSYS))
1626 /* explicitly handle the case of seeking to 0 */
1628 asf_reset_header(s);
1629 avio_seek(s->pb, s->internal->data_offset, SEEK_SET);
1633 if (!asf->index_read) {
1634 ret = asf_build_simple_index(s, stream_index);
1636 asf->index_read = -1;
1639 if (asf->index_read > 0 && st->index_entries) {
1640 int index = av_index_search_timestamp(st, pts, flags);
1642 /* find the position */
1643 uint64_t pos = st->index_entries[index].pos;
1646 av_log(s, AV_LOG_DEBUG, "SEEKTO: %"PRId64"\n", pos);
1647 if(avio_seek(s->pb, pos, SEEK_SET) < 0)
1649 asf_reset_header(s);
1654 /* no index or seeking by index failed */
1655 if (ff_seek_frame_binary(s, stream_index, pts, flags) < 0)
1657 asf_reset_header(s);
1662 AVInputFormat ff_asf_demuxer = {
1664 .long_name = NULL_IF_CONFIG_SMALL("ASF (Advanced / Active Streaming Format)"),
1665 .priv_data_size = sizeof(ASFContext),
1666 .read_probe = asf_probe,
1667 .read_header = asf_read_header,
1668 .read_packet = asf_read_packet,
1669 .read_close = asf_read_close,
1670 .read_seek = asf_read_seek,
1671 .read_timestamp = asf_read_pts,
1672 .flags = AVFMT_NOBINSEARCH | AVFMT_NOGENSEARCH,
1673 .priv_class = &asf_class,