2 * Microsoft Advanced Streaming Format demuxer
3 * Copyright (c) 2014 Alexandra Hájková
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/avstring.h"
24 #include "libavutil/bswap.h"
25 #include "libavutil/common.h"
26 #include "libavutil/dict.h"
27 #include "libavutil/internal.h"
28 #include "libavutil/mathematics.h"
29 #include "libavutil/opt.h"
30 #include "libavutil/time_internal.h"
33 #include "avio_internal.h"
34 #include "avlanguage.h"
46 #define ASF_UNICODE 0x0
47 #define ASF_FLAG_BROADCAST 0x1
48 #define ASF_BYTE_ARRAY 0x1
49 #define ASF_TYPE_AUDIO 0x2
50 #define ASF_TYPE_VIDEO 0x1
51 #define ASF_STREAM_NUM 0x7F
52 #define ASF_MAX_STREAMS 128
53 #define BMP_HEADER_SIZE 40
54 #define ASF_NUM_OF_PAYLOADS 0x3F
55 #define ASF_ERROR_CORRECTION_LENGTH_TYPE 0x60
56 #define ASF_PACKET_ERROR_CORRECTION_DATA_SIZE 0x2
58 typedef struct GUIDParseTable {
61 int (*read_object)(AVFormatContext *, const struct GUIDParseTable *);
65 typedef struct ASFPacket {
68 uint32_t frame_num; // ASF payloads with the same number are parts of the same frame
76 typedef struct ASFStream {
77 uint8_t stream_index; // from packet header
78 int index; // stream index in AVFormatContext, set in asf_read_stream_properties
80 int indexed; // added index entries from the Simple Index Object or not
81 int8_t span; // for deinterleaving
82 uint16_t virtual_pkt_len;
83 uint16_t virtual_chunk_len;
88 typedef struct ASFStreamData{
90 AVDictionary *asf_met; // for storing per-stream metadata
91 AVRational aspect_ratio;
94 typedef struct ASFContext {
96 int is_simple_index; // is simple index present or not 1/0
100 uint64_t nb_packets; // ASF packets
101 uint32_t packet_size;
105 uint32_t b_flags; // flags with broadcast flag
106 uint32_t prop_flags; // file properties object flags
108 uint64_t data_size; // data object size
109 uint64_t unknown_size; // size of the unknown object
111 int64_t offset; // offset of the current object
114 int64_t first_packet_offset; // packet offset
115 int64_t unknown_offset; // for top level header objects or subobjects without specified behavior
117 // ASF file must not contain more than 128 streams according to the specification
118 ASFStream *asf_st[ASF_MAX_STREAMS];
119 ASFStreamData asf_sd[ASF_MAX_STREAMS];
122 int stream_index; // from packet header, for the subpayload case
125 uint64_t sub_header_offset; // offset of subpayload header
127 uint8_t dts_delta; // for subpayloads
128 uint32_t packet_size_internal; // packet size stored inside ASFPacket, can be 0
129 int64_t packet_offset; // offset of the current packet inside Data Object
130 uint32_t pad_len; // padding after payload
131 uint32_t rep_data_len;
134 uint64_t sub_left; // subpayloads left or not
135 unsigned int nb_sub; // number of subpayloads read so far from the current ASF packet
136 uint16_t mult_sub_len; // total length of subpayloads array inside multiple payload
137 uint64_t nb_mult_left; // multiple payloads left
138 int return_subpayload;
147 static int detect_unknown_subobject(AVFormatContext *s, int64_t offset, int64_t size);
148 static const GUIDParseTable *find_guid(ff_asf_guid guid);
150 static int asf_probe(const AVProbeData *pd)
152 /* check file header */
153 if (!ff_guidcmp(pd->buf, &ff_asf_header))
154 return AVPROBE_SCORE_MAX/2;
159 static void swap_guid(ff_asf_guid guid)
161 FFSWAP(unsigned char, guid[0], guid[3]);
162 FFSWAP(unsigned char, guid[1], guid[2]);
163 FFSWAP(unsigned char, guid[4], guid[5]);
164 FFSWAP(unsigned char, guid[6], guid[7]);
167 static void align_position(AVIOContext *pb, int64_t offset, uint64_t size)
169 if (size < INT64_MAX - offset && avio_tell(pb) != offset + size)
170 avio_seek(pb, offset + size, SEEK_SET);
173 static int asf_read_unknown(AVFormatContext *s, const GUIDParseTable *g)
175 ASFContext *asf = s->priv_data;
176 AVIOContext *pb = s->pb;
177 uint64_t size = avio_rl64(pb);
180 if (size > INT64_MAX)
181 return AVERROR_INVALIDDATA;
184 asf->unknown_size = size;
186 if (!g->is_subobject) {
187 if (!(ret = strcmp(g->name, "Header Extension")))
188 avio_skip(pb, 22); // skip reserved fields and Data Size
189 if ((ret = detect_unknown_subobject(s, asf->unknown_offset,
190 asf->unknown_size)) < 0)
194 av_log(s, AV_LOG_ERROR, "Too small size %"PRIu64" (< 24).\n", size);
195 return AVERROR_INVALIDDATA;
197 avio_skip(pb, size - 24);
203 static int get_asf_string(AVIOContext *pb, int maxlen, char *buf, int buflen)
208 return AVERROR(EINVAL);
209 while (ret + 1 < maxlen) {
212 GET_UTF16(ch, (ret += 2) <= maxlen ? avio_rl16(pb) : 0, break;);
213 PUT_UTF8(ch, tmp, if (q - buf < buflen - 1) *q++ = tmp;)
220 static int asf_read_marker(AVFormatContext *s, const GUIDParseTable *g)
222 ASFContext *asf = s->priv_data;
223 AVIOContext *pb = s->pb;
224 uint64_t size = avio_rl64(pb);
225 int i, nb_markers, ret;
230 avio_skip(pb, 8); // skip reserved GUID
231 nb_markers = avio_rl32(pb);
232 avio_skip(pb, 2); // skip reserved field
234 for (i = 0; i < len; i++)
237 for (i = 0; i < nb_markers; i++) {
242 pts -= asf->preroll * 10000;
243 avio_skip(pb, 2); // entry length
244 avio_skip(pb, 4); // send time
245 avio_skip(pb, 4); // flags
249 return AVERROR_INVALIDDATA;
251 if ((ret = avio_get_str16le(pb, len, name,
252 sizeof(name))) < len)
253 avio_skip(pb, len - ret);
254 avpriv_new_chapter(s, i, (AVRational) { 1, 10000000 }, pts,
255 AV_NOPTS_VALUE, name);
257 align_position(pb, asf->offset, size);
262 static int asf_read_metadata(AVFormatContext *s, const char *title, uint16_t len,
263 unsigned char *ch, uint16_t buflen)
265 AVIOContext *pb = s->pb;
267 avio_get_str16le(pb, len, ch, buflen);
269 if (av_dict_set(&s->metadata, title, ch, 0) < 0)
270 av_log(s, AV_LOG_WARNING, "av_dict_set failed.\n");
276 static int asf_read_value(AVFormatContext *s, const uint8_t *name,
277 uint16_t val_len, int type, AVDictionary **met)
281 uint16_t buflen = 2 * val_len + 1;
282 AVIOContext *pb = s->pb;
284 value = av_malloc(buflen);
286 return AVERROR(ENOMEM);
287 if (type == ASF_UNICODE) {
288 // get_asf_string reads UTF-16 and converts it to UTF-8 which needs longer buffer
289 if ((ret = get_asf_string(pb, val_len, value, buflen)) < 0)
291 if (av_dict_set(met, name, value, 0) < 0)
292 av_log(s, AV_LOG_WARNING, "av_dict_set failed.\n");
295 if (val_len > sizeof(buf)) {
296 ret = AVERROR_INVALIDDATA;
299 if ((ret = avio_read(pb, value, val_len)) < 0)
301 if (ret < 2 * val_len)
304 value[2 * val_len - 1] = '\0';
305 snprintf(buf, sizeof(buf), "%s", value);
306 if (av_dict_set(met, name, buf, 0) < 0)
307 av_log(s, AV_LOG_WARNING, "av_dict_set failed.\n");
317 static int asf_read_generic_value(AVIOContext *pb, int type, uint64_t *value)
322 *value = avio_rl16(pb);
325 *value = avio_rl32(pb);
328 *value = avio_rl64(pb);
331 *value = avio_rl16(pb);
334 return AVERROR_INVALIDDATA;
340 static int asf_set_metadata(AVFormatContext *s, const uint8_t *name,
341 int type, AVDictionary **met)
343 AVIOContext *pb = s->pb;
348 ret = asf_read_generic_value(pb, type, &value);
352 snprintf(buf, sizeof(buf), "%"PRIu64, value);
353 if (av_dict_set(met, name, buf, 0) < 0)
354 av_log(s, AV_LOG_WARNING, "av_dict_set failed.\n");
359 /* MSDN claims that this should be "compatible with the ID3 frame, APIC",
360 * but in reality this is only loosely similar */
361 static int asf_read_picture(AVFormatContext *s, int len)
363 AVPacket pkt = { 0 };
364 const CodecMime *mime = ff_id3v2_mime_tags;
365 enum AVCodecID id = AV_CODEC_ID_NONE;
367 uint8_t *desc = NULL;
369 int ret, type, picsize, desc_len;
371 /* type + picsize + mime + desc */
372 if (len < 1 + 4 + 2 + 2) {
373 av_log(s, AV_LOG_ERROR, "Invalid attached picture size: %d.\n", len);
374 return AVERROR_INVALIDDATA;
378 type = avio_r8(s->pb);
380 if (type >= FF_ARRAY_ELEMS(ff_id3v2_picture_types) || type < 0) {
381 av_log(s, AV_LOG_WARNING, "Unknown attached picture type: %d.\n", type);
385 /* picture data size */
386 picsize = avio_rl32(s->pb);
389 /* picture MIME type */
390 len -= avio_get_str16le(s->pb, len, mimetype, sizeof(mimetype));
391 while (mime->id != AV_CODEC_ID_NONE) {
392 if (!strncmp(mime->str, mimetype, sizeof(mimetype))) {
398 if (id == AV_CODEC_ID_NONE) {
399 av_log(s, AV_LOG_ERROR, "Unknown attached picture mimetype: %s.\n",
404 if (picsize >= len) {
405 av_log(s, AV_LOG_ERROR, "Invalid attached picture data size: %d >= %d.\n",
407 return AVERROR_INVALIDDATA;
410 /* picture description */
411 desc_len = (len - picsize) * 2 + 1;
412 desc = av_malloc(desc_len);
414 return AVERROR(ENOMEM);
415 len -= avio_get_str16le(s->pb, len - picsize, desc, desc_len);
417 ret = av_get_packet(s->pb, &pkt, picsize);
421 st = avformat_new_stream(s, NULL);
423 ret = AVERROR(ENOMEM);
427 st->disposition |= AV_DISPOSITION_ATTACHED_PIC;
428 st->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
429 st->codecpar->codec_id = id;
430 st->attached_pic = pkt;
431 st->attached_pic.stream_index = st->index;
432 st->attached_pic.flags |= AV_PKT_FLAG_KEY;
435 if (av_dict_set(&st->metadata, "title", desc, AV_DICT_DONT_STRDUP_VAL) < 0)
436 av_log(s, AV_LOG_WARNING, "av_dict_set failed.\n");
440 if (av_dict_set(&st->metadata, "comment", ff_id3v2_picture_types[type], 0) < 0)
441 av_log(s, AV_LOG_WARNING, "av_dict_set failed.\n");
447 av_packet_unref(&pkt);
451 static void get_id3_tag(AVFormatContext *s, int len)
453 ID3v2ExtraMeta *id3v2_extra_meta = NULL;
455 ff_id3v2_read(s, ID3v2_DEFAULT_MAGIC, &id3v2_extra_meta, len);
456 if (id3v2_extra_meta) {
457 ff_id3v2_parse_apic(s, id3v2_extra_meta);
458 ff_id3v2_parse_chapters(s, id3v2_extra_meta);
460 ff_id3v2_free_extra_meta(&id3v2_extra_meta);
463 static int process_metadata(AVFormatContext *s, const uint8_t *name, uint16_t name_len,
464 uint16_t val_len, uint16_t type, AVDictionary **met)
472 asf_read_value(s, name, val_len, type, met);
475 if (!strcmp(name, "WM/Picture")) // handle cover art
476 asf_read_picture(s, val_len);
477 else if (!strcmp(name, "ID3")) // handle ID3 tag
478 get_id3_tag(s, val_len);
480 asf_read_value(s, name, val_len, type, met);
483 ff_get_guid(s->pb, &guid);
486 if ((ret = asf_set_metadata(s, name, type, met)) < 0)
495 static int asf_read_ext_content(AVFormatContext *s, const GUIDParseTable *g)
497 ASFContext *asf = s->priv_data;
498 AVIOContext *pb = s->pb;
499 uint64_t size = avio_rl64(pb);
500 uint16_t nb_desc = avio_rl16(pb);
503 for (i = 0; i < nb_desc; i++) {
504 uint16_t name_len, type, val_len;
505 uint8_t *name = NULL;
507 name_len = avio_rl16(pb);
509 return AVERROR_INVALIDDATA;
510 name = av_malloc(name_len);
512 return AVERROR(ENOMEM);
513 avio_get_str16le(pb, name_len, name,
515 type = avio_rl16(pb);
516 // BOOL values are 16 bits long in the Metadata Object
517 // but 32 bits long in the Extended Content Description Object
518 if (type == ASF_BOOL)
520 val_len = avio_rl16(pb);
522 ret = process_metadata(s, name, name_len, val_len, type, &s->metadata);
528 align_position(pb, asf->offset, size);
532 static AVStream *find_stream(AVFormatContext *s, uint16_t st_num)
535 ASFContext *asf = s->priv_data;
538 for (i = 0; i < asf->nb_streams; i++) {
539 if (asf->asf_st[i]->stream_index == st_num) {
540 st = s->streams[asf->asf_st[i]->index];
548 static int asf_store_aspect_ratio(AVFormatContext *s, uint8_t st_num, uint8_t *name, int type)
550 ASFContext *asf = s->priv_data;
551 AVIOContext *pb = s->pb;
555 ret = asf_read_generic_value(pb, type, &value);
559 if (st_num < ASF_MAX_STREAMS) {
560 if (!strcmp(name, "AspectRatioX"))
561 asf->asf_sd[st_num].aspect_ratio.num = value;
563 asf->asf_sd[st_num].aspect_ratio.den = value;
568 static int asf_read_metadata_obj(AVFormatContext *s, const GUIDParseTable *g)
570 ASFContext *asf = s->priv_data;
571 AVIOContext *pb = s->pb;
572 uint64_t size = avio_rl64(pb);
573 uint16_t nb_recs = avio_rl16(pb); // number of records in the Description Records list
576 for (i = 0; i < nb_recs; i++) {
577 uint16_t name_len, buflen, type, val_len, st_num;
578 uint8_t *name = NULL;
580 avio_skip(pb, 2); // skip reserved field
581 st_num = avio_rl16(pb);
582 name_len = avio_rl16(pb);
583 buflen = 2 * name_len + 1;
586 type = avio_rl16(pb);
587 val_len = avio_rl32(pb);
588 name = av_malloc(buflen);
590 return AVERROR(ENOMEM);
591 avio_get_str16le(pb, name_len, name,
593 if (!strcmp(name, "AspectRatioX") || !strcmp(name, "AspectRatioY")) {
594 ret = asf_store_aspect_ratio(s, st_num, name, type);
600 if (st_num < ASF_MAX_STREAMS) {
601 if ((ret = process_metadata(s, name, name_len, val_len, type,
602 st_num ? &asf->asf_sd[st_num].asf_met
603 : &s->metadata)) < 0) {
612 align_position(pb, asf->offset, size);
616 static int asf_read_content_desc(AVFormatContext *s, const GUIDParseTable *g)
618 ASFContext *asf = s->priv_data;
619 AVIOContext *pb = s->pb;
621 static const char *const titles[] =
622 { "Title", "Author", "Copyright", "Description", "Rate" };
623 uint16_t len[5], buflen[5] = { 0 };
625 uint64_t size = avio_rl64(pb);
627 for (i = 0; i < 5; i++) {
628 len[i] = avio_rl16(pb);
629 // utf8 string should be <= 2 * utf16 string, extra byte for the terminator
630 buflen[i] = 2 * len[i] + 1;
633 for (i = 0; i < 5; i++) {
634 ch = av_malloc(buflen[i]);
636 return(AVERROR(ENOMEM));
637 asf_read_metadata(s, titles[i], len[i], ch, buflen[i]);
640 align_position(pb, asf->offset, size);
645 static int asf_read_properties(AVFormatContext *s, const GUIDParseTable *g)
647 ASFContext *asf = s->priv_data;
648 AVIOContext *pb = s->pb;
649 time_t creation_time;
651 avio_rl64(pb); // read object size
652 avio_skip(pb, 16); // skip File ID
653 avio_skip(pb, 8); // skip File size
654 creation_time = avio_rl64(pb);
655 if (!(asf->b_flags & ASF_FLAG_BROADCAST)) {
660 // creation date is in 100 ns units from 1 Jan 1601, conversion to s
661 creation_time /= 10000000;
662 // there are 11644473600 seconds between 1 Jan 1601 and 1 Jan 1970
663 creation_time -= 11644473600;
664 tm = gmtime_r(&creation_time, &tmbuf);
666 if (!strftime(buf, sizeof(buf), "%Y-%m-%d %H:%M:%S", tm))
671 if (av_dict_set(&s->metadata, "creation_time", buf, 0) < 0)
672 av_log(s, AV_LOG_WARNING, "av_dict_set failed.\n");
675 asf->nb_packets = avio_rl64(pb);
676 asf->duration = avio_rl64(pb) / 10000; // stream duration
677 avio_skip(pb, 8); // skip send duration
678 asf->preroll = avio_rl64(pb);
679 asf->duration -= asf->preroll;
680 asf->b_flags = avio_rl32(pb);
681 avio_skip(pb, 4); // skip minimal packet size
682 asf->packet_size = avio_rl32(pb);
683 avio_skip(pb, 4); // skip max_bitrate
688 static int parse_video_info(AVIOContext *pb, AVStream *st)
690 uint16_t size_asf; // ASF-specific Format Data size
691 uint32_t size_bmp; // BMP_HEADER-specific Format Data size
694 st->codecpar->width = avio_rl32(pb);
695 st->codecpar->height = avio_rl32(pb);
696 avio_skip(pb, 1); // skip reserved flags
697 size_asf = avio_rl16(pb);
698 tag = ff_get_bmp_header(pb, st, &size_bmp);
699 st->codecpar->codec_tag = tag;
700 st->codecpar->codec_id = ff_codec_get_id(ff_codec_bmp_tags, tag);
701 size_bmp = FFMAX(size_asf, size_bmp);
703 if (size_bmp > BMP_HEADER_SIZE &&
704 size_bmp < INT_MAX - AV_INPUT_BUFFER_PADDING_SIZE) {
706 st->codecpar->extradata_size = size_bmp - BMP_HEADER_SIZE;
707 if (!(st->codecpar->extradata = av_malloc(st->codecpar->extradata_size +
708 AV_INPUT_BUFFER_PADDING_SIZE))) {
709 st->codecpar->extradata_size = 0;
710 return AVERROR(ENOMEM);
712 memset(st->codecpar->extradata + st->codecpar->extradata_size , 0,
713 AV_INPUT_BUFFER_PADDING_SIZE);
714 if ((ret = avio_read(pb, st->codecpar->extradata,
715 st->codecpar->extradata_size)) < 0)
721 static int asf_read_stream_properties(AVFormatContext *s, const GUIDParseTable *g)
723 ASFContext *asf = s->priv_data;
724 AVIOContext *pb = s->pb;
726 uint32_t err_data_len, ts_data_len; // type specific data length
728 ff_asf_guid stream_type;
729 enum AVMediaType type;
731 uint8_t stream_index;
735 // ASF file must not contain more than 128 streams according to the specification
736 if (asf->nb_streams >= ASF_MAX_STREAMS)
737 return AVERROR_INVALIDDATA;
739 size = avio_rl64(pb);
740 ff_get_guid(pb, &stream_type);
741 if (!ff_guidcmp(&stream_type, &ff_asf_audio_stream))
742 type = AVMEDIA_TYPE_AUDIO;
743 else if (!ff_guidcmp(&stream_type, &ff_asf_video_stream))
744 type = AVMEDIA_TYPE_VIDEO;
745 else if (!ff_guidcmp(&stream_type, &ff_asf_jfif_media))
746 type = AVMEDIA_TYPE_VIDEO;
747 else if (!ff_guidcmp(&stream_type, &ff_asf_command_stream))
748 type = AVMEDIA_TYPE_DATA;
749 else if (!ff_guidcmp(&stream_type,
750 &ff_asf_ext_stream_embed_stream_header))
751 type = AVMEDIA_TYPE_UNKNOWN;
753 return AVERROR_INVALIDDATA;
755 ff_get_guid(pb, &stream_type); // error correction type
756 avio_skip(pb, 8); // skip the time offset
757 ts_data_len = avio_rl32(pb);
758 err_data_len = avio_rl32(pb);
759 flags = avio_rl16(pb); // bit 15 - Encrypted Content
761 stream_index = flags & ASF_STREAM_NUM;
762 for (i = 0; i < asf->nb_streams; i++)
763 if (stream_index == asf->asf_st[i]->stream_index) {
764 av_log(s, AV_LOG_WARNING,
765 "Duplicate stream found, this stream will be ignored.\n");
766 align_position(pb, asf->offset, size);
770 st = avformat_new_stream(s, NULL);
772 return AVERROR(ENOMEM);
773 avpriv_set_pts_info(st, 32, 1, 1000); // pts should be dword, in milliseconds
774 st->codecpar->codec_type = type;
775 asf->asf_st[asf->nb_streams] = av_mallocz(sizeof(*asf_st));
776 if (!asf->asf_st[asf->nb_streams])
777 return AVERROR(ENOMEM);
778 asf_st = asf->asf_st[asf->nb_streams];
780 asf_st->stream_index = stream_index;
781 asf_st->index = st->index;
783 st->id = flags & ASF_STREAM_NUM;
784 asf_st->pkt.data_size = 0;
785 asf_st->pkt.avpkt = av_packet_alloc();
786 if (!asf_st->pkt.avpkt)
787 return AVERROR(ENOMEM);
788 avio_skip(pb, 4); // skip reserved field
791 case AVMEDIA_TYPE_AUDIO:
792 asf_st->type = AVMEDIA_TYPE_AUDIO;
793 if ((ret = ff_get_wav_header(s, pb, st->codecpar, ts_data_len, 0)) < 0)
796 case AVMEDIA_TYPE_VIDEO:
797 asf_st->type = AVMEDIA_TYPE_VIDEO;
798 if ((ret = parse_video_info(pb, st)) < 0)
802 avio_skip(pb, ts_data_len);
807 if (type == AVMEDIA_TYPE_AUDIO) {
808 uint8_t span = avio_r8(pb);
811 asf_st->virtual_pkt_len = avio_rl16(pb);
812 asf_st->virtual_chunk_len = avio_rl16(pb);
813 if (!asf_st->virtual_chunk_len || !asf_st->virtual_pkt_len)
814 return AVERROR_INVALIDDATA;
815 avio_skip(pb, err_data_len - 5);
817 avio_skip(pb, err_data_len - 1);
819 avio_skip(pb, err_data_len);
822 align_position(pb, asf->offset, size);
827 static void set_language(AVFormatContext *s, const char *rfc1766, AVDictionary **met)
829 // language abbr should contain at least 2 chars
830 if (rfc1766 && strlen(rfc1766) > 1) {
831 const char primary_tag[3] = { rfc1766[0], rfc1766[1], '\0' }; // ignore country code if any
832 const char *iso6392 = ff_convert_lang_to(primary_tag,
833 AV_LANG_ISO639_2_BIBL);
835 if (av_dict_set(met, "language", iso6392, 0) < 0)
836 av_log(s, AV_LOG_WARNING, "av_dict_set failed.\n");
840 static int asf_read_ext_stream_properties(AVFormatContext *s, const GUIDParseTable *g)
842 ASFContext *asf = s->priv_data;
843 AVIOContext *pb = s->pb;
846 uint16_t nb_st_name, nb_pay_exts, st_num, lang_idx;
849 uint64_t start_time, end_time, time_per_frame;
850 uint64_t size = avio_rl64(pb);
852 start_time = avio_rl64(pb);
853 end_time = avio_rl64(pb);
854 bitrate = avio_rl32(pb);
855 avio_skip(pb, 28); // skip some unused values
856 st_num = avio_rl16(pb);
857 st_num &= ASF_STREAM_NUM;
858 lang_idx = avio_rl16(pb); // Stream Language ID Index
859 if (lang_idx >= ASF_MAX_STREAMS)
860 return AVERROR_INVALIDDATA;
861 for (i = 0; i < asf->nb_streams; i++) {
862 if (st_num == asf->asf_st[i]->stream_index) {
863 st = s->streams[asf->asf_st[i]->index];
864 asf->asf_st[i]->lang_idx = lang_idx;
868 time_per_frame = avio_rl64(pb); // average time per frame
870 st->start_time = start_time;
871 st->duration = end_time - start_time;
872 st->codecpar->bit_rate = bitrate;
873 st->avg_frame_rate.num = 10000000;
874 st->avg_frame_rate.den = time_per_frame;
876 nb_st_name = avio_rl16(pb);
877 nb_pay_exts = avio_rl16(pb);
878 for (i = 0; i < nb_st_name; i++) {
881 avio_rl16(pb); // Language ID Index
886 for (i = 0; i < nb_pay_exts; i++) {
888 avio_skip(pb, 16); // Extension System ID
889 avio_skip(pb, 2); // Extension Data Size
894 if ((ret = ff_get_guid(pb, &guid)) < 0) {
895 align_position(pb, asf->offset, size);
901 if (g && !(strcmp(g->name, "Stream Properties"))) {
902 if ((ret = g->read_object(s, g)) < 0)
906 align_position(pb, asf->offset, size);
910 static int asf_read_language_list(AVFormatContext *s, const GUIDParseTable *g)
912 ASFContext *asf = s->priv_data;
913 AVIOContext *pb = s->pb;
915 uint64_t size = avio_rl64(pb);
916 uint16_t nb_langs = avio_rl16(pb);
918 if (nb_langs < ASF_MAX_STREAMS) {
919 for (i = 0; i < nb_langs; i++) {
924 if ((ret = get_asf_string(pb, len, asf->asf_sd[i].langs,
925 sizeof(asf->asf_sd[i].langs))) < 0) {
931 align_position(pb, asf->offset, size);
935 // returns data object offset when reading this object for the first time
936 static int asf_read_data(AVFormatContext *s, const GUIDParseTable *g)
938 ASFContext *asf = s->priv_data;
939 AVIOContext *pb = s->pb;
940 uint64_t size = asf->data_size = avio_rl64(pb);
943 if (!asf->data_reached) {
944 asf->data_reached = 1;
945 asf->data_offset = asf->offset;
948 for (i = 0; i < asf->nb_streams; i++) {
949 if (!(asf->b_flags & ASF_FLAG_BROADCAST))
950 s->streams[i]->duration = asf->duration;
952 asf->nb_mult_left = 0;
954 asf->state = PARSE_PACKET_HEADER;
955 asf->return_subpayload = 0;
956 asf->packet_size_internal = 0;
957 avio_skip(pb, 16); // skip File ID
958 size = avio_rl64(pb); // Total Data Packets
959 if (size != asf->nb_packets)
960 av_log(s, AV_LOG_WARNING,
961 "Number of Packets from File Properties Object is not equal to Total"
962 "Datapackets value! num of packets %"PRIu64" total num %"PRIu64".\n",
963 size, asf->nb_packets);
964 avio_skip(pb, 2); // skip reserved field
965 asf->first_packet_offset = avio_tell(pb);
966 if ((pb->seekable & AVIO_SEEKABLE_NORMAL) && !(asf->b_flags & ASF_FLAG_BROADCAST))
967 align_position(pb, asf->offset, asf->data_size);
972 static int asf_read_simple_index(AVFormatContext *s, const GUIDParseTable *g)
974 ASFContext *asf = s->priv_data;
975 AVIOContext *pb = s->pb;
977 uint64_t interval; // index entry time interval in 100 ns units, usually it's 1s
978 uint32_t pkt_num, nb_entries;
979 int32_t prev_pkt_num = -1;
982 uint64_t size = avio_rl64(pb);
984 // simple index objects should be ordered by stream number, this loop tries to find
985 // the first not indexed video stream
986 for (i = 0; i < asf->nb_streams; i++) {
987 if ((asf->asf_st[i]->type == AVMEDIA_TYPE_VIDEO) && !asf->asf_st[i]->indexed) {
988 asf->asf_st[i]->indexed = 1;
989 st = s->streams[asf->asf_st[i]->index];
994 avio_skip(pb, size - 24); // if there's no video stream, skip index object
997 avio_skip(pb, 16); // skip File ID
998 interval = avio_rl64(pb);
1000 nb_entries = avio_rl32(pb);
1001 for (i = 0; i < nb_entries; i++) {
1002 pkt_num = avio_rl32(pb);
1003 offset = avio_skip(pb, 2);
1005 av_log(s, AV_LOG_ERROR, "Skipping failed in asf_read_simple_index.\n");
1008 if (prev_pkt_num != pkt_num) {
1009 av_add_index_entry(st, asf->first_packet_offset + asf->packet_size *
1010 pkt_num, av_rescale(interval, i, 10000),
1011 asf->packet_size, 0, AVINDEX_KEYFRAME);
1012 prev_pkt_num = pkt_num;
1015 asf->is_simple_index = 1;
1016 align_position(pb, asf->offset, size);
1021 static const GUIDParseTable gdef[] = {
1022 { "Data", { 0x75, 0xB2, 0x26, 0x36, 0x66, 0x8E, 0x11, 0xCF, 0xA6, 0xD9, 0x00, 0xAA, 0x00, 0x62, 0xCE, 0x6C }, asf_read_data, 1 },
1023 { "Simple Index", { 0x33, 0x00, 0x08, 0x90, 0xE5, 0xB1, 0x11, 0xCF, 0x89, 0xF4, 0x00, 0xA0, 0xC9, 0x03, 0x49, 0xCB }, asf_read_simple_index, 1 },
1024 { "Content Description", { 0x75, 0xB2, 0x26, 0x33, 0x66 ,0x8E, 0x11, 0xCF, 0xA6, 0xD9, 0x00, 0xAA, 0x00, 0x62, 0xCE, 0x6C }, asf_read_content_desc, 1 },
1025 { "Extended Content Description", { 0xD2, 0xD0, 0xA4, 0x40, 0xE3, 0x07, 0x11, 0xD2, 0x97, 0xF0, 0x00, 0xA0, 0xC9, 0x5e, 0xA8, 0x50 }, asf_read_ext_content, 1 },
1026 { "Stream Bitrate Properties", { 0x7B, 0xF8, 0x75, 0xCE, 0x46, 0x8D, 0x11, 0xD1, 0x8D, 0x82, 0x00, 0x60, 0x97, 0xC9, 0xA2, 0xB2 }, asf_read_unknown, 1 },
1027 { "File Properties", { 0x8C, 0xAB, 0xDC, 0xA1, 0xA9, 0x47, 0x11, 0xCF, 0x8E, 0xE4, 0x00, 0xC0, 0x0C, 0x20, 0x53, 0x65 }, asf_read_properties, 1 },
1028 { "Header Extension", { 0x5F, 0xBF, 0x03, 0xB5, 0xA9, 0x2E, 0x11, 0xCF, 0x8E, 0xE3, 0x00, 0xC0, 0x0C, 0x20, 0x53, 0x65 }, asf_read_unknown, 0 },
1029 { "Stream Properties", { 0xB7, 0xDC, 0x07, 0x91, 0xA9, 0xB7, 0x11, 0xCF, 0x8E, 0xE6, 0x00, 0xC0, 0x0C, 0x20, 0x53, 0x65 }, asf_read_stream_properties, 1 },
1030 { "Codec List", { 0x86, 0xD1, 0x52, 0x40, 0x31, 0x1D, 0x11, 0xD0, 0xA3, 0xA4, 0x00, 0xA0, 0xC9, 0x03, 0x48, 0xF6 }, asf_read_unknown, 1 },
1031 { "Marker", { 0xF4, 0x87, 0xCD, 0x01, 0xA9, 0x51, 0x11, 0xCF, 0x8E, 0xE6, 0x00, 0xC0, 0x0C, 0x20, 0x53, 0x65 }, asf_read_marker, 1 },
1032 { "Script Command", { 0x1E, 0xFB, 0x1A, 0x30, 0x0B, 0x62, 0x11, 0xD0, 0xA3, 0x9B, 0x00, 0xA0, 0xC9, 0x03, 0x48, 0xF6 }, asf_read_unknown, 1 },
1033 { "Language List", { 0x7C, 0x43, 0x46, 0xa9, 0xef, 0xe0, 0x4B, 0xFC, 0xB2, 0x29, 0x39, 0x3e, 0xde, 0x41, 0x5c, 0x85 }, asf_read_language_list, 1},
1034 { "Padding", { 0x18, 0x06, 0xD4, 0x74, 0xCA, 0xDF, 0x45, 0x09, 0xA4, 0xBA, 0x9A, 0xAB, 0xCB, 0x96, 0xAA, 0xE8 }, asf_read_unknown, 1 },
1035 { "DRMv1 Header", { 0x22, 0x11, 0xB3, 0xFB, 0xBD, 0x23, 0x11, 0xD2, 0xB4, 0xB7, 0x00, 0xA0, 0xC9, 0x55, 0xFC, 0x6E }, asf_read_unknown, 1 },
1036 { "DRMv2 Header", { 0x29, 0x8A, 0xE6, 0x14, 0x26, 0x22, 0x4C, 0x17, 0xB9, 0x35, 0xDA, 0xE0, 0x7E, 0xE9, 0x28, 0x9c }, asf_read_unknown, 1 },
1037 { "Index", { 0xD6, 0xE2, 0x29, 0xD3, 0x35, 0xDA, 0x11, 0xD1, 0x90, 0x34, 0x00, 0xA0, 0xC9, 0x03, 0x49, 0xBE }, asf_read_unknown, 1 },
1038 { "Media Object Index", { 0xFE, 0xB1, 0x03, 0xF8, 0x12, 0xAD, 0x4C, 0x64, 0x84, 0x0F, 0x2A, 0x1D, 0x2F, 0x7A, 0xD4, 0x8C }, asf_read_unknown, 1 },
1039 { "Timecode Index", { 0x3C, 0xB7, 0x3F, 0xD0, 0x0C, 0x4A, 0x48, 0x03, 0x95, 0x3D, 0xED, 0xF7, 0xB6, 0x22, 0x8F, 0x0C }, asf_read_unknown, 0 },
1040 { "Bitrate_Mutual_Exclusion", { 0xD6, 0xE2, 0x29, 0xDC, 0x35, 0xDA, 0x11, 0xD1, 0x90, 0x34, 0x00, 0xA0, 0xC9, 0x03, 0x49, 0xBE }, asf_read_unknown, 1 },
1041 { "Error Correction", { 0x75, 0xB2, 0x26, 0x35, 0x66, 0x8E, 0x11, 0xCF, 0xA6, 0xD9, 0x00, 0xAA, 0x00, 0x62, 0xCE, 0x6C }, asf_read_unknown, 1 },
1042 { "Content Branding", { 0x22, 0x11, 0xB3, 0xFA, 0xBD, 0x23, 0x11, 0xD2, 0xB4, 0xB7, 0x00, 0xA0, 0xC9, 0x55, 0xFC, 0x6E }, asf_read_unknown, 1 },
1043 { "Content Encryption", { 0x22, 0x11, 0xB3, 0xFB, 0xBD, 0x23, 0x11, 0xD2, 0xB4, 0xB7, 0x00, 0xA0, 0xC9, 0x55, 0xFC, 0x6E }, asf_read_unknown, 1 },
1044 { "Extended Content Encryption", { 0x29, 0x8A, 0xE6, 0x14, 0x26, 0x22, 0x4C, 0x17, 0xB9, 0x35, 0xDA, 0xE0, 0x7E, 0xE9, 0x28, 0x9C }, asf_read_unknown, 1 },
1045 { "Digital Signature", { 0x22, 0x11, 0xB3, 0xFC, 0xBD, 0x23, 0x11, 0xD2, 0xB4, 0xB7, 0x00, 0xA0, 0xC9, 0x55, 0xFC, 0x6E }, asf_read_unknown, 1 },
1046 { "Extended Stream Properties", { 0x14, 0xE6, 0xA5, 0xCB, 0xC6, 0x72, 0x43, 0x32, 0x83, 0x99, 0xA9, 0x69, 0x52, 0x06, 0x5B, 0x5A }, asf_read_ext_stream_properties, 1 },
1047 { "Advanced Mutual Exclusion", { 0xA0, 0x86, 0x49, 0xCF, 0x47, 0x75, 0x46, 0x70, 0x8A, 0x16, 0x6E, 0x35, 0x35, 0x75, 0x66, 0xCD }, asf_read_unknown, 1 },
1048 { "Group Mutual Exclusion", { 0xD1, 0x46, 0x5A, 0x40, 0x5A, 0x79, 0x43, 0x38, 0xB7, 0x1B, 0xE3, 0x6B, 0x8F, 0xD6, 0xC2, 0x49 }, asf_read_unknown, 1},
1049 { "Stream Prioritization", { 0xD4, 0xFE, 0xD1, 0x5B, 0x88, 0xD3, 0x45, 0x4F, 0x81, 0xF0, 0xED, 0x5C, 0x45, 0x99, 0x9E, 0x24 }, asf_read_unknown, 1 },
1050 { "Bandwidth Sharing Object", { 0xA6, 0x96, 0x09, 0xE6, 0x51, 0x7B, 0x11, 0xD2, 0xB6, 0xAF, 0x00, 0xC0, 0x4F, 0xD9, 0x08, 0xE9 }, asf_read_unknown, 1 },
1051 { "Metadata", { 0xC5, 0xF8, 0xCB, 0xEA, 0x5B, 0xAF, 0x48, 0x77, 0x84, 0x67, 0xAA, 0x8C, 0x44, 0xFA, 0x4C, 0xCA }, asf_read_metadata_obj, 1 },
1052 { "Metadata Library", { 0x44, 0x23, 0x1C, 0x94, 0x94, 0x98, 0x49, 0xD1, 0xA1, 0x41, 0x1D, 0x13, 0x4E, 0x45, 0x70, 0x54 }, asf_read_metadata_obj, 1 },
1053 { "Audio Spread", { 0xBF, 0xC3, 0xCD, 0x50, 0x61, 0x8F, 0x11, 0xCF, 0x8B, 0xB2, 0x00, 0xAA, 0x00, 0xB4, 0xE2, 0x20 }, asf_read_unknown, 1 },
1054 { "Index Parameters", { 0xD6, 0xE2, 0x29, 0xDF, 0x35, 0xDA, 0x11, 0xD1, 0x90, 0x34, 0x00, 0xA0, 0xC9, 0x03, 0x49, 0xBE }, asf_read_unknown, 1 },
1055 { "Content Encryption System Windows Media DRM Network Devices",
1056 { 0x7A, 0x07, 0x9B, 0xB6, 0xDA, 0XA4, 0x4e, 0x12, 0xA5, 0xCA, 0x91, 0xD3, 0x8D, 0xC1, 0x1A, 0x8D }, asf_read_unknown, 1 },
1057 { "Mutex Language", { 0xD6, 0xE2, 0x2A, 0x00, 0x25, 0xDA, 0x11, 0xD1, 0x90, 0x34, 0x00, 0xA0, 0xC9, 0x03, 0x49, 0xBE }, asf_read_unknown, 1 },
1058 { "Mutex Bitrate", { 0xD6, 0xE2, 0x2A, 0x01, 0x25, 0xDA, 0x11, 0xD1, 0x90, 0x34, 0x00, 0xA0, 0xC9, 0x03, 0x49, 0xBE }, asf_read_unknown, 1 },
1059 { "Mutex Unknown", { 0xD6, 0xE2, 0x2A, 0x02, 0x25, 0xDA, 0x11, 0xD1, 0x90, 0x34, 0x00, 0xA0, 0xC9, 0x03, 0x49, 0xBE }, asf_read_unknown, 1 },
1060 { "Bandwidth Sharing Exclusive", { 0xAF, 0x60, 0x60, 0xAA, 0x51, 0x97, 0x11, 0xD2, 0xB6, 0xAF, 0x00, 0xC0, 0x4F, 0xD9, 0x08, 0xE9 }, asf_read_unknown, 1 },
1061 { "Bandwidth Sharing Partial", { 0xAF, 0x60, 0x60, 0xAB, 0x51, 0x97, 0x11, 0xD2, 0xB6, 0xAF, 0x00, 0xC0, 0x4F, 0xD9, 0x08, 0xE9 }, asf_read_unknown, 1 },
1062 { "Payload Extension System Timecode", { 0x39, 0x95, 0x95, 0xEC, 0x86, 0x67, 0x4E, 0x2D, 0x8F, 0xDB, 0x98, 0x81, 0x4C, 0xE7, 0x6C, 0x1E }, asf_read_unknown, 1 },
1063 { "Payload Extension System File Name", { 0xE1, 0x65, 0xEC, 0x0E, 0x19, 0xED, 0x45, 0xD7, 0xB4, 0xA7, 0x25, 0xCB, 0xD1, 0xE2, 0x8E, 0x9B }, asf_read_unknown, 1 },
1064 { "Payload Extension System Content Type", { 0xD5, 0x90, 0xDC, 0x20, 0x07, 0xBC, 0x43, 0x6C, 0x9C, 0xF7, 0xF3, 0xBB, 0xFB, 0xF1, 0xA4, 0xDC }, asf_read_unknown, 1 },
1065 { "Payload Extension System Pixel Aspect Ratio", { 0x1, 0x1E, 0xE5, 0x54, 0xF9, 0xEA, 0x4B, 0xC8, 0x82, 0x1A, 0x37, 0x6B, 0x74, 0xE4, 0xC4, 0xB8 }, asf_read_unknown, 1 },
1066 { "Payload Extension System Sample Duration", { 0xC6, 0xBD, 0x94, 0x50, 0x86, 0x7F, 0x49, 0x07, 0x83, 0xA3, 0xC7, 0x79, 0x21, 0xB7, 0x33, 0xAD }, asf_read_unknown, 1 },
1067 { "Payload Extension System Encryption Sample ID", { 0x66, 0x98, 0xB8, 0x4E, 0x0A, 0xFA, 0x43, 0x30, 0xAE, 0xB2, 0x1C, 0x0A, 0x98, 0xD7, 0xA4, 0x4D }, asf_read_unknown, 1 },
1068 { "Payload Extension System Degradable JPEG", { 0x00, 0xE1, 0xAF, 0x06, 0x7B, 0xEC, 0x11, 0xD1, 0xA5, 0x82, 0x00, 0xC0, 0x4F, 0xC2, 0x9C, 0xFB }, asf_read_unknown, 1 },
1071 #define READ_LEN(flag, name, len) \
1073 if ((flag) == name ## IS_BYTE) \
1074 len = avio_r8(pb); \
1075 else if ((flag) == name ## IS_WORD) \
1076 len = avio_rl16(pb); \
1077 else if ((flag) == name ## IS_DWORD) \
1078 len = avio_rl32(pb); \
1083 static int asf_read_subpayload(AVFormatContext *s, AVPacket *pkt, int is_header)
1085 ASFContext *asf = s->priv_data;
1086 AVIOContext *pb = s->pb;
1091 asf->dts_delta = avio_r8(pb);
1092 if (asf->nb_mult_left) {
1093 asf->mult_sub_len = avio_rl16(pb); // total
1095 asf->sub_header_offset = avio_tell(pb);
1099 sub_len = avio_r8(pb);
1100 if ((ret = av_get_packet(pb, pkt, sub_len)) < 0) // each subpayload is entire frame
1102 for (i = 0; i < asf->nb_streams; i++) {
1103 if (asf->stream_index == asf->asf_st[i]->stream_index) {
1104 pkt->stream_index = asf->asf_st[i]->index;
1108 asf->return_subpayload = 1;
1110 asf->return_subpayload = 0;
1114 pkt->dts = asf->sub_dts + (asf->nb_sub - 1) * asf->dts_delta - asf->preroll;
1115 if (asf->nb_mult_left && (avio_tell(pb) >=
1116 (asf->sub_header_offset + asf->mult_sub_len))) {
1118 asf->nb_mult_left--;
1120 if (avio_tell(pb) >= asf->packet_offset + asf->packet_size - asf->pad_len) {
1122 if (!asf->nb_mult_left) {
1123 avio_skip(pb, asf->pad_len);
1124 if (avio_tell(pb) != asf->packet_offset + asf->packet_size) {
1125 if (!asf->packet_size)
1126 return AVERROR_INVALIDDATA;
1127 av_log(s, AV_LOG_WARNING,
1128 "Position %"PRId64" wrong, should be %"PRId64"\n",
1129 avio_tell(pb), asf->packet_offset + asf->packet_size);
1130 avio_seek(pb, asf->packet_offset + asf->packet_size, SEEK_SET);
1138 static void reset_packet(ASFPacket *asf_pkt)
1140 asf_pkt->size_left = 0;
1141 asf_pkt->data_size = 0;
1142 asf_pkt->duration = 0;
1145 av_packet_unref(asf_pkt->avpkt);
1148 static int asf_read_replicated_data(AVFormatContext *s, ASFPacket *asf_pkt)
1150 ASFContext *asf = s->priv_data;
1151 AVIOContext *pb = s->pb;
1154 if (!asf_pkt->data_size) {
1155 data_size = avio_rl32(pb); // read media object size
1157 return AVERROR_INVALIDDATA;
1158 if ((ret = av_new_packet(asf_pkt->avpkt, data_size)) < 0)
1160 asf_pkt->data_size = asf_pkt->size_left = data_size;
1162 avio_skip(pb, 4); // reading of media object size is already done
1163 asf_pkt->dts = avio_rl32(pb); // read presentation time
1164 if (asf->rep_data_len >= 8)
1165 avio_skip(pb, asf->rep_data_len - 8); // skip replicated data
1170 static int asf_read_multiple_payload(AVFormatContext *s, AVPacket *pkt,
1173 ASFContext *asf = s->priv_data;
1174 AVIOContext *pb = s->pb;
1180 // if replicated length is 1, subpayloads are present
1181 if (asf->rep_data_len == 1) {
1183 asf->state = READ_MULTI_SUB;
1184 pkt->flags = asf_pkt->flags;
1185 if ((ret = asf_read_subpayload(s, pkt, 1)) < 0)
1188 if (asf->rep_data_len)
1189 if ((ret = asf_read_replicated_data(s, asf_pkt)) < 0)
1191 pay_len = avio_rl16(pb); // payload length should be WORD
1192 if (pay_len > asf->packet_size) {
1193 av_log(s, AV_LOG_ERROR,
1194 "Error: invalid data packet size, pay_len %"PRIu16", "
1195 "asf->packet_size %"PRIu32", offset %"PRId64".\n",
1196 pay_len, asf->packet_size, avio_tell(pb));
1197 return AVERROR_INVALIDDATA;
1199 p = asf_pkt->avpkt->data + asf_pkt->data_size - asf_pkt->size_left;
1200 if (pay_len > asf_pkt->size_left) {
1201 av_log(s, AV_LOG_ERROR,
1202 "Error: invalid buffer size, pay_len %d, data size left %d.\n",
1203 pay_len, asf_pkt->size_left);
1204 skip = pay_len - asf_pkt->size_left;
1205 pay_len = asf_pkt->size_left;
1207 if (asf_pkt->size_left <= 0)
1208 return AVERROR_INVALIDDATA;
1209 if ((ret = avio_read(pb, p, pay_len)) < 0)
1211 if (s->key && s->keylen == 20)
1212 ff_asfcrypt_dec(s->key, p, ret);
1213 avio_skip(pb, skip);
1214 asf_pkt->size_left -= pay_len;
1215 asf->nb_mult_left--;
1221 static int asf_read_single_payload(AVFormatContext *s, ASFPacket *asf_pkt)
1223 ASFContext *asf = s->priv_data;
1224 AVIOContext *pb = s->pb;
1230 if (!asf_pkt->data_size) {
1231 data_size = avio_rl32(pb); // read media object size
1234 if ((ret = av_new_packet(asf_pkt->avpkt, data_size)) < 0)
1236 asf_pkt->data_size = asf_pkt->size_left = data_size;
1238 avio_skip(pb, 4); // skip media object size
1239 asf_pkt->dts = avio_rl32(pb); // read presentation time
1240 if (asf->rep_data_len >= 8)
1241 avio_skip(pb, asf->rep_data_len - 8); // skip replicated data
1242 offset = avio_tell(pb);
1244 // size of the payload - size of the packet without header and padding
1245 if (asf->packet_size_internal)
1246 size = asf->packet_size_internal - offset + asf->packet_offset - asf->pad_len;
1248 size = asf->packet_size - offset + asf->packet_offset - asf->pad_len;
1249 if (size > asf->packet_size) {
1250 av_log(s, AV_LOG_ERROR,
1251 "Error: invalid data packet size, offset %"PRId64".\n",
1253 return AVERROR_INVALIDDATA;
1255 p = asf_pkt->avpkt->data + asf_pkt->data_size - asf_pkt->size_left;
1256 if (size > asf_pkt->size_left || asf_pkt->size_left <= 0)
1257 return AVERROR_INVALIDDATA;
1258 if (asf_pkt->size_left > size)
1259 asf_pkt->size_left -= size;
1261 asf_pkt->size_left = 0;
1262 if ((ret = avio_read(pb, p, size)) < 0)
1264 if (s->key && s->keylen == 20)
1265 ff_asfcrypt_dec(s->key, p, ret);
1266 if (asf->packet_size_internal)
1267 avio_skip(pb, asf->packet_size - asf->packet_size_internal);
1268 avio_skip(pb, asf->pad_len); // skip padding
1273 static int asf_read_payload(AVFormatContext *s, AVPacket *pkt)
1275 ASFContext *asf = s->priv_data;
1276 AVIOContext *pb = s->pb;
1278 ASFPacket *asf_pkt = NULL;
1280 if (!asf->sub_left) {
1281 uint32_t off_len, media_len;
1284 stream_num = avio_r8(pb);
1285 asf->stream_index = stream_num & ASF_STREAM_NUM;
1286 for (i = 0; i < asf->nb_streams; i++) {
1287 if (asf->stream_index == asf->asf_st[i]->stream_index) {
1288 asf_pkt = &asf->asf_st[i]->pkt;
1289 asf_pkt->stream_index = asf->asf_st[i]->index;
1294 if (asf->packet_offset + asf->packet_size <= asf->data_offset + asf->data_size) {
1295 if (!asf->packet_size) {
1296 av_log(s, AV_LOG_ERROR, "Invalid packet size 0.\n");
1297 return AVERROR_INVALIDDATA;
1299 avio_seek(pb, asf->packet_offset + asf->packet_size, SEEK_SET);
1300 av_log(s, AV_LOG_WARNING, "Skipping the stream with the invalid stream index %d.\n",
1302 return AVERROR(EAGAIN);
1304 return AVERROR_INVALIDDATA;
1307 if (stream_num >> 7)
1308 asf_pkt->flags |= AV_PKT_FLAG_KEY;
1309 READ_LEN(asf->prop_flags & ASF_PL_MASK_MEDIA_OBJECT_NUMBER_LENGTH_FIELD_SIZE,
1310 ASF_PL_FLAG_MEDIA_OBJECT_NUMBER_LENGTH_FIELD_, media_len);
1311 READ_LEN(asf->prop_flags & ASF_PL_MASK_OFFSET_INTO_MEDIA_OBJECT_LENGTH_FIELD_SIZE,
1312 ASF_PL_FLAG_OFFSET_INTO_MEDIA_OBJECT_LENGTH_FIELD_, off_len);
1313 READ_LEN(asf->prop_flags & ASF_PL_MASK_REPLICATED_DATA_LENGTH_FIELD_SIZE,
1314 ASF_PL_FLAG_REPLICATED_DATA_LENGTH_FIELD_, asf->rep_data_len);
1315 if (asf_pkt->size_left && (asf_pkt->frame_num != media_len)) {
1316 av_log(s, AV_LOG_WARNING, "Unfinished frame will be ignored\n");
1317 reset_packet(asf_pkt);
1319 asf_pkt->frame_num = media_len;
1320 asf->sub_dts = off_len;
1321 if (asf->nb_mult_left) {
1322 if ((ret = asf_read_multiple_payload(s, pkt, asf_pkt)) < 0)
1324 } else if (asf->rep_data_len == 1) {
1326 asf->state = READ_SINGLE;
1327 pkt->flags = asf_pkt->flags;
1328 if ((ret = asf_read_subpayload(s, pkt, 1)) < 0)
1331 if ((ret = asf_read_single_payload(s, asf_pkt)) < 0)
1335 for (i = 0; i <= asf->nb_streams; i++) {
1336 if (asf->stream_index == asf->asf_st[i]->stream_index) {
1337 asf_pkt = &asf->asf_st[i]->pkt;
1342 return AVERROR_INVALIDDATA;
1343 pkt->flags = asf_pkt->flags;
1344 pkt->dts = asf_pkt->dts;
1345 pkt->stream_index = asf->asf_st[i]->index;
1346 if ((ret = asf_read_subpayload(s, pkt, 0)) < 0) // read subpayload without its header
1353 static int asf_read_packet_header(AVFormatContext *s)
1355 ASFContext *asf = s->priv_data;
1356 AVIOContext *pb = s->pb;
1358 uint32_t av_unused seq;
1359 unsigned char error_flags, len_flags, pay_flags;
1361 asf->packet_offset = avio_tell(pb);
1362 error_flags = avio_r8(pb); // read Error Correction Flags
1363 if (error_flags & ASF_PACKET_FLAG_ERROR_CORRECTION_PRESENT) {
1364 if (!(error_flags & ASF_ERROR_CORRECTION_LENGTH_TYPE)) {
1365 size = error_flags & ASF_PACKET_ERROR_CORRECTION_DATA_SIZE;
1366 avio_skip(pb, size);
1368 len_flags = avio_r8(pb);
1370 len_flags = error_flags;
1371 asf->prop_flags = avio_r8(pb);
1372 READ_LEN(len_flags & ASF_PPI_MASK_PACKET_LENGTH_FIELD_SIZE,
1373 ASF_PPI_FLAG_PACKET_LENGTH_FIELD_, asf->packet_size_internal);
1374 READ_LEN(len_flags & ASF_PPI_MASK_SEQUENCE_FIELD_SIZE,
1375 ASF_PPI_FLAG_SEQUENCE_FIELD_, seq);
1376 READ_LEN(len_flags & ASF_PPI_MASK_PADDING_LENGTH_FIELD_SIZE,
1377 ASF_PPI_FLAG_PADDING_LENGTH_FIELD_, asf->pad_len );
1378 asf->send_time = avio_rl32(pb); // send time
1379 avio_skip(pb, 2); // skip duration
1380 if (len_flags & ASF_PPI_FLAG_MULTIPLE_PAYLOADS_PRESENT) { // Multiple Payloads present
1381 pay_flags = avio_r8(pb);
1382 asf->nb_mult_left = (pay_flags & ASF_NUM_OF_PAYLOADS);
1388 static int asf_deinterleave(AVFormatContext *s, ASFPacket *asf_pkt, int st_num)
1390 ASFContext *asf = s->priv_data;
1391 ASFStream *asf_st = asf->asf_st[st_num];
1392 unsigned char *p = asf_pkt->avpkt->data;
1393 uint16_t pkt_len = asf->asf_st[st_num]->virtual_pkt_len;
1394 uint16_t chunk_len = asf->asf_st[st_num]->virtual_chunk_len;
1395 int nchunks = pkt_len / chunk_len;
1397 int pos = 0, j, l, ret;
1400 data = av_malloc(asf_pkt->data_size + AV_INPUT_BUFFER_PADDING_SIZE);
1402 return AVERROR(ENOMEM);
1403 memset(data + asf_pkt->data_size, 0, AV_INPUT_BUFFER_PADDING_SIZE);
1405 while (asf_pkt->data_size >= asf_st->span * pkt_len + pos) {
1406 if (pos >= asf_pkt->data_size) {
1409 for (l = 0; l < pkt_len; l++) {
1410 if (pos >= asf_pkt->data_size) {
1413 for (j = 0; j < asf_st->span; j++) {
1414 if ((pos + chunk_len) >= asf_pkt->data_size)
1417 p + (j * nchunks + l) * chunk_len,
1422 p += asf_st->span * pkt_len;
1423 if (p > asf_pkt->avpkt->data + asf_pkt->data_size)
1426 av_packet_unref(asf_pkt->avpkt);
1427 ret = av_packet_from_data(asf_pkt->avpkt, data, asf_pkt->data_size);
1434 static int asf_read_packet(AVFormatContext *s, AVPacket *pkt)
1436 ASFContext *asf = s->priv_data;
1437 AVIOContext *pb = s->pb;
1440 if ((avio_tell(pb) >= asf->data_offset + asf->data_size) &&
1441 !(asf->b_flags & ASF_FLAG_BROADCAST))
1443 while (!pb->eof_reached) {
1444 if (asf->state == PARSE_PACKET_HEADER) {
1445 asf_read_packet_header(s);
1446 if (pb->eof_reached)
1448 if (!asf->nb_mult_left)
1449 asf->state = READ_SINGLE;
1451 asf->state = READ_MULTI;
1453 ret = asf_read_payload(s, pkt);
1454 if (ret == AVERROR(EAGAIN)) {
1455 asf->state = PARSE_PACKET_HEADER;
1461 switch (asf->state) {
1464 asf->state = PARSE_PACKET_HEADER;
1466 case READ_MULTI_SUB:
1467 if (!asf->sub_left && !asf->nb_mult_left) {
1468 asf->state = PARSE_PACKET_HEADER;
1469 if (!asf->return_subpayload &&
1470 (avio_tell(pb) <= asf->packet_offset +
1471 asf->packet_size - asf->pad_len))
1472 avio_skip(pb, asf->pad_len); // skip padding
1473 if (asf->packet_offset + asf->packet_size > avio_tell(pb))
1474 avio_seek(pb, asf->packet_offset + asf->packet_size, SEEK_SET);
1475 } else if (!asf->sub_left)
1476 asf->state = READ_MULTI;
1479 if (!asf->nb_mult_left) {
1480 asf->state = PARSE_PACKET_HEADER;
1481 if (!asf->return_subpayload &&
1482 (avio_tell(pb) <= asf->packet_offset +
1483 asf->packet_size - asf->pad_len))
1484 avio_skip(pb, asf->pad_len); // skip padding
1485 if (asf->packet_offset + asf->packet_size > avio_tell(pb))
1486 avio_seek(pb, asf->packet_offset + asf->packet_size, SEEK_SET);
1490 if (asf->return_subpayload) {
1491 asf->return_subpayload = 0;
1494 for (i = 0; i < asf->nb_streams; i++) {
1495 ASFPacket *asf_pkt = &asf->asf_st[i]->pkt;
1496 if (asf_pkt && !asf_pkt->size_left && asf_pkt->data_size) {
1497 if (asf->asf_st[i]->span > 1 &&
1498 asf->asf_st[i]->type == AVMEDIA_TYPE_AUDIO)
1499 if ((ret = asf_deinterleave(s, asf_pkt, i)) < 0)
1501 av_packet_move_ref(pkt, asf_pkt->avpkt);
1502 pkt->stream_index = asf->asf_st[i]->index;
1503 pkt->flags = asf_pkt->flags;
1504 pkt->dts = asf_pkt->dts - asf->preroll;
1505 asf_pkt->data_size = 0;
1506 asf_pkt->frame_num = 0;
1512 if (pb->eof_reached)
1518 static int asf_read_close(AVFormatContext *s)
1520 ASFContext *asf = s->priv_data;
1523 for (i = 0; i < ASF_MAX_STREAMS; i++) {
1524 av_dict_free(&asf->asf_sd[i].asf_met);
1525 if (i < asf->nb_streams) {
1526 av_packet_free(&asf->asf_st[i]->pkt.avpkt);
1527 av_freep(&asf->asf_st[i]);
1531 asf->nb_streams = 0;
1535 static void reset_packet_state(AVFormatContext *s)
1537 ASFContext *asf = s->priv_data;
1540 asf->state = PARSE_PACKET_HEADER;
1542 asf->return_subpayload = 0;
1544 asf->sub_header_offset = 0;
1545 asf->packet_offset = asf->first_packet_offset;
1547 asf->rep_data_len = 0;
1549 asf->mult_sub_len = 0;
1550 asf->nb_mult_left = 0;
1552 asf->prop_flags = 0;
1554 for (i = 0; i < asf->nb_streams; i++) {
1555 ASFPacket *pkt = &asf->asf_st[i]->pkt;
1561 * Find a timestamp for the requested position within the payload
1562 * where the pos (position) is the offset inside the Data Object.
1563 * When position is not on the packet boundary, asf_read_timestamp tries
1564 * to find the closest packet offset after this position. If this packet
1565 * is a key frame, this packet timestamp is read and an index entry is created
1566 * for the packet. If this packet belongs to the requested stream,
1567 * asf_read_timestamp upgrades pos to the packet beginning offset and
1568 * returns this packet's dts. So returned dts is the dts of the first key frame with
1569 * matching stream number after given position.
1571 static int64_t asf_read_timestamp(AVFormatContext *s, int stream_index,
1572 int64_t *pos, int64_t pos_limit)
1574 ASFContext *asf = s->priv_data;
1575 int64_t pkt_pos = *pos, pkt_offset, dts = AV_NOPTS_VALUE, data_end;
1576 AVPacket *pkt = av_packet_alloc();
1580 return AVERROR(ENOMEM);
1582 data_end = asf->data_offset + asf->data_size;
1584 n = (pkt_pos - asf->first_packet_offset + asf->packet_size - 1) /
1586 n = av_clip(n, 0, ((data_end - asf->first_packet_offset) / asf->packet_size - 1));
1587 pkt_pos = asf->first_packet_offset + n * asf->packet_size;
1589 avio_seek(s->pb, pkt_pos, SEEK_SET);
1590 pkt_offset = pkt_pos;
1592 reset_packet_state(s);
1593 while (avio_tell(s->pb) < data_end) {
1595 int i, ret, st_found;
1597 pkt_offset = avio_tell(s->pb);
1598 if ((ret = asf_read_packet(s, pkt)) < 0) {
1599 av_packet_free(&pkt);
1600 dts = AV_NOPTS_VALUE;
1603 // ASFPacket may contain fragments of packets belonging to different streams,
1604 // pkt_offset is the offset of the first fragment within it.
1605 if ((pkt_offset >= (pkt_pos + asf->packet_size)))
1606 pkt_pos += asf->packet_size;
1607 for (i = 0; i < asf->nb_streams; i++) {
1608 ASFStream *st = asf->asf_st[i];
1611 if (pkt->flags & AV_PKT_FLAG_KEY) {
1614 av_add_index_entry(s->streams[pkt->stream_index], pkt_pos,
1615 dts, pkt->size, 0, AVINDEX_KEYFRAME);
1616 if (stream_index == st->index) {
1625 av_packet_unref(pkt);
1629 av_packet_free(&pkt);
1633 static int asf_read_seek(AVFormatContext *s, int stream_index,
1634 int64_t timestamp, int flags)
1636 ASFContext *asf = s->priv_data;
1639 if (s->streams[stream_index]->internal->nb_index_entries && asf->is_simple_index) {
1640 idx = av_index_search_timestamp(s->streams[stream_index], timestamp, flags);
1641 if (idx < 0 || idx >= s->streams[stream_index]->internal->nb_index_entries)
1642 return AVERROR_INVALIDDATA;
1643 avio_seek(s->pb, s->streams[stream_index]->internal->index_entries[idx].pos, SEEK_SET);
1645 if ((ret = ff_seek_frame_binary(s, stream_index, timestamp, flags)) < 0)
1649 reset_packet_state(s);
1654 static const GUIDParseTable *find_guid(ff_asf_guid guid)
1657 const GUIDParseTable *g;
1661 for (j = 0; j < FF_ARRAY_ELEMS(gdef); j++) {
1662 if (!(ret = memcmp(guid, g->guid, sizeof(g->guid))))
1670 static int detect_unknown_subobject(AVFormatContext *s, int64_t offset, int64_t size)
1672 ASFContext *asf = s->priv_data;
1673 AVIOContext *pb = s->pb;
1674 const GUIDParseTable *g = NULL;
1678 if (offset > INT64_MAX - size)
1679 return AVERROR_INVALIDDATA;
1681 while (avio_tell(pb) <= offset + size) {
1682 if (avio_tell(pb) == asf->offset)
1684 asf->offset = avio_tell(pb);
1685 if ((ret = ff_get_guid(pb, &guid)) < 0)
1687 g = find_guid(guid);
1689 if ((ret = g->read_object(s, g)) < 0)
1694 g2.name = "Unknown";
1695 g2.is_subobject = 1;
1696 asf_read_unknown(s, &g2);
1703 static int asf_read_header(AVFormatContext *s)
1705 ASFContext *asf = s->priv_data;
1706 AVIOContext *pb = s->pb;
1707 const GUIDParseTable *g = NULL;
1713 asf->is_simple_index = 0;
1714 ff_get_guid(pb, &guid);
1715 if (ff_guidcmp(&guid, &ff_asf_header))
1716 return AVERROR_INVALIDDATA;
1717 avio_skip(pb, 8); // skip header object size
1718 avio_skip(pb, 6); // skip number of header objects and 2 reserved bytes
1719 asf->data_reached = 0;
1721 /* 1 is here instead of pb->eof_reached because (when not streaming), Data are skipped
1722 * for the first time,
1723 * Index object is processed and got eof and then seeking back to the Data is performed.
1726 // for the cases when object size is invalid
1727 if (avio_tell(pb) == asf->offset)
1729 asf->offset = avio_tell(pb);
1730 if ((ret = ff_get_guid(pb, &guid)) < 0) {
1731 if (ret == AVERROR_EOF && asf->data_reached)
1736 g = find_guid(guid);
1738 asf->unknown_offset = asf->offset;
1740 if ((ret = g->read_object(s, g)) < 0)
1743 size = avio_rl64(pb);
1744 align_position(pb, asf->offset, size);
1746 if (asf->data_reached &&
1747 (!(pb->seekable & AVIO_SEEKABLE_NORMAL) ||
1748 (asf->b_flags & ASF_FLAG_BROADCAST)))
1752 if (!asf->data_reached) {
1753 av_log(s, AV_LOG_ERROR, "Data Object was not found.\n");
1754 ret = AVERROR_INVALIDDATA;
1757 if (pb->seekable & AVIO_SEEKABLE_NORMAL)
1758 avio_seek(pb, asf->first_packet_offset, SEEK_SET);
1760 for (i = 0; i < asf->nb_streams; i++) {
1761 const char *rfc1766 = asf->asf_sd[asf->asf_st[i]->lang_idx].langs;
1762 AVStream *st = s->streams[asf->asf_st[i]->index];
1763 set_language(s, rfc1766, &st->metadata);
1766 for (i = 0; i < ASF_MAX_STREAMS; i++) {
1767 AVStream *st = NULL;
1769 st = find_stream(s, i);
1771 av_dict_copy(&st->metadata, asf->asf_sd[i].asf_met, AV_DICT_IGNORE_SUFFIX);
1772 if (asf->asf_sd[i].aspect_ratio.num > 0 && asf->asf_sd[i].aspect_ratio.den > 0) {
1773 st->sample_aspect_ratio.num = asf->asf_sd[i].aspect_ratio.num;
1774 st->sample_aspect_ratio.den = asf->asf_sd[i].aspect_ratio.den;
1786 AVInputFormat ff_asf_o_demuxer = {
1788 .long_name = NULL_IF_CONFIG_SMALL("ASF (Advanced / Active Streaming Format)"),
1789 .priv_data_size = sizeof(ASFContext),
1790 .read_probe = asf_probe,
1791 .read_header = asf_read_header,
1792 .read_packet = asf_read_packet,
1793 .read_close = asf_read_close,
1794 .read_timestamp = asf_read_timestamp,
1795 .read_seek = asf_read_seek,
1796 .flags = AVFMT_NOBINSEARCH | AVFMT_NOGENSEARCH,