2 * Microsoft Advanced Streaming Format demuxer
3 * Copyright (c) 2014 Alexandra Hájková
5 * This file is part of Libav.
7 * Libav 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 * Libav 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 Libav; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
22 #include "libavutil/attributes.h"
23 #include "libavutil/avassert.h"
24 #include "libavutil/avstring.h"
25 #include "libavutil/bswap.h"
26 #include "libavutil/common.h"
27 #include "libavutil/dict.h"
28 #include "libavutil/internal.h"
29 #include "libavutil/mathematics.h"
30 #include "libavutil/opt.h"
31 #include "libavutil/time_internal.h"
34 #include "avio_internal.h"
35 #include "avlanguage.h"
47 #define ASF_UNICODE 0x0
48 #define ASF_FLAG_BROADCAST 0x1
49 #define ASF_BYTE_ARRAY 0x1
50 #define ASF_TYPE_AUDIO 0x2
51 #define ASF_TYPE_VIDEO 0x1
52 #define ASF_STREAM_NUM 0x7F
53 #define ASF_MAX_STREAMS 128
54 #define BMP_HEADER_SIZE 40
55 #define ASF_NUM_OF_PAYLOADS 0x3F
56 #define ASF_ERROR_CORRECTION_LENGTH_TYPE 0x60
57 #define ASF_PACKET_ERROR_CORRECTION_DATA_SIZE 0x2
59 typedef struct GUIDParseTable {
62 int (*read_object)(AVFormatContext *, const struct GUIDParseTable *);
66 typedef struct ASFPacket {
69 uint32_t frame_num; // ASF payloads with the same number are parts of the same frame
77 typedef struct ASFStream {
78 uint8_t stream_index; // from packet header
79 int index; // stream index in AVFormatContext, set in asf_read_stream_properties
81 int indexed; // added index entries from the Simple Index Object or not
82 int8_t span; // for deinterleaving
83 uint16_t virtual_pkt_len;
84 uint16_t virtual_chunk_len;
89 typedef struct ASFStreamData{
91 AVDictionary *asf_met; // for storing per-stream metadata
92 AVRational aspect_ratio;
95 typedef struct ASFContext {
97 int is_simple_index; // is simple index present or not 1/0
101 uint64_t nb_packets; // ASF packets
102 uint32_t packet_size;
106 uint32_t b_flags; // flags with broadcast flag
107 uint32_t prop_flags; // file properties object flags
109 uint64_t data_size; // data object size
110 uint64_t unknown_size; // size of the unknown object
112 int64_t offset; // offset of the current object
115 int64_t first_packet_offset; // packet offset
116 int64_t unknown_offset; // for top level header objects or subobjects without specified behavior
118 // ASF file must not contain more than 128 streams according to the specification
119 ASFStream *asf_st[ASF_MAX_STREAMS];
120 ASFStreamData asf_sd[ASF_MAX_STREAMS];
123 int stream_index; // from packet header, for the subpayload case
125 // packet parameteres
126 uint64_t sub_header_offset; // offset of subplayload header
128 uint8_t dts_delta; // for subpayloads
129 uint32_t packet_size_internal; // packet size stored inside ASFPacket, can be 0
130 int64_t packet_offset; // offset of the current packet inside Data Object
131 uint32_t pad_len; // padding after payload
132 uint32_t rep_data_len;
135 uint64_t sub_left; // subpayloads left or not
136 unsigned int nb_sub; // number of subpayloads read so far from the current ASF packet
137 uint16_t mult_sub_len; // total length of subpayloads array inside multiple payload
138 uint64_t nb_mult_left; // multiple payloads left
139 int return_subpayload;
148 static int detect_unknown_subobject(AVFormatContext *s, int64_t offset, int64_t size);
149 static const GUIDParseTable *find_guid(ff_asf_guid guid);
151 static int asf_probe(AVProbeData *pd)
153 /* check file header */
154 if (!ff_guidcmp(pd->buf, &ff_asf_header))
155 return AVPROBE_SCORE_MAX;
160 static void swap_guid(ff_asf_guid guid)
162 FFSWAP(unsigned char, guid[0], guid[3]);
163 FFSWAP(unsigned char, guid[1], guid[2]);
164 FFSWAP(unsigned char, guid[4], guid[5]);
165 FFSWAP(unsigned char, guid[6], guid[7]);
168 static void align_position(AVIOContext *pb, int64_t offset, uint64_t size)
170 if (avio_tell(pb) != offset + size)
171 avio_seek(pb, offset + size, SEEK_SET);
174 static int asf_read_unknown(AVFormatContext *s, const GUIDParseTable *g)
176 ASFContext *asf = s->priv_data;
177 AVIOContext *pb = s->pb;
178 uint64_t size = avio_rl64(pb);
181 if (size > INT64_MAX)
182 return AVERROR_INVALIDDATA;
185 asf->unknown_size = size;
187 if (!g->is_subobject) {
188 if (!(ret = strcmp(g->name, "Header Extension")))
189 avio_skip(pb, 22); // skip reserved fields and Data Size
190 if ((ret = detect_unknown_subobject(s, asf->unknown_offset,
191 asf->unknown_size)) < 0)
194 avio_skip(pb, size - 24);
199 static int get_asf_string(AVIOContext *pb, int maxlen, char *buf, int buflen)
204 return AVERROR(EINVAL);
205 while (ret + 1 < maxlen) {
208 GET_UTF16(ch, (ret += 2) <= maxlen ? avio_rl16(pb) : 0, break;);
209 PUT_UTF8(ch, tmp, if (q - buf < buflen - 1) *q++ = tmp;)
216 static int asf_read_marker(AVFormatContext *s, const GUIDParseTable *g)
218 ASFContext *asf = s->priv_data;
219 AVIOContext *pb = s->pb;
220 uint64_t size = avio_rl64(pb);
221 int i, nb_markers, ret;
226 avio_skip(pb, 8); // skip reserved GUID
227 nb_markers = avio_rl32(pb);
228 avio_skip(pb, 2); // skip reserved field
230 for (i = 0; i < len; i++)
233 for (i = 0; i < nb_markers; i++) {
238 pts -= asf->preroll * 10000;
239 avio_skip(pb, 2); // entry length
240 avio_skip(pb, 4); // send time
241 avio_skip(pb, 4); // flags
244 if ((ret = avio_get_str16le(pb, len, name,
245 sizeof(name))) < len)
246 avio_skip(pb, len - ret);
247 avpriv_new_chapter(s, i, (AVRational) { 1, 10000000 }, pts,
248 AV_NOPTS_VALUE, name);
250 align_position(pb, asf->offset, size);
255 static int asf_read_metadata(AVFormatContext *s, const char *title, uint16_t len,
256 unsigned char *ch, uint16_t buflen)
258 AVIOContext *pb = s->pb;
260 avio_get_str16le(pb, len, ch, buflen);
262 if (av_dict_set(&s->metadata, title, ch, 0) < 0)
263 av_log(s, AV_LOG_WARNING, "av_dict_set failed.\n");
269 static int asf_read_value(AVFormatContext *s, const uint8_t *name,
270 uint16_t val_len, int type, AVDictionary **met)
274 uint16_t buflen = 2 * val_len + 1;
275 AVIOContext *pb = s->pb;
277 value = av_malloc(buflen);
279 return AVERROR(ENOMEM);
280 if (type == ASF_UNICODE) {
281 // get_asf_string reads UTF-16 and converts it to UTF-8 which needs longer buffer
282 if ((ret = get_asf_string(pb, val_len, value, buflen)) < 0)
284 if (av_dict_set(met, name, value, 0) < 0)
285 av_log(s, AV_LOG_WARNING, "av_dict_set failed.\n");
288 if (val_len > sizeof(buf)) {
289 ret = AVERROR_INVALIDDATA;
292 if ((ret = avio_read(pb, value, val_len)) < 0)
294 if (ret < 2 * val_len)
297 value[2 * val_len - 1] = '\0';
298 snprintf(buf, sizeof(buf), "%s", value);
299 if (av_dict_set(met, name, buf, 0) < 0)
300 av_log(s, AV_LOG_WARNING, "av_dict_set failed.\n");
310 static int asf_read_generic_value(AVIOContext *pb, int type, uint64_t *value)
315 *value = avio_rl16(pb);
318 *value = avio_rl32(pb);
321 *value = avio_rl64(pb);
324 *value = avio_rl16(pb);
327 return AVERROR_INVALIDDATA;
333 static int asf_set_metadata(AVFormatContext *s, const uint8_t *name,
334 int type, AVDictionary **met)
336 AVIOContext *pb = s->pb;
341 ret = asf_read_generic_value(pb, type, &value);
345 snprintf(buf, sizeof(buf), "%"PRIu64, value);
346 if (av_dict_set(met, name, buf, 0) < 0)
347 av_log(s, AV_LOG_WARNING, "av_dict_set failed.\n");
352 /* MSDN claims that this should be "compatible with the ID3 frame, APIC",
353 * but in reality this is only loosely similar */
354 static int asf_read_picture(AVFormatContext *s, int len)
356 ASFContext *asf = s->priv_data;
357 AVPacket pkt = { 0 };
358 const CodecMime *mime = ff_id3v2_mime_tags;
359 enum AVCodecID id = AV_CODEC_ID_NONE;
361 uint8_t *desc = NULL;
363 int ret, type, picsize, desc_len;
366 /* type + picsize + mime + desc */
367 if (len < 1 + 4 + 2 + 2) {
368 av_log(s, AV_LOG_ERROR, "Invalid attached picture size: %d.\n", len);
369 return AVERROR_INVALIDDATA;
373 type = avio_r8(s->pb);
375 if (type >= FF_ARRAY_ELEMS(ff_id3v2_picture_types) || type < 0) {
376 av_log(s, AV_LOG_WARNING, "Unknown attached picture type: %d.\n", type);
380 /* picture data size */
381 picsize = avio_rl32(s->pb);
384 /* picture MIME type */
385 len -= avio_get_str16le(s->pb, len, mimetype, sizeof(mimetype));
386 while (mime->id != AV_CODEC_ID_NONE) {
387 if (!strncmp(mime->str, mimetype, sizeof(mimetype))) {
393 if (id == AV_CODEC_ID_NONE) {
394 av_log(s, AV_LOG_ERROR, "Unknown attached picture mimetype: %s.\n",
399 if (picsize >= len) {
400 av_log(s, AV_LOG_ERROR, "Invalid attached picture data size: %d >= %d.\n",
402 return AVERROR_INVALIDDATA;
405 /* picture description */
406 desc_len = (len - picsize) * 2 + 1;
407 desc = av_malloc(desc_len);
409 return AVERROR(ENOMEM);
410 len -= avio_get_str16le(s->pb, len - picsize, desc, desc_len);
412 ret = av_get_packet(s->pb, &pkt, picsize);
416 st = avformat_new_stream(s, NULL);
418 ret = AVERROR(ENOMEM);
421 asf->asf_st[asf->nb_streams] = av_mallocz(sizeof(*asf_st));
422 asf_st = asf->asf_st[asf->nb_streams];
424 ret = AVERROR(ENOMEM);
428 st->disposition |= AV_DISPOSITION_ATTACHED_PIC;
429 st->codec->codec_type = asf_st->type = AVMEDIA_TYPE_VIDEO;
430 st->codec->codec_id = id;
431 st->attached_pic = pkt;
432 st->attached_pic.stream_index = asf_st->index = st->index;
433 st->attached_pic.flags |= AV_PKT_FLAG_KEY;
438 if (av_dict_set(&st->metadata, "title", desc, AV_DICT_DONT_STRDUP_VAL) < 0)
439 av_log(s, AV_LOG_WARNING, "av_dict_set failed.\n");
443 if (av_dict_set(&st->metadata, "comment", ff_id3v2_picture_types[type], 0) < 0)
444 av_log(s, AV_LOG_WARNING, "av_dict_set failed.\n");
450 av_packet_unref(&pkt);
454 static void get_id3_tag(AVFormatContext *s)
456 ID3v2ExtraMeta *id3v2_extra_meta = NULL;
458 ff_id3v2_read(s, ID3v2_DEFAULT_MAGIC, &id3v2_extra_meta);
459 if (id3v2_extra_meta)
460 ff_id3v2_parse_apic(s, &id3v2_extra_meta);
461 ff_id3v2_free_extra_meta(&id3v2_extra_meta);
464 static int process_metadata(AVFormatContext *s, const uint8_t *name, uint16_t name_len,
465 uint16_t val_len, uint16_t type, AVDictionary **met)
473 asf_read_value(s, name, val_len, type, met);
476 if (!strcmp(name, "WM/Picture")) // handle cover art
477 asf_read_picture(s, val_len);
478 else if (!strcmp(name, "ID3")) // handle ID3 tag
481 asf_read_value(s, name, val_len, type, met);
484 ff_get_guid(s->pb, &guid);
487 if ((ret = asf_set_metadata(s, name, type, met)) < 0)
496 static int asf_read_ext_content(AVFormatContext *s, const GUIDParseTable *g)
498 ASFContext *asf = s->priv_data;
499 AVIOContext *pb = s->pb;
500 uint64_t size = avio_rl64(pb);
501 uint16_t nb_desc = avio_rl16(pb);
504 for (i = 0; i < nb_desc; i++) {
505 uint16_t name_len, type, val_len;
506 uint8_t *name = NULL;
508 name_len = avio_rl16(pb);
510 return AVERROR_INVALIDDATA;
511 name = av_malloc(name_len);
513 return AVERROR(ENOMEM);
514 avio_get_str16le(pb, name_len, name,
516 type = avio_rl16(pb);
517 // BOOL values are 16 bits long in the Metadata Object
518 // but 32 bits long in the Extended Content Description Object
519 if (type == ASF_BOOL)
521 val_len = avio_rl16(pb);
523 ret = process_metadata(s, name, name_len, val_len, type, &s->metadata);
529 align_position(pb, asf->offset, size);
533 static AVStream *find_stream(AVFormatContext *s, uint16_t st_num)
536 ASFContext *asf = s->priv_data;
539 for (i = 0; i < asf->nb_streams; i++) {
540 if (asf->asf_st[i]->stream_index == st_num) {
541 st = s->streams[asf->asf_st[i]->index];
549 static int asf_store_aspect_ratio(AVFormatContext *s, uint8_t st_num, uint8_t *name, int type)
551 ASFContext *asf = s->priv_data;
552 AVIOContext *pb = s->pb;
556 ret = asf_read_generic_value(pb, type, &value);
560 if (st_num < ASF_MAX_STREAMS) {
561 if (!strcmp(name, "AspectRatioX"))
562 asf->asf_sd[st_num].aspect_ratio.num = value;
564 asf->asf_sd[st_num].aspect_ratio.den = value;
569 static int asf_read_metadata_obj(AVFormatContext *s, const GUIDParseTable *g)
571 ASFContext *asf = s->priv_data;
572 AVIOContext *pb = s->pb;
573 uint64_t size = avio_rl64(pb);
574 uint16_t nb_recs = avio_rl16(pb); // number of records in the Description Records list
577 for (i = 0; i < nb_recs; i++) {
578 uint16_t name_len, buflen, type, val_len, st_num;
579 uint8_t *name = NULL;
581 avio_skip(pb, 2); // skip reserved field
582 st_num = avio_rl16(pb);
583 name_len = avio_rl16(pb);
584 buflen = 2 * name_len + 1;
587 type = avio_rl16(pb);
588 val_len = avio_rl32(pb);
589 name = av_malloc(buflen);
591 return AVERROR(ENOMEM);
592 avio_get_str16le(pb, name_len, name,
594 if (!strcmp(name, "AspectRatioX") || !strcmp(name, "AspectRatioY")) {
595 ret = asf_store_aspect_ratio(s, st_num, name, type);
601 if (st_num < ASF_MAX_STREAMS) {
602 if ((ret = process_metadata(s, name, name_len, val_len, type,
603 &asf->asf_sd[st_num].asf_met)) < 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)
693 st->codec->width = avio_rl32(pb);
694 st->codec->height = avio_rl32(pb);
695 avio_skip(pb, 1); // skip reserved flags
696 size = avio_rl16(pb); // size of the Format Data
697 tag = ff_get_bmp_header(pb, st);
698 st->codec->codec_tag = tag;
699 st->codec->codec_id = ff_codec_get_id(ff_codec_bmp_tags, tag);
701 if (size > BMP_HEADER_SIZE) {
703 st->codec->extradata_size = size - BMP_HEADER_SIZE;
704 if (!(st->codec->extradata = av_malloc(st->codec->extradata_size +
705 AV_INPUT_BUFFER_PADDING_SIZE))) {
706 st->codec->extradata_size = 0;
707 return AVERROR(ENOMEM);
709 memset(st->codec->extradata + st->codec->extradata_size , 0,
710 AV_INPUT_BUFFER_PADDING_SIZE);
711 if ((ret = avio_read(pb, st->codec->extradata,
712 st->codec->extradata_size)) < 0)
718 static int asf_read_stream_properties(AVFormatContext *s, const GUIDParseTable *g)
720 ASFContext *asf = s->priv_data;
721 AVIOContext *pb = s->pb;
723 uint32_t err_data_len, ts_data_len; // type specific data length
725 ff_asf_guid stream_type;
726 enum AVMediaType type;
728 uint8_t stream_index;
732 // ASF file must not contain more than 128 streams according to the specification
733 if (asf->nb_streams >= ASF_MAX_STREAMS)
734 return AVERROR_INVALIDDATA;
736 size = avio_rl64(pb);
737 ff_get_guid(pb, &stream_type);
738 if (!ff_guidcmp(&stream_type, &ff_asf_audio_stream))
739 type = AVMEDIA_TYPE_AUDIO;
740 else if (!ff_guidcmp(&stream_type, &ff_asf_video_stream))
741 type = AVMEDIA_TYPE_VIDEO;
742 else if (!ff_guidcmp(&stream_type, &ff_asf_jfif_media))
743 type = AVMEDIA_TYPE_VIDEO;
744 else if (!ff_guidcmp(&stream_type, &ff_asf_command_stream))
745 type = AVMEDIA_TYPE_DATA;
746 else if (!ff_guidcmp(&stream_type,
747 &ff_asf_ext_stream_embed_stream_header))
748 type = AVMEDIA_TYPE_UNKNOWN;
750 return AVERROR_INVALIDDATA;
752 ff_get_guid(pb, &stream_type); // error correction type
753 avio_skip(pb, 8); // skip the time offset
754 ts_data_len = avio_rl32(pb);
755 err_data_len = avio_rl32(pb);
756 flags = avio_rl16(pb); // bit 15 - Encrypted Content
758 stream_index = flags & ASF_STREAM_NUM;
759 for (i = 0; i < asf->nb_streams; i++)
760 if (stream_index == asf->asf_st[i]->stream_index) {
761 av_log(s, AV_LOG_WARNING,
762 "Duplicate stream found, this stream will be ignored.\n");
763 align_position(pb, asf->offset, size);
767 st = avformat_new_stream(s, NULL);
769 return AVERROR(ENOMEM);
770 avpriv_set_pts_info(st, 32, 1, 1000); // pts should be dword, in milliseconds
771 st->codec->codec_type = type;
772 asf->asf_st[asf->nb_streams] = av_mallocz(sizeof(*asf_st));
773 if (!asf->asf_st[asf->nb_streams])
774 return AVERROR(ENOMEM);
775 asf_st = asf->asf_st[asf->nb_streams];
777 asf_st->stream_index = stream_index;
778 asf_st->index = st->index;
780 st->id = flags & ASF_STREAM_NUM;
781 av_init_packet(&asf_st->pkt.avpkt);
782 asf_st->pkt.data_size = 0;
783 avio_skip(pb, 4); // skip reserved field
786 case AVMEDIA_TYPE_AUDIO:
787 asf_st->type = AVMEDIA_TYPE_AUDIO;
788 if ((ret = ff_get_wav_header(s, pb, st->codec, ts_data_len)) < 0)
791 case AVMEDIA_TYPE_VIDEO:
792 asf_st->type = AVMEDIA_TYPE_VIDEO;
793 if ((ret = parse_video_info(pb, st)) < 0)
797 avio_skip(pb, ts_data_len);
802 if (type == AVMEDIA_TYPE_AUDIO) {
803 uint8_t span = avio_r8(pb);
806 asf_st->virtual_pkt_len = avio_rl16(pb);
807 asf_st->virtual_chunk_len = avio_rl16(pb);
808 if (!asf_st->virtual_chunk_len || !asf_st->virtual_pkt_len)
809 return AVERROR_INVALIDDATA;
810 avio_skip(pb, err_data_len - 5);
812 avio_skip(pb, err_data_len - 1);
814 avio_skip(pb, err_data_len);
817 align_position(pb, asf->offset, size);
822 static void set_language(AVFormatContext *s, const char *rfc1766, AVDictionary **met)
824 // language abbr should contain at least 2 chars
825 if (rfc1766 && strlen(rfc1766) > 1) {
826 const char primary_tag[3] = { rfc1766[0], rfc1766[1], '\0' }; // ignore country code if any
827 const char *iso6392 = av_convert_lang_to(primary_tag,
828 AV_LANG_ISO639_2_BIBL);
830 if (av_dict_set(met, "language", iso6392, 0) < 0)
831 av_log(s, AV_LOG_WARNING, "av_dict_set failed.\n");
835 static int asf_read_ext_stream_properties(AVFormatContext *s, const GUIDParseTable *g)
837 ASFContext *asf = s->priv_data;
838 AVIOContext *pb = s->pb;
841 uint16_t nb_st_name, nb_pay_exts, st_num, lang_idx;
844 uint64_t start_time, end_time, time_per_frame;
845 uint64_t size = avio_rl64(pb);
847 start_time = avio_rl64(pb);
848 end_time = avio_rl64(pb);
849 bitrate = avio_rl32(pb);
850 avio_skip(pb, 28); // skip some unused values
851 st_num = avio_rl16(pb);
852 st_num &= ASF_STREAM_NUM;
853 lang_idx = avio_rl16(pb); // Stream Language ID Index
854 for (i = 0; i < asf->nb_streams; i++) {
855 if (st_num == asf->asf_st[i]->stream_index) {
856 st = s->streams[asf->asf_st[i]->index];
857 asf->asf_st[i]->lang_idx = lang_idx;
861 time_per_frame = avio_rl64(pb); // average time per frame
863 st->start_time = start_time;
864 st->duration = end_time - start_time;
865 st->codec->bit_rate = bitrate;
866 st->avg_frame_rate.num = 10000000;
867 st->avg_frame_rate.den = time_per_frame;
869 nb_st_name = avio_rl16(pb);
870 nb_pay_exts = avio_rl16(pb);
871 for (i = 0; i < nb_st_name; i++) {
874 avio_rl16(pb); // Language ID Index
879 for (i = 0; i < nb_pay_exts; i++) {
881 avio_skip(pb, 16); // Extension System ID
882 avio_skip(pb, 2); // Extension Data Size
887 if ((ret = ff_get_guid(pb, &guid)) < 0) {
888 align_position(pb, asf->offset, size);
894 if (g && !(strcmp(g->name, "Stream Properties"))) {
895 if ((ret = g->read_object(s, g)) < 0)
899 align_position(pb, asf->offset, size);
903 static int asf_read_language_list(AVFormatContext *s, const GUIDParseTable *g)
905 ASFContext *asf = s->priv_data;
906 AVIOContext *pb = s->pb;
908 uint64_t size = avio_rl64(pb);
909 uint16_t nb_langs = avio_rl16(pb);
911 if (nb_langs < ASF_MAX_STREAMS) {
912 for (i = 0; i < nb_langs; i++) {
917 if ((ret = get_asf_string(pb, len, asf->asf_sd[i].langs,
918 sizeof(asf->asf_sd[i].langs))) < 0) {
924 align_position(pb, asf->offset, size);
928 // returns data object offset when reading this object for the first time
929 static int asf_read_data(AVFormatContext *s, const GUIDParseTable *g)
931 ASFContext *asf = s->priv_data;
932 AVIOContext *pb = s->pb;
933 uint64_t size = asf->data_size = avio_rl64(pb);
936 if (!asf->data_reached) {
937 asf->data_reached = 1;
938 asf->data_offset = asf->offset;
941 for (i = 0; i < asf->nb_streams; i++) {
942 if (!(asf->b_flags & ASF_FLAG_BROADCAST))
943 s->streams[i]->duration = asf->duration;
945 asf->nb_mult_left = 0;
947 asf->state = PARSE_PACKET_HEADER;
948 asf->return_subpayload = 0;
949 asf->packet_size_internal = 0;
950 avio_skip(pb, 16); // skip File ID
951 size = avio_rl64(pb); // Total Data Packets
952 if (size != asf->nb_packets)
953 av_log(s, AV_LOG_WARNING,
954 "Number of Packets from File Properties Object is not equal to Total"
955 "Datapackets value! num of packets %"PRIu64" total num %"PRIu64".\n",
956 size, asf->nb_packets);
957 avio_skip(pb, 2); // skip reserved field
958 asf->first_packet_offset = avio_tell(pb);
959 if (pb->seekable && !(asf->b_flags & ASF_FLAG_BROADCAST))
960 align_position(pb, asf->offset, asf->data_size);
965 static int asf_read_simple_index(AVFormatContext *s, const GUIDParseTable *g)
967 ASFContext *asf = s->priv_data;
968 AVIOContext *pb = s->pb;
970 uint64_t interval; // index entry time interval in 100 ns units, usually it's 1s
971 uint32_t pkt_num, nb_entries;
972 int32_t prev_pkt_num = -1;
974 uint64_t size = avio_rl64(pb);
976 // simple index objects should be ordered by stream number, this loop tries to find
977 // the first not indexed video stream
978 for (i = 0; i < asf->nb_streams; i++) {
979 if ((asf->asf_st[i]->type == AVMEDIA_TYPE_VIDEO) && !asf->asf_st[i]->indexed) {
980 asf->asf_st[i]->indexed = 1;
981 st = s->streams[asf->asf_st[i]->index];
986 avio_skip(pb, size - 24); // if there's no video stream, skip index object
989 avio_skip(pb, 16); // skip File ID
990 interval = avio_rl64(pb);
992 nb_entries = avio_rl32(pb);
993 for (i = 0; i < nb_entries; i++) {
994 pkt_num = avio_rl32(pb);
996 if (prev_pkt_num != pkt_num) {
997 av_add_index_entry(st, asf->first_packet_offset + asf->packet_size *
998 pkt_num, av_rescale(interval, i, 10000),
999 asf->packet_size, 0, AVINDEX_KEYFRAME);
1000 prev_pkt_num = pkt_num;
1003 asf->is_simple_index = 1;
1004 align_position(pb, asf->offset, size);
1009 static const GUIDParseTable gdef[] = {
1010 { "Data", { 0x75, 0xB2, 0x26, 0x36, 0x66, 0x8E, 0x11, 0xCF, 0xA6, 0xD9, 0x00, 0xAA, 0x00, 0x62, 0xCE, 0x6C }, asf_read_data, 1 },
1011 { "Simple Index", { 0x33, 0x00, 0x08, 0x90, 0xE5, 0xB1, 0x11, 0xCF, 0x89, 0xF4, 0x00, 0xA0, 0xC9, 0x03, 0x49, 0xCB }, asf_read_simple_index, 1 },
1012 { "Content Description", { 0x75, 0xB2, 0x26, 0x33, 0x66 ,0x8E, 0x11, 0xCF, 0xA6, 0xD9, 0x00, 0xAA, 0x00, 0x62, 0xCE, 0x6C }, asf_read_content_desc, 1 },
1013 { "Extended Content Description", { 0xD2, 0xD0, 0xA4, 0x40, 0xE3, 0x07, 0x11, 0xD2, 0x97, 0xF0, 0x00, 0xA0, 0xC9, 0x5e, 0xA8, 0x50 }, asf_read_ext_content, 1 },
1014 { "Stream Bitrate Properties", { 0x7B, 0xF8, 0x75, 0xCE, 0x46, 0x8D, 0x11, 0xD1, 0x8D, 0x82, 0x00, 0x60, 0x97, 0xC9, 0xA2, 0xB2 }, asf_read_unknown, 1 },
1015 { "File Properties", { 0x8C, 0xAB, 0xDC, 0xA1, 0xA9, 0x47, 0x11, 0xCF, 0x8E, 0xE4, 0x00, 0xC0, 0x0C, 0x20, 0x53, 0x65 }, asf_read_properties, 1 },
1016 { "Header Extension", { 0x5F, 0xBF, 0x03, 0xB5, 0xA9, 0x2E, 0x11, 0xCF, 0x8E, 0xE3, 0x00, 0xC0, 0x0C, 0x20, 0x53, 0x65 }, asf_read_unknown, 0 },
1017 { "Stream Properties", { 0xB7, 0xDC, 0x07, 0x91, 0xA9, 0xB7, 0x11, 0xCF, 0x8E, 0xE6, 0x00, 0xC0, 0x0C, 0x20, 0x53, 0x65 }, asf_read_stream_properties, 1 },
1018 { "Codec List", { 0x86, 0xD1, 0x52, 0x40, 0x31, 0x1D, 0x11, 0xD0, 0xA3, 0xA4, 0x00, 0xA0, 0xC9, 0x03, 0x48, 0xF6 }, asf_read_unknown, 1 },
1019 { "Marker", { 0xF4, 0x87, 0xCD, 0x01, 0xA9, 0x51, 0x11, 0xCF, 0x8E, 0xE6, 0x00, 0xC0, 0x0C, 0x20, 0x53, 0x65 }, asf_read_marker, 1 },
1020 { "Script Command", { 0x1E, 0xFB, 0x1A, 0x30, 0x0B, 0x62, 0x11, 0xD0, 0xA3, 0x9B, 0x00, 0xA0, 0xC9, 0x03, 0x48, 0xF6 }, asf_read_unknown, 1 },
1021 { "Language List", { 0x7C, 0x43, 0x46, 0xa9, 0xef, 0xe0, 0x4B, 0xFC, 0xB2, 0x29, 0x39, 0x3e, 0xde, 0x41, 0x5c, 0x85 }, asf_read_language_list, 1},
1022 { "Padding", { 0x18, 0x06, 0xD4, 0x74, 0xCA, 0xDF, 0x45, 0x09, 0xA4, 0xBA, 0x9A, 0xAB, 0xCB, 0x96, 0xAA, 0xE8 }, asf_read_unknown, 1 },
1023 { "DRMv1 Header", { 0x22, 0x11, 0xB3, 0xFB, 0xBD, 0x23, 0x11, 0xD2, 0xB4, 0xB7, 0x00, 0xA0, 0xC9, 0x55, 0xFC, 0x6E }, asf_read_unknown, 1 },
1024 { "DRMv2 Header", { 0x29, 0x8A, 0xE6, 0x14, 0x26, 0x22, 0x4C, 0x17, 0xB9, 0x35, 0xDA, 0xE0, 0x7E, 0xE9, 0x28, 0x9c }, asf_read_unknown, 1 },
1025 { "Index", { 0xD6, 0xE2, 0x29, 0xD3, 0x35, 0xDA, 0x11, 0xD1, 0x90, 0x34, 0x00, 0xA0, 0xC9, 0x03, 0x49, 0xBE }, asf_read_unknown, 1 },
1026 { "Media Object Index", { 0xFE, 0xB1, 0x03, 0xF8, 0x12, 0xAD, 0x4C, 0x64, 0x84, 0x0F, 0x2A, 0x1D, 0x2F, 0x7A, 0xD4, 0x8C }, asf_read_unknown, 1 },
1027 { "Timecode Index", { 0x3C, 0xB7, 0x3F, 0xD0, 0x0C, 0x4A, 0x48, 0x03, 0x95, 0x3D, 0xED, 0xF7, 0xB6, 0x22, 0x8F, 0x0C }, asf_read_unknown, 0 },
1028 { "Bitrate_Mutual_Exclusion", { 0xD6, 0xE2, 0x29, 0xDC, 0x35, 0xDA, 0x11, 0xD1, 0x90, 0x34, 0x00, 0xA0, 0xC9, 0x03, 0x49, 0xBE }, asf_read_unknown, 1 },
1029 { "Error Correction", { 0x75, 0xB2, 0x26, 0x35, 0x66, 0x8E, 0x11, 0xCF, 0xA6, 0xD9, 0x00, 0xAA, 0x00, 0x62, 0xCE, 0x6C }, asf_read_unknown, 1 },
1030 { "Content Branding", { 0x22, 0x11, 0xB3, 0xFA, 0xBD, 0x23, 0x11, 0xD2, 0xB4, 0xB7, 0x00, 0xA0, 0xC9, 0x55, 0xFC, 0x6E }, asf_read_unknown, 1 },
1031 { "Content Encryption", { 0x22, 0x11, 0xB3, 0xFB, 0xBD, 0x23, 0x11, 0xD2, 0xB4, 0xB7, 0x00, 0xA0, 0xC9, 0x55, 0xFC, 0x6E }, asf_read_unknown, 1 },
1032 { "Extended Content Encryption", { 0x29, 0x8A, 0xE6, 0x14, 0x26, 0x22, 0x4C, 0x17, 0xB9, 0x35, 0xDA, 0xE0, 0x7E, 0xE9, 0x28, 0x9C }, asf_read_unknown, 1 },
1033 { "Digital Signature", { 0x22, 0x11, 0xB3, 0xFC, 0xBD, 0x23, 0x11, 0xD2, 0xB4, 0xB7, 0x00, 0xA0, 0xC9, 0x55, 0xFC, 0x6E }, asf_read_unknown, 1 },
1034 { "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 },
1035 { "Advanced Mutual Exclusion", { 0xA0, 0x86, 0x49, 0xCF, 0x47, 0x75, 0x46, 0x70, 0x8A, 0x16, 0x6E, 0x35, 0x35, 0x75, 0x66, 0xCD }, asf_read_unknown, 1 },
1036 { "Group Mutual Exclusion", { 0xD1, 0x46, 0x5A, 0x40, 0x5A, 0x79, 0x43, 0x38, 0xB7, 0x1B, 0xE3, 0x6B, 0x8F, 0xD6, 0xC2, 0x49 }, asf_read_unknown, 1},
1037 { "Stream Prioritization", { 0xD4, 0xFE, 0xD1, 0x5B, 0x88, 0xD3, 0x45, 0x4F, 0x81, 0xF0, 0xED, 0x5C, 0x45, 0x99, 0x9E, 0x24 }, asf_read_unknown, 1 },
1038 { "Bandwidth Sharing Object", { 0xA6, 0x96, 0x09, 0xE6, 0x51, 0x7B, 0x11, 0xD2, 0xB6, 0xAF, 0x00, 0xC0, 0x4F, 0xD9, 0x08, 0xE9 }, asf_read_unknown, 1 },
1039 { "Metadata", { 0xC5, 0xF8, 0xCB, 0xEA, 0x5B, 0xAF, 0x48, 0x77, 0x84, 0x67, 0xAA, 0x8C, 0x44, 0xFA, 0x4C, 0xCA }, asf_read_metadata_obj, 1 },
1040 { "Metadata Library", { 0x44, 0x23, 0x1C, 0x94, 0x94, 0x98, 0x49, 0xD1, 0xA1, 0x41, 0x1D, 0x13, 0x4E, 0x45, 0x70, 0x54 }, asf_read_metadata_obj, 1 },
1041 { "Audio Spread", { 0xBF, 0xC3, 0xCD, 0x50, 0x61, 0x8F, 0x11, 0xCF, 0x8B, 0xB2, 0x00, 0xAA, 0x00, 0xB4, 0xE2, 0x20 }, asf_read_unknown, 1 },
1042 { "Index Parameters", { 0xD6, 0xE2, 0x29, 0xDF, 0x35, 0xDA, 0x11, 0xD1, 0x90, 0x34, 0x00, 0xA0, 0xC9, 0x03, 0x49, 0xBE }, asf_read_unknown, 1 },
1043 { "Content Encryption System Windows Media DRM Network Devices",
1044 { 0x7A, 0x07, 0x9B, 0xB6, 0xDA, 0XA4, 0x4e, 0x12, 0xA5, 0xCA, 0x91, 0xD3, 0x8D, 0xC1, 0x1A, 0x8D }, asf_read_unknown, 1 },
1045 { "Mutex Language", { 0xD6, 0xE2, 0x2A, 0x00, 0x25, 0xDA, 0x11, 0xD1, 0x90, 0x34, 0x00, 0xA0, 0xC9, 0x03, 0x49, 0xBE }, asf_read_unknown, 1 },
1046 { "Mutex Bitrate", { 0xD6, 0xE2, 0x2A, 0x01, 0x25, 0xDA, 0x11, 0xD1, 0x90, 0x34, 0x00, 0xA0, 0xC9, 0x03, 0x49, 0xBE }, asf_read_unknown, 1 },
1047 { "Mutex Unknown", { 0xD6, 0xE2, 0x2A, 0x02, 0x25, 0xDA, 0x11, 0xD1, 0x90, 0x34, 0x00, 0xA0, 0xC9, 0x03, 0x49, 0xBE }, asf_read_unknown, 1 },
1048 { "Bandwith Sharing Exclusive", { 0xAF, 0x60, 0x60, 0xAA, 0x51, 0x97, 0x11, 0xD2, 0xB6, 0xAF, 0x00, 0xC0, 0x4F, 0xD9, 0x08, 0xE9 }, asf_read_unknown, 1 },
1049 { "Bandwith Sharing Partial", { 0xAF, 0x60, 0x60, 0xAB, 0x51, 0x97, 0x11, 0xD2, 0xB6, 0xAF, 0x00, 0xC0, 0x4F, 0xD9, 0x08, 0xE9 }, asf_read_unknown, 1 },
1050 { "Payload Extension System Timecode", { 0x39, 0x95, 0x95, 0xEC, 0x86, 0x67, 0x4E, 0x2D, 0x8F, 0xDB, 0x98, 0x81, 0x4C, 0xE7, 0x6C, 0x1E }, asf_read_unknown, 1 },
1051 { "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 },
1052 { "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 },
1053 { "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 },
1054 { "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 },
1055 { "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 },
1056 { "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 },
1059 #define READ_LEN(flag, name, len) \
1061 if ((flag) == name ## IS_BYTE) \
1062 len = avio_r8(pb); \
1063 else if ((flag) == name ## IS_WORD) \
1064 len = avio_rl16(pb); \
1065 else if ((flag) == name ## IS_DWORD) \
1066 len = avio_rl32(pb); \
1071 static int asf_read_subpayload(AVFormatContext *s, AVPacket *pkt, int is_header)
1073 ASFContext *asf = s->priv_data;
1074 AVIOContext *pb = s->pb;
1079 asf->dts_delta = avio_r8(pb);
1080 if (asf->nb_mult_left) {
1081 asf->mult_sub_len = avio_rl16(pb); // total
1083 asf->sub_header_offset = avio_tell(pb);
1087 sub_len = avio_r8(pb);
1088 if ((ret = av_get_packet(pb, pkt, sub_len)) < 0) // each subpayload is entire frame
1090 for (i = 0; i < asf->nb_streams; i++) {
1091 if (asf->stream_index == asf->asf_st[i]->stream_index) {
1092 pkt->stream_index = asf->asf_st[i]->index;
1096 asf->return_subpayload = 1;
1098 asf->return_subpayload = 0;
1102 pkt->dts = asf->sub_dts + (asf->nb_sub - 1) * asf->dts_delta - asf->preroll;
1103 if (asf->nb_mult_left && (avio_tell(pb) >=
1104 (asf->sub_header_offset + asf->mult_sub_len))) {
1106 asf->nb_mult_left--;
1108 if (avio_tell(pb) >= asf->packet_offset + asf->packet_size - asf->pad_len) {
1110 if (!asf->nb_mult_left) {
1111 avio_skip(pb, asf->pad_len);
1112 if (avio_tell(pb) != asf->packet_offset + asf->packet_size) {
1113 if (!asf->packet_size)
1114 return AVERROR_INVALIDDATA;
1115 av_log(s, AV_LOG_WARNING,
1116 "Position %"PRId64" wrong, should be %"PRId64"\n",
1117 avio_tell(pb), asf->packet_offset + asf->packet_size);
1118 avio_seek(pb, asf->packet_offset + asf->packet_size, SEEK_SET);
1126 static void reset_packet(ASFPacket *asf_pkt)
1128 asf_pkt->size_left = 0;
1129 asf_pkt->data_size = 0;
1130 asf_pkt->duration = 0;
1133 asf_pkt->duration = 0;
1134 av_packet_unref(&asf_pkt->avpkt);
1135 av_init_packet(&asf_pkt->avpkt);
1138 static int asf_read_replicated_data(AVFormatContext *s, ASFPacket *asf_pkt)
1140 ASFContext *asf = s->priv_data;
1141 AVIOContext *pb = s->pb;
1144 if (!asf_pkt->data_size) {
1145 data_size = avio_rl32(pb); // read media object size
1147 return AVERROR_INVALIDDATA;
1148 if ((ret = av_new_packet(&asf_pkt->avpkt, data_size)) < 0)
1150 asf_pkt->data_size = asf_pkt->size_left = data_size;
1152 avio_skip(pb, 4); // reading of media object size is already done
1153 asf_pkt->dts = avio_rl32(pb); // read presentation time
1154 if (asf->rep_data_len && (asf->rep_data_len >= 8))
1155 avio_skip(pb, asf->rep_data_len - 8); // skip replicated data
1160 static int asf_read_multiple_payload(AVFormatContext *s, AVPacket *pkt,
1163 ASFContext *asf = s->priv_data;
1164 AVIOContext *pb = s->pb;
1170 // if replicated lenght is 1, subpayloads are present
1171 if (asf->rep_data_len == 1) {
1173 asf->state = READ_MULTI_SUB;
1174 pkt->flags = asf_pkt->flags;
1175 if ((ret = asf_read_subpayload(s, pkt, 1)) < 0)
1178 if (asf->rep_data_len)
1179 if ((ret = asf_read_replicated_data(s, asf_pkt)) < 0)
1181 pay_len = avio_rl16(pb); // payload length should be WORD
1182 if (pay_len > asf->packet_size) {
1183 av_log(s, AV_LOG_ERROR,
1184 "Error: invalid data packet size, pay_len %"PRIu16", "
1185 "asf->packet_size %"PRIu32", offset %"PRId64".\n",
1186 pay_len, asf->packet_size, avio_tell(pb));
1187 return AVERROR_INVALIDDATA;
1189 p = asf_pkt->avpkt.data + asf_pkt->data_size - asf_pkt->size_left;
1190 if (pay_len > asf_pkt->size_left) {
1191 av_log(s, AV_LOG_ERROR,
1192 "Error: invalid buffer size, pay_len %d, data size left %d.\n",
1193 pay_len, asf_pkt->size_left);
1194 skip = pay_len - asf_pkt->size_left;
1195 pay_len = asf_pkt->size_left;
1197 if (asf_pkt->size_left <= 0)
1198 return AVERROR_INVALIDDATA;
1199 if ((ret = avio_read(pb, p, pay_len)) < 0)
1201 if (s->key && s->keylen == 20)
1202 ff_asfcrypt_dec(s->key, p, ret);
1203 avio_skip(pb, skip);
1204 asf_pkt->size_left -= pay_len;
1205 asf->nb_mult_left--;
1211 static int asf_read_single_payload(AVFormatContext *s, ASFPacket *asf_pkt)
1213 ASFContext *asf = s->priv_data;
1214 AVIOContext *pb = s->pb;
1220 if (!asf_pkt->data_size) {
1221 data_size = avio_rl32(pb); // read media object size
1224 if ((ret = av_new_packet(&asf_pkt->avpkt, data_size)) < 0)
1226 asf_pkt->data_size = asf_pkt->size_left = data_size;
1228 avio_skip(pb, 4); // skip media object size
1229 asf_pkt->dts = avio_rl32(pb); // read presentation time
1230 if (asf->rep_data_len >= 8)
1231 avio_skip(pb, asf->rep_data_len - 8); // skip replicated data
1232 offset = avio_tell(pb);
1234 // size of the payload - size of the packet without header and padding
1235 if (asf->packet_size_internal)
1236 size = asf->packet_size_internal - offset + asf->packet_offset - asf->pad_len;
1238 size = asf->packet_size - offset + asf->packet_offset - asf->pad_len;
1239 if (size > asf->packet_size) {
1240 av_log(s, AV_LOG_ERROR,
1241 "Error: invalid data packet size, offset %"PRId64".\n",
1243 return AVERROR_INVALIDDATA;
1245 p = asf_pkt->avpkt.data + asf_pkt->data_size - asf_pkt->size_left;
1246 if (size > asf_pkt->size_left || asf_pkt->size_left <= 0)
1247 return AVERROR_INVALIDDATA;
1248 if (asf_pkt->size_left > size)
1249 asf_pkt->size_left -= size;
1251 asf_pkt->size_left = 0;
1252 if ((ret = avio_read(pb, p, size)) < 0)
1254 if (s->key && s->keylen == 20)
1255 ff_asfcrypt_dec(s->key, p, ret);
1256 if (asf->packet_size_internal)
1257 avio_skip(pb, asf->packet_size - asf->packet_size_internal);
1258 avio_skip(pb, asf->pad_len); // skip padding
1263 static int asf_read_payload(AVFormatContext *s, AVPacket *pkt)
1265 ASFContext *asf = s->priv_data;
1266 AVIOContext *pb = s->pb;
1268 ASFPacket *asf_pkt = NULL;
1270 if (!asf->sub_left) {
1271 uint32_t off_len, media_len;
1274 stream_num = avio_r8(pb);
1275 asf->stream_index = stream_num & ASF_STREAM_NUM;
1276 for (i = 0; i < asf->nb_streams; i++) {
1277 if (asf->stream_index == asf->asf_st[i]->stream_index) {
1278 asf_pkt = &asf->asf_st[i]->pkt;
1279 asf_pkt->stream_index = asf->asf_st[i]->index;
1284 if (asf->packet_offset + asf->packet_size <= asf->data_offset + asf->data_size) {
1285 avio_seek(pb, asf->packet_offset + asf->packet_size, SEEK_SET);
1286 av_log(s, AV_LOG_WARNING, "Skipping the stream with the invalid stream index %d.\n",
1288 return AVERROR(EAGAIN);
1290 return AVERROR_INVALIDDATA;
1293 if (stream_num >> 7)
1294 asf_pkt->flags |= AV_PKT_FLAG_KEY;
1295 READ_LEN(asf->prop_flags & ASF_PL_MASK_MEDIA_OBJECT_NUMBER_LENGTH_FIELD_SIZE,
1296 ASF_PL_FLAG_MEDIA_OBJECT_NUMBER_LENGTH_FIELD_, media_len);
1297 READ_LEN(asf->prop_flags & ASF_PL_MASK_OFFSET_INTO_MEDIA_OBJECT_LENGTH_FIELD_SIZE,
1298 ASF_PL_FLAG_OFFSET_INTO_MEDIA_OBJECT_LENGTH_FIELD_, off_len);
1299 READ_LEN(asf->prop_flags & ASF_PL_MASK_REPLICATED_DATA_LENGTH_FIELD_SIZE,
1300 ASF_PL_FLAG_REPLICATED_DATA_LENGTH_FIELD_, asf->rep_data_len);
1301 if (asf_pkt->size_left && (asf_pkt->frame_num != media_len)) {
1302 av_log(s, AV_LOG_WARNING, "Unfinished frame will be ignored\n");
1303 reset_packet(asf_pkt);
1305 asf_pkt->frame_num = media_len;
1306 asf->sub_dts = off_len;
1307 if (asf->nb_mult_left) {
1308 if ((ret = asf_read_multiple_payload(s, pkt, asf_pkt)) < 0)
1310 } else if (asf->rep_data_len == 1) {
1312 asf->state = READ_SINGLE;
1313 pkt->flags = asf_pkt->flags;
1314 if ((ret = asf_read_subpayload(s, pkt, 1)) < 0)
1317 if ((ret = asf_read_single_payload(s, asf_pkt)) < 0)
1321 for (i = 0; i <= asf->nb_streams; i++) {
1322 if (asf->stream_index == asf->asf_st[i]->stream_index) {
1323 asf_pkt = &asf->asf_st[i]->pkt;
1328 return AVERROR_INVALIDDATA;
1329 pkt->flags = asf_pkt->flags;
1330 pkt->dts = asf_pkt->dts;
1331 pkt->stream_index = asf->asf_st[i]->index;
1332 if ((ret = asf_read_subpayload(s, pkt, 0)) < 0) // read subpayload without its header
1339 static int asf_read_packet_header(AVFormatContext *s)
1341 ASFContext *asf = s->priv_data;
1342 AVIOContext *pb = s->pb;
1344 uint32_t av_unused seq;
1345 unsigned char error_flags, len_flags, pay_flags;
1347 asf->packet_offset = avio_tell(pb);
1348 error_flags = avio_r8(pb); // read Error Correction Flags
1349 if (error_flags & ASF_PACKET_FLAG_ERROR_CORRECTION_PRESENT) {
1350 if (!(error_flags & ASF_ERROR_CORRECTION_LENGTH_TYPE)) {
1351 size = error_flags & ASF_PACKET_ERROR_CORRECTION_DATA_SIZE;
1352 avio_skip(pb, size);
1354 len_flags = avio_r8(pb);
1356 len_flags = error_flags;
1357 asf->prop_flags = avio_r8(pb);
1358 READ_LEN(len_flags & ASF_PPI_MASK_PACKET_LENGTH_FIELD_SIZE,
1359 ASF_PPI_FLAG_PACKET_LENGTH_FIELD_, asf->packet_size_internal);
1360 READ_LEN(len_flags & ASF_PPI_MASK_SEQUENCE_FIELD_SIZE,
1361 ASF_PPI_FLAG_SEQUENCE_FIELD_, seq);
1362 READ_LEN(len_flags & ASF_PPI_MASK_PADDING_LENGTH_FIELD_SIZE,
1363 ASF_PPI_FLAG_PADDING_LENGTH_FIELD_, asf->pad_len );
1364 asf->send_time = avio_rl32(pb); // send time
1365 avio_skip(pb, 2); // skip duration
1366 if (len_flags & ASF_PPI_FLAG_MULTIPLE_PAYLOADS_PRESENT) { // Multiple Payloads present
1367 pay_flags = avio_r8(pb);
1368 asf->nb_mult_left = (pay_flags & ASF_NUM_OF_PAYLOADS);
1374 static int asf_deinterleave(AVFormatContext *s, ASFPacket *asf_pkt, int st_num)
1376 ASFContext *asf = s->priv_data;
1377 ASFStream *asf_st = asf->asf_st[st_num];
1378 unsigned char *p = asf_pkt->avpkt.data;
1379 uint16_t pkt_len = asf->asf_st[st_num]->virtual_pkt_len;
1380 uint16_t chunk_len = asf->asf_st[st_num]->virtual_chunk_len;
1381 int nchunks = pkt_len / chunk_len;
1383 int pos = 0, j, l, ret;
1386 if ((ret = av_new_packet(&pkt, asf_pkt->data_size)) < 0)
1389 while (asf_pkt->data_size >= asf_st->span * pkt_len + pos) {
1390 if (pos >= asf_pkt->data_size) {
1393 for (l = 0; l < pkt_len; l++) {
1394 if (pos >= asf_pkt->data_size) {
1397 for (j = 0; j < asf_st->span; j++) {
1398 if ((pos + chunk_len) >= asf_pkt->data_size)
1400 memcpy(pkt.data + pos,
1401 p + (j * nchunks + l) * chunk_len,
1406 p += asf_st->span * pkt_len;
1407 if (p > asf_pkt->avpkt.data + asf_pkt->data_size)
1410 av_packet_unref(&asf_pkt->avpkt);
1411 asf_pkt->avpkt = pkt;
1416 static int asf_read_packet(AVFormatContext *s, AVPacket *pkt)
1418 ASFContext *asf = s->priv_data;
1419 AVIOContext *pb = s->pb;
1422 if ((avio_tell(pb) >= asf->data_offset + asf->data_size) &&
1423 !(asf->b_flags & ASF_FLAG_BROADCAST))
1425 while (!pb->eof_reached) {
1426 if (asf->state == PARSE_PACKET_HEADER) {
1427 asf_read_packet_header(s);
1428 if (pb->eof_reached)
1430 if (!asf->nb_mult_left)
1431 asf->state = READ_SINGLE;
1433 asf->state = READ_MULTI;
1435 ret = asf_read_payload(s, pkt);
1436 if (ret == AVERROR(EAGAIN)) {
1437 asf->state = PARSE_PACKET_HEADER;
1443 switch (asf->state) {
1446 asf->state = PARSE_PACKET_HEADER;
1448 case READ_MULTI_SUB:
1449 if (!asf->sub_left && !asf->nb_mult_left) {
1450 asf->state = PARSE_PACKET_HEADER;
1451 if (!asf->return_subpayload &&
1452 (avio_tell(pb) <= asf->packet_offset +
1453 asf->packet_size - asf->pad_len))
1454 avio_skip(pb, asf->pad_len); // skip padding
1455 if (asf->packet_offset + asf->packet_size > avio_tell(pb))
1456 avio_seek(pb, asf->packet_offset + asf->packet_size, SEEK_SET);
1457 } else if (!asf->sub_left)
1458 asf->state = READ_MULTI;
1461 if (!asf->nb_mult_left) {
1462 asf->state = PARSE_PACKET_HEADER;
1463 if (!asf->return_subpayload &&
1464 (avio_tell(pb) <= asf->packet_offset +
1465 asf->packet_size - asf->pad_len))
1466 avio_skip(pb, asf->pad_len); // skip padding
1467 if (asf->packet_offset + asf->packet_size > avio_tell(pb))
1468 avio_seek(pb, asf->packet_offset + asf->packet_size, SEEK_SET);
1472 if (asf->return_subpayload) {
1473 asf->return_subpayload = 0;
1476 for (i = 0; i < s->nb_streams; i++) {
1477 ASFPacket *asf_pkt = &asf->asf_st[i]->pkt;
1478 if (asf_pkt && !asf_pkt->size_left && asf_pkt->data_size) {
1479 if (asf->asf_st[i]->span > 1 &&
1480 asf->asf_st[i]->type == AVMEDIA_TYPE_AUDIO)
1481 if ((ret = asf_deinterleave(s, asf_pkt, i)) < 0)
1483 av_packet_move_ref(pkt, &asf_pkt->avpkt);
1484 pkt->stream_index = asf->asf_st[i]->index;
1485 pkt->flags = asf_pkt->flags;
1486 pkt->dts = asf_pkt->dts - asf->preroll;
1487 asf_pkt->data_size = 0;
1488 asf_pkt->frame_num = 0;
1494 if (pb->eof_reached)
1500 static int asf_read_close(AVFormatContext *s)
1502 ASFContext *asf = s->priv_data;
1505 for (i = 0; i < ASF_MAX_STREAMS; i++) {
1506 av_dict_free(&asf->asf_sd[i].asf_met);
1507 if (i < asf->nb_streams) {
1508 av_packet_unref(&asf->asf_st[i]->pkt.avpkt);
1509 av_freep(&asf->asf_st[i]);
1513 asf->nb_streams = 0;
1517 static void reset_packet_state(AVFormatContext *s)
1519 ASFContext *asf = s->priv_data;
1522 asf->state = PARSE_PACKET_HEADER;
1524 asf->return_subpayload = 0;
1526 asf->sub_header_offset = 0;
1527 asf->packet_offset = asf->first_packet_offset;
1529 asf->rep_data_len = 0;
1531 asf->mult_sub_len = 0;
1532 asf->nb_mult_left = 0;
1534 asf->prop_flags = 0;
1536 for (i = 0; i < asf->nb_streams; i++) {
1537 ASFPacket *pkt = &asf->asf_st[i]->pkt;
1544 av_packet_unref(&pkt->avpkt);
1545 av_init_packet(&pkt->avpkt);
1550 * Find a timestamp for the requested position within the payload
1551 * where the pos (position) is the offset inside the Data Object.
1552 * When position is not on the packet boundary, asf_read_timestamp tries
1553 * to find the closest packet offset after this position. If this packet
1554 * is a key frame, this packet timestamp is read and an index entry is created
1555 * for the packet. If this packet belongs to the requested stream,
1556 * asf_read_timestamp upgrades pos to the packet beginning offset and
1557 * returns this packet's dts. So returned dts is the dts of the first key frame with
1558 * matching stream number after given position.
1560 static int64_t asf_read_timestamp(AVFormatContext *s, int stream_index,
1561 int64_t *pos, int64_t pos_limit)
1563 ASFContext *asf = s->priv_data;
1564 int64_t pkt_pos = *pos, pkt_offset, dts = AV_NOPTS_VALUE, data_end;
1568 data_end = asf->data_offset + asf->data_size;
1570 n = (pkt_pos - asf->first_packet_offset + asf->packet_size - 1) /
1572 n = av_clip(n, 0, ((data_end - asf->first_packet_offset) / asf->packet_size - 1));
1573 pkt_pos = asf->first_packet_offset + n * asf->packet_size;
1575 avio_seek(s->pb, pkt_pos, SEEK_SET);
1576 pkt_offset = pkt_pos;
1578 reset_packet_state(s);
1579 while (avio_tell(s->pb) < data_end) {
1581 int i, ret, st_found;
1583 av_init_packet(&pkt);
1584 pkt_offset = avio_tell(s->pb);
1585 if ((ret = asf_read_packet(s, &pkt)) < 0) {
1586 dts = AV_NOPTS_VALUE;
1589 // ASFPacket may contain fragments of packets belonging to different streams,
1590 // pkt_offset is the offset of the first fragment within it.
1591 if ((pkt_offset >= (pkt_pos + asf->packet_size)))
1592 pkt_pos += asf->packet_size;
1593 for (i = 0; i < asf->nb_streams; i++) {
1594 ASFStream *st = asf->asf_st[i];
1597 if (pkt.flags & AV_PKT_FLAG_KEY) {
1600 av_add_index_entry(s->streams[pkt.stream_index], pkt_pos,
1601 dts, pkt.size, 0, AVINDEX_KEYFRAME);
1602 if (stream_index == st->index) {
1611 av_packet_unref(&pkt);
1615 av_packet_unref(&pkt);
1619 static int asf_read_seek(AVFormatContext *s, int stream_index,
1620 int64_t timestamp, int flags)
1622 ASFContext *asf = s->priv_data;
1625 if (s->streams[stream_index]->nb_index_entries && asf->is_simple_index) {
1626 idx = av_index_search_timestamp(s->streams[stream_index], timestamp, flags);
1627 if (idx < 0 || idx >= s->streams[stream_index]->nb_index_entries)
1628 return AVERROR_INVALIDDATA;
1629 avio_seek(s->pb, s->streams[stream_index]->index_entries[idx].pos, SEEK_SET);
1631 if ((ret = ff_seek_frame_binary(s, stream_index, timestamp, flags)) < 0)
1635 reset_packet_state(s);
1640 static const GUIDParseTable *find_guid(ff_asf_guid guid)
1643 const GUIDParseTable *g;
1647 for (j = 0; j < FF_ARRAY_ELEMS(gdef); j++) {
1648 if (!(ret = memcmp(guid, g->guid, sizeof(g->guid))))
1656 static int detect_unknown_subobject(AVFormatContext *s, int64_t offset, int64_t size)
1658 ASFContext *asf = s->priv_data;
1659 AVIOContext *pb = s->pb;
1660 const GUIDParseTable *g = NULL;
1664 while (avio_tell(pb) <= offset + size) {
1665 if (avio_tell(pb) == asf->offset)
1667 asf->offset = avio_tell(pb);
1668 if ((ret = ff_get_guid(pb, &guid)) < 0)
1670 g = find_guid(guid);
1672 if ((ret = g->read_object(s, g)) < 0)
1677 g2.name = "Unknown";
1678 g2.is_subobject = 1;
1679 asf_read_unknown(s, &g2);
1686 static int asf_read_header(AVFormatContext *s)
1688 ASFContext *asf = s->priv_data;
1689 AVIOContext *pb = s->pb;
1690 const GUIDParseTable *g = NULL;
1696 asf->is_simple_index = 0;
1697 ff_get_guid(pb, &guid);
1698 if (ff_guidcmp(&guid, &ff_asf_header))
1699 return AVERROR_INVALIDDATA;
1700 avio_skip(pb, 8); // skip header object size
1701 avio_skip(pb, 6); // skip number of header objects and 2 reserved bytes
1702 asf->data_reached = 0;
1704 /* 1 is here instead of pb->eof_reached because (when not streaming), Data are skipped
1705 * for the first time,
1706 * Index object is processed and got eof and then seeking back to the Data is performed.
1709 // for the cases when object size is invalid
1710 if (avio_tell(pb) == asf->offset)
1712 asf->offset = avio_tell(pb);
1713 if ((ret = ff_get_guid(pb, &guid)) < 0) {
1714 if (ret == AVERROR_EOF && asf->data_reached)
1719 g = find_guid(guid);
1721 asf->unknown_offset = asf->offset;
1723 if ((ret = g->read_object(s, g)) < 0)
1726 size = avio_rl64(pb);
1727 align_position(pb, asf->offset, size);
1729 if (asf->data_reached && (!pb->seekable || (asf->b_flags & ASF_FLAG_BROADCAST)))
1733 if (!asf->data_reached) {
1734 av_log(s, AV_LOG_ERROR, "Data Object was not found.\n");
1735 ret = AVERROR_INVALIDDATA;
1739 avio_seek(pb, asf->first_packet_offset, SEEK_SET);
1741 for (i = 0; i < asf->nb_streams; i++) {
1742 const char *rfc1766 = asf->asf_sd[asf->asf_st[i]->lang_idx].langs;
1743 AVStream *st = s->streams[asf->asf_st[i]->index];
1744 set_language(s, rfc1766, &st->metadata);
1747 for (i = 0; i < ASF_MAX_STREAMS; i++) {
1748 AVStream *st = NULL;
1750 st = find_stream(s, i);
1752 av_dict_copy(&st->metadata, asf->asf_sd[i].asf_met, AV_DICT_IGNORE_SUFFIX);
1753 if (asf->asf_sd[i].aspect_ratio.num > 0 && asf->asf_sd[i].aspect_ratio.den > 0) {
1754 st->sample_aspect_ratio.num = asf->asf_sd[i].aspect_ratio.num;
1755 st->sample_aspect_ratio.den = asf->asf_sd[i].aspect_ratio.den;
1767 AVInputFormat ff_asf_demuxer = {
1769 .long_name = NULL_IF_CONFIG_SMALL("ASF (Advanced / Active Streaming Format)"),
1770 .priv_data_size = sizeof(ASFContext),
1771 .read_probe = asf_probe,
1772 .read_header = asf_read_header,
1773 .read_packet = asf_read_packet,
1774 .read_close = asf_read_close,
1775 .read_timestamp = asf_read_timestamp,
1776 .read_seek = asf_read_seek,
1777 .flags = AVFMT_NOBINSEARCH | AVFMT_NOGENSEARCH,