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/common.h"
24 #include "libavutil/dict.h"
25 #include "libavutil/internal.h"
26 #include "libavutil/mathematics.h"
27 #include "libavutil/time_internal.h"
30 #include "avio_internal.h"
31 #include "avlanguage.h"
42 #define ASF_UNICODE 0x0
43 #define ASF_FLAG_BROADCAST 0x1
44 #define ASF_BYTE_ARRAY 0x1
45 #define ASF_TYPE_AUDIO 0x2
46 #define ASF_TYPE_VIDEO 0x1
47 #define ASF_STREAM_NUM 0x7F
48 #define ASF_MAX_STREAMS 128
49 #define BMP_HEADER_SIZE 40
50 #define ASF_NUM_OF_PAYLOADS 0x3F
51 #define ASF_ERROR_CORRECTION_LENGTH_TYPE 0x60
52 #define ASF_PACKET_ERROR_CORRECTION_DATA_SIZE 0x2
54 typedef struct GUIDParseTable {
57 int (*read_object)(AVFormatContext *, const struct GUIDParseTable *);
61 typedef struct ASFPacket {
64 uint32_t frame_num; // ASF payloads with the same number are parts of the same frame
72 typedef struct ASFStream {
73 uint8_t stream_index; // from packet header
74 int index; // stream index in AVFormatContext, set in asf_read_stream_properties
76 int indexed; // added index entries from the Simple Index Object or not
77 int8_t span; // for deinterleaving
78 uint16_t virtual_pkt_len;
79 uint16_t virtual_chunk_len;
84 typedef struct ASFStreamData{
86 AVDictionary *asf_met; // for storing per-stream metadata
87 AVRational aspect_ratio;
90 typedef struct ASFContext {
92 int is_simple_index; // is simple index present or not 1/0
96 uint64_t nb_packets; // ASF packets
101 uint32_t b_flags; // flags with broadcast flag
102 uint32_t prop_flags; // file properties object flags
104 uint64_t data_size; // data object size
105 uint64_t unknown_size; // size of the unknown object
107 int64_t offset; // offset of the current object
110 int64_t first_packet_offset; // packet offset
111 int64_t unknown_offset; // for top level header objects or subobjects without specified behavior
113 // ASF file must not contain more than 128 streams according to the specification
114 ASFStream *asf_st[ASF_MAX_STREAMS];
115 ASFStreamData asf_sd[ASF_MAX_STREAMS];
118 int stream_index; // from packet header, for the subpayload case
121 uint64_t sub_header_offset; // offset of subpayload header
123 uint8_t dts_delta; // for subpayloads
124 uint32_t packet_size_internal; // packet size stored inside ASFPacket, can be 0
125 int64_t packet_offset; // offset of the current packet inside Data Object
126 uint32_t pad_len; // padding after payload
127 uint32_t rep_data_len;
130 uint64_t sub_left; // subpayloads left or not
131 unsigned int nb_sub; // number of subpayloads read so far from the current ASF packet
132 uint16_t mult_sub_len; // total length of subpayloads array inside multiple payload
133 uint64_t nb_mult_left; // multiple payloads left
134 int return_subpayload;
143 static int detect_unknown_subobject(AVFormatContext *s, int64_t offset, int64_t size);
144 static const GUIDParseTable *find_guid(ff_asf_guid guid);
146 static int asf_probe(const AVProbeData *pd)
148 /* check file header */
149 if (!ff_guidcmp(pd->buf, &ff_asf_header))
150 return AVPROBE_SCORE_MAX/2;
155 static void swap_guid(ff_asf_guid guid)
157 FFSWAP(unsigned char, guid[0], guid[3]);
158 FFSWAP(unsigned char, guid[1], guid[2]);
159 FFSWAP(unsigned char, guid[4], guid[5]);
160 FFSWAP(unsigned char, guid[6], guid[7]);
163 static void align_position(AVIOContext *pb, int64_t offset, uint64_t size)
165 if (size < INT64_MAX - offset && avio_tell(pb) != offset + size)
166 avio_seek(pb, offset + size, SEEK_SET);
169 static int asf_read_unknown(AVFormatContext *s, const GUIDParseTable *g)
171 ASFContext *asf = s->priv_data;
172 AVIOContext *pb = s->pb;
173 uint64_t size = avio_rl64(pb);
176 if (size > INT64_MAX)
177 return AVERROR_INVALIDDATA;
180 asf->unknown_size = size;
182 if (!g->is_subobject) {
183 if (!(ret = strcmp(g->name, "Header Extension")))
184 avio_skip(pb, 22); // skip reserved fields and Data Size
185 if ((ret = detect_unknown_subobject(s, asf->unknown_offset,
186 asf->unknown_size)) < 0)
190 av_log(s, AV_LOG_ERROR, "Too small size %"PRIu64" (< 24).\n", size);
191 return AVERROR_INVALIDDATA;
193 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
245 return AVERROR_INVALIDDATA;
247 if ((ret = avio_get_str16le(pb, len, name,
248 sizeof(name))) < len)
249 avio_skip(pb, len - ret);
250 avpriv_new_chapter(s, i, (AVRational) { 1, 10000000 }, pts,
251 AV_NOPTS_VALUE, name);
253 align_position(pb, asf->offset, size);
258 static int asf_read_metadata(AVFormatContext *s, const char *title, uint16_t len,
259 unsigned char *ch, uint16_t buflen)
261 AVIOContext *pb = s->pb;
263 avio_get_str16le(pb, len, ch, buflen);
265 if (av_dict_set(&s->metadata, title, ch, 0) < 0)
266 av_log(s, AV_LOG_WARNING, "av_dict_set failed.\n");
272 static int asf_read_value(AVFormatContext *s, const uint8_t *name,
273 uint16_t val_len, int type, AVDictionary **met)
277 uint16_t buflen = 2 * val_len + 1;
278 AVIOContext *pb = s->pb;
280 value = av_malloc(buflen);
282 return AVERROR(ENOMEM);
283 if (type == ASF_UNICODE) {
284 // get_asf_string reads UTF-16 and converts it to UTF-8 which needs longer buffer
285 if ((ret = get_asf_string(pb, val_len, value, buflen)) < 0)
287 if (av_dict_set(met, name, value, 0) < 0)
288 av_log(s, AV_LOG_WARNING, "av_dict_set failed.\n");
291 if (val_len > sizeof(buf)) {
292 ret = AVERROR_INVALIDDATA;
295 if ((ret = avio_read(pb, value, val_len)) < 0)
297 if (ret < 2 * val_len)
300 value[2 * val_len - 1] = '\0';
301 snprintf(buf, sizeof(buf), "%s", value);
302 if (av_dict_set(met, name, buf, 0) < 0)
303 av_log(s, AV_LOG_WARNING, "av_dict_set failed.\n");
313 static int asf_read_generic_value(AVIOContext *pb, int type, uint64_t *value)
318 *value = avio_rl16(pb);
321 *value = avio_rl32(pb);
324 *value = avio_rl64(pb);
327 *value = avio_rl16(pb);
330 return AVERROR_INVALIDDATA;
336 static int asf_set_metadata(AVFormatContext *s, const uint8_t *name,
337 int type, AVDictionary **met)
339 AVIOContext *pb = s->pb;
344 ret = asf_read_generic_value(pb, type, &value);
348 snprintf(buf, sizeof(buf), "%"PRIu64, value);
349 if (av_dict_set(met, name, buf, 0) < 0)
350 av_log(s, AV_LOG_WARNING, "av_dict_set failed.\n");
355 static int process_metadata(AVFormatContext *s, const uint8_t *name, uint16_t name_len,
356 uint16_t val_len, uint16_t type, AVDictionary **met)
364 asf_read_value(s, name, val_len, type, met);
367 if (ff_asf_handle_byte_array(s, name, val_len) > 0)
368 asf_read_value(s, name, val_len, type, met);
371 ff_get_guid(s->pb, &guid);
374 if ((ret = asf_set_metadata(s, name, type, met)) < 0)
383 static int asf_read_ext_content(AVFormatContext *s, const GUIDParseTable *g)
385 ASFContext *asf = s->priv_data;
386 AVIOContext *pb = s->pb;
387 uint64_t size = avio_rl64(pb);
388 uint16_t nb_desc = avio_rl16(pb);
391 for (i = 0; i < nb_desc; i++) {
392 uint16_t name_len, type, val_len;
393 uint8_t *name = NULL;
395 name_len = avio_rl16(pb);
397 return AVERROR_INVALIDDATA;
398 name = av_malloc(name_len);
400 return AVERROR(ENOMEM);
401 avio_get_str16le(pb, name_len, name,
403 type = avio_rl16(pb);
404 // BOOL values are 16 bits long in the Metadata Object
405 // but 32 bits long in the Extended Content Description Object
406 if (type == ASF_BOOL)
408 val_len = avio_rl16(pb);
410 ret = process_metadata(s, name, name_len, val_len, type, &s->metadata);
416 align_position(pb, asf->offset, size);
420 static AVStream *find_stream(AVFormatContext *s, uint16_t st_num)
423 ASFContext *asf = s->priv_data;
426 for (i = 0; i < asf->nb_streams; i++) {
427 if (asf->asf_st[i]->stream_index == st_num) {
428 st = s->streams[asf->asf_st[i]->index];
436 static int asf_store_aspect_ratio(AVFormatContext *s, uint8_t st_num, uint8_t *name, int type)
438 ASFContext *asf = s->priv_data;
439 AVIOContext *pb = s->pb;
443 ret = asf_read_generic_value(pb, type, &value);
447 if (st_num < ASF_MAX_STREAMS) {
448 if (!strcmp(name, "AspectRatioX"))
449 asf->asf_sd[st_num].aspect_ratio.num = value;
451 asf->asf_sd[st_num].aspect_ratio.den = value;
456 static int asf_read_metadata_obj(AVFormatContext *s, const GUIDParseTable *g)
458 ASFContext *asf = s->priv_data;
459 AVIOContext *pb = s->pb;
460 uint64_t size = avio_rl64(pb);
461 uint16_t nb_recs = avio_rl16(pb); // number of records in the Description Records list
464 for (i = 0; i < nb_recs; i++) {
465 uint16_t name_len, buflen, type, val_len, st_num;
466 uint8_t *name = NULL;
468 avio_skip(pb, 2); // skip reserved field
469 st_num = avio_rl16(pb);
470 name_len = avio_rl16(pb);
471 buflen = 2 * name_len + 1;
474 type = avio_rl16(pb);
475 val_len = avio_rl32(pb);
476 name = av_malloc(buflen);
478 return AVERROR(ENOMEM);
479 avio_get_str16le(pb, name_len, name,
481 if (!strcmp(name, "AspectRatioX") || !strcmp(name, "AspectRatioY")) {
482 ret = asf_store_aspect_ratio(s, st_num, name, type);
488 if (st_num < ASF_MAX_STREAMS) {
489 if ((ret = process_metadata(s, name, name_len, val_len, type,
490 st_num ? &asf->asf_sd[st_num].asf_met
491 : &s->metadata)) < 0) {
500 align_position(pb, asf->offset, size);
504 static int asf_read_content_desc(AVFormatContext *s, const GUIDParseTable *g)
506 ASFContext *asf = s->priv_data;
507 AVIOContext *pb = s->pb;
509 static const char *const titles[] =
510 { "Title", "Author", "Copyright", "Description", "Rate" };
511 uint16_t len[5], buflen[5] = { 0 };
513 uint64_t size = avio_rl64(pb);
515 for (i = 0; i < 5; i++) {
516 len[i] = avio_rl16(pb);
517 // utf8 string should be <= 2 * utf16 string, extra byte for the terminator
518 buflen[i] = 2 * len[i] + 1;
521 for (i = 0; i < 5; i++) {
522 ch = av_malloc(buflen[i]);
524 return(AVERROR(ENOMEM));
525 asf_read_metadata(s, titles[i], len[i], ch, buflen[i]);
528 align_position(pb, asf->offset, size);
533 static int asf_read_properties(AVFormatContext *s, const GUIDParseTable *g)
535 ASFContext *asf = s->priv_data;
536 AVIOContext *pb = s->pb;
537 time_t creation_time;
539 avio_rl64(pb); // read object size
540 avio_skip(pb, 16); // skip File ID
541 avio_skip(pb, 8); // skip File size
542 creation_time = avio_rl64(pb);
543 if (!(asf->b_flags & ASF_FLAG_BROADCAST)) {
548 // creation date is in 100 ns units from 1 Jan 1601, conversion to s
549 creation_time /= 10000000;
550 // there are 11644473600 seconds between 1 Jan 1601 and 1 Jan 1970
551 creation_time -= 11644473600;
552 tm = gmtime_r(&creation_time, &tmbuf);
554 if (!strftime(buf, sizeof(buf), "%Y-%m-%d %H:%M:%S", tm))
559 if (av_dict_set(&s->metadata, "creation_time", buf, 0) < 0)
560 av_log(s, AV_LOG_WARNING, "av_dict_set failed.\n");
563 asf->nb_packets = avio_rl64(pb);
564 asf->duration = avio_rl64(pb) / 10000; // stream duration
565 avio_skip(pb, 8); // skip send duration
566 asf->preroll = avio_rl64(pb);
567 asf->duration -= asf->preroll;
568 asf->b_flags = avio_rl32(pb);
569 avio_skip(pb, 4); // skip minimal packet size
570 asf->packet_size = avio_rl32(pb);
571 avio_skip(pb, 4); // skip max_bitrate
576 static int parse_video_info(AVFormatContext *avfmt, AVIOContext *pb, AVStream *st)
578 uint16_t size_asf; // ASF-specific Format Data size
579 uint32_t size_bmp; // BMP_HEADER-specific Format Data size
582 st->codecpar->width = avio_rl32(pb);
583 st->codecpar->height = avio_rl32(pb);
584 avio_skip(pb, 1); // skip reserved flags
585 size_asf = avio_rl16(pb);
586 tag = ff_get_bmp_header(pb, st, &size_bmp);
587 st->codecpar->codec_tag = tag;
588 st->codecpar->codec_id = ff_codec_get_id(ff_codec_bmp_tags, tag);
589 size_bmp = FFMAX(size_asf, size_bmp);
591 if (size_bmp > BMP_HEADER_SIZE) {
592 int ret = ff_get_extradata(avfmt, st->codecpar, pb, size_bmp - BMP_HEADER_SIZE);
600 static int asf_read_stream_properties(AVFormatContext *s, const GUIDParseTable *g)
602 ASFContext *asf = s->priv_data;
603 AVIOContext *pb = s->pb;
605 uint32_t err_data_len, ts_data_len; // type specific data length
607 ff_asf_guid stream_type;
608 enum AVMediaType type;
610 uint8_t stream_index;
614 // ASF file must not contain more than 128 streams according to the specification
615 if (asf->nb_streams >= ASF_MAX_STREAMS)
616 return AVERROR_INVALIDDATA;
618 size = avio_rl64(pb);
619 ff_get_guid(pb, &stream_type);
620 if (!ff_guidcmp(&stream_type, &ff_asf_audio_stream))
621 type = AVMEDIA_TYPE_AUDIO;
622 else if (!ff_guidcmp(&stream_type, &ff_asf_video_stream))
623 type = AVMEDIA_TYPE_VIDEO;
624 else if (!ff_guidcmp(&stream_type, &ff_asf_jfif_media))
625 type = AVMEDIA_TYPE_VIDEO;
626 else if (!ff_guidcmp(&stream_type, &ff_asf_command_stream))
627 type = AVMEDIA_TYPE_DATA;
628 else if (!ff_guidcmp(&stream_type,
629 &ff_asf_ext_stream_embed_stream_header))
630 type = AVMEDIA_TYPE_UNKNOWN;
632 return AVERROR_INVALIDDATA;
634 ff_get_guid(pb, &stream_type); // error correction type
635 avio_skip(pb, 8); // skip the time offset
636 ts_data_len = avio_rl32(pb);
637 err_data_len = avio_rl32(pb);
638 flags = avio_rl16(pb); // bit 15 - Encrypted Content
640 stream_index = flags & ASF_STREAM_NUM;
641 for (i = 0; i < asf->nb_streams; i++)
642 if (stream_index == asf->asf_st[i]->stream_index) {
643 av_log(s, AV_LOG_WARNING,
644 "Duplicate stream found, this stream will be ignored.\n");
645 align_position(pb, asf->offset, size);
649 st = avformat_new_stream(s, NULL);
651 return AVERROR(ENOMEM);
652 avpriv_set_pts_info(st, 32, 1, 1000); // pts should be dword, in milliseconds
653 st->codecpar->codec_type = type;
654 asf->asf_st[asf->nb_streams] = av_mallocz(sizeof(*asf_st));
655 if (!asf->asf_st[asf->nb_streams])
656 return AVERROR(ENOMEM);
657 asf_st = asf->asf_st[asf->nb_streams];
659 asf_st->stream_index = stream_index;
660 asf_st->index = st->index;
662 st->id = flags & ASF_STREAM_NUM;
663 asf_st->pkt.data_size = 0;
664 asf_st->pkt.avpkt = av_packet_alloc();
665 if (!asf_st->pkt.avpkt)
666 return AVERROR(ENOMEM);
667 avio_skip(pb, 4); // skip reserved field
670 case AVMEDIA_TYPE_AUDIO:
671 asf_st->type = AVMEDIA_TYPE_AUDIO;
672 if ((ret = ff_get_wav_header(s, pb, st->codecpar, ts_data_len, 0)) < 0)
675 case AVMEDIA_TYPE_VIDEO:
676 asf_st->type = AVMEDIA_TYPE_VIDEO;
677 if ((ret = parse_video_info(s, pb, st)) < 0)
681 avio_skip(pb, ts_data_len);
686 if (type == AVMEDIA_TYPE_AUDIO) {
687 uint8_t span = avio_r8(pb);
690 asf_st->virtual_pkt_len = avio_rl16(pb);
691 asf_st->virtual_chunk_len = avio_rl16(pb);
692 if (!asf_st->virtual_chunk_len || !asf_st->virtual_pkt_len)
693 return AVERROR_INVALIDDATA;
694 avio_skip(pb, err_data_len - 5);
696 avio_skip(pb, err_data_len - 1);
698 avio_skip(pb, err_data_len);
701 align_position(pb, asf->offset, size);
706 static void set_language(AVFormatContext *s, const char *rfc1766, AVDictionary **met)
708 // language abbr should contain at least 2 chars
709 if (rfc1766 && strlen(rfc1766) > 1) {
710 const char primary_tag[3] = { rfc1766[0], rfc1766[1], '\0' }; // ignore country code if any
711 const char *iso6392 = ff_convert_lang_to(primary_tag,
712 AV_LANG_ISO639_2_BIBL);
714 if (av_dict_set(met, "language", iso6392, 0) < 0)
715 av_log(s, AV_LOG_WARNING, "av_dict_set failed.\n");
719 static int asf_read_ext_stream_properties(AVFormatContext *s, const GUIDParseTable *g)
721 ASFContext *asf = s->priv_data;
722 AVIOContext *pb = s->pb;
725 uint16_t nb_st_name, nb_pay_exts, st_num, lang_idx;
728 uint64_t start_time, end_time, time_per_frame;
729 uint64_t size = avio_rl64(pb);
731 start_time = avio_rl64(pb);
732 end_time = avio_rl64(pb);
733 bitrate = avio_rl32(pb);
734 avio_skip(pb, 28); // skip some unused values
735 st_num = avio_rl16(pb);
736 st_num &= ASF_STREAM_NUM;
737 lang_idx = avio_rl16(pb); // Stream Language ID Index
738 if (lang_idx >= ASF_MAX_STREAMS)
739 return AVERROR_INVALIDDATA;
740 for (i = 0; i < asf->nb_streams; i++) {
741 if (st_num == asf->asf_st[i]->stream_index) {
742 st = s->streams[asf->asf_st[i]->index];
743 asf->asf_st[i]->lang_idx = lang_idx;
747 time_per_frame = avio_rl64(pb); // average time per frame
749 st->start_time = start_time;
750 st->duration = end_time - start_time;
751 st->codecpar->bit_rate = bitrate;
752 st->avg_frame_rate.num = 10000000;
753 st->avg_frame_rate.den = time_per_frame;
755 nb_st_name = avio_rl16(pb);
756 nb_pay_exts = avio_rl16(pb);
757 for (i = 0; i < nb_st_name; i++) {
760 avio_rl16(pb); // Language ID Index
765 for (i = 0; i < nb_pay_exts; i++) {
767 avio_skip(pb, 16); // Extension System ID
768 avio_skip(pb, 2); // Extension Data Size
773 if ((ret = ff_get_guid(pb, &guid)) < 0) {
774 align_position(pb, asf->offset, size);
780 if (g && !(strcmp(g->name, "Stream Properties"))) {
781 if ((ret = g->read_object(s, g)) < 0)
785 align_position(pb, asf->offset, size);
789 static int asf_read_language_list(AVFormatContext *s, const GUIDParseTable *g)
791 ASFContext *asf = s->priv_data;
792 AVIOContext *pb = s->pb;
794 uint64_t size = avio_rl64(pb);
795 uint16_t nb_langs = avio_rl16(pb);
797 if (nb_langs < ASF_MAX_STREAMS) {
798 for (i = 0; i < nb_langs; i++) {
803 if ((ret = get_asf_string(pb, len, asf->asf_sd[i].langs,
804 sizeof(asf->asf_sd[i].langs))) < 0) {
810 align_position(pb, asf->offset, size);
814 // returns data object offset when reading this object for the first time
815 static int asf_read_data(AVFormatContext *s, const GUIDParseTable *g)
817 ASFContext *asf = s->priv_data;
818 AVIOContext *pb = s->pb;
819 uint64_t size = asf->data_size = avio_rl64(pb);
822 if (!asf->data_reached) {
823 asf->data_reached = 1;
824 asf->data_offset = asf->offset;
827 for (i = 0; i < asf->nb_streams; i++) {
828 if (!(asf->b_flags & ASF_FLAG_BROADCAST))
829 s->streams[i]->duration = asf->duration;
831 asf->nb_mult_left = 0;
833 asf->state = PARSE_PACKET_HEADER;
834 asf->return_subpayload = 0;
835 asf->packet_size_internal = 0;
836 avio_skip(pb, 16); // skip File ID
837 size = avio_rl64(pb); // Total Data Packets
838 if (size != asf->nb_packets)
839 av_log(s, AV_LOG_WARNING,
840 "Number of Packets from File Properties Object is not equal to Total"
841 "Datapackets value! num of packets %"PRIu64" total num %"PRIu64".\n",
842 size, asf->nb_packets);
843 avio_skip(pb, 2); // skip reserved field
844 asf->first_packet_offset = avio_tell(pb);
845 if ((pb->seekable & AVIO_SEEKABLE_NORMAL) && !(asf->b_flags & ASF_FLAG_BROADCAST))
846 align_position(pb, asf->offset, asf->data_size);
851 static int asf_read_simple_index(AVFormatContext *s, const GUIDParseTable *g)
853 ASFContext *asf = s->priv_data;
854 AVIOContext *pb = s->pb;
856 uint64_t interval; // index entry time interval in 100 ns units, usually it's 1s
857 uint32_t pkt_num, nb_entries;
858 int32_t prev_pkt_num = -1;
861 uint64_t size = avio_rl64(pb);
863 // simple index objects should be ordered by stream number, this loop tries to find
864 // the first not indexed video stream
865 for (i = 0; i < asf->nb_streams; i++) {
866 if ((asf->asf_st[i]->type == AVMEDIA_TYPE_VIDEO) && !asf->asf_st[i]->indexed) {
867 asf->asf_st[i]->indexed = 1;
868 st = s->streams[asf->asf_st[i]->index];
873 avio_skip(pb, size - 24); // if there's no video stream, skip index object
876 avio_skip(pb, 16); // skip File ID
877 interval = avio_rl64(pb);
879 nb_entries = avio_rl32(pb);
880 for (i = 0; i < nb_entries; i++) {
881 pkt_num = avio_rl32(pb);
882 offset = avio_skip(pb, 2);
884 av_log(s, AV_LOG_ERROR, "Skipping failed in asf_read_simple_index.\n");
887 if (prev_pkt_num != pkt_num) {
888 av_add_index_entry(st, asf->first_packet_offset + asf->packet_size *
889 pkt_num, av_rescale(interval, i, 10000),
890 asf->packet_size, 0, AVINDEX_KEYFRAME);
891 prev_pkt_num = pkt_num;
894 asf->is_simple_index = 1;
895 align_position(pb, asf->offset, size);
900 static const GUIDParseTable gdef[] = {
901 { "Data", { 0x75, 0xB2, 0x26, 0x36, 0x66, 0x8E, 0x11, 0xCF, 0xA6, 0xD9, 0x00, 0xAA, 0x00, 0x62, 0xCE, 0x6C }, asf_read_data, 1 },
902 { "Simple Index", { 0x33, 0x00, 0x08, 0x90, 0xE5, 0xB1, 0x11, 0xCF, 0x89, 0xF4, 0x00, 0xA0, 0xC9, 0x03, 0x49, 0xCB }, asf_read_simple_index, 1 },
903 { "Content Description", { 0x75, 0xB2, 0x26, 0x33, 0x66 ,0x8E, 0x11, 0xCF, 0xA6, 0xD9, 0x00, 0xAA, 0x00, 0x62, 0xCE, 0x6C }, asf_read_content_desc, 1 },
904 { "Extended Content Description", { 0xD2, 0xD0, 0xA4, 0x40, 0xE3, 0x07, 0x11, 0xD2, 0x97, 0xF0, 0x00, 0xA0, 0xC9, 0x5e, 0xA8, 0x50 }, asf_read_ext_content, 1 },
905 { "Stream Bitrate Properties", { 0x7B, 0xF8, 0x75, 0xCE, 0x46, 0x8D, 0x11, 0xD1, 0x8D, 0x82, 0x00, 0x60, 0x97, 0xC9, 0xA2, 0xB2 }, asf_read_unknown, 1 },
906 { "File Properties", { 0x8C, 0xAB, 0xDC, 0xA1, 0xA9, 0x47, 0x11, 0xCF, 0x8E, 0xE4, 0x00, 0xC0, 0x0C, 0x20, 0x53, 0x65 }, asf_read_properties, 1 },
907 { "Header Extension", { 0x5F, 0xBF, 0x03, 0xB5, 0xA9, 0x2E, 0x11, 0xCF, 0x8E, 0xE3, 0x00, 0xC0, 0x0C, 0x20, 0x53, 0x65 }, asf_read_unknown, 0 },
908 { "Stream Properties", { 0xB7, 0xDC, 0x07, 0x91, 0xA9, 0xB7, 0x11, 0xCF, 0x8E, 0xE6, 0x00, 0xC0, 0x0C, 0x20, 0x53, 0x65 }, asf_read_stream_properties, 1 },
909 { "Codec List", { 0x86, 0xD1, 0x52, 0x40, 0x31, 0x1D, 0x11, 0xD0, 0xA3, 0xA4, 0x00, 0xA0, 0xC9, 0x03, 0x48, 0xF6 }, asf_read_unknown, 1 },
910 { "Marker", { 0xF4, 0x87, 0xCD, 0x01, 0xA9, 0x51, 0x11, 0xCF, 0x8E, 0xE6, 0x00, 0xC0, 0x0C, 0x20, 0x53, 0x65 }, asf_read_marker, 1 },
911 { "Script Command", { 0x1E, 0xFB, 0x1A, 0x30, 0x0B, 0x62, 0x11, 0xD0, 0xA3, 0x9B, 0x00, 0xA0, 0xC9, 0x03, 0x48, 0xF6 }, asf_read_unknown, 1 },
912 { "Language List", { 0x7C, 0x43, 0x46, 0xa9, 0xef, 0xe0, 0x4B, 0xFC, 0xB2, 0x29, 0x39, 0x3e, 0xde, 0x41, 0x5c, 0x85 }, asf_read_language_list, 1},
913 { "Padding", { 0x18, 0x06, 0xD4, 0x74, 0xCA, 0xDF, 0x45, 0x09, 0xA4, 0xBA, 0x9A, 0xAB, 0xCB, 0x96, 0xAA, 0xE8 }, asf_read_unknown, 1 },
914 { "DRMv1 Header", { 0x22, 0x11, 0xB3, 0xFB, 0xBD, 0x23, 0x11, 0xD2, 0xB4, 0xB7, 0x00, 0xA0, 0xC9, 0x55, 0xFC, 0x6E }, asf_read_unknown, 1 },
915 { "DRMv2 Header", { 0x29, 0x8A, 0xE6, 0x14, 0x26, 0x22, 0x4C, 0x17, 0xB9, 0x35, 0xDA, 0xE0, 0x7E, 0xE9, 0x28, 0x9c }, asf_read_unknown, 1 },
916 { "Index", { 0xD6, 0xE2, 0x29, 0xD3, 0x35, 0xDA, 0x11, 0xD1, 0x90, 0x34, 0x00, 0xA0, 0xC9, 0x03, 0x49, 0xBE }, asf_read_unknown, 1 },
917 { "Media Object Index", { 0xFE, 0xB1, 0x03, 0xF8, 0x12, 0xAD, 0x4C, 0x64, 0x84, 0x0F, 0x2A, 0x1D, 0x2F, 0x7A, 0xD4, 0x8C }, asf_read_unknown, 1 },
918 { "Timecode Index", { 0x3C, 0xB7, 0x3F, 0xD0, 0x0C, 0x4A, 0x48, 0x03, 0x95, 0x3D, 0xED, 0xF7, 0xB6, 0x22, 0x8F, 0x0C }, asf_read_unknown, 0 },
919 { "Bitrate_Mutual_Exclusion", { 0xD6, 0xE2, 0x29, 0xDC, 0x35, 0xDA, 0x11, 0xD1, 0x90, 0x34, 0x00, 0xA0, 0xC9, 0x03, 0x49, 0xBE }, asf_read_unknown, 1 },
920 { "Error Correction", { 0x75, 0xB2, 0x26, 0x35, 0x66, 0x8E, 0x11, 0xCF, 0xA6, 0xD9, 0x00, 0xAA, 0x00, 0x62, 0xCE, 0x6C }, asf_read_unknown, 1 },
921 { "Content Branding", { 0x22, 0x11, 0xB3, 0xFA, 0xBD, 0x23, 0x11, 0xD2, 0xB4, 0xB7, 0x00, 0xA0, 0xC9, 0x55, 0xFC, 0x6E }, asf_read_unknown, 1 },
922 { "Content Encryption", { 0x22, 0x11, 0xB3, 0xFB, 0xBD, 0x23, 0x11, 0xD2, 0xB4, 0xB7, 0x00, 0xA0, 0xC9, 0x55, 0xFC, 0x6E }, asf_read_unknown, 1 },
923 { "Extended Content Encryption", { 0x29, 0x8A, 0xE6, 0x14, 0x26, 0x22, 0x4C, 0x17, 0xB9, 0x35, 0xDA, 0xE0, 0x7E, 0xE9, 0x28, 0x9C }, asf_read_unknown, 1 },
924 { "Digital Signature", { 0x22, 0x11, 0xB3, 0xFC, 0xBD, 0x23, 0x11, 0xD2, 0xB4, 0xB7, 0x00, 0xA0, 0xC9, 0x55, 0xFC, 0x6E }, asf_read_unknown, 1 },
925 { "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 },
926 { "Advanced Mutual Exclusion", { 0xA0, 0x86, 0x49, 0xCF, 0x47, 0x75, 0x46, 0x70, 0x8A, 0x16, 0x6E, 0x35, 0x35, 0x75, 0x66, 0xCD }, asf_read_unknown, 1 },
927 { "Group Mutual Exclusion", { 0xD1, 0x46, 0x5A, 0x40, 0x5A, 0x79, 0x43, 0x38, 0xB7, 0x1B, 0xE3, 0x6B, 0x8F, 0xD6, 0xC2, 0x49 }, asf_read_unknown, 1},
928 { "Stream Prioritization", { 0xD4, 0xFE, 0xD1, 0x5B, 0x88, 0xD3, 0x45, 0x4F, 0x81, 0xF0, 0xED, 0x5C, 0x45, 0x99, 0x9E, 0x24 }, asf_read_unknown, 1 },
929 { "Bandwidth Sharing Object", { 0xA6, 0x96, 0x09, 0xE6, 0x51, 0x7B, 0x11, 0xD2, 0xB6, 0xAF, 0x00, 0xC0, 0x4F, 0xD9, 0x08, 0xE9 }, asf_read_unknown, 1 },
930 { "Metadata", { 0xC5, 0xF8, 0xCB, 0xEA, 0x5B, 0xAF, 0x48, 0x77, 0x84, 0x67, 0xAA, 0x8C, 0x44, 0xFA, 0x4C, 0xCA }, asf_read_metadata_obj, 1 },
931 { "Metadata Library", { 0x44, 0x23, 0x1C, 0x94, 0x94, 0x98, 0x49, 0xD1, 0xA1, 0x41, 0x1D, 0x13, 0x4E, 0x45, 0x70, 0x54 }, asf_read_metadata_obj, 1 },
932 { "Audio Spread", { 0xBF, 0xC3, 0xCD, 0x50, 0x61, 0x8F, 0x11, 0xCF, 0x8B, 0xB2, 0x00, 0xAA, 0x00, 0xB4, 0xE2, 0x20 }, asf_read_unknown, 1 },
933 { "Index Parameters", { 0xD6, 0xE2, 0x29, 0xDF, 0x35, 0xDA, 0x11, 0xD1, 0x90, 0x34, 0x00, 0xA0, 0xC9, 0x03, 0x49, 0xBE }, asf_read_unknown, 1 },
934 { "Content Encryption System Windows Media DRM Network Devices",
935 { 0x7A, 0x07, 0x9B, 0xB6, 0xDA, 0XA4, 0x4e, 0x12, 0xA5, 0xCA, 0x91, 0xD3, 0x8D, 0xC1, 0x1A, 0x8D }, asf_read_unknown, 1 },
936 { "Mutex Language", { 0xD6, 0xE2, 0x2A, 0x00, 0x25, 0xDA, 0x11, 0xD1, 0x90, 0x34, 0x00, 0xA0, 0xC9, 0x03, 0x49, 0xBE }, asf_read_unknown, 1 },
937 { "Mutex Bitrate", { 0xD6, 0xE2, 0x2A, 0x01, 0x25, 0xDA, 0x11, 0xD1, 0x90, 0x34, 0x00, 0xA0, 0xC9, 0x03, 0x49, 0xBE }, asf_read_unknown, 1 },
938 { "Mutex Unknown", { 0xD6, 0xE2, 0x2A, 0x02, 0x25, 0xDA, 0x11, 0xD1, 0x90, 0x34, 0x00, 0xA0, 0xC9, 0x03, 0x49, 0xBE }, asf_read_unknown, 1 },
939 { "Bandwidth Sharing Exclusive", { 0xAF, 0x60, 0x60, 0xAA, 0x51, 0x97, 0x11, 0xD2, 0xB6, 0xAF, 0x00, 0xC0, 0x4F, 0xD9, 0x08, 0xE9 }, asf_read_unknown, 1 },
940 { "Bandwidth Sharing Partial", { 0xAF, 0x60, 0x60, 0xAB, 0x51, 0x97, 0x11, 0xD2, 0xB6, 0xAF, 0x00, 0xC0, 0x4F, 0xD9, 0x08, 0xE9 }, asf_read_unknown, 1 },
941 { "Payload Extension System Timecode", { 0x39, 0x95, 0x95, 0xEC, 0x86, 0x67, 0x4E, 0x2D, 0x8F, 0xDB, 0x98, 0x81, 0x4C, 0xE7, 0x6C, 0x1E }, asf_read_unknown, 1 },
942 { "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 },
943 { "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 },
944 { "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 },
945 { "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 },
946 { "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 },
947 { "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 },
950 #define READ_LEN(flag, name, len) \
952 if ((flag) == name ## IS_BYTE) \
954 else if ((flag) == name ## IS_WORD) \
955 len = avio_rl16(pb); \
956 else if ((flag) == name ## IS_DWORD) \
957 len = avio_rl32(pb); \
962 static int asf_read_subpayload(AVFormatContext *s, AVPacket *pkt, int is_header)
964 ASFContext *asf = s->priv_data;
965 AVIOContext *pb = s->pb;
970 asf->dts_delta = avio_r8(pb);
971 if (asf->nb_mult_left) {
972 asf->mult_sub_len = avio_rl16(pb); // total
974 asf->sub_header_offset = avio_tell(pb);
978 sub_len = avio_r8(pb);
979 if ((ret = av_get_packet(pb, pkt, sub_len)) < 0) // each subpayload is entire frame
981 for (i = 0; i < asf->nb_streams; i++) {
982 if (asf->stream_index == asf->asf_st[i]->stream_index) {
983 pkt->stream_index = asf->asf_st[i]->index;
987 asf->return_subpayload = 1;
989 asf->return_subpayload = 0;
993 pkt->dts = asf->sub_dts + (asf->nb_sub - 1) * asf->dts_delta - asf->preroll;
994 if (asf->nb_mult_left && (avio_tell(pb) >=
995 (asf->sub_header_offset + asf->mult_sub_len))) {
999 if (avio_tell(pb) >= asf->packet_offset + asf->packet_size - asf->pad_len) {
1001 if (!asf->nb_mult_left) {
1002 avio_skip(pb, asf->pad_len);
1003 if (avio_tell(pb) != asf->packet_offset + asf->packet_size) {
1004 if (!asf->packet_size)
1005 return AVERROR_INVALIDDATA;
1006 av_log(s, AV_LOG_WARNING,
1007 "Position %"PRId64" wrong, should be %"PRId64"\n",
1008 avio_tell(pb), asf->packet_offset + asf->packet_size);
1009 avio_seek(pb, asf->packet_offset + asf->packet_size, SEEK_SET);
1017 static void reset_packet(ASFPacket *asf_pkt)
1019 asf_pkt->size_left = 0;
1020 asf_pkt->data_size = 0;
1021 asf_pkt->duration = 0;
1024 av_packet_unref(asf_pkt->avpkt);
1027 static int asf_read_replicated_data(AVFormatContext *s, ASFPacket *asf_pkt)
1029 ASFContext *asf = s->priv_data;
1030 AVIOContext *pb = s->pb;
1033 if (!asf_pkt->data_size) {
1034 data_size = avio_rl32(pb); // read media object size
1036 return AVERROR_INVALIDDATA;
1037 if ((ret = av_new_packet(asf_pkt->avpkt, data_size)) < 0)
1039 asf_pkt->data_size = asf_pkt->size_left = data_size;
1041 avio_skip(pb, 4); // reading of media object size is already done
1042 asf_pkt->dts = avio_rl32(pb); // read presentation time
1043 if (asf->rep_data_len >= 8)
1044 avio_skip(pb, asf->rep_data_len - 8); // skip replicated data
1049 static int asf_read_multiple_payload(AVFormatContext *s, AVPacket *pkt,
1052 ASFContext *asf = s->priv_data;
1053 AVIOContext *pb = s->pb;
1059 // if replicated length is 1, subpayloads are present
1060 if (asf->rep_data_len == 1) {
1062 asf->state = READ_MULTI_SUB;
1063 pkt->flags = asf_pkt->flags;
1064 if ((ret = asf_read_subpayload(s, pkt, 1)) < 0)
1067 if (asf->rep_data_len)
1068 if ((ret = asf_read_replicated_data(s, asf_pkt)) < 0)
1070 pay_len = avio_rl16(pb); // payload length should be WORD
1071 if (pay_len > asf->packet_size) {
1072 av_log(s, AV_LOG_ERROR,
1073 "Error: invalid data packet size, pay_len %"PRIu16", "
1074 "asf->packet_size %"PRIu32", offset %"PRId64".\n",
1075 pay_len, asf->packet_size, avio_tell(pb));
1076 return AVERROR_INVALIDDATA;
1078 p = asf_pkt->avpkt->data + asf_pkt->data_size - asf_pkt->size_left;
1079 if (pay_len > asf_pkt->size_left) {
1080 av_log(s, AV_LOG_ERROR,
1081 "Error: invalid buffer size, pay_len %d, data size left %d.\n",
1082 pay_len, asf_pkt->size_left);
1083 skip = pay_len - asf_pkt->size_left;
1084 pay_len = asf_pkt->size_left;
1086 if (asf_pkt->size_left <= 0)
1087 return AVERROR_INVALIDDATA;
1088 if ((ret = avio_read(pb, p, pay_len)) < 0)
1090 if (s->key && s->keylen == 20)
1091 ff_asfcrypt_dec(s->key, p, ret);
1092 avio_skip(pb, skip);
1093 asf_pkt->size_left -= pay_len;
1094 asf->nb_mult_left--;
1100 static int asf_read_single_payload(AVFormatContext *s, ASFPacket *asf_pkt)
1102 ASFContext *asf = s->priv_data;
1103 AVIOContext *pb = s->pb;
1109 if (!asf_pkt->data_size) {
1110 data_size = avio_rl32(pb); // read media object size
1113 if ((ret = av_new_packet(asf_pkt->avpkt, data_size)) < 0)
1115 asf_pkt->data_size = asf_pkt->size_left = data_size;
1117 avio_skip(pb, 4); // skip media object size
1118 asf_pkt->dts = avio_rl32(pb); // read presentation time
1119 if (asf->rep_data_len >= 8)
1120 avio_skip(pb, asf->rep_data_len - 8); // skip replicated data
1121 offset = avio_tell(pb);
1123 // size of the payload - size of the packet without header and padding
1124 if (asf->packet_size_internal)
1125 size = asf->packet_size_internal - offset + asf->packet_offset - asf->pad_len;
1127 size = asf->packet_size - offset + asf->packet_offset - asf->pad_len;
1128 if (size > asf->packet_size) {
1129 av_log(s, AV_LOG_ERROR,
1130 "Error: invalid data packet size, offset %"PRId64".\n",
1132 return AVERROR_INVALIDDATA;
1134 p = asf_pkt->avpkt->data + asf_pkt->data_size - asf_pkt->size_left;
1135 if (size > asf_pkt->size_left || asf_pkt->size_left <= 0)
1136 return AVERROR_INVALIDDATA;
1137 if (asf_pkt->size_left > size)
1138 asf_pkt->size_left -= size;
1140 asf_pkt->size_left = 0;
1141 if ((ret = avio_read(pb, p, size)) < 0)
1143 if (s->key && s->keylen == 20)
1144 ff_asfcrypt_dec(s->key, p, ret);
1145 if (asf->packet_size_internal)
1146 avio_skip(pb, asf->packet_size - asf->packet_size_internal);
1147 avio_skip(pb, asf->pad_len); // skip padding
1152 static int asf_read_payload(AVFormatContext *s, AVPacket *pkt)
1154 ASFContext *asf = s->priv_data;
1155 AVIOContext *pb = s->pb;
1157 ASFPacket *asf_pkt = NULL;
1159 if (!asf->sub_left) {
1160 uint32_t off_len, media_len;
1163 stream_num = avio_r8(pb);
1164 asf->stream_index = stream_num & ASF_STREAM_NUM;
1165 for (i = 0; i < asf->nb_streams; i++) {
1166 if (asf->stream_index == asf->asf_st[i]->stream_index) {
1167 asf_pkt = &asf->asf_st[i]->pkt;
1168 asf_pkt->stream_index = asf->asf_st[i]->index;
1173 if (asf->packet_offset + asf->packet_size <= asf->data_offset + asf->data_size) {
1174 if (!asf->packet_size) {
1175 av_log(s, AV_LOG_ERROR, "Invalid packet size 0.\n");
1176 return AVERROR_INVALIDDATA;
1178 avio_seek(pb, asf->packet_offset + asf->packet_size, SEEK_SET);
1179 av_log(s, AV_LOG_WARNING, "Skipping the stream with the invalid stream index %d.\n",
1181 return AVERROR(EAGAIN);
1183 return AVERROR_INVALIDDATA;
1186 if (stream_num >> 7)
1187 asf_pkt->flags |= AV_PKT_FLAG_KEY;
1188 READ_LEN(asf->prop_flags & ASF_PL_MASK_MEDIA_OBJECT_NUMBER_LENGTH_FIELD_SIZE,
1189 ASF_PL_FLAG_MEDIA_OBJECT_NUMBER_LENGTH_FIELD_, media_len);
1190 READ_LEN(asf->prop_flags & ASF_PL_MASK_OFFSET_INTO_MEDIA_OBJECT_LENGTH_FIELD_SIZE,
1191 ASF_PL_FLAG_OFFSET_INTO_MEDIA_OBJECT_LENGTH_FIELD_, off_len);
1192 READ_LEN(asf->prop_flags & ASF_PL_MASK_REPLICATED_DATA_LENGTH_FIELD_SIZE,
1193 ASF_PL_FLAG_REPLICATED_DATA_LENGTH_FIELD_, asf->rep_data_len);
1194 if (asf_pkt->size_left && (asf_pkt->frame_num != media_len)) {
1195 av_log(s, AV_LOG_WARNING, "Unfinished frame will be ignored\n");
1196 reset_packet(asf_pkt);
1198 asf_pkt->frame_num = media_len;
1199 asf->sub_dts = off_len;
1200 if (asf->nb_mult_left) {
1201 if ((ret = asf_read_multiple_payload(s, pkt, asf_pkt)) < 0)
1203 } else if (asf->rep_data_len == 1) {
1205 asf->state = READ_SINGLE;
1206 pkt->flags = asf_pkt->flags;
1207 if ((ret = asf_read_subpayload(s, pkt, 1)) < 0)
1210 if ((ret = asf_read_single_payload(s, asf_pkt)) < 0)
1214 for (i = 0; i <= asf->nb_streams; i++) {
1215 if (asf->stream_index == asf->asf_st[i]->stream_index) {
1216 asf_pkt = &asf->asf_st[i]->pkt;
1221 return AVERROR_INVALIDDATA;
1222 pkt->flags = asf_pkt->flags;
1223 pkt->dts = asf_pkt->dts;
1224 pkt->stream_index = asf->asf_st[i]->index;
1225 if ((ret = asf_read_subpayload(s, pkt, 0)) < 0) // read subpayload without its header
1232 static int asf_read_packet_header(AVFormatContext *s)
1234 ASFContext *asf = s->priv_data;
1235 AVIOContext *pb = s->pb;
1237 uint32_t av_unused seq;
1238 unsigned char error_flags, len_flags, pay_flags;
1240 asf->packet_offset = avio_tell(pb);
1241 error_flags = avio_r8(pb); // read Error Correction Flags
1242 if (error_flags & ASF_PACKET_FLAG_ERROR_CORRECTION_PRESENT) {
1243 if (!(error_flags & ASF_ERROR_CORRECTION_LENGTH_TYPE)) {
1244 size = error_flags & ASF_PACKET_ERROR_CORRECTION_DATA_SIZE;
1245 avio_skip(pb, size);
1247 len_flags = avio_r8(pb);
1249 len_flags = error_flags;
1250 asf->prop_flags = avio_r8(pb);
1251 READ_LEN(len_flags & ASF_PPI_MASK_PACKET_LENGTH_FIELD_SIZE,
1252 ASF_PPI_FLAG_PACKET_LENGTH_FIELD_, asf->packet_size_internal);
1253 READ_LEN(len_flags & ASF_PPI_MASK_SEQUENCE_FIELD_SIZE,
1254 ASF_PPI_FLAG_SEQUENCE_FIELD_, seq);
1255 READ_LEN(len_flags & ASF_PPI_MASK_PADDING_LENGTH_FIELD_SIZE,
1256 ASF_PPI_FLAG_PADDING_LENGTH_FIELD_, asf->pad_len );
1257 asf->send_time = avio_rl32(pb); // send time
1258 avio_skip(pb, 2); // skip duration
1259 if (len_flags & ASF_PPI_FLAG_MULTIPLE_PAYLOADS_PRESENT) { // Multiple Payloads present
1260 pay_flags = avio_r8(pb);
1261 asf->nb_mult_left = (pay_flags & ASF_NUM_OF_PAYLOADS);
1267 static int asf_deinterleave(AVFormatContext *s, ASFPacket *asf_pkt, int st_num)
1269 ASFContext *asf = s->priv_data;
1270 ASFStream *asf_st = asf->asf_st[st_num];
1271 unsigned char *p = asf_pkt->avpkt->data;
1272 uint16_t pkt_len = asf->asf_st[st_num]->virtual_pkt_len;
1273 uint16_t chunk_len = asf->asf_st[st_num]->virtual_chunk_len;
1274 int nchunks = pkt_len / chunk_len;
1276 int pos = 0, j, l, ret;
1279 data = av_malloc(asf_pkt->data_size + AV_INPUT_BUFFER_PADDING_SIZE);
1281 return AVERROR(ENOMEM);
1282 memset(data + asf_pkt->data_size, 0, AV_INPUT_BUFFER_PADDING_SIZE);
1284 while (asf_pkt->data_size >= asf_st->span * pkt_len + pos) {
1285 if (pos >= asf_pkt->data_size) {
1288 for (l = 0; l < pkt_len; l++) {
1289 if (pos >= asf_pkt->data_size) {
1292 for (j = 0; j < asf_st->span; j++) {
1293 if ((pos + chunk_len) >= asf_pkt->data_size)
1296 p + (j * nchunks + l) * chunk_len,
1301 p += asf_st->span * pkt_len;
1302 if (p > asf_pkt->avpkt->data + asf_pkt->data_size)
1305 av_packet_unref(asf_pkt->avpkt);
1306 ret = av_packet_from_data(asf_pkt->avpkt, data, asf_pkt->data_size);
1313 static int asf_read_packet(AVFormatContext *s, AVPacket *pkt)
1315 ASFContext *asf = s->priv_data;
1316 AVIOContext *pb = s->pb;
1319 if ((avio_tell(pb) >= asf->data_offset + asf->data_size) &&
1320 !(asf->b_flags & ASF_FLAG_BROADCAST))
1322 while (!pb->eof_reached) {
1323 if (asf->state == PARSE_PACKET_HEADER) {
1324 asf_read_packet_header(s);
1325 if (pb->eof_reached)
1327 if (!asf->nb_mult_left)
1328 asf->state = READ_SINGLE;
1330 asf->state = READ_MULTI;
1332 ret = asf_read_payload(s, pkt);
1333 if (ret == AVERROR(EAGAIN)) {
1334 asf->state = PARSE_PACKET_HEADER;
1340 switch (asf->state) {
1343 asf->state = PARSE_PACKET_HEADER;
1345 case READ_MULTI_SUB:
1346 if (!asf->sub_left && !asf->nb_mult_left) {
1347 asf->state = PARSE_PACKET_HEADER;
1348 if (!asf->return_subpayload &&
1349 (avio_tell(pb) <= asf->packet_offset +
1350 asf->packet_size - asf->pad_len))
1351 avio_skip(pb, asf->pad_len); // skip padding
1352 if (asf->packet_offset + asf->packet_size > avio_tell(pb))
1353 avio_seek(pb, asf->packet_offset + asf->packet_size, SEEK_SET);
1354 } else if (!asf->sub_left)
1355 asf->state = READ_MULTI;
1358 if (!asf->nb_mult_left) {
1359 asf->state = PARSE_PACKET_HEADER;
1360 if (!asf->return_subpayload &&
1361 (avio_tell(pb) <= asf->packet_offset +
1362 asf->packet_size - asf->pad_len))
1363 avio_skip(pb, asf->pad_len); // skip padding
1364 if (asf->packet_offset + asf->packet_size > avio_tell(pb))
1365 avio_seek(pb, asf->packet_offset + asf->packet_size, SEEK_SET);
1369 if (asf->return_subpayload) {
1370 asf->return_subpayload = 0;
1373 for (i = 0; i < asf->nb_streams; i++) {
1374 ASFPacket *asf_pkt = &asf->asf_st[i]->pkt;
1375 if (asf_pkt && !asf_pkt->size_left && asf_pkt->data_size) {
1376 if (asf->asf_st[i]->span > 1 &&
1377 asf->asf_st[i]->type == AVMEDIA_TYPE_AUDIO)
1378 if ((ret = asf_deinterleave(s, asf_pkt, i)) < 0)
1380 av_packet_move_ref(pkt, asf_pkt->avpkt);
1381 pkt->stream_index = asf->asf_st[i]->index;
1382 pkt->flags = asf_pkt->flags;
1383 pkt->dts = asf_pkt->dts - asf->preroll;
1384 asf_pkt->data_size = 0;
1385 asf_pkt->frame_num = 0;
1391 if (pb->eof_reached)
1397 static int asf_read_close(AVFormatContext *s)
1399 ASFContext *asf = s->priv_data;
1402 for (i = 0; i < ASF_MAX_STREAMS; i++) {
1403 av_dict_free(&asf->asf_sd[i].asf_met);
1404 if (i < asf->nb_streams) {
1405 av_packet_free(&asf->asf_st[i]->pkt.avpkt);
1406 av_freep(&asf->asf_st[i]);
1410 asf->nb_streams = 0;
1414 static void reset_packet_state(AVFormatContext *s)
1416 ASFContext *asf = s->priv_data;
1419 asf->state = PARSE_PACKET_HEADER;
1421 asf->return_subpayload = 0;
1423 asf->sub_header_offset = 0;
1424 asf->packet_offset = asf->first_packet_offset;
1426 asf->rep_data_len = 0;
1428 asf->mult_sub_len = 0;
1429 asf->nb_mult_left = 0;
1431 asf->prop_flags = 0;
1433 for (i = 0; i < asf->nb_streams; i++) {
1434 ASFPacket *pkt = &asf->asf_st[i]->pkt;
1440 * Find a timestamp for the requested position within the payload
1441 * where the pos (position) is the offset inside the Data Object.
1442 * When position is not on the packet boundary, asf_read_timestamp tries
1443 * to find the closest packet offset after this position. If this packet
1444 * is a key frame, this packet timestamp is read and an index entry is created
1445 * for the packet. If this packet belongs to the requested stream,
1446 * asf_read_timestamp upgrades pos to the packet beginning offset and
1447 * returns this packet's dts. So returned dts is the dts of the first key frame with
1448 * matching stream number after given position.
1450 static int64_t asf_read_timestamp(AVFormatContext *s, int stream_index,
1451 int64_t *pos, int64_t pos_limit)
1453 ASFContext *asf = s->priv_data;
1454 int64_t pkt_pos = *pos, pkt_offset, dts = AV_NOPTS_VALUE, data_end;
1455 AVPacket *pkt = av_packet_alloc();
1459 return AVERROR(ENOMEM);
1461 data_end = asf->data_offset + asf->data_size;
1463 n = (pkt_pos - asf->first_packet_offset + asf->packet_size - 1) /
1465 n = av_clip(n, 0, ((data_end - asf->first_packet_offset) / asf->packet_size - 1));
1466 pkt_pos = asf->first_packet_offset + n * asf->packet_size;
1468 avio_seek(s->pb, pkt_pos, SEEK_SET);
1469 pkt_offset = pkt_pos;
1471 reset_packet_state(s);
1472 while (avio_tell(s->pb) < data_end) {
1474 int i, ret, st_found;
1476 pkt_offset = avio_tell(s->pb);
1477 if ((ret = asf_read_packet(s, pkt)) < 0) {
1478 av_packet_free(&pkt);
1479 dts = AV_NOPTS_VALUE;
1482 // ASFPacket may contain fragments of packets belonging to different streams,
1483 // pkt_offset is the offset of the first fragment within it.
1484 if ((pkt_offset >= (pkt_pos + asf->packet_size)))
1485 pkt_pos += asf->packet_size;
1486 for (i = 0; i < asf->nb_streams; i++) {
1487 ASFStream *st = asf->asf_st[i];
1490 if (pkt->flags & AV_PKT_FLAG_KEY) {
1493 av_add_index_entry(s->streams[pkt->stream_index], pkt_pos,
1494 dts, pkt->size, 0, AVINDEX_KEYFRAME);
1495 if (stream_index == st->index) {
1504 av_packet_unref(pkt);
1508 av_packet_free(&pkt);
1512 static int asf_read_seek(AVFormatContext *s, int stream_index,
1513 int64_t timestamp, int flags)
1515 ASFContext *asf = s->priv_data;
1518 if (s->streams[stream_index]->internal->nb_index_entries && asf->is_simple_index) {
1519 idx = av_index_search_timestamp(s->streams[stream_index], timestamp, flags);
1520 if (idx < 0 || idx >= s->streams[stream_index]->internal->nb_index_entries)
1521 return AVERROR_INVALIDDATA;
1522 avio_seek(s->pb, s->streams[stream_index]->internal->index_entries[idx].pos, SEEK_SET);
1524 if ((ret = ff_seek_frame_binary(s, stream_index, timestamp, flags)) < 0)
1528 reset_packet_state(s);
1533 static const GUIDParseTable *find_guid(ff_asf_guid guid)
1536 const GUIDParseTable *g;
1540 for (j = 0; j < FF_ARRAY_ELEMS(gdef); j++) {
1541 if (!(ret = memcmp(guid, g->guid, sizeof(g->guid))))
1549 static int detect_unknown_subobject(AVFormatContext *s, int64_t offset, int64_t size)
1551 ASFContext *asf = s->priv_data;
1552 AVIOContext *pb = s->pb;
1553 const GUIDParseTable *g = NULL;
1557 if (offset > INT64_MAX - size)
1558 return AVERROR_INVALIDDATA;
1560 while (avio_tell(pb) <= offset + size) {
1561 if (avio_tell(pb) == asf->offset)
1563 asf->offset = avio_tell(pb);
1564 if ((ret = ff_get_guid(pb, &guid)) < 0)
1566 g = find_guid(guid);
1568 if ((ret = g->read_object(s, g)) < 0)
1573 g2.name = "Unknown";
1574 g2.is_subobject = 1;
1575 asf_read_unknown(s, &g2);
1582 static int asf_read_header(AVFormatContext *s)
1584 ASFContext *asf = s->priv_data;
1585 AVIOContext *pb = s->pb;
1586 const GUIDParseTable *g = NULL;
1592 asf->is_simple_index = 0;
1593 ff_get_guid(pb, &guid);
1594 if (ff_guidcmp(&guid, &ff_asf_header))
1595 return AVERROR_INVALIDDATA;
1596 avio_skip(pb, 8); // skip header object size
1597 avio_skip(pb, 6); // skip number of header objects and 2 reserved bytes
1598 asf->data_reached = 0;
1600 /* 1 is here instead of pb->eof_reached because (when not streaming), Data are skipped
1601 * for the first time,
1602 * Index object is processed and got eof and then seeking back to the Data is performed.
1605 // for the cases when object size is invalid
1606 if (avio_tell(pb) == asf->offset)
1608 asf->offset = avio_tell(pb);
1609 if ((ret = ff_get_guid(pb, &guid)) < 0) {
1610 if (ret == AVERROR_EOF && asf->data_reached)
1615 g = find_guid(guid);
1617 asf->unknown_offset = asf->offset;
1619 if ((ret = g->read_object(s, g)) < 0)
1622 size = avio_rl64(pb);
1623 align_position(pb, asf->offset, size);
1625 if (asf->data_reached &&
1626 (!(pb->seekable & AVIO_SEEKABLE_NORMAL) ||
1627 (asf->b_flags & ASF_FLAG_BROADCAST)))
1631 if (!asf->data_reached) {
1632 av_log(s, AV_LOG_ERROR, "Data Object was not found.\n");
1633 ret = AVERROR_INVALIDDATA;
1636 if (pb->seekable & AVIO_SEEKABLE_NORMAL)
1637 avio_seek(pb, asf->first_packet_offset, SEEK_SET);
1639 for (i = 0; i < asf->nb_streams; i++) {
1640 const char *rfc1766 = asf->asf_sd[asf->asf_st[i]->lang_idx].langs;
1641 AVStream *st = s->streams[asf->asf_st[i]->index];
1642 set_language(s, rfc1766, &st->metadata);
1645 for (i = 0; i < ASF_MAX_STREAMS; i++) {
1646 AVStream *st = NULL;
1648 st = find_stream(s, i);
1650 av_dict_copy(&st->metadata, asf->asf_sd[i].asf_met, AV_DICT_IGNORE_SUFFIX);
1651 if (asf->asf_sd[i].aspect_ratio.num > 0 && asf->asf_sd[i].aspect_ratio.den > 0) {
1652 st->sample_aspect_ratio.num = asf->asf_sd[i].aspect_ratio.num;
1653 st->sample_aspect_ratio.den = asf->asf_sd[i].aspect_ratio.den;
1665 AVInputFormat ff_asf_o_demuxer = {
1667 .long_name = NULL_IF_CONFIG_SMALL("ASF (Advanced / Active Streaming Format)"),
1668 .priv_data_size = sizeof(ASFContext),
1669 .read_probe = asf_probe,
1670 .read_header = asf_read_header,
1671 .read_packet = asf_read_packet,
1672 .read_close = asf_read_close,
1673 .read_timestamp = asf_read_timestamp,
1674 .read_seek = asf_read_seek,
1675 .flags = AVFMT_NOBINSEARCH | AVFMT_NOGENSEARCH,