2 * Microsoft Advanced Streaming Format demuxer
3 * Copyright (c) 2014 Alexandra Hájková
5 * This file is part of FFmpeg.
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
22 #include "libavutil/attributes.h"
23 #include "libavutil/avstring.h"
24 #include "libavutil/bswap.h"
25 #include "libavutil/common.h"
26 #include "libavutil/dict.h"
27 #include "libavutil/internal.h"
28 #include "libavutil/mathematics.h"
29 #include "libavutil/opt.h"
30 #include "libavutil/time_internal.h"
33 #include "avio_internal.h"
34 #include "avlanguage.h"
46 #define ASF_UNICODE 0x0
47 #define ASF_FLAG_BROADCAST 0x1
48 #define ASF_BYTE_ARRAY 0x1
49 #define ASF_TYPE_AUDIO 0x2
50 #define ASF_TYPE_VIDEO 0x1
51 #define ASF_STREAM_NUM 0x7F
52 #define ASF_MAX_STREAMS 128
53 #define BMP_HEADER_SIZE 40
54 #define ASF_NUM_OF_PAYLOADS 0x3F
55 #define ASF_ERROR_CORRECTION_LENGTH_TYPE 0x60
56 #define ASF_PACKET_ERROR_CORRECTION_DATA_SIZE 0x2
58 typedef struct GUIDParseTable {
61 int (*read_object)(AVFormatContext *, const struct GUIDParseTable *);
65 typedef struct ASFPacket {
68 uint32_t frame_num; // ASF payloads with the same number are parts of the same frame
76 typedef struct ASFStream {
77 uint8_t stream_index; // from packet header
78 int index; // stream index in AVFormatContext, set in asf_read_stream_properties
80 int indexed; // added index entries from the Simple Index Object or not
81 int8_t span; // for deinterleaving
82 uint16_t virtual_pkt_len;
83 uint16_t virtual_chunk_len;
88 typedef struct ASFStreamData{
90 AVDictionary *asf_met; // for storing per-stream metadata
91 AVRational aspect_ratio;
94 typedef struct ASFContext {
96 int is_simple_index; // is simple index present or not 1/0
100 uint64_t nb_packets; // ASF packets
101 uint32_t packet_size;
105 uint32_t b_flags; // flags with broadcast flag
106 uint32_t prop_flags; // file properties object flags
108 uint64_t data_size; // data object size
109 uint64_t unknown_size; // size of the unknown object
111 int64_t offset; // offset of the current object
114 int64_t first_packet_offset; // packet offset
115 int64_t unknown_offset; // for top level header objects or subobjects without specified behavior
117 // ASF file must not contain more than 128 streams according to the specification
118 ASFStream *asf_st[ASF_MAX_STREAMS];
119 ASFStreamData asf_sd[ASF_MAX_STREAMS];
122 int stream_index; // from packet header, for the subpayload case
125 uint64_t sub_header_offset; // offset of subpayload header
127 uint8_t dts_delta; // for subpayloads
128 uint32_t packet_size_internal; // packet size stored inside ASFPacket, can be 0
129 int64_t packet_offset; // offset of the current packet inside Data Object
130 uint32_t pad_len; // padding after payload
131 uint32_t rep_data_len;
134 uint64_t sub_left; // subpayloads left or not
135 unsigned int nb_sub; // number of subpayloads read so far from the current ASF packet
136 uint16_t mult_sub_len; // total length of subpayloads array inside multiple payload
137 uint64_t nb_mult_left; // multiple payloads left
138 int return_subpayload;
147 static int detect_unknown_subobject(AVFormatContext *s, int64_t offset, int64_t size);
148 static const GUIDParseTable *find_guid(ff_asf_guid guid);
150 static int asf_probe(AVProbeData *pd)
152 /* check file header */
153 if (!ff_guidcmp(pd->buf, &ff_asf_header))
154 return AVPROBE_SCORE_MAX/2;
159 static void swap_guid(ff_asf_guid guid)
161 FFSWAP(unsigned char, guid[0], guid[3]);
162 FFSWAP(unsigned char, guid[1], guid[2]);
163 FFSWAP(unsigned char, guid[4], guid[5]);
164 FFSWAP(unsigned char, guid[6], guid[7]);
167 static void align_position(AVIOContext *pb, int64_t offset, uint64_t size)
169 if (size < INT64_MAX - offset && avio_tell(pb) != offset + size)
170 avio_seek(pb, offset + size, SEEK_SET);
173 static int asf_read_unknown(AVFormatContext *s, const GUIDParseTable *g)
175 ASFContext *asf = s->priv_data;
176 AVIOContext *pb = s->pb;
177 uint64_t size = avio_rl64(pb);
180 if (size > INT64_MAX)
181 return AVERROR_INVALIDDATA;
184 asf->unknown_size = size;
186 if (!g->is_subobject) {
187 if (!(ret = strcmp(g->name, "Header Extension")))
188 avio_skip(pb, 22); // skip reserved fields and Data Size
189 if ((ret = detect_unknown_subobject(s, asf->unknown_offset,
190 asf->unknown_size)) < 0)
194 av_log(s, AV_LOG_ERROR, "Too small size %"PRIu64" (< 24).\n", size);
195 return AVERROR_INVALIDDATA;
197 avio_skip(pb, size - 24);
203 static int get_asf_string(AVIOContext *pb, int maxlen, char *buf, int buflen)
208 return AVERROR(EINVAL);
209 while (ret + 1 < maxlen) {
212 GET_UTF16(ch, (ret += 2) <= maxlen ? avio_rl16(pb) : 0, break;);
213 PUT_UTF8(ch, tmp, if (q - buf < buflen - 1) *q++ = tmp;)
220 static int asf_read_marker(AVFormatContext *s, const GUIDParseTable *g)
222 ASFContext *asf = s->priv_data;
223 AVIOContext *pb = s->pb;
224 uint64_t size = avio_rl64(pb);
225 int i, nb_markers, ret;
230 avio_skip(pb, 8); // skip reserved GUID
231 nb_markers = avio_rl32(pb);
232 avio_skip(pb, 2); // skip reserved field
234 for (i = 0; i < len; i++)
237 for (i = 0; i < nb_markers; i++) {
242 pts -= asf->preroll * 10000;
243 avio_skip(pb, 2); // entry length
244 avio_skip(pb, 4); // send time
245 avio_skip(pb, 4); // flags
248 if ((ret = avio_get_str16le(pb, len, name,
249 sizeof(name))) < len)
250 avio_skip(pb, len - ret);
251 avpriv_new_chapter(s, i, (AVRational) { 1, 10000000 }, pts,
252 AV_NOPTS_VALUE, name);
254 align_position(pb, asf->offset, size);
259 static int asf_read_metadata(AVFormatContext *s, const char *title, uint16_t len,
260 unsigned char *ch, uint16_t buflen)
262 AVIOContext *pb = s->pb;
264 avio_get_str16le(pb, len, ch, buflen);
266 if (av_dict_set(&s->metadata, title, ch, 0) < 0)
267 av_log(s, AV_LOG_WARNING, "av_dict_set failed.\n");
273 static int asf_read_value(AVFormatContext *s, const uint8_t *name,
274 uint16_t val_len, int type, AVDictionary **met)
278 uint16_t buflen = 2 * val_len + 1;
279 AVIOContext *pb = s->pb;
281 value = av_malloc(buflen);
283 return AVERROR(ENOMEM);
284 if (type == ASF_UNICODE) {
285 // get_asf_string reads UTF-16 and converts it to UTF-8 which needs longer buffer
286 if ((ret = get_asf_string(pb, val_len, value, buflen)) < 0)
288 if (av_dict_set(met, name, value, 0) < 0)
289 av_log(s, AV_LOG_WARNING, "av_dict_set failed.\n");
292 if (val_len > sizeof(buf)) {
293 ret = AVERROR_INVALIDDATA;
296 if ((ret = avio_read(pb, value, val_len)) < 0)
298 if (ret < 2 * val_len)
301 value[2 * val_len - 1] = '\0';
302 snprintf(buf, sizeof(buf), "%s", value);
303 if (av_dict_set(met, name, buf, 0) < 0)
304 av_log(s, AV_LOG_WARNING, "av_dict_set failed.\n");
314 static int asf_read_generic_value(AVIOContext *pb, int type, uint64_t *value)
319 *value = avio_rl16(pb);
322 *value = avio_rl32(pb);
325 *value = avio_rl64(pb);
328 *value = avio_rl16(pb);
331 return AVERROR_INVALIDDATA;
337 static int asf_set_metadata(AVFormatContext *s, const uint8_t *name,
338 int type, AVDictionary **met)
340 AVIOContext *pb = s->pb;
345 ret = asf_read_generic_value(pb, type, &value);
349 snprintf(buf, sizeof(buf), "%"PRIu64, value);
350 if (av_dict_set(met, name, buf, 0) < 0)
351 av_log(s, AV_LOG_WARNING, "av_dict_set failed.\n");
356 /* MSDN claims that this should be "compatible with the ID3 frame, APIC",
357 * but in reality this is only loosely similar */
358 static int asf_read_picture(AVFormatContext *s, int len)
360 ASFContext *asf = s->priv_data;
361 AVPacket pkt = { 0 };
362 const CodecMime *mime = ff_id3v2_mime_tags;
363 enum AVCodecID id = AV_CODEC_ID_NONE;
365 uint8_t *desc = NULL;
367 int ret, type, picsize, desc_len;
370 /* type + picsize + mime + desc */
371 if (len < 1 + 4 + 2 + 2) {
372 av_log(s, AV_LOG_ERROR, "Invalid attached picture size: %d.\n", len);
373 return AVERROR_INVALIDDATA;
377 type = avio_r8(s->pb);
379 if (type >= FF_ARRAY_ELEMS(ff_id3v2_picture_types) || type < 0) {
380 av_log(s, AV_LOG_WARNING, "Unknown attached picture type: %d.\n", type);
384 /* picture data size */
385 picsize = avio_rl32(s->pb);
388 /* picture MIME type */
389 len -= avio_get_str16le(s->pb, len, mimetype, sizeof(mimetype));
390 while (mime->id != AV_CODEC_ID_NONE) {
391 if (!strncmp(mime->str, mimetype, sizeof(mimetype))) {
397 if (id == AV_CODEC_ID_NONE) {
398 av_log(s, AV_LOG_ERROR, "Unknown attached picture mimetype: %s.\n",
403 if (picsize >= len) {
404 av_log(s, AV_LOG_ERROR, "Invalid attached picture data size: %d >= %d.\n",
406 return AVERROR_INVALIDDATA;
409 /* picture description */
410 desc_len = (len - picsize) * 2 + 1;
411 desc = av_malloc(desc_len);
413 return AVERROR(ENOMEM);
414 len -= avio_get_str16le(s->pb, len - picsize, desc, desc_len);
416 ret = av_get_packet(s->pb, &pkt, picsize);
420 st = avformat_new_stream(s, NULL);
422 ret = AVERROR(ENOMEM);
425 asf->asf_st[asf->nb_streams] = av_mallocz(sizeof(*asf_st));
426 asf_st = asf->asf_st[asf->nb_streams];
428 ret = AVERROR(ENOMEM);
432 st->disposition |= AV_DISPOSITION_ATTACHED_PIC;
433 st->codecpar->codec_type = asf_st->type = AVMEDIA_TYPE_VIDEO;
434 st->codecpar->codec_id = id;
435 st->attached_pic = pkt;
436 st->attached_pic.stream_index = asf_st->index = st->index;
437 st->attached_pic.flags |= AV_PKT_FLAG_KEY;
442 if (av_dict_set(&st->metadata, "title", desc, AV_DICT_DONT_STRDUP_VAL) < 0)
443 av_log(s, AV_LOG_WARNING, "av_dict_set failed.\n");
447 if (av_dict_set(&st->metadata, "comment", ff_id3v2_picture_types[type], 0) < 0)
448 av_log(s, AV_LOG_WARNING, "av_dict_set failed.\n");
454 av_packet_unref(&pkt);
458 static void get_id3_tag(AVFormatContext *s, int len)
460 ID3v2ExtraMeta *id3v2_extra_meta = NULL;
462 ff_id3v2_read(s, ID3v2_DEFAULT_MAGIC, &id3v2_extra_meta, len);
463 if (id3v2_extra_meta) {
464 ff_id3v2_parse_apic(s, &id3v2_extra_meta);
465 ff_id3v2_parse_chapters(s, &id3v2_extra_meta);
467 ff_id3v2_free_extra_meta(&id3v2_extra_meta);
470 static int process_metadata(AVFormatContext *s, const uint8_t *name, uint16_t name_len,
471 uint16_t val_len, uint16_t type, AVDictionary **met)
479 asf_read_value(s, name, val_len, type, met);
482 if (!strcmp(name, "WM/Picture")) // handle cover art
483 asf_read_picture(s, val_len);
484 else if (!strcmp(name, "ID3")) // handle ID3 tag
485 get_id3_tag(s, val_len);
487 asf_read_value(s, name, val_len, type, met);
490 ff_get_guid(s->pb, &guid);
493 if ((ret = asf_set_metadata(s, name, type, met)) < 0)
502 static int asf_read_ext_content(AVFormatContext *s, const GUIDParseTable *g)
504 ASFContext *asf = s->priv_data;
505 AVIOContext *pb = s->pb;
506 uint64_t size = avio_rl64(pb);
507 uint16_t nb_desc = avio_rl16(pb);
510 for (i = 0; i < nb_desc; i++) {
511 uint16_t name_len, type, val_len;
512 uint8_t *name = NULL;
514 name_len = avio_rl16(pb);
516 return AVERROR_INVALIDDATA;
517 name = av_malloc(name_len);
519 return AVERROR(ENOMEM);
520 avio_get_str16le(pb, name_len, name,
522 type = avio_rl16(pb);
523 // BOOL values are 16 bits long in the Metadata Object
524 // but 32 bits long in the Extended Content Description Object
525 if (type == ASF_BOOL)
527 val_len = avio_rl16(pb);
529 ret = process_metadata(s, name, name_len, val_len, type, &s->metadata);
535 align_position(pb, asf->offset, size);
539 static AVStream *find_stream(AVFormatContext *s, uint16_t st_num)
542 ASFContext *asf = s->priv_data;
545 for (i = 0; i < asf->nb_streams; i++) {
546 if (asf->asf_st[i]->stream_index == st_num) {
547 st = s->streams[asf->asf_st[i]->index];
555 static int asf_store_aspect_ratio(AVFormatContext *s, uint8_t st_num, uint8_t *name, int type)
557 ASFContext *asf = s->priv_data;
558 AVIOContext *pb = s->pb;
562 ret = asf_read_generic_value(pb, type, &value);
566 if (st_num < ASF_MAX_STREAMS) {
567 if (!strcmp(name, "AspectRatioX"))
568 asf->asf_sd[st_num].aspect_ratio.num = value;
570 asf->asf_sd[st_num].aspect_ratio.den = value;
575 static int asf_read_metadata_obj(AVFormatContext *s, const GUIDParseTable *g)
577 ASFContext *asf = s->priv_data;
578 AVIOContext *pb = s->pb;
579 uint64_t size = avio_rl64(pb);
580 uint16_t nb_recs = avio_rl16(pb); // number of records in the Description Records list
583 for (i = 0; i < nb_recs; i++) {
584 uint16_t name_len, buflen, type, val_len, st_num;
585 uint8_t *name = NULL;
587 avio_skip(pb, 2); // skip reserved field
588 st_num = avio_rl16(pb);
589 name_len = avio_rl16(pb);
590 buflen = 2 * name_len + 1;
593 type = avio_rl16(pb);
594 val_len = avio_rl32(pb);
595 name = av_malloc(buflen);
597 return AVERROR(ENOMEM);
598 avio_get_str16le(pb, name_len, name,
600 if (!strcmp(name, "AspectRatioX") || !strcmp(name, "AspectRatioY")) {
601 ret = asf_store_aspect_ratio(s, st_num, name, type);
607 if (st_num < ASF_MAX_STREAMS) {
608 if ((ret = process_metadata(s, name, name_len, val_len, type,
609 &asf->asf_sd[st_num].asf_met)) < 0) {
618 align_position(pb, asf->offset, size);
622 static int asf_read_content_desc(AVFormatContext *s, const GUIDParseTable *g)
624 ASFContext *asf = s->priv_data;
625 AVIOContext *pb = s->pb;
627 static const char *const titles[] =
628 { "Title", "Author", "Copyright", "Description", "Rate" };
629 uint16_t len[5], buflen[5] = { 0 };
631 uint64_t size = avio_rl64(pb);
633 for (i = 0; i < 5; i++) {
634 len[i] = avio_rl16(pb);
635 // utf8 string should be <= 2 * utf16 string, extra byte for the terminator
636 buflen[i] = 2 * len[i] + 1;
639 for (i = 0; i < 5; i++) {
640 ch = av_malloc(buflen[i]);
642 return(AVERROR(ENOMEM));
643 asf_read_metadata(s, titles[i], len[i], ch, buflen[i]);
646 align_position(pb, asf->offset, size);
651 static int asf_read_properties(AVFormatContext *s, const GUIDParseTable *g)
653 ASFContext *asf = s->priv_data;
654 AVIOContext *pb = s->pb;
655 time_t creation_time;
657 avio_rl64(pb); // read object size
658 avio_skip(pb, 16); // skip File ID
659 avio_skip(pb, 8); // skip File size
660 creation_time = avio_rl64(pb);
661 if (!(asf->b_flags & ASF_FLAG_BROADCAST)) {
666 // creation date is in 100 ns units from 1 Jan 1601, conversion to s
667 creation_time /= 10000000;
668 // there are 11644473600 seconds between 1 Jan 1601 and 1 Jan 1970
669 creation_time -= 11644473600;
670 tm = gmtime_r(&creation_time, &tmbuf);
672 if (!strftime(buf, sizeof(buf), "%Y-%m-%d %H:%M:%S", tm))
677 if (av_dict_set(&s->metadata, "creation_time", buf, 0) < 0)
678 av_log(s, AV_LOG_WARNING, "av_dict_set failed.\n");
681 asf->nb_packets = avio_rl64(pb);
682 asf->duration = avio_rl64(pb) / 10000; // stream duration
683 avio_skip(pb, 8); // skip send duration
684 asf->preroll = avio_rl64(pb);
685 asf->duration -= asf->preroll;
686 asf->b_flags = avio_rl32(pb);
687 avio_skip(pb, 4); // skip minimal packet size
688 asf->packet_size = avio_rl32(pb);
689 avio_skip(pb, 4); // skip max_bitrate
694 static int parse_video_info(AVIOContext *pb, AVStream *st)
696 uint16_t size_asf; // ASF-specific Format Data size
697 uint32_t size_bmp; // BMP_HEADER-specific Format Data size
700 st->codecpar->width = avio_rl32(pb);
701 st->codecpar->height = avio_rl32(pb);
702 avio_skip(pb, 1); // skip reserved flags
703 size_asf = avio_rl16(pb);
704 tag = ff_get_bmp_header(pb, st, &size_bmp);
705 st->codecpar->codec_tag = tag;
706 st->codecpar->codec_id = ff_codec_get_id(ff_codec_bmp_tags, tag);
707 size_bmp = FFMAX(size_asf, size_bmp);
709 if (size_bmp > BMP_HEADER_SIZE) {
711 st->codecpar->extradata_size = size_bmp - BMP_HEADER_SIZE;
712 if (!(st->codecpar->extradata = av_malloc(st->codecpar->extradata_size +
713 AV_INPUT_BUFFER_PADDING_SIZE))) {
714 st->codecpar->extradata_size = 0;
715 return AVERROR(ENOMEM);
717 memset(st->codecpar->extradata + st->codecpar->extradata_size , 0,
718 AV_INPUT_BUFFER_PADDING_SIZE);
719 if ((ret = avio_read(pb, st->codecpar->extradata,
720 st->codecpar->extradata_size)) < 0)
726 static int asf_read_stream_properties(AVFormatContext *s, const GUIDParseTable *g)
728 ASFContext *asf = s->priv_data;
729 AVIOContext *pb = s->pb;
731 uint32_t err_data_len, ts_data_len; // type specific data length
733 ff_asf_guid stream_type;
734 enum AVMediaType type;
736 uint8_t stream_index;
740 // ASF file must not contain more than 128 streams according to the specification
741 if (asf->nb_streams >= ASF_MAX_STREAMS)
742 return AVERROR_INVALIDDATA;
744 size = avio_rl64(pb);
745 ff_get_guid(pb, &stream_type);
746 if (!ff_guidcmp(&stream_type, &ff_asf_audio_stream))
747 type = AVMEDIA_TYPE_AUDIO;
748 else if (!ff_guidcmp(&stream_type, &ff_asf_video_stream))
749 type = AVMEDIA_TYPE_VIDEO;
750 else if (!ff_guidcmp(&stream_type, &ff_asf_jfif_media))
751 type = AVMEDIA_TYPE_VIDEO;
752 else if (!ff_guidcmp(&stream_type, &ff_asf_command_stream))
753 type = AVMEDIA_TYPE_DATA;
754 else if (!ff_guidcmp(&stream_type,
755 &ff_asf_ext_stream_embed_stream_header))
756 type = AVMEDIA_TYPE_UNKNOWN;
758 return AVERROR_INVALIDDATA;
760 ff_get_guid(pb, &stream_type); // error correction type
761 avio_skip(pb, 8); // skip the time offset
762 ts_data_len = avio_rl32(pb);
763 err_data_len = avio_rl32(pb);
764 flags = avio_rl16(pb); // bit 15 - Encrypted Content
766 stream_index = flags & ASF_STREAM_NUM;
767 for (i = 0; i < asf->nb_streams; i++)
768 if (stream_index == asf->asf_st[i]->stream_index) {
769 av_log(s, AV_LOG_WARNING,
770 "Duplicate stream found, this stream will be ignored.\n");
771 align_position(pb, asf->offset, size);
775 st = avformat_new_stream(s, NULL);
777 return AVERROR(ENOMEM);
778 avpriv_set_pts_info(st, 32, 1, 1000); // pts should be dword, in milliseconds
779 st->codecpar->codec_type = type;
780 asf->asf_st[asf->nb_streams] = av_mallocz(sizeof(*asf_st));
781 if (!asf->asf_st[asf->nb_streams])
782 return AVERROR(ENOMEM);
783 asf_st = asf->asf_st[asf->nb_streams];
785 asf_st->stream_index = stream_index;
786 asf_st->index = st->index;
788 st->id = flags & ASF_STREAM_NUM;
789 av_init_packet(&asf_st->pkt.avpkt);
790 asf_st->pkt.data_size = 0;
791 avio_skip(pb, 4); // skip reserved field
794 case AVMEDIA_TYPE_AUDIO:
795 asf_st->type = AVMEDIA_TYPE_AUDIO;
796 if ((ret = ff_get_wav_header(s, pb, st->codecpar, ts_data_len, 0)) < 0)
799 case AVMEDIA_TYPE_VIDEO:
800 asf_st->type = AVMEDIA_TYPE_VIDEO;
801 if ((ret = parse_video_info(pb, st)) < 0)
805 avio_skip(pb, ts_data_len);
810 if (type == AVMEDIA_TYPE_AUDIO) {
811 uint8_t span = avio_r8(pb);
814 asf_st->virtual_pkt_len = avio_rl16(pb);
815 asf_st->virtual_chunk_len = avio_rl16(pb);
816 if (!asf_st->virtual_chunk_len || !asf_st->virtual_pkt_len)
817 return AVERROR_INVALIDDATA;
818 avio_skip(pb, err_data_len - 5);
820 avio_skip(pb, err_data_len - 1);
822 avio_skip(pb, err_data_len);
825 align_position(pb, asf->offset, size);
830 static void set_language(AVFormatContext *s, const char *rfc1766, AVDictionary **met)
832 // language abbr should contain at least 2 chars
833 if (rfc1766 && strlen(rfc1766) > 1) {
834 const char primary_tag[3] = { rfc1766[0], rfc1766[1], '\0' }; // ignore country code if any
835 const char *iso6392 = ff_convert_lang_to(primary_tag,
836 AV_LANG_ISO639_2_BIBL);
838 if (av_dict_set(met, "language", iso6392, 0) < 0)
839 av_log(s, AV_LOG_WARNING, "av_dict_set failed.\n");
843 static int asf_read_ext_stream_properties(AVFormatContext *s, const GUIDParseTable *g)
845 ASFContext *asf = s->priv_data;
846 AVIOContext *pb = s->pb;
849 uint16_t nb_st_name, nb_pay_exts, st_num, lang_idx;
852 uint64_t start_time, end_time, time_per_frame;
853 uint64_t size = avio_rl64(pb);
855 start_time = avio_rl64(pb);
856 end_time = avio_rl64(pb);
857 bitrate = avio_rl32(pb);
858 avio_skip(pb, 28); // skip some unused values
859 st_num = avio_rl16(pb);
860 st_num &= ASF_STREAM_NUM;
861 lang_idx = avio_rl16(pb); // Stream Language ID Index
862 for (i = 0; i < asf->nb_streams; i++) {
863 if (st_num == asf->asf_st[i]->stream_index) {
864 st = s->streams[asf->asf_st[i]->index];
865 asf->asf_st[i]->lang_idx = lang_idx;
869 time_per_frame = avio_rl64(pb); // average time per frame
871 st->start_time = start_time;
872 st->duration = end_time - start_time;
873 st->codecpar->bit_rate = bitrate;
874 st->avg_frame_rate.num = 10000000;
875 st->avg_frame_rate.den = time_per_frame;
877 nb_st_name = avio_rl16(pb);
878 nb_pay_exts = avio_rl16(pb);
879 for (i = 0; i < nb_st_name; i++) {
882 avio_rl16(pb); // Language ID Index
887 for (i = 0; i < nb_pay_exts; i++) {
889 avio_skip(pb, 16); // Extension System ID
890 avio_skip(pb, 2); // Extension Data Size
895 if ((ret = ff_get_guid(pb, &guid)) < 0) {
896 align_position(pb, asf->offset, size);
902 if (g && !(strcmp(g->name, "Stream Properties"))) {
903 if ((ret = g->read_object(s, g)) < 0)
907 align_position(pb, asf->offset, size);
911 static int asf_read_language_list(AVFormatContext *s, const GUIDParseTable *g)
913 ASFContext *asf = s->priv_data;
914 AVIOContext *pb = s->pb;
916 uint64_t size = avio_rl64(pb);
917 uint16_t nb_langs = avio_rl16(pb);
919 if (nb_langs < ASF_MAX_STREAMS) {
920 for (i = 0; i < nb_langs; i++) {
925 if ((ret = get_asf_string(pb, len, asf->asf_sd[i].langs,
926 sizeof(asf->asf_sd[i].langs))) < 0) {
932 align_position(pb, asf->offset, size);
936 // returns data object offset when reading this object for the first time
937 static int asf_read_data(AVFormatContext *s, const GUIDParseTable *g)
939 ASFContext *asf = s->priv_data;
940 AVIOContext *pb = s->pb;
941 uint64_t size = asf->data_size = avio_rl64(pb);
944 if (!asf->data_reached) {
945 asf->data_reached = 1;
946 asf->data_offset = asf->offset;
949 for (i = 0; i < asf->nb_streams; i++) {
950 if (!(asf->b_flags & ASF_FLAG_BROADCAST))
951 s->streams[i]->duration = asf->duration;
953 asf->nb_mult_left = 0;
955 asf->state = PARSE_PACKET_HEADER;
956 asf->return_subpayload = 0;
957 asf->packet_size_internal = 0;
958 avio_skip(pb, 16); // skip File ID
959 size = avio_rl64(pb); // Total Data Packets
960 if (size != asf->nb_packets)
961 av_log(s, AV_LOG_WARNING,
962 "Number of Packets from File Properties Object is not equal to Total"
963 "Datapackets value! num of packets %"PRIu64" total num %"PRIu64".\n",
964 size, asf->nb_packets);
965 avio_skip(pb, 2); // skip reserved field
966 asf->first_packet_offset = avio_tell(pb);
967 if ((pb->seekable & AVIO_SEEKABLE_NORMAL) && !(asf->b_flags & ASF_FLAG_BROADCAST))
968 align_position(pb, asf->offset, asf->data_size);
973 static int asf_read_simple_index(AVFormatContext *s, const GUIDParseTable *g)
975 ASFContext *asf = s->priv_data;
976 AVIOContext *pb = s->pb;
978 uint64_t interval; // index entry time interval in 100 ns units, usually it's 1s
979 uint32_t pkt_num, nb_entries;
980 int32_t prev_pkt_num = -1;
983 uint64_t size = avio_rl64(pb);
985 // simple index objects should be ordered by stream number, this loop tries to find
986 // the first not indexed video stream
987 for (i = 0; i < asf->nb_streams; i++) {
988 if ((asf->asf_st[i]->type == AVMEDIA_TYPE_VIDEO) && !asf->asf_st[i]->indexed) {
989 asf->asf_st[i]->indexed = 1;
990 st = s->streams[asf->asf_st[i]->index];
995 avio_skip(pb, size - 24); // if there's no video stream, skip index object
998 avio_skip(pb, 16); // skip File ID
999 interval = avio_rl64(pb);
1001 nb_entries = avio_rl32(pb);
1002 for (i = 0; i < nb_entries; i++) {
1003 pkt_num = avio_rl32(pb);
1004 offset = avio_skip(pb, 2);
1006 av_log(s, AV_LOG_ERROR, "Skipping failed in asf_read_simple_index.\n");
1009 if (prev_pkt_num != pkt_num) {
1010 av_add_index_entry(st, asf->first_packet_offset + asf->packet_size *
1011 pkt_num, av_rescale(interval, i, 10000),
1012 asf->packet_size, 0, AVINDEX_KEYFRAME);
1013 prev_pkt_num = pkt_num;
1016 asf->is_simple_index = 1;
1017 align_position(pb, asf->offset, size);
1022 static const GUIDParseTable gdef[] = {
1023 { "Data", { 0x75, 0xB2, 0x26, 0x36, 0x66, 0x8E, 0x11, 0xCF, 0xA6, 0xD9, 0x00, 0xAA, 0x00, 0x62, 0xCE, 0x6C }, asf_read_data, 1 },
1024 { "Simple Index", { 0x33, 0x00, 0x08, 0x90, 0xE5, 0xB1, 0x11, 0xCF, 0x89, 0xF4, 0x00, 0xA0, 0xC9, 0x03, 0x49, 0xCB }, asf_read_simple_index, 1 },
1025 { "Content Description", { 0x75, 0xB2, 0x26, 0x33, 0x66 ,0x8E, 0x11, 0xCF, 0xA6, 0xD9, 0x00, 0xAA, 0x00, 0x62, 0xCE, 0x6C }, asf_read_content_desc, 1 },
1026 { "Extended Content Description", { 0xD2, 0xD0, 0xA4, 0x40, 0xE3, 0x07, 0x11, 0xD2, 0x97, 0xF0, 0x00, 0xA0, 0xC9, 0x5e, 0xA8, 0x50 }, asf_read_ext_content, 1 },
1027 { "Stream Bitrate Properties", { 0x7B, 0xF8, 0x75, 0xCE, 0x46, 0x8D, 0x11, 0xD1, 0x8D, 0x82, 0x00, 0x60, 0x97, 0xC9, 0xA2, 0xB2 }, asf_read_unknown, 1 },
1028 { "File Properties", { 0x8C, 0xAB, 0xDC, 0xA1, 0xA9, 0x47, 0x11, 0xCF, 0x8E, 0xE4, 0x00, 0xC0, 0x0C, 0x20, 0x53, 0x65 }, asf_read_properties, 1 },
1029 { "Header Extension", { 0x5F, 0xBF, 0x03, 0xB5, 0xA9, 0x2E, 0x11, 0xCF, 0x8E, 0xE3, 0x00, 0xC0, 0x0C, 0x20, 0x53, 0x65 }, asf_read_unknown, 0 },
1030 { "Stream Properties", { 0xB7, 0xDC, 0x07, 0x91, 0xA9, 0xB7, 0x11, 0xCF, 0x8E, 0xE6, 0x00, 0xC0, 0x0C, 0x20, 0x53, 0x65 }, asf_read_stream_properties, 1 },
1031 { "Codec List", { 0x86, 0xD1, 0x52, 0x40, 0x31, 0x1D, 0x11, 0xD0, 0xA3, 0xA4, 0x00, 0xA0, 0xC9, 0x03, 0x48, 0xF6 }, asf_read_unknown, 1 },
1032 { "Marker", { 0xF4, 0x87, 0xCD, 0x01, 0xA9, 0x51, 0x11, 0xCF, 0x8E, 0xE6, 0x00, 0xC0, 0x0C, 0x20, 0x53, 0x65 }, asf_read_marker, 1 },
1033 { "Script Command", { 0x1E, 0xFB, 0x1A, 0x30, 0x0B, 0x62, 0x11, 0xD0, 0xA3, 0x9B, 0x00, 0xA0, 0xC9, 0x03, 0x48, 0xF6 }, asf_read_unknown, 1 },
1034 { "Language List", { 0x7C, 0x43, 0x46, 0xa9, 0xef, 0xe0, 0x4B, 0xFC, 0xB2, 0x29, 0x39, 0x3e, 0xde, 0x41, 0x5c, 0x85 }, asf_read_language_list, 1},
1035 { "Padding", { 0x18, 0x06, 0xD4, 0x74, 0xCA, 0xDF, 0x45, 0x09, 0xA4, 0xBA, 0x9A, 0xAB, 0xCB, 0x96, 0xAA, 0xE8 }, asf_read_unknown, 1 },
1036 { "DRMv1 Header", { 0x22, 0x11, 0xB3, 0xFB, 0xBD, 0x23, 0x11, 0xD2, 0xB4, 0xB7, 0x00, 0xA0, 0xC9, 0x55, 0xFC, 0x6E }, asf_read_unknown, 1 },
1037 { "DRMv2 Header", { 0x29, 0x8A, 0xE6, 0x14, 0x26, 0x22, 0x4C, 0x17, 0xB9, 0x35, 0xDA, 0xE0, 0x7E, 0xE9, 0x28, 0x9c }, asf_read_unknown, 1 },
1038 { "Index", { 0xD6, 0xE2, 0x29, 0xD3, 0x35, 0xDA, 0x11, 0xD1, 0x90, 0x34, 0x00, 0xA0, 0xC9, 0x03, 0x49, 0xBE }, asf_read_unknown, 1 },
1039 { "Media Object Index", { 0xFE, 0xB1, 0x03, 0xF8, 0x12, 0xAD, 0x4C, 0x64, 0x84, 0x0F, 0x2A, 0x1D, 0x2F, 0x7A, 0xD4, 0x8C }, asf_read_unknown, 1 },
1040 { "Timecode Index", { 0x3C, 0xB7, 0x3F, 0xD0, 0x0C, 0x4A, 0x48, 0x03, 0x95, 0x3D, 0xED, 0xF7, 0xB6, 0x22, 0x8F, 0x0C }, asf_read_unknown, 0 },
1041 { "Bitrate_Mutual_Exclusion", { 0xD6, 0xE2, 0x29, 0xDC, 0x35, 0xDA, 0x11, 0xD1, 0x90, 0x34, 0x00, 0xA0, 0xC9, 0x03, 0x49, 0xBE }, asf_read_unknown, 1 },
1042 { "Error Correction", { 0x75, 0xB2, 0x26, 0x35, 0x66, 0x8E, 0x11, 0xCF, 0xA6, 0xD9, 0x00, 0xAA, 0x00, 0x62, 0xCE, 0x6C }, asf_read_unknown, 1 },
1043 { "Content Branding", { 0x22, 0x11, 0xB3, 0xFA, 0xBD, 0x23, 0x11, 0xD2, 0xB4, 0xB7, 0x00, 0xA0, 0xC9, 0x55, 0xFC, 0x6E }, asf_read_unknown, 1 },
1044 { "Content Encryption", { 0x22, 0x11, 0xB3, 0xFB, 0xBD, 0x23, 0x11, 0xD2, 0xB4, 0xB7, 0x00, 0xA0, 0xC9, 0x55, 0xFC, 0x6E }, asf_read_unknown, 1 },
1045 { "Extended Content Encryption", { 0x29, 0x8A, 0xE6, 0x14, 0x26, 0x22, 0x4C, 0x17, 0xB9, 0x35, 0xDA, 0xE0, 0x7E, 0xE9, 0x28, 0x9C }, asf_read_unknown, 1 },
1046 { "Digital Signature", { 0x22, 0x11, 0xB3, 0xFC, 0xBD, 0x23, 0x11, 0xD2, 0xB4, 0xB7, 0x00, 0xA0, 0xC9, 0x55, 0xFC, 0x6E }, asf_read_unknown, 1 },
1047 { "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 },
1048 { "Advanced Mutual Exclusion", { 0xA0, 0x86, 0x49, 0xCF, 0x47, 0x75, 0x46, 0x70, 0x8A, 0x16, 0x6E, 0x35, 0x35, 0x75, 0x66, 0xCD }, asf_read_unknown, 1 },
1049 { "Group Mutual Exclusion", { 0xD1, 0x46, 0x5A, 0x40, 0x5A, 0x79, 0x43, 0x38, 0xB7, 0x1B, 0xE3, 0x6B, 0x8F, 0xD6, 0xC2, 0x49 }, asf_read_unknown, 1},
1050 { "Stream Prioritization", { 0xD4, 0xFE, 0xD1, 0x5B, 0x88, 0xD3, 0x45, 0x4F, 0x81, 0xF0, 0xED, 0x5C, 0x45, 0x99, 0x9E, 0x24 }, asf_read_unknown, 1 },
1051 { "Bandwidth Sharing Object", { 0xA6, 0x96, 0x09, 0xE6, 0x51, 0x7B, 0x11, 0xD2, 0xB6, 0xAF, 0x00, 0xC0, 0x4F, 0xD9, 0x08, 0xE9 }, asf_read_unknown, 1 },
1052 { "Metadata", { 0xC5, 0xF8, 0xCB, 0xEA, 0x5B, 0xAF, 0x48, 0x77, 0x84, 0x67, 0xAA, 0x8C, 0x44, 0xFA, 0x4C, 0xCA }, asf_read_metadata_obj, 1 },
1053 { "Metadata Library", { 0x44, 0x23, 0x1C, 0x94, 0x94, 0x98, 0x49, 0xD1, 0xA1, 0x41, 0x1D, 0x13, 0x4E, 0x45, 0x70, 0x54 }, asf_read_metadata_obj, 1 },
1054 { "Audio Spread", { 0xBF, 0xC3, 0xCD, 0x50, 0x61, 0x8F, 0x11, 0xCF, 0x8B, 0xB2, 0x00, 0xAA, 0x00, 0xB4, 0xE2, 0x20 }, asf_read_unknown, 1 },
1055 { "Index Parameters", { 0xD6, 0xE2, 0x29, 0xDF, 0x35, 0xDA, 0x11, 0xD1, 0x90, 0x34, 0x00, 0xA0, 0xC9, 0x03, 0x49, 0xBE }, asf_read_unknown, 1 },
1056 { "Content Encryption System Windows Media DRM Network Devices",
1057 { 0x7A, 0x07, 0x9B, 0xB6, 0xDA, 0XA4, 0x4e, 0x12, 0xA5, 0xCA, 0x91, 0xD3, 0x8D, 0xC1, 0x1A, 0x8D }, asf_read_unknown, 1 },
1058 { "Mutex Language", { 0xD6, 0xE2, 0x2A, 0x00, 0x25, 0xDA, 0x11, 0xD1, 0x90, 0x34, 0x00, 0xA0, 0xC9, 0x03, 0x49, 0xBE }, asf_read_unknown, 1 },
1059 { "Mutex Bitrate", { 0xD6, 0xE2, 0x2A, 0x01, 0x25, 0xDA, 0x11, 0xD1, 0x90, 0x34, 0x00, 0xA0, 0xC9, 0x03, 0x49, 0xBE }, asf_read_unknown, 1 },
1060 { "Mutex Unknown", { 0xD6, 0xE2, 0x2A, 0x02, 0x25, 0xDA, 0x11, 0xD1, 0x90, 0x34, 0x00, 0xA0, 0xC9, 0x03, 0x49, 0xBE }, asf_read_unknown, 1 },
1061 { "Bandwidth Sharing Exclusive", { 0xAF, 0x60, 0x60, 0xAA, 0x51, 0x97, 0x11, 0xD2, 0xB6, 0xAF, 0x00, 0xC0, 0x4F, 0xD9, 0x08, 0xE9 }, asf_read_unknown, 1 },
1062 { "Bandwidth Sharing Partial", { 0xAF, 0x60, 0x60, 0xAB, 0x51, 0x97, 0x11, 0xD2, 0xB6, 0xAF, 0x00, 0xC0, 0x4F, 0xD9, 0x08, 0xE9 }, asf_read_unknown, 1 },
1063 { "Payload Extension System Timecode", { 0x39, 0x95, 0x95, 0xEC, 0x86, 0x67, 0x4E, 0x2D, 0x8F, 0xDB, 0x98, 0x81, 0x4C, 0xE7, 0x6C, 0x1E }, asf_read_unknown, 1 },
1064 { "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 },
1065 { "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 },
1066 { "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 },
1067 { "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 },
1068 { "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 },
1069 { "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 },
1072 #define READ_LEN(flag, name, len) \
1074 if ((flag) == name ## IS_BYTE) \
1075 len = avio_r8(pb); \
1076 else if ((flag) == name ## IS_WORD) \
1077 len = avio_rl16(pb); \
1078 else if ((flag) == name ## IS_DWORD) \
1079 len = avio_rl32(pb); \
1084 static int asf_read_subpayload(AVFormatContext *s, AVPacket *pkt, int is_header)
1086 ASFContext *asf = s->priv_data;
1087 AVIOContext *pb = s->pb;
1092 asf->dts_delta = avio_r8(pb);
1093 if (asf->nb_mult_left) {
1094 asf->mult_sub_len = avio_rl16(pb); // total
1096 asf->sub_header_offset = avio_tell(pb);
1100 sub_len = avio_r8(pb);
1101 if ((ret = av_get_packet(pb, pkt, sub_len)) < 0) // each subpayload is entire frame
1103 for (i = 0; i < asf->nb_streams; i++) {
1104 if (asf->stream_index == asf->asf_st[i]->stream_index) {
1105 pkt->stream_index = asf->asf_st[i]->index;
1109 asf->return_subpayload = 1;
1111 asf->return_subpayload = 0;
1115 pkt->dts = asf->sub_dts + (asf->nb_sub - 1) * asf->dts_delta - asf->preroll;
1116 if (asf->nb_mult_left && (avio_tell(pb) >=
1117 (asf->sub_header_offset + asf->mult_sub_len))) {
1119 asf->nb_mult_left--;
1121 if (avio_tell(pb) >= asf->packet_offset + asf->packet_size - asf->pad_len) {
1123 if (!asf->nb_mult_left) {
1124 avio_skip(pb, asf->pad_len);
1125 if (avio_tell(pb) != asf->packet_offset + asf->packet_size) {
1126 if (!asf->packet_size)
1127 return AVERROR_INVALIDDATA;
1128 av_log(s, AV_LOG_WARNING,
1129 "Position %"PRId64" wrong, should be %"PRId64"\n",
1130 avio_tell(pb), asf->packet_offset + asf->packet_size);
1131 avio_seek(pb, asf->packet_offset + asf->packet_size, SEEK_SET);
1139 static void reset_packet(ASFPacket *asf_pkt)
1141 asf_pkt->size_left = 0;
1142 asf_pkt->data_size = 0;
1143 asf_pkt->duration = 0;
1146 asf_pkt->duration = 0;
1147 av_packet_unref(&asf_pkt->avpkt);
1148 av_init_packet(&asf_pkt->avpkt);
1151 static int asf_read_replicated_data(AVFormatContext *s, ASFPacket *asf_pkt)
1153 ASFContext *asf = s->priv_data;
1154 AVIOContext *pb = s->pb;
1157 if (!asf_pkt->data_size) {
1158 data_size = avio_rl32(pb); // read media object size
1160 return AVERROR_INVALIDDATA;
1161 if ((ret = av_new_packet(&asf_pkt->avpkt, data_size)) < 0)
1163 asf_pkt->data_size = asf_pkt->size_left = data_size;
1165 avio_skip(pb, 4); // reading of media object size is already done
1166 asf_pkt->dts = avio_rl32(pb); // read presentation time
1167 if (asf->rep_data_len && (asf->rep_data_len >= 8))
1168 avio_skip(pb, asf->rep_data_len - 8); // skip replicated data
1173 static int asf_read_multiple_payload(AVFormatContext *s, AVPacket *pkt,
1176 ASFContext *asf = s->priv_data;
1177 AVIOContext *pb = s->pb;
1183 // if replicated length is 1, subpayloads are present
1184 if (asf->rep_data_len == 1) {
1186 asf->state = READ_MULTI_SUB;
1187 pkt->flags = asf_pkt->flags;
1188 if ((ret = asf_read_subpayload(s, pkt, 1)) < 0)
1191 if (asf->rep_data_len)
1192 if ((ret = asf_read_replicated_data(s, asf_pkt)) < 0)
1194 pay_len = avio_rl16(pb); // payload length should be WORD
1195 if (pay_len > asf->packet_size) {
1196 av_log(s, AV_LOG_ERROR,
1197 "Error: invalid data packet size, pay_len %"PRIu16", "
1198 "asf->packet_size %"PRIu32", offset %"PRId64".\n",
1199 pay_len, asf->packet_size, avio_tell(pb));
1200 return AVERROR_INVALIDDATA;
1202 p = asf_pkt->avpkt.data + asf_pkt->data_size - asf_pkt->size_left;
1203 if (pay_len > asf_pkt->size_left) {
1204 av_log(s, AV_LOG_ERROR,
1205 "Error: invalid buffer size, pay_len %d, data size left %d.\n",
1206 pay_len, asf_pkt->size_left);
1207 skip = pay_len - asf_pkt->size_left;
1208 pay_len = asf_pkt->size_left;
1210 if (asf_pkt->size_left <= 0)
1211 return AVERROR_INVALIDDATA;
1212 if ((ret = avio_read(pb, p, pay_len)) < 0)
1214 if (s->key && s->keylen == 20)
1215 ff_asfcrypt_dec(s->key, p, ret);
1216 avio_skip(pb, skip);
1217 asf_pkt->size_left -= pay_len;
1218 asf->nb_mult_left--;
1224 static int asf_read_single_payload(AVFormatContext *s, ASFPacket *asf_pkt)
1226 ASFContext *asf = s->priv_data;
1227 AVIOContext *pb = s->pb;
1233 if (!asf_pkt->data_size) {
1234 data_size = avio_rl32(pb); // read media object size
1237 if ((ret = av_new_packet(&asf_pkt->avpkt, data_size)) < 0)
1239 asf_pkt->data_size = asf_pkt->size_left = data_size;
1241 avio_skip(pb, 4); // skip media object size
1242 asf_pkt->dts = avio_rl32(pb); // read presentation time
1243 if (asf->rep_data_len >= 8)
1244 avio_skip(pb, asf->rep_data_len - 8); // skip replicated data
1245 offset = avio_tell(pb);
1247 // size of the payload - size of the packet without header and padding
1248 if (asf->packet_size_internal)
1249 size = asf->packet_size_internal - offset + asf->packet_offset - asf->pad_len;
1251 size = asf->packet_size - offset + asf->packet_offset - asf->pad_len;
1252 if (size > asf->packet_size) {
1253 av_log(s, AV_LOG_ERROR,
1254 "Error: invalid data packet size, offset %"PRId64".\n",
1256 return AVERROR_INVALIDDATA;
1258 p = asf_pkt->avpkt.data + asf_pkt->data_size - asf_pkt->size_left;
1259 if (size > asf_pkt->size_left || asf_pkt->size_left <= 0)
1260 return AVERROR_INVALIDDATA;
1261 if (asf_pkt->size_left > size)
1262 asf_pkt->size_left -= size;
1264 asf_pkt->size_left = 0;
1265 if ((ret = avio_read(pb, p, size)) < 0)
1267 if (s->key && s->keylen == 20)
1268 ff_asfcrypt_dec(s->key, p, ret);
1269 if (asf->packet_size_internal)
1270 avio_skip(pb, asf->packet_size - asf->packet_size_internal);
1271 avio_skip(pb, asf->pad_len); // skip padding
1276 static int asf_read_payload(AVFormatContext *s, AVPacket *pkt)
1278 ASFContext *asf = s->priv_data;
1279 AVIOContext *pb = s->pb;
1281 ASFPacket *asf_pkt = NULL;
1283 if (!asf->sub_left) {
1284 uint32_t off_len, media_len;
1287 stream_num = avio_r8(pb);
1288 asf->stream_index = stream_num & ASF_STREAM_NUM;
1289 for (i = 0; i < asf->nb_streams; i++) {
1290 if (asf->stream_index == asf->asf_st[i]->stream_index) {
1291 asf_pkt = &asf->asf_st[i]->pkt;
1292 asf_pkt->stream_index = asf->asf_st[i]->index;
1297 if (asf->packet_offset + asf->packet_size <= asf->data_offset + asf->data_size) {
1298 if (!asf->packet_size) {
1299 av_log(s, AV_LOG_ERROR, "Invalid packet size 0.\n");
1300 return AVERROR_INVALIDDATA;
1302 avio_seek(pb, asf->packet_offset + asf->packet_size, SEEK_SET);
1303 av_log(s, AV_LOG_WARNING, "Skipping the stream with the invalid stream index %d.\n",
1305 return AVERROR(EAGAIN);
1307 return AVERROR_INVALIDDATA;
1310 if (stream_num >> 7)
1311 asf_pkt->flags |= AV_PKT_FLAG_KEY;
1312 READ_LEN(asf->prop_flags & ASF_PL_MASK_MEDIA_OBJECT_NUMBER_LENGTH_FIELD_SIZE,
1313 ASF_PL_FLAG_MEDIA_OBJECT_NUMBER_LENGTH_FIELD_, media_len);
1314 READ_LEN(asf->prop_flags & ASF_PL_MASK_OFFSET_INTO_MEDIA_OBJECT_LENGTH_FIELD_SIZE,
1315 ASF_PL_FLAG_OFFSET_INTO_MEDIA_OBJECT_LENGTH_FIELD_, off_len);
1316 READ_LEN(asf->prop_flags & ASF_PL_MASK_REPLICATED_DATA_LENGTH_FIELD_SIZE,
1317 ASF_PL_FLAG_REPLICATED_DATA_LENGTH_FIELD_, asf->rep_data_len);
1318 if (asf_pkt->size_left && (asf_pkt->frame_num != media_len)) {
1319 av_log(s, AV_LOG_WARNING, "Unfinished frame will be ignored\n");
1320 reset_packet(asf_pkt);
1322 asf_pkt->frame_num = media_len;
1323 asf->sub_dts = off_len;
1324 if (asf->nb_mult_left) {
1325 if ((ret = asf_read_multiple_payload(s, pkt, asf_pkt)) < 0)
1327 } else if (asf->rep_data_len == 1) {
1329 asf->state = READ_SINGLE;
1330 pkt->flags = asf_pkt->flags;
1331 if ((ret = asf_read_subpayload(s, pkt, 1)) < 0)
1334 if ((ret = asf_read_single_payload(s, asf_pkt)) < 0)
1338 for (i = 0; i <= asf->nb_streams; i++) {
1339 if (asf->stream_index == asf->asf_st[i]->stream_index) {
1340 asf_pkt = &asf->asf_st[i]->pkt;
1345 return AVERROR_INVALIDDATA;
1346 pkt->flags = asf_pkt->flags;
1347 pkt->dts = asf_pkt->dts;
1348 pkt->stream_index = asf->asf_st[i]->index;
1349 if ((ret = asf_read_subpayload(s, pkt, 0)) < 0) // read subpayload without its header
1356 static int asf_read_packet_header(AVFormatContext *s)
1358 ASFContext *asf = s->priv_data;
1359 AVIOContext *pb = s->pb;
1361 uint32_t av_unused seq;
1362 unsigned char error_flags, len_flags, pay_flags;
1364 asf->packet_offset = avio_tell(pb);
1365 error_flags = avio_r8(pb); // read Error Correction Flags
1366 if (error_flags & ASF_PACKET_FLAG_ERROR_CORRECTION_PRESENT) {
1367 if (!(error_flags & ASF_ERROR_CORRECTION_LENGTH_TYPE)) {
1368 size = error_flags & ASF_PACKET_ERROR_CORRECTION_DATA_SIZE;
1369 avio_skip(pb, size);
1371 len_flags = avio_r8(pb);
1373 len_flags = error_flags;
1374 asf->prop_flags = avio_r8(pb);
1375 READ_LEN(len_flags & ASF_PPI_MASK_PACKET_LENGTH_FIELD_SIZE,
1376 ASF_PPI_FLAG_PACKET_LENGTH_FIELD_, asf->packet_size_internal);
1377 READ_LEN(len_flags & ASF_PPI_MASK_SEQUENCE_FIELD_SIZE,
1378 ASF_PPI_FLAG_SEQUENCE_FIELD_, seq);
1379 READ_LEN(len_flags & ASF_PPI_MASK_PADDING_LENGTH_FIELD_SIZE,
1380 ASF_PPI_FLAG_PADDING_LENGTH_FIELD_, asf->pad_len );
1381 asf->send_time = avio_rl32(pb); // send time
1382 avio_skip(pb, 2); // skip duration
1383 if (len_flags & ASF_PPI_FLAG_MULTIPLE_PAYLOADS_PRESENT) { // Multiple Payloads present
1384 pay_flags = avio_r8(pb);
1385 asf->nb_mult_left = (pay_flags & ASF_NUM_OF_PAYLOADS);
1391 static int asf_deinterleave(AVFormatContext *s, ASFPacket *asf_pkt, int st_num)
1393 ASFContext *asf = s->priv_data;
1394 ASFStream *asf_st = asf->asf_st[st_num];
1395 unsigned char *p = asf_pkt->avpkt.data;
1396 uint16_t pkt_len = asf->asf_st[st_num]->virtual_pkt_len;
1397 uint16_t chunk_len = asf->asf_st[st_num]->virtual_chunk_len;
1398 int nchunks = pkt_len / chunk_len;
1400 int pos = 0, j, l, ret;
1403 if ((ret = av_new_packet(&pkt, asf_pkt->data_size)) < 0)
1406 while (asf_pkt->data_size >= asf_st->span * pkt_len + pos) {
1407 if (pos >= asf_pkt->data_size) {
1410 for (l = 0; l < pkt_len; l++) {
1411 if (pos >= asf_pkt->data_size) {
1414 for (j = 0; j < asf_st->span; j++) {
1415 if ((pos + chunk_len) >= asf_pkt->data_size)
1417 memcpy(pkt.data + pos,
1418 p + (j * nchunks + l) * chunk_len,
1423 p += asf_st->span * pkt_len;
1424 if (p > asf_pkt->avpkt.data + asf_pkt->data_size)
1427 av_packet_unref(&asf_pkt->avpkt);
1428 asf_pkt->avpkt = pkt;
1433 static int asf_read_packet(AVFormatContext *s, AVPacket *pkt)
1435 ASFContext *asf = s->priv_data;
1436 AVIOContext *pb = s->pb;
1439 if ((avio_tell(pb) >= asf->data_offset + asf->data_size) &&
1440 !(asf->b_flags & ASF_FLAG_BROADCAST))
1442 while (!pb->eof_reached) {
1443 if (asf->state == PARSE_PACKET_HEADER) {
1444 asf_read_packet_header(s);
1445 if (pb->eof_reached)
1447 if (!asf->nb_mult_left)
1448 asf->state = READ_SINGLE;
1450 asf->state = READ_MULTI;
1452 ret = asf_read_payload(s, pkt);
1453 if (ret == AVERROR(EAGAIN)) {
1454 asf->state = PARSE_PACKET_HEADER;
1460 switch (asf->state) {
1463 asf->state = PARSE_PACKET_HEADER;
1465 case READ_MULTI_SUB:
1466 if (!asf->sub_left && !asf->nb_mult_left) {
1467 asf->state = PARSE_PACKET_HEADER;
1468 if (!asf->return_subpayload &&
1469 (avio_tell(pb) <= asf->packet_offset +
1470 asf->packet_size - asf->pad_len))
1471 avio_skip(pb, asf->pad_len); // skip padding
1472 if (asf->packet_offset + asf->packet_size > avio_tell(pb))
1473 avio_seek(pb, asf->packet_offset + asf->packet_size, SEEK_SET);
1474 } else if (!asf->sub_left)
1475 asf->state = READ_MULTI;
1478 if (!asf->nb_mult_left) {
1479 asf->state = PARSE_PACKET_HEADER;
1480 if (!asf->return_subpayload &&
1481 (avio_tell(pb) <= asf->packet_offset +
1482 asf->packet_size - asf->pad_len))
1483 avio_skip(pb, asf->pad_len); // skip padding
1484 if (asf->packet_offset + asf->packet_size > avio_tell(pb))
1485 avio_seek(pb, asf->packet_offset + asf->packet_size, SEEK_SET);
1489 if (asf->return_subpayload) {
1490 asf->return_subpayload = 0;
1493 for (i = 0; i < asf->nb_streams; i++) {
1494 ASFPacket *asf_pkt = &asf->asf_st[i]->pkt;
1495 if (asf_pkt && !asf_pkt->size_left && asf_pkt->data_size) {
1496 if (asf->asf_st[i]->span > 1 &&
1497 asf->asf_st[i]->type == AVMEDIA_TYPE_AUDIO)
1498 if ((ret = asf_deinterleave(s, asf_pkt, i)) < 0)
1500 av_packet_move_ref(pkt, &asf_pkt->avpkt);
1501 pkt->stream_index = asf->asf_st[i]->index;
1502 pkt->flags = asf_pkt->flags;
1503 pkt->dts = asf_pkt->dts - asf->preroll;
1504 asf_pkt->data_size = 0;
1505 asf_pkt->frame_num = 0;
1511 if (pb->eof_reached)
1517 static int asf_read_close(AVFormatContext *s)
1519 ASFContext *asf = s->priv_data;
1522 for (i = 0; i < ASF_MAX_STREAMS; i++) {
1523 av_dict_free(&asf->asf_sd[i].asf_met);
1524 if (i < asf->nb_streams) {
1525 av_packet_unref(&asf->asf_st[i]->pkt.avpkt);
1526 av_freep(&asf->asf_st[i]);
1530 asf->nb_streams = 0;
1534 static void reset_packet_state(AVFormatContext *s)
1536 ASFContext *asf = s->priv_data;
1539 asf->state = PARSE_PACKET_HEADER;
1541 asf->return_subpayload = 0;
1543 asf->sub_header_offset = 0;
1544 asf->packet_offset = asf->first_packet_offset;
1546 asf->rep_data_len = 0;
1548 asf->mult_sub_len = 0;
1549 asf->nb_mult_left = 0;
1551 asf->prop_flags = 0;
1553 for (i = 0; i < asf->nb_streams; i++) {
1554 ASFPacket *pkt = &asf->asf_st[i]->pkt;
1561 av_packet_unref(&pkt->avpkt);
1562 av_init_packet(&pkt->avpkt);
1567 * Find a timestamp for the requested position within the payload
1568 * where the pos (position) is the offset inside the Data Object.
1569 * When position is not on the packet boundary, asf_read_timestamp tries
1570 * to find the closest packet offset after this position. If this packet
1571 * is a key frame, this packet timestamp is read and an index entry is created
1572 * for the packet. If this packet belongs to the requested stream,
1573 * asf_read_timestamp upgrades pos to the packet beginning offset and
1574 * returns this packet's dts. So returned dts is the dts of the first key frame with
1575 * matching stream number after given position.
1577 static int64_t asf_read_timestamp(AVFormatContext *s, int stream_index,
1578 int64_t *pos, int64_t pos_limit)
1580 ASFContext *asf = s->priv_data;
1581 int64_t pkt_pos = *pos, pkt_offset, dts = AV_NOPTS_VALUE, data_end;
1585 data_end = asf->data_offset + asf->data_size;
1587 n = (pkt_pos - asf->first_packet_offset + asf->packet_size - 1) /
1589 n = av_clip(n, 0, ((data_end - asf->first_packet_offset) / asf->packet_size - 1));
1590 pkt_pos = asf->first_packet_offset + n * asf->packet_size;
1592 avio_seek(s->pb, pkt_pos, SEEK_SET);
1593 pkt_offset = pkt_pos;
1595 reset_packet_state(s);
1596 while (avio_tell(s->pb) < data_end) {
1598 int i, ret, st_found;
1600 av_init_packet(&pkt);
1601 pkt_offset = avio_tell(s->pb);
1602 if ((ret = asf_read_packet(s, &pkt)) < 0) {
1603 dts = AV_NOPTS_VALUE;
1606 // ASFPacket may contain fragments of packets belonging to different streams,
1607 // pkt_offset is the offset of the first fragment within it.
1608 if ((pkt_offset >= (pkt_pos + asf->packet_size)))
1609 pkt_pos += asf->packet_size;
1610 for (i = 0; i < asf->nb_streams; i++) {
1611 ASFStream *st = asf->asf_st[i];
1614 if (pkt.flags & AV_PKT_FLAG_KEY) {
1617 av_add_index_entry(s->streams[pkt.stream_index], pkt_pos,
1618 dts, pkt.size, 0, AVINDEX_KEYFRAME);
1619 if (stream_index == st->index) {
1628 av_packet_unref(&pkt);
1632 av_packet_unref(&pkt);
1636 static int asf_read_seek(AVFormatContext *s, int stream_index,
1637 int64_t timestamp, int flags)
1639 ASFContext *asf = s->priv_data;
1642 if (s->streams[stream_index]->nb_index_entries && asf->is_simple_index) {
1643 idx = av_index_search_timestamp(s->streams[stream_index], timestamp, flags);
1644 if (idx < 0 || idx >= s->streams[stream_index]->nb_index_entries)
1645 return AVERROR_INVALIDDATA;
1646 avio_seek(s->pb, s->streams[stream_index]->index_entries[idx].pos, SEEK_SET);
1648 if ((ret = ff_seek_frame_binary(s, stream_index, timestamp, flags)) < 0)
1652 reset_packet_state(s);
1657 static const GUIDParseTable *find_guid(ff_asf_guid guid)
1660 const GUIDParseTable *g;
1664 for (j = 0; j < FF_ARRAY_ELEMS(gdef); j++) {
1665 if (!(ret = memcmp(guid, g->guid, sizeof(g->guid))))
1673 static int detect_unknown_subobject(AVFormatContext *s, int64_t offset, int64_t size)
1675 ASFContext *asf = s->priv_data;
1676 AVIOContext *pb = s->pb;
1677 const GUIDParseTable *g = NULL;
1681 while (avio_tell(pb) <= offset + size) {
1682 if (avio_tell(pb) == asf->offset)
1684 asf->offset = avio_tell(pb);
1685 if ((ret = ff_get_guid(pb, &guid)) < 0)
1687 g = find_guid(guid);
1689 if ((ret = g->read_object(s, g)) < 0)
1694 g2.name = "Unknown";
1695 g2.is_subobject = 1;
1696 asf_read_unknown(s, &g2);
1703 static int asf_read_header(AVFormatContext *s)
1705 ASFContext *asf = s->priv_data;
1706 AVIOContext *pb = s->pb;
1707 const GUIDParseTable *g = NULL;
1713 asf->is_simple_index = 0;
1714 ff_get_guid(pb, &guid);
1715 if (ff_guidcmp(&guid, &ff_asf_header))
1716 return AVERROR_INVALIDDATA;
1717 avio_skip(pb, 8); // skip header object size
1718 avio_skip(pb, 6); // skip number of header objects and 2 reserved bytes
1719 asf->data_reached = 0;
1721 /* 1 is here instead of pb->eof_reached because (when not streaming), Data are skipped
1722 * for the first time,
1723 * Index object is processed and got eof and then seeking back to the Data is performed.
1726 // for the cases when object size is invalid
1727 if (avio_tell(pb) == asf->offset)
1729 asf->offset = avio_tell(pb);
1730 if ((ret = ff_get_guid(pb, &guid)) < 0) {
1731 if (ret == AVERROR_EOF && asf->data_reached)
1736 g = find_guid(guid);
1738 asf->unknown_offset = asf->offset;
1740 if ((ret = g->read_object(s, g)) < 0)
1743 size = avio_rl64(pb);
1744 align_position(pb, asf->offset, size);
1746 if (asf->data_reached &&
1747 (!(pb->seekable & AVIO_SEEKABLE_NORMAL) ||
1748 (asf->b_flags & ASF_FLAG_BROADCAST)))
1752 if (!asf->data_reached) {
1753 av_log(s, AV_LOG_ERROR, "Data Object was not found.\n");
1754 ret = AVERROR_INVALIDDATA;
1757 if (pb->seekable & AVIO_SEEKABLE_NORMAL)
1758 avio_seek(pb, asf->first_packet_offset, SEEK_SET);
1760 for (i = 0; i < asf->nb_streams; i++) {
1761 const char *rfc1766 = asf->asf_sd[asf->asf_st[i]->lang_idx].langs;
1762 AVStream *st = s->streams[asf->asf_st[i]->index];
1763 set_language(s, rfc1766, &st->metadata);
1766 for (i = 0; i < ASF_MAX_STREAMS; i++) {
1767 AVStream *st = NULL;
1769 st = find_stream(s, i);
1771 av_dict_copy(&st->metadata, asf->asf_sd[i].asf_met, AV_DICT_IGNORE_SUFFIX);
1772 if (asf->asf_sd[i].aspect_ratio.num > 0 && asf->asf_sd[i].aspect_ratio.den > 0) {
1773 st->sample_aspect_ratio.num = asf->asf_sd[i].aspect_ratio.num;
1774 st->sample_aspect_ratio.den = asf->asf_sd[i].aspect_ratio.den;
1786 AVInputFormat ff_asf_o_demuxer = {
1788 .long_name = NULL_IF_CONFIG_SMALL("ASF (Advanced / Active Streaming Format)"),
1789 .priv_data_size = sizeof(ASFContext),
1790 .read_probe = asf_probe,
1791 .read_header = asf_read_header,
1792 .read_packet = asf_read_packet,
1793 .read_close = asf_read_close,
1794 .read_timestamp = asf_read_timestamp,
1795 .read_seek = asf_read_seek,
1796 .flags = AVFMT_NOBINSEARCH | AVFMT_NOGENSEARCH,