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(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 size_bmp < INT_MAX - AV_INPUT_BUFFER_PADDING_SIZE) {
594 st->codecpar->extradata_size = size_bmp - BMP_HEADER_SIZE;
595 if (!(st->codecpar->extradata = av_malloc(st->codecpar->extradata_size +
596 AV_INPUT_BUFFER_PADDING_SIZE))) {
597 st->codecpar->extradata_size = 0;
598 return AVERROR(ENOMEM);
600 memset(st->codecpar->extradata + st->codecpar->extradata_size , 0,
601 AV_INPUT_BUFFER_PADDING_SIZE);
602 if ((ret = avio_read(pb, st->codecpar->extradata,
603 st->codecpar->extradata_size)) < 0)
609 static int asf_read_stream_properties(AVFormatContext *s, const GUIDParseTable *g)
611 ASFContext *asf = s->priv_data;
612 AVIOContext *pb = s->pb;
614 uint32_t err_data_len, ts_data_len; // type specific data length
616 ff_asf_guid stream_type;
617 enum AVMediaType type;
619 uint8_t stream_index;
623 // ASF file must not contain more than 128 streams according to the specification
624 if (asf->nb_streams >= ASF_MAX_STREAMS)
625 return AVERROR_INVALIDDATA;
627 size = avio_rl64(pb);
628 ff_get_guid(pb, &stream_type);
629 if (!ff_guidcmp(&stream_type, &ff_asf_audio_stream))
630 type = AVMEDIA_TYPE_AUDIO;
631 else if (!ff_guidcmp(&stream_type, &ff_asf_video_stream))
632 type = AVMEDIA_TYPE_VIDEO;
633 else if (!ff_guidcmp(&stream_type, &ff_asf_jfif_media))
634 type = AVMEDIA_TYPE_VIDEO;
635 else if (!ff_guidcmp(&stream_type, &ff_asf_command_stream))
636 type = AVMEDIA_TYPE_DATA;
637 else if (!ff_guidcmp(&stream_type,
638 &ff_asf_ext_stream_embed_stream_header))
639 type = AVMEDIA_TYPE_UNKNOWN;
641 return AVERROR_INVALIDDATA;
643 ff_get_guid(pb, &stream_type); // error correction type
644 avio_skip(pb, 8); // skip the time offset
645 ts_data_len = avio_rl32(pb);
646 err_data_len = avio_rl32(pb);
647 flags = avio_rl16(pb); // bit 15 - Encrypted Content
649 stream_index = flags & ASF_STREAM_NUM;
650 for (i = 0; i < asf->nb_streams; i++)
651 if (stream_index == asf->asf_st[i]->stream_index) {
652 av_log(s, AV_LOG_WARNING,
653 "Duplicate stream found, this stream will be ignored.\n");
654 align_position(pb, asf->offset, size);
658 st = avformat_new_stream(s, NULL);
660 return AVERROR(ENOMEM);
661 avpriv_set_pts_info(st, 32, 1, 1000); // pts should be dword, in milliseconds
662 st->codecpar->codec_type = type;
663 asf->asf_st[asf->nb_streams] = av_mallocz(sizeof(*asf_st));
664 if (!asf->asf_st[asf->nb_streams])
665 return AVERROR(ENOMEM);
666 asf_st = asf->asf_st[asf->nb_streams];
668 asf_st->stream_index = stream_index;
669 asf_st->index = st->index;
671 st->id = flags & ASF_STREAM_NUM;
672 asf_st->pkt.data_size = 0;
673 asf_st->pkt.avpkt = av_packet_alloc();
674 if (!asf_st->pkt.avpkt)
675 return AVERROR(ENOMEM);
676 avio_skip(pb, 4); // skip reserved field
679 case AVMEDIA_TYPE_AUDIO:
680 asf_st->type = AVMEDIA_TYPE_AUDIO;
681 if ((ret = ff_get_wav_header(s, pb, st->codecpar, ts_data_len, 0)) < 0)
684 case AVMEDIA_TYPE_VIDEO:
685 asf_st->type = AVMEDIA_TYPE_VIDEO;
686 if ((ret = parse_video_info(pb, st)) < 0)
690 avio_skip(pb, ts_data_len);
695 if (type == AVMEDIA_TYPE_AUDIO) {
696 uint8_t span = avio_r8(pb);
699 asf_st->virtual_pkt_len = avio_rl16(pb);
700 asf_st->virtual_chunk_len = avio_rl16(pb);
701 if (!asf_st->virtual_chunk_len || !asf_st->virtual_pkt_len)
702 return AVERROR_INVALIDDATA;
703 avio_skip(pb, err_data_len - 5);
705 avio_skip(pb, err_data_len - 1);
707 avio_skip(pb, err_data_len);
710 align_position(pb, asf->offset, size);
715 static void set_language(AVFormatContext *s, const char *rfc1766, AVDictionary **met)
717 // language abbr should contain at least 2 chars
718 if (rfc1766 && strlen(rfc1766) > 1) {
719 const char primary_tag[3] = { rfc1766[0], rfc1766[1], '\0' }; // ignore country code if any
720 const char *iso6392 = ff_convert_lang_to(primary_tag,
721 AV_LANG_ISO639_2_BIBL);
723 if (av_dict_set(met, "language", iso6392, 0) < 0)
724 av_log(s, AV_LOG_WARNING, "av_dict_set failed.\n");
728 static int asf_read_ext_stream_properties(AVFormatContext *s, const GUIDParseTable *g)
730 ASFContext *asf = s->priv_data;
731 AVIOContext *pb = s->pb;
734 uint16_t nb_st_name, nb_pay_exts, st_num, lang_idx;
737 uint64_t start_time, end_time, time_per_frame;
738 uint64_t size = avio_rl64(pb);
740 start_time = avio_rl64(pb);
741 end_time = avio_rl64(pb);
742 bitrate = avio_rl32(pb);
743 avio_skip(pb, 28); // skip some unused values
744 st_num = avio_rl16(pb);
745 st_num &= ASF_STREAM_NUM;
746 lang_idx = avio_rl16(pb); // Stream Language ID Index
747 if (lang_idx >= ASF_MAX_STREAMS)
748 return AVERROR_INVALIDDATA;
749 for (i = 0; i < asf->nb_streams; i++) {
750 if (st_num == asf->asf_st[i]->stream_index) {
751 st = s->streams[asf->asf_st[i]->index];
752 asf->asf_st[i]->lang_idx = lang_idx;
756 time_per_frame = avio_rl64(pb); // average time per frame
758 st->start_time = start_time;
759 st->duration = end_time - start_time;
760 st->codecpar->bit_rate = bitrate;
761 st->avg_frame_rate.num = 10000000;
762 st->avg_frame_rate.den = time_per_frame;
764 nb_st_name = avio_rl16(pb);
765 nb_pay_exts = avio_rl16(pb);
766 for (i = 0; i < nb_st_name; i++) {
769 avio_rl16(pb); // Language ID Index
774 for (i = 0; i < nb_pay_exts; i++) {
776 avio_skip(pb, 16); // Extension System ID
777 avio_skip(pb, 2); // Extension Data Size
782 if ((ret = ff_get_guid(pb, &guid)) < 0) {
783 align_position(pb, asf->offset, size);
789 if (g && !(strcmp(g->name, "Stream Properties"))) {
790 if ((ret = g->read_object(s, g)) < 0)
794 align_position(pb, asf->offset, size);
798 static int asf_read_language_list(AVFormatContext *s, const GUIDParseTable *g)
800 ASFContext *asf = s->priv_data;
801 AVIOContext *pb = s->pb;
803 uint64_t size = avio_rl64(pb);
804 uint16_t nb_langs = avio_rl16(pb);
806 if (nb_langs < ASF_MAX_STREAMS) {
807 for (i = 0; i < nb_langs; i++) {
812 if ((ret = get_asf_string(pb, len, asf->asf_sd[i].langs,
813 sizeof(asf->asf_sd[i].langs))) < 0) {
819 align_position(pb, asf->offset, size);
823 // returns data object offset when reading this object for the first time
824 static int asf_read_data(AVFormatContext *s, const GUIDParseTable *g)
826 ASFContext *asf = s->priv_data;
827 AVIOContext *pb = s->pb;
828 uint64_t size = asf->data_size = avio_rl64(pb);
831 if (!asf->data_reached) {
832 asf->data_reached = 1;
833 asf->data_offset = asf->offset;
836 for (i = 0; i < asf->nb_streams; i++) {
837 if (!(asf->b_flags & ASF_FLAG_BROADCAST))
838 s->streams[i]->duration = asf->duration;
840 asf->nb_mult_left = 0;
842 asf->state = PARSE_PACKET_HEADER;
843 asf->return_subpayload = 0;
844 asf->packet_size_internal = 0;
845 avio_skip(pb, 16); // skip File ID
846 size = avio_rl64(pb); // Total Data Packets
847 if (size != asf->nb_packets)
848 av_log(s, AV_LOG_WARNING,
849 "Number of Packets from File Properties Object is not equal to Total"
850 "Datapackets value! num of packets %"PRIu64" total num %"PRIu64".\n",
851 size, asf->nb_packets);
852 avio_skip(pb, 2); // skip reserved field
853 asf->first_packet_offset = avio_tell(pb);
854 if ((pb->seekable & AVIO_SEEKABLE_NORMAL) && !(asf->b_flags & ASF_FLAG_BROADCAST))
855 align_position(pb, asf->offset, asf->data_size);
860 static int asf_read_simple_index(AVFormatContext *s, const GUIDParseTable *g)
862 ASFContext *asf = s->priv_data;
863 AVIOContext *pb = s->pb;
865 uint64_t interval; // index entry time interval in 100 ns units, usually it's 1s
866 uint32_t pkt_num, nb_entries;
867 int32_t prev_pkt_num = -1;
870 uint64_t size = avio_rl64(pb);
872 // simple index objects should be ordered by stream number, this loop tries to find
873 // the first not indexed video stream
874 for (i = 0; i < asf->nb_streams; i++) {
875 if ((asf->asf_st[i]->type == AVMEDIA_TYPE_VIDEO) && !asf->asf_st[i]->indexed) {
876 asf->asf_st[i]->indexed = 1;
877 st = s->streams[asf->asf_st[i]->index];
882 avio_skip(pb, size - 24); // if there's no video stream, skip index object
885 avio_skip(pb, 16); // skip File ID
886 interval = avio_rl64(pb);
888 nb_entries = avio_rl32(pb);
889 for (i = 0; i < nb_entries; i++) {
890 pkt_num = avio_rl32(pb);
891 offset = avio_skip(pb, 2);
893 av_log(s, AV_LOG_ERROR, "Skipping failed in asf_read_simple_index.\n");
896 if (prev_pkt_num != pkt_num) {
897 av_add_index_entry(st, asf->first_packet_offset + asf->packet_size *
898 pkt_num, av_rescale(interval, i, 10000),
899 asf->packet_size, 0, AVINDEX_KEYFRAME);
900 prev_pkt_num = pkt_num;
903 asf->is_simple_index = 1;
904 align_position(pb, asf->offset, size);
909 static const GUIDParseTable gdef[] = {
910 { "Data", { 0x75, 0xB2, 0x26, 0x36, 0x66, 0x8E, 0x11, 0xCF, 0xA6, 0xD9, 0x00, 0xAA, 0x00, 0x62, 0xCE, 0x6C }, asf_read_data, 1 },
911 { "Simple Index", { 0x33, 0x00, 0x08, 0x90, 0xE5, 0xB1, 0x11, 0xCF, 0x89, 0xF4, 0x00, 0xA0, 0xC9, 0x03, 0x49, 0xCB }, asf_read_simple_index, 1 },
912 { "Content Description", { 0x75, 0xB2, 0x26, 0x33, 0x66 ,0x8E, 0x11, 0xCF, 0xA6, 0xD9, 0x00, 0xAA, 0x00, 0x62, 0xCE, 0x6C }, asf_read_content_desc, 1 },
913 { "Extended Content Description", { 0xD2, 0xD0, 0xA4, 0x40, 0xE3, 0x07, 0x11, 0xD2, 0x97, 0xF0, 0x00, 0xA0, 0xC9, 0x5e, 0xA8, 0x50 }, asf_read_ext_content, 1 },
914 { "Stream Bitrate Properties", { 0x7B, 0xF8, 0x75, 0xCE, 0x46, 0x8D, 0x11, 0xD1, 0x8D, 0x82, 0x00, 0x60, 0x97, 0xC9, 0xA2, 0xB2 }, asf_read_unknown, 1 },
915 { "File Properties", { 0x8C, 0xAB, 0xDC, 0xA1, 0xA9, 0x47, 0x11, 0xCF, 0x8E, 0xE4, 0x00, 0xC0, 0x0C, 0x20, 0x53, 0x65 }, asf_read_properties, 1 },
916 { "Header Extension", { 0x5F, 0xBF, 0x03, 0xB5, 0xA9, 0x2E, 0x11, 0xCF, 0x8E, 0xE3, 0x00, 0xC0, 0x0C, 0x20, 0x53, 0x65 }, asf_read_unknown, 0 },
917 { "Stream Properties", { 0xB7, 0xDC, 0x07, 0x91, 0xA9, 0xB7, 0x11, 0xCF, 0x8E, 0xE6, 0x00, 0xC0, 0x0C, 0x20, 0x53, 0x65 }, asf_read_stream_properties, 1 },
918 { "Codec List", { 0x86, 0xD1, 0x52, 0x40, 0x31, 0x1D, 0x11, 0xD0, 0xA3, 0xA4, 0x00, 0xA0, 0xC9, 0x03, 0x48, 0xF6 }, asf_read_unknown, 1 },
919 { "Marker", { 0xF4, 0x87, 0xCD, 0x01, 0xA9, 0x51, 0x11, 0xCF, 0x8E, 0xE6, 0x00, 0xC0, 0x0C, 0x20, 0x53, 0x65 }, asf_read_marker, 1 },
920 { "Script Command", { 0x1E, 0xFB, 0x1A, 0x30, 0x0B, 0x62, 0x11, 0xD0, 0xA3, 0x9B, 0x00, 0xA0, 0xC9, 0x03, 0x48, 0xF6 }, asf_read_unknown, 1 },
921 { "Language List", { 0x7C, 0x43, 0x46, 0xa9, 0xef, 0xe0, 0x4B, 0xFC, 0xB2, 0x29, 0x39, 0x3e, 0xde, 0x41, 0x5c, 0x85 }, asf_read_language_list, 1},
922 { "Padding", { 0x18, 0x06, 0xD4, 0x74, 0xCA, 0xDF, 0x45, 0x09, 0xA4, 0xBA, 0x9A, 0xAB, 0xCB, 0x96, 0xAA, 0xE8 }, asf_read_unknown, 1 },
923 { "DRMv1 Header", { 0x22, 0x11, 0xB3, 0xFB, 0xBD, 0x23, 0x11, 0xD2, 0xB4, 0xB7, 0x00, 0xA0, 0xC9, 0x55, 0xFC, 0x6E }, asf_read_unknown, 1 },
924 { "DRMv2 Header", { 0x29, 0x8A, 0xE6, 0x14, 0x26, 0x22, 0x4C, 0x17, 0xB9, 0x35, 0xDA, 0xE0, 0x7E, 0xE9, 0x28, 0x9c }, asf_read_unknown, 1 },
925 { "Index", { 0xD6, 0xE2, 0x29, 0xD3, 0x35, 0xDA, 0x11, 0xD1, 0x90, 0x34, 0x00, 0xA0, 0xC9, 0x03, 0x49, 0xBE }, asf_read_unknown, 1 },
926 { "Media Object Index", { 0xFE, 0xB1, 0x03, 0xF8, 0x12, 0xAD, 0x4C, 0x64, 0x84, 0x0F, 0x2A, 0x1D, 0x2F, 0x7A, 0xD4, 0x8C }, asf_read_unknown, 1 },
927 { "Timecode Index", { 0x3C, 0xB7, 0x3F, 0xD0, 0x0C, 0x4A, 0x48, 0x03, 0x95, 0x3D, 0xED, 0xF7, 0xB6, 0x22, 0x8F, 0x0C }, asf_read_unknown, 0 },
928 { "Bitrate_Mutual_Exclusion", { 0xD6, 0xE2, 0x29, 0xDC, 0x35, 0xDA, 0x11, 0xD1, 0x90, 0x34, 0x00, 0xA0, 0xC9, 0x03, 0x49, 0xBE }, asf_read_unknown, 1 },
929 { "Error Correction", { 0x75, 0xB2, 0x26, 0x35, 0x66, 0x8E, 0x11, 0xCF, 0xA6, 0xD9, 0x00, 0xAA, 0x00, 0x62, 0xCE, 0x6C }, asf_read_unknown, 1 },
930 { "Content Branding", { 0x22, 0x11, 0xB3, 0xFA, 0xBD, 0x23, 0x11, 0xD2, 0xB4, 0xB7, 0x00, 0xA0, 0xC9, 0x55, 0xFC, 0x6E }, asf_read_unknown, 1 },
931 { "Content Encryption", { 0x22, 0x11, 0xB3, 0xFB, 0xBD, 0x23, 0x11, 0xD2, 0xB4, 0xB7, 0x00, 0xA0, 0xC9, 0x55, 0xFC, 0x6E }, asf_read_unknown, 1 },
932 { "Extended Content Encryption", { 0x29, 0x8A, 0xE6, 0x14, 0x26, 0x22, 0x4C, 0x17, 0xB9, 0x35, 0xDA, 0xE0, 0x7E, 0xE9, 0x28, 0x9C }, asf_read_unknown, 1 },
933 { "Digital Signature", { 0x22, 0x11, 0xB3, 0xFC, 0xBD, 0x23, 0x11, 0xD2, 0xB4, 0xB7, 0x00, 0xA0, 0xC9, 0x55, 0xFC, 0x6E }, asf_read_unknown, 1 },
934 { "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 },
935 { "Advanced Mutual Exclusion", { 0xA0, 0x86, 0x49, 0xCF, 0x47, 0x75, 0x46, 0x70, 0x8A, 0x16, 0x6E, 0x35, 0x35, 0x75, 0x66, 0xCD }, asf_read_unknown, 1 },
936 { "Group Mutual Exclusion", { 0xD1, 0x46, 0x5A, 0x40, 0x5A, 0x79, 0x43, 0x38, 0xB7, 0x1B, 0xE3, 0x6B, 0x8F, 0xD6, 0xC2, 0x49 }, asf_read_unknown, 1},
937 { "Stream Prioritization", { 0xD4, 0xFE, 0xD1, 0x5B, 0x88, 0xD3, 0x45, 0x4F, 0x81, 0xF0, 0xED, 0x5C, 0x45, 0x99, 0x9E, 0x24 }, asf_read_unknown, 1 },
938 { "Bandwidth Sharing Object", { 0xA6, 0x96, 0x09, 0xE6, 0x51, 0x7B, 0x11, 0xD2, 0xB6, 0xAF, 0x00, 0xC0, 0x4F, 0xD9, 0x08, 0xE9 }, asf_read_unknown, 1 },
939 { "Metadata", { 0xC5, 0xF8, 0xCB, 0xEA, 0x5B, 0xAF, 0x48, 0x77, 0x84, 0x67, 0xAA, 0x8C, 0x44, 0xFA, 0x4C, 0xCA }, asf_read_metadata_obj, 1 },
940 { "Metadata Library", { 0x44, 0x23, 0x1C, 0x94, 0x94, 0x98, 0x49, 0xD1, 0xA1, 0x41, 0x1D, 0x13, 0x4E, 0x45, 0x70, 0x54 }, asf_read_metadata_obj, 1 },
941 { "Audio Spread", { 0xBF, 0xC3, 0xCD, 0x50, 0x61, 0x8F, 0x11, 0xCF, 0x8B, 0xB2, 0x00, 0xAA, 0x00, 0xB4, 0xE2, 0x20 }, asf_read_unknown, 1 },
942 { "Index Parameters", { 0xD6, 0xE2, 0x29, 0xDF, 0x35, 0xDA, 0x11, 0xD1, 0x90, 0x34, 0x00, 0xA0, 0xC9, 0x03, 0x49, 0xBE }, asf_read_unknown, 1 },
943 { "Content Encryption System Windows Media DRM Network Devices",
944 { 0x7A, 0x07, 0x9B, 0xB6, 0xDA, 0XA4, 0x4e, 0x12, 0xA5, 0xCA, 0x91, 0xD3, 0x8D, 0xC1, 0x1A, 0x8D }, asf_read_unknown, 1 },
945 { "Mutex Language", { 0xD6, 0xE2, 0x2A, 0x00, 0x25, 0xDA, 0x11, 0xD1, 0x90, 0x34, 0x00, 0xA0, 0xC9, 0x03, 0x49, 0xBE }, asf_read_unknown, 1 },
946 { "Mutex Bitrate", { 0xD6, 0xE2, 0x2A, 0x01, 0x25, 0xDA, 0x11, 0xD1, 0x90, 0x34, 0x00, 0xA0, 0xC9, 0x03, 0x49, 0xBE }, asf_read_unknown, 1 },
947 { "Mutex Unknown", { 0xD6, 0xE2, 0x2A, 0x02, 0x25, 0xDA, 0x11, 0xD1, 0x90, 0x34, 0x00, 0xA0, 0xC9, 0x03, 0x49, 0xBE }, asf_read_unknown, 1 },
948 { "Bandwidth Sharing Exclusive", { 0xAF, 0x60, 0x60, 0xAA, 0x51, 0x97, 0x11, 0xD2, 0xB6, 0xAF, 0x00, 0xC0, 0x4F, 0xD9, 0x08, 0xE9 }, asf_read_unknown, 1 },
949 { "Bandwidth Sharing Partial", { 0xAF, 0x60, 0x60, 0xAB, 0x51, 0x97, 0x11, 0xD2, 0xB6, 0xAF, 0x00, 0xC0, 0x4F, 0xD9, 0x08, 0xE9 }, asf_read_unknown, 1 },
950 { "Payload Extension System Timecode", { 0x39, 0x95, 0x95, 0xEC, 0x86, 0x67, 0x4E, 0x2D, 0x8F, 0xDB, 0x98, 0x81, 0x4C, 0xE7, 0x6C, 0x1E }, asf_read_unknown, 1 },
951 { "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 },
952 { "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 },
953 { "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 },
954 { "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 },
955 { "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 },
956 { "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 },
959 #define READ_LEN(flag, name, len) \
961 if ((flag) == name ## IS_BYTE) \
963 else if ((flag) == name ## IS_WORD) \
964 len = avio_rl16(pb); \
965 else if ((flag) == name ## IS_DWORD) \
966 len = avio_rl32(pb); \
971 static int asf_read_subpayload(AVFormatContext *s, AVPacket *pkt, int is_header)
973 ASFContext *asf = s->priv_data;
974 AVIOContext *pb = s->pb;
979 asf->dts_delta = avio_r8(pb);
980 if (asf->nb_mult_left) {
981 asf->mult_sub_len = avio_rl16(pb); // total
983 asf->sub_header_offset = avio_tell(pb);
987 sub_len = avio_r8(pb);
988 if ((ret = av_get_packet(pb, pkt, sub_len)) < 0) // each subpayload is entire frame
990 for (i = 0; i < asf->nb_streams; i++) {
991 if (asf->stream_index == asf->asf_st[i]->stream_index) {
992 pkt->stream_index = asf->asf_st[i]->index;
996 asf->return_subpayload = 1;
998 asf->return_subpayload = 0;
1002 pkt->dts = asf->sub_dts + (asf->nb_sub - 1) * asf->dts_delta - asf->preroll;
1003 if (asf->nb_mult_left && (avio_tell(pb) >=
1004 (asf->sub_header_offset + asf->mult_sub_len))) {
1006 asf->nb_mult_left--;
1008 if (avio_tell(pb) >= asf->packet_offset + asf->packet_size - asf->pad_len) {
1010 if (!asf->nb_mult_left) {
1011 avio_skip(pb, asf->pad_len);
1012 if (avio_tell(pb) != asf->packet_offset + asf->packet_size) {
1013 if (!asf->packet_size)
1014 return AVERROR_INVALIDDATA;
1015 av_log(s, AV_LOG_WARNING,
1016 "Position %"PRId64" wrong, should be %"PRId64"\n",
1017 avio_tell(pb), asf->packet_offset + asf->packet_size);
1018 avio_seek(pb, asf->packet_offset + asf->packet_size, SEEK_SET);
1026 static void reset_packet(ASFPacket *asf_pkt)
1028 asf_pkt->size_left = 0;
1029 asf_pkt->data_size = 0;
1030 asf_pkt->duration = 0;
1033 av_packet_unref(asf_pkt->avpkt);
1036 static int asf_read_replicated_data(AVFormatContext *s, ASFPacket *asf_pkt)
1038 ASFContext *asf = s->priv_data;
1039 AVIOContext *pb = s->pb;
1042 if (!asf_pkt->data_size) {
1043 data_size = avio_rl32(pb); // read media object size
1045 return AVERROR_INVALIDDATA;
1046 if ((ret = av_new_packet(asf_pkt->avpkt, data_size)) < 0)
1048 asf_pkt->data_size = asf_pkt->size_left = data_size;
1050 avio_skip(pb, 4); // reading of media object size is already done
1051 asf_pkt->dts = avio_rl32(pb); // read presentation time
1052 if (asf->rep_data_len >= 8)
1053 avio_skip(pb, asf->rep_data_len - 8); // skip replicated data
1058 static int asf_read_multiple_payload(AVFormatContext *s, AVPacket *pkt,
1061 ASFContext *asf = s->priv_data;
1062 AVIOContext *pb = s->pb;
1068 // if replicated length is 1, subpayloads are present
1069 if (asf->rep_data_len == 1) {
1071 asf->state = READ_MULTI_SUB;
1072 pkt->flags = asf_pkt->flags;
1073 if ((ret = asf_read_subpayload(s, pkt, 1)) < 0)
1076 if (asf->rep_data_len)
1077 if ((ret = asf_read_replicated_data(s, asf_pkt)) < 0)
1079 pay_len = avio_rl16(pb); // payload length should be WORD
1080 if (pay_len > asf->packet_size) {
1081 av_log(s, AV_LOG_ERROR,
1082 "Error: invalid data packet size, pay_len %"PRIu16", "
1083 "asf->packet_size %"PRIu32", offset %"PRId64".\n",
1084 pay_len, asf->packet_size, avio_tell(pb));
1085 return AVERROR_INVALIDDATA;
1087 p = asf_pkt->avpkt->data + asf_pkt->data_size - asf_pkt->size_left;
1088 if (pay_len > asf_pkt->size_left) {
1089 av_log(s, AV_LOG_ERROR,
1090 "Error: invalid buffer size, pay_len %d, data size left %d.\n",
1091 pay_len, asf_pkt->size_left);
1092 skip = pay_len - asf_pkt->size_left;
1093 pay_len = asf_pkt->size_left;
1095 if (asf_pkt->size_left <= 0)
1096 return AVERROR_INVALIDDATA;
1097 if ((ret = avio_read(pb, p, pay_len)) < 0)
1099 if (s->key && s->keylen == 20)
1100 ff_asfcrypt_dec(s->key, p, ret);
1101 avio_skip(pb, skip);
1102 asf_pkt->size_left -= pay_len;
1103 asf->nb_mult_left--;
1109 static int asf_read_single_payload(AVFormatContext *s, ASFPacket *asf_pkt)
1111 ASFContext *asf = s->priv_data;
1112 AVIOContext *pb = s->pb;
1118 if (!asf_pkt->data_size) {
1119 data_size = avio_rl32(pb); // read media object size
1122 if ((ret = av_new_packet(asf_pkt->avpkt, data_size)) < 0)
1124 asf_pkt->data_size = asf_pkt->size_left = data_size;
1126 avio_skip(pb, 4); // skip media object size
1127 asf_pkt->dts = avio_rl32(pb); // read presentation time
1128 if (asf->rep_data_len >= 8)
1129 avio_skip(pb, asf->rep_data_len - 8); // skip replicated data
1130 offset = avio_tell(pb);
1132 // size of the payload - size of the packet without header and padding
1133 if (asf->packet_size_internal)
1134 size = asf->packet_size_internal - offset + asf->packet_offset - asf->pad_len;
1136 size = asf->packet_size - offset + asf->packet_offset - asf->pad_len;
1137 if (size > asf->packet_size) {
1138 av_log(s, AV_LOG_ERROR,
1139 "Error: invalid data packet size, offset %"PRId64".\n",
1141 return AVERROR_INVALIDDATA;
1143 p = asf_pkt->avpkt->data + asf_pkt->data_size - asf_pkt->size_left;
1144 if (size > asf_pkt->size_left || asf_pkt->size_left <= 0)
1145 return AVERROR_INVALIDDATA;
1146 if (asf_pkt->size_left > size)
1147 asf_pkt->size_left -= size;
1149 asf_pkt->size_left = 0;
1150 if ((ret = avio_read(pb, p, size)) < 0)
1152 if (s->key && s->keylen == 20)
1153 ff_asfcrypt_dec(s->key, p, ret);
1154 if (asf->packet_size_internal)
1155 avio_skip(pb, asf->packet_size - asf->packet_size_internal);
1156 avio_skip(pb, asf->pad_len); // skip padding
1161 static int asf_read_payload(AVFormatContext *s, AVPacket *pkt)
1163 ASFContext *asf = s->priv_data;
1164 AVIOContext *pb = s->pb;
1166 ASFPacket *asf_pkt = NULL;
1168 if (!asf->sub_left) {
1169 uint32_t off_len, media_len;
1172 stream_num = avio_r8(pb);
1173 asf->stream_index = stream_num & ASF_STREAM_NUM;
1174 for (i = 0; i < asf->nb_streams; i++) {
1175 if (asf->stream_index == asf->asf_st[i]->stream_index) {
1176 asf_pkt = &asf->asf_st[i]->pkt;
1177 asf_pkt->stream_index = asf->asf_st[i]->index;
1182 if (asf->packet_offset + asf->packet_size <= asf->data_offset + asf->data_size) {
1183 if (!asf->packet_size) {
1184 av_log(s, AV_LOG_ERROR, "Invalid packet size 0.\n");
1185 return AVERROR_INVALIDDATA;
1187 avio_seek(pb, asf->packet_offset + asf->packet_size, SEEK_SET);
1188 av_log(s, AV_LOG_WARNING, "Skipping the stream with the invalid stream index %d.\n",
1190 return AVERROR(EAGAIN);
1192 return AVERROR_INVALIDDATA;
1195 if (stream_num >> 7)
1196 asf_pkt->flags |= AV_PKT_FLAG_KEY;
1197 READ_LEN(asf->prop_flags & ASF_PL_MASK_MEDIA_OBJECT_NUMBER_LENGTH_FIELD_SIZE,
1198 ASF_PL_FLAG_MEDIA_OBJECT_NUMBER_LENGTH_FIELD_, media_len);
1199 READ_LEN(asf->prop_flags & ASF_PL_MASK_OFFSET_INTO_MEDIA_OBJECT_LENGTH_FIELD_SIZE,
1200 ASF_PL_FLAG_OFFSET_INTO_MEDIA_OBJECT_LENGTH_FIELD_, off_len);
1201 READ_LEN(asf->prop_flags & ASF_PL_MASK_REPLICATED_DATA_LENGTH_FIELD_SIZE,
1202 ASF_PL_FLAG_REPLICATED_DATA_LENGTH_FIELD_, asf->rep_data_len);
1203 if (asf_pkt->size_left && (asf_pkt->frame_num != media_len)) {
1204 av_log(s, AV_LOG_WARNING, "Unfinished frame will be ignored\n");
1205 reset_packet(asf_pkt);
1207 asf_pkt->frame_num = media_len;
1208 asf->sub_dts = off_len;
1209 if (asf->nb_mult_left) {
1210 if ((ret = asf_read_multiple_payload(s, pkt, asf_pkt)) < 0)
1212 } else if (asf->rep_data_len == 1) {
1214 asf->state = READ_SINGLE;
1215 pkt->flags = asf_pkt->flags;
1216 if ((ret = asf_read_subpayload(s, pkt, 1)) < 0)
1219 if ((ret = asf_read_single_payload(s, asf_pkt)) < 0)
1223 for (i = 0; i <= asf->nb_streams; i++) {
1224 if (asf->stream_index == asf->asf_st[i]->stream_index) {
1225 asf_pkt = &asf->asf_st[i]->pkt;
1230 return AVERROR_INVALIDDATA;
1231 pkt->flags = asf_pkt->flags;
1232 pkt->dts = asf_pkt->dts;
1233 pkt->stream_index = asf->asf_st[i]->index;
1234 if ((ret = asf_read_subpayload(s, pkt, 0)) < 0) // read subpayload without its header
1241 static int asf_read_packet_header(AVFormatContext *s)
1243 ASFContext *asf = s->priv_data;
1244 AVIOContext *pb = s->pb;
1246 uint32_t av_unused seq;
1247 unsigned char error_flags, len_flags, pay_flags;
1249 asf->packet_offset = avio_tell(pb);
1250 error_flags = avio_r8(pb); // read Error Correction Flags
1251 if (error_flags & ASF_PACKET_FLAG_ERROR_CORRECTION_PRESENT) {
1252 if (!(error_flags & ASF_ERROR_CORRECTION_LENGTH_TYPE)) {
1253 size = error_flags & ASF_PACKET_ERROR_CORRECTION_DATA_SIZE;
1254 avio_skip(pb, size);
1256 len_flags = avio_r8(pb);
1258 len_flags = error_flags;
1259 asf->prop_flags = avio_r8(pb);
1260 READ_LEN(len_flags & ASF_PPI_MASK_PACKET_LENGTH_FIELD_SIZE,
1261 ASF_PPI_FLAG_PACKET_LENGTH_FIELD_, asf->packet_size_internal);
1262 READ_LEN(len_flags & ASF_PPI_MASK_SEQUENCE_FIELD_SIZE,
1263 ASF_PPI_FLAG_SEQUENCE_FIELD_, seq);
1264 READ_LEN(len_flags & ASF_PPI_MASK_PADDING_LENGTH_FIELD_SIZE,
1265 ASF_PPI_FLAG_PADDING_LENGTH_FIELD_, asf->pad_len );
1266 asf->send_time = avio_rl32(pb); // send time
1267 avio_skip(pb, 2); // skip duration
1268 if (len_flags & ASF_PPI_FLAG_MULTIPLE_PAYLOADS_PRESENT) { // Multiple Payloads present
1269 pay_flags = avio_r8(pb);
1270 asf->nb_mult_left = (pay_flags & ASF_NUM_OF_PAYLOADS);
1276 static int asf_deinterleave(AVFormatContext *s, ASFPacket *asf_pkt, int st_num)
1278 ASFContext *asf = s->priv_data;
1279 ASFStream *asf_st = asf->asf_st[st_num];
1280 unsigned char *p = asf_pkt->avpkt->data;
1281 uint16_t pkt_len = asf->asf_st[st_num]->virtual_pkt_len;
1282 uint16_t chunk_len = asf->asf_st[st_num]->virtual_chunk_len;
1283 int nchunks = pkt_len / chunk_len;
1285 int pos = 0, j, l, ret;
1288 data = av_malloc(asf_pkt->data_size + AV_INPUT_BUFFER_PADDING_SIZE);
1290 return AVERROR(ENOMEM);
1291 memset(data + asf_pkt->data_size, 0, AV_INPUT_BUFFER_PADDING_SIZE);
1293 while (asf_pkt->data_size >= asf_st->span * pkt_len + pos) {
1294 if (pos >= asf_pkt->data_size) {
1297 for (l = 0; l < pkt_len; l++) {
1298 if (pos >= asf_pkt->data_size) {
1301 for (j = 0; j < asf_st->span; j++) {
1302 if ((pos + chunk_len) >= asf_pkt->data_size)
1305 p + (j * nchunks + l) * chunk_len,
1310 p += asf_st->span * pkt_len;
1311 if (p > asf_pkt->avpkt->data + asf_pkt->data_size)
1314 av_packet_unref(asf_pkt->avpkt);
1315 ret = av_packet_from_data(asf_pkt->avpkt, data, asf_pkt->data_size);
1322 static int asf_read_packet(AVFormatContext *s, AVPacket *pkt)
1324 ASFContext *asf = s->priv_data;
1325 AVIOContext *pb = s->pb;
1328 if ((avio_tell(pb) >= asf->data_offset + asf->data_size) &&
1329 !(asf->b_flags & ASF_FLAG_BROADCAST))
1331 while (!pb->eof_reached) {
1332 if (asf->state == PARSE_PACKET_HEADER) {
1333 asf_read_packet_header(s);
1334 if (pb->eof_reached)
1336 if (!asf->nb_mult_left)
1337 asf->state = READ_SINGLE;
1339 asf->state = READ_MULTI;
1341 ret = asf_read_payload(s, pkt);
1342 if (ret == AVERROR(EAGAIN)) {
1343 asf->state = PARSE_PACKET_HEADER;
1349 switch (asf->state) {
1352 asf->state = PARSE_PACKET_HEADER;
1354 case READ_MULTI_SUB:
1355 if (!asf->sub_left && !asf->nb_mult_left) {
1356 asf->state = PARSE_PACKET_HEADER;
1357 if (!asf->return_subpayload &&
1358 (avio_tell(pb) <= asf->packet_offset +
1359 asf->packet_size - asf->pad_len))
1360 avio_skip(pb, asf->pad_len); // skip padding
1361 if (asf->packet_offset + asf->packet_size > avio_tell(pb))
1362 avio_seek(pb, asf->packet_offset + asf->packet_size, SEEK_SET);
1363 } else if (!asf->sub_left)
1364 asf->state = READ_MULTI;
1367 if (!asf->nb_mult_left) {
1368 asf->state = PARSE_PACKET_HEADER;
1369 if (!asf->return_subpayload &&
1370 (avio_tell(pb) <= asf->packet_offset +
1371 asf->packet_size - asf->pad_len))
1372 avio_skip(pb, asf->pad_len); // skip padding
1373 if (asf->packet_offset + asf->packet_size > avio_tell(pb))
1374 avio_seek(pb, asf->packet_offset + asf->packet_size, SEEK_SET);
1378 if (asf->return_subpayload) {
1379 asf->return_subpayload = 0;
1382 for (i = 0; i < asf->nb_streams; i++) {
1383 ASFPacket *asf_pkt = &asf->asf_st[i]->pkt;
1384 if (asf_pkt && !asf_pkt->size_left && asf_pkt->data_size) {
1385 if (asf->asf_st[i]->span > 1 &&
1386 asf->asf_st[i]->type == AVMEDIA_TYPE_AUDIO)
1387 if ((ret = asf_deinterleave(s, asf_pkt, i)) < 0)
1389 av_packet_move_ref(pkt, asf_pkt->avpkt);
1390 pkt->stream_index = asf->asf_st[i]->index;
1391 pkt->flags = asf_pkt->flags;
1392 pkt->dts = asf_pkt->dts - asf->preroll;
1393 asf_pkt->data_size = 0;
1394 asf_pkt->frame_num = 0;
1400 if (pb->eof_reached)
1406 static int asf_read_close(AVFormatContext *s)
1408 ASFContext *asf = s->priv_data;
1411 for (i = 0; i < ASF_MAX_STREAMS; i++) {
1412 av_dict_free(&asf->asf_sd[i].asf_met);
1413 if (i < asf->nb_streams) {
1414 av_packet_free(&asf->asf_st[i]->pkt.avpkt);
1415 av_freep(&asf->asf_st[i]);
1419 asf->nb_streams = 0;
1423 static void reset_packet_state(AVFormatContext *s)
1425 ASFContext *asf = s->priv_data;
1428 asf->state = PARSE_PACKET_HEADER;
1430 asf->return_subpayload = 0;
1432 asf->sub_header_offset = 0;
1433 asf->packet_offset = asf->first_packet_offset;
1435 asf->rep_data_len = 0;
1437 asf->mult_sub_len = 0;
1438 asf->nb_mult_left = 0;
1440 asf->prop_flags = 0;
1442 for (i = 0; i < asf->nb_streams; i++) {
1443 ASFPacket *pkt = &asf->asf_st[i]->pkt;
1449 * Find a timestamp for the requested position within the payload
1450 * where the pos (position) is the offset inside the Data Object.
1451 * When position is not on the packet boundary, asf_read_timestamp tries
1452 * to find the closest packet offset after this position. If this packet
1453 * is a key frame, this packet timestamp is read and an index entry is created
1454 * for the packet. If this packet belongs to the requested stream,
1455 * asf_read_timestamp upgrades pos to the packet beginning offset and
1456 * returns this packet's dts. So returned dts is the dts of the first key frame with
1457 * matching stream number after given position.
1459 static int64_t asf_read_timestamp(AVFormatContext *s, int stream_index,
1460 int64_t *pos, int64_t pos_limit)
1462 ASFContext *asf = s->priv_data;
1463 int64_t pkt_pos = *pos, pkt_offset, dts = AV_NOPTS_VALUE, data_end;
1464 AVPacket *pkt = av_packet_alloc();
1468 return AVERROR(ENOMEM);
1470 data_end = asf->data_offset + asf->data_size;
1472 n = (pkt_pos - asf->first_packet_offset + asf->packet_size - 1) /
1474 n = av_clip(n, 0, ((data_end - asf->first_packet_offset) / asf->packet_size - 1));
1475 pkt_pos = asf->first_packet_offset + n * asf->packet_size;
1477 avio_seek(s->pb, pkt_pos, SEEK_SET);
1478 pkt_offset = pkt_pos;
1480 reset_packet_state(s);
1481 while (avio_tell(s->pb) < data_end) {
1483 int i, ret, st_found;
1485 pkt_offset = avio_tell(s->pb);
1486 if ((ret = asf_read_packet(s, pkt)) < 0) {
1487 av_packet_free(&pkt);
1488 dts = AV_NOPTS_VALUE;
1491 // ASFPacket may contain fragments of packets belonging to different streams,
1492 // pkt_offset is the offset of the first fragment within it.
1493 if ((pkt_offset >= (pkt_pos + asf->packet_size)))
1494 pkt_pos += asf->packet_size;
1495 for (i = 0; i < asf->nb_streams; i++) {
1496 ASFStream *st = asf->asf_st[i];
1499 if (pkt->flags & AV_PKT_FLAG_KEY) {
1502 av_add_index_entry(s->streams[pkt->stream_index], pkt_pos,
1503 dts, pkt->size, 0, AVINDEX_KEYFRAME);
1504 if (stream_index == st->index) {
1513 av_packet_unref(pkt);
1517 av_packet_free(&pkt);
1521 static int asf_read_seek(AVFormatContext *s, int stream_index,
1522 int64_t timestamp, int flags)
1524 ASFContext *asf = s->priv_data;
1527 if (s->streams[stream_index]->internal->nb_index_entries && asf->is_simple_index) {
1528 idx = av_index_search_timestamp(s->streams[stream_index], timestamp, flags);
1529 if (idx < 0 || idx >= s->streams[stream_index]->internal->nb_index_entries)
1530 return AVERROR_INVALIDDATA;
1531 avio_seek(s->pb, s->streams[stream_index]->internal->index_entries[idx].pos, SEEK_SET);
1533 if ((ret = ff_seek_frame_binary(s, stream_index, timestamp, flags)) < 0)
1537 reset_packet_state(s);
1542 static const GUIDParseTable *find_guid(ff_asf_guid guid)
1545 const GUIDParseTable *g;
1549 for (j = 0; j < FF_ARRAY_ELEMS(gdef); j++) {
1550 if (!(ret = memcmp(guid, g->guid, sizeof(g->guid))))
1558 static int detect_unknown_subobject(AVFormatContext *s, int64_t offset, int64_t size)
1560 ASFContext *asf = s->priv_data;
1561 AVIOContext *pb = s->pb;
1562 const GUIDParseTable *g = NULL;
1566 if (offset > INT64_MAX - size)
1567 return AVERROR_INVALIDDATA;
1569 while (avio_tell(pb) <= offset + size) {
1570 if (avio_tell(pb) == asf->offset)
1572 asf->offset = avio_tell(pb);
1573 if ((ret = ff_get_guid(pb, &guid)) < 0)
1575 g = find_guid(guid);
1577 if ((ret = g->read_object(s, g)) < 0)
1582 g2.name = "Unknown";
1583 g2.is_subobject = 1;
1584 asf_read_unknown(s, &g2);
1591 static int asf_read_header(AVFormatContext *s)
1593 ASFContext *asf = s->priv_data;
1594 AVIOContext *pb = s->pb;
1595 const GUIDParseTable *g = NULL;
1601 asf->is_simple_index = 0;
1602 ff_get_guid(pb, &guid);
1603 if (ff_guidcmp(&guid, &ff_asf_header))
1604 return AVERROR_INVALIDDATA;
1605 avio_skip(pb, 8); // skip header object size
1606 avio_skip(pb, 6); // skip number of header objects and 2 reserved bytes
1607 asf->data_reached = 0;
1609 /* 1 is here instead of pb->eof_reached because (when not streaming), Data are skipped
1610 * for the first time,
1611 * Index object is processed and got eof and then seeking back to the Data is performed.
1614 // for the cases when object size is invalid
1615 if (avio_tell(pb) == asf->offset)
1617 asf->offset = avio_tell(pb);
1618 if ((ret = ff_get_guid(pb, &guid)) < 0) {
1619 if (ret == AVERROR_EOF && asf->data_reached)
1624 g = find_guid(guid);
1626 asf->unknown_offset = asf->offset;
1628 if ((ret = g->read_object(s, g)) < 0)
1631 size = avio_rl64(pb);
1632 align_position(pb, asf->offset, size);
1634 if (asf->data_reached &&
1635 (!(pb->seekable & AVIO_SEEKABLE_NORMAL) ||
1636 (asf->b_flags & ASF_FLAG_BROADCAST)))
1640 if (!asf->data_reached) {
1641 av_log(s, AV_LOG_ERROR, "Data Object was not found.\n");
1642 ret = AVERROR_INVALIDDATA;
1645 if (pb->seekable & AVIO_SEEKABLE_NORMAL)
1646 avio_seek(pb, asf->first_packet_offset, SEEK_SET);
1648 for (i = 0; i < asf->nb_streams; i++) {
1649 const char *rfc1766 = asf->asf_sd[asf->asf_st[i]->lang_idx].langs;
1650 AVStream *st = s->streams[asf->asf_st[i]->index];
1651 set_language(s, rfc1766, &st->metadata);
1654 for (i = 0; i < ASF_MAX_STREAMS; i++) {
1655 AVStream *st = NULL;
1657 st = find_stream(s, i);
1659 av_dict_copy(&st->metadata, asf->asf_sd[i].asf_met, AV_DICT_IGNORE_SUFFIX);
1660 if (asf->asf_sd[i].aspect_ratio.num > 0 && asf->asf_sd[i].aspect_ratio.den > 0) {
1661 st->sample_aspect_ratio.num = asf->asf_sd[i].aspect_ratio.num;
1662 st->sample_aspect_ratio.den = asf->asf_sd[i].aspect_ratio.den;
1674 AVInputFormat ff_asf_o_demuxer = {
1676 .long_name = NULL_IF_CONFIG_SMALL("ASF (Advanced / Active Streaming Format)"),
1677 .priv_data_size = sizeof(ASFContext),
1678 .read_probe = asf_probe,
1679 .read_header = asf_read_header,
1680 .read_packet = asf_read_packet,
1681 .read_close = asf_read_close,
1682 .read_timestamp = asf_read_timestamp,
1683 .read_seek = asf_read_seek,
1684 .flags = AVFMT_NOBINSEARCH | AVFMT_NOGENSEARCH,