2 * ASF compatible demuxer
3 * Copyright (c) 2000, 2001 Fabrice Bellard
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
24 #include "libavutil/attributes.h"
25 #include "libavutil/avassert.h"
26 #include "libavutil/avstring.h"
27 #include "libavutil/bswap.h"
28 #include "libavutil/common.h"
29 #include "libavutil/dict.h"
30 #include "libavutil/internal.h"
31 #include "libavutil/mathematics.h"
32 #include "libavutil/opt.h"
34 #include "avio_internal.h"
35 #include "avlanguage.h"
42 typedef struct ASFPayload {
47 typedef struct ASFStream {
59 int ds_span; /* descrambling */
65 uint16_t stream_language_index;
68 uint32_t palette[256];
71 ASFPayload payload[8];
74 typedef struct ASFContext {
76 int asfid2avid[128]; ///< conversion table from asf ID 2 AVStream ID
77 ASFStream streams[128]; ///< it's max number and it's not that big
78 uint32_t stream_bitrates[128]; ///< max number of streams, bitrate for each (for streaming)
80 char stream_languages[128][6]; ///< max number of streams, language for each (RFC1766, e.g. en-US)
81 /* non streamed additonnal info */
84 /* only for reading */
85 uint64_t data_offset; ///< beginning of the first data packet
86 uint64_t data_object_offset; ///< data object offset (excl. GUID & size)
87 uint64_t data_object_size; ///< size of the data object
95 int packet_segsizetype;
98 int packet_replic_size;
101 unsigned int packet_frag_offset;
102 unsigned int packet_frag_size;
103 int64_t packet_frag_timestamp;
105 int packet_multi_size;
106 int packet_time_delta;
107 int packet_time_start;
112 ASFStream *asf_st; ///< currently decoded stream
114 int no_resync_search;
120 static const AVOption options[] = {
121 { "no_resync_search", "Don't try to resynchronize by looking for a certain optional start code", offsetof(ASFContext, no_resync_search), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, AV_OPT_FLAG_DECODING_PARAM },
122 { "export_xmp", "Export full XMP metadata", offsetof(ASFContext, export_xmp), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, AV_OPT_FLAG_DECODING_PARAM },
126 static const AVClass asf_class = {
127 .class_name = "asf demuxer",
128 .item_name = av_default_item_name,
130 .version = LIBAVUTIL_VERSION_INT,
136 #define ASF_MAX_STREAMS 127
137 #define FRAME_HEADER_SIZE 6
138 // Fix Me! FRAME_HEADER_SIZE may be different.
139 // (7 is known to be too large for GipsyGuitar.wmv)
142 static const ff_asf_guid stream_bitrate_guid = { /* (http://get.to/sdp) */
143 0xce, 0x75, 0xf8, 0x7b, 0x8d, 0x46, 0xd1, 0x11, 0x8d, 0x82, 0x00, 0x60, 0x97, 0xc9, 0xa2, 0xb2
146 #define PRINT_IF_GUID(g, cmp) \
147 if (!ff_guidcmp(g, &cmp)) \
148 av_log(NULL, AV_LOG_TRACE, "(GUID: %s) ", # cmp)
150 static void print_guid(ff_asf_guid *g)
153 PRINT_IF_GUID(g, ff_asf_header);
154 else PRINT_IF_GUID(g, ff_asf_file_header);
155 else PRINT_IF_GUID(g, ff_asf_stream_header);
156 else PRINT_IF_GUID(g, ff_asf_audio_stream);
157 else PRINT_IF_GUID(g, ff_asf_audio_conceal_none);
158 else PRINT_IF_GUID(g, ff_asf_video_stream);
159 else PRINT_IF_GUID(g, ff_asf_video_conceal_none);
160 else PRINT_IF_GUID(g, ff_asf_command_stream);
161 else PRINT_IF_GUID(g, ff_asf_comment_header);
162 else PRINT_IF_GUID(g, ff_asf_codec_comment_header);
163 else PRINT_IF_GUID(g, ff_asf_codec_comment1_header);
164 else PRINT_IF_GUID(g, ff_asf_data_header);
165 else PRINT_IF_GUID(g, ff_asf_simple_index_header);
166 else PRINT_IF_GUID(g, ff_asf_head1_guid);
167 else PRINT_IF_GUID(g, ff_asf_head2_guid);
168 else PRINT_IF_GUID(g, ff_asf_my_guid);
169 else PRINT_IF_GUID(g, ff_asf_ext_stream_header);
170 else PRINT_IF_GUID(g, ff_asf_extended_content_header);
171 else PRINT_IF_GUID(g, ff_asf_ext_stream_embed_stream_header);
172 else PRINT_IF_GUID(g, ff_asf_ext_stream_audio_stream);
173 else PRINT_IF_GUID(g, ff_asf_metadata_header);
174 else PRINT_IF_GUID(g, ff_asf_metadata_library_header);
175 else PRINT_IF_GUID(g, ff_asf_marker_header);
176 else PRINT_IF_GUID(g, stream_bitrate_guid);
177 else PRINT_IF_GUID(g, ff_asf_language_guid);
179 av_log(NULL, AV_LOG_TRACE, "(GUID: unknown) ");
180 for (i = 0; i < 16; i++)
181 av_log(NULL, AV_LOG_TRACE, " 0x%02x,", (*g)[i]);
182 av_log(NULL, AV_LOG_TRACE, "}\n");
186 #define print_guid(g) while(0)
189 static int asf_probe(const AVProbeData *pd)
191 /* check file header */
192 if (!ff_guidcmp(pd->buf, &ff_asf_header))
193 return AVPROBE_SCORE_MAX;
198 /* size of type 2 (BOOL) is 32bit for "Extended Content Description Object"
199 * but 16 bit for "Metadata Object" and "Metadata Library Object" */
200 static int get_value(AVIOContext *pb, int type, int type2_size)
204 return (type2_size == 32) ? avio_rl32(pb) : avio_rl16(pb);
206 return avio_rl32(pb);
208 return avio_rl64(pb);
210 return avio_rl16(pb);
216 /* MSDN claims that this should be "compatible with the ID3 frame, APIC",
217 * but in reality this is only loosely similar */
218 static int asf_read_picture(AVFormatContext *s, int len)
220 AVPacket pkt = { 0 };
221 const CodecMime *mime = ff_id3v2_mime_tags;
222 enum AVCodecID id = AV_CODEC_ID_NONE;
224 uint8_t *desc = NULL;
226 int ret, type, picsize, desc_len;
228 /* type + picsize + mime + desc */
229 if (len < 1 + 4 + 2 + 2) {
230 av_log(s, AV_LOG_ERROR, "Invalid attached picture size: %d.\n", len);
231 return AVERROR_INVALIDDATA;
235 type = avio_r8(s->pb);
237 if (type >= FF_ARRAY_ELEMS(ff_id3v2_picture_types) || type < 0) {
238 av_log(s, AV_LOG_WARNING, "Unknown attached picture type: %d.\n", type);
242 /* picture data size */
243 picsize = avio_rl32(s->pb);
246 /* picture MIME type */
247 len -= avio_get_str16le(s->pb, len, mimetype, sizeof(mimetype));
248 while (mime->id != AV_CODEC_ID_NONE) {
249 if (!strncmp(mime->str, mimetype, sizeof(mimetype))) {
255 if (id == AV_CODEC_ID_NONE) {
256 av_log(s, AV_LOG_ERROR, "Unknown attached picture mimetype: %s.\n",
261 if (picsize >= len) {
262 av_log(s, AV_LOG_ERROR, "Invalid attached picture data size: %d >= %d.\n",
264 return AVERROR_INVALIDDATA;
267 /* picture description */
268 desc_len = (len - picsize) * 2 + 1;
269 desc = av_malloc(desc_len);
271 return AVERROR(ENOMEM);
272 len -= avio_get_str16le(s->pb, len - picsize, desc, desc_len);
274 ret = av_get_packet(s->pb, &pkt, picsize);
278 st = avformat_new_stream(s, NULL);
280 ret = AVERROR(ENOMEM);
283 st->disposition |= AV_DISPOSITION_ATTACHED_PIC;
284 st->codecpar->codec_type = AVMEDIA_TYPE_VIDEO;
285 st->codecpar->codec_id = id;
286 st->attached_pic = pkt;
287 st->attached_pic.stream_index = st->index;
288 st->attached_pic.flags |= AV_PKT_FLAG_KEY;
291 av_dict_set(&st->metadata, "title", desc, AV_DICT_DONT_STRDUP_VAL);
295 av_dict_set(&st->metadata, "comment", ff_id3v2_picture_types[type], 0);
301 av_packet_unref(&pkt);
305 static void get_id3_tag(AVFormatContext *s, int len)
307 ID3v2ExtraMeta *id3v2_extra_meta = NULL;
309 ff_id3v2_read(s, ID3v2_DEFAULT_MAGIC, &id3v2_extra_meta, len);
310 if (id3v2_extra_meta) {
311 ff_id3v2_parse_apic(s, id3v2_extra_meta);
312 ff_id3v2_parse_chapters(s, id3v2_extra_meta);
314 ff_id3v2_free_extra_meta(&id3v2_extra_meta);
317 static void get_tag(AVFormatContext *s, const char *key, int type, int len, int type2_size)
319 ASFContext *asf = s->priv_data;
321 int64_t off = avio_tell(s->pb);
324 av_assert0((unsigned)len < (INT_MAX - LEN) / 2);
326 if (!asf->export_xmp && !strncmp(key, "xmp", 3))
329 value = av_malloc(2 * len + LEN);
335 avio_get_str16le(s->pb, len, value, 2 * len + 1);
338 avio_read(s->pb, value, len);
342 if (!strcmp(key, "WM/Picture")) { // handle cover art
343 asf_read_picture(s, len);
344 } else if (!strcmp(key, "ID3")) { // handle ID3 tag
347 av_log(s, AV_LOG_VERBOSE, "Unsupported byte array in tag %s.\n", key);
354 uint64_t num = get_value(s->pb, type, type2_size);
355 snprintf(value, LEN, "%"PRIu64, num);
359 av_log(s, AV_LOG_DEBUG, "Unsupported GUID value in tag %s.\n", key);
362 av_log(s, AV_LOG_DEBUG,
363 "Unsupported value type %d in tag %s.\n", type, key);
367 av_dict_set(&s->metadata, key, value, 0);
371 avio_seek(s->pb, off + len, SEEK_SET);
374 static int asf_read_file_properties(AVFormatContext *s, int64_t size)
376 ASFContext *asf = s->priv_data;
377 AVIOContext *pb = s->pb;
379 ff_get_guid(pb, &asf->hdr.guid);
380 asf->hdr.file_size = avio_rl64(pb);
381 asf->hdr.create_time = avio_rl64(pb);
382 avio_rl64(pb); /* number of packets */
383 asf->hdr.play_time = avio_rl64(pb);
384 asf->hdr.send_time = avio_rl64(pb);
385 asf->hdr.preroll = avio_rl32(pb);
386 asf->hdr.ignore = avio_rl32(pb);
387 asf->hdr.flags = avio_rl32(pb);
388 asf->hdr.min_pktsize = avio_rl32(pb);
389 asf->hdr.max_pktsize = avio_rl32(pb);
390 if (asf->hdr.min_pktsize >= (1U << 29))
391 return AVERROR_INVALIDDATA;
392 asf->hdr.max_bitrate = avio_rl32(pb);
393 s->packet_size = asf->hdr.max_pktsize;
398 static int asf_read_stream_properties(AVFormatContext *s, int64_t size)
400 ASFContext *asf = s->priv_data;
401 AVIOContext *pb = s->pb;
405 enum AVMediaType type;
406 int type_specific_size, sizeX;
408 int64_t pos1, pos2, start_time;
409 int test_for_ext_stream_audio, is_dvr_ms_audio = 0;
411 if (s->nb_streams == ASF_MAX_STREAMS) {
412 av_log(s, AV_LOG_ERROR, "too many streams\n");
413 return AVERROR(EINVAL);
416 pos1 = avio_tell(pb);
418 st = avformat_new_stream(s, NULL);
420 return AVERROR(ENOMEM);
421 avpriv_set_pts_info(st, 32, 1, 1000); /* 32 bit pts in ms */
422 start_time = asf->hdr.preroll;
424 if (!(asf->hdr.flags & 0x01)) { // if we aren't streaming...
425 int64_t fsize = avio_size(pb);
426 if (fsize <= 0 || (int64_t)asf->hdr.file_size <= 0 ||
427 20*FFABS(fsize - (int64_t)asf->hdr.file_size) < FFMIN(fsize, asf->hdr.file_size))
428 st->duration = asf->hdr.play_time /
429 (10000000 / 1000) - start_time;
433 test_for_ext_stream_audio = 0;
434 if (!ff_guidcmp(&g, &ff_asf_audio_stream)) {
435 type = AVMEDIA_TYPE_AUDIO;
436 } else if (!ff_guidcmp(&g, &ff_asf_video_stream)) {
437 type = AVMEDIA_TYPE_VIDEO;
438 } else if (!ff_guidcmp(&g, &ff_asf_jfif_media)) {
439 type = AVMEDIA_TYPE_VIDEO;
440 st->codecpar->codec_id = AV_CODEC_ID_MJPEG;
441 } else if (!ff_guidcmp(&g, &ff_asf_command_stream)) {
442 type = AVMEDIA_TYPE_DATA;
443 } else if (!ff_guidcmp(&g, &ff_asf_ext_stream_embed_stream_header)) {
444 test_for_ext_stream_audio = 1;
445 type = AVMEDIA_TYPE_UNKNOWN;
450 avio_skip(pb, 8); /* total_size */
451 type_specific_size = avio_rl32(pb);
453 st->id = avio_rl16(pb) & 0x7f; /* stream id */
454 // mapping of asf ID to AV stream ID;
455 asf->asfid2avid[st->id] = s->nb_streams - 1;
456 asf_st = &asf->streams[st->id];
460 if (test_for_ext_stream_audio) {
462 if (!ff_guidcmp(&g, &ff_asf_ext_stream_audio_stream)) {
463 type = AVMEDIA_TYPE_AUDIO;
474 st->codecpar->codec_type = type;
475 if (type == AVMEDIA_TYPE_AUDIO) {
476 int ret = ff_get_wav_header(s, pb, st->codecpar, type_specific_size, 0);
479 if (is_dvr_ms_audio) {
480 // codec_id and codec_tag are unreliable in dvr_ms
481 // files. Set them later by probing stream.
482 st->request_probe = 1;
483 st->codecpar->codec_tag = 0;
485 if (st->codecpar->codec_id == AV_CODEC_ID_AAC)
486 st->need_parsing = AVSTREAM_PARSE_NONE;
488 st->need_parsing = AVSTREAM_PARSE_FULL;
489 /* We have to init the frame size at some point .... */
490 pos2 = avio_tell(pb);
491 if (size >= (pos2 + 8 - pos1 + 24)) {
492 asf_st->ds_span = avio_r8(pb);
493 asf_st->ds_packet_size = avio_rl16(pb);
494 asf_st->ds_chunk_size = avio_rl16(pb);
495 avio_rl16(pb); // ds_data_size
496 avio_r8(pb); // ds_silence_data
498 if (asf_st->ds_span > 1) {
499 if (!asf_st->ds_chunk_size ||
500 (asf_st->ds_packet_size / asf_st->ds_chunk_size <= 1) ||
501 asf_st->ds_packet_size % asf_st->ds_chunk_size)
502 asf_st->ds_span = 0; // disable descrambling
504 } else if (type == AVMEDIA_TYPE_VIDEO &&
505 size - (avio_tell(pb) - pos1 + 24) >= 51) {
509 avio_rl16(pb); /* size */
510 sizeX = avio_rl32(pb); /* size */
511 st->codecpar->width = avio_rl32(pb);
512 st->codecpar->height = avio_rl32(pb);
513 /* not available for asf */
514 avio_rl16(pb); /* panes */
515 st->codecpar->bits_per_coded_sample = avio_rl16(pb); /* depth */
516 tag1 = avio_rl32(pb);
519 st->codecpar->extradata_size = ffio_limit(pb, sizeX - 40);
520 st->codecpar->extradata = av_mallocz(st->codecpar->extradata_size +
521 AV_INPUT_BUFFER_PADDING_SIZE);
522 if (!st->codecpar->extradata)
523 return AVERROR(ENOMEM);
524 avio_read(pb, st->codecpar->extradata, st->codecpar->extradata_size);
527 /* Extract palette from extradata if bpp <= 8 */
528 /* This code assumes that extradata contains only palette */
529 /* This is true for all paletted codecs implemented in libavcodec */
530 if (st->codecpar->extradata_size && (st->codecpar->bits_per_coded_sample <= 8)) {
533 for (i = 0; i < FFMIN(st->codecpar->extradata_size, AVPALETTE_SIZE) / 4; i++)
534 asf_st->palette[i] = av_bswap32(((uint32_t *)st->codecpar->extradata)[i]);
536 memcpy(asf_st->palette, st->codecpar->extradata,
537 FFMIN(st->codecpar->extradata_size, AVPALETTE_SIZE));
539 asf_st->palette_changed = 1;
542 st->codecpar->codec_tag = tag1;
543 st->codecpar->codec_id = ff_codec_get_id(ff_codec_bmp_tags, tag1);
544 if (tag1 == MKTAG('D', 'V', 'R', ' ')) {
545 st->need_parsing = AVSTREAM_PARSE_FULL;
546 /* issue658 contains wrong w/h and MS even puts a fake seq header
547 * with wrong w/h in extradata while a correct one is in the stream.
548 * maximum lameness */
549 st->codecpar->width =
550 st->codecpar->height = 0;
551 av_freep(&st->codecpar->extradata);
552 st->codecpar->extradata_size = 0;
554 if (st->codecpar->codec_id == AV_CODEC_ID_H264)
555 st->need_parsing = AVSTREAM_PARSE_FULL_ONCE;
556 if (st->codecpar->codec_id == AV_CODEC_ID_MPEG4)
557 st->need_parsing = AVSTREAM_PARSE_FULL_ONCE;
559 pos2 = avio_tell(pb);
560 avio_skip(pb, size - (pos2 - pos1 + 24));
565 static int asf_read_ext_stream_properties(AVFormatContext *s, int64_t size)
567 ASFContext *asf = s->priv_data;
568 AVIOContext *pb = s->pb;
570 int ext_len, payload_ext_ct, stream_ct, i;
571 uint32_t leak_rate, stream_num;
572 unsigned int stream_languageid_index;
574 avio_rl64(pb); // starttime
575 avio_rl64(pb); // endtime
576 leak_rate = avio_rl32(pb); // leak-datarate
577 avio_rl32(pb); // bucket-datasize
578 avio_rl32(pb); // init-bucket-fullness
579 avio_rl32(pb); // alt-leak-datarate
580 avio_rl32(pb); // alt-bucket-datasize
581 avio_rl32(pb); // alt-init-bucket-fullness
582 avio_rl32(pb); // max-object-size
583 avio_rl32(pb); // flags (reliable,seekable,no_cleanpoints?,resend-live-cleanpoints, rest of bits reserved)
584 stream_num = avio_rl16(pb); // stream-num
586 stream_languageid_index = avio_rl16(pb); // stream-language-id-index
587 if (stream_num < 128)
588 asf->streams[stream_num].stream_language_index = stream_languageid_index;
590 avio_rl64(pb); // avg frametime in 100ns units
591 stream_ct = avio_rl16(pb); // stream-name-count
592 payload_ext_ct = avio_rl16(pb); // payload-extension-system-count
594 if (stream_num < 128) {
595 asf->stream_bitrates[stream_num] = leak_rate;
596 asf->streams[stream_num].payload_ext_ct = 0;
599 for (i = 0; i < stream_ct; i++) {
601 ext_len = avio_rl16(pb);
602 avio_skip(pb, ext_len);
605 for (i = 0; i < payload_ext_ct; i++) {
608 size = avio_rl16(pb);
609 ext_len = avio_rl32(pb);
610 avio_skip(pb, ext_len);
611 if (stream_num < 128 && i < FF_ARRAY_ELEMS(asf->streams[stream_num].payload)) {
612 ASFPayload *p = &asf->streams[stream_num].payload[i];
615 av_log(s, AV_LOG_DEBUG, "Payload extension %x %d\n", g[0], p->size );
616 asf->streams[stream_num].payload_ext_ct ++;
623 static int asf_read_content_desc(AVFormatContext *s, int64_t size)
625 AVIOContext *pb = s->pb;
626 int len1, len2, len3, len4, len5;
628 len1 = avio_rl16(pb);
629 len2 = avio_rl16(pb);
630 len3 = avio_rl16(pb);
631 len4 = avio_rl16(pb);
632 len5 = avio_rl16(pb);
633 get_tag(s, "title", 0, len1, 32);
634 get_tag(s, "author", 0, len2, 32);
635 get_tag(s, "copyright", 0, len3, 32);
636 get_tag(s, "comment", 0, len4, 32);
642 static int asf_read_ext_content_desc(AVFormatContext *s, int64_t size)
644 AVIOContext *pb = s->pb;
645 ASFContext *asf = s->priv_data;
646 int desc_count, i, ret;
648 desc_count = avio_rl16(pb);
649 for (i = 0; i < desc_count; i++) {
650 int name_len, value_type, value_len;
653 name_len = avio_rl16(pb);
654 if (name_len % 2) // must be even, broken lavf versions wrote len-1
656 if ((ret = avio_get_str16le(pb, name_len, name, sizeof(name))) < name_len)
657 avio_skip(pb, name_len - ret);
658 value_type = avio_rl16(pb);
659 value_len = avio_rl16(pb);
660 if (!value_type && value_len % 2)
662 /* My sample has that stream set to 0 maybe that mean the container.
663 * ASF stream count starts at 1. I am using 0 to the container value
664 * since it's unused. */
665 if (!strcmp(name, "AspectRatioX"))
666 asf->dar[0].num = get_value(s->pb, value_type, 32);
667 else if (!strcmp(name, "AspectRatioY"))
668 asf->dar[0].den = get_value(s->pb, value_type, 32);
670 get_tag(s, name, value_type, value_len, 32);
676 static int asf_read_language_list(AVFormatContext *s, int64_t size)
678 AVIOContext *pb = s->pb;
679 ASFContext *asf = s->priv_data;
681 int stream_count = avio_rl16(pb);
682 for (j = 0; j < stream_count; j++) {
684 unsigned int lang_len = avio_r8(pb);
685 if ((ret = avio_get_str16le(pb, lang_len, lang,
686 sizeof(lang))) < lang_len)
687 avio_skip(pb, lang_len - ret);
689 av_strlcpy(asf->stream_languages[j], lang,
690 sizeof(*asf->stream_languages));
696 static int asf_read_metadata(AVFormatContext *s, int64_t size)
698 AVIOContext *pb = s->pb;
699 ASFContext *asf = s->priv_data;
700 int n, stream_num, name_len_utf16, name_len_utf8, value_len;
704 for (i = 0; i < n; i++) {
708 avio_rl16(pb); // lang_list_index
709 stream_num = avio_rl16(pb);
710 name_len_utf16 = avio_rl16(pb);
711 value_type = avio_rl16(pb); /* value_type */
712 value_len = avio_rl32(pb);
714 if (value_len < 0 || value_len > UINT16_MAX)
715 return AVERROR_INVALIDDATA;
717 name_len_utf8 = 2*name_len_utf16 + 1;
718 name = av_malloc(name_len_utf8);
720 return AVERROR(ENOMEM);
722 if ((ret = avio_get_str16le(pb, name_len_utf16, name, name_len_utf8)) < name_len_utf16)
723 avio_skip(pb, name_len_utf16 - ret);
724 av_log(s, AV_LOG_TRACE, "%d stream %d name_len %2d type %d len %4d <%s>\n",
725 i, stream_num, name_len_utf16, value_type, value_len, name);
727 if (!strcmp(name, "AspectRatioX")){
728 int aspect_x = get_value(s->pb, value_type, 16);
730 asf->dar[stream_num].num = aspect_x;
731 } else if(!strcmp(name, "AspectRatioY")){
732 int aspect_y = get_value(s->pb, value_type, 16);
734 asf->dar[stream_num].den = aspect_y;
736 get_tag(s, name, value_type, value_len, 16);
744 static int asf_read_marker(AVFormatContext *s, int64_t size)
746 AVIOContext *pb = s->pb;
747 ASFContext *asf = s->priv_data;
748 int i, count, name_len, ret;
751 avio_rl64(pb); // reserved 16 bytes
752 avio_rl64(pb); // ...
753 count = avio_rl32(pb); // markers count
754 avio_rl16(pb); // reserved 2 bytes
755 name_len = avio_rl16(pb); // name length
756 avio_skip(pb, name_len);
758 for (i = 0; i < count; i++) {
763 return AVERROR_INVALIDDATA;
765 avio_rl64(pb); // offset, 8 bytes
766 pres_time = avio_rl64(pb); // presentation time
767 pres_time -= asf->hdr.preroll * 10000;
768 avio_rl16(pb); // entry length
769 avio_rl32(pb); // send time
770 avio_rl32(pb); // flags
771 name_len = avio_rl32(pb); // name length
772 if ((ret = avio_get_str16le(pb, name_len * 2, name,
773 sizeof(name))) < name_len)
774 avio_skip(pb, name_len - ret);
775 avpriv_new_chapter(s, i, (AVRational) { 1, 10000000 }, pres_time,
776 AV_NOPTS_VALUE, name);
782 static int asf_read_header(AVFormatContext *s)
784 ASFContext *asf = s->priv_data;
786 AVIOContext *pb = s->pb;
791 if (ff_guidcmp(&g, &ff_asf_header))
792 return AVERROR_INVALIDDATA;
797 memset(&asf->asfid2avid, -1, sizeof(asf->asfid2avid));
799 for (i = 0; i<128; i++)
800 asf->streams[i].stream_language_index = 128; // invalid stream index means no language info
803 uint64_t gpos = avio_tell(pb);
806 gsize = avio_rl64(pb);
808 if (!ff_guidcmp(&g, &ff_asf_data_header)) {
809 asf->data_object_offset = avio_tell(pb);
810 /* If not streaming, gsize is not unlimited (how?),
811 * and there is enough space in the file.. */
812 if (!(asf->hdr.flags & 0x01) && gsize >= 100)
813 asf->data_object_size = gsize - 24;
815 asf->data_object_size = (uint64_t)-1;
819 return AVERROR_INVALIDDATA;
820 if (!ff_guidcmp(&g, &ff_asf_file_header)) {
821 ret = asf_read_file_properties(s, gsize);
822 } else if (!ff_guidcmp(&g, &ff_asf_stream_header)) {
823 ret = asf_read_stream_properties(s, gsize);
824 } else if (!ff_guidcmp(&g, &ff_asf_comment_header)) {
825 asf_read_content_desc(s, gsize);
826 } else if (!ff_guidcmp(&g, &ff_asf_language_guid)) {
827 asf_read_language_list(s, gsize);
828 } else if (!ff_guidcmp(&g, &ff_asf_extended_content_header)) {
829 asf_read_ext_content_desc(s, gsize);
830 } else if (!ff_guidcmp(&g, &ff_asf_metadata_header)) {
831 asf_read_metadata(s, gsize);
832 } else if (!ff_guidcmp(&g, &ff_asf_metadata_library_header)) {
833 asf_read_metadata(s, gsize);
834 } else if (!ff_guidcmp(&g, &ff_asf_ext_stream_header)) {
835 asf_read_ext_stream_properties(s, gsize);
837 // there could be an optional stream properties object to follow
838 // if so the next iteration will pick it up
840 } else if (!ff_guidcmp(&g, &ff_asf_head1_guid)) {
844 } else if (!ff_guidcmp(&g, &ff_asf_marker_header)) {
845 asf_read_marker(s, gsize);
846 } else if (avio_feof(pb)) {
850 if (!ff_guidcmp(&g, &ff_asf_content_encryption)) {
853 av_log(s, AV_LOG_WARNING,
854 "DRM protected stream detected, decoding will likely fail!\n");
856 av_log(s, AV_LOG_DEBUG, "Secret data:\n");
858 if ((ret = av_get_packet(pb, &pkt, len)) < 0)
860 av_hex_dump_log(s, AV_LOG_DEBUG, pkt.data, pkt.size);
861 av_packet_unref(&pkt);
864 if (len > UINT16_MAX)
865 return AVERROR_INVALIDDATA;
866 get_tag(s, "ASF_Protection_Type", -1, len, 32);
869 if (len > UINT16_MAX)
870 return AVERROR_INVALIDDATA;
871 get_tag(s, "ASF_Key_ID", -1, len, 32);
874 if (len > UINT16_MAX)
875 return AVERROR_INVALIDDATA;
876 get_tag(s, "ASF_License_URL", -1, len, 32);
877 } else if (!ff_guidcmp(&g, &ff_asf_ext_content_encryption)) {
878 av_log(s, AV_LOG_WARNING,
879 "Ext DRM protected stream detected, decoding will likely fail!\n");
880 av_dict_set(&s->metadata, "encryption", "ASF Extended Content Encryption", 0);
881 } else if (!ff_guidcmp(&g, &ff_asf_digital_signature)) {
882 av_log(s, AV_LOG_INFO, "Digital signature detected!\n");
889 if (avio_tell(pb) != gpos + gsize)
890 av_log(s, AV_LOG_DEBUG,
891 "gpos mismatch our pos=%"PRIu64", end=%"PRId64"\n",
892 avio_tell(pb) - gpos, gsize);
893 avio_seek(pb, gpos + gsize, SEEK_SET);
901 asf->data_offset = avio_tell(pb);
902 asf->packet_size_left = 0;
904 for (i = 0; i < 128; i++) {
905 int stream_num = asf->asfid2avid[i];
906 if (stream_num >= 0) {
907 AVStream *st = s->streams[stream_num];
908 if (!st->codecpar->bit_rate)
909 st->codecpar->bit_rate = asf->stream_bitrates[i];
910 if (asf->dar[i].num > 0 && asf->dar[i].den > 0) {
911 av_reduce(&st->sample_aspect_ratio.num,
912 &st->sample_aspect_ratio.den,
913 asf->dar[i].num, asf->dar[i].den, INT_MAX);
914 } else if ((asf->dar[0].num > 0) && (asf->dar[0].den > 0) &&
915 // Use ASF container value if the stream doesn't set AR.
916 (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO))
917 av_reduce(&st->sample_aspect_ratio.num,
918 &st->sample_aspect_ratio.den,
919 asf->dar[0].num, asf->dar[0].den, INT_MAX);
921 av_log(s, AV_LOG_TRACE, "i=%d, st->codecpar->codec_type:%d, asf->dar %d:%d sar=%d:%d\n",
922 i, st->codecpar->codec_type, asf->dar[i].num, asf->dar[i].den,
923 st->sample_aspect_ratio.num, st->sample_aspect_ratio.den);
925 // copy and convert language codes to the frontend
926 if (asf->streams[i].stream_language_index < 128) {
927 const char *rfc1766 = asf->stream_languages[asf->streams[i].stream_language_index];
928 if (rfc1766 && strlen(rfc1766) > 1) {
929 const char primary_tag[3] = { rfc1766[0], rfc1766[1], '\0' }; // ignore country code if any
930 const char *iso6392 = ff_convert_lang_to(primary_tag,
931 AV_LANG_ISO639_2_BIBL);
933 av_dict_set(&st->metadata, "language", iso6392, 0);
939 ff_metadata_conv(&s->metadata, NULL, ff_asf_metadata_conv);
944 #define DO_2BITS(bits, var, defval) \
945 switch (bits & 3) { \
947 var = avio_rl32(pb); \
951 var = avio_rl16(pb); \
964 * Load a single ASF packet into the demuxer.
965 * @param s demux context
966 * @param pb context to read data from
967 * @return 0 on success, <0 on error
969 static int asf_get_packet(AVFormatContext *s, AVIOContext *pb)
971 ASFContext *asf = s->priv_data;
972 uint32_t packet_length, padsize;
976 if (asf->uses_std_ecc > 0) {
977 // if we do not know packet size, allow skipping up to 32 kB
979 if (asf->no_resync_search)
981 // else if (s->packet_size > 0 && !asf->uses_std_ecc)
982 // off = (avio_tell(pb) - s->internal->data_offset) % s->packet_size + 3;
989 if (c == 0x82 && !d && !e)
994 /* This code allows handling of -EAGAIN at packet boundaries (i.e.
995 * if the packet sync code above triggers -EAGAIN). This does not
996 * imply complete -EAGAIN handling support at random positions in
998 if (pb->error == AVERROR(EAGAIN))
999 return AVERROR(EAGAIN);
1001 av_log(s, AV_LOG_ERROR,
1002 "ff asf bad header %x at:%"PRId64"\n", c, avio_tell(pb));
1004 if ((c & 0x8f) == 0x82) {
1007 av_log(s, AV_LOG_ERROR, "ff asf bad non zero\n");
1008 return AVERROR_INVALIDDATA;
1013 } else if(!avio_feof(pb)) {
1014 avio_seek(pb, -1, SEEK_CUR); // FIXME
1023 avio_seek(pb, (c & 0xF) - 2, SEEK_CUR);
1028 avpriv_request_sample(s, "Invalid ECC byte");
1030 if (!asf->uses_std_ecc)
1031 asf->uses_std_ecc = (c == 0x82 && !d && !e) ? 1 : -1;
1035 asf->uses_std_ecc = -1;
1039 asf->packet_flags = c;
1040 asf->packet_property = d;
1042 DO_2BITS(asf->packet_flags >> 5, packet_length, s->packet_size);
1043 DO_2BITS(asf->packet_flags >> 1, padsize, 0); // sequence ignored
1044 DO_2BITS(asf->packet_flags >> 3, padsize, 0); // padding length
1046 // the following checks prevent overflows and infinite loops
1047 if (!packet_length || packet_length >= (1U << 29)) {
1048 av_log(s, AV_LOG_ERROR,
1049 "invalid packet_length %"PRIu32" at:%"PRId64"\n",
1050 packet_length, avio_tell(pb));
1051 return AVERROR_INVALIDDATA;
1053 if (padsize >= packet_length) {
1054 av_log(s, AV_LOG_ERROR,
1055 "invalid padsize %"PRIu32" at:%"PRId64"\n", padsize, avio_tell(pb));
1056 return AVERROR_INVALIDDATA;
1059 asf->packet_timestamp = avio_rl32(pb);
1060 avio_rl16(pb); /* duration */
1061 // rsize has at least 11 bytes which have to be present
1063 if (asf->packet_flags & 0x01) {
1064 asf->packet_segsizetype = avio_r8(pb);
1066 asf->packet_segments = asf->packet_segsizetype & 0x3f;
1068 asf->packet_segments = 1;
1069 asf->packet_segsizetype = 0x80;
1071 if (rsize > packet_length - padsize) {
1072 asf->packet_size_left = 0;
1073 av_log(s, AV_LOG_ERROR,
1074 "invalid packet header length %d for pktlen %"PRIu32"-%"PRIu32" at %"PRId64"\n",
1075 rsize, packet_length, padsize, avio_tell(pb));
1076 return AVERROR_INVALIDDATA;
1078 asf->packet_size_left = packet_length - padsize - rsize;
1079 if (packet_length < asf->hdr.min_pktsize)
1080 padsize += asf->hdr.min_pktsize - packet_length;
1081 asf->packet_padsize = padsize;
1082 av_log(s, AV_LOG_TRACE, "packet: size=%d padsize=%d left=%d\n",
1083 s->packet_size, asf->packet_padsize, asf->packet_size_left);
1089 * @return <0 if error
1091 static int asf_read_frame_header(AVFormatContext *s, AVIOContext *pb)
1093 ASFContext *asf = s->priv_data;
1096 int num = avio_r8(pb);
1098 int64_t ts0, ts1 av_unused;
1100 asf->packet_segments--;
1101 asf->packet_key_frame = num >> 7;
1102 asf->stream_index = asf->asfid2avid[num & 0x7f];
1103 asfst = &asf->streams[num & 0x7f];
1104 // sequence should be ignored!
1105 DO_2BITS(asf->packet_property >> 4, asf->packet_seq, 0);
1106 DO_2BITS(asf->packet_property >> 2, asf->packet_frag_offset, 0);
1107 DO_2BITS(asf->packet_property, asf->packet_replic_size, 0);
1108 av_log(asf, AV_LOG_TRACE, "key:%d stream:%d seq:%d offset:%d replic_size:%d num:%X packet_property %X\n",
1109 asf->packet_key_frame, asf->stream_index, asf->packet_seq,
1110 asf->packet_frag_offset, asf->packet_replic_size, num, asf->packet_property);
1111 if (rsize+(int64_t)asf->packet_replic_size > asf->packet_size_left) {
1112 av_log(s, AV_LOG_ERROR, "packet_replic_size %d is invalid\n", asf->packet_replic_size);
1113 return AVERROR_INVALIDDATA;
1115 if (asf->packet_replic_size >= 8) {
1116 int64_t end = avio_tell(pb) + asf->packet_replic_size;
1118 asfst->packet_obj_size = avio_rl32(pb);
1119 if (asfst->packet_obj_size >= (1 << 24) || asfst->packet_obj_size < 0) {
1120 av_log(s, AV_LOG_ERROR, "packet_obj_size %d invalid\n", asfst->packet_obj_size);
1121 asfst->packet_obj_size = 0;
1122 return AVERROR_INVALIDDATA;
1124 asf->packet_frag_timestamp = avio_rl32(pb); // timestamp
1126 for (i = 0; i < asfst->payload_ext_ct; i++) {
1127 ASFPayload *p = &asfst->payload[i];
1131 size = avio_rl16(pb);
1132 payend = avio_tell(pb) + size;
1134 av_log(s, AV_LOG_ERROR, "too long payload\n");
1139 // duration = avio_rl16(pb);
1142 aspect.num = avio_r8(pb);
1143 aspect.den = avio_r8(pb);
1144 if (aspect.num > 0 && aspect.den > 0 && asf->stream_index >= 0) {
1145 s->streams[asf->stream_index]->sample_aspect_ratio = aspect;
1150 ts0 = avio_rl64(pb);
1151 ts1 = avio_rl64(pb);
1152 if (ts0!= -1) asf->packet_frag_timestamp = ts0/10000;
1153 else asf->packet_frag_timestamp = AV_NOPTS_VALUE;
1164 avio_seek(pb, payend, SEEK_SET);
1167 avio_seek(pb, end, SEEK_SET);
1168 rsize += asf->packet_replic_size; // FIXME - check validity
1169 } else if (asf->packet_replic_size == 1) {
1170 // multipacket - frag_offset is beginning timestamp
1171 asf->packet_time_start = asf->packet_frag_offset;
1172 asf->packet_frag_offset = 0;
1173 asf->packet_frag_timestamp = asf->packet_timestamp;
1175 asf->packet_time_delta = avio_r8(pb);
1177 } else if (asf->packet_replic_size != 0) {
1178 av_log(s, AV_LOG_ERROR, "unexpected packet_replic_size of %d\n",
1179 asf->packet_replic_size);
1180 return AVERROR_INVALIDDATA;
1182 if (asf->packet_flags & 0x01) {
1183 DO_2BITS(asf->packet_segsizetype >> 6, asf->packet_frag_size, 0); // 0 is illegal
1184 if (rsize > asf->packet_size_left) {
1185 av_log(s, AV_LOG_ERROR, "packet_replic_size is invalid\n");
1186 return AVERROR_INVALIDDATA;
1187 } else if (asf->packet_frag_size > asf->packet_size_left - rsize) {
1188 if (asf->packet_frag_size > asf->packet_size_left - rsize + asf->packet_padsize) {
1189 av_log(s, AV_LOG_ERROR, "packet_frag_size is invalid (%d>%d-%d+%d)\n",
1190 asf->packet_frag_size, asf->packet_size_left, rsize, asf->packet_padsize);
1191 return AVERROR_INVALIDDATA;
1193 int diff = asf->packet_frag_size - (asf->packet_size_left - rsize);
1194 asf->packet_size_left += diff;
1195 asf->packet_padsize -= diff;
1199 asf->packet_frag_size = asf->packet_size_left - rsize;
1201 if (asf->packet_replic_size == 1) {
1202 asf->packet_multi_size = asf->packet_frag_size;
1203 if (asf->packet_multi_size > asf->packet_size_left)
1204 return AVERROR_INVALIDDATA;
1206 asf->packet_size_left -= rsize;
1212 * Parse data from individual ASF packets (which were previously loaded
1213 * with asf_get_packet()).
1214 * @param s demux context
1215 * @param pb context to read data from
1216 * @param pkt pointer to store packet data into
1217 * @return 0 if data was stored in pkt, <0 on error or 1 if more ASF
1218 * packets need to be loaded (through asf_get_packet())
1220 static int asf_parse_packet(AVFormatContext *s, AVIOContext *pb, AVPacket *pkt)
1222 ASFContext *asf = s->priv_data;
1223 ASFStream *asf_st = 0;
1228 if (asf->packet_size_left < FRAME_HEADER_SIZE ||
1229 asf->packet_segments < 1 && asf->packet_time_start == 0) {
1230 int ret = asf->packet_size_left + asf->packet_padsize;
1232 if (asf->packet_size_left && asf->packet_size_left < FRAME_HEADER_SIZE)
1233 av_log(s, AV_LOG_WARNING, "Skip due to FRAME_HEADER_SIZE\n");
1239 asf->packet_pos = avio_tell(pb);
1240 if (asf->data_object_size != (uint64_t)-1 &&
1241 (asf->packet_pos - asf->data_object_offset >= asf->data_object_size))
1242 return AVERROR_EOF; /* Do not exceed the size of the data object */
1245 if (asf->packet_time_start == 0) {
1246 if (asf_read_frame_header(s, pb) < 0) {
1247 asf->packet_time_start = asf->packet_segments = 0;
1250 if (asf->stream_index < 0 ||
1251 s->streams[asf->stream_index]->discard >= AVDISCARD_ALL ||
1252 (!asf->packet_key_frame &&
1253 (s->streams[asf->stream_index]->discard >= AVDISCARD_NONKEY || asf->streams[s->streams[asf->stream_index]->id].skip_to_key))) {
1254 asf->packet_time_start = 0;
1255 /* unhandled packet (should not happen) */
1256 avio_skip(pb, asf->packet_frag_size);
1257 asf->packet_size_left -= asf->packet_frag_size;
1258 if (asf->stream_index < 0)
1259 av_log(s, AV_LOG_ERROR, "ff asf skip %d (unknown stream)\n",
1260 asf->packet_frag_size);
1263 asf->asf_st = &asf->streams[s->streams[asf->stream_index]->id];
1264 if (!asf->packet_frag_offset)
1265 asf->asf_st->skip_to_key = 0;
1267 asf_st = asf->asf_st;
1270 if (!asf_st->frag_offset && asf->packet_frag_offset) {
1271 av_log(s, AV_LOG_TRACE, "skipping asf data pkt with fragment offset for "
1272 "stream:%d, expected:%d but got %d from pkt)\n",
1273 asf->stream_index, asf_st->frag_offset,
1274 asf->packet_frag_offset);
1275 avio_skip(pb, asf->packet_frag_size);
1276 asf->packet_size_left -= asf->packet_frag_size;
1280 if (asf->packet_replic_size == 1) {
1281 // frag_offset is here used as the beginning timestamp
1282 asf->packet_frag_timestamp = asf->packet_time_start;
1283 asf->packet_time_start += asf->packet_time_delta;
1284 asf_st->packet_obj_size = asf->packet_frag_size = avio_r8(pb);
1285 asf->packet_size_left--;
1286 asf->packet_multi_size--;
1287 if (asf->packet_multi_size < asf_st->packet_obj_size) {
1288 asf->packet_time_start = 0;
1289 avio_skip(pb, asf->packet_multi_size);
1290 asf->packet_size_left -= asf->packet_multi_size;
1293 asf->packet_multi_size -= asf_st->packet_obj_size;
1296 if (asf_st->pkt.size != asf_st->packet_obj_size ||
1297 // FIXME is this condition sufficient?
1298 asf_st->frag_offset + asf->packet_frag_size > asf_st->pkt.size) {
1301 if (asf_st->pkt.data) {
1302 av_log(s, AV_LOG_INFO,
1303 "freeing incomplete packet size %d, new %d\n",
1304 asf_st->pkt.size, asf_st->packet_obj_size);
1305 asf_st->frag_offset = 0;
1306 av_packet_unref(&asf_st->pkt);
1309 if ((ret = av_new_packet(&asf_st->pkt, asf_st->packet_obj_size)) < 0)
1311 asf_st->seq = asf->packet_seq;
1312 if (asf->ts_is_pts) {
1313 asf_st->pkt.pts = asf->packet_frag_timestamp - asf->hdr.preroll;
1315 asf_st->pkt.dts = asf->packet_frag_timestamp - asf->hdr.preroll;
1316 asf_st->pkt.stream_index = asf->stream_index;
1317 asf_st->pkt.pos = asf_st->packet_pos = asf->packet_pos;
1318 asf_st->pkt_clean = 0;
1320 if (asf_st->pkt.data && asf_st->palette_changed) {
1322 pal = av_packet_new_side_data(&asf_st->pkt, AV_PKT_DATA_PALETTE,
1325 av_log(s, AV_LOG_ERROR, "Cannot append palette to packet\n");
1327 memcpy(pal, asf_st->palette, AVPALETTE_SIZE);
1328 asf_st->palette_changed = 0;
1331 av_log(asf, AV_LOG_TRACE, "new packet: stream:%d key:%d packet_key:%d audio:%d size:%d\n",
1332 asf->stream_index, asf->packet_key_frame,
1333 asf_st->pkt.flags & AV_PKT_FLAG_KEY,
1334 s->streams[asf->stream_index]->codecpar->codec_type == AVMEDIA_TYPE_AUDIO,
1335 asf_st->packet_obj_size);
1336 if (s->streams[asf->stream_index]->codecpar->codec_type == AVMEDIA_TYPE_AUDIO)
1337 asf->packet_key_frame = 1;
1338 if (asf->packet_key_frame)
1339 asf_st->pkt.flags |= AV_PKT_FLAG_KEY;
1343 av_log(asf, AV_LOG_TRACE, "READ PACKET s:%d os:%d o:%d,%d l:%d DATA:%p\n",
1344 s->packet_size, asf_st->pkt.size, asf->packet_frag_offset,
1345 asf_st->frag_offset, asf->packet_frag_size, asf_st->pkt.data);
1346 asf->packet_size_left -= asf->packet_frag_size;
1347 if (asf->packet_size_left < 0)
1350 if (asf->packet_frag_offset >= asf_st->pkt.size ||
1351 asf->packet_frag_size > asf_st->pkt.size - asf->packet_frag_offset) {
1352 av_log(s, AV_LOG_ERROR,
1353 "packet fragment position invalid %u,%u not in %u\n",
1354 asf->packet_frag_offset, asf->packet_frag_size,
1359 if (asf->packet_frag_offset != asf_st->frag_offset && !asf_st->pkt_clean) {
1360 memset(asf_st->pkt.data + asf_st->frag_offset, 0, asf_st->pkt.size - asf_st->frag_offset);
1361 asf_st->pkt_clean = 1;
1364 ret = avio_read(pb, asf_st->pkt.data + asf->packet_frag_offset,
1365 asf->packet_frag_size);
1366 if (ret != asf->packet_frag_size) {
1367 if (ret < 0 || asf->packet_frag_offset + ret == 0)
1368 return ret < 0 ? ret : AVERROR_EOF;
1370 if (asf_st->ds_span > 1) {
1371 // scrambling, we can either drop it completely or fill the remainder
1372 // TODO: should we fill the whole packet instead of just the current
1374 memset(asf_st->pkt.data + asf->packet_frag_offset + ret, 0,
1375 asf->packet_frag_size - ret);
1376 ret = asf->packet_frag_size;
1378 // no scrambling, so we can return partial packets
1379 av_shrink_packet(&asf_st->pkt, asf->packet_frag_offset + ret);
1382 if (s->key && s->keylen == 20)
1383 ff_asfcrypt_dec(s->key, asf_st->pkt.data + asf->packet_frag_offset,
1385 asf_st->frag_offset += ret;
1386 /* test if whole packet is read */
1387 if (asf_st->frag_offset == asf_st->pkt.size) {
1388 // workaround for macroshit radio DVR-MS files
1389 if (s->streams[asf->stream_index]->codecpar->codec_id == AV_CODEC_ID_MPEG2VIDEO &&
1390 asf_st->pkt.size > 100) {
1392 for (i = 0; i < asf_st->pkt.size && !asf_st->pkt.data[i]; i++)
1394 if (i == asf_st->pkt.size) {
1395 av_log(s, AV_LOG_DEBUG, "discarding ms fart\n");
1396 asf_st->frag_offset = 0;
1397 av_packet_unref(&asf_st->pkt);
1403 if (asf_st->ds_span > 1) {
1404 if (asf_st->pkt.size != asf_st->ds_packet_size * asf_st->ds_span) {
1405 av_log(s, AV_LOG_ERROR,
1406 "pkt.size != ds_packet_size * ds_span (%d %d %d)\n",
1407 asf_st->pkt.size, asf_st->ds_packet_size,
1410 /* packet descrambling */
1411 AVBufferRef *buf = av_buffer_alloc(asf_st->pkt.size +
1412 AV_INPUT_BUFFER_PADDING_SIZE);
1414 uint8_t *newdata = buf->data;
1416 memset(newdata + asf_st->pkt.size, 0,
1417 AV_INPUT_BUFFER_PADDING_SIZE);
1418 while (offset < asf_st->pkt.size) {
1419 int off = offset / asf_st->ds_chunk_size;
1420 int row = off / asf_st->ds_span;
1421 int col = off % asf_st->ds_span;
1422 int idx = row + col * asf_st->ds_packet_size / asf_st->ds_chunk_size;
1423 assert(offset + asf_st->ds_chunk_size <= asf_st->pkt.size);
1424 assert(idx + 1 <= asf_st->pkt.size / asf_st->ds_chunk_size);
1425 memcpy(newdata + offset,
1426 asf_st->pkt.data + idx * asf_st->ds_chunk_size,
1427 asf_st->ds_chunk_size);
1428 offset += asf_st->ds_chunk_size;
1430 av_buffer_unref(&asf_st->pkt.buf);
1431 asf_st->pkt.buf = buf;
1432 asf_st->pkt.data = buf->data;
1436 asf_st->frag_offset = 0;
1438 asf_st->pkt.buf = 0;
1439 asf_st->pkt.size = 0;
1440 asf_st->pkt.data = 0;
1441 asf_st->pkt.side_data_elems = 0;
1442 asf_st->pkt.side_data = NULL;
1443 break; // packet completed
1449 static int asf_read_packet(AVFormatContext *s, AVPacket *pkt)
1451 ASFContext *asf = s->priv_data;
1456 /* parse cached packets, if any */
1457 if ((ret = asf_parse_packet(s, s->pb, pkt)) <= 0)
1459 if ((ret = asf_get_packet(s, s->pb)) < 0)
1460 assert(asf->packet_size_left < FRAME_HEADER_SIZE ||
1461 asf->packet_segments < 1);
1462 asf->packet_time_start = 0;
1466 // Added to support seeking after packets have been read
1467 // If information is not reset, read_packet fails due to
1468 // leftover information from previous reads
1469 static void asf_reset_header(AVFormatContext *s)
1471 ASFContext *asf = s->priv_data;
1475 asf->packet_size_left = 0;
1476 asf->packet_flags = 0;
1477 asf->packet_property = 0;
1478 asf->packet_timestamp = 0;
1479 asf->packet_segsizetype = 0;
1480 asf->packet_segments = 0;
1481 asf->packet_seq = 0;
1482 asf->packet_replic_size = 0;
1483 asf->packet_key_frame = 0;
1484 asf->packet_padsize = 0;
1485 asf->packet_frag_offset = 0;
1486 asf->packet_frag_size = 0;
1487 asf->packet_frag_timestamp = 0;
1488 asf->packet_multi_size = 0;
1489 asf->packet_time_delta = 0;
1490 asf->packet_time_start = 0;
1492 for (i = 0; i < 128; i++) {
1493 asf_st = &asf->streams[i];
1494 av_packet_unref(&asf_st->pkt);
1495 asf_st->packet_obj_size = 0;
1496 asf_st->frag_offset = 0;
1502 static void skip_to_key(AVFormatContext *s)
1504 ASFContext *asf = s->priv_data;
1507 for (i = 0; i < 128; i++) {
1508 int j = asf->asfid2avid[i];
1509 ASFStream *asf_st = &asf->streams[i];
1510 if (j < 0 || s->streams[j]->codecpar->codec_type != AVMEDIA_TYPE_VIDEO)
1513 asf_st->skip_to_key = 1;
1517 static int asf_read_close(AVFormatContext *s)
1519 asf_reset_header(s);
1524 static int64_t asf_read_pts(AVFormatContext *s, int stream_index,
1525 int64_t *ppos, int64_t pos_limit)
1527 ASFContext *asf = s->priv_data;
1528 AVPacket pkt1, *pkt = &pkt1;
1531 int64_t pos = *ppos;
1533 int64_t start_pos[ASF_MAX_STREAMS];
1535 for (i = 0; i < s->nb_streams; i++)
1538 if (s->packet_size > 0)
1539 pos = (pos + s->packet_size - 1 - s->internal->data_offset) /
1540 s->packet_size * s->packet_size +
1541 s->internal->data_offset;
1543 if (avio_seek(s->pb, pos, SEEK_SET) < 0)
1544 return AV_NOPTS_VALUE;
1546 ff_read_frame_flush(s);
1547 asf_reset_header(s);
1549 if (av_read_frame(s, pkt) < 0) {
1550 av_log(s, AV_LOG_INFO, "asf_read_pts failed\n");
1551 return AV_NOPTS_VALUE;
1556 if (pkt->flags & AV_PKT_FLAG_KEY) {
1557 i = pkt->stream_index;
1559 asf_st = &asf->streams[s->streams[i]->id];
1561 // assert((asf_st->packet_pos - s->data_offset) % s->packet_size == 0);
1562 pos = asf_st->packet_pos;
1563 av_assert1(pkt->pos == asf_st->packet_pos);
1565 av_add_index_entry(s->streams[i], pos, pts, pkt->size,
1566 pos - start_pos[i] + 1, AVINDEX_KEYFRAME);
1567 start_pos[i] = asf_st->packet_pos + 1;
1569 if (pkt->stream_index == stream_index) {
1570 av_packet_unref(pkt);
1574 av_packet_unref(pkt);
1581 static int asf_build_simple_index(AVFormatContext *s, int stream_index)
1584 ASFContext *asf = s->priv_data;
1585 int64_t current_pos = avio_tell(s->pb);
1588 if((ret = avio_seek(s->pb, asf->data_object_offset + asf->data_object_size, SEEK_SET)) < 0) {
1592 if ((ret = ff_get_guid(s->pb, &g)) < 0)
1595 /* the data object can be followed by other top-level objects,
1596 * skip them until the simple index object is reached */
1597 while (ff_guidcmp(&g, &ff_asf_simple_index_header)) {
1598 int64_t gsize = avio_rl64(s->pb);
1599 if (gsize < 24 || avio_feof(s->pb)) {
1602 avio_skip(s->pb, gsize - 24);
1603 if ((ret = ff_get_guid(s->pb, &g)) < 0)
1608 int64_t itime, last_pos = -1;
1611 int64_t av_unused gsize = avio_rl64(s->pb);
1612 if ((ret = ff_get_guid(s->pb, &g)) < 0)
1614 itime = avio_rl64(s->pb);
1615 pct = avio_rl32(s->pb);
1616 ict = avio_rl32(s->pb);
1617 av_log(s, AV_LOG_DEBUG,
1618 "itime:0x%"PRIx64", pct:%d, ict:%d\n", itime, pct, ict);
1620 for (i = 0; i < ict; i++) {
1621 int pktnum = avio_rl32(s->pb);
1622 int pktct = avio_rl16(s->pb);
1623 int64_t pos = s->internal->data_offset + s->packet_size * (int64_t)pktnum;
1624 int64_t index_pts = FFMAX(av_rescale(itime, i, 10000) - asf->hdr.preroll, 0);
1626 if (avio_feof(s->pb)) {
1627 ret = AVERROR_INVALIDDATA;
1631 if (pos != last_pos) {
1632 av_log(s, AV_LOG_DEBUG, "pktnum:%d, pktct:%d pts: %"PRId64"\n",
1633 pktnum, pktct, index_pts);
1634 av_add_index_entry(s->streams[stream_index], pos, index_pts,
1635 s->packet_size, 0, AVINDEX_KEYFRAME);
1639 asf->index_read = ict > 1;
1642 // if (avio_feof(s->pb)) {
1645 avio_seek(s->pb, current_pos, SEEK_SET);
1649 static int asf_read_seek(AVFormatContext *s, int stream_index,
1650 int64_t pts, int flags)
1652 ASFContext *asf = s->priv_data;
1653 AVStream *st = s->streams[stream_index];
1656 if (s->packet_size <= 0)
1659 /* Try using the protocol's read_seek if available */
1661 int64_t ret = avio_seek_time(s->pb, stream_index, pts, flags);
1663 asf_reset_header(s);
1664 if (ret != AVERROR(ENOSYS))
1668 /* explicitly handle the case of seeking to 0 */
1670 asf_reset_header(s);
1671 avio_seek(s->pb, s->internal->data_offset, SEEK_SET);
1675 if (!asf->index_read) {
1676 ret = asf_build_simple_index(s, stream_index);
1678 asf->index_read = -1;
1681 if (asf->index_read > 0 && st->index_entries) {
1682 int index = av_index_search_timestamp(st, pts, flags);
1684 /* find the position */
1685 uint64_t pos = st->index_entries[index].pos;
1688 av_log(s, AV_LOG_DEBUG, "SEEKTO: %"PRId64"\n", pos);
1689 if(avio_seek(s->pb, pos, SEEK_SET) < 0)
1691 asf_reset_header(s);
1696 /* no index or seeking by index failed */
1697 if (ff_seek_frame_binary(s, stream_index, pts, flags) < 0)
1699 asf_reset_header(s);
1704 AVInputFormat ff_asf_demuxer = {
1706 .long_name = NULL_IF_CONFIG_SMALL("ASF (Advanced / Active Streaming Format)"),
1707 .priv_data_size = sizeof(ASFContext),
1708 .read_probe = asf_probe,
1709 .read_header = asf_read_header,
1710 .read_packet = asf_read_packet,
1711 .read_close = asf_read_close,
1712 .read_seek = asf_read_seek,
1713 .read_timestamp = asf_read_pts,
1714 .flags = AVFMT_NOBINSEARCH | AVFMT_NOGENSEARCH,
1715 .priv_class = &asf_class,