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 if ((unsigned)len >= (UINT_MAX - LEN) / 2)
327 if (!asf->export_xmp && !strncmp(key, "xmp", 3))
330 value = av_malloc(2 * len + LEN);
336 avio_get_str16le(s->pb, len, value, 2 * len + 1);
339 avio_read(s->pb, value, len);
343 if (!strcmp(key, "WM/Picture")) { // handle cover art
344 asf_read_picture(s, len);
345 } else if (!strcmp(key, "ID3")) { // handle ID3 tag
348 av_log(s, AV_LOG_VERBOSE, "Unsupported byte array in tag %s.\n", key);
355 uint64_t num = get_value(s->pb, type, type2_size);
356 snprintf(value, LEN, "%"PRIu64, num);
360 av_log(s, AV_LOG_DEBUG, "Unsupported GUID value in tag %s.\n", key);
363 av_log(s, AV_LOG_DEBUG,
364 "Unsupported value type %d in tag %s.\n", type, key);
368 av_dict_set(&s->metadata, key, value, 0);
372 avio_seek(s->pb, off + len, SEEK_SET);
375 static int asf_read_file_properties(AVFormatContext *s, int64_t size)
377 ASFContext *asf = s->priv_data;
378 AVIOContext *pb = s->pb;
380 ff_get_guid(pb, &asf->hdr.guid);
381 asf->hdr.file_size = avio_rl64(pb);
382 asf->hdr.create_time = avio_rl64(pb);
383 avio_rl64(pb); /* number of packets */
384 asf->hdr.play_time = avio_rl64(pb);
385 asf->hdr.send_time = avio_rl64(pb);
386 asf->hdr.preroll = avio_rl32(pb);
387 asf->hdr.ignore = avio_rl32(pb);
388 asf->hdr.flags = avio_rl32(pb);
389 asf->hdr.min_pktsize = avio_rl32(pb);
390 asf->hdr.max_pktsize = avio_rl32(pb);
391 if (asf->hdr.min_pktsize >= (1U << 29))
392 return AVERROR_INVALIDDATA;
393 asf->hdr.max_bitrate = avio_rl32(pb);
394 s->packet_size = asf->hdr.max_pktsize;
399 static int asf_read_stream_properties(AVFormatContext *s, int64_t size)
401 ASFContext *asf = s->priv_data;
402 AVIOContext *pb = s->pb;
406 enum AVMediaType type;
407 int type_specific_size, sizeX;
409 int64_t pos1, pos2, start_time;
410 int test_for_ext_stream_audio, is_dvr_ms_audio = 0;
412 if (s->nb_streams == ASF_MAX_STREAMS) {
413 av_log(s, AV_LOG_ERROR, "too many streams\n");
414 return AVERROR(EINVAL);
417 pos1 = avio_tell(pb);
419 st = avformat_new_stream(s, NULL);
421 return AVERROR(ENOMEM);
422 avpriv_set_pts_info(st, 32, 1, 1000); /* 32 bit pts in ms */
423 start_time = asf->hdr.preroll;
425 if (!(asf->hdr.flags & 0x01)) { // if we aren't streaming...
426 int64_t fsize = avio_size(pb);
427 if (fsize <= 0 || (int64_t)asf->hdr.file_size <= 0 ||
428 20*FFABS(fsize - (int64_t)asf->hdr.file_size) < FFMIN(fsize, asf->hdr.file_size))
429 st->duration = asf->hdr.play_time /
430 (10000000 / 1000) - start_time;
434 test_for_ext_stream_audio = 0;
435 if (!ff_guidcmp(&g, &ff_asf_audio_stream)) {
436 type = AVMEDIA_TYPE_AUDIO;
437 } else if (!ff_guidcmp(&g, &ff_asf_video_stream)) {
438 type = AVMEDIA_TYPE_VIDEO;
439 } else if (!ff_guidcmp(&g, &ff_asf_jfif_media)) {
440 type = AVMEDIA_TYPE_VIDEO;
441 st->codecpar->codec_id = AV_CODEC_ID_MJPEG;
442 } else if (!ff_guidcmp(&g, &ff_asf_command_stream)) {
443 type = AVMEDIA_TYPE_DATA;
444 } else if (!ff_guidcmp(&g, &ff_asf_ext_stream_embed_stream_header)) {
445 test_for_ext_stream_audio = 1;
446 type = AVMEDIA_TYPE_UNKNOWN;
451 avio_skip(pb, 8); /* total_size */
452 type_specific_size = avio_rl32(pb);
454 st->id = avio_rl16(pb) & 0x7f; /* stream id */
455 // mapping of asf ID to AV stream ID;
456 asf->asfid2avid[st->id] = s->nb_streams - 1;
457 asf_st = &asf->streams[st->id];
461 if (test_for_ext_stream_audio) {
463 if (!ff_guidcmp(&g, &ff_asf_ext_stream_audio_stream)) {
464 type = AVMEDIA_TYPE_AUDIO;
475 st->codecpar->codec_type = type;
476 if (type == AVMEDIA_TYPE_AUDIO) {
477 int ret = ff_get_wav_header(s, pb, st->codecpar, type_specific_size, 0);
480 if (is_dvr_ms_audio) {
481 // codec_id and codec_tag are unreliable in dvr_ms
482 // files. Set them later by probing stream.
483 st->request_probe = 1;
484 st->codecpar->codec_tag = 0;
486 if (st->codecpar->codec_id == AV_CODEC_ID_AAC)
487 st->need_parsing = AVSTREAM_PARSE_NONE;
489 st->need_parsing = AVSTREAM_PARSE_FULL;
490 /* We have to init the frame size at some point .... */
491 pos2 = avio_tell(pb);
492 if (size >= (pos2 + 8 - pos1 + 24)) {
493 asf_st->ds_span = avio_r8(pb);
494 asf_st->ds_packet_size = avio_rl16(pb);
495 asf_st->ds_chunk_size = avio_rl16(pb);
496 avio_rl16(pb); // ds_data_size
497 avio_r8(pb); // ds_silence_data
499 if (asf_st->ds_span > 1) {
500 if (!asf_st->ds_chunk_size ||
501 (asf_st->ds_packet_size / asf_st->ds_chunk_size <= 1) ||
502 asf_st->ds_packet_size % asf_st->ds_chunk_size)
503 asf_st->ds_span = 0; // disable descrambling
505 } else if (type == AVMEDIA_TYPE_VIDEO &&
506 size - (avio_tell(pb) - pos1 + 24) >= 51) {
510 avio_rl16(pb); /* size */
511 sizeX = avio_rl32(pb); /* size */
512 st->codecpar->width = avio_rl32(pb);
513 st->codecpar->height = avio_rl32(pb);
514 /* not available for asf */
515 avio_rl16(pb); /* panes */
516 st->codecpar->bits_per_coded_sample = avio_rl16(pb); /* depth */
517 tag1 = avio_rl32(pb);
520 st->codecpar->extradata_size = ffio_limit(pb, sizeX - 40);
521 st->codecpar->extradata = av_mallocz(st->codecpar->extradata_size +
522 AV_INPUT_BUFFER_PADDING_SIZE);
523 if (!st->codecpar->extradata)
524 return AVERROR(ENOMEM);
525 avio_read(pb, st->codecpar->extradata, st->codecpar->extradata_size);
528 /* Extract palette from extradata if bpp <= 8 */
529 /* This code assumes that extradata contains only palette */
530 /* This is true for all paletted codecs implemented in libavcodec */
531 if (st->codecpar->extradata_size && (st->codecpar->bits_per_coded_sample <= 8)) {
534 for (i = 0; i < FFMIN(st->codecpar->extradata_size, AVPALETTE_SIZE) / 4; i++)
535 asf_st->palette[i] = av_bswap32(((uint32_t *)st->codecpar->extradata)[i]);
537 memcpy(asf_st->palette, st->codecpar->extradata,
538 FFMIN(st->codecpar->extradata_size, AVPALETTE_SIZE));
540 asf_st->palette_changed = 1;
543 st->codecpar->codec_tag = tag1;
544 st->codecpar->codec_id = ff_codec_get_id(ff_codec_bmp_tags, tag1);
545 if (tag1 == MKTAG('D', 'V', 'R', ' ')) {
546 st->need_parsing = AVSTREAM_PARSE_FULL;
547 /* issue658 contains wrong w/h and MS even puts a fake seq header
548 * with wrong w/h in extradata while a correct one is in the stream.
549 * maximum lameness */
550 st->codecpar->width =
551 st->codecpar->height = 0;
552 av_freep(&st->codecpar->extradata);
553 st->codecpar->extradata_size = 0;
555 if (st->codecpar->codec_id == AV_CODEC_ID_H264)
556 st->need_parsing = AVSTREAM_PARSE_FULL_ONCE;
557 if (st->codecpar->codec_id == AV_CODEC_ID_MPEG4)
558 st->need_parsing = AVSTREAM_PARSE_FULL_ONCE;
560 pos2 = avio_tell(pb);
561 avio_skip(pb, size - (pos2 - pos1 + 24));
566 static int asf_read_ext_stream_properties(AVFormatContext *s, int64_t size)
568 ASFContext *asf = s->priv_data;
569 AVIOContext *pb = s->pb;
571 int ext_len, payload_ext_ct, stream_ct, i;
572 uint32_t leak_rate, stream_num;
573 unsigned int stream_languageid_index;
575 avio_rl64(pb); // starttime
576 avio_rl64(pb); // endtime
577 leak_rate = avio_rl32(pb); // leak-datarate
578 avio_rl32(pb); // bucket-datasize
579 avio_rl32(pb); // init-bucket-fullness
580 avio_rl32(pb); // alt-leak-datarate
581 avio_rl32(pb); // alt-bucket-datasize
582 avio_rl32(pb); // alt-init-bucket-fullness
583 avio_rl32(pb); // max-object-size
584 avio_rl32(pb); // flags (reliable,seekable,no_cleanpoints?,resend-live-cleanpoints, rest of bits reserved)
585 stream_num = avio_rl16(pb); // stream-num
587 stream_languageid_index = avio_rl16(pb); // stream-language-id-index
588 if (stream_num < 128)
589 asf->streams[stream_num].stream_language_index = stream_languageid_index;
591 avio_rl64(pb); // avg frametime in 100ns units
592 stream_ct = avio_rl16(pb); // stream-name-count
593 payload_ext_ct = avio_rl16(pb); // payload-extension-system-count
595 if (stream_num < 128) {
596 asf->stream_bitrates[stream_num] = leak_rate;
597 asf->streams[stream_num].payload_ext_ct = 0;
600 for (i = 0; i < stream_ct; i++) {
602 ext_len = avio_rl16(pb);
603 avio_skip(pb, ext_len);
606 for (i = 0; i < payload_ext_ct; i++) {
609 size = avio_rl16(pb);
610 ext_len = avio_rl32(pb);
611 avio_skip(pb, ext_len);
612 if (stream_num < 128 && i < FF_ARRAY_ELEMS(asf->streams[stream_num].payload)) {
613 ASFPayload *p = &asf->streams[stream_num].payload[i];
616 av_log(s, AV_LOG_DEBUG, "Payload extension %x %d\n", g[0], p->size );
617 asf->streams[stream_num].payload_ext_ct ++;
624 static int asf_read_content_desc(AVFormatContext *s, int64_t size)
626 AVIOContext *pb = s->pb;
627 int len1, len2, len3, len4, len5;
629 len1 = avio_rl16(pb);
630 len2 = avio_rl16(pb);
631 len3 = avio_rl16(pb);
632 len4 = avio_rl16(pb);
633 len5 = avio_rl16(pb);
634 get_tag(s, "title", 0, len1, 32);
635 get_tag(s, "author", 0, len2, 32);
636 get_tag(s, "copyright", 0, len3, 32);
637 get_tag(s, "comment", 0, len4, 32);
643 static int asf_read_ext_content_desc(AVFormatContext *s, int64_t size)
645 AVIOContext *pb = s->pb;
646 ASFContext *asf = s->priv_data;
647 int desc_count, i, ret;
649 desc_count = avio_rl16(pb);
650 for (i = 0; i < desc_count; i++) {
651 int name_len, value_type, value_len;
654 name_len = avio_rl16(pb);
655 if (name_len % 2) // must be even, broken lavf versions wrote len-1
657 if ((ret = avio_get_str16le(pb, name_len, name, sizeof(name))) < name_len)
658 avio_skip(pb, name_len - ret);
659 value_type = avio_rl16(pb);
660 value_len = avio_rl16(pb);
661 if (!value_type && value_len % 2)
663 /* My sample has that stream set to 0 maybe that mean the container.
664 * ASF stream count starts at 1. I am using 0 to the container value
665 * since it's unused. */
666 if (!strcmp(name, "AspectRatioX"))
667 asf->dar[0].num = get_value(s->pb, value_type, 32);
668 else if (!strcmp(name, "AspectRatioY"))
669 asf->dar[0].den = get_value(s->pb, value_type, 32);
671 get_tag(s, name, value_type, value_len, 32);
677 static int asf_read_language_list(AVFormatContext *s, int64_t size)
679 AVIOContext *pb = s->pb;
680 ASFContext *asf = s->priv_data;
682 int stream_count = avio_rl16(pb);
683 for (j = 0; j < stream_count; j++) {
685 unsigned int lang_len = avio_r8(pb);
686 if ((ret = avio_get_str16le(pb, lang_len, lang,
687 sizeof(lang))) < lang_len)
688 avio_skip(pb, lang_len - ret);
690 av_strlcpy(asf->stream_languages[j], lang,
691 sizeof(*asf->stream_languages));
697 static int asf_read_metadata(AVFormatContext *s, int64_t size)
699 AVIOContext *pb = s->pb;
700 ASFContext *asf = s->priv_data;
701 int n, stream_num, name_len_utf16, name_len_utf8, value_len;
705 for (i = 0; i < n; i++) {
709 avio_rl16(pb); // lang_list_index
710 stream_num = avio_rl16(pb);
711 name_len_utf16 = avio_rl16(pb);
712 value_type = avio_rl16(pb); /* value_type */
713 value_len = avio_rl32(pb);
715 name_len_utf8 = 2*name_len_utf16 + 1;
716 name = av_malloc(name_len_utf8);
718 return AVERROR(ENOMEM);
720 if ((ret = avio_get_str16le(pb, name_len_utf16, name, name_len_utf8)) < name_len_utf16)
721 avio_skip(pb, name_len_utf16 - ret);
722 av_log(s, AV_LOG_TRACE, "%d stream %d name_len %2d type %d len %4d <%s>\n",
723 i, stream_num, name_len_utf16, value_type, value_len, name);
725 if (!strcmp(name, "AspectRatioX")){
726 int aspect_x = get_value(s->pb, value_type, 16);
728 asf->dar[stream_num].num = aspect_x;
729 } else if(!strcmp(name, "AspectRatioY")){
730 int aspect_y = get_value(s->pb, value_type, 16);
732 asf->dar[stream_num].den = aspect_y;
734 get_tag(s, name, value_type, value_len, 16);
742 static int asf_read_marker(AVFormatContext *s, int64_t size)
744 AVIOContext *pb = s->pb;
745 ASFContext *asf = s->priv_data;
746 int i, count, name_len, ret;
749 avio_rl64(pb); // reserved 16 bytes
750 avio_rl64(pb); // ...
751 count = avio_rl32(pb); // markers count
752 avio_rl16(pb); // reserved 2 bytes
753 name_len = avio_rl16(pb); // name length
754 avio_skip(pb, name_len);
756 for (i = 0; i < count; i++) {
761 return AVERROR_INVALIDDATA;
763 avio_rl64(pb); // offset, 8 bytes
764 pres_time = avio_rl64(pb); // presentation time
765 pres_time -= asf->hdr.preroll * 10000;
766 avio_rl16(pb); // entry length
767 avio_rl32(pb); // send time
768 avio_rl32(pb); // flags
769 name_len = avio_rl32(pb); // name length
770 if ((ret = avio_get_str16le(pb, name_len * 2, name,
771 sizeof(name))) < name_len)
772 avio_skip(pb, name_len - ret);
773 avpriv_new_chapter(s, i, (AVRational) { 1, 10000000 }, pres_time,
774 AV_NOPTS_VALUE, name);
780 static int asf_read_header(AVFormatContext *s)
782 ASFContext *asf = s->priv_data;
784 AVIOContext *pb = s->pb;
789 if (ff_guidcmp(&g, &ff_asf_header))
790 return AVERROR_INVALIDDATA;
795 memset(&asf->asfid2avid, -1, sizeof(asf->asfid2avid));
797 for (i = 0; i<128; i++)
798 asf->streams[i].stream_language_index = 128; // invalid stream index means no language info
801 uint64_t gpos = avio_tell(pb);
804 gsize = avio_rl64(pb);
806 if (!ff_guidcmp(&g, &ff_asf_data_header)) {
807 asf->data_object_offset = avio_tell(pb);
808 /* If not streaming, gsize is not unlimited (how?),
809 * and there is enough space in the file.. */
810 if (!(asf->hdr.flags & 0x01) && gsize >= 100)
811 asf->data_object_size = gsize - 24;
813 asf->data_object_size = (uint64_t)-1;
817 return AVERROR_INVALIDDATA;
818 if (!ff_guidcmp(&g, &ff_asf_file_header)) {
819 ret = asf_read_file_properties(s, gsize);
820 } else if (!ff_guidcmp(&g, &ff_asf_stream_header)) {
821 ret = asf_read_stream_properties(s, gsize);
822 } else if (!ff_guidcmp(&g, &ff_asf_comment_header)) {
823 asf_read_content_desc(s, gsize);
824 } else if (!ff_guidcmp(&g, &ff_asf_language_guid)) {
825 asf_read_language_list(s, gsize);
826 } else if (!ff_guidcmp(&g, &ff_asf_extended_content_header)) {
827 asf_read_ext_content_desc(s, gsize);
828 } else if (!ff_guidcmp(&g, &ff_asf_metadata_header)) {
829 asf_read_metadata(s, gsize);
830 } else if (!ff_guidcmp(&g, &ff_asf_metadata_library_header)) {
831 asf_read_metadata(s, gsize);
832 } else if (!ff_guidcmp(&g, &ff_asf_ext_stream_header)) {
833 asf_read_ext_stream_properties(s, gsize);
835 // there could be an optional stream properties object to follow
836 // if so the next iteration will pick it up
838 } else if (!ff_guidcmp(&g, &ff_asf_head1_guid)) {
842 } else if (!ff_guidcmp(&g, &ff_asf_marker_header)) {
843 asf_read_marker(s, gsize);
844 } else if (avio_feof(pb)) {
848 if (!ff_guidcmp(&g, &ff_asf_content_encryption)) {
851 av_log(s, AV_LOG_WARNING,
852 "DRM protected stream detected, decoding will likely fail!\n");
854 av_log(s, AV_LOG_DEBUG, "Secret data:\n");
856 if ((ret = av_get_packet(pb, &pkt, len)) < 0)
858 av_hex_dump_log(s, AV_LOG_DEBUG, pkt.data, pkt.size);
859 av_packet_unref(&pkt);
861 get_tag(s, "ASF_Protection_Type", -1, len, 32);
863 get_tag(s, "ASF_Key_ID", -1, len, 32);
865 get_tag(s, "ASF_License_URL", -1, len, 32);
866 } else if (!ff_guidcmp(&g, &ff_asf_ext_content_encryption)) {
867 av_log(s, AV_LOG_WARNING,
868 "Ext DRM protected stream detected, decoding will likely fail!\n");
869 av_dict_set(&s->metadata, "encryption", "ASF Extended Content Encryption", 0);
870 } else if (!ff_guidcmp(&g, &ff_asf_digital_signature)) {
871 av_log(s, AV_LOG_INFO, "Digital signature detected!\n");
878 if (avio_tell(pb) != gpos + gsize)
879 av_log(s, AV_LOG_DEBUG,
880 "gpos mismatch our pos=%"PRIu64", end=%"PRId64"\n",
881 avio_tell(pb) - gpos, gsize);
882 avio_seek(pb, gpos + gsize, SEEK_SET);
890 asf->data_offset = avio_tell(pb);
891 asf->packet_size_left = 0;
893 for (i = 0; i < 128; i++) {
894 int stream_num = asf->asfid2avid[i];
895 if (stream_num >= 0) {
896 AVStream *st = s->streams[stream_num];
897 if (!st->codecpar->bit_rate)
898 st->codecpar->bit_rate = asf->stream_bitrates[i];
899 if (asf->dar[i].num > 0 && asf->dar[i].den > 0) {
900 av_reduce(&st->sample_aspect_ratio.num,
901 &st->sample_aspect_ratio.den,
902 asf->dar[i].num, asf->dar[i].den, INT_MAX);
903 } else if ((asf->dar[0].num > 0) && (asf->dar[0].den > 0) &&
904 // Use ASF container value if the stream doesn't set AR.
905 (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO))
906 av_reduce(&st->sample_aspect_ratio.num,
907 &st->sample_aspect_ratio.den,
908 asf->dar[0].num, asf->dar[0].den, INT_MAX);
910 av_log(s, AV_LOG_TRACE, "i=%d, st->codecpar->codec_type:%d, asf->dar %d:%d sar=%d:%d\n",
911 i, st->codecpar->codec_type, asf->dar[i].num, asf->dar[i].den,
912 st->sample_aspect_ratio.num, st->sample_aspect_ratio.den);
914 // copy and convert language codes to the frontend
915 if (asf->streams[i].stream_language_index < 128) {
916 const char *rfc1766 = asf->stream_languages[asf->streams[i].stream_language_index];
917 if (rfc1766 && strlen(rfc1766) > 1) {
918 const char primary_tag[3] = { rfc1766[0], rfc1766[1], '\0' }; // ignore country code if any
919 const char *iso6392 = ff_convert_lang_to(primary_tag,
920 AV_LANG_ISO639_2_BIBL);
922 av_dict_set(&st->metadata, "language", iso6392, 0);
928 ff_metadata_conv(&s->metadata, NULL, ff_asf_metadata_conv);
933 #define DO_2BITS(bits, var, defval) \
934 switch (bits & 3) { \
936 var = avio_rl32(pb); \
940 var = avio_rl16(pb); \
953 * Load a single ASF packet into the demuxer.
954 * @param s demux context
955 * @param pb context to read data from
956 * @return 0 on success, <0 on error
958 static int asf_get_packet(AVFormatContext *s, AVIOContext *pb)
960 ASFContext *asf = s->priv_data;
961 uint32_t packet_length, padsize;
965 if (asf->uses_std_ecc > 0) {
966 // if we do not know packet size, allow skipping up to 32 kB
968 if (asf->no_resync_search)
970 // else if (s->packet_size > 0 && !asf->uses_std_ecc)
971 // off = (avio_tell(pb) - s->internal->data_offset) % s->packet_size + 3;
978 if (c == 0x82 && !d && !e)
983 /* This code allows handling of -EAGAIN at packet boundaries (i.e.
984 * if the packet sync code above triggers -EAGAIN). This does not
985 * imply complete -EAGAIN handling support at random positions in
987 if (pb->error == AVERROR(EAGAIN))
988 return AVERROR(EAGAIN);
990 av_log(s, AV_LOG_ERROR,
991 "ff asf bad header %x at:%"PRId64"\n", c, avio_tell(pb));
993 if ((c & 0x8f) == 0x82) {
996 av_log(s, AV_LOG_ERROR, "ff asf bad non zero\n");
997 return AVERROR_INVALIDDATA;
1002 } else if(!avio_feof(pb)) {
1003 avio_seek(pb, -1, SEEK_CUR); // FIXME
1012 avio_seek(pb, (c & 0xF) - 2, SEEK_CUR);
1017 avpriv_request_sample(s, "Invalid ECC byte");
1019 if (!asf->uses_std_ecc)
1020 asf->uses_std_ecc = (c == 0x82 && !d && !e) ? 1 : -1;
1024 asf->uses_std_ecc = -1;
1028 asf->packet_flags = c;
1029 asf->packet_property = d;
1031 DO_2BITS(asf->packet_flags >> 5, packet_length, s->packet_size);
1032 DO_2BITS(asf->packet_flags >> 1, padsize, 0); // sequence ignored
1033 DO_2BITS(asf->packet_flags >> 3, padsize, 0); // padding length
1035 // the following checks prevent overflows and infinite loops
1036 if (!packet_length || packet_length >= (1U << 29)) {
1037 av_log(s, AV_LOG_ERROR,
1038 "invalid packet_length %"PRIu32" at:%"PRId64"\n",
1039 packet_length, avio_tell(pb));
1040 return AVERROR_INVALIDDATA;
1042 if (padsize >= packet_length) {
1043 av_log(s, AV_LOG_ERROR,
1044 "invalid padsize %"PRIu32" at:%"PRId64"\n", padsize, avio_tell(pb));
1045 return AVERROR_INVALIDDATA;
1048 asf->packet_timestamp = avio_rl32(pb);
1049 avio_rl16(pb); /* duration */
1050 // rsize has at least 11 bytes which have to be present
1052 if (asf->packet_flags & 0x01) {
1053 asf->packet_segsizetype = avio_r8(pb);
1055 asf->packet_segments = asf->packet_segsizetype & 0x3f;
1057 asf->packet_segments = 1;
1058 asf->packet_segsizetype = 0x80;
1060 if (rsize > packet_length - padsize) {
1061 asf->packet_size_left = 0;
1062 av_log(s, AV_LOG_ERROR,
1063 "invalid packet header length %d for pktlen %"PRIu32"-%"PRIu32" at %"PRId64"\n",
1064 rsize, packet_length, padsize, avio_tell(pb));
1065 return AVERROR_INVALIDDATA;
1067 asf->packet_size_left = packet_length - padsize - rsize;
1068 if (packet_length < asf->hdr.min_pktsize)
1069 padsize += asf->hdr.min_pktsize - packet_length;
1070 asf->packet_padsize = padsize;
1071 av_log(s, AV_LOG_TRACE, "packet: size=%d padsize=%d left=%d\n",
1072 s->packet_size, asf->packet_padsize, asf->packet_size_left);
1078 * @return <0 if error
1080 static int asf_read_frame_header(AVFormatContext *s, AVIOContext *pb)
1082 ASFContext *asf = s->priv_data;
1085 int num = avio_r8(pb);
1087 int64_t ts0, ts1 av_unused;
1089 asf->packet_segments--;
1090 asf->packet_key_frame = num >> 7;
1091 asf->stream_index = asf->asfid2avid[num & 0x7f];
1092 asfst = &asf->streams[num & 0x7f];
1093 // sequence should be ignored!
1094 DO_2BITS(asf->packet_property >> 4, asf->packet_seq, 0);
1095 DO_2BITS(asf->packet_property >> 2, asf->packet_frag_offset, 0);
1096 DO_2BITS(asf->packet_property, asf->packet_replic_size, 0);
1097 av_log(asf, AV_LOG_TRACE, "key:%d stream:%d seq:%d offset:%d replic_size:%d num:%X packet_property %X\n",
1098 asf->packet_key_frame, asf->stream_index, asf->packet_seq,
1099 asf->packet_frag_offset, asf->packet_replic_size, num, asf->packet_property);
1100 if (rsize+(int64_t)asf->packet_replic_size > asf->packet_size_left) {
1101 av_log(s, AV_LOG_ERROR, "packet_replic_size %d is invalid\n", asf->packet_replic_size);
1102 return AVERROR_INVALIDDATA;
1104 if (asf->packet_replic_size >= 8) {
1105 int64_t end = avio_tell(pb) + asf->packet_replic_size;
1107 asfst->packet_obj_size = avio_rl32(pb);
1108 if (asfst->packet_obj_size >= (1 << 24) || asfst->packet_obj_size < 0) {
1109 av_log(s, AV_LOG_ERROR, "packet_obj_size %d invalid\n", asfst->packet_obj_size);
1110 asfst->packet_obj_size = 0;
1111 return AVERROR_INVALIDDATA;
1113 asf->packet_frag_timestamp = avio_rl32(pb); // timestamp
1115 for (i = 0; i < asfst->payload_ext_ct; i++) {
1116 ASFPayload *p = &asfst->payload[i];
1120 size = avio_rl16(pb);
1121 payend = avio_tell(pb) + size;
1123 av_log(s, AV_LOG_ERROR, "too long payload\n");
1128 // duration = avio_rl16(pb);
1131 aspect.num = avio_r8(pb);
1132 aspect.den = avio_r8(pb);
1133 if (aspect.num > 0 && aspect.den > 0 && asf->stream_index >= 0) {
1134 s->streams[asf->stream_index]->sample_aspect_ratio = aspect;
1139 ts0 = avio_rl64(pb);
1140 ts1 = avio_rl64(pb);
1141 if (ts0!= -1) asf->packet_frag_timestamp = ts0/10000;
1142 else asf->packet_frag_timestamp = AV_NOPTS_VALUE;
1153 avio_seek(pb, payend, SEEK_SET);
1156 avio_seek(pb, end, SEEK_SET);
1157 rsize += asf->packet_replic_size; // FIXME - check validity
1158 } else if (asf->packet_replic_size == 1) {
1159 // multipacket - frag_offset is beginning timestamp
1160 asf->packet_time_start = asf->packet_frag_offset;
1161 asf->packet_frag_offset = 0;
1162 asf->packet_frag_timestamp = asf->packet_timestamp;
1164 asf->packet_time_delta = avio_r8(pb);
1166 } else if (asf->packet_replic_size != 0) {
1167 av_log(s, AV_LOG_ERROR, "unexpected packet_replic_size of %d\n",
1168 asf->packet_replic_size);
1169 return AVERROR_INVALIDDATA;
1171 if (asf->packet_flags & 0x01) {
1172 DO_2BITS(asf->packet_segsizetype >> 6, asf->packet_frag_size, 0); // 0 is illegal
1173 if (rsize > asf->packet_size_left) {
1174 av_log(s, AV_LOG_ERROR, "packet_replic_size is invalid\n");
1175 return AVERROR_INVALIDDATA;
1176 } else if (asf->packet_frag_size > asf->packet_size_left - rsize) {
1177 if (asf->packet_frag_size > asf->packet_size_left - rsize + asf->packet_padsize) {
1178 av_log(s, AV_LOG_ERROR, "packet_frag_size is invalid (%d>%d-%d+%d)\n",
1179 asf->packet_frag_size, asf->packet_size_left, rsize, asf->packet_padsize);
1180 return AVERROR_INVALIDDATA;
1182 int diff = asf->packet_frag_size - (asf->packet_size_left - rsize);
1183 asf->packet_size_left += diff;
1184 asf->packet_padsize -= diff;
1188 asf->packet_frag_size = asf->packet_size_left - rsize;
1190 if (asf->packet_replic_size == 1) {
1191 asf->packet_multi_size = asf->packet_frag_size;
1192 if (asf->packet_multi_size > asf->packet_size_left)
1193 return AVERROR_INVALIDDATA;
1195 asf->packet_size_left -= rsize;
1201 * Parse data from individual ASF packets (which were previously loaded
1202 * with asf_get_packet()).
1203 * @param s demux context
1204 * @param pb context to read data from
1205 * @param pkt pointer to store packet data into
1206 * @return 0 if data was stored in pkt, <0 on error or 1 if more ASF
1207 * packets need to be loaded (through asf_get_packet())
1209 static int asf_parse_packet(AVFormatContext *s, AVIOContext *pb, AVPacket *pkt)
1211 ASFContext *asf = s->priv_data;
1212 ASFStream *asf_st = 0;
1217 if (asf->packet_size_left < FRAME_HEADER_SIZE ||
1218 asf->packet_segments < 1 && asf->packet_time_start == 0) {
1219 int ret = asf->packet_size_left + asf->packet_padsize;
1221 if (asf->packet_size_left && asf->packet_size_left < FRAME_HEADER_SIZE)
1222 av_log(s, AV_LOG_WARNING, "Skip due to FRAME_HEADER_SIZE\n");
1228 asf->packet_pos = avio_tell(pb);
1229 if (asf->data_object_size != (uint64_t)-1 &&
1230 (asf->packet_pos - asf->data_object_offset >= asf->data_object_size))
1231 return AVERROR_EOF; /* Do not exceed the size of the data object */
1234 if (asf->packet_time_start == 0) {
1235 if (asf_read_frame_header(s, pb) < 0) {
1236 asf->packet_time_start = asf->packet_segments = 0;
1239 if (asf->stream_index < 0 ||
1240 s->streams[asf->stream_index]->discard >= AVDISCARD_ALL ||
1241 (!asf->packet_key_frame &&
1242 (s->streams[asf->stream_index]->discard >= AVDISCARD_NONKEY || asf->streams[s->streams[asf->stream_index]->id].skip_to_key))) {
1243 asf->packet_time_start = 0;
1244 /* unhandled packet (should not happen) */
1245 avio_skip(pb, asf->packet_frag_size);
1246 asf->packet_size_left -= asf->packet_frag_size;
1247 if (asf->stream_index < 0)
1248 av_log(s, AV_LOG_ERROR, "ff asf skip %d (unknown stream)\n",
1249 asf->packet_frag_size);
1252 asf->asf_st = &asf->streams[s->streams[asf->stream_index]->id];
1253 if (!asf->packet_frag_offset)
1254 asf->asf_st->skip_to_key = 0;
1256 asf_st = asf->asf_st;
1259 if (!asf_st->frag_offset && asf->packet_frag_offset) {
1260 av_log(s, AV_LOG_TRACE, "skipping asf data pkt with fragment offset for "
1261 "stream:%d, expected:%d but got %d from pkt)\n",
1262 asf->stream_index, asf_st->frag_offset,
1263 asf->packet_frag_offset);
1264 avio_skip(pb, asf->packet_frag_size);
1265 asf->packet_size_left -= asf->packet_frag_size;
1269 if (asf->packet_replic_size == 1) {
1270 // frag_offset is here used as the beginning timestamp
1271 asf->packet_frag_timestamp = asf->packet_time_start;
1272 asf->packet_time_start += asf->packet_time_delta;
1273 asf_st->packet_obj_size = asf->packet_frag_size = avio_r8(pb);
1274 asf->packet_size_left--;
1275 asf->packet_multi_size--;
1276 if (asf->packet_multi_size < asf_st->packet_obj_size) {
1277 asf->packet_time_start = 0;
1278 avio_skip(pb, asf->packet_multi_size);
1279 asf->packet_size_left -= asf->packet_multi_size;
1282 asf->packet_multi_size -= asf_st->packet_obj_size;
1285 if (asf_st->pkt.size != asf_st->packet_obj_size ||
1286 // FIXME is this condition sufficient?
1287 asf_st->frag_offset + asf->packet_frag_size > asf_st->pkt.size) {
1290 if (asf_st->pkt.data) {
1291 av_log(s, AV_LOG_INFO,
1292 "freeing incomplete packet size %d, new %d\n",
1293 asf_st->pkt.size, asf_st->packet_obj_size);
1294 asf_st->frag_offset = 0;
1295 av_packet_unref(&asf_st->pkt);
1298 if ((ret = av_new_packet(&asf_st->pkt, asf_st->packet_obj_size)) < 0)
1300 asf_st->seq = asf->packet_seq;
1301 if (asf->ts_is_pts) {
1302 asf_st->pkt.pts = asf->packet_frag_timestamp - asf->hdr.preroll;
1304 asf_st->pkt.dts = asf->packet_frag_timestamp - asf->hdr.preroll;
1305 asf_st->pkt.stream_index = asf->stream_index;
1306 asf_st->pkt.pos = asf_st->packet_pos = asf->packet_pos;
1307 asf_st->pkt_clean = 0;
1309 if (asf_st->pkt.data && asf_st->palette_changed) {
1311 pal = av_packet_new_side_data(&asf_st->pkt, AV_PKT_DATA_PALETTE,
1314 av_log(s, AV_LOG_ERROR, "Cannot append palette to packet\n");
1316 memcpy(pal, asf_st->palette, AVPALETTE_SIZE);
1317 asf_st->palette_changed = 0;
1320 av_log(asf, AV_LOG_TRACE, "new packet: stream:%d key:%d packet_key:%d audio:%d size:%d\n",
1321 asf->stream_index, asf->packet_key_frame,
1322 asf_st->pkt.flags & AV_PKT_FLAG_KEY,
1323 s->streams[asf->stream_index]->codecpar->codec_type == AVMEDIA_TYPE_AUDIO,
1324 asf_st->packet_obj_size);
1325 if (s->streams[asf->stream_index]->codecpar->codec_type == AVMEDIA_TYPE_AUDIO)
1326 asf->packet_key_frame = 1;
1327 if (asf->packet_key_frame)
1328 asf_st->pkt.flags |= AV_PKT_FLAG_KEY;
1332 av_log(asf, AV_LOG_TRACE, "READ PACKET s:%d os:%d o:%d,%d l:%d DATA:%p\n",
1333 s->packet_size, asf_st->pkt.size, asf->packet_frag_offset,
1334 asf_st->frag_offset, asf->packet_frag_size, asf_st->pkt.data);
1335 asf->packet_size_left -= asf->packet_frag_size;
1336 if (asf->packet_size_left < 0)
1339 if (asf->packet_frag_offset >= asf_st->pkt.size ||
1340 asf->packet_frag_size > asf_st->pkt.size - asf->packet_frag_offset) {
1341 av_log(s, AV_LOG_ERROR,
1342 "packet fragment position invalid %u,%u not in %u\n",
1343 asf->packet_frag_offset, asf->packet_frag_size,
1348 if (asf->packet_frag_offset != asf_st->frag_offset && !asf_st->pkt_clean) {
1349 memset(asf_st->pkt.data + asf_st->frag_offset, 0, asf_st->pkt.size - asf_st->frag_offset);
1350 asf_st->pkt_clean = 1;
1353 ret = avio_read(pb, asf_st->pkt.data + asf->packet_frag_offset,
1354 asf->packet_frag_size);
1355 if (ret != asf->packet_frag_size) {
1356 if (ret < 0 || asf->packet_frag_offset + ret == 0)
1357 return ret < 0 ? ret : AVERROR_EOF;
1359 if (asf_st->ds_span > 1) {
1360 // scrambling, we can either drop it completely or fill the remainder
1361 // TODO: should we fill the whole packet instead of just the current
1363 memset(asf_st->pkt.data + asf->packet_frag_offset + ret, 0,
1364 asf->packet_frag_size - ret);
1365 ret = asf->packet_frag_size;
1367 // no scrambling, so we can return partial packets
1368 av_shrink_packet(&asf_st->pkt, asf->packet_frag_offset + ret);
1371 if (s->key && s->keylen == 20)
1372 ff_asfcrypt_dec(s->key, asf_st->pkt.data + asf->packet_frag_offset,
1374 asf_st->frag_offset += ret;
1375 /* test if whole packet is read */
1376 if (asf_st->frag_offset == asf_st->pkt.size) {
1377 // workaround for macroshit radio DVR-MS files
1378 if (s->streams[asf->stream_index]->codecpar->codec_id == AV_CODEC_ID_MPEG2VIDEO &&
1379 asf_st->pkt.size > 100) {
1381 for (i = 0; i < asf_st->pkt.size && !asf_st->pkt.data[i]; i++)
1383 if (i == asf_st->pkt.size) {
1384 av_log(s, AV_LOG_DEBUG, "discarding ms fart\n");
1385 asf_st->frag_offset = 0;
1386 av_packet_unref(&asf_st->pkt);
1392 if (asf_st->ds_span > 1) {
1393 if (asf_st->pkt.size != asf_st->ds_packet_size * asf_st->ds_span) {
1394 av_log(s, AV_LOG_ERROR,
1395 "pkt.size != ds_packet_size * ds_span (%d %d %d)\n",
1396 asf_st->pkt.size, asf_st->ds_packet_size,
1399 /* packet descrambling */
1400 AVBufferRef *buf = av_buffer_alloc(asf_st->pkt.size +
1401 AV_INPUT_BUFFER_PADDING_SIZE);
1403 uint8_t *newdata = buf->data;
1405 memset(newdata + asf_st->pkt.size, 0,
1406 AV_INPUT_BUFFER_PADDING_SIZE);
1407 while (offset < asf_st->pkt.size) {
1408 int off = offset / asf_st->ds_chunk_size;
1409 int row = off / asf_st->ds_span;
1410 int col = off % asf_st->ds_span;
1411 int idx = row + col * asf_st->ds_packet_size / asf_st->ds_chunk_size;
1412 assert(offset + asf_st->ds_chunk_size <= asf_st->pkt.size);
1413 assert(idx + 1 <= asf_st->pkt.size / asf_st->ds_chunk_size);
1414 memcpy(newdata + offset,
1415 asf_st->pkt.data + idx * asf_st->ds_chunk_size,
1416 asf_st->ds_chunk_size);
1417 offset += asf_st->ds_chunk_size;
1419 av_buffer_unref(&asf_st->pkt.buf);
1420 asf_st->pkt.buf = buf;
1421 asf_st->pkt.data = buf->data;
1425 asf_st->frag_offset = 0;
1427 asf_st->pkt.buf = 0;
1428 asf_st->pkt.size = 0;
1429 asf_st->pkt.data = 0;
1430 asf_st->pkt.side_data_elems = 0;
1431 asf_st->pkt.side_data = NULL;
1432 break; // packet completed
1438 static int asf_read_packet(AVFormatContext *s, AVPacket *pkt)
1440 ASFContext *asf = s->priv_data;
1445 /* parse cached packets, if any */
1446 if ((ret = asf_parse_packet(s, s->pb, pkt)) <= 0)
1448 if ((ret = asf_get_packet(s, s->pb)) < 0)
1449 assert(asf->packet_size_left < FRAME_HEADER_SIZE ||
1450 asf->packet_segments < 1);
1451 asf->packet_time_start = 0;
1455 // Added to support seeking after packets have been read
1456 // If information is not reset, read_packet fails due to
1457 // leftover information from previous reads
1458 static void asf_reset_header(AVFormatContext *s)
1460 ASFContext *asf = s->priv_data;
1464 asf->packet_size_left = 0;
1465 asf->packet_flags = 0;
1466 asf->packet_property = 0;
1467 asf->packet_timestamp = 0;
1468 asf->packet_segsizetype = 0;
1469 asf->packet_segments = 0;
1470 asf->packet_seq = 0;
1471 asf->packet_replic_size = 0;
1472 asf->packet_key_frame = 0;
1473 asf->packet_padsize = 0;
1474 asf->packet_frag_offset = 0;
1475 asf->packet_frag_size = 0;
1476 asf->packet_frag_timestamp = 0;
1477 asf->packet_multi_size = 0;
1478 asf->packet_time_delta = 0;
1479 asf->packet_time_start = 0;
1481 for (i = 0; i < 128; i++) {
1482 asf_st = &asf->streams[i];
1483 av_packet_unref(&asf_st->pkt);
1484 asf_st->packet_obj_size = 0;
1485 asf_st->frag_offset = 0;
1491 static void skip_to_key(AVFormatContext *s)
1493 ASFContext *asf = s->priv_data;
1496 for (i = 0; i < 128; i++) {
1497 int j = asf->asfid2avid[i];
1498 ASFStream *asf_st = &asf->streams[i];
1499 if (j < 0 || s->streams[j]->codecpar->codec_type != AVMEDIA_TYPE_VIDEO)
1502 asf_st->skip_to_key = 1;
1506 static int asf_read_close(AVFormatContext *s)
1508 asf_reset_header(s);
1513 static int64_t asf_read_pts(AVFormatContext *s, int stream_index,
1514 int64_t *ppos, int64_t pos_limit)
1516 ASFContext *asf = s->priv_data;
1517 AVPacket pkt1, *pkt = &pkt1;
1520 int64_t pos = *ppos;
1522 int64_t start_pos[ASF_MAX_STREAMS];
1524 for (i = 0; i < s->nb_streams; i++)
1527 if (s->packet_size > 0)
1528 pos = (pos + s->packet_size - 1 - s->internal->data_offset) /
1529 s->packet_size * s->packet_size +
1530 s->internal->data_offset;
1532 if (avio_seek(s->pb, pos, SEEK_SET) < 0)
1533 return AV_NOPTS_VALUE;
1535 ff_read_frame_flush(s);
1536 asf_reset_header(s);
1538 if (av_read_frame(s, pkt) < 0) {
1539 av_log(s, AV_LOG_INFO, "asf_read_pts failed\n");
1540 return AV_NOPTS_VALUE;
1545 if (pkt->flags & AV_PKT_FLAG_KEY) {
1546 i = pkt->stream_index;
1548 asf_st = &asf->streams[s->streams[i]->id];
1550 // assert((asf_st->packet_pos - s->data_offset) % s->packet_size == 0);
1551 pos = asf_st->packet_pos;
1552 av_assert1(pkt->pos == asf_st->packet_pos);
1554 av_add_index_entry(s->streams[i], pos, pts, pkt->size,
1555 pos - start_pos[i] + 1, AVINDEX_KEYFRAME);
1556 start_pos[i] = asf_st->packet_pos + 1;
1558 if (pkt->stream_index == stream_index) {
1559 av_packet_unref(pkt);
1563 av_packet_unref(pkt);
1570 static int asf_build_simple_index(AVFormatContext *s, int stream_index)
1573 ASFContext *asf = s->priv_data;
1574 int64_t current_pos = avio_tell(s->pb);
1577 if((ret = avio_seek(s->pb, asf->data_object_offset + asf->data_object_size, SEEK_SET)) < 0) {
1581 if ((ret = ff_get_guid(s->pb, &g)) < 0)
1584 /* the data object can be followed by other top-level objects,
1585 * skip them until the simple index object is reached */
1586 while (ff_guidcmp(&g, &ff_asf_simple_index_header)) {
1587 int64_t gsize = avio_rl64(s->pb);
1588 if (gsize < 24 || avio_feof(s->pb)) {
1591 avio_skip(s->pb, gsize - 24);
1592 if ((ret = ff_get_guid(s->pb, &g)) < 0)
1597 int64_t itime, last_pos = -1;
1600 int64_t av_unused gsize = avio_rl64(s->pb);
1601 if ((ret = ff_get_guid(s->pb, &g)) < 0)
1603 itime = avio_rl64(s->pb);
1604 pct = avio_rl32(s->pb);
1605 ict = avio_rl32(s->pb);
1606 av_log(s, AV_LOG_DEBUG,
1607 "itime:0x%"PRIx64", pct:%d, ict:%d\n", itime, pct, ict);
1609 for (i = 0; i < ict; i++) {
1610 int pktnum = avio_rl32(s->pb);
1611 int pktct = avio_rl16(s->pb);
1612 int64_t pos = s->internal->data_offset + s->packet_size * (int64_t)pktnum;
1613 int64_t index_pts = FFMAX(av_rescale(itime, i, 10000) - asf->hdr.preroll, 0);
1615 if (avio_feof(s->pb)) {
1616 ret = AVERROR_INVALIDDATA;
1620 if (pos != last_pos) {
1621 av_log(s, AV_LOG_DEBUG, "pktnum:%d, pktct:%d pts: %"PRId64"\n",
1622 pktnum, pktct, index_pts);
1623 av_add_index_entry(s->streams[stream_index], pos, index_pts,
1624 s->packet_size, 0, AVINDEX_KEYFRAME);
1628 asf->index_read = ict > 1;
1631 // if (avio_feof(s->pb)) {
1634 avio_seek(s->pb, current_pos, SEEK_SET);
1638 static int asf_read_seek(AVFormatContext *s, int stream_index,
1639 int64_t pts, int flags)
1641 ASFContext *asf = s->priv_data;
1642 AVStream *st = s->streams[stream_index];
1645 if (s->packet_size <= 0)
1648 /* Try using the protocol's read_seek if available */
1650 int64_t ret = avio_seek_time(s->pb, stream_index, pts, flags);
1652 asf_reset_header(s);
1653 if (ret != AVERROR(ENOSYS))
1657 /* explicitly handle the case of seeking to 0 */
1659 asf_reset_header(s);
1660 avio_seek(s->pb, s->internal->data_offset, SEEK_SET);
1664 if (!asf->index_read) {
1665 ret = asf_build_simple_index(s, stream_index);
1667 asf->index_read = -1;
1670 if (asf->index_read > 0 && st->index_entries) {
1671 int index = av_index_search_timestamp(st, pts, flags);
1673 /* find the position */
1674 uint64_t pos = st->index_entries[index].pos;
1677 av_log(s, AV_LOG_DEBUG, "SEEKTO: %"PRId64"\n", pos);
1678 if(avio_seek(s->pb, pos, SEEK_SET) < 0)
1680 asf_reset_header(s);
1685 /* no index or seeking by index failed */
1686 if (ff_seek_frame_binary(s, stream_index, pts, flags) < 0)
1688 asf_reset_header(s);
1693 AVInputFormat ff_asf_demuxer = {
1695 .long_name = NULL_IF_CONFIG_SMALL("ASF (Advanced / Active Streaming Format)"),
1696 .priv_data_size = sizeof(ASFContext),
1697 .read_probe = asf_probe,
1698 .read_header = asf_read_header,
1699 .read_packet = asf_read_packet,
1700 .read_close = asf_read_close,
1701 .read_seek = asf_read_seek,
1702 .read_timestamp = asf_read_pts,
1703 .flags = AVFMT_NOBINSEARCH | AVFMT_NOGENSEARCH,
1704 .priv_class = &asf_class,