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"
41 typedef struct ASFPayload {
46 typedef struct ASFStream {
58 int ds_span; /* descrambling */
64 uint16_t stream_language_index;
67 uint32_t palette[256];
70 ASFPayload payload[8];
73 typedef struct ASFContext {
75 int asfid2avid[128]; ///< conversion table from asf ID 2 AVStream ID
76 ASFStream streams[128]; ///< it's max number and it's not that big
77 uint32_t stream_bitrates[128]; ///< max number of streams, bitrate for each (for streaming)
79 char stream_languages[128][6]; ///< max number of streams, language for each (RFC1766, e.g. en-US)
80 /* non streamed additonnal info */
83 /* only for reading */
84 uint64_t data_offset; ///< beginning of the first data packet
85 uint64_t data_object_offset; ///< data object offset (excl. GUID & size)
86 uint64_t data_object_size; ///< size of the data object
94 int packet_segsizetype;
97 int packet_replic_size;
100 unsigned int packet_frag_offset;
101 unsigned int packet_frag_size;
102 int64_t packet_frag_timestamp;
104 int packet_multi_size;
105 int packet_time_delta;
106 int packet_time_start;
111 ASFStream *asf_st; ///< currently decoded stream
113 int no_resync_search;
119 static const AVOption options[] = {
120 { "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 },
121 { "export_xmp", "Export full XMP metadata", offsetof(ASFContext, export_xmp), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, AV_OPT_FLAG_DECODING_PARAM },
125 static const AVClass asf_class = {
126 .class_name = "asf demuxer",
127 .item_name = av_default_item_name,
129 .version = LIBAVUTIL_VERSION_INT,
135 #define ASF_MAX_STREAMS 127
136 #define FRAME_HEADER_SIZE 6
137 // Fix Me! FRAME_HEADER_SIZE may be different.
138 // (7 is known to be too large for GipsyGuitar.wmv)
141 static const ff_asf_guid stream_bitrate_guid = { /* (http://get.to/sdp) */
142 0xce, 0x75, 0xf8, 0x7b, 0x8d, 0x46, 0xd1, 0x11, 0x8d, 0x82, 0x00, 0x60, 0x97, 0xc9, 0xa2, 0xb2
145 static const ff_asf_guid asf_audio_conceal_none = {
146 // 0x40, 0xa4, 0xf1, 0x49, 0x4ece, 0x11d0, 0xa3, 0xac, 0x00, 0xa0, 0xc9, 0x03, 0x48, 0xf6
147 // New value lifted from avifile
148 0x00, 0x57, 0xfb, 0x20, 0x55, 0x5B, 0xCF, 0x11, 0xa8, 0xfd, 0x00, 0x80, 0x5f, 0x5c, 0x44, 0x2b
151 #define PRINT_IF_GUID(g, cmp) \
152 if (!ff_guidcmp(g, &cmp)) \
153 av_log(NULL, AV_LOG_TRACE, "(GUID: %s) ", # cmp)
155 static void print_guid(ff_asf_guid *g)
158 PRINT_IF_GUID(g, ff_asf_header);
159 else PRINT_IF_GUID(g, ff_asf_file_header);
160 else PRINT_IF_GUID(g, ff_asf_stream_header);
161 else PRINT_IF_GUID(g, ff_asf_audio_stream);
162 else PRINT_IF_GUID(g, asf_audio_conceal_none);
163 else PRINT_IF_GUID(g, ff_asf_video_stream);
164 else PRINT_IF_GUID(g, ff_asf_video_conceal_none);
165 else PRINT_IF_GUID(g, ff_asf_command_stream);
166 else PRINT_IF_GUID(g, ff_asf_comment_header);
167 else PRINT_IF_GUID(g, ff_asf_codec_comment_header);
168 else PRINT_IF_GUID(g, ff_asf_codec_comment1_header);
169 else PRINT_IF_GUID(g, ff_asf_data_header);
170 else PRINT_IF_GUID(g, ff_asf_simple_index_header);
171 else PRINT_IF_GUID(g, ff_asf_head1_guid);
172 else PRINT_IF_GUID(g, ff_asf_head2_guid);
173 else PRINT_IF_GUID(g, ff_asf_my_guid);
174 else PRINT_IF_GUID(g, ff_asf_ext_stream_header);
175 else PRINT_IF_GUID(g, ff_asf_extended_content_header);
176 else PRINT_IF_GUID(g, ff_asf_ext_stream_embed_stream_header);
177 else PRINT_IF_GUID(g, ff_asf_ext_stream_audio_stream);
178 else PRINT_IF_GUID(g, ff_asf_metadata_header);
179 else PRINT_IF_GUID(g, ff_asf_metadata_library_header);
180 else PRINT_IF_GUID(g, ff_asf_marker_header);
181 else PRINT_IF_GUID(g, stream_bitrate_guid);
182 else PRINT_IF_GUID(g, ff_asf_language_guid);
184 av_log(NULL, AV_LOG_TRACE, "(GUID: unknown) ");
185 for (i = 0; i < 16; i++)
186 av_log(NULL, AV_LOG_TRACE, " 0x%02x,", (*g)[i]);
187 av_log(NULL, AV_LOG_TRACE, "}\n");
191 #define print_guid(g) while(0)
194 static int asf_probe(const AVProbeData *pd)
196 /* check file header */
197 if (!ff_guidcmp(pd->buf, &ff_asf_header))
198 return AVPROBE_SCORE_MAX;
203 /* size of type 2 (BOOL) is 32bit for "Extended Content Description Object"
204 * but 16 bit for "Metadata Object" and "Metadata Library Object" */
205 static int get_value(AVIOContext *pb, int type, int type2_size)
209 return (type2_size == 32) ? avio_rl32(pb) : avio_rl16(pb);
211 return avio_rl32(pb);
213 return avio_rl64(pb);
215 return avio_rl16(pb);
221 static void get_tag(AVFormatContext *s, const char *key, int type, int len, int type2_size)
223 ASFContext *asf = s->priv_data;
225 int64_t off = avio_tell(s->pb);
228 av_assert0((unsigned)len < (INT_MAX - LEN) / 2);
230 if (!asf->export_xmp && !strncmp(key, "xmp", 3))
233 value = av_malloc(2 * len + LEN);
239 avio_get_str16le(s->pb, len, value, 2 * len + 1);
242 avio_read(s->pb, value, len);
246 if (ff_asf_handle_byte_array(s, key, len) > 0)
247 av_log(s, AV_LOG_VERBOSE, "Unsupported byte array in tag %s.\n", key);
253 uint64_t num = get_value(s->pb, type, type2_size);
254 snprintf(value, LEN, "%"PRIu64, num);
258 av_log(s, AV_LOG_DEBUG, "Unsupported GUID value in tag %s.\n", key);
261 av_log(s, AV_LOG_DEBUG,
262 "Unsupported value type %d in tag %s.\n", type, key);
266 av_dict_set(&s->metadata, key, value, 0);
270 avio_seek(s->pb, off + len, SEEK_SET);
273 static int asf_read_file_properties(AVFormatContext *s, int64_t size)
275 ASFContext *asf = s->priv_data;
276 AVIOContext *pb = s->pb;
278 ff_get_guid(pb, &asf->hdr.guid);
279 asf->hdr.file_size = avio_rl64(pb);
280 asf->hdr.create_time = avio_rl64(pb);
281 avio_rl64(pb); /* number of packets */
282 asf->hdr.play_time = avio_rl64(pb);
283 asf->hdr.send_time = avio_rl64(pb);
284 asf->hdr.preroll = avio_rl32(pb);
285 asf->hdr.ignore = avio_rl32(pb);
286 asf->hdr.flags = avio_rl32(pb);
287 asf->hdr.min_pktsize = avio_rl32(pb);
288 asf->hdr.max_pktsize = avio_rl32(pb);
289 if (asf->hdr.min_pktsize >= (1U << 29))
290 return AVERROR_INVALIDDATA;
291 asf->hdr.max_bitrate = avio_rl32(pb);
292 s->packet_size = asf->hdr.max_pktsize;
297 static int asf_read_stream_properties(AVFormatContext *s, int64_t size)
299 ASFContext *asf = s->priv_data;
300 AVIOContext *pb = s->pb;
304 enum AVMediaType type;
305 int type_specific_size, sizeX;
307 int64_t pos1, pos2, start_time;
308 int test_for_ext_stream_audio, is_dvr_ms_audio = 0;
310 if (s->nb_streams == ASF_MAX_STREAMS) {
311 av_log(s, AV_LOG_ERROR, "too many streams\n");
312 return AVERROR(EINVAL);
315 pos1 = avio_tell(pb);
317 st = avformat_new_stream(s, NULL);
319 return AVERROR(ENOMEM);
320 avpriv_set_pts_info(st, 32, 1, 1000); /* 32 bit pts in ms */
321 start_time = asf->hdr.preroll;
323 if (!(asf->hdr.flags & 0x01)) { // if we aren't streaming...
324 int64_t fsize = avio_size(pb);
325 if (fsize <= 0 || (int64_t)asf->hdr.file_size <= 0 ||
326 FFABS(fsize - (int64_t)asf->hdr.file_size) < FFMIN(fsize, asf->hdr.file_size)/20)
327 st->duration = asf->hdr.play_time /
328 (10000000 / 1000) - start_time;
332 test_for_ext_stream_audio = 0;
333 if (!ff_guidcmp(&g, &ff_asf_audio_stream)) {
334 type = AVMEDIA_TYPE_AUDIO;
335 } else if (!ff_guidcmp(&g, &ff_asf_video_stream)) {
336 type = AVMEDIA_TYPE_VIDEO;
337 } else if (!ff_guidcmp(&g, &ff_asf_jfif_media)) {
338 type = AVMEDIA_TYPE_VIDEO;
339 st->codecpar->codec_id = AV_CODEC_ID_MJPEG;
340 } else if (!ff_guidcmp(&g, &ff_asf_command_stream)) {
341 type = AVMEDIA_TYPE_DATA;
342 } else if (!ff_guidcmp(&g, &ff_asf_ext_stream_embed_stream_header)) {
343 test_for_ext_stream_audio = 1;
344 type = AVMEDIA_TYPE_UNKNOWN;
349 avio_skip(pb, 8); /* total_size */
350 type_specific_size = avio_rl32(pb);
352 st->id = avio_rl16(pb) & 0x7f; /* stream id */
353 // mapping of asf ID to AV stream ID;
354 asf->asfid2avid[st->id] = s->nb_streams - 1;
355 asf_st = &asf->streams[st->id];
359 if (test_for_ext_stream_audio) {
361 if (!ff_guidcmp(&g, &ff_asf_ext_stream_audio_stream)) {
362 type = AVMEDIA_TYPE_AUDIO;
373 st->codecpar->codec_type = type;
374 if (type == AVMEDIA_TYPE_AUDIO) {
375 int ret = ff_get_wav_header(s, pb, st->codecpar, type_specific_size, 0);
378 if (is_dvr_ms_audio) {
379 // codec_id and codec_tag are unreliable in dvr_ms
380 // files. Set them later by probing stream.
381 st->internal->request_probe = 1;
382 st->codecpar->codec_tag = 0;
384 if (st->codecpar->codec_id == AV_CODEC_ID_AAC)
385 st->need_parsing = AVSTREAM_PARSE_NONE;
387 st->need_parsing = AVSTREAM_PARSE_FULL;
388 /* We have to init the frame size at some point .... */
389 pos2 = avio_tell(pb);
390 if (size >= (pos2 + 8 - pos1 + 24)) {
391 asf_st->ds_span = avio_r8(pb);
392 asf_st->ds_packet_size = avio_rl16(pb);
393 asf_st->ds_chunk_size = avio_rl16(pb);
394 avio_rl16(pb); // ds_data_size
395 avio_r8(pb); // ds_silence_data
397 if (asf_st->ds_span > 1) {
398 if (!asf_st->ds_chunk_size ||
399 (asf_st->ds_packet_size / asf_st->ds_chunk_size <= 1) ||
400 asf_st->ds_packet_size % asf_st->ds_chunk_size)
401 asf_st->ds_span = 0; // disable descrambling
403 } else if (type == AVMEDIA_TYPE_VIDEO &&
404 size - (avio_tell(pb) - pos1 + 24) >= 51) {
408 avio_rl16(pb); /* size */
409 sizeX = avio_rl32(pb); /* size */
410 st->codecpar->width = avio_rl32(pb);
411 st->codecpar->height = avio_rl32(pb);
412 /* not available for asf */
413 avio_rl16(pb); /* panes */
414 st->codecpar->bits_per_coded_sample = avio_rl16(pb); /* depth */
415 tag1 = avio_rl32(pb);
418 if (size < sizeX - 40)
419 return AVERROR_INVALIDDATA;
420 st->codecpar->extradata_size = ffio_limit(pb, sizeX - 40);
421 st->codecpar->extradata = av_mallocz(st->codecpar->extradata_size +
422 AV_INPUT_BUFFER_PADDING_SIZE);
423 if (!st->codecpar->extradata)
424 return AVERROR(ENOMEM);
425 avio_read(pb, st->codecpar->extradata, st->codecpar->extradata_size);
428 /* Extract palette from extradata if bpp <= 8 */
429 /* This code assumes that extradata contains only palette */
430 /* This is true for all paletted codecs implemented in libavcodec */
431 if (st->codecpar->extradata_size && (st->codecpar->bits_per_coded_sample <= 8)) {
434 for (i = 0; i < FFMIN(st->codecpar->extradata_size, AVPALETTE_SIZE) / 4; i++)
435 asf_st->palette[i] = av_bswap32(((uint32_t *)st->codecpar->extradata)[i]);
437 memcpy(asf_st->palette, st->codecpar->extradata,
438 FFMIN(st->codecpar->extradata_size, AVPALETTE_SIZE));
440 asf_st->palette_changed = 1;
443 st->codecpar->codec_tag = tag1;
444 st->codecpar->codec_id = ff_codec_get_id(ff_codec_bmp_tags, tag1);
445 if (tag1 == MKTAG('D', 'V', 'R', ' ')) {
446 st->need_parsing = AVSTREAM_PARSE_FULL;
447 /* issue658 contains wrong w/h and MS even puts a fake seq header
448 * with wrong w/h in extradata while a correct one is in the stream.
449 * maximum lameness */
450 st->codecpar->width =
451 st->codecpar->height = 0;
452 av_freep(&st->codecpar->extradata);
453 st->codecpar->extradata_size = 0;
455 if (st->codecpar->codec_id == AV_CODEC_ID_H264)
456 st->need_parsing = AVSTREAM_PARSE_FULL_ONCE;
457 if (st->codecpar->codec_id == AV_CODEC_ID_MPEG4)
458 st->need_parsing = AVSTREAM_PARSE_FULL_ONCE;
460 pos2 = avio_tell(pb);
461 avio_skip(pb, size - (pos2 - pos1 + 24));
466 static int asf_read_ext_stream_properties(AVFormatContext *s, int64_t size)
468 ASFContext *asf = s->priv_data;
469 AVIOContext *pb = s->pb;
471 int ext_len, payload_ext_ct, stream_ct, i;
472 uint32_t leak_rate, stream_num;
473 unsigned int stream_languageid_index;
475 avio_rl64(pb); // starttime
476 avio_rl64(pb); // endtime
477 leak_rate = avio_rl32(pb); // leak-datarate
478 avio_rl32(pb); // bucket-datasize
479 avio_rl32(pb); // init-bucket-fullness
480 avio_rl32(pb); // alt-leak-datarate
481 avio_rl32(pb); // alt-bucket-datasize
482 avio_rl32(pb); // alt-init-bucket-fullness
483 avio_rl32(pb); // max-object-size
484 avio_rl32(pb); // flags (reliable,seekable,no_cleanpoints?,resend-live-cleanpoints, rest of bits reserved)
485 stream_num = avio_rl16(pb); // stream-num
487 stream_languageid_index = avio_rl16(pb); // stream-language-id-index
488 if (stream_num < 128)
489 asf->streams[stream_num].stream_language_index = stream_languageid_index;
491 avio_rl64(pb); // avg frametime in 100ns units
492 stream_ct = avio_rl16(pb); // stream-name-count
493 payload_ext_ct = avio_rl16(pb); // payload-extension-system-count
495 if (stream_num < 128) {
496 asf->stream_bitrates[stream_num] = leak_rate;
497 asf->streams[stream_num].payload_ext_ct = 0;
500 for (i = 0; i < stream_ct; i++) {
502 ext_len = avio_rl16(pb);
503 avio_skip(pb, ext_len);
506 for (i = 0; i < payload_ext_ct; i++) {
509 size = avio_rl16(pb);
510 ext_len = avio_rl32(pb);
512 return AVERROR_INVALIDDATA;
513 avio_skip(pb, ext_len);
514 if (stream_num < 128 && i < FF_ARRAY_ELEMS(asf->streams[stream_num].payload)) {
515 ASFPayload *p = &asf->streams[stream_num].payload[i];
518 av_log(s, AV_LOG_DEBUG, "Payload extension %x %d\n", g[0], p->size );
519 asf->streams[stream_num].payload_ext_ct ++;
526 static int asf_read_content_desc(AVFormatContext *s, int64_t size)
528 AVIOContext *pb = s->pb;
529 int len1, len2, len3, len4, len5;
531 len1 = avio_rl16(pb);
532 len2 = avio_rl16(pb);
533 len3 = avio_rl16(pb);
534 len4 = avio_rl16(pb);
535 len5 = avio_rl16(pb);
536 get_tag(s, "title", 0, len1, 32);
537 get_tag(s, "author", 0, len2, 32);
538 get_tag(s, "copyright", 0, len3, 32);
539 get_tag(s, "comment", 0, len4, 32);
545 static int asf_read_ext_content_desc(AVFormatContext *s, int64_t size)
547 AVIOContext *pb = s->pb;
548 ASFContext *asf = s->priv_data;
549 int desc_count, i, ret;
551 desc_count = avio_rl16(pb);
552 for (i = 0; i < desc_count; i++) {
553 int name_len, value_type, value_len;
556 name_len = avio_rl16(pb);
557 if (name_len % 2) // must be even, broken lavf versions wrote len-1
559 if ((ret = avio_get_str16le(pb, name_len, name, sizeof(name))) < name_len)
560 avio_skip(pb, name_len - ret);
561 value_type = avio_rl16(pb);
562 value_len = avio_rl16(pb);
563 if (!value_type && value_len % 2)
565 /* My sample has that stream set to 0 maybe that mean the container.
566 * ASF stream count starts at 1. I am using 0 to the container value
567 * since it's unused. */
568 if (!strcmp(name, "AspectRatioX"))
569 asf->dar[0].num = get_value(s->pb, value_type, 32);
570 else if (!strcmp(name, "AspectRatioY"))
571 asf->dar[0].den = get_value(s->pb, value_type, 32);
573 get_tag(s, name, value_type, value_len, 32);
579 static int asf_read_language_list(AVFormatContext *s, int64_t size)
581 AVIOContext *pb = s->pb;
582 ASFContext *asf = s->priv_data;
584 int stream_count = avio_rl16(pb);
585 for (j = 0; j < stream_count; j++) {
587 unsigned int lang_len = avio_r8(pb);
588 if ((ret = avio_get_str16le(pb, lang_len, lang,
589 sizeof(lang))) < lang_len)
590 avio_skip(pb, lang_len - ret);
592 av_strlcpy(asf->stream_languages[j], lang,
593 sizeof(*asf->stream_languages));
599 static int asf_read_metadata(AVFormatContext *s, int64_t size)
601 AVIOContext *pb = s->pb;
602 ASFContext *asf = s->priv_data;
603 int n, stream_num, name_len_utf16, name_len_utf8, value_len;
607 for (i = 0; i < n; i++) {
611 avio_rl16(pb); // lang_list_index
612 stream_num = avio_rl16(pb);
613 name_len_utf16 = avio_rl16(pb);
614 value_type = avio_rl16(pb); /* value_type */
615 value_len = avio_rl32(pb);
617 if (value_len < 0 || value_len > UINT16_MAX)
618 return AVERROR_INVALIDDATA;
620 name_len_utf8 = 2*name_len_utf16 + 1;
621 name = av_malloc(name_len_utf8);
623 return AVERROR(ENOMEM);
625 if ((ret = avio_get_str16le(pb, name_len_utf16, name, name_len_utf8)) < name_len_utf16)
626 avio_skip(pb, name_len_utf16 - ret);
627 av_log(s, AV_LOG_TRACE, "%d stream %d name_len %2d type %d len %4d <%s>\n",
628 i, stream_num, name_len_utf16, value_type, value_len, name);
630 if (!strcmp(name, "AspectRatioX")){
631 int aspect_x = get_value(s->pb, value_type, 16);
633 asf->dar[stream_num].num = aspect_x;
634 } else if(!strcmp(name, "AspectRatioY")){
635 int aspect_y = get_value(s->pb, value_type, 16);
637 asf->dar[stream_num].den = aspect_y;
639 get_tag(s, name, value_type, value_len, 16);
647 static int asf_read_marker(AVFormatContext *s, int64_t size)
649 AVIOContext *pb = s->pb;
650 ASFContext *asf = s->priv_data;
651 int i, count, name_len, ret;
654 avio_rl64(pb); // reserved 16 bytes
655 avio_rl64(pb); // ...
656 count = avio_rl32(pb); // markers count
657 avio_rl16(pb); // reserved 2 bytes
658 name_len = avio_rl16(pb); // name length
659 avio_skip(pb, name_len);
661 for (i = 0; i < count; i++) {
666 return AVERROR_INVALIDDATA;
668 avio_rl64(pb); // offset, 8 bytes
669 pres_time = avio_rl64(pb); // presentation time
670 pres_time -= asf->hdr.preroll * 10000;
671 avio_rl16(pb); // entry length
672 avio_rl32(pb); // send time
673 avio_rl32(pb); // flags
674 name_len = avio_rl32(pb); // name length
675 if ((unsigned)name_len > INT_MAX / 2)
676 return AVERROR_INVALIDDATA;
677 if ((ret = avio_get_str16le(pb, name_len * 2, name,
678 sizeof(name))) < name_len)
679 avio_skip(pb, name_len - ret);
680 avpriv_new_chapter(s, i, (AVRational) { 1, 10000000 }, pres_time,
681 AV_NOPTS_VALUE, name);
687 static int asf_read_header(AVFormatContext *s)
689 ASFContext *asf = s->priv_data;
691 AVIOContext *pb = s->pb;
696 if (ff_guidcmp(&g, &ff_asf_header))
697 return AVERROR_INVALIDDATA;
702 memset(&asf->asfid2avid, -1, sizeof(asf->asfid2avid));
704 for (i = 0; i<128; i++)
705 asf->streams[i].stream_language_index = 128; // invalid stream index means no language info
708 uint64_t gpos = avio_tell(pb);
711 gsize = avio_rl64(pb);
713 if (!ff_guidcmp(&g, &ff_asf_data_header)) {
714 asf->data_object_offset = avio_tell(pb);
715 /* If not streaming, gsize is not unlimited (how?),
716 * and there is enough space in the file.. */
717 if (!(asf->hdr.flags & 0x01) && gsize >= 100)
718 asf->data_object_size = gsize - 24;
720 asf->data_object_size = (uint64_t)-1;
724 return AVERROR_INVALIDDATA;
725 if (!ff_guidcmp(&g, &ff_asf_file_header)) {
726 ret = asf_read_file_properties(s, gsize);
727 } else if (!ff_guidcmp(&g, &ff_asf_stream_header)) {
728 ret = asf_read_stream_properties(s, gsize);
729 } else if (!ff_guidcmp(&g, &ff_asf_comment_header)) {
730 asf_read_content_desc(s, gsize);
731 } else if (!ff_guidcmp(&g, &ff_asf_language_guid)) {
732 asf_read_language_list(s, gsize);
733 } else if (!ff_guidcmp(&g, &ff_asf_extended_content_header)) {
734 asf_read_ext_content_desc(s, gsize);
735 } else if (!ff_guidcmp(&g, &ff_asf_metadata_header)) {
736 asf_read_metadata(s, gsize);
737 } else if (!ff_guidcmp(&g, &ff_asf_metadata_library_header)) {
738 asf_read_metadata(s, gsize);
739 } else if (!ff_guidcmp(&g, &ff_asf_ext_stream_header)) {
740 asf_read_ext_stream_properties(s, gsize);
742 // there could be an optional stream properties object to follow
743 // if so the next iteration will pick it up
745 } else if (!ff_guidcmp(&g, &ff_asf_head1_guid)) {
749 } else if (!ff_guidcmp(&g, &ff_asf_marker_header)) {
750 asf_read_marker(s, gsize);
751 } else if (avio_feof(pb)) {
755 if (!ff_guidcmp(&g, &ff_asf_content_encryption)) {
756 AVPacket *pkt = s->internal->parse_pkt;
758 av_log(s, AV_LOG_WARNING,
759 "DRM protected stream detected, decoding will likely fail!\n");
761 av_log(s, AV_LOG_DEBUG, "Secret data:\n");
763 if ((ret = av_get_packet(pb, pkt, len)) < 0)
765 av_hex_dump_log(s, AV_LOG_DEBUG, pkt->data, pkt->size);
766 av_packet_unref(pkt);
769 if (len > UINT16_MAX)
770 return AVERROR_INVALIDDATA;
771 get_tag(s, "ASF_Protection_Type", -1, len, 32);
774 if (len > UINT16_MAX)
775 return AVERROR_INVALIDDATA;
776 get_tag(s, "ASF_Key_ID", -1, len, 32);
779 if (len > UINT16_MAX)
780 return AVERROR_INVALIDDATA;
781 get_tag(s, "ASF_License_URL", -1, len, 32);
782 } else if (!ff_guidcmp(&g, &ff_asf_ext_content_encryption)) {
783 av_log(s, AV_LOG_WARNING,
784 "Ext DRM protected stream detected, decoding will likely fail!\n");
785 av_dict_set(&s->metadata, "encryption", "ASF Extended Content Encryption", 0);
786 } else if (!ff_guidcmp(&g, &ff_asf_digital_signature)) {
787 av_log(s, AV_LOG_INFO, "Digital signature detected!\n");
794 if (avio_tell(pb) != gpos + gsize)
795 av_log(s, AV_LOG_DEBUG,
796 "gpos mismatch our pos=%"PRIu64", end=%"PRId64"\n",
797 avio_tell(pb) - gpos, gsize);
798 avio_seek(pb, gpos + gsize, SEEK_SET);
806 asf->data_offset = avio_tell(pb);
807 asf->packet_size_left = 0;
809 for (i = 0; i < 128; i++) {
810 int stream_num = asf->asfid2avid[i];
811 if (stream_num >= 0) {
812 AVStream *st = s->streams[stream_num];
813 if (!st->codecpar->bit_rate)
814 st->codecpar->bit_rate = asf->stream_bitrates[i];
815 if (asf->dar[i].num > 0 && asf->dar[i].den > 0) {
816 av_reduce(&st->sample_aspect_ratio.num,
817 &st->sample_aspect_ratio.den,
818 asf->dar[i].num, asf->dar[i].den, INT_MAX);
819 } else if ((asf->dar[0].num > 0) && (asf->dar[0].den > 0) &&
820 // Use ASF container value if the stream doesn't set AR.
821 (st->codecpar->codec_type == AVMEDIA_TYPE_VIDEO))
822 av_reduce(&st->sample_aspect_ratio.num,
823 &st->sample_aspect_ratio.den,
824 asf->dar[0].num, asf->dar[0].den, INT_MAX);
826 av_log(s, AV_LOG_TRACE, "i=%d, st->codecpar->codec_type:%d, asf->dar %d:%d sar=%d:%d\n",
827 i, st->codecpar->codec_type, asf->dar[i].num, asf->dar[i].den,
828 st->sample_aspect_ratio.num, st->sample_aspect_ratio.den);
830 // copy and convert language codes to the frontend
831 if (asf->streams[i].stream_language_index < 128) {
832 const char *rfc1766 = asf->stream_languages[asf->streams[i].stream_language_index];
833 if (rfc1766 && strlen(rfc1766) > 1) {
834 const char primary_tag[3] = { rfc1766[0], rfc1766[1], '\0' }; // ignore country code if any
835 const char *iso6392 = ff_convert_lang_to(primary_tag,
836 AV_LANG_ISO639_2_BIBL);
838 av_dict_set(&st->metadata, "language", iso6392, 0);
844 ff_metadata_conv(&s->metadata, NULL, ff_asf_metadata_conv);
849 #define DO_2BITS(bits, var, defval) \
850 switch (bits & 3) { \
852 var = avio_rl32(pb); \
856 var = avio_rl16(pb); \
869 * Load a single ASF packet into the demuxer.
870 * @param s demux context
871 * @param pb context to read data from
872 * @return 0 on success, <0 on error
874 static int asf_get_packet(AVFormatContext *s, AVIOContext *pb)
876 ASFContext *asf = s->priv_data;
877 uint32_t packet_length, padsize;
881 if (asf->uses_std_ecc > 0) {
882 // if we do not know packet size, allow skipping up to 32 kB
884 if (asf->no_resync_search)
886 // else if (s->packet_size > 0 && !asf->uses_std_ecc)
887 // off = (avio_tell(pb) - s->internal->data_offset) % s->packet_size + 3;
894 if (c == 0x82 && !d && !e)
899 /* This code allows handling of -EAGAIN at packet boundaries (i.e.
900 * if the packet sync code above triggers -EAGAIN). This does not
901 * imply complete -EAGAIN handling support at random positions in
903 if (pb->error == AVERROR(EAGAIN))
904 return AVERROR(EAGAIN);
906 av_log(s, AV_LOG_ERROR,
907 "ff asf bad header %x at:%"PRId64"\n", c, avio_tell(pb));
909 if ((c & 0x8f) == 0x82) {
912 av_log(s, AV_LOG_ERROR, "ff asf bad non zero\n");
913 return AVERROR_INVALIDDATA;
918 } else if(!avio_feof(pb)) {
919 avio_seek(pb, -1, SEEK_CUR); // FIXME
928 avio_seek(pb, (c & 0xF) - 2, SEEK_CUR);
933 avpriv_request_sample(s, "Invalid ECC byte");
935 if (!asf->uses_std_ecc)
936 asf->uses_std_ecc = (c == 0x82 && !d && !e) ? 1 : -1;
940 asf->uses_std_ecc = -1;
944 asf->packet_flags = c;
945 asf->packet_property = d;
947 DO_2BITS(asf->packet_flags >> 5, packet_length, s->packet_size);
948 DO_2BITS(asf->packet_flags >> 1, padsize, 0); // sequence ignored
949 DO_2BITS(asf->packet_flags >> 3, padsize, 0); // padding length
951 // the following checks prevent overflows and infinite loops
952 if (!packet_length || packet_length >= (1U << 29)) {
953 av_log(s, AV_LOG_ERROR,
954 "invalid packet_length %"PRIu32" at:%"PRId64"\n",
955 packet_length, avio_tell(pb));
956 return AVERROR_INVALIDDATA;
958 if (padsize >= packet_length) {
959 av_log(s, AV_LOG_ERROR,
960 "invalid padsize %"PRIu32" at:%"PRId64"\n", padsize, avio_tell(pb));
961 return AVERROR_INVALIDDATA;
964 asf->packet_timestamp = avio_rl32(pb);
965 avio_rl16(pb); /* duration */
966 // rsize has at least 11 bytes which have to be present
968 if (asf->packet_flags & 0x01) {
969 asf->packet_segsizetype = avio_r8(pb);
971 asf->packet_segments = asf->packet_segsizetype & 0x3f;
973 asf->packet_segments = 1;
974 asf->packet_segsizetype = 0x80;
976 if (rsize > packet_length - padsize) {
977 asf->packet_size_left = 0;
978 av_log(s, AV_LOG_ERROR,
979 "invalid packet header length %d for pktlen %"PRIu32"-%"PRIu32" at %"PRId64"\n",
980 rsize, packet_length, padsize, avio_tell(pb));
981 return AVERROR_INVALIDDATA;
983 asf->packet_size_left = packet_length - padsize - rsize;
984 if (packet_length < asf->hdr.min_pktsize)
985 padsize += asf->hdr.min_pktsize - packet_length;
986 asf->packet_padsize = padsize;
987 av_log(s, AV_LOG_TRACE, "packet: size=%d padsize=%d left=%d\n",
988 s->packet_size, asf->packet_padsize, asf->packet_size_left);
994 * @return <0 if error
996 static int asf_read_frame_header(AVFormatContext *s, AVIOContext *pb)
998 ASFContext *asf = s->priv_data;
1001 int num = avio_r8(pb);
1003 int64_t ts0, ts1 av_unused;
1005 asf->packet_segments--;
1006 asf->packet_key_frame = num >> 7;
1007 asf->stream_index = asf->asfid2avid[num & 0x7f];
1008 asfst = &asf->streams[num & 0x7f];
1009 // sequence should be ignored!
1010 DO_2BITS(asf->packet_property >> 4, asf->packet_seq, 0);
1011 DO_2BITS(asf->packet_property >> 2, asf->packet_frag_offset, 0);
1012 DO_2BITS(asf->packet_property, asf->packet_replic_size, 0);
1013 av_log(asf, AV_LOG_TRACE, "key:%d stream:%d seq:%d offset:%d replic_size:%d num:%X packet_property %X\n",
1014 asf->packet_key_frame, asf->stream_index, asf->packet_seq,
1015 asf->packet_frag_offset, asf->packet_replic_size, num, asf->packet_property);
1016 if (rsize+(int64_t)asf->packet_replic_size > asf->packet_size_left) {
1017 av_log(s, AV_LOG_ERROR, "packet_replic_size %d is invalid\n", asf->packet_replic_size);
1018 return AVERROR_INVALIDDATA;
1020 if (asf->packet_replic_size >= 8) {
1021 int64_t end = avio_tell(pb) + asf->packet_replic_size;
1023 asfst->packet_obj_size = avio_rl32(pb);
1024 if (asfst->packet_obj_size >= (1 << 24) || asfst->packet_obj_size < 0) {
1025 av_log(s, AV_LOG_ERROR, "packet_obj_size %d invalid\n", asfst->packet_obj_size);
1026 asfst->packet_obj_size = 0;
1027 return AVERROR_INVALIDDATA;
1029 asf->packet_frag_timestamp = avio_rl32(pb); // timestamp
1031 for (i = 0; i < asfst->payload_ext_ct; i++) {
1032 ASFPayload *p = &asfst->payload[i];
1036 size = avio_rl16(pb);
1037 payend = avio_tell(pb) + size;
1039 av_log(s, AV_LOG_ERROR, "too long payload\n");
1044 // duration = avio_rl16(pb);
1047 aspect.num = avio_r8(pb);
1048 aspect.den = avio_r8(pb);
1049 if (aspect.num > 0 && aspect.den > 0 && asf->stream_index >= 0) {
1050 s->streams[asf->stream_index]->sample_aspect_ratio = aspect;
1055 ts0 = avio_rl64(pb);
1056 ts1 = avio_rl64(pb);
1057 if (ts0!= -1) asf->packet_frag_timestamp = ts0/10000;
1058 else asf->packet_frag_timestamp = AV_NOPTS_VALUE;
1069 avio_seek(pb, payend, SEEK_SET);
1072 avio_seek(pb, end, SEEK_SET);
1073 rsize += asf->packet_replic_size; // FIXME - check validity
1074 } else if (asf->packet_replic_size == 1) {
1075 // multipacket - frag_offset is beginning timestamp
1076 asf->packet_time_start = asf->packet_frag_offset;
1077 asf->packet_frag_offset = 0;
1078 asf->packet_frag_timestamp = asf->packet_timestamp;
1080 asf->packet_time_delta = avio_r8(pb);
1082 } else if (asf->packet_replic_size != 0) {
1083 av_log(s, AV_LOG_ERROR, "unexpected packet_replic_size of %d\n",
1084 asf->packet_replic_size);
1085 return AVERROR_INVALIDDATA;
1087 if (asf->packet_flags & 0x01) {
1088 DO_2BITS(asf->packet_segsizetype >> 6, asf->packet_frag_size, 0); // 0 is illegal
1089 if (rsize > asf->packet_size_left) {
1090 av_log(s, AV_LOG_ERROR, "packet_replic_size is invalid\n");
1091 return AVERROR_INVALIDDATA;
1092 } else if (asf->packet_frag_size > asf->packet_size_left - rsize) {
1093 if (asf->packet_frag_size > asf->packet_size_left - rsize + asf->packet_padsize) {
1094 av_log(s, AV_LOG_ERROR, "packet_frag_size is invalid (%d>%d-%d+%d)\n",
1095 asf->packet_frag_size, asf->packet_size_left, rsize, asf->packet_padsize);
1096 return AVERROR_INVALIDDATA;
1098 int diff = asf->packet_frag_size - (asf->packet_size_left - rsize);
1099 asf->packet_size_left += diff;
1100 asf->packet_padsize -= diff;
1104 asf->packet_frag_size = asf->packet_size_left - rsize;
1106 if (asf->packet_replic_size == 1) {
1107 asf->packet_multi_size = asf->packet_frag_size;
1108 if (asf->packet_multi_size > asf->packet_size_left)
1109 return AVERROR_INVALIDDATA;
1111 asf->packet_size_left -= rsize;
1117 * Parse data from individual ASF packets (which were previously loaded
1118 * with asf_get_packet()).
1119 * @param s demux context
1120 * @param pb context to read data from
1121 * @param pkt pointer to store packet data into
1122 * @return 0 if data was stored in pkt, <0 on error or 1 if more ASF
1123 * packets need to be loaded (through asf_get_packet())
1125 static int asf_parse_packet(AVFormatContext *s, AVIOContext *pb, AVPacket *pkt)
1127 ASFContext *asf = s->priv_data;
1128 ASFStream *asf_st = 0;
1133 if (asf->packet_size_left < FRAME_HEADER_SIZE ||
1134 asf->packet_segments < 1 && asf->packet_time_start == 0) {
1135 int ret = asf->packet_size_left + asf->packet_padsize;
1137 if (asf->packet_size_left && asf->packet_size_left < FRAME_HEADER_SIZE)
1138 av_log(s, AV_LOG_WARNING, "Skip due to FRAME_HEADER_SIZE\n");
1144 asf->packet_pos = avio_tell(pb);
1145 if (asf->data_object_size != (uint64_t)-1 &&
1146 (asf->packet_pos - asf->data_object_offset >= asf->data_object_size))
1147 return AVERROR_EOF; /* Do not exceed the size of the data object */
1150 if (asf->packet_time_start == 0) {
1151 if (asf_read_frame_header(s, pb) < 0) {
1152 asf->packet_time_start = asf->packet_segments = 0;
1155 if (asf->stream_index < 0 ||
1156 s->streams[asf->stream_index]->discard >= AVDISCARD_ALL ||
1157 (!asf->packet_key_frame &&
1158 (s->streams[asf->stream_index]->discard >= AVDISCARD_NONKEY || asf->streams[s->streams[asf->stream_index]->id].skip_to_key))) {
1159 asf->packet_time_start = 0;
1160 /* unhandled packet (should not happen) */
1161 avio_skip(pb, asf->packet_frag_size);
1162 asf->packet_size_left -= asf->packet_frag_size;
1163 if (asf->stream_index < 0)
1164 av_log(s, AV_LOG_ERROR, "ff asf skip %d (unknown stream)\n",
1165 asf->packet_frag_size);
1168 asf->asf_st = &asf->streams[s->streams[asf->stream_index]->id];
1169 if (!asf->packet_frag_offset)
1170 asf->asf_st->skip_to_key = 0;
1172 asf_st = asf->asf_st;
1175 if (!asf_st->frag_offset && asf->packet_frag_offset) {
1176 av_log(s, AV_LOG_TRACE, "skipping asf data pkt with fragment offset for "
1177 "stream:%d, expected:%d but got %d from pkt)\n",
1178 asf->stream_index, asf_st->frag_offset,
1179 asf->packet_frag_offset);
1180 avio_skip(pb, asf->packet_frag_size);
1181 asf->packet_size_left -= asf->packet_frag_size;
1185 if (asf->packet_replic_size == 1) {
1186 // frag_offset is here used as the beginning timestamp
1187 asf->packet_frag_timestamp = asf->packet_time_start;
1188 asf->packet_time_start += asf->packet_time_delta;
1189 asf_st->packet_obj_size = asf->packet_frag_size = avio_r8(pb);
1190 asf->packet_size_left--;
1191 asf->packet_multi_size--;
1192 if (asf->packet_multi_size < asf_st->packet_obj_size) {
1193 asf->packet_time_start = 0;
1194 avio_skip(pb, asf->packet_multi_size);
1195 asf->packet_size_left -= asf->packet_multi_size;
1198 asf->packet_multi_size -= asf_st->packet_obj_size;
1201 if (asf_st->pkt.size != asf_st->packet_obj_size ||
1202 // FIXME is this condition sufficient?
1203 asf_st->frag_offset + asf->packet_frag_size > asf_st->pkt.size) {
1206 if (asf_st->pkt.data) {
1207 av_log(s, AV_LOG_INFO,
1208 "freeing incomplete packet size %d, new %d\n",
1209 asf_st->pkt.size, asf_st->packet_obj_size);
1210 asf_st->frag_offset = 0;
1211 av_packet_unref(&asf_st->pkt);
1214 if ((ret = av_new_packet(&asf_st->pkt, asf_st->packet_obj_size)) < 0)
1216 asf_st->seq = asf->packet_seq;
1217 if (asf->ts_is_pts) {
1218 asf_st->pkt.pts = asf->packet_frag_timestamp - asf->hdr.preroll;
1220 asf_st->pkt.dts = asf->packet_frag_timestamp - asf->hdr.preroll;
1221 asf_st->pkt.stream_index = asf->stream_index;
1222 asf_st->pkt.pos = asf_st->packet_pos = asf->packet_pos;
1223 asf_st->pkt_clean = 0;
1225 if (asf_st->pkt.data && asf_st->palette_changed) {
1227 pal = av_packet_new_side_data(&asf_st->pkt, AV_PKT_DATA_PALETTE,
1230 av_log(s, AV_LOG_ERROR, "Cannot append palette to packet\n");
1232 memcpy(pal, asf_st->palette, AVPALETTE_SIZE);
1233 asf_st->palette_changed = 0;
1236 av_log(asf, AV_LOG_TRACE, "new packet: stream:%d key:%d packet_key:%d audio:%d size:%d\n",
1237 asf->stream_index, asf->packet_key_frame,
1238 asf_st->pkt.flags & AV_PKT_FLAG_KEY,
1239 s->streams[asf->stream_index]->codecpar->codec_type == AVMEDIA_TYPE_AUDIO,
1240 asf_st->packet_obj_size);
1241 if (s->streams[asf->stream_index]->codecpar->codec_type == AVMEDIA_TYPE_AUDIO)
1242 asf->packet_key_frame = 1;
1243 if (asf->packet_key_frame)
1244 asf_st->pkt.flags |= AV_PKT_FLAG_KEY;
1248 av_log(asf, AV_LOG_TRACE, "READ PACKET s:%d os:%d o:%d,%d l:%d DATA:%p\n",
1249 s->packet_size, asf_st->pkt.size, asf->packet_frag_offset,
1250 asf_st->frag_offset, asf->packet_frag_size, asf_st->pkt.data);
1251 asf->packet_size_left -= asf->packet_frag_size;
1252 if (asf->packet_size_left < 0)
1255 if (asf->packet_frag_offset >= asf_st->pkt.size ||
1256 asf->packet_frag_size > asf_st->pkt.size - asf->packet_frag_offset) {
1257 av_log(s, AV_LOG_ERROR,
1258 "packet fragment position invalid %u,%u not in %u\n",
1259 asf->packet_frag_offset, asf->packet_frag_size,
1264 if (asf->packet_frag_offset != asf_st->frag_offset && !asf_st->pkt_clean) {
1265 memset(asf_st->pkt.data + asf_st->frag_offset, 0, asf_st->pkt.size - asf_st->frag_offset);
1266 asf_st->pkt_clean = 1;
1269 ret = avio_read(pb, asf_st->pkt.data + asf->packet_frag_offset,
1270 asf->packet_frag_size);
1271 if (ret != asf->packet_frag_size) {
1272 if (ret < 0 || asf->packet_frag_offset + ret == 0)
1273 return ret < 0 ? ret : AVERROR_EOF;
1275 if (asf_st->ds_span > 1) {
1276 // scrambling, we can either drop it completely or fill the remainder
1277 // TODO: should we fill the whole packet instead of just the current
1279 memset(asf_st->pkt.data + asf->packet_frag_offset + ret, 0,
1280 asf->packet_frag_size - ret);
1281 ret = asf->packet_frag_size;
1283 // no scrambling, so we can return partial packets
1284 av_shrink_packet(&asf_st->pkt, asf->packet_frag_offset + ret);
1287 if (s->key && s->keylen == 20)
1288 ff_asfcrypt_dec(s->key, asf_st->pkt.data + asf->packet_frag_offset,
1290 asf_st->frag_offset += ret;
1291 /* test if whole packet is read */
1292 if (asf_st->frag_offset == asf_st->pkt.size) {
1293 // workaround for macroshit radio DVR-MS files
1294 if (s->streams[asf->stream_index]->codecpar->codec_id == AV_CODEC_ID_MPEG2VIDEO &&
1295 asf_st->pkt.size > 100) {
1297 for (i = 0; i < asf_st->pkt.size && !asf_st->pkt.data[i]; i++)
1299 if (i == asf_st->pkt.size) {
1300 av_log(s, AV_LOG_DEBUG, "discarding ms fart\n");
1301 asf_st->frag_offset = 0;
1302 av_packet_unref(&asf_st->pkt);
1308 if (asf_st->ds_span > 1) {
1309 if (asf_st->pkt.size != asf_st->ds_packet_size * asf_st->ds_span) {
1310 av_log(s, AV_LOG_ERROR,
1311 "pkt.size != ds_packet_size * ds_span (%d %d %d)\n",
1312 asf_st->pkt.size, asf_st->ds_packet_size,
1315 /* packet descrambling */
1316 AVBufferRef *buf = av_buffer_alloc(asf_st->pkt.size +
1317 AV_INPUT_BUFFER_PADDING_SIZE);
1319 uint8_t *newdata = buf->data;
1321 memset(newdata + asf_st->pkt.size, 0,
1322 AV_INPUT_BUFFER_PADDING_SIZE);
1323 while (offset < asf_st->pkt.size) {
1324 int off = offset / asf_st->ds_chunk_size;
1325 int row = off / asf_st->ds_span;
1326 int col = off % asf_st->ds_span;
1327 int idx = row + col * asf_st->ds_packet_size / asf_st->ds_chunk_size;
1328 assert(offset + asf_st->ds_chunk_size <= asf_st->pkt.size);
1329 assert(idx + 1 <= asf_st->pkt.size / asf_st->ds_chunk_size);
1330 memcpy(newdata + offset,
1331 asf_st->pkt.data + idx * asf_st->ds_chunk_size,
1332 asf_st->ds_chunk_size);
1333 offset += asf_st->ds_chunk_size;
1335 av_buffer_unref(&asf_st->pkt.buf);
1336 asf_st->pkt.buf = buf;
1337 asf_st->pkt.data = buf->data;
1341 asf_st->frag_offset = 0;
1343 asf_st->pkt.buf = 0;
1344 asf_st->pkt.size = 0;
1345 asf_st->pkt.data = 0;
1346 asf_st->pkt.side_data_elems = 0;
1347 asf_st->pkt.side_data = NULL;
1348 break; // packet completed
1354 static int asf_read_packet(AVFormatContext *s, AVPacket *pkt)
1356 ASFContext *asf = s->priv_data;
1361 /* parse cached packets, if any */
1362 if ((ret = asf_parse_packet(s, s->pb, pkt)) <= 0)
1364 if ((ret = asf_get_packet(s, s->pb)) < 0)
1365 assert(asf->packet_size_left < FRAME_HEADER_SIZE ||
1366 asf->packet_segments < 1);
1367 asf->packet_time_start = 0;
1371 // Added to support seeking after packets have been read
1372 // If information is not reset, read_packet fails due to
1373 // leftover information from previous reads
1374 static void asf_reset_header(AVFormatContext *s)
1376 ASFContext *asf = s->priv_data;
1380 asf->packet_size_left = 0;
1381 asf->packet_flags = 0;
1382 asf->packet_property = 0;
1383 asf->packet_timestamp = 0;
1384 asf->packet_segsizetype = 0;
1385 asf->packet_segments = 0;
1386 asf->packet_seq = 0;
1387 asf->packet_replic_size = 0;
1388 asf->packet_key_frame = 0;
1389 asf->packet_padsize = 0;
1390 asf->packet_frag_offset = 0;
1391 asf->packet_frag_size = 0;
1392 asf->packet_frag_timestamp = 0;
1393 asf->packet_multi_size = 0;
1394 asf->packet_time_delta = 0;
1395 asf->packet_time_start = 0;
1397 for (i = 0; i < 128; i++) {
1398 asf_st = &asf->streams[i];
1399 av_packet_unref(&asf_st->pkt);
1400 asf_st->packet_obj_size = 0;
1401 asf_st->frag_offset = 0;
1407 static void skip_to_key(AVFormatContext *s)
1409 ASFContext *asf = s->priv_data;
1412 for (i = 0; i < 128; i++) {
1413 int j = asf->asfid2avid[i];
1414 ASFStream *asf_st = &asf->streams[i];
1415 if (j < 0 || s->streams[j]->codecpar->codec_type != AVMEDIA_TYPE_VIDEO)
1418 asf_st->skip_to_key = 1;
1422 static int asf_read_close(AVFormatContext *s)
1424 asf_reset_header(s);
1429 static int64_t asf_read_pts(AVFormatContext *s, int stream_index,
1430 int64_t *ppos, int64_t pos_limit)
1432 ASFContext *asf = s->priv_data;
1433 AVPacket pkt1, *pkt = &pkt1;
1436 int64_t pos = *ppos;
1438 int64_t start_pos[ASF_MAX_STREAMS];
1440 for (i = 0; i < s->nb_streams; i++)
1443 if (s->packet_size > 0)
1444 pos = (pos + s->packet_size - 1 - s->internal->data_offset) /
1445 s->packet_size * s->packet_size +
1446 s->internal->data_offset;
1448 if (avio_seek(s->pb, pos, SEEK_SET) < 0)
1449 return AV_NOPTS_VALUE;
1451 ff_read_frame_flush(s);
1452 asf_reset_header(s);
1454 if (av_read_frame(s, pkt) < 0) {
1455 av_log(s, AV_LOG_INFO, "asf_read_pts failed\n");
1456 return AV_NOPTS_VALUE;
1461 if (pkt->flags & AV_PKT_FLAG_KEY) {
1462 i = pkt->stream_index;
1464 asf_st = &asf->streams[s->streams[i]->id];
1466 // assert((asf_st->packet_pos - s->data_offset) % s->packet_size == 0);
1467 pos = asf_st->packet_pos;
1468 av_assert1(pkt->pos == asf_st->packet_pos);
1470 av_add_index_entry(s->streams[i], pos, pts, pkt->size,
1471 pos - start_pos[i] + 1, AVINDEX_KEYFRAME);
1472 start_pos[i] = asf_st->packet_pos + 1;
1474 if (pkt->stream_index == stream_index) {
1475 av_packet_unref(pkt);
1479 av_packet_unref(pkt);
1486 static int asf_build_simple_index(AVFormatContext *s, int stream_index)
1489 ASFContext *asf = s->priv_data;
1490 int64_t current_pos = avio_tell(s->pb);
1493 if((ret = avio_seek(s->pb, asf->data_object_offset + asf->data_object_size, SEEK_SET)) < 0) {
1497 if ((ret = ff_get_guid(s->pb, &g)) < 0)
1500 /* the data object can be followed by other top-level objects,
1501 * skip them until the simple index object is reached */
1502 while (ff_guidcmp(&g, &ff_asf_simple_index_header)) {
1503 int64_t gsize = avio_rl64(s->pb);
1504 if (gsize < 24 || avio_feof(s->pb)) {
1507 avio_skip(s->pb, gsize - 24);
1508 if ((ret = ff_get_guid(s->pb, &g)) < 0)
1513 int64_t itime, last_pos = -1;
1516 int64_t av_unused gsize = avio_rl64(s->pb);
1517 if ((ret = ff_get_guid(s->pb, &g)) < 0)
1519 itime = avio_rl64(s->pb);
1520 pct = avio_rl32(s->pb);
1521 ict = avio_rl32(s->pb);
1522 av_log(s, AV_LOG_DEBUG,
1523 "itime:0x%"PRIx64", pct:%d, ict:%d\n", itime, pct, ict);
1525 for (i = 0; i < ict; i++) {
1526 int pktnum = avio_rl32(s->pb);
1527 int pktct = avio_rl16(s->pb);
1528 int64_t pos = s->internal->data_offset + s->packet_size * (int64_t)pktnum;
1529 int64_t index_pts = FFMAX(av_rescale(itime, i, 10000) - asf->hdr.preroll, 0);
1531 if (avio_feof(s->pb)) {
1532 ret = AVERROR_INVALIDDATA;
1536 if (pos != last_pos) {
1537 av_log(s, AV_LOG_DEBUG, "pktnum:%d, pktct:%d pts: %"PRId64"\n",
1538 pktnum, pktct, index_pts);
1539 av_add_index_entry(s->streams[stream_index], pos, index_pts,
1540 s->packet_size, 0, AVINDEX_KEYFRAME);
1544 asf->index_read = ict > 1;
1547 // if (avio_feof(s->pb)) {
1550 avio_seek(s->pb, current_pos, SEEK_SET);
1554 static int asf_read_seek(AVFormatContext *s, int stream_index,
1555 int64_t pts, int flags)
1557 ASFContext *asf = s->priv_data;
1558 AVStream *st = s->streams[stream_index];
1561 if (s->packet_size <= 0)
1564 /* Try using the protocol's read_seek if available */
1566 int64_t ret = avio_seek_time(s->pb, stream_index, pts, flags);
1568 asf_reset_header(s);
1569 if (ret != AVERROR(ENOSYS))
1573 /* explicitly handle the case of seeking to 0 */
1575 asf_reset_header(s);
1576 avio_seek(s->pb, s->internal->data_offset, SEEK_SET);
1580 if (!asf->index_read) {
1581 ret = asf_build_simple_index(s, stream_index);
1583 asf->index_read = -1;
1586 if (asf->index_read > 0 && st->internal->index_entries) {
1587 int index = av_index_search_timestamp(st, pts, flags);
1589 /* find the position */
1590 uint64_t pos = st->internal->index_entries[index].pos;
1593 av_log(s, AV_LOG_DEBUG, "SEEKTO: %"PRId64"\n", pos);
1594 if(avio_seek(s->pb, pos, SEEK_SET) < 0)
1596 asf_reset_header(s);
1601 /* no index or seeking by index failed */
1602 if (ff_seek_frame_binary(s, stream_index, pts, flags) < 0)
1604 asf_reset_header(s);
1609 AVInputFormat ff_asf_demuxer = {
1611 .long_name = NULL_IF_CONFIG_SMALL("ASF (Advanced / Active Streaming Format)"),
1612 .priv_data_size = sizeof(ASFContext),
1613 .read_probe = asf_probe,
1614 .read_header = asf_read_header,
1615 .read_packet = asf_read_packet,
1616 .read_close = asf_read_close,
1617 .read_seek = asf_read_seek,
1618 .read_timestamp = asf_read_pts,
1619 .flags = AVFMT_NOBINSEARCH | AVFMT_NOGENSEARCH,
1620 .priv_class = &asf_class,