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
22 #include "libavutil/attributes.h"
23 #include "libavutil/avassert.h"
24 #include "libavutil/avstring.h"
25 #include "libavutil/bswap.h"
26 #include "libavutil/common.h"
27 #include "libavutil/dict.h"
28 #include "libavutil/internal.h"
29 #include "libavutil/mathematics.h"
30 #include "libavutil/opt.h"
32 #include "avio_internal.h"
33 #include "avlanguage.h"
42 int asfid2avid[128]; ///< conversion table from asf ID 2 AVStream ID
43 ASFStream streams[128]; ///< it's max number and it's not that big
44 uint32_t stream_bitrates[128]; ///< max number of streams, bitrate for each (for streaming)
46 char stream_languages[128][6]; ///< max number of streams, language for each (RFC1766, e.g. en-US)
47 /* non streamed additonnal info */
50 /* only for reading */
51 uint64_t data_offset; ///< beginning of the first data packet
52 uint64_t data_object_offset; ///< data object offset (excl. GUID & size)
53 uint64_t data_object_size; ///< size of the data object
61 int packet_segsizetype;
64 int packet_replic_size;
67 unsigned int packet_frag_offset;
68 unsigned int packet_frag_size;
69 int64_t packet_frag_timestamp;
70 int packet_multi_size;
71 int packet_time_delta;
72 int packet_time_start;
77 ASFStream *asf_st; ///< currently decoded stream
82 static const AVOption options[] = {
83 { "no_resync_search", "Don't try to resynchronize by looking for a certain optional start code", offsetof(ASFContext, no_resync_search), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, AV_OPT_FLAG_DECODING_PARAM },
87 static const AVClass asf_class = {
88 .class_name = "asf demuxer",
89 .item_name = av_default_item_name,
91 .version = LIBAVUTIL_VERSION_INT,
97 #define ASF_MAX_STREAMS 127
98 #define FRAME_HEADER_SIZE 16
99 // Fix Me! FRAME_HEADER_SIZE may be different. (17 is known to be too large)
102 static const ff_asf_guid stream_bitrate_guid = { /* (http://get.to/sdp) */
103 0xce, 0x75, 0xf8, 0x7b, 0x8d, 0x46, 0xd1, 0x11, 0x8d, 0x82, 0x00, 0x60, 0x97, 0xc9, 0xa2, 0xb2
106 #define PRINT_IF_GUID(g, cmp) \
107 if (!ff_guidcmp(g, &cmp)) \
108 av_dlog(NULL, "(GUID: %s) ", # cmp)
110 static void print_guid(ff_asf_guid *g)
113 PRINT_IF_GUID(g, ff_asf_header);
114 else PRINT_IF_GUID(g, ff_asf_file_header);
115 else PRINT_IF_GUID(g, ff_asf_stream_header);
116 else PRINT_IF_GUID(g, ff_asf_audio_stream);
117 else PRINT_IF_GUID(g, ff_asf_audio_conceal_none);
118 else PRINT_IF_GUID(g, ff_asf_video_stream);
119 else PRINT_IF_GUID(g, ff_asf_video_conceal_none);
120 else PRINT_IF_GUID(g, ff_asf_command_stream);
121 else PRINT_IF_GUID(g, ff_asf_comment_header);
122 else PRINT_IF_GUID(g, ff_asf_codec_comment_header);
123 else PRINT_IF_GUID(g, ff_asf_codec_comment1_header);
124 else PRINT_IF_GUID(g, ff_asf_data_header);
125 else PRINT_IF_GUID(g, ff_asf_simple_index_header);
126 else PRINT_IF_GUID(g, ff_asf_head1_guid);
127 else PRINT_IF_GUID(g, ff_asf_head2_guid);
128 else PRINT_IF_GUID(g, ff_asf_my_guid);
129 else PRINT_IF_GUID(g, ff_asf_ext_stream_header);
130 else PRINT_IF_GUID(g, ff_asf_extended_content_header);
131 else PRINT_IF_GUID(g, ff_asf_ext_stream_embed_stream_header);
132 else PRINT_IF_GUID(g, ff_asf_ext_stream_audio_stream);
133 else PRINT_IF_GUID(g, ff_asf_metadata_header);
134 else PRINT_IF_GUID(g, ff_asf_metadata_library_header);
135 else PRINT_IF_GUID(g, ff_asf_marker_header);
136 else PRINT_IF_GUID(g, stream_bitrate_guid);
137 else PRINT_IF_GUID(g, ff_asf_language_guid);
139 av_dlog(NULL, "(GUID: unknown) ");
140 for (i = 0; i < 16; i++)
141 av_dlog(NULL, " 0x%02x,", (*g)[i]);
142 av_dlog(NULL, "}\n");
146 #define print_guid(g)
149 static int asf_probe(AVProbeData *pd)
151 /* check file header */
152 if (!ff_guidcmp(pd->buf, &ff_asf_header))
153 return AVPROBE_SCORE_MAX;
158 /* size of type 2 (BOOL) is 32bit for "Extended Content Description Object"
159 * but 16 bit for "Metadata Object" and "Metadata Library Object" */
160 static int get_value(AVIOContext *pb, int type, int type2_size)
164 return (type2_size == 32) ? avio_rl32(pb) : avio_rl16(pb);
166 return avio_rl32(pb);
168 return avio_rl64(pb);
170 return avio_rl16(pb);
176 /* MSDN claims that this should be "compatible with the ID3 frame, APIC",
177 * but in reality this is only loosely similar */
178 static int asf_read_picture(AVFormatContext *s, int len)
180 AVPacket pkt = { 0 };
181 const CodecMime *mime = ff_id3v2_mime_tags;
182 enum AVCodecID id = AV_CODEC_ID_NONE;
184 uint8_t *desc = NULL;
186 int ret, type, picsize, desc_len;
188 /* type + picsize + mime + desc */
189 if (len < 1 + 4 + 2 + 2) {
190 av_log(s, AV_LOG_ERROR, "Invalid attached picture size: %d.\n", len);
191 return AVERROR_INVALIDDATA;
195 type = avio_r8(s->pb);
197 if (type >= FF_ARRAY_ELEMS(ff_id3v2_picture_types) || type < 0) {
198 av_log(s, AV_LOG_WARNING, "Unknown attached picture type: %d.\n", type);
202 /* picture data size */
203 picsize = avio_rl32(s->pb);
206 /* picture MIME type */
207 len -= avio_get_str16le(s->pb, len, mimetype, sizeof(mimetype));
208 while (mime->id != AV_CODEC_ID_NONE) {
209 if (!strncmp(mime->str, mimetype, sizeof(mimetype))) {
215 if (id == AV_CODEC_ID_NONE) {
216 av_log(s, AV_LOG_ERROR, "Unknown attached picture mimetype: %s.\n",
221 if (picsize >= len) {
222 av_log(s, AV_LOG_ERROR, "Invalid attached picture data size: %d >= %d.\n",
224 return AVERROR_INVALIDDATA;
227 /* picture description */
228 desc_len = (len - picsize) * 2 + 1;
229 desc = av_malloc(desc_len);
231 return AVERROR(ENOMEM);
232 len -= avio_get_str16le(s->pb, len - picsize, desc, desc_len);
234 ret = av_get_packet(s->pb, &pkt, picsize);
238 st = avformat_new_stream(s, NULL);
240 ret = AVERROR(ENOMEM);
243 st->disposition |= AV_DISPOSITION_ATTACHED_PIC;
244 st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
245 st->codec->codec_id = id;
246 st->attached_pic = pkt;
247 st->attached_pic.stream_index = st->index;
248 st->attached_pic.flags |= AV_PKT_FLAG_KEY;
251 av_dict_set(&st->metadata, "title", desc, AV_DICT_DONT_STRDUP_VAL);
255 av_dict_set(&st->metadata, "comment", ff_id3v2_picture_types[type], 0);
261 av_free_packet(&pkt);
265 static void get_id3_tag(AVFormatContext *s, int len)
267 ID3v2ExtraMeta *id3v2_extra_meta = NULL;
269 ff_id3v2_read(s, ID3v2_DEFAULT_MAGIC, &id3v2_extra_meta);
270 if (id3v2_extra_meta)
271 ff_id3v2_parse_apic(s, &id3v2_extra_meta);
272 ff_id3v2_free_extra_meta(&id3v2_extra_meta);
275 static void get_tag(AVFormatContext *s, const char *key, int type, int len, int type2_size)
278 int64_t off = avio_tell(s->pb);
281 if ((unsigned)len >= (UINT_MAX - LEN) / 2)
284 value = av_malloc(2 * len + LEN);
288 if (type == 0) { // UTF16-LE
289 avio_get_str16le(s->pb, len, value, 2 * len + 1);
290 } else if (type == -1) { // ASCII
291 avio_read(s->pb, value, len);
293 } else if (type == 1) { // byte array
294 if (!strcmp(key, "WM/Picture")) { // handle cover art
295 asf_read_picture(s, len);
296 } else if (!strcmp(key, "ID3")) { // handle ID3 tag
299 av_log(s, AV_LOG_VERBOSE, "Unsupported byte array in tag %s.\n", key);
302 } else if (type > 1 && type <= 5) { // boolean or DWORD or QWORD or WORD
303 uint64_t num = get_value(s->pb, type, type2_size);
304 snprintf(value, LEN, "%"PRIu64, num);
305 } else if (type == 6) { // (don't) handle GUID
306 av_log(s, AV_LOG_DEBUG, "Unsupported GUID value in tag %s.\n", key);
309 av_log(s, AV_LOG_DEBUG,
310 "Unsupported value type %d in tag %s.\n", type, key);
314 av_dict_set(&s->metadata, key, value, 0);
318 avio_seek(s->pb, off + len, SEEK_SET);
321 static int asf_read_file_properties(AVFormatContext *s, int64_t size)
323 ASFContext *asf = s->priv_data;
324 AVIOContext *pb = s->pb;
326 ff_get_guid(pb, &asf->hdr.guid);
327 asf->hdr.file_size = avio_rl64(pb);
328 asf->hdr.create_time = avio_rl64(pb);
329 avio_rl64(pb); /* number of packets */
330 asf->hdr.play_time = avio_rl64(pb);
331 asf->hdr.send_time = avio_rl64(pb);
332 asf->hdr.preroll = avio_rl32(pb);
333 asf->hdr.ignore = avio_rl32(pb);
334 asf->hdr.flags = avio_rl32(pb);
335 asf->hdr.min_pktsize = avio_rl32(pb);
336 asf->hdr.max_pktsize = avio_rl32(pb);
337 if (asf->hdr.min_pktsize >= (1U << 29))
338 return AVERROR_INVALIDDATA;
339 asf->hdr.max_bitrate = avio_rl32(pb);
340 s->packet_size = asf->hdr.max_pktsize;
345 static int asf_read_stream_properties(AVFormatContext *s, int64_t size)
347 ASFContext *asf = s->priv_data;
348 AVIOContext *pb = s->pb;
352 enum AVMediaType type;
353 int type_specific_size, sizeX;
355 int64_t pos1, pos2, start_time;
356 int test_for_ext_stream_audio, is_dvr_ms_audio = 0;
358 if (s->nb_streams == ASF_MAX_STREAMS) {
359 av_log(s, AV_LOG_ERROR, "too many streams\n");
360 return AVERROR(EINVAL);
363 pos1 = avio_tell(pb);
365 st = avformat_new_stream(s, NULL);
367 return AVERROR(ENOMEM);
368 avpriv_set_pts_info(st, 32, 1, 1000); /* 32 bit pts in ms */
369 start_time = asf->hdr.preroll;
371 if (!(asf->hdr.flags & 0x01)) { // if we aren't streaming...
372 int64_t fsize = avio_size(pb);
373 if (fsize <= 0 || (int64_t)asf->hdr.file_size <= 0 || FFABS(fsize - (int64_t)asf->hdr.file_size) < 10000)
374 st->duration = asf->hdr.play_time /
375 (10000000 / 1000) - start_time;
379 test_for_ext_stream_audio = 0;
380 if (!ff_guidcmp(&g, &ff_asf_audio_stream)) {
381 type = AVMEDIA_TYPE_AUDIO;
382 } else if (!ff_guidcmp(&g, &ff_asf_video_stream)) {
383 type = AVMEDIA_TYPE_VIDEO;
384 } else if (!ff_guidcmp(&g, &ff_asf_jfif_media)) {
385 type = AVMEDIA_TYPE_VIDEO;
386 st->codec->codec_id = AV_CODEC_ID_MJPEG;
387 } else if (!ff_guidcmp(&g, &ff_asf_command_stream)) {
388 type = AVMEDIA_TYPE_DATA;
389 } else if (!ff_guidcmp(&g, &ff_asf_ext_stream_embed_stream_header)) {
390 test_for_ext_stream_audio = 1;
391 type = AVMEDIA_TYPE_UNKNOWN;
396 avio_skip(pb, 8); /* total_size */
397 type_specific_size = avio_rl32(pb);
399 st->id = avio_rl16(pb) & 0x7f; /* stream id */
400 // mapping of asf ID to AV stream ID;
401 asf->asfid2avid[st->id] = s->nb_streams - 1;
402 asf_st = &asf->streams[st->id];
406 if (test_for_ext_stream_audio) {
408 if (!ff_guidcmp(&g, &ff_asf_ext_stream_audio_stream)) {
409 type = AVMEDIA_TYPE_AUDIO;
420 st->codec->codec_type = type;
421 if (type == AVMEDIA_TYPE_AUDIO) {
422 int ret = ff_get_wav_header(pb, st->codec, type_specific_size);
425 if (is_dvr_ms_audio) {
426 // codec_id and codec_tag are unreliable in dvr_ms
427 // files. Set them later by probing stream.
428 st->request_probe = 1;
429 st->codec->codec_tag = 0;
431 if (st->codec->codec_id == AV_CODEC_ID_AAC)
432 st->need_parsing = AVSTREAM_PARSE_NONE;
434 st->need_parsing = AVSTREAM_PARSE_FULL;
435 /* We have to init the frame size at some point .... */
436 pos2 = avio_tell(pb);
437 if (size >= (pos2 + 8 - pos1 + 24)) {
438 asf_st->ds_span = avio_r8(pb);
439 asf_st->ds_packet_size = avio_rl16(pb);
440 asf_st->ds_chunk_size = avio_rl16(pb);
441 avio_rl16(pb); // ds_data_size
442 avio_r8(pb); // ds_silence_data
444 if (asf_st->ds_span > 1) {
445 if (!asf_st->ds_chunk_size ||
446 (asf_st->ds_packet_size / asf_st->ds_chunk_size <= 1) ||
447 asf_st->ds_packet_size % asf_st->ds_chunk_size)
448 asf_st->ds_span = 0; // disable descrambling
450 } else if (type == AVMEDIA_TYPE_VIDEO &&
451 size - (avio_tell(pb) - pos1 + 24) >= 51) {
455 avio_rl16(pb); /* size */
456 sizeX = avio_rl32(pb); /* size */
457 st->codec->width = avio_rl32(pb);
458 st->codec->height = avio_rl32(pb);
459 /* not available for asf */
460 avio_rl16(pb); /* panes */
461 st->codec->bits_per_coded_sample = avio_rl16(pb); /* depth */
462 tag1 = avio_rl32(pb);
465 st->codec->extradata_size = ffio_limit(pb, sizeX - 40);
466 st->codec->extradata = av_mallocz(st->codec->extradata_size +
467 FF_INPUT_BUFFER_PADDING_SIZE);
468 if (!st->codec->extradata)
469 return AVERROR(ENOMEM);
470 avio_read(pb, st->codec->extradata, st->codec->extradata_size);
473 /* Extract palette from extradata if bpp <= 8 */
474 /* This code assumes that extradata contains only palette */
475 /* This is true for all paletted codecs implemented in libavcodec */
476 if (st->codec->extradata_size && (st->codec->bits_per_coded_sample <= 8)) {
479 for (i = 0; i < FFMIN(st->codec->extradata_size, AVPALETTE_SIZE) / 4; i++)
480 asf_st->palette[i] = av_bswap32(((uint32_t *)st->codec->extradata)[i]);
482 memcpy(asf_st->palette, st->codec->extradata,
483 FFMIN(st->codec->extradata_size, AVPALETTE_SIZE));
485 asf_st->palette_changed = 1;
488 st->codec->codec_tag = tag1;
489 st->codec->codec_id = ff_codec_get_id(ff_codec_bmp_tags, tag1);
490 if (tag1 == MKTAG('D', 'V', 'R', ' ')) {
491 st->need_parsing = AVSTREAM_PARSE_FULL;
492 /* issue658 contains wrong w/h and MS even puts a fake seq header
493 * with wrong w/h in extradata while a correct one is in the stream.
494 * maximum lameness */
496 st->codec->height = 0;
497 av_freep(&st->codec->extradata);
498 st->codec->extradata_size = 0;
500 if (st->codec->codec_id == AV_CODEC_ID_H264)
501 st->need_parsing = AVSTREAM_PARSE_FULL_ONCE;
503 pos2 = avio_tell(pb);
504 avio_skip(pb, size - (pos2 - pos1 + 24));
509 static int asf_read_ext_stream_properties(AVFormatContext *s, int64_t size)
511 ASFContext *asf = s->priv_data;
512 AVIOContext *pb = s->pb;
514 int ext_len, payload_ext_ct, stream_ct, i;
515 uint32_t leak_rate, stream_num;
516 unsigned int stream_languageid_index;
518 avio_rl64(pb); // starttime
519 avio_rl64(pb); // endtime
520 leak_rate = avio_rl32(pb); // leak-datarate
521 avio_rl32(pb); // bucket-datasize
522 avio_rl32(pb); // init-bucket-fullness
523 avio_rl32(pb); // alt-leak-datarate
524 avio_rl32(pb); // alt-bucket-datasize
525 avio_rl32(pb); // alt-init-bucket-fullness
526 avio_rl32(pb); // max-object-size
527 avio_rl32(pb); // flags (reliable,seekable,no_cleanpoints?,resend-live-cleanpoints, rest of bits reserved)
528 stream_num = avio_rl16(pb); // stream-num
530 stream_languageid_index = avio_rl16(pb); // stream-language-id-index
531 if (stream_num < 128)
532 asf->streams[stream_num].stream_language_index = stream_languageid_index;
534 avio_rl64(pb); // avg frametime in 100ns units
535 stream_ct = avio_rl16(pb); // stream-name-count
536 payload_ext_ct = avio_rl16(pb); // payload-extension-system-count
538 if (stream_num < 128) {
539 asf->stream_bitrates[stream_num] = leak_rate;
540 asf->streams[stream_num].payload_ext_ct = 0;
543 for (i = 0; i < stream_ct; i++) {
545 ext_len = avio_rl16(pb);
546 avio_skip(pb, ext_len);
549 for (i = 0; i < payload_ext_ct; i++) {
552 size = avio_rl16(pb);
553 ext_len = avio_rl32(pb);
554 avio_skip(pb, ext_len);
555 if (stream_num < 128 && i < FF_ARRAY_ELEMS(asf->streams[stream_num].payload)) {
556 ASFPayload *p = &asf->streams[stream_num].payload[i];
559 av_log(s, AV_LOG_DEBUG, "Payload extension %x %d\n", g[0], p->size );
560 asf->streams[stream_num].payload_ext_ct ++;
567 static int asf_read_content_desc(AVFormatContext *s, int64_t size)
569 AVIOContext *pb = s->pb;
570 int len1, len2, len3, len4, len5;
572 len1 = avio_rl16(pb);
573 len2 = avio_rl16(pb);
574 len3 = avio_rl16(pb);
575 len4 = avio_rl16(pb);
576 len5 = avio_rl16(pb);
577 get_tag(s, "title", 0, len1, 32);
578 get_tag(s, "author", 0, len2, 32);
579 get_tag(s, "copyright", 0, len3, 32);
580 get_tag(s, "comment", 0, len4, 32);
586 static int asf_read_ext_content_desc(AVFormatContext *s, int64_t size)
588 AVIOContext *pb = s->pb;
589 ASFContext *asf = s->priv_data;
590 int desc_count, i, ret;
592 desc_count = avio_rl16(pb);
593 for (i = 0; i < desc_count; i++) {
594 int name_len, value_type, value_len;
597 name_len = avio_rl16(pb);
598 if (name_len % 2) // must be even, broken lavf versions wrote len-1
600 if ((ret = avio_get_str16le(pb, name_len, name, sizeof(name))) < name_len)
601 avio_skip(pb, name_len - ret);
602 value_type = avio_rl16(pb);
603 value_len = avio_rl16(pb);
604 if (!value_type && value_len % 2)
606 /* My sample has that stream set to 0 maybe that mean the container.
607 * ASF stream count starts at 1. I am using 0 to the container value
608 * since it's unused. */
609 if (!strcmp(name, "AspectRatioX"))
610 asf->dar[0].num = get_value(s->pb, value_type, 32);
611 else if (!strcmp(name, "AspectRatioY"))
612 asf->dar[0].den = get_value(s->pb, value_type, 32);
614 get_tag(s, name, value_type, value_len, 32);
620 static int asf_read_language_list(AVFormatContext *s, int64_t size)
622 AVIOContext *pb = s->pb;
623 ASFContext *asf = s->priv_data;
625 int stream_count = avio_rl16(pb);
626 for (j = 0; j < stream_count; j++) {
628 unsigned int lang_len = avio_r8(pb);
629 if ((ret = avio_get_str16le(pb, lang_len, lang,
630 sizeof(lang))) < lang_len)
631 avio_skip(pb, lang_len - ret);
633 av_strlcpy(asf->stream_languages[j], lang,
634 sizeof(*asf->stream_languages));
640 static int asf_read_metadata(AVFormatContext *s, int64_t size)
642 AVIOContext *pb = s->pb;
643 ASFContext *asf = s->priv_data;
644 int n, stream_num, name_len, value_len;
648 for (i = 0; i < n; i++) {
652 avio_rl16(pb); // lang_list_index
653 stream_num = avio_rl16(pb);
654 name_len = avio_rl16(pb);
655 value_type = avio_rl16(pb); /* value_type */
656 value_len = avio_rl32(pb);
658 if ((ret = avio_get_str16le(pb, name_len, name, sizeof(name))) < name_len)
659 avio_skip(pb, name_len - ret);
660 av_dlog(s, "%d stream %d name_len %2d type %d len %4d <%s>\n",
661 i, stream_num, name_len, value_type, value_len, name);
663 if (!strcmp(name, "AspectRatioX")){
664 int aspect_x = get_value(s->pb, value_type, 16);
666 asf->dar[stream_num].num = aspect_x;
667 } else if(!strcmp(name, "AspectRatioY")){
668 int aspect_y = get_value(s->pb, value_type, 16);
670 asf->dar[stream_num].den = aspect_y;
672 get_tag(s, name, value_type, value_len, 16);
679 static int asf_read_marker(AVFormatContext *s, int64_t size)
681 AVIOContext *pb = s->pb;
682 ASFContext *asf = s->priv_data;
683 int i, count, name_len, ret;
686 avio_rl64(pb); // reserved 16 bytes
687 avio_rl64(pb); // ...
688 count = avio_rl32(pb); // markers count
689 avio_rl16(pb); // reserved 2 bytes
690 name_len = avio_rl16(pb); // name length
691 for (i = 0; i < name_len; i++)
692 avio_r8(pb); // skip the name
694 for (i = 0; i < count; i++) {
698 avio_rl64(pb); // offset, 8 bytes
699 pres_time = avio_rl64(pb); // presentation time
700 pres_time -= asf->hdr.preroll * 10000;
701 avio_rl16(pb); // entry length
702 avio_rl32(pb); // send time
703 avio_rl32(pb); // flags
704 name_len = avio_rl32(pb); // name length
705 if ((ret = avio_get_str16le(pb, name_len * 2, name,
706 sizeof(name))) < name_len)
707 avio_skip(pb, name_len - ret);
708 avpriv_new_chapter(s, i, (AVRational) { 1, 10000000 }, pres_time,
709 AV_NOPTS_VALUE, name);
715 static int asf_read_header(AVFormatContext *s)
717 ASFContext *asf = s->priv_data;
719 AVIOContext *pb = s->pb;
724 if (ff_guidcmp(&g, &ff_asf_header))
725 return AVERROR_INVALIDDATA;
730 memset(&asf->asfid2avid, -1, sizeof(asf->asfid2avid));
732 for (i = 0; i<128; i++)
733 asf->streams[i].stream_language_index = 128; // invalid stream index means no language info
736 uint64_t gpos = avio_tell(pb);
738 gsize = avio_rl64(pb);
740 if (!ff_guidcmp(&g, &ff_asf_data_header)) {
741 asf->data_object_offset = avio_tell(pb);
742 /* If not streaming, gsize is not unlimited (how?),
743 * and there is enough space in the file.. */
744 if (!(asf->hdr.flags & 0x01) && gsize >= 100)
745 asf->data_object_size = gsize - 24;
747 asf->data_object_size = (uint64_t)-1;
751 return AVERROR_INVALIDDATA;
752 if (!ff_guidcmp(&g, &ff_asf_file_header)) {
753 int ret = asf_read_file_properties(s, gsize);
756 } else if (!ff_guidcmp(&g, &ff_asf_stream_header)) {
757 int ret = asf_read_stream_properties(s, gsize);
760 } else if (!ff_guidcmp(&g, &ff_asf_comment_header)) {
761 asf_read_content_desc(s, gsize);
762 } else if (!ff_guidcmp(&g, &ff_asf_language_guid)) {
763 asf_read_language_list(s, gsize);
764 } else if (!ff_guidcmp(&g, &ff_asf_extended_content_header)) {
765 asf_read_ext_content_desc(s, gsize);
766 } else if (!ff_guidcmp(&g, &ff_asf_metadata_header)) {
767 asf_read_metadata(s, gsize);
768 } else if (!ff_guidcmp(&g, &ff_asf_metadata_library_header)) {
769 asf_read_metadata(s, gsize);
770 } else if (!ff_guidcmp(&g, &ff_asf_ext_stream_header)) {
771 asf_read_ext_stream_properties(s, gsize);
773 // there could be a optional stream properties object to follow
774 // if so the next iteration will pick it up
776 } else if (!ff_guidcmp(&g, &ff_asf_head1_guid)) {
780 } else if (!ff_guidcmp(&g, &ff_asf_marker_header)) {
781 asf_read_marker(s, gsize);
782 } else if (url_feof(pb)) {
786 if (!ff_guidcmp(&g, &ff_asf_content_encryption)) {
789 av_log(s, AV_LOG_WARNING,
790 "DRM protected stream detected, decoding will likely fail!\n");
792 av_log(s, AV_LOG_DEBUG, "Secret data:\n");
793 av_get_packet(pb, &pkt, len); av_hex_dump_log(s, AV_LOG_DEBUG, pkt.data, pkt.size); av_free_packet(&pkt);
795 get_tag(s, "ASF_Protection_Type", -1, len, 32);
797 get_tag(s, "ASF_Key_ID", -1, len, 32);
799 get_tag(s, "ASF_License_URL", -1, len, 32);
800 } else if (!ff_guidcmp(&g, &ff_asf_ext_content_encryption)) {
801 av_log(s, AV_LOG_WARNING,
802 "Ext DRM protected stream detected, decoding will likely fail!\n");
803 av_dict_set(&s->metadata, "encryption", "ASF Extended Content Encryption", 0);
804 } else if (!ff_guidcmp(&g, &ff_asf_digital_signature)) {
805 av_log(s, AV_LOG_INFO, "Digital signature detected!\n");
809 if (avio_tell(pb) != gpos + gsize)
810 av_log(s, AV_LOG_DEBUG,
811 "gpos mismatch our pos=%"PRIu64", end=%"PRId64"\n",
812 avio_tell(pb) - gpos, gsize);
813 avio_seek(pb, gpos + gsize, SEEK_SET);
821 asf->data_offset = avio_tell(pb);
822 asf->packet_size_left = 0;
824 for (i = 0; i < 128; i++) {
825 int stream_num = asf->asfid2avid[i];
826 if (stream_num >= 0) {
827 AVStream *st = s->streams[stream_num];
828 if (!st->codec->bit_rate)
829 st->codec->bit_rate = asf->stream_bitrates[i];
830 if (asf->dar[i].num > 0 && asf->dar[i].den > 0) {
831 av_reduce(&st->sample_aspect_ratio.num,
832 &st->sample_aspect_ratio.den,
833 asf->dar[i].num, asf->dar[i].den, INT_MAX);
834 } else if ((asf->dar[0].num > 0) && (asf->dar[0].den > 0) &&
835 // Use ASF container value if the stream doesn't set AR.
836 (st->codec->codec_type == AVMEDIA_TYPE_VIDEO))
837 av_reduce(&st->sample_aspect_ratio.num,
838 &st->sample_aspect_ratio.den,
839 asf->dar[0].num, asf->dar[0].den, INT_MAX);
841 av_dlog(s, "i=%d, st->codec->codec_type:%d, asf->dar %d:%d sar=%d:%d\n",
842 i, st->codec->codec_type, asf->dar[i].num, asf->dar[i].den,
843 st->sample_aspect_ratio.num, st->sample_aspect_ratio.den);
845 // copy and convert language codes to the frontend
846 if (asf->streams[i].stream_language_index < 128) {
847 const char *rfc1766 = asf->stream_languages[asf->streams[i].stream_language_index];
848 if (rfc1766 && strlen(rfc1766) > 1) {
849 const char primary_tag[3] = { rfc1766[0], rfc1766[1], '\0' }; // ignore country code if any
850 const char *iso6392 = av_convert_lang_to(primary_tag,
851 AV_LANG_ISO639_2_BIBL);
853 av_dict_set(&st->metadata, "language", iso6392, 0);
859 ff_metadata_conv(&s->metadata, NULL, ff_asf_metadata_conv);
864 #define DO_2BITS(bits, var, defval) \
865 switch (bits & 3) { \
867 var = avio_rl32(pb); \
871 var = avio_rl16(pb); \
884 * Load a single ASF packet into the demuxer.
885 * @param s demux context
886 * @param pb context to read data from
887 * @return 0 on success, <0 on error
889 static int asf_get_packet(AVFormatContext *s, AVIOContext *pb)
891 ASFContext *asf = s->priv_data;
892 uint32_t packet_length, padsize;
896 // if we do not know packet size, allow skipping up to 32 kB
898 if (asf->no_resync_search)
900 else if (s->packet_size > 0)
901 off = (avio_tell(pb) - s->data_offset) % s->packet_size + 3;
908 if (c == 0x82 && !d && !e)
913 /* This code allows handling of -EAGAIN at packet boundaries (i.e.
914 * if the packet sync code above triggers -EAGAIN). This does not
915 * imply complete -EAGAIN handling support at random positions in
917 if (pb->error == AVERROR(EAGAIN))
918 return AVERROR(EAGAIN);
920 av_log(s, AV_LOG_ERROR,
921 "ff asf bad header %x at:%"PRId64"\n", c, avio_tell(pb));
923 if ((c & 0x8f) == 0x82) {
926 av_log(s, AV_LOG_ERROR, "ff asf bad non zero\n");
927 return AVERROR_INVALIDDATA;
932 } else if(!url_feof(pb)) {
933 avio_seek(pb, -1, SEEK_CUR); // FIXME
936 asf->packet_flags = c;
937 asf->packet_property = d;
939 DO_2BITS(asf->packet_flags >> 5, packet_length, s->packet_size);
940 DO_2BITS(asf->packet_flags >> 1, padsize, 0); // sequence ignored
941 DO_2BITS(asf->packet_flags >> 3, padsize, 0); // padding length
943 // the following checks prevent overflows and infinite loops
944 if (!packet_length || packet_length >= (1U << 29)) {
945 av_log(s, AV_LOG_ERROR,
946 "invalid packet_length %d at:%"PRId64"\n",
947 packet_length, avio_tell(pb));
948 return AVERROR_INVALIDDATA;
950 if (padsize >= packet_length) {
951 av_log(s, AV_LOG_ERROR,
952 "invalid padsize %d at:%"PRId64"\n", padsize, avio_tell(pb));
953 return AVERROR_INVALIDDATA;
956 asf->packet_timestamp = avio_rl32(pb);
957 avio_rl16(pb); /* duration */
958 // rsize has at least 11 bytes which have to be present
960 if (asf->packet_flags & 0x01) {
961 asf->packet_segsizetype = avio_r8(pb);
963 asf->packet_segments = asf->packet_segsizetype & 0x3f;
965 asf->packet_segments = 1;
966 asf->packet_segsizetype = 0x80;
968 if (rsize > packet_length - padsize) {
969 asf->packet_size_left = 0;
970 av_log(s, AV_LOG_ERROR,
971 "invalid packet header length %d for pktlen %d-%d at %"PRId64"\n",
972 rsize, packet_length, padsize, avio_tell(pb));
973 return AVERROR_INVALIDDATA;
975 asf->packet_size_left = packet_length - padsize - rsize;
976 if (packet_length < asf->hdr.min_pktsize)
977 padsize += asf->hdr.min_pktsize - packet_length;
978 asf->packet_padsize = padsize;
979 av_dlog(s, "packet: size=%d padsize=%d left=%d\n",
980 s->packet_size, asf->packet_padsize, asf->packet_size_left);
986 * @return <0 if error
988 static int asf_read_frame_header(AVFormatContext *s, AVIOContext *pb)
990 ASFContext *asf = s->priv_data;
993 int num = avio_r8(pb);
995 int64_t ts0, ts1 av_unused;
997 asf->packet_segments--;
998 asf->packet_key_frame = num >> 7;
999 asf->stream_index = asf->asfid2avid[num & 0x7f];
1000 asfst = &asf->streams[num & 0x7f];
1001 // sequence should be ignored!
1002 DO_2BITS(asf->packet_property >> 4, asf->packet_seq, 0);
1003 DO_2BITS(asf->packet_property >> 2, asf->packet_frag_offset, 0);
1004 DO_2BITS(asf->packet_property, asf->packet_replic_size, 0);
1005 av_dlog(asf, "key:%d stream:%d seq:%d offset:%d replic_size:%d\n",
1006 asf->packet_key_frame, asf->stream_index, asf->packet_seq,
1007 asf->packet_frag_offset, asf->packet_replic_size);
1008 if (rsize+(int64_t)asf->packet_replic_size > asf->packet_size_left) {
1009 av_log(s, AV_LOG_ERROR, "packet_replic_size %d is invalid\n", asf->packet_replic_size);
1010 return AVERROR_INVALIDDATA;
1012 if (asf->packet_replic_size >= 8) {
1013 int64_t end = avio_tell(pb) + asf->packet_replic_size;
1015 asfst->packet_obj_size = avio_rl32(pb);
1016 if (asfst->packet_obj_size >= (1 << 24) || asfst->packet_obj_size <= 0) {
1017 av_log(s, AV_LOG_ERROR, "packet_obj_size invalid\n");
1018 asfst->packet_obj_size = 0;
1019 return AVERROR_INVALIDDATA;
1021 asf->packet_frag_timestamp = avio_rl32(pb); // timestamp
1023 for (i = 0; i < asfst->payload_ext_ct; i++) {
1024 ASFPayload *p = &asfst->payload[i];
1028 size = avio_rl16(pb);
1029 payend = avio_tell(pb) + size;
1031 av_log(s, AV_LOG_ERROR, "too long payload\n");
1036 // duration = avio_rl16(pb);
1039 aspect.num = avio_r8(pb);
1040 aspect.den = avio_r8(pb);
1041 if (aspect.num > 0 && aspect.den > 0 && asf->stream_index >= 0) {
1042 s->streams[asf->stream_index]->sample_aspect_ratio = aspect;
1047 ts0 = avio_rl64(pb);
1048 ts1 = avio_rl64(pb);
1049 if (ts0!= -1) asf->packet_frag_timestamp = ts0/10000;
1050 else asf->packet_frag_timestamp = AV_NOPTS_VALUE;
1060 avio_seek(pb, payend, SEEK_SET);
1063 avio_seek(pb, end, SEEK_SET);
1064 rsize += asf->packet_replic_size; // FIXME - check validity
1065 } else if (asf->packet_replic_size == 1) {
1066 // multipacket - frag_offset is beginning timestamp
1067 asf->packet_time_start = asf->packet_frag_offset;
1068 asf->packet_frag_offset = 0;
1069 asf->packet_frag_timestamp = asf->packet_timestamp;
1071 asf->packet_time_delta = avio_r8(pb);
1073 } else if (asf->packet_replic_size != 0) {
1074 av_log(s, AV_LOG_ERROR, "unexpected packet_replic_size of %d\n",
1075 asf->packet_replic_size);
1076 return AVERROR_INVALIDDATA;
1078 if (asf->packet_flags & 0x01) {
1079 DO_2BITS(asf->packet_segsizetype >> 6, asf->packet_frag_size, 0); // 0 is illegal
1080 if (rsize > asf->packet_size_left) {
1081 av_log(s, AV_LOG_ERROR, "packet_replic_size is invalid\n");
1082 return AVERROR_INVALIDDATA;
1083 } else if (asf->packet_frag_size > asf->packet_size_left - rsize) {
1084 if (asf->packet_frag_size > asf->packet_size_left - rsize + asf->packet_padsize) {
1085 av_log(s, AV_LOG_ERROR, "packet_frag_size is invalid (%d-%d)\n",
1086 asf->packet_size_left, rsize);
1087 return AVERROR_INVALIDDATA;
1089 int diff = asf->packet_frag_size - (asf->packet_size_left - rsize);
1090 asf->packet_size_left += diff;
1091 asf->packet_padsize -= diff;
1095 asf->packet_frag_size = asf->packet_size_left - rsize;
1097 if (asf->packet_replic_size == 1) {
1098 asf->packet_multi_size = asf->packet_frag_size;
1099 if (asf->packet_multi_size > asf->packet_size_left)
1100 return AVERROR_INVALIDDATA;
1102 asf->packet_size_left -= rsize;
1108 * Parse data from individual ASF packets (which were previously loaded
1109 * with asf_get_packet()).
1110 * @param s demux context
1111 * @param pb context to read data from
1112 * @param pkt pointer to store packet data into
1113 * @return 0 if data was stored in pkt, <0 on error or 1 if more ASF
1114 * packets need to be loaded (through asf_get_packet())
1116 static int asf_parse_packet(AVFormatContext *s, AVIOContext *pb, AVPacket *pkt)
1118 ASFContext *asf = s->priv_data;
1119 ASFStream *asf_st = 0;
1125 if (asf->packet_size_left < FRAME_HEADER_SIZE ||
1126 asf->packet_segments < 1) {
1127 int ret = asf->packet_size_left + asf->packet_padsize;
1133 asf->packet_pos = avio_tell(pb);
1134 if (asf->data_object_size != (uint64_t)-1 &&
1135 (asf->packet_pos - asf->data_object_offset >= asf->data_object_size))
1136 return AVERROR_EOF; /* Do not exceed the size of the data object */
1139 if (asf->packet_time_start == 0) {
1140 if (asf_read_frame_header(s, pb) < 0) {
1141 asf->packet_segments = 0;
1144 if (asf->stream_index < 0 ||
1145 s->streams[asf->stream_index]->discard >= AVDISCARD_ALL ||
1146 (!asf->packet_key_frame &&
1147 (s->streams[asf->stream_index]->discard >= AVDISCARD_NONKEY || asf->streams[s->streams[asf->stream_index]->id].skip_to_key))) {
1148 asf->packet_time_start = 0;
1149 /* unhandled packet (should not happen) */
1150 avio_skip(pb, asf->packet_frag_size);
1151 asf->packet_size_left -= asf->packet_frag_size;
1152 if (asf->stream_index < 0)
1153 av_log(s, AV_LOG_ERROR, "ff asf skip %d (unknown stream)\n",
1154 asf->packet_frag_size);
1157 asf->asf_st = &asf->streams[s->streams[asf->stream_index]->id];
1158 asf->asf_st->skip_to_key = 0;
1160 asf_st = asf->asf_st;
1163 if (asf->packet_replic_size == 1) {
1164 // frag_offset is here used as the beginning timestamp
1165 asf->packet_frag_timestamp = asf->packet_time_start;
1166 asf->packet_time_start += asf->packet_time_delta;
1167 asf_st->packet_obj_size = asf->packet_frag_size = avio_r8(pb);
1168 asf->packet_size_left--;
1169 asf->packet_multi_size--;
1170 if (asf->packet_multi_size < asf_st->packet_obj_size) {
1171 asf->packet_time_start = 0;
1172 avio_skip(pb, asf->packet_multi_size);
1173 asf->packet_size_left -= asf->packet_multi_size;
1176 asf->packet_multi_size -= asf_st->packet_obj_size;
1179 if (asf_st->pkt.size != asf_st->packet_obj_size ||
1180 // FIXME is this condition sufficient?
1181 asf_st->frag_offset + asf->packet_frag_size > asf_st->pkt.size) {
1182 if (asf_st->pkt.data) {
1183 av_log(s, AV_LOG_INFO,
1184 "freeing incomplete packet size %d, new %d\n",
1185 asf_st->pkt.size, asf_st->packet_obj_size);
1186 asf_st->frag_offset = 0;
1187 av_free_packet(&asf_st->pkt);
1190 av_new_packet(&asf_st->pkt, asf_st->packet_obj_size);
1191 asf_st->seq = asf->packet_seq;
1192 asf_st->pkt.dts = asf->packet_frag_timestamp - asf->hdr.preroll;
1193 asf_st->pkt.stream_index = asf->stream_index;
1194 asf_st->pkt.pos = asf_st->packet_pos = asf->packet_pos;
1196 if (asf_st->pkt.data && asf_st->palette_changed) {
1198 pal = av_packet_new_side_data(&asf_st->pkt, AV_PKT_DATA_PALETTE,
1201 av_log(s, AV_LOG_ERROR, "Cannot append palette to packet\n");
1203 memcpy(pal, asf_st->palette, AVPALETTE_SIZE);
1204 asf_st->palette_changed = 0;
1207 av_dlog(asf, "new packet: stream:%d key:%d packet_key:%d audio:%d size:%d\n",
1208 asf->stream_index, asf->packet_key_frame,
1209 asf_st->pkt.flags & AV_PKT_FLAG_KEY,
1210 s->streams[asf->stream_index]->codec->codec_type == AVMEDIA_TYPE_AUDIO,
1211 asf_st->packet_obj_size);
1212 if (s->streams[asf->stream_index]->codec->codec_type == AVMEDIA_TYPE_AUDIO)
1213 asf->packet_key_frame = 1;
1214 if (asf->packet_key_frame)
1215 asf_st->pkt.flags |= AV_PKT_FLAG_KEY;
1219 av_dlog(asf, "READ PACKET s:%d os:%d o:%d,%d l:%d DATA:%p\n",
1220 s->packet_size, asf_st->pkt.size, asf->packet_frag_offset,
1221 asf_st->frag_offset, asf->packet_frag_size, asf_st->pkt.data);
1222 asf->packet_size_left -= asf->packet_frag_size;
1223 if (asf->packet_size_left < 0)
1226 if (asf->packet_frag_offset >= asf_st->pkt.size ||
1227 asf->packet_frag_size > asf_st->pkt.size - asf->packet_frag_offset) {
1228 av_log(s, AV_LOG_ERROR,
1229 "packet fragment position invalid %u,%u not in %u\n",
1230 asf->packet_frag_offset, asf->packet_frag_size,
1235 ret = avio_read(pb, asf_st->pkt.data + asf->packet_frag_offset,
1236 asf->packet_frag_size);
1237 if (ret != asf->packet_frag_size) {
1238 if (ret < 0 || asf->packet_frag_offset + ret == 0)
1239 return ret < 0 ? ret : AVERROR_EOF;
1241 if (asf_st->ds_span > 1) {
1242 // scrambling, we can either drop it completely or fill the remainder
1243 // TODO: should we fill the whole packet instead of just the current
1245 memset(asf_st->pkt.data + asf->packet_frag_offset + ret, 0,
1246 asf->packet_frag_size - ret);
1247 ret = asf->packet_frag_size;
1249 // no scrambling, so we can return partial packets
1250 av_shrink_packet(&asf_st->pkt, asf->packet_frag_offset + ret);
1253 if (s->key && s->keylen == 20)
1254 ff_asfcrypt_dec(s->key, asf_st->pkt.data + asf->packet_frag_offset,
1256 asf_st->frag_offset += ret;
1257 /* test if whole packet is read */
1258 if (asf_st->frag_offset == asf_st->pkt.size) {
1259 // workaround for macroshit radio DVR-MS files
1260 if (s->streams[asf->stream_index]->codec->codec_id == AV_CODEC_ID_MPEG2VIDEO &&
1261 asf_st->pkt.size > 100) {
1263 for (i = 0; i < asf_st->pkt.size && !asf_st->pkt.data[i]; i++)
1265 if (i == asf_st->pkt.size) {
1266 av_log(s, AV_LOG_DEBUG, "discarding ms fart\n");
1267 asf_st->frag_offset = 0;
1268 av_free_packet(&asf_st->pkt);
1274 if (asf_st->ds_span > 1) {
1275 if (asf_st->pkt.size != asf_st->ds_packet_size * asf_st->ds_span) {
1276 av_log(s, AV_LOG_ERROR,
1277 "pkt.size != ds_packet_size * ds_span (%d %d %d)\n",
1278 asf_st->pkt.size, asf_st->ds_packet_size,
1281 /* packet descrambling */
1282 AVBufferRef *buf = av_buffer_alloc(asf_st->pkt.size +
1283 FF_INPUT_BUFFER_PADDING_SIZE);
1285 uint8_t *newdata = buf->data;
1287 memset(newdata + asf_st->pkt.size, 0,
1288 FF_INPUT_BUFFER_PADDING_SIZE);
1289 while (offset < asf_st->pkt.size) {
1290 int off = offset / asf_st->ds_chunk_size;
1291 int row = off / asf_st->ds_span;
1292 int col = off % asf_st->ds_span;
1293 int idx = row + col * asf_st->ds_packet_size / asf_st->ds_chunk_size;
1294 assert(offset + asf_st->ds_chunk_size <= asf_st->pkt.size);
1295 assert(idx + 1 <= asf_st->pkt.size / asf_st->ds_chunk_size);
1296 memcpy(newdata + offset,
1297 asf_st->pkt.data + idx * asf_st->ds_chunk_size,
1298 asf_st->ds_chunk_size);
1299 offset += asf_st->ds_chunk_size;
1301 av_buffer_unref(&asf_st->pkt.buf);
1302 asf_st->pkt.buf = buf;
1303 asf_st->pkt.data = buf->data;
1307 asf_st->frag_offset = 0;
1309 #if FF_API_DESTRUCT_PACKET
1310 FF_DISABLE_DEPRECATION_WARNINGS
1311 asf_st->pkt.destruct = NULL;
1312 FF_ENABLE_DEPRECATION_WARNINGS
1314 asf_st->pkt.buf = 0;
1315 asf_st->pkt.size = 0;
1316 asf_st->pkt.data = 0;
1317 asf_st->pkt.side_data_elems = 0;
1318 asf_st->pkt.side_data = NULL;
1319 break; // packet completed
1325 static int asf_read_packet(AVFormatContext *s, AVPacket *pkt)
1327 ASFContext *asf = s->priv_data;
1332 /* parse cached packets, if any */
1333 if ((ret = asf_parse_packet(s, s->pb, pkt)) <= 0)
1335 if ((ret = asf_get_packet(s, s->pb)) < 0)
1336 assert(asf->packet_size_left < FRAME_HEADER_SIZE ||
1337 asf->packet_segments < 1);
1338 asf->packet_time_start = 0;
1342 // Added to support seeking after packets have been read
1343 // If information is not reset, read_packet fails due to
1344 // leftover information from previous reads
1345 static void asf_reset_header(AVFormatContext *s)
1347 ASFContext *asf = s->priv_data;
1351 asf->packet_size_left = 0;
1352 asf->packet_segments = 0;
1353 asf->packet_flags = 0;
1354 asf->packet_property = 0;
1355 asf->packet_timestamp = 0;
1356 asf->packet_segsizetype = 0;
1357 asf->packet_segments = 0;
1358 asf->packet_seq = 0;
1359 asf->packet_replic_size = 0;
1360 asf->packet_key_frame = 0;
1361 asf->packet_padsize = 0;
1362 asf->packet_frag_offset = 0;
1363 asf->packet_frag_size = 0;
1364 asf->packet_frag_timestamp = 0;
1365 asf->packet_multi_size = 0;
1366 asf->packet_time_delta = 0;
1367 asf->packet_time_start = 0;
1369 for (i = 0; i < 128; i++) {
1370 asf_st = &asf->streams[i];
1371 av_free_packet(&asf_st->pkt);
1372 asf_st->packet_obj_size = 0;
1373 asf_st->frag_offset = 0;
1379 static void skip_to_key(AVFormatContext *s)
1381 ASFContext *asf = s->priv_data;
1384 for (i = 0; i < 128; i++) {
1385 int j = asf->asfid2avid[i];
1386 ASFStream *asf_st = &asf->streams[i];
1387 if (j < 0 || s->streams[j]->codec->codec_type != AVMEDIA_TYPE_VIDEO)
1390 asf_st->skip_to_key = 1;
1394 static int asf_read_close(AVFormatContext *s)
1396 asf_reset_header(s);
1401 static int64_t asf_read_pts(AVFormatContext *s, int stream_index,
1402 int64_t *ppos, int64_t pos_limit)
1404 ASFContext *asf = s->priv_data;
1405 AVPacket pkt1, *pkt = &pkt1;
1408 int64_t pos = *ppos;
1410 int64_t start_pos[ASF_MAX_STREAMS];
1412 for (i = 0; i < s->nb_streams; i++)
1415 if (s->packet_size > 0)
1416 pos = (pos + s->packet_size - 1 - s->data_offset) /
1417 s->packet_size * s->packet_size +
1420 if (avio_seek(s->pb, pos, SEEK_SET) < 0)
1421 return AV_NOPTS_VALUE;
1423 ff_read_frame_flush(s);
1424 asf_reset_header(s);
1426 if (av_read_frame(s, pkt) < 0) {
1427 av_log(s, AV_LOG_INFO, "asf_read_pts failed\n");
1428 return AV_NOPTS_VALUE;
1433 av_free_packet(pkt);
1434 if (pkt->flags & AV_PKT_FLAG_KEY) {
1435 i = pkt->stream_index;
1437 asf_st = &asf->streams[s->streams[i]->id];
1439 // assert((asf_st->packet_pos - s->data_offset) % s->packet_size == 0);
1440 pos = asf_st->packet_pos;
1442 av_add_index_entry(s->streams[i], pos, pts, pkt->size,
1443 pos - start_pos[i] + 1, AVINDEX_KEYFRAME);
1444 start_pos[i] = asf_st->packet_pos + 1;
1446 if (pkt->stream_index == stream_index)
1455 static void asf_build_simple_index(AVFormatContext *s, int stream_index)
1458 ASFContext *asf = s->priv_data;
1459 int64_t current_pos = avio_tell(s->pb);
1461 if(avio_seek(s->pb, asf->data_object_offset + asf->data_object_size, SEEK_SET) < 0) {
1462 asf->index_read= -1;
1466 ff_get_guid(s->pb, &g);
1468 /* the data object can be followed by other top-level objects,
1469 * skip them until the simple index object is reached */
1470 while (ff_guidcmp(&g, &ff_asf_simple_index_header)) {
1471 int64_t gsize = avio_rl64(s->pb);
1472 if (gsize < 24 || url_feof(s->pb)) {
1473 avio_seek(s->pb, current_pos, SEEK_SET);
1474 asf->index_read= -1;
1477 avio_skip(s->pb, gsize - 24);
1478 ff_get_guid(s->pb, &g);
1482 int64_t itime, last_pos = -1;
1485 int64_t av_unused gsize = avio_rl64(s->pb);
1486 ff_get_guid(s->pb, &g);
1487 itime = avio_rl64(s->pb);
1488 pct = avio_rl32(s->pb);
1489 ict = avio_rl32(s->pb);
1490 av_log(s, AV_LOG_DEBUG,
1491 "itime:0x%"PRIx64", pct:%d, ict:%d\n", itime, pct, ict);
1493 for (i = 0; i < ict; i++) {
1494 int pktnum = avio_rl32(s->pb);
1495 int pktct = avio_rl16(s->pb);
1496 int64_t pos = s->data_offset + s->packet_size * (int64_t)pktnum;
1497 int64_t index_pts = FFMAX(av_rescale(itime, i, 10000) - asf->hdr.preroll, 0);
1499 if (pos != last_pos) {
1500 av_log(s, AV_LOG_DEBUG, "pktnum:%d, pktct:%d pts: %"PRId64"\n",
1501 pktnum, pktct, index_pts);
1502 av_add_index_entry(s->streams[stream_index], pos, index_pts,
1503 s->packet_size, 0, AVINDEX_KEYFRAME);
1507 asf->index_read = ict > 1;
1509 avio_seek(s->pb, current_pos, SEEK_SET);
1512 static int asf_read_seek(AVFormatContext *s, int stream_index,
1513 int64_t pts, int flags)
1515 ASFContext *asf = s->priv_data;
1516 AVStream *st = s->streams[stream_index];
1518 if (s->packet_size <= 0)
1521 /* Try using the protocol's read_seek if available */
1523 int ret = avio_seek_time(s->pb, stream_index, pts, flags);
1525 asf_reset_header(s);
1526 if (ret != AVERROR(ENOSYS))
1530 if (!asf->index_read)
1531 asf_build_simple_index(s, stream_index);
1533 if ((asf->index_read > 0 && st->index_entries)) {
1534 int index = av_index_search_timestamp(st, pts, flags);
1536 /* find the position */
1537 uint64_t pos = st->index_entries[index].pos;
1540 av_log(s, AV_LOG_DEBUG, "SEEKTO: %"PRId64"\n", pos);
1541 if(avio_seek(s->pb, pos, SEEK_SET) < 0)
1543 asf_reset_header(s);
1548 /* no index or seeking by index failed */
1549 if (ff_seek_frame_binary(s, stream_index, pts, flags) < 0)
1551 asf_reset_header(s);
1556 AVInputFormat ff_asf_demuxer = {
1558 .long_name = NULL_IF_CONFIG_SMALL("ASF (Advanced / Active Streaming Format)"),
1559 .priv_data_size = sizeof(ASFContext),
1560 .read_probe = asf_probe,
1561 .read_header = asf_read_header,
1562 .read_packet = asf_read_packet,
1563 .read_close = asf_read_close,
1564 .read_seek = asf_read_seek,
1565 .read_timestamp = asf_read_pts,
1566 .flags = AVFMT_NOBINSEARCH | AVFMT_NOGENSEARCH,
1567 .priv_class = &asf_class,