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 ASFContext {
44 int asfid2avid[128]; ///< conversion table from asf ID 2 AVStream ID
45 ASFStream streams[128]; ///< it's max number and it's not that big
46 uint32_t stream_bitrates[128]; ///< max number of streams, bitrate for each (for streaming)
48 char stream_languages[128][6]; ///< max number of streams, language for each (RFC1766, e.g. en-US)
49 /* non streamed additonnal info */
52 /* only for reading */
53 uint64_t data_offset; ///< beginning of the first data packet
54 uint64_t data_object_offset; ///< data object offset (excl. GUID & size)
55 uint64_t data_object_size; ///< size of the data object
63 int packet_segsizetype;
66 int packet_replic_size;
69 unsigned int packet_frag_offset;
70 unsigned int packet_frag_size;
71 int64_t packet_frag_timestamp;
73 int packet_multi_size;
74 int packet_time_delta;
75 int packet_time_start;
80 ASFStream *asf_st; ///< currently decoded stream
86 static const AVOption options[] = {
87 { "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 },
88 { "export_xmp", "Export full XMP metadata", offsetof(ASFContext, export_xmp), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, AV_OPT_FLAG_DECODING_PARAM },
92 static const AVClass asf_class = {
93 .class_name = "asf demuxer",
94 .item_name = av_default_item_name,
96 .version = LIBAVUTIL_VERSION_INT,
102 #define ASF_MAX_STREAMS 127
103 #define FRAME_HEADER_SIZE 16
104 // Fix Me! FRAME_HEADER_SIZE may be different. (17 is known to be too large)
107 static const ff_asf_guid stream_bitrate_guid = { /* (http://get.to/sdp) */
108 0xce, 0x75, 0xf8, 0x7b, 0x8d, 0x46, 0xd1, 0x11, 0x8d, 0x82, 0x00, 0x60, 0x97, 0xc9, 0xa2, 0xb2
111 #define PRINT_IF_GUID(g, cmp) \
112 if (!ff_guidcmp(g, &cmp)) \
113 av_log(NULL, AV_LOG_TRACE, "(GUID: %s) ", # cmp)
115 static void print_guid(ff_asf_guid *g)
118 PRINT_IF_GUID(g, ff_asf_header);
119 else PRINT_IF_GUID(g, ff_asf_file_header);
120 else PRINT_IF_GUID(g, ff_asf_stream_header);
121 else PRINT_IF_GUID(g, ff_asf_audio_stream);
122 else PRINT_IF_GUID(g, ff_asf_audio_conceal_none);
123 else PRINT_IF_GUID(g, ff_asf_video_stream);
124 else PRINT_IF_GUID(g, ff_asf_video_conceal_none);
125 else PRINT_IF_GUID(g, ff_asf_command_stream);
126 else PRINT_IF_GUID(g, ff_asf_comment_header);
127 else PRINT_IF_GUID(g, ff_asf_codec_comment_header);
128 else PRINT_IF_GUID(g, ff_asf_codec_comment1_header);
129 else PRINT_IF_GUID(g, ff_asf_data_header);
130 else PRINT_IF_GUID(g, ff_asf_simple_index_header);
131 else PRINT_IF_GUID(g, ff_asf_head1_guid);
132 else PRINT_IF_GUID(g, ff_asf_head2_guid);
133 else PRINT_IF_GUID(g, ff_asf_my_guid);
134 else PRINT_IF_GUID(g, ff_asf_ext_stream_header);
135 else PRINT_IF_GUID(g, ff_asf_extended_content_header);
136 else PRINT_IF_GUID(g, ff_asf_ext_stream_embed_stream_header);
137 else PRINT_IF_GUID(g, ff_asf_ext_stream_audio_stream);
138 else PRINT_IF_GUID(g, ff_asf_metadata_header);
139 else PRINT_IF_GUID(g, ff_asf_metadata_library_header);
140 else PRINT_IF_GUID(g, ff_asf_marker_header);
141 else PRINT_IF_GUID(g, stream_bitrate_guid);
142 else PRINT_IF_GUID(g, ff_asf_language_guid);
144 av_log(NULL, AV_LOG_TRACE, "(GUID: unknown) ");
145 for (i = 0; i < 16; i++)
146 av_log(NULL, AV_LOG_TRACE, " 0x%02x,", (*g)[i]);
147 av_log(NULL, AV_LOG_TRACE, "}\n");
151 #define print_guid(g)
154 static int asf_probe(AVProbeData *pd)
156 /* check file header */
157 if (!ff_guidcmp(pd->buf, &ff_asf_header))
158 return AVPROBE_SCORE_MAX;
163 /* size of type 2 (BOOL) is 32bit for "Extended Content Description Object"
164 * but 16 bit for "Metadata Object" and "Metadata Library Object" */
165 static int get_value(AVIOContext *pb, int type, int type2_size)
169 return (type2_size == 32) ? avio_rl32(pb) : avio_rl16(pb);
171 return avio_rl32(pb);
173 return avio_rl64(pb);
175 return avio_rl16(pb);
181 /* MSDN claims that this should be "compatible with the ID3 frame, APIC",
182 * but in reality this is only loosely similar */
183 static int asf_read_picture(AVFormatContext *s, int len)
185 AVPacket pkt = { 0 };
186 const CodecMime *mime = ff_id3v2_mime_tags;
187 enum AVCodecID id = AV_CODEC_ID_NONE;
189 uint8_t *desc = NULL;
191 int ret, type, picsize, desc_len;
193 /* type + picsize + mime + desc */
194 if (len < 1 + 4 + 2 + 2) {
195 av_log(s, AV_LOG_ERROR, "Invalid attached picture size: %d.\n", len);
196 return AVERROR_INVALIDDATA;
200 type = avio_r8(s->pb);
202 if (type >= FF_ARRAY_ELEMS(ff_id3v2_picture_types) || type < 0) {
203 av_log(s, AV_LOG_WARNING, "Unknown attached picture type: %d.\n", type);
207 /* picture data size */
208 picsize = avio_rl32(s->pb);
211 /* picture MIME type */
212 len -= avio_get_str16le(s->pb, len, mimetype, sizeof(mimetype));
213 while (mime->id != AV_CODEC_ID_NONE) {
214 if (!strncmp(mime->str, mimetype, sizeof(mimetype))) {
220 if (id == AV_CODEC_ID_NONE) {
221 av_log(s, AV_LOG_ERROR, "Unknown attached picture mimetype: %s.\n",
226 if (picsize >= len) {
227 av_log(s, AV_LOG_ERROR, "Invalid attached picture data size: %d >= %d.\n",
229 return AVERROR_INVALIDDATA;
232 /* picture description */
233 desc_len = (len - picsize) * 2 + 1;
234 desc = av_malloc(desc_len);
236 return AVERROR(ENOMEM);
237 len -= avio_get_str16le(s->pb, len - picsize, desc, desc_len);
239 ret = av_get_packet(s->pb, &pkt, picsize);
243 st = avformat_new_stream(s, NULL);
245 ret = AVERROR(ENOMEM);
248 st->disposition |= AV_DISPOSITION_ATTACHED_PIC;
249 st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
250 st->codec->codec_id = id;
251 st->attached_pic = pkt;
252 st->attached_pic.stream_index = st->index;
253 st->attached_pic.flags |= AV_PKT_FLAG_KEY;
256 av_dict_set(&st->metadata, "title", desc, AV_DICT_DONT_STRDUP_VAL);
260 av_dict_set(&st->metadata, "comment", ff_id3v2_picture_types[type], 0);
266 av_free_packet(&pkt);
270 static void get_id3_tag(AVFormatContext *s, int len)
272 ID3v2ExtraMeta *id3v2_extra_meta = NULL;
274 ff_id3v2_read(s, ID3v2_DEFAULT_MAGIC, &id3v2_extra_meta, len);
275 if (id3v2_extra_meta)
276 ff_id3v2_parse_apic(s, &id3v2_extra_meta);
277 ff_id3v2_free_extra_meta(&id3v2_extra_meta);
280 static void get_tag(AVFormatContext *s, const char *key, int type, int len, int type2_size)
282 ASFContext *asf = s->priv_data;
284 int64_t off = avio_tell(s->pb);
287 if ((unsigned)len >= (UINT_MAX - LEN) / 2)
290 if (!asf->export_xmp && !strncmp(key, "xmp", 3))
293 value = av_malloc(2 * len + LEN);
297 if (type == 0) { // UTF16-LE
298 avio_get_str16le(s->pb, len, value, 2 * len + 1);
299 } else if (type == -1) { // ASCII
300 avio_read(s->pb, value, len);
302 } else if (type == 1) { // byte array
303 if (!strcmp(key, "WM/Picture")) { // handle cover art
304 asf_read_picture(s, len);
305 } else if (!strcmp(key, "ID3")) { // handle ID3 tag
308 av_log(s, AV_LOG_VERBOSE, "Unsupported byte array in tag %s.\n", key);
311 } else if (type > 1 && type <= 5) { // boolean or DWORD or QWORD or WORD
312 uint64_t num = get_value(s->pb, type, type2_size);
313 snprintf(value, LEN, "%"PRIu64, num);
314 } else if (type == 6) { // (don't) handle GUID
315 av_log(s, AV_LOG_DEBUG, "Unsupported GUID value in tag %s.\n", key);
318 av_log(s, AV_LOG_DEBUG,
319 "Unsupported value type %d in tag %s.\n", type, key);
323 av_dict_set(&s->metadata, key, value, 0);
327 avio_seek(s->pb, off + len, SEEK_SET);
330 static int asf_read_file_properties(AVFormatContext *s, int64_t size)
332 ASFContext *asf = s->priv_data;
333 AVIOContext *pb = s->pb;
335 ff_get_guid(pb, &asf->hdr.guid);
336 asf->hdr.file_size = avio_rl64(pb);
337 asf->hdr.create_time = avio_rl64(pb);
338 avio_rl64(pb); /* number of packets */
339 asf->hdr.play_time = avio_rl64(pb);
340 asf->hdr.send_time = avio_rl64(pb);
341 asf->hdr.preroll = avio_rl32(pb);
342 asf->hdr.ignore = avio_rl32(pb);
343 asf->hdr.flags = avio_rl32(pb);
344 asf->hdr.min_pktsize = avio_rl32(pb);
345 asf->hdr.max_pktsize = avio_rl32(pb);
346 if (asf->hdr.min_pktsize >= (1U << 29))
347 return AVERROR_INVALIDDATA;
348 asf->hdr.max_bitrate = avio_rl32(pb);
349 s->packet_size = asf->hdr.max_pktsize;
354 static int asf_read_stream_properties(AVFormatContext *s, int64_t size)
356 ASFContext *asf = s->priv_data;
357 AVIOContext *pb = s->pb;
361 enum AVMediaType type;
362 int type_specific_size, sizeX;
364 int64_t pos1, pos2, start_time;
365 int test_for_ext_stream_audio, is_dvr_ms_audio = 0;
367 if (s->nb_streams == ASF_MAX_STREAMS) {
368 av_log(s, AV_LOG_ERROR, "too many streams\n");
369 return AVERROR(EINVAL);
372 pos1 = avio_tell(pb);
374 st = avformat_new_stream(s, NULL);
376 return AVERROR(ENOMEM);
377 avpriv_set_pts_info(st, 32, 1, 1000); /* 32 bit pts in ms */
378 start_time = asf->hdr.preroll;
380 if (!(asf->hdr.flags & 0x01)) { // if we aren't streaming...
381 int64_t fsize = avio_size(pb);
382 if (fsize <= 0 || (int64_t)asf->hdr.file_size <= 0 ||
383 FFABS(fsize - (int64_t)asf->hdr.file_size) / (float)FFMIN(fsize, asf->hdr.file_size) < 0.05)
384 st->duration = asf->hdr.play_time /
385 (10000000 / 1000) - start_time;
389 test_for_ext_stream_audio = 0;
390 if (!ff_guidcmp(&g, &ff_asf_audio_stream)) {
391 type = AVMEDIA_TYPE_AUDIO;
392 } else if (!ff_guidcmp(&g, &ff_asf_video_stream)) {
393 type = AVMEDIA_TYPE_VIDEO;
394 } else if (!ff_guidcmp(&g, &ff_asf_jfif_media)) {
395 type = AVMEDIA_TYPE_VIDEO;
396 st->codec->codec_id = AV_CODEC_ID_MJPEG;
397 } else if (!ff_guidcmp(&g, &ff_asf_command_stream)) {
398 type = AVMEDIA_TYPE_DATA;
399 } else if (!ff_guidcmp(&g, &ff_asf_ext_stream_embed_stream_header)) {
400 test_for_ext_stream_audio = 1;
401 type = AVMEDIA_TYPE_UNKNOWN;
406 avio_skip(pb, 8); /* total_size */
407 type_specific_size = avio_rl32(pb);
409 st->id = avio_rl16(pb) & 0x7f; /* stream id */
410 // mapping of asf ID to AV stream ID;
411 asf->asfid2avid[st->id] = s->nb_streams - 1;
412 asf_st = &asf->streams[st->id];
416 if (test_for_ext_stream_audio) {
418 if (!ff_guidcmp(&g, &ff_asf_ext_stream_audio_stream)) {
419 type = AVMEDIA_TYPE_AUDIO;
430 st->codec->codec_type = type;
431 if (type == AVMEDIA_TYPE_AUDIO) {
432 int ret = ff_get_wav_header(pb, st->codec, type_specific_size, 0);
435 if (is_dvr_ms_audio) {
436 // codec_id and codec_tag are unreliable in dvr_ms
437 // files. Set them later by probing stream.
438 st->request_probe = 1;
439 st->codec->codec_tag = 0;
441 if (st->codec->codec_id == AV_CODEC_ID_AAC)
442 st->need_parsing = AVSTREAM_PARSE_NONE;
444 st->need_parsing = AVSTREAM_PARSE_FULL;
445 /* We have to init the frame size at some point .... */
446 pos2 = avio_tell(pb);
447 if (size >= (pos2 + 8 - pos1 + 24)) {
448 asf_st->ds_span = avio_r8(pb);
449 asf_st->ds_packet_size = avio_rl16(pb);
450 asf_st->ds_chunk_size = avio_rl16(pb);
451 avio_rl16(pb); // ds_data_size
452 avio_r8(pb); // ds_silence_data
454 if (asf_st->ds_span > 1) {
455 if (!asf_st->ds_chunk_size ||
456 (asf_st->ds_packet_size / asf_st->ds_chunk_size <= 1) ||
457 asf_st->ds_packet_size % asf_st->ds_chunk_size)
458 asf_st->ds_span = 0; // disable descrambling
460 } else if (type == AVMEDIA_TYPE_VIDEO &&
461 size - (avio_tell(pb) - pos1 + 24) >= 51) {
465 avio_rl16(pb); /* size */
466 sizeX = avio_rl32(pb); /* size */
467 st->codec->width = avio_rl32(pb);
468 st->codec->height = avio_rl32(pb);
469 /* not available for asf */
470 avio_rl16(pb); /* panes */
471 st->codec->bits_per_coded_sample = avio_rl16(pb); /* depth */
472 tag1 = avio_rl32(pb);
475 st->codec->extradata_size = ffio_limit(pb, sizeX - 40);
476 st->codec->extradata = av_mallocz(st->codec->extradata_size +
477 FF_INPUT_BUFFER_PADDING_SIZE);
478 if (!st->codec->extradata)
479 return AVERROR(ENOMEM);
480 avio_read(pb, st->codec->extradata, st->codec->extradata_size);
483 /* Extract palette from extradata if bpp <= 8 */
484 /* This code assumes that extradata contains only palette */
485 /* This is true for all paletted codecs implemented in libavcodec */
486 if (st->codec->extradata_size && (st->codec->bits_per_coded_sample <= 8)) {
489 for (i = 0; i < FFMIN(st->codec->extradata_size, AVPALETTE_SIZE) / 4; i++)
490 asf_st->palette[i] = av_bswap32(((uint32_t *)st->codec->extradata)[i]);
492 memcpy(asf_st->palette, st->codec->extradata,
493 FFMIN(st->codec->extradata_size, AVPALETTE_SIZE));
495 asf_st->palette_changed = 1;
498 st->codec->codec_tag = tag1;
499 st->codec->codec_id = ff_codec_get_id(ff_codec_bmp_tags, tag1);
500 if (tag1 == MKTAG('D', 'V', 'R', ' ')) {
501 st->need_parsing = AVSTREAM_PARSE_FULL;
502 /* issue658 contains wrong w/h and MS even puts a fake seq header
503 * with wrong w/h in extradata while a correct one is in the stream.
504 * maximum lameness */
506 st->codec->height = 0;
507 av_freep(&st->codec->extradata);
508 st->codec->extradata_size = 0;
510 if (st->codec->codec_id == AV_CODEC_ID_H264)
511 st->need_parsing = AVSTREAM_PARSE_FULL_ONCE;
512 if (st->codec->codec_id == AV_CODEC_ID_MPEG4)
513 st->need_parsing = AVSTREAM_PARSE_FULL_ONCE;
515 pos2 = avio_tell(pb);
516 avio_skip(pb, size - (pos2 - pos1 + 24));
521 static int asf_read_ext_stream_properties(AVFormatContext *s, int64_t size)
523 ASFContext *asf = s->priv_data;
524 AVIOContext *pb = s->pb;
526 int ext_len, payload_ext_ct, stream_ct, i;
527 uint32_t leak_rate, stream_num;
528 unsigned int stream_languageid_index;
530 avio_rl64(pb); // starttime
531 avio_rl64(pb); // endtime
532 leak_rate = avio_rl32(pb); // leak-datarate
533 avio_rl32(pb); // bucket-datasize
534 avio_rl32(pb); // init-bucket-fullness
535 avio_rl32(pb); // alt-leak-datarate
536 avio_rl32(pb); // alt-bucket-datasize
537 avio_rl32(pb); // alt-init-bucket-fullness
538 avio_rl32(pb); // max-object-size
539 avio_rl32(pb); // flags (reliable,seekable,no_cleanpoints?,resend-live-cleanpoints, rest of bits reserved)
540 stream_num = avio_rl16(pb); // stream-num
542 stream_languageid_index = avio_rl16(pb); // stream-language-id-index
543 if (stream_num < 128)
544 asf->streams[stream_num].stream_language_index = stream_languageid_index;
546 avio_rl64(pb); // avg frametime in 100ns units
547 stream_ct = avio_rl16(pb); // stream-name-count
548 payload_ext_ct = avio_rl16(pb); // payload-extension-system-count
550 if (stream_num < 128) {
551 asf->stream_bitrates[stream_num] = leak_rate;
552 asf->streams[stream_num].payload_ext_ct = 0;
555 for (i = 0; i < stream_ct; i++) {
557 ext_len = avio_rl16(pb);
558 avio_skip(pb, ext_len);
561 for (i = 0; i < payload_ext_ct; i++) {
564 size = avio_rl16(pb);
565 ext_len = avio_rl32(pb);
566 avio_skip(pb, ext_len);
567 if (stream_num < 128 && i < FF_ARRAY_ELEMS(asf->streams[stream_num].payload)) {
568 ASFPayload *p = &asf->streams[stream_num].payload[i];
571 av_log(s, AV_LOG_DEBUG, "Payload extension %x %d\n", g[0], p->size );
572 asf->streams[stream_num].payload_ext_ct ++;
579 static int asf_read_content_desc(AVFormatContext *s, int64_t size)
581 AVIOContext *pb = s->pb;
582 int len1, len2, len3, len4, len5;
584 len1 = avio_rl16(pb);
585 len2 = avio_rl16(pb);
586 len3 = avio_rl16(pb);
587 len4 = avio_rl16(pb);
588 len5 = avio_rl16(pb);
589 get_tag(s, "title", 0, len1, 32);
590 get_tag(s, "author", 0, len2, 32);
591 get_tag(s, "copyright", 0, len3, 32);
592 get_tag(s, "comment", 0, len4, 32);
598 static int asf_read_ext_content_desc(AVFormatContext *s, int64_t size)
600 AVIOContext *pb = s->pb;
601 ASFContext *asf = s->priv_data;
602 int desc_count, i, ret;
604 desc_count = avio_rl16(pb);
605 for (i = 0; i < desc_count; i++) {
606 int name_len, value_type, value_len;
609 name_len = avio_rl16(pb);
610 if (name_len % 2) // must be even, broken lavf versions wrote len-1
612 if ((ret = avio_get_str16le(pb, name_len, name, sizeof(name))) < name_len)
613 avio_skip(pb, name_len - ret);
614 value_type = avio_rl16(pb);
615 value_len = avio_rl16(pb);
616 if (!value_type && value_len % 2)
618 /* My sample has that stream set to 0 maybe that mean the container.
619 * ASF stream count starts at 1. I am using 0 to the container value
620 * since it's unused. */
621 if (!strcmp(name, "AspectRatioX"))
622 asf->dar[0].num = get_value(s->pb, value_type, 32);
623 else if (!strcmp(name, "AspectRatioY"))
624 asf->dar[0].den = get_value(s->pb, value_type, 32);
626 get_tag(s, name, value_type, value_len, 32);
632 static int asf_read_language_list(AVFormatContext *s, int64_t size)
634 AVIOContext *pb = s->pb;
635 ASFContext *asf = s->priv_data;
637 int stream_count = avio_rl16(pb);
638 for (j = 0; j < stream_count; j++) {
640 unsigned int lang_len = avio_r8(pb);
641 if ((ret = avio_get_str16le(pb, lang_len, lang,
642 sizeof(lang))) < lang_len)
643 avio_skip(pb, lang_len - ret);
645 av_strlcpy(asf->stream_languages[j], lang,
646 sizeof(*asf->stream_languages));
652 static int asf_read_metadata(AVFormatContext *s, int64_t size)
654 AVIOContext *pb = s->pb;
655 ASFContext *asf = s->priv_data;
656 int n, stream_num, name_len, value_len;
660 for (i = 0; i < n; i++) {
664 avio_rl16(pb); // lang_list_index
665 stream_num = avio_rl16(pb);
666 name_len = avio_rl16(pb);
667 value_type = avio_rl16(pb); /* value_type */
668 value_len = avio_rl32(pb);
670 if ((ret = avio_get_str16le(pb, name_len, name, sizeof(name))) < name_len)
671 avio_skip(pb, name_len - ret);
672 av_log(s, AV_LOG_TRACE, "%d stream %d name_len %2d type %d len %4d <%s>\n",
673 i, stream_num, name_len, value_type, value_len, name);
675 if (!strcmp(name, "AspectRatioX")){
676 int aspect_x = get_value(s->pb, value_type, 16);
678 asf->dar[stream_num].num = aspect_x;
679 } else if(!strcmp(name, "AspectRatioY")){
680 int aspect_y = get_value(s->pb, value_type, 16);
682 asf->dar[stream_num].den = aspect_y;
684 get_tag(s, name, value_type, value_len, 16);
691 static int asf_read_marker(AVFormatContext *s, int64_t size)
693 AVIOContext *pb = s->pb;
694 ASFContext *asf = s->priv_data;
695 int i, count, name_len, ret;
698 avio_rl64(pb); // reserved 16 bytes
699 avio_rl64(pb); // ...
700 count = avio_rl32(pb); // markers count
701 avio_rl16(pb); // reserved 2 bytes
702 name_len = avio_rl16(pb); // name length
703 for (i = 0; i < name_len; i++)
704 avio_r8(pb); // skip the name
706 for (i = 0; i < count; i++) {
710 avio_rl64(pb); // offset, 8 bytes
711 pres_time = avio_rl64(pb); // presentation time
712 pres_time -= asf->hdr.preroll * 10000;
713 avio_rl16(pb); // entry length
714 avio_rl32(pb); // send time
715 avio_rl32(pb); // flags
716 name_len = avio_rl32(pb); // name length
717 if ((ret = avio_get_str16le(pb, name_len * 2, name,
718 sizeof(name))) < name_len)
719 avio_skip(pb, name_len - ret);
720 avpriv_new_chapter(s, i, (AVRational) { 1, 10000000 }, pres_time,
721 AV_NOPTS_VALUE, name);
727 static int asf_read_header(AVFormatContext *s)
729 ASFContext *asf = s->priv_data;
731 AVIOContext *pb = s->pb;
736 if (ff_guidcmp(&g, &ff_asf_header))
737 return AVERROR_INVALIDDATA;
742 memset(&asf->asfid2avid, -1, sizeof(asf->asfid2avid));
744 for (i = 0; i<128; i++)
745 asf->streams[i].stream_language_index = 128; // invalid stream index means no language info
748 uint64_t gpos = avio_tell(pb);
750 gsize = avio_rl64(pb);
752 if (!ff_guidcmp(&g, &ff_asf_data_header)) {
753 asf->data_object_offset = avio_tell(pb);
754 /* If not streaming, gsize is not unlimited (how?),
755 * and there is enough space in the file.. */
756 if (!(asf->hdr.flags & 0x01) && gsize >= 100)
757 asf->data_object_size = gsize - 24;
759 asf->data_object_size = (uint64_t)-1;
763 return AVERROR_INVALIDDATA;
764 if (!ff_guidcmp(&g, &ff_asf_file_header)) {
765 int ret = asf_read_file_properties(s, gsize);
768 } else if (!ff_guidcmp(&g, &ff_asf_stream_header)) {
769 int ret = asf_read_stream_properties(s, gsize);
772 } else if (!ff_guidcmp(&g, &ff_asf_comment_header)) {
773 asf_read_content_desc(s, gsize);
774 } else if (!ff_guidcmp(&g, &ff_asf_language_guid)) {
775 asf_read_language_list(s, gsize);
776 } else if (!ff_guidcmp(&g, &ff_asf_extended_content_header)) {
777 asf_read_ext_content_desc(s, gsize);
778 } else if (!ff_guidcmp(&g, &ff_asf_metadata_header)) {
779 asf_read_metadata(s, gsize);
780 } else if (!ff_guidcmp(&g, &ff_asf_metadata_library_header)) {
781 asf_read_metadata(s, gsize);
782 } else if (!ff_guidcmp(&g, &ff_asf_ext_stream_header)) {
783 asf_read_ext_stream_properties(s, gsize);
785 // there could be a optional stream properties object to follow
786 // if so the next iteration will pick it up
788 } else if (!ff_guidcmp(&g, &ff_asf_head1_guid)) {
792 } else if (!ff_guidcmp(&g, &ff_asf_marker_header)) {
793 asf_read_marker(s, gsize);
794 } else if (avio_feof(pb)) {
798 if (!ff_guidcmp(&g, &ff_asf_content_encryption)) {
802 av_log(s, AV_LOG_WARNING,
803 "DRM protected stream detected, decoding will likely fail!\n");
805 av_log(s, AV_LOG_DEBUG, "Secret data:\n");
807 if ((ret = av_get_packet(pb, &pkt, len)) < 0)
809 av_hex_dump_log(s, AV_LOG_DEBUG, pkt.data, pkt.size);
810 av_free_packet(&pkt);
812 get_tag(s, "ASF_Protection_Type", -1, len, 32);
814 get_tag(s, "ASF_Key_ID", -1, len, 32);
816 get_tag(s, "ASF_License_URL", -1, len, 32);
817 } else if (!ff_guidcmp(&g, &ff_asf_ext_content_encryption)) {
818 av_log(s, AV_LOG_WARNING,
819 "Ext DRM protected stream detected, decoding will likely fail!\n");
820 av_dict_set(&s->metadata, "encryption", "ASF Extended Content Encryption", 0);
821 } else if (!ff_guidcmp(&g, &ff_asf_digital_signature)) {
822 av_log(s, AV_LOG_INFO, "Digital signature detected!\n");
826 if (avio_tell(pb) != gpos + gsize)
827 av_log(s, AV_LOG_DEBUG,
828 "gpos mismatch our pos=%"PRIu64", end=%"PRId64"\n",
829 avio_tell(pb) - gpos, gsize);
830 avio_seek(pb, gpos + gsize, SEEK_SET);
838 asf->data_offset = avio_tell(pb);
839 asf->packet_size_left = 0;
841 for (i = 0; i < 128; i++) {
842 int stream_num = asf->asfid2avid[i];
843 if (stream_num >= 0) {
844 AVStream *st = s->streams[stream_num];
845 if (!st->codec->bit_rate)
846 st->codec->bit_rate = asf->stream_bitrates[i];
847 if (asf->dar[i].num > 0 && asf->dar[i].den > 0) {
848 av_reduce(&st->sample_aspect_ratio.num,
849 &st->sample_aspect_ratio.den,
850 asf->dar[i].num, asf->dar[i].den, INT_MAX);
851 } else if ((asf->dar[0].num > 0) && (asf->dar[0].den > 0) &&
852 // Use ASF container value if the stream doesn't set AR.
853 (st->codec->codec_type == AVMEDIA_TYPE_VIDEO))
854 av_reduce(&st->sample_aspect_ratio.num,
855 &st->sample_aspect_ratio.den,
856 asf->dar[0].num, asf->dar[0].den, INT_MAX);
858 av_log(s, AV_LOG_TRACE, "i=%d, st->codec->codec_type:%d, asf->dar %d:%d sar=%d:%d\n",
859 i, st->codec->codec_type, asf->dar[i].num, asf->dar[i].den,
860 st->sample_aspect_ratio.num, st->sample_aspect_ratio.den);
862 // copy and convert language codes to the frontend
863 if (asf->streams[i].stream_language_index < 128) {
864 const char *rfc1766 = asf->stream_languages[asf->streams[i].stream_language_index];
865 if (rfc1766 && strlen(rfc1766) > 1) {
866 const char primary_tag[3] = { rfc1766[0], rfc1766[1], '\0' }; // ignore country code if any
867 const char *iso6392 = av_convert_lang_to(primary_tag,
868 AV_LANG_ISO639_2_BIBL);
870 av_dict_set(&st->metadata, "language", iso6392, 0);
876 ff_metadata_conv(&s->metadata, NULL, ff_asf_metadata_conv);
881 #define DO_2BITS(bits, var, defval) \
882 switch (bits & 3) { \
884 var = avio_rl32(pb); \
888 var = avio_rl16(pb); \
901 * Load a single ASF packet into the demuxer.
902 * @param s demux context
903 * @param pb context to read data from
904 * @return 0 on success, <0 on error
906 static int asf_get_packet(AVFormatContext *s, AVIOContext *pb)
908 ASFContext *asf = s->priv_data;
909 uint32_t packet_length, padsize;
913 // if we do not know packet size, allow skipping up to 32 kB
915 if (asf->no_resync_search)
917 else if (s->packet_size > 0)
918 off = (avio_tell(pb) - s->internal->data_offset) % s->packet_size + 3;
925 if (c == 0x82 && !d && !e)
930 /* This code allows handling of -EAGAIN at packet boundaries (i.e.
931 * if the packet sync code above triggers -EAGAIN). This does not
932 * imply complete -EAGAIN handling support at random positions in
934 if (pb->error == AVERROR(EAGAIN))
935 return AVERROR(EAGAIN);
937 av_log(s, AV_LOG_ERROR,
938 "ff asf bad header %x at:%"PRId64"\n", c, avio_tell(pb));
940 if ((c & 0x8f) == 0x82) {
943 av_log(s, AV_LOG_ERROR, "ff asf bad non zero\n");
944 return AVERROR_INVALIDDATA;
949 } else if(!avio_feof(pb)) {
950 avio_seek(pb, -1, SEEK_CUR); // FIXME
953 asf->packet_flags = c;
954 asf->packet_property = d;
956 DO_2BITS(asf->packet_flags >> 5, packet_length, s->packet_size);
957 DO_2BITS(asf->packet_flags >> 1, padsize, 0); // sequence ignored
958 DO_2BITS(asf->packet_flags >> 3, padsize, 0); // padding length
960 // the following checks prevent overflows and infinite loops
961 if (!packet_length || packet_length >= (1U << 29)) {
962 av_log(s, AV_LOG_ERROR,
963 "invalid packet_length %"PRIu32" at:%"PRId64"\n",
964 packet_length, avio_tell(pb));
965 return AVERROR_INVALIDDATA;
967 if (padsize >= packet_length) {
968 av_log(s, AV_LOG_ERROR,
969 "invalid padsize %"PRIu32" at:%"PRId64"\n", padsize, avio_tell(pb));
970 return AVERROR_INVALIDDATA;
973 asf->packet_timestamp = avio_rl32(pb);
974 avio_rl16(pb); /* duration */
975 // rsize has at least 11 bytes which have to be present
977 if (asf->packet_flags & 0x01) {
978 asf->packet_segsizetype = avio_r8(pb);
980 asf->packet_segments = asf->packet_segsizetype & 0x3f;
982 asf->packet_segments = 1;
983 asf->packet_segsizetype = 0x80;
985 if (rsize > packet_length - padsize) {
986 asf->packet_size_left = 0;
987 av_log(s, AV_LOG_ERROR,
988 "invalid packet header length %d for pktlen %"PRIu32"-%"PRIu32" at %"PRId64"\n",
989 rsize, packet_length, padsize, avio_tell(pb));
990 return AVERROR_INVALIDDATA;
992 asf->packet_size_left = packet_length - padsize - rsize;
993 if (packet_length < asf->hdr.min_pktsize)
994 padsize += asf->hdr.min_pktsize - packet_length;
995 asf->packet_padsize = padsize;
996 av_log(s, AV_LOG_TRACE, "packet: size=%d padsize=%d left=%d\n",
997 s->packet_size, asf->packet_padsize, asf->packet_size_left);
1003 * @return <0 if error
1005 static int asf_read_frame_header(AVFormatContext *s, AVIOContext *pb)
1007 ASFContext *asf = s->priv_data;
1010 int num = avio_r8(pb);
1012 int64_t ts0, ts1 av_unused;
1014 asf->packet_segments--;
1015 asf->packet_key_frame = num >> 7;
1016 asf->stream_index = asf->asfid2avid[num & 0x7f];
1017 asfst = &asf->streams[num & 0x7f];
1018 // sequence should be ignored!
1019 DO_2BITS(asf->packet_property >> 4, asf->packet_seq, 0);
1020 DO_2BITS(asf->packet_property >> 2, asf->packet_frag_offset, 0);
1021 DO_2BITS(asf->packet_property, asf->packet_replic_size, 0);
1022 av_log(asf, AV_LOG_TRACE, "key:%d stream:%d seq:%d offset:%d replic_size:%d\n",
1023 asf->packet_key_frame, asf->stream_index, asf->packet_seq,
1024 asf->packet_frag_offset, asf->packet_replic_size);
1025 if (rsize+(int64_t)asf->packet_replic_size > asf->packet_size_left) {
1026 av_log(s, AV_LOG_ERROR, "packet_replic_size %d is invalid\n", asf->packet_replic_size);
1027 return AVERROR_INVALIDDATA;
1029 if (asf->packet_replic_size >= 8) {
1030 int64_t end = avio_tell(pb) + asf->packet_replic_size;
1032 asfst->packet_obj_size = avio_rl32(pb);
1033 if (asfst->packet_obj_size >= (1 << 24) || asfst->packet_obj_size <= 0) {
1034 av_log(s, AV_LOG_ERROR, "packet_obj_size invalid\n");
1035 asfst->packet_obj_size = 0;
1036 return AVERROR_INVALIDDATA;
1038 asf->packet_frag_timestamp = avio_rl32(pb); // timestamp
1040 for (i = 0; i < asfst->payload_ext_ct; i++) {
1041 ASFPayload *p = &asfst->payload[i];
1045 size = avio_rl16(pb);
1046 payend = avio_tell(pb) + size;
1048 av_log(s, AV_LOG_ERROR, "too long payload\n");
1053 // duration = avio_rl16(pb);
1056 aspect.num = avio_r8(pb);
1057 aspect.den = avio_r8(pb);
1058 if (aspect.num > 0 && aspect.den > 0 && asf->stream_index >= 0) {
1059 s->streams[asf->stream_index]->sample_aspect_ratio = aspect;
1064 ts0 = avio_rl64(pb);
1065 ts1 = avio_rl64(pb);
1066 if (ts0!= -1) asf->packet_frag_timestamp = ts0/10000;
1067 else asf->packet_frag_timestamp = AV_NOPTS_VALUE;
1078 avio_seek(pb, payend, SEEK_SET);
1081 avio_seek(pb, end, SEEK_SET);
1082 rsize += asf->packet_replic_size; // FIXME - check validity
1083 } else if (asf->packet_replic_size == 1) {
1084 // multipacket - frag_offset is beginning timestamp
1085 asf->packet_time_start = asf->packet_frag_offset;
1086 asf->packet_frag_offset = 0;
1087 asf->packet_frag_timestamp = asf->packet_timestamp;
1089 asf->packet_time_delta = avio_r8(pb);
1091 } else if (asf->packet_replic_size != 0) {
1092 av_log(s, AV_LOG_ERROR, "unexpected packet_replic_size of %d\n",
1093 asf->packet_replic_size);
1094 return AVERROR_INVALIDDATA;
1096 if (asf->packet_flags & 0x01) {
1097 DO_2BITS(asf->packet_segsizetype >> 6, asf->packet_frag_size, 0); // 0 is illegal
1098 if (rsize > asf->packet_size_left) {
1099 av_log(s, AV_LOG_ERROR, "packet_replic_size is invalid\n");
1100 return AVERROR_INVALIDDATA;
1101 } else if (asf->packet_frag_size > asf->packet_size_left - rsize) {
1102 if (asf->packet_frag_size > asf->packet_size_left - rsize + asf->packet_padsize) {
1103 av_log(s, AV_LOG_ERROR, "packet_frag_size is invalid (%d-%d)\n",
1104 asf->packet_size_left, rsize);
1105 return AVERROR_INVALIDDATA;
1107 int diff = asf->packet_frag_size - (asf->packet_size_left - rsize);
1108 asf->packet_size_left += diff;
1109 asf->packet_padsize -= diff;
1113 asf->packet_frag_size = asf->packet_size_left - rsize;
1115 if (asf->packet_replic_size == 1) {
1116 asf->packet_multi_size = asf->packet_frag_size;
1117 if (asf->packet_multi_size > asf->packet_size_left)
1118 return AVERROR_INVALIDDATA;
1120 asf->packet_size_left -= rsize;
1126 * Parse data from individual ASF packets (which were previously loaded
1127 * with asf_get_packet()).
1128 * @param s demux context
1129 * @param pb context to read data from
1130 * @param pkt pointer to store packet data into
1131 * @return 0 if data was stored in pkt, <0 on error or 1 if more ASF
1132 * packets need to be loaded (through asf_get_packet())
1134 static int asf_parse_packet(AVFormatContext *s, AVIOContext *pb, AVPacket *pkt)
1136 ASFContext *asf = s->priv_data;
1137 ASFStream *asf_st = 0;
1142 if (asf->packet_size_left < FRAME_HEADER_SIZE ||
1143 asf->packet_segments < 1 && asf->packet_time_start == 0) {
1144 int ret = asf->packet_size_left + asf->packet_padsize;
1150 asf->packet_pos = avio_tell(pb);
1151 if (asf->data_object_size != (uint64_t)-1 &&
1152 (asf->packet_pos - asf->data_object_offset >= asf->data_object_size))
1153 return AVERROR_EOF; /* Do not exceed the size of the data object */
1156 if (asf->packet_time_start == 0) {
1157 if (asf_read_frame_header(s, pb) < 0) {
1158 asf->packet_time_start = asf->packet_segments = 0;
1161 if (asf->stream_index < 0 ||
1162 s->streams[asf->stream_index]->discard >= AVDISCARD_ALL ||
1163 (!asf->packet_key_frame &&
1164 (s->streams[asf->stream_index]->discard >= AVDISCARD_NONKEY || asf->streams[s->streams[asf->stream_index]->id].skip_to_key))) {
1165 asf->packet_time_start = 0;
1166 /* unhandled packet (should not happen) */
1167 avio_skip(pb, asf->packet_frag_size);
1168 asf->packet_size_left -= asf->packet_frag_size;
1169 if (asf->stream_index < 0)
1170 av_log(s, AV_LOG_ERROR, "ff asf skip %d (unknown stream)\n",
1171 asf->packet_frag_size);
1174 asf->asf_st = &asf->streams[s->streams[asf->stream_index]->id];
1175 asf->asf_st->skip_to_key = 0;
1177 asf_st = asf->asf_st;
1180 if (!asf_st->frag_offset && asf->packet_frag_offset) {
1181 av_log(s, AV_LOG_TRACE, "skipping asf data pkt with fragment offset for "
1182 "stream:%d, expected:%d but got %d from pkt)\n",
1183 asf->stream_index, asf_st->frag_offset,
1184 asf->packet_frag_offset);
1185 avio_skip(pb, asf->packet_frag_size);
1186 asf->packet_size_left -= asf->packet_frag_size;
1190 if (asf->packet_replic_size == 1) {
1191 // frag_offset is here used as the beginning timestamp
1192 asf->packet_frag_timestamp = asf->packet_time_start;
1193 asf->packet_time_start += asf->packet_time_delta;
1194 asf_st->packet_obj_size = asf->packet_frag_size = avio_r8(pb);
1195 asf->packet_size_left--;
1196 asf->packet_multi_size--;
1197 if (asf->packet_multi_size < asf_st->packet_obj_size) {
1198 asf->packet_time_start = 0;
1199 avio_skip(pb, asf->packet_multi_size);
1200 asf->packet_size_left -= asf->packet_multi_size;
1203 asf->packet_multi_size -= asf_st->packet_obj_size;
1206 if (asf_st->pkt.size != asf_st->packet_obj_size ||
1207 // FIXME is this condition sufficient?
1208 asf_st->frag_offset + asf->packet_frag_size > asf_st->pkt.size) {
1211 if (asf_st->pkt.data) {
1212 av_log(s, AV_LOG_INFO,
1213 "freeing incomplete packet size %d, new %d\n",
1214 asf_st->pkt.size, asf_st->packet_obj_size);
1215 asf_st->frag_offset = 0;
1216 av_free_packet(&asf_st->pkt);
1219 if ((ret = av_new_packet(&asf_st->pkt, asf_st->packet_obj_size)) < 0)
1221 asf_st->seq = asf->packet_seq;
1222 if (asf->ts_is_pts) {
1223 asf_st->pkt.pts = asf->packet_frag_timestamp - asf->hdr.preroll;
1225 asf_st->pkt.dts = asf->packet_frag_timestamp - asf->hdr.preroll;
1226 asf_st->pkt.stream_index = asf->stream_index;
1227 asf_st->pkt.pos = asf_st->packet_pos = asf->packet_pos;
1228 asf_st->pkt_clean = 0;
1230 if (asf_st->pkt.data && asf_st->palette_changed) {
1232 pal = av_packet_new_side_data(&asf_st->pkt, AV_PKT_DATA_PALETTE,
1235 av_log(s, AV_LOG_ERROR, "Cannot append palette to packet\n");
1237 memcpy(pal, asf_st->palette, AVPALETTE_SIZE);
1238 asf_st->palette_changed = 0;
1241 av_log(asf, AV_LOG_TRACE, "new packet: stream:%d key:%d packet_key:%d audio:%d size:%d\n",
1242 asf->stream_index, asf->packet_key_frame,
1243 asf_st->pkt.flags & AV_PKT_FLAG_KEY,
1244 s->streams[asf->stream_index]->codec->codec_type == AVMEDIA_TYPE_AUDIO,
1245 asf_st->packet_obj_size);
1246 if (s->streams[asf->stream_index]->codec->codec_type == AVMEDIA_TYPE_AUDIO)
1247 asf->packet_key_frame = 1;
1248 if (asf->packet_key_frame)
1249 asf_st->pkt.flags |= AV_PKT_FLAG_KEY;
1253 av_log(asf, AV_LOG_TRACE, "READ PACKET s:%d os:%d o:%d,%d l:%d DATA:%p\n",
1254 s->packet_size, asf_st->pkt.size, asf->packet_frag_offset,
1255 asf_st->frag_offset, asf->packet_frag_size, asf_st->pkt.data);
1256 asf->packet_size_left -= asf->packet_frag_size;
1257 if (asf->packet_size_left < 0)
1260 if (asf->packet_frag_offset >= asf_st->pkt.size ||
1261 asf->packet_frag_size > asf_st->pkt.size - asf->packet_frag_offset) {
1262 av_log(s, AV_LOG_ERROR,
1263 "packet fragment position invalid %u,%u not in %u\n",
1264 asf->packet_frag_offset, asf->packet_frag_size,
1269 if (asf->packet_frag_offset != asf_st->frag_offset && !asf_st->pkt_clean) {
1270 memset(asf_st->pkt.data + asf_st->frag_offset, 0, asf_st->pkt.size - asf_st->frag_offset);
1271 asf_st->pkt_clean = 1;
1274 ret = avio_read(pb, asf_st->pkt.data + asf->packet_frag_offset,
1275 asf->packet_frag_size);
1276 if (ret != asf->packet_frag_size) {
1277 if (ret < 0 || asf->packet_frag_offset + ret == 0)
1278 return ret < 0 ? ret : AVERROR_EOF;
1280 if (asf_st->ds_span > 1) {
1281 // scrambling, we can either drop it completely or fill the remainder
1282 // TODO: should we fill the whole packet instead of just the current
1284 memset(asf_st->pkt.data + asf->packet_frag_offset + ret, 0,
1285 asf->packet_frag_size - ret);
1286 ret = asf->packet_frag_size;
1288 // no scrambling, so we can return partial packets
1289 av_shrink_packet(&asf_st->pkt, asf->packet_frag_offset + ret);
1292 if (s->key && s->keylen == 20)
1293 ff_asfcrypt_dec(s->key, asf_st->pkt.data + asf->packet_frag_offset,
1295 asf_st->frag_offset += ret;
1296 /* test if whole packet is read */
1297 if (asf_st->frag_offset == asf_st->pkt.size) {
1298 // workaround for macroshit radio DVR-MS files
1299 if (s->streams[asf->stream_index]->codec->codec_id == AV_CODEC_ID_MPEG2VIDEO &&
1300 asf_st->pkt.size > 100) {
1302 for (i = 0; i < asf_st->pkt.size && !asf_st->pkt.data[i]; i++)
1304 if (i == asf_st->pkt.size) {
1305 av_log(s, AV_LOG_DEBUG, "discarding ms fart\n");
1306 asf_st->frag_offset = 0;
1307 av_free_packet(&asf_st->pkt);
1313 if (asf_st->ds_span > 1) {
1314 if (asf_st->pkt.size != asf_st->ds_packet_size * asf_st->ds_span) {
1315 av_log(s, AV_LOG_ERROR,
1316 "pkt.size != ds_packet_size * ds_span (%d %d %d)\n",
1317 asf_st->pkt.size, asf_st->ds_packet_size,
1320 /* packet descrambling */
1321 AVBufferRef *buf = av_buffer_alloc(asf_st->pkt.size +
1322 FF_INPUT_BUFFER_PADDING_SIZE);
1324 uint8_t *newdata = buf->data;
1326 memset(newdata + asf_st->pkt.size, 0,
1327 FF_INPUT_BUFFER_PADDING_SIZE);
1328 while (offset < asf_st->pkt.size) {
1329 int off = offset / asf_st->ds_chunk_size;
1330 int row = off / asf_st->ds_span;
1331 int col = off % asf_st->ds_span;
1332 int idx = row + col * asf_st->ds_packet_size / asf_st->ds_chunk_size;
1333 assert(offset + asf_st->ds_chunk_size <= asf_st->pkt.size);
1334 assert(idx + 1 <= asf_st->pkt.size / asf_st->ds_chunk_size);
1335 memcpy(newdata + offset,
1336 asf_st->pkt.data + idx * asf_st->ds_chunk_size,
1337 asf_st->ds_chunk_size);
1338 offset += asf_st->ds_chunk_size;
1340 av_buffer_unref(&asf_st->pkt.buf);
1341 asf_st->pkt.buf = buf;
1342 asf_st->pkt.data = buf->data;
1346 asf_st->frag_offset = 0;
1348 #if FF_API_DESTRUCT_PACKET
1349 FF_DISABLE_DEPRECATION_WARNINGS
1350 asf_st->pkt.destruct = NULL;
1351 FF_ENABLE_DEPRECATION_WARNINGS
1353 asf_st->pkt.buf = 0;
1354 asf_st->pkt.size = 0;
1355 asf_st->pkt.data = 0;
1356 asf_st->pkt.side_data_elems = 0;
1357 asf_st->pkt.side_data = NULL;
1358 break; // packet completed
1364 static int asf_read_packet(AVFormatContext *s, AVPacket *pkt)
1366 ASFContext *asf = s->priv_data;
1371 /* parse cached packets, if any */
1372 if ((ret = asf_parse_packet(s, s->pb, pkt)) <= 0)
1374 if ((ret = asf_get_packet(s, s->pb)) < 0)
1375 assert(asf->packet_size_left < FRAME_HEADER_SIZE ||
1376 asf->packet_segments < 1);
1377 asf->packet_time_start = 0;
1381 // Added to support seeking after packets have been read
1382 // If information is not reset, read_packet fails due to
1383 // leftover information from previous reads
1384 static void asf_reset_header(AVFormatContext *s)
1386 ASFContext *asf = s->priv_data;
1390 asf->packet_size_left = 0;
1391 asf->packet_flags = 0;
1392 asf->packet_property = 0;
1393 asf->packet_timestamp = 0;
1394 asf->packet_segsizetype = 0;
1395 asf->packet_segments = 0;
1396 asf->packet_seq = 0;
1397 asf->packet_replic_size = 0;
1398 asf->packet_key_frame = 0;
1399 asf->packet_padsize = 0;
1400 asf->packet_frag_offset = 0;
1401 asf->packet_frag_size = 0;
1402 asf->packet_frag_timestamp = 0;
1403 asf->packet_multi_size = 0;
1404 asf->packet_time_delta = 0;
1405 asf->packet_time_start = 0;
1407 for (i = 0; i < 128; i++) {
1408 asf_st = &asf->streams[i];
1409 av_free_packet(&asf_st->pkt);
1410 asf_st->packet_obj_size = 0;
1411 asf_st->frag_offset = 0;
1417 static void skip_to_key(AVFormatContext *s)
1419 ASFContext *asf = s->priv_data;
1422 for (i = 0; i < 128; i++) {
1423 int j = asf->asfid2avid[i];
1424 ASFStream *asf_st = &asf->streams[i];
1425 if (j < 0 || s->streams[j]->codec->codec_type != AVMEDIA_TYPE_VIDEO)
1428 asf_st->skip_to_key = 1;
1432 static int asf_read_close(AVFormatContext *s)
1434 asf_reset_header(s);
1439 static int64_t asf_read_pts(AVFormatContext *s, int stream_index,
1440 int64_t *ppos, int64_t pos_limit)
1442 ASFContext *asf = s->priv_data;
1443 AVPacket pkt1, *pkt = &pkt1;
1446 int64_t pos = *ppos;
1448 int64_t start_pos[ASF_MAX_STREAMS];
1450 for (i = 0; i < s->nb_streams; i++)
1453 if (s->packet_size > 0)
1454 pos = (pos + s->packet_size - 1 - s->internal->data_offset) /
1455 s->packet_size * s->packet_size +
1456 s->internal->data_offset;
1458 if (avio_seek(s->pb, pos, SEEK_SET) < 0)
1459 return AV_NOPTS_VALUE;
1461 ff_read_frame_flush(s);
1462 asf_reset_header(s);
1464 if (av_read_frame(s, pkt) < 0) {
1465 av_log(s, AV_LOG_INFO, "asf_read_pts failed\n");
1466 return AV_NOPTS_VALUE;
1471 av_free_packet(pkt);
1472 if (pkt->flags & AV_PKT_FLAG_KEY) {
1473 i = pkt->stream_index;
1475 asf_st = &asf->streams[s->streams[i]->id];
1477 // assert((asf_st->packet_pos - s->data_offset) % s->packet_size == 0);
1478 pos = asf_st->packet_pos;
1480 av_add_index_entry(s->streams[i], pos, pts, pkt->size,
1481 pos - start_pos[i] + 1, AVINDEX_KEYFRAME);
1482 start_pos[i] = asf_st->packet_pos + 1;
1484 if (pkt->stream_index == stream_index)
1493 static int asf_build_simple_index(AVFormatContext *s, int stream_index)
1496 ASFContext *asf = s->priv_data;
1497 int64_t current_pos = avio_tell(s->pb);
1500 if((ret = avio_seek(s->pb, asf->data_object_offset + asf->data_object_size, SEEK_SET)) < 0) {
1504 if ((ret = ff_get_guid(s->pb, &g)) < 0)
1507 /* the data object can be followed by other top-level objects,
1508 * skip them until the simple index object is reached */
1509 while (ff_guidcmp(&g, &ff_asf_simple_index_header)) {
1510 int64_t gsize = avio_rl64(s->pb);
1511 if (gsize < 24 || avio_feof(s->pb)) {
1514 avio_skip(s->pb, gsize - 24);
1515 if ((ret = ff_get_guid(s->pb, &g)) < 0)
1520 int64_t itime, last_pos = -1;
1523 int64_t av_unused gsize = avio_rl64(s->pb);
1524 if ((ret = ff_get_guid(s->pb, &g)) < 0)
1526 itime = avio_rl64(s->pb);
1527 pct = avio_rl32(s->pb);
1528 ict = avio_rl32(s->pb);
1529 av_log(s, AV_LOG_DEBUG,
1530 "itime:0x%"PRIx64", pct:%d, ict:%d\n", itime, pct, ict);
1532 for (i = 0; i < ict; i++) {
1533 int pktnum = avio_rl32(s->pb);
1534 int pktct = avio_rl16(s->pb);
1535 int64_t pos = s->internal->data_offset + s->packet_size * (int64_t)pktnum;
1536 int64_t index_pts = FFMAX(av_rescale(itime, i, 10000) - asf->hdr.preroll, 0);
1538 if (pos != last_pos) {
1539 av_log(s, AV_LOG_DEBUG, "pktnum:%d, pktct:%d pts: %"PRId64"\n",
1540 pktnum, pktct, index_pts);
1541 av_add_index_entry(s->streams[stream_index], pos, index_pts,
1542 s->packet_size, 0, AVINDEX_KEYFRAME);
1546 asf->index_read = ict > 1;
1549 // if (avio_feof(s->pb)) {
1552 avio_seek(s->pb, current_pos, SEEK_SET);
1556 static int asf_read_seek(AVFormatContext *s, int stream_index,
1557 int64_t pts, int flags)
1559 ASFContext *asf = s->priv_data;
1560 AVStream *st = s->streams[stream_index];
1563 if (s->packet_size <= 0)
1566 /* Try using the protocol's read_seek if available */
1568 int64_t ret = avio_seek_time(s->pb, stream_index, pts, flags);
1570 asf_reset_header(s);
1571 if (ret != AVERROR(ENOSYS))
1575 /* explicitly handle the case of seeking to 0 */
1577 asf_reset_header(s);
1578 avio_seek(s->pb, s->internal->data_offset, SEEK_SET);
1582 if (!asf->index_read) {
1583 ret = asf_build_simple_index(s, stream_index);
1585 asf->index_read = -1;
1588 if (asf->index_read > 0 && st->index_entries) {
1589 int index = av_index_search_timestamp(st, pts, flags);
1591 /* find the position */
1592 uint64_t pos = st->index_entries[index].pos;
1595 av_log(s, AV_LOG_DEBUG, "SEEKTO: %"PRId64"\n", pos);
1596 if(avio_seek(s->pb, pos, SEEK_SET) < 0)
1598 asf_reset_header(s);
1603 /* no index or seeking by index failed */
1604 if (ff_seek_frame_binary(s, stream_index, pts, flags) < 0)
1606 asf_reset_header(s);
1611 AVInputFormat ff_asf_demuxer = {
1613 .long_name = NULL_IF_CONFIG_SMALL("ASF (Advanced / Active Streaming Format)"),
1614 .priv_data_size = sizeof(ASFContext),
1615 .read_probe = asf_probe,
1616 .read_header = asf_read_header,
1617 .read_packet = asf_read_packet,
1618 .read_close = asf_read_close,
1619 .read_seek = asf_read_seek,
1620 .read_timestamp = asf_read_pts,
1621 .flags = AVFMT_NOBINSEARCH | AVFMT_NOGENSEARCH,
1622 .priv_class = &asf_class,