2 * ASF compatible demuxer
3 * Copyright (c) 2000, 2001 Fabrice Bellard
5 * This file is part of FFmpeg.
7 * FFmpeg is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
12 * FFmpeg is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with FFmpeg; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
24 #include "libavutil/attributes.h"
25 #include "libavutil/avassert.h"
26 #include "libavutil/avstring.h"
27 #include "libavutil/bswap.h"
28 #include "libavutil/common.h"
29 #include "libavutil/dict.h"
30 #include "libavutil/internal.h"
31 #include "libavutil/mathematics.h"
32 #include "libavutil/opt.h"
34 #include "avio_internal.h"
35 #include "avlanguage.h"
42 typedef struct ASFPayload {
47 typedef struct ASFStream {
59 int ds_span; /* descrambling */
65 uint16_t stream_language_index;
68 uint32_t palette[256];
71 ASFPayload payload[8];
74 typedef struct ASFContext {
76 int asfid2avid[128]; ///< conversion table from asf ID 2 AVStream ID
77 ASFStream streams[128]; ///< it's max number and it's not that big
78 uint32_t stream_bitrates[128]; ///< max number of streams, bitrate for each (for streaming)
80 char stream_languages[128][6]; ///< max number of streams, language for each (RFC1766, e.g. en-US)
81 /* non streamed additonnal info */
84 /* only for reading */
85 uint64_t data_offset; ///< beginning of the first data packet
86 uint64_t data_object_offset; ///< data object offset (excl. GUID & size)
87 uint64_t data_object_size; ///< size of the data object
95 int packet_segsizetype;
98 int packet_replic_size;
101 unsigned int packet_frag_offset;
102 unsigned int packet_frag_size;
103 int64_t packet_frag_timestamp;
105 int packet_multi_size;
106 int packet_time_delta;
107 int packet_time_start;
112 ASFStream *asf_st; ///< currently decoded stream
114 int no_resync_search;
118 static const AVOption options[] = {
119 { "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 },
120 { "export_xmp", "Export full XMP metadata", offsetof(ASFContext, export_xmp), AV_OPT_TYPE_INT, { .i64 = 0 }, 0, 1, AV_OPT_FLAG_DECODING_PARAM },
124 static const AVClass asf_class = {
125 .class_name = "asf demuxer",
126 .item_name = av_default_item_name,
128 .version = LIBAVUTIL_VERSION_INT,
134 #define ASF_MAX_STREAMS 127
135 #define FRAME_HEADER_SIZE 6
136 // Fix Me! FRAME_HEADER_SIZE may be different.
137 // (7 is known to be too large for GipsyGuitar.wmv)
140 static const ff_asf_guid stream_bitrate_guid = { /* (http://get.to/sdp) */
141 0xce, 0x75, 0xf8, 0x7b, 0x8d, 0x46, 0xd1, 0x11, 0x8d, 0x82, 0x00, 0x60, 0x97, 0xc9, 0xa2, 0xb2
144 #define PRINT_IF_GUID(g, cmp) \
145 if (!ff_guidcmp(g, &cmp)) \
146 av_log(NULL, AV_LOG_TRACE, "(GUID: %s) ", # cmp)
148 static void print_guid(ff_asf_guid *g)
151 PRINT_IF_GUID(g, ff_asf_header);
152 else PRINT_IF_GUID(g, ff_asf_file_header);
153 else PRINT_IF_GUID(g, ff_asf_stream_header);
154 else PRINT_IF_GUID(g, ff_asf_audio_stream);
155 else PRINT_IF_GUID(g, ff_asf_audio_conceal_none);
156 else PRINT_IF_GUID(g, ff_asf_video_stream);
157 else PRINT_IF_GUID(g, ff_asf_video_conceal_none);
158 else PRINT_IF_GUID(g, ff_asf_command_stream);
159 else PRINT_IF_GUID(g, ff_asf_comment_header);
160 else PRINT_IF_GUID(g, ff_asf_codec_comment_header);
161 else PRINT_IF_GUID(g, ff_asf_codec_comment1_header);
162 else PRINT_IF_GUID(g, ff_asf_data_header);
163 else PRINT_IF_GUID(g, ff_asf_simple_index_header);
164 else PRINT_IF_GUID(g, ff_asf_head1_guid);
165 else PRINT_IF_GUID(g, ff_asf_head2_guid);
166 else PRINT_IF_GUID(g, ff_asf_my_guid);
167 else PRINT_IF_GUID(g, ff_asf_ext_stream_header);
168 else PRINT_IF_GUID(g, ff_asf_extended_content_header);
169 else PRINT_IF_GUID(g, ff_asf_ext_stream_embed_stream_header);
170 else PRINT_IF_GUID(g, ff_asf_ext_stream_audio_stream);
171 else PRINT_IF_GUID(g, ff_asf_metadata_header);
172 else PRINT_IF_GUID(g, ff_asf_metadata_library_header);
173 else PRINT_IF_GUID(g, ff_asf_marker_header);
174 else PRINT_IF_GUID(g, stream_bitrate_guid);
175 else PRINT_IF_GUID(g, ff_asf_language_guid);
177 av_log(NULL, AV_LOG_TRACE, "(GUID: unknown) ");
178 for (i = 0; i < 16; i++)
179 av_log(NULL, AV_LOG_TRACE, " 0x%02x,", (*g)[i]);
180 av_log(NULL, AV_LOG_TRACE, "}\n");
184 #define print_guid(g) while(0)
187 static int asf_probe(AVProbeData *pd)
189 /* check file header */
190 if (!ff_guidcmp(pd->buf, &ff_asf_header))
191 return AVPROBE_SCORE_MAX;
196 /* size of type 2 (BOOL) is 32bit for "Extended Content Description Object"
197 * but 16 bit for "Metadata Object" and "Metadata Library Object" */
198 static int get_value(AVIOContext *pb, int type, int type2_size)
202 return (type2_size == 32) ? avio_rl32(pb) : avio_rl16(pb);
204 return avio_rl32(pb);
206 return avio_rl64(pb);
208 return avio_rl16(pb);
214 /* MSDN claims that this should be "compatible with the ID3 frame, APIC",
215 * but in reality this is only loosely similar */
216 static int asf_read_picture(AVFormatContext *s, int len)
218 AVPacket pkt = { 0 };
219 const CodecMime *mime = ff_id3v2_mime_tags;
220 enum AVCodecID id = AV_CODEC_ID_NONE;
222 uint8_t *desc = NULL;
224 int ret, type, picsize, desc_len;
226 /* type + picsize + mime + desc */
227 if (len < 1 + 4 + 2 + 2) {
228 av_log(s, AV_LOG_ERROR, "Invalid attached picture size: %d.\n", len);
229 return AVERROR_INVALIDDATA;
233 type = avio_r8(s->pb);
235 if (type >= FF_ARRAY_ELEMS(ff_id3v2_picture_types) || type < 0) {
236 av_log(s, AV_LOG_WARNING, "Unknown attached picture type: %d.\n", type);
240 /* picture data size */
241 picsize = avio_rl32(s->pb);
244 /* picture MIME type */
245 len -= avio_get_str16le(s->pb, len, mimetype, sizeof(mimetype));
246 while (mime->id != AV_CODEC_ID_NONE) {
247 if (!strncmp(mime->str, mimetype, sizeof(mimetype))) {
253 if (id == AV_CODEC_ID_NONE) {
254 av_log(s, AV_LOG_ERROR, "Unknown attached picture mimetype: %s.\n",
259 if (picsize >= len) {
260 av_log(s, AV_LOG_ERROR, "Invalid attached picture data size: %d >= %d.\n",
262 return AVERROR_INVALIDDATA;
265 /* picture description */
266 desc_len = (len - picsize) * 2 + 1;
267 desc = av_malloc(desc_len);
269 return AVERROR(ENOMEM);
270 len -= avio_get_str16le(s->pb, len - picsize, desc, desc_len);
272 ret = av_get_packet(s->pb, &pkt, picsize);
276 st = avformat_new_stream(s, NULL);
278 ret = AVERROR(ENOMEM);
281 st->disposition |= AV_DISPOSITION_ATTACHED_PIC;
282 st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
283 st->codec->codec_id = id;
284 st->attached_pic = pkt;
285 st->attached_pic.stream_index = st->index;
286 st->attached_pic.flags |= AV_PKT_FLAG_KEY;
289 av_dict_set(&st->metadata, "title", desc, AV_DICT_DONT_STRDUP_VAL);
293 av_dict_set(&st->metadata, "comment", ff_id3v2_picture_types[type], 0);
299 av_free_packet(&pkt);
303 static void get_id3_tag(AVFormatContext *s, int len)
305 ID3v2ExtraMeta *id3v2_extra_meta = NULL;
307 ff_id3v2_read(s, ID3v2_DEFAULT_MAGIC, &id3v2_extra_meta, len);
308 if (id3v2_extra_meta)
309 ff_id3v2_parse_apic(s, &id3v2_extra_meta);
310 ff_id3v2_free_extra_meta(&id3v2_extra_meta);
313 static void get_tag(AVFormatContext *s, const char *key, int type, int len, int type2_size)
315 ASFContext *asf = s->priv_data;
317 int64_t off = avio_tell(s->pb);
320 if ((unsigned)len >= (UINT_MAX - LEN) / 2)
323 if (!asf->export_xmp && !strncmp(key, "xmp", 3))
326 value = av_malloc(2 * len + LEN);
330 if (type == 0) { // UTF16-LE
331 avio_get_str16le(s->pb, len, value, 2 * len + 1);
332 } else if (type == -1) { // ASCII
333 avio_read(s->pb, value, len);
335 } else if (type == 1) { // byte array
336 if (!strcmp(key, "WM/Picture")) { // handle cover art
337 asf_read_picture(s, len);
338 } else if (!strcmp(key, "ID3")) { // handle ID3 tag
341 av_log(s, AV_LOG_VERBOSE, "Unsupported byte array in tag %s.\n", key);
344 } else if (type > 1 && type <= 5) { // boolean or DWORD or QWORD or WORD
345 uint64_t num = get_value(s->pb, type, type2_size);
346 snprintf(value, LEN, "%"PRIu64, num);
347 } else if (type == 6) { // (don't) handle GUID
348 av_log(s, AV_LOG_DEBUG, "Unsupported GUID value in tag %s.\n", key);
351 av_log(s, AV_LOG_DEBUG,
352 "Unsupported value type %d in tag %s.\n", type, key);
356 av_dict_set(&s->metadata, key, value, 0);
360 avio_seek(s->pb, off + len, SEEK_SET);
363 static int asf_read_file_properties(AVFormatContext *s, int64_t size)
365 ASFContext *asf = s->priv_data;
366 AVIOContext *pb = s->pb;
368 ff_get_guid(pb, &asf->hdr.guid);
369 asf->hdr.file_size = avio_rl64(pb);
370 asf->hdr.create_time = avio_rl64(pb);
371 avio_rl64(pb); /* number of packets */
372 asf->hdr.play_time = avio_rl64(pb);
373 asf->hdr.send_time = avio_rl64(pb);
374 asf->hdr.preroll = avio_rl32(pb);
375 asf->hdr.ignore = avio_rl32(pb);
376 asf->hdr.flags = avio_rl32(pb);
377 asf->hdr.min_pktsize = avio_rl32(pb);
378 asf->hdr.max_pktsize = avio_rl32(pb);
379 if (asf->hdr.min_pktsize >= (1U << 29))
380 return AVERROR_INVALIDDATA;
381 asf->hdr.max_bitrate = avio_rl32(pb);
382 s->packet_size = asf->hdr.max_pktsize;
387 static int asf_read_stream_properties(AVFormatContext *s, int64_t size)
389 ASFContext *asf = s->priv_data;
390 AVIOContext *pb = s->pb;
394 enum AVMediaType type;
395 int type_specific_size, sizeX;
397 int64_t pos1, pos2, start_time;
398 int test_for_ext_stream_audio, is_dvr_ms_audio = 0;
400 if (s->nb_streams == ASF_MAX_STREAMS) {
401 av_log(s, AV_LOG_ERROR, "too many streams\n");
402 return AVERROR(EINVAL);
405 pos1 = avio_tell(pb);
407 st = avformat_new_stream(s, NULL);
409 return AVERROR(ENOMEM);
410 avpriv_set_pts_info(st, 32, 1, 1000); /* 32 bit pts in ms */
411 start_time = asf->hdr.preroll;
413 if (!(asf->hdr.flags & 0x01)) { // if we aren't streaming...
414 int64_t fsize = avio_size(pb);
415 if (fsize <= 0 || (int64_t)asf->hdr.file_size <= 0 ||
416 20*FFABS(fsize - (int64_t)asf->hdr.file_size) < FFMIN(fsize, asf->hdr.file_size))
417 st->duration = asf->hdr.play_time /
418 (10000000 / 1000) - start_time;
422 test_for_ext_stream_audio = 0;
423 if (!ff_guidcmp(&g, &ff_asf_audio_stream)) {
424 type = AVMEDIA_TYPE_AUDIO;
425 } else if (!ff_guidcmp(&g, &ff_asf_video_stream)) {
426 type = AVMEDIA_TYPE_VIDEO;
427 } else if (!ff_guidcmp(&g, &ff_asf_jfif_media)) {
428 type = AVMEDIA_TYPE_VIDEO;
429 st->codec->codec_id = AV_CODEC_ID_MJPEG;
430 } else if (!ff_guidcmp(&g, &ff_asf_command_stream)) {
431 type = AVMEDIA_TYPE_DATA;
432 } else if (!ff_guidcmp(&g, &ff_asf_ext_stream_embed_stream_header)) {
433 test_for_ext_stream_audio = 1;
434 type = AVMEDIA_TYPE_UNKNOWN;
439 avio_skip(pb, 8); /* total_size */
440 type_specific_size = avio_rl32(pb);
442 st->id = avio_rl16(pb) & 0x7f; /* stream id */
443 // mapping of asf ID to AV stream ID;
444 asf->asfid2avid[st->id] = s->nb_streams - 1;
445 asf_st = &asf->streams[st->id];
449 if (test_for_ext_stream_audio) {
451 if (!ff_guidcmp(&g, &ff_asf_ext_stream_audio_stream)) {
452 type = AVMEDIA_TYPE_AUDIO;
463 st->codec->codec_type = type;
464 if (type == AVMEDIA_TYPE_AUDIO) {
465 int ret = ff_get_wav_header(pb, st->codec, type_specific_size, 0);
468 if (is_dvr_ms_audio) {
469 // codec_id and codec_tag are unreliable in dvr_ms
470 // files. Set them later by probing stream.
471 st->request_probe = 1;
472 st->codec->codec_tag = 0;
474 if (st->codec->codec_id == AV_CODEC_ID_AAC)
475 st->need_parsing = AVSTREAM_PARSE_NONE;
477 st->need_parsing = AVSTREAM_PARSE_FULL;
478 /* We have to init the frame size at some point .... */
479 pos2 = avio_tell(pb);
480 if (size >= (pos2 + 8 - pos1 + 24)) {
481 asf_st->ds_span = avio_r8(pb);
482 asf_st->ds_packet_size = avio_rl16(pb);
483 asf_st->ds_chunk_size = avio_rl16(pb);
484 avio_rl16(pb); // ds_data_size
485 avio_r8(pb); // ds_silence_data
487 if (asf_st->ds_span > 1) {
488 if (!asf_st->ds_chunk_size ||
489 (asf_st->ds_packet_size / asf_st->ds_chunk_size <= 1) ||
490 asf_st->ds_packet_size % asf_st->ds_chunk_size)
491 asf_st->ds_span = 0; // disable descrambling
493 } else if (type == AVMEDIA_TYPE_VIDEO &&
494 size - (avio_tell(pb) - pos1 + 24) >= 51) {
498 avio_rl16(pb); /* size */
499 sizeX = avio_rl32(pb); /* size */
500 st->codec->width = avio_rl32(pb);
501 st->codec->height = avio_rl32(pb);
502 /* not available for asf */
503 avio_rl16(pb); /* panes */
504 st->codec->bits_per_coded_sample = avio_rl16(pb); /* depth */
505 tag1 = avio_rl32(pb);
508 st->codec->extradata_size = ffio_limit(pb, sizeX - 40);
509 st->codec->extradata = av_mallocz(st->codec->extradata_size +
510 FF_INPUT_BUFFER_PADDING_SIZE);
511 if (!st->codec->extradata)
512 return AVERROR(ENOMEM);
513 avio_read(pb, st->codec->extradata, st->codec->extradata_size);
516 /* Extract palette from extradata if bpp <= 8 */
517 /* This code assumes that extradata contains only palette */
518 /* This is true for all paletted codecs implemented in libavcodec */
519 if (st->codec->extradata_size && (st->codec->bits_per_coded_sample <= 8)) {
522 for (i = 0; i < FFMIN(st->codec->extradata_size, AVPALETTE_SIZE) / 4; i++)
523 asf_st->palette[i] = av_bswap32(((uint32_t *)st->codec->extradata)[i]);
525 memcpy(asf_st->palette, st->codec->extradata,
526 FFMIN(st->codec->extradata_size, AVPALETTE_SIZE));
528 asf_st->palette_changed = 1;
531 st->codec->codec_tag = tag1;
532 st->codec->codec_id = ff_codec_get_id(ff_codec_bmp_tags, tag1);
533 if (tag1 == MKTAG('D', 'V', 'R', ' ')) {
534 st->need_parsing = AVSTREAM_PARSE_FULL;
535 /* issue658 contains wrong w/h and MS even puts a fake seq header
536 * with wrong w/h in extradata while a correct one is in the stream.
537 * maximum lameness */
539 st->codec->height = 0;
540 av_freep(&st->codec->extradata);
541 st->codec->extradata_size = 0;
543 if (st->codec->codec_id == AV_CODEC_ID_H264)
544 st->need_parsing = AVSTREAM_PARSE_FULL_ONCE;
545 if (st->codec->codec_id == AV_CODEC_ID_MPEG4)
546 st->need_parsing = AVSTREAM_PARSE_FULL_ONCE;
548 pos2 = avio_tell(pb);
549 avio_skip(pb, size - (pos2 - pos1 + 24));
554 static int asf_read_ext_stream_properties(AVFormatContext *s, int64_t size)
556 ASFContext *asf = s->priv_data;
557 AVIOContext *pb = s->pb;
559 int ext_len, payload_ext_ct, stream_ct, i;
560 uint32_t leak_rate, stream_num;
561 unsigned int stream_languageid_index;
563 avio_rl64(pb); // starttime
564 avio_rl64(pb); // endtime
565 leak_rate = avio_rl32(pb); // leak-datarate
566 avio_rl32(pb); // bucket-datasize
567 avio_rl32(pb); // init-bucket-fullness
568 avio_rl32(pb); // alt-leak-datarate
569 avio_rl32(pb); // alt-bucket-datasize
570 avio_rl32(pb); // alt-init-bucket-fullness
571 avio_rl32(pb); // max-object-size
572 avio_rl32(pb); // flags (reliable,seekable,no_cleanpoints?,resend-live-cleanpoints, rest of bits reserved)
573 stream_num = avio_rl16(pb); // stream-num
575 stream_languageid_index = avio_rl16(pb); // stream-language-id-index
576 if (stream_num < 128)
577 asf->streams[stream_num].stream_language_index = stream_languageid_index;
579 avio_rl64(pb); // avg frametime in 100ns units
580 stream_ct = avio_rl16(pb); // stream-name-count
581 payload_ext_ct = avio_rl16(pb); // payload-extension-system-count
583 if (stream_num < 128) {
584 asf->stream_bitrates[stream_num] = leak_rate;
585 asf->streams[stream_num].payload_ext_ct = 0;
588 for (i = 0; i < stream_ct; i++) {
590 ext_len = avio_rl16(pb);
591 avio_skip(pb, ext_len);
594 for (i = 0; i < payload_ext_ct; i++) {
597 size = avio_rl16(pb);
598 ext_len = avio_rl32(pb);
599 avio_skip(pb, ext_len);
600 if (stream_num < 128 && i < FF_ARRAY_ELEMS(asf->streams[stream_num].payload)) {
601 ASFPayload *p = &asf->streams[stream_num].payload[i];
604 av_log(s, AV_LOG_DEBUG, "Payload extension %x %d\n", g[0], p->size );
605 asf->streams[stream_num].payload_ext_ct ++;
612 static int asf_read_content_desc(AVFormatContext *s, int64_t size)
614 AVIOContext *pb = s->pb;
615 int len1, len2, len3, len4, len5;
617 len1 = avio_rl16(pb);
618 len2 = avio_rl16(pb);
619 len3 = avio_rl16(pb);
620 len4 = avio_rl16(pb);
621 len5 = avio_rl16(pb);
622 get_tag(s, "title", 0, len1, 32);
623 get_tag(s, "author", 0, len2, 32);
624 get_tag(s, "copyright", 0, len3, 32);
625 get_tag(s, "comment", 0, len4, 32);
631 static int asf_read_ext_content_desc(AVFormatContext *s, int64_t size)
633 AVIOContext *pb = s->pb;
634 ASFContext *asf = s->priv_data;
635 int desc_count, i, ret;
637 desc_count = avio_rl16(pb);
638 for (i = 0; i < desc_count; i++) {
639 int name_len, value_type, value_len;
642 name_len = avio_rl16(pb);
643 if (name_len % 2) // must be even, broken lavf versions wrote len-1
645 if ((ret = avio_get_str16le(pb, name_len, name, sizeof(name))) < name_len)
646 avio_skip(pb, name_len - ret);
647 value_type = avio_rl16(pb);
648 value_len = avio_rl16(pb);
649 if (!value_type && value_len % 2)
651 /* My sample has that stream set to 0 maybe that mean the container.
652 * ASF stream count starts at 1. I am using 0 to the container value
653 * since it's unused. */
654 if (!strcmp(name, "AspectRatioX"))
655 asf->dar[0].num = get_value(s->pb, value_type, 32);
656 else if (!strcmp(name, "AspectRatioY"))
657 asf->dar[0].den = get_value(s->pb, value_type, 32);
659 get_tag(s, name, value_type, value_len, 32);
665 static int asf_read_language_list(AVFormatContext *s, int64_t size)
667 AVIOContext *pb = s->pb;
668 ASFContext *asf = s->priv_data;
670 int stream_count = avio_rl16(pb);
671 for (j = 0; j < stream_count; j++) {
673 unsigned int lang_len = avio_r8(pb);
674 if ((ret = avio_get_str16le(pb, lang_len, lang,
675 sizeof(lang))) < lang_len)
676 avio_skip(pb, lang_len - ret);
678 av_strlcpy(asf->stream_languages[j], lang,
679 sizeof(*asf->stream_languages));
685 static int asf_read_metadata(AVFormatContext *s, int64_t size)
687 AVIOContext *pb = s->pb;
688 ASFContext *asf = s->priv_data;
689 int n, stream_num, name_len, value_len;
693 for (i = 0; i < n; i++) {
697 avio_rl16(pb); // lang_list_index
698 stream_num = avio_rl16(pb);
699 name_len = avio_rl16(pb);
700 value_type = avio_rl16(pb); /* value_type */
701 value_len = avio_rl32(pb);
703 if ((ret = avio_get_str16le(pb, name_len, name, sizeof(name))) < name_len)
704 avio_skip(pb, name_len - ret);
705 av_log(s, AV_LOG_TRACE, "%d stream %d name_len %2d type %d len %4d <%s>\n",
706 i, stream_num, name_len, value_type, value_len, name);
708 if (!strcmp(name, "AspectRatioX")){
709 int aspect_x = get_value(s->pb, value_type, 16);
711 asf->dar[stream_num].num = aspect_x;
712 } else if(!strcmp(name, "AspectRatioY")){
713 int aspect_y = get_value(s->pb, value_type, 16);
715 asf->dar[stream_num].den = aspect_y;
717 get_tag(s, name, value_type, value_len, 16);
724 static int asf_read_marker(AVFormatContext *s, int64_t size)
726 AVIOContext *pb = s->pb;
727 ASFContext *asf = s->priv_data;
728 int i, count, name_len, ret;
731 avio_rl64(pb); // reserved 16 bytes
732 avio_rl64(pb); // ...
733 count = avio_rl32(pb); // markers count
734 avio_rl16(pb); // reserved 2 bytes
735 name_len = avio_rl16(pb); // name length
736 for (i = 0; i < name_len; i++)
737 avio_r8(pb); // skip the name
739 for (i = 0; i < count; i++) {
743 avio_rl64(pb); // offset, 8 bytes
744 pres_time = avio_rl64(pb); // presentation time
745 pres_time -= asf->hdr.preroll * 10000;
746 avio_rl16(pb); // entry length
747 avio_rl32(pb); // send time
748 avio_rl32(pb); // flags
749 name_len = avio_rl32(pb); // name length
750 if ((ret = avio_get_str16le(pb, name_len * 2, name,
751 sizeof(name))) < name_len)
752 avio_skip(pb, name_len - ret);
753 avpriv_new_chapter(s, i, (AVRational) { 1, 10000000 }, pres_time,
754 AV_NOPTS_VALUE, name);
760 static int asf_read_header(AVFormatContext *s)
762 ASFContext *asf = s->priv_data;
764 AVIOContext *pb = s->pb;
769 if (ff_guidcmp(&g, &ff_asf_header))
770 return AVERROR_INVALIDDATA;
775 memset(&asf->asfid2avid, -1, sizeof(asf->asfid2avid));
777 for (i = 0; i<128; i++)
778 asf->streams[i].stream_language_index = 128; // invalid stream index means no language info
781 uint64_t gpos = avio_tell(pb);
783 gsize = avio_rl64(pb);
785 if (!ff_guidcmp(&g, &ff_asf_data_header)) {
786 asf->data_object_offset = avio_tell(pb);
787 /* If not streaming, gsize is not unlimited (how?),
788 * and there is enough space in the file.. */
789 if (!(asf->hdr.flags & 0x01) && gsize >= 100)
790 asf->data_object_size = gsize - 24;
792 asf->data_object_size = (uint64_t)-1;
796 return AVERROR_INVALIDDATA;
797 if (!ff_guidcmp(&g, &ff_asf_file_header)) {
798 int ret = asf_read_file_properties(s, gsize);
801 } else if (!ff_guidcmp(&g, &ff_asf_stream_header)) {
802 int ret = asf_read_stream_properties(s, gsize);
805 } else if (!ff_guidcmp(&g, &ff_asf_comment_header)) {
806 asf_read_content_desc(s, gsize);
807 } else if (!ff_guidcmp(&g, &ff_asf_language_guid)) {
808 asf_read_language_list(s, gsize);
809 } else if (!ff_guidcmp(&g, &ff_asf_extended_content_header)) {
810 asf_read_ext_content_desc(s, gsize);
811 } else if (!ff_guidcmp(&g, &ff_asf_metadata_header)) {
812 asf_read_metadata(s, gsize);
813 } else if (!ff_guidcmp(&g, &ff_asf_metadata_library_header)) {
814 asf_read_metadata(s, gsize);
815 } else if (!ff_guidcmp(&g, &ff_asf_ext_stream_header)) {
816 asf_read_ext_stream_properties(s, gsize);
818 // there could be a optional stream properties object to follow
819 // if so the next iteration will pick it up
821 } else if (!ff_guidcmp(&g, &ff_asf_head1_guid)) {
825 } else if (!ff_guidcmp(&g, &ff_asf_marker_header)) {
826 asf_read_marker(s, gsize);
827 } else if (avio_feof(pb)) {
831 if (!ff_guidcmp(&g, &ff_asf_content_encryption)) {
835 av_log(s, AV_LOG_WARNING,
836 "DRM protected stream detected, decoding will likely fail!\n");
838 av_log(s, AV_LOG_DEBUG, "Secret data:\n");
840 if ((ret = av_get_packet(pb, &pkt, len)) < 0)
842 av_hex_dump_log(s, AV_LOG_DEBUG, pkt.data, pkt.size);
843 av_free_packet(&pkt);
845 get_tag(s, "ASF_Protection_Type", -1, len, 32);
847 get_tag(s, "ASF_Key_ID", -1, len, 32);
849 get_tag(s, "ASF_License_URL", -1, len, 32);
850 } else if (!ff_guidcmp(&g, &ff_asf_ext_content_encryption)) {
851 av_log(s, AV_LOG_WARNING,
852 "Ext DRM protected stream detected, decoding will likely fail!\n");
853 av_dict_set(&s->metadata, "encryption", "ASF Extended Content Encryption", 0);
854 } else if (!ff_guidcmp(&g, &ff_asf_digital_signature)) {
855 av_log(s, AV_LOG_INFO, "Digital signature detected!\n");
859 if (avio_tell(pb) != gpos + gsize)
860 av_log(s, AV_LOG_DEBUG,
861 "gpos mismatch our pos=%"PRIu64", end=%"PRId64"\n",
862 avio_tell(pb) - gpos, gsize);
863 avio_seek(pb, gpos + gsize, SEEK_SET);
871 asf->data_offset = avio_tell(pb);
872 asf->packet_size_left = 0;
874 for (i = 0; i < 128; i++) {
875 int stream_num = asf->asfid2avid[i];
876 if (stream_num >= 0) {
877 AVStream *st = s->streams[stream_num];
878 if (!st->codec->bit_rate)
879 st->codec->bit_rate = asf->stream_bitrates[i];
880 if (asf->dar[i].num > 0 && asf->dar[i].den > 0) {
881 av_reduce(&st->sample_aspect_ratio.num,
882 &st->sample_aspect_ratio.den,
883 asf->dar[i].num, asf->dar[i].den, INT_MAX);
884 } else if ((asf->dar[0].num > 0) && (asf->dar[0].den > 0) &&
885 // Use ASF container value if the stream doesn't set AR.
886 (st->codec->codec_type == AVMEDIA_TYPE_VIDEO))
887 av_reduce(&st->sample_aspect_ratio.num,
888 &st->sample_aspect_ratio.den,
889 asf->dar[0].num, asf->dar[0].den, INT_MAX);
891 av_log(s, AV_LOG_TRACE, "i=%d, st->codec->codec_type:%d, asf->dar %d:%d sar=%d:%d\n",
892 i, st->codec->codec_type, asf->dar[i].num, asf->dar[i].den,
893 st->sample_aspect_ratio.num, st->sample_aspect_ratio.den);
895 // copy and convert language codes to the frontend
896 if (asf->streams[i].stream_language_index < 128) {
897 const char *rfc1766 = asf->stream_languages[asf->streams[i].stream_language_index];
898 if (rfc1766 && strlen(rfc1766) > 1) {
899 const char primary_tag[3] = { rfc1766[0], rfc1766[1], '\0' }; // ignore country code if any
900 const char *iso6392 = av_convert_lang_to(primary_tag,
901 AV_LANG_ISO639_2_BIBL);
903 av_dict_set(&st->metadata, "language", iso6392, 0);
909 ff_metadata_conv(&s->metadata, NULL, ff_asf_metadata_conv);
914 #define DO_2BITS(bits, var, defval) \
915 switch (bits & 3) { \
917 var = avio_rl32(pb); \
921 var = avio_rl16(pb); \
934 * Load a single ASF packet into the demuxer.
935 * @param s demux context
936 * @param pb context to read data from
937 * @return 0 on success, <0 on error
939 static int asf_get_packet(AVFormatContext *s, AVIOContext *pb)
941 ASFContext *asf = s->priv_data;
942 uint32_t packet_length, padsize;
946 // if we do not know packet size, allow skipping up to 32 kB
948 if (asf->no_resync_search)
950 else if (s->packet_size > 0)
951 off = (avio_tell(pb) - s->internal->data_offset) % s->packet_size + 3;
958 if (c == 0x82 && !d && !e)
963 /* This code allows handling of -EAGAIN at packet boundaries (i.e.
964 * if the packet sync code above triggers -EAGAIN). This does not
965 * imply complete -EAGAIN handling support at random positions in
967 if (pb->error == AVERROR(EAGAIN))
968 return AVERROR(EAGAIN);
970 av_log(s, AV_LOG_ERROR,
971 "ff asf bad header %x at:%"PRId64"\n", c, avio_tell(pb));
973 if ((c & 0x8f) == 0x82) {
976 av_log(s, AV_LOG_ERROR, "ff asf bad non zero\n");
977 return AVERROR_INVALIDDATA;
982 } else if(!avio_feof(pb)) {
983 avio_seek(pb, -1, SEEK_CUR); // FIXME
986 asf->packet_flags = c;
987 asf->packet_property = d;
989 DO_2BITS(asf->packet_flags >> 5, packet_length, s->packet_size);
990 DO_2BITS(asf->packet_flags >> 1, padsize, 0); // sequence ignored
991 DO_2BITS(asf->packet_flags >> 3, padsize, 0); // padding length
993 // the following checks prevent overflows and infinite loops
994 if (!packet_length || packet_length >= (1U << 29)) {
995 av_log(s, AV_LOG_ERROR,
996 "invalid packet_length %"PRIu32" at:%"PRId64"\n",
997 packet_length, avio_tell(pb));
998 return AVERROR_INVALIDDATA;
1000 if (padsize >= packet_length) {
1001 av_log(s, AV_LOG_ERROR,
1002 "invalid padsize %"PRIu32" at:%"PRId64"\n", padsize, avio_tell(pb));
1003 return AVERROR_INVALIDDATA;
1006 asf->packet_timestamp = avio_rl32(pb);
1007 avio_rl16(pb); /* duration */
1008 // rsize has at least 11 bytes which have to be present
1010 if (asf->packet_flags & 0x01) {
1011 asf->packet_segsizetype = avio_r8(pb);
1013 asf->packet_segments = asf->packet_segsizetype & 0x3f;
1015 asf->packet_segments = 1;
1016 asf->packet_segsizetype = 0x80;
1018 if (rsize > packet_length - padsize) {
1019 asf->packet_size_left = 0;
1020 av_log(s, AV_LOG_ERROR,
1021 "invalid packet header length %d for pktlen %"PRIu32"-%"PRIu32" at %"PRId64"\n",
1022 rsize, packet_length, padsize, avio_tell(pb));
1023 return AVERROR_INVALIDDATA;
1025 asf->packet_size_left = packet_length - padsize - rsize;
1026 if (packet_length < asf->hdr.min_pktsize)
1027 padsize += asf->hdr.min_pktsize - packet_length;
1028 asf->packet_padsize = padsize;
1029 av_log(s, AV_LOG_TRACE, "packet: size=%d padsize=%d left=%d\n",
1030 s->packet_size, asf->packet_padsize, asf->packet_size_left);
1036 * @return <0 if error
1038 static int asf_read_frame_header(AVFormatContext *s, AVIOContext *pb)
1040 ASFContext *asf = s->priv_data;
1043 int num = avio_r8(pb);
1045 int64_t ts0, ts1 av_unused;
1047 asf->packet_segments--;
1048 asf->packet_key_frame = num >> 7;
1049 asf->stream_index = asf->asfid2avid[num & 0x7f];
1050 asfst = &asf->streams[num & 0x7f];
1051 // sequence should be ignored!
1052 DO_2BITS(asf->packet_property >> 4, asf->packet_seq, 0);
1053 DO_2BITS(asf->packet_property >> 2, asf->packet_frag_offset, 0);
1054 DO_2BITS(asf->packet_property, asf->packet_replic_size, 0);
1055 av_log(asf, AV_LOG_TRACE, "key:%d stream:%d seq:%d offset:%d replic_size:%d\n",
1056 asf->packet_key_frame, asf->stream_index, asf->packet_seq,
1057 asf->packet_frag_offset, asf->packet_replic_size);
1058 if (rsize+(int64_t)asf->packet_replic_size > asf->packet_size_left) {
1059 av_log(s, AV_LOG_ERROR, "packet_replic_size %d is invalid\n", asf->packet_replic_size);
1060 return AVERROR_INVALIDDATA;
1062 if (asf->packet_replic_size >= 8) {
1063 int64_t end = avio_tell(pb) + asf->packet_replic_size;
1065 asfst->packet_obj_size = avio_rl32(pb);
1066 if (asfst->packet_obj_size >= (1 << 24) || asfst->packet_obj_size < 0) {
1067 av_log(s, AV_LOG_ERROR, "packet_obj_size %d invalid\n", asfst->packet_obj_size);
1068 asfst->packet_obj_size = 0;
1069 return AVERROR_INVALIDDATA;
1071 asf->packet_frag_timestamp = avio_rl32(pb); // timestamp
1073 for (i = 0; i < asfst->payload_ext_ct; i++) {
1074 ASFPayload *p = &asfst->payload[i];
1078 size = avio_rl16(pb);
1079 payend = avio_tell(pb) + size;
1081 av_log(s, AV_LOG_ERROR, "too long payload\n");
1086 // duration = avio_rl16(pb);
1089 aspect.num = avio_r8(pb);
1090 aspect.den = avio_r8(pb);
1091 if (aspect.num > 0 && aspect.den > 0 && asf->stream_index >= 0) {
1092 s->streams[asf->stream_index]->sample_aspect_ratio = aspect;
1097 ts0 = avio_rl64(pb);
1098 ts1 = avio_rl64(pb);
1099 if (ts0!= -1) asf->packet_frag_timestamp = ts0/10000;
1100 else asf->packet_frag_timestamp = AV_NOPTS_VALUE;
1111 avio_seek(pb, payend, SEEK_SET);
1114 avio_seek(pb, end, SEEK_SET);
1115 rsize += asf->packet_replic_size; // FIXME - check validity
1116 } else if (asf->packet_replic_size == 1) {
1117 // multipacket - frag_offset is beginning timestamp
1118 asf->packet_time_start = asf->packet_frag_offset;
1119 asf->packet_frag_offset = 0;
1120 asf->packet_frag_timestamp = asf->packet_timestamp;
1122 asf->packet_time_delta = avio_r8(pb);
1124 } else if (asf->packet_replic_size != 0) {
1125 av_log(s, AV_LOG_ERROR, "unexpected packet_replic_size of %d\n",
1126 asf->packet_replic_size);
1127 return AVERROR_INVALIDDATA;
1129 if (asf->packet_flags & 0x01) {
1130 DO_2BITS(asf->packet_segsizetype >> 6, asf->packet_frag_size, 0); // 0 is illegal
1131 if (rsize > asf->packet_size_left) {
1132 av_log(s, AV_LOG_ERROR, "packet_replic_size is invalid\n");
1133 return AVERROR_INVALIDDATA;
1134 } else if (asf->packet_frag_size > asf->packet_size_left - rsize) {
1135 if (asf->packet_frag_size > asf->packet_size_left - rsize + asf->packet_padsize) {
1136 av_log(s, AV_LOG_ERROR, "packet_frag_size is invalid (%d-%d)\n",
1137 asf->packet_size_left, rsize);
1138 return AVERROR_INVALIDDATA;
1140 int diff = asf->packet_frag_size - (asf->packet_size_left - rsize);
1141 asf->packet_size_left += diff;
1142 asf->packet_padsize -= diff;
1146 asf->packet_frag_size = asf->packet_size_left - rsize;
1148 if (asf->packet_replic_size == 1) {
1149 asf->packet_multi_size = asf->packet_frag_size;
1150 if (asf->packet_multi_size > asf->packet_size_left)
1151 return AVERROR_INVALIDDATA;
1153 asf->packet_size_left -= rsize;
1159 * Parse data from individual ASF packets (which were previously loaded
1160 * with asf_get_packet()).
1161 * @param s demux context
1162 * @param pb context to read data from
1163 * @param pkt pointer to store packet data into
1164 * @return 0 if data was stored in pkt, <0 on error or 1 if more ASF
1165 * packets need to be loaded (through asf_get_packet())
1167 static int asf_parse_packet(AVFormatContext *s, AVIOContext *pb, AVPacket *pkt)
1169 ASFContext *asf = s->priv_data;
1170 ASFStream *asf_st = 0;
1175 if (asf->packet_size_left < FRAME_HEADER_SIZE ||
1176 asf->packet_segments < 1 && asf->packet_time_start == 0) {
1177 int ret = asf->packet_size_left + asf->packet_padsize;
1179 if (asf->packet_size_left && asf->packet_size_left < FRAME_HEADER_SIZE)
1180 av_log(s, AV_LOG_WARNING, "Skip due to FRAME_HEADER_SIZE\n");
1186 asf->packet_pos = avio_tell(pb);
1187 if (asf->data_object_size != (uint64_t)-1 &&
1188 (asf->packet_pos - asf->data_object_offset >= asf->data_object_size))
1189 return AVERROR_EOF; /* Do not exceed the size of the data object */
1192 if (asf->packet_time_start == 0) {
1193 if (asf_read_frame_header(s, pb) < 0) {
1194 asf->packet_time_start = asf->packet_segments = 0;
1197 if (asf->stream_index < 0 ||
1198 s->streams[asf->stream_index]->discard >= AVDISCARD_ALL ||
1199 (!asf->packet_key_frame &&
1200 (s->streams[asf->stream_index]->discard >= AVDISCARD_NONKEY || asf->streams[s->streams[asf->stream_index]->id].skip_to_key))) {
1201 asf->packet_time_start = 0;
1202 /* unhandled packet (should not happen) */
1203 avio_skip(pb, asf->packet_frag_size);
1204 asf->packet_size_left -= asf->packet_frag_size;
1205 if (asf->stream_index < 0)
1206 av_log(s, AV_LOG_ERROR, "ff asf skip %d (unknown stream)\n",
1207 asf->packet_frag_size);
1210 asf->asf_st = &asf->streams[s->streams[asf->stream_index]->id];
1211 asf->asf_st->skip_to_key = 0;
1213 asf_st = asf->asf_st;
1216 if (!asf_st->frag_offset && asf->packet_frag_offset) {
1217 av_log(s, AV_LOG_TRACE, "skipping asf data pkt with fragment offset for "
1218 "stream:%d, expected:%d but got %d from pkt)\n",
1219 asf->stream_index, asf_st->frag_offset,
1220 asf->packet_frag_offset);
1221 avio_skip(pb, asf->packet_frag_size);
1222 asf->packet_size_left -= asf->packet_frag_size;
1226 if (asf->packet_replic_size == 1) {
1227 // frag_offset is here used as the beginning timestamp
1228 asf->packet_frag_timestamp = asf->packet_time_start;
1229 asf->packet_time_start += asf->packet_time_delta;
1230 asf_st->packet_obj_size = asf->packet_frag_size = avio_r8(pb);
1231 asf->packet_size_left--;
1232 asf->packet_multi_size--;
1233 if (asf->packet_multi_size < asf_st->packet_obj_size) {
1234 asf->packet_time_start = 0;
1235 avio_skip(pb, asf->packet_multi_size);
1236 asf->packet_size_left -= asf->packet_multi_size;
1239 asf->packet_multi_size -= asf_st->packet_obj_size;
1242 if (asf_st->pkt.size != asf_st->packet_obj_size ||
1243 // FIXME is this condition sufficient?
1244 asf_st->frag_offset + asf->packet_frag_size > asf_st->pkt.size) {
1247 if (asf_st->pkt.data) {
1248 av_log(s, AV_LOG_INFO,
1249 "freeing incomplete packet size %d, new %d\n",
1250 asf_st->pkt.size, asf_st->packet_obj_size);
1251 asf_st->frag_offset = 0;
1252 av_free_packet(&asf_st->pkt);
1255 if ((ret = av_new_packet(&asf_st->pkt, asf_st->packet_obj_size)) < 0)
1257 asf_st->seq = asf->packet_seq;
1258 if (asf->ts_is_pts) {
1259 asf_st->pkt.pts = asf->packet_frag_timestamp - asf->hdr.preroll;
1261 asf_st->pkt.dts = asf->packet_frag_timestamp - asf->hdr.preroll;
1262 asf_st->pkt.stream_index = asf->stream_index;
1263 asf_st->pkt.pos = asf_st->packet_pos = asf->packet_pos;
1264 asf_st->pkt_clean = 0;
1266 if (asf_st->pkt.data && asf_st->palette_changed) {
1268 pal = av_packet_new_side_data(&asf_st->pkt, AV_PKT_DATA_PALETTE,
1271 av_log(s, AV_LOG_ERROR, "Cannot append palette to packet\n");
1273 memcpy(pal, asf_st->palette, AVPALETTE_SIZE);
1274 asf_st->palette_changed = 0;
1277 av_log(asf, AV_LOG_TRACE, "new packet: stream:%d key:%d packet_key:%d audio:%d size:%d\n",
1278 asf->stream_index, asf->packet_key_frame,
1279 asf_st->pkt.flags & AV_PKT_FLAG_KEY,
1280 s->streams[asf->stream_index]->codec->codec_type == AVMEDIA_TYPE_AUDIO,
1281 asf_st->packet_obj_size);
1282 if (s->streams[asf->stream_index]->codec->codec_type == AVMEDIA_TYPE_AUDIO)
1283 asf->packet_key_frame = 1;
1284 if (asf->packet_key_frame)
1285 asf_st->pkt.flags |= AV_PKT_FLAG_KEY;
1289 av_log(asf, AV_LOG_TRACE, "READ PACKET s:%d os:%d o:%d,%d l:%d DATA:%p\n",
1290 s->packet_size, asf_st->pkt.size, asf->packet_frag_offset,
1291 asf_st->frag_offset, asf->packet_frag_size, asf_st->pkt.data);
1292 asf->packet_size_left -= asf->packet_frag_size;
1293 if (asf->packet_size_left < 0)
1296 if (asf->packet_frag_offset >= asf_st->pkt.size ||
1297 asf->packet_frag_size > asf_st->pkt.size - asf->packet_frag_offset) {
1298 av_log(s, AV_LOG_ERROR,
1299 "packet fragment position invalid %u,%u not in %u\n",
1300 asf->packet_frag_offset, asf->packet_frag_size,
1305 if (asf->packet_frag_offset != asf_st->frag_offset && !asf_st->pkt_clean) {
1306 memset(asf_st->pkt.data + asf_st->frag_offset, 0, asf_st->pkt.size - asf_st->frag_offset);
1307 asf_st->pkt_clean = 1;
1310 ret = avio_read(pb, asf_st->pkt.data + asf->packet_frag_offset,
1311 asf->packet_frag_size);
1312 if (ret != asf->packet_frag_size) {
1313 if (ret < 0 || asf->packet_frag_offset + ret == 0)
1314 return ret < 0 ? ret : AVERROR_EOF;
1316 if (asf_st->ds_span > 1) {
1317 // scrambling, we can either drop it completely or fill the remainder
1318 // TODO: should we fill the whole packet instead of just the current
1320 memset(asf_st->pkt.data + asf->packet_frag_offset + ret, 0,
1321 asf->packet_frag_size - ret);
1322 ret = asf->packet_frag_size;
1324 // no scrambling, so we can return partial packets
1325 av_shrink_packet(&asf_st->pkt, asf->packet_frag_offset + ret);
1328 if (s->key && s->keylen == 20)
1329 ff_asfcrypt_dec(s->key, asf_st->pkt.data + asf->packet_frag_offset,
1331 asf_st->frag_offset += ret;
1332 /* test if whole packet is read */
1333 if (asf_st->frag_offset == asf_st->pkt.size) {
1334 // workaround for macroshit radio DVR-MS files
1335 if (s->streams[asf->stream_index]->codec->codec_id == AV_CODEC_ID_MPEG2VIDEO &&
1336 asf_st->pkt.size > 100) {
1338 for (i = 0; i < asf_st->pkt.size && !asf_st->pkt.data[i]; i++)
1340 if (i == asf_st->pkt.size) {
1341 av_log(s, AV_LOG_DEBUG, "discarding ms fart\n");
1342 asf_st->frag_offset = 0;
1343 av_free_packet(&asf_st->pkt);
1349 if (asf_st->ds_span > 1) {
1350 if (asf_st->pkt.size != asf_st->ds_packet_size * asf_st->ds_span) {
1351 av_log(s, AV_LOG_ERROR,
1352 "pkt.size != ds_packet_size * ds_span (%d %d %d)\n",
1353 asf_st->pkt.size, asf_st->ds_packet_size,
1356 /* packet descrambling */
1357 AVBufferRef *buf = av_buffer_alloc(asf_st->pkt.size +
1358 FF_INPUT_BUFFER_PADDING_SIZE);
1360 uint8_t *newdata = buf->data;
1362 memset(newdata + asf_st->pkt.size, 0,
1363 FF_INPUT_BUFFER_PADDING_SIZE);
1364 while (offset < asf_st->pkt.size) {
1365 int off = offset / asf_st->ds_chunk_size;
1366 int row = off / asf_st->ds_span;
1367 int col = off % asf_st->ds_span;
1368 int idx = row + col * asf_st->ds_packet_size / asf_st->ds_chunk_size;
1369 assert(offset + asf_st->ds_chunk_size <= asf_st->pkt.size);
1370 assert(idx + 1 <= asf_st->pkt.size / asf_st->ds_chunk_size);
1371 memcpy(newdata + offset,
1372 asf_st->pkt.data + idx * asf_st->ds_chunk_size,
1373 asf_st->ds_chunk_size);
1374 offset += asf_st->ds_chunk_size;
1376 av_buffer_unref(&asf_st->pkt.buf);
1377 asf_st->pkt.buf = buf;
1378 asf_st->pkt.data = buf->data;
1382 asf_st->frag_offset = 0;
1384 #if FF_API_DESTRUCT_PACKET
1385 FF_DISABLE_DEPRECATION_WARNINGS
1386 asf_st->pkt.destruct = NULL;
1387 FF_ENABLE_DEPRECATION_WARNINGS
1389 asf_st->pkt.buf = 0;
1390 asf_st->pkt.size = 0;
1391 asf_st->pkt.data = 0;
1392 asf_st->pkt.side_data_elems = 0;
1393 asf_st->pkt.side_data = NULL;
1394 break; // packet completed
1400 static int asf_read_packet(AVFormatContext *s, AVPacket *pkt)
1402 ASFContext *asf = s->priv_data;
1407 /* parse cached packets, if any */
1408 if ((ret = asf_parse_packet(s, s->pb, pkt)) <= 0)
1410 if ((ret = asf_get_packet(s, s->pb)) < 0)
1411 assert(asf->packet_size_left < FRAME_HEADER_SIZE ||
1412 asf->packet_segments < 1);
1413 asf->packet_time_start = 0;
1417 // Added to support seeking after packets have been read
1418 // If information is not reset, read_packet fails due to
1419 // leftover information from previous reads
1420 static void asf_reset_header(AVFormatContext *s)
1422 ASFContext *asf = s->priv_data;
1426 asf->packet_size_left = 0;
1427 asf->packet_flags = 0;
1428 asf->packet_property = 0;
1429 asf->packet_timestamp = 0;
1430 asf->packet_segsizetype = 0;
1431 asf->packet_segments = 0;
1432 asf->packet_seq = 0;
1433 asf->packet_replic_size = 0;
1434 asf->packet_key_frame = 0;
1435 asf->packet_padsize = 0;
1436 asf->packet_frag_offset = 0;
1437 asf->packet_frag_size = 0;
1438 asf->packet_frag_timestamp = 0;
1439 asf->packet_multi_size = 0;
1440 asf->packet_time_delta = 0;
1441 asf->packet_time_start = 0;
1443 for (i = 0; i < 128; i++) {
1444 asf_st = &asf->streams[i];
1445 av_free_packet(&asf_st->pkt);
1446 asf_st->packet_obj_size = 0;
1447 asf_st->frag_offset = 0;
1453 static void skip_to_key(AVFormatContext *s)
1455 ASFContext *asf = s->priv_data;
1458 for (i = 0; i < 128; i++) {
1459 int j = asf->asfid2avid[i];
1460 ASFStream *asf_st = &asf->streams[i];
1461 if (j < 0 || s->streams[j]->codec->codec_type != AVMEDIA_TYPE_VIDEO)
1464 asf_st->skip_to_key = 1;
1468 static int asf_read_close(AVFormatContext *s)
1470 asf_reset_header(s);
1475 static int64_t asf_read_pts(AVFormatContext *s, int stream_index,
1476 int64_t *ppos, int64_t pos_limit)
1478 ASFContext *asf = s->priv_data;
1479 AVPacket pkt1, *pkt = &pkt1;
1482 int64_t pos = *ppos;
1484 int64_t start_pos[ASF_MAX_STREAMS];
1486 for (i = 0; i < s->nb_streams; i++)
1489 if (s->packet_size > 0)
1490 pos = (pos + s->packet_size - 1 - s->internal->data_offset) /
1491 s->packet_size * s->packet_size +
1492 s->internal->data_offset;
1494 if (avio_seek(s->pb, pos, SEEK_SET) < 0)
1495 return AV_NOPTS_VALUE;
1497 ff_read_frame_flush(s);
1498 asf_reset_header(s);
1500 if (av_read_frame(s, pkt) < 0) {
1501 av_log(s, AV_LOG_INFO, "asf_read_pts failed\n");
1502 return AV_NOPTS_VALUE;
1507 av_free_packet(pkt);
1508 if (pkt->flags & AV_PKT_FLAG_KEY) {
1509 i = pkt->stream_index;
1511 asf_st = &asf->streams[s->streams[i]->id];
1513 // assert((asf_st->packet_pos - s->data_offset) % s->packet_size == 0);
1514 pos = asf_st->packet_pos;
1516 av_add_index_entry(s->streams[i], pos, pts, pkt->size,
1517 pos - start_pos[i] + 1, AVINDEX_KEYFRAME);
1518 start_pos[i] = asf_st->packet_pos + 1;
1520 if (pkt->stream_index == stream_index)
1529 static int asf_build_simple_index(AVFormatContext *s, int stream_index)
1532 ASFContext *asf = s->priv_data;
1533 int64_t current_pos = avio_tell(s->pb);
1536 if((ret = avio_seek(s->pb, asf->data_object_offset + asf->data_object_size, SEEK_SET)) < 0) {
1540 if ((ret = ff_get_guid(s->pb, &g)) < 0)
1543 /* the data object can be followed by other top-level objects,
1544 * skip them until the simple index object is reached */
1545 while (ff_guidcmp(&g, &ff_asf_simple_index_header)) {
1546 int64_t gsize = avio_rl64(s->pb);
1547 if (gsize < 24 || avio_feof(s->pb)) {
1550 avio_skip(s->pb, gsize - 24);
1551 if ((ret = ff_get_guid(s->pb, &g)) < 0)
1556 int64_t itime, last_pos = -1;
1559 int64_t av_unused gsize = avio_rl64(s->pb);
1560 if ((ret = ff_get_guid(s->pb, &g)) < 0)
1562 itime = avio_rl64(s->pb);
1563 pct = avio_rl32(s->pb);
1564 ict = avio_rl32(s->pb);
1565 av_log(s, AV_LOG_DEBUG,
1566 "itime:0x%"PRIx64", pct:%d, ict:%d\n", itime, pct, ict);
1568 for (i = 0; i < ict; i++) {
1569 int pktnum = avio_rl32(s->pb);
1570 int pktct = avio_rl16(s->pb);
1571 int64_t pos = s->internal->data_offset + s->packet_size * (int64_t)pktnum;
1572 int64_t index_pts = FFMAX(av_rescale(itime, i, 10000) - asf->hdr.preroll, 0);
1574 if (pos != last_pos) {
1575 av_log(s, AV_LOG_DEBUG, "pktnum:%d, pktct:%d pts: %"PRId64"\n",
1576 pktnum, pktct, index_pts);
1577 av_add_index_entry(s->streams[stream_index], pos, index_pts,
1578 s->packet_size, 0, AVINDEX_KEYFRAME);
1582 asf->index_read = ict > 1;
1585 // if (avio_feof(s->pb)) {
1588 avio_seek(s->pb, current_pos, SEEK_SET);
1592 static int asf_read_seek(AVFormatContext *s, int stream_index,
1593 int64_t pts, int flags)
1595 ASFContext *asf = s->priv_data;
1596 AVStream *st = s->streams[stream_index];
1599 if (s->packet_size <= 0)
1602 /* Try using the protocol's read_seek if available */
1604 int64_t ret = avio_seek_time(s->pb, stream_index, pts, flags);
1606 asf_reset_header(s);
1607 if (ret != AVERROR(ENOSYS))
1611 /* explicitly handle the case of seeking to 0 */
1613 asf_reset_header(s);
1614 avio_seek(s->pb, s->internal->data_offset, SEEK_SET);
1618 if (!asf->index_read) {
1619 ret = asf_build_simple_index(s, stream_index);
1621 asf->index_read = -1;
1624 if (asf->index_read > 0 && st->index_entries) {
1625 int index = av_index_search_timestamp(st, pts, flags);
1627 /* find the position */
1628 uint64_t pos = st->index_entries[index].pos;
1631 av_log(s, AV_LOG_DEBUG, "SEEKTO: %"PRId64"\n", pos);
1632 if(avio_seek(s->pb, pos, SEEK_SET) < 0)
1634 asf_reset_header(s);
1639 /* no index or seeking by index failed */
1640 if (ff_seek_frame_binary(s, stream_index, pts, flags) < 0)
1642 asf_reset_header(s);
1647 AVInputFormat ff_asf_demuxer = {
1649 .long_name = NULL_IF_CONFIG_SMALL("ASF (Advanced / Active Streaming Format)"),
1650 .priv_data_size = sizeof(ASFContext),
1651 .read_probe = asf_probe,
1652 .read_header = asf_read_header,
1653 .read_packet = asf_read_packet,
1654 .read_close = asf_read_close,
1655 .read_seek = asf_read_seek,
1656 .read_timestamp = asf_read_pts,
1657 .flags = AVFMT_NOBINSEARCH | AVFMT_NOGENSEARCH,
1658 .priv_class = &asf_class,