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/common.h"
25 #include "libavutil/avstring.h"
26 #include "libavcodec/mpegaudio.h"
28 #include "avio_internal.h"
32 #include "avlanguage.h"
35 int asfid2avid[128]; ///< conversion table from asf ID 2 AVStream ID
36 ASFStream streams[128]; ///< it's max number and it's not that big
37 uint32_t stream_bitrates[128]; ///< max number of streams, bitrate for each (for streaming)
39 char stream_languages[128][6]; ///< max number of streams, language for each (RFC1766, e.g. en-US)
40 /* non streamed additonnal info */
43 /* only for reading */
44 uint64_t data_offset; ///< beginning of the first data packet
45 uint64_t data_object_offset; ///< data object offset (excl. GUID & size)
46 uint64_t data_object_size; ///< size of the data object
54 int packet_segsizetype;
57 int packet_replic_size;
60 unsigned int packet_frag_offset;
61 unsigned int packet_frag_size;
62 int64_t packet_frag_timestamp;
63 int packet_multi_size;
65 int packet_time_delta;
66 int packet_time_start;
71 ASFStream* asf_st; ///< currently decoded stream
77 #define ASF_MAX_STREAMS 127
78 #define FRAME_HEADER_SIZE 17
79 // Fix Me! FRAME_HEADER_SIZE may be different.
81 static const ff_asf_guid index_guid = {
82 0x90, 0x08, 0x00, 0x33, 0xb1, 0xe5, 0xcf, 0x11, 0x89, 0xf4, 0x00, 0xa0, 0xc9, 0x03, 0x49, 0xcb
85 static const ff_asf_guid stream_bitrate_guid = { /* (http://get.to/sdp) */
86 0xce, 0x75, 0xf8, 0x7b, 0x8d, 0x46, 0xd1, 0x11, 0x8d, 0x82, 0x00, 0x60, 0x97, 0xc9, 0xa2, 0xb2
88 /**********************************/
92 #define PRINT_IF_GUID(g,cmp) \
93 if (!ff_guidcmp(g, &cmp)) \
94 av_dlog(NULL, "(GUID: %s) ", #cmp)
96 static void print_guid(const ff_asf_guid *g)
99 PRINT_IF_GUID(g, ff_asf_header);
100 else PRINT_IF_GUID(g, ff_asf_file_header);
101 else PRINT_IF_GUID(g, ff_asf_stream_header);
102 else PRINT_IF_GUID(g, ff_asf_audio_stream);
103 else PRINT_IF_GUID(g, ff_asf_audio_conceal_none);
104 else PRINT_IF_GUID(g, ff_asf_video_stream);
105 else PRINT_IF_GUID(g, ff_asf_video_conceal_none);
106 else PRINT_IF_GUID(g, ff_asf_command_stream);
107 else PRINT_IF_GUID(g, ff_asf_comment_header);
108 else PRINT_IF_GUID(g, ff_asf_codec_comment_header);
109 else PRINT_IF_GUID(g, ff_asf_codec_comment1_header);
110 else PRINT_IF_GUID(g, ff_asf_data_header);
111 else PRINT_IF_GUID(g, index_guid);
112 else PRINT_IF_GUID(g, ff_asf_head1_guid);
113 else PRINT_IF_GUID(g, ff_asf_head2_guid);
114 else PRINT_IF_GUID(g, ff_asf_my_guid);
115 else PRINT_IF_GUID(g, ff_asf_ext_stream_header);
116 else PRINT_IF_GUID(g, ff_asf_extended_content_header);
117 else PRINT_IF_GUID(g, ff_asf_ext_stream_embed_stream_header);
118 else PRINT_IF_GUID(g, ff_asf_ext_stream_audio_stream);
119 else PRINT_IF_GUID(g, ff_asf_metadata_header);
120 else PRINT_IF_GUID(g, ff_asf_marker_header);
121 else PRINT_IF_GUID(g, stream_bitrate_guid);
122 else PRINT_IF_GUID(g, ff_asf_language_guid);
124 av_dlog(NULL, "(GUID: unknown) ");
126 av_dlog(NULL, " 0x%02x,", (*g)[i]);
127 av_dlog(NULL, "}\n");
131 #define print_guid(g)
134 static int asf_probe(AVProbeData *pd)
136 /* check file header */
137 if (!ff_guidcmp(pd->buf, &ff_asf_header))
138 return AVPROBE_SCORE_MAX;
143 static int get_value(AVIOContext *pb, int type){
145 case 2: return avio_rl32(pb);
146 case 3: return avio_rl32(pb);
147 case 4: return avio_rl64(pb);
148 case 5: return avio_rl16(pb);
149 default:return INT_MIN;
153 static void get_tag(AVFormatContext *s, const char *key, int type, int len)
156 int64_t off = avio_tell(s->pb);
158 if ((unsigned)len >= (UINT_MAX - 1)/2)
161 value = av_malloc(2*len+1);
165 if (type == 0) { // UTF16-LE
166 avio_get_str16le(s->pb, len, value, 2*len + 1);
167 } else if (type > 1 && type <= 5) { // boolean or DWORD or QWORD or WORD
168 uint64_t num = get_value(s->pb, type);
169 snprintf(value, len, "%"PRIu64, num);
171 av_log(s, AV_LOG_DEBUG, "Unsupported value type %d in tag %s.\n", type, key);
174 av_metadata_set2(&s->metadata, key, value, 0);
177 avio_seek(s->pb, off + len, SEEK_SET);
180 static int asf_read_file_properties(AVFormatContext *s, int64_t size)
182 ASFContext *asf = s->priv_data;
183 AVIOContext *pb = s->pb;
185 ff_get_guid(pb, &asf->hdr.guid);
186 asf->hdr.file_size = avio_rl64(pb);
187 asf->hdr.create_time = avio_rl64(pb);
188 avio_rl64(pb); /* number of packets */
189 asf->hdr.play_time = avio_rl64(pb);
190 asf->hdr.send_time = avio_rl64(pb);
191 asf->hdr.preroll = avio_rl32(pb);
192 asf->hdr.ignore = avio_rl32(pb);
193 asf->hdr.flags = avio_rl32(pb);
194 asf->hdr.min_pktsize = avio_rl32(pb);
195 asf->hdr.max_pktsize = avio_rl32(pb);
196 asf->hdr.max_bitrate = avio_rl32(pb);
197 s->packet_size = asf->hdr.max_pktsize;
202 static int asf_read_stream_properties(AVFormatContext *s, int64_t size)
204 ASFContext *asf = s->priv_data;
205 AVIOContext *pb = s->pb;
209 enum AVMediaType type;
210 int type_specific_size, sizeX;
213 int64_t pos1, pos2, start_time;
214 int test_for_ext_stream_audio, is_dvr_ms_audio=0;
216 if (s->nb_streams == ASF_MAX_STREAMS) {
217 av_log(s, AV_LOG_ERROR, "too many streams\n");
218 return AVERROR(EINVAL);
221 pos1 = avio_tell(pb);
223 st = av_new_stream(s, 0);
225 return AVERROR(ENOMEM);
226 av_set_pts_info(st, 32, 1, 1000); /* 32 bit pts in ms */
227 asf_st = av_mallocz(sizeof(ASFStream));
229 return AVERROR(ENOMEM);
230 st->priv_data = asf_st;
231 start_time = asf->hdr.preroll;
233 asf_st->stream_language_index = 128; // invalid stream index means no language info
235 if(!(asf->hdr.flags & 0x01)) { // if we aren't streaming...
236 st->duration = asf->hdr.play_time /
237 (10000000 / 1000) - start_time;
241 test_for_ext_stream_audio = 0;
242 if (!ff_guidcmp(&g, &ff_asf_audio_stream)) {
243 type = AVMEDIA_TYPE_AUDIO;
244 } else if (!ff_guidcmp(&g, &ff_asf_video_stream)) {
245 type = AVMEDIA_TYPE_VIDEO;
246 } else if (!ff_guidcmp(&g, &ff_asf_jfif_media)) {
247 type = AVMEDIA_TYPE_VIDEO;
248 st->codec->codec_id = CODEC_ID_MJPEG;
249 } else if (!ff_guidcmp(&g, &ff_asf_command_stream)) {
250 type = AVMEDIA_TYPE_DATA;
251 } else if (!ff_guidcmp(&g, &ff_asf_ext_stream_embed_stream_header)) {
252 test_for_ext_stream_audio = 1;
253 type = AVMEDIA_TYPE_UNKNOWN;
258 total_size = avio_rl64(pb);
259 type_specific_size = avio_rl32(pb);
261 st->id = avio_rl16(pb) & 0x7f; /* stream id */
262 // mapping of asf ID to AV stream ID;
263 asf->asfid2avid[st->id] = s->nb_streams - 1;
267 if (test_for_ext_stream_audio) {
269 if (!ff_guidcmp(&g, &ff_asf_ext_stream_audio_stream)) {
270 type = AVMEDIA_TYPE_AUDIO;
281 st->codec->codec_type = type;
282 if (type == AVMEDIA_TYPE_AUDIO) {
283 int ret = ff_get_wav_header(pb, st->codec, type_specific_size);
286 if (is_dvr_ms_audio) {
287 // codec_id and codec_tag are unreliable in dvr_ms
288 // files. Set them later by probing stream.
289 st->request_probe= 1;
290 st->codec->codec_tag = 0;
292 if (st->codec->codec_id == CODEC_ID_AAC) {
293 st->need_parsing = AVSTREAM_PARSE_NONE;
295 st->need_parsing = AVSTREAM_PARSE_FULL;
297 /* We have to init the frame size at some point .... */
298 pos2 = avio_tell(pb);
299 if (size >= (pos2 + 8 - pos1 + 24)) {
300 asf_st->ds_span = avio_r8(pb);
301 asf_st->ds_packet_size = avio_rl16(pb);
302 asf_st->ds_chunk_size = avio_rl16(pb);
303 avio_rl16(pb); //ds_data_size
304 avio_r8(pb); //ds_silence_data
306 //printf("Descrambling: ps:%d cs:%d ds:%d s:%d sd:%d\n",
307 // asf_st->ds_packet_size, asf_st->ds_chunk_size,
308 // asf_st->ds_data_size, asf_st->ds_span, asf_st->ds_silence_data);
309 if (asf_st->ds_span > 1) {
310 if (!asf_st->ds_chunk_size
311 || (asf_st->ds_packet_size/asf_st->ds_chunk_size <= 1)
312 || asf_st->ds_packet_size % asf_st->ds_chunk_size)
313 asf_st->ds_span = 0; // disable descrambling
315 switch (st->codec->codec_id) {
317 st->codec->frame_size = MPA_FRAME_SIZE;
319 case CODEC_ID_PCM_S16LE:
320 case CODEC_ID_PCM_S16BE:
321 case CODEC_ID_PCM_U16LE:
322 case CODEC_ID_PCM_U16BE:
323 case CODEC_ID_PCM_S8:
324 case CODEC_ID_PCM_U8:
325 case CODEC_ID_PCM_ALAW:
326 case CODEC_ID_PCM_MULAW:
327 st->codec->frame_size = 1;
330 /* This is probably wrong, but it prevents a crash later */
331 st->codec->frame_size = 1;
334 } else if (type == AVMEDIA_TYPE_VIDEO &&
335 size - (avio_tell(pb) - pos1 + 24) >= 51) {
339 avio_rl16(pb); /* size */
340 sizeX= avio_rl32(pb); /* size */
341 st->codec->width = avio_rl32(pb);
342 st->codec->height = avio_rl32(pb);
343 /* not available for asf */
344 avio_rl16(pb); /* panes */
345 st->codec->bits_per_coded_sample = avio_rl16(pb); /* depth */
346 tag1 = avio_rl32(pb);
348 // av_log(s, AV_LOG_DEBUG, "size:%d tsize:%d sizeX:%d\n", size, total_size, sizeX);
350 st->codec->extradata_size = sizeX - 40;
351 st->codec->extradata = av_mallocz(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
352 avio_read(pb, st->codec->extradata, st->codec->extradata_size);
355 /* Extract palette from extradata if bpp <= 8 */
356 /* This code assumes that extradata contains only palette */
357 /* This is true for all paletted codecs implemented in ffmpeg */
358 if (st->codec->extradata_size && (st->codec->bits_per_coded_sample <= 8)) {
361 for (i = 0; i < FFMIN(st->codec->extradata_size, AVPALETTE_SIZE)/4; i++)
362 asf_st->palette[i] = av_bswap32(((uint32_t*)st->codec->extradata)[i]);
364 memcpy(asf_st->palette, st->codec->extradata,
365 FFMIN(st->codec->extradata_size, AVPALETTE_SIZE));
367 asf_st->palette_changed = 1;
370 st->codec->codec_tag = tag1;
371 st->codec->codec_id = ff_codec_get_id(ff_codec_bmp_tags, tag1);
372 if(tag1 == MKTAG('D', 'V', 'R', ' ')){
373 st->need_parsing = AVSTREAM_PARSE_FULL;
374 // issue658 containse wrong w/h and MS even puts a fake seq header with wrong w/h in extradata while a correct one is in te stream. maximum lameness
376 st->codec->height = 0;
377 av_freep(&st->codec->extradata);
378 st->codec->extradata_size=0;
380 if(st->codec->codec_id == CODEC_ID_H264)
381 st->need_parsing = AVSTREAM_PARSE_FULL_ONCE;
383 pos2 = avio_tell(pb);
384 avio_skip(pb, size - (pos2 - pos1 + 24));
389 static int asf_read_ext_stream_properties(AVFormatContext *s, int64_t size)
391 ASFContext *asf = s->priv_data;
392 AVIOContext *pb = s->pb;
394 int ext_len, payload_ext_ct, stream_ct, i;
395 uint32_t ext_d, leak_rate, stream_num;
396 unsigned int stream_languageid_index;
398 avio_rl64(pb); // starttime
399 avio_rl64(pb); // endtime
400 leak_rate = avio_rl32(pb); // leak-datarate
401 avio_rl32(pb); // bucket-datasize
402 avio_rl32(pb); // init-bucket-fullness
403 avio_rl32(pb); // alt-leak-datarate
404 avio_rl32(pb); // alt-bucket-datasize
405 avio_rl32(pb); // alt-init-bucket-fullness
406 avio_rl32(pb); // max-object-size
407 avio_rl32(pb); // flags (reliable,seekable,no_cleanpoints?,resend-live-cleanpoints, rest of bits reserved)
408 stream_num = avio_rl16(pb); // stream-num
410 stream_languageid_index = avio_rl16(pb); // stream-language-id-index
411 if (stream_num < 128)
412 asf->streams[stream_num].stream_language_index = stream_languageid_index;
414 avio_rl64(pb); // avg frametime in 100ns units
415 stream_ct = avio_rl16(pb); //stream-name-count
416 payload_ext_ct = avio_rl16(pb); //payload-extension-system-count
418 if (stream_num < 128)
419 asf->stream_bitrates[stream_num] = leak_rate;
421 for (i=0; i<stream_ct; i++){
423 ext_len = avio_rl16(pb);
424 avio_skip(pb, ext_len);
427 for (i=0; i<payload_ext_ct; i++){
430 ext_len=avio_rl32(pb);
431 avio_skip(pb, ext_len);
437 static int asf_read_content_desc(AVFormatContext *s, int64_t size)
439 AVIOContext *pb = s->pb;
440 int len1, len2, len3, len4, len5;
442 len1 = avio_rl16(pb);
443 len2 = avio_rl16(pb);
444 len3 = avio_rl16(pb);
445 len4 = avio_rl16(pb);
446 len5 = avio_rl16(pb);
447 get_tag(s, "title" , 0, len1);
448 get_tag(s, "author" , 0, len2);
449 get_tag(s, "copyright", 0, len3);
450 get_tag(s, "comment" , 0, len4);
456 static int asf_read_ext_content_desc(AVFormatContext *s, int64_t size)
458 AVIOContext *pb = s->pb;
459 ASFContext *asf = s->priv_data;
460 int desc_count, i, ret;
462 desc_count = avio_rl16(pb);
463 for(i=0;i<desc_count;i++) {
464 int name_len,value_type,value_len;
467 name_len = avio_rl16(pb);
468 if (name_len%2) // must be even, broken lavf versions wrote len-1
470 if ((ret = avio_get_str16le(pb, name_len, name, sizeof(name))) < name_len)
471 avio_skip(pb, name_len - ret);
472 value_type = avio_rl16(pb);
473 value_len = avio_rl16(pb);
474 if (!value_type && value_len%2)
477 * My sample has that stream set to 0 maybe that mean the container.
478 * Asf stream count start at 1. I am using 0 to the container value since it's unused
480 if (!strcmp(name, "AspectRatioX")){
481 asf->dar[0].num= get_value(s->pb, value_type);
482 } else if(!strcmp(name, "AspectRatioY")){
483 asf->dar[0].den= get_value(s->pb, value_type);
485 get_tag(s, name, value_type, value_len);
491 static int asf_read_language_list(AVFormatContext *s, int64_t size)
493 AVIOContext *pb = s->pb;
494 ASFContext *asf = s->priv_data;
496 int stream_count = avio_rl16(pb);
497 for(j = 0; j < stream_count; j++) {
499 unsigned int lang_len = avio_r8(pb);
500 if ((ret = avio_get_str16le(pb, lang_len, lang, sizeof(lang))) < lang_len)
501 avio_skip(pb, lang_len - ret);
503 av_strlcpy(asf->stream_languages[j], lang, sizeof(*asf->stream_languages));
509 static int asf_read_metadata(AVFormatContext *s, int64_t size)
511 AVIOContext *pb = s->pb;
512 ASFContext *asf = s->priv_data;
513 int n, stream_num, name_len, value_len, value_type, value_num;
520 avio_rl16(pb); //lang_list_index
521 stream_num= avio_rl16(pb);
522 name_len= avio_rl16(pb);
523 value_type= avio_rl16(pb);
524 value_len= avio_rl32(pb);
526 if ((ret = avio_get_str16le(pb, name_len, name, sizeof(name))) < name_len)
527 avio_skip(pb, name_len - ret);
528 //av_log(s, AV_LOG_ERROR, "%d %d %d %d %d <%s>\n", i, stream_num, name_len, value_type, value_len, name);
529 value_num= avio_rl16(pb);//we should use get_value() here but it does not work 2 is le16 here but le32 elsewhere
530 avio_skip(pb, value_len - 2);
533 if (!strcmp(name, "AspectRatioX")) asf->dar[stream_num].num= value_num;
534 else if(!strcmp(name, "AspectRatioY")) asf->dar[stream_num].den= value_num;
541 static int asf_read_marker(AVFormatContext *s, int64_t size)
543 AVIOContext *pb = s->pb;
544 int i, count, name_len, ret;
547 avio_rl64(pb); // reserved 16 bytes
548 avio_rl64(pb); // ...
549 count = avio_rl32(pb); // markers count
550 avio_rl16(pb); // reserved 2 bytes
551 name_len = avio_rl16(pb); // name length
552 for(i=0;i<name_len;i++){
553 avio_r8(pb); // skip the name
556 for(i=0;i<count;i++){
560 avio_rl64(pb); // offset, 8 bytes
561 pres_time = avio_rl64(pb); // presentation time
562 avio_rl16(pb); // entry length
563 avio_rl32(pb); // send time
564 avio_rl32(pb); // flags
565 name_len = avio_rl32(pb); // name length
566 if ((ret = avio_get_str16le(pb, name_len * 2, name, sizeof(name))) < name_len)
567 avio_skip(pb, name_len - ret);
568 ff_new_chapter(s, i, (AVRational){1, 10000000}, pres_time, AV_NOPTS_VALUE, name );
574 static int asf_read_header(AVFormatContext *s, AVFormatParameters *ap)
576 ASFContext *asf = s->priv_data;
578 AVIOContext *pb = s->pb;
583 if (ff_guidcmp(&g, &ff_asf_header))
589 memset(&asf->asfid2avid, -1, sizeof(asf->asfid2avid));
591 uint64_t gpos= avio_tell(pb);
593 gsize = avio_rl64(pb);
594 av_dlog(s, "%08"PRIx64": ", gpos);
596 av_dlog(s, " size=0x%"PRIx64"\n", gsize);
597 if (!ff_guidcmp(&g, &ff_asf_data_header)) {
598 asf->data_object_offset = avio_tell(pb);
599 // if not streaming, gsize is not unlimited (how?), and there is enough space in the file..
600 if (!(asf->hdr.flags & 0x01) && gsize >= 100) {
601 asf->data_object_size = gsize - 24;
603 asf->data_object_size = (uint64_t)-1;
609 if (!ff_guidcmp(&g, &ff_asf_file_header)) {
610 asf_read_file_properties(s, gsize);
611 } else if (!ff_guidcmp(&g, &ff_asf_stream_header)) {
612 asf_read_stream_properties(s, gsize);
613 } else if (!ff_guidcmp(&g, &ff_asf_comment_header)) {
614 asf_read_content_desc(s, gsize);
615 } else if (!ff_guidcmp(&g, &ff_asf_language_guid)) {
616 asf_read_language_list(s, gsize);
617 } else if (!ff_guidcmp(&g, &ff_asf_extended_content_header)) {
618 asf_read_ext_content_desc(s, gsize);
619 } else if (!ff_guidcmp(&g, &ff_asf_metadata_header)) {
620 asf_read_metadata(s, gsize);
621 } else if (!ff_guidcmp(&g, &ff_asf_ext_stream_header)) {
622 asf_read_ext_stream_properties(s, gsize);
624 // there could be a optional stream properties object to follow
625 // if so the next iteration will pick it up
627 } else if (!ff_guidcmp(&g, &ff_asf_head1_guid)) {
633 } else if (!ff_guidcmp(&g, &ff_asf_marker_header)) {
634 asf_read_marker(s, gsize);
635 } else if (url_feof(pb)) {
639 if (!ff_guidcmp(&g, &ff_asf_content_encryption)) {
640 av_log(s, AV_LOG_WARNING, "DRM protected stream detected, decoding will likely fail!\n");
641 } else if (!ff_guidcmp(&g, &ff_asf_ext_content_encryption)) {
642 av_log(s, AV_LOG_WARNING, "Ext DRM protected stream detected, decoding will likely fail!\n");
643 } else if (!ff_guidcmp(&g, &ff_asf_digital_signature)) {
644 av_log(s, AV_LOG_WARNING, "Digital signature detected, decoding will likely fail!\n");
648 if(avio_tell(pb) != gpos + gsize)
649 av_log(s, AV_LOG_DEBUG, "gpos mismatch our pos=%"PRIu64", end=%"PRIu64"\n", avio_tell(pb)-gpos, gsize);
650 avio_seek(pb, gpos + gsize, SEEK_SET);
658 asf->data_offset = avio_tell(pb);
659 asf->packet_size_left = 0;
662 for(i=0; i<128; i++){
663 int stream_num= asf->asfid2avid[i];
665 AVStream *st = s->streams[stream_num];
666 if (!st->codec->bit_rate)
667 st->codec->bit_rate = asf->stream_bitrates[i];
668 if (asf->dar[i].num > 0 && asf->dar[i].den > 0){
669 av_reduce(&st->sample_aspect_ratio.num,
670 &st->sample_aspect_ratio.den,
671 asf->dar[i].num, asf->dar[i].den, INT_MAX);
672 } else if ((asf->dar[0].num > 0) && (asf->dar[0].den > 0) && (st->codec->codec_type==AVMEDIA_TYPE_VIDEO)) // Use ASF container value if the stream doesn't AR set.
673 av_reduce(&st->sample_aspect_ratio.num,
674 &st->sample_aspect_ratio.den,
675 asf->dar[0].num, asf->dar[0].den, INT_MAX);
677 //av_log(s, AV_LOG_INFO, "i=%d, st->codec->codec_type:%d, dar %d:%d sar=%d:%d\n", i, st->codec->codec_type, dar[i].num, dar[i].den, st->sample_aspect_ratio.num, st->sample_aspect_ratio.den);
679 // copy and convert language codes to the frontend
680 if (asf->streams[i].stream_language_index < 128) {
681 const char *rfc1766 = asf->stream_languages[asf->streams[i].stream_language_index];
682 if (rfc1766 && strlen(rfc1766) > 1) {
683 const char primary_tag[3] = { rfc1766[0], rfc1766[1], '\0' }; // ignore country code if any
684 const char *iso6392 = av_convert_lang_to(primary_tag, AV_LANG_ISO639_2_BIBL);
686 av_metadata_set2(&st->metadata, "language", iso6392, 0);
692 ff_metadata_conv(&s->metadata, NULL, ff_asf_metadata_conv);
697 #define DO_2BITS(bits, var, defval) \
700 case 3: var = avio_rl32(pb); rsize += 4; break; \
701 case 2: var = avio_rl16(pb); rsize += 2; break; \
702 case 1: var = avio_r8(pb); rsize++; break; \
703 default: var = defval; break; \
707 * Load a single ASF packet into the demuxer.
708 * @param s demux context
709 * @param pb context to read data from
710 * @return 0 on success, <0 on error
712 static int ff_asf_get_packet(AVFormatContext *s, AVIOContext *pb)
714 ASFContext *asf = s->priv_data;
715 uint32_t packet_length, padsize;
719 // if we do not know packet size, allow skipping up to 32 kB
721 if (s->packet_size > 0)
722 off= (avio_tell(pb) - s->data_offset) % s->packet_size + 3;
728 if(c == 0x82 && !d && !e)
734 * This code allows handling of -EAGAIN at packet boundaries (i.e.
735 * if the packet sync code above triggers -EAGAIN). This does not
736 * imply complete -EAGAIN handling support at random positions in
739 if (pb->error == AVERROR(EAGAIN))
740 return AVERROR(EAGAIN);
742 av_log(s, AV_LOG_ERROR, "ff asf bad header %x at:%"PRId64"\n", c, avio_tell(pb));
744 if ((c & 0x8f) == 0x82) {
747 av_log(s, AV_LOG_ERROR, "ff asf bad non zero\n");
754 avio_seek(pb, -1, SEEK_CUR); //FIXME
757 asf->packet_flags = c;
758 asf->packet_property = d;
760 DO_2BITS(asf->packet_flags >> 5, packet_length, s->packet_size);
761 DO_2BITS(asf->packet_flags >> 1, padsize, 0); // sequence ignored
762 DO_2BITS(asf->packet_flags >> 3, padsize, 0); // padding length
764 //the following checks prevent overflows and infinite loops
765 if(!packet_length || packet_length >= (1U<<29)){
766 av_log(s, AV_LOG_ERROR, "invalid packet_length %d at:%"PRId64"\n", packet_length, avio_tell(pb));
769 if(padsize >= packet_length){
770 av_log(s, AV_LOG_ERROR, "invalid padsize %d at:%"PRId64"\n", padsize, avio_tell(pb));
774 asf->packet_timestamp = avio_rl32(pb);
775 avio_rl16(pb); /* duration */
776 // rsize has at least 11 bytes which have to be present
778 if (asf->packet_flags & 0x01) {
779 asf->packet_segsizetype = avio_r8(pb); rsize++;
780 asf->packet_segments = asf->packet_segsizetype & 0x3f;
782 asf->packet_segments = 1;
783 asf->packet_segsizetype = 0x80;
785 asf->packet_size_left = packet_length - padsize - rsize;
786 if (packet_length < asf->hdr.min_pktsize)
787 padsize += asf->hdr.min_pktsize - packet_length;
788 asf->packet_padsize = padsize;
789 av_dlog(s, "packet: size=%d padsize=%d left=%d\n", s->packet_size, asf->packet_padsize, asf->packet_size_left);
795 * @return <0 if error
797 static int asf_read_frame_header(AVFormatContext *s, AVIOContext *pb){
798 ASFContext *asf = s->priv_data;
800 int num = avio_r8(pb);
803 asf->packet_segments--;
804 asf->packet_key_frame = num >> 7;
805 asf->stream_index = asf->asfid2avid[num & 0x7f];
806 // sequence should be ignored!
807 DO_2BITS(asf->packet_property >> 4, asf->packet_seq, 0);
808 DO_2BITS(asf->packet_property >> 2, asf->packet_frag_offset, 0);
809 DO_2BITS(asf->packet_property, asf->packet_replic_size, 0);
810 //printf("key:%d stream:%d seq:%d offset:%d replic_size:%d\n", asf->packet_key_frame, asf->stream_index, asf->packet_seq, //asf->packet_frag_offset, asf->packet_replic_size);
811 if (asf->packet_replic_size >= 8) {
812 asf->packet_obj_size = avio_rl32(pb);
813 if(asf->packet_obj_size >= (1<<24) || asf->packet_obj_size <= 0){
814 av_log(s, AV_LOG_ERROR, "packet_obj_size invalid\n");
817 asf->packet_frag_timestamp = avio_rl32(pb); // timestamp
818 if(asf->packet_replic_size >= 8+38+4){
819 // for(i=0; i<asf->packet_replic_size-8; i++)
820 // av_log(s, AV_LOG_DEBUG, "%02X ",avio_r8(pb));
821 // av_log(s, AV_LOG_DEBUG, "\n");
827 avio_skip(pb, asf->packet_replic_size - 8 - 38 - 4);
828 if(ts0!= -1) asf->packet_frag_timestamp= ts0/10000;
829 else asf->packet_frag_timestamp= AV_NOPTS_VALUE;
831 avio_skip(pb, asf->packet_replic_size - 8);
832 rsize += asf->packet_replic_size; // FIXME - check validity
833 } else if (asf->packet_replic_size==1){
834 // multipacket - frag_offset is beginning timestamp
835 asf->packet_time_start = asf->packet_frag_offset;
836 asf->packet_frag_offset = 0;
837 asf->packet_frag_timestamp = asf->packet_timestamp;
839 asf->packet_time_delta = avio_r8(pb);
841 }else if(asf->packet_replic_size!=0){
842 av_log(s, AV_LOG_ERROR, "unexpected packet_replic_size of %d\n", asf->packet_replic_size);
845 if (asf->packet_flags & 0x01) {
846 DO_2BITS(asf->packet_segsizetype >> 6, asf->packet_frag_size, 0); // 0 is illegal
847 if(asf->packet_frag_size > asf->packet_size_left - rsize){
848 if (asf->packet_frag_size > asf->packet_size_left - rsize + asf->packet_padsize) {
849 av_log(s, AV_LOG_ERROR, "packet_frag_size is invalid (%d-%d)\n", asf->packet_size_left, rsize);
852 int diff = asf->packet_frag_size - (asf->packet_size_left - rsize);
853 asf->packet_size_left += diff;
854 asf->packet_padsize -= diff;
857 //printf("Fragsize %d\n", asf->packet_frag_size);
859 if (rsize > asf->packet_size_left) {
860 av_log(s, AV_LOG_ERROR, "packet_replic_size is invalid\n");
863 asf->packet_frag_size = asf->packet_size_left - rsize;
864 //printf("Using rest %d %d %d\n", asf->packet_frag_size, asf->packet_size_left, rsize);
866 if (asf->packet_replic_size == 1) {
867 asf->packet_multi_size = asf->packet_frag_size;
868 if (asf->packet_multi_size > asf->packet_size_left)
871 asf->packet_size_left -= rsize;
872 //printf("___objsize____ %d %d rs:%d\n", asf->packet_obj_size, asf->packet_frag_offset, rsize);
878 * Parse data from individual ASF packets (which were previously loaded
879 * with asf_get_packet()).
880 * @param s demux context
881 * @param pb context to read data from
882 * @param pkt pointer to store packet data into
883 * @return 0 if data was stored in pkt, <0 on error or 1 if more ASF
884 * packets need to be loaded (through asf_get_packet())
886 static int ff_asf_parse_packet(AVFormatContext *s, AVIOContext *pb, AVPacket *pkt)
888 ASFContext *asf = s->priv_data;
889 ASFStream *asf_st = 0;
894 if (asf->packet_size_left < FRAME_HEADER_SIZE
895 || asf->packet_segments < 1) {
896 //asf->packet_size_left <= asf->packet_padsize) {
897 int ret = asf->packet_size_left + asf->packet_padsize;
898 //printf("PacketLeftSize:%d Pad:%d Pos:%"PRId64"\n", asf->packet_size_left, asf->packet_padsize, avio_tell(pb));
903 asf->packet_pos= avio_tell(pb);
904 if (asf->data_object_size != (uint64_t)-1 &&
905 (asf->packet_pos - asf->data_object_offset >= asf->data_object_size))
906 return AVERROR_EOF; /* Do not exceed the size of the data object */
909 if (asf->packet_time_start == 0) {
910 if(asf_read_frame_header(s, pb) < 0){
911 asf->packet_segments= 0;
914 if (asf->stream_index < 0
915 || s->streams[asf->stream_index]->discard >= AVDISCARD_ALL
916 || (!asf->packet_key_frame && s->streams[asf->stream_index]->discard >= AVDISCARD_NONKEY)
918 asf->packet_time_start = 0;
919 /* unhandled packet (should not happen) */
920 avio_skip(pb, asf->packet_frag_size);
921 asf->packet_size_left -= asf->packet_frag_size;
922 if(asf->stream_index < 0)
923 av_log(s, AV_LOG_ERROR, "ff asf skip %d (unknown stream)\n", asf->packet_frag_size);
926 asf->asf_st = s->streams[asf->stream_index]->priv_data;
928 asf_st = asf->asf_st;
930 if (asf->packet_replic_size == 1) {
931 // frag_offset is here used as the beginning timestamp
932 asf->packet_frag_timestamp = asf->packet_time_start;
933 asf->packet_time_start += asf->packet_time_delta;
934 asf->packet_obj_size = asf->packet_frag_size = avio_r8(pb);
935 asf->packet_size_left--;
936 asf->packet_multi_size--;
937 if (asf->packet_multi_size < asf->packet_obj_size)
939 asf->packet_time_start = 0;
940 avio_skip(pb, asf->packet_multi_size);
941 asf->packet_size_left -= asf->packet_multi_size;
944 asf->packet_multi_size -= asf->packet_obj_size;
945 //printf("COMPRESS size %d %d %d ms:%d\n", asf->packet_obj_size, asf->packet_frag_timestamp, asf->packet_size_left, asf->packet_multi_size);
947 if( /*asf->packet_frag_size == asf->packet_obj_size*/
948 asf_st->frag_offset + asf->packet_frag_size <= asf_st->pkt.size
949 && asf_st->frag_offset + asf->packet_frag_size > asf->packet_obj_size){
950 av_log(s, AV_LOG_INFO, "ignoring invalid packet_obj_size (%d %d %d %d)\n",
951 asf_st->frag_offset, asf->packet_frag_size,
952 asf->packet_obj_size, asf_st->pkt.size);
953 asf->packet_obj_size= asf_st->pkt.size;
956 if ( asf_st->pkt.size != asf->packet_obj_size
957 || asf_st->frag_offset + asf->packet_frag_size > asf_st->pkt.size) { //FIXME is this condition sufficient?
958 if(asf_st->pkt.data){
959 av_log(s, AV_LOG_INFO, "freeing incomplete packet size %d, new %d\n", asf_st->pkt.size, asf->packet_obj_size);
960 asf_st->frag_offset = 0;
961 av_free_packet(&asf_st->pkt);
964 av_new_packet(&asf_st->pkt, asf->packet_obj_size);
965 asf_st->seq = asf->packet_seq;
966 asf_st->pkt.dts = asf->packet_frag_timestamp - asf->hdr.preroll;
967 asf_st->pkt.stream_index = asf->stream_index;
969 asf_st->packet_pos= asf->packet_pos;
970 if (asf_st->pkt.data && asf_st->palette_changed) {
972 pal = av_packet_new_side_data(pkt, AV_PKT_DATA_PALETTE,
975 av_log(s, AV_LOG_ERROR, "Cannot append palette to packet\n");
977 memcpy(pal, asf_st->palette, AVPALETTE_SIZE);
978 asf_st->palette_changed = 0;
981 //printf("new packet: stream:%d key:%d packet_key:%d audio:%d size:%d\n",
982 //asf->stream_index, asf->packet_key_frame, asf_st->pkt.flags & AV_PKT_FLAG_KEY,
983 //s->streams[asf->stream_index]->codec->codec_type == AVMEDIA_TYPE_AUDIO, asf->packet_obj_size);
984 if (s->streams[asf->stream_index]->codec->codec_type == AVMEDIA_TYPE_AUDIO)
985 asf->packet_key_frame = 1;
986 if (asf->packet_key_frame)
987 asf_st->pkt.flags |= AV_PKT_FLAG_KEY;
991 //printf("READ PACKET s:%d os:%d o:%d,%d l:%d DATA:%p\n",
992 // s->packet_size, asf_st->pkt.size, asf->packet_frag_offset,
993 // asf_st->frag_offset, asf->packet_frag_size, asf_st->pkt.data);
994 asf->packet_size_left -= asf->packet_frag_size;
995 if (asf->packet_size_left < 0)
998 if( asf->packet_frag_offset >= asf_st->pkt.size
999 || asf->packet_frag_size > asf_st->pkt.size - asf->packet_frag_offset){
1000 av_log(s, AV_LOG_ERROR, "packet fragment position invalid %u,%u not in %u\n",
1001 asf->packet_frag_offset, asf->packet_frag_size, asf_st->pkt.size);
1005 ret = avio_read(pb, asf_st->pkt.data + asf->packet_frag_offset,
1006 asf->packet_frag_size);
1007 if (ret != asf->packet_frag_size) {
1008 if (ret < 0 || asf->packet_frag_offset + ret == 0)
1009 return ret < 0 ? ret : AVERROR_EOF;
1010 if (asf_st->ds_span > 1) {
1011 // scrambling, we can either drop it completely or fill the remainder
1012 // TODO: should we fill the whole packet instead of just the current
1014 memset(asf_st->pkt.data + asf->packet_frag_offset + ret, 0,
1015 asf->packet_frag_size - ret);
1016 ret = asf->packet_frag_size;
1018 // no scrambling, so we can return partial packets
1019 av_shrink_packet(&asf_st->pkt, asf->packet_frag_offset + ret);
1021 if (s->key && s->keylen == 20)
1022 ff_asfcrypt_dec(s->key, asf_st->pkt.data + asf->packet_frag_offset,
1024 asf_st->frag_offset += ret;
1025 /* test if whole packet is read */
1026 if (asf_st->frag_offset == asf_st->pkt.size) {
1027 //workaround for macroshit radio DVR-MS files
1028 if( s->streams[asf->stream_index]->codec->codec_id == CODEC_ID_MPEG2VIDEO
1029 && asf_st->pkt.size > 100){
1031 for(i=0; i<asf_st->pkt.size && !asf_st->pkt.data[i]; i++);
1032 if(i == asf_st->pkt.size){
1033 av_log(s, AV_LOG_DEBUG, "discarding ms fart\n");
1034 asf_st->frag_offset = 0;
1035 av_free_packet(&asf_st->pkt);
1041 if (asf_st->ds_span > 1) {
1042 if(asf_st->pkt.size != asf_st->ds_packet_size * asf_st->ds_span){
1043 av_log(s, AV_LOG_ERROR, "pkt.size != ds_packet_size * ds_span (%d %d %d)\n", asf_st->pkt.size, asf_st->ds_packet_size, asf_st->ds_span);
1045 /* packet descrambling */
1046 uint8_t *newdata = av_malloc(asf_st->pkt.size + FF_INPUT_BUFFER_PADDING_SIZE);
1049 memset(newdata + asf_st->pkt.size, 0, FF_INPUT_BUFFER_PADDING_SIZE);
1050 while (offset < asf_st->pkt.size) {
1051 int off = offset / asf_st->ds_chunk_size;
1052 int row = off / asf_st->ds_span;
1053 int col = off % asf_st->ds_span;
1054 int idx = row + col * asf_st->ds_packet_size / asf_st->ds_chunk_size;
1055 //printf("off:%d row:%d col:%d idx:%d\n", off, row, col, idx);
1057 assert(offset + asf_st->ds_chunk_size <= asf_st->pkt.size);
1058 assert(idx+1 <= asf_st->pkt.size / asf_st->ds_chunk_size);
1059 memcpy(newdata + offset,
1060 asf_st->pkt.data + idx * asf_st->ds_chunk_size,
1061 asf_st->ds_chunk_size);
1062 offset += asf_st->ds_chunk_size;
1064 av_free(asf_st->pkt.data);
1065 asf_st->pkt.data = newdata;
1069 asf_st->frag_offset = 0;
1071 //printf("packet %d %d\n", asf_st->pkt.size, asf->packet_frag_size);
1072 asf_st->pkt.size = 0;
1073 asf_st->pkt.data = 0;
1074 break; // packet completed
1080 static int asf_read_packet(AVFormatContext *s, AVPacket *pkt)
1082 ASFContext *asf = s->priv_data;
1087 /* parse cached packets, if any */
1088 if ((ret = ff_asf_parse_packet(s, s->pb, pkt)) <= 0)
1090 if ((ret = ff_asf_get_packet(s, s->pb)) < 0)
1091 assert(asf->packet_size_left < FRAME_HEADER_SIZE || asf->packet_segments < 1);
1092 asf->packet_time_start = 0;
1098 // Added to support seeking after packets have been read
1099 // If information is not reset, read_packet fails due to
1100 // leftover information from previous reads
1101 static void asf_reset_header(AVFormatContext *s)
1103 ASFContext *asf = s->priv_data;
1107 asf->packet_size_left = 0;
1108 asf->packet_segments = 0;
1109 asf->packet_flags = 0;
1110 asf->packet_property = 0;
1111 asf->packet_timestamp = 0;
1112 asf->packet_segsizetype = 0;
1113 asf->packet_segments = 0;
1114 asf->packet_seq = 0;
1115 asf->packet_replic_size = 0;
1116 asf->packet_key_frame = 0;
1117 asf->packet_padsize = 0;
1118 asf->packet_frag_offset = 0;
1119 asf->packet_frag_size = 0;
1120 asf->packet_frag_timestamp = 0;
1121 asf->packet_multi_size = 0;
1122 asf->packet_obj_size = 0;
1123 asf->packet_time_delta = 0;
1124 asf->packet_time_start = 0;
1126 for(i=0; i<s->nb_streams; i++){
1127 asf_st= s->streams[i]->priv_data;
1128 av_free_packet(&asf_st->pkt);
1129 asf_st->frag_offset=0;
1135 static int asf_read_close(AVFormatContext *s)
1137 asf_reset_header(s);
1142 static int64_t asf_read_pts(AVFormatContext *s, int stream_index, int64_t *ppos, int64_t pos_limit)
1144 AVPacket pkt1, *pkt = &pkt1;
1149 int64_t start_pos[ASF_MAX_STREAMS];
1151 for(i=0; i<s->nb_streams; i++){
1155 if (s->packet_size > 0)
1156 pos= (pos+s->packet_size-1-s->data_offset)/s->packet_size*s->packet_size+ s->data_offset;
1158 avio_seek(s->pb, pos, SEEK_SET);
1160 //printf("asf_read_pts\n");
1161 asf_reset_header(s);
1163 if (av_read_frame(s, pkt) < 0){
1164 av_log(s, AV_LOG_INFO, "asf_read_pts failed\n");
1165 return AV_NOPTS_VALUE;
1170 av_free_packet(pkt);
1171 if(pkt->flags&AV_PKT_FLAG_KEY){
1172 i= pkt->stream_index;
1174 asf_st= s->streams[i]->priv_data;
1176 // assert((asf_st->packet_pos - s->data_offset) % s->packet_size == 0);
1177 pos= asf_st->packet_pos;
1179 av_add_index_entry(s->streams[i], pos, pts, pkt->size, pos - start_pos[i] + 1, AVINDEX_KEYFRAME);
1180 start_pos[i]= asf_st->packet_pos + 1;
1182 if(pkt->stream_index == stream_index)
1188 //printf("found keyframe at %"PRId64" stream %d stamp:%"PRId64"\n", *ppos, stream_index, pts);
1193 static void asf_build_simple_index(AVFormatContext *s, int stream_index)
1196 ASFContext *asf = s->priv_data;
1197 int64_t current_pos= avio_tell(s->pb);
1200 avio_seek(s->pb, asf->data_object_offset + asf->data_object_size, SEEK_SET);
1201 ff_get_guid(s->pb, &g);
1203 /* the data object can be followed by other top-level objects,
1204 skip them until the simple index object is reached */
1205 while (ff_guidcmp(&g, &index_guid)) {
1206 int64_t gsize= avio_rl64(s->pb);
1207 if (gsize < 24 || url_feof(s->pb)) {
1208 avio_seek(s->pb, current_pos, SEEK_SET);
1211 avio_skip(s->pb, gsize-24);
1212 ff_get_guid(s->pb, &g);
1216 int64_t itime, last_pos=-1;
1218 int64_t av_unused gsize= avio_rl64(s->pb);
1219 ff_get_guid(s->pb, &g);
1220 itime=avio_rl64(s->pb);
1221 pct=avio_rl32(s->pb);
1222 ict=avio_rl32(s->pb);
1223 av_log(s, AV_LOG_DEBUG, "itime:0x%"PRIx64", pct:%d, ict:%d\n",itime,pct,ict);
1225 for (i=0;i<ict;i++){
1226 int pktnum=avio_rl32(s->pb);
1227 int pktct =avio_rl16(s->pb);
1228 int64_t pos = s->data_offset + s->packet_size*(int64_t)pktnum;
1229 int64_t index_pts= FFMAX(av_rescale(itime, i, 10000) - asf->hdr.preroll, 0);
1231 if(pos != last_pos){
1232 av_log(s, AV_LOG_DEBUG, "pktnum:%d, pktct:%d pts: %"PRId64"\n", pktnum, pktct, index_pts);
1233 av_add_index_entry(s->streams[stream_index], pos, index_pts, s->packet_size, 0, AVINDEX_KEYFRAME);
1239 avio_seek(s->pb, current_pos, SEEK_SET);
1242 static int asf_read_seek(AVFormatContext *s, int stream_index, int64_t pts, int flags)
1244 ASFContext *asf = s->priv_data;
1245 AVStream *st = s->streams[stream_index];
1249 if (s->packet_size <= 0)
1252 /* Try using the protocol's read_seek if available */
1254 int ret = avio_seek_time(s->pb, stream_index, pts, flags);
1256 asf_reset_header(s);
1257 if (ret != AVERROR(ENOSYS))
1261 if (!asf->index_read)
1262 asf_build_simple_index(s, stream_index);
1264 if(!(asf->index_read && st->index_entries)){
1265 if(av_seek_frame_binary(s, stream_index, pts, flags)<0)
1268 index= av_index_search_timestamp(st, pts, flags);
1272 /* find the position */
1273 pos = st->index_entries[index].pos;
1276 av_log(s, AV_LOG_DEBUG, "SEEKTO: %"PRId64"\n", pos);
1277 avio_seek(s->pb, pos, SEEK_SET);
1279 asf_reset_header(s);
1283 AVInputFormat ff_asf_demuxer = {
1285 NULL_IF_CONFIG_SMALL("ASF format"),