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"
31 #include "avlanguage.h"
33 void ff_mms_set_stream_selection(URLContext *h, AVFormatContext *format);
38 #define ASF_MAX_STREAMS 127
39 #define FRAME_HEADER_SIZE 17
40 // Fix Me! FRAME_HEADER_SIZE may be different.
42 static const ff_asf_guid index_guid = {
43 0x90, 0x08, 0x00, 0x33, 0xb1, 0xe5, 0xcf, 0x11, 0x89, 0xf4, 0x00, 0xa0, 0xc9, 0x03, 0x49, 0xcb
46 static const ff_asf_guid stream_bitrate_guid = { /* (http://get.to/sdp) */
47 0xce, 0x75, 0xf8, 0x7b, 0x8d, 0x46, 0xd1, 0x11, 0x8d, 0x82, 0x00, 0x60, 0x97, 0xc9, 0xa2, 0xb2
49 /**********************************/
52 static int guidcmp(const void *g1, const void *g2)
54 return memcmp(g1, g2, sizeof(ff_asf_guid));
58 #define PRINT_IF_GUID(g,cmp) \
59 if (!guidcmp(g, &cmp)) \
60 dprintf(NULL, "(GUID: %s) ", #cmp)
62 static void print_guid(const ff_asf_guid *g)
65 PRINT_IF_GUID(g, ff_asf_header);
66 else PRINT_IF_GUID(g, ff_asf_file_header);
67 else PRINT_IF_GUID(g, ff_asf_stream_header);
68 else PRINT_IF_GUID(g, ff_asf_audio_stream);
69 else PRINT_IF_GUID(g, ff_asf_audio_conceal_none);
70 else PRINT_IF_GUID(g, ff_asf_video_stream);
71 else PRINT_IF_GUID(g, ff_asf_video_conceal_none);
72 else PRINT_IF_GUID(g, ff_asf_command_stream);
73 else PRINT_IF_GUID(g, ff_asf_comment_header);
74 else PRINT_IF_GUID(g, ff_asf_codec_comment_header);
75 else PRINT_IF_GUID(g, ff_asf_codec_comment1_header);
76 else PRINT_IF_GUID(g, ff_asf_data_header);
77 else PRINT_IF_GUID(g, index_guid);
78 else PRINT_IF_GUID(g, ff_asf_head1_guid);
79 else PRINT_IF_GUID(g, ff_asf_head2_guid);
80 else PRINT_IF_GUID(g, ff_asf_my_guid);
81 else PRINT_IF_GUID(g, ff_asf_ext_stream_header);
82 else PRINT_IF_GUID(g, ff_asf_extended_content_header);
83 else PRINT_IF_GUID(g, ff_asf_ext_stream_embed_stream_header);
84 else PRINT_IF_GUID(g, ff_asf_ext_stream_audio_stream);
85 else PRINT_IF_GUID(g, ff_asf_metadata_header);
86 else PRINT_IF_GUID(g, ff_asf_marker_header);
87 else PRINT_IF_GUID(g, stream_bitrate_guid);
88 else PRINT_IF_GUID(g, ff_asf_language_guid);
90 dprintf(NULL, "(GUID: unknown) ");
92 dprintf(NULL, " 0x%02x,", (*g)[i]);
100 static void get_guid(ByteIOContext *s, ff_asf_guid *g)
102 assert(sizeof(*g) == 16);
103 get_buffer(s, *g, sizeof(*g));
107 static void get_str16(ByteIOContext *pb, char *buf, int buf_size)
116 if ((q - buf) < buf_size - 1)
124 static void get_str16_nolen(ByteIOContext *pb, int len, char *buf, int buf_size)
131 GET_UTF16(ch, (len -= 2) >= 0 ? get_le16(pb) : 0, break;)
132 PUT_UTF8(ch, tmp, if (q - buf < buf_size - 1) *q++ = tmp;)
139 static int asf_probe(AVProbeData *pd)
141 /* check file header */
142 if (!guidcmp(pd->buf, &ff_asf_header))
143 return AVPROBE_SCORE_MAX;
148 static int get_value(ByteIOContext *pb, int type){
150 case 2: return get_le32(pb);
151 case 3: return get_le32(pb);
152 case 4: return get_le64(pb);
153 case 5: return get_le16(pb);
154 default:return INT_MIN;
158 static void get_tag(AVFormatContext *s, const char *key, int type, int len)
162 if ((unsigned)len >= (UINT_MAX - 1)/2)
165 value = av_malloc(2*len+1);
169 if (type == 0) { // UTF16-LE
170 get_str16_nolen(s->pb, len, value, 2*len + 1);
171 } else if (type > 1 && type <= 5) { // boolean or DWORD or QWORD or WORD
172 uint64_t num = get_value(s->pb, type);
173 snprintf(value, len, "%"PRIu64, num);
175 url_fskip(s->pb, len);
177 av_log(s, AV_LOG_DEBUG, "Unsupported value type %d in tag %s.\n", type, key);
180 av_metadata_set2(&s->metadata, key, value, 0);
184 static int asf_read_header(AVFormatContext *s, AVFormatParameters *ap)
186 ASFContext *asf = s->priv_data;
188 ByteIOContext *pb = s->pb;
194 uint32_t bitrate[128];
196 memset(dar, 0, sizeof(dar));
197 memset(bitrate, 0, sizeof(bitrate));
200 if (guidcmp(&g, &ff_asf_header))
206 memset(&asf->asfid2avid, -1, sizeof(asf->asfid2avid));
208 uint64_t gpos= url_ftell(pb);
210 gsize = get_le64(pb);
211 dprintf(s, "%08"PRIx64": ", gpos);
213 dprintf(s, " size=0x%"PRIx64"\n", gsize);
214 if (!guidcmp(&g, &ff_asf_data_header)) {
215 asf->data_object_offset = url_ftell(pb);
216 // if not streaming, gsize is not unlimited (how?), and there is enough space in the file..
217 if (!(asf->hdr.flags & 0x01) && gsize >= 100) {
218 asf->data_object_size = gsize - 24;
220 asf->data_object_size = (uint64_t)-1;
226 if (!guidcmp(&g, &ff_asf_file_header)) {
227 get_guid(pb, &asf->hdr.guid);
228 asf->hdr.file_size = get_le64(pb);
229 asf->hdr.create_time = get_le64(pb);
230 asf->nb_packets = get_le64(pb);
231 asf->hdr.play_time = get_le64(pb);
232 asf->hdr.send_time = get_le64(pb);
233 asf->hdr.preroll = get_le32(pb);
234 asf->hdr.ignore = get_le32(pb);
235 asf->hdr.flags = get_le32(pb);
236 asf->hdr.min_pktsize = get_le32(pb);
237 asf->hdr.max_pktsize = get_le32(pb);
238 asf->hdr.max_bitrate = get_le32(pb);
239 s->packet_size = asf->hdr.max_pktsize;
240 } else if (!guidcmp(&g, &ff_asf_stream_header)) {
241 enum AVMediaType type;
242 int type_specific_size, sizeX;
245 int64_t pos1, pos2, start_time;
246 int test_for_ext_stream_audio, is_dvr_ms_audio=0;
248 if (s->nb_streams == ASF_MAX_STREAMS) {
249 av_log(s, AV_LOG_ERROR, "too many streams\n");
250 return AVERROR(EINVAL);
253 pos1 = url_ftell(pb);
255 st = av_new_stream(s, 0);
257 return AVERROR(ENOMEM);
258 av_set_pts_info(st, 32, 1, 1000); /* 32 bit pts in ms */
259 asf_st = av_mallocz(sizeof(ASFStream));
261 return AVERROR(ENOMEM);
262 st->priv_data = asf_st;
263 start_time = asf->hdr.preroll;
265 asf_st->stream_language_index = 128; // invalid stream index means no language info
267 if(!(asf->hdr.flags & 0x01)) { // if we aren't streaming...
268 st->duration = asf->hdr.play_time /
269 (10000000 / 1000) - start_time;
273 test_for_ext_stream_audio = 0;
274 if (!guidcmp(&g, &ff_asf_audio_stream)) {
275 type = AVMEDIA_TYPE_AUDIO;
276 } else if (!guidcmp(&g, &ff_asf_video_stream)) {
277 type = AVMEDIA_TYPE_VIDEO;
278 } else if (!guidcmp(&g, &ff_asf_jfif_media)) {
279 type = AVMEDIA_TYPE_VIDEO;
280 st->codec->codec_id = CODEC_ID_MJPEG;
281 } else if (!guidcmp(&g, &ff_asf_command_stream)) {
282 type = AVMEDIA_TYPE_DATA;
283 } else if (!guidcmp(&g, &ff_asf_ext_stream_embed_stream_header)) {
284 test_for_ext_stream_audio = 1;
285 type = AVMEDIA_TYPE_UNKNOWN;
290 total_size = get_le64(pb);
291 type_specific_size = get_le32(pb);
293 st->id = get_le16(pb) & 0x7f; /* stream id */
294 // mapping of asf ID to AV stream ID;
295 asf->asfid2avid[st->id] = s->nb_streams - 1;
299 if (test_for_ext_stream_audio) {
301 if (!guidcmp(&g, &ff_asf_ext_stream_audio_stream)) {
302 type = AVMEDIA_TYPE_AUDIO;
313 st->codec->codec_type = type;
314 if (type == AVMEDIA_TYPE_AUDIO) {
315 ff_get_wav_header(pb, st->codec, type_specific_size);
316 if (is_dvr_ms_audio) {
317 // codec_id and codec_tag are unreliable in dvr_ms
318 // files. Set them later by probing stream.
319 st->codec->codec_id = CODEC_ID_PROBE;
320 st->codec->codec_tag = 0;
322 if (st->codec->codec_id == CODEC_ID_AAC) {
323 st->need_parsing = AVSTREAM_PARSE_NONE;
325 st->need_parsing = AVSTREAM_PARSE_FULL;
327 /* We have to init the frame size at some point .... */
328 pos2 = url_ftell(pb);
329 if (gsize >= (pos2 + 8 - pos1 + 24)) {
330 asf_st->ds_span = get_byte(pb);
331 asf_st->ds_packet_size = get_le16(pb);
332 asf_st->ds_chunk_size = get_le16(pb);
333 get_le16(pb); //ds_data_size
334 get_byte(pb); //ds_silence_data
336 //printf("Descrambling: ps:%d cs:%d ds:%d s:%d sd:%d\n",
337 // asf_st->ds_packet_size, asf_st->ds_chunk_size,
338 // asf_st->ds_data_size, asf_st->ds_span, asf_st->ds_silence_data);
339 if (asf_st->ds_span > 1) {
340 if (!asf_st->ds_chunk_size
341 || (asf_st->ds_packet_size/asf_st->ds_chunk_size <= 1)
342 || asf_st->ds_packet_size % asf_st->ds_chunk_size)
343 asf_st->ds_span = 0; // disable descrambling
345 switch (st->codec->codec_id) {
347 st->codec->frame_size = MPA_FRAME_SIZE;
349 case CODEC_ID_PCM_S16LE:
350 case CODEC_ID_PCM_S16BE:
351 case CODEC_ID_PCM_U16LE:
352 case CODEC_ID_PCM_U16BE:
353 case CODEC_ID_PCM_S8:
354 case CODEC_ID_PCM_U8:
355 case CODEC_ID_PCM_ALAW:
356 case CODEC_ID_PCM_MULAW:
357 st->codec->frame_size = 1;
360 /* This is probably wrong, but it prevents a crash later */
361 st->codec->frame_size = 1;
364 } else if (type == AVMEDIA_TYPE_VIDEO &&
365 gsize - (url_ftell(pb) - pos1 + 24) >= 51) {
369 size = get_le16(pb); /* size */
370 sizeX= get_le32(pb); /* size */
371 st->codec->width = get_le32(pb);
372 st->codec->height = get_le32(pb);
373 /* not available for asf */
374 get_le16(pb); /* panes */
375 st->codec->bits_per_coded_sample = get_le16(pb); /* depth */
378 // av_log(s, AV_LOG_DEBUG, "size:%d tsize:%d sizeX:%d\n", size, total_size, sizeX);
381 st->codec->extradata_size = size - 40;
382 st->codec->extradata = av_mallocz(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
383 get_buffer(pb, st->codec->extradata, st->codec->extradata_size);
386 /* Extract palette from extradata if bpp <= 8 */
387 /* This code assumes that extradata contains only palette */
388 /* This is true for all paletted codecs implemented in ffmpeg */
389 if (st->codec->extradata_size && (st->codec->bits_per_coded_sample <= 8)) {
390 st->codec->palctrl = av_mallocz(sizeof(AVPaletteControl));
392 for (i = 0; i < FFMIN(st->codec->extradata_size, AVPALETTE_SIZE)/4; i++)
393 st->codec->palctrl->palette[i] = av_bswap32(((uint32_t*)st->codec->extradata)[i]);
395 memcpy(st->codec->palctrl->palette, st->codec->extradata,
396 FFMIN(st->codec->extradata_size, AVPALETTE_SIZE));
398 st->codec->palctrl->palette_changed = 1;
401 st->codec->codec_tag = tag1;
402 st->codec->codec_id = ff_codec_get_id(ff_codec_bmp_tags, tag1);
403 if(tag1 == MKTAG('D', 'V', 'R', ' ')){
404 st->need_parsing = AVSTREAM_PARSE_FULL;
405 // 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
407 st->codec->height = 0;
408 av_freep(&st->codec->extradata);
409 st->codec->extradata_size=0;
411 if(st->codec->codec_id == CODEC_ID_H264)
412 st->need_parsing = AVSTREAM_PARSE_FULL_ONCE;
414 pos2 = url_ftell(pb);
415 url_fskip(pb, gsize - (pos2 - pos1 + 24));
416 } else if (!guidcmp(&g, &ff_asf_comment_header)) {
417 int len1, len2, len3, len4, len5;
424 get_tag(s, "title" , 0, len1);
425 get_tag(s, "author" , 0, len2);
426 get_tag(s, "copyright", 0, len3);
427 get_tag(s, "comment" , 0, len4);
429 } else if (!guidcmp(&g, &stream_bitrate_guid)) {
430 int stream_count = get_le16(pb);
433 // av_log(s, AV_LOG_ERROR, "stream bitrate properties\n");
434 // av_log(s, AV_LOG_ERROR, "streams %d\n", streams);
435 for(j = 0; j < stream_count; j++) {
436 int flags, bitrate, stream_id;
439 bitrate= get_le32(pb);
440 stream_id= (flags & 0x7f);
441 // av_log(s, AV_LOG_ERROR, "flags: 0x%x stream id %d, bitrate %d\n", flags, stream_id, bitrate);
442 asf->stream_bitrates[stream_id]= bitrate;
444 } else if (!guidcmp(&g, &ff_asf_language_guid)) {
446 int stream_count = get_le16(pb);
447 for(j = 0; j < stream_count; j++) {
449 unsigned int lang_len = get_byte(pb);
450 get_str16_nolen(pb, lang_len, lang, sizeof(lang));
452 av_strlcpy(asf->stream_languages[j], lang, sizeof(*asf->stream_languages));
454 } else if (!guidcmp(&g, &ff_asf_extended_content_header)) {
457 desc_count = get_le16(pb);
458 for(i=0;i<desc_count;i++) {
459 int name_len,value_type,value_len;
462 name_len = get_le16(pb);
463 if (name_len%2) // must be even, broken lavf versions wrote len-1
465 get_str16_nolen(pb, name_len, name, sizeof(name));
466 value_type = get_le16(pb);
467 value_len = get_le16(pb);
468 if (!value_type && value_len%2)
471 * My sample has that stream set to 0 maybe that mean the container.
472 * Asf stream count start at 1. I am using 0 to the container value since it's unused
474 if (!strcmp(name, "AspectRatioX")){
475 dar[0].num= get_value(s->pb, value_type);
476 } else if(!strcmp(name, "AspectRatioY")){
477 dar[0].den= get_value(s->pb, value_type);
479 get_tag(s, name, value_type, value_len);
481 } else if (!guidcmp(&g, &ff_asf_metadata_header)) {
482 int n, stream_num, name_len, value_len, value_type, value_num;
488 get_le16(pb); //lang_list_index
489 stream_num= get_le16(pb);
490 name_len= get_le16(pb);
491 value_type= get_le16(pb);
492 value_len= get_le32(pb);
494 get_str16_nolen(pb, name_len, name, sizeof(name));
495 //av_log(s, AV_LOG_ERROR, "%d %d %d %d %d <%s>\n", i, stream_num, name_len, value_type, value_len, name);
496 value_num= get_le16(pb);//we should use get_value() here but it does not work 2 is le16 here but le32 elsewhere
497 url_fskip(pb, value_len - 2);
500 if (!strcmp(name, "AspectRatioX")) dar[stream_num].num= value_num;
501 else if(!strcmp(name, "AspectRatioY")) dar[stream_num].den= value_num;
504 } else if (!guidcmp(&g, &ff_asf_ext_stream_header)) {
505 int ext_len, payload_ext_ct, stream_ct;
506 uint32_t ext_d, leak_rate, stream_num;
507 unsigned int stream_languageid_index;
509 get_le64(pb); // starttime
510 get_le64(pb); // endtime
511 leak_rate = get_le32(pb); // leak-datarate
512 get_le32(pb); // bucket-datasize
513 get_le32(pb); // init-bucket-fullness
514 get_le32(pb); // alt-leak-datarate
515 get_le32(pb); // alt-bucket-datasize
516 get_le32(pb); // alt-init-bucket-fullness
517 get_le32(pb); // max-object-size
518 get_le32(pb); // flags (reliable,seekable,no_cleanpoints?,resend-live-cleanpoints, rest of bits reserved)
519 stream_num = get_le16(pb); // stream-num
521 stream_languageid_index = get_le16(pb); // stream-language-id-index
522 if (stream_num < 128)
523 asf->streams[stream_num].stream_language_index = stream_languageid_index;
525 get_le64(pb); // avg frametime in 100ns units
526 stream_ct = get_le16(pb); //stream-name-count
527 payload_ext_ct = get_le16(pb); //payload-extension-system-count
529 if (stream_num < 128)
530 bitrate[stream_num] = leak_rate;
532 for (i=0; i<stream_ct; i++){
534 ext_len = get_le16(pb);
535 url_fseek(pb, ext_len, SEEK_CUR);
538 for (i=0; i<payload_ext_ct; i++){
541 ext_len=get_le32(pb);
542 url_fseek(pb, ext_len, SEEK_CUR);
545 // there could be a optional stream properties object to follow
546 // if so the next iteration will pick it up
548 } else if (!guidcmp(&g, &ff_asf_head1_guid)) {
554 } else if (!guidcmp(&g, &ff_asf_marker_header)) {
555 int i, count, name_len;
558 get_le64(pb); // reserved 16 bytes
560 count = get_le32(pb); // markers count
561 get_le16(pb); // reserved 2 bytes
562 name_len = get_le16(pb); // name length
563 for(i=0;i<name_len;i++){
564 get_byte(pb); // skip the name
567 for(i=0;i<count;i++){
571 get_le64(pb); // offset, 8 bytes
572 pres_time = get_le64(pb); // presentation time
573 get_le16(pb); // entry length
574 get_le32(pb); // send time
575 get_le32(pb); // flags
576 name_len = get_le32(pb); // name length
577 get_str16_nolen(pb, name_len * 2, name, sizeof(name));
578 ff_new_chapter(s, i, (AVRational){1, 10000000}, pres_time, AV_NOPTS_VALUE, name );
581 } else if (!guidcmp(&g, &ff_asf_codec_comment_header)) {
591 num = get_le16(pb); /* stream number */
592 get_str16(pb, str, sizeof(str));
593 get_str16(pb, str, sizeof(str));
598 if ((q - tag) < sizeof(tag) - 1)
605 } else if (url_feof(pb)) {
609 if (!guidcmp(&g, &ff_asf_content_encryption)) {
610 av_log(s, AV_LOG_WARNING, "DRM protected stream detected, decoding will likely fail!\n");
611 } else if (!guidcmp(&g, &ff_asf_ext_content_encryption)) {
612 av_log(s, AV_LOG_WARNING, "Ext DRM protected stream detected, decoding will likely fail!\n");
613 } else if (!guidcmp(&g, &ff_asf_digital_signature)) {
614 av_log(s, AV_LOG_WARNING, "Digital signature detected, decoding will likely fail!\n");
618 if(url_ftell(pb) != gpos + gsize)
619 av_log(s, AV_LOG_DEBUG, "gpos mismatch our pos=%"PRIu64", end=%"PRIu64"\n", url_ftell(pb)-gpos, gsize);
620 url_fseek(pb, gpos + gsize, SEEK_SET);
628 asf->data_offset = url_ftell(pb);
629 asf->packet_size_left = 0;
632 for(i=0; i<128; i++){
633 int stream_num= asf->asfid2avid[i];
635 AVStream *st = s->streams[stream_num];
636 if (!st->codec->bit_rate)
637 st->codec->bit_rate = bitrate[i];
638 if (dar[i].num > 0 && dar[i].den > 0){
639 av_reduce(&st->sample_aspect_ratio.num,
640 &st->sample_aspect_ratio.den,
641 dar[i].num, dar[i].den, INT_MAX);
642 } else if ((dar[0].num > 0) && (dar[0].den > 0) && (st->codec->codec_type==AVMEDIA_TYPE_VIDEO)) // Use ASF container value if the stream doesn't AR set.
643 av_reduce(&st->sample_aspect_ratio.num,
644 &st->sample_aspect_ratio.den,
645 dar[0].num, dar[0].den, INT_MAX);
647 //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);
649 // copy and convert language codes to the frontend
650 if (asf->streams[i].stream_language_index < 128) {
651 const char *rfc1766 = asf->stream_languages[asf->streams[i].stream_language_index];
652 if (rfc1766 && strlen(rfc1766) > 1) {
653 const char primary_tag[3] = { rfc1766[0], rfc1766[1], '\0' }; // ignore country code if any
654 const char *iso6392 = av_convert_lang_to(primary_tag, AV_LANG_ISO639_2_BIBL);
656 av_metadata_set2(&st->metadata, "language", iso6392, 0);
662 ff_metadata_conv(&s->metadata, NULL, ff_asf_metadata_conv);
667 #define DO_2BITS(bits, var, defval) \
670 case 3: var = get_le32(pb); rsize += 4; break; \
671 case 2: var = get_le16(pb); rsize += 2; break; \
672 case 1: var = get_byte(pb); rsize++; break; \
673 default: var = defval; break; \
677 * Load a single ASF packet into the demuxer.
678 * @param s demux context
679 * @param pb context to read data from
680 * @return 0 on success, <0 on error
682 static int ff_asf_get_packet(AVFormatContext *s, ByteIOContext *pb)
684 ASFContext *asf = s->priv_data;
685 uint32_t packet_length, padsize;
689 // if we do not know packet size, allow skipping up to 32 kB
691 if (s->packet_size > 0)
692 off= (url_ftell(pb) - s->data_offset) % s->packet_size + 3;
698 if(c == 0x82 && !d && !e)
704 * This code allows handling of -EAGAIN at packet boundaries (i.e.
705 * if the packet sync code above triggers -EAGAIN). This does not
706 * imply complete -EAGAIN handling support at random positions in
709 if (url_ferror(pb) == AVERROR(EAGAIN))
710 return AVERROR(EAGAIN);
712 av_log(s, AV_LOG_ERROR, "ff asf bad header %x at:%"PRId64"\n", c, url_ftell(pb));
714 if ((c & 0x8f) == 0x82) {
717 av_log(s, AV_LOG_ERROR, "ff asf bad non zero\n");
724 url_fseek(pb, -1, SEEK_CUR); //FIXME
727 asf->packet_flags = c;
728 asf->packet_property = d;
730 DO_2BITS(asf->packet_flags >> 5, packet_length, s->packet_size);
731 DO_2BITS(asf->packet_flags >> 1, padsize, 0); // sequence ignored
732 DO_2BITS(asf->packet_flags >> 3, padsize, 0); // padding length
734 //the following checks prevent overflows and infinite loops
735 if(!packet_length || packet_length >= (1U<<29)){
736 av_log(s, AV_LOG_ERROR, "invalid packet_length %d at:%"PRId64"\n", packet_length, url_ftell(pb));
739 if(padsize >= packet_length){
740 av_log(s, AV_LOG_ERROR, "invalid padsize %d at:%"PRId64"\n", padsize, url_ftell(pb));
744 asf->packet_timestamp = get_le32(pb);
745 get_le16(pb); /* duration */
746 // rsize has at least 11 bytes which have to be present
748 if (asf->packet_flags & 0x01) {
749 asf->packet_segsizetype = get_byte(pb); rsize++;
750 asf->packet_segments = asf->packet_segsizetype & 0x3f;
752 asf->packet_segments = 1;
753 asf->packet_segsizetype = 0x80;
755 asf->packet_size_left = packet_length - padsize - rsize;
756 if (packet_length < asf->hdr.min_pktsize)
757 padsize += asf->hdr.min_pktsize - packet_length;
758 asf->packet_padsize = padsize;
759 dprintf(s, "packet: size=%d padsize=%d left=%d\n", s->packet_size, asf->packet_padsize, asf->packet_size_left);
765 * @return <0 if error
767 static int asf_read_frame_header(AVFormatContext *s, ByteIOContext *pb){
768 ASFContext *asf = s->priv_data;
770 int num = get_byte(pb);
773 asf->packet_segments--;
774 asf->packet_key_frame = num >> 7;
775 asf->stream_index = asf->asfid2avid[num & 0x7f];
776 // sequence should be ignored!
777 DO_2BITS(asf->packet_property >> 4, asf->packet_seq, 0);
778 DO_2BITS(asf->packet_property >> 2, asf->packet_frag_offset, 0);
779 DO_2BITS(asf->packet_property, asf->packet_replic_size, 0);
780 //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);
781 if (asf->packet_replic_size >= 8) {
782 asf->packet_obj_size = get_le32(pb);
783 if(asf->packet_obj_size >= (1<<24) || asf->packet_obj_size <= 0){
784 av_log(s, AV_LOG_ERROR, "packet_obj_size invalid\n");
787 asf->packet_frag_timestamp = get_le32(pb); // timestamp
788 if(asf->packet_replic_size >= 8+38+4){
789 // for(i=0; i<asf->packet_replic_size-8; i++)
790 // av_log(s, AV_LOG_DEBUG, "%02X ",get_byte(pb));
791 // av_log(s, AV_LOG_DEBUG, "\n");
797 url_fskip(pb, asf->packet_replic_size - 8 - 38 - 4);
798 if(ts0!= -1) asf->packet_frag_timestamp= ts0/10000;
799 else asf->packet_frag_timestamp= AV_NOPTS_VALUE;
801 url_fskip(pb, asf->packet_replic_size - 8);
802 rsize += asf->packet_replic_size; // FIXME - check validity
803 } else if (asf->packet_replic_size==1){
804 // multipacket - frag_offset is beginning timestamp
805 asf->packet_time_start = asf->packet_frag_offset;
806 asf->packet_frag_offset = 0;
807 asf->packet_frag_timestamp = asf->packet_timestamp;
809 asf->packet_time_delta = get_byte(pb);
811 }else if(asf->packet_replic_size!=0){
812 av_log(s, AV_LOG_ERROR, "unexpected packet_replic_size of %d\n", asf->packet_replic_size);
815 if (asf->packet_flags & 0x01) {
816 DO_2BITS(asf->packet_segsizetype >> 6, asf->packet_frag_size, 0); // 0 is illegal
817 if(asf->packet_frag_size > asf->packet_size_left - rsize){
818 av_log(s, AV_LOG_ERROR, "packet_frag_size is invalid\n");
821 //printf("Fragsize %d\n", asf->packet_frag_size);
823 asf->packet_frag_size = asf->packet_size_left - rsize;
824 //printf("Using rest %d %d %d\n", asf->packet_frag_size, asf->packet_size_left, rsize);
826 if (asf->packet_replic_size == 1) {
827 asf->packet_multi_size = asf->packet_frag_size;
828 if (asf->packet_multi_size > asf->packet_size_left)
831 asf->packet_size_left -= rsize;
832 //printf("___objsize____ %d %d rs:%d\n", asf->packet_obj_size, asf->packet_frag_offset, rsize);
838 * Parse data from individual ASF packets (which were previously loaded
839 * with asf_get_packet()).
840 * @param s demux context
841 * @param pb context to read data from
842 * @param pkt pointer to store packet data into
843 * @return 0 if data was stored in pkt, <0 on error or 1 if more ASF
844 * packets need to be loaded (through asf_get_packet())
846 static int ff_asf_parse_packet(AVFormatContext *s, ByteIOContext *pb, AVPacket *pkt)
848 ASFContext *asf = s->priv_data;
849 ASFStream *asf_st = 0;
854 if (asf->packet_size_left < FRAME_HEADER_SIZE
855 || asf->packet_segments < 1) {
856 //asf->packet_size_left <= asf->packet_padsize) {
857 int ret = asf->packet_size_left + asf->packet_padsize;
858 //printf("PacketLeftSize:%d Pad:%d Pos:%"PRId64"\n", asf->packet_size_left, asf->packet_padsize, url_ftell(pb));
863 asf->packet_pos= url_ftell(pb);
864 if (asf->data_object_size != (uint64_t)-1 &&
865 (asf->packet_pos - asf->data_object_offset >= asf->data_object_size))
866 return AVERROR_EOF; /* Do not exceed the size of the data object */
869 if (asf->packet_time_start == 0) {
870 if(asf_read_frame_header(s, pb) < 0){
871 asf->packet_segments= 0;
874 if (asf->stream_index < 0
875 || s->streams[asf->stream_index]->discard >= AVDISCARD_ALL
876 || (!asf->packet_key_frame && s->streams[asf->stream_index]->discard >= AVDISCARD_NONKEY)
878 asf->packet_time_start = 0;
879 /* unhandled packet (should not happen) */
880 url_fskip(pb, asf->packet_frag_size);
881 asf->packet_size_left -= asf->packet_frag_size;
882 if(asf->stream_index < 0)
883 av_log(s, AV_LOG_ERROR, "ff asf skip %d (unknown stream)\n", asf->packet_frag_size);
886 asf->asf_st = s->streams[asf->stream_index]->priv_data;
888 asf_st = asf->asf_st;
890 if (asf->packet_replic_size == 1) {
891 // frag_offset is here used as the beginning timestamp
892 asf->packet_frag_timestamp = asf->packet_time_start;
893 asf->packet_time_start += asf->packet_time_delta;
894 asf->packet_obj_size = asf->packet_frag_size = get_byte(pb);
895 asf->packet_size_left--;
896 asf->packet_multi_size--;
897 if (asf->packet_multi_size < asf->packet_obj_size)
899 asf->packet_time_start = 0;
900 url_fskip(pb, asf->packet_multi_size);
901 asf->packet_size_left -= asf->packet_multi_size;
904 asf->packet_multi_size -= asf->packet_obj_size;
905 //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);
907 if( /*asf->packet_frag_size == asf->packet_obj_size*/
908 asf_st->frag_offset + asf->packet_frag_size <= asf_st->pkt.size
909 && asf_st->frag_offset + asf->packet_frag_size > asf->packet_obj_size){
910 av_log(s, AV_LOG_INFO, "ignoring invalid packet_obj_size (%d %d %d %d)\n",
911 asf_st->frag_offset, asf->packet_frag_size,
912 asf->packet_obj_size, asf_st->pkt.size);
913 asf->packet_obj_size= asf_st->pkt.size;
916 if ( asf_st->pkt.size != asf->packet_obj_size
917 || asf_st->frag_offset + asf->packet_frag_size > asf_st->pkt.size) { //FIXME is this condition sufficient?
918 if(asf_st->pkt.data){
919 av_log(s, AV_LOG_INFO, "freeing incomplete packet size %d, new %d\n", asf_st->pkt.size, asf->packet_obj_size);
920 asf_st->frag_offset = 0;
921 av_free_packet(&asf_st->pkt);
924 av_new_packet(&asf_st->pkt, asf->packet_obj_size);
925 asf_st->seq = asf->packet_seq;
926 asf_st->pkt.dts = asf->packet_frag_timestamp;
927 asf_st->pkt.stream_index = asf->stream_index;
929 asf_st->packet_pos= asf->packet_pos;
930 //printf("new packet: stream:%d key:%d packet_key:%d audio:%d size:%d\n",
931 //asf->stream_index, asf->packet_key_frame, asf_st->pkt.flags & AV_PKT_FLAG_KEY,
932 //s->streams[asf->stream_index]->codec->codec_type == AVMEDIA_TYPE_AUDIO, asf->packet_obj_size);
933 if (s->streams[asf->stream_index]->codec->codec_type == AVMEDIA_TYPE_AUDIO)
934 asf->packet_key_frame = 1;
935 if (asf->packet_key_frame)
936 asf_st->pkt.flags |= AV_PKT_FLAG_KEY;
940 //printf("READ PACKET s:%d os:%d o:%d,%d l:%d DATA:%p\n",
941 // s->packet_size, asf_st->pkt.size, asf->packet_frag_offset,
942 // asf_st->frag_offset, asf->packet_frag_size, asf_st->pkt.data);
943 asf->packet_size_left -= asf->packet_frag_size;
944 if (asf->packet_size_left < 0)
947 if( asf->packet_frag_offset >= asf_st->pkt.size
948 || asf->packet_frag_size > asf_st->pkt.size - asf->packet_frag_offset){
949 av_log(s, AV_LOG_ERROR, "packet fragment position invalid %u,%u not in %u\n",
950 asf->packet_frag_offset, asf->packet_frag_size, asf_st->pkt.size);
954 ret = get_buffer(pb, asf_st->pkt.data + asf->packet_frag_offset,
955 asf->packet_frag_size);
956 if (ret != asf->packet_frag_size)
957 return ret >= 0 ? AVERROR_EOF : ret;
958 if (s->key && s->keylen == 20)
959 ff_asfcrypt_dec(s->key, asf_st->pkt.data + asf->packet_frag_offset,
960 asf->packet_frag_size);
961 asf_st->frag_offset += asf->packet_frag_size;
962 /* test if whole packet is read */
963 if (asf_st->frag_offset == asf_st->pkt.size) {
964 //workaround for macroshit radio DVR-MS files
965 if( s->streams[asf->stream_index]->codec->codec_id == CODEC_ID_MPEG2VIDEO
966 && asf_st->pkt.size > 100){
968 for(i=0; i<asf_st->pkt.size && !asf_st->pkt.data[i]; i++);
969 if(i == asf_st->pkt.size){
970 av_log(s, AV_LOG_DEBUG, "discarding ms fart\n");
971 asf_st->frag_offset = 0;
972 av_free_packet(&asf_st->pkt);
978 if (asf_st->ds_span > 1) {
979 if(asf_st->pkt.size != asf_st->ds_packet_size * asf_st->ds_span){
980 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);
982 /* packet descrambling */
983 uint8_t *newdata = av_malloc(asf_st->pkt.size + FF_INPUT_BUFFER_PADDING_SIZE);
986 memset(newdata + asf_st->pkt.size, 0, FF_INPUT_BUFFER_PADDING_SIZE);
987 while (offset < asf_st->pkt.size) {
988 int off = offset / asf_st->ds_chunk_size;
989 int row = off / asf_st->ds_span;
990 int col = off % asf_st->ds_span;
991 int idx = row + col * asf_st->ds_packet_size / asf_st->ds_chunk_size;
992 //printf("off:%d row:%d col:%d idx:%d\n", off, row, col, idx);
994 assert(offset + asf_st->ds_chunk_size <= asf_st->pkt.size);
995 assert(idx+1 <= asf_st->pkt.size / asf_st->ds_chunk_size);
996 memcpy(newdata + offset,
997 asf_st->pkt.data + idx * asf_st->ds_chunk_size,
998 asf_st->ds_chunk_size);
999 offset += asf_st->ds_chunk_size;
1001 av_free(asf_st->pkt.data);
1002 asf_st->pkt.data = newdata;
1006 asf_st->frag_offset = 0;
1008 //printf("packet %d %d\n", asf_st->pkt.size, asf->packet_frag_size);
1009 asf_st->pkt.size = 0;
1010 asf_st->pkt.data = 0;
1011 break; // packet completed
1017 static int asf_read_packet(AVFormatContext *s, AVPacket *pkt)
1019 ASFContext *asf = s->priv_data;
1024 /* parse cached packets, if any */
1025 if ((ret = ff_asf_parse_packet(s, s->pb, pkt)) <= 0)
1027 if ((ret = ff_asf_get_packet(s, s->pb)) < 0)
1028 assert(asf->packet_size_left < FRAME_HEADER_SIZE || asf->packet_segments < 1);
1029 asf->packet_time_start = 0;
1035 // Added to support seeking after packets have been read
1036 // If information is not reset, read_packet fails due to
1037 // leftover information from previous reads
1038 static void asf_reset_header(AVFormatContext *s)
1040 ASFContext *asf = s->priv_data;
1044 asf->packet_nb_frames = 0;
1045 asf->packet_size_left = 0;
1046 asf->packet_segments = 0;
1047 asf->packet_flags = 0;
1048 asf->packet_property = 0;
1049 asf->packet_timestamp = 0;
1050 asf->packet_segsizetype = 0;
1051 asf->packet_segments = 0;
1052 asf->packet_seq = 0;
1053 asf->packet_replic_size = 0;
1054 asf->packet_key_frame = 0;
1055 asf->packet_padsize = 0;
1056 asf->packet_frag_offset = 0;
1057 asf->packet_frag_size = 0;
1058 asf->packet_frag_timestamp = 0;
1059 asf->packet_multi_size = 0;
1060 asf->packet_obj_size = 0;
1061 asf->packet_time_delta = 0;
1062 asf->packet_time_start = 0;
1064 for(i=0; i<s->nb_streams; i++){
1065 asf_st= s->streams[i]->priv_data;
1066 av_free_packet(&asf_st->pkt);
1067 asf_st->frag_offset=0;
1073 static int asf_read_close(AVFormatContext *s)
1077 asf_reset_header(s);
1078 for(i=0;i<s->nb_streams;i++) {
1079 AVStream *st = s->streams[i];
1080 av_free(st->codec->palctrl);
1085 static int64_t asf_read_pts(AVFormatContext *s, int stream_index, int64_t *ppos, int64_t pos_limit)
1087 AVPacket pkt1, *pkt = &pkt1;
1092 int64_t start_pos[ASF_MAX_STREAMS];
1094 for(i=0; i<s->nb_streams; i++){
1098 if (s->packet_size > 0)
1099 pos= (pos+s->packet_size-1-s->data_offset)/s->packet_size*s->packet_size+ s->data_offset;
1101 url_fseek(s->pb, pos, SEEK_SET);
1103 //printf("asf_read_pts\n");
1104 asf_reset_header(s);
1106 if (av_read_frame(s, pkt) < 0){
1107 av_log(s, AV_LOG_INFO, "asf_read_pts failed\n");
1108 return AV_NOPTS_VALUE;
1113 av_free_packet(pkt);
1114 if(pkt->flags&AV_PKT_FLAG_KEY){
1115 i= pkt->stream_index;
1117 asf_st= s->streams[i]->priv_data;
1119 // assert((asf_st->packet_pos - s->data_offset) % s->packet_size == 0);
1120 pos= asf_st->packet_pos;
1122 av_add_index_entry(s->streams[i], pos, pts, pkt->size, pos - start_pos[i] + 1, AVINDEX_KEYFRAME);
1123 start_pos[i]= asf_st->packet_pos + 1;
1125 if(pkt->stream_index == stream_index)
1131 //printf("found keyframe at %"PRId64" stream %d stamp:%"PRId64"\n", *ppos, stream_index, pts);
1136 static void asf_build_simple_index(AVFormatContext *s, int stream_index)
1139 ASFContext *asf = s->priv_data;
1140 int64_t current_pos= url_ftell(s->pb);
1143 url_fseek(s->pb, asf->data_object_offset + asf->data_object_size, SEEK_SET);
1144 get_guid(s->pb, &g);
1146 /* the data object can be followed by other top-level objects,
1147 skip them until the simple index object is reached */
1148 while (guidcmp(&g, &index_guid)) {
1149 int64_t gsize= get_le64(s->pb);
1150 if (gsize < 24 || url_feof(s->pb)) {
1151 url_fseek(s->pb, current_pos, SEEK_SET);
1154 url_fseek(s->pb, gsize-24, SEEK_CUR);
1155 get_guid(s->pb, &g);
1159 int64_t itime, last_pos=-1;
1161 int64_t av_unused gsize= get_le64(s->pb);
1162 get_guid(s->pb, &g);
1163 itime=get_le64(s->pb);
1164 pct=get_le32(s->pb);
1165 ict=get_le32(s->pb);
1166 av_log(s, AV_LOG_DEBUG, "itime:0x%"PRIx64", pct:%d, ict:%d\n",itime,pct,ict);
1168 for (i=0;i<ict;i++){
1169 int pktnum=get_le32(s->pb);
1170 int pktct =get_le16(s->pb);
1171 int64_t pos = s->data_offset + s->packet_size*(int64_t)pktnum;
1172 int64_t index_pts= av_rescale(itime, i, 10000);
1174 if(pos != last_pos){
1175 av_log(s, AV_LOG_DEBUG, "pktnum:%d, pktct:%d\n", pktnum, pktct);
1176 av_add_index_entry(s->streams[stream_index], pos, index_pts, s->packet_size, 0, AVINDEX_KEYFRAME);
1182 url_fseek(s->pb, current_pos, SEEK_SET);
1185 static int asf_read_seek(AVFormatContext *s, int stream_index, int64_t pts, int flags)
1187 ASFContext *asf = s->priv_data;
1188 AVStream *st = s->streams[stream_index];
1192 if (s->packet_size <= 0)
1195 /* Try using the protocol's read_seek if available */
1197 int ret = av_url_read_fseek(s->pb, stream_index, pts, flags);
1199 asf_reset_header(s);
1200 if (ret != AVERROR(ENOSYS))
1204 if (!asf->index_read)
1205 asf_build_simple_index(s, stream_index);
1207 if(!(asf->index_read && st->index_entries)){
1208 if(av_seek_frame_binary(s, stream_index, pts, flags)<0)
1211 index= av_index_search_timestamp(st, pts, flags);
1215 /* find the position */
1216 pos = st->index_entries[index].pos;
1218 // various attempts to find key frame have failed so far
1219 // asf_reset_header(s);
1220 // url_fseek(s->pb, pos, SEEK_SET);
1222 // for(i=0;i<16;i++){
1223 // pos = url_ftell(s->pb);
1224 // if (av_read_frame(s, &pkt) < 0){
1225 // av_log(s, AV_LOG_INFO, "seek failed\n");
1228 // asf_st = s->streams[stream_index]->priv_data;
1229 // pos += st->parser->frame_offset;
1231 // if (pkt.size > b) {
1236 // av_free_packet(&pkt);
1240 av_log(s, AV_LOG_DEBUG, "SEEKTO: %"PRId64"\n", pos);
1241 url_fseek(s->pb, pos, SEEK_SET);
1243 asf_reset_header(s);
1247 AVInputFormat asf_demuxer = {
1249 NULL_IF_CONFIG_SMALL("ASF format"),