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_command_stream)) {
279 type = AVMEDIA_TYPE_DATA;
280 } else if (!guidcmp(&g, &ff_asf_ext_stream_embed_stream_header)) {
281 test_for_ext_stream_audio = 1;
282 type = AVMEDIA_TYPE_UNKNOWN;
287 total_size = get_le64(pb);
288 type_specific_size = get_le32(pb);
290 st->id = get_le16(pb) & 0x7f; /* stream id */
291 // mapping of asf ID to AV stream ID;
292 asf->asfid2avid[st->id] = s->nb_streams - 1;
296 if (test_for_ext_stream_audio) {
298 if (!guidcmp(&g, &ff_asf_ext_stream_audio_stream)) {
299 type = AVMEDIA_TYPE_AUDIO;
310 st->codec->codec_type = type;
311 if (type == AVMEDIA_TYPE_AUDIO) {
312 ff_get_wav_header(pb, st->codec, type_specific_size);
313 if (is_dvr_ms_audio) {
314 // codec_id and codec_tag are unreliable in dvr_ms
315 // files. Set them later by probing stream.
316 st->codec->codec_id = CODEC_ID_PROBE;
317 st->codec->codec_tag = 0;
319 if (st->codec->codec_id == CODEC_ID_AAC) {
320 st->need_parsing = AVSTREAM_PARSE_NONE;
322 st->need_parsing = AVSTREAM_PARSE_FULL;
324 /* We have to init the frame size at some point .... */
325 pos2 = url_ftell(pb);
326 if (gsize >= (pos2 + 8 - pos1 + 24)) {
327 asf_st->ds_span = get_byte(pb);
328 asf_st->ds_packet_size = get_le16(pb);
329 asf_st->ds_chunk_size = get_le16(pb);
330 get_le16(pb); //ds_data_size
331 get_byte(pb); //ds_silence_data
333 //printf("Descrambling: ps:%d cs:%d ds:%d s:%d sd:%d\n",
334 // asf_st->ds_packet_size, asf_st->ds_chunk_size,
335 // asf_st->ds_data_size, asf_st->ds_span, asf_st->ds_silence_data);
336 if (asf_st->ds_span > 1) {
337 if (!asf_st->ds_chunk_size
338 || (asf_st->ds_packet_size/asf_st->ds_chunk_size <= 1)
339 || asf_st->ds_packet_size % asf_st->ds_chunk_size)
340 asf_st->ds_span = 0; // disable descrambling
342 switch (st->codec->codec_id) {
344 st->codec->frame_size = MPA_FRAME_SIZE;
346 case CODEC_ID_PCM_S16LE:
347 case CODEC_ID_PCM_S16BE:
348 case CODEC_ID_PCM_U16LE:
349 case CODEC_ID_PCM_U16BE:
350 case CODEC_ID_PCM_S8:
351 case CODEC_ID_PCM_U8:
352 case CODEC_ID_PCM_ALAW:
353 case CODEC_ID_PCM_MULAW:
354 st->codec->frame_size = 1;
357 /* This is probably wrong, but it prevents a crash later */
358 st->codec->frame_size = 1;
361 } else if (type == AVMEDIA_TYPE_VIDEO) {
365 size = get_le16(pb); /* size */
366 sizeX= get_le32(pb); /* size */
367 st->codec->width = get_le32(pb);
368 st->codec->height = get_le32(pb);
369 /* not available for asf */
370 get_le16(pb); /* panes */
371 st->codec->bits_per_coded_sample = get_le16(pb); /* depth */
374 // av_log(s, AV_LOG_DEBUG, "size:%d tsize:%d sizeX:%d\n", size, total_size, sizeX);
377 st->codec->extradata_size = size - 40;
378 st->codec->extradata = av_mallocz(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
379 get_buffer(pb, st->codec->extradata, st->codec->extradata_size);
382 /* Extract palette from extradata if bpp <= 8 */
383 /* This code assumes that extradata contains only palette */
384 /* This is true for all paletted codecs implemented in ffmpeg */
385 if (st->codec->extradata_size && (st->codec->bits_per_coded_sample <= 8)) {
386 st->codec->palctrl = av_mallocz(sizeof(AVPaletteControl));
388 for (i = 0; i < FFMIN(st->codec->extradata_size, AVPALETTE_SIZE)/4; i++)
389 st->codec->palctrl->palette[i] = bswap_32(((uint32_t*)st->codec->extradata)[i]);
391 memcpy(st->codec->palctrl->palette, st->codec->extradata,
392 FFMIN(st->codec->extradata_size, AVPALETTE_SIZE));
394 st->codec->palctrl->palette_changed = 1;
397 st->codec->codec_tag = tag1;
398 st->codec->codec_id = ff_codec_get_id(ff_codec_bmp_tags, tag1);
399 if(tag1 == MKTAG('D', 'V', 'R', ' '))
400 st->need_parsing = AVSTREAM_PARSE_FULL;
401 if(st->codec->codec_id == CODEC_ID_H264)
402 st->need_parsing = AVSTREAM_PARSE_FULL_ONCE;
404 pos2 = url_ftell(pb);
405 url_fskip(pb, gsize - (pos2 - pos1 + 24));
406 } else if (!guidcmp(&g, &ff_asf_comment_header)) {
407 int len1, len2, len3, len4, len5;
414 get_tag(s, "title" , 0, len1);
415 get_tag(s, "author" , 0, len2);
416 get_tag(s, "copyright", 0, len3);
417 get_tag(s, "comment" , 0, len4);
419 } else if (!guidcmp(&g, &stream_bitrate_guid)) {
420 int stream_count = get_le16(pb);
423 // av_log(s, AV_LOG_ERROR, "stream bitrate properties\n");
424 // av_log(s, AV_LOG_ERROR, "streams %d\n", streams);
425 for(j = 0; j < stream_count; j++) {
426 int flags, bitrate, stream_id;
429 bitrate= get_le32(pb);
430 stream_id= (flags & 0x7f);
431 // av_log(s, AV_LOG_ERROR, "flags: 0x%x stream id %d, bitrate %d\n", flags, stream_id, bitrate);
432 asf->stream_bitrates[stream_id]= bitrate;
434 } else if (!guidcmp(&g, &ff_asf_language_guid)) {
436 int stream_count = get_le16(pb);
437 for(j = 0; j < stream_count; j++) {
439 unsigned int lang_len = get_byte(pb);
440 get_str16_nolen(pb, lang_len, lang, sizeof(lang));
442 av_strlcpy(asf->stream_languages[j], lang, sizeof(*asf->stream_languages));
444 } else if (!guidcmp(&g, &ff_asf_extended_content_header)) {
447 desc_count = get_le16(pb);
448 for(i=0;i<desc_count;i++) {
449 int name_len,value_type,value_len;
452 name_len = get_le16(pb);
453 if (name_len%2) // must be even, broken lavf versions wrote len-1
455 get_str16_nolen(pb, name_len, name, sizeof(name));
456 value_type = get_le16(pb);
457 value_len = get_le16(pb);
458 if (!value_type && value_len%2)
460 get_tag(s, name, value_type, value_len);
462 } else if (!guidcmp(&g, &ff_asf_metadata_header)) {
463 int n, stream_num, name_len, value_len, value_type, value_num;
469 get_le16(pb); //lang_list_index
470 stream_num= get_le16(pb);
471 name_len= get_le16(pb);
472 value_type= get_le16(pb);
473 value_len= get_le32(pb);
475 get_str16_nolen(pb, name_len, name, sizeof(name));
476 //av_log(s, AV_LOG_ERROR, "%d %d %d %d %d <%s>\n", i, stream_num, name_len, value_type, value_len, name);
477 value_num= get_le16(pb);//we should use get_value() here but it does not work 2 is le16 here but le32 elsewhere
478 url_fskip(pb, value_len - 2);
481 if (!strcmp(name, "AspectRatioX")) dar[stream_num].num= value_num;
482 else if(!strcmp(name, "AspectRatioY")) dar[stream_num].den= value_num;
485 } else if (!guidcmp(&g, &ff_asf_ext_stream_header)) {
486 int ext_len, payload_ext_ct, stream_ct;
487 uint32_t ext_d, leak_rate, stream_num;
488 unsigned int stream_languageid_index;
490 get_le64(pb); // starttime
491 get_le64(pb); // endtime
492 leak_rate = get_le32(pb); // leak-datarate
493 get_le32(pb); // bucket-datasize
494 get_le32(pb); // init-bucket-fullness
495 get_le32(pb); // alt-leak-datarate
496 get_le32(pb); // alt-bucket-datasize
497 get_le32(pb); // alt-init-bucket-fullness
498 get_le32(pb); // max-object-size
499 get_le32(pb); // flags (reliable,seekable,no_cleanpoints?,resend-live-cleanpoints, rest of bits reserved)
500 stream_num = get_le16(pb); // stream-num
502 stream_languageid_index = get_le16(pb); // stream-language-id-index
503 if (stream_num < 128)
504 asf->streams[stream_num].stream_language_index = stream_languageid_index;
506 get_le64(pb); // avg frametime in 100ns units
507 stream_ct = get_le16(pb); //stream-name-count
508 payload_ext_ct = get_le16(pb); //payload-extension-system-count
510 if (stream_num < 128)
511 bitrate[stream_num] = leak_rate;
513 for (i=0; i<stream_ct; i++){
515 ext_len = get_le16(pb);
516 url_fseek(pb, ext_len, SEEK_CUR);
519 for (i=0; i<payload_ext_ct; i++){
522 ext_len=get_le32(pb);
523 url_fseek(pb, ext_len, SEEK_CUR);
526 // there could be a optional stream properties object to follow
527 // if so the next iteration will pick it up
529 } else if (!guidcmp(&g, &ff_asf_head1_guid)) {
535 } else if (!guidcmp(&g, &ff_asf_marker_header)) {
536 int i, count, name_len;
539 get_le64(pb); // reserved 16 bytes
541 count = get_le32(pb); // markers count
542 get_le16(pb); // reserved 2 bytes
543 name_len = get_le16(pb); // name length
544 for(i=0;i<name_len;i++){
545 get_byte(pb); // skip the name
548 for(i=0;i<count;i++){
552 get_le64(pb); // offset, 8 bytes
553 pres_time = get_le64(pb); // presentation time
554 get_le16(pb); // entry length
555 get_le32(pb); // send time
556 get_le32(pb); // flags
557 name_len = get_le32(pb); // name length
558 get_str16_nolen(pb, name_len * 2, name, sizeof(name));
559 ff_new_chapter(s, i, (AVRational){1, 10000000}, pres_time, AV_NOPTS_VALUE, name );
562 } else if (!guidcmp(&g, &ff_asf_codec_comment_header)) {
572 num = get_le16(pb); /* stream number */
573 get_str16(pb, str, sizeof(str));
574 get_str16(pb, str, sizeof(str));
579 if ((q - tag) < sizeof(tag) - 1)
586 } else if (url_feof(pb)) {
590 if (!guidcmp(&g, &ff_asf_content_encryption)) {
591 av_log(s, AV_LOG_WARNING, "DRM protected stream detected, decoding will likely fail!\n");
592 } else if (!guidcmp(&g, &ff_asf_ext_content_encryption)) {
593 av_log(s, AV_LOG_WARNING, "Ext DRM protected stream detected, decoding will likely fail!\n");
594 } else if (!guidcmp(&g, &ff_asf_digital_signature)) {
595 av_log(s, AV_LOG_WARNING, "Digital signature detected, decoding will likely fail!\n");
599 if(url_ftell(pb) != gpos + gsize)
600 av_log(s, AV_LOG_DEBUG, "gpos mismatch our pos=%"PRIu64", end=%"PRIu64"\n", url_ftell(pb)-gpos, gsize);
601 url_fseek(pb, gpos + gsize, SEEK_SET);
609 asf->data_offset = url_ftell(pb);
610 asf->packet_size_left = 0;
613 for(i=0; i<128; i++){
614 int stream_num= asf->asfid2avid[i];
616 AVStream *st = s->streams[stream_num];
617 if (!st->codec->bit_rate)
618 st->codec->bit_rate = bitrate[i];
619 if (dar[i].num > 0 && dar[i].den > 0)
620 av_reduce(&st->sample_aspect_ratio.num,
621 &st->sample_aspect_ratio.den,
622 dar[i].num, dar[i].den, INT_MAX);
623 //av_log(s, AV_LOG_ERROR, "dar %d:%d sar=%d:%d\n", dar[i].num, dar[i].den, st->sample_aspect_ratio.num, st->sample_aspect_ratio.den);
625 // copy and convert language codes to the frontend
626 if (asf->streams[i].stream_language_index < 128) {
627 const char *rfc1766 = asf->stream_languages[asf->streams[i].stream_language_index];
628 if (rfc1766 && strlen(rfc1766) > 1) {
629 const char primary_tag[3] = { rfc1766[0], rfc1766[1], '\0' }; // ignore country code if any
630 const char *iso6392 = av_convert_lang_to(primary_tag, AV_LANG_ISO639_2_BIBL);
632 av_metadata_set2(&st->metadata, "language", iso6392, 0);
641 #define DO_2BITS(bits, var, defval) \
644 case 3: var = get_le32(pb); rsize += 4; break; \
645 case 2: var = get_le16(pb); rsize += 2; break; \
646 case 1: var = get_byte(pb); rsize++; break; \
647 default: var = defval; break; \
651 * Load a single ASF packet into the demuxer.
652 * @param s demux context
653 * @param pb context to read data from
654 * @return 0 on success, <0 on error
656 static int ff_asf_get_packet(AVFormatContext *s, ByteIOContext *pb)
658 ASFContext *asf = s->priv_data;
659 uint32_t packet_length, padsize;
663 // if we do not know packet size, allow skipping up to 32 kB
665 if (s->packet_size > 0)
666 off= (url_ftell(pb) - s->data_offset) % s->packet_size + 3;
672 if(c == 0x82 && !d && !e)
678 * This code allows handling of -EAGAIN at packet boundaries (i.e.
679 * if the packet sync code above triggers -EAGAIN). This does not
680 * imply complete -EAGAIN handling support at random positions in
683 if (url_ferror(pb) == AVERROR(EAGAIN))
684 return AVERROR(EAGAIN);
686 av_log(s, AV_LOG_ERROR, "ff asf bad header %x at:%"PRId64"\n", c, url_ftell(pb));
688 if ((c & 0x8f) == 0x82) {
691 av_log(s, AV_LOG_ERROR, "ff asf bad non zero\n");
698 url_fseek(pb, -1, SEEK_CUR); //FIXME
701 asf->packet_flags = c;
702 asf->packet_property = d;
704 DO_2BITS(asf->packet_flags >> 5, packet_length, s->packet_size);
705 DO_2BITS(asf->packet_flags >> 1, padsize, 0); // sequence ignored
706 DO_2BITS(asf->packet_flags >> 3, padsize, 0); // padding length
708 //the following checks prevent overflows and infinite loops
709 if(!packet_length || packet_length >= (1U<<29)){
710 av_log(s, AV_LOG_ERROR, "invalid packet_length %d at:%"PRId64"\n", packet_length, url_ftell(pb));
713 if(padsize >= packet_length){
714 av_log(s, AV_LOG_ERROR, "invalid padsize %d at:%"PRId64"\n", padsize, url_ftell(pb));
718 asf->packet_timestamp = get_le32(pb);
719 get_le16(pb); /* duration */
720 // rsize has at least 11 bytes which have to be present
722 if (asf->packet_flags & 0x01) {
723 asf->packet_segsizetype = get_byte(pb); rsize++;
724 asf->packet_segments = asf->packet_segsizetype & 0x3f;
726 asf->packet_segments = 1;
727 asf->packet_segsizetype = 0x80;
729 asf->packet_size_left = packet_length - padsize - rsize;
730 if (packet_length < asf->hdr.min_pktsize)
731 padsize += asf->hdr.min_pktsize - packet_length;
732 asf->packet_padsize = padsize;
733 dprintf(s, "packet: size=%d padsize=%d left=%d\n", s->packet_size, asf->packet_padsize, asf->packet_size_left);
739 * @return <0 if error
741 static int asf_read_frame_header(AVFormatContext *s, ByteIOContext *pb){
742 ASFContext *asf = s->priv_data;
744 int num = get_byte(pb);
747 asf->packet_segments--;
748 asf->packet_key_frame = num >> 7;
749 asf->stream_index = asf->asfid2avid[num & 0x7f];
750 // sequence should be ignored!
751 DO_2BITS(asf->packet_property >> 4, asf->packet_seq, 0);
752 DO_2BITS(asf->packet_property >> 2, asf->packet_frag_offset, 0);
753 DO_2BITS(asf->packet_property, asf->packet_replic_size, 0);
754 //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);
755 if (asf->packet_replic_size >= 8) {
756 asf->packet_obj_size = get_le32(pb);
757 if(asf->packet_obj_size >= (1<<24) || asf->packet_obj_size <= 0){
758 av_log(s, AV_LOG_ERROR, "packet_obj_size invalid\n");
761 asf->packet_frag_timestamp = get_le32(pb); // timestamp
762 if(asf->packet_replic_size >= 8+38+4){
763 // for(i=0; i<asf->packet_replic_size-8; i++)
764 // av_log(s, AV_LOG_DEBUG, "%02X ",get_byte(pb));
765 // av_log(s, AV_LOG_DEBUG, "\n");
771 url_fskip(pb, asf->packet_replic_size - 8 - 38 - 4);
772 if(ts0!= -1) asf->packet_frag_timestamp= ts0/10000;
773 else asf->packet_frag_timestamp= AV_NOPTS_VALUE;
775 url_fskip(pb, asf->packet_replic_size - 8);
776 rsize += asf->packet_replic_size; // FIXME - check validity
777 } else if (asf->packet_replic_size==1){
778 // multipacket - frag_offset is beginning timestamp
779 asf->packet_time_start = asf->packet_frag_offset;
780 asf->packet_frag_offset = 0;
781 asf->packet_frag_timestamp = asf->packet_timestamp;
783 asf->packet_time_delta = get_byte(pb);
785 }else if(asf->packet_replic_size!=0){
786 av_log(s, AV_LOG_ERROR, "unexpected packet_replic_size of %d\n", asf->packet_replic_size);
789 if (asf->packet_flags & 0x01) {
790 DO_2BITS(asf->packet_segsizetype >> 6, asf->packet_frag_size, 0); // 0 is illegal
791 if(asf->packet_frag_size > asf->packet_size_left - rsize){
792 av_log(s, AV_LOG_ERROR, "packet_frag_size is invalid\n");
795 //printf("Fragsize %d\n", asf->packet_frag_size);
797 asf->packet_frag_size = asf->packet_size_left - rsize;
798 //printf("Using rest %d %d %d\n", asf->packet_frag_size, asf->packet_size_left, rsize);
800 if (asf->packet_replic_size == 1) {
801 asf->packet_multi_size = asf->packet_frag_size;
802 if (asf->packet_multi_size > asf->packet_size_left)
805 asf->packet_size_left -= rsize;
806 //printf("___objsize____ %d %d rs:%d\n", asf->packet_obj_size, asf->packet_frag_offset, rsize);
812 * Parse data from individual ASF packets (which were previously loaded
813 * with asf_get_packet()).
814 * @param s demux context
815 * @param pb context to read data from
816 * @param pkt pointer to store packet data into
817 * @return 0 if data was stored in pkt, <0 on error or 1 if more ASF
818 * packets need to be loaded (through asf_get_packet())
820 static int ff_asf_parse_packet(AVFormatContext *s, ByteIOContext *pb, AVPacket *pkt)
822 ASFContext *asf = s->priv_data;
823 ASFStream *asf_st = 0;
827 if (asf->packet_size_left < FRAME_HEADER_SIZE
828 || asf->packet_segments < 1) {
829 //asf->packet_size_left <= asf->packet_padsize) {
830 int ret = asf->packet_size_left + asf->packet_padsize;
831 //printf("PacketLeftSize:%d Pad:%d Pos:%"PRId64"\n", asf->packet_size_left, asf->packet_padsize, url_ftell(pb));
836 asf->packet_pos= url_ftell(pb);
837 if (asf->data_object_size != (uint64_t)-1 &&
838 (asf->packet_pos - asf->data_object_offset >= asf->data_object_size))
839 return AVERROR_EOF; /* Do not exceed the size of the data object */
842 if (asf->packet_time_start == 0) {
843 if(asf_read_frame_header(s, pb) < 0){
844 asf->packet_segments= 0;
847 if (asf->stream_index < 0
848 || s->streams[asf->stream_index]->discard >= AVDISCARD_ALL
849 || (!asf->packet_key_frame && s->streams[asf->stream_index]->discard >= AVDISCARD_NONKEY)
851 asf->packet_time_start = 0;
852 /* unhandled packet (should not happen) */
853 url_fskip(pb, asf->packet_frag_size);
854 asf->packet_size_left -= asf->packet_frag_size;
855 if(asf->stream_index < 0)
856 av_log(s, AV_LOG_ERROR, "ff asf skip %d (unknown stream)\n", asf->packet_frag_size);
859 asf->asf_st = s->streams[asf->stream_index]->priv_data;
861 asf_st = asf->asf_st;
863 if (asf->packet_replic_size == 1) {
864 // frag_offset is here used as the beginning timestamp
865 asf->packet_frag_timestamp = asf->packet_time_start;
866 asf->packet_time_start += asf->packet_time_delta;
867 asf->packet_obj_size = asf->packet_frag_size = get_byte(pb);
868 asf->packet_size_left--;
869 asf->packet_multi_size--;
870 if (asf->packet_multi_size < asf->packet_obj_size)
872 asf->packet_time_start = 0;
873 url_fskip(pb, asf->packet_multi_size);
874 asf->packet_size_left -= asf->packet_multi_size;
877 asf->packet_multi_size -= asf->packet_obj_size;
878 //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);
880 if( /*asf->packet_frag_size == asf->packet_obj_size*/
881 asf_st->frag_offset + asf->packet_frag_size <= asf_st->pkt.size
882 && asf_st->frag_offset + asf->packet_frag_size > asf->packet_obj_size){
883 av_log(s, AV_LOG_INFO, "ignoring invalid packet_obj_size (%d %d %d %d)\n",
884 asf_st->frag_offset, asf->packet_frag_size,
885 asf->packet_obj_size, asf_st->pkt.size);
886 asf->packet_obj_size= asf_st->pkt.size;
889 if ( asf_st->pkt.size != asf->packet_obj_size
890 || asf_st->frag_offset + asf->packet_frag_size > asf_st->pkt.size) { //FIXME is this condition sufficient?
891 if(asf_st->pkt.data){
892 av_log(s, AV_LOG_INFO, "freeing incomplete packet size %d, new %d\n", asf_st->pkt.size, asf->packet_obj_size);
893 asf_st->frag_offset = 0;
894 av_free_packet(&asf_st->pkt);
897 av_new_packet(&asf_st->pkt, asf->packet_obj_size);
898 asf_st->seq = asf->packet_seq;
899 asf_st->pkt.dts = asf->packet_frag_timestamp;
900 asf_st->pkt.stream_index = asf->stream_index;
902 asf_st->packet_pos= asf->packet_pos;
903 //printf("new packet: stream:%d key:%d packet_key:%d audio:%d size:%d\n",
904 //asf->stream_index, asf->packet_key_frame, asf_st->pkt.flags & AV_PKT_FLAG_KEY,
905 //s->streams[asf->stream_index]->codec->codec_type == AVMEDIA_TYPE_AUDIO, asf->packet_obj_size);
906 if (s->streams[asf->stream_index]->codec->codec_type == AVMEDIA_TYPE_AUDIO)
907 asf->packet_key_frame = 1;
908 if (asf->packet_key_frame)
909 asf_st->pkt.flags |= AV_PKT_FLAG_KEY;
913 //printf("READ PACKET s:%d os:%d o:%d,%d l:%d DATA:%p\n",
914 // s->packet_size, asf_st->pkt.size, asf->packet_frag_offset,
915 // asf_st->frag_offset, asf->packet_frag_size, asf_st->pkt.data);
916 asf->packet_size_left -= asf->packet_frag_size;
917 if (asf->packet_size_left < 0)
920 if( asf->packet_frag_offset >= asf_st->pkt.size
921 || asf->packet_frag_size > asf_st->pkt.size - asf->packet_frag_offset){
922 av_log(s, AV_LOG_ERROR, "packet fragment position invalid %u,%u not in %u\n",
923 asf->packet_frag_offset, asf->packet_frag_size, asf_st->pkt.size);
927 get_buffer(pb, asf_st->pkt.data + asf->packet_frag_offset,
928 asf->packet_frag_size);
929 if (s->key && s->keylen == 20)
930 ff_asfcrypt_dec(s->key, asf_st->pkt.data + asf->packet_frag_offset,
931 asf->packet_frag_size);
932 asf_st->frag_offset += asf->packet_frag_size;
933 /* test if whole packet is read */
934 if (asf_st->frag_offset == asf_st->pkt.size) {
935 //workaround for macroshit radio DVR-MS files
936 if( s->streams[asf->stream_index]->codec->codec_id == CODEC_ID_MPEG2VIDEO
937 && asf_st->pkt.size > 100){
939 for(i=0; i<asf_st->pkt.size && !asf_st->pkt.data[i]; i++);
940 if(i == asf_st->pkt.size){
941 av_log(s, AV_LOG_DEBUG, "discarding ms fart\n");
942 asf_st->frag_offset = 0;
943 av_free_packet(&asf_st->pkt);
949 if (asf_st->ds_span > 1) {
950 if(asf_st->pkt.size != asf_st->ds_packet_size * asf_st->ds_span){
951 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);
953 /* packet descrambling */
954 uint8_t *newdata = av_malloc(asf_st->pkt.size);
957 while (offset < asf_st->pkt.size) {
958 int off = offset / asf_st->ds_chunk_size;
959 int row = off / asf_st->ds_span;
960 int col = off % asf_st->ds_span;
961 int idx = row + col * asf_st->ds_packet_size / asf_st->ds_chunk_size;
962 //printf("off:%d row:%d col:%d idx:%d\n", off, row, col, idx);
964 assert(offset + asf_st->ds_chunk_size <= asf_st->pkt.size);
965 assert(idx+1 <= asf_st->pkt.size / asf_st->ds_chunk_size);
966 memcpy(newdata + offset,
967 asf_st->pkt.data + idx * asf_st->ds_chunk_size,
968 asf_st->ds_chunk_size);
969 offset += asf_st->ds_chunk_size;
971 av_free(asf_st->pkt.data);
972 asf_st->pkt.data = newdata;
976 asf_st->frag_offset = 0;
978 //printf("packet %d %d\n", asf_st->pkt.size, asf->packet_frag_size);
979 asf_st->pkt.size = 0;
980 asf_st->pkt.data = 0;
981 break; // packet completed
987 static int asf_read_packet(AVFormatContext *s, AVPacket *pkt)
989 ASFContext *asf = s->priv_data;
994 /* parse cached packets, if any */
995 if ((ret = ff_asf_parse_packet(s, s->pb, pkt)) <= 0)
997 if ((ret = ff_asf_get_packet(s, s->pb)) < 0)
998 assert(asf->packet_size_left < FRAME_HEADER_SIZE || asf->packet_segments < 1);
999 asf->packet_time_start = 0;
1005 // Added to support seeking after packets have been read
1006 // If information is not reset, read_packet fails due to
1007 // leftover information from previous reads
1008 static void asf_reset_header(AVFormatContext *s)
1010 ASFContext *asf = s->priv_data;
1014 asf->packet_nb_frames = 0;
1015 asf->packet_size_left = 0;
1016 asf->packet_segments = 0;
1017 asf->packet_flags = 0;
1018 asf->packet_property = 0;
1019 asf->packet_timestamp = 0;
1020 asf->packet_segsizetype = 0;
1021 asf->packet_segments = 0;
1022 asf->packet_seq = 0;
1023 asf->packet_replic_size = 0;
1024 asf->packet_key_frame = 0;
1025 asf->packet_padsize = 0;
1026 asf->packet_frag_offset = 0;
1027 asf->packet_frag_size = 0;
1028 asf->packet_frag_timestamp = 0;
1029 asf->packet_multi_size = 0;
1030 asf->packet_obj_size = 0;
1031 asf->packet_time_delta = 0;
1032 asf->packet_time_start = 0;
1034 for(i=0; i<s->nb_streams; i++){
1035 asf_st= s->streams[i]->priv_data;
1036 av_free_packet(&asf_st->pkt);
1037 asf_st->frag_offset=0;
1043 static int asf_read_close(AVFormatContext *s)
1047 asf_reset_header(s);
1048 for(i=0;i<s->nb_streams;i++) {
1049 AVStream *st = s->streams[i];
1050 av_free(st->codec->palctrl);
1055 static int64_t asf_read_pts(AVFormatContext *s, int stream_index, int64_t *ppos, int64_t pos_limit)
1057 AVPacket pkt1, *pkt = &pkt1;
1062 int64_t start_pos[ASF_MAX_STREAMS];
1064 for(i=0; i<s->nb_streams; i++){
1068 if (s->packet_size > 0)
1069 pos= (pos+s->packet_size-1-s->data_offset)/s->packet_size*s->packet_size+ s->data_offset;
1071 url_fseek(s->pb, pos, SEEK_SET);
1073 //printf("asf_read_pts\n");
1074 asf_reset_header(s);
1076 if (av_read_frame(s, pkt) < 0){
1077 av_log(s, AV_LOG_INFO, "asf_read_pts failed\n");
1078 return AV_NOPTS_VALUE;
1083 av_free_packet(pkt);
1084 if(pkt->flags&AV_PKT_FLAG_KEY){
1085 i= pkt->stream_index;
1087 asf_st= s->streams[i]->priv_data;
1089 // assert((asf_st->packet_pos - s->data_offset) % s->packet_size == 0);
1090 pos= asf_st->packet_pos;
1092 av_add_index_entry(s->streams[i], pos, pts, pkt->size, pos - start_pos[i] + 1, AVINDEX_KEYFRAME);
1093 start_pos[i]= asf_st->packet_pos + 1;
1095 if(pkt->stream_index == stream_index)
1101 //printf("found keyframe at %"PRId64" stream %d stamp:%"PRId64"\n", *ppos, stream_index, pts);
1106 static void asf_build_simple_index(AVFormatContext *s, int stream_index)
1109 ASFContext *asf = s->priv_data;
1110 int64_t current_pos= url_ftell(s->pb);
1113 url_fseek(s->pb, asf->data_object_offset + asf->data_object_size, SEEK_SET);
1114 get_guid(s->pb, &g);
1115 if (!guidcmp(&g, &index_guid)) {
1116 int64_t itime, last_pos=-1;
1118 int64_t av_unused gsize= get_le64(s->pb);
1119 get_guid(s->pb, &g);
1120 itime=get_le64(s->pb);
1121 pct=get_le32(s->pb);
1122 ict=get_le32(s->pb);
1123 av_log(s, AV_LOG_DEBUG, "itime:0x%"PRIx64", pct:%d, ict:%d\n",itime,pct,ict);
1125 for (i=0;i<ict;i++){
1126 int pktnum=get_le32(s->pb);
1127 int pktct =get_le16(s->pb);
1128 int64_t pos = s->data_offset + s->packet_size*(int64_t)pktnum;
1129 int64_t index_pts= av_rescale(itime, i, 10000);
1131 if(pos != last_pos){
1132 av_log(s, AV_LOG_DEBUG, "pktnum:%d, pktct:%d\n", pktnum, pktct);
1133 av_add_index_entry(s->streams[stream_index], pos, index_pts, s->packet_size, 0, AVINDEX_KEYFRAME);
1139 url_fseek(s->pb, current_pos, SEEK_SET);
1142 static int asf_read_seek(AVFormatContext *s, int stream_index, int64_t pts, int flags)
1144 ASFContext *asf = s->priv_data;
1145 AVStream *st = s->streams[stream_index];
1149 if (s->packet_size <= 0)
1152 /* Try using the protocol's read_seek if available */
1154 int ret = av_url_read_fseek(s->pb, stream_index, pts, flags);
1156 asf_reset_header(s);
1157 if (ret != AVERROR(ENOSYS))
1161 if (!asf->index_read)
1162 asf_build_simple_index(s, stream_index);
1164 if(!(asf->index_read && st->index_entries)){
1165 if(av_seek_frame_binary(s, stream_index, pts, flags)<0)
1168 index= av_index_search_timestamp(st, pts, flags);
1172 /* find the position */
1173 pos = st->index_entries[index].pos;
1175 // various attempts to find key frame have failed so far
1176 // asf_reset_header(s);
1177 // url_fseek(s->pb, pos, SEEK_SET);
1179 // for(i=0;i<16;i++){
1180 // pos = url_ftell(s->pb);
1181 // if (av_read_frame(s, &pkt) < 0){
1182 // av_log(s, AV_LOG_INFO, "seek failed\n");
1185 // asf_st = s->streams[stream_index]->priv_data;
1186 // pos += st->parser->frame_offset;
1188 // if (pkt.size > b) {
1193 // av_free_packet(&pkt);
1197 av_log(s, AV_LOG_DEBUG, "SEEKTO: %"PRId64"\n", pos);
1198 url_fseek(s->pb, pos, SEEK_SET);
1200 asf_reset_header(s);
1204 AVInputFormat asf_demuxer = {
1206 NULL_IF_CONFIG_SMALL("ASF format"),
1214 .metadata_conv = ff_asf_metadata_conv,