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 /**********************************/
53 #define PRINT_IF_GUID(g,cmp) \
54 if (!ff_guidcmp(g, &cmp)) \
55 av_dlog(NULL, "(GUID: %s) ", #cmp)
57 static void print_guid(const ff_asf_guid *g)
60 PRINT_IF_GUID(g, ff_asf_header);
61 else PRINT_IF_GUID(g, ff_asf_file_header);
62 else PRINT_IF_GUID(g, ff_asf_stream_header);
63 else PRINT_IF_GUID(g, ff_asf_audio_stream);
64 else PRINT_IF_GUID(g, ff_asf_audio_conceal_none);
65 else PRINT_IF_GUID(g, ff_asf_video_stream);
66 else PRINT_IF_GUID(g, ff_asf_video_conceal_none);
67 else PRINT_IF_GUID(g, ff_asf_command_stream);
68 else PRINT_IF_GUID(g, ff_asf_comment_header);
69 else PRINT_IF_GUID(g, ff_asf_codec_comment_header);
70 else PRINT_IF_GUID(g, ff_asf_codec_comment1_header);
71 else PRINT_IF_GUID(g, ff_asf_data_header);
72 else PRINT_IF_GUID(g, index_guid);
73 else PRINT_IF_GUID(g, ff_asf_head1_guid);
74 else PRINT_IF_GUID(g, ff_asf_head2_guid);
75 else PRINT_IF_GUID(g, ff_asf_my_guid);
76 else PRINT_IF_GUID(g, ff_asf_ext_stream_header);
77 else PRINT_IF_GUID(g, ff_asf_extended_content_header);
78 else PRINT_IF_GUID(g, ff_asf_ext_stream_embed_stream_header);
79 else PRINT_IF_GUID(g, ff_asf_ext_stream_audio_stream);
80 else PRINT_IF_GUID(g, ff_asf_metadata_header);
81 else PRINT_IF_GUID(g, ff_asf_marker_header);
82 else PRINT_IF_GUID(g, stream_bitrate_guid);
83 else PRINT_IF_GUID(g, ff_asf_language_guid);
85 av_dlog(NULL, "(GUID: unknown) ");
87 av_dlog(NULL, " 0x%02x,", (*g)[i]);
95 void ff_get_guid(ByteIOContext *s, ff_asf_guid *g)
97 assert(sizeof(*g) == 16);
98 get_buffer(s, *g, sizeof(*g));
101 static int asf_probe(AVProbeData *pd)
103 /* check file header */
104 if (!ff_guidcmp(pd->buf, &ff_asf_header))
105 return AVPROBE_SCORE_MAX;
110 static int get_value(ByteIOContext *pb, int type){
112 case 2: return get_le32(pb);
113 case 3: return get_le32(pb);
114 case 4: return get_le64(pb);
115 case 5: return get_le16(pb);
116 default:return INT_MIN;
120 static void get_tag(AVFormatContext *s, const char *key, int type, int len)
123 int64_t off = url_ftell(s->pb);
125 if ((unsigned)len >= (UINT_MAX - 1)/2)
128 value = av_malloc(2*len+1);
132 if (type == 0) { // UTF16-LE
133 avio_get_str16le(s->pb, len, value, 2*len + 1);
134 } else if (type > 1 && type <= 5) { // boolean or DWORD or QWORD or WORD
135 uint64_t num = get_value(s->pb, type);
136 snprintf(value, len, "%"PRIu64, num);
138 av_log(s, AV_LOG_DEBUG, "Unsupported value type %d in tag %s.\n", type, key);
141 av_metadata_set2(&s->metadata, key, value, 0);
144 url_fseek(s->pb, off + len, SEEK_SET);
147 static int asf_read_header(AVFormatContext *s, AVFormatParameters *ap)
149 ASFContext *asf = s->priv_data;
151 ByteIOContext *pb = s->pb;
157 uint32_t bitrate[128];
159 memset(dar, 0, sizeof(dar));
160 memset(bitrate, 0, sizeof(bitrate));
163 if (ff_guidcmp(&g, &ff_asf_header))
169 memset(&asf->asfid2avid, -1, sizeof(asf->asfid2avid));
171 uint64_t gpos= url_ftell(pb);
174 gsize = get_le64(pb);
175 av_dlog(s, "%08"PRIx64": ", gpos);
177 av_dlog(s, " size=0x%"PRIx64"\n", gsize);
178 if (!ff_guidcmp(&g, &ff_asf_data_header)) {
179 asf->data_object_offset = url_ftell(pb);
180 // if not streaming, gsize is not unlimited (how?), and there is enough space in the file..
181 if (!(asf->hdr.flags & 0x01) && gsize >= 100) {
182 asf->data_object_size = gsize - 24;
184 asf->data_object_size = (uint64_t)-1;
190 if (!ff_guidcmp(&g, &ff_asf_file_header)) {
191 ff_get_guid(pb, &asf->hdr.guid);
192 asf->hdr.file_size = get_le64(pb);
193 asf->hdr.create_time = get_le64(pb);
194 asf->nb_packets = get_le64(pb);
195 asf->hdr.play_time = get_le64(pb);
196 asf->hdr.send_time = get_le64(pb);
197 asf->hdr.preroll = get_le32(pb);
198 asf->hdr.ignore = get_le32(pb);
199 asf->hdr.flags = get_le32(pb);
200 asf->hdr.min_pktsize = get_le32(pb);
201 asf->hdr.max_pktsize = get_le32(pb);
202 asf->hdr.max_bitrate = get_le32(pb);
203 s->packet_size = asf->hdr.max_pktsize;
204 } else if (!ff_guidcmp(&g, &ff_asf_stream_header)) {
205 enum AVMediaType type;
206 int type_specific_size, sizeX;
209 int64_t pos1, pos2, start_time;
210 int test_for_ext_stream_audio, is_dvr_ms_audio=0;
212 if (s->nb_streams == ASF_MAX_STREAMS) {
213 av_log(s, AV_LOG_ERROR, "too many streams\n");
214 return AVERROR(EINVAL);
217 pos1 = url_ftell(pb);
219 st = av_new_stream(s, 0);
221 return AVERROR(ENOMEM);
222 av_set_pts_info(st, 32, 1, 1000); /* 32 bit pts in ms */
223 asf_st = av_mallocz(sizeof(ASFStream));
225 return AVERROR(ENOMEM);
226 st->priv_data = asf_st;
227 start_time = asf->hdr.preroll;
229 asf_st->stream_language_index = 128; // invalid stream index means no language info
231 if(!(asf->hdr.flags & 0x01)) { // if we aren't streaming...
232 st->duration = asf->hdr.play_time /
233 (10000000 / 1000) - start_time;
237 test_for_ext_stream_audio = 0;
238 if (!ff_guidcmp(&g, &ff_asf_audio_stream)) {
239 type = AVMEDIA_TYPE_AUDIO;
240 } else if (!ff_guidcmp(&g, &ff_asf_video_stream)) {
241 type = AVMEDIA_TYPE_VIDEO;
242 } else if (!ff_guidcmp(&g, &ff_asf_jfif_media)) {
243 type = AVMEDIA_TYPE_VIDEO;
244 st->codec->codec_id = CODEC_ID_MJPEG;
245 } else if (!ff_guidcmp(&g, &ff_asf_command_stream)) {
246 type = AVMEDIA_TYPE_DATA;
247 } else if (!ff_guidcmp(&g, &ff_asf_ext_stream_embed_stream_header)) {
248 test_for_ext_stream_audio = 1;
249 type = AVMEDIA_TYPE_UNKNOWN;
254 total_size = get_le64(pb);
255 type_specific_size = get_le32(pb);
257 st->id = get_le16(pb) & 0x7f; /* stream id */
258 // mapping of asf ID to AV stream ID;
259 asf->asfid2avid[st->id] = s->nb_streams - 1;
263 if (test_for_ext_stream_audio) {
265 if (!ff_guidcmp(&g, &ff_asf_ext_stream_audio_stream)) {
266 type = AVMEDIA_TYPE_AUDIO;
277 st->codec->codec_type = type;
278 if (type == AVMEDIA_TYPE_AUDIO) {
279 ff_get_wav_header(pb, st->codec, type_specific_size);
280 if (is_dvr_ms_audio) {
281 // codec_id and codec_tag are unreliable in dvr_ms
282 // files. Set them later by probing stream.
283 st->codec->codec_id = CODEC_ID_PROBE;
284 st->codec->codec_tag = 0;
286 if (st->codec->codec_id == CODEC_ID_AAC) {
287 st->need_parsing = AVSTREAM_PARSE_NONE;
289 st->need_parsing = AVSTREAM_PARSE_FULL;
291 /* We have to init the frame size at some point .... */
292 pos2 = url_ftell(pb);
293 if (gsize >= (pos2 + 8 - pos1 + 24)) {
294 asf_st->ds_span = get_byte(pb);
295 asf_st->ds_packet_size = get_le16(pb);
296 asf_st->ds_chunk_size = get_le16(pb);
297 get_le16(pb); //ds_data_size
298 get_byte(pb); //ds_silence_data
300 //printf("Descrambling: ps:%d cs:%d ds:%d s:%d sd:%d\n",
301 // asf_st->ds_packet_size, asf_st->ds_chunk_size,
302 // asf_st->ds_data_size, asf_st->ds_span, asf_st->ds_silence_data);
303 if (asf_st->ds_span > 1) {
304 if (!asf_st->ds_chunk_size
305 || (asf_st->ds_packet_size/asf_st->ds_chunk_size <= 1)
306 || asf_st->ds_packet_size % asf_st->ds_chunk_size)
307 asf_st->ds_span = 0; // disable descrambling
309 switch (st->codec->codec_id) {
311 st->codec->frame_size = MPA_FRAME_SIZE;
313 case CODEC_ID_PCM_S16LE:
314 case CODEC_ID_PCM_S16BE:
315 case CODEC_ID_PCM_U16LE:
316 case CODEC_ID_PCM_U16BE:
317 case CODEC_ID_PCM_S8:
318 case CODEC_ID_PCM_U8:
319 case CODEC_ID_PCM_ALAW:
320 case CODEC_ID_PCM_MULAW:
321 st->codec->frame_size = 1;
324 /* This is probably wrong, but it prevents a crash later */
325 st->codec->frame_size = 1;
328 } else if (type == AVMEDIA_TYPE_VIDEO &&
329 gsize - (url_ftell(pb) - pos1 + 24) >= 51) {
333 size = get_le16(pb); /* size */
334 sizeX= get_le32(pb); /* size */
335 st->codec->width = get_le32(pb);
336 st->codec->height = get_le32(pb);
337 /* not available for asf */
338 get_le16(pb); /* panes */
339 st->codec->bits_per_coded_sample = get_le16(pb); /* depth */
342 // av_log(s, AV_LOG_DEBUG, "size:%d tsize:%d sizeX:%d\n", size, total_size, sizeX);
345 st->codec->extradata_size = size - 40;
346 st->codec->extradata = av_mallocz(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
347 get_buffer(pb, st->codec->extradata, st->codec->extradata_size);
350 /* Extract palette from extradata if bpp <= 8 */
351 /* This code assumes that extradata contains only palette */
352 /* This is true for all paletted codecs implemented in ffmpeg */
353 if (st->codec->extradata_size && (st->codec->bits_per_coded_sample <= 8)) {
354 st->codec->palctrl = av_mallocz(sizeof(AVPaletteControl));
356 for (i = 0; i < FFMIN(st->codec->extradata_size, AVPALETTE_SIZE)/4; i++)
357 st->codec->palctrl->palette[i] = av_bswap32(((uint32_t*)st->codec->extradata)[i]);
359 memcpy(st->codec->palctrl->palette, st->codec->extradata,
360 FFMIN(st->codec->extradata_size, AVPALETTE_SIZE));
362 st->codec->palctrl->palette_changed = 1;
365 st->codec->codec_tag = tag1;
366 st->codec->codec_id = ff_codec_get_id(ff_codec_bmp_tags, tag1);
367 if(tag1 == MKTAG('D', 'V', 'R', ' ')){
368 st->need_parsing = AVSTREAM_PARSE_FULL;
369 // 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
371 st->codec->height = 0;
372 av_freep(&st->codec->extradata);
373 st->codec->extradata_size=0;
375 if(st->codec->codec_id == CODEC_ID_H264)
376 st->need_parsing = AVSTREAM_PARSE_FULL_ONCE;
378 pos2 = url_ftell(pb);
379 url_fskip(pb, gsize - (pos2 - pos1 + 24));
380 } else if (!ff_guidcmp(&g, &ff_asf_comment_header)) {
381 int len1, len2, len3, len4, len5;
388 get_tag(s, "title" , 0, len1);
389 get_tag(s, "author" , 0, len2);
390 get_tag(s, "copyright", 0, len3);
391 get_tag(s, "comment" , 0, len4);
393 } else if (!ff_guidcmp(&g, &stream_bitrate_guid)) {
394 int stream_count = get_le16(pb);
397 // av_log(s, AV_LOG_ERROR, "stream bitrate properties\n");
398 // av_log(s, AV_LOG_ERROR, "streams %d\n", streams);
399 for(j = 0; j < stream_count; j++) {
400 int flags, bitrate, stream_id;
403 bitrate= get_le32(pb);
404 stream_id= (flags & 0x7f);
405 // av_log(s, AV_LOG_ERROR, "flags: 0x%x stream id %d, bitrate %d\n", flags, stream_id, bitrate);
406 asf->stream_bitrates[stream_id]= bitrate;
408 } else if (!ff_guidcmp(&g, &ff_asf_language_guid)) {
410 int stream_count = get_le16(pb);
411 for(j = 0; j < stream_count; j++) {
413 unsigned int lang_len = get_byte(pb);
414 if ((ret = avio_get_str16le(pb, lang_len, lang, sizeof(lang))) < lang_len)
415 url_fskip(pb, lang_len - ret);
417 av_strlcpy(asf->stream_languages[j], lang, sizeof(*asf->stream_languages));
419 } else if (!ff_guidcmp(&g, &ff_asf_extended_content_header)) {
422 desc_count = get_le16(pb);
423 for(i=0;i<desc_count;i++) {
424 int name_len,value_type,value_len;
427 name_len = get_le16(pb);
428 if (name_len%2) // must be even, broken lavf versions wrote len-1
430 if ((ret = avio_get_str16le(pb, name_len, name, sizeof(name))) < name_len)
431 url_fskip(pb, name_len - ret);
432 value_type = get_le16(pb);
433 value_len = get_le16(pb);
434 if (!value_type && value_len%2)
437 * My sample has that stream set to 0 maybe that mean the container.
438 * Asf stream count start at 1. I am using 0 to the container value since it's unused
440 if (!strcmp(name, "AspectRatioX")){
441 dar[0].num= get_value(s->pb, value_type);
442 } else if(!strcmp(name, "AspectRatioY")){
443 dar[0].den= get_value(s->pb, value_type);
445 get_tag(s, name, value_type, value_len);
447 } else if (!ff_guidcmp(&g, &ff_asf_metadata_header)) {
448 int n, stream_num, name_len, value_len, value_type, value_num;
454 get_le16(pb); //lang_list_index
455 stream_num= get_le16(pb);
456 name_len= get_le16(pb);
457 value_type= get_le16(pb);
458 value_len= get_le32(pb);
460 if ((ret = avio_get_str16le(pb, name_len, name, sizeof(name))) < name_len)
461 url_fskip(pb, name_len - ret);
462 //av_log(s, AV_LOG_ERROR, "%d %d %d %d %d <%s>\n", i, stream_num, name_len, value_type, value_len, name);
463 value_num= get_le16(pb);//we should use get_value() here but it does not work 2 is le16 here but le32 elsewhere
464 url_fskip(pb, value_len - 2);
467 if (!strcmp(name, "AspectRatioX")) dar[stream_num].num= value_num;
468 else if(!strcmp(name, "AspectRatioY")) dar[stream_num].den= value_num;
471 } else if (!ff_guidcmp(&g, &ff_asf_ext_stream_header)) {
472 int ext_len, payload_ext_ct, stream_ct;
473 uint32_t ext_d, leak_rate, stream_num;
474 unsigned int stream_languageid_index;
476 get_le64(pb); // starttime
477 get_le64(pb); // endtime
478 leak_rate = get_le32(pb); // leak-datarate
479 get_le32(pb); // bucket-datasize
480 get_le32(pb); // init-bucket-fullness
481 get_le32(pb); // alt-leak-datarate
482 get_le32(pb); // alt-bucket-datasize
483 get_le32(pb); // alt-init-bucket-fullness
484 get_le32(pb); // max-object-size
485 get_le32(pb); // flags (reliable,seekable,no_cleanpoints?,resend-live-cleanpoints, rest of bits reserved)
486 stream_num = get_le16(pb); // stream-num
488 stream_languageid_index = get_le16(pb); // stream-language-id-index
489 if (stream_num < 128)
490 asf->streams[stream_num].stream_language_index = stream_languageid_index;
492 get_le64(pb); // avg frametime in 100ns units
493 stream_ct = get_le16(pb); //stream-name-count
494 payload_ext_ct = get_le16(pb); //payload-extension-system-count
496 if (stream_num < 128)
497 bitrate[stream_num] = leak_rate;
499 for (i=0; i<stream_ct; i++){
501 ext_len = get_le16(pb);
502 url_fseek(pb, ext_len, SEEK_CUR);
505 for (i=0; i<payload_ext_ct; i++){
508 ext_len=get_le32(pb);
509 url_fseek(pb, ext_len, SEEK_CUR);
512 // there could be a optional stream properties object to follow
513 // if so the next iteration will pick it up
515 } else if (!ff_guidcmp(&g, &ff_asf_head1_guid)) {
521 } else if (!ff_guidcmp(&g, &ff_asf_marker_header)) {
522 int i, count, name_len;
525 get_le64(pb); // reserved 16 bytes
527 count = get_le32(pb); // markers count
528 get_le16(pb); // reserved 2 bytes
529 name_len = get_le16(pb); // name length
530 for(i=0;i<name_len;i++){
531 get_byte(pb); // skip the name
534 for(i=0;i<count;i++){
538 get_le64(pb); // offset, 8 bytes
539 pres_time = get_le64(pb); // presentation time
540 get_le16(pb); // entry length
541 get_le32(pb); // send time
542 get_le32(pb); // flags
543 name_len = get_le32(pb); // name length
544 if ((ret = avio_get_str16le(pb, name_len * 2, name, sizeof(name))) < name_len)
545 url_fskip(pb, name_len - ret);
546 ff_new_chapter(s, i, (AVRational){1, 10000000}, pres_time, AV_NOPTS_VALUE, name );
548 } else if (url_feof(pb)) {
552 if (!ff_guidcmp(&g, &ff_asf_content_encryption)) {
553 av_log(s, AV_LOG_WARNING, "DRM protected stream detected, decoding will likely fail!\n");
554 } else if (!ff_guidcmp(&g, &ff_asf_ext_content_encryption)) {
555 av_log(s, AV_LOG_WARNING, "Ext DRM protected stream detected, decoding will likely fail!\n");
556 } else if (!ff_guidcmp(&g, &ff_asf_digital_signature)) {
557 av_log(s, AV_LOG_WARNING, "Digital signature detected, decoding will likely fail!\n");
561 if(url_ftell(pb) != gpos + gsize)
562 av_log(s, AV_LOG_DEBUG, "gpos mismatch our pos=%"PRIu64", end=%"PRIu64"\n", url_ftell(pb)-gpos, gsize);
563 url_fseek(pb, gpos + gsize, SEEK_SET);
571 asf->data_offset = url_ftell(pb);
572 asf->packet_size_left = 0;
575 for(i=0; i<128; i++){
576 int stream_num= asf->asfid2avid[i];
578 AVStream *st = s->streams[stream_num];
579 if (!st->codec->bit_rate)
580 st->codec->bit_rate = bitrate[i];
581 if (dar[i].num > 0 && dar[i].den > 0){
582 av_reduce(&st->sample_aspect_ratio.num,
583 &st->sample_aspect_ratio.den,
584 dar[i].num, dar[i].den, INT_MAX);
585 } 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.
586 av_reduce(&st->sample_aspect_ratio.num,
587 &st->sample_aspect_ratio.den,
588 dar[0].num, dar[0].den, INT_MAX);
590 //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);
592 // copy and convert language codes to the frontend
593 if (asf->streams[i].stream_language_index < 128) {
594 const char *rfc1766 = asf->stream_languages[asf->streams[i].stream_language_index];
595 if (rfc1766 && strlen(rfc1766) > 1) {
596 const char primary_tag[3] = { rfc1766[0], rfc1766[1], '\0' }; // ignore country code if any
597 const char *iso6392 = av_convert_lang_to(primary_tag, AV_LANG_ISO639_2_BIBL);
599 av_metadata_set2(&st->metadata, "language", iso6392, 0);
605 ff_metadata_conv(&s->metadata, NULL, ff_asf_metadata_conv);
610 #define DO_2BITS(bits, var, defval) \
613 case 3: var = get_le32(pb); rsize += 4; break; \
614 case 2: var = get_le16(pb); rsize += 2; break; \
615 case 1: var = get_byte(pb); rsize++; break; \
616 default: var = defval; break; \
620 * Load a single ASF packet into the demuxer.
621 * @param s demux context
622 * @param pb context to read data from
623 * @return 0 on success, <0 on error
625 static int ff_asf_get_packet(AVFormatContext *s, ByteIOContext *pb)
627 ASFContext *asf = s->priv_data;
628 uint32_t packet_length, padsize;
632 // if we do not know packet size, allow skipping up to 32 kB
634 if (s->packet_size > 0)
635 off= (url_ftell(pb) - s->data_offset) % s->packet_size + 3;
641 if(c == 0x82 && !d && !e)
647 * This code allows handling of -EAGAIN at packet boundaries (i.e.
648 * if the packet sync code above triggers -EAGAIN). This does not
649 * imply complete -EAGAIN handling support at random positions in
652 if (url_ferror(pb) == AVERROR(EAGAIN))
653 return AVERROR(EAGAIN);
655 av_log(s, AV_LOG_ERROR, "ff asf bad header %x at:%"PRId64"\n", c, url_ftell(pb));
657 if ((c & 0x8f) == 0x82) {
660 av_log(s, AV_LOG_ERROR, "ff asf bad non zero\n");
667 url_fseek(pb, -1, SEEK_CUR); //FIXME
670 asf->packet_flags = c;
671 asf->packet_property = d;
673 DO_2BITS(asf->packet_flags >> 5, packet_length, s->packet_size);
674 DO_2BITS(asf->packet_flags >> 1, padsize, 0); // sequence ignored
675 DO_2BITS(asf->packet_flags >> 3, padsize, 0); // padding length
677 //the following checks prevent overflows and infinite loops
678 if(!packet_length || packet_length >= (1U<<29)){
679 av_log(s, AV_LOG_ERROR, "invalid packet_length %d at:%"PRId64"\n", packet_length, url_ftell(pb));
682 if(padsize >= packet_length){
683 av_log(s, AV_LOG_ERROR, "invalid padsize %d at:%"PRId64"\n", padsize, url_ftell(pb));
687 asf->packet_timestamp = get_le32(pb);
688 get_le16(pb); /* duration */
689 // rsize has at least 11 bytes which have to be present
691 if (asf->packet_flags & 0x01) {
692 asf->packet_segsizetype = get_byte(pb); rsize++;
693 asf->packet_segments = asf->packet_segsizetype & 0x3f;
695 asf->packet_segments = 1;
696 asf->packet_segsizetype = 0x80;
698 asf->packet_size_left = packet_length - padsize - rsize;
699 if (packet_length < asf->hdr.min_pktsize)
700 padsize += asf->hdr.min_pktsize - packet_length;
701 asf->packet_padsize = padsize;
702 av_dlog(s, "packet: size=%d padsize=%d left=%d\n", s->packet_size, asf->packet_padsize, asf->packet_size_left);
708 * @return <0 if error
710 static int asf_read_frame_header(AVFormatContext *s, ByteIOContext *pb){
711 ASFContext *asf = s->priv_data;
713 int num = get_byte(pb);
716 asf->packet_segments--;
717 asf->packet_key_frame = num >> 7;
718 asf->stream_index = asf->asfid2avid[num & 0x7f];
719 // sequence should be ignored!
720 DO_2BITS(asf->packet_property >> 4, asf->packet_seq, 0);
721 DO_2BITS(asf->packet_property >> 2, asf->packet_frag_offset, 0);
722 DO_2BITS(asf->packet_property, asf->packet_replic_size, 0);
723 //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);
724 if (asf->packet_replic_size >= 8) {
725 asf->packet_obj_size = get_le32(pb);
726 if(asf->packet_obj_size >= (1<<24) || asf->packet_obj_size <= 0){
727 av_log(s, AV_LOG_ERROR, "packet_obj_size invalid\n");
730 asf->packet_frag_timestamp = get_le32(pb); // timestamp
731 if(asf->packet_replic_size >= 8+38+4){
732 // for(i=0; i<asf->packet_replic_size-8; i++)
733 // av_log(s, AV_LOG_DEBUG, "%02X ",get_byte(pb));
734 // av_log(s, AV_LOG_DEBUG, "\n");
740 url_fskip(pb, asf->packet_replic_size - 8 - 38 - 4);
741 if(ts0!= -1) asf->packet_frag_timestamp= ts0/10000;
742 else asf->packet_frag_timestamp= AV_NOPTS_VALUE;
744 url_fskip(pb, asf->packet_replic_size - 8);
745 rsize += asf->packet_replic_size; // FIXME - check validity
746 } else if (asf->packet_replic_size==1){
747 // multipacket - frag_offset is beginning timestamp
748 asf->packet_time_start = asf->packet_frag_offset;
749 asf->packet_frag_offset = 0;
750 asf->packet_frag_timestamp = asf->packet_timestamp;
752 asf->packet_time_delta = get_byte(pb);
754 }else if(asf->packet_replic_size!=0){
755 av_log(s, AV_LOG_ERROR, "unexpected packet_replic_size of %d\n", asf->packet_replic_size);
758 if (asf->packet_flags & 0x01) {
759 DO_2BITS(asf->packet_segsizetype >> 6, asf->packet_frag_size, 0); // 0 is illegal
760 if(asf->packet_frag_size > asf->packet_size_left - rsize){
761 av_log(s, AV_LOG_ERROR, "packet_frag_size is invalid\n");
764 //printf("Fragsize %d\n", asf->packet_frag_size);
766 asf->packet_frag_size = asf->packet_size_left - rsize;
767 //printf("Using rest %d %d %d\n", asf->packet_frag_size, asf->packet_size_left, rsize);
769 if (asf->packet_replic_size == 1) {
770 asf->packet_multi_size = asf->packet_frag_size;
771 if (asf->packet_multi_size > asf->packet_size_left)
774 asf->packet_size_left -= rsize;
775 //printf("___objsize____ %d %d rs:%d\n", asf->packet_obj_size, asf->packet_frag_offset, rsize);
781 * Parse data from individual ASF packets (which were previously loaded
782 * with asf_get_packet()).
783 * @param s demux context
784 * @param pb context to read data from
785 * @param pkt pointer to store packet data into
786 * @return 0 if data was stored in pkt, <0 on error or 1 if more ASF
787 * packets need to be loaded (through asf_get_packet())
789 static int ff_asf_parse_packet(AVFormatContext *s, ByteIOContext *pb, AVPacket *pkt)
791 ASFContext *asf = s->priv_data;
792 ASFStream *asf_st = 0;
797 if (asf->packet_size_left < FRAME_HEADER_SIZE
798 || asf->packet_segments < 1) {
799 //asf->packet_size_left <= asf->packet_padsize) {
800 int ret = asf->packet_size_left + asf->packet_padsize;
801 //printf("PacketLeftSize:%d Pad:%d Pos:%"PRId64"\n", asf->packet_size_left, asf->packet_padsize, url_ftell(pb));
806 asf->packet_pos= url_ftell(pb);
807 if (asf->data_object_size != (uint64_t)-1 &&
808 (asf->packet_pos - asf->data_object_offset >= asf->data_object_size))
809 return AVERROR_EOF; /* Do not exceed the size of the data object */
812 if (asf->packet_time_start == 0) {
813 if(asf_read_frame_header(s, pb) < 0){
814 asf->packet_segments= 0;
817 if (asf->stream_index < 0
818 || s->streams[asf->stream_index]->discard >= AVDISCARD_ALL
819 || (!asf->packet_key_frame && s->streams[asf->stream_index]->discard >= AVDISCARD_NONKEY)
821 asf->packet_time_start = 0;
822 /* unhandled packet (should not happen) */
823 url_fskip(pb, asf->packet_frag_size);
824 asf->packet_size_left -= asf->packet_frag_size;
825 if(asf->stream_index < 0)
826 av_log(s, AV_LOG_ERROR, "ff asf skip %d (unknown stream)\n", asf->packet_frag_size);
829 asf->asf_st = s->streams[asf->stream_index]->priv_data;
831 asf_st = asf->asf_st;
833 if (asf->packet_replic_size == 1) {
834 // frag_offset is here used as the beginning timestamp
835 asf->packet_frag_timestamp = asf->packet_time_start;
836 asf->packet_time_start += asf->packet_time_delta;
837 asf->packet_obj_size = asf->packet_frag_size = get_byte(pb);
838 asf->packet_size_left--;
839 asf->packet_multi_size--;
840 if (asf->packet_multi_size < asf->packet_obj_size)
842 asf->packet_time_start = 0;
843 url_fskip(pb, asf->packet_multi_size);
844 asf->packet_size_left -= asf->packet_multi_size;
847 asf->packet_multi_size -= asf->packet_obj_size;
848 //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);
850 if( /*asf->packet_frag_size == asf->packet_obj_size*/
851 asf_st->frag_offset + asf->packet_frag_size <= asf_st->pkt.size
852 && asf_st->frag_offset + asf->packet_frag_size > asf->packet_obj_size){
853 av_log(s, AV_LOG_INFO, "ignoring invalid packet_obj_size (%d %d %d %d)\n",
854 asf_st->frag_offset, asf->packet_frag_size,
855 asf->packet_obj_size, asf_st->pkt.size);
856 asf->packet_obj_size= asf_st->pkt.size;
859 if ( asf_st->pkt.size != asf->packet_obj_size
860 || asf_st->frag_offset + asf->packet_frag_size > asf_st->pkt.size) { //FIXME is this condition sufficient?
861 if(asf_st->pkt.data){
862 av_log(s, AV_LOG_INFO, "freeing incomplete packet size %d, new %d\n", asf_st->pkt.size, asf->packet_obj_size);
863 asf_st->frag_offset = 0;
864 av_free_packet(&asf_st->pkt);
867 av_new_packet(&asf_st->pkt, asf->packet_obj_size);
868 asf_st->seq = asf->packet_seq;
869 asf_st->pkt.dts = asf->packet_frag_timestamp;
870 asf_st->pkt.stream_index = asf->stream_index;
872 asf_st->packet_pos= asf->packet_pos;
873 //printf("new packet: stream:%d key:%d packet_key:%d audio:%d size:%d\n",
874 //asf->stream_index, asf->packet_key_frame, asf_st->pkt.flags & AV_PKT_FLAG_KEY,
875 //s->streams[asf->stream_index]->codec->codec_type == AVMEDIA_TYPE_AUDIO, asf->packet_obj_size);
876 if (s->streams[asf->stream_index]->codec->codec_type == AVMEDIA_TYPE_AUDIO)
877 asf->packet_key_frame = 1;
878 if (asf->packet_key_frame)
879 asf_st->pkt.flags |= AV_PKT_FLAG_KEY;
883 //printf("READ PACKET s:%d os:%d o:%d,%d l:%d DATA:%p\n",
884 // s->packet_size, asf_st->pkt.size, asf->packet_frag_offset,
885 // asf_st->frag_offset, asf->packet_frag_size, asf_st->pkt.data);
886 asf->packet_size_left -= asf->packet_frag_size;
887 if (asf->packet_size_left < 0)
890 if( asf->packet_frag_offset >= asf_st->pkt.size
891 || asf->packet_frag_size > asf_st->pkt.size - asf->packet_frag_offset){
892 av_log(s, AV_LOG_ERROR, "packet fragment position invalid %u,%u not in %u\n",
893 asf->packet_frag_offset, asf->packet_frag_size, asf_st->pkt.size);
897 ret = get_buffer(pb, asf_st->pkt.data + asf->packet_frag_offset,
898 asf->packet_frag_size);
899 if (ret != asf->packet_frag_size) {
900 if (ret < 0 || asf->packet_frag_offset + ret == 0)
901 return ret < 0 ? ret : AVERROR_EOF;
902 if (asf_st->ds_span > 1) {
903 // scrambling, we can either drop it completely or fill the remainder
904 // TODO: should we fill the whole packet instead of just the current
906 memset(asf_st->pkt.data + asf->packet_frag_offset + ret, 0,
907 asf->packet_frag_size - ret);
908 ret = asf->packet_frag_size;
910 // no scrambling, so we can return partial packets
911 av_shrink_packet(&asf_st->pkt, asf->packet_frag_offset + ret);
913 if (s->key && s->keylen == 20)
914 ff_asfcrypt_dec(s->key, asf_st->pkt.data + asf->packet_frag_offset,
916 asf_st->frag_offset += ret;
917 /* test if whole packet is read */
918 if (asf_st->frag_offset == asf_st->pkt.size) {
919 //workaround for macroshit radio DVR-MS files
920 if( s->streams[asf->stream_index]->codec->codec_id == CODEC_ID_MPEG2VIDEO
921 && asf_st->pkt.size > 100){
923 for(i=0; i<asf_st->pkt.size && !asf_st->pkt.data[i]; i++);
924 if(i == asf_st->pkt.size){
925 av_log(s, AV_LOG_DEBUG, "discarding ms fart\n");
926 asf_st->frag_offset = 0;
927 av_free_packet(&asf_st->pkt);
933 if (asf_st->ds_span > 1) {
934 if(asf_st->pkt.size != asf_st->ds_packet_size * asf_st->ds_span){
935 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);
937 /* packet descrambling */
938 uint8_t *newdata = av_malloc(asf_st->pkt.size + FF_INPUT_BUFFER_PADDING_SIZE);
941 memset(newdata + asf_st->pkt.size, 0, FF_INPUT_BUFFER_PADDING_SIZE);
942 while (offset < asf_st->pkt.size) {
943 int off = offset / asf_st->ds_chunk_size;
944 int row = off / asf_st->ds_span;
945 int col = off % asf_st->ds_span;
946 int idx = row + col * asf_st->ds_packet_size / asf_st->ds_chunk_size;
947 //printf("off:%d row:%d col:%d idx:%d\n", off, row, col, idx);
949 assert(offset + asf_st->ds_chunk_size <= asf_st->pkt.size);
950 assert(idx+1 <= asf_st->pkt.size / asf_st->ds_chunk_size);
951 memcpy(newdata + offset,
952 asf_st->pkt.data + idx * asf_st->ds_chunk_size,
953 asf_st->ds_chunk_size);
954 offset += asf_st->ds_chunk_size;
956 av_free(asf_st->pkt.data);
957 asf_st->pkt.data = newdata;
961 asf_st->frag_offset = 0;
963 //printf("packet %d %d\n", asf_st->pkt.size, asf->packet_frag_size);
964 asf_st->pkt.size = 0;
965 asf_st->pkt.data = 0;
966 break; // packet completed
972 static int asf_read_packet(AVFormatContext *s, AVPacket *pkt)
974 ASFContext *asf = s->priv_data;
979 /* parse cached packets, if any */
980 if ((ret = ff_asf_parse_packet(s, s->pb, pkt)) <= 0)
982 if ((ret = ff_asf_get_packet(s, s->pb)) < 0)
983 assert(asf->packet_size_left < FRAME_HEADER_SIZE || asf->packet_segments < 1);
984 asf->packet_time_start = 0;
990 // Added to support seeking after packets have been read
991 // If information is not reset, read_packet fails due to
992 // leftover information from previous reads
993 static void asf_reset_header(AVFormatContext *s)
995 ASFContext *asf = s->priv_data;
999 asf->packet_nb_frames = 0;
1000 asf->packet_size_left = 0;
1001 asf->packet_segments = 0;
1002 asf->packet_flags = 0;
1003 asf->packet_property = 0;
1004 asf->packet_timestamp = 0;
1005 asf->packet_segsizetype = 0;
1006 asf->packet_segments = 0;
1007 asf->packet_seq = 0;
1008 asf->packet_replic_size = 0;
1009 asf->packet_key_frame = 0;
1010 asf->packet_padsize = 0;
1011 asf->packet_frag_offset = 0;
1012 asf->packet_frag_size = 0;
1013 asf->packet_frag_timestamp = 0;
1014 asf->packet_multi_size = 0;
1015 asf->packet_obj_size = 0;
1016 asf->packet_time_delta = 0;
1017 asf->packet_time_start = 0;
1019 for(i=0; i<s->nb_streams; i++){
1020 asf_st= s->streams[i]->priv_data;
1021 av_free_packet(&asf_st->pkt);
1022 asf_st->frag_offset=0;
1028 static int asf_read_close(AVFormatContext *s)
1032 asf_reset_header(s);
1033 for(i=0;i<s->nb_streams;i++) {
1034 AVStream *st = s->streams[i];
1035 av_free(st->codec->palctrl);
1040 static int64_t asf_read_pts(AVFormatContext *s, int stream_index, int64_t *ppos, int64_t pos_limit)
1042 AVPacket pkt1, *pkt = &pkt1;
1047 int64_t start_pos[ASF_MAX_STREAMS];
1049 for(i=0; i<s->nb_streams; i++){
1053 if (s->packet_size > 0)
1054 pos= (pos+s->packet_size-1-s->data_offset)/s->packet_size*s->packet_size+ s->data_offset;
1056 url_fseek(s->pb, pos, SEEK_SET);
1058 //printf("asf_read_pts\n");
1059 asf_reset_header(s);
1061 if (av_read_frame(s, pkt) < 0){
1062 av_log(s, AV_LOG_INFO, "asf_read_pts failed\n");
1063 return AV_NOPTS_VALUE;
1068 av_free_packet(pkt);
1069 if(pkt->flags&AV_PKT_FLAG_KEY){
1070 i= pkt->stream_index;
1072 asf_st= s->streams[i]->priv_data;
1074 // assert((asf_st->packet_pos - s->data_offset) % s->packet_size == 0);
1075 pos= asf_st->packet_pos;
1077 av_add_index_entry(s->streams[i], pos, pts, pkt->size, pos - start_pos[i] + 1, AVINDEX_KEYFRAME);
1078 start_pos[i]= asf_st->packet_pos + 1;
1080 if(pkt->stream_index == stream_index)
1086 //printf("found keyframe at %"PRId64" stream %d stamp:%"PRId64"\n", *ppos, stream_index, pts);
1091 static void asf_build_simple_index(AVFormatContext *s, int stream_index)
1094 ASFContext *asf = s->priv_data;
1095 int64_t current_pos= url_ftell(s->pb);
1098 url_fseek(s->pb, asf->data_object_offset + asf->data_object_size, SEEK_SET);
1099 ff_get_guid(s->pb, &g);
1101 /* the data object can be followed by other top-level objects,
1102 skip them until the simple index object is reached */
1103 while (ff_guidcmp(&g, &index_guid)) {
1104 int64_t gsize= get_le64(s->pb);
1105 if (gsize < 24 || url_feof(s->pb)) {
1106 url_fseek(s->pb, current_pos, SEEK_SET);
1109 url_fseek(s->pb, gsize-24, SEEK_CUR);
1110 ff_get_guid(s->pb, &g);
1114 int64_t itime, last_pos=-1;
1116 int64_t av_unused gsize= get_le64(s->pb);
1117 ff_get_guid(s->pb, &g);
1118 itime=get_le64(s->pb);
1119 pct=get_le32(s->pb);
1120 ict=get_le32(s->pb);
1121 av_log(s, AV_LOG_DEBUG, "itime:0x%"PRIx64", pct:%d, ict:%d\n",itime,pct,ict);
1123 for (i=0;i<ict;i++){
1124 int pktnum=get_le32(s->pb);
1125 int pktct =get_le16(s->pb);
1126 int64_t pos = s->data_offset + s->packet_size*(int64_t)pktnum;
1127 int64_t index_pts= av_rescale(itime, i, 10000);
1129 if(pos != last_pos){
1130 av_log(s, AV_LOG_DEBUG, "pktnum:%d, pktct:%d\n", pktnum, pktct);
1131 av_add_index_entry(s->streams[stream_index], pos, index_pts, s->packet_size, 0, AVINDEX_KEYFRAME);
1137 url_fseek(s->pb, current_pos, SEEK_SET);
1140 static int asf_read_seek(AVFormatContext *s, int stream_index, int64_t pts, int flags)
1142 ASFContext *asf = s->priv_data;
1143 AVStream *st = s->streams[stream_index];
1147 if (s->packet_size <= 0)
1150 /* Try using the protocol's read_seek if available */
1152 int ret = av_url_read_fseek(s->pb, stream_index, pts, flags);
1154 asf_reset_header(s);
1155 if (ret != AVERROR(ENOSYS))
1159 if (!asf->index_read)
1160 asf_build_simple_index(s, stream_index);
1162 if(!(asf->index_read && st->index_entries)){
1163 if(av_seek_frame_binary(s, stream_index, pts, flags)<0)
1166 index= av_index_search_timestamp(st, pts, flags);
1170 /* find the position */
1171 pos = st->index_entries[index].pos;
1173 // various attempts to find key frame have failed so far
1174 // asf_reset_header(s);
1175 // url_fseek(s->pb, pos, SEEK_SET);
1177 // for(i=0;i<16;i++){
1178 // pos = url_ftell(s->pb);
1179 // if (av_read_frame(s, &pkt) < 0){
1180 // av_log(s, AV_LOG_INFO, "seek failed\n");
1183 // asf_st = s->streams[stream_index]->priv_data;
1184 // pos += st->parser->frame_offset;
1186 // if (pkt.size > b) {
1191 // av_free_packet(&pkt);
1195 av_log(s, AV_LOG_DEBUG, "SEEKTO: %"PRId64"\n", pos);
1196 url_fseek(s->pb, pos, SEEK_SET);
1198 asf_reset_header(s);
1202 AVInputFormat ff_asf_demuxer = {
1204 NULL_IF_CONFIG_SMALL("ASF format"),