DVR-MS probe audio format
[ffmpeg.git] / libavformat / asf.c
1 /*
2  * ASF compatible demuxer
3  * Copyright (c) 2000, 2001 Fabrice Bellard.
4  *
5  * This file is part of FFmpeg.
6  *
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.
11  *
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.
16  *
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
20  */
21 #include "avformat.h"
22 #include "riff.h"
23 #include "mpegaudio.h"
24 #include "asf.h"
25 #include "common.h"
26
27 #undef NDEBUG
28 #include <assert.h>
29
30 #define FRAME_HEADER_SIZE 17
31 // Fix Me! FRAME_HEADER_SIZE may be different.
32
33 static const GUID index_guid = {
34     0x90, 0x08, 0x00, 0x33, 0xb1, 0xe5, 0xcf, 0x11, 0x89, 0xf4, 0x00, 0xa0, 0xc9, 0x03, 0x49, 0xcb
35 };
36
37 static const GUID stream_bitrate_guid = { /* (http://get.to/sdp) */
38     0xce, 0x75, 0xf8, 0x7b, 0x8d, 0x46, 0xd1, 0x11, 0x8d, 0x82, 0x00, 0x60, 0x97, 0xc9, 0xa2, 0xb2
39 };
40 /**********************************/
41 /* decoding */
42
43 //#define DEBUG
44
45 #ifdef DEBUG
46 #define PRINT_IF_GUID(g,cmp) \
47 if (!memcmp(g, &cmp, sizeof(GUID))) \
48     printf("(GUID: %s) ", #cmp)
49
50 static void print_guid(const GUID *g)
51 {
52     int i;
53     PRINT_IF_GUID(g, asf_header);
54     else PRINT_IF_GUID(g, file_header);
55     else PRINT_IF_GUID(g, stream_header);
56     else PRINT_IF_GUID(g, audio_stream);
57     else PRINT_IF_GUID(g, audio_conceal_none);
58     else PRINT_IF_GUID(g, video_stream);
59     else PRINT_IF_GUID(g, video_conceal_none);
60     else PRINT_IF_GUID(g, command_stream);
61     else PRINT_IF_GUID(g, comment_header);
62     else PRINT_IF_GUID(g, codec_comment_header);
63     else PRINT_IF_GUID(g, codec_comment1_header);
64     else PRINT_IF_GUID(g, data_header);
65     else PRINT_IF_GUID(g, index_guid);
66     else PRINT_IF_GUID(g, head1_guid);
67     else PRINT_IF_GUID(g, head2_guid);
68     else PRINT_IF_GUID(g, my_guid);
69     else PRINT_IF_GUID(g, ext_stream_header);
70     else PRINT_IF_GUID(g, extended_content_header);
71     else PRINT_IF_GUID(g, ext_stream_embed_stream_header);
72     else PRINT_IF_GUID(g, ext_stream_audio_stream);
73     else PRINT_IF_GUID(g, metadata_header);
74     else PRINT_IF_GUID(g, stream_bitrate_guid);
75     else
76         printf("(GUID: unknown) ");
77     for(i=0;i<16;i++)
78         printf(" 0x%02x,", (*g)[i]);
79     printf("}\n");
80 }
81 #undef PRINT_IF_GUID
82 #endif
83
84 static void get_guid(ByteIOContext *s, GUID *g)
85 {
86     assert(sizeof(*g) == 16);
87     get_buffer(s, g, sizeof(*g));
88 }
89
90 #if 0
91 static void get_str16(ByteIOContext *pb, char *buf, int buf_size)
92 {
93     int len, c;
94     char *q;
95
96     len = get_le16(pb);
97     q = buf;
98     while (len > 0) {
99         c = get_le16(pb);
100         if ((q - buf) < buf_size - 1)
101             *q++ = c;
102         len--;
103     }
104     *q = '\0';
105 }
106 #endif
107
108 static void get_str16_nolen(ByteIOContext *pb, int len, char *buf, int buf_size)
109 {
110     char* q = buf;
111     len /= 2;
112     while (len--) {
113         uint8_t tmp;
114         PUT_UTF8(get_le16(pb), tmp, if (q - buf < buf_size - 1) *q++ = tmp;)
115     }
116     *q = '\0';
117 }
118
119 static int asf_probe(AVProbeData *pd)
120 {
121     /* check file header */
122     if (!memcmp(pd->buf, &asf_header, sizeof(GUID)))
123         return AVPROBE_SCORE_MAX;
124     else
125         return 0;
126 }
127
128 static int get_value(ByteIOContext *pb, int type){
129     switch(type){
130         case 2: return get_le32(pb);
131         case 3: return get_le32(pb);
132         case 4: return get_le64(pb);
133         case 5: return get_le16(pb);
134         default:return INT_MIN;
135     }
136 }
137
138 static int asf_read_header(AVFormatContext *s, AVFormatParameters *ap)
139 {
140     ASFContext *asf = s->priv_data;
141     GUID g;
142     ByteIOContext *pb = &s->pb;
143     AVStream *st;
144     ASFStream *asf_st;
145     int size, i;
146     int64_t gsize;
147     AVRational dar[128];
148
149     memset(dar, 0, sizeof(dar));
150
151     get_guid(pb, &g);
152     if (memcmp(&g, &asf_header, sizeof(GUID)))
153         goto fail;
154     get_le64(pb);
155     get_le32(pb);
156     get_byte(pb);
157     get_byte(pb);
158     memset(&asf->asfid2avid, -1, sizeof(asf->asfid2avid));
159     for(;;) {
160         get_guid(pb, &g);
161         gsize = get_le64(pb);
162 #ifdef DEBUG
163         printf("%08"PRIx64": ", url_ftell(pb) - 24);
164         print_guid(&g);
165         printf("  size=0x%"PRIx64"\n", gsize);
166 #endif
167         if (!memcmp(&g, &data_header, sizeof(GUID))) {
168             asf->data_object_offset = url_ftell(pb);
169             // if not streaming, gsize is not unlimited (how?), and there is enough space in the file..
170             if (!(asf->hdr.flags & 0x01) && gsize >= 100) {
171                 asf->data_object_size = gsize - 24;
172             } else {
173                 asf->data_object_size = (uint64_t)-1;
174             }
175             break;
176         }
177         if (gsize < 24)
178             goto fail;
179         if (!memcmp(&g, &file_header, sizeof(GUID))) {
180             get_guid(pb, &asf->hdr.guid);
181             asf->hdr.file_size          = get_le64(pb);
182             asf->hdr.create_time        = get_le64(pb);
183             asf->nb_packets             = get_le64(pb);
184             asf->hdr.send_time          = get_le64(pb);
185             asf->hdr.play_time          = get_le64(pb);
186             asf->hdr.preroll            = get_le32(pb);
187             asf->hdr.ignore             = get_le32(pb);
188             asf->hdr.flags              = get_le32(pb);
189             asf->hdr.min_pktsize        = get_le32(pb);
190             asf->hdr.max_pktsize        = get_le32(pb);
191             asf->hdr.max_bitrate        = get_le32(pb);
192             asf->packet_size = asf->hdr.max_pktsize;
193         } else if (!memcmp(&g, &stream_header, sizeof(GUID))) {
194             int type, type_specific_size, sizeX;
195             uint64_t total_size;
196             unsigned int tag1;
197             int64_t pos1, pos2;
198             int test_for_ext_stream_audio, is_dvr_ms_audio=0;
199
200             pos1 = url_ftell(pb);
201
202             st = av_new_stream(s, 0);
203             if (!st)
204                 goto fail;
205             av_set_pts_info(st, 32, 1, 1000); /* 32 bit pts in ms */
206             asf_st = av_mallocz(sizeof(ASFStream));
207             if (!asf_st)
208                 goto fail;
209             st->priv_data = asf_st;
210             st->start_time = asf->hdr.preroll;
211             if(!(asf->hdr.flags & 0x01)) { // if we aren't streaming...
212                 st->duration = asf->hdr.send_time /
213                     (10000000 / 1000) - st->start_time;
214             }
215             get_guid(pb, &g);
216
217             test_for_ext_stream_audio = 0;
218             if (!memcmp(&g, &audio_stream, sizeof(GUID))) {
219                 type = CODEC_TYPE_AUDIO;
220             } else if (!memcmp(&g, &video_stream, sizeof(GUID))) {
221                 type = CODEC_TYPE_VIDEO;
222             } else if (!memcmp(&g, &command_stream, sizeof(GUID))) {
223                 type = CODEC_TYPE_UNKNOWN;
224             } else if (!memcmp(&g, &ext_stream_embed_stream_header, sizeof(GUID))) {
225                 test_for_ext_stream_audio = 1;
226                 type = CODEC_TYPE_UNKNOWN;
227             } else {
228                 goto fail;
229             }
230             get_guid(pb, &g);
231             total_size = get_le64(pb);
232             type_specific_size = get_le32(pb);
233             get_le32(pb);
234             st->id = get_le16(pb) & 0x7f; /* stream id */
235             // mapping of asf ID to AV stream ID;
236             asf->asfid2avid[st->id] = s->nb_streams - 1;
237
238             get_le32(pb);
239
240             if (test_for_ext_stream_audio) {
241                 get_guid(pb, &g);
242                 if (!memcmp(&g, &ext_stream_audio_stream, sizeof(GUID))) {
243                     type = CODEC_TYPE_AUDIO;
244                     is_dvr_ms_audio=1;
245                     get_guid(pb, &g);
246                     get_le32(pb);
247                     get_le32(pb);
248                     get_le32(pb);
249                     get_guid(pb, &g);
250                     get_le32(pb);
251                 }
252             }
253
254             st->codec->codec_type = type;
255             if (type == CODEC_TYPE_AUDIO) {
256                 get_wav_header(pb, st->codec, type_specific_size);
257                 if (is_dvr_ms_audio) {
258                     // codec_id and codec_tag are unreliable in dvr_ms
259                     // files. Set them later by probing stream.
260                     st->codec->codec_id = CODEC_ID_NONE;
261                     st->codec->codec_tag = 0;
262                 }
263                 st->need_parsing = 1;
264                 /* We have to init the frame size at some point .... */
265                 pos2 = url_ftell(pb);
266                 if (gsize >= (pos2 + 8 - pos1 + 24)) {
267                     asf_st->ds_span = get_byte(pb);
268                     asf_st->ds_packet_size = get_le16(pb);
269                     asf_st->ds_chunk_size = get_le16(pb);
270                     get_le16(pb); //ds_data_size
271                     get_byte(pb); //ds_silence_data
272                 }
273                 //printf("Descrambling: ps:%d cs:%d ds:%d s:%d  sd:%d\n",
274                 //       asf_st->ds_packet_size, asf_st->ds_chunk_size,
275                 //       asf_st->ds_data_size, asf_st->ds_span, asf_st->ds_silence_data);
276                 if (asf_st->ds_span > 1) {
277                     if (!asf_st->ds_chunk_size
278                         || (asf_st->ds_packet_size/asf_st->ds_chunk_size <= 1)
279                         || asf_st->ds_packet_size % asf_st->ds_chunk_size)
280                         asf_st->ds_span = 0; // disable descrambling
281                 }
282                 switch (st->codec->codec_id) {
283                 case CODEC_ID_MP3:
284                     st->codec->frame_size = MPA_FRAME_SIZE;
285                     break;
286                 case CODEC_ID_PCM_S16LE:
287                 case CODEC_ID_PCM_S16BE:
288                 case CODEC_ID_PCM_U16LE:
289                 case CODEC_ID_PCM_U16BE:
290                 case CODEC_ID_PCM_S8:
291                 case CODEC_ID_PCM_U8:
292                 case CODEC_ID_PCM_ALAW:
293                 case CODEC_ID_PCM_MULAW:
294                     st->codec->frame_size = 1;
295                     break;
296                 default:
297                     /* This is probably wrong, but it prevents a crash later */
298                     st->codec->frame_size = 1;
299                     break;
300                 }
301             } else if (type == CODEC_TYPE_VIDEO) {
302                 get_le32(pb);
303                 get_le32(pb);
304                 get_byte(pb);
305                 size = get_le16(pb); /* size */
306                 sizeX= get_le32(pb); /* size */
307                 st->codec->width = get_le32(pb);
308                 st->codec->height = get_le32(pb);
309                 /* not available for asf */
310                 get_le16(pb); /* panes */
311                 st->codec->bits_per_sample = get_le16(pb); /* depth */
312                 tag1 = get_le32(pb);
313                 url_fskip(pb, 20);
314 //                av_log(NULL, AV_LOG_DEBUG, "size:%d tsize:%d sizeX:%d\n", size, total_size, sizeX);
315                 size= sizeX;
316                 if (size > 40) {
317                     st->codec->extradata_size = size - 40;
318                     st->codec->extradata = av_mallocz(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
319                     get_buffer(pb, st->codec->extradata, st->codec->extradata_size);
320                 }
321
322         /* Extract palette from extradata if bpp <= 8 */
323         /* This code assumes that extradata contains only palette */
324         /* This is true for all paletted codecs implemented in ffmpeg */
325         if (st->codec->extradata_size && (st->codec->bits_per_sample <= 8)) {
326             st->codec->palctrl = av_mallocz(sizeof(AVPaletteControl));
327 #ifdef WORDS_BIGENDIAN
328             for (i = 0; i < FFMIN(st->codec->extradata_size, AVPALETTE_SIZE)/4; i++)
329                 st->codec->palctrl->palette[i] = bswap_32(((uint32_t*)st->codec->extradata)[i]);
330 #else
331             memcpy(st->codec->palctrl->palette, st->codec->extradata,
332                    FFMIN(st->codec->extradata_size, AVPALETTE_SIZE));
333 #endif
334             st->codec->palctrl->palette_changed = 1;
335         }
336
337                 st->codec->codec_tag = tag1;
338                 st->codec->codec_id = codec_get_id(codec_bmp_tags, tag1);
339                 if(tag1 == MKTAG('D', 'V', 'R', ' '))
340                     st->need_parsing = 1;
341             }
342             pos2 = url_ftell(pb);
343             url_fskip(pb, gsize - (pos2 - pos1 + 24));
344         } else if (!memcmp(&g, &comment_header, sizeof(GUID))) {
345             int len1, len2, len3, len4, len5;
346
347             len1 = get_le16(pb);
348             len2 = get_le16(pb);
349             len3 = get_le16(pb);
350             len4 = get_le16(pb);
351             len5 = get_le16(pb);
352             get_str16_nolen(pb, len1, s->title    , sizeof(s->title));
353             get_str16_nolen(pb, len2, s->author   , sizeof(s->author));
354             get_str16_nolen(pb, len3, s->copyright, sizeof(s->copyright));
355             get_str16_nolen(pb, len4, s->comment  , sizeof(s->comment));
356             url_fskip(pb, len5);
357         } else if (!memcmp(&g, &stream_bitrate_guid, sizeof(GUID))) {
358             int stream_count = get_le16(pb);
359             int j;
360
361 //            av_log(NULL, AV_LOG_ERROR, "stream bitrate properties\n");
362 //            av_log(NULL, AV_LOG_ERROR, "streams %d\n", streams);
363             for(j = 0; j < stream_count; j++) {
364                 int flags, bitrate, stream_id;
365
366                 flags= get_le16(pb);
367                 bitrate= get_le32(pb);
368                 stream_id= (flags & 0x7f);
369 //                av_log(NULL, AV_LOG_ERROR, "flags: 0x%x stream id %d, bitrate %d\n", flags, stream_id, bitrate);
370                 asf->stream_bitrates[stream_id-1]= bitrate;
371             }
372        } else if (!memcmp(&g, &extended_content_header, sizeof(GUID))) {
373                 int desc_count, i;
374
375                 desc_count = get_le16(pb);
376                 for(i=0;i<desc_count;i++)
377                 {
378                         int name_len,value_type,value_len;
379                         uint64_t value_num = 0;
380                         char name[1024];
381
382                         name_len = get_le16(pb);
383                         get_str16_nolen(pb, name_len, name, sizeof(name));
384                         value_type = get_le16(pb);
385                         value_len = get_le16(pb);
386                         if ((value_type == 0) || (value_type == 1)) // unicode or byte
387                         {
388                                 if     (!strcmp(name,"WM/AlbumTitle")) get_str16_nolen(pb, value_len, s->album, sizeof(s->album));
389                                 else if(!strcmp(name,"WM/Genre"     )) get_str16_nolen(pb, value_len, s->genre, sizeof(s->genre));
390                                 else url_fskip(pb, value_len);
391                         }
392                         if ((value_type >= 2) && (value_type <= 5)) // boolean or DWORD or QWORD or WORD
393                         {
394                                 value_num= get_value(pb, value_type);
395                                 if (!strcmp(name,"WM/Track"      )) s->track = value_num + 1;
396                                 if (!strcmp(name,"WM/TrackNumber")) s->track = value_num;
397                         }
398                 }
399         } else if (!memcmp(&g, &metadata_header, sizeof(GUID))) {
400             int n, stream_num, name_len, value_len, value_type, value_num;
401             n = get_le16(pb);
402
403             for(i=0;i<n;i++) {
404                 char name[1024];
405
406                 get_le16(pb); //lang_list_index
407                 stream_num= get_le16(pb);
408                 name_len=   get_le16(pb);
409                 value_type= get_le16(pb);
410                 value_len=  get_le32(pb);
411
412                 get_str16_nolen(pb, name_len, name, sizeof(name));
413 //av_log(NULL, AV_LOG_ERROR, "%d %d %d %d %d <%s>\n", i, stream_num, name_len, value_type, value_len, name);
414                 value_num= get_le16(pb);//we should use get_value() here but it doesnt work 2 is le16 here but le32 elsewhere
415                 url_fskip(pb, value_len - 2);
416
417                 if(stream_num<128){
418                     if     (!strcmp(name, "AspectRatioX")) dar[stream_num].num= value_num;
419                     else if(!strcmp(name, "AspectRatioY")) dar[stream_num].den= value_num;
420                 }
421             }
422         } else if (!memcmp(&g, &ext_stream_header, sizeof(GUID))) {
423             int ext_len, payload_ext_ct, stream_ct;
424             uint32_t ext_d;
425             int64_t pos_ex_st;
426             pos_ex_st = url_ftell(pb);
427
428             get_le64(pb); // starttime
429             get_le64(pb); // endtime
430             get_le32(pb); // leak-datarate
431             get_le32(pb); // bucket-datasize
432             get_le32(pb); // init-bucket-fullness
433             get_le32(pb); // alt-leak-datarate
434             get_le32(pb); // alt-bucket-datasize
435             get_le32(pb); // alt-init-bucket-fullness
436             get_le32(pb); // max-object-size
437             get_le32(pb); // flags (reliable,seekable,no_cleanpoints?,resend-live-cleanpoints, rest of bits reserved)
438             get_le16(pb); // stream-num
439             get_le16(pb); // stream-language-id-index
440             get_le64(pb); // avg frametime in 100ns units
441             stream_ct = get_le16(pb); //stream-name-count
442             payload_ext_ct = get_le16(pb); //payload-extension-system-count
443
444             for (i=0; i<stream_ct; i++){
445                 get_le16(pb);
446                 ext_len = get_le16(pb);
447                 url_fseek(pb, ext_len, SEEK_CUR);
448             }
449
450             for (i=0; i<payload_ext_ct; i++){
451                 get_guid(pb, &g);
452                 ext_d=get_le16(pb);
453                 ext_len=get_le32(pb);
454                 url_fseek(pb, ext_len, SEEK_CUR);
455             }
456
457             // there could be a optional stream properties object to follow
458             // if so the next iteration will pick it up
459         } else if (!memcmp(&g, &head1_guid, sizeof(GUID))) {
460             int v1, v2;
461             get_guid(pb, &g);
462             v1 = get_le32(pb);
463             v2 = get_le16(pb);
464 #if 0
465         } else if (!memcmp(&g, &codec_comment_header, sizeof(GUID))) {
466             int len, v1, n, num;
467             char str[256], *q;
468             char tag[16];
469
470             get_guid(pb, &g);
471             print_guid(&g);
472
473             n = get_le32(pb);
474             for(i=0;i<n;i++) {
475                 num = get_le16(pb); /* stream number */
476                 get_str16(pb, str, sizeof(str));
477                 get_str16(pb, str, sizeof(str));
478                 len = get_le16(pb);
479                 q = tag;
480                 while (len > 0) {
481                     v1 = get_byte(pb);
482                     if ((q - tag) < sizeof(tag) - 1)
483                         *q++ = v1;
484                     len--;
485                 }
486                 *q = '\0';
487             }
488 #endif
489         } else if (url_feof(pb)) {
490             goto fail;
491         } else {
492             url_fseek(pb, gsize - 24, SEEK_CUR);
493         }
494     }
495     get_guid(pb, &g);
496     get_le64(pb);
497     get_byte(pb);
498     get_byte(pb);
499     if (url_feof(pb))
500         goto fail;
501     asf->data_offset = url_ftell(pb);
502     asf->packet_size_left = 0;
503
504
505     for(i=0; i<128; i++){
506         int stream_num= asf->asfid2avid[i];
507         if(stream_num>=0 && dar[i].num>0 && dar[i].den>0){
508             AVCodecContext *codec= s->streams[stream_num]->codec;
509             av_reduce(&codec->sample_aspect_ratio.num,
510                     &codec->sample_aspect_ratio.den,
511                     dar[i].num, dar[i].den, INT_MAX);
512 //av_log(NULL, AV_LOG_ERROR, "dar %d:%d sar=%d:%d\n", dar[i].num, dar[i].den, codec->sample_aspect_ratio.num, codec->sample_aspect_ratio.den);
513         }
514     }
515
516     return 0;
517
518  fail:
519      for(i=0;i<s->nb_streams;i++) {
520         AVStream *st = s->streams[i];
521         if (st) {
522             av_free(st->priv_data);
523             av_free(st->codec->extradata);
524         }
525         av_free(st);
526     }
527     return -1;
528 }
529
530 #define DO_2BITS(bits, var, defval) \
531     switch (bits & 3) \
532     { \
533     case 3: var = get_le32(pb); rsize += 4; break; \
534     case 2: var = get_le16(pb); rsize += 2; break; \
535     case 1: var = get_byte(pb); rsize++; break; \
536     default: var = defval; break; \
537     }
538
539 /**
540  *
541  * @return <0 in case of an error
542  */
543 static int asf_get_packet(AVFormatContext *s)
544 {
545     ASFContext *asf = s->priv_data;
546     ByteIOContext *pb = &s->pb;
547     uint32_t packet_length, padsize;
548     int rsize = 8;
549     int c, d, e, off;
550
551     off= (url_ftell(&s->pb) - s->data_offset) % asf->packet_size + 3;
552
553     c=d=e=-1;
554     while(off-- > 0){
555         c=d; d=e;
556         e= get_byte(pb);
557         if(c == 0x82 && !d && !e)
558             break;
559     }
560
561     if (c != 0x82) {
562         if (!url_feof(pb))
563             av_log(s, AV_LOG_ERROR, "ff asf bad header %x  at:%"PRId64"\n", c, url_ftell(pb));
564     }
565     if ((c & 0x8f) == 0x82) {
566         if (d || e) {
567             if (!url_feof(pb))
568                 av_log(s, AV_LOG_ERROR, "ff asf bad non zero\n");
569             return -1;
570         }
571         c= get_byte(pb);
572         d= get_byte(pb);
573         rsize+=3;
574     }else{
575         url_fseek(pb, -1, SEEK_CUR); //FIXME
576     }
577
578     asf->packet_flags    = c;
579     asf->packet_property = d;
580
581     DO_2BITS(asf->packet_flags >> 5, packet_length, asf->packet_size);
582     DO_2BITS(asf->packet_flags >> 1, padsize, 0); // sequence ignored
583     DO_2BITS(asf->packet_flags >> 3, padsize, 0); // padding length
584
585     //the following checks prevent overflows and infinite loops
586     if(packet_length >= (1U<<29)){
587         av_log(s, AV_LOG_ERROR, "invalid packet_length %d at:%"PRId64"\n", packet_length, url_ftell(pb));
588         return -1;
589     }
590     if(padsize >= packet_length){
591         av_log(s, AV_LOG_ERROR, "invalid padsize %d at:%"PRId64"\n", padsize, url_ftell(pb));
592         return -1;
593     }
594
595     asf->packet_timestamp = get_le32(pb);
596     get_le16(pb); /* duration */
597     // rsize has at least 11 bytes which have to be present
598
599     if (asf->packet_flags & 0x01) {
600         asf->packet_segsizetype = get_byte(pb); rsize++;
601         asf->packet_segments = asf->packet_segsizetype & 0x3f;
602     } else {
603         asf->packet_segments = 1;
604         asf->packet_segsizetype = 0x80;
605     }
606     asf->packet_size_left = packet_length - padsize - rsize;
607     if (packet_length < asf->hdr.min_pktsize)
608         padsize += asf->hdr.min_pktsize - packet_length;
609     asf->packet_padsize = padsize;
610 #ifdef DEBUG
611     printf("packet: size=%d padsize=%d  left=%d\n", asf->packet_size, asf->packet_padsize, asf->packet_size_left);
612 #endif
613     return 0;
614 }
615
616 /**
617  *
618  * @return <0 if error
619  */
620 static int asf_read_frame_header(AVFormatContext *s){
621     ASFContext *asf = s->priv_data;
622     ByteIOContext *pb = &s->pb;
623     int rsize = 1;
624     int num = get_byte(pb);
625     int64_t ts0, ts1;
626
627     asf->packet_segments--;
628     asf->packet_key_frame = num >> 7;
629     asf->stream_index = asf->asfid2avid[num & 0x7f];
630     // sequence should be ignored!
631     DO_2BITS(asf->packet_property >> 4, asf->packet_seq, 0);
632     DO_2BITS(asf->packet_property >> 2, asf->packet_frag_offset, 0);
633     DO_2BITS(asf->packet_property, asf->packet_replic_size, 0);
634 //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);
635     if (asf->packet_replic_size >= 8) {
636         asf->packet_obj_size = get_le32(pb);
637         if(asf->packet_obj_size >= (1<<24) || asf->packet_obj_size <= 0){
638             av_log(s, AV_LOG_ERROR, "packet_obj_size invalid\n");
639             return -1;
640         }
641         asf->packet_frag_timestamp = get_le32(pb); // timestamp
642         if(asf->packet_replic_size >= 8+38+4){
643 //            for(i=0; i<asf->packet_replic_size-8; i++)
644 //                av_log(s, AV_LOG_DEBUG, "%02X ",get_byte(pb));
645 //            av_log(s, AV_LOG_DEBUG, "\n");
646             url_fskip(pb, 10);
647             ts0= get_le64(pb);
648             ts1= get_le64(pb);
649             url_fskip(pb, 12);
650             get_le32(pb);
651             url_fskip(pb, asf->packet_replic_size - 8 - 38 - 4);
652             if(ts0!= -1) asf->packet_frag_timestamp= ts0/10000;
653             else         asf->packet_frag_timestamp= AV_NOPTS_VALUE;
654         }else
655             url_fskip(pb, asf->packet_replic_size - 8);
656         rsize += asf->packet_replic_size; // FIXME - check validity
657     } else if (asf->packet_replic_size==1){
658         // multipacket - frag_offset is begining timestamp
659         asf->packet_time_start = asf->packet_frag_offset;
660         asf->packet_frag_offset = 0;
661         asf->packet_frag_timestamp = asf->packet_timestamp;
662
663         asf->packet_time_delta = get_byte(pb);
664         rsize++;
665     }else if(asf->packet_replic_size!=0){
666         av_log(s, AV_LOG_ERROR, "unexpected packet_replic_size of %d\n", asf->packet_replic_size);
667         return -1;
668     }
669     if (asf->packet_flags & 0x01) {
670         DO_2BITS(asf->packet_segsizetype >> 6, asf->packet_frag_size, 0); // 0 is illegal
671         if(asf->packet_frag_size > asf->packet_size_left - rsize){
672             av_log(s, AV_LOG_ERROR, "packet_frag_size is invalid\n");
673             return -1;
674         }
675         //printf("Fragsize %d\n", asf->packet_frag_size);
676     } else {
677         asf->packet_frag_size = asf->packet_size_left - rsize;
678         //printf("Using rest  %d %d %d\n", asf->packet_frag_size, asf->packet_size_left, rsize);
679     }
680     if (asf->packet_replic_size == 1) {
681         asf->packet_multi_size = asf->packet_frag_size;
682         if (asf->packet_multi_size > asf->packet_size_left)
683             return -1;
684     }
685     asf->packet_size_left -= rsize;
686     //printf("___objsize____  %d   %d    rs:%d\n", asf->packet_obj_size, asf->packet_frag_offset, rsize);
687
688     return 0;
689 }
690
691 static int asf_read_packet(AVFormatContext *s, AVPacket *pkt)
692 {
693     ASFContext *asf = s->priv_data;
694     ASFStream *asf_st = 0;
695     ByteIOContext *pb = &s->pb;
696     //static int pc = 0;
697     for (;;) {
698         if(url_feof(pb))
699             return AVERROR_IO;
700         if (asf->packet_size_left < FRAME_HEADER_SIZE
701             || asf->packet_segments < 1) {
702             //asf->packet_size_left <= asf->packet_padsize) {
703             int ret = asf->packet_size_left + asf->packet_padsize;
704             //printf("PacketLeftSize:%d  Pad:%d Pos:%"PRId64"\n", asf->packet_size_left, asf->packet_padsize, url_ftell(pb));
705             assert(ret>=0);
706             /* fail safe */
707             url_fskip(pb, ret);
708
709             asf->packet_pos= url_ftell(&s->pb);
710             if (asf->data_object_size != (uint64_t)-1 &&
711                 (asf->packet_pos - asf->data_object_offset >= asf->data_object_size))
712                 return AVERROR_IO; /* Do not exceed the size of the data object */
713             ret = asf_get_packet(s);
714             //printf("READ ASF PACKET  %d   r:%d   c:%d\n", ret, asf->packet_size_left, pc++);
715             if (ret < 0)
716                 assert(asf->packet_size_left < FRAME_HEADER_SIZE || asf->packet_segments < 1);
717             asf->packet_time_start = 0;
718             continue;
719         }
720         if (asf->packet_time_start == 0) {
721             if(asf_read_frame_header(s) < 0){
722                 asf->packet_segments= 0;
723                 continue;
724             }
725             if (asf->stream_index < 0
726                 || s->streams[asf->stream_index]->discard >= AVDISCARD_ALL
727                 || (!asf->packet_key_frame && s->streams[asf->stream_index]->discard >= AVDISCARD_NONKEY)
728                 ) {
729                 asf->packet_time_start = 0;
730                 /* unhandled packet (should not happen) */
731                 url_fskip(pb, asf->packet_frag_size);
732                 asf->packet_size_left -= asf->packet_frag_size;
733                 if(asf->stream_index < 0)
734                     av_log(s, AV_LOG_ERROR, "ff asf skip %d (unknown stream)\n", asf->packet_frag_size);
735                 continue;
736             }
737             asf->asf_st = s->streams[asf->stream_index]->priv_data;
738         }
739         asf_st = asf->asf_st;
740
741         if (asf->packet_replic_size == 1) {
742             // frag_offset is here used as the begining timestamp
743             asf->packet_frag_timestamp = asf->packet_time_start;
744             asf->packet_time_start += asf->packet_time_delta;
745             asf->packet_obj_size = asf->packet_frag_size = get_byte(pb);
746             asf->packet_size_left--;
747             asf->packet_multi_size--;
748             if (asf->packet_multi_size < asf->packet_obj_size)
749             {
750                 asf->packet_time_start = 0;
751                 url_fskip(pb, asf->packet_multi_size);
752                 asf->packet_size_left -= asf->packet_multi_size;
753                 continue;
754             }
755             asf->packet_multi_size -= asf->packet_obj_size;
756             //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);
757         }
758         if (   asf_st->pkt.size != asf->packet_obj_size
759             || asf_st->frag_offset + asf->packet_frag_size > asf_st->pkt.size) { //FIXME is this condition sufficient?
760             if(asf_st->pkt.data){
761                 av_log(s, AV_LOG_INFO, "freeing incomplete packet size %d, new %d\n", asf_st->pkt.size, asf->packet_obj_size);
762                 asf_st->frag_offset = 0;
763                 av_free_packet(&asf_st->pkt);
764             }
765             /* new packet */
766             av_new_packet(&asf_st->pkt, asf->packet_obj_size);
767             asf_st->seq = asf->packet_seq;
768             asf_st->pkt.pts = asf->packet_frag_timestamp;
769             asf_st->pkt.stream_index = asf->stream_index;
770             asf_st->pkt.pos =
771             asf_st->packet_pos= asf->packet_pos;
772 //printf("new packet: stream:%d key:%d packet_key:%d audio:%d size:%d\n",
773 //asf->stream_index, asf->packet_key_frame, asf_st->pkt.flags & PKT_FLAG_KEY,
774 //s->streams[asf->stream_index]->codec->codec_type == CODEC_TYPE_AUDIO, asf->packet_obj_size);
775             if (s->streams[asf->stream_index]->codec->codec_type == CODEC_TYPE_AUDIO)
776                 asf->packet_key_frame = 1;
777             if (asf->packet_key_frame)
778                 asf_st->pkt.flags |= PKT_FLAG_KEY;
779         }
780
781         /* read data */
782         //printf("READ PACKET s:%d  os:%d  o:%d,%d  l:%d   DATA:%p\n",
783         //       asf->packet_size, asf_st->pkt.size, asf->packet_frag_offset,
784         //       asf_st->frag_offset, asf->packet_frag_size, asf_st->pkt.data);
785         asf->packet_size_left -= asf->packet_frag_size;
786         if (asf->packet_size_left < 0)
787             continue;
788
789         if(   asf->packet_frag_offset >= asf_st->pkt.size
790            || asf->packet_frag_size > asf_st->pkt.size - asf->packet_frag_offset){
791             av_log(s, AV_LOG_ERROR, "packet fragment position invalid %u,%u not in %u\n",
792                 asf->packet_frag_offset, asf->packet_frag_size, asf_st->pkt.size);
793             continue;
794         }
795
796         get_buffer(pb, asf_st->pkt.data + asf->packet_frag_offset,
797                    asf->packet_frag_size);
798         asf_st->frag_offset += asf->packet_frag_size;
799         /* test if whole packet is read */
800         if (asf_st->frag_offset == asf_st->pkt.size) {
801             /* return packet */
802             if (asf_st->ds_span > 1) {
803               if(asf_st->pkt.size != asf_st->ds_packet_size * asf_st->ds_span){
804                     av_log(s, AV_LOG_ERROR, "pkt.size != ds_packet_size * ds_span\n");
805               }else{
806                 /* packet descrambling */
807                 uint8_t *newdata = av_malloc(asf_st->pkt.size);
808                 if (newdata) {
809                     int offset = 0;
810                     while (offset < asf_st->pkt.size) {
811                         int off = offset / asf_st->ds_chunk_size;
812                         int row = off / asf_st->ds_span;
813                         int col = off % asf_st->ds_span;
814                         int idx = row + col * asf_st->ds_packet_size / asf_st->ds_chunk_size;
815                         //printf("off:%d  row:%d  col:%d  idx:%d\n", off, row, col, idx);
816
817                         assert(offset + asf_st->ds_chunk_size <= asf_st->pkt.size);
818                         assert(idx+1 <= asf_st->pkt.size / asf_st->ds_chunk_size);
819                         memcpy(newdata + offset,
820                                asf_st->pkt.data + idx * asf_st->ds_chunk_size,
821                                asf_st->ds_chunk_size);
822                         offset += asf_st->ds_chunk_size;
823                     }
824                     av_free(asf_st->pkt.data);
825                     asf_st->pkt.data = newdata;
826                 }
827               }
828             }
829             asf_st->frag_offset = 0;
830             *pkt= asf_st->pkt;
831             //printf("packet %d %d\n", asf_st->pkt.size, asf->packet_frag_size);
832             asf_st->pkt.size = 0;
833             asf_st->pkt.data = 0;
834             break; // packet completed
835         }
836     }
837     return 0;
838 }
839
840 static int asf_read_close(AVFormatContext *s)
841 {
842     int i;
843
844     for(i=0;i<s->nb_streams;i++) {
845         AVStream *st = s->streams[i];
846         av_free(st->priv_data);
847         av_free(st->codec->palctrl);
848     }
849     return 0;
850 }
851
852 // Added to support seeking after packets have been read
853 // If information is not reset, read_packet fails due to
854 // leftover information from previous reads
855 static void asf_reset_header(AVFormatContext *s)
856 {
857     ASFContext *asf = s->priv_data;
858     ASFStream *asf_st;
859     int i;
860
861     asf->packet_nb_frames = 0;
862     asf->packet_size_left = 0;
863     asf->packet_segments = 0;
864     asf->packet_flags = 0;
865     asf->packet_property = 0;
866     asf->packet_timestamp = 0;
867     asf->packet_segsizetype = 0;
868     asf->packet_segments = 0;
869     asf->packet_seq = 0;
870     asf->packet_replic_size = 0;
871     asf->packet_key_frame = 0;
872     asf->packet_padsize = 0;
873     asf->packet_frag_offset = 0;
874     asf->packet_frag_size = 0;
875     asf->packet_frag_timestamp = 0;
876     asf->packet_multi_size = 0;
877     asf->packet_obj_size = 0;
878     asf->packet_time_delta = 0;
879     asf->packet_time_start = 0;
880
881     for(i=0; i<s->nb_streams; i++){
882         asf_st= s->streams[i]->priv_data;
883         av_free_packet(&asf_st->pkt);
884         asf_st->frag_offset=0;
885         asf_st->seq=0;
886     }
887     asf->asf_st= NULL;
888 }
889
890 static int64_t asf_read_pts(AVFormatContext *s, int stream_index, int64_t *ppos, int64_t pos_limit)
891 {
892     ASFContext *asf = s->priv_data;
893     AVPacket pkt1, *pkt = &pkt1;
894     ASFStream *asf_st;
895     int64_t pts;
896     int64_t pos= *ppos;
897     int i;
898     int64_t start_pos[s->nb_streams];
899
900     for(i=0; i<s->nb_streams; i++){
901         start_pos[i]= pos;
902     }
903
904     pos= (pos+asf->packet_size-1-s->data_offset)/asf->packet_size*asf->packet_size+ s->data_offset;
905     *ppos= pos;
906     url_fseek(&s->pb, pos, SEEK_SET);
907
908 //printf("asf_read_pts\n");
909     asf_reset_header(s);
910     for(;;){
911         if (av_read_frame(s, pkt) < 0){
912             av_log(s, AV_LOG_INFO, "asf_read_pts failed\n");
913             return AV_NOPTS_VALUE;
914         }
915
916         pts= pkt->pts;
917
918         av_free_packet(pkt);
919         if(pkt->flags&PKT_FLAG_KEY){
920             i= pkt->stream_index;
921
922             asf_st= s->streams[i]->priv_data;
923
924 //            assert((asf_st->packet_pos - s->data_offset) % asf->packet_size == 0);
925             pos= asf_st->packet_pos;
926
927             av_add_index_entry(s->streams[i], pos, pts, pkt->size, pos - start_pos[i] + 1, AVINDEX_KEYFRAME);
928             start_pos[i]= asf_st->packet_pos + 1;
929
930             if(pkt->stream_index == stream_index)
931                break;
932         }
933     }
934
935     *ppos= pos;
936 //printf("found keyframe at %"PRId64" stream %d stamp:%"PRId64"\n", *ppos, stream_index, pts);
937
938     return pts;
939 }
940
941 static void asf_build_simple_index(AVFormatContext *s, int stream_index)
942 {
943     GUID g;
944     ASFContext *asf = s->priv_data;
945     int64_t gsize, itime;
946     int64_t pos, current_pos, index_pts;
947     int i;
948     int pct,ict;
949
950     current_pos = url_ftell(&s->pb);
951
952     url_fseek(&s->pb, asf->data_object_offset + asf->data_object_size, SEEK_SET);
953     get_guid(&s->pb, &g);
954     if (!memcmp(&g, &index_guid, sizeof(GUID))) {
955         gsize = get_le64(&s->pb);
956         get_guid(&s->pb, &g);
957         itime=get_le64(&s->pb);
958         pct=get_le32(&s->pb);
959         ict=get_le32(&s->pb);
960         av_log(NULL, AV_LOG_DEBUG, "itime:0x%"PRIx64", pct:%d, ict:%d\n",itime,pct,ict);
961
962         for (i=0;i<ict;i++){
963             int pktnum=get_le32(&s->pb);
964             int pktct =get_le16(&s->pb);
965             av_log(NULL, AV_LOG_DEBUG, "pktnum:%d, pktct:%d\n", pktnum, pktct);
966
967             pos=s->data_offset + asf->packet_size*(int64_t)pktnum;
968             index_pts=av_rescale(itime, i, 10000);
969
970             av_add_index_entry(s->streams[stream_index], pos, index_pts, asf->packet_size, 0, AVINDEX_KEYFRAME);
971         }
972         asf->index_read= 1;
973     }
974     url_fseek(&s->pb, current_pos, SEEK_SET);
975 }
976
977 static int asf_read_seek(AVFormatContext *s, int stream_index, int64_t pts, int flags)
978 {
979     ASFContext *asf = s->priv_data;
980     AVStream *st = s->streams[stream_index];
981     int64_t pos;
982     int index;
983
984     if (asf->packet_size <= 0)
985         return -1;
986
987     if (!asf->index_read)
988         asf_build_simple_index(s, stream_index);
989
990     if(!(asf->index_read && st->index_entries)){
991         if(av_seek_frame_binary(s, stream_index, pts, flags)<0)
992             return -1;
993     }else{
994         index= av_index_search_timestamp(st, pts, flags);
995         if(index<0)
996             return -1;
997
998         /* find the position */
999         pos = st->index_entries[index].pos;
1000         pts = st->index_entries[index].timestamp;
1001
1002     // various attempts to find key frame have failed so far
1003     //    asf_reset_header(s);
1004     //    url_fseek(&s->pb, pos, SEEK_SET);
1005     //    key_pos = pos;
1006     //     for(i=0;i<16;i++){
1007     //         pos = url_ftell(&s->pb);
1008     //         if (av_read_frame(s, &pkt) < 0){
1009     //             av_log(s, AV_LOG_INFO, "seek failed\n");
1010     //             return -1;
1011     //         }
1012     //         asf_st = s->streams[stream_index]->priv_data;
1013     //         pos += st->parser->frame_offset;
1014     //
1015     //         if (pkt.size > b) {
1016     //             b = pkt.size;
1017     //             key_pos = pos;
1018     //         }
1019     //
1020     //         av_free_packet(&pkt);
1021     //     }
1022
1023         /* do the seek */
1024         av_log(NULL, AV_LOG_DEBUG, "SEEKTO: %"PRId64"\n", pos);
1025         url_fseek(&s->pb, pos, SEEK_SET);
1026     }
1027     asf_reset_header(s);
1028     return 0;
1029 }
1030
1031 AVInputFormat asf_demuxer = {
1032     "asf",
1033     "asf format",
1034     sizeof(ASFContext),
1035     asf_probe,
1036     asf_read_header,
1037     asf_read_packet,
1038     asf_read_close,
1039     asf_read_seek,
1040     asf_read_pts,
1041 };