cosmetics: Move asf_read_close() down to get rid of a forward declaration.
[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     uint32_t bitrate[128];
149
150     memset(dar, 0, sizeof(dar));
151     memset(bitrate, 0, sizeof(bitrate));
152
153     get_guid(pb, &g);
154     if (memcmp(&g, &asf_header, sizeof(GUID)))
155         goto fail;
156     get_le64(pb);
157     get_le32(pb);
158     get_byte(pb);
159     get_byte(pb);
160     memset(&asf->asfid2avid, -1, sizeof(asf->asfid2avid));
161     for(;;) {
162         get_guid(pb, &g);
163         gsize = get_le64(pb);
164 #ifdef DEBUG
165         printf("%08"PRIx64": ", url_ftell(pb) - 24);
166         print_guid(&g);
167         printf("  size=0x%"PRIx64"\n", gsize);
168 #endif
169         if (!memcmp(&g, &data_header, sizeof(GUID))) {
170             asf->data_object_offset = url_ftell(pb);
171             // if not streaming, gsize is not unlimited (how?), and there is enough space in the file..
172             if (!(asf->hdr.flags & 0x01) && gsize >= 100) {
173                 asf->data_object_size = gsize - 24;
174             } else {
175                 asf->data_object_size = (uint64_t)-1;
176             }
177             break;
178         }
179         if (gsize < 24)
180             goto fail;
181         if (!memcmp(&g, &file_header, sizeof(GUID))) {
182             get_guid(pb, &asf->hdr.guid);
183             asf->hdr.file_size          = get_le64(pb);
184             asf->hdr.create_time        = get_le64(pb);
185             asf->nb_packets             = get_le64(pb);
186             asf->hdr.send_time          = get_le64(pb);
187             asf->hdr.play_time          = get_le64(pb);
188             asf->hdr.preroll            = get_le32(pb);
189             asf->hdr.ignore             = get_le32(pb);
190             asf->hdr.flags              = get_le32(pb);
191             asf->hdr.min_pktsize        = get_le32(pb);
192             asf->hdr.max_pktsize        = get_le32(pb);
193             asf->hdr.max_bitrate        = get_le32(pb);
194             asf->packet_size = asf->hdr.max_pktsize;
195         } else if (!memcmp(&g, &stream_header, sizeof(GUID))) {
196             int type, type_specific_size, sizeX;
197             uint64_t total_size;
198             unsigned int tag1;
199             int64_t pos1, pos2, start_time;
200             int test_for_ext_stream_audio, is_dvr_ms_audio=0;
201
202             pos1 = url_ftell(pb);
203
204             st = av_new_stream(s, 0);
205             if (!st)
206                 goto fail;
207             av_set_pts_info(st, 32, 1, 1000); /* 32 bit pts in ms */
208             asf_st = av_mallocz(sizeof(ASFStream));
209             if (!asf_st)
210                 goto fail;
211             st->priv_data = asf_st;
212             start_time = asf->hdr.preroll;
213
214             if(!(asf->hdr.flags & 0x01)) { // if we aren't streaming...
215                 st->duration = asf->hdr.send_time /
216                     (10000000 / 1000) - start_time;
217             }
218             get_guid(pb, &g);
219
220             test_for_ext_stream_audio = 0;
221             if (!memcmp(&g, &audio_stream, sizeof(GUID))) {
222                 type = CODEC_TYPE_AUDIO;
223             } else if (!memcmp(&g, &video_stream, sizeof(GUID))) {
224                 type = CODEC_TYPE_VIDEO;
225             } else if (!memcmp(&g, &command_stream, sizeof(GUID))) {
226                 type = CODEC_TYPE_UNKNOWN;
227             } else if (!memcmp(&g, &ext_stream_embed_stream_header, sizeof(GUID))) {
228                 test_for_ext_stream_audio = 1;
229                 type = CODEC_TYPE_UNKNOWN;
230             } else {
231                 goto fail;
232             }
233             get_guid(pb, &g);
234             total_size = get_le64(pb);
235             type_specific_size = get_le32(pb);
236             get_le32(pb);
237             st->id = get_le16(pb) & 0x7f; /* stream id */
238             // mapping of asf ID to AV stream ID;
239             asf->asfid2avid[st->id] = s->nb_streams - 1;
240
241             get_le32(pb);
242
243             if (test_for_ext_stream_audio) {
244                 get_guid(pb, &g);
245                 if (!memcmp(&g, &ext_stream_audio_stream, sizeof(GUID))) {
246                     type = CODEC_TYPE_AUDIO;
247                     is_dvr_ms_audio=1;
248                     get_guid(pb, &g);
249                     get_le32(pb);
250                     get_le32(pb);
251                     get_le32(pb);
252                     get_guid(pb, &g);
253                     get_le32(pb);
254                 }
255             }
256
257             st->codec->codec_type = type;
258             if (type == CODEC_TYPE_AUDIO) {
259                 get_wav_header(pb, st->codec, type_specific_size);
260                 if (is_dvr_ms_audio) {
261                     // codec_id and codec_tag are unreliable in dvr_ms
262                     // files. Set them later by probing stream.
263                     st->codec->codec_id = CODEC_ID_NONE;
264                     st->codec->codec_tag = 0;
265                 }
266                 st->need_parsing = AVSTREAM_PARSE_FULL;
267                 /* We have to init the frame size at some point .... */
268                 pos2 = url_ftell(pb);
269                 if (gsize >= (pos2 + 8 - pos1 + 24)) {
270                     asf_st->ds_span = get_byte(pb);
271                     asf_st->ds_packet_size = get_le16(pb);
272                     asf_st->ds_chunk_size = get_le16(pb);
273                     get_le16(pb); //ds_data_size
274                     get_byte(pb); //ds_silence_data
275                 }
276                 //printf("Descrambling: ps:%d cs:%d ds:%d s:%d  sd:%d\n",
277                 //       asf_st->ds_packet_size, asf_st->ds_chunk_size,
278                 //       asf_st->ds_data_size, asf_st->ds_span, asf_st->ds_silence_data);
279                 if (asf_st->ds_span > 1) {
280                     if (!asf_st->ds_chunk_size
281                         || (asf_st->ds_packet_size/asf_st->ds_chunk_size <= 1)
282                         || asf_st->ds_packet_size % asf_st->ds_chunk_size)
283                         asf_st->ds_span = 0; // disable descrambling
284                 }
285                 switch (st->codec->codec_id) {
286                 case CODEC_ID_MP3:
287                     st->codec->frame_size = MPA_FRAME_SIZE;
288                     break;
289                 case CODEC_ID_PCM_S16LE:
290                 case CODEC_ID_PCM_S16BE:
291                 case CODEC_ID_PCM_U16LE:
292                 case CODEC_ID_PCM_U16BE:
293                 case CODEC_ID_PCM_S8:
294                 case CODEC_ID_PCM_U8:
295                 case CODEC_ID_PCM_ALAW:
296                 case CODEC_ID_PCM_MULAW:
297                     st->codec->frame_size = 1;
298                     break;
299                 default:
300                     /* This is probably wrong, but it prevents a crash later */
301                     st->codec->frame_size = 1;
302                     break;
303                 }
304             } else if (type == CODEC_TYPE_VIDEO) {
305                 get_le32(pb);
306                 get_le32(pb);
307                 get_byte(pb);
308                 size = get_le16(pb); /* size */
309                 sizeX= get_le32(pb); /* size */
310                 st->codec->width = get_le32(pb);
311                 st->codec->height = get_le32(pb);
312                 /* not available for asf */
313                 get_le16(pb); /* panes */
314                 st->codec->bits_per_sample = get_le16(pb); /* depth */
315                 tag1 = get_le32(pb);
316                 url_fskip(pb, 20);
317 //                av_log(NULL, AV_LOG_DEBUG, "size:%d tsize:%d sizeX:%d\n", size, total_size, sizeX);
318                 size= sizeX;
319                 if (size > 40) {
320                     st->codec->extradata_size = size - 40;
321                     st->codec->extradata = av_mallocz(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
322                     get_buffer(pb, st->codec->extradata, st->codec->extradata_size);
323                 }
324
325         /* Extract palette from extradata if bpp <= 8 */
326         /* This code assumes that extradata contains only palette */
327         /* This is true for all paletted codecs implemented in ffmpeg */
328         if (st->codec->extradata_size && (st->codec->bits_per_sample <= 8)) {
329             st->codec->palctrl = av_mallocz(sizeof(AVPaletteControl));
330 #ifdef WORDS_BIGENDIAN
331             for (i = 0; i < FFMIN(st->codec->extradata_size, AVPALETTE_SIZE)/4; i++)
332                 st->codec->palctrl->palette[i] = bswap_32(((uint32_t*)st->codec->extradata)[i]);
333 #else
334             memcpy(st->codec->palctrl->palette, st->codec->extradata,
335                    FFMIN(st->codec->extradata_size, AVPALETTE_SIZE));
336 #endif
337             st->codec->palctrl->palette_changed = 1;
338         }
339
340                 st->codec->codec_tag = tag1;
341                 st->codec->codec_id = codec_get_id(codec_bmp_tags, tag1);
342                 if(tag1 == MKTAG('D', 'V', 'R', ' '))
343                     st->need_parsing = AVSTREAM_PARSE_FULL;
344             }
345             pos2 = url_ftell(pb);
346             url_fskip(pb, gsize - (pos2 - pos1 + 24));
347         } else if (!memcmp(&g, &comment_header, sizeof(GUID))) {
348             int len1, len2, len3, len4, len5;
349
350             len1 = get_le16(pb);
351             len2 = get_le16(pb);
352             len3 = get_le16(pb);
353             len4 = get_le16(pb);
354             len5 = get_le16(pb);
355             get_str16_nolen(pb, len1, s->title    , sizeof(s->title));
356             get_str16_nolen(pb, len2, s->author   , sizeof(s->author));
357             get_str16_nolen(pb, len3, s->copyright, sizeof(s->copyright));
358             get_str16_nolen(pb, len4, s->comment  , sizeof(s->comment));
359             url_fskip(pb, len5);
360         } else if (!memcmp(&g, &stream_bitrate_guid, sizeof(GUID))) {
361             int stream_count = get_le16(pb);
362             int j;
363
364 //            av_log(NULL, AV_LOG_ERROR, "stream bitrate properties\n");
365 //            av_log(NULL, AV_LOG_ERROR, "streams %d\n", streams);
366             for(j = 0; j < stream_count; j++) {
367                 int flags, bitrate, stream_id;
368
369                 flags= get_le16(pb);
370                 bitrate= get_le32(pb);
371                 stream_id= (flags & 0x7f);
372 //                av_log(NULL, AV_LOG_ERROR, "flags: 0x%x stream id %d, bitrate %d\n", flags, stream_id, bitrate);
373                 asf->stream_bitrates[stream_id]= bitrate;
374             }
375        } else if (!memcmp(&g, &extended_content_header, sizeof(GUID))) {
376                 int desc_count, i;
377
378                 desc_count = get_le16(pb);
379                 for(i=0;i<desc_count;i++)
380                 {
381                         int name_len,value_type,value_len;
382                         uint64_t value_num = 0;
383                         char name[1024];
384
385                         name_len = get_le16(pb);
386                         get_str16_nolen(pb, name_len, name, sizeof(name));
387                         value_type = get_le16(pb);
388                         value_len = get_le16(pb);
389                         if ((value_type == 0) || (value_type == 1)) // unicode or byte
390                         {
391                                 if     (!strcmp(name,"WM/AlbumTitle")) get_str16_nolen(pb, value_len, s->album, sizeof(s->album));
392                                 else if(!strcmp(name,"WM/Genre"     )) get_str16_nolen(pb, value_len, s->genre, sizeof(s->genre));
393                                 else if(!strcmp(name,"WM/Track") && s->track == 0) {
394                                     char track[8];
395                                     get_str16_nolen(pb, value_len, track, sizeof(track));
396                                     s->track = strtol(track, NULL, 10) + 1;
397                                 }
398                                 else if(!strcmp(name,"WM/TrackNumber")) {
399                                     char track[8];
400                                     get_str16_nolen(pb, value_len, track, sizeof(track));
401                                     s->track = strtol(track, NULL, 10);
402                                 }
403                                 else url_fskip(pb, value_len);
404                         }
405                         if ((value_type >= 2) && (value_type <= 5)) // boolean or DWORD or QWORD or WORD
406                         {
407                                 value_num= get_value(pb, value_type);
408                                 if (!strcmp(name,"WM/Track"      ) && s->track == 0) s->track = value_num + 1;
409                                 if (!strcmp(name,"WM/TrackNumber")) s->track = value_num;
410                         }
411                 }
412         } else if (!memcmp(&g, &metadata_header, sizeof(GUID))) {
413             int n, stream_num, name_len, value_len, value_type, value_num;
414             n = get_le16(pb);
415
416             for(i=0;i<n;i++) {
417                 char name[1024];
418
419                 get_le16(pb); //lang_list_index
420                 stream_num= get_le16(pb);
421                 name_len=   get_le16(pb);
422                 value_type= get_le16(pb);
423                 value_len=  get_le32(pb);
424
425                 get_str16_nolen(pb, name_len, name, sizeof(name));
426 //av_log(NULL, AV_LOG_ERROR, "%d %d %d %d %d <%s>\n", i, stream_num, name_len, value_type, value_len, name);
427                 value_num= get_le16(pb);//we should use get_value() here but it does not work 2 is le16 here but le32 elsewhere
428                 url_fskip(pb, value_len - 2);
429
430                 if(stream_num<128){
431                     if     (!strcmp(name, "AspectRatioX")) dar[stream_num].num= value_num;
432                     else if(!strcmp(name, "AspectRatioY")) dar[stream_num].den= value_num;
433                 }
434             }
435         } else if (!memcmp(&g, &ext_stream_header, sizeof(GUID))) {
436             int ext_len, payload_ext_ct, stream_ct;
437             uint32_t ext_d, leak_rate, stream_num;
438             int64_t pos_ex_st;
439             pos_ex_st = url_ftell(pb);
440
441             get_le64(pb); // starttime
442             get_le64(pb); // endtime
443             leak_rate = get_le32(pb); // leak-datarate
444             get_le32(pb); // bucket-datasize
445             get_le32(pb); // init-bucket-fullness
446             get_le32(pb); // alt-leak-datarate
447             get_le32(pb); // alt-bucket-datasize
448             get_le32(pb); // alt-init-bucket-fullness
449             get_le32(pb); // max-object-size
450             get_le32(pb); // flags (reliable,seekable,no_cleanpoints?,resend-live-cleanpoints, rest of bits reserved)
451             stream_num = get_le16(pb); // stream-num
452             get_le16(pb); // stream-language-id-index
453             get_le64(pb); // avg frametime in 100ns units
454             stream_ct = get_le16(pb); //stream-name-count
455             payload_ext_ct = get_le16(pb); //payload-extension-system-count
456
457             if (stream_num < 128)
458                 bitrate[stream_num] = leak_rate;
459
460             for (i=0; i<stream_ct; i++){
461                 get_le16(pb);
462                 ext_len = get_le16(pb);
463                 url_fseek(pb, ext_len, SEEK_CUR);
464             }
465
466             for (i=0; i<payload_ext_ct; i++){
467                 get_guid(pb, &g);
468                 ext_d=get_le16(pb);
469                 ext_len=get_le32(pb);
470                 url_fseek(pb, ext_len, SEEK_CUR);
471             }
472
473             // there could be a optional stream properties object to follow
474             // if so the next iteration will pick it up
475         } else if (!memcmp(&g, &head1_guid, sizeof(GUID))) {
476             int v1, v2;
477             get_guid(pb, &g);
478             v1 = get_le32(pb);
479             v2 = get_le16(pb);
480 #if 0
481         } else if (!memcmp(&g, &codec_comment_header, sizeof(GUID))) {
482             int len, v1, n, num;
483             char str[256], *q;
484             char tag[16];
485
486             get_guid(pb, &g);
487             print_guid(&g);
488
489             n = get_le32(pb);
490             for(i=0;i<n;i++) {
491                 num = get_le16(pb); /* stream number */
492                 get_str16(pb, str, sizeof(str));
493                 get_str16(pb, str, sizeof(str));
494                 len = get_le16(pb);
495                 q = tag;
496                 while (len > 0) {
497                     v1 = get_byte(pb);
498                     if ((q - tag) < sizeof(tag) - 1)
499                         *q++ = v1;
500                     len--;
501                 }
502                 *q = '\0';
503             }
504 #endif
505         } else if (url_feof(pb)) {
506             goto fail;
507         } else {
508             url_fseek(pb, gsize - 24, SEEK_CUR);
509         }
510     }
511     get_guid(pb, &g);
512     get_le64(pb);
513     get_byte(pb);
514     get_byte(pb);
515     if (url_feof(pb))
516         goto fail;
517     asf->data_offset = url_ftell(pb);
518     asf->packet_size_left = 0;
519
520
521     for(i=0; i<128; i++){
522         int stream_num= asf->asfid2avid[i];
523         if(stream_num>=0){
524             AVCodecContext *codec= s->streams[stream_num]->codec;
525             if (!codec->bit_rate)
526                 codec->bit_rate = bitrate[i];
527             if (dar[i].num > 0 && dar[i].den > 0)
528                 av_reduce(&codec->sample_aspect_ratio.num,
529                           &codec->sample_aspect_ratio.den,
530                           dar[i].num, dar[i].den, INT_MAX);
531 //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);
532         }
533     }
534
535     return 0;
536
537  fail:
538      for(i=0;i<s->nb_streams;i++) {
539         AVStream *st = s->streams[i];
540         if (st) {
541             av_free(st->priv_data);
542             av_free(st->codec->extradata);
543         }
544         av_free(st);
545     }
546     return -1;
547 }
548
549 #define DO_2BITS(bits, var, defval) \
550     switch (bits & 3) \
551     { \
552     case 3: var = get_le32(pb); rsize += 4; break; \
553     case 2: var = get_le16(pb); rsize += 2; break; \
554     case 1: var = get_byte(pb); rsize++; break; \
555     default: var = defval; break; \
556     }
557
558 /**
559  *
560  * @return <0 in case of an error
561  */
562 static int asf_get_packet(AVFormatContext *s)
563 {
564     ASFContext *asf = s->priv_data;
565     ByteIOContext *pb = &s->pb;
566     uint32_t packet_length, padsize;
567     int rsize = 8;
568     int c, d, e, off;
569
570     off= (url_ftell(&s->pb) - s->data_offset) % asf->packet_size + 3;
571
572     c=d=e=-1;
573     while(off-- > 0){
574         c=d; d=e;
575         e= get_byte(pb);
576         if(c == 0x82 && !d && !e)
577             break;
578     }
579
580     if (c != 0x82) {
581         if (!url_feof(pb))
582             av_log(s, AV_LOG_ERROR, "ff asf bad header %x  at:%"PRId64"\n", c, url_ftell(pb));
583     }
584     if ((c & 0x8f) == 0x82) {
585         if (d || e) {
586             if (!url_feof(pb))
587                 av_log(s, AV_LOG_ERROR, "ff asf bad non zero\n");
588             return -1;
589         }
590         c= get_byte(pb);
591         d= get_byte(pb);
592         rsize+=3;
593     }else{
594         url_fseek(pb, -1, SEEK_CUR); //FIXME
595     }
596
597     asf->packet_flags    = c;
598     asf->packet_property = d;
599
600     DO_2BITS(asf->packet_flags >> 5, packet_length, asf->packet_size);
601     DO_2BITS(asf->packet_flags >> 1, padsize, 0); // sequence ignored
602     DO_2BITS(asf->packet_flags >> 3, padsize, 0); // padding length
603
604     //the following checks prevent overflows and infinite loops
605     if(packet_length >= (1U<<29)){
606         av_log(s, AV_LOG_ERROR, "invalid packet_length %d at:%"PRId64"\n", packet_length, url_ftell(pb));
607         return -1;
608     }
609     if(padsize >= packet_length){
610         av_log(s, AV_LOG_ERROR, "invalid padsize %d at:%"PRId64"\n", padsize, url_ftell(pb));
611         return -1;
612     }
613
614     asf->packet_timestamp = get_le32(pb);
615     get_le16(pb); /* duration */
616     // rsize has at least 11 bytes which have to be present
617
618     if (asf->packet_flags & 0x01) {
619         asf->packet_segsizetype = get_byte(pb); rsize++;
620         asf->packet_segments = asf->packet_segsizetype & 0x3f;
621     } else {
622         asf->packet_segments = 1;
623         asf->packet_segsizetype = 0x80;
624     }
625     asf->packet_size_left = packet_length - padsize - rsize;
626     if (packet_length < asf->hdr.min_pktsize)
627         padsize += asf->hdr.min_pktsize - packet_length;
628     asf->packet_padsize = padsize;
629 #ifdef DEBUG
630     printf("packet: size=%d padsize=%d  left=%d\n", asf->packet_size, asf->packet_padsize, asf->packet_size_left);
631 #endif
632     return 0;
633 }
634
635 /**
636  *
637  * @return <0 if error
638  */
639 static int asf_read_frame_header(AVFormatContext *s){
640     ASFContext *asf = s->priv_data;
641     ByteIOContext *pb = &s->pb;
642     int rsize = 1;
643     int num = get_byte(pb);
644     int64_t ts0, ts1;
645
646     asf->packet_segments--;
647     asf->packet_key_frame = num >> 7;
648     asf->stream_index = asf->asfid2avid[num & 0x7f];
649     // sequence should be ignored!
650     DO_2BITS(asf->packet_property >> 4, asf->packet_seq, 0);
651     DO_2BITS(asf->packet_property >> 2, asf->packet_frag_offset, 0);
652     DO_2BITS(asf->packet_property, asf->packet_replic_size, 0);
653 //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);
654     if (asf->packet_replic_size >= 8) {
655         asf->packet_obj_size = get_le32(pb);
656         if(asf->packet_obj_size >= (1<<24) || asf->packet_obj_size <= 0){
657             av_log(s, AV_LOG_ERROR, "packet_obj_size invalid\n");
658             return -1;
659         }
660         asf->packet_frag_timestamp = get_le32(pb); // timestamp
661         if(asf->packet_replic_size >= 8+38+4){
662 //            for(i=0; i<asf->packet_replic_size-8; i++)
663 //                av_log(s, AV_LOG_DEBUG, "%02X ",get_byte(pb));
664 //            av_log(s, AV_LOG_DEBUG, "\n");
665             url_fskip(pb, 10);
666             ts0= get_le64(pb);
667             ts1= get_le64(pb);
668             url_fskip(pb, 12);
669             get_le32(pb);
670             url_fskip(pb, asf->packet_replic_size - 8 - 38 - 4);
671             if(ts0!= -1) asf->packet_frag_timestamp= ts0/10000;
672             else         asf->packet_frag_timestamp= AV_NOPTS_VALUE;
673         }else
674             url_fskip(pb, asf->packet_replic_size - 8);
675         rsize += asf->packet_replic_size; // FIXME - check validity
676     } else if (asf->packet_replic_size==1){
677         // multipacket - frag_offset is begining timestamp
678         asf->packet_time_start = asf->packet_frag_offset;
679         asf->packet_frag_offset = 0;
680         asf->packet_frag_timestamp = asf->packet_timestamp;
681
682         asf->packet_time_delta = get_byte(pb);
683         rsize++;
684     }else if(asf->packet_replic_size!=0){
685         av_log(s, AV_LOG_ERROR, "unexpected packet_replic_size of %d\n", asf->packet_replic_size);
686         return -1;
687     }
688     if (asf->packet_flags & 0x01) {
689         DO_2BITS(asf->packet_segsizetype >> 6, asf->packet_frag_size, 0); // 0 is illegal
690         if(asf->packet_frag_size > asf->packet_size_left - rsize){
691             av_log(s, AV_LOG_ERROR, "packet_frag_size is invalid\n");
692             return -1;
693         }
694         //printf("Fragsize %d\n", asf->packet_frag_size);
695     } else {
696         asf->packet_frag_size = asf->packet_size_left - rsize;
697         //printf("Using rest  %d %d %d\n", asf->packet_frag_size, asf->packet_size_left, rsize);
698     }
699     if (asf->packet_replic_size == 1) {
700         asf->packet_multi_size = asf->packet_frag_size;
701         if (asf->packet_multi_size > asf->packet_size_left)
702             return -1;
703     }
704     asf->packet_size_left -= rsize;
705     //printf("___objsize____  %d   %d    rs:%d\n", asf->packet_obj_size, asf->packet_frag_offset, rsize);
706
707     return 0;
708 }
709
710 static int asf_read_packet(AVFormatContext *s, AVPacket *pkt)
711 {
712     ASFContext *asf = s->priv_data;
713     ASFStream *asf_st = 0;
714     ByteIOContext *pb = &s->pb;
715     //static int pc = 0;
716     for (;;) {
717         if(url_feof(pb))
718             return AVERROR(EIO);
719         if (asf->packet_size_left < FRAME_HEADER_SIZE
720             || asf->packet_segments < 1) {
721             //asf->packet_size_left <= asf->packet_padsize) {
722             int ret = asf->packet_size_left + asf->packet_padsize;
723             //printf("PacketLeftSize:%d  Pad:%d Pos:%"PRId64"\n", asf->packet_size_left, asf->packet_padsize, url_ftell(pb));
724             assert(ret>=0);
725             /* fail safe */
726             url_fskip(pb, ret);
727
728             asf->packet_pos= url_ftell(&s->pb);
729             if (asf->data_object_size != (uint64_t)-1 &&
730                 (asf->packet_pos - asf->data_object_offset >= asf->data_object_size))
731                 return AVERROR(EIO); /* Do not exceed the size of the data object */
732             ret = asf_get_packet(s);
733             //printf("READ ASF PACKET  %d   r:%d   c:%d\n", ret, asf->packet_size_left, pc++);
734             if (ret < 0)
735                 assert(asf->packet_size_left < FRAME_HEADER_SIZE || asf->packet_segments < 1);
736             asf->packet_time_start = 0;
737             continue;
738         }
739         if (asf->packet_time_start == 0) {
740             if(asf_read_frame_header(s) < 0){
741                 asf->packet_segments= 0;
742                 continue;
743             }
744             if (asf->stream_index < 0
745                 || s->streams[asf->stream_index]->discard >= AVDISCARD_ALL
746                 || (!asf->packet_key_frame && s->streams[asf->stream_index]->discard >= AVDISCARD_NONKEY)
747                 ) {
748                 asf->packet_time_start = 0;
749                 /* unhandled packet (should not happen) */
750                 url_fskip(pb, asf->packet_frag_size);
751                 asf->packet_size_left -= asf->packet_frag_size;
752                 if(asf->stream_index < 0)
753                     av_log(s, AV_LOG_ERROR, "ff asf skip %d (unknown stream)\n", asf->packet_frag_size);
754                 continue;
755             }
756             asf->asf_st = s->streams[asf->stream_index]->priv_data;
757         }
758         asf_st = asf->asf_st;
759
760         if (asf->packet_replic_size == 1) {
761             // frag_offset is here used as the begining timestamp
762             asf->packet_frag_timestamp = asf->packet_time_start;
763             asf->packet_time_start += asf->packet_time_delta;
764             asf->packet_obj_size = asf->packet_frag_size = get_byte(pb);
765             asf->packet_size_left--;
766             asf->packet_multi_size--;
767             if (asf->packet_multi_size < asf->packet_obj_size)
768             {
769                 asf->packet_time_start = 0;
770                 url_fskip(pb, asf->packet_multi_size);
771                 asf->packet_size_left -= asf->packet_multi_size;
772                 continue;
773             }
774             asf->packet_multi_size -= asf->packet_obj_size;
775             //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);
776         }
777         if(   /*asf->packet_frag_size == asf->packet_obj_size*/
778               asf_st->frag_offset + asf->packet_frag_size <= asf_st->pkt.size
779            && asf_st->frag_offset + asf->packet_frag_size > asf->packet_obj_size){
780             av_log(s, AV_LOG_INFO, "ignoring invalid packet_obj_size (%d %d %d %d)\n",
781                 asf_st->frag_offset, asf->packet_frag_size,
782                 asf->packet_obj_size, asf_st->pkt.size);
783             asf->packet_obj_size= asf_st->pkt.size;
784         }
785
786         if (   asf_st->pkt.size != asf->packet_obj_size
787             || asf_st->frag_offset + asf->packet_frag_size > asf_st->pkt.size) { //FIXME is this condition sufficient?
788             if(asf_st->pkt.data){
789                 av_log(s, AV_LOG_INFO, "freeing incomplete packet size %d, new %d\n", asf_st->pkt.size, asf->packet_obj_size);
790                 asf_st->frag_offset = 0;
791                 av_free_packet(&asf_st->pkt);
792             }
793             /* new packet */
794             av_new_packet(&asf_st->pkt, asf->packet_obj_size);
795             asf_st->seq = asf->packet_seq;
796             asf_st->pkt.pts = asf->packet_frag_timestamp;
797             asf_st->pkt.stream_index = asf->stream_index;
798             asf_st->pkt.pos =
799             asf_st->packet_pos= asf->packet_pos;
800 //printf("new packet: stream:%d key:%d packet_key:%d audio:%d size:%d\n",
801 //asf->stream_index, asf->packet_key_frame, asf_st->pkt.flags & PKT_FLAG_KEY,
802 //s->streams[asf->stream_index]->codec->codec_type == CODEC_TYPE_AUDIO, asf->packet_obj_size);
803             if (s->streams[asf->stream_index]->codec->codec_type == CODEC_TYPE_AUDIO)
804                 asf->packet_key_frame = 1;
805             if (asf->packet_key_frame)
806                 asf_st->pkt.flags |= PKT_FLAG_KEY;
807         }
808
809         /* read data */
810         //printf("READ PACKET s:%d  os:%d  o:%d,%d  l:%d   DATA:%p\n",
811         //       asf->packet_size, asf_st->pkt.size, asf->packet_frag_offset,
812         //       asf_st->frag_offset, asf->packet_frag_size, asf_st->pkt.data);
813         asf->packet_size_left -= asf->packet_frag_size;
814         if (asf->packet_size_left < 0)
815             continue;
816
817         if(   asf->packet_frag_offset >= asf_st->pkt.size
818            || asf->packet_frag_size > asf_st->pkt.size - asf->packet_frag_offset){
819             av_log(s, AV_LOG_ERROR, "packet fragment position invalid %u,%u not in %u\n",
820                 asf->packet_frag_offset, asf->packet_frag_size, asf_st->pkt.size);
821             continue;
822         }
823
824         get_buffer(pb, asf_st->pkt.data + asf->packet_frag_offset,
825                    asf->packet_frag_size);
826         asf_st->frag_offset += asf->packet_frag_size;
827         /* test if whole packet is read */
828         if (asf_st->frag_offset == asf_st->pkt.size) {
829             //workaround for macroshit radio DVR-MS files
830             if(   s->streams[asf->stream_index]->codec->codec_id == CODEC_ID_MPEG2VIDEO
831                && asf_st->pkt.size > 100){
832                 int i;
833                 for(i=0; i<asf_st->pkt.size && !asf_st->pkt.data[i]; i++);
834                 if(i == asf_st->pkt.size){
835                     av_log(s, AV_LOG_DEBUG, "discarding ms fart\n");
836                     asf_st->frag_offset = 0;
837                     av_free_packet(&asf_st->pkt);
838                     continue;
839                 }
840             }
841
842             /* return packet */
843             if (asf_st->ds_span > 1) {
844               if(asf_st->pkt.size != asf_st->ds_packet_size * asf_st->ds_span){
845                     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);
846               }else{
847                 /* packet descrambling */
848                 uint8_t *newdata = av_malloc(asf_st->pkt.size);
849                 if (newdata) {
850                     int offset = 0;
851                     while (offset < asf_st->pkt.size) {
852                         int off = offset / asf_st->ds_chunk_size;
853                         int row = off / asf_st->ds_span;
854                         int col = off % asf_st->ds_span;
855                         int idx = row + col * asf_st->ds_packet_size / asf_st->ds_chunk_size;
856                         //printf("off:%d  row:%d  col:%d  idx:%d\n", off, row, col, idx);
857
858                         assert(offset + asf_st->ds_chunk_size <= asf_st->pkt.size);
859                         assert(idx+1 <= asf_st->pkt.size / asf_st->ds_chunk_size);
860                         memcpy(newdata + offset,
861                                asf_st->pkt.data + idx * asf_st->ds_chunk_size,
862                                asf_st->ds_chunk_size);
863                         offset += asf_st->ds_chunk_size;
864                     }
865                     av_free(asf_st->pkt.data);
866                     asf_st->pkt.data = newdata;
867                 }
868               }
869             }
870             asf_st->frag_offset = 0;
871             *pkt= asf_st->pkt;
872             //printf("packet %d %d\n", asf_st->pkt.size, asf->packet_frag_size);
873             asf_st->pkt.size = 0;
874             asf_st->pkt.data = 0;
875             break; // packet completed
876         }
877     }
878     return 0;
879 }
880
881 // Added to support seeking after packets have been read
882 // If information is not reset, read_packet fails due to
883 // leftover information from previous reads
884 static void asf_reset_header(AVFormatContext *s)
885 {
886     ASFContext *asf = s->priv_data;
887     ASFStream *asf_st;
888     int i;
889
890     asf->packet_nb_frames = 0;
891     asf->packet_size_left = 0;
892     asf->packet_segments = 0;
893     asf->packet_flags = 0;
894     asf->packet_property = 0;
895     asf->packet_timestamp = 0;
896     asf->packet_segsizetype = 0;
897     asf->packet_segments = 0;
898     asf->packet_seq = 0;
899     asf->packet_replic_size = 0;
900     asf->packet_key_frame = 0;
901     asf->packet_padsize = 0;
902     asf->packet_frag_offset = 0;
903     asf->packet_frag_size = 0;
904     asf->packet_frag_timestamp = 0;
905     asf->packet_multi_size = 0;
906     asf->packet_obj_size = 0;
907     asf->packet_time_delta = 0;
908     asf->packet_time_start = 0;
909
910     for(i=0; i<s->nb_streams; i++){
911         asf_st= s->streams[i]->priv_data;
912         av_free_packet(&asf_st->pkt);
913         asf_st->frag_offset=0;
914         asf_st->seq=0;
915     }
916     asf->asf_st= NULL;
917 }
918
919 static int asf_read_close(AVFormatContext *s)
920 {
921     int i;
922
923     asf_reset_header(s);
924     for(i=0;i<s->nb_streams;i++) {
925         AVStream *st = s->streams[i];
926         av_free(st->priv_data);
927         av_free(st->codec->palctrl);
928     }
929     return 0;
930 }
931
932 static int64_t asf_read_pts(AVFormatContext *s, int stream_index, int64_t *ppos, int64_t pos_limit)
933 {
934     ASFContext *asf = s->priv_data;
935     AVPacket pkt1, *pkt = &pkt1;
936     ASFStream *asf_st;
937     int64_t pts;
938     int64_t pos= *ppos;
939     int i;
940     int64_t start_pos[s->nb_streams];
941
942     for(i=0; i<s->nb_streams; i++){
943         start_pos[i]= pos;
944     }
945
946     pos= (pos+asf->packet_size-1-s->data_offset)/asf->packet_size*asf->packet_size+ s->data_offset;
947     *ppos= pos;
948     url_fseek(&s->pb, pos, SEEK_SET);
949
950 //printf("asf_read_pts\n");
951     asf_reset_header(s);
952     for(;;){
953         if (av_read_frame(s, pkt) < 0){
954             av_log(s, AV_LOG_INFO, "asf_read_pts failed\n");
955             return AV_NOPTS_VALUE;
956         }
957
958         pts= pkt->pts;
959
960         av_free_packet(pkt);
961         if(pkt->flags&PKT_FLAG_KEY){
962             i= pkt->stream_index;
963
964             asf_st= s->streams[i]->priv_data;
965
966 //            assert((asf_st->packet_pos - s->data_offset) % asf->packet_size == 0);
967             pos= asf_st->packet_pos;
968
969             av_add_index_entry(s->streams[i], pos, pts, pkt->size, pos - start_pos[i] + 1, AVINDEX_KEYFRAME);
970             start_pos[i]= asf_st->packet_pos + 1;
971
972             if(pkt->stream_index == stream_index)
973                break;
974         }
975     }
976
977     *ppos= pos;
978 //printf("found keyframe at %"PRId64" stream %d stamp:%"PRId64"\n", *ppos, stream_index, pts);
979
980     return pts;
981 }
982
983 static void asf_build_simple_index(AVFormatContext *s, int stream_index)
984 {
985     GUID g;
986     ASFContext *asf = s->priv_data;
987     int64_t gsize, itime;
988     int64_t pos, current_pos, index_pts;
989     int i;
990     int pct,ict;
991
992     current_pos = url_ftell(&s->pb);
993
994     url_fseek(&s->pb, asf->data_object_offset + asf->data_object_size, SEEK_SET);
995     get_guid(&s->pb, &g);
996     if (!memcmp(&g, &index_guid, sizeof(GUID))) {
997         gsize = get_le64(&s->pb);
998         get_guid(&s->pb, &g);
999         itime=get_le64(&s->pb);
1000         pct=get_le32(&s->pb);
1001         ict=get_le32(&s->pb);
1002         av_log(NULL, AV_LOG_DEBUG, "itime:0x%"PRIx64", pct:%d, ict:%d\n",itime,pct,ict);
1003
1004         for (i=0;i<ict;i++){
1005             int pktnum=get_le32(&s->pb);
1006             int pktct =get_le16(&s->pb);
1007             av_log(NULL, AV_LOG_DEBUG, "pktnum:%d, pktct:%d\n", pktnum, pktct);
1008
1009             pos=s->data_offset + asf->packet_size*(int64_t)pktnum;
1010             index_pts=av_rescale(itime, i, 10000);
1011
1012             av_add_index_entry(s->streams[stream_index], pos, index_pts, asf->packet_size, 0, AVINDEX_KEYFRAME);
1013         }
1014         asf->index_read= 1;
1015     }
1016     url_fseek(&s->pb, current_pos, SEEK_SET);
1017 }
1018
1019 static int asf_read_seek(AVFormatContext *s, int stream_index, int64_t pts, int flags)
1020 {
1021     ASFContext *asf = s->priv_data;
1022     AVStream *st = s->streams[stream_index];
1023     int64_t pos;
1024     int index;
1025
1026     if (asf->packet_size <= 0)
1027         return -1;
1028
1029     if (!asf->index_read)
1030         asf_build_simple_index(s, stream_index);
1031
1032     if(!(asf->index_read && st->index_entries)){
1033         if(av_seek_frame_binary(s, stream_index, pts, flags)<0)
1034             return -1;
1035     }else{
1036         index= av_index_search_timestamp(st, pts, flags);
1037         if(index<0)
1038             return -1;
1039
1040         /* find the position */
1041         pos = st->index_entries[index].pos;
1042         pts = st->index_entries[index].timestamp;
1043
1044     // various attempts to find key frame have failed so far
1045     //    asf_reset_header(s);
1046     //    url_fseek(&s->pb, pos, SEEK_SET);
1047     //    key_pos = pos;
1048     //     for(i=0;i<16;i++){
1049     //         pos = url_ftell(&s->pb);
1050     //         if (av_read_frame(s, &pkt) < 0){
1051     //             av_log(s, AV_LOG_INFO, "seek failed\n");
1052     //             return -1;
1053     //         }
1054     //         asf_st = s->streams[stream_index]->priv_data;
1055     //         pos += st->parser->frame_offset;
1056     //
1057     //         if (pkt.size > b) {
1058     //             b = pkt.size;
1059     //             key_pos = pos;
1060     //         }
1061     //
1062     //         av_free_packet(&pkt);
1063     //     }
1064
1065         /* do the seek */
1066         av_log(NULL, AV_LOG_DEBUG, "SEEKTO: %"PRId64"\n", pos);
1067         url_fseek(&s->pb, pos, SEEK_SET);
1068     }
1069     asf_reset_header(s);
1070     return 0;
1071 }
1072
1073 AVInputFormat asf_demuxer = {
1074     "asf",
1075     "asf format",
1076     sizeof(ASFContext),
1077     asf_probe,
1078     asf_read_header,
1079     asf_read_packet,
1080     asf_read_close,
1081     asf_read_seek,
1082     asf_read_pts,
1083 };