simplify
[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 #include "asfcrypt.h"
27
28 extern void ff_mms_set_stream_selection(URLContext *h, AVFormatContext *format);
29
30 #undef NDEBUG
31 #include <assert.h>
32
33 #define FRAME_HEADER_SIZE 17
34 // Fix Me! FRAME_HEADER_SIZE may be different.
35
36 static const GUID index_guid = {
37     0x90, 0x08, 0x00, 0x33, 0xb1, 0xe5, 0xcf, 0x11, 0x89, 0xf4, 0x00, 0xa0, 0xc9, 0x03, 0x49, 0xcb
38 };
39
40 static const GUID stream_bitrate_guid = { /* (http://get.to/sdp) */
41     0xce, 0x75, 0xf8, 0x7b, 0x8d, 0x46, 0xd1, 0x11, 0x8d, 0x82, 0x00, 0x60, 0x97, 0xc9, 0xa2, 0xb2
42 };
43 /**********************************/
44 /* decoding */
45
46 //#define DEBUG
47
48 #ifdef DEBUG
49 #define PRINT_IF_GUID(g,cmp) \
50 if (!memcmp(g, &cmp, sizeof(GUID))) \
51     printf("(GUID: %s) ", #cmp)
52
53 static void print_guid(const GUID *g)
54 {
55     int i;
56     PRINT_IF_GUID(g, asf_header);
57     else PRINT_IF_GUID(g, file_header);
58     else PRINT_IF_GUID(g, stream_header);
59     else PRINT_IF_GUID(g, audio_stream);
60     else PRINT_IF_GUID(g, audio_conceal_none);
61     else PRINT_IF_GUID(g, video_stream);
62     else PRINT_IF_GUID(g, video_conceal_none);
63     else PRINT_IF_GUID(g, command_stream);
64     else PRINT_IF_GUID(g, comment_header);
65     else PRINT_IF_GUID(g, codec_comment_header);
66     else PRINT_IF_GUID(g, codec_comment1_header);
67     else PRINT_IF_GUID(g, data_header);
68     else PRINT_IF_GUID(g, index_guid);
69     else PRINT_IF_GUID(g, head1_guid);
70     else PRINT_IF_GUID(g, head2_guid);
71     else PRINT_IF_GUID(g, my_guid);
72     else PRINT_IF_GUID(g, ext_stream_header);
73     else PRINT_IF_GUID(g, extended_content_header);
74     else PRINT_IF_GUID(g, ext_stream_embed_stream_header);
75     else PRINT_IF_GUID(g, ext_stream_audio_stream);
76     else PRINT_IF_GUID(g, metadata_header);
77     else PRINT_IF_GUID(g, stream_bitrate_guid);
78     else
79         printf("(GUID: unknown) ");
80     for(i=0;i<16;i++)
81         printf(" 0x%02x,", (*g)[i]);
82     printf("}\n");
83 }
84 #undef PRINT_IF_GUID
85 #endif
86
87 static void get_guid(ByteIOContext *s, GUID *g)
88 {
89     assert(sizeof(*g) == 16);
90     get_buffer(s, *g, sizeof(*g));
91 }
92
93 #if 0
94 static void get_str16(ByteIOContext *pb, char *buf, int buf_size)
95 {
96     int len, c;
97     char *q;
98
99     len = get_le16(pb);
100     q = buf;
101     while (len > 0) {
102         c = get_le16(pb);
103         if ((q - buf) < buf_size - 1)
104             *q++ = c;
105         len--;
106     }
107     *q = '\0';
108 }
109 #endif
110
111 static void get_str16_nolen(ByteIOContext *pb, int len, char *buf, int buf_size)
112 {
113     char* q = buf;
114     len /= 2;
115     while (len--) {
116         uint8_t tmp;
117         PUT_UTF8(get_le16(pb), tmp, if (q - buf < buf_size - 1) *q++ = tmp;)
118     }
119     *q = '\0';
120 }
121
122 static int asf_probe(AVProbeData *pd)
123 {
124     /* check file header */
125     if (!memcmp(pd->buf, &asf_header, sizeof(GUID)))
126         return AVPROBE_SCORE_MAX;
127     else
128         return 0;
129 }
130
131 static int get_value(ByteIOContext *pb, int type){
132     switch(type){
133         case 2: return get_le32(pb);
134         case 3: return get_le32(pb);
135         case 4: return get_le64(pb);
136         case 5: return get_le16(pb);
137         default:return INT_MIN;
138     }
139 }
140
141 static int asf_read_header(AVFormatContext *s, AVFormatParameters *ap)
142 {
143     ASFContext *asf = s->priv_data;
144     GUID g;
145     ByteIOContext *pb = s->pb;
146     AVStream *st;
147     ASFStream *asf_st;
148     int size, i;
149     int64_t gsize;
150     AVRational dar[128];
151     uint32_t bitrate[128];
152
153     memset(dar, 0, sizeof(dar));
154     memset(bitrate, 0, sizeof(bitrate));
155
156     get_guid(pb, &g);
157     if (memcmp(&g, &asf_header, sizeof(GUID)))
158         goto fail;
159     get_le64(pb);
160     get_le32(pb);
161     get_byte(pb);
162     get_byte(pb);
163     memset(&asf->asfid2avid, -1, sizeof(asf->asfid2avid));
164     for(;;) {
165         get_guid(pb, &g);
166         gsize = get_le64(pb);
167 #ifdef DEBUG
168         printf("%08"PRIx64": ", url_ftell(pb) - 24);
169         print_guid(&g);
170         printf("  size=0x%"PRIx64"\n", gsize);
171 #endif
172         if (!memcmp(&g, &data_header, sizeof(GUID))) {
173             asf->data_object_offset = url_ftell(pb);
174             // if not streaming, gsize is not unlimited (how?), and there is enough space in the file..
175             if (!(asf->hdr.flags & 0x01) && gsize >= 100) {
176                 asf->data_object_size = gsize - 24;
177             } else {
178                 asf->data_object_size = (uint64_t)-1;
179             }
180             break;
181         }
182         if (gsize < 24)
183             goto fail;
184         if (!memcmp(&g, &file_header, sizeof(GUID))) {
185             get_guid(pb, &asf->hdr.guid);
186             asf->hdr.file_size          = get_le64(pb);
187             asf->hdr.create_time        = get_le64(pb);
188             asf->nb_packets             = get_le64(pb);
189             asf->hdr.send_time          = get_le64(pb);
190             asf->hdr.play_time          = get_le64(pb);
191             asf->hdr.preroll            = get_le32(pb);
192             asf->hdr.ignore             = get_le32(pb);
193             asf->hdr.flags              = get_le32(pb);
194             asf->hdr.min_pktsize        = get_le32(pb);
195             asf->hdr.max_pktsize        = get_le32(pb);
196             asf->hdr.max_bitrate        = get_le32(pb);
197             asf->packet_size = asf->hdr.max_pktsize;
198         } else if (!memcmp(&g, &stream_header, sizeof(GUID))) {
199             int type, type_specific_size, sizeX;
200             uint64_t total_size;
201             unsigned int tag1;
202             int64_t pos1, pos2, start_time;
203             int test_for_ext_stream_audio, is_dvr_ms_audio=0;
204
205             pos1 = url_ftell(pb);
206
207             st = av_new_stream(s, 0);
208             if (!st)
209                 goto fail;
210             av_set_pts_info(st, 32, 1, 1000); /* 32 bit pts in ms */
211             asf_st = av_mallocz(sizeof(ASFStream));
212             if (!asf_st)
213                 goto fail;
214             st->priv_data = asf_st;
215             start_time = asf->hdr.preroll;
216
217             if(!(asf->hdr.flags & 0x01)) { // if we aren't streaming...
218                 st->duration = asf->hdr.send_time /
219                     (10000000 / 1000) - start_time;
220             }
221             get_guid(pb, &g);
222
223             test_for_ext_stream_audio = 0;
224             if (!memcmp(&g, &audio_stream, sizeof(GUID))) {
225                 type = CODEC_TYPE_AUDIO;
226             } else if (!memcmp(&g, &video_stream, sizeof(GUID))) {
227                 type = CODEC_TYPE_VIDEO;
228             } else if (!memcmp(&g, &command_stream, sizeof(GUID))) {
229                 type = CODEC_TYPE_UNKNOWN;
230             } else if (!memcmp(&g, &ext_stream_embed_stream_header, sizeof(GUID))) {
231                 test_for_ext_stream_audio = 1;
232                 type = CODEC_TYPE_UNKNOWN;
233             } else {
234                 goto fail;
235             }
236             get_guid(pb, &g);
237             total_size = get_le64(pb);
238             type_specific_size = get_le32(pb);
239             get_le32(pb);
240             st->id = get_le16(pb) & 0x7f; /* stream id */
241             // mapping of asf ID to AV stream ID;
242             asf->asfid2avid[st->id] = s->nb_streams - 1;
243
244             get_le32(pb);
245
246             if (test_for_ext_stream_audio) {
247                 get_guid(pb, &g);
248                 if (!memcmp(&g, &ext_stream_audio_stream, sizeof(GUID))) {
249                     type = CODEC_TYPE_AUDIO;
250                     is_dvr_ms_audio=1;
251                     get_guid(pb, &g);
252                     get_le32(pb);
253                     get_le32(pb);
254                     get_le32(pb);
255                     get_guid(pb, &g);
256                     get_le32(pb);
257                 }
258             }
259
260             st->codec->codec_type = type;
261             if (type == CODEC_TYPE_AUDIO) {
262                 get_wav_header(pb, st->codec, type_specific_size);
263                 if (is_dvr_ms_audio) {
264                     // codec_id and codec_tag are unreliable in dvr_ms
265                     // files. Set them later by probing stream.
266                     st->codec->codec_id = CODEC_ID_NONE;
267                     st->codec->codec_tag = 0;
268                 }
269                 st->need_parsing = AVSTREAM_PARSE_FULL;
270                 /* We have to init the frame size at some point .... */
271                 pos2 = url_ftell(pb);
272                 if (gsize >= (pos2 + 8 - pos1 + 24)) {
273                     asf_st->ds_span = get_byte(pb);
274                     asf_st->ds_packet_size = get_le16(pb);
275                     asf_st->ds_chunk_size = get_le16(pb);
276                     get_le16(pb); //ds_data_size
277                     get_byte(pb); //ds_silence_data
278                 }
279                 //printf("Descrambling: ps:%d cs:%d ds:%d s:%d  sd:%d\n",
280                 //       asf_st->ds_packet_size, asf_st->ds_chunk_size,
281                 //       asf_st->ds_data_size, asf_st->ds_span, asf_st->ds_silence_data);
282                 if (asf_st->ds_span > 1) {
283                     if (!asf_st->ds_chunk_size
284                         || (asf_st->ds_packet_size/asf_st->ds_chunk_size <= 1)
285                         || asf_st->ds_packet_size % asf_st->ds_chunk_size)
286                         asf_st->ds_span = 0; // disable descrambling
287                 }
288                 switch (st->codec->codec_id) {
289                 case CODEC_ID_MP3:
290                     st->codec->frame_size = MPA_FRAME_SIZE;
291                     break;
292                 case CODEC_ID_PCM_S16LE:
293                 case CODEC_ID_PCM_S16BE:
294                 case CODEC_ID_PCM_U16LE:
295                 case CODEC_ID_PCM_U16BE:
296                 case CODEC_ID_PCM_S8:
297                 case CODEC_ID_PCM_U8:
298                 case CODEC_ID_PCM_ALAW:
299                 case CODEC_ID_PCM_MULAW:
300                     st->codec->frame_size = 1;
301                     break;
302                 default:
303                     /* This is probably wrong, but it prevents a crash later */
304                     st->codec->frame_size = 1;
305                     break;
306                 }
307             } else if (type == CODEC_TYPE_VIDEO) {
308                 get_le32(pb);
309                 get_le32(pb);
310                 get_byte(pb);
311                 size = get_le16(pb); /* size */
312                 sizeX= get_le32(pb); /* size */
313                 st->codec->width = get_le32(pb);
314                 st->codec->height = get_le32(pb);
315                 /* not available for asf */
316                 get_le16(pb); /* panes */
317                 st->codec->bits_per_sample = get_le16(pb); /* depth */
318                 tag1 = get_le32(pb);
319                 url_fskip(pb, 20);
320 //                av_log(NULL, AV_LOG_DEBUG, "size:%d tsize:%d sizeX:%d\n", size, total_size, sizeX);
321                 size= sizeX;
322                 if (size > 40) {
323                     st->codec->extradata_size = size - 40;
324                     st->codec->extradata = av_mallocz(st->codec->extradata_size + FF_INPUT_BUFFER_PADDING_SIZE);
325                     get_buffer(pb, st->codec->extradata, st->codec->extradata_size);
326                 }
327
328         /* Extract palette from extradata if bpp <= 8 */
329         /* This code assumes that extradata contains only palette */
330         /* This is true for all paletted codecs implemented in ffmpeg */
331         if (st->codec->extradata_size && (st->codec->bits_per_sample <= 8)) {
332             st->codec->palctrl = av_mallocz(sizeof(AVPaletteControl));
333 #ifdef WORDS_BIGENDIAN
334             for (i = 0; i < FFMIN(st->codec->extradata_size, AVPALETTE_SIZE)/4; i++)
335                 st->codec->palctrl->palette[i] = bswap_32(((uint32_t*)st->codec->extradata)[i]);
336 #else
337             memcpy(st->codec->palctrl->palette, st->codec->extradata,
338                    FFMIN(st->codec->extradata_size, AVPALETTE_SIZE));
339 #endif
340             st->codec->palctrl->palette_changed = 1;
341         }
342
343                 st->codec->codec_tag = tag1;
344                 st->codec->codec_id = codec_get_id(codec_bmp_tags, tag1);
345                 if(tag1 == MKTAG('D', 'V', 'R', ' '))
346                     st->need_parsing = AVSTREAM_PARSE_FULL;
347             }
348             pos2 = url_ftell(pb);
349             url_fskip(pb, gsize - (pos2 - pos1 + 24));
350         } else if (!memcmp(&g, &comment_header, sizeof(GUID))) {
351             int len1, len2, len3, len4, len5;
352
353             len1 = get_le16(pb);
354             len2 = get_le16(pb);
355             len3 = get_le16(pb);
356             len4 = get_le16(pb);
357             len5 = get_le16(pb);
358             get_str16_nolen(pb, len1, s->title    , sizeof(s->title));
359             get_str16_nolen(pb, len2, s->author   , sizeof(s->author));
360             get_str16_nolen(pb, len3, s->copyright, sizeof(s->copyright));
361             get_str16_nolen(pb, len4, s->comment  , sizeof(s->comment));
362             url_fskip(pb, len5);
363         } else if (!memcmp(&g, &stream_bitrate_guid, sizeof(GUID))) {
364             int stream_count = get_le16(pb);
365             int j;
366
367 //            av_log(NULL, AV_LOG_ERROR, "stream bitrate properties\n");
368 //            av_log(NULL, AV_LOG_ERROR, "streams %d\n", streams);
369             for(j = 0; j < stream_count; j++) {
370                 int flags, bitrate, stream_id;
371
372                 flags= get_le16(pb);
373                 bitrate= get_le32(pb);
374                 stream_id= (flags & 0x7f);
375 //                av_log(NULL, AV_LOG_ERROR, "flags: 0x%x stream id %d, bitrate %d\n", flags, stream_id, bitrate);
376                 asf->stream_bitrates[stream_id]= bitrate;
377             }
378        } else if (!memcmp(&g, &extended_content_header, sizeof(GUID))) {
379                 int desc_count, i;
380
381                 desc_count = get_le16(pb);
382                 for(i=0;i<desc_count;i++)
383                 {
384                         int name_len,value_type,value_len;
385                         uint64_t value_num = 0;
386                         char name[1024];
387
388                         name_len = get_le16(pb);
389                         get_str16_nolen(pb, name_len, name, sizeof(name));
390                         value_type = get_le16(pb);
391                         value_len = get_le16(pb);
392                         if (value_type <= 1) // unicode or byte
393                         {
394                                 if     (!strcmp(name,"WM/AlbumTitle")) get_str16_nolen(pb, value_len, s->album, sizeof(s->album));
395                                 else if(!strcmp(name,"WM/Genre"     )) get_str16_nolen(pb, value_len, s->genre, sizeof(s->genre));
396                                 else if(!strcmp(name,"WM/Year"      )) {
397                                     char year[8];
398                                     get_str16_nolen(pb, value_len, year, sizeof(year));
399                                     s->year = atoi(year);
400                                 }
401                                 else if(!strcmp(name,"WM/Track") && s->track == 0) {
402                                     char track[8];
403                                     get_str16_nolen(pb, value_len, track, sizeof(track));
404                                     s->track = strtol(track, NULL, 10) + 1;
405                                 }
406                                 else if(!strcmp(name,"WM/TrackNumber")) {
407                                     char track[8];
408                                     get_str16_nolen(pb, value_len, track, sizeof(track));
409                                     s->track = strtol(track, NULL, 10);
410                                 }
411                                 else url_fskip(pb, value_len);
412                         }
413                         else if (value_type <= 5) // boolean or DWORD or QWORD or WORD
414                         {
415                                 value_num= get_value(pb, value_type);
416                                 if (!strcmp(name,"WM/Track"      ) && s->track == 0) s->track = value_num + 1;
417                                 if (!strcmp(name,"WM/TrackNumber")) s->track = value_num;
418                         }
419                 }
420         } else if (!memcmp(&g, &metadata_header, sizeof(GUID))) {
421             int n, stream_num, name_len, value_len, value_type, value_num;
422             n = get_le16(pb);
423
424             for(i=0;i<n;i++) {
425                 char name[1024];
426
427                 get_le16(pb); //lang_list_index
428                 stream_num= get_le16(pb);
429                 name_len=   get_le16(pb);
430                 value_type= get_le16(pb);
431                 value_len=  get_le32(pb);
432
433                 get_str16_nolen(pb, name_len, name, sizeof(name));
434 //av_log(NULL, AV_LOG_ERROR, "%d %d %d %d %d <%s>\n", i, stream_num, name_len, value_type, value_len, name);
435                 value_num= get_le16(pb);//we should use get_value() here but it does not work 2 is le16 here but le32 elsewhere
436                 url_fskip(pb, value_len - 2);
437
438                 if(stream_num<128){
439                     if     (!strcmp(name, "AspectRatioX")) dar[stream_num].num= value_num;
440                     else if(!strcmp(name, "AspectRatioY")) dar[stream_num].den= value_num;
441                 }
442             }
443         } else if (!memcmp(&g, &ext_stream_header, sizeof(GUID))) {
444             int ext_len, payload_ext_ct, stream_ct;
445             uint32_t ext_d, leak_rate, stream_num;
446             int64_t pos_ex_st;
447             pos_ex_st = url_ftell(pb);
448
449             get_le64(pb); // starttime
450             get_le64(pb); // endtime
451             leak_rate = get_le32(pb); // leak-datarate
452             get_le32(pb); // bucket-datasize
453             get_le32(pb); // init-bucket-fullness
454             get_le32(pb); // alt-leak-datarate
455             get_le32(pb); // alt-bucket-datasize
456             get_le32(pb); // alt-init-bucket-fullness
457             get_le32(pb); // max-object-size
458             get_le32(pb); // flags (reliable,seekable,no_cleanpoints?,resend-live-cleanpoints, rest of bits reserved)
459             stream_num = get_le16(pb); // stream-num
460             get_le16(pb); // stream-language-id-index
461             get_le64(pb); // avg frametime in 100ns units
462             stream_ct = get_le16(pb); //stream-name-count
463             payload_ext_ct = get_le16(pb); //payload-extension-system-count
464
465             if (stream_num < 128)
466                 bitrate[stream_num] = leak_rate;
467
468             for (i=0; i<stream_ct; i++){
469                 get_le16(pb);
470                 ext_len = get_le16(pb);
471                 url_fseek(pb, ext_len, SEEK_CUR);
472             }
473
474             for (i=0; i<payload_ext_ct; i++){
475                 get_guid(pb, &g);
476                 ext_d=get_le16(pb);
477                 ext_len=get_le32(pb);
478                 url_fseek(pb, ext_len, SEEK_CUR);
479             }
480
481             // there could be a optional stream properties object to follow
482             // if so the next iteration will pick it up
483         } else if (!memcmp(&g, &head1_guid, sizeof(GUID))) {
484             int v1, v2;
485             get_guid(pb, &g);
486             v1 = get_le32(pb);
487             v2 = get_le16(pb);
488 #if 0
489         } else if (!memcmp(&g, &codec_comment_header, sizeof(GUID))) {
490             int len, v1, n, num;
491             char str[256], *q;
492             char tag[16];
493
494             get_guid(pb, &g);
495             print_guid(&g);
496
497             n = get_le32(pb);
498             for(i=0;i<n;i++) {
499                 num = get_le16(pb); /* stream number */
500                 get_str16(pb, str, sizeof(str));
501                 get_str16(pb, str, sizeof(str));
502                 len = get_le16(pb);
503                 q = tag;
504                 while (len > 0) {
505                     v1 = get_byte(pb);
506                     if ((q - tag) < sizeof(tag) - 1)
507                         *q++ = v1;
508                     len--;
509                 }
510                 *q = '\0';
511             }
512 #endif
513         } else if (url_feof(pb)) {
514             goto fail;
515         } else {
516             url_fseek(pb, gsize - 24, SEEK_CUR);
517         }
518     }
519     get_guid(pb, &g);
520     get_le64(pb);
521     get_byte(pb);
522     get_byte(pb);
523     if (url_feof(pb))
524         goto fail;
525     asf->data_offset = url_ftell(pb);
526     asf->packet_size_left = 0;
527
528
529     for(i=0; i<128; i++){
530         int stream_num= asf->asfid2avid[i];
531         if(stream_num>=0){
532             AVCodecContext *codec= s->streams[stream_num]->codec;
533             if (!codec->bit_rate)
534                 codec->bit_rate = bitrate[i];
535             if (dar[i].num > 0 && dar[i].den > 0)
536                 av_reduce(&codec->sample_aspect_ratio.num,
537                           &codec->sample_aspect_ratio.den,
538                           dar[i].num, dar[i].den, INT_MAX);
539 //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);
540         }
541     }
542
543     return 0;
544
545  fail:
546      for(i=0;i<s->nb_streams;i++) {
547         AVStream *st = s->streams[i];
548         if (st) {
549             av_free(st->priv_data);
550             av_free(st->codec->extradata);
551         }
552         av_free(st);
553     }
554     return -1;
555 }
556
557 #define DO_2BITS(bits, var, defval) \
558     switch (bits & 3) \
559     { \
560     case 3: var = get_le32(pb); rsize += 4; break; \
561     case 2: var = get_le16(pb); rsize += 2; break; \
562     case 1: var = get_byte(pb); rsize++; break; \
563     default: var = defval; break; \
564     }
565
566 /**
567  *
568  * @return <0 in case of an error
569  */
570 static int asf_get_packet(AVFormatContext *s)
571 {
572     ASFContext *asf = s->priv_data;
573     ByteIOContext *pb = s->pb;
574     uint32_t packet_length, padsize;
575     int rsize = 8;
576     int c, d, e, off;
577
578     off= (url_ftell(s->pb) - s->data_offset) % asf->packet_size + 3;
579
580     c=d=e=-1;
581     while(off-- > 0){
582         c=d; d=e;
583         e= get_byte(pb);
584         if(c == 0x82 && !d && !e)
585             break;
586     }
587
588     if (c != 0x82) {
589         if (!url_feof(pb))
590             av_log(s, AV_LOG_ERROR, "ff asf bad header %x  at:%"PRId64"\n", c, url_ftell(pb));
591     }
592     if ((c & 0x8f) == 0x82) {
593         if (d || e) {
594             if (!url_feof(pb))
595                 av_log(s, AV_LOG_ERROR, "ff asf bad non zero\n");
596             return -1;
597         }
598         c= get_byte(pb);
599         d= get_byte(pb);
600         rsize+=3;
601     }else{
602         url_fseek(pb, -1, SEEK_CUR); //FIXME
603     }
604
605     asf->packet_flags    = c;
606     asf->packet_property = d;
607
608     DO_2BITS(asf->packet_flags >> 5, packet_length, asf->packet_size);
609     DO_2BITS(asf->packet_flags >> 1, padsize, 0); // sequence ignored
610     DO_2BITS(asf->packet_flags >> 3, padsize, 0); // padding length
611
612     //the following checks prevent overflows and infinite loops
613     if(packet_length >= (1U<<29)){
614         av_log(s, AV_LOG_ERROR, "invalid packet_length %d at:%"PRId64"\n", packet_length, url_ftell(pb));
615         return -1;
616     }
617     if(padsize >= packet_length){
618         av_log(s, AV_LOG_ERROR, "invalid padsize %d at:%"PRId64"\n", padsize, url_ftell(pb));
619         return -1;
620     }
621
622     asf->packet_timestamp = get_le32(pb);
623     get_le16(pb); /* duration */
624     // rsize has at least 11 bytes which have to be present
625
626     if (asf->packet_flags & 0x01) {
627         asf->packet_segsizetype = get_byte(pb); rsize++;
628         asf->packet_segments = asf->packet_segsizetype & 0x3f;
629     } else {
630         asf->packet_segments = 1;
631         asf->packet_segsizetype = 0x80;
632     }
633     asf->packet_size_left = packet_length - padsize - rsize;
634     if (packet_length < asf->hdr.min_pktsize)
635         padsize += asf->hdr.min_pktsize - packet_length;
636     asf->packet_padsize = padsize;
637 #ifdef DEBUG
638     printf("packet: size=%d padsize=%d  left=%d\n", asf->packet_size, asf->packet_padsize, asf->packet_size_left);
639 #endif
640     return 0;
641 }
642
643 /**
644  *
645  * @return <0 if error
646  */
647 static int asf_read_frame_header(AVFormatContext *s){
648     ASFContext *asf = s->priv_data;
649     ByteIOContext *pb = s->pb;
650     int rsize = 1;
651     int num = get_byte(pb);
652     int64_t ts0, ts1;
653
654     asf->packet_segments--;
655     asf->packet_key_frame = num >> 7;
656     asf->stream_index = asf->asfid2avid[num & 0x7f];
657     // sequence should be ignored!
658     DO_2BITS(asf->packet_property >> 4, asf->packet_seq, 0);
659     DO_2BITS(asf->packet_property >> 2, asf->packet_frag_offset, 0);
660     DO_2BITS(asf->packet_property, asf->packet_replic_size, 0);
661 //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);
662     if (asf->packet_replic_size >= 8) {
663         asf->packet_obj_size = get_le32(pb);
664         if(asf->packet_obj_size >= (1<<24) || asf->packet_obj_size <= 0){
665             av_log(s, AV_LOG_ERROR, "packet_obj_size invalid\n");
666             return -1;
667         }
668         asf->packet_frag_timestamp = get_le32(pb); // timestamp
669         if(asf->packet_replic_size >= 8+38+4){
670 //            for(i=0; i<asf->packet_replic_size-8; i++)
671 //                av_log(s, AV_LOG_DEBUG, "%02X ",get_byte(pb));
672 //            av_log(s, AV_LOG_DEBUG, "\n");
673             url_fskip(pb, 10);
674             ts0= get_le64(pb);
675             ts1= get_le64(pb);
676             url_fskip(pb, 12);
677             get_le32(pb);
678             url_fskip(pb, asf->packet_replic_size - 8 - 38 - 4);
679             if(ts0!= -1) asf->packet_frag_timestamp= ts0/10000;
680             else         asf->packet_frag_timestamp= AV_NOPTS_VALUE;
681         }else
682             url_fskip(pb, asf->packet_replic_size - 8);
683         rsize += asf->packet_replic_size; // FIXME - check validity
684     } else if (asf->packet_replic_size==1){
685         // multipacket - frag_offset is beginning timestamp
686         asf->packet_time_start = asf->packet_frag_offset;
687         asf->packet_frag_offset = 0;
688         asf->packet_frag_timestamp = asf->packet_timestamp;
689
690         asf->packet_time_delta = get_byte(pb);
691         rsize++;
692     }else if(asf->packet_replic_size!=0){
693         av_log(s, AV_LOG_ERROR, "unexpected packet_replic_size of %d\n", asf->packet_replic_size);
694         return -1;
695     }
696     if (asf->packet_flags & 0x01) {
697         DO_2BITS(asf->packet_segsizetype >> 6, asf->packet_frag_size, 0); // 0 is illegal
698         if(asf->packet_frag_size > asf->packet_size_left - rsize){
699             av_log(s, AV_LOG_ERROR, "packet_frag_size is invalid\n");
700             return -1;
701         }
702         //printf("Fragsize %d\n", asf->packet_frag_size);
703     } else {
704         asf->packet_frag_size = asf->packet_size_left - rsize;
705         //printf("Using rest  %d %d %d\n", asf->packet_frag_size, asf->packet_size_left, rsize);
706     }
707     if (asf->packet_replic_size == 1) {
708         asf->packet_multi_size = asf->packet_frag_size;
709         if (asf->packet_multi_size > asf->packet_size_left)
710             return -1;
711     }
712     asf->packet_size_left -= rsize;
713     //printf("___objsize____  %d   %d    rs:%d\n", asf->packet_obj_size, asf->packet_frag_offset, rsize);
714
715     return 0;
716 }
717
718 static int asf_read_packet(AVFormatContext *s, AVPacket *pkt)
719 {
720     ASFContext *asf = s->priv_data;
721     ASFStream *asf_st = 0;
722     ByteIOContext *pb = s->pb;
723     //static int pc = 0;
724     for (;;) {
725         if(url_feof(pb))
726             return AVERROR(EIO);
727         if (asf->packet_size_left < FRAME_HEADER_SIZE
728             || asf->packet_segments < 1) {
729             //asf->packet_size_left <= asf->packet_padsize) {
730             int ret = asf->packet_size_left + asf->packet_padsize;
731             //printf("PacketLeftSize:%d  Pad:%d Pos:%"PRId64"\n", asf->packet_size_left, asf->packet_padsize, url_ftell(pb));
732             assert(ret>=0);
733             /* fail safe */
734             url_fskip(pb, ret);
735
736             asf->packet_pos= url_ftell(s->pb);
737             if (asf->data_object_size != (uint64_t)-1 &&
738                 (asf->packet_pos - asf->data_object_offset >= asf->data_object_size))
739                 return AVERROR(EIO); /* Do not exceed the size of the data object */
740             ret = asf_get_packet(s);
741             //printf("READ ASF PACKET  %d   r:%d   c:%d\n", ret, asf->packet_size_left, pc++);
742             if (ret < 0)
743                 assert(asf->packet_size_left < FRAME_HEADER_SIZE || asf->packet_segments < 1);
744             asf->packet_time_start = 0;
745             continue;
746         }
747         if (asf->packet_time_start == 0) {
748             if(asf_read_frame_header(s) < 0){
749                 asf->packet_segments= 0;
750                 continue;
751             }
752             if (asf->stream_index < 0
753                 || s->streams[asf->stream_index]->discard >= AVDISCARD_ALL
754                 || (!asf->packet_key_frame && s->streams[asf->stream_index]->discard >= AVDISCARD_NONKEY)
755                 ) {
756                 asf->packet_time_start = 0;
757                 /* unhandled packet (should not happen) */
758                 url_fskip(pb, asf->packet_frag_size);
759                 asf->packet_size_left -= asf->packet_frag_size;
760                 if(asf->stream_index < 0)
761                     av_log(s, AV_LOG_ERROR, "ff asf skip %d (unknown stream)\n", asf->packet_frag_size);
762                 continue;
763             }
764             asf->asf_st = s->streams[asf->stream_index]->priv_data;
765         }
766         asf_st = asf->asf_st;
767
768         if (asf->packet_replic_size == 1) {
769             // frag_offset is here used as the beginning timestamp
770             asf->packet_frag_timestamp = asf->packet_time_start;
771             asf->packet_time_start += asf->packet_time_delta;
772             asf->packet_obj_size = asf->packet_frag_size = get_byte(pb);
773             asf->packet_size_left--;
774             asf->packet_multi_size--;
775             if (asf->packet_multi_size < asf->packet_obj_size)
776             {
777                 asf->packet_time_start = 0;
778                 url_fskip(pb, asf->packet_multi_size);
779                 asf->packet_size_left -= asf->packet_multi_size;
780                 continue;
781             }
782             asf->packet_multi_size -= asf->packet_obj_size;
783             //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);
784         }
785         if(   /*asf->packet_frag_size == asf->packet_obj_size*/
786               asf_st->frag_offset + asf->packet_frag_size <= asf_st->pkt.size
787            && asf_st->frag_offset + asf->packet_frag_size > asf->packet_obj_size){
788             av_log(s, AV_LOG_INFO, "ignoring invalid packet_obj_size (%d %d %d %d)\n",
789                 asf_st->frag_offset, asf->packet_frag_size,
790                 asf->packet_obj_size, asf_st->pkt.size);
791             asf->packet_obj_size= asf_st->pkt.size;
792         }
793
794         if (   asf_st->pkt.size != asf->packet_obj_size
795             || asf_st->frag_offset + asf->packet_frag_size > asf_st->pkt.size) { //FIXME is this condition sufficient?
796             if(asf_st->pkt.data){
797                 av_log(s, AV_LOG_INFO, "freeing incomplete packet size %d, new %d\n", asf_st->pkt.size, asf->packet_obj_size);
798                 asf_st->frag_offset = 0;
799                 av_free_packet(&asf_st->pkt);
800             }
801             /* new packet */
802             av_new_packet(&asf_st->pkt, asf->packet_obj_size);
803             asf_st->seq = asf->packet_seq;
804             asf_st->pkt.pts = asf->packet_frag_timestamp;
805             asf_st->pkt.stream_index = asf->stream_index;
806             asf_st->pkt.pos =
807             asf_st->packet_pos= asf->packet_pos;
808 //printf("new packet: stream:%d key:%d packet_key:%d audio:%d size:%d\n",
809 //asf->stream_index, asf->packet_key_frame, asf_st->pkt.flags & PKT_FLAG_KEY,
810 //s->streams[asf->stream_index]->codec->codec_type == CODEC_TYPE_AUDIO, asf->packet_obj_size);
811             if (s->streams[asf->stream_index]->codec->codec_type == CODEC_TYPE_AUDIO)
812                 asf->packet_key_frame = 1;
813             if (asf->packet_key_frame)
814                 asf_st->pkt.flags |= PKT_FLAG_KEY;
815         }
816
817         /* read data */
818         //printf("READ PACKET s:%d  os:%d  o:%d,%d  l:%d   DATA:%p\n",
819         //       asf->packet_size, asf_st->pkt.size, asf->packet_frag_offset,
820         //       asf_st->frag_offset, asf->packet_frag_size, asf_st->pkt.data);
821         asf->packet_size_left -= asf->packet_frag_size;
822         if (asf->packet_size_left < 0)
823             continue;
824
825         if(   asf->packet_frag_offset >= asf_st->pkt.size
826            || asf->packet_frag_size > asf_st->pkt.size - asf->packet_frag_offset){
827             av_log(s, AV_LOG_ERROR, "packet fragment position invalid %u,%u not in %u\n",
828                 asf->packet_frag_offset, asf->packet_frag_size, asf_st->pkt.size);
829             continue;
830         }
831
832         get_buffer(pb, asf_st->pkt.data + asf->packet_frag_offset,
833                    asf->packet_frag_size);
834         if (s->key && s->keylen == 20)
835             ff_asfcrypt_dec(s->key, asf_st->pkt.data + asf->packet_frag_offset,
836                             asf->packet_frag_size);
837         asf_st->frag_offset += asf->packet_frag_size;
838         /* test if whole packet is read */
839         if (asf_st->frag_offset == asf_st->pkt.size) {
840             //workaround for macroshit radio DVR-MS files
841             if(   s->streams[asf->stream_index]->codec->codec_id == CODEC_ID_MPEG2VIDEO
842                && asf_st->pkt.size > 100){
843                 int i;
844                 for(i=0; i<asf_st->pkt.size && !asf_st->pkt.data[i]; i++);
845                 if(i == asf_st->pkt.size){
846                     av_log(s, AV_LOG_DEBUG, "discarding ms fart\n");
847                     asf_st->frag_offset = 0;
848                     av_free_packet(&asf_st->pkt);
849                     continue;
850                 }
851             }
852
853             /* return packet */
854             if (asf_st->ds_span > 1) {
855               if(asf_st->pkt.size != asf_st->ds_packet_size * asf_st->ds_span){
856                     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);
857               }else{
858                 /* packet descrambling */
859                 uint8_t *newdata = av_malloc(asf_st->pkt.size);
860                 if (newdata) {
861                     int offset = 0;
862                     while (offset < asf_st->pkt.size) {
863                         int off = offset / asf_st->ds_chunk_size;
864                         int row = off / asf_st->ds_span;
865                         int col = off % asf_st->ds_span;
866                         int idx = row + col * asf_st->ds_packet_size / asf_st->ds_chunk_size;
867                         //printf("off:%d  row:%d  col:%d  idx:%d\n", off, row, col, idx);
868
869                         assert(offset + asf_st->ds_chunk_size <= asf_st->pkt.size);
870                         assert(idx+1 <= asf_st->pkt.size / asf_st->ds_chunk_size);
871                         memcpy(newdata + offset,
872                                asf_st->pkt.data + idx * asf_st->ds_chunk_size,
873                                asf_st->ds_chunk_size);
874                         offset += asf_st->ds_chunk_size;
875                     }
876                     av_free(asf_st->pkt.data);
877                     asf_st->pkt.data = newdata;
878                 }
879               }
880             }
881             asf_st->frag_offset = 0;
882             *pkt= asf_st->pkt;
883             //printf("packet %d %d\n", asf_st->pkt.size, asf->packet_frag_size);
884             asf_st->pkt.size = 0;
885             asf_st->pkt.data = 0;
886             break; // packet completed
887         }
888     }
889     return 0;
890 }
891
892 // Added to support seeking after packets have been read
893 // If information is not reset, read_packet fails due to
894 // leftover information from previous reads
895 static void asf_reset_header(AVFormatContext *s)
896 {
897     ASFContext *asf = s->priv_data;
898     ASFStream *asf_st;
899     int i;
900
901     asf->packet_nb_frames = 0;
902     asf->packet_size_left = 0;
903     asf->packet_segments = 0;
904     asf->packet_flags = 0;
905     asf->packet_property = 0;
906     asf->packet_timestamp = 0;
907     asf->packet_segsizetype = 0;
908     asf->packet_segments = 0;
909     asf->packet_seq = 0;
910     asf->packet_replic_size = 0;
911     asf->packet_key_frame = 0;
912     asf->packet_padsize = 0;
913     asf->packet_frag_offset = 0;
914     asf->packet_frag_size = 0;
915     asf->packet_frag_timestamp = 0;
916     asf->packet_multi_size = 0;
917     asf->packet_obj_size = 0;
918     asf->packet_time_delta = 0;
919     asf->packet_time_start = 0;
920
921     for(i=0; i<s->nb_streams; i++){
922         asf_st= s->streams[i]->priv_data;
923         av_free_packet(&asf_st->pkt);
924         asf_st->frag_offset=0;
925         asf_st->seq=0;
926     }
927     asf->asf_st= NULL;
928 }
929
930 static int asf_read_close(AVFormatContext *s)
931 {
932     int i;
933
934     asf_reset_header(s);
935     for(i=0;i<s->nb_streams;i++) {
936         AVStream *st = s->streams[i];
937         av_free(st->priv_data);
938         av_free(st->codec->palctrl);
939     }
940     return 0;
941 }
942
943 static int64_t asf_read_pts(AVFormatContext *s, int stream_index, int64_t *ppos, int64_t pos_limit)
944 {
945     ASFContext *asf = s->priv_data;
946     AVPacket pkt1, *pkt = &pkt1;
947     ASFStream *asf_st;
948     int64_t pts;
949     int64_t pos= *ppos;
950     int i;
951     int64_t start_pos[s->nb_streams];
952
953     for(i=0; i<s->nb_streams; i++){
954         start_pos[i]= pos;
955     }
956
957     pos= (pos+asf->packet_size-1-s->data_offset)/asf->packet_size*asf->packet_size+ s->data_offset;
958     *ppos= pos;
959     url_fseek(s->pb, pos, SEEK_SET);
960
961 //printf("asf_read_pts\n");
962     asf_reset_header(s);
963     for(;;){
964         if (av_read_frame(s, pkt) < 0){
965             av_log(s, AV_LOG_INFO, "asf_read_pts failed\n");
966             return AV_NOPTS_VALUE;
967         }
968
969         pts= pkt->pts;
970
971         av_free_packet(pkt);
972         if(pkt->flags&PKT_FLAG_KEY){
973             i= pkt->stream_index;
974
975             asf_st= s->streams[i]->priv_data;
976
977 //            assert((asf_st->packet_pos - s->data_offset) % asf->packet_size == 0);
978             pos= asf_st->packet_pos;
979
980             av_add_index_entry(s->streams[i], pos, pts, pkt->size, pos - start_pos[i] + 1, AVINDEX_KEYFRAME);
981             start_pos[i]= asf_st->packet_pos + 1;
982
983             if(pkt->stream_index == stream_index)
984                break;
985         }
986     }
987
988     *ppos= pos;
989 //printf("found keyframe at %"PRId64" stream %d stamp:%"PRId64"\n", *ppos, stream_index, pts);
990
991     return pts;
992 }
993
994 static void asf_build_simple_index(AVFormatContext *s, int stream_index)
995 {
996     GUID g;
997     ASFContext *asf = s->priv_data;
998     int64_t gsize, itime;
999     int64_t pos, current_pos, index_pts;
1000     int i;
1001     int pct,ict;
1002
1003     current_pos = url_ftell(s->pb);
1004
1005     url_fseek(s->pb, asf->data_object_offset + asf->data_object_size, SEEK_SET);
1006     get_guid(s->pb, &g);
1007     if (!memcmp(&g, &index_guid, sizeof(GUID))) {
1008         gsize = get_le64(s->pb);
1009         get_guid(s->pb, &g);
1010         itime=get_le64(s->pb);
1011         pct=get_le32(s->pb);
1012         ict=get_le32(s->pb);
1013         av_log(NULL, AV_LOG_DEBUG, "itime:0x%"PRIx64", pct:%d, ict:%d\n",itime,pct,ict);
1014
1015         for (i=0;i<ict;i++){
1016             int pktnum=get_le32(s->pb);
1017             int pktct =get_le16(s->pb);
1018             av_log(NULL, AV_LOG_DEBUG, "pktnum:%d, pktct:%d\n", pktnum, pktct);
1019
1020             pos=s->data_offset + asf->packet_size*(int64_t)pktnum;
1021             index_pts=av_rescale(itime, i, 10000);
1022
1023             av_add_index_entry(s->streams[stream_index], pos, index_pts, asf->packet_size, 0, AVINDEX_KEYFRAME);
1024         }
1025         asf->index_read= 1;
1026     }
1027     url_fseek(s->pb, current_pos, SEEK_SET);
1028 }
1029
1030 static int asf_read_seek(AVFormatContext *s, int stream_index, int64_t pts, int flags)
1031 {
1032     ASFContext *asf = s->priv_data;
1033     AVStream *st = s->streams[stream_index];
1034     int64_t pos;
1035     int index;
1036
1037     if (asf->packet_size <= 0)
1038         return -1;
1039
1040     /* Try using the protocol's read_seek if available */
1041     if(s->pb) {
1042         int ret = av_url_read_fseek(s->pb, stream_index, pts, flags);
1043         if(ret >= 0)
1044             asf_reset_header(s);
1045         if (ret != AVERROR(ENOSYS))
1046             return ret;
1047     }
1048
1049     if (!asf->index_read)
1050         asf_build_simple_index(s, stream_index);
1051
1052     if(!(asf->index_read && st->index_entries)){
1053         if(av_seek_frame_binary(s, stream_index, pts, flags)<0)
1054             return -1;
1055     }else{
1056         index= av_index_search_timestamp(st, pts, flags);
1057         if(index<0)
1058             return -1;
1059
1060         /* find the position */
1061         pos = st->index_entries[index].pos;
1062         pts = st->index_entries[index].timestamp;
1063
1064     // various attempts to find key frame have failed so far
1065     //    asf_reset_header(s);
1066     //    url_fseek(s->pb, pos, SEEK_SET);
1067     //    key_pos = pos;
1068     //     for(i=0;i<16;i++){
1069     //         pos = url_ftell(s->pb);
1070     //         if (av_read_frame(s, &pkt) < 0){
1071     //             av_log(s, AV_LOG_INFO, "seek failed\n");
1072     //             return -1;
1073     //         }
1074     //         asf_st = s->streams[stream_index]->priv_data;
1075     //         pos += st->parser->frame_offset;
1076     //
1077     //         if (pkt.size > b) {
1078     //             b = pkt.size;
1079     //             key_pos = pos;
1080     //         }
1081     //
1082     //         av_free_packet(&pkt);
1083     //     }
1084
1085         /* do the seek */
1086         av_log(NULL, AV_LOG_DEBUG, "SEEKTO: %"PRId64"\n", pos);
1087         url_fseek(s->pb, pos, SEEK_SET);
1088     }
1089     asf_reset_header(s);
1090     return 0;
1091 }
1092
1093 AVInputFormat asf_demuxer = {
1094     "asf",
1095     "asf format",
1096     sizeof(ASFContext),
1097     asf_probe,
1098     asf_read_header,
1099     asf_read_packet,
1100     asf_read_close,
1101     asf_read_seek,
1102     asf_read_pts,
1103 };