-
Notifications
You must be signed in to change notification settings - Fork 114
/
ADM_tsPatPmt.cpp
443 lines (410 loc) · 15 KB
/
ADM_tsPatPmt.cpp
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
/** *************************************************************************
\file ADM_tsPatPmt.cpp
\brief Analyze pat & pmt
copyright : (C) 2007 by mean
email : fixounet@free.fr
***************************************************************************/
/***************************************************************************
* *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
* the Free Software Foundation; either version 2 of the License, or *
* (at your option) any later version. *
* *
***************************************************************************/
#include "ADM_default.h"
#include "ADM_ts.h"
#include "ADM_demuxerInternal.h"
#include "ADM_tsPatPmt.h"
typedef vector <ADM_TS_TRACK> listOfTsTracks;
/**
\fn scanPmt
*/
static bool TS_scanPmt(tsPacket *t,uint32_t pid,listOfTsTracks *list);
static bool decodeProgrameDescriptor(uint8_t *r, uint32_t maxlen,std::string &language);
static bool decodeRegistration(int size,uint8_t *data);
static ADM_TS_TRACK_TYPE EsType(uint32_t type,const char **str);
/**
\class TrackTypeDescriptor
*/
class TrackTypeDescriptor
{
public:
int type;
ADM_TS_TRACK_TYPE trackType;
const char *desc;
static TrackTypeDescriptor *find(int t);
};
TrackTypeDescriptor TrackTypes[]=
{
{0x002,ADM_TS_MPEG2, "Mpeg2 Video"},
{0x003,ADM_TS_MPEG_AUDIO,"Mpeg1 Audio"},
{0x004,ADM_TS_MPEG_AUDIO,"Mpeg2 Audio"},
{0x005,ADM_TS_UNKNOWN, "Registration"},
{0x01b,ADM_TS_H264, "H264 Video"},
{0x081,ADM_TS_AC3, "AC3 Audio"},
{0x0ea,ADM_TS_VC1, "VC1 Video"},
{0x006,ADM_TS_UNKNOWN, "Private Stream"},
{0xfff,ADM_TS_UNKNOWN, "Unknown"} // Last one must be "unknown!"
};
/**
\fn find
*/
TrackTypeDescriptor *TrackTypeDescriptor::find(int t)
{
int size=sizeof(TrackTypes)/sizeof(TrackTypeDescriptor);
for(int i=0;i<size;i++)
{
TrackTypeDescriptor *tp=TrackTypes+i;
if(tp->type==t) return tp;
}
return TrackTypes+size-1;
}
/**
\fn scanForPrograms
\brief Lookup PAT & PMT to get tracks
*/
bool TS_scanForPrograms(const char *file,uint32_t *nbTracks, ADM_TS_TRACK **outTracks)
{
uint32_t len;
TS_PSIpacketInfo psi;
listOfTsTracks list;
vector <uint32_t>listOfPmt;
ADM_TS_TRACK *tracks=NULL;
*outTracks=NULL;
*nbTracks=0;
uint32_t nb=0;
tsPacket *t=new tsPacket();
t->open(file,FP_PROBE);
// 1 search the pat...
if(t->getNextPSI(0,&psi)==true)
{
uint8_t *r=psi.payload;
len=psi.payloadSize;
while(len>=4)
{
uint32_t prg=((0x1F&r[0])<<8)+r[1];
uint32_t pid=((0x1F&r[2])<<8)+r[3];
r+=4;
len-=4;
printf("[TsDemuxer] Pat : Prg:%d Pid: 0x%04x\n",prg,pid);
if(prg) // if prg==0, it is network Pid, dont need it
listOfPmt.push_back(pid);
}
int size=listOfPmt.size();
if(size)
{
for(int i=0;i<size;i++) // First PMT is PCR lock ?
{
printf("<<< PMT : %d/%d>>>\n",i,size);
uint32_t pid=listOfPmt[i];
t->setPos(0); // Make sure we can have the very first one
TS_scanPmt(t,pid,&list);
}
}
}
// List now contains a list of elementary tracks
// TODO: Look deeper to see if there is actual content
// Some channels advertsise languages that they may have
// but dont actually exists in the file
// Allocate output files, max size=list.size
printf("[TS Demuxer] Found %u interesting tracks\n",(unsigned int)list.size());
// Search the video track...
bool result=false;
int videoIndex=-1;
for(int i=0;i<list.size();i++)
{
ADM_TS_TRACK_TYPE type=list[i].trackType;
if(type==ADM_TS_MPEG2 || type==ADM_TS_H264 || type==ADM_TS_VC1)
{
videoIndex=i;
break;
}
}
if(videoIndex==-1)
{
printf("[Ts Demuxer] Cannot find a video track\n");
goto _failTs;
}
{
//
// After here we cannot fail (normally...)
tracks=new ADM_TS_TRACK[list.size()];
*outTracks=tracks;
// Copy video track
tracks[0]=list[videoIndex];
// and remove it from the list
list.erase(list.begin()+videoIndex);
nb++;
// Also add audio tracks we know of
for(int i=0;i<list.size();i++)
{
ADM_TS_TRACK_TYPE type=list[i].trackType;
if(type==ADM_TS_MPEG_AUDIO || type==ADM_TS_AC3 || type==ADM_TS_AAC_ADTS ||type==ADM_TS_AAC_LATM
|| type==ADM_TS_EAC3)
{
TSpacketInfo pkt;
t->setPos(0);
if(true==t->getNextPacket_NoHeader(list[i].trackPid,&pkt,false))
tracks[nb++]=list[i];
else
printf("[TS Demuxer] Track %i pid 0x%x does not seem to be there\n",i,list[i].trackPid);
}
}
*nbTracks=nb;
result=true;
}
_failTs:
delete t;
// Delete the list
if(list.size())
list.erase(list.begin(),list.end()-1);
if(result==true)
{
printf("[T Demuxer] Kept %d tracks\n",*nbTracks);
}
printf("[TS Demuxer] Probed...\n");
return result;
}
/**
\fn TS_scanPmt
\brief Lookup one PMT and returns content
*/
bool TS_scanPmt(tsPacket *t,uint32_t pid,listOfTsTracks *list)
{
ADM_TS_TRACK trk;
trk.language=ADM_UNKNOWN_LANGUAGE;
uint32_t len;
TS_PSIpacketInfo psi;
uint8_t *r=psi.payload;
trk.trackType=ADM_TS_UNKNOWN;
trk.trackPid=pid;
printf("[TsDemuxer] Looking for PMT : 0x%x\n",pid);
if(t->getNextPSI(pid,&psi)==true)
{
len=psi.payloadSize;
// We should be protected by CRC here
int packLen=len;
printf("[TsDemuxer] PCR 0x%x, len=%d\n",(r[0]<<8)+r[1],packLen);
r+=2;
int programInfoLength=(r[0]<<8)+r[1];
programInfoLength&=0x3ff;
r+=2;
packLen-=4;
// Program Descriptor
printf("[PMT]--Decoding Program info--\n");
if(programInfoLength && programInfoLength<=packLen)
{
decodeProgrameDescriptor(r, programInfoLength,trk.language);
packLen-=programInfoLength;
r+=programInfoLength;
}
printf("[PMT] Left : %d bytes\n",packLen);
printf("[PMT]--Decoding ES Descriptor--\n");
// Es Type Descriptor
while(packLen>4)
{
int type=r[0];
int pid=(r[1]<<8)+r[2];
int size=(r[3]<<8)+r[4];
size&=0xfff;
pid&=0x1fff;
uint8_t *base=r+5;
r+=size+5;
packLen-=5+size;
printf("[PMT] Type=0x%x pid=%x size=%d\n",type,pid,size);
const char *str;
//
// extract tags to get additional infos/properties
//
uint8_t *head=base;
uint8_t *tail=r;
while(head<tail)
{
uint8_t tag=head[0];
uint8_t tag_len=head[1];
printf("[PMT] Tag 0x%x , len %d, ",tag,tag_len);
for(int i=0;i<tag_len;i++) printf(" %02x",head[2+i]);
printf("\n");
switch(tag)
{
case 0xa: // dvb language
{
if(tag_len<2) break; // too short
char lan[16];
for(int i=0;i<tag_len;i++)
{
lan[i]=head[2+i];
}
lan[tag_len]=0;
trk.language=std::string(lan);
break;
}
case 0x7A: if(type==6) type=0x84;break;
case 0x6A: if(type==6) type=0x81;break; // AC3
default:break;
}
head+=2+tag_len;
}
if(type==0xea)
{
}
ADM_TS_TRACK_TYPE trackType=EsType(type,&str);;
if(trackType!=ADM_TS_UNKNOWN)
{
ADM_TS_TRACK trk2;
trk2.trackPid=pid;
trk2.trackType=trackType;
trk2.language=trk.language;
printf("[PMT] Adding pid 0x%x (%d) , type %s, language=%s\n",pid,pid,str,trk2.language.c_str());
list->push_back(trk2);
}else
printf("[PMT] -> %s\n",str);
}
printf("[PMT] Left :%d bytes\n",packLen);
if(trk.trackType!=ADM_TS_UNKNOWN) list->push_back(trk);
return true;
}
return false;
}
/**
\fn EsType
\brief returns type and string attached to a ES type
*/
ADM_TS_TRACK_TYPE EsType(uint32_t type,const char **str)
{
*str="????";
switch(type)
{
case 0x01:case 2: *str= "Mpeg Video";return ADM_TS_MPEG2;break;
case 0x03:case 4: *str= "Mpeg Audio";return ADM_TS_MPEG_AUDIO;break;
case 0xF: *str= "Mpeg AAC ADTS";return ADM_TS_AAC_ADTS;break;
case 0x11: *str= "Mpeg AAC LATM";return ADM_TS_AAC_LATM;break;
case 0x1B: *str= "H264 Video";return ADM_TS_H264;break;
case 0x81: *str= "AC3 (Not sure)";return ADM_TS_AC3;break;
//case 0x82: *str= "DTS (Not sure)";return ADM_TS_DTS;break;
case 0x83: *str= "TrueHD AC3 (BluRay)";return ADM_TS_AC3;break;
case 0x84: *str= "E-AC3 (Not sure)";return ADM_TS_EAC3;break;
case 0x87: *str= "E-AC3 (Not sure)";return ADM_TS_EAC3;break;
case 0xea: *str= "VC1 (Not sure)";return ADM_TS_VC1;break;
case 0x90: *str= "Presentation graphics (BluRay)";return ADM_TS_UNKNOWN;break;
// case 0x10: *streamType=ADM_STREAM_MPEG4;return "MP4 Video";
default : break;
}
return ADM_TS_UNKNOWN;
}
/**
\fn decodeProgrameDescriptor
\brief decodeProgramDescriptor
http://www.coolstf.com/tsreader/descriptors.html
*/
bool decodeProgrameDescriptor(uint8_t *r, uint32_t maxlen,std::string &language)
{
printf("[PMT] Program Info Len: %d\n",maxlen);
int packLen=maxlen;
packLen-=(2+4);
while(packLen>4)
{
int streamType,streamPid,esInfoLength;
streamType=r[0];
printf("[PMT] StreamType=%d\n",streamType);
if(streamType==5) // descriptor
{
int descriptorLength=r[1];
if(descriptorLength+1>packLen)
{
ADM_warning("[PMT Registration length bigger than section\n");
return true;
}
printf("\t[PMT] Registration FCC %c%c%c%c \n",r[2],r[3],r[4],r[5]);
uint8_t *tail=r+2+descriptorLength;
packLen-=1+descriptorLength;
decodeRegistration(descriptorLength,r);
r=tail;
continue;
}
streamPid=(r[1]<<8)+r[2]&0x1fff;
esInfoLength=((r[3]<<8)+r[4])&0xfff;
r+=5;
packLen-=5;
packLen-=esInfoLength;
TrackTypeDescriptor *td=TrackTypeDescriptor::find(streamType);
printf("\t[PMT] StreamType: 0x%x,<<%s>>\n",streamType,td->desc);
printf("\t[PMT] Pid: 0x%x\n",streamPid);
printf("\t[PMT] Es Info Length: %d (0x%x)\n",esInfoLength,esInfoLength);
if(packLen<1)
{
ADM_warning("[PMT ES Info length bigger than section\n");
return true;
}
//trk.trackType=td->trackType;
//trk.trackPid=streamPid;
uint8_t *p=r,*pend=r+esInfoLength;
r+=esInfoLength;
while(p<pend)
{
uint32_t tag,taglen;
tag=p[0];
taglen=p[1];
printf("\t[PMT] Tag :%x len:%d =",tag,taglen);
switch(tag) //http://www.coolstf.com/tsreader/descriptors.html
{
case 0x05: printf("Registration Descriptor :%c%c%c%c",p[2],p[3],p[4],p[5]);break;
case 0x0a:
{
printf("Language descriptor :%c%c%c",p[2],p[3],p[4]);
char lang[4]={(char)p[2],(char)p[3],(char)p[4],0};
language=std::string(lang);
break;
}
case 0x11: printf("STD\n");break;
case 0x1e: printf("SL descriptor (H264 AAC ?)");break;
case 0x45: printf("VBI data\n");break;
case 0x52: printf("Stream identifier");break;
case 0x56: printf("Teletext");break;
case 0x59: printf("DVB subtitles");break;
case 0x7b: printf("DTS Descriptor");break;
case 0x7a: printf("EAC3 Descriptor");break;
case 0x6a: printf("AC3 Descriptor");break;
default : printf("unknown");break;
}
printf("\n");
p+=2+taglen;
}
//
}
return true;
}
/**
\fn decodeRegistration
\brief Decode registration descriptor subtag as used for VC1
*/
bool decodeRegistration(int size,uint8_t *data)
{
uint8_t *end=data+size;
while(data<end)
{
int tag=data[0];data++;
printf("[PMT] Registration, found tag %d\n",tag);
switch(tag)
{
case 0: break; // sub desc
case 0xff: break;
case 1: // profile & level desc
printf("[PMT] Profile/level :%d",*data++);
break;
case 2: // Alignment
printf("[PMT] Alignement :%d",*data++);
break;
case 3: // Buffer size
printf("[PMT] Buffer size\n");
data+=3;
break;
default:
printf("Unknown registration tag :%d\n",tag);
return true;
}
}
return true;
}
//EOF