1 |
// PS.cpp : implementation file
|
2 |
//
|
3 |
//********************************************************************
|
4 |
//
|
5 |
|
6 |
#ifdef HAVE_CONFIG_H
|
7 |
# include "config.h"
|
8 |
#endif
|
9 |
|
10 |
#include <fcntl.h>
|
11 |
#include <errno.h>
|
12 |
|
13 |
#ifdef HAVE_STRING_H
|
14 |
# include <string.h>
|
15 |
#endif
|
16 |
|
17 |
#ifdef WIN32
|
18 |
# include <winsock2.h>
|
19 |
#endif
|
20 |
#ifdef HAVE_NETINET_IN_H
|
21 |
# include <netinet/in.h>
|
22 |
#endif
|
23 |
|
24 |
#include "TScan.h"
|
25 |
#include "Utility.h"
|
26 |
|
27 |
#ifndef O_BINARY
|
28 |
# define O_BINARY 0
|
29 |
#endif
|
30 |
|
31 |
#if defined(HAVE_STRCASECMP)
|
32 |
# define ICASE_STR_COMPARE(a, b) strcasecmp(a, b)
|
33 |
#elif defined(HAVE__STRICMP)
|
34 |
# define ICASE_STR_COMPARE(a, b) _stricmp(a, b)
|
35 |
#elif defined(HAVE_STRICMP)
|
36 |
# define ICASE_STR_COMPARE(a, b) stricmp(a, b)
|
37 |
#else
|
38 |
# error No known case-insensitive string compare function for this platform
|
39 |
#endif
|
40 |
|
41 |
CPs::CPs()
|
42 |
{
|
43 |
|
44 |
m_nFile = NULL;
|
45 |
buf = NULL;
|
46 |
buf_len = 0;
|
47 |
pos = 0;
|
48 |
m_dwFileLength = 0;
|
49 |
m_dwBufferBase = 0;
|
50 |
m_pParent = NULL;
|
51 |
|
52 |
}
|
53 |
|
54 |
CPs::~CPs()
|
55 |
{
|
56 |
|
57 |
CleanUp();
|
58 |
|
59 |
}
|
60 |
|
61 |
bool CPs::CleanUp(void)
|
62 |
{
|
63 |
|
64 |
if( m_nFile != NULL ) {
|
65 |
hclose( m_nFile );
|
66 |
m_nFile = NULL;
|
67 |
}
|
68 |
|
69 |
if( buf != NULL ) {
|
70 |
free( buf );
|
71 |
buf = NULL;
|
72 |
}
|
73 |
|
74 |
return true;
|
75 |
|
76 |
}
|
77 |
|
78 |
bool CPs::Initialize( std::string szInputFile )
|
79 |
{
|
80 |
|
81 |
CleanUp();
|
82 |
|
83 |
if( buf == NULL )
|
84 |
buf = (byte *)malloc(PS_BUFFER_LENGTH);
|
85 |
|
86 |
memset( buf, 0, PS_BUFFER_LENGTH);
|
87 |
|
88 |
buf_len=0;
|
89 |
pos=0;
|
90 |
|
91 |
if(szInputFile == "-")
|
92 |
m_nFile = hattach(stdin);
|
93 |
else
|
94 |
m_nFile = hopen( szInputFile.c_str(), "rb");
|
95 |
if( m_nFile == NULL ) {
|
96 |
TRACE("File could not be opened %0x\n", errno );
|
97 |
return false;
|
98 |
} else {
|
99 |
if (szInputFile != "-")
|
100 |
{
|
101 |
hseek(m_nFile, 0L, SEEK_END);
|
102 |
m_dwFileLength = htell( m_nFile );
|
103 |
hseek( m_nFile, 0, SEEK_SET );
|
104 |
|
105 |
std::string csExt = GetFileExtFromPath(szInputFile.c_str());
|
106 |
if( ICASE_STR_COMPARE(csExt.c_str(), ".tivo") != 0)
|
107 |
return false;
|
108 |
}
|
109 |
|
110 |
char fingerprint[5];
|
111 |
memset( fingerprint, 0, 5 );
|
112 |
hread( fingerprint, 4, m_nFile );
|
113 |
|
114 |
if( ICASE_STR_COMPARE( fingerprint, "tivo" ) )
|
115 |
{
|
116 |
/* rewind. This should be OK because happyfile is
|
117 |
* careful to buffer
|
118 |
*/
|
119 |
hseek(m_nFile, 0, SEEK_SET);
|
120 |
return false;
|
121 |
}
|
122 |
|
123 |
hseek( m_nFile, 0x0A, SEEK_SET );
|
124 |
boost::uint32_t offset = 0;
|
125 |
hread( &offset, 4, m_nFile );
|
126 |
m_dwBufferBase = ntohl(offset);
|
127 |
|
128 |
hseek( m_nFile, m_dwBufferBase, SEEK_SET ); // Skip xml notice and file fingerprint information
|
129 |
|
130 |
return true;
|
131 |
|
132 |
}
|
133 |
}
|
134 |
|
135 |
int CPs::PercentDone()
|
136 |
{
|
137 |
if( m_dwFileLength == 0 )
|
138 |
return 0;
|
139 |
else
|
140 |
return (int)(( 100 * (m_dwBufferBase + pos ))/m_dwFileLength);
|
141 |
}
|
142 |
|
143 |
void CPs::fill_buffer(size_t st)
|
144 |
{
|
145 |
buf_len = hread( buf+st, PS_BUFFER_LENGTH-st, m_nFile) + st;
|
146 |
m_dwBufferBase = htell( m_nFile ) - buf_len; // File location for start of buffer
|
147 |
pos=0;
|
148 |
}
|
149 |
|
150 |
bool CPs::check_buffer( size_t need )
|
151 |
{
|
152 |
size_t i;
|
153 |
#ifdef _DEBUG
|
154 |
byte *pj = &buf[pos]; // Gives me a convenient place for a break point...
|
155 |
#endif
|
156 |
|
157 |
if( (buf_len - pos) < need ) {
|
158 |
if( buf_len==PS_BUFFER_LENGTH ) {
|
159 |
for(i=pos;i<buf_len;i++)
|
160 |
buf[i-pos]=buf[i];
|
161 |
fill_buffer(buf_len-pos);
|
162 |
} else
|
163 |
return false;
|
164 |
}
|
165 |
|
166 |
return true;
|
167 |
|
168 |
}
|
169 |
|
170 |
int CPs::next_code(bool *valid )
|
171 |
{
|
172 |
|
173 |
if( !check_buffer(4) ) {
|
174 |
// premature file EOF : Synthesize MPEG end
|
175 |
*valid = true;
|
176 |
return 185;
|
177 |
}
|
178 |
|
179 |
if (b.ret_value(buf,(int)pos,(int)pos+2)!=1) // Invalid sync - not code sequence
|
180 |
*valid = false;
|
181 |
else
|
182 |
*valid = true;
|
183 |
|
184 |
int code = (int)b.ret_value(buf,(int)pos+3,(int)pos+3);
|
185 |
return code;
|
186 |
|
187 |
}
|
188 |
|
189 |
bool CPs::read_code(int *code )
|
190 |
{
|
191 |
|
192 |
bool rtcode;
|
193 |
*code = next_code( &rtcode );
|
194 |
pos += 4;
|
195 |
return rtcode;
|
196 |
|
197 |
}
|
198 |
|
199 |
size_t CPs::skip2code()
|
200 |
{
|
201 |
|
202 |
size_t dif = 0;
|
203 |
bool valid;
|
204 |
|
205 |
for(;;) {
|
206 |
|
207 |
if( buf_len-pos > 4 )
|
208 |
if( buf[pos] != 0 ) {
|
209 |
|
210 |
byte *p = (byte *)memchr( &buf[pos], 0, buf_len-pos );
|
211 |
if( p != NULL ) {
|
212 |
|
213 |
ptrdiff_t nch = p - &buf[pos];
|
214 |
assert(nch >= 0);
|
215 |
pos += nch;
|
216 |
dif += nch;
|
217 |
|
218 |
if( (buf_len-pos > 4) && (buf[pos+1] != '\0') ) {
|
219 |
pos++;
|
220 |
dif++;
|
221 |
continue;
|
222 |
}
|
223 |
|
224 |
}
|
225 |
|
226 |
}
|
227 |
|
228 |
next_code(&valid);
|
229 |
if( !valid ) {
|
230 |
skip_info(1);
|
231 |
dif += 1;
|
232 |
} else
|
233 |
break;
|
234 |
|
235 |
}
|
236 |
|
237 |
return dif;
|
238 |
|
239 |
}
|
240 |
|
241 |
bool CPs::end_mb( int st_bit )
|
242 |
{
|
243 |
|
244 |
check_buffer(4);
|
245 |
|
246 |
size_t p = pos;
|
247 |
for( int i=0; i<23; i++ ) {
|
248 |
|
249 |
if( b.ret_bit( buf[p], st_bit ) )
|
250 |
return false;
|
251 |
|
252 |
st_bit++;
|
253 |
if( st_bit > 0 ) {
|
254 |
st_bit = 0;
|
255 |
p++;
|
256 |
}
|
257 |
|
258 |
}
|
259 |
|
260 |
return true;
|
261 |
|
262 |
}
|
263 |
|
264 |
void CPs::skip_info(int n_bytes)
|
265 |
{
|
266 |
assert(n_bytes >= 0);
|
267 |
check_buffer(n_bytes);
|
268 |
pos=pos+n_bytes;
|
269 |
}
|
270 |
|
271 |
int CPs::ret_value(int n_bytes)
|
272 |
{
|
273 |
int val;
|
274 |
assert(n_bytes >= 0);
|
275 |
check_buffer(n_bytes);
|
276 |
val = b.ret_value(buf,(int)pos,(int)pos+n_bytes-1);
|
277 |
pos=pos+n_bytes;
|
278 |
return val;
|
279 |
}
|
280 |
|
281 |
int CPs::ret_bit_value(int st_bit,int end_bit,bool act)
|
282 |
{
|
283 |
int val;
|
284 |
check_buffer(1);
|
285 |
val=b.ret_bit_value(buf[pos],st_bit,end_bit);
|
286 |
if(act) pos++;
|
287 |
return val;
|
288 |
}
|
289 |
|
290 |
int CPs::get_bit_value( int *st_bit, int *dif, int nbits )
|
291 |
{
|
292 |
|
293 |
int val = 0;
|
294 |
int nb;
|
295 |
while( *st_bit + nbits > 7 ) {
|
296 |
|
297 |
nb = 8 - *st_bit;
|
298 |
val = (val << nb) + b.ret_bit_value( buf[pos], *st_bit, 7 );
|
299 |
|
300 |
*st_bit = 0;
|
301 |
pos++;
|
302 |
(*dif)++;
|
303 |
nbits -= nb;
|
304 |
|
305 |
} // while
|
306 |
|
307 |
if( nbits > 0 ) {
|
308 |
val = (val << nbits) + b.ret_bit_value( buf[pos], *st_bit, *st_bit + nbits - 1 );
|
309 |
*st_bit += nbits;
|
310 |
}
|
311 |
|
312 |
return val;
|
313 |
|
314 |
}
|
315 |
|
316 |
void CPs::end_PS()
|
317 |
{
|
318 |
CleanUp();
|
319 |
}
|
320 |
|
321 |
bool CPs::zero()
|
322 |
{
|
323 |
check_buffer(1);
|
324 |
if (buf[pos]==0) return true;
|
325 |
return false;
|
326 |
}
|
327 |
|
328 |
void CPs::go_back(int step)
|
329 |
{
|
330 |
assert(-step <= pos);
|
331 |
pos=pos-step;
|
332 |
}
|
333 |
|
334 |
double CPs::get_SCR()
|
335 |
{
|
336 |
int SCR;
|
337 |
double scr_val;
|
338 |
|
339 |
SCR=ret_bit_value(2,4,false); // SCR(32..30)
|
340 |
scr_val=(SCR>3)?4294967296.0:0.0; // caz pt. SCR[32]=1 -> overflow
|
341 |
SCR=SCR<<30;
|
342 |
SCR|=ret_bit_value(6,7,true)<<28; // SCR(29,28)
|
343 |
SCR|=ret_value(1)<<20; // SCR(27..20)
|
344 |
SCR|=ret_bit_value(0,4,false)<<15; // SCR(19..15)
|
345 |
SCR|=ret_bit_value(6,7,true)<<13; // SCR(14,13)
|
346 |
SCR|=ret_value(1)<<5; // SCR(12..5)
|
347 |
SCR|=ret_bit_value(0,4,false); // SCR(4..0)
|
348 |
scr_val+=SCR;
|
349 |
scr_val*=300.0;
|
350 |
SCR=ret_bit_value(6,7,true)<<7; // SCR_ext(8,7)
|
351 |
SCR|=ret_bit_value(0,6,true); // SCR_ext(6..0)
|
352 |
scr_val+=SCR;
|
353 |
return scr_val/27000.0; // 27Mhz clock
|
354 |
|
355 |
}
|
356 |
|
357 |
double CPs::get_PES_stamp()
|
358 |
{
|
359 |
|
360 |
int stamp;
|
361 |
double val;
|
362 |
|
363 |
stamp=ret_bit_value(4,6,true); // PTS(32..30)
|
364 |
val=(stamp>3)?4294967296.0:0.0; // caz de overflow (PTS[32]=1)
|
365 |
stamp=stamp<<30;
|
366 |
stamp|=ret_value(1)<<22; // PTS(29..22)
|
367 |
stamp|=ret_bit_value(0,6,true)<<15; // PTS(21..15)
|
368 |
stamp|=ret_value(1)<<7; // PTS(14..7)
|
369 |
stamp|=ret_bit_value(0,6,true); // PTS(6..0)
|
370 |
val+=stamp;
|
371 |
return val/90.0; // 90Khz clock
|
372 |
|
373 |
}
|
374 |
|
375 |
bool CPs::ret_bit(int pz)
|
376 |
{
|
377 |
return b.ret_bit(buf[pos],pz);
|
378 |
}
|