Subversion Repositories Kolibri OS

Rev

Details | Last modification | View Log | RSS feed

Rev Author Line No. Line
576 serge 1
/*
2
	tabinit.c: initialize tables...
3
 
4
	copyright ?-2006 by the mpg123 project - free software under the terms of the LGPL 2.1
5
	see COPYING and AUTHORS files in distribution or http://mpg123.de
6
	initially written by Michael Hipp
7
*/
8
 
9
//#include 
10
 
11
//#include "config.h"
12
#include "mpg123.h"
13
//#include "debug.h"
14
 
15
static unsigned char *conv16to8_buf = NULL;
16
unsigned char *conv16to8;
17
 
18
#ifndef USE_MMX
19
real decwin[512+32];
20
#ifdef USE_ALTIVEC
21
static real __attribute__ ((aligned (16))) cos64[16];
22
static real __attribute__ ((aligned (16))) cos32[8];
23
static real __attribute__ ((aligned (16))) cos16[4];
24
static real __attribute__ ((aligned (16))) cos8[2];
25
static real __attribute__ ((aligned (16))) cos4[1];
26
#else
27
static real cos64[16],cos32[8],cos16[4],cos8[2],cos4[1];
28
#endif
29
 
30
real *pnts[] = { cos64,cos32,cos16,cos8,cos4 };
31
 
32
 
33
static long intwinbase[] = {
34
     0,    -1,    -1,    -1,    -1,    -1,    -1,    -2,    -2,    -2,
35
    -2,    -3,    -3,    -4,    -4,    -5,    -5,    -6,    -7,    -7,
36
    -8,    -9,   -10,   -11,   -13,   -14,   -16,   -17,   -19,   -21,
37
   -24,   -26,   -29,   -31,   -35,   -38,   -41,   -45,   -49,   -53,
38
   -58,   -63,   -68,   -73,   -79,   -85,   -91,   -97,  -104,  -111,
39
  -117,  -125,  -132,  -139,  -147,  -154,  -161,  -169,  -176,  -183,
40
  -190,  -196,  -202,  -208,  -213,  -218,  -222,  -225,  -227,  -228,
41
  -228,  -227,  -224,  -221,  -215,  -208,  -200,  -189,  -177,  -163,
42
  -146,  -127,  -106,   -83,   -57,   -29,     2,    36,    72,   111,
43
   153,   197,   244,   294,   347,   401,   459,   519,   581,   645,
44
   711,   779,   848,   919,   991,  1064,  1137,  1210,  1283,  1356,
45
  1428,  1498,  1567,  1634,  1698,  1759,  1817,  1870,  1919,  1962,
46
  2001,  2032,  2057,  2075,  2085,  2087,  2080,  2063,  2037,  2000,
47
  1952,  1893,  1822,  1739,  1644,  1535,  1414,  1280,  1131,   970,
48
   794,   605,   402,   185,   -45,  -288,  -545,  -814, -1095, -1388,
49
 -1692, -2006, -2330, -2663, -3004, -3351, -3705, -4063, -4425, -4788,
50
 -5153, -5517, -5879, -6237, -6589, -6935, -7271, -7597, -7910, -8209,
51
 -8491, -8755, -8998, -9219, -9416, -9585, -9727, -9838, -9916, -9959,
52
 -9966, -9935, -9863, -9750, -9592, -9389, -9139, -8840, -8492, -8092,
53
 -7640, -7134, -6574, -5959, -5288, -4561, -3776, -2935, -2037, -1082,
54
   -70,   998,  2122,  3300,  4533,  5818,  7154,  8540,  9975, 11455,
55
 12980, 14548, 16155, 17799, 19478, 21189, 22929, 24694, 26482, 28289,
56
 30112, 31947, 33791, 35640, 37489, 39336, 41176, 43006, 44821, 46617,
57
 48390, 50137, 51853, 53534, 55178, 56778, 58333, 59838, 61289, 62684,
58
 64019, 65290, 66494, 67629, 68692, 69679, 70590, 71420, 72169, 72835,
59
 73415, 73908, 74313, 74630, 74856, 74992, 75038 };
60
 
61
#pragma warning(disable:4244)
62
void make_decode_tables(long scaleval)
63
{
64
  int i,j,k,kr,divv;
65
  real *costab;
66
  int idx;
67
 
68
 
69
  for(i=0;i<5;i++)
70
  {
71
    kr=0x10>>i; divv=0x40>>i;
72
    costab = pnts[i];
73
    for(k=0;k
74
      costab[k] = DOUBLE_TO_REAL(1.0 / (2.0 * cos(M_PI * ((double) k * 2.0 + 1.0) / (double) divv)));
75
 
76
  }
77
 
78
  idx = 0;
79
  scaleval = -scaleval;
80
  for(i=0,j=0;i<256;i++,j++,idx+=32)
81
  {
82
    if(idx < 512+16)
83
      decwin[idx+16] = decwin[idx] = DOUBLE_TO_REAL((double) intwinbase[j] / 65536.0 * (double) scaleval);
84
 
85
    if(i % 32 == 31)
86
      idx -= 1023;
87
    if(i % 64 == 63)
88
      scaleval = - scaleval;
89
  }
90
 
91
  for( /* i=256 */ ;i<512;i++,j--,idx+=32)
92
  {
93
    if(idx < 512+16)
94
      decwin[idx+16] = decwin[idx] = DOUBLE_TO_REAL((double) intwinbase[j] / 65536.0 * (double) scaleval);
95
 
96
    if(i % 32 == 31)
97
      idx -= 1023;
98
    if(i % 64 == 63)
99
      scaleval = - scaleval;
100
  }
101
}
102
#endif
103
 
104
#if 0
105
int make_conv16to8_table(int mode)
106
{
107
  int i;
108
 
109
  /*
110
   * ????: 8.0 is right but on SB cards '2.0' is a better value ???
111
   */
112
  const double mul = 8.0;
113
 
114
  if(!conv16to8_buf) {
115
    conv16to8_buf = (unsigned char *) malloc(8192);
116
    if(!conv16to8_buf) {
117
      error("Can't allocate 16 to 8 converter table!");
118
      return -1;
119
    }
120
    conv16to8 = conv16to8_buf + 4096;
121
  }
122
 
123
  if(mode == AUDIO_FORMAT_ULAW_8) {
124
    double m=127.0 / log(256.0);
125
    int c1;
126
 
127
    for(i=-4096;i<4096;i++) {
128
/* dunno whether this is a valid transformation rule ?!?!? */
129
      if(i < 0)
130
        c1 = 127 - (int) (log( 1.0 - 255.0 * (double) i*mul / 32768.0 ) * m);
131
      else
132
        c1 = 255 - (int) (log( 1.0 + 255.0 * (double) i*mul / 32768.0 ) * m);
133
      if(c1 < 0 || c1 > 255)
134
	fprintf(stderr,"Converror %d %d\n",i,c1);
135
      if(c1 == 0)
136
        c1 = 2;
137
      conv16to8[i] = (unsigned char) c1;
138
    }
139
  }
140
  else if(mode == AUDIO_FORMAT_SIGNED_8) {
141
    for(i=-4096;i<4096;i++) {
142
      conv16to8[i] = i>>5;
143
    }
144
  }
145
  else if(mode == AUDIO_FORMAT_UNSIGNED_8) {
146
    for(i=-4096;i<4096;i++) {
147
      conv16to8[i] = (i>>5)+128;
148
    }
149
  }
150
  else {
151
    for(i=-4096;i<4096;i++) {
152
      conv16to8[i] = 0;
153
    }
154
  }
155
	return 0;
156
}
157
 
158
 
159
#endif