Cinelerra: hvirtual/quicktime/ffmpeg/libavcodec/ac3tab.h Source File

00001 
00006 /* possible frequencies */
00007 static const uint16_t ac3_freqs[3] = { 48000, 44100, 32000 };
00008 
00009 /* possible bitrates */
00010 static const uint16_t ac3_bitratetab[19] = {
00011     32, 40, 48, 56, 64, 80, 96, 112, 128, 
00012     160, 192, 224, 256, 320, 384, 448, 512, 576, 640 
00013 };
00014 
00015 /* AC3 MDCT window */
00016 
00017 /* MDCT window */
00018 static const int16_t ac3_window[256] = {
00019     4,    7,   12,   16,   21,   28,   34,   42,
00020    51,   61,   72,   84,   97,  111,  127,  145,
00021   164,  184,  207,  231,  257,  285,  315,  347,
00022   382,  419,  458,  500,  544,  591,  641,  694,
00023   750,  810,  872,  937, 1007, 1079, 1155, 1235,
00024  1318, 1406, 1497, 1593, 1692, 1796, 1903, 2016,
00025  2132, 2253, 2379, 2509, 2644, 2783, 2927, 3076,
00026  3230, 3389, 3552, 3721, 3894, 4072, 4255, 4444,
00027  4637, 4835, 5038, 5246, 5459, 5677, 5899, 6127,
00028  6359, 6596, 6837, 7083, 7334, 7589, 7848, 8112,
00029  8380, 8652, 8927, 9207, 9491, 9778,10069,10363,
00030 10660,10960,11264,11570,11879,12190,12504,12820,
00031 13138,13458,13780,14103,14427,14753,15079,15407,
00032 15735,16063,16392,16720,17049,17377,17705,18032,
00033 18358,18683,19007,19330,19651,19970,20287,20602,
00034 20914,21225,21532,21837,22139,22438,22733,23025,
00035 23314,23599,23880,24157,24430,24699,24964,25225,
00036 25481,25732,25979,26221,26459,26691,26919,27142,
00037 27359,27572,27780,27983,28180,28373,28560,28742,
00038 28919,29091,29258,29420,29577,29729,29876,30018,
00039 30155,30288,30415,30538,30657,30771,30880,30985,
00040 31086,31182,31274,31363,31447,31528,31605,31678,
00041 31747,31814,31877,31936,31993,32046,32097,32145,
00042 32190,32232,32272,32310,32345,32378,32409,32438,
00043 32465,32490,32513,32535,32556,32574,32592,32608,
00044 32623,32636,32649,32661,32671,32681,32690,32698,
00045 32705,32712,32718,32724,32729,32733,32737,32741,
00046 32744,32747,32750,32752,32754,32756,32757,32759,
00047 32760,32761,32762,32763,32764,32764,32765,32765,
00048 32766,32766,32766,32766,32767,32767,32767,32767,
00049 32767,32767,32767,32767,32767,32767,32767,32767,
00050 32767,32767,32767,32767,32767,32767,32767,32767,  
00051 };
00052 
00053 static uint8_t masktab[253];
00054 
00055 static const uint8_t latab[260]= {
00056 0x0040,0x003f,0x003e,0x003d,0x003c,0x003b,0x003a,0x0039,0x0038,0x0037,
00057 0x0036,0x0035,0x0034,0x0034,0x0033,0x0032,0x0031,0x0030,0x002f,0x002f,
00058 0x002e,0x002d,0x002c,0x002c,0x002b,0x002a,0x0029,0x0029,0x0028,0x0027,
00059 0x0026,0x0026,0x0025,0x0024,0x0024,0x0023,0x0023,0x0022,0x0021,0x0021,
00060 0x0020,0x0020,0x001f,0x001e,0x001e,0x001d,0x001d,0x001c,0x001c,0x001b,
00061 0x001b,0x001a,0x001a,0x0019,0x0019,0x0018,0x0018,0x0017,0x0017,0x0016,
00062 0x0016,0x0015,0x0015,0x0015,0x0014,0x0014,0x0013,0x0013,0x0013,0x0012,
00063 0x0012,0x0012,0x0011,0x0011,0x0011,0x0010,0x0010,0x0010,0x000f,0x000f,
00064 0x000f,0x000e,0x000e,0x000e,0x000d,0x000d,0x000d,0x000d,0x000c,0x000c,
00065 0x000c,0x000c,0x000b,0x000b,0x000b,0x000b,0x000a,0x000a,0x000a,0x000a,
00066 0x000a,0x0009,0x0009,0x0009,0x0009,0x0009,0x0008,0x0008,0x0008,0x0008,
00067 0x0008,0x0008,0x0007,0x0007,0x0007,0x0007,0x0007,0x0007,0x0006,0x0006,
00068 0x0006,0x0006,0x0006,0x0006,0x0006,0x0006,0x0005,0x0005,0x0005,0x0005,
00069 0x0005,0x0005,0x0005,0x0005,0x0004,0x0004,0x0004,0x0004,0x0004,0x0004,
00070 0x0004,0x0004,0x0004,0x0004,0x0004,0x0003,0x0003,0x0003,0x0003,0x0003,
00071 0x0003,0x0003,0x0003,0x0003,0x0003,0x0003,0x0003,0x0003,0x0003,0x0002,
00072 0x0002,0x0002,0x0002,0x0002,0x0002,0x0002,0x0002,0x0002,0x0002,0x0002,
00073 0x0002,0x0002,0x0002,0x0002,0x0002,0x0002,0x0002,0x0002,0x0001,0x0001,
00074 0x0001,0x0001,0x0001,0x0001,0x0001,0x0001,0x0001,0x0001,0x0001,0x0001,
00075 0x0001,0x0001,0x0001,0x0001,0x0001,0x0001,0x0001,0x0001,0x0001,0x0001,
00076 0x0001,0x0001,0x0001,0x0001,0x0001,0x0001,0x0001,0x0001,0x0001,0x0001,
00077 0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,
00078 0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,
00079 0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,
00080 0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,
00081 0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,0x0000,
00082 };
00083 
00084 static const uint16_t hth[50][3]= {
00085 { 0x04d0,0x04f0,0x0580 },
00086 { 0x04d0,0x04f0,0x0580 },
00087 { 0x0440,0x0460,0x04b0 },
00088 { 0x0400,0x0410,0x0450 },
00089 { 0x03e0,0x03e0,0x0420 },
00090 { 0x03c0,0x03d0,0x03f0 },
00091 { 0x03b0,0x03c0,0x03e0 },
00092 { 0x03b0,0x03b0,0x03d0 },
00093 { 0x03a0,0x03b0,0x03c0 },
00094 { 0x03a0,0x03a0,0x03b0 },
00095 { 0x03a0,0x03a0,0x03b0 },
00096 { 0x03a0,0x03a0,0x03b0 },
00097 { 0x03a0,0x03a0,0x03a0 },
00098 { 0x0390,0x03a0,0x03a0 },
00099 { 0x0390,0x0390,0x03a0 },
00100 { 0x0390,0x0390,0x03a0 },
00101 { 0x0380,0x0390,0x03a0 },
00102 { 0x0380,0x0380,0x03a0 },
00103 { 0x0370,0x0380,0x03a0 },
00104 { 0x0370,0x0380,0x03a0 },
00105 { 0x0360,0x0370,0x0390 },
00106 { 0x0360,0x0370,0x0390 },
00107 { 0x0350,0x0360,0x0390 },
00108 { 0x0350,0x0360,0x0390 },
00109 { 0x0340,0x0350,0x0380 },
00110 { 0x0340,0x0350,0x0380 },
00111 { 0x0330,0x0340,0x0380 },
00112 { 0x0320,0x0340,0x0370 },
00113 { 0x0310,0x0320,0x0360 },
00114 { 0x0300,0x0310,0x0350 },
00115 { 0x02f0,0x0300,0x0340 },
00116 { 0x02f0,0x02f0,0x0330 },
00117 { 0x02f0,0x02f0,0x0320 },
00118 { 0x02f0,0x02f0,0x0310 },
00119 { 0x0300,0x02f0,0x0300 },
00120 { 0x0310,0x0300,0x02f0 },
00121 { 0x0340,0x0320,0x02f0 },
00122 { 0x0390,0x0350,0x02f0 },
00123 { 0x03e0,0x0390,0x0300 },
00124 { 0x0420,0x03e0,0x0310 },
00125 { 0x0460,0x0420,0x0330 },
00126 { 0x0490,0x0450,0x0350 },
00127 { 0x04a0,0x04a0,0x03c0 },
00128 { 0x0460,0x0490,0x0410 },
00129 { 0x0440,0x0460,0x0470 },
00130 { 0x0440,0x0440,0x04a0 },
00131 { 0x0520,0x0480,0x0460 },
00132 { 0x0800,0x0630,0x0440 },
00133 { 0x0840,0x0840,0x0450 },
00134 { 0x0840,0x0840,0x04e0 },
00135 };
00136 
00137 static const uint8_t baptab[64]= {
00138     0, 1, 1, 1, 1, 1, 2, 2, 3, 3, 
00139     3, 4, 4, 5, 5, 6, 6, 6, 6, 7, 
00140     7, 7, 7, 8, 8, 8, 8, 9, 9, 9, 
00141     9, 10, 10, 10, 10, 11, 11, 11, 11, 12, 
00142     12, 12, 12, 13, 13, 13, 13, 14, 14, 14, 
00143     14, 14, 14, 14, 14, 15, 15, 15, 15, 15, 
00144     15, 15, 15, 15,
00145 };
00146 
00147 static const uint8_t sdecaytab[4]={ 
00148     0x0f, 0x11, 0x13, 0x15,
00149 };
00150 
00151 static const uint8_t fdecaytab[4]={ 
00152     0x3f, 0x53, 0x67, 0x7b, 
00153 };
00154 
00155 static const uint16_t sgaintab[4]= { 
00156     0x540, 0x4d8, 0x478, 0x410,
00157 };
00158 
00159 static const uint16_t dbkneetab[4]= { 
00160     0x000, 0x700, 0x900, 0xb00,
00161 };
00162 
00163 static const uint16_t floortab[8]= { 
00164     0x2f0, 0x2b0, 0x270, 0x230, 0x1f0, 0x170, 0x0f0, 0xf800,
00165 };
00166 
00167 static const uint16_t fgaintab[8]= {
00168     0x080, 0x100, 0x180, 0x200, 0x280, 0x300, 0x380, 0x400,
00169 };
00170 
00171 static const uint8_t bndsz[50]={
00172     1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 
00173     1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 3, 3, 3, 3, 3, 3, 
00174     3, 6, 6, 6, 6, 6, 6, 12, 12, 12, 12, 24, 24, 24, 24, 24 
00175 };
00176 
00177 static uint8_t bndtab[51]; 
00178 
00179 /* fft & mdct sin cos tables */
00180 static int16_t costab[64];
00181 static int16_t sintab[64];
00182 static int16_t fft_rev[512];
00183 static int16_t xcos1[128];
00184 static int16_t xsin1[128];
00185 
00186 static uint16_t crc_table[256];