diff options
Diffstat (limited to 'apps/codecs/libmusepack/requant.c')
| -rw-r--r-- | apps/codecs/libmusepack/requant.c | 70 |
1 files changed, 65 insertions, 5 deletions
diff --git a/apps/codecs/libmusepack/requant.c b/apps/codecs/libmusepack/requant.c index 5a113b0885..fc27dfd199 100644 --- a/apps/codecs/libmusepack/requant.c +++ b/apps/codecs/libmusepack/requant.c @@ -39,6 +39,7 @@ #include "mpcdec_math.h" #include "decoder.h" #include "internal.h" +#include <string.h> /* C O N S T A N T S */ // Bits per sample for chosen quantizer @@ -70,6 +71,64 @@ const mpc_int16_t __Dc [1 + 18] ICONST_ATTR = { 127, 255, 511, 1023, 2047, 4095, 8191, 16383, 32767 }; +// Table'ized SCF calculated from mpc_decoder_scale_output(d, 1.0) +static const mpc_uint32_t SCF[] = { + 1289035711, 1073741824, 1788812356, 1490046106, 1241179595, 1033878604, 861200887, 717363687, + 597550081, 497747664, 414614180, 345365595, 287682863, 239634262, 199610707, 166271859, + 138501244, 115368858, 96100028, 80049465, 66679657, 55542865, 46266132, 38538793, + 32102070, 26740403, 22274239, 18554010, 15455132, 12873826, 10723648, 8932591, + 7440676, 6197939, 5162763, 4300482, 3582218, 2983918, 2485546, 2070412, + 1724613, 1436569, 1196634, 996773, 830293, 691618, 576104, 479883, + 399734, 332970, 277358, 231034, 192446, 160304, 133530, 111228, + 92651, 77176, 64286, 53549, 44605, 37155, 30949, 25780, + 21474, 17888, 14900, 12411, 10338, 8612, 7173, 5975, + 4977, 4146, 3453, 2876, 2396, 1996, 1662, 1385, + 1153, 961, 800, 666, 555, 462, 385, 321, + 267, 222, 185, 154, 128, 107, 89, 74, + 61, 51, 43, 35, 29, 24, 20, 17, + 14, 11, 9, 8, 6, 5, 4, 3, + 3, 2, 2, 1, 1, 1, 1, 0, + 0, 0, 0, 0, 0, 0, 0, 0, + 0, 2147483648, 2147483648, 2147483648, 2147483648, 2147483648, 2147483648, 2147483648, + 2147483648, 2147483648, 2147483648, 2147483648, 1930697728, 1608233877, 1339627724, 1115883992, + 1859019579, 1548527365, 1289893354, 1074456223, 1790002518, 1491037488, 1242005398, 2069132964, + 1723547752, 1435681952, 1195895306, 1992315335, 1659560152, 1382381519, 1151497076, 1918349601, + 1597948125, 1331059892, 1108747153, 1847129882, 1538623477, 1281643607, 2135168687, 1778554232, + 1481501287, 1234061927, 2055899448, 1712524489, 1426499787, 1188246741, 1979573121, 1648946134, + 1373540247, 1144132468, 1906080447, 1587728158, 1322546856, 1101655960, 1835316227, 1528782931, + 1273446622, 2121512828, 1767179166, 1472026076, 1226169259, 2042750570, 1701571728, 1417376349, + 1180647093, 1966912401, 1638400000, 1364755521, 1136814961, 1893889764, 1577573554, 1314088268, + 1094610119, 1823578129, 1519005322, 1265302063, 2107944308, 1755876851, 1462611466, 1218327071, + 2029685788, 1690689017, 1408311261, 1173096050, 1954332656, 1627921315, 1356026979, 1129544254, + 1881777048, 1567483896, 1305683778, 1087609341, 1811915104, 1509290248, 1257209594, 2094462567, + 1744646821, 1453257069, 1210535039, 2016704564, 1679875908, 1399304151, 1165593302, 1941833367, + 1617509648, 1347354262, 1122320049, 1869741801, 1557458768, 1297333040, 1080653338, 1800326672, + 1499637308, 1249168882, 2081067051, 1733488616, 1443962500, 1202792843, 2003806364, 1669131957, + 1390354647, 1158138538, 1929414019, 1607164572, 1338737013, 1115142047, 1857783528, 1547497758 +}; + +// Table'ized SCF_shift calculated from mpc_decoder_scale_output(d, 1.0) +static const mpc_uint8_t SCF_shift[] = { + 30, 30, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, + 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, + 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, + 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, + 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, + 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, + 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, + 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, + 31, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 1, 1, 1, 1, 2, 2, 2, 3, 3, 3, 3, 4, 4, 4, 4, 5, + 5, 5, 5, 6, 6, 6, 7, 7, 7, 7, 8, 8, 8, 8, 9, 9, + 9, 9, 10, 10, 10, 10, 11, 11, 11, 12, 12, 12, 12, 13, 13, 13, + 13, 14, 14, 14, 14, 15, 15, 15, 15, 16, 16, 16, 17, 17, 17, 17, + 18, 18, 18, 18, 19, 19, 19, 19, 20, 20, 20, 20, 21, 21, 21, 22, + 22, 22, 22, 23, 23, 23, 23, 24, 24, 24, 24, 25, 25, 25, 25, 26, + 26, 26, 27, 27, 27, 27, 28, 28, 28, 28, 29, 29, 29, 29, 30, 30 +}; + +/* F U N C T I O N S */ +/* not used anymore, tables from above are used #ifdef MPC_FIXED_POINT static mpc_uint32_t find_shift(double fval) { @@ -86,8 +145,6 @@ static mpc_uint32_t find_shift(double fval) } #endif -/* F U N C T I O N S */ - #define SET_SCF(N,X) d->SCF[N] = MAKE_MPC_SAMPLE_EX(X,d->SCF_shift[N] = (mpc_uint8_t) find_shift(X)); static void @@ -116,9 +173,12 @@ mpc_decoder_scale_output(mpc_decoder *d, double factor) f2 *= 1/0.83298066476582673961; } } - +*/ void -mpc_decoder_init_quant(mpc_decoder *d, double scale_factor) +mpc_decoder_init_quant(mpc_decoder *d, MPC_SAMPLE_FORMAT factor) { - mpc_decoder_scale_output(d, scale_factor); + //mpc_decoder_scale_output(d, (double)factor / MPC_FIXED_POINT_SHIFT) + (void)factor; + memcpy(d->SCF, SCF, sizeof(d->SCF)); + memcpy(d->SCF_shift, SCF_shift, sizeof(d->SCF_shift)); } |