forked from len0rd/rockbox
Add codecs to librbcodec.
Change-Id: Id7f4717d51ed02d67cb9f9cb3c0ada4a81843f97 Reviewed-on: http://gerrit.rockbox.org/137 Reviewed-by: Nils Wallménius <nils@rockbox.org> Tested-by: Nils Wallménius <nils@rockbox.org>
This commit is contained in:
Sean Bartell
Nils Wallménius
parent
a0009907de
commit
f40bfc9267
757 changed files with 122 additions and 122 deletions
184
lib/rbcodec/codecs/libmusepack/requant.c
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184
lib/rbcodec/codecs/libmusepack/requant.c
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/*
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Copyright (c) 2005-2009, The Musepack Development Team
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All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions are
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met:
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* Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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* Redistributions in binary form must reproduce the above
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copyright notice, this list of conditions and the following
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disclaimer in the documentation and/or other materials provided
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with the distribution.
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* Neither the name of the The Musepack Development Team nor the
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names of its contributors may be used to endorse or promote
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products derived from this software without specific prior
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written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/// \file requant.c
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/// Requantization function implementations.
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/// \todo document me
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#include "mpcdec.h"
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#include "requant.h"
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#include "mpcdec_math.h"
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#include "decoder.h"
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#include "internal.h"
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#include <string.h>
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/* C O N S T A N T S */
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// Bits per sample for chosen quantizer
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const mpc_uint8_t Res_bit [18] ICONST_ATTR = {
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0, 0, 0, 0, 0, 0, 0, 0, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16
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};
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// Requantization coefficients
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// 65536/step bzw. 65536/(2*D+1)
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#define _(X) MAKE_MPC_SAMPLE_EX(X,14)
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const MPC_SAMPLE_FORMAT __Cc [1 + 18] ICONST_ATTR = {
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_(111.285962475327f), // 32768/2/255*sqrt(3)
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_(65536.000000000000f), _(21845.333333333332f), _(13107.200000000001f), _(9362.285714285713f),
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_(7281.777777777777f), _(4369.066666666666f), _(2114.064516129032f), _(1040.253968253968f),
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_(516.031496062992f), _(257.003921568627f), _(128.250489236790f), _(64.062561094819f),
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_(32.015632633121f), _(16.003907203907f), _(8.000976681723f), _(4.000244155527f),
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_(2.000061037018f), _(1.000015259021f)
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};
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#undef _
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// Requantization offset
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// 2*D+1 = steps of quantizer
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const mpc_int16_t __Dc [1 + 18] ICONST_ATTR = {
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2,
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0, 1, 2, 3, 4, 7, 15, 31, 63,
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127, 255, 511, 1023, 2047, 4095, 8191, 16383, 32767
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};
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// Table'ized SCF calculated from mpc_decoder_scale_output(d, 1.0)
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static const mpc_uint32_t SCF[] = {
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1289035711, 1073741824, 1788812356, 1490046106, 1241179595, 1033878604, 861200887, 717363687,
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597550081, 497747664, 414614180, 345365595, 287682863, 239634262, 199610707, 166271859,
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138501244, 115368858, 96100028, 80049465, 66679657, 55542865, 46266132, 38538793,
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32102070, 26740403, 22274239, 18554010, 15455132, 12873826, 10723648, 8932591,
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7440676, 6197939, 5162763, 4300482, 3582218, 2983918, 2485546, 2070412,
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1724613, 1436569, 1196634, 996773, 830293, 691618, 576104, 479883,
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399734, 332970, 277358, 231034, 192446, 160304, 133530, 111228,
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92651, 77176, 64286, 53549, 44605, 37155, 30949, 25780,
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21474, 17888, 14900, 12411, 10338, 8612, 7173, 5975,
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4977, 4146, 3453, 2876, 2396, 1996, 1662, 1385,
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1153, 961, 800, 666, 555, 462, 385, 321,
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267, 222, 185, 154, 128, 107, 89, 74,
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61, 51, 43, 35, 29, 24, 20, 17,
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14, 11, 9, 8, 6, 5, 4, 3,
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3, 2, 2, 1, 1, 1, 1, 0,
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0, 0, 0, 0, 0, 0, 0, 0,
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0, 2147483648, 2147483648, 2147483648, 2147483648, 2147483648, 2147483648, 2147483648,
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2147483648, 2147483648, 2147483648, 2147483648, 1930697728, 1608233877, 1339627724, 1115883992,
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1859019579, 1548527365, 1289893354, 1074456223, 1790002518, 1491037488, 1242005398, 2069132964,
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1723547752, 1435681952, 1195895306, 1992315335, 1659560152, 1382381519, 1151497076, 1918349601,
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1597948125, 1331059892, 1108747153, 1847129882, 1538623477, 1281643607, 2135168687, 1778554232,
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1481501287, 1234061927, 2055899448, 1712524489, 1426499787, 1188246741, 1979573121, 1648946134,
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1373540247, 1144132468, 1906080447, 1587728158, 1322546856, 1101655960, 1835316227, 1528782931,
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1273446622, 2121512828, 1767179166, 1472026076, 1226169259, 2042750570, 1701571728, 1417376349,
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1180647093, 1966912401, 1638400000, 1364755521, 1136814961, 1893889764, 1577573554, 1314088268,
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1094610119, 1823578129, 1519005322, 1265302063, 2107944308, 1755876851, 1462611466, 1218327071,
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2029685788, 1690689017, 1408311261, 1173096050, 1954332656, 1627921315, 1356026979, 1129544254,
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1881777048, 1567483896, 1305683778, 1087609341, 1811915104, 1509290248, 1257209594, 2094462567,
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1744646821, 1453257069, 1210535039, 2016704564, 1679875908, 1399304151, 1165593302, 1941833367,
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1617509648, 1347354262, 1122320049, 1869741801, 1557458768, 1297333040, 1080653338, 1800326672,
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1499637308, 1249168882, 2081067051, 1733488616, 1443962500, 1202792843, 2003806364, 1669131957,
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1390354647, 1158138538, 1929414019, 1607164572, 1338737013, 1115142047, 1857783528, 1547497758
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};
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// Table'ized SCF_shift calculated from mpc_decoder_scale_output(d, 1.0)
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static const mpc_uint8_t SCF_shift[] = {
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30, 30, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31,
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31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31,
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31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31,
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31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31,
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31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31,
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31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31,
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31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31,
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31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31, 31,
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31, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
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1, 1, 1, 1, 2, 2, 2, 3, 3, 3, 3, 4, 4, 4, 4, 5,
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5, 5, 5, 6, 6, 6, 7, 7, 7, 7, 8, 8, 8, 8, 9, 9,
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9, 9, 10, 10, 10, 10, 11, 11, 11, 12, 12, 12, 12, 13, 13, 13,
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13, 14, 14, 14, 14, 15, 15, 15, 15, 16, 16, 16, 17, 17, 17, 17,
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18, 18, 18, 18, 19, 19, 19, 19, 20, 20, 20, 20, 21, 21, 21, 22,
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22, 22, 22, 23, 23, 23, 23, 24, 24, 24, 24, 25, 25, 25, 25, 26,
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26, 26, 27, 27, 27, 27, 28, 28, 28, 28, 29, 29, 29, 29, 30, 30
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};
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/* F U N C T I O N S */
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/* not used anymore, tables from above are used
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#ifdef MPC_FIXED_POINT
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static mpc_uint32_t find_shift(double fval)
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{
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mpc_int64_t val = (mpc_int64_t) fval;
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mpc_uint32_t ptr = 0;
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if(val<0)
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val = -val;
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while(val)
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{
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val >>= 1;
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ptr++;
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}
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return ptr > 31 ? 0 : 31 - ptr;
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}
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#endif
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#define SET_SCF(N,X) d->SCF[N] = MAKE_MPC_SAMPLE_EX(X,d->SCF_shift[N] = (mpc_uint8_t) find_shift(X));
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static void
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mpc_decoder_scale_output(mpc_decoder *d, double factor)
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{
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mpc_int32_t n; double f1, f2;
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#ifndef MPC_FIXED_POINT
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factor *= 1.0 / (double) (1<<(MPC_FIXED_POINT_SHIFT-1));
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#else
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factor *= 1.0 / (double) (1<<(16-MPC_FIXED_POINT_SHIFT));
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#endif
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f1 = f2 = factor;
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// handles +1.58...-98.41 dB, where's scf[n] / scf[n-1] = 1.20050805774840750476
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SET_SCF(1,factor);
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f1 *= 0.83298066476582673961;
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f2 *= 1/0.83298066476582673961;
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for ( n = 1; n <= 128; n++ ) {
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SET_SCF((mpc_uint8_t)(1+n),f1);
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SET_SCF((mpc_uint8_t)(1-n),f2);
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f1 *= 0.83298066476582673961;
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f2 *= 1/0.83298066476582673961;
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}
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}
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*/
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void
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mpc_decoder_init_quant(mpc_decoder *d, MPC_SAMPLE_FORMAT factor)
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{
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//mpc_decoder_scale_output(d, (double)factor / MPC_FIXED_POINT_SHIFT)
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(void)factor;
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memcpy(d->SCF, SCF, sizeof(d->SCF));
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memcpy(d->SCF_shift, SCF_shift, sizeof(d->SCF_shift));
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}
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