e4217d4845
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@24788 a1c6a512-1295-4272-9138-f99709370657
108 lines
5.5 KiB
C
108 lines
5.5 KiB
C
/***************************************************************************
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* __________ __ ___.
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* Open \______ \ ____ ____ | | _\_ |__ _______ ___
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* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
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* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
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* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
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* \/ \/ \/ \/ \/
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* $Id$
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*
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* Copyright (C) 2009 Michael Giacomelli
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* Copyright (C) 2009 Mohamed Tarek
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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****************************************************************************/
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/* tables for the scalefactor decoding */
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/* scaled by 2^31*/
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static const int32_t iMaxQuant_fix[8] ICONST_ATTR = {
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0x0, 0x55555580, 0x33333340, 0x24924940, 0x1c71c720, 0x11111120, 0x8421080,
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0x4104108
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};
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/* scaled by 2^16 */
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static const int32_t SFTable_fixed[64] ICONST_ATTR = {
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0x00000800, 0x00000a14, 0x00000cb3, 0x00001000, 0x00001429, 0x00001966,
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0x00002000, 0x00002851, 0x000032cc, 0x00004000, 0x000050a3, 0x00006598,
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0x00008000, 0x0000a145, 0x0000cb30, 0x00010000, 0x0001428a, 0x00019660,
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0x00020000, 0x00028514, 0x00032cc0, 0x00040000, 0x00050a29, 0x00065980,
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0x00080000, 0x000a1452, 0x000cb2ff, 0x00100000, 0x001428a3, 0x001965ff,
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0x00200000, 0x00285146, 0x0032cbfd, 0x00400000, 0x0050a28c, 0x006597fb,
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0x00800000, 0x00a14518, 0x00cb2ff5, 0x01000000, 0x01428a30, 0x01965fea,
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0x02000000, 0x02851460, 0x032cbfd4, 0x04000000, 0x050a28c0, 0x06597fa8,
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0x08000000, 0x0a145180, 0x0cb2ff50, 0x10000000, 0x1428a300, 0x1965fea0,
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0x20000000, 0x28514600, 0x32cbfd40, 0x40000000, 0x50a28c00, 0x6597fa80,
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0x80000000, 0x80000000, 0x80000000, 0x80000000,
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};
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/* transform data */
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/* floating point values scaled by 2^31 */
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static const int32_t qmf_48tap_half_fix[24] = {
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0xffff855e, 0xfffcfbca, 0xfffe28eb, 0x0009de6b, 0x0007f028, 0xffe40d08,
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0xffeef140, 0x0042a692, 0x0019ab1f, 0xff75dec7, 0xffe738f5, 0x0100e928,
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0xfffdfedf, 0xfe478b84, 0x0050b279, 0x02c83f88, 0xff005ad7, 0xfba2ee80,
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0x02685970, 0x06f42798, 0xfa6b6f10, 0xf3475f80, 0x10e7f7c0, 0x3b6c44c0
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};
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/* mdct window scaled by 2^31 */
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/* Remark: The preceding sign corrects the sign of the hexadecimal values */
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static const int32_t window_lookup[128] ICONST_ATTR = {
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-0xffffb10c, -0xfffd394b, -0xfff8494f, -0xfff0e025, -0xffe6fc5f, -0xffda9c15,
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-0xffcbbce6, -0xffba5bf4, -0xffa675e8, -0xff9006f0, -0xff770aba, -0xff5b7c7e,
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-0xff3d56f2, -0xff1c9452, -0xfef92e59, -0xfed31e45, -0xfeaa5cd5, -0xfe7ee247,
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-0xfe50a657, -0xfe1fa041, -0xfdebc6c1, -0xfdb5100d, -0xfd7b71d5, -0xfd3ee149,
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-0xfcff5311, -0xfcbcbb49, -0xfc770d99, -0xfc2e3d15, -0xfbe23c39, -0xfb92fd29,
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-0xfb407141, -0xfaea8989, -0xfa913661, -0xfa3467b1, -0xf9d40cd9, -0xf9701499,
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-0xf9086d41, -0xf89d04a9, -0xf82dc7f1, -0xf7baa3e1, -0xf74384b1, -0xf6c85611,
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-0xf6490321, -0xf5c576b1, -0xf53d9b21, -0xf4b15a01, -0xf4209ce1, -0xf38b4c71,
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-0xf2f15171, -0xf2529411, -0xf1aefbf1, -0xf10670a1, -0xf058d941, -0xefa61cc1,
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-0xeeee21c1, -0xee30cec1, -0xed6e0a41, -0xeca5ba61, -0xebd7c5c1, -0xeb041241,
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-0xea2a8601, -0xe94b0861, -0xe8657f61, -0xe779d241, -0xe687e861, -0xe58fa9e1,
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-0xe490fec1, -0xe38bd101, -0xe28009c1, -0xe16d93e1, -0xe0545ba1, -0xdf344dc1,
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-0xde0d5881, -0xdcdf6bc1, -0xdbaa7801, -0xda6e70c1, -0xd92b4ac1, -0xd7e0fc81,
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-0xd68f7ec1, -0xd536cd41, -0xd3d6e5c1, -0xd26fc901, -0xd10179c1, -0xcf8bff41,
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-0xce0f6301, -0xcc8bb241, -0xcb00fdc1, -0xc96f5b01, -0xc7d6e141, -0xc637af41,
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-0xc491e4c1, -0xc2e5a801, -0xc1332401, -0xbf7a8701, -0xbdbc0681, -0xbbf7da01,
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-0xba2e4181, -0xb85f7f81, -0xb68bde01, -0xb4b3a981, -0xb2d73781, -0xb0f6df01,
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-0xaf12ff01, -0xad2bfa81, -0xab423981, -0xa9562981, -0xa7683c01, -0xa578e701,
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-0xa388a681, -0xa197f801, -0x9fa75e81, -0x9db75f01, -0x9bc88201, -0x99db5301,
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-0x97f06001, -0x96083601, -0x94236601, -0x92427f81, -0x90661481, -0x8e8eb481,
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-0x8cbced01, -0x8af14d81, -0x892c5f81, -0x876eab01, -0x85b8b681, -0x840b0301,
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-0x82660c01, -0x80ca4a01,
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};
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/* Gain tables scaled by 2^16 */
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static const int32_t gain_tab2[31] ICONST_ATTR = {
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0x0003ab03, 0x00035d14, 0x0003159d, 0x0002d414, 0x000297fb, 0x000260e0,
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0x00022e57, 0x00020000, 0x0001d582, 0x0001ae8a, 0x00018ace, 0x00016a0a,
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0x00014bfe, 0x00013070, 0x0001172c, 0x00010000, 0x0000eac1, 0x0000d745,
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0x0000c567, 0x0000b505, 0x0000a5ff, 0x00009838, 0x00008b96, 0x00008000,
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0x00007560, 0x00006ba2, 0x000062b4, 0x00005a82, 0x000052ff, 0x00004c1c,
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0x000045cb,
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};
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/* Joint-Stereo related tables, scaled by 2^16 */
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static const int32_t matrixCoeffs_fix[8] ICONST_ATTR = {
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0x00000000, 0x00020000, 0x00020000, 0x00020000,
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0x00000000, 0x00000000, 0x00010000, 0x00010000,
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};
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/* channelWeights0[i] = ONE_16 * ((i & 7)/7) */
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static const int32_t channelWeights0[8] = {
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0x00000000, 0x00002492, 0x00004925, 0x00006DB7,
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0x00009249, 0x0000B6DB, 0x0000DB6D, 0x00010000,
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};
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/* channelWeights1[i] = ONE_16 * sqrt(2-channelWeights0^2) */
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static const int32_t channelWeights1[8] = {
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0x00016A0A, 0x00016830, 0x00016293, 0x00015904,
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0x00014B2B, 0x00013877, 0x00011FF7, 0x00010000,
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};
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