120 lines
6.5 KiB
C++
120 lines
6.5 KiB
C++
/****************************************************************************
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* *
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* Project64 - A Nintendo 64 emulator. *
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* http://www.pj64-emu.com/ *
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* Copyright (C) 2016 Project64. All rights reserved. *
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* Copyright (C) 2014 Bobby Smiles *
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* *
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* License: *
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* GNU/GPLv2 http://www.gnu.org/licenses/gpl-2.0.html *
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* version 2 of the License, or (at your option) any later version. *
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* *
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****************************************************************************/
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#include "stdafx.h"
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#include <assert.h>
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#include "audio.h"
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#include "arithmetics.h"
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const int16_t RESAMPLE_LUT[64 * 4] =
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{
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(int16_t)0x0c39u, (int16_t)0x66adu, (int16_t)0x0d46u, (int16_t)0xffdfu,
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(int16_t)0x0b39u, (int16_t)0x6696u, (int16_t)0x0e5fu, (int16_t)0xffd8u,
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(int16_t)0x0a44u, (int16_t)0x6669u, (int16_t)0x0f83u, (int16_t)0xffd0u,
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(int16_t)0x095au, (int16_t)0x6626u, (int16_t)0x10b4u, (int16_t)0xffc8u,
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(int16_t)0x087du, (int16_t)0x65cdu, (int16_t)0x11f0u, (int16_t)0xffbfu,
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(int16_t)0x07abu, (int16_t)0x655eu, (int16_t)0x1338u, (int16_t)0xffb6u,
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(int16_t)0x06e4u, (int16_t)0x64d9u, (int16_t)0x148cu, (int16_t)0xffacu,
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(int16_t)0x0628u, (int16_t)0x643fu, (int16_t)0x15ebu, (int16_t)0xffa1u,
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(int16_t)0x0577u, (int16_t)0x638fu, (int16_t)0x1756u, (int16_t)0xff96u,
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(int16_t)0x04d1u, (int16_t)0x62cbu, (int16_t)0x18cbu, (int16_t)0xff8au,
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(int16_t)0x0435u, (int16_t)0x61f3u, (int16_t)0x1a4cu, (int16_t)0xff7eu,
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(int16_t)0x03a4u, (int16_t)0x6106u, (int16_t)0x1bd7u, (int16_t)0xff71u,
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(int16_t)0x031cu, (int16_t)0x6007u, (int16_t)0x1d6cu, (int16_t)0xff64u,
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(int16_t)0x029fu, (int16_t)0x5ef5u, (int16_t)0x1f0bu, (int16_t)0xff56u,
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(int16_t)0x022au, (int16_t)0x5dd0u, (int16_t)0x20b3u, (int16_t)0xff48u,
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(int16_t)0x01beu, (int16_t)0x5c9au, (int16_t)0x2264u, (int16_t)0xff3au,
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(int16_t)0x015bu, (int16_t)0x5b53u, (int16_t)0x241eu, (int16_t)0xff2cu,
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(int16_t)0x0101u, (int16_t)0x59fcu, (int16_t)0x25e0u, (int16_t)0xff1eu,
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(int16_t)0x00aeu, (int16_t)0x5896u, (int16_t)0x27a9u, (int16_t)0xff10u,
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(int16_t)0x0063u, (int16_t)0x5720u, (int16_t)0x297au, (int16_t)0xff02u,
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(int16_t)0x001fu, (int16_t)0x559du, (int16_t)0x2b50u, (int16_t)0xfef4u,
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(int16_t)0xffe2u, (int16_t)0x540du, (int16_t)0x2d2cu, (int16_t)0xfee8u,
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(int16_t)0xffacu, (int16_t)0x5270u, (int16_t)0x2f0du, (int16_t)0xfedbu,
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(int16_t)0xff7cu, (int16_t)0x50c7u, (int16_t)0x30f3u, (int16_t)0xfed0u,
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(int16_t)0xff53u, (int16_t)0x4f14u, (int16_t)0x32dcu, (int16_t)0xfec6u,
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(int16_t)0xff2eu, (int16_t)0x4d57u, (int16_t)0x34c8u, (int16_t)0xfebdu,
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(int16_t)0xff0fu, (int16_t)0x4b91u, (int16_t)0x36b6u, (int16_t)0xfeb6u,
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(int16_t)0xfef5u, (int16_t)0x49c2u, (int16_t)0x38a5u, (int16_t)0xfeb0u,
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(int16_t)0xfedfu, (int16_t)0x47edu, (int16_t)0x3a95u, (int16_t)0xfeacu,
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(int16_t)0xfeceu, (int16_t)0x4611u, (int16_t)0x3c85u, (int16_t)0xfeabu,
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(int16_t)0xfec0u, (int16_t)0x4430u, (int16_t)0x3e74u, (int16_t)0xfeacu,
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(int16_t)0xfeb6u, (int16_t)0x424au, (int16_t)0x4060u, (int16_t)0xfeafu,
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(int16_t)0xfeafu, (int16_t)0x4060u, (int16_t)0x424au, (int16_t)0xfeb6u,
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(int16_t)0xfeacu, (int16_t)0x3e74u, (int16_t)0x4430u, (int16_t)0xfec0u,
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(int16_t)0xfeabu, (int16_t)0x3c85u, (int16_t)0x4611u, (int16_t)0xfeceu,
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(int16_t)0xfeacu, (int16_t)0x3a95u, (int16_t)0x47edu, (int16_t)0xfedfu,
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(int16_t)0xfeb0u, (int16_t)0x38a5u, (int16_t)0x49c2u, (int16_t)0xfef5u,
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(int16_t)0xfeb6u, (int16_t)0x36b6u, (int16_t)0x4b91u, (int16_t)0xff0fu,
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(int16_t)0xfebdu, (int16_t)0x34c8u, (int16_t)0x4d57u, (int16_t)0xff2eu,
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(int16_t)0xfec6u, (int16_t)0x32dcu, (int16_t)0x4f14u, (int16_t)0xff53u,
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(int16_t)0xfed0u, (int16_t)0x30f3u, (int16_t)0x50c7u, (int16_t)0xff7cu,
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(int16_t)0xfedbu, (int16_t)0x2f0du, (int16_t)0x5270u, (int16_t)0xffacu,
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(int16_t)0xfee8u, (int16_t)0x2d2cu, (int16_t)0x540du, (int16_t)0xffe2u,
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(int16_t)0xfef4u, (int16_t)0x2b50u, (int16_t)0x559du, (int16_t)0x001fu,
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(int16_t)0xff02u, (int16_t)0x297au, (int16_t)0x5720u, (int16_t)0x0063u,
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(int16_t)0xff10u, (int16_t)0x27a9u, (int16_t)0x5896u, (int16_t)0x00aeu,
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(int16_t)0xff1eu, (int16_t)0x25e0u, (int16_t)0x59fcu, (int16_t)0x0101u,
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(int16_t)0xff2cu, (int16_t)0x241eu, (int16_t)0x5b53u, (int16_t)0x015bu,
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(int16_t)0xff3au, (int16_t)0x2264u, (int16_t)0x5c9au, (int16_t)0x01beu,
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(int16_t)0xff48u, (int16_t)0x20b3u, (int16_t)0x5dd0u, (int16_t)0x022au,
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(int16_t)0xff56u, (int16_t)0x1f0bu, (int16_t)0x5ef5u, (int16_t)0x029fu,
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(int16_t)0xff64u, (int16_t)0x1d6cu, (int16_t)0x6007u, (int16_t)0x031cu,
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(int16_t)0xff71u, (int16_t)0x1bd7u, (int16_t)0x6106u, (int16_t)0x03a4u,
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(int16_t)0xff7eu, (int16_t)0x1a4cu, (int16_t)0x61f3u, (int16_t)0x0435u,
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(int16_t)0xff8au, (int16_t)0x18cbu, (int16_t)0x62cbu, (int16_t)0x04d1u,
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(int16_t)0xff96u, (int16_t)0x1756u, (int16_t)0x638fu, (int16_t)0x0577u,
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(int16_t)0xffa1u, (int16_t)0x15ebu, (int16_t)0x643fu, (int16_t)0x0628u,
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(int16_t)0xffacu, (int16_t)0x148cu, (int16_t)0x64d9u, (int16_t)0x06e4u,
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(int16_t)0xffb6u, (int16_t)0x1338u, (int16_t)0x655eu, (int16_t)0x07abu,
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(int16_t)0xffbfu, (int16_t)0x11f0u, (int16_t)0x65cdu, (int16_t)0x087du,
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(int16_t)0xffc8u, (int16_t)0x10b4u, (int16_t)0x6626u, (int16_t)0x095au,
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(int16_t)0xffd0u, (int16_t)0x0f83u, (int16_t)0x6669u, (int16_t)0x0a44u,
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(int16_t)0xffd8u, (int16_t)0x0e5fu, (int16_t)0x6696u, (int16_t)0x0b39u,
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(int16_t)0xffdfu, (int16_t)0x0d46u, (int16_t)0x66adu, (int16_t)0x0c39u
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};
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int32_t rdot(size_t n, const int16_t *x, const int16_t *y)
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{
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int32_t accu = 0;
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y += n;
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while (n != 0) {
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accu += *(x++) * *(--y);
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--n;
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}
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return accu;
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}
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void adpcm_compute_residuals(int16_t* dst, const int16_t* src,
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const int16_t* cb_entry, const int16_t* last_samples, size_t count)
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{
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const int16_t* const book1 = cb_entry;
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const int16_t* const book2 = cb_entry + 8;
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const int16_t l1 = last_samples[0];
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const int16_t l2 = last_samples[1];
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size_t i;
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assert(count <= 8);
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for (i = 0; i < count; ++i)
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{
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int32_t accu = (int32_t)src[i] << 11;
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accu += book1[i] * l1 + book2[i] * l2 + rdot(i, book2, src);
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dst[i] = clamp_s16(accu >> 11);
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}
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} |