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AudioTools.cpp
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90 lines (83 loc) · 2.5 KB
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/*
* (C) 2013 see Authors.txt
*
* This file is part of MPC-HC.
*
* MPC-HC is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* MPC-HC is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
*/
#include "stdafx.h"
#include "AudioTools.h"
void gain_uint8(const double factor, const size_t allsamples, uint8_t* pData)
{
uint8_t* end = pData + allsamples;
for (; pData < end; ++pData) {
double d = factor * (int8_t)(*pData ^ 0x80);
limit(INT8_MIN, d, INT8_MAX);
*pData = (uint8_t)(int8_t)d ^ 0x80;
}
}
void gain_int16(const double factor, const size_t allsamples, int16_t* pData)
{
int16_t* end = pData + allsamples;
for (; pData < end; ++pData) {
double d = factor * (*pData);
limit(INT16_MIN, d, INT16_MAX);
*pData = (int16_t)d;
}
}
void gain_int24(const double factor, const size_t allsamples, BYTE* pData)
{
BYTE* end = pData + allsamples * 3;
while (pData < end) {
int32_t i32 = 0;
BYTE* p = (BYTE*)(&i32);
p[1] = *(pData);
p[2] = *(pData + 1);
p[3] = *(pData + 2);
double d = factor * i32;
limit(INT32_MIN, d, INT32_MAX);
i32 = (int32_t)d;
*pData++ = p[1];
*pData++ = p[2];
*pData++ = p[3];
}
}
void gain_int32(const double factor, const size_t allsamples, int32_t* pData)
{
int32_t* end = pData + allsamples;
for (; pData < end; ++pData) {
double d = factor * (*pData);
limit(INT32_MIN, d, INT32_MAX);
*pData = (int32_t)d;
}
}
void gain_float(const double factor, const size_t allsamples, float* pData)
{
float* end = pData + allsamples;
for (; pData < end; ++pData) {
double d = factor * (*pData);
limit(-1.0, d, 1.0);
*pData = (float)d;
}
}
void gain_double(const double factor, const size_t allsamples, double* pData)
{
double* end = pData + allsamples;
for (; pData < end; ++pData) {
double d = factor * (*pData);
limit(-1.0, d, 1.0);
*pData = d;
}
}