AUD_ConverterFunctions.cpp

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/*
 * ***** BEGIN GPL LICENSE BLOCK *****
 *
 * Copyright 2009-2011 Jörg Hermann Müller
 *
 * This file is part of AudaSpace.
 *
 * Audaspace 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 2 of the License, or
 * (at your option) any later version.
 *
 * AudaSpace 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 Audaspace; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 *
 * ***** END GPL LICENSE BLOCK *****
 */

#include "AUD_ConverterFunctions.h"
#include "AUD_Buffer.h"

#define AUD_U8_0        0x80
#define AUD_S16_MAX     0x7FFF
#define AUD_S16_MIN     0x8000
#define AUD_S16_FLT     32767.0f
#define AUD_S32_MAX     0x7FFFFFFF
#define AUD_S32_MIN     0x80000000
#define AUD_S32_FLT     2147483647.0f
#define AUD_FLT_MAX     1.0f
#define AUD_FLT_MIN     -1.0f

void AUD_convert_u8_s16(data_t* target, data_t* source, int length)
{
    int16_t* t = (int16_t*) target;
    for(int i = length - 1; i >= 0; i--)
        t[i] = (((int16_t)source[i]) - AUD_U8_0) << 8;
}

void AUD_convert_u8_s24_be(data_t* target, data_t* source, int length)
{
    for(int i = length - 1; i >= 0; i--)
    {
        target[i*3] = source[i] - AUD_U8_0;
        target[i*3+1] = 0;
        target[i*3+2] = 0;
    }
}

void AUD_convert_u8_s24_le(data_t* target, data_t* source, int length)
{
    for(int i = length - 1; i >= 0; i--)
    {
        target[i*3+2] = source[i] - AUD_U8_0;
        target[i*3+1] = 0;
        target[i*3] = 0;
    }
}

void AUD_convert_u8_s32(data_t* target, data_t* source, int length)
{
    int32_t* t = (int32_t*) target;
    for(int i = length - 1; i >= 0; i--)
        t[i] = (((int32_t)source[i]) - AUD_U8_0) << 24;
}

void AUD_convert_u8_float(data_t* target, data_t* source, int length)
{
    float* t = (float*) target;
    for(int i = length - 1; i >= 0; i--)
        t[i] = (((int32_t)source[i]) - AUD_U8_0) / ((float)AUD_U8_0);
}

void AUD_convert_u8_double(data_t* target, data_t* source, int length)
{
    double* t = (double*) target;
    for(int i = length - 1; i >= 0; i--)
        t[i] = (((int32_t)source[i]) - AUD_U8_0) / ((double)AUD_U8_0);
}

void AUD_convert_s16_u8(data_t* target, data_t* source, int length)
{
    int16_t* s = (int16_t*) source;
    for(int i = 0; i < length; i++)
        target[i] = (unsigned char)((s[i] >> 8) + AUD_U8_0);
}

void AUD_convert_s16_s24_be(data_t* target, data_t* source, int length)
{
    int16_t* s = (int16_t*) source;
    int16_t t;
    for(int i = length - 1; i >= 0; i--)
    {
        t = s[i];
        target[i*3] = t >> 8 & 0xFF;
        target[i*3+1] = t & 0xFF;
        target[i*3+2] = 0;
    }
}

void AUD_convert_s16_s24_le(data_t* target, data_t* source, int length)
{
    int16_t* s = (int16_t*) source;
    int16_t t;
    for(int i = length - 1; i >= 0; i--)
    {
        t = s[i];
        target[i*3+2] = t >> 8 & 0xFF;
        target[i*3+1] = t & 0xFF;
        target[i*3] = 0;
    }
}

void AUD_convert_s16_s32(data_t* target, data_t* source, int length)
{
    int16_t* s = (int16_t*) source;
    int32_t* t = (int32_t*) target;
    for(int i = length - 1; i >= 0; i--)
        t[i] = ((int32_t)s[i]) << 16;
}

void AUD_convert_s16_float(data_t* target, data_t* source, int length)
{
    int16_t* s = (int16_t*) source;
    float* t = (float*) target;
    for(int i = length - 1; i >= 0; i--)
        t[i] = s[i] / AUD_S16_FLT;
}

void AUD_convert_s16_double(data_t* target, data_t* source, int length)
{
    int16_t* s = (int16_t*) source;
    double* t = (double*) target;
    for(int i = length - 1; i >= 0; i--)
        t[i] = s[i] / AUD_S16_FLT;
}

void AUD_convert_s24_u8_be(data_t* target, data_t* source, int length)
{
    for(int i = 0; i < length; i++)
        target[i] = source[i*3] ^ AUD_U8_0;
}

void AUD_convert_s24_u8_le(data_t* target, data_t* source, int length)
{
    for(int i = 0; i < length; i++)
        target[i] = source[i*3+2] ^ AUD_U8_0;
}

void AUD_convert_s24_s16_be(data_t* target, data_t* source, int length)
{
    int16_t* t = (int16_t*) target;
    for(int i = 0; i < length; i++)
        t[i] = source[i*3] << 8 | source[i*3+1];
}

void AUD_convert_s24_s16_le(data_t* target, data_t* source, int length)
{
    int16_t* t = (int16_t*) target;
    for(int i = 0; i < length; i++)
        t[i] = source[i*3+2] << 8 | source[i*3+1];
}

void AUD_convert_s24_s24(data_t* target, data_t* source, int length)
{
    memcpy(target, source, length * 3);
}

void AUD_convert_s24_s32_be(data_t* target, data_t* source, int length)
{
    int32_t* t = (int32_t*) target;
    for(int i = length - 1; i >= 0; i--)
        t[i] = source[i*3] << 24 | source[i*3+1] << 16 | source[i*3+2] << 8;
}

void AUD_convert_s24_s32_le(data_t* target, data_t* source, int length)
{
    int32_t* t = (int32_t*) target;
    for(int i = length - 1; i >= 0; i--)
        t[i] = source[i*3+2] << 24 | source[i*3+1] << 16 | source[i*3] << 8;
}

void AUD_convert_s24_float_be(data_t* target, data_t* source, int length)
{
    float* t = (float*) target;
    int32_t s;
    for(int i = length - 1; i >= 0; i--)
    {
        s = source[i*3] << 24 | source[i*3+1] << 16 | source[i*3+2] << 8;
        t[i] = s / AUD_S32_FLT;
    }
}

void AUD_convert_s24_float_le(data_t* target, data_t* source, int length)
{
    float* t = (float*) target;
    int32_t s;
    for(int i = length - 1; i >= 0; i--)
    {
        s = source[i*3+2] << 24 | source[i*3+1] << 16 | source[i*3] << 8;
        t[i] = s / AUD_S32_FLT;
    }
}

void AUD_convert_s24_double_be(data_t* target, data_t* source, int length)
{
    double* t = (double*) target;
    int32_t s;
    for(int i = length - 1; i >= 0; i--)
    {
        s = source[i*3] << 24 | source[i*3+1] << 16 | source[i*3+2] << 8;
        t[i] = s / AUD_S32_FLT;
    }
}

void AUD_convert_s24_double_le(data_t* target, data_t* source, int length)
{
    double* t = (double*) target;
    int32_t s;
    for(int i = length - 1; i >= 0; i--)
    {
        s = source[i*3+2] << 24 | source[i*3+1] << 16 | source[i*3] << 8;
        t[i] = s / AUD_S32_FLT;
    }
}

void AUD_convert_s32_u8(data_t* target, data_t* source, int length)
{
    int16_t* s = (int16_t*) source;
    for(int i = 0; i < length; i++)
        target[i] = (unsigned char)((s[i] >> 24) + AUD_U8_0);
}

void AUD_convert_s32_s16(data_t* target, data_t* source, int length)
{
    int16_t* t = (int16_t*) target;
    int32_t* s = (int32_t*) source;
    for(int i = 0; i < length; i++)
        t[i] = s[i] >> 16;
}

void AUD_convert_s32_s24_be(data_t* target, data_t* source, int length)
{
    int32_t* s = (int32_t*) source;
    int32_t t;
    for(int i = 0; i < length; i++)
    {
        t = s[i];
        target[i*3] = t >> 24 & 0xFF;
        target[i*3+1] = t >> 16 & 0xFF;
        target[i*3+2] = t >> 8 & 0xFF;
    }
}

void AUD_convert_s32_s24_le(data_t* target, data_t* source, int length)
{
    int32_t* s = (int32_t*) source;
    int32_t t;
    for(int i = 0; i < length; i++)
    {
        t = s[i];
        target[i*3+2] = t >> 24 & 0xFF;
        target[i*3+1] = t >> 16 & 0xFF;
        target[i*3] = t >> 8 & 0xFF;
    }
}

void AUD_convert_s32_float(data_t* target, data_t* source, int length)
{
    int32_t* s = (int32_t*) source;
    float* t = (float*) target;
    for(int i = 0; i < length; i++)
        t[i] = s[i] / AUD_S32_FLT;
}

void AUD_convert_s32_double(data_t* target, data_t* source, int length)
{
    int32_t* s = (int32_t*) source;
    double* t = (double*) target;
    for(int i = length - 1; i >= 0; i--)
        t[i] = s[i] / AUD_S32_FLT;
}

void AUD_convert_float_u8(data_t* target, data_t* source, int length)
{
    float* s = (float*) source;
    float t;
    for(int i = 0; i < length; i++)
    {
        t = s[i] + AUD_FLT_MAX;
        if(t <= 0.0f)
            target[i] = 0;
        else if(t >= 2.0f)
            target[i] = 255;
        else
            target[i] = (unsigned char)(t*127);
    }
}

void AUD_convert_float_s16(data_t* target, data_t* source, int length)
{
    int16_t* t = (int16_t*) target;
    float* s = (float*) source;
    for(int i = 0; i < length; i++)
    {
        if(s[i] <= AUD_FLT_MIN)
            t[i] = AUD_S16_MIN;
        else if(s[i] >= AUD_FLT_MAX)
            t[i] = AUD_S16_MAX;
        else
            t[i] = (int16_t)(s[i] * AUD_S16_MAX);
    }
}

void AUD_convert_float_s24_be(data_t* target, data_t* source, int length)
{
    int32_t t;
    float* s = (float*) source;
    for(int i = 0; i < length; i++)
    {
        if(s[i] <= AUD_FLT_MIN)
            t = AUD_S32_MIN;
        else if(s[i] >= AUD_FLT_MAX)
            t = AUD_S32_MAX;
        else
            t = (int32_t)(s[i]*AUD_S32_MAX);
        target[i*3] = t >> 24 & 0xFF;
        target[i*3+1] = t >> 16 & 0xFF;
        target[i*3+2] = t >> 8 & 0xFF;
    }
}

void AUD_convert_float_s24_le(data_t* target, data_t* source, int length)
{
    int32_t t;
    float* s = (float*) source;
    for(int i = 0; i < length; i++)
    {
        if(s[i] <= AUD_FLT_MIN)
            t = AUD_S32_MIN;
        else if(s[i] >= AUD_FLT_MAX)
            t = AUD_S32_MAX;
        else
            t = (int32_t)(s[i]*AUD_S32_MAX);
        target[i*3+2] = t >> 24 & 0xFF;
        target[i*3+1] = t >> 16 & 0xFF;
        target[i*3] = t >> 8 & 0xFF;
    }
}

void AUD_convert_float_s32(data_t* target, data_t* source, int length)
{
    int32_t* t = (int32_t*) target;
    float* s = (float*) source;
    for(int i = 0; i < length; i++)
    {
        if(s[i] <= AUD_FLT_MIN)
            t[i] = AUD_S32_MIN;
        else if(s[i] >= AUD_FLT_MAX)
            t[i] = AUD_S32_MAX;
        else
            t[i] = (int32_t)(s[i]*AUD_S32_MAX);
    }
}

void AUD_convert_float_double(data_t* target, data_t* source, int length)
{
    float* s = (float*) source;
    double* t = (double*) target;
    for(int i = length - 1; i >= 0; i--)
        t[i] = s[i];
}

void AUD_convert_double_u8(data_t* target, data_t* source, int length)
{
    double* s = (double*) source;
    double t;
    for(int i = 0; i < length; i++)
    {
        t = s[i] + AUD_FLT_MAX;
        if(t <= 0.0)
            target[i] = 0;
        else if(t >= 2.0)
            target[i] = 255;
        else
            target[i] = (unsigned char)(t*127);
    }
}

void AUD_convert_double_s16(data_t* target, data_t* source, int length)
{
    int16_t* t = (int16_t*) target;
    double* s = (double*) source;
    for(int i = 0; i < length; i++)
    {
        if(s[i] <= AUD_FLT_MIN)
            t[i] = AUD_S16_MIN;
        else if(s[i] >= AUD_FLT_MAX)
            t[i] = AUD_S16_MAX;
        else
            t[i] = (int16_t)(s[i]*AUD_S16_MAX);
    }
}

void AUD_convert_double_s24_be(data_t* target, data_t* source, int length)
{
    int32_t t;
    double* s = (double*) source;
    for(int i = 0; i < length; i++)
    {
        if(s[i] <= AUD_FLT_MIN)
            t = AUD_S32_MIN;
        else if(s[i] >= AUD_FLT_MAX)
            t = AUD_S32_MAX;
        else
            t = (int32_t)(s[i]*AUD_S32_MAX);
        target[i*3] = t >> 24 & 0xFF;
        target[i*3+1] = t >> 16 & 0xFF;
        target[i*3+2] = t >> 8 & 0xFF;
    }
}

void AUD_convert_double_s24_le(data_t* target, data_t* source, int length)
{
    int32_t t;
    double* s = (double*) source;
    for(int i = 0; i < length; i++)
    {
        if(s[i] <= AUD_FLT_MIN)
            t = AUD_S32_MIN;
        else if(s[i] >= AUD_FLT_MAX)
            t = AUD_S32_MAX;
        else
            t = (int32_t)(s[i]*AUD_S32_MAX);
        target[i*3+2] = t >> 24 & 0xFF;
        target[i*3+1] = t >> 16 & 0xFF;
        target[i*3] = t >> 8 & 0xFF;
    }
}

void AUD_convert_double_s32(data_t* target, data_t* source, int length)
{
    int32_t* t = (int32_t*) target;
    double* s = (double*) source;
    for(int i = 0; i < length; i++)
    {
        if(s[i] <= AUD_FLT_MIN)
            t[i] = AUD_S32_MIN;
        else if(s[i] >= AUD_FLT_MAX)
            t[i] = AUD_S32_MAX;
        else
            t[i] = (int32_t)(s[i]*AUD_S32_MAX);
    }
}

void AUD_convert_double_float(data_t* target, data_t* source, int length)
{
    double* s = (double*) source;
    float* t = (float*) target;
    for(int i = 0; i < length; i++)
        t[i] = s[i];
}