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/***************************************************************************
* Copyright (C) 2010 by Ilya Kotov *
* forkotov02@hotmail.ru *
* *
* This program 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. *
* *
* This program 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, write to the *
* Free Software Foundation, Inc., *
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. *
***************************************************************************/
#include "audioconverter_p.h"
//static functions
static inline void s8_to_s16(qint8 *in, qint16 *out, qint64 samples)
{
for(qint64 i = 0; i < samples; ++i)
out[i] = in[i] << 8;
return;
}
static inline void s24_to_s16(qint32 *in, qint16 *out, qint64 samples)
{
for(qint64 i = 0; i < samples; ++i)
out[i] = in[i] >> 8;
return;
}
static inline void s32_to_s16(qint32 *in, qint16 *out, qint64 samples)
{
for(qint64 i = 0; i < samples; ++i)
out[i] = in[i] >> 16;
return;
}
AudioConverter::AudioConverter()
{
m_format = Qmmp::PCM_UNKNOWM;
}
void AudioConverter::configure(quint32 srate, int chan, Qmmp::AudioFormat f)
{
m_format = f;
Effect::configure(srate, chan, Qmmp::PCM_S16LE);
}
void AudioConverter::applyEffect(Buffer *b)
{
switch(m_format)
{
case Qmmp::PCM_S8:
{
unsigned char *out = new unsigned char[b->nbytes*2];
s8_to_s16((qint8 *)b->data, (qint16 *) out, b->nbytes);
delete [] b->data;
b->data = out;
b->nbytes <<= 1;
break;
}
case Qmmp::PCM_S24LE:
s24_to_s16((qint32 *)b->data, (qint16 *)b->data, b->nbytes >> 2);
b->nbytes >>= 1;
break;
case Qmmp::PCM_S32LE:
s32_to_s16((qint32 *)b->data, (qint16 *)b->data, b->nbytes >> 2);
b->nbytes >>= 1;
break;
default:
;
}
}
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