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/*
* PortAudio Portable Real-Time Audio Library
* Latest Version at: http://www.portaudio.com
*
* Copyright (c) 1999-2010 Phil Burk and Ross Bencina
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files
* (the "Software"), to deal in the Software without restriction,
* including without limitation the rights to use, copy, modify, merge,
* publish, distribute, sublicense, and/or sell copies of the Software,
* and to permit persons to whom the Software is furnished to do so,
* subject to the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR
* ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
* CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
/*
* The text above constitutes the entire PortAudio license; however,
* the PortAudio community also makes the following non-binding requests:
*
* Any person wishing to distribute modifications to the Software is
* requested to send the modifications to the original developer so that
* they can be incorporated into the canonical version. It is also
* requested that these non-binding requests be included along with the
* license above.
*/
#include "paqa_tools.h"
/*******************************************************************/
void PaQa_ListAudioDevices(void)
{
int i, numDevices;
const PaDeviceInfo *deviceInfo;
numDevices = Pa_GetDeviceCount();
for( i=0; i<numDevices; i++ )
{
deviceInfo = Pa_GetDeviceInfo( i );
printf( "#%d: ", i );
printf( "%2d in", deviceInfo->maxInputChannels );
printf( ", %2d out", deviceInfo->maxOutputChannels );
printf( ", %s", deviceInfo->name );
printf( ", on %s\n", Pa_GetHostApiInfo( deviceInfo->hostApi )->name );
}
}
/*******************************************************************/
void PaQa_ConvertToFloat( const void *input, int numSamples, PaSampleFormat inFormat, float *output )
{
int i;
switch( inFormat )
{
case paUInt8:
{
unsigned char *data = (unsigned char *)input;
for( i=0; i<numSamples; i++ )
{
int value = *data++;
value -= 128;
*output++ = value / 128.0f;
}
}
break;
case paInt8:
{
char *data = (char *)input;
for( i=0; i<numSamples; i++ )
{
int value = *data++;
*output++ = value / 128.0f;
}
}
break;
case paInt16:
{
short *data = (short *)input;
for( i=0; i<numSamples; i++ )
{
*output++ = *data++ / 32768.0f;
}
}
break;
case paInt32:
{
int *data = (int *)input;
for( i=0; i<numSamples; i++ )
{
int value = (*data++) >> 8;
float fval = (float) (value / ((double) 0x00800000));
*output++ = fval;
}
}
break;
}
}
/*******************************************************************/
void PaQa_ConvertFromFloat( const float *input, int numSamples, PaSampleFormat outFormat, void *output )
{
int i;
switch( outFormat )
{
case paUInt8:
{
unsigned char *data = (unsigned char *)output;
for( i=0; i<numSamples; i++ )
{
float value = *input++;
int byte = ((int) (value * 127)) + 128;
*data++ = (unsigned char) byte;
}
}
break;
case paInt8:
{
char *data = (char *)output;
for( i=0; i<numSamples; i++ )
{
float value = *input++;
int byte = (int) (value * 127);
*data++ = (char) byte;
}
}
break;
case paInt16:
{
short *data = (short *)output;
for( i=0; i<numSamples; i++ )
{
float value = *input++;
// Use asymmetric conversion to avoid clipping.
short sval = value * 32767.0;
*data++ = sval;
}
}
break;
case paInt32:
{
int *data = (int *)output;
for( i=0; i<numSamples; i++ )
{
float value = *input++;
// Use asymmetric conversion to avoid clipping.
int ival = value * ((double) 0x007FFFF0);
ival = ival << 8;
*data++ = ival;
}
}
break;
}
}
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