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portaudio/examples/pa_devs.c

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/** @file pa_devs.c
@ingroup examples_src
@brief List available devices, including device information.
@author Phil Burk http://www.softsynth.com
@note Define PA_USE_ASIO=0 to compile this code on Windows without
ASIO support.
*/
/*
* $Id: pa_devs.c 1891 2013-05-05 14:00:02Z rbencina $
*
* This program uses the PortAudio Portable Audio Library.
* For more information see: http://www.portaudio.com
* Copyright (c) 1999-2000 Ross Bencina and Phil Burk
*
* 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 <stdio.h>
#include <math.h>
#include "portaudio.h"
#ifdef WIN32
#include <windows.h>
#if PA_USE_ASIO
#include "pa_asio.h"
#endif
#endif
/*******************************************************************/
static void PrintSupportedStandardSampleRates(
const PaStreamParameters *inputParameters,
const PaStreamParameters *outputParameters )
{
static double standardSampleRates[] = {
8000.0, 9600.0, 11025.0, 12000.0, 16000.0, 22050.0, 24000.0, 32000.0,
44100.0, 48000.0, 88200.0, 96000.0, 192000.0, -1 /* negative terminated list */
};
int i, printCount;
PaError err;
printCount = 0;
for( i=0; standardSampleRates[i] > 0; i++ )
{
err = Pa_IsFormatSupported( inputParameters, outputParameters, standardSampleRates[i] );
if( err == paFormatIsSupported )
{
if( printCount == 0 )
{
printf( "\t%8.2f", standardSampleRates[i] );
printCount = 1;
}
else if( printCount == 4 )
{
printf( ",\n\t%8.2f", standardSampleRates[i] );
printCount = 1;
}
else
{
printf( ", %8.2f", standardSampleRates[i] );
++printCount;
}
}
}
if( !printCount )
printf( "None\n" );
else
printf( "\n" );
}
/*******************************************************************/
int main(void);
int main(void)
{
int i, numDevices, defaultDisplayed;
const PaDeviceInfo *deviceInfo;
PaStreamParameters inputParameters, outputParameters;
PaError err;
err = Pa_Initialize();
if( err != paNoError )
{
printf( "ERROR: Pa_Initialize returned 0x%x\n", err );
goto error;
}
printf( "PortAudio version number = %d\nPortAudio version text = '%s'\n",
Pa_GetVersion(), Pa_GetVersionText() );
numDevices = Pa_GetDeviceCount();
if( numDevices < 0 )
{
printf( "ERROR: Pa_GetDeviceCount returned 0x%x\n", numDevices );
err = numDevices;
goto error;
}
printf( "Number of devices = %d\n", numDevices );
for( i=0; i<numDevices; i++ )
{
deviceInfo = Pa_GetDeviceInfo( i );
printf( "--------------------------------------- device #%d\n", i );
/* Mark global and API specific default devices */
defaultDisplayed = 0;
if( i == Pa_GetDefaultInputDevice() )
{
printf( "[ Default Input" );
defaultDisplayed = 1;
}
else if( i == Pa_GetHostApiInfo( deviceInfo->hostApi )->defaultInputDevice )
{
const PaHostApiInfo *hostInfo = Pa_GetHostApiInfo( deviceInfo->hostApi );
printf( "[ Default %s Input", hostInfo->name );
defaultDisplayed = 1;
}
if( i == Pa_GetDefaultOutputDevice() )
{
printf( (defaultDisplayed ? "," : "[") );
printf( " Default Output" );
defaultDisplayed = 1;
}
else if( i == Pa_GetHostApiInfo( deviceInfo->hostApi )->defaultOutputDevice )
{
const PaHostApiInfo *hostInfo = Pa_GetHostApiInfo( deviceInfo->hostApi );
printf( (defaultDisplayed ? "," : "[") );
printf( " Default %s Output", hostInfo->name );
defaultDisplayed = 1;
}
if( defaultDisplayed )
printf( " ]\n" );
/* print device info fields */
#ifdef WIN32
{ /* Use wide char on windows, so we can show UTF-8 encoded device names */
wchar_t wideName[MAX_PATH];
MultiByteToWideChar(CP_UTF8, 0, deviceInfo->name, -1, wideName, MAX_PATH-1);
wprintf( L"Name = %s\n", wideName );
}
#else
printf( "Name = %s\n", deviceInfo->name );
#endif
printf( "Host API = %s\n", Pa_GetHostApiInfo( deviceInfo->hostApi )->name );
printf( "Max inputs = %d", deviceInfo->maxInputChannels );
printf( ", Max outputs = %d\n", deviceInfo->maxOutputChannels );
printf( "Default low input latency = %8.4f\n", deviceInfo->defaultLowInputLatency );
printf( "Default low output latency = %8.4f\n", deviceInfo->defaultLowOutputLatency );
printf( "Default high input latency = %8.4f\n", deviceInfo->defaultHighInputLatency );
printf( "Default high output latency = %8.4f\n", deviceInfo->defaultHighOutputLatency );
#ifdef WIN32
#if PA_USE_ASIO
/* ASIO specific latency information */
if( Pa_GetHostApiInfo( deviceInfo->hostApi )->type == paASIO ){
long minLatency, maxLatency, preferredLatency, granularity;
err = PaAsio_GetAvailableLatencyValues( i,
&minLatency, &maxLatency, &preferredLatency, &granularity );
printf( "ASIO minimum buffer size = %ld\n", minLatency );
printf( "ASIO maximum buffer size = %ld\n", maxLatency );
printf( "ASIO preferred buffer size = %ld\n", preferredLatency );
if( granularity == -1 )
printf( "ASIO buffer granularity = power of 2\n" );
else
printf( "ASIO buffer granularity = %ld\n", granularity );
}
#endif /* PA_USE_ASIO */
#endif /* WIN32 */
printf( "Default sample rate = %8.2f\n", deviceInfo->defaultSampleRate );
/* poll for standard sample rates */
inputParameters.device = i;
inputParameters.channelCount = deviceInfo->maxInputChannels;
inputParameters.sampleFormat = paInt16;
inputParameters.suggestedLatency = 0; /* ignored by Pa_IsFormatSupported() */
inputParameters.hostApiSpecificStreamInfo = NULL;
outputParameters.device = i;
outputParameters.channelCount = deviceInfo->maxOutputChannels;
outputParameters.sampleFormat = paInt16;
outputParameters.suggestedLatency = 0; /* ignored by Pa_IsFormatSupported() */
outputParameters.hostApiSpecificStreamInfo = NULL;
if( inputParameters.channelCount > 0 )
{
printf("Supported standard sample rates\n for half-duplex 16 bit %d channel input = \n",
inputParameters.channelCount );
PrintSupportedStandardSampleRates( &inputParameters, NULL );
}
if( outputParameters.channelCount > 0 )
{
printf("Supported standard sample rates\n for half-duplex 16 bit %d channel output = \n",
outputParameters.channelCount );
PrintSupportedStandardSampleRates( NULL, &outputParameters );
}
if( inputParameters.channelCount > 0 && outputParameters.channelCount > 0 )
{
printf("Supported standard sample rates\n for full-duplex 16 bit %d channel input, %d channel output = \n",
inputParameters.channelCount, outputParameters.channelCount );
PrintSupportedStandardSampleRates( &inputParameters, &outputParameters );
}
}
Pa_Terminate();
printf("----------------------------------------------\n");
return 0;
error:
Pa_Terminate();
fprintf( stderr, "Error number: %d\n", err );
fprintf( stderr, "Error message: %s\n", Pa_GetErrorText( err ) );
return err;
}
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