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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.
+*/
+/*
+ * $Id$
+ *
+ * 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: 0x%08X\n", Pa_GetVersion());
+ printf( "Version text: '%s'\n", Pa_GetVersionInfo()->versionText );
+
+ 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;
+}