pa_devs.c

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00001 
00009 /*
00010  * $Id: pa_devs.c 1891 2013-05-05 14:00:02Z rbencina $
00011  *
00012  * This program uses the PortAudio Portable Audio Library.
00013  * For more information see: http://www.portaudio.com
00014  * Copyright (c) 1999-2000 Ross Bencina and Phil Burk
00015  *
00016  * Permission is hereby granted, free of charge, to any person obtaining
00017  * a copy of this software and associated documentation files
00018  * (the "Software"), to deal in the Software without restriction,
00019  * including without limitation the rights to use, copy, modify, merge,
00020  * publish, distribute, sublicense, and/or sell copies of the Software,
00021  * and to permit persons to whom the Software is furnished to do so,
00022  * subject to the following conditions:
00023  *
00024  * The above copyright notice and this permission notice shall be
00025  * included in all copies or substantial portions of the Software.
00026  *
00027  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
00028  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
00029  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
00030  * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR
00031  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
00032  * CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
00033  * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
00034  */
00035 
00036 /*
00037  * The text above constitutes the entire PortAudio license; however, 
00038  * the PortAudio community also makes the following non-binding requests:
00039  *
00040  * Any person wishing to distribute modifications to the Software is
00041  * requested to send the modifications to the original developer so that
00042  * they can be incorporated into the canonical version. It is also 
00043  * requested that these non-binding requests be included along with the 
00044  * license above.
00045  */
00046 
00047 #include <stdio.h>
00048 #include <math.h>
00049 #include "portaudio.h"
00050 
00051 #ifdef WIN32
00052 #include <windows.h>
00053 
00054 #if PA_USE_ASIO
00055 #include "pa_asio.h"
00056 #endif
00057 #endif
00058 
00059 /*******************************************************************/
00060 static void PrintSupportedStandardSampleRates(
00061         const PaStreamParameters *inputParameters,
00062         const PaStreamParameters *outputParameters )
00063 {
00064     static double standardSampleRates[] = {
00065         8000.0, 9600.0, 11025.0, 12000.0, 16000.0, 22050.0, 24000.0, 32000.0,
00066         44100.0, 48000.0, 88200.0, 96000.0, 192000.0, -1 /* negative terminated  list */
00067     };
00068     int     i, printCount;
00069     PaError err;
00070 
00071     printCount = 0;
00072     for( i=0; standardSampleRates[i] > 0; i++ )
00073     {
00074         err = Pa_IsFormatSupported( inputParameters, outputParameters, standardSampleRates[i] );
00075         if( err == paFormatIsSupported )
00076         {
00077             if( printCount == 0 )
00078             {
00079                 printf( "\t%8.2f", standardSampleRates[i] );
00080                 printCount = 1;
00081             }
00082             else if( printCount == 4 )
00083             {
00084                 printf( ",\n\t%8.2f", standardSampleRates[i] );
00085                 printCount = 1;
00086             }
00087             else
00088             {
00089                 printf( ", %8.2f", standardSampleRates[i] );
00090                 ++printCount;
00091             }
00092         }
00093     }
00094     if( !printCount )
00095         printf( "None\n" );
00096     else
00097         printf( "\n" );
00098 }
00099 
00100 /*******************************************************************/
00101 int main(void);
00102 int main(void)
00103 {
00104     int     i, numDevices, defaultDisplayed;
00105     const   PaDeviceInfo *deviceInfo;
00106     PaStreamParameters inputParameters, outputParameters;
00107     PaError err;
00108 
00109     
00110     err = Pa_Initialize();
00111     if( err != paNoError )
00112     {
00113         printf( "ERROR: Pa_Initialize returned 0x%x\n", err );
00114         goto error;
00115     }
00116 
00117     printf( "PortAudio version number = %d\nPortAudio version text = '%s'\n",
00118             Pa_GetVersion(), Pa_GetVersionText() );
00119 
00120             
00121     numDevices = Pa_GetDeviceCount();
00122     if( numDevices < 0 )
00123     {
00124         printf( "ERROR: Pa_GetDeviceCount returned 0x%x\n", numDevices );
00125         err = numDevices;
00126         goto error;
00127     }
00128     
00129     printf( "Number of devices = %d\n", numDevices );
00130     for( i=0; i<numDevices; i++ )
00131     {
00132         deviceInfo = Pa_GetDeviceInfo( i );
00133         printf( "--------------------------------------- device #%d\n", i );
00134                 
00135     /* Mark global and API specific default devices */
00136         defaultDisplayed = 0;
00137         if( i == Pa_GetDefaultInputDevice() )
00138         {
00139             printf( "[ Default Input" );
00140             defaultDisplayed = 1;
00141         }
00142         else if( i == Pa_GetHostApiInfo( deviceInfo->hostApi )->defaultInputDevice )
00143         {
00144             const PaHostApiInfo *hostInfo = Pa_GetHostApiInfo( deviceInfo->hostApi );
00145             printf( "[ Default %s Input", hostInfo->name );
00146             defaultDisplayed = 1;
00147         }
00148         
00149         if( i == Pa_GetDefaultOutputDevice() )
00150         {
00151             printf( (defaultDisplayed ? "," : "[") );
00152             printf( " Default Output" );
00153             defaultDisplayed = 1;
00154         }
00155         else if( i == Pa_GetHostApiInfo( deviceInfo->hostApi )->defaultOutputDevice )
00156         {
00157             const PaHostApiInfo *hostInfo = Pa_GetHostApiInfo( deviceInfo->hostApi );
00158             printf( (defaultDisplayed ? "," : "[") );                
00159             printf( " Default %s Output", hostInfo->name );
00160             defaultDisplayed = 1;
00161         }
00162 
00163         if( defaultDisplayed )
00164             printf( " ]\n" );
00165 
00166     /* print device info fields */
00167 #ifdef WIN32
00168         {   /* Use wide char on windows, so we can show UTF-8 encoded device names */
00169             wchar_t wideName[MAX_PATH];
00170             MultiByteToWideChar(CP_UTF8, 0, deviceInfo->name, -1, wideName, MAX_PATH-1);
00171             wprintf( L"Name                        = %s\n", wideName );
00172         }
00173 #else
00174         printf( "Name                        = %s\n", deviceInfo->name );
00175 #endif
00176         printf( "Host API                    = %s\n",  Pa_GetHostApiInfo( deviceInfo->hostApi )->name );
00177         printf( "Max inputs = %d", deviceInfo->maxInputChannels  );
00178         printf( ", Max outputs = %d\n", deviceInfo->maxOutputChannels  );
00179 
00180         printf( "Default low input latency   = %8.4f\n", deviceInfo->defaultLowInputLatency  );
00181         printf( "Default low output latency  = %8.4f\n", deviceInfo->defaultLowOutputLatency  );
00182         printf( "Default high input latency  = %8.4f\n", deviceInfo->defaultHighInputLatency  );
00183         printf( "Default high output latency = %8.4f\n", deviceInfo->defaultHighOutputLatency  );
00184 
00185 #ifdef WIN32
00186 #if PA_USE_ASIO
00187 /* ASIO specific latency information */
00188         if( Pa_GetHostApiInfo( deviceInfo->hostApi )->type == paASIO ){
00189             long minLatency, maxLatency, preferredLatency, granularity;
00190 
00191             err = PaAsio_GetAvailableLatencyValues( i,
00192                             &minLatency, &maxLatency, &preferredLatency, &granularity );
00193 
00194             printf( "ASIO minimum buffer size    = %ld\n", minLatency  );
00195             printf( "ASIO maximum buffer size    = %ld\n", maxLatency  );
00196             printf( "ASIO preferred buffer size  = %ld\n", preferredLatency  );
00197 
00198             if( granularity == -1 )
00199                 printf( "ASIO buffer granularity     = power of 2\n" );
00200             else
00201                 printf( "ASIO buffer granularity     = %ld\n", granularity  );
00202         }
00203 #endif /* PA_USE_ASIO */
00204 #endif /* WIN32 */
00205 
00206         printf( "Default sample rate         = %8.2f\n", deviceInfo->defaultSampleRate );
00207 
00208     /* poll for standard sample rates */
00209         inputParameters.device = i;
00210         inputParameters.channelCount = deviceInfo->maxInputChannels;
00211         inputParameters.sampleFormat = paInt16;
00212         inputParameters.suggestedLatency = 0; /* ignored by Pa_IsFormatSupported() */
00213         inputParameters.hostApiSpecificStreamInfo = NULL;
00214         
00215         outputParameters.device = i;
00216         outputParameters.channelCount = deviceInfo->maxOutputChannels;
00217         outputParameters.sampleFormat = paInt16;
00218         outputParameters.suggestedLatency = 0; /* ignored by Pa_IsFormatSupported() */
00219         outputParameters.hostApiSpecificStreamInfo = NULL;
00220 
00221         if( inputParameters.channelCount > 0 )
00222         {
00223             printf("Supported standard sample rates\n for half-duplex 16 bit %d channel input = \n",
00224                     inputParameters.channelCount );
00225             PrintSupportedStandardSampleRates( &inputParameters, NULL );
00226         }
00227 
00228         if( outputParameters.channelCount > 0 )
00229         {
00230             printf("Supported standard sample rates\n for half-duplex 16 bit %d channel output = \n",
00231                     outputParameters.channelCount );
00232             PrintSupportedStandardSampleRates( NULL, &outputParameters );
00233         }
00234 
00235         if( inputParameters.channelCount > 0 && outputParameters.channelCount > 0 )
00236         {
00237             printf("Supported standard sample rates\n for full-duplex 16 bit %d channel input, %d channel output = \n",
00238                     inputParameters.channelCount, outputParameters.channelCount );
00239             PrintSupportedStandardSampleRates( &inputParameters, &outputParameters );
00240         }
00241     }
00242 
00243     Pa_Terminate();
00244 
00245     printf("----------------------------------------------\n");
00246     return 0;
00247 
00248 error:
00249     Pa_Terminate();
00250     fprintf( stderr, "Error number: %d\n", err );
00251     fprintf( stderr, "Error message: %s\n", Pa_GetErrorText( err ) );
00252     return err;
00253 }

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