PortAudio  2.0
pa_devs.c
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00001 
00009 /*
00010  * $Id: pa_devs.c 1752 2011-09-08 03:21:55Z philburk $
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 #if PA_USE_ASIO
00053 #include "pa_asio.h"
00054 #endif
00055 #endif
00056 
00057 /*******************************************************************/
00058 static void PrintSupportedStandardSampleRates(
00059         const PaStreamParameters *inputParameters,
00060         const PaStreamParameters *outputParameters )
00061 {
00062     static double standardSampleRates[] = {
00063         8000.0, 9600.0, 11025.0, 12000.0, 16000.0, 22050.0, 24000.0, 32000.0,
00064         44100.0, 48000.0, 88200.0, 96000.0, 192000.0, -1 /* negative terminated  list */
00065     };
00066     int     i, printCount;
00067     PaError err;
00068 
00069     printCount = 0;
00070     for( i=0; standardSampleRates[i] > 0; i++ )
00071     {
00072         err = Pa_IsFormatSupported( inputParameters, outputParameters, standardSampleRates[i] );
00073         if( err == paFormatIsSupported )
00074         {
00075             if( printCount == 0 )
00076             {
00077                 printf( "\t%8.2f", standardSampleRates[i] );
00078                 printCount = 1;
00079             }
00080             else if( printCount == 4 )
00081             {
00082                 printf( ",\n\t%8.2f", standardSampleRates[i] );
00083                 printCount = 1;
00084             }
00085             else
00086             {
00087                 printf( ", %8.2f", standardSampleRates[i] );
00088                 ++printCount;
00089             }
00090         }
00091     }
00092     if( !printCount )
00093         printf( "None\n" );
00094     else
00095         printf( "\n" );
00096 }
00097 
00098 /*******************************************************************/
00099 int main(void);
00100 int main(void)
00101 {
00102     int     i, numDevices, defaultDisplayed;
00103     const   PaDeviceInfo *deviceInfo;
00104     PaStreamParameters inputParameters, outputParameters;
00105     PaError err;
00106 
00107     
00108     Pa_Initialize();
00109 
00110     printf( "PortAudio version number = %d\nPortAudio version text = '%s'\n",
00111             Pa_GetVersion(), Pa_GetVersionText() );
00112 
00113             
00114     numDevices = Pa_GetDeviceCount();
00115     if( numDevices < 0 )
00116     {
00117         printf( "ERROR: Pa_GetDeviceCount returned 0x%x\n", numDevices );
00118         err = numDevices;
00119         goto error;
00120     }
00121     
00122     printf( "Number of devices = %d\n", numDevices );
00123     for( i=0; i<numDevices; i++ )
00124     {
00125         deviceInfo = Pa_GetDeviceInfo( i );
00126         printf( "--------------------------------------- device #%d\n", i );
00127                 
00128     /* Mark global and API specific default devices */
00129         defaultDisplayed = 0;
00130         if( i == Pa_GetDefaultInputDevice() )
00131         {
00132             printf( "[ Default Input" );
00133             defaultDisplayed = 1;
00134         }
00135         else if( i == Pa_GetHostApiInfo( deviceInfo->hostApi )->defaultInputDevice )
00136         {
00137             const PaHostApiInfo *hostInfo = Pa_GetHostApiInfo( deviceInfo->hostApi );
00138             printf( "[ Default %s Input", hostInfo->name );
00139             defaultDisplayed = 1;
00140         }
00141         
00142         if( i == Pa_GetDefaultOutputDevice() )
00143         {
00144             printf( (defaultDisplayed ? "," : "[") );
00145             printf( " Default Output" );
00146             defaultDisplayed = 1;
00147         }
00148         else if( i == Pa_GetHostApiInfo( deviceInfo->hostApi )->defaultOutputDevice )
00149         {
00150             const PaHostApiInfo *hostInfo = Pa_GetHostApiInfo( deviceInfo->hostApi );
00151             printf( (defaultDisplayed ? "," : "[") );                
00152             printf( " Default %s Output", hostInfo->name );
00153             defaultDisplayed = 1;
00154         }
00155 
00156         if( defaultDisplayed )
00157             printf( " ]\n" );
00158 
00159     /* print device info fields */
00160         printf( "Name                        = %s\n", deviceInfo->name );
00161         printf( "Host API                    = %s\n",  Pa_GetHostApiInfo( deviceInfo->hostApi )->name );
00162         printf( "Max inputs = %d", deviceInfo->maxInputChannels  );
00163         printf( ", Max outputs = %d\n", deviceInfo->maxOutputChannels  );
00164 
00165         printf( "Default low input latency   = %8.4f\n", deviceInfo->defaultLowInputLatency  );
00166         printf( "Default low output latency  = %8.4f\n", deviceInfo->defaultLowOutputLatency  );
00167         printf( "Default high input latency  = %8.4f\n", deviceInfo->defaultHighInputLatency  );
00168         printf( "Default high output latency = %8.4f\n", deviceInfo->defaultHighOutputLatency  );
00169 
00170 #ifdef WIN32
00171 #if PA_USE_ASIO
00172 /* ASIO specific latency information */
00173         if( Pa_GetHostApiInfo( deviceInfo->hostApi )->type == paASIO ){
00174             long minLatency, maxLatency, preferredLatency, granularity;
00175 
00176             err = PaAsio_GetAvailableLatencyValues( i,
00177                             &minLatency, &maxLatency, &preferredLatency, &granularity );
00178 
00179             printf( "ASIO minimum buffer size    = %ld\n", minLatency  );
00180             printf( "ASIO maximum buffer size    = %ld\n", maxLatency  );
00181             printf( "ASIO preferred buffer size  = %ld\n", preferredLatency  );
00182 
00183             if( granularity == -1 )
00184                 printf( "ASIO buffer granularity     = power of 2\n" );
00185             else
00186                 printf( "ASIO buffer granularity     = %ld\n", granularity  );
00187         }
00188 #endif /* PA_USE_ASIO */
00189 #endif /* WIN32 */
00190 
00191         printf( "Default sample rate         = %8.2f\n", deviceInfo->defaultSampleRate );
00192 
00193     /* poll for standard sample rates */
00194         inputParameters.device = i;
00195         inputParameters.channelCount = deviceInfo->maxInputChannels;
00196         inputParameters.sampleFormat = paInt16;
00197         inputParameters.suggestedLatency = 0; /* ignored by Pa_IsFormatSupported() */
00198         inputParameters.hostApiSpecificStreamInfo = NULL;
00199         
00200         outputParameters.device = i;
00201         outputParameters.channelCount = deviceInfo->maxOutputChannels;
00202         outputParameters.sampleFormat = paInt16;
00203         outputParameters.suggestedLatency = 0; /* ignored by Pa_IsFormatSupported() */
00204         outputParameters.hostApiSpecificStreamInfo = NULL;
00205 
00206         if( inputParameters.channelCount > 0 )
00207         {
00208             printf("Supported standard sample rates\n for half-duplex 16 bit %d channel input = \n",
00209                     inputParameters.channelCount );
00210             PrintSupportedStandardSampleRates( &inputParameters, NULL );
00211         }
00212 
00213         if( outputParameters.channelCount > 0 )
00214         {
00215             printf("Supported standard sample rates\n for half-duplex 16 bit %d channel output = \n",
00216                     outputParameters.channelCount );
00217             PrintSupportedStandardSampleRates( NULL, &outputParameters );
00218         }
00219 
00220         if( inputParameters.channelCount > 0 && outputParameters.channelCount > 0 )
00221         {
00222             printf("Supported standard sample rates\n for full-duplex 16 bit %d channel input, %d channel output = \n",
00223                     inputParameters.channelCount, outputParameters.channelCount );
00224             PrintSupportedStandardSampleRates( &inputParameters, &outputParameters );
00225         }
00226     }
00227 
00228     Pa_Terminate();
00229 
00230     printf("----------------------------------------------\n");
00231     return 0;
00232 
00233 error:
00234     Pa_Terminate();
00235     fprintf( stderr, "An error occured while using the portaudio stream\n" );
00236     fprintf( stderr, "Error number: %d\n", err );
00237     fprintf( stderr, "Error message: %s\n", Pa_GetErrorText( err ) );
00238     return err;
00239 }