pa_devs.c 9.18 KB
Newer Older
1 2 3 4 5 6 7 8 9
/** @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.
*/
/*
10
 * $Id$
11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115
 *
 * 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;
    }
116 117 118
    
    printf( "PortAudio version: 0x%08X\n", Pa_GetVersion());
    printf( "Version text: '%s'\n", Pa_GetVersionInfo()->versionText );
119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252

    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;
}