diff options
Diffstat (limited to 'portaudio/test/patest_mono_asio_channel_select.c')
| -rw-r--r-- | portaudio/test/patest_mono_asio_channel_select.c | 166 |
1 files changed, 166 insertions, 0 deletions
diff --git a/portaudio/test/patest_mono_asio_channel_select.c b/portaudio/test/patest_mono_asio_channel_select.c new file mode 100644 index 0000000..3baeaac --- /dev/null +++ b/portaudio/test/patest_mono_asio_channel_select.c @@ -0,0 +1,166 @@ +/** @file pa_test_mono_asio_channel_select.c + @ingroup test_src + @brief Play a monophonic sine wave on a specific ASIO channel. + @author Ross Bencina <rossb@audiomulch.com> + @author Phil Burk <philburk@softsynth.com> +*/ +/* + * $Id: patest_mono_asio_channel_select.c 1097 2006-08-26 08:27:53Z rossb $ + * + * Authors: + * Ross Bencina <rossb@audiomulch.com> + * Phil Burk <philburk@softsynth.com> + * + * 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" +#include "pa_asio.h" + +#define NUM_SECONDS (10) +#define SAMPLE_RATE (44100) +#define AMPLITUDE (0.8) +#define FRAMES_PER_BUFFER (64) +#define OUTPUT_DEVICE Pa_GetDefaultOutputDevice() + +#ifndef M_PI +#define M_PI (3.14159265) +#endif + +#define TABLE_SIZE (200) +typedef struct +{ + float sine[TABLE_SIZE]; + int phase; +} +paTestData; + +/* This routine will be called by the PortAudio engine when audio is needed. +** It may called at interrupt level on some machines so don't do anything +** that could mess up the system like calling malloc() or free(). +*/ +static int patestCallback( const void *inputBuffer, void *outputBuffer, + unsigned long framesPerBuffer, + const PaStreamCallbackTimeInfo* timeInfo, + PaStreamCallbackFlags statusFlags, + void *userData ) +{ + paTestData *data = (paTestData*)userData; + float *out = (float*)outputBuffer; + unsigned long i; + int finished = 0; + /* avoid unused variable warnings */ + (void) inputBuffer; + (void) timeInfo; + (void) statusFlags; + for( i=0; i<framesPerBuffer; i++ ) + { + *out++ = data->sine[data->phase]; /* left */ + data->phase += 1; + if( data->phase >= TABLE_SIZE ) data->phase -= TABLE_SIZE; + } + return finished; +} + +/*******************************************************************/ +int main(void); +int main(void) +{ + PaStreamParameters outputParameters; + PaAsioStreamInfo asioOutputInfo; + PaStream *stream; + PaError err; + paTestData data; + int outputChannelSelectors[1]; + int i; + printf("PortAudio Test: output MONO sine wave. SR = %d, BufSize = %d\n", SAMPLE_RATE, FRAMES_PER_BUFFER); + /* initialise sinusoidal wavetable */ + for( i=0; i<TABLE_SIZE; i++ ) + { + data.sine[i] = (float) (AMPLITUDE * sin( ((double)i/(double)TABLE_SIZE) * M_PI * 2. )); + } + data.phase = 0; + + err = Pa_Initialize(); + if( err != paNoError ) goto error; + + outputParameters.device = OUTPUT_DEVICE; + outputParameters.channelCount = 1; /* MONO output */ + outputParameters.sampleFormat = paFloat32; /* 32 bit floating point output */ + outputParameters.suggestedLatency = Pa_GetDeviceInfo( outputParameters.device )->defaultLowOutputLatency; + + asioOutputInfo.size = sizeof(PaAsioStreamInfo); + asioOutputInfo.hostApiType = paASIO; + asioOutputInfo.version = 1; + asioOutputInfo.flags = paAsioUseChannelSelectors; + outputChannelSelectors[0] = 1; /* select the second (right) ASIO device channel */ + asioOutputInfo.channelSelectors = outputChannelSelectors; + outputParameters.hostApiSpecificStreamInfo = &asioOutputInfo; + + err = Pa_OpenStream( + &stream, + NULL, /* no input */ + &outputParameters, + SAMPLE_RATE, + FRAMES_PER_BUFFER, + paClipOff, /* we won't output out of range samples so don't bother clipping them */ + patestCallback, + &data ); + if( err != paNoError ) goto error; + + err = Pa_StartStream( stream ); + if( err != paNoError ) goto error; + + printf("Play for %d seconds.\n", NUM_SECONDS ); fflush(stdout); + Pa_Sleep( NUM_SECONDS * 1000 ); + + err = Pa_StopStream( stream ); + if( err != paNoError ) goto error; + + err = Pa_CloseStream( stream ); + if( err != paNoError ) goto error; + + Pa_Terminate(); + printf("Test finished.\n"); + return err; +error: + Pa_Terminate(); + fprintf( stderr, "An error occured while using the portaudio stream\n" ); + fprintf( stderr, "Error number: %d\n", err ); + fprintf( stderr, "Error message: %s\n", Pa_GetErrorText( err ) ); + return err; +} |