cannam@124: /** @file patest_two_rates.c cannam@124: @ingroup test_src cannam@124: @brief Play two streams at different rates to make sure they don't interfere. cannam@124: @author Phil Burk cannam@124: */ cannam@124: /* cannam@124: * $Id: patest_two_rates.c 1640 2011-03-07 00:52:47Z philburk $ cannam@124: * cannam@124: * Author: Phil Burk http://www.softsynth.com cannam@124: * cannam@124: * This program uses the PortAudio Portable Audio Library. cannam@124: * For more information see: http://www.portaudio.com cannam@124: * Copyright (c) 1999-2000 Ross Bencina and Phil Burk cannam@124: * cannam@124: * Permission is hereby granted, free of charge, to any person obtaining cannam@124: * a copy of this software and associated documentation files cannam@124: * (the "Software"), to deal in the Software without restriction, cannam@124: * including without limitation the rights to use, copy, modify, merge, cannam@124: * publish, distribute, sublicense, and/or sell copies of the Software, cannam@124: * and to permit persons to whom the Software is furnished to do so, cannam@124: * subject to the following conditions: cannam@124: * cannam@124: * The above copyright notice and this permission notice shall be cannam@124: * included in all copies or substantial portions of the Software. cannam@124: * cannam@124: * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, cannam@124: * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF cannam@124: * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. cannam@124: * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR cannam@124: * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF cannam@124: * CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION cannam@124: * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. cannam@124: */ cannam@124: cannam@124: /* cannam@124: * The text above constitutes the entire PortAudio license; however, cannam@124: * the PortAudio community also makes the following non-binding requests: cannam@124: * cannam@124: * Any person wishing to distribute modifications to the Software is cannam@124: * requested to send the modifications to the original developer so that cannam@124: * they can be incorporated into the canonical version. It is also cannam@124: * requested that these non-binding requests be included along with the cannam@124: * license above. cannam@124: */ cannam@124: cannam@124: #include cannam@124: #include cannam@124: #include "portaudio.h" cannam@124: cannam@124: #define OUTPUT_DEVICE (Pa_GetDefaultOutputDeviceID()) cannam@124: #define SAMPLE_RATE_1 (44100) cannam@124: #define SAMPLE_RATE_2 (48000) cannam@124: #define FRAMES_PER_BUFFER (256) cannam@124: #define FREQ_INCR (0.1) cannam@124: cannam@124: #ifndef M_PI cannam@124: #define M_PI (3.14159265) cannam@124: #endif cannam@124: cannam@124: typedef struct cannam@124: { cannam@124: double phase; cannam@124: int numFrames; cannam@124: } paTestData; cannam@124: cannam@124: /* This routine will be called by the PortAudio engine when audio is needed. cannam@124: ** It may called at interrupt level on some machines so don't do anything cannam@124: ** that could mess up the system like calling malloc() or free(). cannam@124: */ cannam@124: static int patestCallback( const void *inputBuffer, void *outputBuffer, cannam@124: unsigned long framesPerBuffer, cannam@124: const PaStreamCallbackTimeInfo* timeInfo, cannam@124: PaStreamCallbackFlags statusFlags, cannam@124: void *userData ) cannam@124: { cannam@124: paTestData *data = (paTestData*)userData; cannam@124: float *out = (float*)outputBuffer; cannam@124: int frameIndex; cannam@124: (void) timeInfo; /* Prevent unused variable warnings. */ cannam@124: (void) inputBuffer; cannam@124: cannam@124: for( frameIndex=0; frameIndex<(int)framesPerBuffer; frameIndex++ ) cannam@124: { cannam@124: /* Generate sine wave. */ cannam@124: float value = (float) 0.3 * sin(data->phase); cannam@124: /* Stereo - two channels. */ cannam@124: *out++ = value; cannam@124: *out++ = value; cannam@124: cannam@124: data->phase += FREQ_INCR; cannam@124: if( data->phase >= (2.0 * M_PI) ) data->phase -= (2.0 * M_PI); cannam@124: } cannam@124: data->numFrames += 1; cannam@124: return 0; cannam@124: } cannam@124: cannam@124: /*******************************************************************/ cannam@124: int main(void); cannam@124: int main(void) cannam@124: { cannam@124: PaError err; cannam@124: PaStreamParameters outputParameters; cannam@124: PaStream *stream1; cannam@124: PaStream *stream2; cannam@124: paTestData data1 = {0}; cannam@124: paTestData data2 = {0}; cannam@124: printf("PortAudio Test: two rates.\n" ); cannam@124: cannam@124: err = Pa_Initialize(); cannam@124: if( err != paNoError ) goto error; cannam@124: cannam@124: outputParameters.device = Pa_GetDefaultOutputDevice(); /* default output device */ cannam@124: if (outputParameters.device == paNoDevice) { cannam@124: fprintf(stderr,"Error: No default output device.\n"); cannam@124: goto error; cannam@124: } cannam@124: outputParameters.channelCount = 2; /* stereo output */ cannam@124: outputParameters.sampleFormat = paFloat32; /* 32 bit floating point output */ cannam@124: outputParameters.suggestedLatency = Pa_GetDeviceInfo( outputParameters.device )->defaultLowOutputLatency; cannam@124: outputParameters.hostApiSpecificStreamInfo = NULL; cannam@124: cannam@124: /* Start first stream. **********************/ cannam@124: err = Pa_OpenStream( cannam@124: &stream1, cannam@124: NULL, /* no input */ cannam@124: &outputParameters, cannam@124: SAMPLE_RATE_1, cannam@124: FRAMES_PER_BUFFER, cannam@124: paClipOff, /* we won't output out of range samples so don't bother clipping them */ cannam@124: patestCallback, cannam@124: &data1 ); cannam@124: if( err != paNoError ) goto error; cannam@124: cannam@124: err = Pa_StartStream( stream1 ); cannam@124: if( err != paNoError ) goto error; cannam@124: cannam@124: Pa_Sleep( 3 * 1000 ); cannam@124: cannam@124: /* Start second stream. **********************/ cannam@124: err = Pa_OpenStream( cannam@124: &stream2, cannam@124: NULL, /* no input */ cannam@124: &outputParameters, cannam@124: SAMPLE_RATE_2, cannam@124: FRAMES_PER_BUFFER, cannam@124: paClipOff, /* we won't output out of range samples so don't bother clipping them */ cannam@124: patestCallback, cannam@124: &data2 ); cannam@124: if( err != paNoError ) goto error; cannam@124: cannam@124: err = Pa_StartStream( stream2 ); cannam@124: if( err != paNoError ) goto error; cannam@124: cannam@124: Pa_Sleep( 3 * 1000 ); cannam@124: cannam@124: err = Pa_StopStream( stream2 ); cannam@124: if( err != paNoError ) goto error; cannam@124: cannam@124: Pa_Sleep( 3 * 1000 ); cannam@124: cannam@124: err = Pa_StopStream( stream1 ); cannam@124: if( err != paNoError ) goto error; cannam@124: cannam@124: Pa_CloseStream( stream2 ); cannam@124: Pa_CloseStream( stream1 ); cannam@124: cannam@124: Pa_Terminate(); cannam@124: cannam@124: printf("NumFrames = %d on stream1, %d on stream2.\n", data1.numFrames, data2.numFrames ); cannam@124: printf("Test finished.\n"); cannam@124: return err; cannam@124: error: cannam@124: Pa_Terminate(); cannam@124: fprintf( stderr, "An error occured while using the portaudio stream\n" ); cannam@124: fprintf( stderr, "Error number: %d\n", err ); cannam@124: fprintf( stderr, "Error message: %s\n", Pa_GetErrorText( err ) ); cannam@124: return err; cannam@124: }