cannam@89: /** @file patest_two_rates.c cannam@89: @ingroup test_src cannam@89: @brief Play two streams at different rates to make sure they don't interfere. cannam@89: @author Phil Burk cannam@89: */ cannam@89: /* cannam@89: * $Id: patest_two_rates.c 1640 2011-03-07 00:52:47Z philburk $ cannam@89: * cannam@89: * Author: Phil Burk http://www.softsynth.com cannam@89: * cannam@89: * This program uses the PortAudio Portable Audio Library. cannam@89: * For more information see: http://www.portaudio.com cannam@89: * Copyright (c) 1999-2000 Ross Bencina and Phil Burk cannam@89: * cannam@89: * Permission is hereby granted, free of charge, to any person obtaining cannam@89: * a copy of this software and associated documentation files cannam@89: * (the "Software"), to deal in the Software without restriction, cannam@89: * including without limitation the rights to use, copy, modify, merge, cannam@89: * publish, distribute, sublicense, and/or sell copies of the Software, cannam@89: * and to permit persons to whom the Software is furnished to do so, cannam@89: * subject to the following conditions: cannam@89: * cannam@89: * The above copyright notice and this permission notice shall be cannam@89: * included in all copies or substantial portions of the Software. cannam@89: * cannam@89: * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, cannam@89: * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF cannam@89: * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. cannam@89: * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR cannam@89: * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF cannam@89: * CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION cannam@89: * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. cannam@89: */ cannam@89: cannam@89: /* cannam@89: * The text above constitutes the entire PortAudio license; however, cannam@89: * the PortAudio community also makes the following non-binding requests: cannam@89: * cannam@89: * Any person wishing to distribute modifications to the Software is cannam@89: * requested to send the modifications to the original developer so that cannam@89: * they can be incorporated into the canonical version. It is also cannam@89: * requested that these non-binding requests be included along with the cannam@89: * license above. cannam@89: */ cannam@89: cannam@89: #include cannam@89: #include cannam@89: #include "portaudio.h" cannam@89: cannam@89: #define OUTPUT_DEVICE (Pa_GetDefaultOutputDeviceID()) cannam@89: #define SAMPLE_RATE_1 (44100) cannam@89: #define SAMPLE_RATE_2 (48000) cannam@89: #define FRAMES_PER_BUFFER (256) cannam@89: #define FREQ_INCR (0.1) cannam@89: cannam@89: #ifndef M_PI cannam@89: #define M_PI (3.14159265) cannam@89: #endif cannam@89: cannam@89: typedef struct cannam@89: { cannam@89: double phase; cannam@89: int numFrames; cannam@89: } paTestData; cannam@89: cannam@89: /* This routine will be called by the PortAudio engine when audio is needed. cannam@89: ** It may called at interrupt level on some machines so don't do anything cannam@89: ** that could mess up the system like calling malloc() or free(). cannam@89: */ cannam@89: static int patestCallback( const void *inputBuffer, void *outputBuffer, cannam@89: unsigned long framesPerBuffer, cannam@89: const PaStreamCallbackTimeInfo* timeInfo, cannam@89: PaStreamCallbackFlags statusFlags, cannam@89: void *userData ) cannam@89: { cannam@89: paTestData *data = (paTestData*)userData; cannam@89: float *out = (float*)outputBuffer; cannam@89: int frameIndex; cannam@89: (void) timeInfo; /* Prevent unused variable warnings. */ cannam@89: (void) inputBuffer; cannam@89: cannam@89: for( frameIndex=0; frameIndex<(int)framesPerBuffer; frameIndex++ ) cannam@89: { cannam@89: /* Generate sine wave. */ cannam@89: float value = (float) 0.3 * sin(data->phase); cannam@89: /* Stereo - two channels. */ cannam@89: *out++ = value; cannam@89: *out++ = value; cannam@89: cannam@89: data->phase += FREQ_INCR; cannam@89: if( data->phase >= (2.0 * M_PI) ) data->phase -= (2.0 * M_PI); cannam@89: } cannam@89: data->numFrames += 1; cannam@89: return 0; cannam@89: } cannam@89: cannam@89: /*******************************************************************/ cannam@89: int main(void); cannam@89: int main(void) cannam@89: { cannam@89: PaError err; cannam@89: PaStreamParameters outputParameters; cannam@89: PaStream *stream1; cannam@89: PaStream *stream2; cannam@89: paTestData data1 = {0}; cannam@89: paTestData data2 = {0}; cannam@89: printf("PortAudio Test: two rates.\n" ); cannam@89: cannam@89: err = Pa_Initialize(); cannam@89: if( err != paNoError ) goto error; cannam@89: cannam@89: outputParameters.device = Pa_GetDefaultOutputDevice(); /* default output device */ cannam@89: if (outputParameters.device == paNoDevice) { cannam@89: fprintf(stderr,"Error: No default output device.\n"); cannam@89: goto error; cannam@89: } cannam@89: outputParameters.channelCount = 2; /* stereo output */ cannam@89: outputParameters.sampleFormat = paFloat32; /* 32 bit floating point output */ cannam@89: outputParameters.suggestedLatency = Pa_GetDeviceInfo( outputParameters.device )->defaultLowOutputLatency; cannam@89: outputParameters.hostApiSpecificStreamInfo = NULL; cannam@89: cannam@89: /* Start first stream. **********************/ cannam@89: err = Pa_OpenStream( cannam@89: &stream1, cannam@89: NULL, /* no input */ cannam@89: &outputParameters, cannam@89: SAMPLE_RATE_1, cannam@89: FRAMES_PER_BUFFER, cannam@89: paClipOff, /* we won't output out of range samples so don't bother clipping them */ cannam@89: patestCallback, cannam@89: &data1 ); cannam@89: if( err != paNoError ) goto error; cannam@89: cannam@89: err = Pa_StartStream( stream1 ); cannam@89: if( err != paNoError ) goto error; cannam@89: cannam@89: Pa_Sleep( 3 * 1000 ); cannam@89: cannam@89: /* Start second stream. **********************/ cannam@89: err = Pa_OpenStream( cannam@89: &stream2, cannam@89: NULL, /* no input */ cannam@89: &outputParameters, cannam@89: SAMPLE_RATE_2, cannam@89: FRAMES_PER_BUFFER, cannam@89: paClipOff, /* we won't output out of range samples so don't bother clipping them */ cannam@89: patestCallback, cannam@89: &data2 ); cannam@89: if( err != paNoError ) goto error; cannam@89: cannam@89: err = Pa_StartStream( stream2 ); cannam@89: if( err != paNoError ) goto error; cannam@89: cannam@89: Pa_Sleep( 3 * 1000 ); cannam@89: cannam@89: err = Pa_StopStream( stream2 ); cannam@89: if( err != paNoError ) goto error; cannam@89: cannam@89: Pa_Sleep( 3 * 1000 ); cannam@89: cannam@89: err = Pa_StopStream( stream1 ); cannam@89: if( err != paNoError ) goto error; cannam@89: cannam@89: Pa_CloseStream( stream2 ); cannam@89: Pa_CloseStream( stream1 ); cannam@89: cannam@89: Pa_Terminate(); cannam@89: cannam@89: printf("NumFrames = %d on stream1, %d on stream2.\n", data1.numFrames, data2.numFrames ); cannam@89: printf("Test finished.\n"); cannam@89: return err; cannam@89: error: cannam@89: Pa_Terminate(); cannam@89: fprintf( stderr, "An error occured while using the portaudio stream\n" ); cannam@89: fprintf( stderr, "Error number: %d\n", err ); cannam@89: fprintf( stderr, "Error message: %s\n", Pa_GetErrorText( err ) ); cannam@89: return err; cannam@89: }