Chris@4: /** @file patest_multi_sine.c Chris@4: @ingroup test_src Chris@4: @brief Play a different sine wave on each channel. Chris@4: @author Phil Burk http://www.softsynth.com Chris@4: */ Chris@4: /* Chris@4: * $Id: patest_multi_sine.c 1368 2008-03-01 00:38:27Z rossb $ Chris@4: * Chris@4: * This program uses the PortAudio Portable Audio Library. Chris@4: * For more information see: http://www.portaudio.com Chris@4: * Copyright (c) 1999-2000 Ross Bencina and Phil Burk Chris@4: * Chris@4: * Permission is hereby granted, free of charge, to any person obtaining Chris@4: * a copy of this software and associated documentation files Chris@4: * (the "Software"), to deal in the Software without restriction, Chris@4: * including without limitation the rights to use, copy, modify, merge, Chris@4: * publish, distribute, sublicense, and/or sell copies of the Software, Chris@4: * and to permit persons to whom the Software is furnished to do so, Chris@4: * subject to the following conditions: Chris@4: * Chris@4: * The above copyright notice and this permission notice shall be Chris@4: * included in all copies or substantial portions of the Software. Chris@4: * Chris@4: * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, Chris@4: * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF Chris@4: * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. Chris@4: * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR Chris@4: * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF Chris@4: * CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION Chris@4: * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. Chris@4: */ Chris@4: Chris@4: /* Chris@4: * The text above constitutes the entire PortAudio license; however, Chris@4: * the PortAudio community also makes the following non-binding requests: Chris@4: * Chris@4: * Any person wishing to distribute modifications to the Software is Chris@4: * requested to send the modifications to the original developer so that Chris@4: * they can be incorporated into the canonical version. It is also Chris@4: * requested that these non-binding requests be included along with the Chris@4: * license above. Chris@4: */ Chris@4: Chris@4: #include Chris@4: #include Chris@4: Chris@4: #include "portaudio.h" Chris@4: Chris@4: #define SAMPLE_RATE (44100) Chris@4: #define FRAMES_PER_BUFFER (256) Chris@4: #define FREQ_INCR (300.0 / SAMPLE_RATE) Chris@4: #define MAX_CHANNELS (64) Chris@4: Chris@4: #ifndef M_PI Chris@4: #define M_PI (3.14159265) Chris@4: #endif Chris@4: Chris@4: typedef struct Chris@4: { Chris@4: short interleaved; /* Nonzero for interleaved / zero for non-interleaved. */ Chris@4: int numChannels; /* Actually used. */ Chris@4: double phases[MAX_CHANNELS]; /* Each channel gets its' own frequency. */ Chris@4: } Chris@4: paTestData; Chris@4: Chris@4: /* This routine will be called by the PortAudio engine when audio is needed. Chris@4: ** It may called at interrupt level on some machines so don't do anything Chris@4: ** that could mess up the system like calling malloc() or free(). Chris@4: */ Chris@4: static int patestCallback(const void* inputBuffer, Chris@4: void* outputBuffer, Chris@4: unsigned long framesPerBuffer, Chris@4: const PaStreamCallbackTimeInfo* timeInfo, Chris@4: PaStreamCallbackFlags statusFlags, Chris@4: void* userData) Chris@4: { Chris@4: int frameIndex, channelIndex; Chris@4: float** outputs = (float**)outputBuffer; Chris@4: paTestData* data = (paTestData*)userData; Chris@4: Chris@4: (void) inputBuffer; /* Prevent unused arg warning. */ Chris@4: if (data->interleaved) Chris@4: { Chris@4: float *out = (float*)outputBuffer; /* interleaved version */ Chris@4: for( frameIndex=0; frameIndex<(int)framesPerBuffer; frameIndex++ ) Chris@4: { Chris@4: for( channelIndex=0; channelIndexnumChannels; channelIndex++ ) Chris@4: { Chris@4: /* Output sine wave on every channel. */ Chris@4: *out++ = (float) sin(data->phases[channelIndex]); Chris@4: Chris@4: /* Play each channel at a higher frequency. */ Chris@4: data->phases[channelIndex] += FREQ_INCR * (4 + channelIndex); Chris@4: if( data->phases[channelIndex] >= (2.0 * M_PI) ) data->phases[channelIndex] -= (2.0 * M_PI); Chris@4: } Chris@4: } Chris@4: } Chris@4: else Chris@4: { Chris@4: for( frameIndex=0; frameIndex<(int)framesPerBuffer; frameIndex++ ) Chris@4: { Chris@4: for( channelIndex=0; channelIndexnumChannels; channelIndex++ ) Chris@4: { Chris@4: /* Output sine wave on every channel. */ Chris@4: outputs[channelIndex][frameIndex] = (float) sin(data->phases[channelIndex]); Chris@4: Chris@4: /* Play each channel at a higher frequency. */ Chris@4: data->phases[channelIndex] += FREQ_INCR * (4 + channelIndex); Chris@4: if( data->phases[channelIndex] >= (2.0 * M_PI) ) data->phases[channelIndex] -= (2.0 * M_PI); Chris@4: } Chris@4: } Chris@4: } Chris@4: return 0; Chris@4: } Chris@4: Chris@4: /*******************************************************************/ Chris@4: int test(short interleaved) Chris@4: { Chris@4: PaStream* stream; Chris@4: PaStreamParameters outputParameters; Chris@4: PaError err; Chris@4: const PaDeviceInfo* pdi; Chris@4: paTestData data; Chris@4: short n; Chris@4: Chris@4: outputParameters.device = Pa_GetDefaultOutputDevice(); /* Default output device, max channels. */ Chris@4: if (outputParameters.device == paNoDevice) { Chris@4: fprintf(stderr,"Error: No default output device.\n"); Chris@4: return paInvalidDevice; Chris@4: } Chris@4: pdi = Pa_GetDeviceInfo(outputParameters.device); Chris@4: outputParameters.channelCount = pdi->maxOutputChannels; Chris@4: if (outputParameters.channelCount > MAX_CHANNELS) Chris@4: outputParameters.channelCount = MAX_CHANNELS; Chris@4: outputParameters.sampleFormat = paFloat32; /* 32 bit floating point output */ Chris@4: outputParameters.suggestedLatency = pdi->defaultLowOutputLatency; Chris@4: outputParameters.hostApiSpecificStreamInfo = NULL; Chris@4: Chris@4: data.interleaved = interleaved; Chris@4: data.numChannels = outputParameters.channelCount; Chris@4: for (n = 0; n < data.numChannels; n++) Chris@4: data.phases[n] = 0.0; /* Phases wrap and maybe don't need initialisation. */ Chris@4: printf("%d ", data.numChannels); Chris@4: if (interleaved) Chris@4: printf("interleaved "); Chris@4: else Chris@4: { Chris@4: printf(" non-interleaved "); Chris@4: outputParameters.sampleFormat |= paNonInterleaved; Chris@4: } Chris@4: printf("channels.\n"); Chris@4: Chris@4: err = Pa_OpenStream(&stream, Chris@4: NULL, /* No input. */ Chris@4: &outputParameters, Chris@4: SAMPLE_RATE, /* Sample rate. */ Chris@4: FRAMES_PER_BUFFER, /* Frames per buffer. */ Chris@4: paClipOff, /* Samples never out of range, no clipping. */ Chris@4: patestCallback, Chris@4: &data); Chris@4: if (err == paNoError) Chris@4: { Chris@4: err = Pa_StartStream(stream); Chris@4: if (err == paNoError) Chris@4: { Chris@4: printf("Hit ENTER to stop this test.\n"); Chris@4: getchar(); Chris@4: err = Pa_StopStream(stream); Chris@4: } Chris@4: Pa_CloseStream( stream ); Chris@4: } Chris@4: return err; Chris@4: } Chris@4: Chris@4: Chris@4: /*******************************************************************/ Chris@4: int main(void) Chris@4: { Chris@4: PaError err; Chris@4: Chris@4: printf("PortAudio Test: output sine wave on each channel.\n" ); Chris@4: Chris@4: err = Pa_Initialize(); Chris@4: if (err != paNoError) Chris@4: goto done; Chris@4: Chris@4: err = test(1); /* 1 means interleaved. */ Chris@4: if (err != paNoError) Chris@4: goto done; Chris@4: Chris@4: err = test(0); /* 0 means not interleaved. */ Chris@4: if (err != paNoError) Chris@4: goto done; Chris@4: Chris@4: printf("Test finished.\n"); Chris@4: done: Chris@4: if (err) Chris@4: { Chris@4: fprintf(stderr, "An error occured while using the portaudio stream\n"); Chris@4: fprintf(stderr, "Error number: %d\n", err ); Chris@4: fprintf(stderr, "Error message: %s\n", Pa_GetErrorText(err)); Chris@4: } Chris@4: Pa_Terminate(); Chris@4: return 0; Chris@4: }