Chris@39: /** @file patest_multi_sine.c Chris@39: @ingroup test_src Chris@39: @brief Play a different sine wave on each channel. Chris@39: @author Phil Burk http://www.softsynth.com Chris@39: */ Chris@39: /* Chris@39: * $Id: patest_multi_sine.c 1368 2008-03-01 00:38:27Z rossb $ Chris@39: * Chris@39: * This program uses the PortAudio Portable Audio Library. Chris@39: * For more information see: http://www.portaudio.com Chris@39: * Copyright (c) 1999-2000 Ross Bencina and Phil Burk Chris@39: * Chris@39: * Permission is hereby granted, free of charge, to any person obtaining Chris@39: * a copy of this software and associated documentation files Chris@39: * (the "Software"), to deal in the Software without restriction, Chris@39: * including without limitation the rights to use, copy, modify, merge, Chris@39: * publish, distribute, sublicense, and/or sell copies of the Software, Chris@39: * and to permit persons to whom the Software is furnished to do so, Chris@39: * subject to the following conditions: Chris@39: * Chris@39: * The above copyright notice and this permission notice shall be Chris@39: * included in all copies or substantial portions of the Software. Chris@39: * Chris@39: * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, Chris@39: * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF Chris@39: * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. Chris@39: * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR Chris@39: * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF Chris@39: * CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION Chris@39: * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. Chris@39: */ Chris@39: Chris@39: /* Chris@39: * The text above constitutes the entire PortAudio license; however, Chris@39: * the PortAudio community also makes the following non-binding requests: Chris@39: * Chris@39: * Any person wishing to distribute modifications to the Software is Chris@39: * requested to send the modifications to the original developer so that Chris@39: * they can be incorporated into the canonical version. It is also Chris@39: * requested that these non-binding requests be included along with the Chris@39: * license above. Chris@39: */ Chris@39: Chris@39: #include Chris@39: #include Chris@39: Chris@39: #include "portaudio.h" Chris@39: Chris@39: #define SAMPLE_RATE (44100) Chris@39: #define FRAMES_PER_BUFFER (256) Chris@39: #define FREQ_INCR (300.0 / SAMPLE_RATE) Chris@39: #define MAX_CHANNELS (64) Chris@39: Chris@39: #ifndef M_PI Chris@39: #define M_PI (3.14159265) Chris@39: #endif Chris@39: Chris@39: typedef struct Chris@39: { Chris@39: short interleaved; /* Nonzero for interleaved / zero for non-interleaved. */ Chris@39: int numChannels; /* Actually used. */ Chris@39: double phases[MAX_CHANNELS]; /* Each channel gets its' own frequency. */ Chris@39: } Chris@39: paTestData; Chris@39: Chris@39: /* This routine will be called by the PortAudio engine when audio is needed. Chris@39: ** It may called at interrupt level on some machines so don't do anything Chris@39: ** that could mess up the system like calling malloc() or free(). Chris@39: */ Chris@39: static int patestCallback(const void* inputBuffer, Chris@39: void* outputBuffer, Chris@39: unsigned long framesPerBuffer, Chris@39: const PaStreamCallbackTimeInfo* timeInfo, Chris@39: PaStreamCallbackFlags statusFlags, Chris@39: void* userData) Chris@39: { Chris@39: int frameIndex, channelIndex; Chris@39: float** outputs = (float**)outputBuffer; Chris@39: paTestData* data = (paTestData*)userData; Chris@39: Chris@39: (void) inputBuffer; /* Prevent unused arg warning. */ Chris@39: if (data->interleaved) Chris@39: { Chris@39: float *out = (float*)outputBuffer; /* interleaved version */ Chris@39: for( frameIndex=0; frameIndex<(int)framesPerBuffer; frameIndex++ ) Chris@39: { Chris@39: for( channelIndex=0; channelIndexnumChannels; channelIndex++ ) Chris@39: { Chris@39: /* Output sine wave on every channel. */ Chris@39: *out++ = (float) sin(data->phases[channelIndex]); Chris@39: Chris@39: /* Play each channel at a higher frequency. */ Chris@39: data->phases[channelIndex] += FREQ_INCR * (4 + channelIndex); Chris@39: if( data->phases[channelIndex] >= (2.0 * M_PI) ) data->phases[channelIndex] -= (2.0 * M_PI); Chris@39: } Chris@39: } Chris@39: } Chris@39: else Chris@39: { Chris@39: for( frameIndex=0; frameIndex<(int)framesPerBuffer; frameIndex++ ) Chris@39: { Chris@39: for( channelIndex=0; channelIndexnumChannels; channelIndex++ ) Chris@39: { Chris@39: /* Output sine wave on every channel. */ Chris@39: outputs[channelIndex][frameIndex] = (float) sin(data->phases[channelIndex]); Chris@39: Chris@39: /* Play each channel at a higher frequency. */ Chris@39: data->phases[channelIndex] += FREQ_INCR * (4 + channelIndex); Chris@39: if( data->phases[channelIndex] >= (2.0 * M_PI) ) data->phases[channelIndex] -= (2.0 * M_PI); Chris@39: } Chris@39: } Chris@39: } Chris@39: return 0; Chris@39: } Chris@39: Chris@39: /*******************************************************************/ Chris@39: int test(short interleaved) Chris@39: { Chris@39: PaStream* stream; Chris@39: PaStreamParameters outputParameters; Chris@39: PaError err; Chris@39: const PaDeviceInfo* pdi; Chris@39: paTestData data; Chris@39: short n; Chris@39: Chris@39: outputParameters.device = Pa_GetDefaultOutputDevice(); /* Default output device, max channels. */ Chris@39: if (outputParameters.device == paNoDevice) { Chris@39: fprintf(stderr,"Error: No default output device.\n"); Chris@39: return paInvalidDevice; Chris@39: } Chris@39: pdi = Pa_GetDeviceInfo(outputParameters.device); Chris@39: outputParameters.channelCount = pdi->maxOutputChannels; Chris@39: if (outputParameters.channelCount > MAX_CHANNELS) Chris@39: outputParameters.channelCount = MAX_CHANNELS; Chris@39: outputParameters.sampleFormat = paFloat32; /* 32 bit floating point output */ Chris@39: outputParameters.suggestedLatency = pdi->defaultLowOutputLatency; Chris@39: outputParameters.hostApiSpecificStreamInfo = NULL; Chris@39: Chris@39: data.interleaved = interleaved; Chris@39: data.numChannels = outputParameters.channelCount; Chris@39: for (n = 0; n < data.numChannels; n++) Chris@39: data.phases[n] = 0.0; /* Phases wrap and maybe don't need initialisation. */ Chris@39: printf("%d ", data.numChannels); Chris@39: if (interleaved) Chris@39: printf("interleaved "); Chris@39: else Chris@39: { Chris@39: printf(" non-interleaved "); Chris@39: outputParameters.sampleFormat |= paNonInterleaved; Chris@39: } Chris@39: printf("channels.\n"); Chris@39: Chris@39: err = Pa_OpenStream(&stream, Chris@39: NULL, /* No input. */ Chris@39: &outputParameters, Chris@39: SAMPLE_RATE, /* Sample rate. */ Chris@39: FRAMES_PER_BUFFER, /* Frames per buffer. */ Chris@39: paClipOff, /* Samples never out of range, no clipping. */ Chris@39: patestCallback, Chris@39: &data); Chris@39: if (err == paNoError) Chris@39: { Chris@39: err = Pa_StartStream(stream); Chris@39: if (err == paNoError) Chris@39: { Chris@39: printf("Hit ENTER to stop this test.\n"); Chris@39: getchar(); Chris@39: err = Pa_StopStream(stream); Chris@39: } Chris@39: Pa_CloseStream( stream ); Chris@39: } Chris@39: return err; Chris@39: } Chris@39: Chris@39: Chris@39: /*******************************************************************/ Chris@39: int main(void) Chris@39: { Chris@39: PaError err; Chris@39: Chris@39: printf("PortAudio Test: output sine wave on each channel.\n" ); Chris@39: Chris@39: err = Pa_Initialize(); Chris@39: if (err != paNoError) Chris@39: goto done; Chris@39: Chris@39: err = test(1); /* 1 means interleaved. */ Chris@39: if (err != paNoError) Chris@39: goto done; Chris@39: Chris@39: err = test(0); /* 0 means not interleaved. */ Chris@39: if (err != paNoError) Chris@39: goto done; Chris@39: Chris@39: printf("Test finished.\n"); Chris@39: done: Chris@39: if (err) Chris@39: { Chris@39: fprintf(stderr, "An error occured while using the portaudio stream\n"); Chris@39: fprintf(stderr, "Error number: %d\n", err ); Chris@39: fprintf(stderr, "Error message: %s\n", Pa_GetErrorText(err)); Chris@39: } Chris@39: Pa_Terminate(); Chris@39: return 0; Chris@39: }