cannam@124: /** @file patest_multi_sine.c cannam@124: @ingroup test_src cannam@124: @brief Play a different sine wave on each channel. cannam@124: @author Phil Burk http://www.softsynth.com cannam@124: */ cannam@124: /* cannam@124: * $Id: patest_multi_sine.c 1368 2008-03-01 00:38:27Z rossb $ 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: cannam@124: #include "portaudio.h" cannam@124: cannam@124: #define SAMPLE_RATE (44100) cannam@124: #define FRAMES_PER_BUFFER (256) cannam@124: #define FREQ_INCR (300.0 / SAMPLE_RATE) cannam@124: #define MAX_CHANNELS (64) 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: short interleaved; /* Nonzero for interleaved / zero for non-interleaved. */ cannam@124: int numChannels; /* Actually used. */ cannam@124: double phases[MAX_CHANNELS]; /* Each channel gets its' own frequency. */ cannam@124: } 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, cannam@124: void* outputBuffer, cannam@124: unsigned long framesPerBuffer, cannam@124: const PaStreamCallbackTimeInfo* timeInfo, cannam@124: PaStreamCallbackFlags statusFlags, cannam@124: void* userData) cannam@124: { cannam@124: int frameIndex, channelIndex; cannam@124: float** outputs = (float**)outputBuffer; cannam@124: paTestData* data = (paTestData*)userData; cannam@124: cannam@124: (void) inputBuffer; /* Prevent unused arg warning. */ cannam@124: if (data->interleaved) cannam@124: { cannam@124: float *out = (float*)outputBuffer; /* interleaved version */ cannam@124: for( frameIndex=0; frameIndex<(int)framesPerBuffer; frameIndex++ ) cannam@124: { cannam@124: for( channelIndex=0; channelIndexnumChannels; channelIndex++ ) cannam@124: { cannam@124: /* Output sine wave on every channel. */ cannam@124: *out++ = (float) sin(data->phases[channelIndex]); cannam@124: cannam@124: /* Play each channel at a higher frequency. */ cannam@124: data->phases[channelIndex] += FREQ_INCR * (4 + channelIndex); cannam@124: if( data->phases[channelIndex] >= (2.0 * M_PI) ) data->phases[channelIndex] -= (2.0 * M_PI); cannam@124: } cannam@124: } cannam@124: } cannam@124: else cannam@124: { cannam@124: for( frameIndex=0; frameIndex<(int)framesPerBuffer; frameIndex++ ) cannam@124: { cannam@124: for( channelIndex=0; channelIndexnumChannels; channelIndex++ ) cannam@124: { cannam@124: /* Output sine wave on every channel. */ cannam@124: outputs[channelIndex][frameIndex] = (float) sin(data->phases[channelIndex]); cannam@124: cannam@124: /* Play each channel at a higher frequency. */ cannam@124: data->phases[channelIndex] += FREQ_INCR * (4 + channelIndex); cannam@124: if( data->phases[channelIndex] >= (2.0 * M_PI) ) data->phases[channelIndex] -= (2.0 * M_PI); cannam@124: } cannam@124: } cannam@124: } cannam@124: return 0; cannam@124: } cannam@124: cannam@124: /*******************************************************************/ cannam@124: int test(short interleaved) cannam@124: { cannam@124: PaStream* stream; cannam@124: PaStreamParameters outputParameters; cannam@124: PaError err; cannam@124: const PaDeviceInfo* pdi; cannam@124: paTestData data; cannam@124: short n; cannam@124: cannam@124: outputParameters.device = Pa_GetDefaultOutputDevice(); /* Default output device, max channels. */ cannam@124: if (outputParameters.device == paNoDevice) { cannam@124: fprintf(stderr,"Error: No default output device.\n"); cannam@124: return paInvalidDevice; cannam@124: } cannam@124: pdi = Pa_GetDeviceInfo(outputParameters.device); cannam@124: outputParameters.channelCount = pdi->maxOutputChannels; cannam@124: if (outputParameters.channelCount > MAX_CHANNELS) cannam@124: outputParameters.channelCount = MAX_CHANNELS; cannam@124: outputParameters.sampleFormat = paFloat32; /* 32 bit floating point output */ cannam@124: outputParameters.suggestedLatency = pdi->defaultLowOutputLatency; cannam@124: outputParameters.hostApiSpecificStreamInfo = NULL; cannam@124: cannam@124: data.interleaved = interleaved; cannam@124: data.numChannels = outputParameters.channelCount; cannam@124: for (n = 0; n < data.numChannels; n++) cannam@124: data.phases[n] = 0.0; /* Phases wrap and maybe don't need initialisation. */ cannam@124: printf("%d ", data.numChannels); cannam@124: if (interleaved) cannam@124: printf("interleaved "); cannam@124: else cannam@124: { cannam@124: printf(" non-interleaved "); cannam@124: outputParameters.sampleFormat |= paNonInterleaved; cannam@124: } cannam@124: printf("channels.\n"); cannam@124: cannam@124: err = Pa_OpenStream(&stream, cannam@124: NULL, /* No input. */ cannam@124: &outputParameters, cannam@124: SAMPLE_RATE, /* Sample rate. */ cannam@124: FRAMES_PER_BUFFER, /* Frames per buffer. */ cannam@124: paClipOff, /* Samples never out of range, no clipping. */ cannam@124: patestCallback, cannam@124: &data); cannam@124: if (err == paNoError) cannam@124: { cannam@124: err = Pa_StartStream(stream); cannam@124: if (err == paNoError) cannam@124: { cannam@124: printf("Hit ENTER to stop this test.\n"); cannam@124: getchar(); cannam@124: err = Pa_StopStream(stream); cannam@124: } cannam@124: Pa_CloseStream( stream ); cannam@124: } cannam@124: return err; cannam@124: } cannam@124: cannam@124: cannam@124: /*******************************************************************/ cannam@124: int main(void) cannam@124: { cannam@124: PaError err; cannam@124: cannam@124: printf("PortAudio Test: output sine wave on each channel.\n" ); cannam@124: cannam@124: err = Pa_Initialize(); cannam@124: if (err != paNoError) cannam@124: goto done; cannam@124: cannam@124: err = test(1); /* 1 means interleaved. */ cannam@124: if (err != paNoError) cannam@124: goto done; cannam@124: cannam@124: err = test(0); /* 0 means not interleaved. */ cannam@124: if (err != paNoError) cannam@124: goto done; cannam@124: cannam@124: printf("Test finished.\n"); cannam@124: done: cannam@124: if (err) cannam@124: { 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: } cannam@124: Pa_Terminate(); cannam@124: return 0; cannam@124: }