cannam@162: /** @file patest_multi_sine.c cannam@162: @ingroup test_src cannam@162: @brief Play a different sine wave on each channel. cannam@162: @author Phil Burk http://www.softsynth.com cannam@162: */ cannam@162: /* cannam@162: * $Id$ cannam@162: * cannam@162: * This program uses the PortAudio Portable Audio Library. cannam@162: * For more information see: http://www.portaudio.com cannam@162: * Copyright (c) 1999-2000 Ross Bencina and Phil Burk cannam@162: * cannam@162: * Permission is hereby granted, free of charge, to any person obtaining cannam@162: * a copy of this software and associated documentation files cannam@162: * (the "Software"), to deal in the Software without restriction, cannam@162: * including without limitation the rights to use, copy, modify, merge, cannam@162: * publish, distribute, sublicense, and/or sell copies of the Software, cannam@162: * and to permit persons to whom the Software is furnished to do so, cannam@162: * subject to the following conditions: cannam@162: * cannam@162: * The above copyright notice and this permission notice shall be cannam@162: * included in all copies or substantial portions of the Software. cannam@162: * cannam@162: * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, cannam@162: * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF cannam@162: * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. cannam@162: * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR cannam@162: * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF cannam@162: * CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION cannam@162: * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. cannam@162: */ cannam@162: cannam@162: /* cannam@162: * The text above constitutes the entire PortAudio license; however, cannam@162: * the PortAudio community also makes the following non-binding requests: cannam@162: * cannam@162: * Any person wishing to distribute modifications to the Software is cannam@162: * requested to send the modifications to the original developer so that cannam@162: * they can be incorporated into the canonical version. It is also cannam@162: * requested that these non-binding requests be included along with the cannam@162: * license above. cannam@162: */ cannam@162: cannam@162: #include cannam@162: #include cannam@162: cannam@162: #include "portaudio.h" cannam@162: cannam@162: #define SAMPLE_RATE (44100) cannam@162: #define FRAMES_PER_BUFFER (128) cannam@162: #define FREQ_INCR (300.0 / SAMPLE_RATE) cannam@162: #define MAX_CHANNELS (64) cannam@162: cannam@162: #ifndef M_PI cannam@162: #define M_PI (3.14159265) cannam@162: #endif cannam@162: cannam@162: typedef struct cannam@162: { cannam@162: short interleaved; /* Nonzero for interleaved / zero for non-interleaved. */ cannam@162: int numChannels; /* Actually used. */ cannam@162: double phases[MAX_CHANNELS]; /* Each channel gets its' own frequency. */ cannam@162: } cannam@162: paTestData; cannam@162: cannam@162: /* This routine will be called by the PortAudio engine when audio is needed. cannam@162: ** It may called at interrupt level on some machines so don't do anything cannam@162: ** that could mess up the system like calling malloc() or free(). cannam@162: */ cannam@162: static int patestCallback(const void* inputBuffer, cannam@162: void* outputBuffer, cannam@162: unsigned long framesPerBuffer, cannam@162: const PaStreamCallbackTimeInfo* timeInfo, cannam@162: PaStreamCallbackFlags statusFlags, cannam@162: void* userData) cannam@162: { cannam@162: int frameIndex, channelIndex; cannam@162: float** outputs = (float**)outputBuffer; cannam@162: paTestData* data = (paTestData*)userData; cannam@162: cannam@162: (void) inputBuffer; /* Prevent unused arg warning. */ cannam@162: if (data->interleaved) cannam@162: { cannam@162: float *out = (float*)outputBuffer; /* interleaved version */ cannam@162: for( frameIndex=0; frameIndex<(int)framesPerBuffer; frameIndex++ ) cannam@162: { cannam@162: for( channelIndex=0; channelIndexnumChannels; channelIndex++ ) cannam@162: { cannam@162: /* Output sine wave on every channel. */ cannam@162: *out++ = (float) sin(data->phases[channelIndex]); cannam@162: cannam@162: /* Play each channel at a higher frequency. */ cannam@162: data->phases[channelIndex] += FREQ_INCR * (4 + channelIndex); cannam@162: if( data->phases[channelIndex] >= (2.0 * M_PI) ) data->phases[channelIndex] -= (2.0 * M_PI); cannam@162: } cannam@162: } cannam@162: } cannam@162: else cannam@162: { cannam@162: for( frameIndex=0; frameIndex<(int)framesPerBuffer; frameIndex++ ) cannam@162: { cannam@162: for( channelIndex=0; channelIndexnumChannels; channelIndex++ ) cannam@162: { cannam@162: /* Output sine wave on every channel. */ cannam@162: outputs[channelIndex][frameIndex] = (float) sin(data->phases[channelIndex]); cannam@162: cannam@162: /* Play each channel at a higher frequency. */ cannam@162: data->phases[channelIndex] += FREQ_INCR * (4 + channelIndex); cannam@162: if( data->phases[channelIndex] >= (2.0 * M_PI) ) data->phases[channelIndex] -= (2.0 * M_PI); cannam@162: } cannam@162: } cannam@162: } cannam@162: return 0; cannam@162: } cannam@162: cannam@162: /*******************************************************************/ cannam@162: int test(short interleaved) cannam@162: { cannam@162: PaStream* stream; cannam@162: PaStreamParameters outputParameters; cannam@162: PaError err; cannam@162: const PaDeviceInfo* pdi; cannam@162: paTestData data; cannam@162: short n; cannam@162: cannam@162: outputParameters.device = Pa_GetDefaultOutputDevice(); /* Default output device, max channels. */ cannam@162: if (outputParameters.device == paNoDevice) { cannam@162: fprintf(stderr,"Error: No default output device.\n"); cannam@162: return paInvalidDevice; cannam@162: } cannam@162: pdi = Pa_GetDeviceInfo(outputParameters.device); cannam@162: outputParameters.channelCount = pdi->maxOutputChannels; cannam@162: if (outputParameters.channelCount > MAX_CHANNELS) cannam@162: outputParameters.channelCount = MAX_CHANNELS; cannam@162: outputParameters.sampleFormat = paFloat32; /* 32 bit floating point output */ cannam@162: outputParameters.suggestedLatency = pdi->defaultLowOutputLatency; cannam@162: outputParameters.hostApiSpecificStreamInfo = NULL; cannam@162: cannam@162: data.interleaved = interleaved; cannam@162: data.numChannels = outputParameters.channelCount; cannam@162: for (n = 0; n < data.numChannels; n++) cannam@162: data.phases[n] = 0.0; /* Phases wrap and maybe don't need initialisation. */ cannam@162: printf("%d ", data.numChannels); cannam@162: if (interleaved) cannam@162: printf("interleaved "); cannam@162: else cannam@162: { cannam@162: printf(" non-interleaved "); cannam@162: outputParameters.sampleFormat |= paNonInterleaved; cannam@162: } cannam@162: printf("channels.\n"); cannam@162: cannam@162: err = Pa_OpenStream(&stream, cannam@162: NULL, /* No input. */ cannam@162: &outputParameters, cannam@162: SAMPLE_RATE, /* Sample rate. */ cannam@162: FRAMES_PER_BUFFER, /* Frames per buffer. */ cannam@162: paClipOff, /* Samples never out of range, no clipping. */ cannam@162: patestCallback, cannam@162: &data); cannam@162: if (err == paNoError) cannam@162: { cannam@162: err = Pa_StartStream(stream); cannam@162: if (err == paNoError) cannam@162: { cannam@162: printf("Hit ENTER to stop this test.\n"); cannam@162: getchar(); cannam@162: err = Pa_StopStream(stream); cannam@162: } cannam@162: Pa_CloseStream( stream ); cannam@162: } cannam@162: return err; cannam@162: } cannam@162: cannam@162: cannam@162: /*******************************************************************/ cannam@162: int main(void) cannam@162: { cannam@162: PaError err; cannam@162: cannam@162: printf("PortAudio Test: output sine wave on each channel.\n" ); cannam@162: cannam@162: err = Pa_Initialize(); cannam@162: if (err != paNoError) cannam@162: goto done; cannam@162: cannam@162: err = test(1); /* 1 means interleaved. */ cannam@162: if (err != paNoError) cannam@162: goto done; cannam@162: cannam@162: err = test(0); /* 0 means not interleaved. */ cannam@162: if (err != paNoError) cannam@162: goto done; cannam@162: cannam@162: printf("Test finished.\n"); cannam@162: done: cannam@162: if (err) cannam@162: { cannam@162: fprintf(stderr, "An error occured while using the portaudio stream\n"); cannam@162: fprintf(stderr, "Error number: %d\n", err ); cannam@162: fprintf(stderr, "Error message: %s\n", Pa_GetErrorText(err)); cannam@162: } cannam@162: Pa_Terminate(); cannam@162: return 0; cannam@162: }