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 <stdio.h>
Chris@4: #include <math.h>
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; channelIndex<data->numChannels; 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; channelIndex<data->numChannels; 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: }