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Diffstat (limited to 'portaudio/test/patest_multi_sine.c')
| -rw-r--r-- | portaudio/test/patest_multi_sine.c | 205 |
1 files changed, 205 insertions, 0 deletions
diff --git a/portaudio/test/patest_multi_sine.c b/portaudio/test/patest_multi_sine.c new file mode 100644 index 0000000..ec9ed8c --- /dev/null +++ b/portaudio/test/patest_multi_sine.c @@ -0,0 +1,205 @@ +/** @file patest_multi_sine.c + @ingroup test_src + @brief Play a different sine wave on each channel. + @author Phil Burk http://www.softsynth.com +*/ +/* + * $Id$ + * + * This program uses the PortAudio Portable Audio Library. + * For more information see: http://www.portaudio.com + * Copyright (c) 1999-2000 Ross Bencina and Phil Burk + * + * Permission is hereby granted, free of charge, to any person obtaining + * a copy of this software and associated documentation files + * (the "Software"), to deal in the Software without restriction, + * including without limitation the rights to use, copy, modify, merge, + * publish, distribute, sublicense, and/or sell copies of the Software, + * and to permit persons to whom the Software is furnished to do so, + * subject to the following conditions: + * + * The above copyright notice and this permission notice shall be + * included in all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, + * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF + * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. + * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR + * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF + * CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION + * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. + */ + +/* + * The text above constitutes the entire PortAudio license; however, + * the PortAudio community also makes the following non-binding requests: + * + * Any person wishing to distribute modifications to the Software is + * requested to send the modifications to the original developer so that + * they can be incorporated into the canonical version. It is also + * requested that these non-binding requests be included along with the + * license above. + */ + +#include <stdio.h> +#include <math.h> + +#include "portaudio.h" + +#define SAMPLE_RATE (44100) +#define FRAMES_PER_BUFFER (128) +#define FREQ_INCR (300.0 / SAMPLE_RATE) +#define MAX_CHANNELS (64) + +#ifndef M_PI +#define M_PI (3.14159265) +#endif + +typedef struct +{ + short interleaved; /* Nonzero for interleaved / zero for non-interleaved. */ + int numChannels; /* Actually used. */ + double phases[MAX_CHANNELS]; /* Each channel gets its' own frequency. */ +} +paTestData; + +/* This routine will be called by the PortAudio engine when audio is needed. +** It may called at interrupt level on some machines so don't do anything +** that could mess up the system like calling malloc() or free(). +*/ +static int patestCallback(const void* inputBuffer, + void* outputBuffer, + unsigned long framesPerBuffer, + const PaStreamCallbackTimeInfo* timeInfo, + PaStreamCallbackFlags statusFlags, + void* userData) +{ + int frameIndex, channelIndex; + float** outputs = (float**)outputBuffer; + paTestData* data = (paTestData*)userData; + + (void) inputBuffer; /* Prevent unused arg warning. */ + if (data->interleaved) + { + float *out = (float*)outputBuffer; /* interleaved version */ + for( frameIndex=0; frameIndex<(int)framesPerBuffer; frameIndex++ ) + { + for( channelIndex=0; channelIndex<data->numChannels; channelIndex++ ) + { + /* Output sine wave on every channel. */ + *out++ = (float) sin(data->phases[channelIndex]); + + /* Play each channel at a higher frequency. */ + data->phases[channelIndex] += FREQ_INCR * (4 + channelIndex); + if( data->phases[channelIndex] >= (2.0 * M_PI) ) data->phases[channelIndex] -= (2.0 * M_PI); + } + } + } + else + { + for( frameIndex=0; frameIndex<(int)framesPerBuffer; frameIndex++ ) + { + for( channelIndex=0; channelIndex<data->numChannels; channelIndex++ ) + { + /* Output sine wave on every channel. */ + outputs[channelIndex][frameIndex] = (float) sin(data->phases[channelIndex]); + + /* Play each channel at a higher frequency. */ + data->phases[channelIndex] += FREQ_INCR * (4 + channelIndex); + if( data->phases[channelIndex] >= (2.0 * M_PI) ) data->phases[channelIndex] -= (2.0 * M_PI); + } + } + } + return 0; +} + +/*******************************************************************/ +int test(short interleaved) +{ + PaStream* stream; + PaStreamParameters outputParameters; + PaError err; + const PaDeviceInfo* pdi; + paTestData data; + short n; + + outputParameters.device = Pa_GetDefaultOutputDevice(); /* Default output device, max channels. */ + if (outputParameters.device == paNoDevice) { + fprintf(stderr,"Error: No default output device.\n"); + return paInvalidDevice; + } + pdi = Pa_GetDeviceInfo(outputParameters.device); + outputParameters.channelCount = pdi->maxOutputChannels; + if (outputParameters.channelCount > MAX_CHANNELS) + outputParameters.channelCount = MAX_CHANNELS; + outputParameters.sampleFormat = paFloat32; /* 32 bit floating point output */ + outputParameters.suggestedLatency = pdi->defaultLowOutputLatency; + outputParameters.hostApiSpecificStreamInfo = NULL; + + data.interleaved = interleaved; + data.numChannels = outputParameters.channelCount; + for (n = 0; n < data.numChannels; n++) + data.phases[n] = 0.0; /* Phases wrap and maybe don't need initialisation. */ + printf("%d ", data.numChannels); + if (interleaved) + printf("interleaved "); + else + { + printf(" non-interleaved "); + outputParameters.sampleFormat |= paNonInterleaved; + } + printf("channels.\n"); + + err = Pa_OpenStream(&stream, + NULL, /* No input. */ + &outputParameters, + SAMPLE_RATE, /* Sample rate. */ + FRAMES_PER_BUFFER, /* Frames per buffer. */ + paClipOff, /* Samples never out of range, no clipping. */ + patestCallback, + &data); + if (err == paNoError) + { + err = Pa_StartStream(stream); + if (err == paNoError) + { + printf("Hit ENTER to stop this test.\n"); + getchar(); + err = Pa_StopStream(stream); + } + Pa_CloseStream( stream ); + } + return err; +} + + +/*******************************************************************/ +int main(void) +{ + PaError err; + + printf("PortAudio Test: output sine wave on each channel.\n" ); + + err = Pa_Initialize(); + if (err != paNoError) + goto done; + + err = test(1); /* 1 means interleaved. */ + if (err != paNoError) + goto done; + + err = test(0); /* 0 means not interleaved. */ + if (err != paNoError) + goto done; + + printf("Test finished.\n"); +done: + if (err) + { + fprintf(stderr, "An error occurred while using the portaudio stream\n"); + fprintf(stderr, "Error number: %d\n", err ); + fprintf(stderr, "Error message: %s\n", Pa_GetErrorText(err)); + } + Pa_Terminate(); + return 0; +} |