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Diffstat (limited to 'portaudio/test/patest_clip.c')
| -rw-r--r-- | portaudio/test/patest_clip.c | 190 |
1 files changed, 0 insertions, 190 deletions
diff --git a/portaudio/test/patest_clip.c b/portaudio/test/patest_clip.c deleted file mode 100644 index 77989f4..0000000 --- a/portaudio/test/patest_clip.c +++ /dev/null @@ -1,190 +0,0 @@ -/** @file patest_clip.c - @ingroup test_src - @brief Play a sine wave for several seconds at an amplitude - that would require clipping. - - @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 NUM_SECONDS (4) -#define SAMPLE_RATE (44100) -#ifndef M_PI -#define M_PI (3.14159265) -#endif -#define TABLE_SIZE (200) - -typedef struct paTestData -{ - float sine[TABLE_SIZE]; - float amplitude; - int left_phase; - int right_phase; -} -paTestData; - -PaError PlaySine( paTestData *data, unsigned long flags, float amplitude ); - -/* 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 sineCallback( const void *inputBuffer, void *outputBuffer, - unsigned long framesPerBuffer, - const PaStreamCallbackTimeInfo* timeInfo, - PaStreamCallbackFlags statusFlags, - void *userData ) -{ - paTestData *data = (paTestData*)userData; - float *out = (float*)outputBuffer; - float amplitude = data->amplitude; - unsigned int i; - (void) inputBuffer; /* Prevent "unused variable" warnings. */ - (void) timeInfo; - (void) statusFlags; - - for( i=0; i<framesPerBuffer; i++ ) - { - *out++ = amplitude * data->sine[data->left_phase]; /* left */ - *out++ = amplitude * data->sine[data->right_phase]; /* right */ - data->left_phase += 1; - if( data->left_phase >= TABLE_SIZE ) data->left_phase -= TABLE_SIZE; - data->right_phase += 3; /* higher pitch so we can distinguish left and right. */ - if( data->right_phase >= TABLE_SIZE ) data->right_phase -= TABLE_SIZE; - } - return 0; -} -/*******************************************************************/ -int main(void); -int main(void) -{ - PaError err; - paTestData data; - int i; - - printf("PortAudio Test: output sine wave with and without clipping.\n"); - /* initialise sinusoidal wavetable */ - for( i=0; i<TABLE_SIZE; i++ ) - { - data.sine[i] = (float) sin( ((double)i/(double)TABLE_SIZE) * M_PI * 2. ); - } - - printf("\nHalf amplitude. Should sound like sine wave.\n"); fflush(stdout); - err = PlaySine( &data, paClipOff | paDitherOff, 0.5f ); - if( err < 0 ) goto error; - - printf("\nFull amplitude. Should sound like sine wave.\n"); fflush(stdout); - err = PlaySine( &data, paClipOff | paDitherOff, 0.999f ); - if( err < 0 ) goto error; - - printf("\nOver range with clipping and dithering turned OFF. Should sound very nasty.\n"); - fflush(stdout); - err = PlaySine( &data, paClipOff | paDitherOff, 1.1f ); - if( err < 0 ) goto error; - - printf("\nOver range with clipping and dithering turned ON. Should sound smoother than previous.\n"); - fflush(stdout); - err = PlaySine( &data, paNoFlag, 1.1f ); - if( err < 0 ) goto error; - - printf("\nOver range with paClipOff but dithering ON.\n" - "That forces clipping ON so it should sound the same as previous.\n"); - fflush(stdout); - err = PlaySine( &data, paClipOff, 1.1f ); - if( err < 0 ) goto error; - - return 0; -error: - 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 ) ); - return 1; -} -/*****************************************************************************/ -PaError PlaySine( paTestData *data, unsigned long flags, float amplitude ) -{ - PaStreamParameters outputParameters; - PaStream *stream; - PaError err; - - data->left_phase = data->right_phase = 0; - data->amplitude = amplitude; - - err = Pa_Initialize(); - if( err != paNoError ) goto error; - - outputParameters.device = Pa_GetDefaultOutputDevice(); /* default output device */ - if (outputParameters.device == paNoDevice) { - fprintf(stderr,"Error: No default output device.\n"); - goto error; - } - outputParameters.channelCount = 2; /* stereo output */ - outputParameters.sampleFormat = paFloat32; /* 32 bit floating point output */ - outputParameters.suggestedLatency = Pa_GetDeviceInfo( outputParameters.device )->defaultLowOutputLatency; - outputParameters.hostApiSpecificStreamInfo = NULL; - - err = Pa_OpenStream( - &stream, - NULL, /* no input */ - &outputParameters, - SAMPLE_RATE, - 1024, - flags, - sineCallback, - data ); - if( err != paNoError ) goto error; - - err = Pa_StartStream( stream ); - if( err != paNoError ) goto error; - - Pa_Sleep( NUM_SECONDS * 1000 ); - printf("CPULoad = %8.6f\n", Pa_GetStreamCpuLoad( stream ) ); - - err = Pa_CloseStream( stream ); - if( err != paNoError ) goto error; - - Pa_Terminate(); - return paNoError; -error: - return err; -} |