diff options
Diffstat (limited to 'pd/portaudio_v18/pa_tests/patest_leftright.c')
| -rw-r--r-- | pd/portaudio_v18/pa_tests/patest_leftright.c | 168 |
1 files changed, 0 insertions, 168 deletions
diff --git a/pd/portaudio_v18/pa_tests/patest_leftright.c b/pd/portaudio_v18/pa_tests/patest_leftright.c deleted file mode 100644 index 6e6172ac..00000000 --- a/pd/portaudio_v18/pa_tests/patest_leftright.c +++ /dev/null @@ -1,168 +0,0 @@ -/* - * $Id: patest_leftright.c,v 1.2 2002/02/22 21:46:18 philburk Exp $ - * patest_leftright.c - * Play different tone sine waves that alternate between left and right channel. - * The low tone should be on the left channel. - * - * Authors: - * Ross Bencina <rossb@audiomulch.com> - * Phil Burk <philburk@softsynth.com> - * - * This program uses the PortAudio Portable Audio Library. - * For more information see: http://www.audiomulch.com/portaudio/ - * 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. - * - * 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. - * - * 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. - * - */ -#include <stdio.h> -#include <math.h> -#include "portaudio.h" -#define NUM_SECONDS (8) -#define SAMPLE_RATE (44100) -#define FRAMES_PER_BUFFER (512) -#ifndef M_PI -#define M_PI (3.14159265) -#endif -#define TABLE_SIZE (200) -typedef struct -{ - float sine[TABLE_SIZE]; - int left_phase; - int right_phase; - int toggle; - int countDown; -} -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( void *inputBuffer, void *outputBuffer, - unsigned long framesPerBuffer, - PaTimestamp outTime, void *userData ) -{ - paTestData *data = (paTestData*)userData; - float *out = (float*)outputBuffer; - unsigned long i; - int finished = 0; - (void) outTime; /* Prevent unused variable warnings. */ - (void) inputBuffer; - - for( i=0; i<framesPerBuffer; i++ ) - { - if( data->toggle ) - { - *out++ = data->sine[data->left_phase]; /* left */ - *out++ = 0; /* right */ - } - else - { - *out++ = 0; /* left */ - *out++ = 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; - } - - if( data->countDown < 0 ) - { - data->countDown = SAMPLE_RATE; - data->toggle = !data->toggle; - } - data->countDown -= framesPerBuffer; - - return finished; -} - -/*******************************************************************/ -int main(void); -int main(void) -{ - PortAudioStream *stream; - PaError err; - paTestData data; - int i; - int timeout; - - printf("Play different tone sine waves that alternate between left and right channel.\n"); - printf("The low tone should be on the left channel.\n"); - - /* initialise sinusoidal wavetable */ - for( i=0; i<TABLE_SIZE; i++ ) - { - data.sine[i] = (float) sin( ((double)i/(double)TABLE_SIZE) * M_PI * 2. ); - } - data.left_phase = data.right_phase = data.toggle = 0; - data.countDown = SAMPLE_RATE; - - err = Pa_Initialize(); - if( err != paNoError ) goto error; - - err = Pa_OpenStream( - &stream, - paNoDevice,/* default input device */ - 0, /* no input */ - paFloat32, /* 32 bit floating point input */ - NULL, - Pa_GetDefaultOutputDeviceID(), /* default output device */ - 2, /* stereo output */ - paFloat32, /* 32 bit floating point output */ - NULL, - SAMPLE_RATE, - FRAMES_PER_BUFFER, /* frames per buffer */ - 0, /* number of buffers, if zero then use default minimum */ - paClipOff, /* we won't output out of range samples so don't bother clipping them */ - patestCallback, - &data ); - if( err != paNoError ) goto error; - - err = Pa_StartStream( stream ); - if( err != paNoError ) goto error; - - printf("Play for several seconds.\n"); - timeout = NUM_SECONDS * 4; - while( timeout > 0 ) - { - Pa_Sleep( 300 ); - timeout -= 1; - } - - err = Pa_StopStream( stream ); - if( err != paNoError ) goto error; - err = Pa_CloseStream( stream ); - if( err != paNoError ) goto error; - Pa_Terminate(); - printf("Test finished.\n"); - return err; -error: - Pa_Terminate(); - fprintf( stderr, "An error occured while using the portaudio stream\n" ); - fprintf( stderr, "Error number: %d\n", err ); - fprintf( stderr, "Error message: %s\n", Pa_GetErrorText( err ) ); - return err; -} |