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Paul Dino Jones
2022-10-31 15:11:02 +00:00
commit 9325e207be
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tests/patest_longsine.c
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/** @file patest_longsine.c
@ingroup test_src
@brief Play a sine wave until ENTER hit.
@author Phil Burk http://www.softsynth.com
*/
/*
* $Id: patest_longsine.c 1097 2006-08-26 08:27:53Z rossb $
*
* 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 <unistd.h>
#include "portaudio.h"
#define SAMPLE_RATE (44100)
#ifndef M_PI
#define M_PI (3.14159265)
#endif
#define MAX_TABLE_SIZE (6000)
//#define TABLE_SIZE (3200)
//#define HALF_TABLE (1600)
typedef struct
{
float sine[MAX_TABLE_SIZE];
float pitch;
int left_phase;
int right_phase;
int n;
int table_size;
int amp;
}
paTestData;
int x = 0;
int y = 0;
long n = 0;
//float note = 256;
float note = 60;
//float note = 161.626;
/* 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)
{
paTestData* data = (paTestData*)userData;
float* out = (float*)outputBuffer;
unsigned int i;
unsigned int n;
n = data->n;
(void) inputBuffer; /* Prevent unused argument warning. */
for( i=0; i<framesPerBuffer; i++,n++ )
{
//data->sine[i] = (float) sin( ((double)i/(double) MAX_TABLE_SIZE) * ( ( M_PI * 2. ) ) );
//data->sine[n] = sin ( 2 * M_PI * ((float) n / (float) MAX_TABLE_SIZE) );
//data->right_phase = data->left_phase;
//data->left_phase = n;
//data->right_phase = n;
float v = data->amp * sin (2 * M_PI * ((float) n) / (float) SAMPLE_RATE);
//*out++ = data->sine[data->left_phase];
//*out++ = data->sine[data->right_phase];
if (n>=data->table_size)
{
n=0;
}
*out++ = v;
*out++ = v;
data->left_phase += 1;
data->right_phase += 1;
/*
float v = 800.81;
if (i>=512)
{
v = -v;
}
*out++ = v;
*out++ = v;
*/
//if( data->left_phase >= MAX_TABLE_SIZE ) data->left_phase -= MAX_TABLE_SIZE;
//if( data->right_phase >= MAX_TABLE_SIZE ) data->right_phase -= MAX_TABLE_SIZE;
if( data->left_phase >= data->table_size )
{
data->left_phase -= data->table_size;
}
if( data->right_phase >= data->table_size )
{
data->right_phase -= data->table_size;
}
}
data->n=n;
return 0;
}
void generatesamples(int table_size, int half_table, int datum, paTestData* data)
{
datum = 1;
int j;
for( j=data->n; j<MAX_TABLE_SIZE; j++)
{
for( int i=0; i<data->table_size; i++,j++ )
{
//data.sine[i] = (float) amp * sin( ((double)i/(double) TABLE_SIZE) * ( ( M_PI * 2. * freq) ) );
data->sine[j] = (float) datum * sin( ((double)i/(double) data->table_size) * ( ( M_PI * 2. ) ) );
/*
data->sine[i] = datum;
if (i>=half_table) {
data->sine[i] = -datum;
}
*/
data->n=j;
}
}
}
/*******************************************************************/
int main(void);
int main(void)
{
PaStreamParameters outputParameters;
PaStream* stream;
PaError err;
paTestData data;
int i;
printf("PortAudio Test: output sine wave.\n");
float amp = ((float)32);
amp = ((float)32);
//float freq = ((float) freq1/(SAMPLE_RATE/TABLE_SIZE));
int freq = 32;
// 500 rpms
int table_size = 5292;
int half_table = 2646;
table_size = 200;
half_table = 50;
data.pitch = 1;
data.pitch = 261.626;
data.amp = 2;
//data.pitch = 523.25;
//table_size = 2646;
//half_table = 1323;
//table_size = 3200;
//half_table = 1600;
/* initialise sinusoidal wavetable */
data.table_size=5292;
//generatesamples(table_size,half_table,5,&data);
data.left_phase = data.right_phase = 0;
err = Pa_Initialize();
if( err != paNoError )
{
goto error;
}
outputParameters.device = Pa_GetDefaultOutputDevice(); /* default output device */
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, /* As above. */
SAMPLE_RATE,
440, /* Frames per buffer. */
paClipOff, /* No out of range samples expected. */
patestCallback,
&data );
if( err != paNoError )
{
goto error;
}
fprintf(stdout,"Revving to 500 rpm...\n");
err = Pa_StartStream( stream );
if( err != paNoError )
{
goto error;
}
//printf("Hit ENTER to stop program.\n");
//getchar();
sleep(10);
table_size = 2646;
half_table = 1323;
table_size = 100;
data.table_size = 2646;
half_table = 100;
fprintf(stdout,"Revving to 1000 rpm...\n");
//generatesamples(table_size,half_table,5,&data);
data.pitch = 523.25;
sleep(10);
table_size = 1764;
half_table = 882;
table_size = 400;
half_table = 200;
data.table_size = 1764;
fprintf(stdout,"Revving to 1500 rpm...\n");
//generatesamples(table_size,half_table,5,&data);
sleep(5);
table_size = 1323;
half_table = 661;
data.table_size = 1323;
fprintf(stdout,"Revving to 2000 rpm...\n");
//generatesamples(table_size,half_table,5,&data);
sleep(5);
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;
}