add plibsys

1 files changed, 0 insertions, 280 deletions

diff --git a/portaudio/examples/paex_pink.c b/portaudio/examples/paex_pink.c
deleted file mode 100644
index 519f979..0000000
--- a/portaudio/examples/paex_pink.c
+++ /dev/null
@@ -1,280 +0,0 @@
-/** @file paex_pink.c
-    @ingroup examples_src
-    @brief Generate Pink Noise using Gardner method.
-
-    Optimization suggested by James McCartney uses a tree
-    to select which random value to replace.
-<pre>
-    x x x x x x x x x x x x x x x x
-    x   x   x   x   x   x   x   x
-    x       x       x       x
-     x               x
-       x
-</pre>
-    Tree is generated by counting trailing zeros in an increasing index.
-    When the index is zero, no random number is selected.
-
-    @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 PINK_MAX_RANDOM_ROWS   (30)
-#define PINK_RANDOM_BITS       (24)
-#define PINK_RANDOM_SHIFT      ((sizeof(long)*8)-PINK_RANDOM_BITS)
-
-typedef struct
-{
-    long      pink_Rows[PINK_MAX_RANDOM_ROWS];
-    long      pink_RunningSum;   /* Used to optimize summing of generators. */
-    int       pink_Index;        /* Incremented each sample. */
-    int       pink_IndexMask;    /* Index wrapped by ANDing with this mask. */
-    float     pink_Scalar;       /* Used to scale within range of -1.0 to +1.0 */
-}
-PinkNoise;
-
-/* Prototypes */
-static unsigned long GenerateRandomNumber( void );
-void InitializePinkNoise( PinkNoise *pink, int numRows );
-float GeneratePinkNoise( PinkNoise *pink );
-
-/************************************************************/
-/* Calculate pseudo-random 32 bit number based on linear congruential method. */
-static unsigned long GenerateRandomNumber( void )
-{
-    /* Change this seed for different random sequences. */
-    static unsigned long randSeed = 22222;
-    randSeed = (randSeed * 196314165) + 907633515;
-    return randSeed;
-}
-
-/************************************************************/
-/* Setup PinkNoise structure for N rows of generators. */
-void InitializePinkNoise( PinkNoise *pink, int numRows )
-{
-    int i;
-    long pmax;
-    pink->pink_Index = 0;
-    pink->pink_IndexMask = (1<<numRows) - 1;
-    /* Calculate maximum possible signed random value. Extra 1 for white noise always added. */
-    pmax = (numRows + 1) * (1<<(PINK_RANDOM_BITS-1));
-    pink->pink_Scalar = 1.0f / pmax;
-    /* Initialize rows. */
-    for( i=0; i<numRows; i++ ) pink->pink_Rows[i] = 0;
-    pink->pink_RunningSum = 0;
-}
-
-#define PINK_MEASURE
-#ifdef PINK_MEASURE
-float pinkMax = -999.0;
-float pinkMin =  999.0;
-#endif
-
-/* Generate Pink noise values between -1.0 and +1.0 */
-float GeneratePinkNoise( PinkNoise *pink )
-{
-    long newRandom;
-    long sum;
-    float output;
-    /* Increment and mask index. */
-    pink->pink_Index = (pink->pink_Index + 1) & pink->pink_IndexMask;
-    /* If index is zero, don't update any random values. */
-    if( pink->pink_Index != 0 )
-    {
-        /* Determine how many trailing zeros in PinkIndex. */
-        /* This algorithm will hang if n==0 so test first. */
-        int numZeros = 0;
-        int n = pink->pink_Index;
-        while( (n & 1) == 0 )
-        {
-            n = n >> 1;
-            numZeros++;
-        }
-        /* Replace the indexed ROWS random value.
-         * Subtract and add back to RunningSum instead of adding all the random
-         * values together. Only one changes each time.
-         */
-        pink->pink_RunningSum -= pink->pink_Rows[numZeros];
-        newRandom = ((long)GenerateRandomNumber()) >> PINK_RANDOM_SHIFT;
-        pink->pink_RunningSum += newRandom;
-        pink->pink_Rows[numZeros] = newRandom;
-    }
-
-    /* Add extra white noise value. */
-    newRandom = ((long)GenerateRandomNumber()) >> PINK_RANDOM_SHIFT;
-    sum = pink->pink_RunningSum + newRandom;
-    /* Scale to range of -1.0 to 0.9999. */
-    output = pink->pink_Scalar * sum;
-#ifdef PINK_MEASURE
-    /* Check Min/Max */
-    if( output > pinkMax ) pinkMax = output;
-    else if( output < pinkMin ) pinkMin = output;
-#endif
-    return output;
-}
-
-/*******************************************************************/
-#define PINK_TEST
-#ifdef PINK_TEST
-
-/* Context for callback routine. */
-typedef struct
-{
-    PinkNoise   leftPink;
-    PinkNoise   rightPink;
-    unsigned int sampsToGo;
-}
-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 finished;
-    int i;
-    int numFrames;
-    paTestData *data = (paTestData*)userData;
-    float *out = (float*)outputBuffer;
-    (void) inputBuffer; /* Prevent "unused variable" warnings. */
-
-    /* Are we almost at end. */
-    if( data->sampsToGo < framesPerBuffer )
-    {
-        numFrames = data->sampsToGo;
-        finished = 1;
-    }
-    else
-    {
-        numFrames = framesPerBuffer;
-        finished = 0;
-    }
-    for( i=0; i<numFrames; i++ )
-    {
-        *out++ = GeneratePinkNoise( &data->leftPink );
-        *out++ = GeneratePinkNoise( &data->rightPink );
-    }
-    data->sampsToGo -= numFrames;
-    return finished;
-}
-
-/*******************************************************************/
-int main(void);
-int main(void)
-{
-    PaStream*           stream;
-    PaError             err;
-    paTestData          data;
-    PaStreamParameters  outputParameters;
-    int                 totalSamps;
-    static const double SR  = 44100.0;
-    static const int    FPB = 2048; /* Frames per buffer: 46 ms buffers. */
-
-    /* Initialize two pink noise signals with different numbers of rows. */
-    InitializePinkNoise( &data.leftPink,  12 );
-    InitializePinkNoise( &data.rightPink, 16 );
-
-    /* Look at a few values. */
-    {
-        int i;
-        float pink;
-        for( i=0; i<20; i++ )
-        {
-            pink = GeneratePinkNoise( &data.leftPink );
-            printf("Pink = %f\n", pink );
-        }
-    }
-
-    data.sampsToGo = totalSamps = (int)(60.0 * SR);   /* Play a whole minute. */
-    err = Pa_Initialize();
-    if( err != paNoError ) goto error;
-
-    /* Open a stereo PortAudio stream so we can hear the result. */
-    outputParameters.device = Pa_GetDefaultOutputDevice(); /* Take the default output device. */
-    if (outputParameters.device == paNoDevice) {
-        fprintf(stderr,"Error: No default output device.\n");
-        goto error;
-    }
-    outputParameters.channelCount = 2;                     /* Stereo output, most likely supported. */
-    outputParameters.hostApiSpecificStreamInfo = NULL;
-    outputParameters.sampleFormat = paFloat32;             /* 32 bit floating point output. */
-    outputParameters.suggestedLatency =
-                     Pa_GetDeviceInfo(outputParameters.device)->defaultLowOutputLatency;
-    err = Pa_OpenStream(&stream,
-                        NULL,                              /* No input. */
-                        &outputParameters,
-                        SR,                                /* Sample rate. */
-                        FPB,                               /* Frames per buffer. */
-                        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("Stereo pink noise for one minute...\n");
-
-    while( ( err = Pa_IsStreamActive( stream ) ) == 1 ) Pa_Sleep(100);
-    if( err < 0 ) goto error;
-
-    err = Pa_CloseStream( stream );
-    if( err != paNoError ) goto error;
-#ifdef PINK_MEASURE
-    printf("Pink min = %f, max = %f\n", pinkMin, pinkMax );
-#endif
-    Pa_Terminate();
-    return 0;
-error:
-    Pa_Terminate();
-    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 0;
-}
-#endif /* PINK_TEST */