From a4dd0ad63c00f4dee3b86dfd3075d1d61b2b3180 Mon Sep 17 00:00:00 2001
From: sanine <sanine.not@pm.me>
Date: Sat, 27 Aug 2022 23:52:56 -0500
Subject: add plibsys

---
 portaudio/qa/loopback/src/test_audio_analyzer.c | 718 ------------------------
 1 file changed, 718 deletions(-)
 delete mode 100644 portaudio/qa/loopback/src/test_audio_analyzer.c

(limited to 'portaudio/qa/loopback/src/test_audio_analyzer.c')

diff --git a/portaudio/qa/loopback/src/test_audio_analyzer.c b/portaudio/qa/loopback/src/test_audio_analyzer.c
deleted file mode 100644
index 82fa859..0000000
--- a/portaudio/qa/loopback/src/test_audio_analyzer.c
+++ /dev/null
@@ -1,718 +0,0 @@
-
-/*
- * PortAudio Portable Real-Time Audio Library
- * Latest Version at: http://www.portaudio.com
- *
- * Copyright (c) 1999-2010 Phil Burk and Ross Bencina
- *
- * 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 <stdlib.h>
-#include <math.h>
-#include "qa_tools.h"
-#include "audio_analyzer.h"
-#include "test_audio_analyzer.h"
-#include "write_wav.h"
-#include "biquad_filter.h"
-
-#define FRAMES_PER_BLOCK  (64)
-#define PRINT_REPORTS  0
-
-#define TEST_SAVED_WAVE  (0)
-
-/*==========================================================================================*/
-/**
- * Detect a single tone.
- */
-static int TestSingleMonoTone( void )
-{
-    int result = 0;
-    PaQaSineGenerator generator;
-    PaQaRecording     recording;
-    float buffer[FRAMES_PER_BLOCK];
-    double sampleRate = 44100.0;
-    int maxFrames = ((int)sampleRate) * 1;
-    int samplesPerFrame = 1;
-    int stride = 1;
-    int done = 0;
-
-    double freq = 234.5;
-    double amp = 0.5;
-
-    double mag1, mag2;
-
-    // Setup a sine oscillator.
-    PaQa_SetupSineGenerator( &generator, freq, amp, sampleRate );
-
-    result = PaQa_InitializeRecording( &recording, maxFrames, (int) sampleRate );
-    QA_ASSERT_EQUALS( "PaQa_InitializeRecording failed", 0, result );
-
-    done = 0;
-    while (!done)
-    {
-        PaQa_EraseBuffer( buffer, FRAMES_PER_BLOCK, samplesPerFrame );
-        PaQa_MixSine( &generator, buffer, FRAMES_PER_BLOCK, stride );
-        done = PaQa_WriteRecording( &recording, buffer, FRAMES_PER_BLOCK, samplesPerFrame );
-    }
-
-    mag1 = PaQa_CorrelateSine( &recording, freq, sampleRate, 0, recording.numFrames, NULL );
-    QA_ASSERT_CLOSE( "exact frequency match", amp, mag1, 0.01 );
-
-    mag2 = PaQa_CorrelateSine( &recording, freq * 1.23, sampleRate, 0, recording.numFrames, NULL );
-    QA_ASSERT_CLOSE( "wrong frequency", 0.0, mag2, 0.01 );
-
-    PaQa_TerminateRecording( &recording );
-    return 0;
-
-error:
-    PaQa_TerminateRecording( &recording);
-    return 1;
-
-}
-
-/*==========================================================================================*/
-/**
- * Mix multiple tones and then detect them.
- */
-
-static int TestMixedMonoTones( void )
-{
-    int i;
-    int result = 0;
-#define NUM_TONES (5)
-    PaQaSineGenerator generators[NUM_TONES];
-    PaQaRecording     recording;
-    float buffer[FRAMES_PER_BLOCK];
-    double sampleRate = 44100.0;
-    int maxFrames = ((int)sampleRate) * 1;
-    int samplesPerFrame = 1;
-
-    double baseFreq = 234.5;
-    double amp = 0.1;
-
-    double mag2;
-
-    int stride = samplesPerFrame;
-    int done = 0;
-
-    // Setup a sine oscillator.
-    for( i=0; i<NUM_TONES; i++ )
-    {
-        PaQa_SetupSineGenerator( &generators[i], PaQa_GetNthFrequency( baseFreq, i ), amp, sampleRate );
-    }
-
-    result = PaQa_InitializeRecording( &recording, maxFrames, (int) sampleRate );
-    QA_ASSERT_EQUALS( "PaQa_InitializeRecording failed", 0, result );
-
-    done = 0;
-    while (!done)
-    {
-        PaQa_EraseBuffer( buffer, FRAMES_PER_BLOCK, samplesPerFrame );
-        for( i=0; i<NUM_TONES; i++ )
-        {
-            PaQa_MixSine( &generators[i], buffer, FRAMES_PER_BLOCK, stride );
-        }
-        done = PaQa_WriteRecording( &recording, buffer, FRAMES_PER_BLOCK, samplesPerFrame );
-    }
-
-    for( i=0; i<NUM_TONES; i++ )
-    {
-        double mag = PaQa_CorrelateSine( &recording, PaQa_GetNthFrequency( baseFreq, i), sampleRate, 0, recording.numFrames, NULL );
-        QA_ASSERT_CLOSE( "exact frequency match", amp, mag, 0.01 );
-    }
-
-    mag2 = PaQa_CorrelateSine( &recording, baseFreq * 0.87, sampleRate, 0, recording.numFrames, NULL );
-    QA_ASSERT_CLOSE( "wrong frequency", 0.0, mag2, 0.01 );
-
-    PaQa_TerminateRecording( &recording );
-    return 0;
-
-error:
-    PaQa_TerminateRecording( &recording);
-    return 1;
-
-}
-
-
-/*==========================================================================================*/
-/**
- * Generate a recording with added or dropped frames.
- */
-
-static void MakeRecordingWithAddedFrames( PaQaRecording *recording, PaQaTestTone *testTone, int glitchPosition, int framesToAdd )
-{
-    PaQaSineGenerator generator;
-#define BUFFER_SIZE 512
-    float buffer[BUFFER_SIZE];
-
-    int frameCounter = testTone->startDelay;
-
-    int stride = 1;
-    // Record some initial silence.
-    int done = PaQa_WriteSilence( recording, testTone->startDelay );
-
-    // Setup a sine oscillator.
-    PaQa_SetupSineGenerator( &generator, testTone->frequency, testTone->amplitude, testTone->sampleRate );
-
-    while (!done)
-    {
-        int framesThisLoop = BUFFER_SIZE;
-
-        if( frameCounter == glitchPosition )
-        {
-            if( framesToAdd > 0 )
-            {
-                // Record some frozen data without advancing the sine generator.
-                done = PaQa_RecordFreeze( recording, framesToAdd );
-                frameCounter += framesToAdd;
-            }
-            else if( framesToAdd < 0 )
-            {
-                // Advance sine generator a few frames.
-                PaQa_MixSine( &generator, buffer, 0 - framesToAdd, stride );
-            }
-
-        }
-        else if( (frameCounter < glitchPosition) && ((frameCounter + framesThisLoop) > glitchPosition) )
-        {
-            // Go right up to the glitchPosition.
-            framesThisLoop = glitchPosition - frameCounter;
-        }
-
-        if( framesThisLoop > 0 )
-        {
-            PaQa_EraseBuffer( buffer, framesThisLoop, testTone->samplesPerFrame );
-            PaQa_MixSine( &generator, buffer, framesThisLoop, stride );
-            done = PaQa_WriteRecording( recording, buffer, framesThisLoop, testTone->samplesPerFrame );
-        }
-        frameCounter += framesThisLoop;
-    }
-}
-
-
-/*==========================================================================================*/
-/**
- * Generate a clean recording.
- */
-
-static void MakeCleanRecording( PaQaRecording *recording, PaQaTestTone *testTone )
-{
-    PaQaSineGenerator generator;
-#define BUFFER_SIZE 512
-    float buffer[BUFFER_SIZE];
-
-    int stride = 1;
-    // Record some initial silence.
-    int done = PaQa_WriteSilence( recording, testTone->startDelay );
-
-    // Setup a sine oscillator.
-    PaQa_SetupSineGenerator( &generator, testTone->frequency, testTone->amplitude, testTone->sampleRate );
-
-    // Generate recording with good phase.
-    while (!done)
-    {
-        PaQa_EraseBuffer( buffer, BUFFER_SIZE, testTone->samplesPerFrame );
-        PaQa_MixSine( &generator, buffer, BUFFER_SIZE, stride );
-        done = PaQa_WriteRecording( recording, buffer, BUFFER_SIZE, testTone->samplesPerFrame );
-    }
-}
-
-/*==========================================================================================*/
-/**
- * Generate a recording with pop.
- */
-
-static void MakeRecordingWithPop( PaQaRecording *recording, PaQaTestTone *testTone, int popPosition, int popWidth, double popAmplitude )
-{
-    int i;
-
-    MakeCleanRecording( recording, testTone );
-
-    // Apply glitch to good recording.
-    if( (popPosition + popWidth) >= recording->numFrames )
-    {
-        popWidth = (recording->numFrames - popPosition) - 1;
-    }
-
-    for( i=0; i<popWidth; i++ )
-    {
-        float good = recording->buffer[i+popPosition];
-        float bad = (good > 0.0) ? (good - popAmplitude) : (good + popAmplitude);
-        recording->buffer[i+popPosition] = bad;
-    }
-}
-
-/*==========================================================================================*/
-/**
- * Detect one phase error in a recording.
- */
-static int TestDetectSinglePhaseError( double sampleRate, int cycleSize, int latencyFrames, int glitchPosition, int framesAdded )
-{
-    int result = 0;
-    PaQaRecording     recording;
-    PaQaTestTone testTone;
-    PaQaAnalysisResult analysisResult = { 0.0 };
-    int framesDropped = 0;
-    int maxFrames = ((int)sampleRate) * 2;
-
-    testTone.samplesPerFrame = 1;
-    testTone.sampleRate = sampleRate;
-    testTone.frequency = sampleRate / cycleSize;
-    testTone.amplitude = 0.5;
-    testTone.startDelay = latencyFrames;
-
-    result = PaQa_InitializeRecording( &recording, maxFrames, (int) sampleRate );
-    QA_ASSERT_EQUALS( "PaQa_InitializeRecording failed", 0, result );
-
-    MakeRecordingWithAddedFrames( &recording, &testTone, glitchPosition, framesAdded );
-
-    PaQa_AnalyseRecording( &recording, &testTone, &analysisResult );
-
-    if( framesAdded < 0 )
-    {
-        framesDropped = -framesAdded;
-        framesAdded = 0;
-    }
-
-#if PRINT_REPORTS
-    printf("\n=== Dropped Frame Analysis ===================\n");
-    printf("                        expected      actual\n");
-    printf("             latency: %10.3f  %10.3f\n", (double)latencyFrames, analysisResult.latency );
-    printf("    num added frames: %10.3f  %10.3f\n", (double)framesAdded, analysisResult.numAddedFrames );
-    printf("     added frames at: %10.3f  %10.3f\n", (double)glitchPosition, analysisResult.addedFramesPosition );
-    printf("  num dropped frames: %10.3f  %10.3f\n", (double)framesDropped, analysisResult.numDroppedFrames );
-    printf("   dropped frames at: %10.3f  %10.3f\n", (double)glitchPosition, analysisResult.droppedFramesPosition );
-#endif
-
-    QA_ASSERT_CLOSE( "PaQa_AnalyseRecording latency", latencyFrames, analysisResult.latency, 0.5 );
-    QA_ASSERT_CLOSE( "PaQa_AnalyseRecording framesAdded", framesAdded, analysisResult.numAddedFrames, 1.0 );
-    QA_ASSERT_CLOSE( "PaQa_AnalyseRecording framesDropped", framesDropped, analysisResult.numDroppedFrames, 1.0 );
-//    QA_ASSERT_CLOSE( "PaQa_AnalyseRecording glitchPosition", glitchPosition, analysisResult.glitchPosition, cycleSize );
-
-    PaQa_TerminateRecording( &recording );
-    return 0;
-
-error:
-    PaQa_TerminateRecording( &recording);
-    return 1;
-}
-
-/*==========================================================================================*/
-/**
- * Test various dropped sample scenarios.
- */
-static int TestDetectPhaseErrors( void )
-{
-    int result;
-
-    result = TestDetectSinglePhaseError( 44100, 200, 477, -1, 0 );
-    if( result < 0 ) return result;
-/*
-    result = TestDetectSinglePhaseError( 44100, 200, 77, -1, 0 );
-    if( result < 0 ) return result;
-
-    result = TestDetectSinglePhaseError( 44100, 200, 83, 3712, 9 );
-    if( result < 0 ) return result;
-
-    result = TestDetectSinglePhaseError( 44100, 280, 83, 3712, 27 );
-    if( result < 0 ) return result;
-
-    result = TestDetectSinglePhaseError( 44100, 200, 234, 3712, -9 );
-    if( result < 0 ) return result;
-
-    result = TestDetectSinglePhaseError( 44100, 200, 2091, 8923, -2 );
-    if( result < 0 ) return result;
-
-    result = TestDetectSinglePhaseError( 44100, 120, 1782, 5772, -18 );
-    if( result < 0 ) return result;
-
-    // Note that if the frequency is too high then it is hard to detect single dropped frames.
-    result = TestDetectSinglePhaseError( 44100, 200, 500, 4251, -1 );
-    if( result < 0 ) return result;
-*/
-    return 0;
-}
-
-/*==========================================================================================*/
-/**
- * Detect one pop in a recording.
- */
-static int TestDetectSinglePop( double sampleRate, int cycleSize, int latencyFrames, int popPosition, int popWidth, double popAmplitude )
-{
-    int result = 0;
-    PaQaRecording     recording;
-    PaQaTestTone testTone;
-    PaQaAnalysisResult analysisResult = { 0.0 };
-    int maxFrames = ((int)sampleRate) * 2;
-
-    testTone.samplesPerFrame = 1;
-    testTone.sampleRate = sampleRate;
-    testTone.frequency = sampleRate / cycleSize;
-    testTone.amplitude = 0.5;
-    testTone.startDelay = latencyFrames;
-
-    result = PaQa_InitializeRecording( &recording, maxFrames, (int) sampleRate );
-    QA_ASSERT_EQUALS( "PaQa_InitializeRecording failed", 0, result );
-
-    MakeRecordingWithPop( &recording, &testTone, popPosition, popWidth, popAmplitude );
-
-    PaQa_AnalyseRecording( &recording, &testTone, &analysisResult );
-
-#if PRINT_REPORTS
-    printf("\n=== Pop Analysis ===================\n");
-    printf("                        expected      actual\n");
-    printf("             latency: %10.3f  %10.3f\n", (double)latencyFrames, analysisResult.latency );
-    printf("         popPosition: %10.3f  %10.3f\n", (double)popPosition, analysisResult.popPosition );
-    printf("        popAmplitude: %10.3f  %10.3f\n", popAmplitude, analysisResult.popAmplitude );
-    printf("           cycleSize: %6d\n", cycleSize );
-    printf("    num added frames: %10.3f\n", analysisResult.numAddedFrames );
-    printf("     added frames at: %10.3f\n", analysisResult.addedFramesPosition );
-    printf("  num dropped frames: %10.3f\n", analysisResult.numDroppedFrames );
-    printf("   dropped frames at: %10.3f\n", analysisResult.droppedFramesPosition );
-#endif
-
-    QA_ASSERT_CLOSE( "PaQa_AnalyseRecording latency", latencyFrames, analysisResult.latency, 0.5 );
-    QA_ASSERT_CLOSE( "PaQa_AnalyseRecording popPosition", popPosition, analysisResult.popPosition, 10 );
-    if( popWidth > 0 )
-    {
-        QA_ASSERT_CLOSE( "PaQa_AnalyseRecording popAmplitude", popAmplitude, analysisResult.popAmplitude, 0.1 * popAmplitude  );
-    }
-
-    PaQa_TerminateRecording( &recording );
-    return 0;
-
-error:
-    PaQa_SaveRecordingToWaveFile( &recording, "bad_recording.wav" );
-    PaQa_TerminateRecording( &recording);
-    return 1;
-}
-
-/*==========================================================================================*/
-/**
- * Analyse recording with a DC offset.
- */
-static int TestSingleInitialSpike( double sampleRate, int stepPosition, int cycleSize, int latencyFrames, double stepAmplitude )
-{
-    int i;
-    int result = 0;
-    // Account for highpass filter offset.
-    int expectedLatency = latencyFrames + 1;
-    PaQaRecording     recording;
-
-    PaQaRecording     hipassOutput = { 0 };
-    BiquadFilter      hipassFilter;
-
-    PaQaTestTone testTone;
-    PaQaAnalysisResult analysisResult = { 0.0 };
-    int maxFrames = ((int)sampleRate) * 2;
-
-    testTone.samplesPerFrame = 1;
-    testTone.sampleRate = sampleRate;
-    testTone.frequency = sampleRate / cycleSize;
-    testTone.amplitude = -0.5;
-    testTone.startDelay = latencyFrames;
-
-    result = PaQa_InitializeRecording( &recording, maxFrames, (int) sampleRate );
-    QA_ASSERT_EQUALS( "PaQa_InitializeRecording failed", 0, result );
-
-    result = PaQa_InitializeRecording( &hipassOutput, maxFrames, (int) sampleRate );
-    QA_ASSERT_EQUALS( "PaQa_InitializeRecording failed", 0, result );
-
-    MakeCleanRecording( &recording, &testTone );
-
-    // Apply DC step.
-    for( i=stepPosition; i<recording.numFrames; i++ )
-    {
-        recording.buffer[i] += stepAmplitude;
-    }
-
-    // Use high pass as a DC blocker!
-    BiquadFilter_SetupHighPass( &hipassFilter, 10.0 / sampleRate, 0.5 );
-    PaQa_FilterRecording( &recording, &hipassOutput, &hipassFilter );
-
-    testTone.amplitude = 0.5;
-    PaQa_AnalyseRecording( &hipassOutput, &testTone, &analysisResult );
-
-#if PRINT_REPORTS
-    printf("\n=== InitialSpike Analysis ===================\n");
-    printf("                        expected      actual\n");
-    printf("             latency: %10.3f  %10.3f\n", (double)expectedLatency, analysisResult.latency );
-    printf("         popPosition: %10.3f\n", analysisResult.popPosition );
-    printf("        popAmplitude: %10.3f\n", analysisResult.popAmplitude );
-    printf("      amplitudeRatio: %10.3f\n", analysisResult.amplitudeRatio );
-    printf("           cycleSize: %6d\n", cycleSize );
-    printf("    num added frames: %10.3f\n", analysisResult.numAddedFrames );
-    printf("     added frames at: %10.3f\n", analysisResult.addedFramesPosition );
-    printf("  num dropped frames: %10.3f\n", analysisResult.numDroppedFrames );
-    printf("   dropped frames at: %10.3f\n", analysisResult.droppedFramesPosition );
-#endif
-
-    QA_ASSERT_CLOSE( "PaQa_AnalyseRecording latency", expectedLatency, analysisResult.latency, 4.0 );
-    QA_ASSERT_EQUALS( "PaQa_AnalyseRecording no pop from step", -1, (int) analysisResult.popPosition );
-    PaQa_TerminateRecording( &recording );
-    PaQa_TerminateRecording( &hipassOutput );
-    return 0;
-
-error:
-    PaQa_SaveRecordingToWaveFile( &recording, "bad_step_original.wav" );
-    PaQa_SaveRecordingToWaveFile( &hipassOutput, "bad_step_hipass.wav" );
-    PaQa_TerminateRecording( &recording);
-    PaQa_TerminateRecording( &hipassOutput );
-    return 1;
-}
-
-/*==========================================================================================*/
-/**
- * Test various dropped sample scenarios.
- */
-static int TestDetectPops( void )
-{
-    int result;
-
-    // No pop.
-    result = TestDetectSinglePop( 44100, 200, 477, -1, 0, 0.0 );
-    if( result < 0 ) return result;
-
-    // short pop
-    result = TestDetectSinglePop( 44100, 300, 810, 3987, 1, 0.5 );
-    if( result < 0 ) return result;
-
-    // medium long pop
-    result = TestDetectSinglePop( 44100, 300, 810, 9876, 5, 0.5 );
-    if( result < 0 ) return result;
-
-    // short tiny pop
-    result = TestDetectSinglePop( 44100, 250, 810, 5672, 1, 0.05 );
-    if( result < 0 ) return result;
-
-
-    return 0;
-}
-
-/*==========================================================================================*/
-/**
- * Test analysis when there is a DC offset step before the sine signal.
- */
-static int TestInitialSpike( void )
-{
-    int result;
-
-//( double sampleRate, int stepPosition, int cycleSize, int latencyFrames, double stepAmplitude )
-    // No spike.
-    result = TestSingleInitialSpike( 44100, 32, 100, 537, 0.0 );
-    if( result < 0 ) return result;
-
-    // Small spike.
-    result = TestSingleInitialSpike( 44100, 32, 100, 537, 0.1 );
-    if( result < 0 ) return result;
-
-    // short pop like Ross's error.
-    result = TestSingleInitialSpike( 8000, 32, 42, 2000, 0.1 );
-    if( result < 0 ) return result;
-
-    // Medium spike.
-    result = TestSingleInitialSpike( 44100, 40, 190, 3000, 0.5 );
-    if( result < 0 ) return result;
-
-    // Spike near sine.
-    //result = TestSingleInitialSpike( 44100, 2900, 140, 3000, 0.1 );
-    if( result < 0 ) return result;
-
-
-    return 0;
-}
-
-
-#if TEST_SAVED_WAVE
-/*==========================================================================================*/
-/**
- * Simple test that writes a sawtooth waveform to a file.
- */
-static int TestSavedWave()
-{
-    int i,j;
-    WAV_Writer writer;
-    int result = 0;
-#define NUM_SAMPLES  (200)
-    short data[NUM_SAMPLES];
-    short saw = 0;
-
-
-    result =  Audio_WAV_OpenWriter( &writer, "test_sawtooth.wav", 44100, 1 );
-    if( result < 0 ) goto error;
-
-    for( i=0; i<15; i++ )
-    {
-        for( j=0; j<NUM_SAMPLES; j++ )
-        {
-            data[j] = saw;
-            saw += 293;
-        }
-        result =  Audio_WAV_WriteShorts( &writer, data, NUM_SAMPLES );
-        if( result < 0 ) goto error;
-    }
-
-    result =  Audio_WAV_CloseWriter( &writer );
-    if( result < 0 ) goto error;
-
-
-    return 0;
-
-error:
-    printf("ERROR: result = %d\n", result );
-    return result;
-}
-#endif /* TEST_SAVED_WAVE */
-
-/*==========================================================================================*/
-/**
- * Easy way to generate a sine tone recording.
- */
-void PaQa_FillWithSine( PaQaRecording *recording, double sampleRate, double freq, double amp )
-{
-    PaQaSineGenerator generator;
-    float buffer[FRAMES_PER_BLOCK];
-    int samplesPerFrame = 1;
-    int stride = 1;
-    int done = 0;
-
-    // Setup a sine oscillator.
-    PaQa_SetupSineGenerator( &generator, freq, amp, sampleRate );
-
-    done = 0;
-    while (!done)
-    {
-        PaQa_EraseBuffer( buffer, FRAMES_PER_BLOCK, samplesPerFrame );
-        PaQa_MixSine( &generator, buffer, FRAMES_PER_BLOCK, stride );
-        done = PaQa_WriteRecording( recording, buffer, FRAMES_PER_BLOCK, samplesPerFrame );
-    }
-
-}
-
-/*==========================================================================================*/
-/**
- * Generate a tone then knock it out using a filter.
- * Also check using filter slightly off tune to see if some energy gets through.
- */
-static int TestNotchFilter( void )
-{
-    int result = 0;
-    PaQaRecording     original = { 0 };
-    PaQaRecording     filtered = { 0 };
-    BiquadFilter      notchFilter;
-    double sampleRate = 44100.0;
-    int maxFrames = ((int)sampleRate) * 1;
-
-    double freq = 234.5;
-    double amp = 0.5;
-
-    double mag1, mag2, mag3;
-
-    result = PaQa_InitializeRecording( &original, maxFrames, (int) sampleRate );
-    QA_ASSERT_EQUALS( "PaQa_InitializeRecording failed", 0, result );
-
-    PaQa_FillWithSine( &original, sampleRate, freq, amp );
-
-    //result = PaQa_SaveRecordingToWaveFile( &original, "original.wav" );
-    //QA_ASSERT_EQUALS( "PaQa_SaveRecordingToWaveFile failed", 0, result );
-
-    mag1 = PaQa_CorrelateSine( &original, freq, sampleRate, 0, original.numFrames, NULL );
-    QA_ASSERT_CLOSE( "exact frequency match", amp, mag1, 0.01 );
-
-    // Filter with exact frequency.
-    result = PaQa_InitializeRecording( &filtered, maxFrames, (int) sampleRate );
-    QA_ASSERT_EQUALS( "PaQa_InitializeRecording failed", 0, result );
-
-    BiquadFilter_SetupNotch( &notchFilter, freq / sampleRate, 0.5 );
-    PaQa_FilterRecording( &original, &filtered, &notchFilter );
-    result = PaQa_SaveRecordingToWaveFile( &filtered, "filtered1.wav" );
-    QA_ASSERT_EQUALS( "PaQa_SaveRecordingToWaveFile failed", 0, result );
-
-    mag2 = PaQa_CorrelateSine( &filtered, freq, sampleRate, 0, filtered.numFrames, NULL );
-    QA_ASSERT_CLOSE( "should eliminate tone", 0.0, mag2, 0.01 );
-
-    // Filter with mismatched frequency.
-    BiquadFilter_SetupNotch( &notchFilter, 1.07 * freq / sampleRate, 2.0 );
-    PaQa_FilterRecording( &original, &filtered, &notchFilter );
-
-    //result = PaQa_SaveRecordingToWaveFile( &filtered, "badfiltered.wav" );
-    //QA_ASSERT_EQUALS( "PaQa_SaveRecordingToWaveFile failed", 0, result );
-
-    mag3 = PaQa_CorrelateSine( &filtered, freq, sampleRate, 0, filtered.numFrames, NULL );
-    QA_ASSERT_CLOSE( "should eliminate tone", amp*0.26, mag3, 0.01 );
-
-
-    PaQa_TerminateRecording( &original );
-    PaQa_TerminateRecording( &filtered );
-    return 0;
-
-error:
-    PaQa_TerminateRecording( &original);
-    PaQa_TerminateRecording( &filtered );
-    return 1;
-
-}
-
-/*==========================================================================================*/
-/**
- */
-int PaQa_TestAnalyzer( void )
-{
-    int result;
-
-#if TEST_SAVED_WAVE
-    // Write a simple wave file.
-    if ((result = TestSavedWave()) != 0) return result;
-#endif /* TEST_SAVED_WAVE */
-
-    // Generate single tone and verify presence.
-    if ((result = TestSingleMonoTone()) != 0) return result;
-
-    // Generate prime series of tones and verify presence.
-    if ((result = TestMixedMonoTones()) != 0) return result;
-
-    // Detect dropped or added samples in a sine wave recording.
-    if ((result = TestDetectPhaseErrors()) != 0) return result;
-
-    // Test to see if notch filter can knock out the test tone.
-    if ((result = TestNotchFilter()) != 0) return result;
-
-    // Detect pops that get back in phase.
-    if ((result = TestDetectPops()) != 0) return result;
-
-    // Test to see if the latency detector can be tricked like it was on Ross' Windows machine.
-    if ((result = TestInitialSpike()) != 0) return result;
-
-
-    return 0;
-}
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