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mdfourier.c
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/*
* MDFourier
* A Fourier Transform analysis tool to compare game console audio
* http://junkerhq.net/MDFourier/
*
* Copyright (C)2019-2020 Artemio Urbina
*
* This file is part of the 240p Test Suite
*
* You can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This software is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this software; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* Requires the FFTW library:
* http://www.fftw.org/
*
*/
#include "mdfourier.h"
#include "log.h"
#include "cline.h"
#include "windows.h"
#include "freq.h"
#include "diff.h"
#include "plot.h"
#include "sync.h"
#include "balance.h"
#include "loadfile.h"
#include "profile.h"
int LoadAndProcessAudioFiles(AudioSignal **ReferenceSignal, AudioSignal **ComparisonSignal, parameters *config);
int ProcessSignal(AudioSignal *Signal, parameters *config);
int ExecuteDFFT(AudioBlocks *AudioArray, double *samples, size_t size, double samplerate, double *window, int AudioChannels, int ZeroPad, parameters *config);
int ExecuteDFFTInternal(AudioBlocks *AudioArray, double *samples, size_t size, double samplerate, double *window, char channel, int AudioChannels, int ZeroPad, parameters *config);
int CompareAudioBlocks(AudioSignal *ReferenceSignal, AudioSignal *ComparisonSignal, parameters *config);
int CopySamplesForTimeDomainPlot(AudioBlocks *AudioArray, double *samples, size_t size, size_t diff, double *window, int AudioChannels, int forcecopy, parameters *config);
void CleanUp(AudioSignal **ReferenceSignal, AudioSignal **ComparisonSignal, parameters *config);
void NormalizeTimeDomainByFrequencyRatio(AudioSignal *Signal, double normalizationRatio, parameters *config);
double FindRatio(AudioSignal *Signal, double normalizationRatio, parameters *config);
double FindRatioForBlock(AudioBlocks *AudioArray, double ratio);
void NormalizeBlockByRatio(AudioBlocks *AudioArray, double ratio);
void ProcessWaveformsByBlock(AudioSignal *ReferenceSignal, AudioSignal *ComparisonSignal, double ratioRef, parameters *config);
double FindMaxSampleForWaveform(AudioSignal *Signal, int *block, parameters *config);
double FindMaxSampleInBlock(AudioBlocks *AudioArray);
void FindViewPort(parameters *config);
int ReportClockResults(AudioSignal *ReferenceSignal, AudioSignal *ComparisonSignal, parameters *config);
int RecalculateFrequencyStructures(AudioSignal *ReferenceSignal, AudioSignal *ComparisonSignal, parameters *config);
int NormalizeAndFinishProcess(AudioSignal **ReferenceSignal, AudioSignal **ComparisonSignal, parameters *config);
int FrequencyDomainNormalize(AudioSignal **ReferenceSignal, AudioSignal **ComparisonSignal, parameters *config);
void AdjustTimeDomainData(AudioSignal *ReferenceSignal, AudioSignal *ComparisonSignal, parameters *config);
// Time domain
MaxSample FindMaxSampleAmplitude(AudioSignal *Signal);
void NormalizeAudioByRatio(AudioSignal *Signal, double ratio);
double FindLocalMaximumAroundSample(AudioSignal *Signal, MaxSample refMax);
// Frequency domain
void NormalizeMagnitudesByRatio(AudioSignal *Signal, double ratio, parameters *config);
MaxMagn FindMaxMagnitudeBlock(AudioSignal *Signal, parameters *config);
int FindMultiMaxMagnitudeBlock(AudioSignal *Signal, MaxMagn *MaxMag, int *size, parameters *config);
double FindLocalMaximumInBlock(AudioSignal *Signal, MaxMagn refMax, int allowDifference, parameters *config);
double FindFundamentalMagnitudeAverage(AudioSignal *Signal, parameters *config);
double FindFundamentalMagnitudeStdDev(AudioSignal *Signal, double AvgFundMag, parameters *config);
int main(int argc, char *argv[])
{
AudioSignal *ReferenceSignal = NULL;
AudioSignal *ComparisonSignal = NULL;
parameters config;
struct timespec start, end;
if(!Header(0, argc, argv))
return 1;
if(!commandline(argc, argv, &config))
{
printf(" -h: Shows command line help\n");
CleanUp(&ReferenceSignal, &ComparisonSignal, &config);
return 1;
}
clock_gettime(CLOCK_MONOTONIC, &start);
if(!SetupFolders(config.outputFolder, "Log", &config))
{
logmsg("Aborting\n");
CleanUp(&ReferenceSignal, &ComparisonSignal, &config);
return 1;
}
if(!EndProfileLoad(&config))
{
logmsg("Aborting\n");
CleanUp(&ReferenceSignal, &ComparisonSignal, &config);
return 1;
}
if(strcmp(config.referenceFile, config.comparisonFile) == 0)
{
CleanUp(&ReferenceSignal, &ComparisonSignal, &config);
logmsg("Both inputs are the same file %s, skipping to save time\n",
config.referenceFile);
return 1;
}
if(!LoadAndProcessAudioFiles(&ReferenceSignal, &ComparisonSignal, &config))
{
logmsg("Aborting\n");
if(config.debugSync)
printf("\nResults stored in %s%s\n",
config.outputPath,
config.folderName);
CleanUp(&ReferenceSignal, &ComparisonSignal, &config);
return 1;
}
if(!ReportClockResults(ReferenceSignal, ComparisonSignal, &config))
{
if(config.doClkAdjust)
{
if(!RecalculateFrequencyStructures(ReferenceSignal, ComparisonSignal, &config))
{
logmsg("Could not recalculate frequencies, Aborting\n");
return 1;
}
}
}
AdjustTimeDomainData(ReferenceSignal, ComparisonSignal, &config);
logmsg("\n* Comparing frequencies: ");
if(!CompareAudioBlocks(ReferenceSignal, ComparisonSignal, &config))
{
logmsg("Aborting\n");
CleanUp(&ReferenceSignal, &ComparisonSignal, &config);
return 1;
}
config.averageDifference = FindDifferenceAverage(&config);
logmsg("Average difference is %g dB\n", config.averageDifference);
if(config.substractAveragePlot)
{
config.averageDifferenceOrig = config.averageDifference;
SubstractDifferenceAverageFromResults(&config);
config.averageDifference = FindDifferenceAverage(&config);
logmsg(" - Adjusted plots around average, the new average is %g dB\n", config.averageDifference);
}
FindViewPort(&config);
logmsg("* Plotting results to PNGs:\n");
PlotResults(ReferenceSignal, ComparisonSignal, &config);
if(IsLogEnabled())
endLog();
/* Clear up everything */
ReleaseDifferenceArray(&config);
CleanUp(&ReferenceSignal, &ComparisonSignal, &config);
fftw_cleanup();
//if(config.clock)
{
int minutes = 0;
double elapsedSeconds;
clock_gettime(CLOCK_MONOTONIC, &end);
elapsedSeconds = TimeSpecToSeconds(&end) - TimeSpecToSeconds(&start);
minutes = elapsedSeconds / 60.0;
logmsg("* MDFourier Analysis took %0.2f seconds", elapsedSeconds);
if(minutes)
logmsg(" (%d minute%s %0.2f seconds)", minutes, minutes == 1 ? "" : "s", elapsedSeconds - minutes*60);
logmsg("\n");
}
printf("\nResults stored in %s%s\n",
config.outputPath,
config.folderName);
return(0);
}
void FindViewPort(parameters *config)
{
int type = 0;
char *name = NULL;
double outside = 0, maxDiff = 0;
outside = FindDifferencePercentOutsideViewPort(&maxDiff, &type, fabs(config->maxDbPlotZC), config);
if(outside)
{
name = GetTypeDisplayName(config, type);
if(config->maxDbPlotZCChanged)
{
config->notVisible = outside;
logmsg("- Not auto adjusting vertical, using requested +/-%gdB. Missing [%s]: %g%%\n",
config->maxDbPlotZC, name, outside);
return;
}
logmsg(" - Differences outside +/-%gdB in [%s]: %g%%\n",
config->maxDbPlotZC, name, outside);
if(outside > PCNT_VISIBLE_WRN && outside < PCNT_VISIBLE_ACT)
{
config->notVisible = outside;
logmsg(" - If needed you can graph them all with \"-d %g\" for this particular case\n\n", ceil(maxDiff));
return;
}
if(outside >= PCNT_VISIBLE_ACT && !config->maxDbPlotZCChanged) // if the user has not changed it
{
double value = 0;
value = ceil(FindVisibleInViewPortWithinStandardDeviation(&maxDiff, &outside, type, 1, config));
if(value != -1 && outside < 5)
config->maxDbPlotZC = value;
else
{
value = ceil(FindVisibleInViewPortWithinStandardDeviation(&maxDiff, &outside, type, 2, config));
if(value != -1)
config->maxDbPlotZC = value;
// swap above for this to expand auto expand fully if needed
/*
value = ceil(FindVisibleInViewPortWithinStandardDeviation(&maxDiff, &outside, type, 2, config));
if(value != -1 && outside < 5)
config->maxDbPlotZC = value;
else
{
config->maxDbPlotZC = ceil(maxDiff);
outside = FindDifferencePercentOutsideViewPort(&maxDiff, &type, fabs(config->maxDbPlotZC), config);
}
*/
}
logmsg(" - Auto adjusting viewport to %gdB for graphs\n", config->maxDbPlotZC);
if(outside >= 1)
logmsg(" - The %g%% of differences in [%s] will not be visible within the %gdB for graphs\n - If needed you can graph them all with \"-d %g\" for this particular case\n\n",
outside, name, config->maxDbPlotZC, ceil(maxDiff));
#ifdef DEBUG
logmsg("WARNING: Viewport auto adjusted\n");
#endif
}
}
else
logmsg("\n");
config->notVisible = outside;
}
void PrintSignalCLKData(AudioSignal *Signal, parameters *config)
{
if(Signal->EstimatedSR)
{
if(!config->doSamplerateAdjust)
logmsg(", WARNING: %s sample rate estimated at %gHz from signal length (can be auto matched with -R)",
Signal->role == ROLE_REF ? "Reference" : "Comparison",
Signal->EstimatedSR);
else
{
if(Signal->originalSR)
{
if(Signal->EstimatedSR != (int)Signal->EstimatedSR)
logmsg(" [Sample rate adjusted %dHz->%0.4fHz with -R]",
Signal->originalSR, Signal->EstimatedSR);
else
logmsg(" [Sample rate adjusted %dHz->%dHz with -R]",
Signal->originalSR, (int)Signal->EstimatedSR);
}
}
}
logmsg("\n");
if(config->clkWarning & Signal->role)
logmsg("WARNING: %s has noise or higher harmonics than the fundamental in the clock block.\n",
Signal->role == ROLE_REF ? "Reference" : "Comparison");
if(config->clkNotFound & Signal->role)
logmsg("WARNING: %s clock frequency not found within tolerance. Using highest value.\n",
Signal->role == ROLE_REF ? "Reference" : "Comparison");
}
int ReportClockResults(AudioSignal *ReferenceSignal, AudioSignal *ComparisonSignal, parameters *config)
{
double refClk = 0, compClk = 0;
if(!config->clkMeasure)
return 1;
if(!CalculateCLKAmplitudes(ReferenceSignal, ComparisonSignal, config)) {
logmsg("\n* WARNING: %s Clocks based on expected %d Hz on note %s# %d could not be calculated\n",
config->clkName, config->clkFreq, GetBlockName(config, config->clkBlock),
GetBlockSubIndex(config, config->clkBlock));
return 0;
}
refClk = CalculateClk(ReferenceSignal, config);
compClk = CalculateClk(ComparisonSignal, config);
config->clkRef = refClk;
config->clkCom = compClk;
logmsg("\n* Estimated %s Clocks based on expected %d Hz on note %s# %d:\n",
config->clkName, config->clkFreq, GetBlockName(config, config->clkBlock),
GetBlockSubIndex(config, config->clkBlock));
logmsg(" - Reference: %gHz", refClk);
PrintSignalCLKData(ReferenceSignal, config);
logmsg(" - Comparison: %gHz", compClk);
PrintSignalCLKData(ComparisonSignal, config);
config->centsDifferenceCLK = 1200*log2(refClk/compClk);
if(fabs(config->centsDifferenceCLK) >= MIN_CENTS_DIFF)
{
logmsg(" - Pitch difference in cents: %g\n", config->centsDifferenceCLK);
if(!config->doClkAdjust)
{
/*
int reportOption = 0;
if(config->RefCentsDifferenceSR || config->ComCentsDifferenceSR)
{
double diff = 0;
if(config->RefCentsDifferenceSR)
diff = fabs(config->RefCentsDifferenceSR - config->centsDifferenceCLK);
else
diff = fabs(config->ComCentsDifferenceSR - config->centsDifferenceCLK);
if(diff >= 5) // Same issue between both, reported above
reportOption = 1;
else if(diff >= 1)
reportOption = 1;
}
else
reportOption = 1;
config->diffClkNoMatch = 1;
if(reportOption)
*/
logmsg(" - WARNING: Clocks don't match, results may vary considerably. Can adjust with -j\n");
}
return 0;
}
else
{
if(config->doClkAdjust)
logmsg(" - WARNING: Ignoring -j since pitch difference in cents is: %g\n", config->centsDifferenceCLK);
}
return 1;
}
int LoadAudioFiles(AudioSignal **ReferenceSignal, AudioSignal **ComparisonSignal, parameters *config)
{
AudioSignal *higher = NULL;
if(!LoadFile(ReferenceSignal, config->referenceFile, ROLE_REF, config))
return 0;
if(!LoadFile(ComparisonSignal, config->comparisonFile, ROLE_COMP, config))
return 0;
if(GetSignalMaxInt(*ReferenceSignal) >= GetSignalMaxInt(*ComparisonSignal))
higher = *ReferenceSignal;
else
higher= *ComparisonSignal;
config->highestValueBitDepth = GetSignalMaxInt(higher);
config->lowestValueBitDepth = GetSignalMinInt(higher);
config->lowestDBFS = GetSignalMinDBFS(higher);
return 1;
}
/* Although dithering would be better, there has been no need */
/* Tested a file scaled with ths method against itself using */
/* the frequency domain solution, and differences are negligible */
/* (less than 0.2dBFS) */
int TimeDomainNormalize(AudioSignal **ReferenceSignal, AudioSignal **ComparisonSignal, parameters *config)
{
MaxSample MaxRef, MaxTar;
double ComparisonLocalMaximum = 0;
double ratioTar = 0, ratioRef = 0;
// Find Normalization factors
MaxRef = FindMaxSampleAmplitude(*ReferenceSignal);
if(!MaxRef.maxSample)
{
logmsg("ERROR: Could not detect Max amplitude in 'Reference' File for normalization\n");
return 0;
}
MaxTar = FindMaxSampleAmplitude(*ComparisonSignal);
if(!MaxTar.maxSample)
{
logmsg("ERROR: Could not detect Max amplitude in 'Comparison' file for normalization\n");
return 0;
}
ratioTar = config->highestValueBitDepth/MaxTar.maxSample;
NormalizeAudioByRatio(*ComparisonSignal, ratioTar);
ComparisonLocalMaximum = FindLocalMaximumAroundSample(*ComparisonSignal, MaxRef);
if(!ComparisonLocalMaximum)
{
logmsg("ERROR: Could not detect Max amplitude in 'Comparison' file for normalization\n");
return 0;
}
ratioRef = (ComparisonLocalMaximum/MaxRef.maxSample);
if(config->verbose) { logmsg(" - Sample ratio is %g\n", ratioRef); }
NormalizeAudioByRatio(*ReferenceSignal, ratioRef);
// Uncomment if you want to check the WAV files as normalized
//SaveWAVEChunk(NULL, *ReferenceSignal, (*ReferenceSignal)->Samples, 0, (*ReferenceSignal)->numSamples, config);
//SaveWAVEChunk(NULL, *ComparisonSignal, (*ComparisonSignal)->Samples, 0, (*ComparisonSignal)->numSamples, config);
return 1;
}
/* The default */
int FrequencyDomainNormalize(AudioSignal **ReferenceSignal, AudioSignal **ComparisonSignal, parameters *config)
{
MaxMagn MaxRef, MaxTar;
double ComparisonLocalMaximum = 0;
double ratioRef = 0, ratiodBFS = 0;
double RefAvg = 0;
double CompAvg = 0;
double ratio = 0, maxRatiodBFS = fabs(FREQDOMRATIO);
// Find Normalization factors
MaxRef = FindMaxMagnitudeBlock(*ReferenceSignal, config);
if(!MaxRef.magnitude)
{
logmsg("ERROR: Could not detect Max amplitude in 'Reference' File for normalization\n");
return 0;
}
MaxTar = FindMaxMagnitudeBlock(*ComparisonSignal, config);
if(!MaxTar.magnitude)
{
logmsg("ERROR: Could not detect Max amplitude in 'Comparison' file for normalization\n");
return 0;
}
ComparisonLocalMaximum = FindLocalMaximumInBlock(*ComparisonSignal, MaxRef, 0, config);
if(ComparisonLocalMaximum)
ratioRef = ComparisonLocalMaximum/MaxRef.magnitude;
/* Detect extreme cases, and try another approach */
ratiodBFS = CalculateAmplitudeInternal(ComparisonLocalMaximum, MaxRef.magnitude);
if(!config->allowStereoVsMono &&
MaxRef.block == MaxTar.block &&
MaxRef.channel != MaxTar.channel &&
fabs(ratiodBFS) > STEREO_TOLERANCE_REPORT)
{
logmsg(" - WARNING: Left and right channels might be reversed or converted from mono to stereo");
if(config->verbose)
logmsg(" %g/%g", fabs(ratiodBFS), STEREO_TOLERANCE_REPORT);
logmsg("\n");
config->warningStereoReversed = 1;
}
if(config->verbose) { logmsg(" - Amplitude ratio is %gdB\n", ratiodBFS == NO_AMPLITUDE ? 0 : ratiodBFS); }
if(ComparisonLocalMaximum == 0 || fabs(ratiodBFS) > maxRatiodBFS || ratiodBFS == NO_AMPLITUDE)
{
int found = 0, pos = 1, allowDifference = 0, tries = 0, numMatches = FREQDOMTRIES;
MaxMagn MaxRefArray[FREQDOMTRIES];
double ComparisonLocalMaximumArray = 0, ratioRefArray = 0;
if(config->verbose) { logmsg(" - Searching for lower ratio alternatives\n"); }
memset(MaxRefArray, 0, sizeof(MaxRefArray));
if(FindMultiMaxMagnitudeBlock(*ReferenceSignal, MaxRefArray, &numMatches, config))
{
int matchIndex = -1;
double lowestRatio = 0, ComparisonLocalMaximumArrayforLowest = 0, localRatiodBFS = ratiodBFS;
// We have a do for a second cycle allowing tolerance
do
{
while(MaxRefArray[pos].magnitude != 0 && pos < numMatches)
{
if(config->verbose >= 2) {
logmsg(" - Reference Max Magnitude[%d] found in %s# %d (%d) at %g Hz with %g\n",
pos,
GetBlockName(config, MaxRefArray[pos].block), GetBlockSubIndex(config, MaxRefArray[pos].block),
MaxRefArray[pos].block, MaxRefArray[pos].hertz, MaxRefArray[pos].magnitude);
}
ratioRefArray = 0;
ComparisonLocalMaximumArray = FindLocalMaximumInBlock(*ComparisonSignal, MaxRefArray[pos], allowDifference, config);
if(ComparisonLocalMaximumArray)
{
double dbfsratioArray = 0;
dbfsratioArray = CalculateAmplitudeInternal(ComparisonLocalMaximumArray, MaxRefArray[pos].magnitude);
ratioRefArray = ComparisonLocalMaximumArray/MaxRefArray[pos].magnitude;
if(dbfsratioArray > localRatiodBFS)
{
localRatiodBFS = dbfsratioArray;
lowestRatio = ratioRefArray;
ComparisonLocalMaximumArrayforLowest = ComparisonLocalMaximumArray;
matchIndex = pos;
}
if(config->verbose >= 2) { logmsg(" - Comparision ratio is %gdB\n", dbfsratioArray); }
if(fabs(dbfsratioArray) <= fabs(FREQDOMRATIO)) {
found = 1;
break;
}
}
pos++;
}
if(localRatiodBFS > ratiodBFS)
{
found = 1;
ComparisonLocalMaximumArray = ComparisonLocalMaximumArrayforLowest;
ratioRefArray = lowestRatio;
pos = matchIndex;
if(config->verbose) {
logmsg(" - Reference Max Magnitude[%d] lowest match %s# %d (%d) at %g Hz with %g\n",
pos,
GetBlockName(config, MaxRefArray[pos].block), GetBlockSubIndex(config, MaxRefArray[pos].block),
MaxRefArray[pos].block, MaxRefArray[pos].hertz, MaxRefArray[pos].magnitude);
}
}
if(found){
int copy = 0;
if(ComparisonLocalMaximum) // we are here because no clean match was found
copy = 1;
else /* we are here because of ratio */ {
if(ratioRefArray < ratioRef)
copy = 1;
if(!ratioRef)
copy = 1;
}
if(copy){
ComparisonLocalMaximum = ComparisonLocalMaximumArray;
ratioRef = ratioRefArray;
config->frequencyNormalizationTries = pos + 1;
}
else {
if(config->verbose) { logmsg(" - Alternative matches were worse than original, (%g<-%g)reverting\n", ratioRefArray, ratioRef); }
}
}
else {
config->frequencyNormalizationTries = -1;
allowDifference = 1;
pos = 0;
}
tries ++;
}while(tries == 1 && allowDifference == 1);
}
#ifdef DEBUG
if(found)
logmsg("WARNING: Frequency Domain Normalization at %d value\n", config->frequencyNormalizationTries);
#endif
}
else
config->frequencyNormalizationTries = 0;
if(!ComparisonLocalMaximum || !ratioRef)
{
logmsg("ERROR: Could not detect Local Maximum in 'Comparison' file for normalization\n");
logmsg("\t* Use Time Domain normalization: -n t\n");
logmsgFileOnly("ComparisonLocalMaximum %g ratioRef %g\n", ComparisonLocalMaximum, ratioRef);
PrintFrequenciesWMagnitudes(*ReferenceSignal, config);
PrintFrequenciesWMagnitudes(*ComparisonSignal, config);
return 0;
}
NormalizeMagnitudesByRatio(*ReferenceSignal, ratioRef, config);
RefAvg = FindFundamentalMagnitudeAverage(*ReferenceSignal, config);
CompAvg = FindFundamentalMagnitudeAverage(*ComparisonSignal, config);
if(RefAvg > CompAvg)
ratio = RefAvg/CompAvg;
else
ratio = CompAvg/RefAvg;
if(fabs(ratio) > fabs(FREQDOMRATIO)) {
//double dbfsratioArray = 0;
//dbfsratioArray = CalculateAmplitude(ComparisonLocalMaximum, MaxRef.magnitude);
logmsg("\tWARNING: Average frequency difference after normalization between the signals is too high. (Ratio:%g to 1)\n", ratio);
logmsg("\tIf results make no sense please try the following in the Extra Commands box:\n");
logmsg("\t* Use Time Domain normalization: -n t\n");
logmsg("\tThis can be caused by: comparing very different signals, a capacitor problem,\n");
logmsg("\tframerate difference causing pitch drifting, an unusual frequency scenario, etc.\n");
config->warningRatioTooHigh = ratio;
}
/* This is just for waveform visualization */
if((config->hasTimeDomain && config->plotTimeDomain) || config->plotAllNotes)
ProcessWaveformsByBlock(*ReferenceSignal, *ComparisonSignal, ratioRef, config);
return 1;
}
int AverageNormalize(AudioSignal **ReferenceSignal, AudioSignal **ComparisonSignal, parameters *config)
{
double RefAvg = 0, CompAvg = 0, ratio = 0;
RefAvg = FindFundamentalMagnitudeAverage(*ReferenceSignal, config);
CompAvg = FindFundamentalMagnitudeAverage(*ComparisonSignal, config);
if(CompAvg > RefAvg)
{
ratio = CompAvg/RefAvg;
NormalizeMagnitudesByRatio(*ReferenceSignal, ratio, config);
/* waveforms */
ProcessWaveformsByBlock(*ReferenceSignal, *ComparisonSignal, ratio, config);
}
else
{
ratio = RefAvg/CompAvg;
NormalizeMagnitudesByRatio(*ComparisonSignal, ratio, config);
/* waveforms */
ProcessWaveformsByBlock(*ComparisonSignal, *ReferenceSignal, ratio, config);
}
return 1;
}
// Compensate time normalization to match frequency normalization
/*
int TimeDomainNormalizeCompensate(AudioSignal **ReferenceSignal, AudioSignal **ComparisonSignal, parameters *config)
{
// Check if we have the same peaks
// This is in order to compensate TimeDomain Differences
// But we probably default to Frequency domain and leave this commented out
if((*ReferenceSignal)->MaxMagnitude.hertz == (*ComparisonSignal)->MaxMagnitude.hertz &&
(*ReferenceSignal)->MaxMagnitude.block == (*ComparisonSignal)->MaxMagnitude.block)
{
double diff = 0;
diff = fabs((*ReferenceSignal)->MaxMagnitude.magnitude - (*ComparisonSignal)->MaxMagnitude.magnitude);
if(diff > 0.5)
{
double ratio = 0;
if((*ReferenceSignal)->MaxMagnitude.magnitude > (*ComparisonSignal)->MaxMagnitude.magnitude)
{
//if(config->verbose)
logmsg(" - Both Peaks match in frequency and Block, readjusting magnitudes");
ratio = (*ComparisonSignal)->MaxMagnitude.magnitude/(*ReferenceSignal)->MaxMagnitude.magnitude;
NormalizeMagnitudesByRatio(*ReferenceSignal, ratio, config);
}
else
{
if(config->verbose)
logmsg(" - Both Peaks match in frequency and Block, readjusting magnitudes");
ratio = (*ReferenceSignal)->MaxMagnitude.magnitude/(*ComparisonSignal)->MaxMagnitude.magnitude;
NormalizeMagnitudesByRatio(*ComparisonSignal, ratio, config);
}
}
//ZeroDbMagnitudeRef = (*ReferenceSignal)->MaxMagnitude.magnitude;
}
return 1;
}
*/
int ProcessNoiseFloor(AudioSignal *ReferenceSignal, AudioSignal *ComparisonSignal, parameters *config)
{
int refHasFloor = 0, comHasFloor = 0;
double avgRef = 0, avgComp = 0;
/* analyze silence floor if available */
if(ReferenceSignal->hasSilenceBlock)
{
FindFloor(ReferenceSignal, config);
refHasFloor = ReferenceSignal->floorAmplitude != 0.0;
}
if(ComparisonSignal->hasSilenceBlock)
{
FindFloor(ComparisonSignal, config);
comHasFloor = ComparisonSignal->floorAmplitude != 0.0;
}
avgRef = FindFundamentalAmplitudeAverage(ReferenceSignal, config);
avgComp = FindFundamentalAmplitudeAverage(ComparisonSignal, config);
if(refHasFloor && avgRef < ReferenceSignal->floorAmplitude)
{
config->noiseFloorTooHigh |= ReferenceSignal->role;
logmsg(" - Reference noise floor %g dBFS is louder than the average %g dBFS of the signal, ignoring\n",
ReferenceSignal->floorAmplitude, avgRef);
ReferenceSignal->floorAmplitude = SIGNIFICANT_AMPLITUDE;
}
// Higher noise floor was found, biut low fundamental noise was used
if(config->referenceNoiseFloor > ReferenceSignal->floorAmplitude)
config->noiseFloorTooHigh |= ReferenceSignal->role;
if(comHasFloor && avgComp < ComparisonSignal->floorAmplitude)
{
config->noiseFloorTooHigh |= ComparisonSignal->role;
logmsg(" - Comparison noise floor %g dBFS is louder than the average %g dBFS of the signal, ignoring\n",
ComparisonSignal->floorAmplitude, avgComp);
ComparisonSignal->floorAmplitude = SIGNIFICANT_AMPLITUDE;
}
/* Detect Signal Floor, default to Reference's*/
if(refHasFloor)
config->significantAmplitude = ReferenceSignal->floorAmplitude;
if(refHasFloor && ReferenceSignal->floorAmplitude > HIGHEST_NOISEFLOOR_ALLOWED)
config->noiseFloorTooHigh |= ReferenceSignal->role;
if(comHasFloor && ComparisonSignal->floorAmplitude > HIGHEST_NOISEFLOOR_ALLOWED)
config->noiseFloorTooHigh |= ComparisonSignal->role;
// If comparison is lower than the default and higher than reference, use that
if(config->noiseFloorAutoAdjust)
{
if(refHasFloor && comHasFloor &&
config->significantAmplitude < SIGNIFICANT_AMPLITUDE &&
ComparisonSignal->floorAmplitude <= HIGHEST_NOISEFLOOR_ALLOWED &&
ReferenceSignal->floorAmplitude < ComparisonSignal->floorAmplitude)
{
double diff = 0;
config->significantAmplitude = ComparisonSignal->floorAmplitude;
diff = fabs(ReferenceSignal->floorAmplitude - ComparisonSignal->floorAmplitude);
if(diff > 20)
config->noiseFloorBigDifference = 1;
}
}
else
{
if(config->significantAmplitude < SIGNIFICANT_AMPLITUDE)
{
logmsg(" - Limiting noise floor to %g from %g (from -p 0)\n",
SIGNIFICANT_AMPLITUDE, config->significantAmplitude);
config->significantAmplitude = SIGNIFICANT_AMPLITUDE;
}
}
if(config->significantAmplitude >= HIGHEST_NOISEFLOOR_ALLOWED)
{
logmsg(" - WARNING: Noise floor %g dBFS is louder than the default %g dBFS. If differences are not visible, define a limit with -p <dbfs>\n",
config->significantAmplitude, HIGHEST_NOISEFLOOR_ALLOWED);
//if(!config->noiseFloorTooHigh)
// config->noiseFloorTooHigh = ROLE_COMP;
// we rather not take action for now
//config->significantAmplitude = SIGNIFICANT_VOLUME;
}
/*
// check if digital noise floor, so we limit ourselves to a reasonable noise floor
if(config->significantAmplitude < NOISE_FLOOR_DIGITAL_FAIR)
{
logmsg(" - Found possible digital noise floor at %g dBFS. Limiting to %g dBFS, use -p to override\n",
config->significantAmplitude, NOISE_FLOOR_DIGITAL_FAIR);
config->significantAmplitude = NOISE_FLOOR_DIGITAL_FAIR;
}
else
*/
logmsg(" - Using %g dBFS as minimum significant amplitude for analysis\n", config->significantAmplitude);
if(refHasFloor)
FindNoiseFloorAmplitudeAverage(ReferenceSignal, config);
if(comHasFloor)
FindNoiseFloorAmplitudeAverage(ComparisonSignal, config);
return 1;
}
int LoadAndProcessAudioFiles(AudioSignal **ReferenceSignal, AudioSignal **ComparisonSignal, parameters *config)
{
if(!LoadAudioFiles(ReferenceSignal, ComparisonSignal, config))
return 0;
SelectSilenceProfile(config);
config->referenceFramerate = (*ReferenceSignal)->framerate;
CompareFrameRates(*ReferenceSignal, *ComparisonSignal, config);
/* Balance check */
if(config->channelBalance && !config->noSyncProfile)
{
if((*ReferenceSignal)->AudioChannels == 2 || (*ComparisonSignal)->AudioChannels == 2)
{
int block = NO_INDEX;
char *name = NULL;
if(config->stereoBalanceBlock)
{
block = config->stereoBalanceBlock;
name = GetBlockName(config, block);
if(!name)
{
logmsg("ERROR: Invalid Mono Balance Block %d\n", block);
return 0;
}
}
else
{
block = GetFirstMonoIndex(config);
logmsg("- WARNING: MonoBalanceBlock was 0, Using first Mono Block\n");
}
if(block != NO_INDEX)
{
logmsg("\n* Comparing Stereo channel amplitude\n");
if(config->verbose) {
logmsg(" - Mono block used for balance: %s# %d\n",
name, GetBlockSubIndex(config, block));
}
if(CheckBalance(*ReferenceSignal, block, config) == 0)
return 0;
if(CheckBalance(*ComparisonSignal, block, config) == 0)
return 0;
}
else
{
logmsg(" - WARNING: No mono block for stereo balance check\n");
config->channelBalance = -1;
}
}
}
if(config->normType == max_time)
{
if(!TimeDomainNormalize(ReferenceSignal, ComparisonSignal, config))
return 0;
}
SetAmplitudeMatchByDuration(*ReferenceSignal, config);
logmsg("\n* Executing Discrete Fast Fourier Transforms on 'Reference' file\n");
if(!ProcessSignal(*ReferenceSignal, config))
return 0;
logmsg("* Executing Discrete Fast Fourier Transforms on 'Comparison' file\n");
if(!ProcessSignal(*ComparisonSignal, config))
return 0;
ReleasePCM(*ReferenceSignal);
ReleasePCM(*ComparisonSignal);
CalculateFrequencyBrackets(*ReferenceSignal, config);
CalculateFrequencyBrackets(*ComparisonSignal, config);
if(!NormalizeAndFinishProcess(ReferenceSignal, ComparisonSignal, config))
return 0;
// Display Absolute and independent Noise Floor
/*
if(!config->ignoreFloor)
{
FindStandAloneFloor(*ReferenceSignal, config);
FindStandAloneFloor(*ComparisonSignal, config);
}
*/
if(!config->ignoreFloor)
{
if(!ProcessNoiseFloor(*ReferenceSignal, *ComparisonSignal, config))
return 0;
}
else
logmsg(" - Ignoring Noise floor, using %gdBFS\n", config->significantAmplitude);
return 1;
}
int NormalizeAndFinishProcess(AudioSignal **ReferenceSignal, AudioSignal **ComparisonSignal, parameters *config)
{
double ZeroDbMagnitudeRef = 0;
if(config->normType == max_frequency)
{
if(!FrequencyDomainNormalize(ReferenceSignal, ComparisonSignal, config))
return 0;
}
if(config->normType == average)
{
if(!AverageNormalize(ReferenceSignal, ComparisonSignal, config))
return 0;
}
/*
// Compensate time normalization to match frequency normalization
if(config->normType == max_time)
{
if(!TimeDomainNormalizeCompensate(ReferenceSignal, ComparisonSignal, config))
return 0;
}
*/
logmsg("\n* Processing Signal Frequencies and Amplitudes\n");
if ((*ReferenceSignal)->MaxMagnitude.magnitude < (*ComparisonSignal)->MaxMagnitude.magnitude)
{
ZeroDbMagnitudeRef = (*ComparisonSignal)->MaxMagnitude.magnitude;
if (config->verbose) {
logmsg(" - Comparison file has the highest peak at %g vs %g\n",
ZeroDbMagnitudeRef, (*ReferenceSignal)->MaxMagnitude.magnitude);
}
}
else
{
ZeroDbMagnitudeRef = (*ReferenceSignal)->MaxMagnitude.magnitude;
if (config->verbose) {
logmsg(" - Reference file has the highest peak at %g vs %g\n",
ZeroDbMagnitudeRef, (*ComparisonSignal)->MaxMagnitude.magnitude);
}
}
CalculateAmplitudes(*ReferenceSignal, ZeroDbMagnitudeRef, config);
CalculateAmplitudes(*ComparisonSignal, ZeroDbMagnitudeRef, config);
if(config->verbose)
{
PrintFrequencies(*ReferenceSignal, config);
PrintFrequencies(*ComparisonSignal, config);
}
if(config->types.useWatermark)
{
if(!DetectWatermark(*ReferenceSignal, config))
{
logmsg("ERROR: Reference signal could not be properly evaluated\n");
return 0;
}
if(!DetectWatermark(*ComparisonSignal, config))
{
logmsg("ERROR: Comparison signal could not be properly evaluated\n");
return 0;
}
}
config->referenceSignal = *ReferenceSignal;
config->comparisonSignal = *ComparisonSignal;
return 1;
}
void CleanUp(AudioSignal **ReferenceSignal, AudioSignal **ComparisonSignal, parameters *config)
{
if(*ReferenceSignal)
{
ReleaseAudio(*ReferenceSignal, config);
free(*ReferenceSignal);
*ReferenceSignal = NULL;
}
if(*ComparisonSignal)
{
ReleaseAudio(*ComparisonSignal, config);
free(*ComparisonSignal);
*ComparisonSignal = NULL;
}
ReleaseAudioBlockStructure(config);
}
int CopySamplesForTimeDomainPlotWindowOnly(AudioBlocks *AudioArray, double *window, int AudioChannels, parameters *config)
{
long i = 0, monoSignalSize = 0, difference = 0;
double *signal = NULL, *window_samples = NULL;
if(!AudioArray)
{
logmsg("No Array for results\n");
return 0;
}
if(!config->plotAllNotesWindowed || !window || !config->doClkAdjust)
{
logmsg("Unplanned function call\n");
return 0;
}
if(AudioArray->audio.windowed_samples)
{
logmsg("ERROR: Window waveforms already stored\n");
return 0;
}
if(!AudioArray->audio.samples)
{
logmsg("ERROR: Waveforms not stored\n");
return 0;
}
signal = AudioArray->audio.samples;
monoSignalSize = AudioArray->audio.size;