static IEnumerable<ComparisonAgregator> CompareBySamples(WaveReader originalReader, WaveReader compressedReader, long compressedSamplesToSkip)
{
var comparisonAgregator = new ComparisonAgregator ("All samples", 0);
EnumerateBySamples (originalReader, compressedReader, compressedSamplesToSkip, comparisonAgregator.DetermineEquilization);
EnumerateBySamples (originalReader, compressedReader, compressedSamplesToSkip, comparisonAgregator.CompareSamples);
comparisonAgregator.WriteResults ();
yield return comparisonAgregator;
}
static IEnumerable<ComparisonAgregator> CompareByFrequencies(WaveReader originalReader, WaveReader compressedReader, float samplingRate, int numChannels, long compressedSamplesToSkip)
{
var minWindowSize = samplingRate / 16;
int windowSize;
var windowSizeCtr = 0;
do
{
windowSizeCtr++;
windowSize = Convert.ToInt32(Math.Pow(2, windowSizeCtr));
} while (windowSize <= minWindowSize);
var samplesPerCheck = minWindowSize / 2;
var comparisonAgregators = new Dictionary<int, ComparisonAgregator>();
for (var ctr = 1; ctr < windowSize / 2; ctr++)
{
var lowerFrequency = (ctr - 1) * samplingRate / windowSize;
var frequency = ctr * samplingRate / windowSize;
if (frequency >= 16)
comparisonAgregators[ctr - 1] = new ComparisonAgregator(lowerFrequency.ToString() + "hz", lowerFrequency);
}
comparisonAgregators[windowSize / 2] = new ComparisonAgregator((samplingRate / 2).ToString() + "hz", samplingRate / 2);
var equilizationMethods = new Dictionary<int, Action<float[], float[]>>();
foreach (var kvp in comparisonAgregators)
equilizationMethods[kvp.Key] = kvp.Value.DetermineEquilization;
EnumerateByFrequencies (originalReader, compressedReader, numChannels, windowSize, samplesPerCheck, equilizationMethods, compressedSamplesToSkip);
var comparisonMethods = new Dictionary<int, Action<float[], float[]>>();
foreach (var kvp in comparisonAgregators)
comparisonMethods[kvp.Key] = kvp.Value.CompareSamples;
EnumerateByFrequencies (originalReader, compressedReader, numChannels, windowSize, samplesPerCheck, comparisonMethods, compressedSamplesToSkip);
foreach (var compressionAgregator in comparisonAgregators.OrderBy(kvp => kvp.Key).Select(kvp => kvp.Value))
compressionAgregator.WriteResults();
return comparisonAgregators.Values;
}
static IEnumerable<ComparisonAgregator> CompareByFrequencyBands(WaveReader originalReader, WaveReader compressedReader, long compressedSamplesToSkip)
{
var highComparisonAgregator = new ComparisonAgregator ("High Frequencies: > 6khz", 0);
var midComparisonAgregator = new ComparisonAgregator ("Mid Frequencies: < 6khz, > 3khz", 1);
var lowComparisonAgregator = new ComparisonAgregator ("Low Frequencies: < 3khz", 2);
EnumerateByFrequencyBands (
originalReader,
compressedReader,
compressedSamplesToSkip,
highComparisonAgregator.DetermineEquilization,
midComparisonAgregator.DetermineEquilization,
lowComparisonAgregator.DetermineEquilization);
EnumerateByFrequencyBands (
originalReader,
compressedReader,
compressedSamplesToSkip,
highComparisonAgregator.CompareSamples,
midComparisonAgregator.CompareSamples,
lowComparisonAgregator.CompareSamples);
lowComparisonAgregator.WriteResults ();
midComparisonAgregator.WriteResults ();
highComparisonAgregator.WriteResults ();
yield return lowComparisonAgregator;
yield return midComparisonAgregator;
yield return highComparisonAgregator;
}