private MipMap ReadMipMapHeader(BinaryReader reader)
{
var mipMap = new MipMap();
mipMap.DivisionFactor = reader.ReadInt32(); // number of samples per peak
int numberOfPeakSamples = reader.ReadInt32();
mipMap.Peaks = new PeakValues[numberOfPeakSamples];
return(mipMap);
}
private void ReadMipMapData(BinaryReader reader, MipMap mipMap)
{
for (int n = 0; n < mipMap.Peaks.Length; n++)
{
mipMap.Peaks[n] = new PeakValues(Channels);
for (int ch = 0; ch < Channels; ch++)
{
mipMap.Peaks[n].Channels[ch].Max = reader.ReadInt16();
if (magicHeader == "RPKN") // 1.1
{
mipMap.Peaks[n].Channels[ch].Min = reader.ReadInt16();
}
else // 1.0, mirror the positive peak
{
mipMap.Peaks[n].Channels[ch].Min = (short)(0 - mipMap.Peaks[n].Channels[ch].Max);
}
}
}
}
public MipMap GetPeaks(string fileName, int samplesPerPeak)
{
if (fileName.EndsWith(".ReaPeaks", StringComparison.CurrentCultureIgnoreCase))
{
var reaPeaks = new ReaPeaksFileReader(fileName);
return(reaPeaks.MipMaps[1]);
}
MipMap m = new MipMap();
m.DivisionFactor = samplesPerPeak;
List <PeakValues> peaks = new List <PeakValues>();
using (var reader = GetReader(fileName))
{
int channels = reader.WaveFormat.Channels;
int stepSize = samplesPerPeak * channels * (reader.WaveFormat.BitsPerSample / 8);
WaveBuffer buffer = new WaveBuffer(stepSize);
int read;
while ((read = reader.Read(buffer.ByteBuffer, 0, stepSize)) > 0)
{
PeakValues peakValues = new PeakValues(reader.WaveFormat.Channels);
int samples = read / 2; // assume 16 bit
for (int index = 0; index < samples; index++)
{
int ch = index % channels;
peakValues.Channels[ch].Max = Math.Max(peakValues.Channels[ch].Max, buffer.ShortBuffer[index]);
peakValues.Channels[ch].Min = Math.Min(peakValues.Channels[ch].Min, buffer.ShortBuffer[index]);
}
peaks.Add(peakValues);
}
}
m.Peaks = peaks.ToArray();
return(m);
}