public Encode(string[] files, IDspTool dllA, IDspTool dllB, Func <IAudioReader> reader)
{
Files = files;
DllA = dllA;
DllB = dllB;
GetReader = reader;
}
private static Result CompareEncodingFine(short[] pcm, IDspTool dllA, IDspTool dllB)
{
short[] coefsA = dllA.DspCorrelateCoefs(pcm);
short[] coefsB = dllB.DspCorrelateCoefs(pcm);
int coefsEqual = ArraysEqual(coefsA, coefsB);
if (coefsEqual != -1)
{
return(new Result
{
Equal = false,
CoefsEqual = false,
RanFineComparison = true,
CoefsA = coefsA,
CoefsB = coefsB
});
}
int sampleCount = pcm.Length;
var adpcmA = new byte[SampleCountToByteCount(sampleCount)];
var adpcmB = new byte[SampleCountToByteCount(sampleCount)];
/* Execute encoding-predictor for each frame */
var pcmBufferA = new short[2 + SamplesPerFrame];
var pcmBufferB = new short[2 + SamplesPerFrame];
var adpcmBufferA = new byte[BytesPerFrame];
var adpcmBufferB = new byte[BytesPerFrame];
int frameCount = DivideByRoundUp(sampleCount, SamplesPerFrame);
for (int frame = 0; frame < frameCount; frame++)
{
int samplesToCopy = Math.Min(sampleCount - frame * SamplesPerFrame, SamplesPerFrame);
Array.Copy(pcm, frame * SamplesPerFrame, pcmBufferA, 2, samplesToCopy);
Array.Copy(pcm, frame * SamplesPerFrame, pcmBufferB, 2, samplesToCopy);
Array.Clear(pcmBufferA, 2 + samplesToCopy, SamplesPerFrame - samplesToCopy);
Array.Clear(pcmBufferB, 2 + samplesToCopy, SamplesPerFrame - samplesToCopy);
dllA.DspEncodeFrame(pcmBufferA, SamplesPerFrame, adpcmBufferA, coefsA);
dllB.DspEncodeFrame(pcmBufferB, SamplesPerFrame, adpcmBufferB, coefsB);
int encodeEqual = ArraysEqual(adpcmBufferA, adpcmBufferB);
if (encodeEqual != -1)
{
int differentSample = ArraysEqual(pcmBufferA, pcmBufferB) - 2;
//Get the input PCM that resulted in different encodings
var history = new short[2 + SamplesPerFrame];
Array.Copy(pcm, frame * SamplesPerFrame, history, 2, samplesToCopy);
Array.Copy(pcmBufferA, 0, history, 0, 2);
var pcmA = new short[SamplesPerFrame];
var pcmB = new short[SamplesPerFrame];
Array.Copy(pcmBufferA, 2, pcmA, 0, samplesToCopy);
Array.Copy(pcmBufferB, 2, pcmB, 0, samplesToCopy);
return(new Result
{
Equal = false,
CoefsEqual = true,
RanFineComparison = true,
CoefsA = coefsA,
CoefsB = coefsB,
Frame = frame,
FrameSample = differentSample,
Sample = frame * SamplesPerFrame + differentSample,
PcmIn = history,
PcmOutA = pcmA,
PcmOutB = pcmB,
AdpcmOutA = adpcmBufferA,
AdpcmOutB = adpcmBufferB
});
}
Array.Copy(adpcmBufferA, 0, adpcmA, frame * BytesPerFrame, SampleCountToByteCount(samplesToCopy));
Array.Copy(adpcmBufferB, 0, adpcmB, frame * BytesPerFrame, SampleCountToByteCount(samplesToCopy));
pcmBufferA[0] = pcmBufferA[14];
pcmBufferA[1] = pcmBufferA[15];
pcmBufferB[0] = pcmBufferB[14];
pcmBufferB[1] = pcmBufferB[15];
}
return(new Result {
Equal = true, RanFineComparison = true
});
}
