static void EncodeStreamAdpcm(MicrosoftWaveMixer mixer, aBinaryWriter writer)
{
var left_adpcm4 = new byte[9];
int left_last = 0, left_penult = 0;
var right_adpcm4 = new byte[9];
int right_last = 0, right_penult = 0;
var left = new short[16];
var right = new short[16];
for (var i = 0; i < mixer.SampleCount; i += 16)
{
for (var j = 0; j < 16; ++j)
{
if ((i + j) < mixer.SampleCount)
{
mixer.ReadPcm16((i + j), out left[j], out right[j]);
}
else
{
left[j] = 0;
right[j] = 0;
}
}
Waveform.Pcm16toAdpcm4(left, left_adpcm4, ref left_last, ref left_penult);
Waveform.Pcm16toAdpcm4(right, right_adpcm4, ref right_last, ref right_penult);
writer.Write8s(left_adpcm4);
writer.Write8s(right_adpcm4);
if ((i % cMessageInterval) == 0 || (i + 16) >= mixer.SampleCount)
{
mareep.WriteMessage("\rSamples encoded: {0}/{1}", System.Math.Min((i + 16), mixer.SampleCount), mixer.SampleCount);
}
}
}