void PerformWavToStream(Stream instream, Stream outstream)
{
var mixer = new MicrosoftWaveMixer(instream);
var writer = new aBinaryWriter(outstream, Endianness.Big);
var dataSize = 0;
switch (mStreamFormat)
{
case StreamFormat.Pcm: dataSize = (mixer.SampleCount * 4); break;
case StreamFormat.Adpcm: dataSize = (mareep.RoundUp16B(mixer.SampleCount) / 16 * 18); break;
}
writer.WriteS32(dataSize);
writer.WriteS32(mixer.SampleCount);
writer.Write16((ushort)mixer.SampleRate);
writer.Write16((ushort)mStreamFormat);
writer.Write16(0); // unused
writer.Write16((ushort)mStreamFrameRate);
writer.WriteS32(mStreamLoop ? 1 : 0); // loop flag
writer.WriteS32(mStreamLoop ? mStreamLoopStart : 0); // loop start
writer.WritePadding(32, 0);
switch (mStreamFormat)
{
case StreamFormat.Pcm: EncodeStreamPcm(mixer, writer); break;
case StreamFormat.Adpcm: EncodeStreamAdpcm(mixer, writer); break;
}
writer.WritePadding(32, 0);
}
void PerformWavToRaw(Stream instream, Stream outstream)
{
var mixer = new MicrosoftWaveMixer(instream);
var writer = new aBinaryWriter(outstream, Endianness.Big);
mixer.MixerMode = mMixerMode;
mixer.Write(mRawOutputFormat, writer);
}
static void EncodeStreamPcm(MicrosoftWaveMixer mixer, aBinaryWriter writer)
{
short left, right;
for (var i = 0; i < mixer.SampleCount; ++i)
{
mixer.ReadPcm16(i, out left, out right);
writer.WriteS16(left);
writer.WriteS16(right);
if ((i % cMessageInterval) == 0 || i >= mixer.SampleCount)
{
mareep.WriteMessage("\rSamples encoded: {0}/{1}", System.Math.Min((i + 1), mixer.SampleCount), mixer.SampleCount);
}
}
}
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);
}
}
}
