public unsafe override void Write(ProcessedAudio input, ContentStream writer, WriterContext ctx)
{
try
{
writer.Write(input.FrameCount);
writer.Write(input.SampleRate);
writer.Write(input.Stereo);
writer.Write(false); // true = lossy, false = lossless
byte * data = (byte *)input.Data.ToPointer();
RLADAudio rlad = input as RLADAudio;
uint lmod = input.Stereo ? 2u : 1;
uint len = 0;
for (uint ci = 0; ci < rlad.ChunkCount; ++ci, data += len)
{
var stype = rlad.Chunks[ci].Type;
var extra = rlad.Chunks[ci].Extra;
var head = ((stype & 0x03) << 6) | (extra & 0x3F);
writer.Write((byte)(head & 0xFF));
// First calculate the length assuming one chunk of mono data, then correct for stereo and chunk count
len = (stype == RLADAudio.SMALL_TYPE) ? 8u : (stype == RLADAudio.MED_TYPE) ? 12u : 16u;
len *= (lmod * (extra + 1u));
writer.Write(data, len);
}
}
finally
{
input.Dispose();
}
}
public unsafe override ProcessedAudio Process(RawAudio input, ProcessorContext ctx)
{
// Preprocessing step for mp3, convert from float to s16
if (input.Format == AudioFormat.Mp3)
{
ConvertF32ToS16((short *)input.Data.ToPointer(), (float *)input.Data.ToPointer(), input.SampleCount);
}
// Perform the compression steps
try
{
var proc = RLADAudio.Encode(input, ctx.UseStats, ctx.Logger);
return(proc);
}
finally
{
input.Dispose(); // Wont do anything if the encoding functions work properly
}
}