/// <summary>
/// Read the RIFF.
/// </summary>
/// <param name="r">The reader.</param>
public override void Read(FileReader r)
{
//Init.
using (RiffReader rr = new RiffReader(r.BaseStream)) {
//Format.
rr.OpenChunk(rr.Chunks.Where(x => x.Magic.Equals("fmt ")).FirstOrDefault());
if (rr.ReadUInt16() != 1)
{
throw new Exception("Unexpected standard WAV data format.");
}
int numChannels = rr.ReadUInt16();
SampleRate = rr.ReadUInt32();
rr.ReadUInt32(); //Byte rate.
rr.ReadUInt16(); //Blocks.
ushort bitsPerSample = rr.ReadUInt16();
LoopStart = 0;
LoopEnd = 0;
Loops = false;
if (bitsPerSample != 8 && bitsPerSample != 16)
{
throw new Exception("This tool only accepts 8-bit or 16-bit WAV files.");
}
//Sample.
var smpl = rr.Chunks.Where(x => x.Magic.Equals("smpl")).FirstOrDefault();
if (smpl != null)
{
rr.OpenChunk(smpl);
rr.ReadUInt32s(7);
Loops = rr.ReadUInt32() > 0;
if (Loops)
{
rr.ReadUInt32s(3);
LoopStart = r.ReadUInt32(); //(uint)(r.ReadUInt32() / (bitsPerSample / 8));
LoopEnd = r.ReadUInt32(); //(uint)(r.ReadUInt32() / (bitsPerSample / 8));
}
}
//Data.
rr.OpenChunk(rr.Chunks.Where(x => x.Magic.Equals("data")).FirstOrDefault());
uint dataSize = rr.Chunks.Where(x => x.Magic.Equals("data")).FirstOrDefault().Size;
uint numBlocks = (uint)(dataSize / numChannels / (bitsPerSample / 8));
r.Position = rr.Position;
Audio.Read(r, bitsPerSample == 16 ? typeof(PCM16) : typeof(PCM8), numChannels, numBlocks, (uint)bitsPerSample / 8, 1, (uint)bitsPerSample / 8, 1, 0);
Audio.ChangeBlockSize(-1);
}
}
