public static SamplerChunk readStream(BinaryReader br)
{
var ns = new SamplerChunk()
{
manufacturer = br.ReadInt32(),
product = br.ReadInt32(),
period = br.ReadInt32(),
unityNote = br.ReadInt32(),
pitchFracton = br.ReadInt32(),
smtpeFormat = br.ReadInt32(),
smtpeOffset = br.ReadInt32(),
sampleLoopsCount = br.ReadInt32(),
samplerData = br.ReadInt32()
};
ns.loops = new SampleLoop[ns.sampleLoopsCount];
for (int i = 0; i < ns.sampleLoopsCount; i++)
{
ns.loops[i] = SampleLoop.readStream(br);
}
return(ns);
}
public static PCM16WAV readStream(BinaryReader br)
{
// Check for RIFF magic
if (br.ReadUInt32() != 0x46464952u)
{
return(null);
}
int riff_chunck_size = br.ReadInt32();
// Check for WAVE format
if (br.ReadUInt32() != 0x45564157u)
{
return(null);
}
// Find + load format chunk
var wavHAnch = br.BaseStream.Position;
var fmtOfs = findChunk(br, FORMAT); // Locate format chunk
if (fmtOfs < 0)
{
return(null); // format chunk wasn't found. Abort.
}
br.BaseStream.Position = fmtOfs;
// Format chunk (see variable names)
var NewWave = new PCM16WAV()
{
chunkSize = br.ReadInt32(),
format = br.ReadInt16(),
channels = br.ReadInt16(),
sampleRate = br.ReadInt32(),
byteRate = br.ReadInt32(),
blockAlign = br.ReadInt16(),
bitsPerSample = br.ReadInt16()
};
// Find + load PCM16 buffer chunk
br.BaseStream.Position = wavHAnch; // Seek back to section anchor (first section magic)
var datOfs = findChunk(br, DATA); // locate data chunk
if (datOfs < 0) // no PCM buffer chunk, abort.
{
return(null);
}
var datSize = br.ReadInt32(); // section size.
NewWave.sampleCount = datSize / NewWave.blockAlign; // calculate sample count (data length / block alignment)
NewWave.buffer = new short[NewWave.sampleCount * NewWave.channels]; // initialize PCM buffer array
for (int i = 0; i < NewWave.sampleCount * NewWave.channels; i++)
{
NewWave.buffer[i] = br.ReadInt16(); // sprawl out samples into array
}
br.BaseStream.Position = wavHAnch; // Seek back to section anchor (first section magic)
// Load cue points (optional)
var cueOfs = findChunk(br, CUE); // Locate "cue " chunk
if (cueOfs > 0)
{
var cueLength = br.ReadInt32(); // Reading just to align. (Section size)
var cueCount = br.ReadInt32();
NewWave.cuePoints = new WAVCuePoint[cueCount]; // initialize array with length
for (int i = 0; i < cueCount; i++)
{
NewWave.cuePoints[i] = WAVCuePoint.readStream(br); // read individual points into array
}
}
br.BaseStream.Position = wavHAnch;
var smplOfs = findChunk(br, SMPL); //
if (smplOfs > 0)
{
var smplSize = br.ReadInt32();
NewWave.sampler = SamplerChunk.readStream(br);
}
return(NewWave);
}
