public WaveFmtChunk Decode(IRiffChunk chunk)
{
var data = chunk.Data;
return(new WaveFmtChunk
{
Format = Bitter.ToInt16(data, 0),
Channels = Bitter.ToInt16(data, 2),
SampleRate = Bitter.ToInt32(data, 4),
ByteRate = Bitter.ToInt32(data, 8),
BlockAlign = Bitter.ToInt16(data, 12),
BitsPerSample = Bitter.ToInt16(data, 14),
ExtraData = data.Length > 16 ? data.AsSpan(16).ToArray() : new byte[0]
});
}
public IRiffFormat Decode(IRiffChunk chunk)
{
using (var stream = new ReadOnlyMemoryStream(chunk.Data))
using (var reader = new BinaryReader(stream))
{
return(new RiffFormat
{
Format = reader.ReadInt16(),
Channels = reader.ReadInt16(),
SampleRate = reader.ReadInt32(),
ByteRate = reader.ReadInt32(),
BlockAlign = reader.ReadInt16(),
BitsPerSample = reader.ReadInt16(),
ExtraData = reader.ReadBytes(chunk.Data.Length - 16)
});
}
}
public RiffWaveFormat(ushort audioFormat = 1, ushort numChannels = 2, uint sampleRate = 44100, ushort bitsPerSample = 16, uint numSamples = 0)
{
var dataChunkSize = numSamples * numChannels * bitsPerSample / 8;
RiffChunk = new RiffDescriptorChunk(RiffFormat.WAVE);
FormatSubchunk = new RiffWaveFormatSubchunk(audioFormat, numChannels, sampleRate, bitsPerSample);
DataSubchunk = new RiffWaveDataSubchunk(dataChunkSize);
Chunks = new IRiffChunk[]
{
RiffChunk,
FormatSubchunk,
DataSubchunk,
};
var fileLength = (uint)Chunks.Sum(m =>
{
return(m.ChunkID.Length + m.ChunkSize.Length + m.Data.Length);
});
RiffChunk.FileLength = fileLength;
}
