private void ParseSubchunks(Stream input, RiffChunk chunk, long size)
{
var num = input.Position + size;
while (num - input.Position > 8L)
{
RiffChunk chunk1;
ParseChunk(input, out chunk1);
chunk.AddSubchunk(chunk1);
}
input.Position = num;
}
private static void WriteChunk(RiffChunk chunk, Stream stream)
{
var binaryWriter = new BinaryWriter(stream);
binaryWriter.Write(Encoding.ASCII.GetBytes(chunk.Id));
binaryWriter.Write((uint)chunk.Size);
binaryWriter.Write(chunk.Data);
foreach (var chunk1 in chunk.Subchunks)
{
WriteChunk(chunk1, stream);
}
if (chunk.Size % 2L == 0L)
{
return;
}
binaryWriter.Write((byte)0);
}
private void ParseFormatChunk(RiffChunk chunk)
{
var binaryReader = new BinaryReader(new MemoryStream(chunk.Data));
FormatTag = binaryReader.ReadUInt16();
Channels = binaryReader.ReadUInt16();
SamplesPerSec = binaryReader.ReadUInt32();
AvgBytesPerSec = binaryReader.ReadUInt32();
BlockAlign = binaryReader.ReadUInt16();
if (binaryReader.BaseStream.Length - binaryReader.BaseStream.Position > 0L)
{
BitsPerSample = binaryReader.ReadUInt16();
}
if (binaryReader.BaseStream.Length - binaryReader.BaseStream.Position > 0L)
{
int count = binaryReader.ReadUInt16();
FormatExtension = binaryReader.ReadBytes(count);
}
binaryReader.Close();
}
private void UpdateFormatChunk(RiffChunk chunk)
{
using (var memoryStream = new MemoryStream(22))
{
var binaryWriter = new BinaryWriter(memoryStream);
binaryWriter.Write(FormatTag);
binaryWriter.Write(Channels);
binaryWriter.Write(SamplesPerSec);
binaryWriter.Write(AvgBytesPerSec);
binaryWriter.Write(BlockAlign);
binaryWriter.Write(BitsPerSample);
if (FormatExtension != null)
{
binaryWriter.Write((ushort)FormatExtension.Length);
binaryWriter.Write(FormatExtension);
}
else
{
binaryWriter.Write((ushort)0);
}
chunk.Data = memoryStream.ToArray();
}
}
public void RemoveSubchunk(RiffChunk subchunk)
{
_subchunks.Remove(subchunk);
}
public void InsertSubchunk(RiffChunk subchunk, int index)
{
_subchunks.Insert(index, subchunk);
}
public void AddSubchunk(RiffChunk subchunk)
{
_subchunks.Add(subchunk);
}
private void UpdateDataChunk(RiffChunk chunk)
{
chunk.Data = AudioData;
}
private void ParseDataChunk(RiffChunk chunk)
{
AudioData = chunk.Data;
}
