public RIFFFormatChunk ReadFormatChunk()
{
fFormat = new RIFFFormatChunk();
fFormat.chunkID = FOURCC.fmt;
fFormat.dwChunkSize = fReader.ReadUInt32();
fFormat.wFormatTag = fReader.ReadUInt16();
fFormat.wChannels = fReader.ReadUInt16();
fFormat.dwSamplesPerSec = fReader.ReadUInt32();
fFormat.dwAvgBytesPerSec = fReader.ReadUInt32();
fFormat.wBlockAlign = fReader.ReadUInt16();
// If the wFormatTag indicates WAVE_FORMAT_PCM
// Then the following bitsPerSample is read in as 16 bits
if ((ushort)WAVEFORMAT.WAVE_FORMAT_PCM == fFormat.wFormatTag)
fFormat.dwBitsPerSample = fReader.ReadUInt16();
return fFormat;
}
public WaveFile(string filename)
{
fFileName = filename;
RIFFStreamReader fReader = new RIFFStreamReader(filename);
fBinaryReader = fReader.BinaryReader;
fHeader = fReader.ReadHeader();
// Read the chunks from the file
uint chunkName = 0;
while (fReader.Position < (long) fHeader.dwFileLength)
{
chunkName = fReader.ReadFourCC();
switch (chunkName)
{
case FOURCC.fmt:
fFormat = fReader.ReadFormatChunk();
if (fReader.Position + fFormat.dwChunkSize == fHeader.dwFileLength)
return;
break;
case FOURCC.fact:
fFact = fReader.ReadFactChunk();
if (fReader.Position + fFact.dwChunkSize == fHeader.dwFileLength)
return;
break;
case FOURCC.data:
fData = fReader.ReadDataChunk();
if (fReader.Position + fData.dwChunkSize == fHeader.dwFileLength)
return;
break;
default:
// Skip over unsupported chunks.
fReader.AdvanceToNext();
break;
}
}
}
public RIFFStreamReader(Stream inStream)
{
fFact = null;
fFormat = null;
fReader = new BinaryReader(inStream);
}
