//fmtChunk ReadFormatHeader() - 2004 July 28
//Again, not much to say.
public fmtChunk ReadFormatHeader()
{
format = new fmtChunk();
format.sChunkID = "fmt ";
format.dwChunkSize = reader.ReadUInt32();
format.wFormatTag = reader.ReadUInt16();
format.wChannels = reader.ReadUInt16();
format.dwSamplesPerSec = reader.ReadUInt32();
format.dwAvgBytesPerSec = reader.ReadUInt32();
format.wBlockAlign = reader.ReadUInt16();
format.dwBitsPerSample = reader.ReadUInt32();
return(format);
}
//fmtChunk ReadFormatHeader() - 2004 July 28
//Again, not much to say.
public fmtChunk ReadFormatHeader()
{
format = new fmtChunk();
format.sChunkID = "fmt ";
int pos = 0;
format.dwChunkSize = reader.ReadUInt32();
format.wFormatTag = reader.ReadUInt16();
pos += 2;
format.wChannels = reader.ReadUInt16();
pos += 2;
format.dwSamplesPerSec = reader.ReadUInt32();
pos += 4;
format.dwAvgBytesPerSec = reader.ReadUInt32();
pos += 4;
format.wBlockAlign = reader.ReadUInt16();
pos += 2;
if (pos + 4 <= format.dwChunkSize)
{
format.dwBitsPerSample = reader.ReadUInt32();
pos += 4;
}
else
{
format.dwBitsPerSample = 8 * format.dwAvgBytesPerSec / format.dwSamplesPerSec;
}
while (pos < format.dwChunkSize)
{
reader.ReadByte();
pos++;
}
return(format);
}
public WaveFile(string filename)
{
reader = new WaveFileReader(filename);
maindata = reader.ReadMainFileHeader();
maindata.FileName = filename;
long chunkSize = 0;
string chunkName = null;
while (chunkName != "data" && reader.GetPosition() < (long)maindata.dwFileLength && reader.GetPosition() + chunkSize < maindata.dwFileLength)
{
chunkName = reader.GetChunkName();
switch (chunkName)
{
case "fmt ":
format = reader.ReadFormatHeader();
chunkSize = format.dwChunkSize;
break;
case "fact":
fact = reader.ReadFactHeader();
chunkSize = fact.dwChunkSize;
break;
case "data":
data = reader.ReadDataHeader();
chunkSize = data.dwChunkSize;
break;
default:
//This provides the required skipping of unsupported chunks.
// reader.AdvanceToNext();
chunkSize = 0;
break;
}
}
}
