static long GetRiffValue(FileStream fs, string chunk, string offset)
{
long ret = DEFAULT_LOOP_VALUE;
// riff values
RiffCalculatingOffsetDescription riffCalculatingOffset = new RiffCalculatingOffsetDescription();
riffCalculatingOffset.RelativeLocationToRiffChunkString = RiffCalculatingOffsetDescription.START_OF_STRING;
riffCalculatingOffset.OffsetSize = "4";
riffCalculatingOffset.OffsetByteOrder = Constants.LittleEndianByteOrder;
try
{
riffCalculatingOffset.RiffChunkString = chunk;
riffCalculatingOffset.OffsetValue = offset;
ret = ParseFile.GetRiffCalculatedVaryingByteValueAtAbsoluteOffset(fs, riffCalculatingOffset, true);
}
catch (IndexOutOfRangeException iorEx)
{
// Console.WriteLine(String.Format("Error processing RIFF item for <{0}>: {1}", Path.GetFileName(fs.Name), iorEx.Message));
}
return(ret);
}
public new RiffCalculatingOffsetDescription GetOffsetValues()
{
RiffCalculatingOffsetDescription allValues = new RiffCalculatingOffsetDescription();
allValues.OffsetValue = this.tbOffset.Text;
allValues.OffsetSize = this.comboSize.Text;
allValues.OffsetByteOrder = this.comboByteOrder.Text;
allValues.CalculationString = this.tbCalculation.Text;
allValues.RelativeLocationToRiffChunkString = this.cbRiffRelativeLocation.Text;
allValues.RiffChunkString = this.cbRiffChunkList.Text;
return(allValues);
}
public static long GetSampleCountForRiffHeaderedFile(string path)
{
long sampleCount = -1;
ushort channelCount;
uint dataSize;
RiffCalculatingOffsetDescription riffValue = new RiffCalculatingOffsetDescription();
// get values from file
using (FileStream fs = File.OpenRead(path))
{
// over kill, but i don't feel like recoding it
riffValue.CalculationString = String.Empty;
riffValue.OffsetByteOrder = Constants.LittleEndianByteOrder;
riffValue.OffsetSize = "2";
riffValue.OffsetValue = "10";
riffValue.RelativeLocationToRiffChunkString = RiffCalculatingOffsetDescription.START_OF_STRING;
riffValue.RiffChunkString = "fmt ";
channelCount = (ushort)ParseFile.GetRiffCalculatedVaryingByteValueAtAbsoluteOffset(fs, riffValue, true);
riffValue.CalculationString = String.Empty;
riffValue.OffsetByteOrder = Constants.LittleEndianByteOrder;
riffValue.OffsetSize = "4";
riffValue.OffsetValue = "4";
riffValue.RelativeLocationToRiffChunkString = RiffCalculatingOffsetDescription.START_OF_STRING;
riffValue.RiffChunkString = "data";
dataSize = (uint)ParseFile.GetRiffCalculatedVaryingByteValueAtAbsoluteOffset(fs, riffValue, true);
sampleCount = (long)dataSize / 2 / (long)channelCount;
} // using (FileStream fs = File.OpenRead(path))
return(sampleCount);
}