private ArrayHandleFloat LoadSampleHelper(
ChannelType channel,
string type,
string name)
{
if (!String.Equals(type, String.Empty) &&
!String.Equals(type, "WAV") &&
!String.Equals(type, "AIFF"))
{
throw new EvalErrorException(EvalErrors.eEvalUnableToImportFile);
}
// SECURITY: ensure navigation to user-provided path does not escape from the permitted root directories
string path = null;
if (mainWindow.SavePath != null)
{
string path2;
if (SecurePathCombine(Path.GetDirectoryName(mainWindow.SavePath), name, out path2) &&
File.Exists(path2))
{
path = path2;
}
}
if (path == null)
{
string path2;
if (SecurePathCombine(Program.GetSettingsDirectory(false /*create*/, true /*roaming*/), name, out path2) &&
File.Exists(path2))
{
path = path2;
}
}
if (path == null)
{
throw new EvalErrorException(EvalErrors.eEvalUnableToImportFile);
}
ArrayHandleFloat array = null;
try
{
using (Stream stream = new FileStream(path, FileMode.Open, FileAccess.Read, FileShare.Read, Constants.BufferSize))
{
using (AudioFileReader reader = Program.TryGetAudioReader(stream))
{
if (reader == null)
{
throw new NullReferenceException(); // neither AIFF nor WAV
}
if ((reader.NumChannels == NumChannelsType.eSampleMono)
!= (channel == ChannelType.eMonoChannel))
{
throw new ArgumentException(); // file does not have specified channel
}
array = new ArrayHandleFloat(new float[reader.NumFrames]);
float[] buffer = new float[4096];
int c;
int p = 0;
while ((c = reader.ReadPoints(buffer, 0, buffer.Length)) != 0)
{
switch (channel)
{
default:
Debug.Assert(false);
throw new ArgumentException();
case ChannelType.eLeftChannel:
for (int i = 0; i < c; i += 2)
{
array.floats[p++] = buffer[i + 0];
}
break;
case ChannelType.eRightChannel:
for (int i = 0; i < c; i += 2)
{
array.floats[p++] = buffer[i + 1];
}
break;
case ChannelType.eMonoChannel:
for (int i = 0; i < c; i++)
{
array.floats[p++] = buffer[i];
}
break;
}
}
}
}
}
catch (Exception)
{
throw new EvalErrorException(EvalErrors.eEvalUnableToImportFile);
}
return(array);
}
public AudioFilePlayGeneratorParams(
AudioFileReader reader)
{
this.reader = reader;
}