// Conversion routine overload
// (madlldlib)
//
// Convert() routine overload for
// MP3 decoding using madlldlib.
// Expects 'inputFile' to be MP3.
//
// Note: Calling this method in
// your code requires you to
// release your code under GPL
// terms. See the readme.txt
// file in this distribution
// for details.
public void Convert(string inputFile, string outputFile,
soundFormat convertTo, MadlldlibWrapper.Callback updateStatus)
{
// Handle incorrect output types
if ( !(convertTo == soundFormat.WAV) &&
!(convertTo == soundFormat.RAW) )
{
throw new Exception(
"Cannot convert from MP3 to this format directly: " +
convertTo);
}
// Check that file is MP3
// Search through .5 of file
// before quitting
MP3Check verifyMP3 = new MP3Check(inputFile, 2);
if (!verifyMP3.Check())
{
throw new Exception("Not a valid MP3 file: " +
inputFile);
}
// Convert to short pathnames
inputFilePath.Capacity = MAX_STRLEN;
outputFilePath.Capacity = MAX_STRLEN;
GetShortPathName(inputFile, inputFilePath, MAX_STRLEN);
GetShortPathName(outputFile, outputFilePath, MAX_STRLEN);
// Assign if returned path is not zero:
if (inputFilePath.Length > 0)
inputFile = inputFilePath.ToString();
if (outputFilePath.Length > 0)
outputFile = outputFilePath.ToString();
// status/error message reporting.
// String length must be set
// explicitly
StringBuilder status = new StringBuilder();
status.Capacity=256;
// call the decoding function
if (convertTo == soundFormat.WAV)
{
MadlldlibWrapper.DecodeMP3(inputFile, outputFile,
MadlldlibWrapper.DEC_WAV, status, updateStatus);
}
else
// Convert to PCM (raw):
{
MadlldlibWrapper.DecodeMP3(inputFile, outputFile,
MadlldlibWrapper.DEC_PCM, status, updateStatus);
}
// this prevents garbage collection
// from occurring on callback
GC.KeepAlive(updateStatus);
}
private bool ReportStatusMad(uint frameCount, uint byteCount, ref MadlldlibWrapper.mad_header mh)
{
SetControlPropertyValue(progressBar1, "value", (int)(((float)byteCount / (float)soundFileSize) * 100));
return true;
}