/// <summary>
/// Initializes a new instance of AudioContent.
/// </summary>
/// <param name="audioFileName">Name of the audio source file to be processed.</param>
/// <param name="audioFileType">Type of the processed audio: WAV, MP3 or WMA.</param>
/// <remarks>Constructs the object from the specified source file, in the format specified.</remarks>
public AudioContent(string audioFileName, AudioFileType audioFileType)
{
_fileName = audioFileName;
try
{
// Get the full path to the file.
audioFileName = Path.GetFullPath(audioFileName);
// Use probe to get the details of the file.
DefaultAudioProfile.ProbeFormat(audioFileName, out _fileType, out _format, out _duration, out _loopStart, out _loopLength);
// Looks like XNA only cares about type mismatch when
// the type is WAV... else it is ok.
if ((audioFileType == AudioFileType.Wav || _fileType == AudioFileType.Wav) &&
audioFileType != _fileType)
{
throw new ArgumentException("Incorrect file type!", "audioFileType");
}
// Only provide the data for WAV files.
if (audioFileType == AudioFileType.Wav)
{
byte[] rawData;
// Must be opened in read mode otherwise it fails to open
// read-only files (found in some source control systems)
using (var fs = new FileStream(_fileName, FileMode.Open, FileAccess.Read))
{
rawData = new byte[fs.Length];
fs.Read(rawData, 0, rawData.Length);
}
AudioFormat riffAudioFormat;
var stripped = DefaultAudioProfile.StripRiffWaveHeader(rawData, out riffAudioFormat);
if (riffAudioFormat != null)
{
if (_format.BlockAlign != riffAudioFormat.BlockAlign)
{
throw new InvalidOperationException("Calcualted block align does not match RIFF " + _format.BlockAlign + " : " + riffAudioFormat.BlockAlign);
}
if (_format.ChannelCount != riffAudioFormat.ChannelCount || _format.Format != riffAudioFormat.Format ||
_format.SampleRate != riffAudioFormat.SampleRate || _format.AverageBytesPerSecond != riffAudioFormat.AverageBytesPerSecond)
{
throw new InvalidOperationException("Probed audio format does not match RIFF");
}
}
_data = Array.AsReadOnly(stripped);
}
}
catch (Exception ex)
{
var message = string.Format("Failed to open file {0}. Ensure the file is a valid audio file and is not DRM protected.", Path.GetFileNameWithoutExtension(audioFileName));
throw new InvalidContentException(message, ex);
}
}
public void ConvertFormat(ConversionFormat formatType, ConversionQuality quality, string saveToFile)
{
// Call the legacy conversion code.
DefaultAudioProfile.ConvertToFormat(this, formatType, quality, saveToFile);
}
