public void Initialize(Stream stream, AudioInfo audioInfo, MetadataDictionary metadata, SettingsDictionary settings)
{
Contract.Ensures(_stream != null);
Contract.Ensures(_stream == stream);
Contract.Ensures(_metadata != null);
Contract.Ensures(_metadata == metadata);
Contract.Ensures(_settings != null);
Contract.Ensures(_settings == settings);
Contract.Ensures(_audioFile != null);
_stream = stream;
_multiplier = (float)Math.Pow(2, audioInfo.BitsPerSample - 1);
_metadata = metadata;
_settings = settings;
AudioStreamBasicDescription inputDescription = GetInputDescription(audioInfo);
AudioStreamBasicDescription outputDescription = GetOutputDescription(inputDescription);
try
{
_audioFile = new NativeExtendedAudioFile(outputDescription, AudioFileType.M4A, stream);
ExtendedAudioFileStatus status = _audioFile.SetProperty(ExtendedAudioFilePropertyId.ClientDataFormat,
inputDescription);
if (status != ExtendedAudioFileStatus.Ok)
{
throw new IOException(string.Format(CultureInfo.CurrentCulture,
Resources.SampleEncoderInitializationError, status));
}
}
catch (TypeInitializationException e)
{
if (e.InnerException != null && e.InnerException.GetType() == typeof(ExtensionInitializationException))
{
throw e.InnerException;
}
throw;
}
}
public void Initialize(Stream stream, AudioInfo audioInfo, MetadataDictionary metadata, SettingsDictionary settings)
{
Contract.Ensures(_stream != null);
Contract.Ensures(_stream == stream);
Contract.Ensures(_metadata != null);
Contract.Ensures(_metadata == metadata);
Contract.Ensures(_settings != null);
Contract.Ensures(_settings == settings);
Contract.Ensures(_audioFile != null);
_stream = stream;
_metadata = metadata;
_settings = settings;
// Load the external gain filter:
ExportFactory <ISampleFilter> sampleFilterFactory =
ExtensionProvider.GetFactories <ISampleFilter>("Name", "ReplayGain").SingleOrDefault();
if (sampleFilterFactory == null)
{
throw new ExtensionInitializationException(Resources.AacSampleEncoderReplayGainFilterError);
}
_replayGainFilterLifetime = sampleFilterFactory.CreateExport();
_replayGainFilterLifetime.Value.Initialize(metadata, settings);
AudioStreamBasicDescription inputDescription = GetInputDescription(audioInfo);
AudioStreamBasicDescription outputDescription = GetOutputDescription(inputDescription);
try
{
_audioFile = new NativeExtendedAudioFile(outputDescription, AudioFileType.M4A, stream);
ExtendedAudioFileStatus status = _audioFile.SetProperty(ExtendedAudioFilePropertyId.ClientDataFormat,
inputDescription);
if (status != ExtendedAudioFileStatus.Ok)
{
throw new IOException(string.Format(CultureInfo.CurrentCulture,
Resources.SampleEncoderInitializationError, status));
}
// Configure the audio converter:
ConfigureConverter(settings, audioInfo.Channels,
_audioFile.GetProperty <IntPtr>(ExtendedAudioFilePropertyId.AudioConverter));
// Setting the ConverterConfig property to null resynchronizes the converter settings:
ExtendedAudioFileStatus fileStatus = _audioFile.SetProperty(
ExtendedAudioFilePropertyId.ConverterConfig, IntPtr.Zero);
if (fileStatus != ExtendedAudioFileStatus.Ok)
{
throw new IOException(string.Format(CultureInfo.CurrentCulture,
Resources.SampleEncoderConverterError, status));
}
}
catch (TypeInitializationException e)
{
if (e.InnerException != null && e.InnerException.GetType() == typeof(ExtensionInitializationException))
{
throw e.InnerException;
}
throw;
}
}
