/// <summary>Begins the decoding process.</summary>
/// <param name="source">The source.</param>
/// <exception cref="NotSupportedException">Only Layer 3 Audio is supported!.</exception>
/// <exception cref="Exception">Decoding already started!.</exception>
public override void BeginDecode(IFrameSource source)
{
if (m_FrameDecoder != null)
{
Close();
}
SourceName = source.Name;
m_Source = source;
// get first audio frame
MP3AudioFrame l_MP3Frame = ReadNextAudioFrame();
if (l_MP3Frame.Header.Layer != MP3AudioFrameLayer.Layer3)
{
throw new NotSupportedException("Source " + SourceName + ": Only Layer 3 Audio is supported!");
}
// prepare decoder
m_OutputChannels = l_MP3Frame.Header.ChannelCount;
float[] isEqualizerFactors = m_Equalizer.GetFactors();
m_Filter1 = new MP3AudioSynthesisFilter(0, 32000.0f, isEqualizerFactors);
if (m_OutputChannels == 2)
{
m_Filter2 = new MP3AudioSynthesisFilter(1, 32000.0f, isEqualizerFactors);
}
m_SamplingRate = l_MP3Frame.Header.SamplingRate;
m_OutputBuffer = new MP3AudioStereoBuffer(m_SamplingRate);
m_FrameDecoder = new MP3AudioLayerIIIDecoder(l_MP3Frame.Header, m_Filter1, m_Filter2, m_OutputBuffer, (int)MP3AudioOutputMode.Both);
DecodeFrame(l_MP3Frame);
}
/// <summary>Closes this instance and the underlying stream.</summary>
public override void Close()
{
m_FrameDecoder = null;
m_Source.Close();
}
/// <summary>Closes this instance and the underlying stream.</summary>
public override void Close()
{
frameDecoder = null;
source.Close();
}
