/// <summary>
///
/// </summary>
/// <param name="format"></param>
/// <returns></returns>
public static StreamInfo FromSoundFormat(SoundFormat format)
{
return(new StreamInfo()
{
Category = StreamCategory.Audio,
Channels = 2, // as of libVLC 2.1 imem accepts only 2 channel audio
Codec = SoundType.f32l,
Samplerate = format.Rate,
Size = 15 * 1024 // need to find a way to estimate audio frame size....
});
}
private int SetupCallback(void** data, char* format, int* rate, int* channels)
{
var pFormat = new IntPtr(format);
var formatStr = Marshal.PtrToStringAnsi(pFormat);
SoundType sType;
if (!Enum.TryParse<SoundType>(formatStr, out sType))
{
var exc = new ArgumentException("Unsupported sound type " + formatStr);
if (_mExcHandler != null)
{
_mExcHandler(exc);
return 1;
}
else
{
throw exc;
}
}
_mFormat = new SoundFormat(sType, *rate, *channels);
if (_mFormatSetupCb != null)
{
_mFormat = _mFormatSetupCb(_mFormat);
}
Marshal.Copy(_mFormat.Format.ToUtf8(), 0, pFormat, 4);
*rate = _mFormat.Rate;
*channels = _mFormat.Channels;
return _mFormat.UseCustomAudioRendering == true ? 0 : 1;
}
public void SetFormat(SoundFormat format)
{
_mFormat = format;
LibVlcMethods.libvlc_audio_set_format(_mHMediaPlayer, _mFormat.Format.ToUtf8(), _mFormat.Rate, _mFormat.Channels);
}
private SoundFormat SoundFormatCallback(SoundFormat sf)
{
if (_needsSetup)
{
_recordingFormat = new WaveFormat(sf.Rate, 16, sf.Channels);
_waveProvider = new BufferedWaveProvider(RecordingFormat);
_sampleChannel = new SampleChannel(_waveProvider);
_meteringProvider = new MeteringSampleProvider(_sampleChannel);
_meteringProvider.StreamVolume += MeteringProviderStreamVolume;
_needsSetup = false;
if (HasAudioStream != null)
HasAudioStream(this, EventArgs.Empty);
}
return sf;
}
private SoundFormat SoundFormatCallback(SoundFormat sf)
{
if (_needsSetup)
{
_recordingFormat = new WaveFormat(sf.Rate, 16, sf.Channels);
_waveProvider = new BufferedWaveProvider(RecordingFormat);
_sampleChannel = new SampleChannel(_waveProvider);
_sampleChannel.PreVolumeMeter += SampleChannelPreVolumeMeter;
_needsSetup = false;
}
return sf;
}
private SoundFormat SoundFormatCallback(SoundFormat sf)
{
if (!_needsSetup) return sf;
int chan = _realChannels = sf.Channels;
if (chan > 1)
chan = 2;//downmix
_recordingFormat = new WaveFormat(sf.Rate, 16, chan);
_waveProvider = new BufferedWaveProvider(RecordingFormat);
_sampleChannel = new SampleChannel(_waveProvider);
_sampleChannel.PreVolumeMeter += SampleChannelPreVolumeMeter;
_needsSetup = false;
if (HasAudioStream != null)
{
HasAudioStream(this, EventArgs.Empty);
HasAudioStream = null;
}
return sf;
}
private int SetupCallback(void** data, char* format, int* rate, int* channels)
{
IntPtr pFormat = new IntPtr(format);
string formatStr = Marshal.PtrToStringAnsi(pFormat);
SoundType sType;
if (!Enum.TryParse<SoundType>(formatStr, out sType))
{
throw new ArgumentException("Unsupported sound type " + formatStr);
}
m_format = new SoundFormat(sType, *rate, *channels);
if (m_formatSetupCB != null)
{
m_format = m_formatSetupCB(m_format);
}
Marshal.Copy(m_format.Format.ToUtf8(), 0, pFormat, 4);
*rate = m_format.Rate;
*channels = m_format.Channels;
return m_format.UseCustomAudioRendering == true ? 0 : 1;
}
