public MicEncoder(AudioEncodeCfg audioCfg, Action <MediaFrame> callback)
{
_audioCfg = audioCfg;
_channels = audioCfg.channel;
_frequency = audioCfg.frequency;
_capturer = new MicCapturer(audioCfg.micId, _channels, _frequency, audioCfg.samples, MicCapturer_CallBack);
if (audioCfg.encodeName.EqIgnoreCase("SPEX"))
{
_speex = new Speex(4);
}
else if (audioCfg.encodeName.EqIgnoreCase("AAC_"))
{
if (audioCfg.Params.ContainsKey("UseLastFaacImp") && FaacImp.LastFaacImp != null)
{
_faacImp = FaacImp.LastFaacImp;
_faacImp.Encode(new byte[2048]);
_faacImp.Encode(new byte[2048]);
_faacImp.Encode(new byte[2048]);
_faacImp.Encode(new byte[2048]);
_faacImp.Encode(new byte[2048]);
}
else
{
_faacImp = new FaacImp(_channels, _frequency, audioCfg.bitrate);
}
}
_callBack = callback;
}
public void SpeexAGC(int level = 24000)
{
if (_isDisoseing || _isDisosed)
{
return;
}
Speex.SpeexAGC(pSpx, level);
}
public void SpeexVAD(int vadProbStart = 80, int vadProbContinue = 65)
{
if (_isDisoseing || _isDisosed)
{
return;
}
Speex.SpeexVAD(pSpx, vadProbStart, vadProbContinue);
}
public void SpeexDenoise(int noiseSuppress = -25)
{
if (_isDisoseing || _isDisosed)
{
return;
}
Speex.SpeexDenoise(pSpx, noiseSuppress);
}
public Speex(int quality, int samples = 160)
{
this.Samples = samples;
if (quality < 0 || quality > 10)
{
throw new Exception("quality value must be between 0 and 10.");
}
pSpx = Speex.SpeexOpen(quality);
}
//解码
public byte[] Decode(byte[] data)
{
if (_isDisoseing || _isDisosed)
{
return(null);
}
var pData = FunctionEx.BytesToIntPtr(data);
var pOut = Marshal.AllocHGlobal(Samples * 2);
var decSize = Speex.SpeexDecode(this.pSpx, data.Length, pData, pOut);
var bytes = FunctionEx.IntPtrToBytes(pOut, 0, decSize);
Marshal.FreeHGlobal(pOut);
Marshal.FreeHGlobal(pData);
return(bytes);
}
//编码
public byte[] Encode(byte[] data)
{
if (_isDisoseing || _isDisosed)
{
return(null);
}
var pData = FunctionEx.BytesToIntPtr(data);
var pOut = Marshal.AllocHGlobal(200);
var encSize = Speex.SpeexEncode(this.pSpx, pData, pOut);
byte[] buffer = FunctionEx.IntPtrToBytes(pOut, 0, encSize);
Marshal.FreeHGlobal(pOut);
Marshal.FreeHGlobal(pData);
return(buffer);
}
public void Dispose()
{
_isDisoseing = true;
try
{
Speex.SpeexClose(this.pSpx);
}
catch
{
}
finally
{
_isDisoseing = false;
_isDisosed = true;
}
}
public byte[] Cancellation(byte[] play, byte[] mic)
{
if (_isDisoseing || _isDisosed)
{
return(null);
}
var pPlay = FunctionEx.BytesToIntPtr(play);
var pMic = FunctionEx.BytesToIntPtr(mic);
var pOut = Marshal.AllocHGlobal(mic.Length);
Speex.SpeexEchoCancellation(pSpx, pPlay, pMic, pOut);
var data = FunctionEx.IntPtrToBytes(pOut, 0, mic.Length);
Marshal.FreeHGlobal(pPlay);
Marshal.FreeHGlobal(pMic);
Marshal.FreeHGlobal(pOut);
return(data);
}