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;
}
//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);
}