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 static FaacImp LastFaacImp = null;//该变量只在IE OCX上面使用,其他地方不要使用
public FaacImp(int channel, int sample, int bitrate)
{
_channel = channel;
_sample = sample;
_bitrate = bitrate;
_handle = faacEncOpen(_sample, _channel, inputSample, maxOutputBytes);
_inputSamples = BitConverter.ToInt32(inputSample, 0);
_maxOutputBytes = BitConverter.ToInt32(maxOutputBytes, 0);
_maxInputBytes = _inputSamples * 16 / 8;
InitConfiguration();
_outputBytes = new byte[_maxOutputBytes];
LastFaacImp = this;
}