public LibVpxEnc(LibVpxEncConfig cfg)
{
vpxCodecIface = Java_com_google_libvpx_LibVpxCom_vpxCodecAllocCodec(JNIEnv.Handle, IntPtr.Zero);
if (vpxCodecIface == 0)
{
throw new LibVpxException("Can not allocate JNI codec object");
}
Java_com_google_libvpx_LibVpxEnc_vpxCodecEncInit(JNIEnv.Handle, IntPtr.Zero, vpxCodecIface, cfg.handle());
if (isError())
{
String errorMsg = errorDetailString();
Java_com_google_libvpx_LibVpxCom_vpxCodecFreeCodec(JNIEnv.Handle, IntPtr.Zero, vpxCodecIface);
throw new LibVpxException(errorMsg);
}
}
public void Destroy()
{
try
{
if (Codec != null)
{
Codec.close();
Codec = null;
}
if (Config != null)
{
Config.close();
Config = null;
}
}
catch (Exception) { }
}
public byte[] Encode(int width, int height, byte[] frame, long fourcc, int rotation)
{
try
{
if (Codec != null && (width != Config.getWidth() || height != Config.getHeight() || _Bitrate != Config.getRCTargetBitrate() || _MaxQuantizer != Config.getRCMaxQuantizer()))
{
if (Codec != null)
{
Codec.close();
Codec = null;
}
if (Config != null)
{
Config.close();
Config = null;
}
}
if (Codec == null)
{
// define configuration options
Config = new LibVpxEncConfig(width, height);
Config.setTimebase(1, 30);
Config.setRCTargetBitrate(_Bitrate);
Config.setRCEndUsage(1); // vpx_rc_mode.VPX_CBR
//Config.setKFMode(1); // vpx_kf_mode.VPX_KF_AUTO
Config.setKFMinDist(30 * 60); // 1 per min @ 30fps
Config.setKFMaxDist(30 * 60); // 1 per min @ 30fps
Config.setErrorResilient(1);
Config.setLagInFrames(0);
Config.setPass(0); // vpx_enc_pass.VPX_RC_ONE_PASS
Config.setRCMinQuantizer(0);
Config.setRCMaxQuantizer(_MaxQuantizer);
Config.setProfile(0);
// initialize encoder
Codec = new LibVpxEnc(Config);
// additional tuning
int VP8_ONE_TOKENPARTITION = 0;
Codec.setStaticThreshold(1);
Codec.setCpuUsed(-12); // only on mobile
Codec.setTokenPartitions(VP8_ONE_TOKENPARTITION);
Codec.setNoiseSensitivity(0);
Codec.setMaxIntraBitratePct(Math.Min(300, (int)(Config.getRCBufOptimalSz() * 0.5f * MaxFramerate / 10)));
}
// set flags
long flag = 0;
if (SendKeyframe)
{
flag |= (1 << 0); // VPX_EFLAG_FORCE_KF;
SendKeyframe = false;
}
// encode
long deadline = 1; // VPX_DL_REALTIME
long duration = 90000 / MaxFramerate;
var buffer = Codec.convertByteEncodeFrame(frame, FrameCount, duration, flag, deadline, fourcc, rotation);
FrameCount++;
// get frame
return(buffer);
}
catch (Exception ex)
{
Log.Error("Could not encode frame.", ex);
}
return(null);
}