public static void loadVideoThumb(GameObject obj, string filePath, float time)
        {
            if (!File.Exists(filePath))
            {
                print(LOG_TAG + " File not found!");
                return;
            }
            var decID     = -1;
            var width     = 0;
            var height    = 0;
            var totalTime = 0.0f;

            NativeClass.nativeCreateDecoder(filePath, ref decID);
            NativeClass.nativeGetVideoFormat(decID, ref width, ref height, ref totalTime);
            if (!NativeClass.nativeStartDecoding(decID))
            {
                print(LOG_TAG + " Decoding not start.");
                return;
            }
            var thumbY   = new Texture2D(width, height, TextureFormat.Alpha8, false);
            var thumbU   = new Texture2D(width / 2, height / 2, TextureFormat.Alpha8, false);
            var thumbV   = new Texture2D(width / 2, height / 2, TextureFormat.Alpha8, false);
            var thumbMat = getMaterial(obj);

            if (thumbMat == null)
            {
                print(LOG_TAG + " Target has no MeshRenderer.");
                NativeClass.nativeDestroyDecoder(decID);
                return;
            }
            thumbMat.SetTexture("_YTex", thumbY);
            thumbMat.SetTexture("_UTex", thumbU);
            thumbMat.SetTexture("_VTex", thumbV);
            NativeClass.nativeLoadThumbnail(decID, time, thumbY.GetNativeTexturePtr(), thumbU.GetNativeTexturePtr(), thumbV.GetNativeTexturePtr());
            NativeClass.nativeDestroyDecoder(decID);
        }
        private IEnumerator initDecoderAsync(string path)
        {
            print(LOG_TAG + " init Decoder.");
            decoderState = NativeClass.DecoderState.INITIALIZING;
            mediaPath    = path;
            decoderID    = -1;
            NativeClass.nativeCreateDecoderAsync(mediaPath, ref decoderID);
            var result = 0;

            do
            {
                yield return(null);

                result = NativeClass.nativeGetDecoderState(decoderID);
            } while (!(result == 1 || result == -1));

            //  Init success.
            if (result == 1)
            {
                print(LOG_TAG + " Init success.");
                isVideoEnabled = NativeClass.nativeIsVideoEnabled(decoderID);
                if (isVideoEnabled)
                {
                    var duration = 0.0f;
                    NativeClass.nativeGetVideoFormat(decoderID, ref videoWidth, ref videoHeight, ref duration);
                    videoTotalTime = duration > 0 ? duration : -1.0f;
                    print(LOG_TAG + " Video format: (" + videoWidth + ", " + videoHeight + ")");
                    if (videoTotalTime > 0)
                    {
                        print(LOG_TAG + " Total time: " + videoTotalTime);
                    }
                    setTextures(null, null, null);
                    useDefault = true;
                }

                //	Initialize audio.
                isAudioEnabled = NativeClass.nativeIsAudioEnabled(decoderID);
                print(LOG_TAG + " isAudioEnabled = " + isAudioEnabled);
                if (isAudioEnabled)
                {
                    if (isAllAudioChEnabled)
                    {
                        NativeClass.nativeSetAudioAllChDataEnable(decoderID, isAllAudioChEnabled);
                        getAudioFormat();
                    }
                    else
                    {
                        getAudioFormat();
                        initAudioSource();
                    }
                }
                decoderState = NativeClass.DecoderState.INITIALIZED;
                if (onInitComplete != null)
                {
                    onInitComplete.Invoke();
                }
            }
            else
            {
                print(LOG_TAG + " Init fail.");
                decoderState = NativeClass.DecoderState.INIT_FAIL;
            }
        }