public void Update(GameTime gameTime)
        {
            system.update();
            if (IsSongPlaying())
            {
                uint length   = 0;
                uint position = 0;
                CurrentSong.getLength(out length, FMOD.TIMEUNIT.MS);
                Channel.getPosition(out position, FMOD.TIMEUNIT.MS);
                if (position == length)
                {
                    NextSongEvent.Invoke();
                }
            }


            #region Update System & FFT Algorithm

            if (FFTEnabled)
            {
                // Perform a Fast Fourier Transform

                int    windowSize = spectrum.Length; //Samples.
                IntPtr data;
                uint   length;
                //hanning bpm
                MyDSP.setParameterInt((int)FMOD.DSP_FFT.WINDOWTYPE, (int)FMOD.DSP_FFT_WINDOW.HAMMING);
                MyDSP.setParameterInt((int)FMOD.DSP_FFT.WINDOWSIZE, windowSize);
                MyDSP.getParameterData((int)FMOD.DSP_FFT.SPECTRUMDATA, out data, out length);
                MyDSP.getParameterFloat((int)FMOD.DSP_FFT.DOMINANT_FREQ, out higher_freq);
                fftParameter = (FMOD.DSP_PARAMETER_FFT)Marshal.PtrToStructure(data, typeof(FMOD.DSP_PARAMETER_FFT));

                #region BPMDetection

                if (fftParameter.spectrum.Length != 0)
                {
                    for (int i = 0; i < windowSize; i++)
                    {
                        if (fftParameter.spectrum.Length == 2)
                        {
                            spectrum[i] = (fftParameter.spectrum[0][i] + fftParameter.spectrum[1][i]) / 2f;
                        }
                    }
                }
                previousSpectrum = spectrum;
                #endregion
            }
            #endregion
        }
        public string RecognizeByAudioSource(FMOD.DSP m_FFTDsp, int rate)
        {
            string result = null;
            IntPtr unmanagedData;
            uint   length;

            m_FFTDsp.getParameterData((int)FMOD.DSP_FFT.SPECTRUMDATA, out unmanagedData, out length);
            FMOD.DSP_PARAMETER_FFT fftData = (FMOD.DSP_PARAMETER_FFT)Marshal.PtrToStructure(unmanagedData, typeof(FMOD.DSP_PARAMETER_FFT));
            if (fftData.spectrum != null && fftData.spectrum.Length > 0)
            {
                playingAudioSpectrum = fftData.spectrum[0];
                Recognize(ref result, rate);
            }
            return(result);
        }
Example #3
0
        public static void Update(GameTime gameTime)
        {
            system.update();
            if (IsSongPlaying())
            {
                uint length   = 0;
                uint position = 0;
                CurrentSong.getLength(out length, FMOD.TIMEUNIT.MS);
                Channel.getPosition(out position, FMOD.TIMEUNIT.MS);
                if (position == length)
                {
                    NextSongEvent.Invoke();
                }



                // BPM Method 1 (More research)
                #region Update System & FFT Algorithm

                if (FFTEnabled)
                {
                    // Perform a Fast Fourier Transform

                    int    windowSize = spectrum.Length; //Samples.
                    IntPtr data;
                    uint   fft_length;
                    //hanning bpm
                    MyDSP.setParameterInt((int)FMOD.DSP_FFT.WINDOWTYPE, (int)FMOD.DSP_FFT_WINDOW.HAMMING);
                    MyDSP.setParameterInt((int)FMOD.DSP_FFT.WINDOWSIZE, windowSize);
                    MyDSP.getParameterData((int)FMOD.DSP_FFT.SPECTRUMDATA, out data, out fft_length);
                    MyDSP.getParameterFloat((int)FMOD.DSP_FFT.DOMINANT_FREQ, out higher_freq);
                    fftParameter = (FMOD.DSP_PARAMETER_FFT)Marshal.PtrToStructure(data, typeof(FMOD.DSP_PARAMETER_FFT));

                    #region BPMDetection

                    if (fftParameter.spectrum.Length != 0)
                    {
                        for (int i = 0; i < windowSize; i++)
                        {
                            if (fftParameter.spectrum.Length == 2)
                            {
                                spectrum[i] = (fftParameter.spectrum[0][i] + fftParameter.spectrum[1][i]) / 2f;
                            }
                        }
                    }
                    previousSpectrum = spectrum;
                    #endregion
                }
                #endregion

                // BPM Method 2 (Working! but with small sync bugs)

                float bps = (60f / BPM);
                bpm_elapsed += (float)gameTime.ElapsedGameTime.TotalSeconds;

                if (bpm_elapsed > bps)
                {
                    gotBeat       = true;
                    offBeatDelay += (float)gameTime.ElapsedGameTime.TotalSeconds;
                    if (offBeatDelay > bps)
                    {
                        gotBeat      = false;
                        bpm_elapsed  = 0f;
                        offBeatDelay = 0f;
                    }
                }
            }
            Channel.setVolume(masterVolume * musicVolume);
        }