Method Update

KeyboardVisualizerCommon/Visualizer.cpp:459–670

}

void Visualizer::Update()
{
    float fft_tmp[512];

    for (int i = 0; i < 256; i++)
    {
        //Clear the buffers
        fft_tmp[i] = 0;

        //Decay previous values
        fft[i] = fft[i] * (((float)decay) / 100.0f);
    }

#ifdef WIN32
    unsigned int buffer_pos = 0;
    static float input_wave[512];

    unsigned int nextPacketSize = 1;
    unsigned int flags;

    while (nextPacketSize > 0)
    {
        float *buf;
        if (pAudioCaptureClient != NULL)
        {
            pAudioCaptureClient->GetBuffer((BYTE**)&buf, &nextPacketSize, (DWORD *)&flags, NULL, NULL);

            if (buf == NULL && nextPacketSize > 0)
            {
                pAudioClient->Stop();
                pAudioCaptureClient->Release();
                pAudioClient->Release();
                pAudioCaptureClient = NULL;
                pAudioClient = NULL;
            }
            else
            {
                for (unsigned int i = 0; i < nextPacketSize; i += 4)
                {
                    for (int j = 0; j < 255; j++)
                    {
                        input_wave[2 * j] = input_wave[2 * (j + 1)];
                        input_wave[(2 * j) + 1] = input_wave[2 * j];
                    }

                    float avg_buf = (buf[i] + buf[i + 1] + buf[i + 2] + buf[i + 3]) / 4;
                    input_wave[510] = avg_buf * 2.0f * amplitude;
                    input_wave[511] = input_wave[510];
                }

                buffer_pos += nextPacketSize / 4;
                pAudioCaptureClient->ReleaseBuffer(nextPacketSize);
            }
        }
    }

    memcpy(fft_tmp, input_wave, sizeof(input_wave));
#else