Method process

src/extended/SfxrNode.cpp:703–799

}

void SfxrNode::process(ContextRenderLock &r, int bufferSize)
{
    AudioBus * outputBus = output(0)->bus(r);

    if (!isInitialized() || !outputBus->numberOfChannels())
    {
        outputBus->zero();
        return;
    }

    int quantumFrameOffset = _scheduler._renderOffset;
    int nonSilentFramesToProcess = _scheduler._renderLength;

    if (!nonSilentFramesToProcess)
    {
        outputBus->zero();
        return;
    }

    float * destP = outputBus->channel(0)->mutableData();

    // Start rendering at the correct offset.
    destP += quantumFrameOffset;
    int n = nonSilentFramesToProcess;

#define UPDATE(typ, cur, val)                   \
    {                                           \
        typ v = static_cast<typ>(val->value()); \
        if (sfxr->cur != v)                     \
        {                                       \
            needUpdate = true;                  \
            sfxr->cur = v;                      \
        }                                       \
    }

    bool needUpdate = false;
    {
        int v = _waveType->valueUint32();
        if (sfxr->wave_type != v)
        {
            needUpdate = true;
            sfxr->wave_type = v;
        }
    }

    /// @fixme these values should be per sample, not per quantum
    /// -or- they should be settings if they don't vary per sample
    UPDATE(float, p_base_freq, _startFrequency)
    UPDATE(float, p_freq_limit, _minFrequency)
    UPDATE(float, p_freq_ramp, _slide)
    UPDATE(float, p_freq_dramp, _deltaSlide)
    UPDATE(float, p_duty, _squareDuty)
    UPDATE(float, p_duty_ramp, _dutySweep)

    UPDATE(float, p_vib_strength, _vibratoDepth)
    UPDATE(float, p_vib_speed, _vibratoSpeed)

    UPDATE(float, p_env_attack, _attack)