// live_params.cpp — the fold from the parameter set to the live block, and the ramp-step law.
// See live_params.h for the publication contract.

#include "core/instrument/engine/live_params.h"

namespace reasampler::instrument::engine {

LiveValues foldLive(const PlayParams& params, double keyTrack) {
    LiveValues v;
    v.keyTrack = keyTrack;
    // Folded here, not at the voice: Voice::start reads the block's value directly, so the
    // spline rule has to be applied on the way in or the two would answer differently.
    v.splineActive = splineActive(params);
    v.lengthFraction = effectiveLengthFraction(params);
    v.filterSettings = params.filter.settings;
    v.filterModAmount = params.filter.modAmount;
    v.filterVelAmount = params.filter.velAmount;
    v.filterKeyTrack = params.filter.keyTrack;
    v.filterEnv = params.filter.env;
    v.filterAhd = params.filter.trigEnv;
    v.adsr = params.adsr;
    v.ampAhd = params.trigAhd;
    v.pitchEnv = params.pitchEnv;
    v.playRate = params.playRate;
    v.pitchOffsetSemitones = params.pitchOffsetSemitones;
    return v;
}

double liveRampStep(double sampleRate) {
    if (!(sampleRate > 0.0)) return 0.0;  // also catches NaN
    return 1.0 / (kLiveRampSeconds * sampleRate);
}

}  // namespace reasampler::instrument::engine