parameter_target.hpp

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#pragma once
 
#include <pulp/timeline/item_id.hpp>
 
#include <cstddef>
#include <cstdint>
#include <optional>
#include <string_view>
#include <variant>
 
namespace pulp::timeline {


struct DeviceParameterTarget {
    ItemId device_placement_id;
    std::uint32_t param_id = 0;

    constexpr bool valid() const noexcept {
        return device_placement_id.valid();
    }
 
    constexpr bool operator==(const DeviceParameterTarget&) const = default;
};

enum class TrackMixerParameter : std::uint8_t {
    Gain,
    Pan,
};

constexpr std::string_view track_mixer_parameter_name(TrackMixerParameter value) noexcept {
    switch (value) {
    case TrackMixerParameter::Gain:
        return "gain";
    case TrackMixerParameter::Pan:
        return "pan";
    }
    return "gain";
}

constexpr std::optional<TrackMixerParameter>
track_mixer_parameter_from_name(std::string_view name) noexcept {
    if (name == "gain")
        return TrackMixerParameter::Gain;
    if (name == "pan")
        return TrackMixerParameter::Pan;
    return std::nullopt;
}

struct TrackMixerTarget {
    TrackMixerParameter parameter = TrackMixerParameter::Gain;

    constexpr bool valid() const noexcept {
        switch (parameter) {
        case TrackMixerParameter::Gain:
        case TrackMixerParameter::Pan:
            return true;
        }
        return false;
    }
 
    constexpr bool operator==(const TrackMixerTarget&) const = default;
};

using ParameterTarget = std::variant<DeviceParameterTarget, TrackMixerTarget>;

inline constexpr std::size_t kParameterTargetAlternativeCount =
    std::variant_size_v<ParameterTarget>;

 
} // namespace pulp::timeline