sirc_codec.hpp

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/*
 * SPDX-FileCopyrightText: 2026 M5Stack Technology CO LTD
 *
 * SPDX-License-Identifier: MIT
 */
#ifndef M5_UNIT_INFRARED_IR_SIRC_CODEC_HPP
#define M5_UNIT_INFRARED_IR_SIRC_CODEC_HPP
 
#include "ir_codec.hpp"
 
namespace m5 {
namespace unit {
namespace ir {
 
class SircCodec : public IRCodec {
public:
    enum class Variant : uint8_t {
        SIRC12 = 12,
        SIRC15 = 15,
        SIRC20 = 20,
    };
 
    explicit SircCodec(Variant v = Variant::SIRC12) : IRCodec(CodecType::SIRC), _variant(v)
    {
    }
 
    item_container_type encode(uint16_t address, uint16_t command, bool repeat) override;
    bool decode(const gpio::m5_rmt_item_t* items, uint32_t num, DecodeResult& result) override;
 
    uint32_t carrierFrequencyHz() const override
    {
        return 40000;
    }
 
    uint8_t minFrames() const override
    {
        return 3;
    }
 
    uint16_t frameGapUs() const override
    {
        return 30000;
    }
 
    Variant variant() const
    {
        return _variant;
    }
    void setVariant(Variant v)
    {
        _variant = v;
    }
 
private:
    Variant _variant;
 
    static constexpr uint16_t START_MARK{2400};
    static constexpr uint16_t START_SPACE{600};
    static constexpr uint16_t ONE_MARK{1200};
    static constexpr uint16_t ZERO_MARK{600};
    static constexpr uint16_t BIT_SPACE{600};
    static constexpr uint16_t TOLERANCE{200};
};
 
}  // namespace ir
}  // namespace unit
}  // namespace m5
#endif