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119 lines
3.7 KiB
119 lines
3.7 KiB
#pragma once
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#include <array>
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#include <stdexcept>
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namespace esphome {
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namespace rgbww {
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namespace yeelight_bs2 {
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// Same range as supported by the original Yeelight firmware.
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static const int MIRED_MAX = 153;
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static const int MIRED_MIN = 588;
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struct RgbwLevelsByTemperature {
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float from_temperature;
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float red;
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float green;
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float blue;
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float white;
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};
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using RgbwLevelsTable = std::array<RgbwLevelsByTemperature, 15>;
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static const RgbwLevelsTable rgbw_levels_1_ {{
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{ 501.0f, 87.3f, 90.7f, 100.0f, 6.3f },
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{ 455.0f, 87.3f, 89.6f, 100.0f, 6.3f },
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{ 417.0f, 87.3f, 89.1f, 100.0f, 6.8f },
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{ 371.0f, 87.3f, 88.0f, 100.0f, 7.0f },
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{ 334.0f, 87.3f, 88.7f, 100.0f, 8.8f },
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{ 313.0f, 88.2f, 90.4f, 100.0f, 12.8f },
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{ 295.0f, 94.7f, 100.0f, 96.8f, 14.5f },
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{ 251.0f, 99.9f, 100.0f, 100.0f, 15.5f },
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{ 223.0f, 100.0f, 89.9f, 92.1f, 13.0f },
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{ 201.0f, 100.0f, 87.3f, 90.8f, 11.5f },
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{ 182.0f, 100.0f, 87.3f, 90.1f, 10.3f },
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{ 173.0f, 100.0f, 87.3f, 90.4f, 9.4f },
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{ 167.0f, 100.0f, 87.3f, 89.1f, 9.8f },
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{ 154.0f, 100.0f, 87.3f, 89.4f, 9.0f },
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{ 153.0f, 100.0f, 87.3f, 89.2f, 8.8f }
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}};
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static const RgbwLevelsTable rgbw_levels_100_ {{
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{ 501.0f, 0.0f, 34.4f, 100.0f, 6.8f },
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{ 455.0f, 0.0f, 23.7f, 100.0f, 9.3f },
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{ 417.0f, 0.0f, 18.6f, 100.0f, 12.0f },
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{ 371.0f, 0.0f, 14.9f, 100.0f, 16.7f },
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{ 334.0f, 0.0f, 13.5f, 100.0f, 32.5f },
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{ 313.0f, 9.7f, 31.4f, 100.0f, 74.0f },
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{ 295.0f, 74.5f, 100.0f, 95.3f, 90.5f },
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{ 251.0f, 100.0f, 100.0f, 100.0f, 100.0f },
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{ 223.0f, 100.0f, 26.7f, 48.5f, 76.5f },
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{ 201.0f, 100.0f, 0.0f, 35.5f, 60.9f },
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{ 182.0f, 100.0f, 0.0f, 28.2f, 48.9f },
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{ 173.0f, 100.0f, 0.0f, 31.3f, 39.2f },
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{ 167.0f, 100.0f, 0.0f, 18.0f, 42.2f },
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{ 154.0f, 100.0f, 0.0f, 21.8f, 36.8f },
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{ 153.0f, 100.0f, 0.0f, 18.7f, 33.5f }
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}};
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class WhiteLight
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{
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public:
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float red = 0;
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float green = 0;
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float blue = 0;
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float white = 0;
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void set_color(float temperature, float brightness)
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{
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temperature = clamp_temperature_(temperature);
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brightness = clamp_brightness_(brightness);
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auto levels_1 = lookup_in_table_(rgbw_levels_1_, temperature);
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auto levels_100 = lookup_in_table_(rgbw_levels_100_, temperature);
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red = interpolate_(levels_1.red, levels_100.red, brightness);
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green = interpolate_(levels_1.green, levels_100.green, brightness);
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blue = interpolate_(levels_1.blue, levels_100.blue, brightness);
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white = interpolate_(levels_1.white, levels_100.white, brightness);
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}
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protected:
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float clamp_temperature_(float temperature)
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{
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if (temperature < MIRED_MAX)
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temperature = MIRED_MAX;
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else if (temperature > MIRED_MIN)
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temperature = MIRED_MIN;
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return temperature;
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}
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float clamp_brightness_(float brightness)
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{
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if (brightness < 0.01f)
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brightness = 0.01f;
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else if (brightness > 1.00f)
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brightness = 1.00f;
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return brightness;
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}
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RgbwLevelsByTemperature lookup_in_table_(RgbwLevelsTable table, float temperature)
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{
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for (RgbwLevelsByTemperature& item : table)
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if (temperature >= item.from_temperature)
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return item;
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throw std::invalid_argument("received too low temperature");
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}
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float interpolate_(float level_1, float level_100, float brightness)
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{
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auto coefficient = (level_100 - level_1) / 0.99f;
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auto level = level_1 + (brightness - 0.01f) * coefficient;
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return level;
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}
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};
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} // namespace yeelight_bs2
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} // namespace rgbww
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} // namespace esphome
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