68 lines
2.1 KiB
C++
68 lines
2.1 KiB
C++
/**
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* @file src/video_colorspace.h
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* @brief Declarations for colorspace functions.
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*/
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#pragma once
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extern "C" {
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#include <libavutil/pixfmt.h>
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}
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namespace video {
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enum class colorspace_e {
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rec601, ///< Rec. 601
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rec709, ///< Rec. 709
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bt2020sdr, ///< Rec. 2020 SDR
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bt2020, ///< Rec. 2020 HDR
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};
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struct sunshine_colorspace_t {
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colorspace_e colorspace;
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bool full_range;
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unsigned bit_depth;
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};
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bool colorspace_is_hdr(const sunshine_colorspace_t &colorspace);
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// Declared in video.h
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struct config_t;
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sunshine_colorspace_t colorspace_from_client_config(const config_t &config, bool hdr_display);
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struct avcodec_colorspace_t {
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AVColorPrimaries primaries;
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AVColorTransferCharacteristic transfer_function;
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AVColorSpace matrix;
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AVColorRange range;
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int software_format;
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};
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avcodec_colorspace_t avcodec_colorspace_from_sunshine_colorspace(const sunshine_colorspace_t &sunshine_colorspace);
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struct alignas(16) color_t {
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float color_vec_y[4];
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float color_vec_u[4];
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float color_vec_v[4];
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float range_y[2];
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float range_uv[2];
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};
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const color_t *color_vectors_from_colorspace(const sunshine_colorspace_t &colorspace);
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const color_t *color_vectors_from_colorspace(colorspace_e colorspace, bool full_range);
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/**
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* @brief New version of `color_vectors_from_colorspace()` function that better adheres to the standards.
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* Returned vectors are used to perform RGB->YUV conversion.
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* Unlike its predecessor, color vectors will produce output in `UINT` range, not `UNORM` range.
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* Input is still in `UNORM` range. Returned vectors won't modify color primaries and color
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* transfer function.
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* @param colorspace Targeted YUV colorspace.
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* @return `const color_t*` that contains RGB->YUV transformation vectors.
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* Components `range_y` and `range_uv` are there for backwards compatibility
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* and can be ignored in the computation.
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*/
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const color_t *new_color_vectors_from_colorspace(const sunshine_colorspace_t &colorspace);
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} // namespace video
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