--- /dev/null
+#ifndef _YCBCR_CONVERTER_H
+#define _YCBCR_CONVERTER_H 1
+
+#include <epoxy/gl.h>
+#include <memory>
+#include <movit/ycbcr_input.h>
+
+namespace movit {
+
+class EffectChain;
+class MixEffect;
+class ResourcePool;
+struct YCbCrFormat;
+
+} // namespace movit
+
+struct Frame;
+
+class YCbCrConverter {
+public:
+ enum OutputMode {
+ OUTPUT_TO_RGBA, // One texture (bottom-left origin): RGBA
+ OUTPUT_TO_SEMIPLANAR, // Two textures (top-left origin): Y, CbCr
+ OUTPUT_TO_DUAL_YCBCR // Two textures (top-left origin): Y'CbCr, Y'CbCr
+ };
+ YCbCrConverter(OutputMode output_mode, movit::ResourcePool *resource_pool);
+
+ // Returns the appropriate chain for rendering.
+ movit::EffectChain *prepare_chain_for_conversion(std::shared_ptr<Frame> frame);
+ movit::EffectChain *prepare_chain_for_fade(std::shared_ptr<Frame> frame, std::shared_ptr<Frame> secondary_frame, float fade_alpha);
+
+ // <tex> must be interleaved Y'CbCr.
+ movit::EffectChain *prepare_chain_for_fade_from_texture(GLuint tex, std::shared_ptr<Frame> secondary_frame, float fade_alpha);
+
+private:
+ movit::YCbCrFormat ycbcr_format;
+
+ // Effectively only converts from 4:2:2 to 4:4:4.
+ // TODO: Have a separate version with ResampleEffect, for scaling?
+ std::unique_ptr<movit::EffectChain> planar_chain, semiplanar_chain;
+ movit::YCbCrInput *ycbcr_planar_input, *ycbcr_semiplanar_input;
+
+ // These do fades, parametrized on whether the two inputs are planar
+ // or semiplanar.
+ struct FadeChain {
+ std::unique_ptr<movit::EffectChain> chain;
+ movit::YCbCrInput *input[2];
+ movit::MixEffect *mix_effect;
+ };
+ FadeChain fade_chains[2][2];
+
+ // These do fades, where the first input is interleaved and the second is
+ // either planar or semiplanar.
+ FadeChain interleaved_fade_chains[2];
+};
+
+// TODO: make private
+void setup_input_for_frame(std::shared_ptr<Frame> frame, const movit::YCbCrFormat &ycbcr_format, movit::YCbCrInput *input);
+
+#endif // !defined(_YCBCR_CONVERTER_H)