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diff --git a/futatabi/ycbcr_converter.h b/futatabi/ycbcr_converter.h
new file mode 100644
index 0000000..459377c
--- /dev/null
+++ b/futatabi/ycbcr_converter.h
@@ -0,0 +1,60 @@
+#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)