Move everything into a separate futatabi/ subdir, for the upcoming merge with Futatabi.

[nageru] / nageru / chroma_subsampler.h

diff --git a/nageru/chroma_subsampler.h b/nageru/chroma_subsampler.h
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+++ b/nageru/chroma_subsampler.h
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+#ifndef _CHROMA_SUBSAMPLER_H
+#define _CHROMA_SUBSAMPLER_H 1
+
+#include <epoxy/gl.h>
+
+namespace movit {
+
+class ResourcePool;
+
+}  // namespace movit
+
+class ChromaSubsampler {
+public:
+       ChromaSubsampler(movit::ResourcePool *resource_pool);
+       ~ChromaSubsampler();
+
+       // Subsamples chroma (packed Cb and Cr) 2x2 to yield chroma suitable for
+       // NV12 (semiplanar 4:2:0). Chroma positioning is left/center (H.264 convention).
+       // width and height are the dimensions (in pixels) of the input texture.
+       //
+       // You can get two equal copies if you'd like; just set dst2_tex to a texture
+       // number and it will receive an exact copy of what goes into dst_tex.
+       void subsample_chroma(GLuint cbcr_tex, unsigned width, unsigned height, GLuint dst_tex, GLuint dst2_tex = 0);
+
+       // Subsamples and interleaves luma and chroma to give 4:2:2 packed Y'CbCr (UYVY).
+       // Chroma positioning is left (H.264 convention).
+       // width and height are the dimensions (in pixels) of the input textures.
+       void create_uyvy(GLuint y_tex, GLuint cbcr_tex, unsigned width, unsigned height, GLuint dst_tex);
+
+       // Subsamples and interleaves luma and chroma to give 10-bit 4:2:2
+       // packed Y'CbCr (v210); see v210converter.h for more information on
+       // the format. Luma and chroma are assumed to be 10-bit data packed
+       // into 16-bit textures. Chroma positioning is left (H.264 convention).
+       // width and height are the dimensions (in pixels) of the input textures;
+       // Requires compute shaders; check v210Converter::has_hardware_support().
+       void create_v210(GLuint y_tex, GLuint cbcr_tex, unsigned width, unsigned height, GLuint dst_tex);
+
+private:
+       movit::ResourcePool *resource_pool;
+
+       GLuint vbo;  // Holds position and texcoord data.
+
+       GLuint cbcr_program_num;  // Owned by <resource_pool>.
+       GLuint cbcr_texture_sampler_uniform;
+       GLint cbcr_position_attribute_index, cbcr_texcoord_attribute_index;
+       GLuint cbcr_chroma_offset_0_location, cbcr_chroma_offset_1_location;
+
+       GLuint uyvy_program_num;  // Owned by <resource_pool>.
+       GLuint uyvy_y_texture_sampler_uniform, uyvy_cbcr_texture_sampler_uniform;
+       GLint uyvy_position_attribute_index, uyvy_texcoord_attribute_index;
+       GLuint uyvy_luma_offset_0_location, uyvy_luma_offset_1_location;
+       GLuint uyvy_chroma_offset_0_location, uyvy_chroma_offset_1_location;
+
+       GLuint v210_program_num;  // Compute shader, so owned by ourselves. Can be 0.
+       GLuint v210_in_y_pos, v210_in_cbcr_pos, v210_outbuf_pos;
+       GLuint v210_inv_width_pos, v210_inv_height_pos;
+};
+
+#endif  // !defined(_CHROMA_SUBSAMPLER_H)