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

[nageru] / futatabi / chroma_subsampler.h

diff --git a/futatabi/chroma_subsampler.h b/futatabi/chroma_subsampler.h
new file mode 100644 (file)
index 0000000..ec43fe0
--- /dev/null
+++ b/futatabi/chroma_subsampler.h
@@ -0,0 +1,29 @@
+#ifndef _CHROMA_SUBSAMPLER_H
+#define _CHROMA_SUBSAMPLER_H 1
+
+#include "flow.h"
+
+#include <epoxy/gl.h>
+
+class ChromaSubsampler {
+public:
+       ChromaSubsampler();
+       ~ChromaSubsampler();
+
+       // Subsamples chroma (packed Cb and Cr) 2x1 to yield chroma suitable for
+       // planar 4:2:2. Chroma positioning is left (H.264 convention).
+       // width and height are the dimensions (in pixels) of the input texture.
+       void subsample_chroma(GLuint cbcr_tex, unsigned width, unsigned height, GLuint cb_tex, GLuint cr_tex);
+
+private:
+       PersistentFBOSet<2> fbos;
+
+       GLuint vao;
+       GLuint vbo;  // Holds position data.
+
+       GLuint cbcr_vs_obj, cbcr_fs_obj, cbcr_program;
+       GLuint uniform_cbcr_tex;
+       GLuint uniform_chroma_offset_0, uniform_chroma_offset_1;
+};
+
+#endif  // !defined(_CHROMA_SUBSAMPLER_H)