Add support for Y'CbCr output.

[movit] / ycbcr_conversion_effect.h

diff --git a/ycbcr_conversion_effect.h b/ycbcr_conversion_effect.h
new file mode 100644 (file)
index 0000000..46113bf
--- /dev/null
+++ b/ycbcr_conversion_effect.h
@@ -0,0 +1,35 @@
+#ifndef _MOVIT_YCBCR_CONVERSION_EFFECT_H
+#define _MOVIT_YCBCR_CONVERSION_EFFECT_H 1
+
+// Converts from R'G'B' to Y'CbCr; that is, more or less the opposite of YCbCrInput,
+// except that it keeps the data as 4:4:4 chunked Y'CbCr; you'll need to subsample
+// and/or convert to planar somehow else.
+
+#include <epoxy/gl.h>
+#include <string>
+
+#include "effect.h"
+#include "ycbcr.h"
+
+namespace movit {
+
+class YCbCrConversionEffect : public Effect {
+private:
+       // Should not be instantiated by end users;
+       // call EffectChain::add_ycbcr_output() instead.
+       YCbCrConversionEffect(const YCbCrFormat &ycbcr_format);
+       friend class EffectChain;
+
+public:
+       virtual std::string effect_type_id() const { return "YCbCrConversionEffect"; }
+       std::string output_fragment_shader();
+       virtual AlphaHandling alpha_handling() const { return DONT_CARE_ALPHA_TYPE; }
+       virtual bool one_to_one_sampling() const { return true; }
+
+private:
+       YCbCrFormat ycbcr_format;
+};
+
+}  // namespace movit
+
+#endif // !defined(_MOVIT_YCBCR_CONVERSION_EFFECT_H)