Do some IEEE trickery to help the shader optimizer remove a sub or two in some YCbCr...

[movit] / ycbcr_input.h

diff --git a/ycbcr_input.h b/ycbcr_input.h
index bf6d800eeb0c918c1b535bd2f6bf2c65c0bfa354..97ad5266bb3b0c9942f39dd3a2964aceedf848c1 100644 (file)
--- a/ycbcr_input.h
+++ b/ycbcr_input.h
@@ -13,30 +13,12 @@
 #include "effect_chain.h"
 #include "image_format.h"
 #include "input.h"
+#include "ycbcr.h"
 
 namespace movit {
 
 class ResourcePool;
 
-struct YCbCrFormat {
-       // Which formula for Y' to use.
-       YCbCrLumaCoefficients luma_coefficients;
-
-       // If true, assume Y'CbCr coefficients are full-range, ie. go from 0 to 255
-       // instead of the limited 220/225 steps in classic MPEG. For instance,
-       // JPEG uses the Rec. 601 luma coefficients, but full range.
-       bool full_range;
-
-       // Sampling factors for chroma components. For no subsampling (4:4:4),
-       // set both to 1.
-       unsigned chroma_subsampling_x, chroma_subsampling_y;
-
-       // Positioning of the chroma samples. MPEG-1 and JPEG is (0.5, 0.5);
-       // MPEG-2 and newer typically are (0.0, 0.5).
-       float cb_x_position, cb_y_position;
-       float cr_x_position, cr_y_position;
-};
-
 class YCbCrInput : public Input {
 public:
        YCbCrInput(const ImageFormat &image_format,
@@ -58,6 +40,7 @@ public:
        unsigned get_height() const { return height; }
        Colorspace get_color_space() const { return image_format.color_space; }
        GammaCurve get_gamma_curve() const { return image_format.gamma_curve; }
+       virtual bool can_supply_mipmaps() const { return false; }
 
        // Tells the input where to fetch the actual pixel data. Note that if you change
        // this data, you must either call set_pixel_data() again (using the same pointer
@@ -90,13 +73,13 @@ public:
                resource_pool = chain->get_resource_pool();
        }
 
+       bool set_int(const std::string& key, int value);
+
 private:
        ImageFormat image_format;
        YCbCrFormat ycbcr_format;
        GLuint pbos[3], texture_num[3];
 
-       int needs_mipmaps;
-
        unsigned width, height, widths[3], heights[3];
        const unsigned char *pixel_data[3];
        unsigned pitch[3];