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 379279fbf7e101afda0684b7e446c7d7b0f93299..97ad5266bb3b0c9942f39dd3a2964aceedf848c1 100644 (file)
--- a/ycbcr_input.h
+++ b/ycbcr_input.h
@@ -1,44 +1,35 @@
-#ifndef _YCBCR_INPUT_H
-#define _YCBCR_INPUT_H 1
+#ifndef _MOVIT_YCBCR_INPUT_H
+#define _MOVIT_YCBCR_INPUT_H 1
 
 // YCbCrInput is for handling planar 8-bit Y'CbCr (also sometimes, usually rather
 // imprecisely, called “YUV”), which is typically what you get from a video decoder.
 // It upsamples planes as needed, using the default linear upsampling OpenGL gives you.
 
-#include "input.h"
+#include <epoxy/gl.h>
+#include <assert.h>
+#include <string>
 
-struct YCbCrFormat {
-       // Which formula for Y' to use.
-       YCbCrLumaCoefficients luma_coefficients;
+#include "effect.h"
+#include "effect_chain.h"
+#include "image_format.h"
+#include "input.h"
+#include "ycbcr.h"
 
-       // 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;
+namespace movit {
 
-       // 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 chroma_x_position, chroma_y_position;
-};
+class ResourcePool;
 
 class YCbCrInput : public Input {
 public:
        YCbCrInput(const ImageFormat &image_format,
                   const YCbCrFormat &ycbcr_format,
                   unsigned width, unsigned height);
+       ~YCbCrInput();
 
        virtual std::string effect_type_id() const { return "YCbCrInput"; }
 
-       // Create the texture itself. We cannot do this in the constructor,
-       // because we don't necessarily know all the settings (sRGB texture,
-       // mipmap generation) at that point.
-       void finalize();
-
        virtual bool can_output_linear_gamma() const { return false; }
+       virtual AlphaHandling alpha_handling() const { return OUTPUT_BLANK_ALPHA; }
 
        std::string output_fragment_shader();
 
@@ -47,55 +38,54 @@ public:
 
        unsigned get_width() const { return width; }
        unsigned get_height() const { return height; }
-       ColorSpace get_color_space() const { return image_format.color_space; }
+       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
        // is fine), or invalidate_pixel_data(). Otherwise, the texture won't be re-uploaded
        // on subsequent frames.
-       void set_pixel_data(unsigned channel, const unsigned char *pixel_data)
+       //
+       // The data can either be a regular pointer (if pbo==0), or a byte offset
+       // into a PBO. The latter will allow you to start uploading the texture data
+       // asynchronously to the GPU, if you have any CPU-intensive work between the
+       // call to set_pixel_data() and the actual rendering. In either case,
+       // the pointer (and PBO, if set) has to be valid at the time of the render call.
+       void set_pixel_data(unsigned channel, const unsigned char *pixel_data, GLuint pbo = 0)
        {
                assert(channel >= 0 && channel < 3);
                this->pixel_data[channel] = pixel_data;
+               this->pbos[channel] = pbo;
                invalidate_pixel_data();
        }
 
-       void invalidate_pixel_data()
-       {
-               needs_update = true;
-       }
-
-       const unsigned char *get_pixel_data(unsigned channel) const
-       {
-               assert(channel >= 0 && channel < 3);
-               return pixel_data[channel];
-       }
+       void invalidate_pixel_data();
 
        void set_pitch(unsigned channel, unsigned pitch) {
                assert(channel >= 0 && channel < 3);
-               if (this->pitch[channel] != pitch) {
-                       this->pitch[channel] = pitch;
-                       needs_pbo_recreate = true;
-               }
+               this->pitch[channel] = pitch;
+               invalidate_pixel_data();
        }
 
-       unsigned get_pitch(unsigned channel) {
-               assert(channel >= 0 && channel < 3);
-               return pitch[channel];
+       virtual void inform_added(EffectChain *chain)
+       {
+               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];
-       bool needs_update, needs_pbo_recreate, finalized;
-
-       int needs_mipmaps;
 
        unsigned width, height, widths[3], heights[3];
        const unsigned char *pixel_data[3];
        unsigned pitch[3];
+       ResourcePool *resource_pool;
 };
 
-#endif // !defined(_YCBCR_INPUT_H)
+}  // namespace movit
+
+#endif // !defined(_MOVIT_YCBCR_INPUT_H)