Render luma onto nv12 surface

2021-04-30 20:01:15 +02:00
parent fe8c2ceab9
commit 127b5501d9
9 changed files with 601 additions and 132 deletions
@@ -0,0 +1,40 @@
+//--------------------------------------------------------------------------------------
+// YCbCrPS2.hlsl
+//--------------------------------------------------------------------------------------
+Texture2D txInput : register(t0);
+
+SamplerState GenericSampler : register(s0);
+
+struct PS_INPUT
+{
+	float4 Pos : SV_POSITION;
+	float2 Tex : TEXCOORD;
+};
+
+struct PS_OUTPUT
+{
+	float ColorY : SV_Target0;
+	float2 ColorU: SV_Target1;
+	float2 ColorV: SV_Target2;
+};
+
+//--------------------------------------------------------------------------------------
+// Pixel Shader
+//--------------------------------------------------------------------------------------
+PS_OUTPUT PS(PS_INPUT input) : SV_Target
+{
+	PS_OUTPUT output;
+
+	float4 InputColor = txInput.Sample(GenericSampler, input.Tex);
+
+	// Range 0-255
+	output.ColorY = (0.257f * InputColor.r + 0.504f * InputColor.g + 0.098f * InputColor.b) + (16 / 256.0f);
+	output.ColorU = (-0.148f * InputColor.r - 0.291f * InputColor.g + 0.439f * InputColor.b) + (128.0f / 256.0f);
+	output.ColorV = (0.439f * InputColor.r - 0.368f * InputColor.g - 0.071f * InputColor.b) + (128.0f / 256.0f);
+
+	output.ColorY = clamp(output.ColorY, 0.0f, 255.0f);
+	output.ColorU = clamp(output.ColorU, 0.0f, 255.0f);
+	output.ColorV = clamp(output.ColorV, 0.0f, 255.0f);
+
+	return output;
+}