aiden/video-shader-toys
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Further refactor
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This commit is contained in:
Aiden
2026-05-06 09:31:44 +10:00
parent 0bfffa6552
commit 9e480db31c
5 changed files with 58 additions and 43 deletions
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3
CMakeLists.txt
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@@ -49,7 +49,10 @@ set(APP_SOURCES
"${APP_DIR}/decklink/DeckLinkFrameTransfer.h"
"${APP_DIR}/gl/GLExtensions.cpp"
"${APP_DIR}/gl/GLExtensions.h"
"${APP_DIR}/gl/GlRenderConstants.h"
"${APP_DIR}/gl/GlScopedObjects.h"
"${APP_DIR}/gl/GlShaderSources.cpp"
"${APP_DIR}/gl/GlShaderSources.h"
"${APP_DIR}/gl/OpenGLComposite.cpp"
"${APP_DIR}/gl/OpenGLComposite.h"
"${APP_DIR}/gl/OpenGLCompositeRuntimeControls.cpp"

9
apps/LoopThroughWithOpenGLCompositing/gl/GlRenderConstants.h Normal file
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@@ -0,0 +1,9 @@
#pragma once
#include <gl/gl.h>
constexpr GLuint kDecodedVideoTextureUnit = 1;
constexpr GLuint kSourceHistoryTextureUnitBase = 2;
constexpr GLuint kPackedVideoTextureUnit = 2;
constexpr GLuint kGlobalParamsBindingPoint = 0;
constexpr unsigned kPrerollFrameCount = 8;

38
apps/LoopThroughWithOpenGLCompositing/gl/GlShaderSources.cpp Normal file
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@@ -0,0 +1,38 @@
#include "GlShaderSources.h"
const char* kFullscreenTriangleVertexShaderSource =
"#version 430 core\n"
"out vec2 vTexCoord;\n"
"void main()\n"
"{\n"
" vec2 positions[3] = vec2[3](vec2(-1.0, -1.0), vec2(3.0, -1.0), vec2(-1.0, 3.0));\n"
" vec2 texCoords[3] = vec2[3](vec2(0.0, 0.0), vec2(2.0, 0.0), vec2(0.0, 2.0));\n"
" gl_Position = vec4(positions[gl_VertexID], 0.0, 1.0);\n"
" vTexCoord = texCoords[gl_VertexID];\n"
"}\n";
const char* kDecodeFragmentShaderSource =
"#version 430 core\n"
"layout(binding = 2) uniform sampler2D uPackedVideoInput;\n"
"uniform vec2 uPackedVideoResolution;\n"
"uniform vec2 uDecodedVideoResolution;\n"
"in vec2 vTexCoord;\n"
"layout(location = 0) out vec4 fragColor;\n"
"vec4 rec709YCbCr2rgba(float Y, float Cb, float Cr, float a)\n"
"{\n"
" Y = (Y * 256.0 - 16.0) / 219.0;\n"
" Cb = (Cb * 256.0 - 16.0) / 224.0 - 0.5;\n"
" Cr = (Cr * 256.0 - 16.0) / 224.0 - 0.5;\n"
" return vec4(Y + 1.5748 * Cr, Y - 0.1873 * Cb - 0.4681 * Cr, Y + 1.8556 * Cb, a);\n"
"}\n"
"void main()\n"
"{\n"
" vec2 correctedUv = vec2(vTexCoord.x, 1.0 - vTexCoord.y);\n"
" ivec2 decodedSize = ivec2(max(uDecodedVideoResolution, vec2(1.0, 1.0)));\n"
" ivec2 outputCoord = clamp(ivec2(correctedUv * vec2(decodedSize)), ivec2(0, 0), decodedSize - ivec2(1, 1));\n"
" ivec2 packedSize = ivec2(max(uPackedVideoResolution, vec2(1.0, 1.0)));\n"
" ivec2 packedCoord = ivec2(clamp(outputCoord.x / 2, 0, packedSize.x - 1), clamp(outputCoord.y, 0, packedSize.y - 1));\n"
" vec4 macroPixel = texelFetch(uPackedVideoInput, packedCoord, 0);\n"
" float ySample = (outputCoord.x & 1) != 0 ? macroPixel.a : macroPixel.g;\n"
" fragColor = rec709YCbCr2rgba(ySample, macroPixel.b, macroPixel.r, 1.0);\n"
"}\n";

4
apps/LoopThroughWithOpenGLCompositing/gl/GlShaderSources.h Normal file
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@@ -0,0 +1,4 @@
#pragma once
extern const char* kFullscreenTriangleVertexShaderSource;
extern const char* kDecodeFragmentShaderSource;

47
apps/LoopThroughWithOpenGLCompositing/gl/OpenGLComposite.cpp
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@@ -43,7 +43,9 @@
#include "DeckLinkFrameTransfer.h"
#include "OpenGLComposite.h"
#include "GLExtensions.h"
#include "GlRenderConstants.h"
#include "GlScopedObjects.h"
#include "GlShaderSources.h"
#include "OscServer.h"
#include "RuntimeControlBridge.h"
#include "Std140Buffer.h"
@@ -63,47 +65,6 @@
namespace
{
constexpr GLuint kDecodedVideoTextureUnit = 1;
constexpr GLuint kSourceHistoryTextureUnitBase = 2;
constexpr GLuint kPackedVideoTextureUnit = 2;
constexpr GLuint kGlobalParamsBindingPoint = 0;
constexpr unsigned kPrerollFrameCount = 8;
const char* kVertexShaderSource =
"#version 430 core\n"
"out vec2 vTexCoord;\n"
"void main()\n"
"{\n"
" vec2 positions[3] = vec2[3](vec2(-1.0, -1.0), vec2(3.0, -1.0), vec2(-1.0, 3.0));\n"
" vec2 texCoords[3] = vec2[3](vec2(0.0, 0.0), vec2(2.0, 0.0), vec2(0.0, 2.0));\n"
" gl_Position = vec4(positions[gl_VertexID], 0.0, 1.0);\n"
" vTexCoord = texCoords[gl_VertexID];\n"
"}\n";
const char* kDecodeFragmentShaderSource =
"#version 430 core\n"
"layout(binding = 2) uniform sampler2D uPackedVideoInput;\n"
"uniform vec2 uPackedVideoResolution;\n"
"uniform vec2 uDecodedVideoResolution;\n"
"in vec2 vTexCoord;\n"
"layout(location = 0) out vec4 fragColor;\n"
"vec4 rec709YCbCr2rgba(float Y, float Cb, float Cr, float a)\n"
"{\n"
" Y = (Y * 256.0 - 16.0) / 219.0;\n"
" Cb = (Cb * 256.0 - 16.0) / 224.0 - 0.5;\n"
" Cr = (Cr * 256.0 - 16.0) / 224.0 - 0.5;\n"
" return vec4(Y + 1.5748 * Cr, Y - 0.1873 * Cb - 0.4681 * Cr, Y + 1.8556 * Cb, a);\n"
"}\n"
"void main()\n"
"{\n"
" vec2 correctedUv = vec2(vTexCoord.x, 1.0 - vTexCoord.y);\n"
" ivec2 decodedSize = ivec2(max(uDecodedVideoResolution, vec2(1.0, 1.0)));\n"
" ivec2 outputCoord = clamp(ivec2(correctedUv * vec2(decodedSize)), ivec2(0, 0), decodedSize - ivec2(1, 1));\n"
" ivec2 packedSize = ivec2(max(uPackedVideoResolution, vec2(1.0, 1.0)));\n"
" ivec2 packedCoord = ivec2(clamp(outputCoord.x / 2, 0, packedSize.x - 1), clamp(outputCoord.y, 0, packedSize.y - 1));\n"
" vec4 macroPixel = texelFetch(uPackedVideoInput, packedCoord, 0);\n"
" float ySample = (outputCoord.x & 1) != 0 ? macroPixel.a : macroPixel.g;\n"
" fragColor = rec709YCbCr2rgba(ySample, macroPixel.b, macroPixel.r, 1.0);\n"
"}\n";
void CopyErrorMessage(const std::string& message, int errorMessageSize, char* errorMessage)
{
if (!errorMessage || errorMessageSize <= 0)
@@ -1224,7 +1185,7 @@ bool OpenGLComposite::compileSingleLayerProgram(const RuntimeRenderState& state,
std::string fragmentShaderSource;
std::string loadError;
std::vector<LayerProgram::TextureBinding> textureBindings;
const char* vertexSource = kVertexShaderSource;
const char* vertexSource = kFullscreenTriangleVertexShaderSource;
if (!mRuntimeHost->BuildLayerFragmentShaderSource(state.layerId, fragmentShaderSource, loadError))
{
@@ -1397,7 +1358,7 @@ bool OpenGLComposite::compileDecodeShader(int errorMessageSize, char* errorMessa
GLsizei errorBufferSize = 0;
GLint compileResult = GL_FALSE;
GLint linkResult = GL_FALSE;
const char* vertexSource = kVertexShaderSource;
const char* vertexSource = kFullscreenTriangleVertexShaderSource;
const char* fragmentSource = kDecodeFragmentShaderSource;
ScopedGlShader newVertexShader(glCreateShader(GL_VERTEX_SHADER));