2 #include <Gfx/Graph/decoders/ColorSpace.hpp>
3 #include <Gfx/Graph/decoders/GPUVideoDecoder.hpp>
5 #include <libavformat/avformat.h>
19 static const constexpr
auto frag = R
"_(#version 450
21 )_" SCORE_GFX_VIDEO_UNIFORMS R"_(
23 layout(binding=3) uniform sampler2D y_tex;
24 layout(binding=4) uniform sampler2D u_tex;
25 layout(binding=5) uniform sampler2D v_tex;
27 layout(location = 0) in vec2 v_texcoord;
28 layout(location = 0) out vec4 fragColor;
32 vec4 processTexture(vec4 tex) {
33 vec4 processed = convert_to_rgb(tex);
40 float y = 64. * texture(y_tex, v_texcoord).r;
41 float u = 64. * texture(u_tex, v_texcoord).r;
42 float v = 64. * texture(v_tex, v_texcoord).r;
44 fragColor = processTexture(vec4(y,u,v, 1.));
56 auto& rhi = *r.
state.rhi;
57 const auto w = decoder.width, h = decoder.height;
58 const auto fmt = QRhiTexture::R16;
62 auto tex = rhi.newTexture(fmt, {w, h}, 1, QRhiTexture::Flag{});
65 auto sampler = rhi.newSampler(
66 QRhiSampler::Linear, QRhiSampler::Linear, QRhiSampler::None,
67 QRhiSampler::ClampToEdge, QRhiSampler::ClampToEdge);
69 samplers.push_back({sampler, tex});
74 auto tex = rhi.newTexture(fmt, {w / 2, h / 2}, 1, QRhiTexture::Flag{});
77 auto sampler = rhi.newSampler(
78 QRhiSampler::Linear, QRhiSampler::Linear, QRhiSampler::None,
79 QRhiSampler::ClampToEdge, QRhiSampler::ClampToEdge);
81 samplers.push_back({sampler, tex});
86 auto tex = rhi.newTexture(fmt, {w / 2, h / 2}, 1, QRhiTexture::Flag{});
89 auto sampler = rhi.newSampler(
90 QRhiSampler::Linear, QRhiSampler::Linear, QRhiSampler::None,
91 QRhiSampler::ClampToEdge, QRhiSampler::ClampToEdge);
93 samplers.push_back({sampler, tex});
97 r.
state, vertexShader(), QString(frag).arg(
"").arg(colorMatrix(decoder)));
102 setYPixels(res, frame.data[0], frame.linesize[0]);
103 setUPixels(res, frame.data[1], frame.linesize[1]);
104 setVPixels(res, frame.data[2], frame.linesize[2]);
108 setYPixels(QRhiResourceUpdateBatch& res, uint8_t* pixels,
int stride)
const noexcept
110 const auto w = decoder.width, h = decoder.height;
111 auto y_tex = samplers[0].texture;
114 QRhiTextureUploadDescription desc{entry};
116 res.uploadTexture(y_tex, desc);
120 setUPixels(QRhiResourceUpdateBatch& res, uint8_t* pixels,
int stride)
const noexcept
122 const auto w = decoder.width / 2, h = decoder.height / 2;
123 auto u_tex = samplers[1].texture;
126 QRhiTextureUploadDescription desc{entry};
128 res.uploadTexture(u_tex, desc);
132 setVPixels(QRhiResourceUpdateBatch& res, uint8_t* pixels,
int stride)
const noexcept
134 const auto w = decoder.width / 2, h = decoder.height / 2;
135 auto v_tex = samplers[2].texture;
138 QRhiTextureUploadDescription desc{entry};
139 res.uploadTexture(v_tex, desc);
Processes and renders a video frame on the GPU.
Definition: GPUVideoDecoder.hpp:43
static QRhiTextureSubresourceUploadDescription createTextureUpload(uint8_t *pixels, int w, int h, int bytesPerPixel, int stride)
Utility method to create a QRhiTextureSubresourceUploadDescription.
Definition: GPUVideoDecoder.cpp:22
List of nodes to be rendered to an output.
Definition: RenderList.hpp:19
RenderState & state
RenderState corresponding to this RenderList.
Definition: RenderList.hpp:89
Graphics rendering pipeline for ossia score.
Definition: Filter/PreviewWidget.hpp:12
std::pair< QShader, QShader > makeShaders(const RenderState &v, QString vert, QString frag)
Get a pair of compiled vertex / fragment shaders from GLSL 4.5 sources.
Definition: score-plugin-gfx/Gfx/Graph/Utils.cpp:342
Decodes YUV420 videos.
Definition: YUV420P10.hpp:18
std::pair< QShader, QShader > init(RenderList &r) override
Initialize a GPUVideoDecoder.
Definition: YUV420P10.hpp:54
void exec(RenderList &, QRhiResourceUpdateBatch &res, AVFrame &frame) override
Decode and upload a video frame to the GPU.
Definition: YUV420P10.hpp:100