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Convert Metal shaders to FP16

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Cameron Gutman
2025-12-29 01:45:49 -06:00
parent 8ee82421b3
commit 93dc6d6b60
2 changed files with 44 additions and 55 deletions
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28
app/streaming/video/ffmpeg-renderers/vt_metal.mm
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@@ -24,15 +24,15 @@ extern "C" {
struct CscParams
{
simd_float3 matrix[3];
simd_float3 offsets;
simd_half3x3 matrix;
simd_half3 offsets;
};
struct ParamBuffer
{
CscParams cscParams;
simd_float2 chromaOffset;
float bitnessScaleFactor;
simd_half2 chromaOffset;
simd_half1 bitnessScaleFactor;
};
struct Vertex
@@ -262,18 +262,14 @@ public:
getFramePremultipliedCscConstants(frame, cscMatrix, yuvOffsets);
getFrameChromaCositingOffsets(frame, chromaOffset);
// Copy the row-major CSC matrix into column-major for Metal
for (int i = 0; i < 3; i++) {
paramBuffer.cscParams.matrix[i] = simd_make_float3(cscMatrix[0 + i],
cscMatrix[3 + i],
cscMatrix[6 + i]);
}
paramBuffer.cscParams.offsets = simd_make_float3(yuvOffsets[0],
yuvOffsets[1],
yuvOffsets[2]);
paramBuffer.chromaOffset = simd_make_float2(chromaOffset[0],
chromaOffset[1]);
paramBuffer.cscParams.matrix = simd_matrix(simd_make_half3(cscMatrix[0], cscMatrix[3], cscMatrix[6]),
simd_make_half3(cscMatrix[1], cscMatrix[4], cscMatrix[7]),
simd_make_half3(cscMatrix[2], cscMatrix[5], cscMatrix[8]));
paramBuffer.cscParams.offsets = simd_make_half3(yuvOffsets[0],
yuvOffsets[1],
yuvOffsets[2]);
paramBuffer.chromaOffset = simd_make_half2(chromaOffset[0],
chromaOffset[1]);
// Set the EDR metadata for HDR10 to enable OS tonemapping
if (frame->color_trc == AVCOL_TRC_SMPTE2084 && m_MasteringDisplayColorVolume != nullptr) {