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Unconditionally override host-reported minimum luminance value

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This commit is contained in:
Cameron Gutman 2023-12-18 16:43:17 -06:00
parent 2a05b890d8
commit 770872238d
1 changed files with 5 additions and 9 deletions
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14
app/streaming/video/ffmpeg-renderers/plvk.cpp
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@ -514,15 +514,11 @@ bool PlVkRenderer::mapAvFrameToPlacebo(const AVFrame *frame, pl_frame* mappedFra
return false;
}
// libplacebo assumes a minimum luminance value of 0 means the actual value was unknown.
// Since we assume the host values are correct, we use the PL_COLOR_HDR_BLACK constant to
// indicate infinite contrast.
//
// NB: We also have to check that the AVFrame actually had metadata in the first place,
// because libplacebo may infer metadata if the frame didn't have any.
if (av_frame_get_side_data(frame, AV_FRAME_DATA_MASTERING_DISPLAY_METADATA) && !mappedFrame->color.hdr.min_luma) {
mappedFrame->color.hdr.min_luma = PL_COLOR_HDR_BLACK;
}
// The HDR metadata from Windows on host PCs seems to have a floor at 0.01 nits,
// which may still be too bright for OLED displays. Let's override it to avoid
// libplacebo increasing the brightness of black areas of the image.
// https://github.com/haasn/libplacebo/commit/b40d7bec8111dd602a0784274a3561323c86b27f
mappedFrame->color.hdr.min_luma = PL_COLOR_HDR_BLACK;
return true;
}