vo_gpu: allow boosting dark scenes when tone mapping

In theory our "eye adaptation" algorithm works in both ways, both
darkening bright scenes and brightening dark scenes. But I've always
just prevented the latter with a hard clamp, since I wanted to avoid
blowing up dark scenes into looking funny (and full of noise).

But allowing a tiny bit of over-exposure might be a good thing. I won't
change the default just yet (better let users test), but a moderate
value of 1.2 might be better than the current 1.0 limit. Needs testing
especially on dark scenes.

1 files changed, 1 insertions, 0 deletions

diff --git a/video/out/gpu/video.h b/video/out/gpu/video.h
index 077f69332f..0bd5c57e8f 100644
--- a/video/out/gpu/video.h
+++ b/video/out/gpu/video.h
@@ -98,6 +98,7 @@ enum tone_mapping {
 struct gl_tone_map_opts {
     int curve;
     float curve_param;
+    float max_boost;
     int compute_peak;
     float decay_rate;
     int scene_threshold_low;