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| author | Niklas Haas <git@haasn.xyz> | 2019-01-04 16:46:38 +0100 |
|---|---|---|
| committer | Jan Ekström <jeebjp@gmail.com> | 2019-02-18 01:54:06 +0200 |
| commit | 3f1bc25d4de6150b0acff7e92d3e3084a7d989f0 (patch) | |
| tree | 71d9e56cebef3fa8553795847a3c47bba54be1bb /video/out/gpu/video_shaders.c | |
| parent | b4b719e33748970a9bf98a82a017d8f149ecb557 (diff) | |
| download | mpv-3f1bc25d4de6150b0acff7e92d3e3084a7d989f0.tar.bz2 mpv-3f1bc25d4de6150b0acff7e92d3e3084a7d989f0.tar.xz | |
vo_gpu: use dB units for scene change detection
Rather than the linear cd/m^2 units, these (relative) logarithmic units
lend themselves much better to actually detecting scene changes,
especially since the scene averaging was changed to also work
logarithmically.
Diffstat (limited to 'video/out/gpu/video_shaders.c')
| -rw-r--r-- | video/out/gpu/video_shaders.c | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/video/out/gpu/video_shaders.c b/video/out/gpu/video_shaders.c index 07ac0b940f..5fea739385 100644 --- a/video/out/gpu/video_shaders.c +++ b/video/out/gpu/video_shaders.c @@ -613,9 +613,10 @@ static void hdr_update_peak(struct gl_shader_cache *sc, GLSLF(" average += %f * (cur - average);\n", decay); // Scene change hysteresis - GLSLF(" float weight = smoothstep(%f, %f, abs(cur.x - average.x));\n", - (float) opts->scene_threshold_low / MP_REF_WHITE, - (float) opts->scene_threshold_high / MP_REF_WHITE); + float log_db = 10.0 / log(10.0); + GLSLF(" float weight = smoothstep(%f, %f, abs(log(cur.x / average.x)));\n", + opts->scene_threshold_low / log_db, + opts->scene_threshold_high / log_db); GLSL( average = mix(average, cur, weight);) // Reset SSBO state for the next frame |