mirror of
https://github.com/mpv-player/mpv
synced 2025-01-26 01:23:17 +00:00
4c2edecd7d
The major changes are as follows: 1. Use `uint32_t` instead of `unsigned int` for the SSBO size calculation. This doesn't really matter, since a too-big buffer will still work just fine, but since `uint` is a 32-bit integer by definition this is the correct way to do it. 2. Pre-divide the frame_sum by the num_wg immediately at the end of a frame. This change was made to prevent overflow. At 4K screen size, this code is currently already very at risk of overflow, especially once I started playing with longer averaging sizes. Pre-dividing this out makes it just about fit into 32-bit even for worst-case PQ content. (It's technically also faster and easier this way, so I should have done it to begin with). Rename `frame_sum` to `frame_avg` to clearly signal the change in semantics. 3. Implement a scene transition detection algorithm. This basically compares the current frame's average brightness against the (averaged) value of the past frames. If it exceeds a threshold, which I experimentally configured, we reset the peak detection SSBO's state immediately - so that it just contains the current frame. This prevents annoying "eye adaptation"-like effects on scene transitions. 4. As a result of the previous change, we can now use a much larger buffer size by default, which results in a more stable and less flickery result. I experimented with values between 20 and 256 and settled on the new value of 64. (I also switched to a power-of-2 array size, because I like powers of two) |
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| .. | ||
| context.c | ||
| context.h | ||
| d3d11_helpers.c | ||
| d3d11_helpers.h | ||
| hwdec.c | ||
| hwdec.h | ||
| lcms.c | ||
| lcms.h | ||
| osd.c | ||
| osd.h | ||
| ra.c | ||
| ra.h | ||
| shader_cache.c | ||
| shader_cache.h | ||
| spirv_shaderc.c | ||
| spirv.c | ||
| spirv.h | ||
| user_shaders.c | ||
| user_shaders.h | ||
| utils.c | ||
| utils.h | ||
| video_shaders.c | ||
| video_shaders.h | ||
| video.c | ||
| video.h | ||