Add mpv config

mpv/scripts/cycle-denoise.lua

@@ -0,0 +1,94 @@
+-- settings
+-- key_binding: press the key specified below
+--      to cycle between denoise filters below,
+--      set it to nil to disable the binding
+local key_binding = "n"
+-- key_binding_reverse cycle between denoise filters below
+--      in reverse order, set it to nil to disable the binding,
+--      set it to a single-char string to enable
+local key_binding_reverse = nil
+
+-- denoisers: specify names of denoise libavfilter filters
+--     from `mpv --vf=lavfi=help` command
+--     where the last 3 filters (dctdnoiz, owdenoise, nlmeans)
+--     are too slow to be used in playback
+local denoisers = {
+    "removegrain"
+    ,"atadenoise"
+    ,"hqdn3d"
+    ,"vaguedenoiser"
+--    ,"dctdnoiz"
+--    ,"owdenoise"
+--    ,"nlmeans"
+}
+
+local denoiser_count = #denoisers
+local filter_index = 0
+local script_name = mp.get_script_name()
+local denoise_label = string.format("%s-denoise", script_name)
+
+-- from https://github.com/mpv-player/mpv/blob/39e04e929483847a3e0722d86d53f69837ed99db/TOOLS/lua/autocrop.lua
+function del_filter_if_present(label)
+    -- necessary because mp.command('vf del @label:filter') raises an
+    -- error if the filter doesn't exist
+    local vfs = mp.get_property_native("vf")
+    for i,vf in pairs(vfs) do
+        if vf["label"] == label then
+            table.remove(vfs, i)
+            mp.set_property_native("vf", vfs)
+            return true
+        end
+    end
+    return false
+end
+
+function cycle_denoise()
+    if not del_filter_if_present(denoise_label) then
+        filter_index = 0
+    end
+
+    filter_index = filter_index + 1
+    if filter_index > denoiser_count then
+        mp.osd_message("denoise filters removed", osd_time)
+        return
+    end
+
+    -- insert the filter
+    mp.command(
+        string.format(
+            'vf add @%s:lavfi=graph="%s"',
+            denoise_label, denoisers[filter_index]
+        )
+    )
+
+end
+
+function cycle_denoise_reverse()
+    if not del_filter_if_present(denoise_label) then
+        filter_index = denoiser_count
+    else
+        filter_index = filter_index - 1
+    end
+
+    if filter_index < 1 then
+        mp.osd_message("denoise filters removed", osd_time)
+        return
+    end
+
+    -- insert the filter
+    mp.command(
+        string.format(
+            'vf add @%s:lavfi=graph="%s"',
+            denoise_label, denoisers[filter_index]
+        )
+    )
+
+end
+
+if key_binding then
+    mp.add_key_binding(key_binding, "denoise", cycle_denoise)
+end
+
+if key_binding_reverse then
+    mp.add_key_binding(key_binding_reverse, "denoise-reverse", cycle_denoise_reverse)
+end