1 files changed, 145 insertions, 0 deletions
diff --git a/.config/mpv/scripts/show_chapters.lua b/.config/mpv/scripts/show_chapters.lua
new file mode 100644
index 0000000..643a51f
--- /dev/null
+++ b/.config/mpv/scripts/show_chapters.lua
@@ -0,0 +1,145 @@
+-- show chapters and their time at the bottom left corner
+-- the timings get proportionally adjusted at different speeds
+
+----------------------------------------
+CHAPTERS_TO_SHOW = 10
+HOTKEY = 'c'
+
+FONT_SCALE = 80         -- in % from osd-font-size
+FONT_SCALE_inactive_chapters = 75
+FONT_ALPHA_inactive_chapters = 60
+
+AUTOSTART_IN_PATHS = {
+    "^edl://",
+    "/med/p/podcasts",
+    "/abooks/"
+}
+----------------------------------------
+
+local assdraw = require('mp.assdraw')
+
+function disp_time(time)
+    local hours = math.floor(time/3600)
+    local minutes = math.floor((time % 3600)/60)
+    local seconds = math.floor(time % 60)
+    
+    return string.format("%02d:%02d:%02d", hours, minutes, seconds)
+end
+
+function time_2_seconds(time)
+    h,m,s = time:match('(.*):(.*):(.*)$')
+    
+    return h*3600 + m*60 + s
+end
+
+function show_chapters()
+    if observation_active == false then
+        observation_active = true
+        mp.observe_property("chapter", "number", show_chapters)
+        mp.observe_property("speed", "number", show_chapters)
+    end
+
+    local osd_w, osd_h, aspect = mp.get_osd_size()
+    local ass = assdraw:ass_new()
+    ass:new_event()
+    ass:an(1)
+
+    -- font scale
+    ass:append('{\\fscx' .. tostring(FONT_SCALE) .. '}')
+    ass:append('{\\fscy' .. tostring(FONT_SCALE) .. '}')
+
+    local ch_index = mp.get_property_number("chapter")
+    local ch_total = mp.get_property_osd("chapter-list/count")
+
+    if ch_index and ch_index >= 0 then
+        ass:append("(" .. tostring(ch_index + 1) .. "/" .. tostring(ch_total) .. ")")
+
+        shift = 1
+        if ch_index == 0 then
+            start_from = 0
+        else
+            shift = ch_total - CHAPTERS_TO_SHOW - ch_index - 1
+            start_from = -1
+        end
+
+        if shift < 0 then
+            start_from = shift
+        end
+
+        for i_ch = start_from, CHAPTERS_TO_SHOW + start_from do
+            if tonumber(ch_total) == ch_index + i_ch then
+                break
+            end
+            
+            -- from overshooting backwards
+            if ch_index + i_ch < 0 then
+                goto continue
+            end
+
+            title = mp.get_property_osd("chapter-list/" .. tostring(ch_index + i_ch) .. "/title")
+            time = mp.get_property_osd("chapter-list/" .. tostring(ch_index + i_ch) .. "/time")
+
+            ass:append("\\N")
+
+            if i_ch == 0 then
+                ass:append("{\\alpha&H" .. '00' .. "}")
+                ass:append('{\\fscx' .. tostring(FONT_SCALE) .. '}')
+                ass:append('{\\fscy' .. tostring(FONT_SCALE) .. '}')
+            else
+                ass:append("{\\alpha&H" .. tostring(FONT_ALPHA_inactive_chapters) .. "}")
+                ass:append('{\\fscx' .. tostring(FONT_SCALE_inactive_chapters) .. '}')
+                ass:append('{\\fscy' .. tostring(FONT_SCALE_inactive_chapters) .. '}')
+            end
+
+            -- removing paths
+            if string.sub(title, 1, 1) == '/' then
+                title = title:match('.+/(.*)$')
+            end
+
+            speed = mp.get_property_number("speed")
+            if speed ~= 1.0 then
+                time = disp_time(time_2_seconds(time) / speed)
+            end
+
+            ass:append('[' .. time .. "]  " .. title)
+            
+            ::continue::
+        end
+    end
+
+    mp.set_osd_ass(osd_w, osd_h, ass.text)
+end
+
+function started()
+    local pth = mp.get_property("path")
+    
+    if pth == nil then
+        return
+    end
+
+    for i, i_path in pairs(AUTOSTART_IN_PATHS) do
+		if pth:find(i_path) then
+            running = true
+            show_chapters()
+			return
+		end
+    end
+end
+
+function show_hide()
+	if running == true then
+        running = false
+        observation_active = false
+        mp.set_osd_ass(0, 0, "{}")
+        mp.unobserve_property(show_chapters)
+	else
+		running = true
+        show_chapters()
+	end
+end
+
+observation_active = false
+
+mp.register_event("file-loaded", started)
+mp.add_forced_key_binding(HOTKEY, 'show_hide', show_hide, {repeatable=true})
+