115 lines
3.2 KiB
Lua
115 lines
3.2 KiB
Lua
lookahead=5 --if nextsub >= lookahead then speedup
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normalspeed=mp.get_property_native("speed")
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speedup=2.5
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-------------------
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state=0
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enable=false
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function set_timeout()
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if mp.get_property_native("cache-size") ~= nil then
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time_out = mp.get_property_native("cache-secs")
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else
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time_out = mp.get_property_native("demuxer-readahead-secs")
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end
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return time_out
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end
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function restore_normalspeed()
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mp.set_property("speed", normalspeed)
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end
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function check_should_speedup()
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subdelay = mp.get_property_native("sub-delay")
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mp.command("no-osd set sub-visibility no")
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mp.command("no-osd sub-step 1")
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nextsubdelay = mp.get_property_native("sub-delay")
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nextsub = subdelay - nextsubdelay
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--print("nextsub in seconds "..nextsub)
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mp.set_property("sub-delay", subdelay)
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mp.command("no-osd set sub-visibility yes")
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return nextsub, nextsub >= lookahead or nextsub == 0
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end
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function search_next_sub()
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nextsub, _ = check_should_speedup()
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add_timers(nextsub)
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end
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function add_timers(nextsub)
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--We know when the next sub comes
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if nextsub ~= 0 then
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--make sure we reset the speed on the unlikely case when a timer fires
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--within one second of the next sub
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if nextsub - 1 > 0 then
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mp.add_timeout((nextsub-1)/speedup, reset_early)
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else
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restore_normalspeed()
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end
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--We don't know when the next sub comes, so search for it recursively
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elseif nextsub == 0 then
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--search for next sub after time_out seconds, when its position might be known
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if not mp.get_property_native("pause") and set_timeout() - 1 > 0 then
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mp.add_timeout((time_out-1)/speedup, search_next_sub)
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end
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end
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end
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--reset to normal speed before subtitle shows up
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--prevents ugly audio glitches when speech starts
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function reset_early()
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--check if it really is time to reset
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--prevents premature change to normal speed due to seeking/pausing
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--seeking/pausing results in firing timers early/late
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if mp.get_property_native("sub-text") == "" and state == 1 then
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nextsub , shouldspeedup = check_should_speedup()
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if not shouldspeedup then
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--print("reset_early executed")
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restore_normalspeed()
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else
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--print("reset_early aborted! Seeking/Pausing?")
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end
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end
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end
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function speed_transition(subtext, sub)
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if state == 0 then
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if sub == "" then
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nextsub, shouldspeedup = check_should_speedup()
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if shouldspeedup then
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normalspeed = mp.get_property_native("speed")
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mp.set_property("speed", speedup)
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add_timers(nextsub)
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state = 1
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end
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end
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elseif state == 1 then
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if sub ~= "" then
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restore_normalspeed()
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state = 0
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end
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end
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end
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function toggle()
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if not enable then
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mp.observe_property("sub-text", "native", speed_transition)
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mp.osd_message("speed-transition enabled")
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else
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restore_normalspeed()
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mp.unobserve_property(speed_transition)
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mp.osd_message("speed-transition disabled")
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end
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state = 0
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enable = not enable
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end
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function pause(e,v)
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if not v and state == 1 then
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search_next_sub()
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end
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end
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mp.observe_property("pause", "native", pause)
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mp.add_key_binding("ctrl+j", "toggle_speedtrans", toggle)
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