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| local o = { | |
| dBmin = -60, -- silence threshold in decibels | |
| duration = 1 -- display duration in seconds | |
| } | |
| (require 'mp.options').read_options(o) | |
| local dBmin = o.dBmin | |
| local aof = mp.get_property('ao') == 'pulse' and 60 or 20 | |
| local sfmax = 60 * math.log(mp.get_property_number('volume-max') / 100, 10) | |
| local aomax = 0 | |
| local function perform_dB(op, v, fmt, ao) | |
| local f, dBmax | |
| if ao == '' then | |
| f = 60 ; dBmax = sfmax | |
| else | |
| f = aof ; dBmax = aomax | |
| end | |
| local dB = f * math.log(mp.get_property_number(ao..'volume') / 100, 10) | |
| if op == 'add' then | |
| dB = math.min(math.max(dBmin, (dB == -math.huge and dBmin or dB) + v), dBmax) | |
| mp.commandv('osd-bar', 'set', ao..'volume', dB <= dBmin and 0 or 10^(2 + dB / f)) | |
| elseif op == 'set' then | |
| dB = (v == '-inf') and dBmin or tonumber(v) | |
| mp.commandv('osd-bar', 'set', ao..'volume', dB <= dBmin and 0 or 10^(2 + dB / f)) | |
| else | |
| fmt = op | |
| end | |
| local vol = dB <= dBmin and '-∞' or string.format(fmt or '%+g', | |
| math.floor(dB * 0x1p2 + 0.5) / 0x1p2) | |
| mp.osd_message(string.format(ao:upper()..'Volume: %s dB%s', vol, | |
| mp.get_property_bool(ao..'mute') and ' (Muted)' or ''), o.duration) | |
| end | |
| mp.register_script_message('dB', | |
| function(op, v, fmt) perform_dB(op, v, fmt, '') end) | |
| mp.register_script_message('ao-dB', | |
| function(op, v, fmt) perform_dB(op, v, fmt, 'ao-') end) |
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