mpv2oboeru

Commit: a5ee0f586232f40f0cd7fd5d7728ea7fe46b3eef
Parent: 718cda543de3788f758637b16bd9b2279fe3f460
Author: Ren Tatsumoto
Date:   Mon,  2 Nov 2020 09:20:24 +0300

add a base64 decoder

http://lua-users.org/wiki/BaseSixtyFour

Diffstat:
M
subs2srs.lua
 | 
19
+++++++++++++++++++

1 file changed, 19 insertions(+), 0 deletions(-)
diff --git a/subs2srs.lua b/subs2srs.lua
@@ -184,6 +184,25 @@ local function trim(str)
     return str
 end
 
+local base64d -- http://lua-users.org/wiki/BaseSixtyFour
+do
+    local b = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/'
+    base64d = function(data)
+        data = string.gsub(data, '[^'..b..'=]', '')
+        return (data:gsub('.', function(x)
+            if (x == '=') then return '' end
+            local r,f='',(b:find(x)-1)
+            for i=6,1,-1 do r=r..(f%2^i-f%2^(i-1)>0 and '1' or '0') end
+            return r;
+        end):gsub('%d%d%d?%d?%d?%d?%d?%d?', function(x)
+            if (#x ~= 8) then return '' end
+            local c=0
+            for i=1,8 do c=c+(x:sub(i,i)=='1' and 2^(8-i) or 0) end
+            return string.char(c)
+        end))
+    end
+end
+
 local function copy_sub_to_clipboard()
     platform.copy_to_clipboard("copy-on-demand", mp.get_property("sub-text"))
 end