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-- This script automatically loads playlist entries before and after the
-- the currently played file. It does so by scanning the directory a file is
-- located in when starting playback. It sorts the directory entries
-- alphabetically, and adds entries before and after the current file to
-- the internal playlist. (It stops if the it would add an already existing
-- playlist entry at the same position - this makes it "stable".)
-- Add at most 5 * 2 files when starting a file (before + after).
MAXENTRIES = 5
mputils = require 'mp.utils'
function add_files_at(index, files)
index = index - 1
local oldcount = mp.get_property_number("playlist-count", 1)
for i = 1, #files do
mp.commandv("loadfile", files[i], "append")
mp.commandv("playlist_move", oldcount + i - 1, index + i - 1)
end
end
function find_and_add_entries()
local path = mp.get_property("path", "")
local dir, filename = mputils.split_path(path)
if #dir == 0 then
return
end
local files = mputils.readdir(dir, "files")
table.sort(files)
local pl = mp.get_property_native("playlist", {})
local pl_current = mp.get_property_number("playlist-pos", 0) + 1
-- Find the current pl entry (dir+"/"+filename) in the sorted dir list
local current
for i = 1, #files do
if files[i] == filename then
current = i
break
end
end
if current == nil then
return
end
local append = {[-1] = {}, [1] = {}}
for dir = -1, 1, 2 do -- 2 iterations, with dir = -1 and +1
for i = 1, MAXENTRIES do
local file = files[current + i * dir]
local pl_e = pl[pl_current + i * dir]
if file == nil or file[1] == "." then
break
end
if pl_e then
-- If there's a playlist entry, and it's the same file, stop.
if pl_e.filename == file then
break
end
end
if dir == -1 then
if pl_current == 1 then -- never add additional entries in the middle
mp.msg.info("Prepending " .. file)
table.insert(append[-1], 1, file)
end
else
mp.msg.info("Adding " .. file)
table.insert(append[1], file)
end
end
end
add_files_at(pl_current + 1, append[1])
add_files_at(pl_current, append[-1])
end
mp.register_event("start-file", find_and_add_entries)
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