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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 5000 * 2 files when starting a file (before + after).
MAXENTRIES = 5000
local msg = require 'mp.msg'
local options = require 'mp.options'
local utils = require 'mp.utils'
o = {
disabled = false
}
options.read_options(o)
function Set (t)
local set = {}
for _, v in pairs(t) do set[v] = true end
return set
end
EXTENSIONS = Set {
'mkv', 'avi', 'mp4', 'ogv', 'webm', 'rmvb', 'flv', 'wmv', 'mpeg', 'mpg', 'm4v', '3gp',
'mp3', 'wav', 'ogm', 'flac', 'm4a', 'wma', 'ogg', 'opus',
}
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 get_extension(path)
match = string.match(path, "%.([^%.]+)$" )
if match == nil then
return "nomatch"
else
return match
end
end
table.filter = function(t, iter)
for i = #t, 1, -1 do
if not iter(t[i]) then
table.remove(t, i)
end
end
end
-- splitbynum and alnumcomp from alphanum.lua (C) Andre Bogus
-- Released under the MIT License
-- http://www.davekoelle.com/files/alphanum.lua
-- split a string into a table of number and string values
function splitbynum(s)
local result = {}
for x, y in (s or ""):gmatch("(%d*)(%D*)") do
if x ~= "" then table.insert(result, tonumber(x)) end
if y ~= "" then table.insert(result, y) end
end
return result
end
function clean_key(k)
k = (' '..k..' '):gsub("%s+", " "):sub(2, -2):lower()
return splitbynum(k)
end
-- compare two strings
function alnumcomp(x, y)
local xt, yt = clean_key(x), clean_key(y)
for i = 1, math.min(#xt, #yt) do
local xe, ye = xt[i], yt[i]
if type(xe) == "string" then ye = tostring(ye)
elseif type(ye) == "string" then xe = tostring(xe) end
if xe ~= ye then return xe < ye end
end
return #xt < #yt
end
local autoloaded = nil
function find_and_add_entries()
local path = mp.get_property("path", "")
local dir, filename = utils.split_path(path)
msg.trace(("dir: %s, filename: %s"):format(dir, filename))
if o.disabled then
msg.verbose("stopping: autoload disabled")
return
elseif #dir == 0 then
msg.verbose("stopping: not a local path")
return
end
local pl_count = mp.get_property_number("playlist-count", 1)
-- check if this is a manually made playlist
if (pl_count > 1 and autoloaded == nil) or
(pl_count == 1 and EXTENSIONS[string.lower(get_extension(filename))] == nil) then
return
else
autoloaded = true
end
local pl = mp.get_property_native("playlist", {})
local pl_current = mp.get_property_number("playlist-pos-1", 1)
msg.trace(("playlist-pos-1: %s, playlist: %s"):format(pl_current,
utils.to_string(pl)))
local files = utils.readdir(dir, "files")
if files == nil then
return
end
table.filter(files, function (v, k)
if string.match(v, "^%.") then
return false
end
local ext = get_extension(v)
if ext == nil then
return false
end
return EXTENSIONS[string.lower(ext)]
end)
table.sort(files, alnumcomp)
if dir == "." then
dir = ""
end
-- 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
msg.trace("current file position in files: "..current)
local append = {[-1] = {}, [1] = {}}
for direction = -1, 1, 2 do -- 2 iterations, with direction = -1 and +1
for i = 1, MAXENTRIES do
local file = files[current + i * direction]
local pl_e = pl[pl_current + i * direction]
if file == nil or file[1] == "." then
break
end
local filepath = dir .. file
if pl_e then
-- If there's a playlist entry, and it's the same file, stop.
msg.trace(pl_e.filename.." == "..filepath.." ?")
if pl_e.filename == filepath then
break
end
end
if direction == -1 then
if pl_current == 1 then -- never add additional entries in the middle
msg.info("Prepending " .. file)
table.insert(append[-1], 1, filepath)
end
else
msg.info("Adding " .. file)
table.insert(append[1], filepath)
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)