1 files changed, 121 insertions, 0 deletions
diff --git a/mpv/scripts/autoload.lua b/mpv/scripts/autoload.lua
new file mode 100644
index 0000000..ffe6ddb
--- /dev/null
+++ b/mpv/scripts/autoload.lua
@@ -0,0 +1,121 @@
+-- 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
+
+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', 'ogv', 'flac', 'm4a', 'wma',
+}
+
+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 get_extension(path)
+    return string.match(path, "%.([^%.]+)$" )
+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
+
+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 isplaylist = mp.get_property("playlist-count")
+    if #isplaylist > 1 then
+        return
+    end
+
+    local files = mputils.readdir(dir, "files")
+    if files == nil then
+        return
+    end
+    table.filter(files, function (v, k)
+        local ext = get_extension(v)
+        if ext == nil then
+            return false
+        end
+        return EXTENSIONS[string.lower(ext)]
+    end)
+    table.sort(files, function (a, b)
+        return string.lower(a) < string.lower(b)
+    end)
+
+    if dir == "." then
+        dir = ""
+    end
+
+    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 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.
+                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
+                    mp.msg.info("Prepending " .. file)
+                    table.insert(append[-1], 1, filepath)
+                end
+            else
+                mp.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)