From 4bc6686b6a80bbae78febf97652e2f0841ca396a Mon Sep 17 00:00:00 2001
From: dyphire <qimoge@gmail.com>
Date: Sun, 23 Oct 2022 22:51:50 +0800
Subject: [PATCH] TOOLS/lua/autoload: fix incorrect duplicate file loading
 behavior

This will correctly avoid the duplicate file loading when the playlist
changes due to shuffle playback or append new files.

Fixes https://github.com/mpv-player/mpv/issues/8575
---
 TOOLS/lua/autoload.lua | 23 ++++++++++++++---------
 1 file changed, 14 insertions(+), 9 deletions(-)

diff --git a/TOOLS/lua/autoload.lua b/TOOLS/lua/autoload.lua
index 392ccdff37..048ecdedb0 100644
--- a/TOOLS/lua/autoload.lua
+++ b/TOOLS/lua/autoload.lua
@@ -127,6 +127,16 @@ end
 
 local autoloaded = nil
 
+function get_playlist_filenames()
+  local filenames = {}
+  for n = 0, pl_count - 1, 1 do
+    local filename = mp.get_property('playlist/'..n..'/filename')
+    local _, file = utils.split_path(filename)
+    filenames[file] = true
+  end
+  return filenames
+end
+
 function find_and_add_entries()
     local path = mp.get_property("path", "")
     local dir, filename = utils.split_path(path)
@@ -139,7 +149,7 @@ function find_and_add_entries()
         return
     end
 
-    local pl_count = mp.get_property_number("playlist-count", 1)
+    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
@@ -191,22 +201,17 @@ function find_and_add_entries()
     msg.trace("current file position in files: "..current)
 
     local append = {[-1] = {}, [1] = {}}
+    local filenames = get_playlist_filenames()
     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
+            -- skip files already in playlist
+            if filenames[file] then break end
 
             if direction == -1 then
                 if pl_current == 1 then -- never add additional entries in the middle