From fc0d2a5e801447173941d2d244b2c56d09493477 Mon Sep 17 00:00:00 2001
From: Daniel Brooks <db48x@db48x.net>
Date: Sun, 17 Nov 2019 22:22:14 -0800
Subject: [PATCH] add an autoboot option for MAMELoader, and make IA's
 emulator_start metadata use it

---
 loader.js | 19 ++++++++++++++++---
 1 file changed, 16 insertions(+), 3 deletions(-)

diff --git a/loader.js b/loader.js
index 2371eca..85b4aa9 100644
--- a/loader.js
+++ b/loader.js
@@ -250,6 +250,10 @@ var Module = null;
                                            } else if (module) { // MAME
                                              config_args.push(cfgr.driver(modulecfg.driver),
                                                               cfgr.extraArgs(modulecfg.extra_args));
+                                             let emulator_start_item = metadata.getElementsByTagName("emulator_start");
+                                             if (emulator_start_item.length > 0) {
+                                               config_args.push(cfgr.autoboot(emulator_start_item.item(0).textContent));
+                                             }
                                            }
 
                                            splash.setTitle("Downloading game data...");
@@ -745,8 +749,9 @@ var Module = null;
      var config = Array.prototype.reduce.call(arguments, extend);
      config.emulator_arguments = build_mame_arguments(config.muted, config.mame_driver,
                                                       config.nativeResolution, config.sample_rate,
-                                                      config.peripheral, config.extra_mame_args,
-                                                      config.keep_aspect, config.scale);
+                                                      config.peripheral, config.autoboot,
+                                                      config.extra_mame_args, config.keep_aspect,
+                                                      config.scale);
      config.runner = MAMERunner;
      return config;
    }
@@ -770,6 +775,10 @@ var Module = null;
      return { extra_mame_args: args };
    };
 
+   MAMELoader.autoboot = function (path) {
+    return { autoboot: path };
+   };
+
    /**
     * VICELoader
     */
@@ -891,7 +900,7 @@ var Module = null;
      return { extra_np2_args: args };
    };
 
-   var build_mame_arguments = function (muted, driver, native_resolution, sample_rate, peripheral, extra_args, keepaspect, scale) {
+   var build_mame_arguments = function (muted, driver, native_resolution, sample_rate, peripheral, autoboot, extra_args, keepaspect, scale) {
      scale = scale || 1;
      var args = [driver,
                  '-verbose',
@@ -916,6 +925,10 @@ var Module = null;
        }
      }
 
+     if (autoboot) {
+       args.push('-autoboot_command', autoboot, '-autoboot_delay', '2');
+     }
+
      if (extra_args) {
        args = args.concat(extra_args);
      }