From e1145defa9b27839607c26cf9962b938d7eef8f0 Mon Sep 17 00:00:00 2001
From: "robert.mader@collabora.com" <robert.mader@collabora.com>
Date: Tue, 30 May 2023 20:23:14 +0200
Subject: [PATCH] screencastService: Fix 'pipeline' option

When introducing the pipeline fallback mechanism, support for defining a
custom pipeline was unintentionally dropped, breaking extensions such as
EasyScreenCast.

Fixes 9cb40c4814b6be908edde4fb77a8d900a4cac51a

Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/2782>
---
 .../screencast/screencastService.js           | 23 +++++++++++++++----
 1 file changed, 19 insertions(+), 4 deletions(-)

diff --git a/js/dbusServices/screencast/screencastService.js b/js/dbusServices/screencast/screencastService.js
index 6ab92b53e..eda5c8293 100644
--- a/js/dbusServices/screencast/screencastService.js
+++ b/js/dbusServices/screencast/screencastService.js
@@ -87,6 +87,7 @@ var Recorder = class extends Signals.EventEmitter {
                 throw e;
         }
 
+        this._pipelineString = null;
         this._framerate = DEFAULT_FRAMERATE;
         this._drawCursor = DEFAULT_DRAW_CURSOR;
 
@@ -234,6 +235,23 @@ var Recorder = class extends Signals.EventEmitter {
         }
     }
 
+    *_getPipelineConfigs() {
+        if (this._pipelineString) {
+            yield {
+                pipelineString:
+                    `capsfilter caps=video/x-raw,max-framerate=%F/1 ! ${this._pipelineString}`,
+            };
+            return;
+        }
+
+        const fallbackSupported =
+                Gst.Registry.get().check_feature_version('pipewiresrc', 0, 3, 67);
+        if (fallbackSupported)
+            yield* PIPELINES;
+        else
+            yield PIPELINES.at(-1);
+    }
+
     startRecording() {
         return new Promise((resolve, reject) => {
             this._startRequest = {resolve, reject};
@@ -256,10 +274,7 @@ var Recorder = class extends Signals.EventEmitter {
                     this._nodeId = nodeId;
 
                     this._pipelineState = PipelineState.STARTING;
-                    const fallbackSupported =
-                        Gst.Registry.get().check_feature_version('pipewiresrc', 0, 3, 67);
-                    this._pipelineConfigs = fallbackSupported
-                        ? PIPELINES.values() : [PIPELINES.at(-1)].values();
+                    this._pipelineConfigs = this._getPipelineConfigs();
                     this._tryNextPipeline();
                 });
             this._sessionProxy.StartSync();