UI: Correctly toggle audio multi-track buttons

This toggles audio multi track display in Output settings when:
1. When there is a signal that a stream service is changed to a non
custom one. Indeed multi-track audio is only available with Custom
service and only with SRT or RIST protocols.
2. When a Custom service is picked, and SRT or RIST are detected in the
server URL.
3. When Stream settings are saved when one hits Apply.
This is in addition to the toggling done when loading Stream Settings.

Signed-off-by: pkv <[email protected]>

UI/window-basic-settings-stream.cpp

@@ -180,6 +180,28 @@ void OBSBasicSettings::LoadStream1Settings()
 				  Qt::QueuedConnection);
 }
 
+#define SRT_PROTOCOL "srt"
+#define RIST_PROTOCOL "rist"
+
+bool OBSBasicSettings::AllowsMultiTrack(const char *protocol)
+{
+	return astrcmpi_n(protocol, SRT_PROTOCOL, strlen(SRT_PROTOCOL)) == 0 ||
+	       astrcmpi_n(protocol, RIST_PROTOCOL, strlen(RIST_PROTOCOL)) == 0;
+}
+
+void OBSBasicSettings::SwapMultiTrack(const char *protocol)
+{
+	if (protocol) {
+		if (AllowsMultiTrack(protocol)) {
+			ui->advStreamTrackWidget->setCurrentWidget(
+				ui->streamMultiTracks);
+		} else {
+			ui->advStreamTrackWidget->setCurrentWidget(
+				ui->streamSingleTracks);
+		}
+	}
+}
+
 void OBSBasicSettings::SaveStream1Settings()
 {
 	bool customServer = IsCustomService();
@@ -264,6 +286,7 @@ void OBSBasicSettings::SaveStream1Settings()
 	}
 
 	SaveCheckBox(ui->ignoreRecommended, "Stream1", "IgnoreRecommended");
+	SwapMultiTrack(QT_TO_UTF8(protocol));
 }
 
 void OBSBasicSettings::UpdateMoreInfoLink()
@@ -509,6 +532,13 @@ void OBSBasicSettings::on_service_currentIndexChanged(int idx)
 		if (idx == 0)
 			lastCustomServer = ui->customServer->text();
 	}
+
+	if (!IsCustomService()) {
+		ui->advStreamTrackWidget->setCurrentWidget(
+			ui->streamSingleTracks);
+	} else {
+		SwapMultiTrack(QT_TO_UTF8(protocol));
+	}
 }
 
 void OBSBasicSettings::on_customServer_textChanged(const QString &)
@@ -520,6 +550,8 @@ void OBSBasicSettings::on_customServer_textChanged(const QString &)
 
 	if (ServiceSupportsCodecCheck())
 		lastCustomServer = ui->customServer->text();
+
+	SwapMultiTrack(QT_TO_UTF8(protocol));
 }
 
 void OBSBasicSettings::ServiceChanged(bool resetFields)

UI/window-basic-settings.cpp

@@ -2057,16 +2057,6 @@ static inline QString makeFormatToolTip()
 	return html;
 }
 
-#define RTMP_PROTOCOL "rtmp"
-#define SRT_PROTOCOL "srt"
-#define RIST_PROTOCOL "rist"
-
-inline bool allowsMultiTrack(const char *protocol)
-{
-	return astrcmpi_n(protocol, SRT_PROTOCOL, strlen(SRT_PROTOCOL)) == 0 ||
-	       astrcmpi_n(protocol, RIST_PROTOCOL, strlen(RIST_PROTOCOL)) == 0;
-}
-
 void OBSBasicSettings::LoadAdvOutputStreamingSettings()
 {
 	const char *rescaleRes =
@@ -2118,21 +2108,10 @@ void OBSBasicSettings::LoadAdvOutputStreamingSettings()
 	ui->advOutMultiTrack5->setChecked(audioMixes & (1 << 4));
 	ui->advOutMultiTrack6->setChecked(audioMixes & (1 << 5));
 
-	bool is_multitrack_output = false;
 	obs_service_t *service_obj = main->GetService();
 	const char *protocol = nullptr;
 	protocol = obs_service_get_protocol(service_obj);
-	if (protocol) {
-		is_multitrack_output = allowsMultiTrack(protocol);
-	}
-
-	if (is_multitrack_output) {
-		ui->advStreamTrackWidget->setCurrentWidget(
-			ui->streamMultiTracks);
-	} else {
-		ui->advStreamTrackWidget->setCurrentWidget(
-			ui->streamSingleTracks);
-	}
+	SwapMultiTrack(protocol);
 }
 
 OBSPropertiesView *

UI/window-basic-settings.hpp

@@ -383,6 +383,9 @@ private:
 	bool ServiceAndACodecCompatible();
 	bool ServiceSupportsCodecCheck();
 
+	inline bool AllowsMultiTrack(const char *protocol);
+	void SwapMultiTrack(const char *protocol);
+
 private slots:
 	void on_theme_activated(int idx);