Fix crash caused by invalid mix_rate assignment due to bogus

project settings.

We'll default to a sensible value in the case that a user has
somehow managed to modify the configuration file incorrectly.

Closes 69819

(cherry picked from commit 5a08091168782a924cd3a23baf31c5cd4cd63906)

3 files changed, 19 insertions, 2 deletions

diff --git a/servers/audio/audio_driver_dummy.cpp b/servers/audio/audio_driver_dummy.cpp
index e6257d9260..1d11c01b9a 100644
--- a/servers/audio/audio_driver_dummy.cpp
+++ b/servers/audio/audio_driver_dummy.cpp
@@ -41,7 +41,7 @@ Error AudioDriverDummy::init() {
 	samples_in = nullptr;
 
 	if (mix_rate == -1) {
-		mix_rate = GLOBAL_GET("audio/driver/mix_rate");
+		mix_rate = _get_configured_mix_rate();
 	}
 
 	channels = get_channels();
diff --git a/servers/audio_server.cpp b/servers/audio_server.cpp
index 0344bf322d..49991e41d3 100644
--- a/servers/audio_server.cpp
+++ b/servers/audio_server.cpp
@@ -115,6 +115,20 @@ void AudioDriver::input_buffer_write(int32_t sample) {
 	}
 }
 
+int AudioDriver::_get_configured_mix_rate() {
+	StringName audio_driver_setting = "audio/driver/mix_rate";
+	int mix_rate = GLOBAL_GET(audio_driver_setting);
+
+	// In the case of invalid mix rate, let's default to a sensible value..
+	if (mix_rate <= 0) {
+		WARN_PRINT(vformat("Invalid mix rate of %d, consider reassigning setting \'%s\'. \nDefaulting mix rate to value %d.",
+				mix_rate, audio_driver_setting, AudioDriverManager::DEFAULT_MIX_RATE));
+		mix_rate = AudioDriverManager::DEFAULT_MIX_RATE;
+	}
+
+	return mix_rate;
+}
+
 AudioDriver::SpeakerMode AudioDriver::get_speaker_mode_by_total_channels(int p_channels) const {
 	switch (p_channels) {
 		case 4:
diff --git a/servers/audio_server.h b/servers/audio_server.h
index 155beb2000..6585043f63 100644
--- a/servers/audio_server.h
+++ b/servers/audio_server.h
@@ -66,6 +66,8 @@ protected:
 	void input_buffer_init(int driver_buffer_frames);
 	void input_buffer_write(int32_t sample);
 
+	int _get_configured_mix_rate();
+
 #ifdef DEBUG_ENABLED
 	_FORCE_INLINE_ void start_counting_ticks() { prof_ticks = OS::get_singleton()->get_ticks_usec(); }
 	_FORCE_INLINE_ void stop_counting_ticks() { prof_time += OS::get_singleton()->get_ticks_usec() - prof_ticks; }
@@ -136,7 +138,6 @@ class AudioDriverManager {
 		MAX_DRIVERS = 10
 	};
 
-	static const int DEFAULT_MIX_RATE = 44100;
 	static const int DEFAULT_OUTPUT_LATENCY = 15;
 
 	static AudioDriver *drivers[MAX_DRIVERS];
@@ -145,6 +146,8 @@ class AudioDriverManager {
 	static AudioDriverDummy dummy_driver;
 
 public:
+	static const int DEFAULT_MIX_RATE = 44100;
+
 	static void add_driver(AudioDriver *p_driver);
 	static void initialize(int p_driver);
 	static int get_driver_count();