mac-capture: Show warning for macOS system effect on audio devices

Author: jcm93

plugins/mac-capture/CMakeLists.txt

@@ -31,6 +31,7 @@ target_link_libraries(
     "$<LINK_LIBRARY:FRAMEWORK,CoreMedia.framework>"
     "$<LINK_LIBRARY:FRAMEWORK,CoreVideo.framework>"
     "$<LINK_LIBRARY:FRAMEWORK,IOSurface.framework>"
+    "$<LINK_LIBRARY:FRAMEWORK,AVFoundation.framework>"
     "$<LINK_LIBRARY:WEAK_FRAMEWORK,ScreenCaptureKit.framework>"
 )
 

plugins/mac-capture/data/locale/en-US.ini

@@ -37,3 +37,5 @@ SCK.AudioUnavailable="Audio capture requires macOS 13 or newer."
 SCK.CaptureTypeUnavailable="Selected capture type requires macOS 13 or newer."
 SCK.Method="Method"
 SCK.Restart="Restart capture"
+Warning.Effect.Audio.VoiceIsolation="The macOS system effect 'Voice Isolation' is active on the selected device"
+Warning.Effect.Audio.WideSpectrum="The macOS system effect 'Wide Spectrum' is active on the selected device"

plugins/mac-capture/mac-audio.m

@@ -1,6 +1,7 @@
 #include <AudioUnit/AudioUnit.h>
 #include <CoreFoundation/CFString.h>
 #include <CoreAudio/CoreAudio.h>
+#include <AVFoundation/AVCaptureDevice.h>
 #include <unistd.h>
 #include <errno.h>
 
@@ -51,6 +52,8 @@
     enum speaker_layout speakers;
     bool enable_downmix;
 
+    char *effect_warning;
+
     pthread_t reconnect_thread;
     os_event_t *exit_event;
     volatile bool reconnecting;
@@ -996,6 +999,27 @@ static bool coreaudio_downmix_changed(void *data, obs_properties_t *props, obs_p
 
     obs_property_set_modified_callback2(property, coreaudio_device_changed, ca);
 
+    // This file is compiled as Objective-C so that we may more easily check this class property
+    if (@available(macOS 12.0, *)) {
+        AVCaptureMicrophoneMode activeMicrophoneMode = AVCaptureDevice.activeMicrophoneMode;
+        NSString *effectWarningKey = nil;
+        switch (activeMicrophoneMode) {
+            case AVCaptureMicrophoneModeStandard:
+                break;
+            case AVCaptureMicrophoneModeWideSpectrum:
+                effectWarningKey = @"Warning.Effect.Audio.WideSpectrum";
+                break;
+            case AVCaptureMicrophoneModeVoiceIsolation:
+                effectWarningKey = @"Warning.Effect.Audio.VoiceIsolation";
+                break;
+        }
+        if (effectWarningKey) {
+            property = obs_properties_add_text(props, "effect_warning", obs_module_text(effectWarningKey.UTF8String),
+                                               OBS_TEXT_INFO);
+            obs_property_text_set_info_type(property, OBS_TEXT_INFO_WARNING);
+        }
+    }
+
     property = obs_properties_add_bool(props, "enable_downmix", obs_module_text("CoreAudio.Downmix"));
     obs_property_set_modified_callback2(property, coreaudio_downmix_changed, ca);