Android: Add audio volume setting

Source/Android/app/src/main/java/org/dolphinemu/dolphinemu/features/settings/model/Settings.java

@@ -17,6 +17,7 @@
 {
   public static final String SECTION_INI_CORE = "Core";
   public static final String SECTION_INI_INTERFACE = "Interface";
+  public static final String SECTION_INI_DSP = "DSP";
 
   public static final String SECTION_GFX_SETTINGS = "Settings";
   public static final String SECTION_GFX_ENHANCEMENTS = "Enhancements";
@@ -41,8 +42,8 @@
   static
   {
     configFileSectionsMap.put(SettingsFile.FILE_NAME_DOLPHIN,
-            Arrays.asList(SECTION_INI_CORE, SECTION_INI_INTERFACE, SECTION_BINDINGS,
-                    SECTION_ANALYTICS, SECTION_DEBUG));
+            Arrays.asList(SECTION_INI_CORE, SECTION_INI_INTERFACE, SECTION_INI_DSP,
+                    SECTION_BINDINGS, SECTION_ANALYTICS, SECTION_DEBUG));
     configFileSectionsMap.put(SettingsFile.FILE_NAME_GFX,
             Arrays.asList(SECTION_GFX_SETTINGS, SECTION_GFX_ENHANCEMENTS, SECTION_GFX_HACKS,
                     SECTION_STEREOSCOPY));

Source/Android/app/src/main/java/org/dolphinemu/dolphinemu/features/settings/ui/SettingsFragmentPresenter.java

@@ -220,20 +220,23 @@ private void addGeneralSettings(ArrayList<SettingsItem> sl)
     Setting overclock = null;
     Setting speedLimit = null;
     Setting audioStretch = null;
+    Setting audioVolume = null;
     Setting overrideRegionSettings = null;
     Setting autoDiscChange = null;
     Setting analytics = null;
     Setting enableSaveState;
     Setting lockToLandscape;
 
     SettingSection coreSection = mSettings.getSection(Settings.SECTION_INI_CORE);
+    SettingSection dspSection = mSettings.getSection(Settings.SECTION_INI_DSP);
     SettingSection analyticsSection = mSettings.getSection(Settings.SECTION_ANALYTICS);
     cpuCore = coreSection.getSetting(SettingsFile.KEY_CPU_CORE);
     dualCore = coreSection.getSetting(SettingsFile.KEY_DUAL_CORE);
     overclockEnable = coreSection.getSetting(SettingsFile.KEY_OVERCLOCK_ENABLE);
     overclock = coreSection.getSetting(SettingsFile.KEY_OVERCLOCK_PERCENT);
     speedLimit = coreSection.getSetting(SettingsFile.KEY_SPEED_LIMIT);
     audioStretch = coreSection.getSetting(SettingsFile.KEY_AUDIO_STRETCH);
+    audioVolume = dspSection.getSetting(SettingsFile.KEY_AUDIO_VOLUME);
     overrideRegionSettings = coreSection.getSetting(SettingsFile.KEY_OVERRIDE_REGION_SETTINGS);
     autoDiscChange = coreSection.getSetting(SettingsFile.KEY_AUTO_DISC_CHANGE);
     analytics = analyticsSection.getSetting(SettingsFile.KEY_ANALYTICS_ENABLED);
@@ -275,6 +278,8 @@ else if (defaultCpuCore == 4)  // AArch64
             R.string.speed_limit, 0, 200, "%", 100, speedLimit));
     sl.add(new CheckBoxSetting(SettingsFile.KEY_AUDIO_STRETCH, Settings.SECTION_INI_CORE,
             R.string.audio_stretch, R.string.audio_stretch_description, false, audioStretch));
+    sl.add(new SliderSetting(SettingsFile.KEY_AUDIO_VOLUME, Settings.SECTION_INI_DSP,
+            R.string.audio_volume, 0, 100, "%", 100, audioVolume));
     sl.add(new CheckBoxSetting(SettingsFile.KEY_OVERRIDE_REGION_SETTINGS,
             Settings.SECTION_INI_CORE, R.string.override_region_settings, 0, false,
             overrideRegionSettings));

Source/Android/app/src/main/java/org/dolphinemu/dolphinemu/features/settings/utils/SettingsFile.java

@@ -47,6 +47,7 @@
   public static final String KEY_SPEED_LIMIT = "EmulationSpeed";
   public static final String KEY_VIDEO_BACKEND = "GFXBackend";
   public static final String KEY_AUDIO_STRETCH = "AudioStretch";
+  public static final String KEY_AUDIO_VOLUME = "Volume";
   public static final String KEY_AUTO_DISC_CHANGE = "AutoDiscChange";
   public static final String KEY_GAME_CUBE_LANGUAGE = "SelectedLanguage";
   public static final String KEY_OVERRIDE_REGION_SETTINGS = "OverrideRegionSettings";

Source/Android/app/src/main/res/values/strings.xml

@@ -153,6 +153,7 @@
     <string name="analytics">Enable usage statistics reporting</string>
     <string name="analytics_desc">If authorized, Dolphin can collect data on its performance, feature usage, and configuration, as well as data on your system\'s hardware and operating system.\n\nNo private data is ever collected. This data helps us understand how people and emulated games use Dolphin and prioritize our efforts. It also helps us identify rare configurations that are causing bugs, performance and stability issues. This authorization can be revoked at any time through Dolphin\'s settings.</string>
     <string name="gametdb_thanks">Thanks to GameTDB.com for providing GameCube and Wii covers!</string>
+    <string name="audio_volume">Audio Volume</string>
 
     <!-- Interface Preference Fragment -->
     <string name="interface_submenu">Interface</string>

Source/Core/AudioCommon/OpenSLESStream.cpp

@@ -3,15 +3,18 @@
 // Refer to the license.txt file included.
 
 #ifdef ANDROID
-#include <assert.h>
+#include "AudioCommon/OpenSLESStream.h"
+
+#include <cassert>
+#include <cmath>
 
 #include <SLES/OpenSLES.h>
 #include <SLES/OpenSLES_Android.h>
 
-#include "AudioCommon/OpenSLESStream.h"
 #include "Common/Assert.h"
 #include "Common/CommonTypes.h"
 #include "Common/Logging/Log.h"
+#include "Core/ConfigManager.h"
 
 // engine interfaces
 static SLObjectItf engineObject;
@@ -22,7 +25,6 @@ static SLObjectItf outputMixObject;
 static SLObjectItf bqPlayerObject = nullptr;
 static SLPlayItf bqPlayerPlay;
 static SLAndroidSimpleBufferQueueItf bqPlayerBufferQueue;
-static SLMuteSoloItf bqPlayerMuteSolo;
 static SLVolumeItf bqPlayerVolume;
 static Mixer* g_mixer;
 #define BUFFER_SIZE 512
@@ -94,6 +96,8 @@ bool OpenSLESStream::Init()
   result =
       (*bqPlayerObject)->GetInterface(bqPlayerObject, SL_IID_BUFFERQUEUE, &bqPlayerBufferQueue);
   assert(SL_RESULT_SUCCESS == result);
+  result = (*bqPlayerObject)->GetInterface(bqPlayerObject, SL_IID_VOLUME, &bqPlayerVolume);
+  assert(SL_RESULT_SUCCESS == result);
   result = (*bqPlayerBufferQueue)->RegisterCallback(bqPlayerBufferQueue, bqPlayerCallback, nullptr);
   assert(SL_RESULT_SUCCESS == result);
   result = (*bqPlayerPlay)->SetPlayState(bqPlayerPlay, SL_PLAYSTATE_PLAYING);
@@ -118,7 +122,6 @@ OpenSLESStream::~OpenSLESStream()
     bqPlayerObject = nullptr;
     bqPlayerPlay = nullptr;
     bqPlayerBufferQueue = nullptr;
-    bqPlayerMuteSolo = nullptr;
     bqPlayerVolume = nullptr;
   }
 
@@ -135,4 +138,11 @@ OpenSLESStream::~OpenSLESStream()
     engineEngine = nullptr;
   }
 }
+
+void OpenSLESStream::SetVolume(int volume)
+{
+  const SLmillibel attenuation =
+      volume <= 0 ? SL_MILLIBEL_MIN : static_cast<SLmillibel>(2000 * std::log10(volume / 100.0f));
+  (*bqPlayerVolume)->SetVolumeLevel(bqPlayerVolume, attenuation);
+}
 #endif

Source/Core/AudioCommon/OpenSLESStream.h

@@ -16,6 +16,7 @@ class OpenSLESStream final : public SoundStream
   ~OpenSLESStream() override;
   bool Init() override;
   bool SetRunning(bool running) override { return running; }
+  void SetVolume(int volume) override;
   static bool isValid() { return true; }
 
 private: