Add possibility to disable audio output

app/src/main/cpp/skyline/audio.cpp

@@ -5,6 +5,8 @@
 
 namespace skyline::audio {
     Audio::Audio(const DeviceState &state) : oboe::AudioStreamCallback() {
+        settings = std::shared_ptr<Settings>{state.settings};
+
         builder.setChannelCount(constant::StereoChannelCount);
         builder.setSampleRate(constant::SampleRate);
         builder.setFormat(constant::PcmFormat);
@@ -50,6 +52,7 @@ namespace skyline::audio {
 
                 std::scoped_lock bufferGuard{track->bufferLock};
 
+                if (!*settings->isAudioOutputDisabled) {
                     auto trackSamples{track->samples.Read(span(destBuffer, streamSamples), [](i16 *source, i16 *destination) {
                         *destination = Saturate<i16, i32>(static_cast<u32>(*destination) + static_cast<u32>(*source));
                     }, static_cast<ssize_t>(writtenSamples))};
@@ -57,6 +60,9 @@ namespace skyline::audio {
                     writtenSamples = std::max(trackSamples, writtenSamples);
 
                     track->sampleCounter += trackSamples;
+                } else {
+                    track->sampleCounter += streamSamples;
+                }
                 track->CheckReleasedBuffers();
             }
         }

app/src/main/cpp/skyline/audio.h

@@ -3,6 +3,7 @@
 
 #pragma once
 
+#include <common/settings.h>
 #include <audio/track.h>
 
 namespace skyline::audio {
@@ -15,6 +16,7 @@ namespace skyline::audio {
         oboe::ManagedStream outputStream;
         std::vector<std::shared_ptr<AudioTrack>> audioTracks;
         std::mutex trackLock; //!< Synchronizes modifications to the audio tracks
+        std::shared_ptr<Settings> settings;
 
       public:
         Audio(const DeviceState &state);

app/src/main/cpp/skyline/common/android_settings.h

@@ -41,6 +41,7 @@ namespace skyline {
             gpuDriverLibraryName = ktSettings.GetString("gpuDriverLibraryName");
             executorSlotCount = ktSettings.GetInt<u32>("executorSlotCount");
             enableTextureReadbackHack = ktSettings.GetBool("enableTextureReadbackHack");
+            isAudioOutputDisabled = ktSettings.GetBool("isAudioOutputDisabled");
             validationLayer = ktSettings.GetBool("validationLayer");
         };
     };

app/src/main/cpp/skyline/common/settings.h

@@ -74,6 +74,9 @@ namespace skyline {
         Setting<u32> executorSlotCount; //!< Number of GPU executor slots that can be used concurrently
         Setting<bool> enableTextureReadbackHack; //!< If the CPU texture readback skipping hack should be used
 
+        // Audio
+        Setting<bool> isAudioOutputDisabled; //!< Disables audio output
+
         // Debug
         Setting<bool> validationLayer; //!< If the vulkan validation layer is enabled
 

app/src/main/cpp/skyline/services/audio/IAudioRenderer/IAudioRenderer.cpp

@@ -1,6 +1,7 @@
 // SPDX-License-Identifier: MPL-2.0
 // Copyright © 2020 Skyline Team and Contributors (https://github.com/skyline-emu/)
 
+#include <common/settings.h>
 #include <kernel/types/KProcess.h>
 #include "IAudioRenderer.h"
 
@@ -68,6 +69,7 @@ namespace skyline::service::audio::IAudioRenderer {
         for (u32 i{}; i < effectsIn.size(); i++)
             effects[i].ProcessInput(effectsIn[i]);
 
+        if (!*state.settings->isAudioOutputDisabled)
             UpdateAudio();
 
         UpdateDataHeader outputHeader{

app/src/main/java/emu/skyline/utils/NativeSettings.kt

@@ -28,6 +28,9 @@ class NativeSettings(context : Context, pref : PreferenceSettings) {
     var executorSlotCount : Int = pref.executorSlotCount
     var enableTextureReadbackHack : Boolean = pref.enableTextureReadbackHack
 
+    // Audio
+    var isAudioOutputDisabled : Boolean = pref.isAudioOutputDisabled
+
     // Debug
     var validationLayer : Boolean = BuildConfig.BUILD_TYPE != "release" && pref.validationLayer
 

app/src/main/java/emu/skyline/utils/PreferenceSettings.kt

@@ -41,6 +41,9 @@ class PreferenceSettings @Inject constructor(@ApplicationContext private val con
     var executorSlotCount by sharedPreferences(context, 6)
     var enableTextureReadbackHack by sharedPreferences(context, false)
 
+    // Audio
+    var isAudioOutputDisabled by sharedPreferences(context, false)
+
     // Debug
     var validationLayer by sharedPreferences(context, false)
 

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

@@ -78,6 +78,11 @@
     <string name="enable_texture_readback_hack">Enable Texture Readback Hack</string>
     <string name="enable_texture_readback_hack_enabled">Texture readback hack is enabled (Will break some games but others will have higher performance)</string>
     <string name="enable_texture_readback_hack_disabled">Texture readback hack is disabled (Ensures highest accuracy)</string>
+    <!-- Settings - Audio -->
+    <string name="audio">Audio</string>
+    <string name="disable_audio_output">Disable Audio Output</string>
+    <string name="disable_audio_output_enabled">Audio output is disabled</string>
+    <string name="disable_audio_output_disabled">Audio output is enabled</string>
     <!-- Settings - Debug -->
     <string name="debug">Debug</string>
     <string name="validation_layer">Enable validation layer</string>

app/src/main/res/xml/preferences.xml

@@ -142,6 +142,17 @@
             app:key="enable_texture_readback_hack"
             app:title="@string/enable_texture_readback_hack" />
     </PreferenceCategory>
+    <PreferenceCategory
+        android:key="category_audio"
+        android:title="@string/audio"
+        app:isPreferenceVisible="true">
+        <CheckBoxPreference
+            android:defaultValue="false"
+            android:summaryOff="@string/disable_audio_output_disabled"
+            android:summaryOn="@string/disable_audio_output_enabled"
+            app:key="is_audio_output_disabled"
+            app:title="@string/disable_audio_output" />
+    </PreferenceCategory>
     <PreferenceCategory
         android:key="category_debug"
         android:title="@string/debug"