feat(YouTube Music): Add Force original audio patch (#6036)

extensions/shared/library/src/main/java/app/revanced/extension/shared/patches/ForceOriginalAudioPatch.java

@@ -0,0 +1,73 @@
+package app.revanced.extension.shared.patches;
+
+import app.revanced.extension.shared.Logger;
+import app.revanced.extension.shared.settings.AppLanguage;
+import app.revanced.extension.shared.spoof.ClientType;
+import app.revanced.extension.shared.spoof.SpoofVideoStreamsPatch;
+
+@SuppressWarnings("unused")
+public class ForceOriginalAudioPatch {
+
+    private static final String DEFAULT_AUDIO_TRACKS_SUFFIX = ".4";
+
+    private static volatile boolean enabled = false;
+
+    public static void setEnabled(boolean isEnabled, ClientType client) {
+        enabled = isEnabled;
+
+        if (isEnabled
+                && SpoofVideoStreamsPatch.spoofingToClientWithNoMultiAudioStreams()
+                && !client.useAuth) {
+            // If client spoofing does not use authentication and lacks multi-audio streams,
+            // then can use any language code for the request and if that requested language is
+            // not available YT uses the original audio language. Authenticated requests ignore
+            // the language code and always use the account language. Use a language that is
+            // not auto-dubbed by YouTube: https://support.google.com/youtube/answer/15569972
+            // but the language is also supported natively by the Meta Quest device that
+            // Android VR is spoofing.
+            AppLanguage override = AppLanguage.NB; // Norwegian Bokmal.
+            Logger.printDebug(() -> "Setting language override: " + override);
+            SpoofVideoStreamsPatch.setLanguageOverride(override);
+        }
+    }
+
+    /**
+     * Injection point.
+     */
+    public static boolean ignoreDefaultAudioStream(boolean original) {
+        if (enabled) {
+            return false;
+        }
+        return original;
+    }
+
+    /**
+     * Injection point.
+     */
+    public static boolean isDefaultAudioStream(boolean isDefault, String audioTrackId, String audioTrackDisplayName) {
+        try {
+            if (!enabled) {
+                return isDefault;
+            }
+
+            if (audioTrackId.isEmpty()) {
+                // Older app targets can have empty audio tracks and these might be placeholders.
+                // The real audio tracks are called after these.
+                return isDefault;
+            }
+
+            Logger.printDebug(() -> "default: " + String.format("%-5s", isDefault) + " id: "
+                    + String.format("%-8s", audioTrackId) + " name:" + audioTrackDisplayName);
+
+            final boolean isOriginal = audioTrackId.endsWith(DEFAULT_AUDIO_TRACKS_SUFFIX);
+            if (isOriginal) {
+                Logger.printDebug(() -> "Using audio: " + audioTrackId);
+            }
+
+            return isOriginal;
+        } catch (Exception ex) {
+            Logger.printException(() -> "isDefaultAudioStream failure", ex);
+            return isDefault;
+        }
+    }
+}

extensions/shared/library/src/main/java/app/revanced/extension/shared/settings/preference/ForceOriginalAudioSwitchPreference.java

@@ -0,0 +1,63 @@
+package app.revanced.extension.shared.settings.preference;
+
+import static app.revanced.extension.shared.StringRef.str;
+
+import android.content.Context;
+import android.preference.SwitchPreference;
+import android.util.AttributeSet;
+
+import app.revanced.extension.shared.settings.BaseSettings;
+import app.revanced.extension.shared.spoof.ClientType;
+import app.revanced.extension.shared.spoof.SpoofVideoStreamsPatch;
+
+@SuppressWarnings({"deprecation", "unused"})
+public class ForceOriginalAudioSwitchPreference extends SwitchPreference {
+
+    // Spoof stream patch is not included, or is not currently spoofing to Android Studio.
+    private static final boolean available = !SpoofVideoStreamsPatch.isPatchIncluded()
+            || !(BaseSettings.SPOOF_VIDEO_STREAMS.get()
+            && SpoofVideoStreamsPatch.getPreferredClient() == ClientType.ANDROID_CREATOR);
+
+    {
+        if (!available) {
+            // Show why force audio is not available.
+            String summary = str("revanced_force_original_audio_not_available");
+            super.setSummary(summary);
+            super.setSummaryOn(summary);
+            super.setSummaryOff(summary);
+            super.setEnabled(false);
+        }
+    }
+
+    public ForceOriginalAudioSwitchPreference(Context context, AttributeSet attrs, int defStyleAttr, int defStyleRes) {
+        super(context, attrs, defStyleAttr, defStyleRes);
+    }
+    public ForceOriginalAudioSwitchPreference(Context context, AttributeSet attrs, int defStyleAttr) {
+        super(context, attrs, defStyleAttr);
+    }
+    public ForceOriginalAudioSwitchPreference(Context context, AttributeSet attrs) {
+        super(context, attrs);
+    }
+    public ForceOriginalAudioSwitchPreference(Context context) {
+        super(context);
+    }
+
+    @Override
+    public void setEnabled(boolean enabled) {
+        if (!available) {
+            return;
+        }
+
+        super.setEnabled(enabled);
+    }
+
+    @Override
+    public void setSummary(CharSequence summary) {
+        if (!available) {
+            return;
+        }
+
+        super.setSummary(summary);
+    }
+}
+

extensions/shared/library/src/main/java/app/revanced/extension/shared/spoof/SpoofVideoStreamsPatch.java

@@ -66,6 +66,10 @@ public class SpoofVideoStreamsPatch {
         StreamingDataRequest.setClientOrderToUse(availableClients, client);
     }
 
+    public static ClientType getPreferredClient() {
+        return preferredClient;
+    }
+
     public static boolean spoofingToClientWithNoMultiAudioStreams() {
         return isPatchIncluded()
                 && SPOOF_STREAMING_DATA