feat(Boost for Reddit): Add Fix audio missing in video downloads patch (#3287)

Co-authored-by: LisoUseInAIKyrios <118716522+LisoUseInAIKyrios@users.noreply.github.com>
Co-authored-by: oSumAtrIX <johan.melkonyan1@web.de>

api/revanced-patches.api

@@ -582,6 +582,12 @@ public final class app/revanced/patches/reddit/customclients/boostforreddit/api/
 	public fun patchUserAgent (Ljava/util/Set;Lapp/revanced/patcher/data/BytecodeContext;)V
 }
 
+public final class app/revanced/patches/reddit/customclients/boostforreddit/fix/downloads/FixAudioMissingInDownloadsPatch : app/revanced/patcher/patch/BytecodePatch {
+	public static final field INSTANCE Lapp/revanced/patches/reddit/customclients/boostforreddit/fix/downloads/FixAudioMissingInDownloadsPatch;
+	public fun execute (Lapp/revanced/patcher/data/BytecodeContext;)V
+	public synthetic fun execute (Lapp/revanced/patcher/data/Context;)V
+}
+
 public final class app/revanced/patches/reddit/customclients/boostforreddit/fix/slink/FixSLinksPatch : app/revanced/patches/reddit/customclients/BaseFixSLinksPatch {
 	public static final field INSTANCE Lapp/revanced/patches/reddit/customclients/boostforreddit/fix/slink/FixSLinksPatch;
 }

src/main/kotlin/app/revanced/patches/reddit/customclients/boostforreddit/fix/downloads/FixAudioMissingInDownloadsPatch.kt

@@ -0,0 +1,38 @@
+package app.revanced.patches.reddit.customclients.boostforreddit.fix.downloads
+
+import app.revanced.patcher.data.BytecodeContext
+import app.revanced.patcher.extensions.InstructionExtensions.getInstruction
+import app.revanced.patcher.extensions.InstructionExtensions.replaceInstruction
+import app.revanced.patcher.patch.BytecodePatch
+import app.revanced.patcher.patch.annotation.CompatiblePackage
+import app.revanced.patcher.patch.annotation.Patch
+import app.revanced.patches.reddit.customclients.boostforreddit.fix.downloads.fingerprints.DownloadAudioFingerprint
+import app.revanced.util.resultOrThrow
+import com.android.tools.smali.dexlib2.iface.instruction.OneRegisterInstruction
+
+@Patch(
+    name = "Fix missing audio in video downloads",
+    description = "Fixes audio missing in videos downloaded from v.redd.it.",
+    compatiblePackages = [CompatiblePackage("com.rubenmayayo.reddit")],
+)
+@Suppress("unused")
+object FixAudioMissingInDownloadsPatch : BytecodePatch(
+    setOf(DownloadAudioFingerprint),
+) {
+    private val endpointReplacements = mapOf(
+        "/DASH_audio.mp4" to "/DASH_AUDIO_128.mp4",
+        "/audio" to "/DASH_AUDIO_64.mp4",
+    )
+    override fun execute(context: BytecodeContext) {
+        DownloadAudioFingerprint.resultOrThrow().let { result ->
+            result.scanResult.stringsScanResult!!.matches.take(2).forEach { match ->
+                result.mutableMethod.apply {
+                    val replacement = endpointReplacements[match.string]
+                    val register = getInstruction<OneRegisterInstruction>(match.index).registerA
+
+                    replaceInstruction(match.index, "const-string v$register, \"$replacement\"")
+                }
+            }
+        }
+    }
+}

src/main/kotlin/app/revanced/patches/reddit/customclients/boostforreddit/fix/downloads/fingerprints/DownloadAudioFingerprint.kt

@@ -0,0 +1,7 @@
+package app.revanced.patches.reddit.customclients.boostforreddit.fix.downloads.fingerprints
+
+import app.revanced.patcher.fingerprint.MethodFingerprint
+
+internal object DownloadAudioFingerprint : MethodFingerprint(
+    strings = setOf("/DASH_audio.mp4", "/audio", "v.redd.it", "/"),
+)