feat(twitch): block-video-ads patch (#1040)

Co-authored-by: oSumAtrIX <johan.melkonyan1@web.de>

src/main/kotlin/app/revanced/patches/twitch/ad/video/annotations/VideoAdsCompatibility.kt

@@ -0,0 +1,10 @@
+package app.revanced.patches.twitch.ad.video.annotations
+
+import app.revanced.patcher.annotation.Compatibility
+import app.revanced.patcher.annotation.Package
+
+@Compatibility([Package("tv.twitch.android.app")])
+@Target(AnnotationTarget.CLASS)
+@Retention(AnnotationRetention.RUNTIME)
+internal annotation class VideoAdsCompatibility
+

src/main/kotlin/app/revanced/patches/twitch/ad/video/fingerprints/AdsManagerFingerprint.kt

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+package app.revanced.patches.twitch.ad.video.fingerprints
+
+import app.revanced.patcher.annotation.Name
+import app.revanced.patcher.annotation.Version
+
+import app.revanced.patcher.fingerprint.method.impl.MethodFingerprint
+import app.revanced.patches.twitch.ad.video.annotations.VideoAdsCompatibility
+
+@Name("ads-manager-play-fingerprint")
+@VideoAdsCompatibility
+@Version("0.0.1")
+object AdsManagerFingerprint : MethodFingerprint(
+    customFingerprint = { method ->
+        method.definingClass.endsWith("AdsManagerImpl;") && method.name == "playAds"
+    }
+)

src/main/kotlin/app/revanced/patches/twitch/ad/video/fingerprints/CheckAdEligibilityLambdaFingerprint.kt

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+package app.revanced.patches.twitch.ad.video.fingerprints
+
+import app.revanced.patcher.annotation.Name
+import app.revanced.patcher.annotation.Version
+import app.revanced.patcher.extensions.or
+
+import app.revanced.patcher.fingerprint.method.impl.MethodFingerprint
+import app.revanced.patches.twitch.ad.video.annotations.VideoAdsCompatibility
+import org.jf.dexlib2.AccessFlags
+
+@Name("check-ad-eligibility-fingerprint")
+@VideoAdsCompatibility
+@Version("0.0.1")
+object CheckAdEligibilityLambdaFingerprint : MethodFingerprint(
+    "L",
+    AccessFlags.PRIVATE or AccessFlags.FINAL or AccessFlags.STATIC,
+    listOf("L", "L", "L"),
+    customFingerprint = { method ->
+        method.definingClass.endsWith("AdEligibilityFetcher;") &&
+                method.name.contains("shouldRequestAd")
+    }
+)

src/main/kotlin/app/revanced/patches/twitch/ad/video/fingerprints/ContentConfigShowAdsFingerprint.kt

@@ -0,0 +1,16 @@
+package app.revanced.patches.twitch.ad.video.fingerprints
+
+import app.revanced.patcher.annotation.Name
+import app.revanced.patcher.annotation.Version
+
+import app.revanced.patcher.fingerprint.method.impl.MethodFingerprint
+import app.revanced.patches.twitch.ad.video.annotations.VideoAdsCompatibility
+
+@Name("content-config-show-ads-fingerprint")
+@VideoAdsCompatibility
+@Version("0.0.1")
+object ContentConfigShowAdsFingerprint : MethodFingerprint(
+    customFingerprint = { method ->
+        method.definingClass.endsWith("ContentConfigData;") && method.name == "getShowAds"
+    }
+)

src/main/kotlin/app/revanced/patches/twitch/ad/video/patch/VideoAdsPatch.kt

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+package app.revanced.patches.twitch.ad.video.patch
+
+import app.revanced.patcher.annotation.Description
+import app.revanced.patcher.annotation.Name
+import app.revanced.patcher.annotation.Version
+import app.revanced.patcher.data.BytecodeContext
+import app.revanced.patcher.extensions.addInstruction
+import app.revanced.patcher.extensions.addInstructions
+import app.revanced.patcher.patch.BytecodePatch
+import app.revanced.patcher.patch.PatchResult
+import app.revanced.patcher.patch.PatchResultSuccess
+import app.revanced.patcher.patch.annotations.Patch
+import app.revanced.patches.twitch.ad.video.annotations.VideoAdsCompatibility
+import app.revanced.patches.twitch.ad.video.fingerprints.AdsManagerFingerprint
+import app.revanced.patches.twitch.ad.video.fingerprints.CheckAdEligibilityLambdaFingerprint
+import app.revanced.patches.twitch.ad.video.fingerprints.ContentConfigShowAdsFingerprint
+
+@Patch
+@Name("block-video-ads")
+@Description("Blocks video ads in streams and VODs.")
+@VideoAdsCompatibility
+@Version("0.0.1")
+class VideoAdsPatch : BytecodePatch(
+    listOf(
+        ContentConfigShowAdsFingerprint,
+        AdsManagerFingerprint,
+        CheckAdEligibilityLambdaFingerprint
+    )
+) {
+    override fun execute(context: BytecodeContext): PatchResult {
+        // Pretend our player is ineligible for all ads
+        with(CheckAdEligibilityLambdaFingerprint.result!!) {
+            mutableMethod.addInstructions(
+                0,
+                """
+                    const/4 v0, 0
+                    invoke-static {v0}, Lio/reactivex/Single;->just(Ljava/lang/Object;)Lio/reactivex/Single;
+                    move-result-object p0
+                    return-object p0
+                """
+            )
+        }
+
+        // Spoof showAds JSON field
+        with(ContentConfigShowAdsFingerprint.result!!) {
+            mutableMethod.addInstructions(0, """
+                    const/4 v0, 0
+                    return v0
+                """
+            )
+        }
+
+        // Block playAds call
+        with(AdsManagerFingerprint.result!!) {
+            mutableMethod.addInstruction(0, "return-void")
+        }
+
+        return PatchResultSuccess()
+    }
+}