fix(YouTube - Spoof client): show video time and chapters while using seekbar (#2607)

src/main/kotlin/app/revanced/patches/youtube/misc/fix/playback/fingerprints/ScrubbedPreviewLayoutFingerprint.kt

@@ -0,0 +1,27 @@
+package app.revanced.patches.youtube.misc.fix.playback.fingerprints
+
+import app.revanced.patcher.extensions.or
+import app.revanced.patches.youtube.misc.fix.playback.patch.SpoofSignatureVerificationResourcePatch
+import app.revanced.util.patch.LiteralValueFingerprint
+import org.jf.dexlib2.AccessFlags
+import org.jf.dexlib2.Opcode
+
+object ScrubbedPreviewLayoutFingerprint : LiteralValueFingerprint(
+    accessFlags = AccessFlags.PRIVATE or AccessFlags.FINAL,
+    returnType = "V",
+    parameters = listOf("Landroid/content/Context;", "Landroid/util/AttributeSet;", "I", "I"),
+    opcodes = listOf(
+        Opcode.INVOKE_STATIC,
+        Opcode.MOVE_RESULT_OBJECT,
+        Opcode.INVOKE_VIRTUAL,
+        Opcode.MOVE_RESULT,
+        Opcode.INVOKE_VIRTUAL,
+        Opcode.CONST,
+        Opcode.INVOKE_VIRTUAL,
+        Opcode.MOVE_RESULT_OBJECT,
+        Opcode.CHECK_CAST,
+        Opcode.IPUT_OBJECT, // preview imageview
+    ),
+    // This resource is used in ~ 40 different locations, but this method has a distinct list of parameters to match to.
+    literal = SpoofSignatureVerificationResourcePatch.scrubbedPreviewThumbnailResourceId
+)

src/main/kotlin/app/revanced/patches/youtube/misc/fix/playback/fingerprints/StoryboardThumbnailFingerprint.kt

@@ -0,0 +1,23 @@
+package app.revanced.patches.youtube.misc.fix.playback.fingerprints
+
+import app.revanced.patcher.extensions.or
+import app.revanced.patcher.fingerprint.method.impl.MethodFingerprint
+import org.jf.dexlib2.AccessFlags
+import org.jf.dexlib2.Opcode
+
+/**
+ * Resolves using the class found in [StoryboardThumbnailParentFingerprint].
+ */
+object StoryboardThumbnailFingerprint : MethodFingerprint(
+    accessFlags = AccessFlags.PUBLIC or AccessFlags.FINAL,
+    returnType = "Z",
+    parameters = listOf(),
+    opcodes = listOf(
+        Opcode.MOVE_RESULT,
+        Opcode.IF_GTZ,
+        Opcode.GOTO,
+        Opcode.CONST_4,
+        Opcode.RETURN,
+        Opcode.RETURN, // Last instruction of method.
+    ),
+)

src/main/kotlin/app/revanced/patches/youtube/misc/fix/playback/fingerprints/StoryboardThumbnailParentFingerprint.kt

@@ -0,0 +1,17 @@
+package app.revanced.patches.youtube.misc.fix.playback.fingerprints
+
+import app.revanced.patcher.extensions.or
+import app.revanced.patcher.fingerprint.method.impl.MethodFingerprint
+import org.jf.dexlib2.AccessFlags
+
+/**
+ * Here lies code that creates the seekbar thumbnails.
+ *
+ * An additional change here might force the thumbnails to be created,
+ * or possibly a change somewhere else (maybe involving YouTube 18.23.35 class `hte`)
+ */
+object StoryboardThumbnailParentFingerprint : MethodFingerprint(
+    accessFlags = AccessFlags.PUBLIC or AccessFlags.FINAL,
+    returnType = "Landroid/graphics/Bitmap;",
+    strings = listOf("Storyboard regionDecoder.decodeRegion exception - "),
+)

src/main/kotlin/app/revanced/patches/youtube/misc/fix/playback/fingerprints/UserAgentHeaderBuilderFingerprint.kt

@@ -1,6 +1,5 @@
 package app.revanced.patches.youtube.misc.fix.playback.fingerprints
 
-
 import app.revanced.patcher.fingerprint.method.impl.MethodFingerprint
 import org.jf.dexlib2.Opcode
 

src/main/kotlin/app/revanced/patches/youtube/misc/fix/playback/patch/SpoofSignatureVerificationPatch.kt

@@ -7,47 +7,35 @@ import app.revanced.patcher.annotation.Version
 import app.revanced.patcher.data.BytecodeContext
 import app.revanced.patcher.data.toMethodWalker
 import app.revanced.patcher.extensions.InstructionExtensions.addInstructions
+import app.revanced.patcher.extensions.InstructionExtensions.getInstruction
+import app.revanced.patcher.extensions.InstructionExtensions.replaceInstruction
+import app.revanced.patcher.fingerprint.method.impl.MethodFingerprint.Companion.resolve
 import app.revanced.patcher.patch.BytecodePatch
 import app.revanced.patcher.patch.PatchResult
 import app.revanced.patcher.patch.PatchResultSuccess
 import app.revanced.patcher.patch.annotations.DependsOn
 import app.revanced.patcher.util.proxy.mutableTypes.MutableMethod
-import app.revanced.patches.shared.settings.preference.impl.StringResource
-import app.revanced.patches.shared.settings.preference.impl.SwitchPreference
-import app.revanced.patches.youtube.misc.fix.playback.fingerprints.ProtobufParameterBuilderFingerprint
+import app.revanced.patches.youtube.misc.fix.playback.fingerprints.*
 import app.revanced.patches.youtube.misc.integrations.patch.IntegrationsPatch
 import app.revanced.patches.youtube.misc.playertype.patch.PlayerTypeHookPatch
-import app.revanced.patches.youtube.misc.settings.bytecode.patch.SettingsPatch
+import org.jf.dexlib2.iface.instruction.ReferenceInstruction
 
 @Name("Spoof signature verification")
 @Description("Spoofs a patched client to prevent playback issues.")
 @DependsOn([
+    SpoofSignatureVerificationResourcePatch::class,
     IntegrationsPatch::class,
-    SettingsPatch::class,
-    PlayerTypeHookPatch::class,
+    PlayerTypeHookPatch::class
 ])
 @Version("0.0.1")
 class SpoofSignatureVerificationPatch : BytecodePatch(
     listOf(
         ProtobufParameterBuilderFingerprint,
+        StoryboardThumbnailParentFingerprint,
+        ScrubbedPreviewLayoutFingerprint,
     )
 ) {
     override fun execute(context: BytecodeContext): PatchResult {
-        SettingsPatch.PreferenceScreen.MISC.addPreferences(
-            SwitchPreference(
-                "revanced_spoof_signature_verification",
-                StringResource("revanced_spoof_signature_verification_title", "Spoof app signature"),
-                StringResource("revanced_spoof_signature_verification_summary_on",
-                    "App signature spoofed\\n\\n"
-                        + "Side effects include:\\n"
-                        + "• Ambient mode may not work\\n"
-                        + "• Seekbar thumbnails are hidden\\n"
-                        + "• Downloading videos may not work"),
-                StringResource("revanced_spoof_signature_verification_summary_off", "App signature not spoofed"),
-                StringResource("revanced_spoof_signature_verification_user_dialog_message",
-                    "Turning off this setting may cause playback issues.")
-            )
-        )
 
         // hook parameter
         ProtobufParameterBuilderFingerprint.result?.let {
@@ -68,6 +56,53 @@ class SpoofSignatureVerificationPatch : BytecodePatch(
             }
         } ?: return ProtobufParameterBuilderFingerprint.toErrorResult()
 
+
+        // When signature spoofing is enabled, the seekbar when tapped does not show
+        // the video time, chapter names, or the video thumbnail.
+        // Changing the value returned of this method forces all of these to show up,
+        // except the thumbnails are blank, which is handled with the patch below.
+        StoryboardThumbnailParentFingerprint.result ?: return StoryboardThumbnailParentFingerprint.toErrorResult()
+        StoryboardThumbnailFingerprint.resolve(context, StoryboardThumbnailParentFingerprint.result!!.classDef)
+        StoryboardThumbnailFingerprint.result?.apply {
+            val endIndex = scanResult.patternScanResult!!.endIndex
+            // Replace existing instruction to preserve control flow label.
+            // The replaced return instruction always returns false
+            // (it is the 'no thumbnails found' control path),
+            // so there is no need to pass the existing return value to integrations.
+            mutableMethod.replaceInstruction(
+                endIndex,
+                """
+                    invoke-static {}, $INTEGRATIONS_CLASS_DESCRIPTOR->getSeekbarThumbnailOverrideValue()Z
+                """
+            )
+            // Since this is end of the method must replace one line then add the rest.
+            mutableMethod.addInstructions(
+                endIndex + 1,
+                """
+                move-result v0
+                return v0
+            """
+            )
+        } ?: return StoryboardThumbnailFingerprint.toErrorResult()
+
+
+        // Seekbar thumbnail now show up but are always a blank image.
+        // Additional changes are needed to force the client to generate the thumbnails (assuming it's possible),
+        // but for now hide the empty thumbnail.
+        ScrubbedPreviewLayoutFingerprint.result?.apply {
+            val endIndex = scanResult.patternScanResult!!.endIndex
+            mutableMethod.apply {
+                val imageViewFieldName = getInstruction<ReferenceInstruction>(endIndex).reference
+                addInstructions(
+                    implementation!!.instructions.lastIndex,
+                    """
+                        iget-object v0, p0, $imageViewFieldName   # copy imageview field to a register
+                        invoke-static {v0}, $INTEGRATIONS_CLASS_DESCRIPTOR->seekbarImageViewCreated(Landroid/widget/ImageView;)V
+                """
+                )
+            }
+        } ?: return ScrubbedPreviewLayoutFingerprint.toErrorResult()
+
         return PatchResultSuccess()
     }
 

src/main/kotlin/app/revanced/patches/youtube/misc/fix/playback/patch/SpoofSignatureVerificationResourcePatch.kt

@@ -0,0 +1,44 @@
+package app.revanced.patches.youtube.misc.fix.playback.patch
+
+import app.revanced.patcher.data.ResourceContext
+import app.revanced.patcher.patch.PatchResult
+import app.revanced.patcher.patch.PatchResultSuccess
+import app.revanced.patcher.patch.ResourcePatch
+import app.revanced.patcher.patch.annotations.DependsOn
+import app.revanced.patches.shared.mapping.misc.patch.ResourceMappingPatch
+import app.revanced.patches.shared.settings.preference.impl.StringResource
+import app.revanced.patches.shared.settings.preference.impl.SwitchPreference
+import app.revanced.patches.youtube.misc.fix.playback.fingerprints.*
+import app.revanced.patches.youtube.misc.settings.bytecode.patch.SettingsPatch
+
+@DependsOn([SettingsPatch::class, ResourceMappingPatch::class])
+class SpoofSignatureVerificationResourcePatch : ResourcePatch {
+
+    override fun execute(context: ResourceContext): PatchResult {
+        SettingsPatch.PreferenceScreen.MISC.addPreferences(
+            SwitchPreference(
+                "revanced_spoof_signature_verification",
+                StringResource("revanced_spoof_signature_verification_title", "Spoof app signature"),
+                StringResource("revanced_spoof_signature_verification_summary_on",
+                    "App signature spoofed\\n\\n"
+                        + "Side effects include:\\n"
+                        + "• Ambient mode may not work\\n"
+                        + "• Seekbar thumbnails are hidden\\n"
+                        + "• Downloading videos may not work"),
+                StringResource("revanced_spoof_signature_verification_summary_off", "App signature not spoofed"),
+                StringResource("revanced_spoof_signature_verification_user_dialog_message",
+                    "Turning off this setting may cause playback issues.")
+            )
+        )
+
+        scrubbedPreviewThumbnailResourceId = ResourceMappingPatch.resourceMappings.single {
+            it.type == "id" && it.name == "thumbnail"
+        }.id
+
+        return PatchResultSuccess()
+    }
+
+    companion object {
+        var scrubbedPreviewThumbnailResourceId: Long = -1
+    }
+}