From 995f6a6c0660d8ea78a772aacc83176d73806584 Mon Sep 17 00:00:00 2001
From: inotia00 <ars258000@gmail.com>
Date: Tue, 14 Mar 2023 10:41:57 +0900
Subject: [PATCH] add `protobuf-spoof` patch

---
 .../ProtobufParameterBuilderFingerprint.kt    | 13 ++++++
 .../fix/playback/patch/ProtobufSpoofPatch.kt  | 46 +++++++++++++++++++
 .../bytecode/patch/MicroGBytecodePatch.kt     |  4 +-
 3 files changed, 62 insertions(+), 1 deletion(-)
 create mode 100644 src/main/kotlin/app/revanced/patches/youtube/misc/fix/playback/fingerprints/ProtobufParameterBuilderFingerprint.kt
 create mode 100644 src/main/kotlin/app/revanced/patches/youtube/misc/fix/playback/patch/ProtobufSpoofPatch.kt

diff --git a/src/main/kotlin/app/revanced/patches/youtube/misc/fix/playback/fingerprints/ProtobufParameterBuilderFingerprint.kt b/src/main/kotlin/app/revanced/patches/youtube/misc/fix/playback/fingerprints/ProtobufParameterBuilderFingerprint.kt
new file mode 100644
index 000000000..393db9eb5
--- /dev/null
+++ b/src/main/kotlin/app/revanced/patches/youtube/misc/fix/playback/fingerprints/ProtobufParameterBuilderFingerprint.kt
@@ -0,0 +1,13 @@
+package app.revanced.patches.youtube.misc.fix.playback.fingerprints
+
+import app.revanced.patcher.fingerprint.method.impl.MethodFingerprint
+import org.jf.dexlib2.Opcode
+
+object ProtobufParameterBuilderFingerprint : MethodFingerprint(
+    opcodes = listOf(
+        Opcode.INVOKE_VIRTUAL_RANGE, // target reference
+        Opcode.MOVE_RESULT_OBJECT,
+        Opcode.IPUT_OBJECT
+    ),
+    strings = listOf("Unexpected empty videoId.", "Prefetch request are disabled.")
+)
\ No newline at end of file
diff --git a/src/main/kotlin/app/revanced/patches/youtube/misc/fix/playback/patch/ProtobufSpoofPatch.kt b/src/main/kotlin/app/revanced/patches/youtube/misc/fix/playback/patch/ProtobufSpoofPatch.kt
new file mode 100644
index 000000000..a7a515ef3
--- /dev/null
+++ b/src/main/kotlin/app/revanced/patches/youtube/misc/fix/playback/patch/ProtobufSpoofPatch.kt
@@ -0,0 +1,46 @@
+package app.revanced.patches.youtube.misc.fix.playback.patch
+
+import app.revanced.extensions.toErrorResult
+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.data.toMethodWalker
+import app.revanced.patcher.extensions.addInstruction
+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.patcher.util.proxy.mutableTypes.MutableMethod
+import app.revanced.patches.shared.annotation.YouTubeCompatibility
+import app.revanced.patches.youtube.misc.fix.playback.fingerprints.ProtobufParameterBuilderFingerprint
+
+@Patch
+@Name("protobuf-spoof")
+@Description("Spoofs the protobuf to prevent playback issues.")
+@YouTubeCompatibility
+@Version("0.0.1")
+class ProtobufSpoofPatch : BytecodePatch(
+    listOf(ProtobufParameterBuilderFingerprint)
+) {
+    override fun execute(context: BytecodeContext): PatchResult {
+
+        ProtobufParameterBuilderFingerprint.result?.let {
+            with (context
+                .toMethodWalker(it.method)
+                .nextMethod(it.scanResult.patternScanResult!!.startIndex, true)
+                .getMethod() as MutableMethod
+            ) {
+                val protobufParam = 3
+                val protobufParameter = "8AEByAMTuAQP" /* Protobuf Parameter of shorts */
+
+                addInstruction(
+                    0,
+                    "const-string p$protobufParam, \"$protobufParameter\""
+                )
+            }
+        } ?: return ProtobufParameterBuilderFingerprint.toErrorResult()
+
+        return PatchResultSuccess()
+    }
+}
diff --git a/src/main/kotlin/app/revanced/patches/youtube/misc/microg/bytecode/patch/MicroGBytecodePatch.kt b/src/main/kotlin/app/revanced/patches/youtube/misc/microg/bytecode/patch/MicroGBytecodePatch.kt
index 4910c56f0..b5a90fe73 100644
--- a/src/main/kotlin/app/revanced/patches/youtube/misc/microg/bytecode/patch/MicroGBytecodePatch.kt
+++ b/src/main/kotlin/app/revanced/patches/youtube/misc/microg/bytecode/patch/MicroGBytecodePatch.kt
@@ -11,6 +11,7 @@ import app.revanced.patches.shared.annotation.YouTubeCompatibility
 import app.revanced.patches.shared.patch.options.PatchOptions
 import app.revanced.patches.youtube.layout.player.castbutton.patch.HideCastButtonPatch
 import app.revanced.patches.youtube.misc.clientspoof.patch.ClientSpoofPatch
+import app.revanced.patches.youtube.misc.fix.playback.patch.ProtobufSpoofPatch
 import app.revanced.patches.youtube.misc.microg.bytecode.fingerprints.*
 import app.revanced.patches.youtube.misc.microg.shared.Constants.PACKAGE_NAME
 import app.revanced.util.bytecode.BytecodeHelper.injectInit
@@ -21,7 +22,8 @@ import app.revanced.util.microg.MicroGBytecodeHelper
     [
         ClientSpoofPatch::class,
         HideCastButtonPatch::class,
-        PatchOptions::class
+        PatchOptions::class,
+        ProtobufSpoofPatch::class
     ]
 )
 @YouTubeCompatibility