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feat(Sync for Reddit): Add Fix video downloads patch (#3739)
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Co-authored-by: oSumAtrIX <[email protected]>
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1fexd and oSumAtrIX authored Oct 17, 2024
1 parent 085db40 commit a47ee38
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6 changes: 6 additions & 0 deletions api/revanced-patches.api
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Expand Up @@ -840,6 +840,12 @@ public final class app/revanced/patches/reddit/customclients/syncforreddit/fix/u
public synthetic fun execute (Lapp/revanced/patcher/data/Context;)V
}

public final class app/revanced/patches/reddit/customclients/syncforreddit/fix/video/FixVideoDownloadsPatch : app/revanced/patcher/patch/BytecodePatch {
public static final field INSTANCE Lapp/revanced/patches/reddit/customclients/syncforreddit/fix/video/FixVideoDownloadsPatch;
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/syncforreddit/misc/integrations/IntegrationsPatch : app/revanced/patches/shared/misc/integrations/BaseIntegrationsPatch {
public static final field INSTANCE Lapp/revanced/patches/reddit/customclients/syncforreddit/misc/integrations/IntegrationsPatch;
}
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@@ -0,0 +1,62 @@
package app.revanced.patches.reddit.customclients.syncforreddit.fix.video

import app.revanced.patcher.data.BytecodeContext
import app.revanced.patcher.extensions.InstructionExtensions.addInstructions
import app.revanced.patcher.extensions.InstructionExtensions.getInstruction
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.syncforreddit.fix.video.fingerprints.ParseRedditVideoNetworkResponseFingerprint
import app.revanced.util.resultOrThrow
import com.android.tools.smali.dexlib2.iface.instruction.formats.Instruction35c

@Patch(
name = "Fix video downloads",
description = "Fixes a bug in Sync's MPD parser resulting in only the audio-track being saved.",
compatiblePackages = [
CompatiblePackage("com.laurencedawson.reddit_sync"),
CompatiblePackage("com.laurencedawson.reddit_sync.pro"),
CompatiblePackage("com.laurencedawson.reddit_sync.dev"),
],
requiresIntegrations = true,
)
@Suppress("unused")
object FixVideoDownloadsPatch : BytecodePatch(
fingerprints = setOf(ParseRedditVideoNetworkResponseFingerprint),
) {
private const val INTEGRATIONS_CLASS_DESCRIPTOR =
"Lapp/revanced/integrations/syncforreddit/FixRedditVideoDownloadPatch;"
private const val GET_LINKS_METHOD = "getLinks([B)[Ljava/lang/String;"

override fun execute(context: BytecodeContext) {
ParseRedditVideoNetworkResponseFingerprint.resultOrThrow().let {
val scanResult = it.scanResult.patternScanResult!!
val newInstanceIndex = scanResult.startIndex
val invokeDirectIndex = scanResult.endIndex - 1

val buildResponseInstruction = it.mutableMethod.getInstruction<Instruction35c>(invokeDirectIndex)

it.mutableMethod.addInstructions(
newInstanceIndex + 1,
"""
# Get byte array from response.
iget-object v2, p1, Lcom/android/volley/NetworkResponse;->data:[B
# Parse the videoUrl and audioUrl from the byte array.
invoke-static { v2 }, $INTEGRATIONS_CLASS_DESCRIPTOR->$GET_LINKS_METHOD
move-result-object v2
# Get videoUrl (Index 0).
const/4 v5, 0x0
aget-object v${buildResponseInstruction.registerE}, v2, v5
# Get audioUrl (Index 1).
const/4 v6, 0x1
aget-object v${buildResponseInstruction.registerF}, v2, v6
# Register E and F are used to build the response.
""",
)
}
}
}
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package app.revanced.patches.reddit.customclients.syncforreddit.fix.video.fingerprints

import app.revanced.patcher.fingerprint.MethodFingerprint
import com.android.tools.smali.dexlib2.Opcode

internal object ParseRedditVideoNetworkResponseFingerprint : MethodFingerprint(
opcodes = listOf(
Opcode.NEW_INSTANCE,
Opcode.IGET_OBJECT,
Opcode.INVOKE_DIRECT,
Opcode.CONST_WIDE_32
),
customFingerprint = { methodDef, classDef ->
classDef.sourceFile == "RedditVideoRequest.java" && methodDef.name == "parseNetworkResponse"
}
)

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