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perf(resource-mapping): map resources with multiple threads
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40 changes: 0 additions & 40 deletions
40
...app/revanced/patches/youtube/misc/mapping/patch/ResourceIdMappingProviderResourcePatch.kt
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73 changes: 73 additions & 0 deletions
73
...in/kotlin/app/revanced/patches/youtube/misc/mapping/patch/ResourceMappingResourcePatch.kt
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,73 @@ | ||
| package app.revanced.patches.youtube.misc.mapping.patch | ||
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| import app.revanced.patcher.annotation.Description | ||
| import app.revanced.patcher.annotation.Name | ||
| import app.revanced.patcher.annotation.Version | ||
| import app.revanced.patcher.data.impl.ResourceData | ||
| import app.revanced.patcher.patch.PatchResult | ||
| import app.revanced.patcher.patch.PatchResultSuccess | ||
| import app.revanced.patcher.patch.impl.ResourcePatch | ||
| import org.w3c.dom.Element | ||
| import java.util.* | ||
| import java.util.concurrent.Executors | ||
| import java.util.concurrent.TimeUnit | ||
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| @Name("resource-mapping") | ||
| @Description("Creates a map of public resources.") | ||
| @Version("0.0.1") | ||
| class ResourceMappingResourcePatch : ResourcePatch() { | ||
| companion object { | ||
| internal lateinit var resourceMappings: List<ResourceElement> | ||
| private set | ||
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| private val THREAD_COUNT = Runtime.getRuntime().availableProcessors() | ||
| private val threadPoolExecutor = Executors.newFixedThreadPool(THREAD_COUNT) | ||
| } | ||
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| override fun execute(data: ResourceData): PatchResult { | ||
| // save the file in memory to concurrently read from | ||
| val resourceXmlFile = data["res/values/public.xml"].readBytes() | ||
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| // create a synchronized list to store the resource mappings | ||
| val mappings = Collections.synchronizedList(mutableListOf<ResourceElement>()) | ||
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| for (threadIndex in 0 until THREAD_COUNT) { | ||
| threadPoolExecutor.execute thread@{ | ||
| data.xmlEditor[resourceXmlFile.inputStream()].use { editor -> | ||
| val resources = editor.file.documentElement.childNodes | ||
| val resourcesLength = resources.length | ||
| val jobSize = resourcesLength / THREAD_COUNT | ||
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| val batchStart = jobSize * threadIndex | ||
| val batchEnd = jobSize * (threadIndex + 1) | ||
| element@ for (i in batchStart until batchEnd) { | ||
| // make sure to not to go out of bounds when rounding errors occur at calculating the jobSize | ||
| if (i >= resourcesLength) return@thread | ||
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| val node = resources.item(i) | ||
| if (node !is Element) continue | ||
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| val nameAttribute = node.getAttribute("name") | ||
| val typeAttribute = node.getAttribute("type") | ||
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| if (node.nodeName != "public" || nameAttribute.startsWith("APKTOOL")) continue | ||
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| val id = node.getAttribute("id").substring(2).toLong(16) | ||
| mappings.add(ResourceElement(typeAttribute, nameAttribute, id)) | ||
| } | ||
| } | ||
| } | ||
| } | ||
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| threadPoolExecutor | ||
| .also { it.shutdown() } | ||
| .awaitTermination(Long.MAX_VALUE, TimeUnit.SECONDS) | ||
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| resourceMappings = mappings | ||
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| return PatchResultSuccess() | ||
| } | ||
| } | ||
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| data class ResourceElement(val type: String, val name: String, val id: Long) |
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