feat: add gif speed up and speed down command

src/main/kotlin/cn/rtast/fancybot/FancyBot.kt

@@ -13,6 +13,7 @@ import cn.rtast.fancybot.commands.misc.ScanQRCodeCommand
 import cn.rtast.fancybot.commands.misc.ShortLinkCommand.Companion.makeShortLink
 import cn.rtast.fancybot.commands.parse.*
 import cn.rtast.fancybot.commands.reply.ImageBedCommand
+import cn.rtast.fancybot.commands.reply.SpeedUpGIFCommand
 import cn.rtast.fancybot.entity.nailong.NaiLongDetectPayload
 import cn.rtast.fancybot.entity.nailong.NaiLongDetectResponse
 import cn.rtast.fancybot.enums.WSType
@@ -61,17 +62,6 @@ class FancyBot : OneBotListener {
         logger.info("$sender($senderId: $groupId >>> $messageId): $msg")
         logger.trace("$sender($senderId: $groupId >>> $messageId: $json")
 
-        if (message.images.isNotEmpty()) {
-            message.images.forEach {
-                val payload = NaiLongDetectPayload(it.file).toJson()
-                val result = Http.post<NaiLongDetectResponse>(configManager.naiLongApiUrl, payload)
-                logger.info("奶龙识别结果: ${result.result}")
-                if (result.result) {
-                    message.reply("本群禁止发奶龙!")
-                }
-            }
-        }
-
         if (message.message.any { it.type == ArrayMessageType.face && it.data.id.toString() == "419" }) {
             message.reply("你发牛魔的火车呢, 我直接就是打断")
         }
@@ -104,6 +94,10 @@ class FancyBot : OneBotListener {
             val plainTextContent = getMsg.message
                 .filter { it.type == ArrayMessageType.text }
                 .joinToString { it.data.text!! }
+            if (command.contains("加速")) {
+                val multiply = command.split("加速").last().toFloat()
+                SpeedUpGIFCommand.speedUp(message, getMsg, multiply)
+            }
             if (command.contains("倒放") || command.contains("/df")) {
                 // 使用回复消息的方式对一个gif倒放
                 ReverseGIFCommand.reverse(message, getMsg)
@@ -138,6 +132,16 @@ class FancyBot : OneBotListener {
         }
 
         coroutineScope.launch {
+            if (message.images.isNotEmpty()) {
+                message.images.forEach {
+                    val payload = NaiLongDetectPayload(it.file).toJson()
+                    val result = Http.post<NaiLongDetectResponse>(configManager.naiLongApiUrl, payload)
+                    logger.info("奶龙识别结果: ${result.result}")
+                    if (result.result) {
+                        message.reply("本群禁止发奶龙!")
+                    }
+                }
+            }
             message.message.forEach {
                 if (it.type == ArrayMessageType.image) {
                     val filename = it.data.file!!.split("=").last() + ".png"

src/main/kotlin/cn/rtast/fancybot/commands/reply/SpeedUpGIFCommand.kt

@@ -0,0 +1,33 @@
+/*
+ * Copyright © 2024 RTAkland
+ * Author: RTAkland
+ * Date: 2024/10/27
+ */
+
+
+package cn.rtast.fancybot.commands.reply
+
+import cn.rtast.fancybot.commands.misc.ShortLinkCommand.Companion.makeShortLink
+import cn.rtast.fancybot.commands.parse.AsciiArtCommand
+import cn.rtast.fancybot.util.misc.ImageBed
+import cn.rtast.fancybot.util.misc.makeGif
+import cn.rtast.fancybot.util.misc.toURL
+import cn.rtast.rob.entity.GetMessage
+import cn.rtast.rob.entity.GroupMessage
+import cn.rtast.rob.util.ob.MessageChain
+import com.madgag.gif.fmsware.GifDecoder
+
+object SpeedUpGIFCommand {
+    suspend fun speedUp(message: GroupMessage, getMsg: GetMessage.Message, multiply: Float) {
+        val gifUrl = AsciiArtCommand.getImageUrl(getMsg)
+        val gifStream = gifUrl.toURL().openStream()
+        val decoder = GifDecoder()
+        decoder.read(gifStream)
+        val frames = (0 until decoder.frameCount).map { decoder.getFrame(it) }.reversed()
+        val gifBase64 = decoder.makeGif(frames, multiply)
+        val imgBedUrl = ImageBed.upload(gifBase64)
+        val shortLink = imgBedUrl.makeShortLink()
+        val msg = MessageChain.Builder().addImage(imgBedUrl).addText(shortLink).build()
+        message.reply(msg)
+    }
+}

src/main/kotlin/cn/rtast/fancybot/util/misc/GIF.kt

@@ -12,7 +12,7 @@ import com.madgag.gif.fmsware.GifDecoder
 import java.awt.image.BufferedImage
 import java.io.ByteArrayOutputStream
 
-fun GifDecoder.makeGif(frames: List<BufferedImage>): ByteArray {
+fun GifDecoder.makeGif(frames: List<BufferedImage>, speed: Float? = null): ByteArray {
     val estimatedSize = frames.size * 50 * 1024
     val byteArrayOutputStream = ByteArrayOutputStream(estimatedSize)
     val encoder = AnimatedGifEncoder()
@@ -20,7 +20,13 @@ fun GifDecoder.makeGif(frames: List<BufferedImage>): ByteArray {
     encoder.setRepeat(0)
     val delays = frames.indices.map { this.getDelay(this.frameCount - it - 1) }
     frames.indices.forEach { i ->
+        if (speed == null) {
             encoder.setDelay(delays[i])
+        } else {
+            var delay = this.getDelay(i)
+            delay = (delay / speed).toInt()
+            encoder.setDelay(delay.coerceAtLeast(1))
+        }
         encoder.addFrame(frames[i])
     }
     encoder.finish()