迁移到gradle

.gitignore

@@ -0,0 +1,42 @@
+.gradle
+build/
+!gradle/wrapper/gradle-wrapper.jar
+!**/src/main/**/build/
+!**/src/test/**/build/
+
+### IntelliJ IDEA ###
+.idea/modules.xml
+.idea/jarRepositories.xml
+.idea/compiler.xml
+.idea/libraries/
+*.iws
+*.iml
+*.ipr
+out/
+!**/src/main/**/out/
+!**/src/test/**/out/
+
+### Eclipse ###
+.apt_generated
+.classpath
+.factorypath
+.project
+.settings
+.springBeans
+.sts4-cache
+bin/
+!**/src/main/**/bin/
+!**/src/test/**/bin/
+
+### NetBeans ###
+/nbproject/private/
+/nbbuild/
+/dist/
+/nbdist/
+/.nb-gradle/
+
+### VS Code ###
+.vscode/
+
+### Mac OS ###
+.DS_Store

.idea/.gitignore

@@ -0,0 +1,8 @@
+# Default ignored files
+/shelf/
+/workspace.xml
+# Editor-based HTTP Client requests
+/httpRequests/
+# Datasource local storage ignored files
+/dataSources/
+/dataSources.local.xml

.idea/gradle.xml

@@ -0,0 +1,16 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="GradleSettings">
+    <option name="linkedExternalProjectsSettings">
+      <GradleProjectSettings>
+        <option name="externalProjectPath" value="$PROJECT_DIR$" />
+        <option name="gradleHome" value="" />
+        <option name="modules">
+          <set>
+            <option value="$PROJECT_DIR$" />
+          </set>
+        </option>
+      </GradleProjectSettings>
+    </option>
+  </component>
+</project>

.idea/kotlinc.xml

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="KotlinJpsPluginSettings">
+    <option name="version" value="1.9.23" />
+  </component>
+</project>

.idea/misc.xml

@@ -0,0 +1,10 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ExternalStorageConfigurationManager" enabled="true" />
+  <component name="FrameworkDetectionExcludesConfiguration">
+    <file type="web" url="file://$PROJECT_DIR$" />
+  </component>
+  <component name="ProjectRootManager" version="2" languageLevel="JDK_17" default="true" project-jdk-name="corretto-17" project-jdk-type="JavaSDK">
+    <output url="file://$PROJECT_DIR$/out" />
+  </component>
+</project>

.idea/vcs.xml

@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="VcsDirectoryMappings">
+    <mapping directory="$PROJECT_DIR$" vcs="Git" />
+  </component>
+</project>

build.gradle.kts

@@ -0,0 +1,23 @@
+plugins {
+    kotlin("jvm") version "1.9.23"
+}
+
+group = "loli.ball"
+version = "1.0-SNAPSHOT"
+
+repositories {
+    mavenCentral()
+}
+
+dependencies {
+    implementation("org.jetbrains.kotlinx:kotlinx-coroutines-core:1.9.0-RC.2")
+    implementation("io.github.jaredmdobson:concentus:1.0.2")
+    testImplementation(kotlin("test"))
+}
+
+tasks.test {
+    useJUnitPlatform()
+}
+kotlin {
+    jvmToolchain(17)
+}

gradle.properties

@@ -0,0 +1 @@
+kotlin.code.style=official

gradle/wrapper/gradle-wrapper.properties

@@ -0,0 +1,6 @@
+#Sat Sep 07 20:30:58 CST 2024
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.5-bin.zip
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists

gradlew

@@ -0,0 +1,234 @@
+#!/bin/sh
+
+#
+# Copyright © 2015-2021 the original authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+##############################################################################
+#
+#   Gradle start up script for POSIX generated by Gradle.
+#
+#   Important for running:
+#
+#   (1) You need a POSIX-compliant shell to run this script. If your /bin/sh is
+#       noncompliant, but you have some other compliant shell such as ksh or
+#       bash, then to run this script, type that shell name before the whole
+#       command line, like:
+#
+#           ksh Gradle
+#
+#       Busybox and similar reduced shells will NOT work, because this script
+#       requires all of these POSIX shell features:
+#         * functions;
+#         * expansions «$var», «${var}», «${var:-default}», «${var+SET}»,
+#           «${var#prefix}», «${var%suffix}», and «$( cmd )»;
+#         * compound commands having a testable exit status, especially «case»;
+#         * various built-in commands including «command», «set», and «ulimit».
+#
+#   Important for patching:
+#
+#   (2) This script targets any POSIX shell, so it avoids extensions provided
+#       by Bash, Ksh, etc; in particular arrays are avoided.
+#
+#       The "traditional" practice of packing multiple parameters into a
+#       space-separated string is a well documented source of bugs and security
+#       problems, so this is (mostly) avoided, by progressively accumulating
+#       options in "$@", and eventually passing that to Java.
+#
+#       Where the inherited environment variables (DEFAULT_JVM_OPTS, JAVA_OPTS,
+#       and GRADLE_OPTS) rely on word-splitting, this is performed explicitly;
+#       see the in-line comments for details.
+#
+#       There are tweaks for specific operating systems such as AIX, CygWin,
+#       Darwin, MinGW, and NonStop.
+#
+#   (3) This script is generated from the Groovy template
+#       https://github.com/gradle/gradle/blob/master/subprojects/plugins/src/main/resources/org/gradle/api/internal/plugins/unixStartScript.txt
+#       within the Gradle project.
+#
+#       You can find Gradle at https://github.com/gradle/gradle/.
+#
+##############################################################################
+
+# Attempt to set APP_HOME
+
+# Resolve links: $0 may be a link
+app_path=$0
+
+# Need this for daisy-chained symlinks.
+while
+    APP_HOME=${app_path%"${app_path##*/}"}  # leaves a trailing /; empty if no leading path
+    [ -h "$app_path" ]
+do
+    ls=$( ls -ld "$app_path" )
+    link=${ls#*' -> '}
+    case $link in             #(
+      /*)   app_path=$link ;; #(
+      *)    app_path=$APP_HOME$link ;;
+    esac
+done
+
+APP_HOME=$( cd "${APP_HOME:-./}" && pwd -P ) || exit
+
+APP_NAME="Gradle"
+APP_BASE_NAME=${0##*/}
+
+# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
+
+# Use the maximum available, or set MAX_FD != -1 to use that value.
+MAX_FD=maximum
+
+warn () {
+    echo "$*"
+} >&2
+
+die () {
+    echo
+    echo "$*"
+    echo
+    exit 1
+} >&2
+
+# OS specific support (must be 'true' or 'false').
+cygwin=false
+msys=false
+darwin=false
+nonstop=false
+case "$( uname )" in                #(
+  CYGWIN* )         cygwin=true  ;; #(
+  Darwin* )         darwin=true  ;; #(
+  MSYS* | MINGW* )  msys=true    ;; #(
+  NONSTOP* )        nonstop=true ;;
+esac
+
+CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
+
+
+# Determine the Java command to use to start the JVM.
+if [ -n "$JAVA_HOME" ] ; then
+    if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
+        # IBM's JDK on AIX uses strange locations for the executables
+        JAVACMD=$JAVA_HOME/jre/sh/java
+    else
+        JAVACMD=$JAVA_HOME/bin/java
+    fi
+    if [ ! -x "$JAVACMD" ] ; then
+        die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+    fi
+else
+    JAVACMD=java
+    which java >/dev/null 2>&1 || die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+fi
+
+# Increase the maximum file descriptors if we can.
+if ! "$cygwin" && ! "$darwin" && ! "$nonstop" ; then
+    case $MAX_FD in #(
+      max*)
+        MAX_FD=$( ulimit -H -n ) ||
+            warn "Could not query maximum file descriptor limit"
+    esac
+    case $MAX_FD in  #(
+      '' | soft) :;; #(
+      *)
+        ulimit -n "$MAX_FD" ||
+            warn "Could not set maximum file descriptor limit to $MAX_FD"
+    esac
+fi
+
+# Collect all arguments for the java command, stacking in reverse order:
+#   * args from the command line
+#   * the main class name
+#   * -classpath
+#   * -D...appname settings
+#   * --module-path (only if needed)
+#   * DEFAULT_JVM_OPTS, JAVA_OPTS, and GRADLE_OPTS environment variables.
+
+# For Cygwin or MSYS, switch paths to Windows format before running java
+if "$cygwin" || "$msys" ; then
+    APP_HOME=$( cygpath --path --mixed "$APP_HOME" )
+    CLASSPATH=$( cygpath --path --mixed "$CLASSPATH" )
+
+    JAVACMD=$( cygpath --unix "$JAVACMD" )
+
+    # Now convert the arguments - kludge to limit ourselves to /bin/sh
+    for arg do
+        if
+            case $arg in                                #(
+              -*)   false ;;                            # don't mess with options #(
+              /?*)  t=${arg#/} t=/${t%%/*}              # looks like a POSIX filepath
+                    [ -e "$t" ] ;;                      #(
+              *)    false ;;
+            esac
+        then
+            arg=$( cygpath --path --ignore --mixed "$arg" )
+        fi
+        # Roll the args list around exactly as many times as the number of
+        # args, so each arg winds up back in the position where it started, but
+        # possibly modified.
+        #
+        # NB: a `for` loop captures its iteration list before it begins, so
+        # changing the positional parameters here affects neither the number of
+        # iterations, nor the values presented in `arg`.
+        shift                   # remove old arg
+        set -- "$@" "$arg"      # push replacement arg
+    done
+fi
+
+# Collect all arguments for the java command;
+#   * $DEFAULT_JVM_OPTS, $JAVA_OPTS, and $GRADLE_OPTS can contain fragments of
+#     shell script including quotes and variable substitutions, so put them in
+#     double quotes to make sure that they get re-expanded; and
+#   * put everything else in single quotes, so that it's not re-expanded.
+
+set -- \
+        "-Dorg.gradle.appname=$APP_BASE_NAME" \
+        -classpath "$CLASSPATH" \
+        org.gradle.wrapper.GradleWrapperMain \
+        "$@"
+
+# Use "xargs" to parse quoted args.
+#
+# With -n1 it outputs one arg per line, with the quotes and backslashes removed.
+#
+# In Bash we could simply go:
+#
+#   readarray ARGS < <( xargs -n1 <<<"$var" ) &&
+#   set -- "${ARGS[@]}" "$@"
+#
+# but POSIX shell has neither arrays nor command substitution, so instead we
+# post-process each arg (as a line of input to sed) to backslash-escape any
+# character that might be a shell metacharacter, then use eval to reverse
+# that process (while maintaining the separation between arguments), and wrap
+# the whole thing up as a single "set" statement.
+#
+# This will of course break if any of these variables contains a newline or
+# an unmatched quote.
+#
+
+eval "set -- $(
+        printf '%s\n' "$DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS" |
+        xargs -n1 |
+        sed ' s~[^-[:alnum:]+,./:=@_]~\\&~g; ' |
+        tr '\n' ' '
+    )" '"$@"'
+
+exec "$JAVACMD" "$@"

gradlew.bat

@@ -0,0 +1,89 @@
+@rem
+@rem Copyright 2015 the original author or authors.
+@rem
+@rem Licensed under the Apache License, Version 2.0 (the "License");
+@rem you may not use this file except in compliance with the License.
+@rem You may obtain a copy of the License at
+@rem
+@rem      https://www.apache.org/licenses/LICENSE-2.0
+@rem
+@rem Unless required by applicable law or agreed to in writing, software
+@rem distributed under the License is distributed on an "AS IS" BASIS,
+@rem WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+@rem See the License for the specific language governing permissions and
+@rem limitations under the License.
+@rem
+
+@if "%DEBUG%" == "" @echo off
+@rem ##########################################################################
+@rem
+@rem  Gradle startup script for Windows
+@rem
+@rem ##########################################################################
+
+@rem Set local scope for the variables with windows NT shell
+if "%OS%"=="Windows_NT" setlocal
+
+set DIRNAME=%~dp0
+if "%DIRNAME%" == "" set DIRNAME=.
+set APP_BASE_NAME=%~n0
+set APP_HOME=%DIRNAME%
+
+@rem Resolve any "." and ".." in APP_HOME to make it shorter.
+for %%i in ("%APP_HOME%") do set APP_HOME=%%~fi
+
+@rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+set DEFAULT_JVM_OPTS="-Xmx64m" "-Xms64m"
+
+@rem Find java.exe
+if defined JAVA_HOME goto findJavaFromJavaHome
+
+set JAVA_EXE=java.exe
+%JAVA_EXE% -version >NUL 2>&1
+if "%ERRORLEVEL%" == "0" goto execute
+
+echo.
+echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:findJavaFromJavaHome
+set JAVA_HOME=%JAVA_HOME:"=%
+set JAVA_EXE=%JAVA_HOME%/bin/java.exe
+
+if exist "%JAVA_EXE%" goto execute
+
+echo.
+echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME%
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:execute
+@rem Setup the command line
+
+set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar
+
+
+@rem Execute Gradle
+"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %*
+
+:end
+@rem End local scope for the variables with windows NT shell
+if "%ERRORLEVEL%"=="0" goto mainEnd
+
+:fail
+rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of
+rem the _cmd.exe /c_ return code!
+if  not "" == "%GRADLE_EXIT_CONSOLE%" exit 1
+exit /b 1
+
+:mainEnd
+if "%OS%"=="Windows_NT" endlocal
+
+:omega

settings.gradle.kts

@@ -0,0 +1,5 @@
+plugins {
+    id("org.gradle.toolchains.foojay-resolver-convention") version "0.5.0"
+}
+rootProject.name = "VoiceChat2"
+

src/main/kotlin/AudioConvert.kt

@@ -0,0 +1,75 @@
+import javax.sound.sampled.AudioFormat
+import kotlin.math.max
+import kotlin.math.min
+
+object AudioConvert {
+    fun getAudioFormat(sampleRate: Int, channels: Int): AudioFormat {
+        return AudioFormat(
+            AudioFormat.Encoding.PCM_SIGNED,
+            sampleRate.toFloat(),
+            16,
+            channels,
+            channels * 2,
+            sampleRate.toFloat(),
+            false
+        )
+    }
+
+    /**
+     * 将 float[] 转换为 short 的 byte[]。
+     *
+     * @param input  输入的 float[] 数据
+     * @param output 转换后的 byte[] 数据
+     */
+    fun convertFloatToShortByte(input: FloatArray, output: ByteArray) {
+        require(input.size * 2 == output.size) { "output byte array length must be twice the length of the input float array." }
+
+        for (i in input.indices) {
+            // 将 float 值限制在 -1.0 到 1.0 之间
+            val sample = min(max(input[i].toDouble(), -1.0), 1.0).toFloat()
+
+            // 将 float 值转换为 short
+            val shortSample = (sample * 32767).toInt().toShort()
+
+            // 将 short 值转换为两个字节，并存储在 lineBuffer 中
+            output[i * 2] = (shortSample.toInt() and 0xFF).toByte() // 低位字节
+            output[i * 2 + 1] = ((shortSample.toInt() shr 8) and 0xFF).toByte() // 高位字节
+        }
+    }
+
+    /**
+     * 将 short 的 byte[] 转换为 float[]。
+     *
+     * @param input  输入的 byte[] 数据（每两个字节表示一个 short）
+     * @param output 转换后的 float[] 数据
+     */
+    fun convertShortByteToFloat(input: ByteArray, output: FloatArray) {
+        require(input.size == output.size * 2) { "Input byte array length must be twice the length of the output float array." }
+
+        for (i in output.indices) {
+            // 将两个字节转换为 short
+            val low = input[i * 2].toInt() and 0xFF
+            val high = input[i * 2 + 1].toInt() and 0xFF
+            val shortSample = ((high shl 8) or low).toShort()
+
+            // 将 short 值转换为 float
+            output[i] = shortSample / 32768.0f
+        }
+    }
+
+    fun bytes2shorts(input: ByteArray, output: ShortArray) {
+        for (c in output.indices) {
+            val low = input[(c * 2)].toInt() and 0xFF
+            val high = input[(c * 2) + 1].toInt() shl 8
+            output[c] = (low or high).toShort()
+        }
+    }
+
+    fun shorts2bytes(input: ShortArray, output: ByteArray) {
+        for (c in input.indices) {
+            output[c * 2] = (input[c].toInt() and 0xFF).toByte()
+            output[c * 2 + 1] = ((input[c].toInt() shr 8) and 0xFF).toByte()
+        }
+    }
+
+}

src/main/kotlin/Client.kt

@@ -0,0 +1,93 @@
+import io.github.jaredmdobson.concentus.OpusApplication
+import io.github.jaredmdobson.concentus.OpusDecoder
+import io.github.jaredmdobson.concentus.OpusEncoder
+import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.launch
+import kotlinx.coroutines.runBlocking
+import java.io.IOException
+import java.io.ObjectInputStream
+import java.io.ObjectOutputStream
+import java.io.Serializable
+import java.net.InetSocketAddress
+import java.net.Socket
+import javax.sound.sampled.AudioSystem
+import kotlin.system.measureTimeMillis
+
+class Client {
+    companion object {
+        @JvmStatic
+        fun main(args: Array<String>) {
+            Client().mainClient()
+        }
+    }
+
+    val bufferOut = ByteArray(BUFFER_SIZE)
+    val targetDataLine = AudioSystem.getTargetDataLine(AUDIO_FORMAT).also {
+        it.open(AUDIO_FORMAT, bufferOut.size)
+        it.start()
+    }
+
+    val bufferIn = ByteArray(BUFFER_SIZE)
+    val sourceDataLine = AudioSystem.getSourceDataLine(AUDIO_FORMAT).also {
+        it.open(AUDIO_FORMAT, bufferIn.size)
+        it.start()
+    }
+
+    val decoder = OpusDecoder(SAMPLE_RATE, CHANNELS)
+    val encoder = OpusEncoder(SAMPLE_RATE, CHANNELS, OpusApplication.OPUS_APPLICATION_AUDIO).also {
+        it.bitrate = OPUS_BITRATE
+        it.forceMode = OPUS_MODE
+        it.signalType = OPUS_SIGNAL_TYPE
+        it.complexity = OPUS_COMPLEXITY
+    }
+
+    fun mainClient() {
+        val socket = Socket()
+        val scope = CoroutineScope(Dispatchers.IO)
+
+        val t = measureTimeMillis {
+            socket.connect(InetSocketAddress(SERVER_HOST, SERVER_PORT))
+        }
+        "connect time $t".loge()
+
+        val out = ObjectOutputStream(socket.getOutputStream())
+        val inp = ObjectInputStream(socket.getInputStream())
+
+        val recordJob = scope.launch {
+            while (true) {
+                targetDataLine.read(bufferOut, 0, bufferOut.size)
+                try {
+                    out.writeObject(encoder.encode(bufferOut))
+                    out.flush()
+                } catch (e: Exception) {
+                    e.printStackTrace()
+                    System.exit(0)
+                }
+            }
+        }
+
+        val playJob = scope.launch {
+            while (true) {
+                try {
+//                if (`in`!!.available() > bufferIn.size * 2) {
+//                    `in`!!.skip(`in`!!.available().toLong() - bufferIn.size)
+//                    println("丢弃")
+//                }
+//                `in`!!.read(bufferIn, 0, bufferIn.size)
+                    val dataPack = inp.readObject() as DataPack
+                    decoder.decode(dataPack, bufferIn)
+                    sourceDataLine.write(bufferIn, 0, bufferIn.size)
+                } catch (e: IOException) {
+                    e.printStackTrace()
+                    System.exit(0)
+                }
+            }
+        }
+
+        runBlocking {
+            recordJob.join()
+            playJob.join()
+        }
+    }
+}

src/main/kotlin/DataPack.kt

@@ -0,0 +1,10 @@
+import java.io.Serializable
+
+/**
+ * Created by LoliBall on 2024/8/31 23:02.
+ * https://github.com/WhichWho
+ */
+data class DataPack(
+    val timestamp: Long,
+    val opus: ByteArray,
+) : Serializable

src/main/kotlin/Main.kt

@@ -0,0 +1,80 @@
+import io.github.jaredmdobson.concentus.*
+import kotlinx.coroutines.*
+import java.util.concurrent.atomic.AtomicInteger
+import javax.print.Doc
+import kotlin.concurrent.fixedRateTimer
+
+/**
+ * Created by LoliBall on 2024/8/31 5:26.
+ * https://github.com/WhichWho
+ */
+
+//val SERVER_HOST = "zedo.top"
+val SERVER_HOST = "127.0.0.1"
+val SERVER_PORT = 7860
+val ECHO_CANCELLATION = false // 回声消除
+val RAW_PCM_PASS = false // 不进行opus压缩pcm直传
+
+// 2.5, 5,   10,  20,  40,   60 ms
+// 120, 240, 480, 960, 1920, 2880
+val PACKET_SAMPLES = 2880 // 48000Hz * 60ms = 2880
+val SAMPLE_RATE = 48000 // 8000、12000、16000、24000、48000
+val CHANNELS = 1
+val BUFFER_SIZE = PACKET_SAMPLES * CHANNELS * 2 // * 2是short | 48000Hz * 2(short) * 60ms = 5760B
+val AUDIO_FORMAT = AudioConvert.getAudioFormat(SAMPLE_RATE, CHANNELS)
+
+val OPUS_BITRATE = OpusConstants.OPUS_AUTO // 500 - 300000
+val OPUS_COMPLEXITY = 10 // 0: 快,质量差 10: 慢,质量好
+val OPUS_SIGNAL_TYPE = OpusSignal.OPUS_SIGNAL_VOICE
+val OPUS_MODE = OpusMode.MODE_HYBRID
+
+
+// 下面是统计用的
+val compressRateOpus = AtomicInteger()
+val compressRatePcm = AtomicInteger()
+
+fun main(args: Array<String>) {
+    val scope = CoroutineScope(Dispatchers.IO)
+    scope.launch {
+        Server.main(emptyArray())
+    }
+    scope.launch {
+        delay(1000) // 等服务器起来
+        Client.main(emptyArray())
+    }
+    fixedRateTimer(period = 1000) {
+        "compress rate: %.2f%%".format(compressRateOpus.get() * 100f / compressRatePcm.get()).loge()
+        compressRateOpus.set(0)
+        compressRatePcm.set(0)
+    }
+}
+
+val encodeOpusBuffer = mutableMapOf<OpusEncoder, ByteArray>()
+val encodePcmShortBuffer = mutableMapOf<OpusEncoder, ShortArray>()
+
+// 1275是opus单帧包最大值
+fun OpusEncoder.encode(pcm: ByteArray): DataPack {
+    if (RAW_PCM_PASS) {
+        return DataPack(System.currentTimeMillis(), pcm.copyOf())
+    }
+    val opusBuffer = encodeOpusBuffer[this] ?: ByteArray(1275).also { encodeOpusBuffer[this] = it }
+    val shortBuffer = encodePcmShortBuffer[this] ?: ShortArray(pcm.size / 2).also { encodePcmShortBuffer[this] = it }
+    AudioConvert.bytes2shorts(pcm, shortBuffer)
+    val bytesEncoded = encode(shortBuffer, 0, PACKET_SAMPLES, opusBuffer, 0, opusBuffer.size)
+    compressRatePcm.addAndGet(pcm.size)
+    compressRateOpus.addAndGet(bytesEncoded)
+    return DataPack(System.currentTimeMillis(), opusBuffer.sliceArray(0..<bytesEncoded))
+}
+
+val decodePcmShortBuffer = mutableMapOf<OpusDecoder, ShortArray>()
+fun OpusDecoder.decode(pack: DataPack, pcm: ByteArray) {
+    if (RAW_PCM_PASS) {
+        pack.opus.copyInto(pcm)
+        return
+    }
+    val shortBuffer = decodePcmShortBuffer[this] ?: ShortArray(pcm.size / 2).also { decodePcmShortBuffer[this] = it }
+    decode(pack.opus, 0, pack.opus.size, shortBuffer, 0, PACKET_SAMPLES, false)
+    AudioConvert.shorts2bytes(shortBuffer, pcm)
+}
+
+fun <T> T.loge() = also { println(this) }

src/main/kotlin/Server.kt

@@ -0,0 +1,111 @@
+import io.github.jaredmdobson.concentus.OpusApplication
+import io.github.jaredmdobson.concentus.OpusDecoder
+import io.github.jaredmdobson.concentus.OpusEncoder
+import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.launch
+import java.io.IOException
+import java.io.ObjectInputStream
+import java.io.ObjectOutputStream
+import java.net.ServerSocket
+import java.net.Socket
+import java.util.*
+import java.util.concurrent.CopyOnWriteArrayList
+
+val clientAudios = CopyOnWriteArrayList<ClientAudio>()
+
+object Server {
+
+    @JvmStatic
+    fun main(args: Array<String>) {
+        mainServer()
+    }
+
+    fun mainServer() {
+
+        val scope = CoroutineScope(Dispatchers.IO)
+        scope.launch {
+            while (true) {
+                for (client in clientAudios) {
+                    if (!client.isConnected) {
+                        clientAudios -= client
+                        continue
+                    }
+                    client.read()
+                }
+
+                for (client in clientAudios) {
+                    launch {
+                        for (audio in clientAudios) {
+                            if (audio != client || !ECHO_CANCELLATION) {
+                                client.mix(audio.sample)
+                            }
+                        }
+                        client.send()
+                    }
+                }
+            }
+        }
+
+        val sever = ServerSocket(SERVER_PORT)
+        while (true) {
+            val socket = sever.accept()
+            println("Accepted connection from " + socket.remoteSocketAddress)
+            clientAudios += ClientAudio(socket)
+        }
+    }
+
+}
+
+class ClientAudio(val socket: Socket) {
+
+    val inp = ObjectInputStream(socket.getInputStream())
+    val out = ObjectOutputStream(socket.getOutputStream())
+    val buffer = ByteArray(BUFFER_SIZE)
+    val sample = FloatArray(PACKET_SAMPLES)
+    val mixSample = FloatArray(PACKET_SAMPLES)
+    val mixBuffer = ByteArray(BUFFER_SIZE)
+
+    val decoder = OpusDecoder(SAMPLE_RATE, CHANNELS)
+    val encoder = OpusEncoder(SAMPLE_RATE, CHANNELS, OpusApplication.OPUS_APPLICATION_AUDIO).also {
+        it.bitrate = OPUS_BITRATE
+        it.forceMode = OPUS_MODE
+        it.signalType = OPUS_SIGNAL_TYPE
+        it.complexity = OPUS_COMPLEXITY
+    }
+
+    var isConnected = true
+
+    fun send() {
+        try {
+            AudioConvert.convertFloatToShortByte(mixSample, mixBuffer)
+            out.writeObject(encoder.encode(mixBuffer))
+            out.flush()
+        } catch (e: IOException) {
+            isConnected = false
+        }
+    }
+
+    fun read() {
+        try {
+//            if (`in`!!.available() > bufferIn.size * 2) {
+//                `in`!!.skip(`in`!!.available().toLong() - bufferIn.size)
+//                println("丢弃")
+//            }
+//            `in`.read(buffer)
+            val pack = inp.readObject() as DataPack
+//            println("延迟： ${System.currentTimeMillis() - timestamp}ms")
+            decoder.decode(pack, buffer)
+            AudioConvert.convertShortByteToFloat(buffer, sample)
+            Arrays.fill(mixSample, 0f)
+        } catch (e: IOException) {
+            isConnected = false
+        }
+    }
+
+    fun mix(sample: FloatArray) {
+        for (i in sample.indices) {
+            mixSample[i] += sample[i]
+        }
+    }
+}