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上传ble协议优化

newdev_chengguofeng
liwei1dao 3 months ago
parent
cb76b101e8
commit
d15b59a8d7
2 changed files with 257 additions and 298 deletions
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  1. 381
      local_plugins/ble_service/android/src/main/kotlin/com/yunqiinnovation/ble_service/BleService.kt
  2. 170
      local_plugins/ble_service/android/src/main/kotlin/com/yunqiinnovation/ble_service/OpusAudioManager.kt

381
local_plugins/ble_service/android/src/main/kotlin/com/yunqiinnovation/ble_service/BleService.kt
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@ -16,7 +16,7 @@ import java.io.File
import java.io.FileOutputStream import java.io.FileOutputStream
import java.text.SimpleDateFormat import java.text.SimpleDateFormat
import java.util.Date import java.util.Date
import java.util.concurrent.LinkedBlockingQueue import java.util.concurrent.LinkedBlockingDeque
import android.os.Handler import android.os.Handler
import java.util.concurrent.atomic.AtomicBoolean import java.util.concurrent.atomic.AtomicBoolean
import android.util.Log import android.util.Log
@ -133,9 +133,16 @@ object BleService {
// 音频数据缓存 // 音频数据缓存
//private val audioDataBuffer = mutableListOf<Byte>() //private val audioDataBuffer = mutableListOf<Byte>()
// 音频数据发送相关 // 音频数据发送相关：左右声道各一条独立缓存队列 + 独立发送线程，两线程错开 20ms 启动，各自按声道节拍下发。
private val audioSendQueue = LinkedBlockingQueue<ByteArray>() // 缓存兼作重连暂停期间的暂存与 F4/F5 降速积压；LinkedBlockingDeque 线程安全(生产者=编码回调线程，消费者=对应发送线程)。
private var audioSendThread: Thread? = null private val leftSendBuffer = LinkedBlockingDeque<ByteArray>()
private val rightSendBuffer = LinkedBlockingDeque<ByteArray>()
private var leftSendThread: Thread? = null
private var rightSendThread: Thread? = null
// 两线程写的是同一个 callWriteChar(共享可变 .value)+同一 gatt，真正的写必须串行化，否则并发写会互相覆盖发错数据。
private val bleWriteLock = Any()
// 右声道发送线程相对左声道错开启动的毫秒数，避免两路同一时刻抢 BLE 写、平摊链路占用。
private const val RIGHT_SEND_THREAD_STAGGER_MS = 40L
private val audioSendHandler = Handler(Looper.getMainLooper()) private val audioSendHandler = Handler(Looper.getMainLooper())
private val isAudioSending = AtomicBoolean(false) private val isAudioSending = AtomicBoolean(false)
// 上一包音频实际发送的时间戳(ms)，仅用于发送节拍日志统计间隔；-1 表示尚未发送过 // 上一包音频实际发送的时间戳(ms)，仅用于发送节拍日志统计间隔；-1 表示尚未发送过
@ -196,24 +203,28 @@ object BleService {
// 音频下行发送间隔(ms)，调试界面可在运行时调整；通过 setCallTranslationDebugParams() 修改 // 音频下行发送间隔(ms)，调试界面可在运行时调整；通过 setCallTranslationDebugParams() 修改
@Volatile @Volatile
private var audioSendIntervalNormal = DEFAULT_AUDIO_SEND_INTERVAL_NORMAL private var audioSendIntervalNormal = DEFAULT_AUDIO_SEND_INTERVAL_NORMAL
// 左/右声道下发节拍倍数(以一个 audioSendIntervalNormal=40ms 拍为单位)： // 左/右声道下发节拍倍数(以一个 audioSendIntervalNormal 拍为单位)：
// 1 拍=40ms/包(全速)、4 拍=160ms/包、8 拍=320ms/包(三档)。 // 1 拍=1×拍长/包(全速)、4 拍、8 拍(三档)。由设备 F4(左)/F5(右) 上报的解码空余动态切换：空余越少越降速。
// 由设备 F4(左)/F5(右) 上报的解码缓存空余字节数动态切换：空余越少越降速，缓解设备解码溢出丢包。 // 各声道发送线程按 tick - lastSendTick(线程内局部) >= paceTicks 控制该声道下发频率。
@Volatile @Volatile
private var leftPaceTicks: Int = 1 private var leftPaceTicks: Int = 1
@Volatile @Volatile
private var rightPaceTicks: Int = 1 private var rightPaceTicks: Int = 1
// 各声道上次成功发送所处的拍号；-1 表示尚未发送过(立即可发)。用于按 paceTicks 控制每声道下发频率。 // 声道缓存安全上限（纯防 OOM 兜底）：现在缓存元素是单帧 opus，超限丢最旧帧并告警。
private var lastLeftSendTick = -1L
private var lastRightSendTick = -1L
// 左右声道各自的下行缓存：主队列取出的合包先按声道分流到这里，再由发送线程按各自档位取出下发。
// 降速档位会在此积压；仅在音频发送线程内访问，无需额外加锁。
private val leftHoldBuffer = ArrayDeque<ByteArray>()
private val rightHoldBuffer = ArrayDeque<ByteArray>()
// 缓存安全上限（纯防 OOM 兜底）：超限时丢弃最旧包并告警；单包约 165B，10000 包≈1.6MB。
private const val CHANNEL_HOLD_BUFFER_MAX = 10000 private const val CHANNEL_HOLD_BUFFER_MAX = 10000
// 左右同一拍都满足发送条件时的轮转标记，保证两声道公平、避免一方饿死。 // ---- 下行合包(已从 OpusAudioManager 上移到 BleService) ----
private var holdDrainPreferLeft = true // 每包合并的 opus 帧数(默认5，调试界面可调 1..20)：发送线程每拍从声道队列取最多 bundleFrameCount 帧，
// 不足则用静音帧补齐、队列空则不发；组包布局 [4B 序号(小端)] + [1B 声道] + [N × opus 帧]。
@Volatile
private var bundleFrameCount = 5
// 合包头部字节数：bytes0-3 序号(小端 uint32) + byte4 声道
private const val BUNDLE_HEADER_SIZE = 5
// 左右声道各自的下行包序号(每成功发一包自增)，供设备侧核对连续性；仅各自声道线程访问
private var leftPacketSeq = 0
private var rightPacketSeq = 0
// 补齐用静音 opus 帧模板(OpusAudioManager 运行时编码零PCM生成，经 onSilenceFrameReady 送来)；未就绪时为 null
@Volatile
private var silenceFrame: ByteArray? = null
// ---- F4/F5 解码空余字节数 → 下发档位：简单三档(可在通话调试界面运行时调整) ---- // ---- F4/F5 解码空余字节数 → 下发档位：简单三档(可在通话调试界面运行时调整) ----
// 每档 = (剩余字节数下限 门限, 发送间隔 sendMs)。设备上报某声道解码空余 freeBytes 后， // 每档 = (剩余字节数下限 门限, 发送间隔 sendMs)。设备上报某声道解码空余 freeBytes 后，
// 从第一档往下取第一个满足 freeBytes>=门限 的档，用该档发送间隔下发(内部按 audioSendIntervalNormal 换算为拍数)。 // 从第一档往下取第一个满足 freeBytes>=门限 的档，用该档发送间隔下发(内部按 audioSendIntervalNormal 换算为拍数)。
@ -354,9 +365,14 @@ object BleService {
notifyAudioDataReceived(data, channel) notifyAudioDataReceived(data, channel)
} }
override fun onAudioDataEncoded(data: ByteArray) { override fun onAudioFrameEncoded(channelPrefix: Byte, frame: ByteArray) {
// 将编码后的音频数据加入发送队列 // 单帧入对应声道队列，由发送线程按拍取 bundleFrameCount 帧合包下发
addAudioDataToSendQueue(data) enqueueOpusFrame(channelPrefix, frame)
}
override fun onSilenceFrameReady(frame: ByteArray) {
// 缓存静音帧模板，用于合包时不足帧补齐
silenceFrame = frame
} }
override fun onDecodeStreamStateChanged(isStarted: Boolean) { override fun onDecodeStreamStateChanged(isStarted: Boolean) {
@ -1500,136 +1516,131 @@ object BleService {
} }
/** /**
* 将一包已成型的音频合帧加入下行发送队列 * 将一帧 opus 按声道加入对应下行队列。合包(取 N 帧/补静音/组头)在发送线程按拍完成。
* 包格式：[4B 序号(大端 uint32)] + [1B 声道(0=左/1=右)] + [5 × opus(40B)] * 重连窗口内不丢弃：继续入队暂存，回连成功后续发；仅超 OOM 兜底上限才丢最旧帧。
* 双声道独立编码模式下，每次回调送来的就是一整包，直接入队，不再二次切片 * @param channelPrefix 声道标识(CHANNEL_LEFT=0 / CHANNEL_RIGHT=1)
* @param data 待发送的合帧包 * @param frame 一帧 opus 编码数据
*/ */
private fun addAudioDataToSendQueue(data: ByteArray) { private fun enqueueOpusFrame(channelPrefix: Byte, frame: ByteArray) {
if (data.isEmpty()) return if (frame.isEmpty()) return
// 重连窗口内不丢弃：继续入队，由发送线程在暂停期间抽干到左右声道缓存暂存，回连成功后按节拍继续下发。 val buffer = when (channelPrefix) {
if (!audioSendQueue.offer(data)) { OpusAudioManager.CHANNEL_RIGHT -> rightSendBuffer
Log.w(TAG, "音频发送队列已满，丢弃当前包 size=${data.size}") // 左声道及未知声道统一归入左队列
else -> leftSendBuffer
} }
while (buffer.size >= CHANNEL_HOLD_BUFFER_MAX) {
buffer.pollFirst()
CallLog.w(TAG, "声道积压缓存超上限($CHANNEL_HOLD_BUFFER_MAX)，丢弃最旧帧 ch=$channelPrefix")
}
buffer.offerLast(frame)
} }
/** /**
* 启动音频数据发送线程（优化版本） * 启动左右两条独立发送线程（各发一路声道），右声道相对左声道错开 RIGHT_SEND_THREAD_STAGGER_MS 启动，
* 避免两路同一时刻抢 BLE 写。每条线程按自身声道的 paceTicks 控制下发频率，互不影响。
*/ */
private fun startAudioSendThread() { private fun startAudioSendThread() {
if (audioSendThread?.isAlive == true) { if (leftSendThread?.isAlive == true || rightSendThread?.isAlive == true) {
Log.d(TAG, "音频发送线程已在运行") Log.d(TAG, "音频发送线程已在运行")
return return
} }
isAudioSending.set(true) isAudioSending.set(true)
audioSendThread = Thread { leftSendThread = createChannelSendThread(isLeft = true, startOffsetMs = 0L).apply { start() }
CallLog.i(TAG, "音频发送线程已启动") rightSendThread = createChannelSendThread(isLeft = false, startOffsetMs = RIGHT_SEND_THREAD_STAGGER_MS).apply { start() }
CallLog.i(TAG, "音频发送线程已启动(左/右双线程，右错开 ${RIGHT_SEND_THREAD_STAGGER_MS}ms)")
}
// 固定 40ms 一拍的发送节拍。每一拍做一次"发不发/发哪路"的决策；左右各按自身档位(paceTicks) /**
// 控制频率(40/80/160ms)，定时器始终稳定在 audioSendIntervalNormal 一拍，下发间隔不随 poll/发送耗时抖动。 * 构建单声道发送线程：固定 audioSendIntervalNormal 一拍(睡到绝对时刻，不随耗时抖动)，
var nextTickAt = System.currentTimeMillis() * 每拍按该声道 paceTicks 判断是否到点，到点则从该声道缓存取队首一包下发。
* 重连暂停期间只跳过下发、不清缓存(译音继续积压待回连续发)。
* @param isLeft true=左声道 / false=右声道
* @param startOffsetMs 相对启动时刻的错开毫秒(右声道用来与左声道错峰)
*/
private fun createChannelSendThread(isLeft: Boolean, startOffsetMs: Long): Thread {
val chName = if (isLeft) "L" else "R"
return Thread {
CallLog.i(TAG, "音频发送线程[$chName]已启动 offset=${startOffsetMs}ms")
var nextTickAt = System.currentTimeMillis() + startOffsetMs
var tick = 0L var tick = 0L
var lastSendTick = -1L
// 首拍错开：右线程先睡 startOffsetMs 再进入循环，使两路发送时刻相互错峰
val initDelay = nextTickAt - System.currentTimeMillis()
if (initDelay > 0) {
try { Thread.sleep(initDelay) } catch (e: InterruptedException) { return@Thread }
}
while (isAudioSending.get() && !Thread.currentThread().isInterrupted) { while (isAudioSending.get() && !Thread.currentThread().isInterrupted) {
try { try {
// 0) 重连窗口：暂停下发但**不丢译音**——仍抽干主队列到左右声道缓存暂存 // 重连暂停期间只跳过下发，不动缓存(译音继续积压，回连后续发)
// (缓存超大兜底 CHANNEL_HOLD_BUFFER_MAX 才丢最旧防 OOM)，只是本拍不写 BLE； if (!isDownlinkPaused) {
// 待回连成功恢复后按节拍把暂存的译音继续发出。 val buffer = if (isLeft) leftSendBuffer else rightSendBuffer
if (isDownlinkPaused) { val paceTicks = if (isLeft) leftPaceTicks else rightPaceTicks
while (true) { if (buffer.isNotEmpty() && (lastSendTick < 0 || tick - lastSendTick >= paceTicks)) {
val more = audioSendQueue.poll() ?: break if (trySendChannelChunk(isLeft)) lastSendTick = tick
routeToHoldBuffer(more)
} }
nextTickAt += audioSendIntervalNormal
tick++
val sleepMs = nextTickAt - System.currentTimeMillis()
if (sleepMs > 0) Thread.sleep(sleepMs) else nextTickAt = System.currentTimeMillis()
continue
}
// 1) 非阻塞抽干主队列，按声道分流到左右缓存（不在热路径阻塞，保证节拍稳定）。
// 合包布局：[4B 序号(小端)] + [1B 声道(0=左/1=右)] + [N × opus]
while (true) {
val more = audioSendQueue.poll() ?: break
routeToHoldBuffer(more)
}
// 2) 本拍最多发一包：左右各按自身档位(paceTicks)判断是否到点；两路都到点时按 holdDrainPreferLeft
// 轮转二选一，另一路顺延到下一拍（即"一拍一包、左右交替"的下发方式）。
val leftDue = leftHoldBuffer.isNotEmpty() &&
(lastLeftSendTick < 0 || tick - lastLeftSendTick >= leftPaceTicks)
val rightDue = rightHoldBuffer.isNotEmpty() &&
(lastRightSendTick < 0 || tick - lastRightSendTick >= rightPaceTicks)
val pickLeft: Boolean? = when {
leftDue && rightDue -> { holdDrainPreferLeft = !holdDrainPreferLeft; holdDrainPreferLeft }
leftDue -> true
rightDue -> false
else -> null
} }
when (pickLeft) { // 固定一拍：睡到下一拍绝对时刻，节拍稳定不随发送耗时抖动
true -> if (trySendChannelChunk(true)) lastLeftSendTick = tick
false -> if (trySendChannelChunk(false)) lastRightSendTick = tick
null -> {}
}
// 3) 固定 40ms 节拍：无论本拍是否发送都睡到下一拍绝对时刻，保证下发节拍稳定、不随耗时抖动。
nextTickAt += audioSendIntervalNormal nextTickAt += audioSendIntervalNormal
tick++ tick++
val sleepMs = nextTickAt - System.currentTimeMillis() val sleepMs = nextTickAt - System.currentTimeMillis()
if (sleepMs > 0) { if (sleepMs > 0) {
Thread.sleep(sleepMs) Thread.sleep(sleepMs)
} else { } else {
// 落后于节拍（发送/分流超时），重新对齐，避免之后疯狂追发 // 落后于节拍(发送超时)，重新对齐，避免之后疯狂追发
nextTickAt = System.currentTimeMillis() nextTickAt = System.currentTimeMillis()
} }
} catch (e: InterruptedException) { } catch (e: InterruptedException) {
Log.d(TAG, "音频发送线程被中断") Log.d(TAG, "音频发送线程[$chName]被中断")
break break
} catch (e: Exception) { } catch (e: Exception) {
Log.e(TAG, "音频发送线程异常: ${e.message}", e) Log.e(TAG, "音频发送线程[$chName]异常: ${e.message}", e)
} }
} }
Log.i(TAG, "音频发送线程已停止") CallLog.i(TAG, "音频发送线程[$chName]已停止")
}.apply { }.apply { name = "AudioSendThread-$chName" }
name = "AudioSendThread"
start()
}
} }
/** /**
* 从指定声道缓存取队首一包下发，返回是否成功写入。仅在音频发送线程内调用。 * 从指定声道队列取最多 bundleFrameCount 帧，不足用静音帧补齐，组包后下发。仅在该声道发送线程内调用。
* - 成功：已塞入底层发送缓冲，写调试录音并打印发送日志(Δ/包序/档位)，返回 true； * - 队列空：不发，返回 false；
* - 失败(拥塞)：原包放回队头、记一次拥塞告警，返回 false，调用方据此不更新该声道发送拍号、下一拍重试，绝不丢包。 * - 成功：写调试录音、打印发送日志、推进该声道包序，返回 true；
* - 失败(拥塞)：取出的真实帧按原序放回队头(静音补齐帧丢弃、下拍重组)，返回 false，下一拍重试，绝不丢帧。
*/ */
private fun trySendChannelChunk(isLeft: Boolean): Boolean { private fun trySendChannelChunk(isLeft: Boolean): Boolean {
val buffer = if (isLeft) leftHoldBuffer else rightHoldBuffer val buffer = if (isLeft) leftSendBuffer else rightSendBuffer
if (buffer.isEmpty()) return false val n = bundleFrameCount.coerceIn(1, 20)
val audioChunk = buffer.removeFirst() // 取最多 n 帧真实数据
// 解析包头：声道(byte[4]) 与 序号(byte[0..3] 小端)，供日志与重试归位使用 val realFrames = ArrayList<ByteArray>(n)
val channelByte = if (audioChunk.size >= 5) audioChunk[4] else null while (realFrames.size < n) {
val seq = if (audioChunk.size >= 5) val f = buffer.pollFirst() ?: break
((audioChunk[3].toInt() and 0xFF) shl 24) or realFrames.add(f)
((audioChunk[2].toInt() and 0xFF) shl 16) or }
((audioChunk[1].toInt() and 0xFF) shl 8) or if (realFrames.isEmpty()) return false // 队列空则不发
(audioChunk[0].toInt() and 0xFF)
else -1 val channel = if (isLeft) OpusAudioManager.CHANNEL_LEFT else OpusAudioManager.CHANNEL_RIGHT
val chTag = when (channelByte) { val chTag = if (isLeft) "L" else "R"
OpusAudioManager.CHANNEL_LEFT -> "L" val seq = if (isLeft) leftPacketSeq else rightPacketSeq
OpusAudioManager.CHANNEL_RIGHT -> "R"
else -> "?($channelByte)" // 组包帧 = 真实帧 + 静音帧补齐到 n（静音帧未就绪时只发真实帧数，罕见的启动窗口）
} val frames = ArrayList<ByteArray>(n)
frames.addAll(realFrames)
val silence = silenceFrame
var padCount = 0
if (silence != null) {
while (frames.size < n) { frames.add(silence); padCount++ }
}
val packet = buildBundlePacket(seq, channel, frames)
// 同步写入，拿到真实的成功/失败：false=底层发送缓冲已满(拥塞)，作为背压信号 // 同步写入，拿到真实的成功/失败：false=底层发送缓冲已满(拥塞)，作为背压信号
val sent = sendAudioChunkBlocking(audioChunk) val sent = sendAudioChunkBlocking(packet)
if (!sent) { if (!sent) {
// 写失败：放回原声道队头，下一拍重试，绝不丢弃、声道内顺序不变 // 写失败：真实帧按原顺序放回队头(倒序 offerFirst)，下一拍重试；静音补齐帧丢弃，下次按新帧重组
buffer.addFirst(audioChunk) for (i in realFrames.indices.reversed()) buffer.offerFirst(realFrames[i])
writeFailRetryCount++ writeFailRetryCount++
if (writeFailRetryCount == 1 || writeFailRetryCount % 50 == 0) { if (writeFailRetryCount == 1 || writeFailRetryCount % 50 == 0) {
CallLog.w(TAG, "下行写入拥塞，重试中 ch=$chTag seq=$seq 连续失败=$writeFailRetryCount " + CallLog.w(TAG, "下行写入拥塞，重试中 ch=$chTag seq=$seq 连续失败=$writeFailRetryCount " +
"hold(L=${leftHoldBuffer.size},R=${rightHoldBuffer.size})") "buf(L=${leftSendBuffer.size},R=${rightSendBuffer.size})")
} }
return false return false
} }
@ -1637,80 +1648,77 @@ object BleService {
CallLog.i(TAG, "下行写入已恢复，之前连续失败=$writeFailRetryCount") CallLog.i(TAG, "下行写入已恢复，之前连续失败=$writeFailRetryCount")
writeFailRetryCount = 0 writeFailRetryCount = 0
} }
// 调试录音文件按声道分别保存（左右各自独立编码，混写无法解码听辨）： // 成功后推进该声道包序
// 剥离 5 字节包头后，按声道标记写入对应声道文件（仅成功时写，避免重试重复） if (isLeft) leftPacketSeq++ else rightPacketSeq++
if (audioChunk.size > 5) {
val opusPayload = audioChunk.copyOfRange(5, audioChunk.size) // 调试录音：剥离 5 字节包头后按声道写入（含静音补齐部分，听辨即静音）
when (channelByte) { if (packet.size > BUNDLE_HEADER_SIZE) {
val opusPayload = packet.copyOfRange(BUNDLE_HEADER_SIZE, packet.size)
when (channel) {
OpusAudioManager.CHANNEL_LEFT -> recordfile1Left?.saveAudioDataToWav(opusPayload) OpusAudioManager.CHANNEL_LEFT -> recordfile1Left?.saveAudioDataToWav(opusPayload)
OpusAudioManager.CHANNEL_RIGHT -> recordfile1Right?.saveAudioDataToWav(opusPayload) OpusAudioManager.CHANNEL_RIGHT -> recordfile1Right?.saveAudioDataToWav(opusPayload)
else -> {}
}
}
// 发送成功后才推进发送节拍统计与声道包序
if (audioChunk.size >= 5) {
val now = System.currentTimeMillis()
val deltaMs = if (lastAudioSendTime < 0) 0 else now - lastAudioSendTime
lastAudioSendTime = now
// 按声道统计各自的包序增量：正常应为 +1，出现非 +1 即说明该声道丢包或乱序
val seqGap = when (channelByte) {
OpusAudioManager.CHANNEL_LEFT -> {
val gap = if (lastLeftSeq < 0) 1L else seq.toLong() - lastLeftSeq
lastLeftSeq = seq.toLong()
gap
}
OpusAudioManager.CHANNEL_RIGHT -> {
val gap = if (lastRightSeq < 0) 1L else seq.toLong() - lastRightSeq
lastRightSeq = seq.toLong()
gap
}
else -> 0L
}
val gapTag = if (seqGap == 1L) "" else " !gap=$seqGap"
val sendLogLine = "音频下行发送 ch=$chTag seq=$seq Δ=${deltaMs}ms size=${audioChunk.size}B " +
"lastSeq(L=$lastLeftSeq,R=$lastRightSeq)$gapTag pace(L=${leftPaceTicks}x,R=${rightPaceTicks}x) " +
"hold(L=${leftHoldBuffer.size},R=${rightHoldBuffer.size}) queue=${audioSendQueue.size}"
// 每包都落文件：推送节拍(Δ)、档位(pace)、背压(hold/queue)、丢包(gap) 是控流排查的核心信号，需完整记录
CallLog.i(TAG, sendLogLine)
// [LAT-TRACE] 点3：右声道(对方译音)首包写到 BLE 耳机（每句首包）。
// 与 azure_speech 的 [LAT-TRACE] 点2(app收到译音) 同时钟相减 = app 内部下行耗时。
if (channelByte == OpusAudioManager.CHANNEL_RIGHT) {
if (now - latLastBleRightTs > 700) {
CallLog.i(TAG, "[LAT-TRACE] 3.译音写到BLE(右/对方) ts=$now seq=$seq")
}
latLastBleRightTs = now
} }
} }
// 发送节拍统计与包序日志
val now = System.currentTimeMillis()
val deltaMs = if (lastAudioSendTime < 0) 0 else now - lastAudioSendTime
lastAudioSendTime = now
val seqGap = when (channel) {
OpusAudioManager.CHANNEL_LEFT -> {
val gap = if (lastLeftSeq < 0) 1L else seq.toLong() - lastLeftSeq
lastLeftSeq = seq.toLong(); gap
}
OpusAudioManager.CHANNEL_RIGHT -> {
val gap = if (lastRightSeq < 0) 1L else seq.toLong() - lastRightSeq
lastRightSeq = seq.toLong(); gap
}
else -> 0L
}
val gapTag = if (seqGap == 1L) "" else " !gap=$seqGap"
CallLog.i(TAG, "音频下行发送 ch=$chTag seq=$seq Δ=${deltaMs}ms 帧=${realFrames.size}+静音$padCount size=${packet.size}B " +
"lastSeq(L=$lastLeftSeq,R=$lastRightSeq)$gapTag pace(L=${leftPaceTicks}x,R=${rightPaceTicks}x) " +
"buf(L=${leftSendBuffer.size},R=${rightSendBuffer.size})")
// [LAT-TRACE] 点3：右声道(对方译音)首包写到 BLE（每句首包）
if (channel == OpusAudioManager.CHANNEL_RIGHT) {
if (now - latLastBleRightTs > 700) {
CallLog.i(TAG, "[LAT-TRACE] 3.译音写到BLE(右/对方) ts=$now seq=$seq")
}
latLastBleRightTs = now
}
return true return true
} }
/** /**
* 将一包数据按其声道标记分流到对应的下行缓存，由发送线程按各自档位取出下发。 * 组下行包：[4B 序号(小端 uint32)] + [1B 声道(0=左/1=右)] + [N 帧 opus 顺次拼接]
* 仅作为安全阀：当某声道缓存超过 CHANNEL_HOLD_BUFFER_MAX 时丢弃最旧包并告警（正常流控不会触发）。
*/ */
private fun routeToHoldBuffer(chunk: ByteArray) { private fun buildBundlePacket(seq: Int, channel: Byte, frames: List<ByteArray>): ByteArray {
val channelTag = if (chunk.size >= 5) chunk[4] else null var payloadSize = 0
val buffer = when (channelTag) { for (f in frames) payloadSize += f.size
OpusAudioManager.CHANNEL_RIGHT -> rightHoldBuffer val packet = ByteArray(BUNDLE_HEADER_SIZE + payloadSize)
// 左声道及无有效声道标记(异常包)统一归入左缓存处理 packet[0] = (seq and 0xFF).toByte()
else -> leftHoldBuffer packet[1] = (seq ushr 8 and 0xFF).toByte()
packet[2] = (seq ushr 16 and 0xFF).toByte()
packet[3] = (seq ushr 24 and 0xFF).toByte()
packet[4] = channel
var offset = BUNDLE_HEADER_SIZE
for (f in frames) {
System.arraycopy(f, 0, packet, offset, f.size)
offset += f.size
} }
if (buffer.size >= CHANNEL_HOLD_BUFFER_MAX) { return packet
buffer.removeFirst()
CallLog.w(TAG, "声道积压缓存超上限($CHANNEL_HOLD_BUFFER_MAX)，丢弃最旧包 ch=${channelTag}")
}
buffer.addLast(chunk)
} }
/** /**
* 停止音频数据发送线程 * 停止左右两条音频发送线程并清空缓存
*/ */
private fun stopAudioSendThread() { private fun stopAudioSendThread() {
isAudioSending.set(false) isAudioSending.set(false)
audioSendThread?.interrupt() leftSendThread?.interrupt()
rightSendThread?.interrupt()
resetDownlinkBuffers() resetDownlinkBuffers()
CallLog.i(TAG, "音频发送线程已停止，队列和缓冲区已清空") CallLog.i(TAG, "音频发送线程(左/右)已停止，队列和缓冲区已清空")
} }
/** /**
@ -1718,15 +1726,13 @@ object BleService {
* 供停止发送线程(会话结束/清理)时调用；重连暂停期间**不**调用它——那时要保留缓存的译音待回连后续发。 * 供停止发送线程(会话结束/清理)时调用；重连暂停期间**不**调用它——那时要保留缓存的译音待回连后续发。
*/ */
private fun resetDownlinkBuffers() { private fun resetDownlinkBuffers() {
audioSendQueue.clear() leftSendBuffer.clear() // 清空左声道下行缓存队列
audioBuffer.clear() // 清空音频缓冲区 rightSendBuffer.clear() // 清空右声道下行缓存队列
leftHoldBuffer.clear() // 清空左声道下行缓存 audioBuffer.clear() // 清空音频缓冲区
rightHoldBuffer.clear() // 清空右声道下行缓存 leftPaceTicks = 1 // 档位复位为全速
leftPaceTicks = 1 // 档位复位为全速 40ms
rightPaceTicks = 1 rightPaceTicks = 1
lastLeftSendTick = -1L // 重置左右声道发送拍号 leftPacketSeq = 0 // 复位左右声道下行包序号
lastRightSendTick = -1L rightPacketSeq = 0
holdDrainPreferLeft = true
lastAudioSendTime = -1L // 重置发送节拍计时，下次首包 Δ 从 0 开始 lastAudioSendTime = -1L // 重置发送节拍计时，下次首包 Δ 从 0 开始
lastLeftSeq = -1L // 重置左右声道包序追踪 lastLeftSeq = -1L // 重置左右声道包序追踪
lastRightSeq = -1L lastRightSeq = -1L
@ -1746,7 +1752,7 @@ object BleService {
if (isDownlinkPaused) return if (isDownlinkPaused) return
isDownlinkPaused = true isDownlinkPaused = true
CallLog.i(TAG, "[CALL_RECONNECT] 下行音频已暂停(重连中)，译音继续缓存待回连后续发 " + CallLog.i(TAG, "[CALL_RECONNECT] 下行音频已暂停(重连中)，译音继续缓存待回连后续发 " +
"hold(L=${leftHoldBuffer.size},R=${rightHoldBuffer.size}) queue=${audioSendQueue.size}") "buf(L=${leftSendBuffer.size},R=${rightSendBuffer.size})")
} }
/** /**
@ -1755,16 +1761,14 @@ object BleService {
*/ */
private fun exitDownlinkPause() { private fun exitDownlinkPause() {
if (!isDownlinkPaused) return if (!isDownlinkPaused) return
// 复位节拍/档位(不动缓存)：从全速开始排空积压，F4/F5 会随即接管调速 // 复位档位(不动缓存)：从全速开始排空积压，F4/F5 会随即接管调速。
// 两声道线程内的 lastSendTick 会因 tick 已推进而立即到点，无需外部复位。
leftPaceTicks = 1 leftPaceTicks = 1
rightPaceTicks = 1 rightPaceTicks = 1
lastLeftSendTick = -1L
lastRightSendTick = -1L
holdDrainPreferLeft = true
lastAudioSendTime = -1L lastAudioSendTime = -1L
isDownlinkPaused = false isDownlinkPaused = false
CallLog.i(TAG, "[CALL_RECONNECT] 下行音频已恢复，档位复位全速续发缓存译音 " + CallLog.i(TAG, "[CALL_RECONNECT] 下行音频已恢复，档位复位全速续发缓存译音 " +
"hold(L=${leftHoldBuffer.size},R=${rightHoldBuffer.size}) queue=${audioSendQueue.size}") "buf(L=${leftSendBuffer.size},R=${rightSendBuffer.size})")
} }
/** /**
@ -1851,10 +1855,15 @@ object BleService {
Log.e(TAG, "蓝牙连接或特征值未准备就绪") Log.e(TAG, "蓝牙连接或特征值未准备就绪")
false false
} else { } else {
ch.value = chunk // 左右两条发送线程共用同一 callWriteChar(共享可变 .value)与同一 gatt，
val ok = gatt.writeCharacteristic(ch) == true // 必须串行化「设值+写入」这一段，否则并发写会互相覆盖 value，发出错误/重复数据。
if (ok) bytesSentInCurrentSecond += chunk.size // 锁只在提交这一瞬持有(WRITE_TYPE_NO_RESPONSE 不等 ACK)，配合右线程 20ms 错开，几乎不互相阻塞。
ok synchronized(bleWriteLock) {
ch.value = chunk
val ok = gatt.writeCharacteristic(ch) == true
if (ok) bytesSentInCurrentSecond += chunk.size
ok
}
} }
} catch (e: Exception) { } catch (e: Exception) {
Log.e(TAG, "发送音频数据块异常: ${e.message}", e) Log.e(TAG, "发送音频数据块异常: ${e.message}", e)
@ -2014,8 +2023,8 @@ object BleService {
Log.i(TAG, "[CALL_TRANS_DEBUG] 设置音频下行发送间隔: ${audioSendIntervalNormal}ms") Log.i(TAG, "[CALL_TRANS_DEBUG] 设置音频下行发送间隔: ${audioSendIntervalNormal}ms")
} }
if (bundleFrameCount != null && bundleFrameCount > 0) { if (bundleFrameCount != null && bundleFrameCount > 0) {
opusAudioManager.setBundleFrameCount(bundleFrameCount) this.bundleFrameCount = bundleFrameCount.coerceIn(1, 20)
Log.i(TAG, "[CALL_TRANS_DEBUG] 设置下行合包帧数: ${opusAudioManager.getBundleFrameCount()}") Log.i(TAG, "[CALL_TRANS_DEBUG] 设置下行合包帧数: ${this.bundleFrameCount}")
} }
// 三档控流：门限允许 0(第三档兜底)，故用 >=0 判定；发送间隔要求 >0 // 三档控流：门限允许 0(第三档兜底)，故用 >=0 判定；发送间隔要求 >0
if (t1FreeBytes != null && t1FreeBytes >= 0) tier1FreeBytes = t1FreeBytes if (t1FreeBytes != null && t1FreeBytes >= 0) tier1FreeBytes = t1FreeBytes
@ -2040,7 +2049,7 @@ object BleService {
fun getCallTranslationDebugParams(): Map<String, Any> { fun getCallTranslationDebugParams(): Map<String, Any> {
return mapOf( return mapOf(
"sendIntervalMs" to audioSendIntervalNormal, "sendIntervalMs" to audioSendIntervalNormal,
"bundleFrameCount" to opusAudioManager.getBundleFrameCount(), "bundleFrameCount" to bundleFrameCount,
"tier1FreeBytes" to tier1FreeBytes, "tier1FreeBytes" to tier1FreeBytes,
"tier1SendMs" to tier1SendMs, "tier1SendMs" to tier1SendMs,
"tier2FreeBytes" to tier2FreeBytes, "tier2FreeBytes" to tier2FreeBytes,

170
local_plugins/ble_service/android/src/main/kotlin/com/yunqiinnovation/ble_service/OpusAudioManager.kt
View File

@ -41,14 +41,8 @@ class OpusAudioManager {
// 双声道下行包声道标识：0=左(本端翻译) / 1=右(对端翻译) // 双声道下行包声道标识：0=左(本端翻译) / 1=右(对端翻译)
const val CHANNEL_LEFT: Byte = 0 const val CHANNEL_LEFT: Byte = 0
const val CHANNEL_RIGHT: Byte = 1 const val CHANNEL_RIGHT: Byte = 1
// 生成静音帧模板时喂入的零 PCM 长度(100ms@16k@16bit)，足够编码器产出至少一帧
// 下行合包默认帧数：左右各自累积 bundleFrameCount 帧 opus 合并为 1 包后才下发，降低 BLE 发送频率 private const val SILENCE_PCM_BYTES = 3200
// 调试界面可在运行时调整；通过 setBundleFrameCount() 修改
const val DEFAULT_BUNDLE_FRAME_COUNT = 5
@Volatile
private var bundleFrameCount = DEFAULT_BUNDLE_FRAME_COUNT
// 合包头部：bytes 0-3 序号(小端 uint32)，byte 4 声道标识(0=左/1=右)
private const val BUNDLE_HEADER_SIZE = 5
} }
// ====================================================================================================== // ======================================================================================================
@ -67,10 +61,17 @@ class OpusAudioManager {
fun onAudioDataDecoded(data: ByteArray, channel: Int) fun onAudioDataDecoded(data: ByteArray, channel: Int)
/** /**
* 音频数据编码完成回调 * 单帧 opus 编码完成回调（合包已上移到 BleService：这里只回单帧 + 声道，由 BleService 入对应队列）
* @param data 编码后的音频数据 * @param channelPrefix 声道标识(CHANNEL_LEFT=0 / CHANNEL_RIGHT=1)
* @param frame 一帧 opus 编码数据
*/
fun onAudioFrameEncoded(channelPrefix: Byte, frame: ByteArray)
/**
* 静音帧模板生成完成回调（运行时用独立编码器编码零 PCM 得到，供 BleService 合包不足帧时补齐）
* @param frame 一帧静音 opus 数据(长度与真实帧一致)
*/ */
fun onAudioDataEncoded(data: ByteArray) fun onSilenceFrameReady(frame: ByteArray)
/** /**
* 解码流状态变化回调 * 解码流状态变化回调
@ -111,12 +112,10 @@ class OpusAudioManager {
private var rightEncodeManager: OpusManager? = null private var rightEncodeManager: OpusManager? = null
private var isDualEncoding = false private var isDualEncoding = false
// 左右各自的 opus 帧缓存与发送序号；累满 bundleFrameCount 帧后打包下发 // 静音帧模板：启动双声道编码时用独立编码器编码零 PCM，捕获首帧作为补齐用静音帧(经 onSilenceFrameReady 交给 BleService)
private val bundleLock = Any() private var silenceEncodeManager: OpusManager? = null
private val leftBundleFrames = ArrayList<ByteArray>(DEFAULT_BUNDLE_FRAME_COUNT) @Volatile
private val rightBundleFrames = ArrayList<ByteArray>(DEFAULT_BUNDLE_FRAME_COUNT) private var capturedSilence: ByteArray? = null
private var leftBundleSeq = 0
private var rightBundleSeq = 0
// 上下文：用于双声道编码模式下，分别为左右声道写入 mono PCM WAV 调试文件 // 上下文：用于双声道编码模式下，分别为左右声道写入 mono PCM WAV 调试文件
private var appContext: Context? = null private var appContext: Context? = null
@ -172,6 +171,8 @@ class OpusAudioManager {
// 双声道独立编码器：左右各自维持独立的 OpusManager // 双声道独立编码器：左右各自维持独立的 OpusManager
leftEncodeManager = OpusManager() leftEncodeManager = OpusManager()
rightEncodeManager = OpusManager() rightEncodeManager = OpusManager()
// 静音帧模板专用编码器（仅编码一段零 PCM 取首帧）
silenceEncodeManager = OpusManager()
// 启动队列处理 // 启动队列处理
startAudioQueueProcessing() startAudioQueueProcessing()
@ -332,12 +333,6 @@ class OpusAudioManager {
Log.d(TAG, "已清理音频数据缓存") Log.d(TAG, "已清理音频数据缓存")
} }
// 重置合包发送序号
synchronized(bundleLock) {
leftBundleSeq = 0
rightBundleSeq = 0
}
Log.i(TAG, "已停止Opus数据流解码") Log.i(TAG, "已停止Opus数据流解码")
callback?.onDecodeStreamStateChanged(false) callback?.onDecodeStreamStateChanged(false)
return true return true
@ -389,8 +384,9 @@ class OpusAudioManager {
Log.d(TAG, "准备开始Opus数据流编码") Log.d(TAG, "准备开始Opus数据流编码")
encodeOpusManager?.startEncodeStream(object : OnEncodeStreamCallback { encodeOpusManager?.startEncodeStream(object : OnEncodeStreamCallback {
override fun onEncodeStream(data: ByteArray?) { override fun onEncodeStream(data: ByteArray?) {
// 旧单声道编码路径(非通话翻译)：单帧当左声道回给 BleService
if (data != null) { if (data != null) {
callback?.onAudioDataEncoded(data) callback?.onAudioFrameEncoded(CHANNEL_LEFT, data)
} }
} }
@ -438,13 +434,13 @@ class OpusAudioManager {
// ====================================================================================================== // ======================================================================================================
// 双声道独立编码方法（左右声道各用独立 OpusManager，互不污染预测状态） // 双声道独立编码方法（左右声道各用独立 OpusManager，互不污染预测状态）
// 输出格式：每包 = [4B 序号(小端 uint32)] + [1B 声道(0=左/1=右)] + [N × opus 帧] // 输出格式：每包 = [4B 序号(小端 uint32)] + [1B 声道(0=左/1=右)] + [N × opus 帧]
// 左右各自累积 bundleFrameCount 帧后打包一次，通过 onAudioDataEncoded 下发 // 每编出一帧即通过 onAudioFrameEncoded(声道, 帧) 回给 BleService；合包(取N帧/补静音/组头)由 BleService 完成。
// ====================================================================================================== // ======================================================================================================
/** /**
* 启动双声道独立编码流 * 启动双声道独立编码流
* 左右各创建独立 OpusManager；左右各自累积 5 帧 opus 后合包， * 左右各创建独立 OpusManager；左右各自累积 5 帧 opus 后合包，
* 通过 onAudioDataEncoded 输出一包（含 5 字节包头 + 5 帧 opus），由下游队列按节拍发送 * 每编出一帧即通过 onAudioFrameEncoded 单帧回给 BleService；同时用独立编码器编码零 PCM 生成静音帧模板
*/ */
fun startDualEncodeStream( fun startDualEncodeStream(
hasHeader: Boolean = false, hasHeader: Boolean = false,
@ -460,12 +456,7 @@ class OpusAudioManager {
return true return true
} }
synchronized(bundleLock) { capturedSilence = null
leftBundleFrames.clear()
rightBundleFrames.clear()
leftBundleSeq = 0
rightBundleSeq = 0
}
openPcmWavWriters(sampleRate) openPcmWavWriters(sampleRate)
@ -479,7 +470,8 @@ class OpusAudioManager {
return try { return try {
leftEncodeManager?.startEncodeStream(makeOption(), object : OnEncodeStreamCallback { leftEncodeManager?.startEncodeStream(makeOption(), object : OnEncodeStreamCallback {
override fun onEncodeStream(data: ByteArray?) { override fun onEncodeStream(data: ByteArray?) {
if (data != null) emitChannelFrame(CHANNEL_LEFT, data) // 单帧直接回给 BleService 入左队列，合包由 BleService 完成
if (data != null) callback?.onAudioFrameEncoded(CHANNEL_LEFT, data)
} }
override fun onStart() { Log.i(TAG, "左声道独立编码已开始") } override fun onStart() { Log.i(TAG, "左声道独立编码已开始") }
override fun onComplete(outPath: String?) {} override fun onComplete(outPath: String?) {}
@ -490,7 +482,7 @@ class OpusAudioManager {
}) })
rightEncodeManager?.startEncodeStream(makeOption(), object : OnEncodeStreamCallback { rightEncodeManager?.startEncodeStream(makeOption(), object : OnEncodeStreamCallback {
override fun onEncodeStream(data: ByteArray?) { override fun onEncodeStream(data: ByteArray?) {
if (data != null) emitChannelFrame(CHANNEL_RIGHT, data) if (data != null) callback?.onAudioFrameEncoded(CHANNEL_RIGHT, data)
} }
override fun onStart() { Log.i(TAG, "右声道独立编码已开始") } override fun onStart() { Log.i(TAG, "右声道独立编码已开始") }
override fun onComplete(outPath: String?) {} override fun onComplete(outPath: String?) {}
@ -502,6 +494,9 @@ class OpusAudioManager {
isDualEncoding = true isDualEncoding = true
callback?.onEncodeStreamStateChanged(true) callback?.onEncodeStreamStateChanged(true)
// 生成静音帧模板(异步)：独立编码器编码一段零 PCM，捕获首帧 → onSilenceFrameReady 交给 BleService 补齐用
startSilenceFrameCapture(makeOption())
CallLog.i(TAG, "双声道独立编码流已启动 sampleRate=$sampleRate packetSize=$packetSize") CallLog.i(TAG, "双声道独立编码流已启动 sampleRate=$sampleRate packetSize=$packetSize")
true true
} catch (e: Exception) { } catch (e: Exception) {
@ -519,18 +514,41 @@ class OpusAudioManager {
isDualEncoding = false isDualEncoding = false
try { leftEncodeManager?.stopEncodeStream() } catch (e: Exception) { Log.e(TAG, "停止左声道编码异常", e) } try { leftEncodeManager?.stopEncodeStream() } catch (e: Exception) { Log.e(TAG, "停止左声道编码异常", e) }
try { rightEncodeManager?.stopEncodeStream() } catch (e: Exception) { Log.e(TAG, "停止右声道编码异常", e) } try { rightEncodeManager?.stopEncodeStream() } catch (e: Exception) { Log.e(TAG, "停止右声道编码异常", e) }
synchronized(bundleLock) { try { silenceEncodeManager?.stopEncodeStream() } catch (e: Exception) { Log.e(TAG, "停止静音编码异常", e) }
leftBundleFrames.clear() capturedSilence = null
rightBundleFrames.clear()
leftBundleSeq = 0
rightBundleSeq = 0
}
closePcmWavWriters() closePcmWavWriters()
callback?.onEncodeStreamStateChanged(false) callback?.onEncodeStreamStateChanged(false)
CallLog.i(TAG, "双声道独立编码流已停止") CallLog.i(TAG, "双声道独立编码流已停止")
return true return true
} }
/**
* 启动静音帧模板捕获：用独立编码器编码一段零 PCM，捕获输出的首帧作为补齐用静音帧。
* 只喂一次零 PCM，取首帧即够用；捕获后经 onSilenceFrameReady 交给 BleService。异步，通常数十 ms 内就绪。
*/
private fun startSilenceFrameCapture(option: OpusOption) {
try {
silenceEncodeManager?.startEncodeStream(option, object : OnEncodeStreamCallback {
override fun onEncodeStream(data: ByteArray?) {
if (data != null && capturedSilence == null) {
capturedSilence = data
callback?.onSilenceFrameReady(data)
CallLog.i(TAG, "静音帧模板已生成 size=${data.size}B")
}
}
override fun onStart() {}
override fun onComplete(outPath: String?) {}
override fun onError(code: Int, message: String?) {
Log.w(TAG, "静音编码器错误 [$code] $message")
}
})
// 喂一段零 PCM 触发编码；产出首帧即被捕获，后续帧忽略
silenceEncodeManager?.writeEncodeStream(ByteArray(SILENCE_PCM_BYTES))
} catch (e: Exception) {
Log.w(TAG, "生成静音帧失败: ${e.message}")
}
}
/** /**
* 是否正在进行双声道独立编码 * 是否正在进行双声道独立编码
*/ */
@ -538,7 +556,7 @@ class OpusAudioManager {
/** /**
* 写入左声道 mono PCM（本端翻译音频） * 写入左声道 mono PCM（本端翻译音频）
* 累满 bundleFrameCount 帧 opus 后通过 onAudioDataEncoded 下发：[4B 序号] + [1B 声道=0] + [N × opus] * 每编出一帧即通过 onAudioFrameEncoded(左, 帧) 回给 BleService 入左队列
*/ */
fun writeLeftPcm(pcm: ByteArray) { fun writeLeftPcm(pcm: ByteArray) {
if (!isDualEncoding) { if (!isDualEncoding) {
@ -551,7 +569,7 @@ class OpusAudioManager {
/** /**
* 写入右声道 mono PCM（对端翻译音频） * 写入右声道 mono PCM（对端翻译音频）
* 累满 bundleFrameCount 帧 opus 后通过 onAudioDataEncoded 下发：[4B 序号] + [1B 声道=1] + [N × opus] * 每编出一帧即通过 onAudioFrameEncoded(右, 帧) 回给 BleService 入右队列
*/ */
fun writeRightPcm(pcm: ByteArray) { fun writeRightPcm(pcm: ByteArray) {
if (!isDualEncoding) { if (!isDualEncoding) {
@ -562,74 +580,6 @@ class OpusAudioManager {
rightEncodeManager?.writeEncodeStream(pcm) rightEncodeManager?.writeEncodeStream(pcm)
} }
/**
* 设置下行合包帧数（调试用）。取值范围 1..20，超出自动钳制。
* 立即生效：后续累满新帧数即打包下发，已缓存的不足帧待补满后随新值打包。
* @param count 每包累积的 opus 帧数
*/
fun setBundleFrameCount(count: Int) {
val clamped = count.coerceIn(1, 20)
bundleFrameCount = clamped
Log.i(TAG, "设置下行合包帧数: $clamped")
}
/**
* 获取当前下行合包帧数
*/
fun getBundleFrameCount(): Int = bundleFrameCount
/**
* 单帧入合包缓冲；左右各自累满 bundleFrameCount 帧后整包通过回调下发
* 输出包布局：[seq(4B 小端 uint32)] + [channel(1B)] + [N 帧 opus 顺次拼接]
*/
private fun emitChannelFrame(channelPrefix: Byte, opusFrame: ByteArray) {
val frameCount = bundleFrameCount
val packet: ByteArray? = synchronized(bundleLock) {
when (channelPrefix) {
CHANNEL_LEFT -> {
leftBundleFrames.add(opusFrame)
if (leftBundleFrames.size >= frameCount) {
val p = buildBundlePacket(leftBundleSeq, CHANNEL_LEFT, leftBundleFrames)
leftBundleSeq++
leftBundleFrames.clear()
p
} else null
}
CHANNEL_RIGHT -> {
rightBundleFrames.add(opusFrame)
if (rightBundleFrames.size >= frameCount) {
val p = buildBundlePacket(rightBundleSeq, CHANNEL_RIGHT, rightBundleFrames)
rightBundleSeq++
rightBundleFrames.clear()
p
} else null
}
else -> {
Log.w(TAG, "未知声道前缀: $channelPrefix")
null
}
}
}
if (packet != null) callback?.onAudioDataEncoded(packet)
}
private fun buildBundlePacket(seq: Int, channel: Byte, frames: List<ByteArray>): ByteArray {
var payloadSize = 0
for (f in frames) payloadSize += f.size
val packet = ByteArray(BUNDLE_HEADER_SIZE + payloadSize)
// 序号小端序：低字节在前
packet[0] = (seq and 0xFF).toByte()
packet[1] = (seq ushr 8 and 0xFF).toByte()
packet[2] = (seq ushr 16 and 0xFF).toByte()
packet[3] = (seq ushr 24 and 0xFF).toByte()
packet[4] = channel
var offset = BUNDLE_HEADER_SIZE
for (f in frames) {
System.arraycopy(f, 0, packet, offset, f.size)
offset += f.size
}
return packet
}
private fun openPcmWavWriters(sampleRate: Int) { private fun openPcmWavWriters(sampleRate: Int) {
val ctx = appContext ?: return val ctx = appContext ?: return

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