From 2568f15bda4174a5fe95462aa83f8395459f03d2 Mon Sep 17 00:00:00 2001
From: duoaohui <928970622@qq.com>
Date: Sat, 23 May 2026 18:55:47 +0800
Subject: [PATCH] =?UTF-8?q?=E8=A7=86=E9=A2=91=E4=BC=9A=E8=AE=AE?=
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---
 frontend/src/pages/cloud-law/video-call.vue | 85 ++++++++++++++++++---
 1 file changed, 76 insertions(+), 9 deletions(-)

diff --git a/frontend/src/pages/cloud-law/video-call.vue b/frontend/src/pages/cloud-law/video-call.vue
index 50acd0d..4c971db 100644
--- a/frontend/src/pages/cloud-law/video-call.vue
+++ b/frontend/src/pages/cloud-law/video-call.vue
@@ -302,6 +302,8 @@ const startTimer = () => {
   }
 }
 
+const localMediaError = ref('')
+
 const joinMeeting = async () => {
   if (joining.value) return
   const code = formattedCode.value
@@ -330,12 +332,13 @@ const joinMeeting = async () => {
       startAudio: true,
       startVideo: startWithVideo
     }
-    await meetingStore.joinAndEnter(code, '', {
-      startAudio: true,
-      startVideo: startWithVideo,
-      audioDeviceId: '',
-      videoDeviceId: ''
-    })
+
+    // 关键：和 preview.vue 一致，进会前先 getUserMedia 拿到 audio+video 的原始 track，
+    // 再把 track 直接交给 joinAndEnter 复用，避免 mediasoup 入会后再次 getUserMedia
+    // 在 iOS Safari/微信 WebView 上触发 NotReadableError / 权限拒绝。
+    const prefs = await prepareLocalMediaTracks(startWithVideo)
+
+    await meetingStore.joinAndEnter(code, '', prefs)
     startTimer()
     scheduleVideoRetry()
   } catch (err) {
@@ -346,6 +349,53 @@ const joinMeeting = async () => {
   }
 }
 
+/**
+ * 进会前同步申请本地音视频。与 preview.vue 同策略：
+ * 一次 getUserMedia 拿到 audio + video track 直接交给 mediasoup produce，
+ * 避免入会后再调 getUserMedia 在某些 WebView/Safari 里失败导致黑屏。
+ */
+const prepareLocalMediaTracks = async (startWithVideo) => {
+  const prefs = {
+    startAudio: true,
+    startVideo: startWithVideo,
+    audioDeviceId: '',
+    videoDeviceId: '',
+    audioTrack: null,
+    videoTrack: null
+  }
+  // #ifdef H5
+  if (typeof navigator === 'undefined' || !navigator.mediaDevices || !navigator.mediaDevices.getUserMedia) {
+    console.warn('[CloudLawVideoCall] navigator.mediaDevices 不可用，跳过预申请')
+    return prefs
+  }
+  try {
+    const constraints = {
+      audio: true,
+      video: startWithVideo
+        ? { width: { ideal: 640 }, height: { ideal: 480 }, frameRate: { ideal: 15, max: 24 }, facingMode: 'user' }
+        : false
+    }
+    const stream = await navigator.mediaDevices.getUserMedia(constraints)
+    prefs.audioTrack = stream.getAudioTracks()[0] || null
+    prefs.videoTrack = stream.getVideoTracks()[0] || null
+    // 如果用户拒了视频，stream 里不会有 video track，自动降级为不开摄像头
+    if (startWithVideo && !prefs.videoTrack) {
+      prefs.startVideo = false
+    }
+    if (!prefs.audioTrack) {
+      prefs.startAudio = false
+    }
+  } catch (err) {
+    console.error('[CloudLawVideoCall] prepare media failed', err)
+    localMediaError.value = `预申请音视频失败：${err?.name || ''} ${err?.message || err}`
+    // 拿不到也继续走 joinAndEnter，让后端协议建好；用户可以在入会后手动点麦/摄像头按钮重试
+    prefs.startAudio = false
+    prefs.startVideo = false
+  }
+  // #endif
+  return prefs
+}
+
 const scheduleVideoRetry = () => {
   if (isVoiceMode.value || videoRetryHandle || videoEnabled.value) return
   videoRetryHandle = setTimeout(async () => {
@@ -354,7 +404,16 @@ const scheduleVideoRetry = () => {
     try {
       await meetingStore.startLocalVideo()
     } catch (err) {
-      console.warn('[CloudLawVideoCall] retry start video failed', err)
+      console.error('[CloudLawVideoCall] retry start video failed', err)
+      localMediaError.value = `自动开摄像头失败：${err?.message || err}`
+    }
+    if (!meetingStore.localAudioEnabled) {
+      try {
+        await meetingStore.startLocalAudio()
+      } catch (err) {
+        console.error('[CloudLawVideoCall] retry start audio failed', err)
+        localMediaError.value = `${localMediaError.value || ''} | 自动开麦克风失败：${err?.message || err}`
+      }
     }
   }, 800)
 }
@@ -367,9 +426,13 @@ const onMicToggle = async () => {
       await meetingStore.stopLocalAudio()
     } else {
       await meetingStore.startLocalAudio()
+      localMediaError.value = ''
     }
   } catch (err) {
-    uni.showToast({ title: err?.message || '麦克风操作失败', icon: 'none' })
+    console.error('[CloudLawVideoCall] mic toggle failed', err)
+    const msg = err?.message || '麦克风操作失败'
+    localMediaError.value = `麦克风：${msg}`
+    uni.showModal({ title: '麦克风开启失败', content: msg, showCancel: false })
   } finally {
     audioLoading.value = false
   }
@@ -383,9 +446,13 @@ const onCamToggle = async () => {
       await meetingStore.stopLocalVideo()
     } else {
       await meetingStore.startLocalVideo()
+      localMediaError.value = ''
     }
   } catch (err) {
-    uni.showToast({ title: err?.message || '摄像头操作失败', icon: 'none' })
+    console.error('[CloudLawVideoCall] cam toggle failed', err)
+    const msg = err?.message || '摄像头操作失败'
+    localMediaError.value = `摄像头：${msg}`
+    uni.showModal({ title: '摄像头开启失败', content: msg, showCancel: false })
   } finally {
     videoLoading.value = false
   }