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feat: 1，新增星图对讲协议逻辑类与原始图片流方式区分隔离处理

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2，新增星图对讲接听指令具体细节逻辑处理
This commit is contained in:
“DaisyWu” 2024-12-09 15:58:28 +08:00
parent c7d26096fb
commit 23a9797e38
4 changed files with 415 additions and 253 deletions
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7
lib/main/lockDetail/monitoring/monitoring/lockMonitoring_logic.dart
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@ -23,6 +23,8 @@ class LockMonitoringLogic extends BaseGetXController {
state.voiceProcessor = VoiceProcessor.instance;
}
/*
旧协议暂时不用
/// 收到UDP发送的状态
StreamSubscription? _getUDPStatusRefreshUIEvent;
@ -55,6 +57,7 @@ class LockMonitoringLogic extends BaseGetXController {
}
});
}
*/
//发起接听命令，每隔一秒钟发一次，六秒无应答则失败
void initiateUdpAnswerAction() {
@ -413,7 +416,7 @@ class LockMonitoringLogic extends BaseGetXController {
void onReady() {
super.onReady();
_getUDPStatusRefreshUIAction();
// _getUDPStatusRefreshUIAction();
initRecorder();
}
@ -427,7 +430,7 @@ class LockMonitoringLogic extends BaseGetXController {
void onClose() {
CallTalk().finishAVData();
stopProcessing();
_getUDPStatusRefreshUIEvent!.cancel();
// _getUDPStatusRefreshUIEvent!.cancel();
state.getTVDataRefreshUIEvent!.cancel();
if (state.oneMinuteTimeTimer != null) {

444
lib/main/lockDetail/monitoring/monitoring/lockMonitoring_page.dart
View File

@ -1,5 +1,5 @@
import 'dart:async';
import 'dart:convert';
import 'dart:io';
import 'dart:ui' as ui;
@ -11,16 +11,17 @@ import 'package:flutter_screenutil/flutter_screenutil.dart';
import 'package:get/get.dart';
import 'package:image_gallery_saver/image_gallery_saver.dart';
import 'package:path_provider/path_provider.dart';
import 'package:star_lock/main/lockDetail/monitoring/monitoring/lockMonitoring_state.dart';
import 'package:star_lock/app_settings/app_colors.dart';
import 'package:star_lock/app_settings/app_settings.dart';
import 'package:star_lock/main/lockDetail/monitoring/monitoring/star_chart_logic.dart';
import 'package:star_lock/talk/call/callTalk.dart';
import 'package:star_lock/talk/startChart/start_chart_talk_status.dart';
import 'package:star_lock/talk/udp/udp_manage.dart';
import 'package:star_lock/tools/eventBusEventManage.dart';
import 'package:star_lock/tools/showTFView.dart';
import '../../../../app_settings/app_colors.dart';
import '../../../../app_settings/app_settings.dart';
import '../../../../login/selectCountryRegion/common/index.dart';
import '../../../../tools/showTFView.dart';
import 'lockMonitoring_logic.dart';
import 'lockMonitoring_state.dart';
class LockMonitoringPage extends StatefulWidget {
const LockMonitoringPage({Key? key}) : super(key: key);
@ -30,12 +31,13 @@ class LockMonitoringPage extends StatefulWidget {
}
class _LockMonitoringPageState extends State<LockMonitoringPage> {
final LockMonitoringLogic logic = Get.put(LockMonitoringLogic());
late final StarChartLogic logic;
final LockMonitoringState state = Get.find<LockMonitoringLogic>().state;
@override
void initState() {
super.initState();
logic = Get.put<StarChartLogic>(StarChartLogic());
initAsync();
_getTVDataRefreshUIAction();
}
@ -47,234 +49,210 @@ class _LockMonitoringPageState extends State<LockMonitoringPage> {
@override
Widget build(BuildContext context) {
return PopScope(
canPop: false,
child: RepaintBoundary(
key: state.globalKey,
child: Container(
width: 1.sw,
height: 1.sh,
color: Colors.transparent,
child: Stack(
children: <Widget>[
Image.memory(
state.listPhotoData.value,
gaplessPlayback: true,
width: 1.sw,
height: 1.sh,
fit: BoxFit.cover, //contain-原比例 none-原始图片
filterQuality: FilterQuality.high,
errorBuilder: (BuildContext context, Object error, StackTrace? stackTrace) {
return Container(color: Colors.transparent);
},
canPop: false,
child: RepaintBoundary(
key: state.globalKey,
child: Container(
width: 1.sw,
height: 1.sh,
color: Colors.transparent,
child: Stack(
children: <Widget>[
Image.memory(
state.listPhotoData.value,
gaplessPlayback: true,
width: 1.sw,
height: 1.sh,
fit: BoxFit.cover,
filterQuality: FilterQuality.high,
errorBuilder: (BuildContext context, Object error,
StackTrace? stackTrace) {
return Container(color: Colors.transparent);
},
),
Positioned(
top: ScreenUtil().statusBarHeight + 30.h,
width: 1.sw,
child: Obx(() {
final String sec = (state.oneMinuteTime.value % 60)
.toString()
.padLeft(2, '0');
final String min = (state.oneMinuteTime.value ~/ 60)
.toString()
.padLeft(2, '0');
return Row(
mainAxisAlignment: MainAxisAlignment.center,
children: <Widget>[
Text('$min:$sec',
style:
TextStyle(fontSize: 26.sp, color: Colors.white)),
],
);
}),
),
Positioned(
bottom: 10.w,
child: Container(
width: 1.sw - 30.w * 2,
margin: EdgeInsets.all(30.w),
decoration: BoxDecoration(
color: const Color(0xC83C3F41),
borderRadius: BorderRadius.circular(20.h),
),
child: Column(
children: <Widget>[
SizedBox(height: 20.h),
buildTopButtons(),
SizedBox(height: 20.h),
buildBottomButtons(),
SizedBox(height: 20.h),
],
),
),
Positioned(
top: ScreenUtil().statusBarHeight + 30.h,
width: 1.sw,
child: Obx(() {
final String sec = (state.oneMinuteTime.value % 60)
.toString()
.padLeft(2, '0');
final String min = (state.oneMinuteTime.value ~/ 60)
.toString()
.padLeft(2, '0');
return Row(
mainAxisAlignment: MainAxisAlignment.center,
children: <Widget>[
Text('$min:$sec',
style: TextStyle(
fontSize: 26.sp, color: Colors.white)),
]);
}),
),
Positioned(
bottom: 10.w,
child: Container(
width: 1.sw - 30.w * 2,
// height: 300.h,
margin: EdgeInsets.all(30.w),
decoration: BoxDecoration(
color: const Color(0xC83C3F41),
borderRadius: BorderRadius.circular(20.h)),
child: Column(
children: <Widget>[
SizedBox(height: 20.h),
bottomTopBtnWidget(),
SizedBox(height: 20.h),
bottomBottomBtnWidget(),
SizedBox(height: 20.h),
],
),
))
],
),
),
],
),
));
),
),
);
}
Widget bottomTopBtnWidget() {
return Row(mainAxisAlignment: MainAxisAlignment.center, children: <Widget>[
// 打开关闭声音
GestureDetector(
onTap: () {
state.isOpenVoice.value = !state.isOpenVoice.value;
},
child: Container(
width: 50.w,
height: 50.w,
padding: EdgeInsets.all(5.w),
child: Obx(() => Image(
width: 40.w,
height: 40.w,
image: state.isOpenVoice.value
? const AssetImage(
'images/main/icon_lockDetail_monitoringCloseVoice.png')
: const AssetImage(
'images/main/icon_lockDetail_monitoringOpenVoice.png'))),
Widget buildTopButtons() {
return Row(
mainAxisAlignment: MainAxisAlignment.center,
children: <Widget>[
buildIconButton(
icon: state.isOpenVoice.value
? 'images/main/icon_lockDetail_monitoringCloseVoice.png'
: 'images/main/icon_lockDetail_monitoringOpenVoice.png',
onTap: () {
state.isOpenVoice.value = !state.isOpenVoice.value;
},
),
),
SizedBox(width: 60.w),
// 截图
GestureDetector(
onTap: captureAndSavePng,
child: Container(
width: 50.w,
height: 50.w,
padding: EdgeInsets.all(5.w),
child: Image(
width: 40.w,
height: 40.w,
image: const AssetImage(
'images/main/icon_lockDetail_monitoringScreenshot.png')),
SizedBox(width: 60.w),
buildIconButton(
icon: 'images/main/icon_lockDetail_monitoringScreenshot.png',
onTap: captureAndSavePng,
),
),
SizedBox(width: 60.w),
// 录制
GestureDetector(
onTap: () {
// Get.toNamed(Routers.monitoringRealTimeScreenPage);
},
child: Container(
width: 50.w,
height: 50.w,
padding: EdgeInsets.all(5.w),
child: Image(
width: 40.w,
height: 40.w,
image: const AssetImage(
'images/main/icon_lockDetail_monitoringScreenRecording.png')),
SizedBox(width: 60.w),
buildIconButton(
icon: 'images/main/icon_lockDetail_monitoringScreenRecording.png',
onTap: () {
// Get.toNamed(Routers.monitoringRealTimeScreenPage);
},
),
),
]);
],
);
}
Widget bottomBottomBtnWidget() {
return Row(mainAxisAlignment: MainAxisAlignment.spaceEvenly, children: <Widget>[
// 接听
Obx(() => bottomBtnItemWidget(
state.isClickAnswer.value == true
? 'images/main/icon_lockDetail_monitoringUnTalkback.png'
: getAnswerBtnImg(),
state.isClickAnswer.value == true ? '长按说话'.tr : getAnswerBtnName(),
Colors.white, () async {
if (state.isClickAnswer.value == false) {
logic.initiateUdpAnswerAction();
state.isClickAnswer.value = true;
}
}, longPress: () {
// 开始长按
AppLog.log('onLongPress');
state.listAudioData.value = <int>[];
if (state.udpStatus.value == 8) {
state.udpStatus.value = 9;
}
// logic.readG711Data();
logic.startProcessing();
}, longPressUp: () async {
// 长按结束
AppLog.log('onLongPressUp');
if (state.udpStatus.value == 9) {
state.udpStatus.value = 8;
}
Widget buildBottomButtons() {
return Row(
mainAxisAlignment: MainAxisAlignment.spaceEvenly,
children: <Widget>[
buildAnswerButton(),
buildIconButton(
icon: 'images/main/icon_lockDetail_hangUp.png',
label: '挂断'.tr,
color: Colors.red,
onTap: () async {
logic.stopProcessing();
})),
bottomBtnItemWidget(
'images/main/icon_lockDetail_hangUp.png', '挂断'.tr, Colors.red, () async {
logic.stopProcessing();
CallTalk().finishAVData();
// 挂断
if (state.isClickHangUp.value == false) {
logic.initiateUdpHangUpAction(3);
state.isClickHangUp.value = true;
}
// else {
// AppLog.log('点了这里？');
// state.isClickHangUp.value = true;
// UDPTalkClass().stopLocalAudio();
// logic.initiateUdpHangUpAction(4);
// }
}),
bottomBtnItemWidget('images/main/icon_lockDetail_monitoringUnlock.png',
'开锁'.tr, AppColors.mainColor, () {
if (UDPManage().remoteUnlock == 1) {
showDeletPasswordAlertDialog(context);
} else {
logic.showToast('请在锁设置中开启远程开锁'.tr);
}
})
]);
CallTalk().finishAVData();
if (!state.isClickHangUp.value) {
// logic.initiateUdpHangUpAction(3);
logic.initiateHangUpCommand();
state.isClickHangUp.value = true;
}
},
),
buildIconButton(
icon: 'images/main/icon_lockDetail_monitoringUnlock.png',
label: '开锁'.tr,
color: AppColors.mainColor,
onTap: () {
if (UDPManage().remoteUnlock == 1) {
showDeletPasswordAlertDialog(context);
} else {
logic.showToast('请在锁设置中开启远程开锁'.tr);
}
},
),
],
);
}
String getAnswerBtnImg() {
switch (state.udpStatus.value) {
case 8:
return 'images/main/icon_lockDetail_monitoringUnTalkback.png';
case 9:
return 'images/main/icon_lockDetail_monitoringTalkback.png';
default:
return 'images/main/icon_lockDetail_monitoringAnswerCalls.png';
}
Widget buildAnswerButton() {
return Obx(() {
final bool isDuringCall =
state.talkStatus.value == TalkStatus.duringCall.index;
return buildIconButton(
icon: isDuringCall
? 'images/main/icon_lockDetail_monitoringUnTalkback.png'
: 'images/main/icon_lockDetail_monitoringAnswerCalls.png',
label: isDuringCall ? '长按说话'.tr : '接听'.tr,
onTap: () async {
if (!state.isClickAnswer.value) {
logic.initiateAnswerCommand();
state.isClickAnswer.value = true;
}
},
onLongPress: () {
state.listAudioData.value = <int>[];
// if (state.udpStatus.value == 8) {
// state.udpStatus.value = 9;
// }
logic.startProcessing();
},
onLongPressUp: () {
// if (state.udpStatus.value == 9) {
// state.udpStatus.value = 8;
// }
logic.stopProcessing();
},
);
});
}
String getAnswerBtnName() {
switch (state.udpStatus.value) {
case 8:
return '长按说话'.tr;
case 9:
return '松开发送'.tr;
default:
return '接听'.tr;
}
}
Widget bottomBtnItemWidget(
String iconUrl, String name, Color backgroundColor, Function() onClick,
{Function()? longPress, Function()? longPressUp}) {
Widget buildIconButton({
required String icon,
String? label,
Color color = Colors.white,
required Function() onTap,
Function()? onLongPress,
Function()? onLongPressUp,
}) {
final double wh = 80.w;
return GestureDetector(
onTap: onClick,
onLongPress: longPress,
onLongPressUp: longPressUp,
onTap: onTap,
onLongPress: onLongPress,
onLongPressUp: onLongPressUp,
child: SizedBox(
height: 140.h,
child: Column(
crossAxisAlignment: CrossAxisAlignment.center,
children: <Widget>[
Container(
width: wh,
height: wh,
decoration: BoxDecoration(
color: backgroundColor,
borderRadius: BorderRadius.circular((wh + 10.w * 2) / 2)),
padding: EdgeInsets.all(20.w),
child: Image.asset(iconUrl, fit: BoxFit.fitWidth),
height: 140.h,
child: Column(
crossAxisAlignment: CrossAxisAlignment.center,
children: <Widget>[
Container(
width: wh,
height: wh,
decoration: BoxDecoration(
color: color,
borderRadius: BorderRadius.circular((wh + 10.w * 2) / 2),
),
padding: EdgeInsets.all(20.w),
child: Image.asset(icon, fit: BoxFit.fitWidth),
),
if (label != null) ...[
SizedBox(height: 20.w),
Expanded(
child: Text(name,
style: TextStyle(fontSize: 20.sp, color: Colors.white),
textAlign: TextAlign.center))
child: Text(
label,
style: TextStyle(fontSize: 20.sp, color: Colors.white),
textAlign: TextAlign.center,
),
),
],
)),
],
),
),
);
}
@ -292,23 +270,18 @@ class _LockMonitoringPageState extends State<LockMonitoringPage> {
FilteringTextInputFormatter.allow(RegExp('[0-9]')),
],
sureClick: () async {
//发送删除锁请求
if (state.passwordTF.text.isEmpty) {
logic.showToast('请输入开锁密码'.tr);
return;
}
// List<int> numbers = state.passwordTF.text.split('').map((char) => int.parse(char)).toList();
// 开锁
// lockID
final List<int> numbers = <int>[];
final List<int> lockIDData = utf8.encode(state.passwordTF.text);
numbers.addAll(lockIDData);
// topBytes = getFixedLengthList(lockIDData, 20 - lockIDData.length);
for (int i = 0; i < 6 - lockIDData.length; i++) {
numbers.add(0);
}
logic.udpOpenDoorAction(numbers);
//todo: 开门暂未实现
// logic.udpOpenDoorAction(numbers);
},
cancelClick: () {
Get.back();
@ -318,16 +291,11 @@ class _LockMonitoringPageState extends State<LockMonitoringPage> {
);
}
//获取麦克风权限
Future requestMicrophonePermission() async {
Future<void> requestMicrophonePermission() async {
await logic.getPermissionStatus().then((bool value) async {
if (!value) {
return;
}
// state.isSenderAudioData.value = false;
// AppLog.log("发送接听了");
// 刚进来是接听状态，然后改为长按对讲
});
}
@ -348,15 +316,12 @@ class _LockMonitoringPageState extends State<LockMonitoringPage> {
}
final Uint8List pngBytes = byteData.buffer.asUint8List();
// 获取应用程序的文档目录
final Directory directory = await getApplicationDocumentsDirectory();
final String imagePath = '${directory.path}/screenshot.png';
// 将截图保存为文件
final File imgFile = File(imagePath);
await imgFile.writeAsBytes(pngBytes);
// 将截图保存到相册
await ImageGallerySaver.saveFile(imagePath);
AppLog.log('截图保存路径: $imagePath');
@ -366,30 +331,19 @@ class _LockMonitoringPageState extends State<LockMonitoringPage> {
}
}
/// 收到视频流数据
void _getTVDataRefreshUIAction() {
// 蓝牙协议通知传输跟蓝牙之外的数据传输类不一样 eventBus
state.getTVDataRefreshUIEvent =
eventBus.on<GetTVDataRefreshUI>().listen((GetTVDataRefreshUI event) async {
state.getTVDataRefreshUIEvent = eventBus
.on<GetTVDataRefreshUI>()
.listen((GetTVDataRefreshUI event) async {
if (event.tvList.isNotEmpty && event.tvList.length > 100) {
// 比较新旧数据是否相同
final Uint8List imageData = Uint8List.fromList(event.tvList);
if (!listEquals(state.listPhotoData.value, imageData)) {
// 更新状态
state.listPhotoData.value = imageData;
// 设置标志为true，表示需要更新UI
state.shouldUpdateUI.value = true;
// WidgetsBinding.instance.addPostFrameCallback((_) {
// 调用setState方法之前检查标志，只有当标志为true时才更新UI
if (state.shouldUpdateUI.value) {
setState(() {
// 更新UI
});
// 更新完UI后将标志重新设置为false
setState(() {});
state.shouldUpdateUI.value = false;
}
// });
}
}
});

11
lib/main/lockDetail/monitoring/monitoring/lockMonitoring_state.dart
View File

@ -5,6 +5,7 @@ import 'package:flutter/material.dart';
import 'package:flutter_voice_processor/flutter_voice_processor.dart';
import 'package:get/get.dart';
import 'package:network_info_plus/network_info_plus.dart';
import 'package:star_lock/talk/startChart/start_chart_talk_status.dart';
import '../../../../tools/storage.dart';
@ -18,8 +19,8 @@ class LockMonitoringState {
Future<String?> userMobileIP = NetworkInfo().getWifiIP();
Future<String?> userUid = Storage.getUid();
RxInt udpStatus =
0.obs; //0：初始状态 1：等待监视 2： 3：监视中 4：呼叫成功 5：主角通话中 6：被叫通话 8：被叫通话中 9：长按说话
// RxInt udpStatus =
// 0.obs; //0：初始状态 1：等待监视 2： 3：监视中 4：呼叫成功 5：主角通话中 6：被叫通话 8：被叫通话中 9：长按说话
TextEditingController passwordTF = TextEditingController();
Rx<Uint8List> listPhotoData = Uint8List(0).obs; //得到的视频流字节数据
@ -31,10 +32,6 @@ class LockMonitoringState {
RxBool isButtonDisabled = false.obs; //是否禁用按钮
final int frameLength = 320; //音视频帧长度为320
final int sampleRate = 8000; //音频采样率为8000
// final int volumeHistoryCapacity = 5; //音量历史记录的容量
// final double dbOffset = 50.0; //用于音量计算的偏移量
// var volumeHistory = <double>[].obs; //用于存储音量历史记录的列表
// var smoothedVolumeValue = 0.0.obs; //存储平滑后的音量值
RxString errorMessage = ''.obs;
List<List<int>> allFrames = <List<int>>[];
@ -55,4 +52,6 @@ class LockMonitoringState {
late Timer openDoorTimer = Timer(const Duration(seconds: 1), () {}); //开门命令定时器
RxInt openDoorSeconds = 0.obs;
RxInt talkStatus = 0.obs; //星图对讲状态
}

206
lib/main/lockDetail/monitoring/monitoring/star_chart_logic.dart Normal file
View File

@ -0,0 +1,206 @@
import 'dart:async';
import 'package:flutter/services.dart';
import 'package:flutter_voice_processor/flutter_voice_processor.dart';
import 'package:get/get.dart';
import 'package:permission_handler/permission_handler.dart';
import 'package:star_lock/app_settings/app_settings.dart';
import 'package:star_lock/talk/startChart/events/talk_status_change_event.dart';
import 'package:star_lock/talk/startChart/start_chart_manage.dart';
import 'package:star_lock/talk/startChart/start_chart_talk_status.dart';
import 'package:star_lock/tools/baseGetXController.dart';
import 'package:star_lock/tools/eventBusEventManage.dart';
import 'lockMonitoring_state.dart';
class StarChartLogic extends BaseGetXController {
final LockMonitoringState state = LockMonitoringState();
/// 收到Talk发送的状态
StreamSubscription? _getTalkStatusRefreshUIEvent;
@override
void onReady() {
super.onReady();
_getTalkStatusRefreshUIAction();
}
void _getTalkStatusRefreshUIAction() {
_getTalkStatusRefreshUIEvent = eventBus
.on<TalkStatusChangeEvent>()
.listen((TalkStatusChangeEvent event) async {
state.talkStatus.value = event.newStatus.index;
state.oneMinuteTime.value = 0;
if (state.talkStatus.value == TalkStatus.rejected.index) {
_cancelTimers();
return;
}
if (state.talkStatus.value == TalkStatus.duringCall.index) {
_startCallTimer();
}
});
}
void _startCallTimer() {
state.oneMinuteTimeTimer.cancel();
state.oneMinuteTimeTimer =
Timer.periodic(const Duration(seconds: 1), (Timer t) {
state.oneMinuteTime.value++;
if (state.oneMinuteTime.value >= 60) {
t.cancel();
initiateHangUpCommand();
AppLog.log('通话时间超过60秒，自动挂断');
state.oneMinuteTime.value = 0;
}
});
}
void _cancelTimers() {
state.oneMinuteTimeTimer.cancel();
state.answerTimer.cancel();
}
// 发起接听命令
void initiateAnswerCommand() {
state.answerTimer = Timer.periodic(const Duration(seconds: 1), (timer) {
StartChartManage().sendTalkAcceptMessage();
state.answerSeconds++;
if (state.talkStatus.value == TalkStatus.duringCall.index) {
state.answerTimer.cancel();
return;
}
if (state.answerSeconds >= 6) {
state.answerTimer.cancel();
showToast('接听失败'.tr);
initiateHangUpCommand();
}
});
}
// 发起挂断命令
void initiateHangUpCommand() {
_cancelTimers();
StartChartManage().sendTalkRejectMessage();
}
Future<void> _onFrame(List<int> frame) async {
state.allFrames.add(frame);
final List<int> concatenatedFrames = concatenateFrames(state.allFrames);
AppLog.log('pcm数据:$concatenatedFrames');
final List<int> pcmBytes = listLinearToULaw(frame);
//发起发送录音命令
// StartChartManage().sendTalkAudioMessage(pcmBytes);
}
List<int> listLinearToULaw(List<int> pcmList) {
return pcmList.map(linearToULaw).toList();
}
List<int> concatenateFrames(List<List<int>> frames) {
return frames.expand((frame) => frame).toList();
}
Future<void> startProcessing() async {
state.isButtonDisabled.value = true;
state.voiceProcessor?.addFrameListener(_onFrame);
state.voiceProcessor?.addErrorListener(_onError);
try {
if (await state.voiceProcessor?.hasRecordAudioPermission() ?? false) {
await state.voiceProcessor?.start(state.frameLength, state.sampleRate);
state.isProcessing.value =
await state.voiceProcessor?.isRecording() ?? false;
} else {
state.errorMessage.value = 'Recording permission not granted';
}
} on PlatformException catch (ex) {
state.errorMessage.value = 'Failed to start recorder: $ex';
} finally {
state.isButtonDisabled.value = false;
}
}
void _onError(VoiceProcessorException error) {
state.errorMessage.value = error.message!;
}
Future<void> stopProcessing() async {
state.isButtonDisabled.value = true;
try {
await state.voiceProcessor?.stop();
state.voiceProcessor?.removeFrameListener(_onFrame);
state.udpSendDataFrameNumber = 0;
} on PlatformException catch (ex) {
state.errorMessage.value = 'Failed to stop recorder: $ex';
} finally {
state.isProcessing.value =
await state.voiceProcessor?.isRecording() ?? false;
state.isButtonDisabled.value = false;
}
}
int linearToULaw(int pcmVal) {
int mask;
int seg;
int uval;
if (pcmVal < 0) {
pcmVal = 0x84 - pcmVal;
mask = 0x7F;
} else {
pcmVal += 0x84;
mask = 0xFF;
}
seg = search(pcmVal);
if (seg >= 8) {
return 0x7F ^ mask;
} else {
uval = seg << 4;
uval |= (pcmVal >> (seg + 3)) & 0xF;
return uval ^ mask;
}
}
int search(int val) {
final List<int> table = [
0xFF,
0x1FF,
0x3FF,
0x7FF,
0xFFF,
0x1FFF,
0x3FFF,
0x7FFF
];
for (int i = 0; i < table.length; i++) {
if (val <= table[i]) {
return i;
}
}
return table.length;
}
Future<bool> getPermissionStatus() async {
const Permission permission = Permission.microphone;
final PermissionStatus status = await permission.status;
if (status.isGranted) {
return true;
} else if (status.isDenied || status.isRestricted) {
await requestPermission(permission);
} else if (status.isPermanentlyDenied) {
openAppSettings();
}
return false;
}
Future<void> requestPermission(Permission permission) async {
final PermissionStatus status = await permission.request();
if (status.isPermanentlyDenied) {
openAppSettings();
}
}
}