main.dart
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import 'dart:async';
import 'dart:typed_data';
import 'package:camera/camera.dart';
import 'package:flutter/material.dart';
import 'package:image/image.dart' as imglib;
import 'package:processing_camera_image/processing_camera_image.dart';
import 'package:rxdart/rxdart.dart';
void main() async {
WidgetsFlutterBinding.ensureInitialized();
runApp(const MyApp());
}
class MyApp extends StatelessWidget {
const MyApp({Key? key}) : super(key: key);
@override
Widget build(BuildContext context) {
return MaterialApp(
title: 'Flutter Demo',
theme: ThemeData(
primarySwatch: Colors.blue,
),
home: const MyHomePage(title: 'Flutter Demo Home Page'),
);
}
}
class MyHomePage extends StatefulWidget {
const MyHomePage({Key? key, required this.title}) : super(key: key);
final String title;
@override
State<MyHomePage> createState() => _MyHomePageState();
}
class _MyHomePageState extends State<MyHomePage> {
late final CameraController _cameraController;
late Future<void> _instanceInit;
final pipe = BehaviorSubject<CameraImage?>.seeded(null);
int count = 0;
final ProcessingCameraImage _processingCameraImage = ProcessingCameraImage();
imglib.Image? currentImage;
final stopwatch = Stopwatch();
void _processinngImage(CameraImage? value) async {
if (value != null) {
stopwatch.start();
currentImage = await Future.microtask(() => processImage(value));
stopwatch.stop();
print('this is time process: ${stopwatch.elapsedMilliseconds}');
stopwatch.reset();
// print(currentImage?.length);
}
}
@override
void initState() {
pipe.listen(_processinngImage);
_instanceInit = initCamera();
super.initState();
}
@override
void dispose() {
_cameraController.dispose();
super.dispose();
}
Future<void> initCamera() async {
final cameras = await availableCameras();
_cameraController = CameraController(cameras[1], ResolutionPreset.low);
await _cameraController.initialize();
await _cameraController.startImageStream((image) {
pipe.sink.add(image);
});
}
imglib.Image? processImage(CameraImage _savedImage) {
return _processingCameraImage.processCameraImageToRGB(
bytesPerPixelPlan1: _savedImage.planes[1].bytesPerPixel,
bytesPerRowPlane0: _savedImage.planes[0].bytesPerRow,
bytesPerRowPlane1: _savedImage.planes[1].bytesPerRow,
height: _savedImage.height,
plane0: _savedImage.planes[0].bytes,
plane1: _savedImage.planes[1].bytes,
plane2: _savedImage.planes[2].bytes,
rotationAngle: _cameraController.description.sensorOrientation.toDouble(),
width: _savedImage.width,
);
// return _processingCameraImage.processCameraImageToGray(
// height: _savedImage.height,
// width: _savedImage.width,
// plane0: _savedImage.planes[0].bytes,
// rotationAngle: _cameraController.description.sensorOrientation.toDouble(),
// );
}
@override
Widget build(BuildContext context) {
return Scaffold(
floatingActionButton: InkWell(
child: Container(
height: 100,
width: 100,
color: Colors.red,
),
onTap: () {
Navigator.push(
context,
MaterialPageRoute(
builder: (context) => Scaffold(
body: Center(
child: Image.memory(Uint8List.fromList(
imglib.encodeJpg(currentImage!))),
),
)));
},
),
body: Center(
child: FutureBuilder<void>(
future: _instanceInit,
builder: (context, snapshot) {
if (snapshot.connectionState == ConnectionState.done) {
return AspectRatio(
aspectRatio: 1 /
(_cameraController.value.previewSize?.aspectRatio ?? 4 / 3),
child: CameraPreview(_cameraController),
);
}
return const Center(
child: CircularProgressIndicator(),
);
},
),
),
);
}
}