g711_flutter 2.1.1 g711_flutter: ^2.1.1 copied to clipboard
PCM to G711 Fast Conversions
import 'dart:async';
import 'dart:developer';
import 'dart:math' as math;
import 'dart:typed_data';
import 'package:flutter/foundation.dart';
import 'package:flutter/material.dart';
import 'package:flutter/services.dart';
import 'package:g711_flutter/g711_flutter.dart';
import 'package:g711_flutter_example/sound_button.dart';
void main() {
runApp(const MyApp());
}
class MyApp extends StatefulWidget {
const MyApp({Key? key}) : super(key: key);
@override
State<MyApp> createState() => _MyAppState();
}
class _MyAppState extends State<MyApp> {
String _platformVersion = 'Unknown';
late NativeG711Codec g711 = NativeG711Codec.g711u();
@override
void initState() {
super.initState();
initPlatformState();
}
// Platform messages are asynchronous, so we initialize in an async method.
Future<void> initPlatformState() async {
String platformVersion;
// Platform messages may fail, so we use a try/catch PlatformException.
// We also handle the message potentially returning null.
try {
platformVersion =
await NativeG711Codec.platformVersion ?? 'Unknown platform version';
} on PlatformException {
platformVersion = 'Failed to get platform version.';
}
// If the widget was removed from the tree while the asynchronous platform
// message was in flight, we want to discard the reply rather than calling
// setState to update our non-existent appearance.
if (!mounted) return;
setState(() {
_platformVersion = platformVersion;
});
}
@override
Widget build(BuildContext context) {
return MaterialApp(
home: Scaffold(
appBar: AppBar(
title: const Text('Plugin example app'),
),
body: Column(
children: [
Text(
'Running on: $_platformVersion\n${native_add(1, 2) + native_add_func(3, 4)}'),
const SoundButton(),
OutlinedButton(
onPressed: () {
final nativeG711u = NativeG711Codec.g711u();
final nativeG711a = NativeG711Codec.g711a();
final dartG711u = DartG711Codec.g711u();
final dartG711a = DartG711Codec.g711a();
final pcm16 = Uint8List.sublistView(
Int16List.fromList([1, -1, 0xffff, 0, 0x7fff, 0x8000]));
final ulaw1 = nativeG711u.encode(pcm16);
final ulaw2 = dartG711u.encode(pcm16);
final pcm1 = nativeG711u.decode(ulaw1);
final pcm2 = dartG711u.decode(ulaw2);
final alaw1 = nativeG711a.encode(pcm16);
final alaw2 = dartG711a.encode(pcm16);
final pcm11 = nativeG711a.decode(alaw1);
final pcm12 = dartG711a.decode(alaw2);
log('''
pcm16: $pcm16
ulaw1: $ulaw1
ulaw2: $ulaw2
pcm1: $pcm1
pcm2: $pcm2
alaw1: $alaw1
alaw2: $alaw2
pcm11: $pcm11
pcm12: $pcm12
''');
},
child: const Text('check result'),
),
OutlinedButton(
onPressed: () {
final w = Stopwatch()..start();
final g1 = NativeG711Codec.g711u();
final g2 = DartG711Codec.g711u();
w.printElapsed('native.preload', () => g1.forcePreloadTable());
w.printElapsed('dart .preload', () => g2.forcePreloadTable());
final random = math.Random();
final pcm16 = Uint8List.fromList(List.generate(
1024 * 1024, (index) => random.nextInt(0xff)));
final ulaw1 =
w.printElapsed('native.encode', () => g1.encode(pcm16));
final ulaw2 =
w.printElapsed('dart .encode', () => g2.encode(pcm16));
final pcm1 =
w.printElapsed('native.decode', () => g1.decode(ulaw1));
final pcm2 =
w.printElapsed('dart .decode', () => g2.decode(ulaw2));
},
child: const Text('performance test'),
),
],
),
),
);
}
}
extension StopwatchExt on Stopwatch {
R printElapsed<R>(String tag, R Function() block, {printResult = false}) {
reset();
final result = block();
final elapsed = this.elapsed;
print('$tag: $elapsed ${printResult ? result : ''}');
return result;
}
}