/
native_g711.dart
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/
native_g711.dart
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import 'dart:async';
import 'dart:ffi';
import 'dart:io';
import 'package:ffi/ffi.dart';
import 'package:flutter/services.dart';
import 'g711_codec.dart';
final DynamicLibrary _g711 = Platform.isAndroid
? DynamicLibrary.open('libg711.so')
: DynamicLibrary.process();
final int Function(int x, int y) native_add = _g711
.lookup<NativeFunction<Int32 Function(Int32, Int32)>>('native_add')
.asFunction();
final native_add_func = _g711.lookupFunction<Int32 Function(Int32, Int32),
int Function(int x, int y)>('native_add');
final _pcm16_ulaw_tableinit = _g711
.lookupFunction<Void Function(), void Function()>('pcm16_ulaw_tableinit');
final _ulaw_pcm16_tableinit = _g711
.lookupFunction<Void Function(), void Function()>('ulaw_pcm16_tableinit');
final _pcm16_alaw_tableinit = _g711
.lookupFunction<Void Function(), void Function()>('pcm16_alaw_tableinit');
final _alaw_pcm16_tableinit = _g711
.lookupFunction<Void Function(), void Function()>('alaw_pcm16_tableinit');
final _ulaw_to_pcm16 = _g711.lookupFunction<
Void Function(Int32, Pointer<Uint8>, Pointer<Uint8>),
void Function(int, Pointer<Uint8>, Pointer<Uint8>)>('ulaw_to_pcm16');
final _pcm16_to_ulaw = _g711.lookupFunction<
Void Function(Int32, Pointer<Uint8>, Pointer<Uint8>),
void Function(int, Pointer<Uint8>, Pointer<Uint8>)>('pcm16_to_ulaw');
final _alaw_to_pcm16 = _g711.lookupFunction<
Void Function(Int32, Pointer<Uint8>, Pointer<Uint8>),
void Function(int, Pointer<Uint8>, Pointer<Uint8>)>('alaw_to_pcm16');
final _pcm16_to_alaw = _g711.lookupFunction<
Void Function(Int32, Pointer<Uint8>, Pointer<Uint8>),
void Function(int, Pointer<Uint8>, Pointer<Uint8>)>('pcm16_to_alaw');
class NativeG711Codec extends G711Codec {
@Deprecated('Use NativeG711Codec.g711u instead')
factory NativeG711Codec() = NativeG711Codec.g711u;
NativeG711Codec.g711u()
: this._(_pcm16_to_ulaw, _ulaw_to_pcm16, () {
_pcm16_ulaw_tableinit();
_ulaw_pcm16_tableinit();
});
NativeG711Codec.g711a()
: this._(_pcm16_to_alaw, _alaw_to_pcm16, () {
_pcm16_alaw_tableinit();
_alaw_pcm16_tableinit();
});
NativeG711Codec._(this.pcm_to_law, this.law_to_pcm, this._initTable) {
if (!_initiated) {
_initiated = true;
_initTable();
}
}
var _initiated = false;
final void Function() _initTable;
final void Function(int, Pointer<Uint8>, Pointer<Uint8>) pcm_to_law;
final void Function(int, Pointer<Uint8>, Pointer<Uint8>) law_to_pcm;
void forcePreloadTable() {
_initTable();
}
@override
Uint8List encode(Uint8List pcm) {
final inSize = pcm.length;
final outSize = inSize ~/ 2;
final inArray = calloc<Uint8>(inSize);
final outArray = calloc<Uint8>(outSize);
inArray.asTypedList(pcm.length).setAll(0, pcm);
pcm_to_law(inSize, inArray, outArray);
final out = Uint8List.fromList(outArray.asTypedList(outSize));
calloc.free(outArray);
calloc.free(inArray);
return out;
}
@override
Uint8List decode(Uint8List g711) {
final inSize = g711.length;
final outSize = inSize * 2;
final inArray = calloc<Uint8>(inSize);
final outArray = calloc<Uint8>(outSize);
inArray.asTypedList(g711.length).setAll(0, g711);
law_to_pcm(inSize, inArray, outArray);
final out = Uint8List.fromList(outArray.asTypedList(outSize));
calloc.free(outArray);
calloc.free(inArray);
return out;
}
static const MethodChannel _channel = MethodChannel('g711_flutter');
static Future<String?> get platformVersion async {
final String? version = await _channel.invokeMethod('getPlatformVersion');
return version;
}
}