EngineX-Iluvatar/enginex-mr_series-sherpa-onnx
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Handle invalid utf8 sequence from Whisper for Dart API. (#1106)

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Fixes #1104
This commit is contained in:
Fangjun Kuang
2024-07-10 21:48:23 +08:00
committed by GitHub
parent 08c758520f
commit 5a2603ff5c
4 changed files with 33 additions and 2 deletions
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4
CHANGELOG.md
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@@ -1,3 +1,7 @@
## 1.10.14 (to-be-released)
* Fix invalid utf8 sequence from Whisper for Dart API.
## 1.10.13
* Update onnxruntime from 1.17.1 to 1.18.0

3
flutter/sherpa_onnx/lib/src/offline_recognizer.dart
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@@ -7,6 +7,7 @@ import 'package:ffi/ffi.dart';
import './feature_config.dart';
import './offline_stream.dart';
import './sherpa_onnx_bindings.dart';
import './utils.dart';
class OfflineTransducerModelConfig {
const OfflineTransducerModelConfig({
@@ -287,7 +288,7 @@ class OfflineRecognizer {
return OfflineRecognizerResult(text: '', tokens: [], timestamps: []);
}
final parsedJson = jsonDecode(json.toDartString());
final parsedJson = jsonDecode(toDartString(json));
SherpaOnnxBindings.destroyOfflineStreamResultJson?.call(json);

3
flutter/sherpa_onnx/lib/src/online_recognizer.dart
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@@ -7,6 +7,7 @@ import 'package:ffi/ffi.dart';
import './feature_config.dart';
import './online_stream.dart';
import './sherpa_onnx_bindings.dart';
import './utils.dart';
class OnlineTransducerModelConfig {
const OnlineTransducerModelConfig({
@@ -268,7 +269,7 @@ class OnlineRecognizer {
return OnlineRecognizerResult(text: '', tokens: [], timestamps: []);
}
final parsedJson = jsonDecode(json.toDartString());
final parsedJson = jsonDecode(toDartString(json));
SherpaOnnxBindings.destroyOnlineStreamResultJson?.call(json);

25
flutter/sherpa_onnx/lib/src/utils.dart Normal file
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@@ -0,0 +1,25 @@
// Copyright (c) 2024 Xiaomi Corporation
import 'dart:convert';
import 'dart:ffi';
import 'dart:typed_data';
import 'package:ffi/ffi.dart';
int _strLen(Pointer<Uint8> codeUnits) {
// this function is copied from
// https://github.com/dart-archive/ffi/blob/main/lib/src/utf8.dart#L52
var length = 0;
while (codeUnits[length] != 0) {
length++;
}
return length;
}
// This function is modified from
// https://github.com/dart-archive/ffi/blob/main/lib/src/utf8.dart#L41
// It ignores invalid utf8 sequence
String toDartString(Pointer<Utf8> s) {
final codeUnits = s.cast<Uint8>();
final length = _strLen(codeUnits);
return utf8.decode(codeUnits.asTypedList(length), allowMalformed: true);
}