iOS10原生的语音转文字功能
#import <Foundation/Foundation.h> #import <Speech/Speech.h> @interface SpeechListener : NSObject <SFSpeechRecognitionTaskDelegate,SFSpeechRecognizerDelegate> @property(nonatomic,strong)SFSpeechRecognizer *listener; @property(nonatomic,strong)SFSpeechRecognitionTask *currentTask; @property(nonatomic,assign)SFSpeechRecognizerAuthorizationStatus authorizationStatus; @property(nonatomic,strong)SFSpeechAudioBufferRecognitionRequest *currentRequest; @property(nonatomic,assign)BOOL inRecognizer; @property(nonatomic,copy)void (^haveRecognizerSpeakTextBlock)(NSString *text,NSTimeInterval startLocation,NSTimeInterval length); -(void)startRecognizer; -(void)giveBuffer:(CMSampleBufferRef)buffer; -(void)endRecognizer; @end
#import "SpeechListener.h" @interface SpeechListener() @property(nonatomic,copy)NSString *currentText; @property(nonatomic,assign)NSTimeInterval beginListenLocation; @end @implementation SpeechListener -(instancetype)init { self = [super init]; if (self) { self.listener = [[SFSpeechRecognizer alloc] initWithLocale:[NSLocale localeWithLocaleIdentifier:@"zh-CN"]]; [self.listener setDelegate:self]; [self requestAuthorizationStatus]; } return self; } -(void)requestAuthorizationStatus { typeof(self) __weak weakself = self; [SFSpeechRecognizer requestAuthorization:^(SFSpeechRecognizerAuthorizationStatus status) { typeof(weakself) __strong strongself = weakself; strongself.authorizationStatus = status; }]; } -(void)startRecognizer { self.beginListenLocation = CFAbsoluteTimeGetCurrent(); self.currentRequest = [[SFSpeechAudioBufferRecognitionRequest alloc] init]; [self.currentRequest setShouldReportPartialResults:YES]; typeof(self) __weak weakself = self; self.currentTask = [self.listener recognitionTaskWithRequest:self.currentRequest resultHandler:^(SFSpeechRecognitionResult *result, NSError *error) { typeof(weakself) __strong strongself = weakself; if (strongself.inRecognizer) { if (error != nil) { [strongself endRecognizer]; } else if(result != nil) { if (strongself.inRecognizer) { strongself.currentText = [[result bestTranscription] formattedString]; } if ([result isFinal]) { [strongself endRecognizer]; } } } if (error) { } }]; self.inRecognizer = YES; } -(void)endRecognizer { if (self.currentText.length > 0) { if (self.haveRecognizerSpeakTextBlock) { self.haveRecognizerSpeakTextBlock(self.currentText, self.beginListenLocation, CFAbsoluteTimeGetCurrent() - self.beginListenLocation); } } self.inRecognizer = NO; if (self.currentTask) { [self.currentTask cancel]; self.currentTask = nil; } if (self.currentRequest) { [self.currentRequest endAudio]; self.currentRequest = nil; } self.currentText = @""; } -(void)speechRecognizer:(SFSpeechRecognizer *)speechRecognizer availabilityDidChange:(BOOL)available { self.inRecognizer = !available; } -(void)giveBuffer:(CMSampleBufferRef)buffer { if (self.currentRequest) { [self.currentRequest appendAudioSampleBuffer:buffer]; } if (self.inRecognizer && (CFAbsoluteTimeGetCurrent() - self.beginListenLocation) > 30) { [self endRecognizer]; [self startRecognizer]; } } @end
https://www.politepix.com/openears/ 一款免费的识别工具
版权声明:本文为yuxiaoyiyou原创文章,遵循 CC 4.0 BY-SA 版权协议,转载请附上原文出处链接和本声明。