iOS之简单语音听写功能

//
//  ViewController.h
//  VoiceIdentify
//
//  Created by 涂婉丽 on 16/1/22.
//  Copyright © 2016年 涂婉丽. All rights reserved.
//

#import 
#import "iflyMSC/iflyMSC.h"
@class IFlyDataUploader;
@class IFlySpeechRecognizer;
@interface ViewController : UIViewController
@property (nonatomic, strong) NSString *pcmFilePath;//音频文件路径
@property (nonatomic, strong) IFlySpeechRecognizer *iFlySpeechRecognizer;//不带界面的识别对象
@property (nonatomic, strong) IFlyRecognizerView *iflyRecognizerView;//带界面的识别对象
@property (nonatomic, strong) IFlyDataUploader *uploader;//数据上传对象
- (IBAction)resignizeAction;
@property (unsafe_unretained, nonatomic) IBOutlet UITextView *textView;
@property (nonatomic, strong) NSString * result;
@end

//  ViewController.m
//  VoiceIdentify
//
//  Created by 涂婉丽 on 16/1/22.
//  Copyright © 2016年 涂婉丽. All rights reserved.
//

#import "ViewController.h"
#import 
#import "ISRDataHelper.h"
#define APPID_VALUE           @"56a1b495"
#define TIMEOUT_VALUE         @"20000"

#import "iflyMSC/IFlyMSC.h"
@interface ViewController ()

@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    
    self.uploader = [[IFlyDataUploader alloc] init];
    
    //demo录音文件保存路径
    NSArray *paths = NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES);
    NSString *cachePath = [paths objectAtIndex:0];
    _pcmFilePath = [[NSString alloc] initWithFormat:@"%@",[cachePath stringByAppendingPathComponent:@"asr.pcm"]];
    _textView.clipsToBounds = YES;
    _textView.layer.cornerRadius = 5;
    _textView.layer.borderColor=[UIColor lightGrayColor].CGColor;
    _textView.layer.borderWidth = 0.5;
}
- (void)viewWillAppear:(BOOL)animated
{

    [super viewWillAppear:animated];
    [self initRecognizer ];
}
- (void)didReceiveMemoryWarning {
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

- (IBAction)resignizeAction {
//    if(_iflyRecognizerView == nil)
//    {
//        [self initRecognizer ];
//    }
    
    [_textView setText:@""];
    [_textView resignFirstResponder];
    
    //设置音频来源为麦克风
    [_iflyRecognizerView setParameter:IFLY_AUDIO_SOURCE_MIC forKey:@"audio_source"];
    
    //设置听写结果格式为json
    [_iflyRecognizerView setParameter:@"plain" forKey:[IFlySpeechConstant RESULT_TYPE]];
    
    //保存录音文件，保存在sdk工作路径中，如未设置工作路径，则默认保存在library/cache下
    [_iflyRecognizerView setParameter:@"asr.pcm" forKey:[IFlySpeechConstant ASR_AUDIO_PATH]];
    
    [_iflyRecognizerView start];
}
- (void)initRecognizer
{
    NSLog(@"%s",__func__);
    
    _iflyRecognizerView = [[IFlyRecognizerView alloc] initWithCenter:self.view.center];
    _iflyRecognizerView.delegate = self;
    [_iflyRecognizerView setParameter: @"iat" forKey: [IFlySpeechConstant IFLY_DOMAIN]];
    //asr_audio_path保存录音文件名，如不再需要，设置value为nil表示取消，默认目录是documents
    [_iflyRecognizerView setParameter:@"asrview.pcm " forKey:[IFlySpeechConstant ASR_AUDIO_PATH]];
    
    _iflyRecognizerView.delegate = self;
    
    
    
    //设置最长录音时间
    [_iflyRecognizerView setParameter:@"30000" forKey:[IFlySpeechConstant SPEECH_TIMEOUT]];
    //设置后端点
    [_iflyRecognizerView setParameter:@"3000" forKey:[IFlySpeechConstant VAD_EOS]];
    //设置前端点
    [_iflyRecognizerView setParameter:@"3000" forKey:[IFlySpeechConstant VAD_BOS]];
    //网络等待时间
    [_iflyRecognizerView setParameter:@"20000" forKey:[IFlySpeechConstant NET_TIMEOUT]];
    
    //设置采样率，推荐使用16K
    [_iflyRecognizerView setParameter:@"16000" forKey:[IFlySpeechConstant SAMPLE_RATE]];
    //设置语言
    [_iflyRecognizerView setParameter:@"zh_cn" forKey:[IFlySpeechConstant LANGUAGE]];
    //设置是否返回标点符号
    [_iflyRecognizerView setParameter:@"1" forKey:[IFlySpeechConstant ASR_PTT]];
    
}
/**
 无界面，听写结果回调
 results：听写结果
 isLast：表示最后一次
 ****/
- (void) onResults:(NSArray *) results isLast:(BOOL)isLast
{
    
    NSMutableString *resultString = [[NSMutableString alloc] init];
    NSDictionary *dic = results[0];
    for (NSString *key in dic) {
        [resultString appendFormat:@"%@",key];
    }
    _result =[NSString stringWithFormat:@"%@%@", _textView.text,resultString];
    NSString * resultFromJson =  [ISRDataHelper stringFromJson:resultString];
    _textView.text = [NSString stringWithFormat:@"%@%@", _textView.text,resultFromJson];
    
    if (isLast){
        NSLog(@"听写结果(json)：%@测试",  self.result);
    }
    NSLog(@"_result=%@",_result);
    NSLog(@"resultFromJson=%@",resultFromJson);
    NSLog(@"isLast=%d,_textView.text=%@",isLast,_textView.text);
}
/**
 有界面，听写结果回调
 resultArray：听写结果
 isLast：表示最后一次
 ****/
- (void)onResult:(NSArray *)resultArray isLast:(BOOL)isLast
{
    NSLog(@"---------------%@",resultArray);
    NSLog(@"bbbbbbbbbbbbb%d",isLast);
    NSMutableString *result = [[NSMutableString alloc] init];
    NSDictionary *dic = [resultArray objectAtIndex:0];
    NSLog(@"==============%@",dic);
    for (NSString *key in dic) {
        [result appendFormat:@"%@",key];
    }
    _textView.text = [NSString stringWithFormat:@"%@%@",_textView.text,result];
}
/**
 开始识别回调
 ****/
- (void) onBeginOfSpeech
{
    NSLog(@"onBeginOfSpeech");
}

/**
 停止录音回调
 ****/
- (void) onEndOfSpeech
{
    NSLog(@"onEndOfSpeech");
    
}
/**
 听写结束回调（注：无论听写是否正确都会回调）
 error.errorCode =
 0     听写正确
 other 听写出错
 ****/
- (void) onError:(IFlySpeechError *) error
{
    NSLog(@"%s",__func__);
    
    NSLog(@"errorCode:%d",[error errorCode]);
 
}
@end

#import 

@interface ISRDataHelper : NSObject


// 解析命令词返回的结果
+ (NSString*)stringFromAsr:(NSString*)params;

/**
 解析JSON数据
 ****/
+ (NSString *)stringFromJson:(NSString*)params;//


/**
 解析语法识别返回的结果
 ****/
+ (NSString *)stringFromABNFJson:(NSString*)params;

@end

#import "ISRDataHelper.h"

@implementation ISRDataHelper

/**
 解析命令词返回的结果
 ****/
+ (NSString*)stringFromAsr:(NSString*)params;
{
    NSMutableString * resultString = [[NSMutableString alloc]init];
    NSString *inputString = nil;
    
    NSArray *array = [params componentsSeparatedByString:@"\n"];
    
    for (int  index = 0; index     {
        NSRange range;
        NSString *line = [array objectAtIndex:index];
        
        NSRange idRange = [line rangeOfString:@"id="];
        NSRange nameRange = [line rangeOfString:@"name="];
        NSRange cOnfidenceRange= [line rangeOfString:@"cOnfidence="];
        NSRange grammarRange = [line rangeOfString:@" grammar="];
        
        NSRange inputRange = [line rangeOfString:@"input="];
        
        if (confidenceRange.length == 0 || grammarRange.length == 0 || inputRange.length == 0 )
        {
            continue;
        }
        
        //check nomatch
        if (idRange.length!=0) {
            NSUInteger idPosX = idRange.location + idRange.length;
            NSUInteger idLength = nameRange.location - idPosX;
            range = NSMakeRange(idPosX,idLength);
            NSString *idValue = [[line substringWithRange:range]
                                 stringByTrimmingCharactersInSet: [NSCharacterSet whitespaceAndNewlineCharacterSet] ];
            if ([idValue isEqualToString:@"nomatch"]) {
                return @"";
            }
        }
        
        //Get Confidence Value
        NSUInteger cOnfidencePosX= confidenceRange.location + confidenceRange.length;
        NSUInteger cOnfidenceLength= grammarRange.location - confidencePosX;
        range = NSMakeRange(confidencePosX,confidenceLength);
        
        
        NSString *score = [line substringWithRange:range];
        
        NSUInteger inputStringPosX = inputRange.location + inputRange.length;
        NSUInteger inputStringLength = line.length - inputStringPosX;
        
        range = NSMakeRange(inputStringPosX , inputStringLength);
        inputString = [line substringWithRange:range];
        
        [resultString appendFormat:@"%@ 置信度%@\n",inputString, score];
    }
    
    return resultString;
    
}

/**
 解析听写json格式的数据
 params例如：
 {"sn":1,"ls":true,"bg":0,"ed":0,"ws":[{"bg":0,"cw":[{"w":"白日","sc":0}]},{"bg":0,"cw":[{"w":"依山","sc":0}]},{"bg":0,"cw":[{"w":"尽","sc":0}]},{"bg":0,"cw":[{"w":"黄河入海流","sc":0}]},{"bg":0,"cw":[{"w":"。","sc":0}]}]}
 ****/
+ (NSString *)stringFromJson:(NSString*)params
{
    if (params == NULL) {
        return nil;
    }
    
    NSMutableString *tempStr = [[NSMutableString alloc] init];
    NSDictionary *resultDic  = [NSJSONSerialization JSONObjectWithData:    //返回的格式必须为utf8的,否则发生未知错误
                                [params dataUsingEncoding:NSUTF8StringEncoding] options:kNilOptions error:nil];

    if (resultDic!= nil) {
        NSArray *wordArray = [resultDic objectForKey:@"ws"];
        
        for (int i = 0; i <[wordArray count]; i++) {
            NSDictionary *wsDic = [wordArray objectAtIndex: i];
            NSArray *cwArray = [wsDic objectForKey:@"cw"];
            
            for (int j = 0; j <[cwArray count]; j++) {
                NSDictionary *wDic = [cwArray objectAtIndex:j];
                NSString *str = [wDic objectForKey:@"w"];
                [tempStr appendString: str];
            }
        }
    }
    return tempStr;
}


/**
 解析语法识别返回的结果
 ****/
+ (NSString *)stringFromABNFJson:(NSString*)params
{
    if (params == NULL) {
        return nil;
    }
    NSMutableString *tempStr = [[NSMutableString alloc] init];
    NSDictionary *resultDic  = [NSJSONSerialization JSONObjectWithData:
                                [params dataUsingEncoding:NSUTF8StringEncoding] options:kNilOptions error:nil];
    
    NSArray *wordArray = [resultDic objectForKey:@"ws"];
        for (int i = 0; i <[wordArray count]; i++) {
            NSDictionary *wsDic = [wordArray objectAtIndex: i];
            NSArray *cwArray = [wsDic objectForKey:@"cw"];
            
            for (int j = 0; j <[cwArray count]; j++) {
                NSDictionary *wDic = [cwArray objectAtIndex:j];
                NSString *str = [wDic objectForKey:@"w"];
                NSString *score = [wDic objectForKey:@"sc"];
                [tempStr appendString: str];
                [tempStr appendFormat:@" 置信度:%@",score];
                [tempStr appendString: @"\n"];
            }
        }
    return tempStr;
}

@end

好想睡觉－－－－－－－－－－－