iOS 录音,播放,转码MP3,上传语音文件

//语音文件

AVAudioRecorder *recorder;

NSTimer *timer;

NSString *urlPlay;

BOOL isPlay;

#pragma mark ========= 语音文件 ==========
- (void)audio
{
    AVAudioSession *a=[AVAudioSession sharedInstance];
    [a setCategory:AVAudioSessionCategoryPlayAndRecord error:nil];
    [a setActive:YES error:nil];
    //录音设置
    NSMutableDictionary *recordSetting = [[NSMutableDictionary alloc] init];
    //录音格式无法使用
    [recordSetting setValue :[NSNumber numberWithInt:kAudioFormatLinearPCM] forKey: AVFormatIDKey];
    //采样率
    [recordSetting setValue :[NSNumber numberWithFloat:44100] forKey: AVSampleRateKey];//44100.0
    //通道数
    [recordSetting setValue :[NSNumber numberWithInt:2] forKey: AVNumberOfChannelsKey];
    //线性采样位数
    [recordSetting setValue :[NSNumber numberWithInt:16] forKey: AVLinearPCMBitDepthKey];
    //音频质量,采样质量
    [recordSetting setValue:[NSNumber numberWithInt:AVAudioQualityMin] forKey:AVEncoderAudioQualityKey];

    NSString *strUrl = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) lastObject];
    urlPlay = [NSString stringWithFormat:@"%@/lll.lpcm", strUrl];


    NSError *error;
    //初始化
    recorder = [[AVAudioRecorder alloc]initWithURL:[NSURL URLWithString:urlPlay] settings:recordSetting error:&error];
    //开启音量检测
    recorder.meteringEnabled = YES;
    recorder.delegate = self;

}

//开始录音
- (IBAction)speak_touchDown:(id)sender {
    if(isPlay==NO){
        _speakBackView.frame=CGRectMake(ScreenWidth/2-75,ScreenHeight/2-130,150, 150);
        _speakBackView.backgroundColor=[UIColor colorWithWhite:0.000 alpha:0.6];
        _speakBackView.layer.cornerRadius=10;
        _speakBackView.clipsToBounds=YES;
        [self.view addSubview:_speakBackView];

        //创建录音文件，准备录音
        if ([recorder prepareToRecord]) {
            //开始
            [recorder record];
        }
        //设置定时检测
        timer = [NSTimer scheduledTimerWithTimeInterval:0 target:self selector:@selector(detectionVoice) userInfo:nil repeats:YES];
    }
}

//拖动取消录音
- (IBAction)speak_drag:(id)sender {

    if(isPlay==NO){
        [_speakBackView removeFromSuperview];
        //删除录制文件
        [recorder deleteRecording];
        [recorder stop];
        [timer invalidate];
    }
}

//录音完成
- (IBAction)speak_touchUpinset:(id)sender {
    [timer invalidate];
    if (isPlay==NO) {
        [_speakBackView removeFromSuperview];
        double cTime = recorder.currentTime;
        if (cTime > 1) {//如果录制时间<2 不发送
            NSLog(@"发出去");
            //显示录音时间
            [_btn_speak setTitle:[NSString stringWithFormat:@"%.1lf" 播放",cTime] forState:UIControlStateNormal];

            //录音时候的标志
            UIImage *image=[UIImage imageNamed:@"speak_read"];
            image=[image imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal];
            [_btn_speak setImage:image forState:UIControlStateNormal];
            _btn_cancelSpeak.hidden=NO;

isPlay=YES;

//新开线程进行解码

            [NSThread detachNewThreadSelector:@selector(audio_PCMtoMP3) toTarget:self withObject:nil];
        }else {
            //删除记录的文件

[recorder deleteRecording];

}
[recorder stop];

}

    //点击时候播放与暂停
    else{
        if (self.avPlay.playing) {
            [_btn_speak setTitle:[NSString stringWithFormat:@"%.1lf" 播放",_avPlay.duration] forState:UIControlStateNormal];
            [self.avPlay stop];
            return;
        }
        [_btn_speak setTitle:@"暂停" forState:UIControlStateNormal];
        AVAudioPlayer *player = [[AVAudioPlayer alloc]initWithContentsOfURL:[NSURL URLWithString:urlPlay] error:nil];
        self.avPlay = player;
        self.avPlay.delegate=self;
        [self.avPlay prepareToPlay];
        [self.avPlay play];
         NSLog(@"%f",_avPlay.duration);
    }
}

//删除录音文件
- (IBAction)cancelSpeak:(id)sender {
    [_avPlay stop];
     _saveModel.speakUrl=nil;
    [recorder deleteRecording];
    isPlay=NO;
    _btn_cancelSpeak.hidden=YES;
    [_btn_speak setTitle:@"按住说话" forState:UIControlStateNormal];
    [_btn_speak setImage:nil forState:UIControlStateNormal];
}

- (void)detectionVoice
{
    [recorder updateMeters];//刷新音量数据
    //获取音量的平均值 [recorder averagePowerForChannel:0];
    //音量的最大值 [recorder peakPowerForChannel:0];
    double lowPassResults = pow(10, (0.05 * [recorder peakPowerForChannel:0]));
    NSLog(@"%lf",lowPassResults);
    if(0<lowPassResults&&lowPassResults<=0.125) {
        [_speak_iamgeV setImage:[UIImage imageNamed:@"record_animate_01"]];
    }else if (0.125<lowPassResults&&lowPassResults<=0.25) {
        [_speak_iamgeV setImage:[UIImage imageNamed:@"record_animate_02"]];
    }else if (0.25<lowPassResults&&lowPassResults<=0.375) {
        [_speak_iamgeV setImage:[UIImage imageNamed:@"record_animate_03"]];
    }else if (0.375<lowPassResults&&lowPassResults<=0.50) {
        [_speak_iamgeV setImage:[UIImage imageNamed:@"record_animate_04"]];
    }else if (0.50<lowPassResults&&lowPassResults<=0.625) {
        [_speak_iamgeV setImage:[UIImage imageNamed:@"record_animate_05"]];
    }else if (0.625<lowPassResults&&lowPassResults<=0.75) {
        [_speak_iamgeV setImage:[UIImage imageNamed:@"record_animate_06"]];
    }else if (0.75<lowPassResults&&lowPassResults<=0.875) {
        [_speak_iamgeV setImage:[UIImage imageNamed:@"record_animate_07"]];
    }else {
        [_speak_iamgeV setImage:[UIImage imageNamed:@"record_animate_08"]];
    }
}
- (void)audioPlayerDidFinishPlaying:(AVAudioPlayer *)player successfully:(BOOL)flag{
    [_btn_speak setTitle:[NSString stringWithFormat:@"%.1lf" 播放",_avPlay.duration] forState:UIControlStateNormal];
}

#pragma mark ===== 转换成MP3文件=====
- (void)audio_PCMtoMP3
{
    NSString *strUrl = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) lastObject];

    //NSString *mp3FileName = [strUrl lastPathComponent];
    //mp3FileName = [mp3FileName stringByAppendingString:@".mp3"];
    NSString *mp3FilePath = [strUrl stringByAppendingPathComponent:@"lll.mp3"];

    @try {
        int read, write;

        FILE *pcm = fopen([urlPlay cStringUsingEncoding:1], "rb"); //source 被转换的音频文件位置
        fseek(pcm, 4*1024, SEEK_CUR);                                   //skip file header
        FILE *mp3 = fopen([mp3FilePath cStringUsingEncoding:1], "wb"); //output 输出生成的Mp3文件位置

        const int PCM_SIZE = 8192;
        const int MP3_SIZE = 8192;
        short int pcm_buffer[PCM_SIZE*2];
        unsigned char mp3_buffer[MP3_SIZE];

        lame_t lame = lame_init();
        lame_set_in_samplerate(lame, 44100);
        lame_set_VBR(lame, vbr_default);
        lame_init_params(lame);

        do {
            read = fread(pcm_buffer, 2*sizeof(short int), PCM_SIZE, pcm);
            if (read == 0)
                write = lame_encode_flush(lame, mp3_buffer, MP3_SIZE);
            else
                write = lame_encode_buffer_interleaved(lame, pcm_buffer, read, mp3_buffer, MP3_SIZE);

            fwrite(mp3_buffer, write, 1, mp3);

        } while (read != 0);

        lame_close(lame);
        fclose(mp3);
        fclose(pcm);
    }
    @catch (NSException *exception) {
        NSLog(@"%@",[exception description]);
    }
    @finally {
        strUrl = mp3FilePath;
        _saveModel.speakUrl=[NSURL URLWithString:strUrl];
        NSLog(@"MP3生成成功: %@",strUrl);
    }

}

#pragma mark ========= 上传 ==========

[self.httpMgr POST:@"http://xuyingtest.sinaapp.com/uploadfile.php" parameters:nilconstructingBodyWithBlock:^ void(id<AFMultipartFormData> formData) {

[formData appendPartWithFileURL:self.audioReorder.url name:@"file" error:nil];

} success:^ void(AFHTTPRequestOperation * operation, id responseObject) {

NSDictionary *dict=[NSJSONSerialization JSONObjectWithData:responseObject options:NSJSONReadingAllowFragments error:nil];

if (dict[@"error"]) {

NSLog(@" up success error :%@",dict[@"error"]);

}

else

{

NSLog(@"upload file ok!:%@",dict[@"success"]);

}

} failure:^void(AFHTTPRequestOperation * operation, NSError * error) {

NSLog(@"%@",error.localizedDescription);

}];