问题描述
我知道有多个线程存在相同的问题,但是我无法使其解决方案正常工作.我最终创建了此类:
I'm aware that there are several threads with the same problem, but i haven't been able to make their solution work. I ended up creating this class:
MicroController.h
MicroController.h
#import Foundation/Foundation.h>
#import <AVFoundation/AVFoundation.h>
#import <CoreAudio/CoreAudioTypes.h>
#import <UIKit/UIKit.h>
@interface MicroController : UIView < UITextFieldDelegate, UIImagePickerControllerDelegate, UINavigationControllerDelegate, AVAudioSessionDelegate > {
AVAudioRecorder *recorder;
NSTimer *levelTimer;
double lowPassResults;
}
- (void)levelTimerCallback:(NSTimer *)timer;
@end
MicroController.mm
MicroController.mm
#import "MicroController.h"
@implementation MicroController
- (id)init
{
NSURL *url = [NSURL fileURLWithPath:@"/dev/null"];
NSDictionary *settings = [NSDictionary dictionaryWithObjectsAndKeys:
[NSNumber numberWithFloat: 44100.0], AVSampleRateKey,
[NSNumber numberWithInt: kAudioFormatAppleLossless], AVFormatIDKey,
[NSNumber numberWithInt: 1], AVNumberOfChannelsKey,
[NSNumber numberWithInt: AVAudioQualityMax], AVEncoderAudioQualityKey,
nil];
NSError *error;
recorder = [[AVAudioRecorder alloc] initWithURL:url settings:settings error:&error];
if (recorder) {
[recorder prepareToRecord];
recorder.meteringEnabled = YES;
if ([recorder prepareToRecord] == YES){
[recorder record];
}else {
int errorCode = CFSwapInt32HostToBig ([error code]);
NSLog(@"Error: %@ [%4.4s])" , [error localizedDescription], (char*)&errorCode);
}
levelTimer = [NSTimer scheduledTimerWithTimeInterval: 0.03 target: self selector: @selector(levelTimerCallback:) userInfo: nil repeats: YES];
} else
NSLog([error description]);
// input 'level' is in meter.mAveragePower
return self;
}
- (void)levelTimerCallback:(NSTimer *)timer {
[recorder updateMeters];
const double ALPHA = 1.0; // 0.05f
double peakPowerForChannel = pow(10, (0.05 * [recorder peakPowerForChannel:0]));
lowPassResults = ALPHA * peakPowerForChannel + (1.0 - ALPHA) * lowPassResults;
if (lowPassResults > 0.55)
NSLog(@"Mic blow detected");
[recorder updateMeters];
NSLog(@"Average input: %f Peak input: %f", [recorder averagePowerForChannel:0], [recorder peakPowerForChannel:0]);
}
- (void)viewDidLoad {
[super viewDidLoad];
NSLog(@"initiated");
NSURL *url = [NSURL fileURLWithPath:@"/dev/null"];
NSDictionary *settings = [NSDictionary dictionaryWithObjectsAndKeys:
[NSNumber numberWithFloat: 44100.0], AVSampleRateKey,
[NSNumber numberWithInt: kAudioFormatAppleLossless], AVFormatIDKey,
[NSNumber numberWithInt: 1], AVNumberOfChannelsKey,
[NSNumber numberWithInt: AVAudioQualityMax], AVEncoderAudioQualityKey,
nil];
NSError *error;
recorder = [[AVAudioRecorder alloc] initWithURL:url settings:settings error:&error];
if (recorder) {
[recorder prepareToRecord];
recorder.meteringEnabled = YES;
[recorder record];
levelTimer = [NSTimer scheduledTimerWithTimeInterval: 0.03 target: self selector: @selector(levelTimerCallback:) userInfo: nil repeats: YES];
} else
NSLog([error description]);
}
- (void)dealloc {
[levelTimer release];
[recorder release];
[super dealloc];
}
@end
但是我无法使麦克风正常工作.我仅收到此输出,并且麦克风永不响应:
But I can't get to make the microphone work. I'm getting only this output, and the microphone never responds:
平均输入:-120.000000峰值输入:-120.000000
Average input: -120.000000 Peak input: -120.000000
关于什么是错的任何想法?
Any idea about what can be wrong ?
感谢您的帮助!
推荐答案
好吧,我不认为提及我正在团结一致,这是罪魁祸首.
Well, I didn't think important to mention that i was working with unity, and it was the culprit.
Unity修改了一些设置,因此在加载ViewController时一定要这样做:
Unity modifies some settings, so it's important to do this when you load your viewcontroller:
[[AVAudioSession sharedInstance]
setCategory: AVAudioSessionCategoryPlayAndRecord
error: &setCategoryError];
if (setCategoryError) {
NSLog([setCategoryError description]);
}
否则,完美编写的录音机将无法正常工作.就是这样..问题解决了!
Otherwise a perfectly written audiorecorder won't work correctly. And that was it..problem solved !
此错误是一个易于检测的错误,希望此消息对处于同样困境的其他人有所帮助.
This bug was a PAIN to detect, I hope this message helps anyone else in the same predicament.
这篇关于如何使用Unity和IOS检测麦克风中的打击的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持!