У меня та же проблема, в случае, если я использую Титаниум appcelerator. В симуляторе класс работает корректно, а в устройстве нет, Средний вход = -120
Вот код:
//
// MicController.h
// Mic
//
// Created by DekWilde on 10/26/11.
// Copyright 2011 DekWilde. All rights reserved.
//
#import <UIKit/UIKit.h>
#import <Foundation/Foundation.h>
#import <AVFoundation/AVFoundation.h>
#import <CoreAudio/CoreAudioTypes.h>
@interface MicController : NSObject {
AVAudioRecorder *recorder;
//NSTimer *levelTimer;
double lowPassResults;
}
+ (MicController *)sharedListener;
- (void)listen;
- (void)stop;
//- (void)levelTimerCallback:(NSTimer *)timer;
- (Float32)averagePower;
- (Float32)peakPower;
@end
и MicController.m
#import "MicController.h"
static MicController *sharedListener = nil;
@implementation MicController
+ (MicController *)sharedListener {
@synchronized(self) {
if (sharedListener == nil)
[[self alloc] init];
}
return sharedListener;
}
- (void)dealloc {
//[sharedListener stop];
//[levelTimer release];
[recorder release];
[super dealloc];
}
#pragma mark -
#pragma mark Listening
- (void)listen {
NSURL *url = [NSURL fileURLWithPath:@"/dev/null"];
//kAudioFormatAppleIMA4
//kAudioFormatMPEG4AAC
/*
NSMutableDictionary *settings = [NSMutableDictionary dictionaryWithObjectsAndKeys:
[NSNumber numberWithFloat: 44100.0], AVSampleRateKey,
[NSNumber numberWithInt: kAudioFormatAppleLossless], AVFormatIDKey,
[NSNumber numberWithInt: 1], AVNumberOfChannelsKey,
[NSNumber numberWithInt: AVAudioQualityMax], AVEncoderAudioQualityKey,
nil];
*/
NSDictionary *settings = [[NSDictionary alloc] initWithObjectsAndKeys:
[NSNumber numberWithFloat: 44100.0], AVSampleRateKey,
[NSNumber numberWithInt: kAudioFormatAppleLossless], AVFormatIDKey,
[NSNumber numberWithInt: 2], AVNumberOfChannelsKey,
[NSNumber numberWithInt: AVAudioQualityMax], AVEncoderAudioQualityKey,
nil];
/*
[NSNumber numberWithFloat: 44100.0], AVSampleRateKey,
[NSNumber numberWithInt: kAudioFormatMPEG4AAC], AVFormatIDKey,
[NSNumber numberWithInt: 2], AVNumberOfChannelsKey,
[NSNumber numberWithInt: AVAudioQualityMax], AVEncoderAudioQualityKey,
[NSNumber numberWithInt:16], AVLinearPCMBitDepthKey,
[NSNumber numberWithBool:NO], AVLinearPCMIsBigEndianKey,
[NSNumber numberWithBool:NO], AVLinearPCMIsFloatKey,
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)stop {
[recorder release];
}
/*
- (void)levelTimerCallback:(NSTimer *)timer {
[recorder updateMeters];
const double ALPHA = 0.05;
double peakPowerForChannel = pow(10, (0.05 * [recorder peakPowerForChannel:0]));
lowPassResults = ALPHA * peakPowerForChannel + (1.0 - ALPHA) * lowPassResults;
//if (lowPassResults < 0.95)
//NSLog(@"Mic blow detected");
NSLog(@"Average input: %f Peak input: %f Low pass results: %f", [recorder averagePowerForChannel:0], [recorder peakPowerForChannel:0], lowPassResults);
}
*/
#pragma mark -
#pragma mark Levels getters
- (Float32)averagePower {
[recorder updateMeters];
const double ALPHA = 0.7;
double peakPowerForChannel = pow(10, (0.05 * [recorder averagePowerForChannel:0]));
lowPassResults = ALPHA * peakPowerForChannel + (1.0 - ALPHA) * lowPassResults;
return [recorder averagePowerForChannel:0];
//return lowPassResults;
//NSLog(@"Average input: %f Peak input: %f Low pass results: %f", [recorder averagePowerForChannel:0], [recorder peakPowerForChannel:0], lowPassResults);
}
- (Float32)peakPower {
[recorder updateMeters];
const double ALPHA = 0.7;
double peakPowerForChannel = pow(10, (0.05 * [recorder peakPowerForChannel:0]));
lowPassResults = ALPHA * peakPowerForChannel + (1.0 - ALPHA) * lowPassResults;
return [recorder peakPowerForChannel:0];
//return lowPassResults;
//NSLog(@"Average input: %f Peak input: %f Low pass results: %f", [recorder averagePowerForChannel:0], [recorder peakPowerForChannel:0], lowPassResults);
}
#pragma mark -
#pragma mark Singleton Pattern
+ (id)allocWithZone:(NSZone *)zone {
@synchronized(self) {
if (sharedListener == nil) {
sharedListener = [super allocWithZone:zone];
return sharedListener;
}
}
return nil;
}
- (id)copyWithZone:(NSZone *)zone {
return self;
}
- (id)init {
if ([super init] == nil)
return nil;
return self;
}
- (id)retain {
return self;
}
- (unsigned)retainCount {
return UINT_MAX;
}
//- (void)release {
// Do nothing.
//}
- (id)autorelease {
return self;
}
@end
Мой вопрос: куда мне нужно поместить этот код, который вы опубликовали, о решении этой проблемы. , , Как я могу решить эту проблему?