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2014/10/15 ¤U¤È 10:09:25
iphone Programming Glossary: fsDetermining the magnitude of a certain frequency on the iPhone http://stackoverflow.com/questions/2921674/determining-the-magnitude-of-a-certain-frequency-on-the-iphone things Sampling frequency for example 44100 Hz for CD Audio FFT size Real frequencies are mapped to k as follows F k Fs N for k 0 ... N 2 1 N 1 2 for odd N or k F N Fs for F 0Hz ... Fs 2 Fs N where F is the frequency in Hz N is the FFT size.. for CD Audio FFT size Real frequencies are mapped to k as follows F k Fs N for k 0 ... N 2 1 N 1 2 for odd N or k F N Fs for F 0Hz ... Fs 2 Fs N where F is the frequency in Hz N is the FFT size and Fs is the sampling frequency Hz . Some things.. size Real frequencies are mapped to k as follows F k Fs N for k 0 ... N 2 1 N 1 2 for odd N or k F N Fs for F 0Hz ... Fs 2 Fs N where F is the frequency in Hz N is the FFT size and Fs is the sampling frequency Hz . Some things to note k is an..
iPhone FFT with Accelerate framework vDSP http://stackoverflow.com/questions/6358764/iphone-fft-with-accelerate-framework-vdsp of the bin or bins see 2 that correspond to your frequency or frequencies of interest. If your sample rate is Fs and your FFT size is N then the corresponding frequency for output bin i is given by f i Fs N . Conversely if you are interested.. If your sample rate is Fs and your FFT size is N then the corresponding frequency for output bin i is given by f i Fs N . Conversely if you are interested in a specific frequency f then the bin of interest i is given by i N f Fs . Additional.. by f i Fs N . Conversely if you are interested in a specific frequency f then the bin of interest i is given by i N f Fs . Additional note you will need to apply a suitable window function e.g. Hann aka Hanning to your FFT input data prior to..
http://stackoverflow.com/questions/8064879/iad-not-working link Problem is on out put only view is visible in the simulator nothing else. http www.youtube.com watch v VsNGDuJ6 Fs Code is as follows in .h #import UIKit UIKit.h #import iAd iAd.h @interface RootViewController UIViewController ADBannerViewDelegate..
Attempting to deploy my app on my jailbroken iphone, but the app closes immediately! http://stackoverflow.com/questions/1285980/attempting-to-deploy-my-app-on-my-jailbroken-iphone-but-the-app-closes-immediat drag the newly compiled app to somewhere that is easy to get to from the terminal. In a terminal run 'codesign fs Cydia Developer path appname.app appname' Somehow get your app to the phone ssh cydia teleportation whatever and viola Working..
EXC_BAD_ACCESS (SIGSEGV) crash http://stackoverflow.com/questions/1733317/exc-bad-access-sigsegv-crash ebp 0xbfffea28 esp 0xbfffe8a8 ss 0x0000001f efl 0x00010206 eip 0x910e0688 cs 0x00000017 ds 0x0000001f es 0x0000001f fs 0x00000000 gs 0x00000037 cr2 0xc0000023 iphone share improve this question Enable NSZombie it will tell you which de..
CMMotionManager and the Gyroscope on iPhone 4 http://stackoverflow.com/questions/3229311/cmmotionmanager-and-the-gyroscope-on-iphone-4
How to split long NSString into pages http://stackoverflow.com/questions/3812692/how-to-split-long-nsstring-into-pages string CFDictionaryRef NSDictionary dictionaryWithObjectsAndKeys id fnt kCTFontAttributeName nil CTFramesetterRef fs CTFramesetterCreateWithAttributedString str CFRange r 0 0 CFRange res 0 0 NSInteger str_len string length do CTFramesetterSuggestFrameSizeWithConstraints.. str CFRange r 0 0 CFRange res 0 0 NSInteger str_len string length do CTFramesetterSuggestFrameSizeWithConstraints fs r NULL size res r.location res.length result addObject NSNumber numberWithInt res.length while r.location str_len NSLog.. res.length result addObject NSNumber numberWithInt res.length while r.location str_len NSLog @ @ result CFRelease fs CFRelease str CFRelease fnt return result IMPORTANT NOTE You can not use the returned range or size with any UIKit classes..
Embed video from youtube.com into iphone app http://stackoverflow.com/questions/5144416/embed-video-from-youtube-com-into-iphone-app with basic html markup and i'm placing there this code. embed id yt src http www.youtube.com watch v L9szn1QQfas fs 0 type application x shockwave flash width width height height embed The problem is the video always opens in the fullscreen.. setAllowsInlineMediaPlayback YES webView loadHTMLString @ embed id yt src http www.youtube.com watch v L9szn1QQfas fs 0 type application x shockwave flash width 300 height 300 embed baseURL nil I ran the same exact code on both an iPhone..
Can anybody help me in recording iPhone output sound through Audio Unit http://stackoverflow.com/questions/8615358/can-anybody-help-me-in-recording-iphone-output-sound-through-audio-unit UInt32 inNumberFrames AudioBufferList ioData double timeInSeconds inTimeStamp mSampleTime kSampleRate printf n fs inBusNumber lu inNumberFrames lu timeInSeconds inBusNumber inNumberFrames printAudioUnitRenderActionFlags ioActionFlags..
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