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Re: [OT] Don't draw every 10th sample(!) (Was Re: Best drawing technology for audio waveforms, envelopes, etc.?)

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Re: [OT] Don't draw every 10th sample(!) (Was Re: Best drawing technology for audio waveforms, envelopes, etc.?)

Subject: Re: [OT] Don't draw every 10th sample(!) (Was Re: Best drawing technology for audio waveforms, envelopes, etc.?)
From: "R. Matthew Emerson" <email@hidden>
Date: Tue, 26 Jun 2007 20:29:06 -0400

On Jun 25, 2007, at 2:45 PM, Hans Kuder wrote:

One other thought - rather than drawing one or a few paths horizontally through each (on-screen) sample, what if I drew each (on-screen) sample as its own vertical line with height equal to amplitude? This would essentially be trading one complex path for hundreds of very simple paths. Can anyone comment on the performance advantages or disadvantages of this?

Perhaps CGContextStrokeLineSegements() might be convenient in this circumstance.

I remember learning about that function at a WWDC. See http:// developer.apple.com/samplecode/QuartzLines/

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Re: [OT] Don't draw every 10th sample(!) (Was Re: Best drawing	technology for audio waveforms, envelopes, etc.?)
From: "Hans Kuder" <email@hidden>


References:  
  >Best drawing technology for audio waveforms, envelopes, etc.? (From: "Hans Kuder" <email@hidden>)
  >Re: Best drawing technology for audio waveforms, envelopes, etc.? (From: Alastair Houghton <email@hidden>)
  >Re: Best drawing technology for audio waveforms, envelopes, etc.? (From: "Hans Kuder" <email@hidden>)
  >Re: Best drawing technology for audio waveforms, envelopes, etc.? (From: "I. Savant" <email@hidden>)
  >[OT] Don't draw every 10th sample(!) (Was Re: Best drawing	technology for audio waveforms, envelopes, etc.?) (From: Alastair Houghton <email@hidden>)
  >Re: [OT] Don't draw every 10th sample(!) (Was Re: Best drawing	technology for audio waveforms, envelopes, etc.?) (From: "Hans Kuder" <email@hidden>)




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