Re: jpg to bmp from FrameCallbackProc without fileio

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#330

From: Peter Fagerbrant
Date: Wed, 19 Jan 2005 12:14

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"Hans Galema" <notused@notused.nl> skrev i meddelandet 
news:41ee43e8$1@newsgroups.borland.com...
>How many frmes can you handle
> in a second if you omit the 'I Use this for storing the bitmapinfo in a 
> array:'
> completely. So just offer an empty array to the next routine.
> Keep the rest the same.
>
> I like to know the percentage of time that conversion takes.
>
> Hans.

Without the for( int y=0;y<CAMRESY;y++) {...}
It runs with 26-30 fps.

When I comment out the for(  int x=0;x<CAMRESX;x++)
but keeps y loop including BYTE* pLine = (BYTE*) 
((THackJPEGImage*)JPEGImage)->Bitmap->ScanLine[y];
It drops to 15fps.

When I commenting out the "JPEGImage)->Bitmap->ScanLine[y];"
Enabling the x loop but only do:
for(  int x=0;x<CAMRESX;x++)
   {
   int r = 11; //pLine[ xoffsIn  + 0];
   int g = 11; //pLine[ xoffsIn  + 1];
   int b = 11; //pLine[ xoffsIn  + 2];

   int iGrey = b*0.11 + g*0.59 + r*0.30;
   pData8Out[ x + yoffsOut ] = iGrey;
   xoffsIn += 3;
   }
It runs on 22-26 fps

It looks like the ScanLine[y]; is the big thief here.

reg/
PFa

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Subject: Re: jpg to bmp from FrameCallbackProc without fileio
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