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Software News   Software News : WarpJPEG.datatype 45.12 - now with AltiVec speed boost
   posted by Futaura on 15-May-2015 14:25:45 (2135 reads)
A new faster version of WarpJPEG and associated WarpDTPrefs has been released, bringing AltiVec speed optimisations to AmigaOS 4.x and MorphOS users, making JPEG decoding at least 1.5x faster than before, along with several other improvements for WarpOS and AmigaOS 3.x also. You may be aware that I originally wrote the jpeg.datatype supplied with AmigaOS 4.x, but now WarpJPEG outperforms it by some considerable margin.

Full list of changes:

* Added AltiVec speed optimizations for the OS4 and MorphOS versions
making decoding speed of baseline images 1.5x faster on a G4 and
1.9x faster on a PA6T, with fancy upsampling off, on average.
With fancy upsampling on, the AltiVec speed gain is even greater -
1.9x faster on a G4 and 2.3x faster on a PA6T. These optimizations
can be toggled off/on using the new USE_ALTIVEC setting.

* Huffman decoder in PowerPC versions is now 5-10% faster.

* Reintegrated higher quality fancy upsampling smoothing feature from
IJG jpeglib v6b which had not been present since WarpJPEG 45.5 due
to its removal from IJG jpeglib v7 and higher.

* MorphOS and WarpOS versions recompiled with VBCC 0.9d.

* Added new set of benchmarks for OS4 (benchmark updates for other
platforms suspended until my A1200 motherboard has been repaired).
    

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pavlor 
Re: WarpJPEG.datatype 45.12 - now with AltiVec speed boost
Posted on 15-May-2015 20:00:08
#1 ]
Elite Member
Joined: 10-Jul-2005
Posts: 9081
From: Unknown

Nice!

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Phantom 
Re: WarpJPEG.datatype 45.12 - now with AltiVec speed boost
Posted on 15-May-2015 20:33:32
#2 ]
Elite Member
Joined: 2-Aug-2007
Posts: 2047
From: Unknown

Thanks for the update.


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zzd10h 
Re: WarpJPEG.datatype 45.12 - now with AltiVec speed boost
Posted on 15-May-2015 22:38:49
#3 ]
Amiga Developer Team
Joined: 21-May-2012
Posts: 1073
From: France

Thank you Futaura !


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Rob 
Re: WarpJPEG.datatype 45.12 - now with AltiVec speed boost
Posted on 15-May-2015 22:45:26
#4 ]
Elite Member
Joined: 20-Mar-2003
Posts: 5849
From: S.Wales

Thanks for the update. Just downloaded.

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Tuxedo 
Re: WarpJPEG.datatype 45.12 - now with AltiVec speed boost
Posted on 16-May-2015 8:44:14
#5 ]
Elite Member
Joined: 28-Nov-2003
Posts: 2323
From: Perugia, ITALY

Great!
Now Loview image loading times was comparable to mos side on my peg2 the only.remaining problem.now was that from loading to display on os4 theres still some weird delay...

Great work!


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Simone"Tuxedo"Monsignori, Perugia, ITALY.

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Massi 
Re: WarpJPEG.datatype 45.12 - now with AltiVec speed boost
Posted on 16-May-2015 12:42:52
#6 ]
Cult Member
Joined: 2-Feb-2011
Posts: 516
From: Rome, Italy

@Futaura

Thanks for this cool work, will try it asap.


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SAM440EP-FLEX @ 733 Mhz, AmigaOS 4.1 Update 1

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newlight 
Re: WarpJPEG.datatype 45.12 - now with AltiVec speed boost
Posted on 16-May-2015 13:30:00
#7 ]
Super Member
Joined: 10-Sep-2007
Posts: 1723
From: Somewhere in Spain

Congratulations!!!

Last edited by newlight on 16-May-2015 at 01:31 PM.
Last edited by newlight on 16-May-2015 at 01:30 PM.


_________________
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Amiga 1200 Tower on AmigaKit since years
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Futaura 
Re: WarpJPEG.datatype 45.12 - now with AltiVec speed boost
Posted on 16-May-2015 14:15:26
#8 ]
Regular Member
Joined: 10-May-2004
Posts: 228
From: UK

@Tuxedo

Quote:
Now Loview image loading times was comparable to mos side on my peg2 the only.remaining problem.now was that from loading to display on os4 theres still some weird delay...

I can't be sure, but it is probably down to differences in the way picture.datatype works on MOS and OS4. On OS4, it keeps the original chunky data, unscaled and not remapped, in a large pixel buffer - when it comes to display it, it then copies this data into the target bitmap. I think MOS doesn't keep the original image data and puts the image directly into a bitmap possibly, so no need to copy it across (used to be the case with the CGX picture.datatype on OS3.x at least). Each approach has its advantages and disadvantages.

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Tuxedo 
Re: WarpJPEG.datatype 45.12 - now with AltiVec speed boost
Posted on 16-May-2015 15:53:07
#9 ]
Elite Member
Joined: 28-Nov-2003
Posts: 2323
From: Perugia, ITALY

@Futaura

I see...however now things goes faster :)

Good job!


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Simone"Tuxedo"Monsignori, Perugia, ITALY.

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Templario 
Re: WarpJPEG.datatype 45.12 - now with AltiVec speed boost
Posted on 16-May-2015 16:36:16
#10 ]
Elite Member
Joined: 22-Jun-2004
Posts: 3477
From: Palencia city of the emptied Spain.

Thanks for the update Oliver!


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Sam440ep 800 MHZ + OS 4.1 F.E.
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MacMini 1.5 GHz + MorphOS 3.13
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BillE 
Re: WarpJPEG.datatype 45.12 - now with AltiVec speed boost
Posted on 17-May-2015 8:20:35
#11 ]
Super Member
Joined: 14-Nov-2003
Posts: 1168
From: Northern Scotland

Just ordered.

Thanks for supporting the Amiga.

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Massi 
Re: WarpJPEG.datatype 45.12 - now with AltiVec speed boost
Posted on 17-May-2015 12:29:05
#12 ]
Cult Member
Joined: 2-Feb-2011
Posts: 516
From: Rome, Italy

@Futaura

Haven' t downloaded it yet, how to order?


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Kicko 
Re: WarpJPEG.datatype 45.12 - now with AltiVec speed boost
Posted on 17-May-2015 19:02:01
#13 ]
Elite Member
Joined: 19-Jun-2004
Posts: 5009
From: Sweden

Thanks for the update :)

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