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 K-L
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Re: SRec ZMBV codec w. altivec support - please test
Posted on 13-Nov-2009 22:33:19
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Super Member
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Joined: 3-Mar-2006
Posts: 1411
From: Oullins, France | | |
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| @salass00
Too bad because with the Altivec version the CPU is at 55% max and without it goes up as far as 85%  _________________
PowerMac G5 2,7Ghz - 2GB - Radeon 9650 - MorphOS 3.14
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salass00
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Re: SRec ZMBV codec w. altivec support - please test
Posted on 14-Nov-2009 7:56:01
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Elite Member
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Joined: 31-Oct-2003
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From: Finland | | |
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K-L
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Re: SRec ZMBV codec w. altivec support - please test
Posted on 14-Nov-2009 9:11:26
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Super Member
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Joined: 3-Mar-2006
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From: Oullins, France | | |
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| @salass00
Yes, it works but it's really slow since it uses nearly 100% CPU when recording I would also say that the "older" non Altivec is faster than the one I'v just tested now. _________________
PowerMac G5 2,7Ghz - 2GB - Radeon 9650 - MorphOS 3.14
AmigaONE X1000, 2GB, Sapphire Radeon HD 7700
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salass00
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Re: SRec ZMBV codec w. altivec support - please test
Posted on 14-Nov-2009 9:32:54
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Elite Member
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Joined: 31-Oct-2003
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From: Finland | | |
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| @K-L
Well at least that confirmed my earlier suspicion.
I did a search for "zlib altivec" and found this BTW:
http://www.freevec.org/old/whitepapers/Adler32-Altivec.pdf
So maybe there might still be some use for altivec optimisations. The adler32 function is used by zlib both for compression (deflate) and decompression (inflate) so maybe it will provide at least a small increase in speed. |
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salass00
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Re: SRec ZMBV codec w. altivec support - please test
Posted on 14-Nov-2009 10:14:28
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K-L
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Re: SRec ZMBV codec w. altivec support - please test
Posted on 14-Nov-2009 11:44:17
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Super Member
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Joined: 3-Mar-2006
Posts: 1411
From: Oullins, France | | |
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| @salass00
It's working but still uses 90 to 95 % CPU. Are the Altivec optimizations activated ? i'm recording a 640x480 screen.
Nontheless it can still produce some "watchable" videos  Last edited by K-L on 14-Nov-2009 at 11:45 AM.
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PowerMac G5 2,7Ghz - 2GB - Radeon 9650 - MorphOS 3.14
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salass00
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Re: SRec ZMBV codec w. altivec support - please test
Posted on 14-Nov-2009 12:52:21
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Elite Member
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Joined: 31-Oct-2003
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| @K-L
So it actually made it slower? I guess I'll have to give up trying to make it faster this way then.
Quote:
Are the Altivec optimizations activated ?
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Yes, I disabled the other altivec stuff.Last edited by salass00 on 14-Nov-2009 at 12:54 PM.
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K-L
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Re: SRec ZMBV codec w. altivec support - please test
Posted on 14-Nov-2009 13:10:47
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Super Member
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Joined: 3-Mar-2006
Posts: 1411
From: Oullins, France | | |
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| @salass00
Indeed, it made it slower, weird too bad you haven't got a G4 to test it by your own. _________________
PowerMac G5 2,7Ghz - 2GB - Radeon 9650 - MorphOS 3.14
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