[Speex-dev] Decoder performance on Windows Mobile 5

[Bjoern Rasmussen]

Hi
On WindowsCE you should enable the FIXED_POINT flag. Floating point operations are too slow on ARM processors.
-- Bjoern

From: steven.harris at essential-viewing.com
To: speex-dev at xiph.org
Date: Fri, 9 Oct 2009 10:13:05 +0100
Subject: [Speex-dev] Decoder performance on Windows Mobile 5
















Hello,

 

I’m trying to use the speex decoder on Windows Mobile
5. I have compiled the debug version of the lib for WM5 PPC. I am running this
test on an HTC TyTn phone.

 

I’m decoding 4Kbits narrowband speex audio. Each
decode call takes a buffer of size 100 bytes.

 

The problem is that each decode call takes around 130ms to
complete. This is too slow for the audio to play back if I stream the decoded
audio to the WaveOut audio device.

 

If I run the same test on my desktop PC with the win32
compiled version of libspeex using SSE support then the decode takes less than
1ms.

 

Is there anything I can do to speed up the decode on Windows
Mobile 5?

 

Thanks,

Steven

 

 

 		 	   		  
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