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This is a note to announce the availability of "Ogg Theorarm", an optimised ARM implementation of decoding libraries for the Theora video code, and Vorbis audio codec from xiph.org. Full details of this code release can be found at <http://www.wss.co.uk/pinknoise/theorarm>, but highlights include: * Full speed playback of a 320x240x25fps clip with a 48kHz stereo audio track on an 416Mhz Xscale based wince device. (39fps if audio sync is sacrificed). * With post processing (deblocking/deringing) enabled, this drops to 23fps. * Uses no hardware accel...

On Sun, 17 Sep 2006, [UTF-8] Rafael Esp?ndola wrote: > The ARM has a multiply instruction of the form Rd=Rm*Rs where Rd != Rm. > How can I add this requirement to the instruction definition? Unfortunately there is currently no great way to do this. Some options are: 1. Pin one operand to a specific register, one that isn't allocated (e.g. R12). Use copyto/fromreg to get to it.

The ARM has a multiply instruction of the form Rd=Rm*Rs where Rd != Rm. How can I add this requirement to the instruction definition? Thanks, Rafael

...ill be on phones like the Nokia 5800) they will appear in the middle of the screen. I'll try to get scaling put back in when I can get the performance good enough. I was going to ask if anyone had done any optimisation for ARM processors, but I've now spotted this project: http://wss.co.uk/pinknoise/theorarm So I'm going to take a look at that and see if I can get another optimised version out soon! Release notes: Only 4:2:0 encoded files with vorbis are supported. i.e. videos must have a vorbis audio stream (theora only won't play). Videos need to go on the memory card in a folder...

...le to > capture this sort of thing, but I'm not very familiar with ARM. What > specific instructions are problematic? MUL looks ok in my copy of the > ARM ARM. MUL (and MLA, MuLtiply and Accumulate) are the two well known ones. The very unofficial, but historically good, http://www.pinknoise.demon.co.uk/ARMinstrs/ARMinstrs.html#Multiplication says "The destination register shall not be the same as the operand register Rm. R15 shall not be used as an operand or as the destination register." Then there's the long multiplication instruction on some ARM architec...

Hi, This patch improves compression a very tiny bit on average, but up to 0.1 percentage point for classical music. I haven't found any tracks that show worsening compression with this patch. -------------- next part -------------- A non-text attachment was scrubbed... Name: 0001-Improve-LPC-order-guess.patch Type: text/x-patch Size: 0 bytes Desc: not available Url :

---------- Forwarded message ---------- From: David Gerard <dgerard at gmail.com> Date: Fri, Feb 5, 2010 at 21:47 Subject: [whatwg] Suddenly, ~40% of IE users get HTML5 Theora with no effort To: WHATWG <whatwg at whatwg.org> http://www.atoker.com/blog/2010/02/04/html5-theora-video-codec-for-silverlight/