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<br><br>> Date: Sun, 14 Mar 2010 15:12:42 -0500<br>> Subject: Re: [Tremor] LOW_ACCURACY mode and MDCT improvements<br>> From: xiphmont@xiph.org<br>> To: giac2000@hotmail.com<br>> CC: tremor@xiph.org<br>> <br>> > The speed up comes mainly from using a split radix fft that significantly<br>> > reduces the number of add/mul operations required. Additionally, we have<br>> > provided some ASM segments to improve performance further. However, even<br>> > without ASM, we are still significantly faster then stock Tremor.<br>> <br>> Yay, this is all fully believable.<br>> <br>> > We have licensed it under BSD and would like to see it used in libtremor.<br>> <br>> Sweet, I expect so would we.<br><div><div><br></div><div><br></div><div><br></div><div>http://duke.edu/~mgg6/rockbox/tremor_ffmpeg_imdctv5a.patch</div><div><br></div><div><br></div><div><br></div><div>This patch compiles cleanly and produces correct output for me on x86-64 and</div><div><br></div><div>arm running in QEMU. I've removed all int32_t and fixed32 types. </div><div><br></div><div><br></div><div><br></div><div><br></div><div>The only problem I can see is occasionally needing to do a make clean after</div><div><br></div><div>building due to some depencency issue in the make script.</div><div><br></div><div><br></div><div><br></div><div><br></div><div>I think it can be reviewed now.</div><div><br></div><div><br></div><div><br></div><div>Mike</div><div><br></div><div><br></div></div> <br /><hr />Hotmail has tools for the New Busy. Search, chat and e-mail from your inbox. <a href='http://www.windowslive.com/campaign/thenewbusy?ocid=PID27925::T:WLMTAGL:ON:WL:en-US:WM_HMP:032010_1' target='_new'>Learn More.</a></body>
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