Jens Arnold
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a29b659758
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Assembler optimised mono predictor for ARM. Speedup for -c1000 mono is ~5% on PP, ~8% on Gigabeat S (less for higher compression levels). Also fix some overlooked comments in the stereo predictor.
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@19375 a1c6a512-1295-4272-9138-f99709370657
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2008-12-09 23:20:59 +00:00 |
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Jens Arnold
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c1cd0469ca
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Implement mono predictor in assembler for coldfire, yielding a ~6% speedup for mono -c1000. Apply ideas gained from it back to the stereo predictor, saving 4 instructions. No speed increase for stereo, probably due to cache aliasing effects. * 80-column police.
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@19296 a1c6a512-1295-4272-9138-f99709370657
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2008-12-02 02:26:04 +00:00 |
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Jens Arnold
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5b0d74a7d3
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Get rid of unused return values, except the one from decode_chunk() which will be used in the dual core split.
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@19236 a1c6a512-1295-4272-9138-f99709370657
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2008-11-26 18:01:18 +00:00 |
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Jens Arnold
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3761c0108c
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Branch optimisation in both C (giving hints to gcc - verified using -fprofile-arcs and gcov) and asm files. Biggest effect on coldfire (-c1000: +8%, -c2000: +5%), but ARM also profits a bit (less than 1% on ARM7TDMI, around 1% on ARM1136).
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@19199 a1c6a512-1295-4272-9138-f99709370657
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2008-11-24 18:40:49 +00:00 |
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Jens Arnold
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1b14167861
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Centralise compile-time configuration.
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@19121 a1c6a512-1295-4272-9138-f99709370657
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2008-11-16 17:49:37 +00:00 |
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Jens Arnold
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d1b19be423
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Various speedups: (1) Put actual decoding functions into IRAM on PP5002. (2) Put the insane filter buffer into IRAM on coldfire and PP502x (just for completeness, as long as there's no better use). (3) Use the ARMv6 'ssat' instruction for saturation on Gigabeat S.
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@18701 a1c6a512-1295-4272-9138-f99709370657
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2008-10-03 21:40:32 +00:00 |
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Jens Arnold
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5d066590cc
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APE codec: Assembler optimised predictor for coldfire. Heavily based on the arm version atm, instruction reordering will probably allow for a bit more speedup soon. Speedup: -c1000: 177% -> 210%, -c2000: 135% -> 147%, -c3000: 97% -> 103%.
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@15211 a1c6a512-1295-4272-9138-f99709370657
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2007-10-19 21:35:07 +00:00 |
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Dave Chapman
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cee61b57c8
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Remove some unused code
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@13630 a1c6a512-1295-4272-9138-f99709370657
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2007-06-14 22:35:01 +00:00 |
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Dave Chapman
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6b713820c1
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ARM assembler predictor decoding function. This increases my -c1000 test track from around 94% realtime on an ipod to around 104% realtime, but yields only a tiny speedup (453% to 455%) on the Gigabeat. Including this optimisation, total decoding time for my 245.70s -c1000 test track on an ipod is 236.06s, with the predictor decoding taking 51.40s of that time - meaning the predictor decoding is only about 22% of the total decoding time.
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@13626 a1c6a512-1295-4272-9138-f99709370657
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2007-06-13 22:02:34 +00:00 |
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Dave Chapman
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601ede7f9c
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C optimisations to the predictor decoding - create a single function for decoding stereo streams, and reorganise to minimise the number of variables used. My -c1000 test track now decodes at 93% realtime on PortalPlayer (was 78%), 187% on Coldfire (was 170%) and 447% on Gigabeat (was 408%).
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@13608 a1c6a512-1295-4272-9138-f99709370657
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2007-06-10 08:55:16 +00:00 |
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Dave Chapman
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7b1d90a851
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Seeking and resume support for Monkey's Audio
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@13597 a1c6a512-1295-4272-9138-f99709370657
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2007-06-08 22:35:26 +00:00 |
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Dave Chapman
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520274219a
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Initial commit of Monkey's Audio (.ape/.mac) support. Note that Monkey's is an extremely CPU-intensive codec, and that the decoding speed is directly related to the compression level (-c1000, -c2000, -c3000, -c4000 or -c5000) used when encoding the file. Current performance is: -c1000 to -c3000 are realtime on a Gigabeat, -c1000 is realtime on Coldfire targets (H100, H300 and Cowon), and nothing is realtime on PortalPlayer targets (iPods, H10, Sansa). Hopefully this can be improved. More information at FS #7256.
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@13562 a1c6a512-1295-4272-9138-f99709370657
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2007-06-05 16:58:29 +00:00 |
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