Michael Giacomelli
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0a1baa36b1
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Fix FS#10174 by correcting an oversimplification of the AAC window switching code I introduced with the unified IMDCT library. Should significantly improve accuracy for all AAC files.
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@20821 a1c6a512-1295-4272-9138-f99709370657
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2009-04-29 17:44:02 +00:00 |
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Michael Giacomelli
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46f85c4c54
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Combine the Vorbis, WMA and AAC IMDCT functions and put them into the codeclib. Combined IMDCT is now based on existing Tremor transform. Reduces CPU for 192k AAC by 21MHz on Coldfire, and 5MHz on PP5024. WMA and Vorbis should have no functional changes since they already used this code. Further optimization is possible and would benefit all 3 codecs.
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@18412 a1c6a512-1295-4272-9138-f99709370657
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2008-09-04 18:02:10 +00:00 |
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Michael Giacomelli
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54903eb7fa
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Use WMA windowing optimizations for AAC. Saves about 3.5MHz on Coldfire, and about 2 MHz on ARM. Thanks to amiconn for help with Coldfire ASM improvements. Next step: dump faad IMDCT.
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@18238 a1c6a512-1295-4272-9138-f99709370657
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2008-08-10 20:19:38 +00:00 |
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Michael Giacomelli
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b9eb18260f
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Too much on the last commit.
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@18085 a1c6a512-1295-4272-9138-f99709370657
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2008-07-17 18:36:47 +00:00 |
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Michael Giacomelli
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1334738071
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Use Tremor IMDCT for WMA. Gives a ~20% speedup on ARM and coldfire. All my test samples gave equivilent or better accuracy (>>16 bit), but there may still be problems. Code becomes somewhat less readable since the IMDCT has bits of Vorbis in it, but this is not a serious issue and the old ffmpeg transform remains in SVN if anyone wants it. Also, WMA now passes Vorbis as the fastest transform codec on ARM, although MPC remains the fastest lossy codec overall.
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@18084 a1c6a512-1295-4272-9138-f99709370657
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2008-07-17 17:43:49 +00:00 |
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Magnus Holmgren
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3fa5e5f592
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Apply a bunch of simple AAC decoder optimizations. Biggest speedup is on ColdFire targets, but ARM targets benefits too. Allows realtime playback of some AAC files on Iriver targets (H1x0, H3x0). Remove support for some rarely used AAC profiles to reduce code size a bit.
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@11038 a1c6a512-1295-4272-9138-f99709370657
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2006-09-24 19:00:29 +00:00 |
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Dave Chapman
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798a4f3533
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Changes to make libfaad compile in Rockbox. Also remove compiler warnings, use some IRAM (IRAM usage needs reviewing) and drastically reduce the stack usage
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@7700 a1c6a512-1295-4272-9138-f99709370657
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2005-10-31 20:33:27 +00:00 |
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Dave Chapman
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65de1cc6af
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Initial check-in of unmodified libfaad (part of the FAAD2 project). This is the last version of libfaad available under the GPL - the state of FAAD2 CVS at midnight on 2005-02-01
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@7699 a1c6a512-1295-4272-9138-f99709370657
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2005-10-31 18:56:29 +00:00 |
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