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12 commits

Author SHA1 Message Date
Steve Bavin
fb2380790e FS#8894 - Add time stretching feature to all SWCODEC targets - the current algorithm is best for spoken word. 
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@21258 a1c6a512-1295-4272-9138-f99709370657
 2009-06-12 07:20:50 +00:00
Daniel Stenberg
2acc0ac542 Updated our source code header to explicitly mention that we are GPL v2 or 
later. We still need to hunt down snippets used that are not. 1324 modified
files...
http://www.rockbox.org/mail/archive/rockbox-dev-archive-2008-06/0060.shtml


git-svn-id: svn://svn.rockbox.org/rockbox/trunk@17847 a1c6a512-1295-4272-9138-f99709370657
 2008-06-28 18:10:04 +00:00
Andree Buschmann
fd052ec753 Commit FS#8750. Add ARM assembler for the dsp-functions channels_process_sound_chan_mono(), channels_process_sound_chan_karaoke(), sample_output_mono() and sample_output_stereo(). By measurement the speed up is ~75% for the first three functions and ~40% for sample_output_stereo(). Additionally avoid calling yield() to often in dsp.c -- it is now limited to once per tick. 
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@16717 a1c6a512-1295-4272-9138-f99709370657
 2008-03-19 13:55:53 +00:00
Dave Chapman
f02cba8096 Code cleaning - remove some unnecessary defined(SIMULATOR) checks 
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@13369 a1c6a512-1295-4272-9138-f99709370657
 2007-05-10 13:16:08 +00:00
Michael Sevakis
369c2a37b7 SWCODEC & Coldfire: Do some more DSP straigntening out. Do as much Coldfire optimizing as seems reasonably possible by jumping through some hoops to avoid stalls. Further boost reduction will just be fractional points if taken to extremes-- not worth it. Wrap up the ASM for awhile. 
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@12905 a1c6a512-1295-4272-9138-f99709370657
 2007-03-25 04:03:44 +00:00
Thom Johansen
1b05ea8ffe ARM assembler for resampling. Should provide some gains, though not huge ones. 
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@12732 a1c6a512-1295-4272-9138-f99709370657
 2007-03-11 23:33:58 +00:00
Thom Johansen
9636c1b61e Adapt ARM crossfeed assembler to work like the Coldfire one. Remove SWITCHPARAM cruft as it's no longer needed. 
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@12507 a1c6a512-1295-4272-9138-f99709370657
 2007-02-27 17:33:23 +00:00
Michael Sevakis
6fbdb912b0 SWCODEC: Tighten up coldfire assembly a little bit more. Cleanup to make differing parameters between ARM and Coldfire halfway clean. Hopefully those differences can be reconciled soon. A tiny bit of C optimizing for karaoke channel mode. 
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@12505 a1c6a512-1295-4272-9138-f99709370657
 2007-02-27 14:25:36 +00:00
Michael Sevakis
d4e904bf35 SWCODEC: Dsp speed optimizations. Changes for more modularity. Removal of some usless stuff. Some assembly routines for Coldfire with speed in mind over size for the outputs but the channel modes remain compact. Miscellaneous coldfire asm updates to accomodate the changes. Codec API structure version has to increase so do a full update. 
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@12472 a1c6a512-1295-4272-9138-f99709370657
 2007-02-24 17:06:36 +00:00
Michael Sevakis
36175ac945 SWCODEC: DSP optimizations for conversion to internal format and resampling. Assembly resampling for Coldfire. Word has it ARM will get that soon. 
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@12399 a1c6a512-1295-4272-9138-f99709370657
 2007-02-19 02:49:26 +00:00
Thom Johansen
56f2ca74ad Assembler optimised crossfeed routine for ARM. Performance improvement is more than double. Should work fine, but watch your ears nevertheless. 
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@10608 a1c6a512-1295-4272-9138-f99709370657
 2006-08-16 12:38:49 +00:00
Thom Johansen
cc94ae45a7 Keep assembler versions of DSP routines in dsp_arch.S files. This also 
solves the annoying register allocator problem when not using
-fomit-frame-pointer for the Coldfire assembler optimised crossfeed
routine.


git-svn-id: svn://svn.rockbox.org/rockbox/trunk@9215 a1c6a512-1295-4272-9138-f99709370657
 2006-03-23 19:59:52 +00:00