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| author | Mohamed Tarek <mt@rockbox.org> | 2010-07-05 22:33:37 +0000 |
|---|---|---|
| committer | Mohamed Tarek <mt@rockbox.org> | 2010-07-05 22:33:37 +0000 |
| commit | d884af2b9992f12e98a3e8548aff76b232b5bfb3 (patch) | |
| tree | d3aefbc2195382025105b252c16b00087778beed /apps/codecs/libwmapro/README.rockbox | |
| parent | 6a04479d63dd4d7dfc54849e4c925d360d55fa9c (diff) | |
| download | rockbox-d884af2b9992f12e98a3e8548aff76b232b5bfb3.zip rockbox-d884af2b9992f12e98a3e8548aff76b232b5bfb3.tar.gz rockbox-d884af2b9992f12e98a3e8548aff76b232b5bfb3.tar.bz2 rockbox-d884af2b9992f12e98a3e8548aff76b232b5bfb3.tar.xz | |
Partial conversion of the wmapro decoder to fixed point arithmetic. Currently inverse quantization & rescaling,
imdct and windowing are all in fixed point.
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@27302 a1c6a512-1295-4272-9138-f99709370657
Diffstat (limited to 'apps/codecs/libwmapro/README.rockbox')
| -rw-r--r-- | apps/codecs/libwmapro/README.rockbox | 14 |
1 files changed, 12 insertions, 2 deletions
diff --git a/apps/codecs/libwmapro/README.rockbox b/apps/codecs/libwmapro/README.rockbox index 09c54b4..9bd737a 100644 --- a/apps/codecs/libwmapro/README.rockbox +++ b/apps/codecs/libwmapro/README.rockbox @@ -14,8 +14,18 @@ IMPORT DETAILS Based on ffmpeg svn r22886 dated 15 April 2010. -Currently, the files contain minimal changes from their original state in order -to be able to compile cleanly. +The code is slowly being modified to convert it from floating point maths to +fixed point. + +As of 6 July 2010, the following steps are all working properly in fixed point: +- Inverse quantization and rescaling +- IMDCT +- Windowing + +Results of comparing output wav files from the partially fixed point decoder to +the output wav files of ffmpeg decoder are : +- average relative error = 0.016% +- maximum relative error = 0.3% COMPILING |