rockbox

History

Andree Buschmann 609c526d56 Use more IRAM on S5L870x to speed up wmapro by ~2%. git-svn-id: svn://svn.rockbox.org/rockbox/trunk@29906 a1c6a512-1295-4272-9138-f99709370657		2011-05-20 23:28:09 +00:00
..
libwmapro.make	Switch coldfire builds over to new toolchain using gcc 4.5.2 and binutils 2.20.1	2011-01-12 22:28:43 +00:00
mdct_tables.c	oops ! shouldn't have removed mdct_tables.	2010-08-05 06:10:14 +00:00
mdct_tables.h	oops ! shouldn't have removed mdct_tables.	2010-08-05 06:10:14 +00:00
quant.h
README.rockbox	update wmapro's README.	2010-08-05 06:37:53 +00:00
SOURCES	Fix reds.	2010-08-05 06:17:18 +00:00
wma.c	Use codeclib's mdct in wmapro. Input coeffs to the transform needed to be scaled down first by (log2(frame_size) - 3). Increases decoding speed by 1.3MHz on PP5022 and saves ~32KB that were previously needed by the mdct tables. (FS#11511 by Buschel and myself)	2010-08-04 22:29:50 +00:00
wma.h	Increase wmapro decoder output sample depth to 24 bits, makes the mean error between our output and the original floating point decoder ~5e-8. (FS#11498 by Buschel)	2010-08-04 23:21:35 +00:00
wmapro_math.h	Another minor ARM speedup for libwmapro. Drop lsb of multiplication result in fixmul31(). The difference to current implementation is +/-1 in the output signal. Same routines are used for other codecs and in the codec lib as well.	2010-08-05 21:59:29 +00:00
wmaprodata.h
wmaprodec.c	Use more IRAM on S5L870x to speed up wmapro by ~2%.	2011-05-20 23:28:09 +00:00
wmaprodec.h	Use more IRAM on S5L870x to speed up wmapro by ~2%.	2011-05-20 23:28:09 +00:00

README.rockbox

Library: libwmapro
Imported: 2010-04-30 by Mohamed Tarek

This set of files form the files needed from ffmpeg's libavcodec and libavutil
to build a standalone wma professional decoder.

LICENSING INFORMATION

ffmpeg is licensed under the Lesser GNU General Public License and the file
wmaprodec.c is copyright (c) 2007 Baptiste Coudurier, Benjamin Larsson, Ulion
and copyright (c) 2008 - 2009 Sascha Sommer, Benjamin Larsson.

IMPORT DETAILS

Based on ffmpeg svn r22886 dated 15 April 2010.

The decoder is a heavily modified version of the original ffmpeg floating point
implementation. It's been modified to use fixed point arithmetic and now plays
and seeks on all the targets that Rockbox supports. Currently only supports mono
and stereo streams, streams with more than 2 channels are not yet supported.