Modify libatrac to use fixed-point arithmetic.

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@22298 a1c6a512-1295-4272-9138-f99709370657

1 files changed, 8 insertions, 2 deletions

diff --git a/apps/codecs/libatrac/README.rockbox b/apps/codecs/libatrac/README.rockbox
index 7f62e10bb4..46738e7d7b 100644
--- a/apps/codecs/libatrac/README.rockbox
+++ b/apps/codecs/libatrac/README.rockbox
@@ -8,13 +8,19 @@ ffmpeg is licensed under the Lesser GNU General Public License.
 
 IMPORT DETAILS
 
-The decoder is based on ffmpeg-svn r18079. It still uses floating 
-point math and not suitable to be used in rockbox.
+The decoder is based on ffmpeg-svn r18079.
+The decoder had been modified to use fixed-point arithmetic.
 
 TESTING
 
 The test program should compile in any Unix-like environment using the
 command "make -f Makefile.test".
 
+For ARM targets add -DCPU_ARM to CFLAGS in Makefile.test to make use of 
+the asm ARM optimisations in rockbox's mdct library.
+
+For Big-endian targets, change -D"ROCKBOX_LITTLE_ENDIAN=1" 
+to -D"ROCKBOX_BIG_ENDIAN=1" in Makefile.test.
+
 Running "./atractest file.rm" will decode the audio data to a WAV file
 called "output.wav" in the current directory.