add True Audio (TTA) codec

decoding speed iPod video ~153%
But in some players, the decoding speed is not enough.
(e.g., H180 52.4% (thanks amiconn), H300 55.09% (thanks n1s))

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@25994 a1c6a512-1295-4272-9138-f99709370657

1 files changed, 34 insertions, 0 deletions

diff --git a/apps/codecs/libtta/README.rockbox b/apps/codecs/libtta/README.rockbox
new file mode 100644
index 0000000000..d605986d46
--- /dev/null
+++ b/apps/codecs/libtta/README.rockbox
@@ -0,0 +1,34 @@
+Library: True Audio
+Imported by : Yoshihisa Uchida
+Import date : 2010-03-05
+Baseed by   : TTA library version 1.2 for hardware players (ttalib-hwplayer-1.2.tgz)
+              from http://true-audio.com/Free_Downloads
+
+This directory contains a decoder version of True Auido.
+
+LICENSING INFORMATION
+
+True Audio license is described in the README file or each source file (excepts filter_arm.S) 
+in this directory.
+
+Limitation
+
+In some players, the decoding speed is not enough ( < 110%). 
+(For example, H180: decoding speed  < 60%)
+
+IMPORT DETAILS
+
+The .[ch] files from ttalib-hwplayer-1.2.tgz were imported into Rockbox. 
+But the following files do not include.
+   Makefile
+   tta.vcproj
+   samples/*
+
+
+When source files import in Rockbox, I changed below.
+
+all files
+  - TAB => 4 spaces.
+  - // style comments changes to /* */ style.
+
+Moreover, I modify to optimize the decoding speed.