Additional status callback is added to pcm_play/rec_data instead of
using a special function to set it. Status includes DMA error
reporting to the status callback. Playback and recording callback
become more alike except playback uses "const void **addr" (because
the data should not be altered) and recording  uses "void **addr".
"const" is put in place throughout where appropriate.

Most changes are fairly trivial. One that should be checked in
particular because it isn't so much is telechips, if anyone cares to
bother. PP5002 is not so trivial either but that tested as working.

Change-Id: I4928d69b3b3be7fb93e259f81635232df9bd1df2
Reviewed-on: http://gerrit.rockbox.org/166
Reviewed-by: Michael Sevakis <jethead71@rockbox.org>
Tested-by: Michael Sevakis <jethead71@rockbox.org>

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@27288 a1c6a512-1295-4272-9138-f99709370657

Updated copyright years where needed.


git-svn-id: svn://svn.rockbox.org/rockbox/trunk@26457 a1c6a512-1295-4272-9138-f99709370657

* Reverted minimal working memory to 4 MB
* Reverted size of a single audio buffer
* Optimized sound output loop


git-svn-id: svn://svn.rockbox.org/rockbox/trunk@26454 a1c6a512-1295-4272-9138-f99709370657

Change pdbox include paths to handle this



git-svn-id: svn://svn.rockbox.org/rockbox/trunk@24916 a1c6a512-1295-4272-9138-f99709370657

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@21816 a1c6a512-1295-4272-9138-f99709370657

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@21626 a1c6a512-1295-4272-9138-f99709370657