Mpegplayer: Assembler optimised IDCT for coldfire, based on FS #5995 by Karim Boucher. Put the IDCT block buffer in IRAM for better performance. The whole libmpeg2 decoder struct doesn't fit without throwing some libmad buffers out of IRAM, but then doesn't change performance significantly. Mpegplayer is quite usable now on X5; H300 is sort-of usable for widescreen.

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@15156 a1c6a512-1295-4272-9138-f99709370657

1 files changed, 6 insertions, 0 deletions

diff --git a/apps/plugins/mpegplayer/mpeg2_internal.h b/apps/plugins/mpegplayer/mpeg2_internal.h
index 0c552b766f..1ec85c60f1 100644
--- a/apps/plugins/mpegplayer/mpeg2_internal.h
+++ b/apps/plugins/mpegplayer/mpeg2_internal.h
@@ -20,6 +20,8 @@
  * along with this program; if not, write to the Free Software
  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  */
+ 
+#include "config.h" /* for Rockbox CPU_ #defines */
 
 /* macroblock modes */
 #define MACROBLOCK_INTRA 1
@@ -92,7 +94,11 @@ struct mpeg2_decoder_s {
     int16_t dc_dct_pred[3];
 
     /* DCT coefficients */
+#ifdef CPU_COLDFIRE
+    int16_t *DCTblock;  /* put buffer separately to have it in IRAM */
+#else
     int16_t DCTblock[64] ATTR_ALIGN(64);
+#endif
 
     uint8_t * picture_dest[3];
     void (* convert) (void * convert_id, uint8_t * const * src,