libtremor: Implement a memory configuration for targets that don't use separate iram for codecs.

Such targets would previously default to using the configuration for targets with small iram which uses an extra memcpy per block.
This saves 2MHz decoding a 128kbps vorbis file on the Gigabeat S and saves a bit of codec buffer.
Patch from FS#11268, also replaces patch from FS#12147.


git-svn-id: svn://svn.rockbox.org/rockbox/trunk@29976 a1c6a512-1295-4272-9138-f99709370657

1 files changed, 7 insertions, 2 deletions

diff --git a/apps/codecs/libtremor/config-tremor.h b/apps/codecs/libtremor/config-tremor.h
index 2f93072d63..eba0fe0912 100644
--- a/apps/codecs/libtremor/config-tremor.h
+++ b/apps/codecs/libtremor/config-tremor.h
@@ -23,9 +23,13 @@
 #define ICODE_ATTR_TREMOR_NOT_MDCT ICODE_ATTR
 #endif
 
+/* Enable special handling of buffers in faster ram, not usefull when no
+   such different ram is available. There are 3 different memory configurations
+   * No special iram, uses double buffers to avoid copying data
+   * Small special iram, copies buffers to run hottest processing in iram
+   * Large iram, uses double buffers in iram */
 #ifdef USE_IRAM
 #define TREMOR_USE_IRAM
-#endif
 
 /* Define CPU of large IRAM (PP5022/5024, MCF5250)     */
 #if (CONFIG_CPU == PP5022) || (CONFIG_CPU == PP5024) || defined(CPU_S5L870X) || (CONFIG_CPU == MCF5250)
@@ -34,13 +38,14 @@
  * TOTAL         : 41984                               */
 #define IRAM_IBSS_SIZE 41984
 
-/* Define CPU of Normal IRAM (96KB) (and SIM also)     */
+/* Define CPU of Normal IRAM (96KB)                    */
 #else
 /* PCM_BUFFER    : 16384 Byte (2048*2*4)               *
  * WINDOW_LOOKUP : 4608 Byte (128*4 + 1024*4)          *
  * TOTAL         : 20992                               */
 #define IRAM_IBSS_SIZE 20992
 #endif
+#endif
 
 /* max 2 channels  */
 #define CHANNELS 2