Commit FS#9882 - make better use of iram at different quality encodings, remove redundant memsets, implement doublebuffer if it will fit in iram to save a mempcy each frame, and some alignment fixes for coldfire

git-svn-id: svn://svn.rockbox.org/rockbox/trunk@20783 a1c6a512-1295-4272-9138-f99709370657

1 files changed, 24 insertions, 0 deletions

diff --git a/apps/codecs/libtremor/oggmalloc.c b/apps/codecs/libtremor/oggmalloc.c
index 4aa2760629..6da7cfcedc 100644
--- a/apps/codecs/libtremor/oggmalloc.c
+++ b/apps/codecs/libtremor/oggmalloc.c
@@ -81,3 +81,27 @@ void ogg_tmpmalloc_free(long pos)
 {
     tmp_ptr = pos;
 }
+
+/* Allocate IRAM buffer */
+static unsigned char iram_buff[IRAM_IBSS_SIZE] IBSS_ATTR __attribute__ ((aligned (16)));
+static size_t iram_remain;
+
+void iram_malloc_init(void){
+    iram_remain=IRAM_IBSS_SIZE;
+}
+
+void *iram_malloc(size_t size){
+    void* x;
+    
+    /* always ensure 16-byte aligned */
+    if(size&0x0f)
+      size=(size-(size&0x0f))+16;
+      
+    if(size>iram_remain)
+      return NULL;
+    
+    x = &iram_buff[IRAM_IBSS_SIZE-iram_remain];
+    iram_remain-=size;
+
+    return x;
+}