Fixed MAC initialization problem with mpa codec and removed workaround

for that bug.


git-svn-id: svn://svn.rockbox.org/rockbox/trunk@7260 a1c6a512-1295-4272-9138-f99709370657

apps/codecs/Tremor/asm_mcf5249.h

@@ -29,10 +29,6 @@
 
 #define MB()
 
-static inline void mcf5249_init_mac(void) {
-  asm volatile ("move.l #0x20, %macsr;");  /* frac, truncate, no saturation */
-}
-
 static inline ogg_int32_t MULT32(ogg_int32_t x, ogg_int32_t y) {
 
   asm volatile ("mac.l %[x], %[y], %%acc0;"    /* multiply & shift  */

apps/codecs/Tremor/vorbisfile.c

@@ -21,6 +21,7 @@
 #include <errno.h>
 #include <string.h>
 #include <math.h>
+#include "system.h"
 
 #include "ivorbiscodec.h"
 #include "ivorbisfile.h"

apps/codecs/mpa.c

@@ -24,6 +24,7 @@
 #include "playback.h"
 #include "dsp.h"
 #include "lib/codeclib.h"
+#include "system.h"
 
 struct mad_stream Stream IDATA_ATTR;
 struct mad_frame Frame IDATA_ATTR;
@@ -92,7 +93,10 @@ enum codec_status codec_start(struct codec_api* api)
     ci->memset(&Frame, 0, sizeof(struct mad_frame));
     ci->memset(&Synth, 0, sizeof(struct mad_synth));
     ci->memset(&Timer, 0, sizeof(mad_timer_t));
-  
+    
+#if defined(CPU_COLDFIRE) && !defined(SIMULATOR)
+    mcf5249_init_mac();
+#endif
     mad_stream_init(&Stream);
     mad_frame_init(&Frame);
     mad_synth_init(&Synth);

firmware/export/system.h

@@ -125,6 +125,10 @@ enum {
      : /* %0 */ "d"(mask),   \
        /* %1 */ "a"(address))
 
+static inline void mcf5249_init_mac(void) {
+      asm volatile ("move.l #0x20, %macsr;");  /* frac, truncate, no saturation */
+}
+
 #endif
 
 #ifndef SIMULATOR

firmware/pcm_playback.c

@@ -184,19 +184,6 @@ void pcm_play_data(void (*get_more)(unsigned char** start, long* size))
     
     callback_for_more = get_more;
     
-    /** FIXME: This is a temporary fix to prevent playback glitches when
-      * playing the first file. We will just drop the first frame to prevent
-      * that problem from occurring.
-      * Some debug data:
-      *   - This problem will occur only when the first file.
-      *   - First frame will be totally corrupt and the song will begin
-      *     from the next frame. But at the next time (when the bug has
-      *     already happened), the song will start from first frame.
-      *   - Dropping some frames directly from (mpa) codec will also
-      *     prevent the problem from happening. So it's unlikely you can
-      *     find the explanation for this bug from this file.
-      */
-    get_more((unsigned char **)&start, (long *)&size); // REMOVE THIS TO TEST
     get_more((unsigned char **)&start, (long *)&size);
     get_more(&next_start, &next_size);
     dma_start(start, size);