SPC Codec: Refactor for CPU and clean up some things.

CPU optimization gets its own files in which to fill-in optimizable
routines.

Some pointless #if 0's for profiling need removal. Those macros are
empty if not profiling.

Force some functions that are undesirable to be force-inlined by the
compiler to be not inlined.

Change-Id: Ia7b7e45380d7efb20c9b1a4d52e05db3ef6bbaab

lib/rbcodec/codecs/libspc/cpu/spc_dsp_coldfire.h

@@ -0,0 +1,45 @@
+/***************************************************************************
+ *             __________               __   ___.
+ *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
+ *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
+ *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
+ *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
+ *                     \/            \/     \/    \/            \/
+ * $Id$
+ *
+ * Copyright (C) 2007 Michael Sevakis (jhMikeS)
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+ * KIND, either express or implied.
+ *
+ ****************************************************************************/
+#if !SPC_NOECHO
+
+#define SPC_DSP_ECHO_APPLY
+
+enum
+{
+    FIR_BUF_CNT   = FIR_BUF_HALF,
+    FIR_BUF_SIZE  = FIR_BUF_CNT * sizeof ( int32_t ),
+    FIR_BUF_ALIGN = FIR_BUF_SIZE * 2,
+    FIR_BUF_MASK  = ~((FIR_BUF_ALIGN / 2) | (sizeof ( int32_t ) - 1))
+};
+
+/* Echo filter structure embedded in struct Spc_Dsp */
+struct echo_filter
+{
+    /* FIR history is interleaved. Hardware handles wrapping by mask.
+     * |LR|LR|LR|LR|LR|LR|LR|LR| */
+    int32_t* ptr;
+    /* wrapped address just behind current position -
+       allows mac.w to increment and mask ptr */
+    int32_t* hist_ptr;
+    /* copy of echo FIR constants as int16_t for use with mac.w */
+    int16_t coeff [VOICE_COUNT];
+};
+#endif /* !SPC_NOECHO */