Straighten out the mad twisted state of sound.c and related areas.

This is going right in since it's long overdue. If anything is goofed,
drop me a line or just tweak it yourself if you know what's wrong. :-)

Make HW/SW codec interface more uniform when emulating HW functionality
on SWCODEC for functions such as "audiohw_set_pitch". The firmware-to-
DSP plumbing is in firmware/drivers/audiohw-swcodec.c. "sound_XXX"
APIs are all in sound.c with none in DSP code any longer.

Reduce number of settings definitions needed by each codec by providing
defaults for common ones like balance, channels and SW tone controls.

Remove need for separate SIM code and tables and add virtual codec header
for hosted targets.

Change-Id: I3f23702bca054fc9bda40f49824ce681bb7f777b

1 files changed, 5 insertions, 0 deletions

diff --git a/firmware/include/fixedpoint.h b/firmware/include/fixedpoint.h
index 3e14bdd68e..584bd58d84 100644
--- a/firmware/include/fixedpoint.h
+++ b/firmware/include/fixedpoint.h
@@ -102,6 +102,11 @@ unsigned long isqrt(unsigned long x);
 #define FP_INF          (0x7fffffff)
 #define FP_NEGINF      -(0x7fffffff)
 
+/** FIXED POINT EXP10
+ * Return 10^x as FP integer.  Argument is FP integer.
+ */
+long fp_exp10(long x, unsigned int fracbits);
+
 /* fracbits in range 12 - 22 work well. Higher is better for
  * calculating dB, lower is better for calculating factor.
  */