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authorMichael Sevakis <jethead71@rockbox.org>2013-04-12 23:35:47 -0400
committerMichael Sevakis <jethead71@rockbox.org>2013-04-15 12:02:05 -0400
commit0c7b7873984e04941c9f21fa272638018fdb9a16 (patch)
treefb6afca45d2bef0a2c91732a39ffc0b965f5c557 /firmware/include
parentfd9e2568908f91b5bcf7378dc28f6ec070d6027a (diff)
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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
Diffstat (limited to 'firmware/include')
-rw-r--r--firmware/include/fixedpoint.h5
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.
*/