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echo-cancel: orc-ify some bits for optimisation

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This uses Orc to optimise an inner loop in the core NLMS function of the
Adrian echo canceller.
This commit is contained in:
Arun Raghavan 2010-09-13 18:41:30 +05:30
parent 963250abb9
commit 83d3c8f22b
9 changed files with 472 additions and 5 deletions
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4
src/modules/echo-cancel/adrian-aec.h
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@ -23,7 +23,7 @@
#define WIDEB 2
// use double if your CPU does software-emulation of float
typedef float REAL;
#define REAL float
/* dB Values */
#define M0dB 1.0f
@ -306,7 +306,7 @@ struct AEC {
// NLMS-pw
REAL x[NLMS_LEN + NLMS_EXT]; // tap delayed loudspeaker signal
REAL xf[NLMS_LEN + NLMS_EXT]; // pre-whitening tap delayed signal
REAL w[NLMS_LEN]; // tap weights
PA_DECLARE_ALIGNED(16, REAL, w[NLMS_LEN]); // tap weights
int j; // optimize: less memory copies
double dotp_xf_xf; // double to avoid loss of precision
float delta; // noise floor to stabilize NLMS