diff options
Diffstat (limited to 'drivers/staging/echo/echo.c')
| -rw-r--r-- | drivers/staging/echo/echo.c | 42 |
1 files changed, 16 insertions, 26 deletions
diff --git a/drivers/staging/echo/echo.c b/drivers/staging/echo/echo.c index fd4007e329e7..6d7217e1bd06 100644 --- a/drivers/staging/echo/echo.c +++ b/drivers/staging/echo/echo.c @@ -27,8 +27,6 @@ * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. - * - * $Id: echo.c,v 1.20 2006/12/01 18:00:48 steveu Exp $ */ /*! \file */ @@ -113,17 +111,17 @@ #define MIN_TX_POWER_FOR_ADAPTION 64 #define MIN_RX_POWER_FOR_ADAPTION 64 -#define DTD_HANGOVER 600 /* 600 samples, or 75ms */ -#define DC_LOG2BETA 3 /* log2() of DC filter Beta */ +#define DTD_HANGOVER 600 /* 600 samples, or 75ms */ +#define DC_LOG2BETA 3 /* log2() of DC filter Beta */ /*-----------------------------------------------------------------------*\ - FUNCTIONS + FUNCTIONS \*-----------------------------------------------------------------------*/ /* adapting coeffs using the traditional stochastic descent (N)LMS algorithm */ #ifdef __bfin__ -static void __inline__ lms_adapt_bg(struct oslec_state *ec, int clean, +static inline void lms_adapt_bg(struct oslec_state *ec, int clean, int shift) { int i, j; @@ -147,13 +145,13 @@ static void __inline__ lms_adapt_bg(struct oslec_state *ec, int clean, /* st: and en: help us locate the assembler in echo.s */ - //asm("st:"); + /* asm("st:"); */ n = ec->taps; for (i = 0, j = offset2; i < n; i++, j++) { exp = *phist++ * factor; ec->fir_taps16[1][i] += (int16_t) ((exp + (1 << 14)) >> 15); } - //asm("en:"); + /* asm("en:"); */ /* Note the asm for the inner loop above generated by Blackfin gcc 4.1.1 is pretty good (note even parallel instructions used): @@ -195,7 +193,7 @@ static void __inline__ lms_adapt_bg(struct oslec_state *ec, int clean, */ #else -static __inline__ void lms_adapt_bg(struct oslec_state *ec, int clean, +static inline void lms_adapt_bg(struct oslec_state *ec, int clean, int shift) { int i; @@ -249,9 +247,8 @@ struct oslec_state *oslec_create(int len, int adaption_mode) fir16_create(&ec->fir_state, ec->fir_taps16[0], ec->taps); fir16_create(&ec->fir_state_bg, ec->fir_taps16[1], ec->taps); - for (i = 0; i < 5; i++) { + for (i = 0; i < 5; i++) ec->xvtx[i] = ec->yvtx[i] = ec->xvrx[i] = ec->yvrx[i] = 0; - } ec->cng_level = 1000; oslec_adaption_mode(ec, adaption_mode); @@ -271,14 +268,13 @@ struct oslec_state *oslec_create(int len, int adaption_mode) return ec; - error_oom: +error_oom: for (i = 0; i < 2; i++) kfree(ec->fir_taps16[i]); kfree(ec); return NULL; } - EXPORT_SYMBOL_GPL(oslec_create); void oslec_free(struct oslec_state *ec) @@ -292,14 +288,12 @@ void oslec_free(struct oslec_state *ec) kfree(ec->snapshot); kfree(ec); } - EXPORT_SYMBOL_GPL(oslec_free); void oslec_adaption_mode(struct oslec_state *ec, int adaption_mode) { ec->adaption_mode = adaption_mode; } - EXPORT_SYMBOL_GPL(oslec_adaption_mode); void oslec_flush(struct oslec_state *ec) @@ -326,14 +320,12 @@ void oslec_flush(struct oslec_state *ec) ec->curr_pos = ec->taps - 1; ec->Pstates = 0; } - EXPORT_SYMBOL_GPL(oslec_flush); void oslec_snapshot(struct oslec_state *ec) { memcpy(ec->snapshot, ec->fir_taps16[0], ec->taps * sizeof(int16_t)); } - EXPORT_SYMBOL_GPL(oslec_snapshot); /* Dual Path Echo Canceller ------------------------------------------------*/ @@ -399,7 +391,7 @@ int16_t oslec_update(struct oslec_state *ec, int16_t tx, int16_t rx) /* efficient "out with the old and in with the new" algorithm so we don't have to recalculate over the whole block of samples. */ - new = (int)tx *(int)tx; + new = (int)tx * (int)tx; old = (int)ec->fir_state.history[ec->fir_state.curr_pos] * (int)ec->fir_state.history[ec->fir_state.curr_pos]; ec->Pstates += @@ -498,15 +490,15 @@ int16_t oslec_update(struct oslec_state *ec, int16_t tx, int16_t rx) if ((ec->adaption_mode & ECHO_CAN_USE_ADAPTION) && (ec->nonupdate_dwell == 0) && - (8 * ec->Lclean_bg < - 7 * ec->Lclean) /* (ec->Lclean_bg < 0.875*ec->Lclean) */ && - (8 * ec->Lclean_bg < - ec->Ltx) /* (ec->Lclean_bg < 0.125*ec->Ltx) */ ) { + /* (ec->Lclean_bg < 0.875*ec->Lclean) */ + (8 * ec->Lclean_bg < 7 * ec->Lclean) && + /* (ec->Lclean_bg < 0.125*ec->Ltx) */ + (8 * ec->Lclean_bg < ec->Ltx)) { if (ec->cond_met == 6) { /* BG filter has had better results for 6 consecutive samples */ ec->adapt = 1; memcpy(ec->fir_taps16[0], ec->fir_taps16[1], - ec->taps * sizeof(int16_t)); + ec->taps * sizeof(int16_t)); } else ec->cond_met++; } else @@ -580,7 +572,6 @@ int16_t oslec_update(struct oslec_state *ec, int16_t tx, int16_t rx) return (int16_t) ec->clean_nlp << 1; } - EXPORT_SYMBOL_GPL(oslec_update); /* This function is seperated from the echo canceller is it is usually called @@ -604,7 +595,7 @@ EXPORT_SYMBOL_GPL(oslec_update); precision, which noise shapes things, giving very clean DC removal. */ -int16_t oslec_hpf_tx(struct oslec_state * ec, int16_t tx) +int16_t oslec_hpf_tx(struct oslec_state *ec, int16_t tx) { int tmp, tmp1; @@ -629,7 +620,6 @@ int16_t oslec_hpf_tx(struct oslec_state * ec, int16_t tx) return tx; } - EXPORT_SYMBOL_GPL(oslec_hpf_tx); MODULE_LICENSE("GPL"); |