diff options
Diffstat (limited to 'libspeexdsp/math_approx.h')
| -rw-r--r-- | libspeexdsp/math_approx.h | 14 |
1 files changed, 7 insertions, 7 deletions
diff --git a/libspeexdsp/math_approx.h b/libspeexdsp/math_approx.h index 9ca8307..596dfdc 100644 --- a/libspeexdsp/math_approx.h +++ b/libspeexdsp/math_approx.h @@ -7,18 +7,18 @@ Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met: - + - Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer. - + - Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution. - + - Neither the name of the Xiph.org Foundation nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission. - + THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR @@ -168,11 +168,11 @@ static inline spx_word16_t spx_acos(spx_word16_t x) x = NEG16(x); } x = SUB16(16384,x); - + x = x >> 1; sq = MULT16_16_Q13(x, ADD16(A1, MULT16_16_Q13(x, ADD16(A2, MULT16_16_Q13(x, (A3)))))); ret = spx_sqrt(SHL32(EXTEND32(sq),13)); - + /*ret = spx_sqrt(67108864*(-1.6129e-04 + 2.0104e+00*f + 2.7373e-01*f*f + 1.8136e-01*f*f*f));*/ if (s) ret = SUB16(25736,ret); @@ -208,7 +208,7 @@ static inline spx_word16_t spx_cos(spx_word16_t x) static inline spx_word16_t _spx_cos_pi_2(spx_word16_t x) { spx_word16_t x2; - + x2 = MULT16_16_P15(x,x); return ADD16(1,MIN16(32766,ADD32(SUB16(L1,x2), MULT16_16_P15(x2, ADD32(L2, MULT16_16_P15(x2, ADD32(L3, MULT16_16_P15(L4, x2)))))))); } |