diff options
Diffstat (limited to 'drivers/speex/lpc_bfin.h')
| -rw-r--r-- | drivers/speex/lpc_bfin.h | 131 |
1 files changed, 0 insertions, 131 deletions
diff --git a/drivers/speex/lpc_bfin.h b/drivers/speex/lpc_bfin.h deleted file mode 100644 index 7310ffba52..0000000000 --- a/drivers/speex/lpc_bfin.h +++ /dev/null @@ -1,131 +0,0 @@ -/* Copyright (C) 2005 Analog Devices */ -/** - @file lpc_bfin.h - @author Jean-Marc Valin - @brief Functions for LPC (Linear Prediction Coefficients) analysis (Blackfin version) -*/ -/* - 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 - A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR - CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, - EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, - PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR - PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF - LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING - NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS - SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. -*/ - -#define OVERRIDE_SPEEX_AUTOCORR -void _spx_autocorr( -const spx_word16_t *x, /* in: [0...n-1] samples x */ -spx_word16_t *ac, /* out: [0...lag-1] ac values */ -int lag, -int n - ) -{ - spx_word32_t d; - const spx_word16_t *xs; - int i, j; - spx_word32_t ac0=1; - spx_word32_t ac32[11], *ac32top; - int shift, ac_shift; - ac32top = ac32+lag-1; - int lag_1, N_lag; - int nshift; - lag_1 = lag-1; - N_lag = n-lag_1; - for (j=0;j<n;j++) - ac0 = ADD32(ac0,SHR32(MULT16_16(x[j],x[j]),8)); - ac0 = ADD32(ac0,n); - shift = 8; - while (shift && ac0<0x40000000) - { - shift--; - ac0 <<= 1; - } - ac_shift = 18; - while (ac_shift && ac0<0x40000000) - { - ac_shift--; - ac0 <<= 1; - } - - xs = x+lag-1; - nshift = -shift; - __asm__ __volatile__ - ( - "P2 = %0;\n\t" - "I0 = P2;\n\t" /* x in I0 */ - "B0 = P2;\n\t" /* x in B0 */ - "R0 = %3;\n\t" /* len in R0 */ - "P3 = %3;\n\t" /* len in R0 */ - "P4 = %4;\n\t" /* nb_pitch in R0 */ - "R1 = R0 << 1;\n\t" /* number of bytes in x */ - "L0 = R1;\n\t" - "P0 = %1;\n\t" - "P1 = %2;\n\t" - "B1 = P1;\n\t" - "R4 = %5;\n\t" - "L1 = 0;\n\t" /*Disable looping on I1*/ - - "r0 = [I0++];\n\t" - "R2 = 0;R3=0;" - "LOOP pitch%= LC0 = P4 >> 1;\n\t" - "LOOP_BEGIN pitch%=;\n\t" - "I1 = P0;\n\t" - "A1 = A0 = 0;\n\t" - "R1 = [I1++];\n\t" - "LOOP inner_prod%= LC1 = P3 >> 1;\n\t" - "LOOP_BEGIN inner_prod%=;\n\t" - "A1 += R0.L*R1.H, A0 += R0.L*R1.L (IS) || R1.L = W[I1++];\n\t" - "A1 += R0.H*R1.L, A0 += R0.H*R1.H (IS) || R1.H = W[I1++] || R0 = [I0++];\n\t" - "LOOP_END inner_prod%=;\n\t" - "A0 = ASHIFT A0 by R4.L;\n\t" - "A1 = ASHIFT A1 by R4.L;\n\t" - - "R2 = A0, R3 = A1;\n\t" - "[P1--] = R2;\n\t" - "[P1--] = R3;\n\t" - "P0 += 4;\n\t" - "LOOP_END pitch%=;\n\t" - : : "m" (xs), "m" (x), "m" (ac32top), "m" (N_lag), "m" (lag_1), "m" (nshift) - : "A0", "A1", "P0", "P1", "P2", "P3", "P4", "R0", "R1", "R2", "R3", "R4", "I0", "I1", "L0", "L1", "B0", "B1", "memory" - ); - d=0; - for (j=0;j<n;j++) - { - d = ADD32(d,SHR32(MULT16_16(x[j],x[j]), shift)); - } - ac32[0] = d; - - for (i=0;i<lag;i++) - { - d=0; - for (j=i;j<lag_1;j++) - { - d = ADD32(d,SHR32(MULT16_16(x[j],x[j-i]), shift)); - } - if (i) - ac32[i] += d; - ac[i] = SHR32(ac32[i], ac_shift); - } -} - |