ebc58c9f06
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@12241 a1c6a512-1295-4272-9138-f99709370657
419 lines
13 KiB
C
419 lines
13 KiB
C
/* Copyright (C) 2005 Analog Devices */
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/**
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@file ltp_bfin.h
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@author Jean-Marc Valin
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@brief Long-Term Prediction functions (Blackfin version)
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*/
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/*
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions
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are met:
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- Redistributions of source code must retain the above copyright
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notice, this list of conditions and the following disclaimer.
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- Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in the
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documentation and/or other materials provided with the distribution.
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- Neither the name of the Xiph.org Foundation nor the names of its
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contributors may be used to endorse or promote products derived from
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this software without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR
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CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#define OVERRIDE_INNER_PROD
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spx_word32_t inner_prod(const spx_word16_t *x, const spx_word16_t *y, int len)
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{
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spx_word32_t sum=0;
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__asm__ __volatile__ (
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"P0 = %3;\n\t"
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"P1 = %1;\n\t"
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"P2 = %2;\n\t"
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"I0 = P1;\n\t"
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"I1 = P2;\n\t"
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"L0 = 0;\n\t"
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"L1 = 0;\n\t"
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"A0 = 0;\n\t"
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"R0.L = W[I0++] || R1.L = W[I1++];\n\t"
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"LOOP inner%= LC0 = P0;\n\t"
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"LOOP_BEGIN inner%=;\n\t"
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"A0 += R0.L*R1.L (IS) || R0.L = W[I0++] || R1.L = W[I1++];\n\t"
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"LOOP_END inner%=;\n\t"
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"A0 += R0.L*R1.L (IS);\n\t"
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"A0 = A0 >>> 6;\n\t"
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"R0 = A0;\n\t"
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"%0 = R0;\n\t"
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: "=m" (sum)
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: "m" (x), "m" (y), "d" (len-1)
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: "P0", "P1", "P2", "R0", "R1", "A0", "I0", "I1", "L0", "L1", "R3"
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);
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return sum;
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}
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#define OVERRIDE_PITCH_XCORR
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void pitch_xcorr(const spx_word16_t *_x, const spx_word16_t *_y, spx_word32_t *corr, int len, int nb_pitch, char *stack)
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{
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corr += nb_pitch - 1;
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__asm__ __volatile__ (
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"P2 = %0;\n\t"
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"I0 = P2;\n\t" /* x in I0 */
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"B0 = P2;\n\t" /* x in B0 */
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"R0 = %3;\n\t" /* len in R0 */
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"P3 = %3;\n\t"
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"P3 += -2;\n\t" /* len in R0 */
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"P4 = %4;\n\t" /* nb_pitch in R0 */
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"R1 = R0 << 1;\n\t" /* number of bytes in x */
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"L0 = R1;\n\t"
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"P0 = %1;\n\t"
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"P1 = %2;\n\t"
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"B1 = P1;\n\t"
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"L1 = 0;\n\t" /*Disable looping on I1*/
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"r0 = [I0++];\n\t"
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"LOOP pitch%= LC0 = P4 >> 1;\n\t"
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"LOOP_BEGIN pitch%=;\n\t"
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"I1 = P0;\n\t"
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"A1 = A0 = 0;\n\t"
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"R1 = [I1++];\n\t"
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"LOOP inner_prod%= LC1 = P3 >> 1;\n\t"
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"LOOP_BEGIN inner_prod%=;\n\t"
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"A1 += R0.L*R1.H, A0 += R0.L*R1.L (IS) || R1.L = W[I1++];\n\t"
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"A1 += R0.H*R1.L, A0 += R0.H*R1.H (IS) || R1.H = W[I1++] || R0 = [I0++];\n\t"
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"LOOP_END inner_prod%=;\n\t"
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"A1 += R0.L*R1.H, A0 += R0.L*R1.L (IS) || R1.L = W[I1++];\n\t"
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"A1 += R0.H*R1.L, A0 += R0.H*R1.H (IS) || R0 = [I0++];\n\t"
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"A0 = A0 >>> 6;\n\t"
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"A1 = A1 >>> 6;\n\t"
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"R2 = A0, R3 = A1;\n\t"
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"[P1--] = r2;\n\t"
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"[P1--] = r3;\n\t"
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"P0 += 4;\n\t"
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"LOOP_END pitch%=;\n\t"
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"L0 = 0;\n\t"
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: : "m" (_x), "m" (_y), "m" (corr), "m" (len), "m" (nb_pitch)
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: "A0", "A1", "P0", "P1", "P2", "P3", "P4", "R0", "R1", "R2", "R3", "I0", "I1", "L0", "L1", "B0", "B1", "memory"
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);
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}
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#define OVERRIDE_COMPUTE_PITCH_ERROR
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static inline spx_word32_t compute_pitch_error(spx_word16_t *C, spx_word16_t *g, spx_word16_t pitch_control)
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{
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spx_word32_t sum;
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__asm__ __volatile__
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(
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"A0 = 0;\n\t"
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"R0 = W[%1++];\n\t"
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"R1.L = %2.L*%5.L (IS);\n\t"
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"A0 += R1.L*R0.L (IS) || R0 = W[%1++];\n\t"
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"R1.L = %3.L*%5.L (IS);\n\t"
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"A0 += R1.L*R0.L (IS) || R0 = W[%1++];\n\t"
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"R1.L = %4.L*%5.L (IS);\n\t"
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"A0 += R1.L*R0.L (IS) || R0 = W[%1++];\n\t"
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"R1.L = %2.L*%3.L (IS);\n\t"
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"A0 -= R1.L*R0.L (IS) || R0 = W[%1++];\n\t"
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"R1.L = %4.L*%3.L (IS);\n\t"
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"A0 -= R1.L*R0.L (IS) || R0 = W[%1++];\n\t"
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"R1.L = %4.L*%2.L (IS);\n\t"
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"A0 -= R1.L*R0.L (IS) || R0 = W[%1++];\n\t"
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"R1.L = %2.L*%2.L (IS);\n\t"
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"A0 -= R1.L*R0.L (IS) || R0 = W[%1++];\n\t"
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"R1.L = %3.L*%3.L (IS);\n\t"
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"A0 -= R1.L*R0.L (IS) || R0 = W[%1++];\n\t"
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"R1.L = %4.L*%4.L (IS);\n\t"
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"A0 -= R1.L*R0.L (IS);\n\t"
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"%0 = A0;\n\t"
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: "=&D" (sum), "=a" (C)
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: "d" (g[0]), "d" (g[1]), "d" (g[2]), "d" (pitch_control), "1" (C)
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: "R0", "R1", "R2", "A0"
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);
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return sum;
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}
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#define OVERRIDE_OPEN_LOOP_NBEST_PITCH
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#ifdef OVERRIDE_OPEN_LOOP_NBEST_PITCH
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void open_loop_nbest_pitch(spx_word16_t *sw, int start, int end, int len, int *pitch, spx_word16_t *gain, int N, char *stack)
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{
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int i,j,k;
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VARDECL(spx_word32_t *best_score);
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VARDECL(spx_word32_t *best_ener);
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spx_word32_t e0;
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VARDECL(spx_word32_t *corr);
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VARDECL(spx_word32_t *energy);
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ALLOC(best_score, N, spx_word32_t);
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ALLOC(best_ener, N, spx_word32_t);
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ALLOC(corr, end-start+1, spx_word32_t);
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ALLOC(energy, end-start+2, spx_word32_t);
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for (i=0;i<N;i++)
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{
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best_score[i]=-1;
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best_ener[i]=0;
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pitch[i]=start;
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}
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energy[0]=inner_prod(sw-start, sw-start, len);
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e0=inner_prod(sw, sw, len);
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/* energy update -------------------------------------*/
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__asm__ __volatile__
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(
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" P0 = %0;\n\t"
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" I1 = %1;\n\t"
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" L1 = 0;\n\t"
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" I2 = %2;\n\t"
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" L2 = 0;\n\t"
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" R2 = [P0++];\n\t"
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" R3 = 0;\n\t"
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" LSETUP (eu1, eu2) LC1 = %3;\n\t"
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"eu1: R1.L = W [I1--] || R0.L = W [I2--] ;\n\t"
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" R1 = R1.L * R1.L (IS);\n\t"
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" R0 = R0.L * R0.L (IS);\n\t"
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" R1 >>>= 6;\n\t"
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" R1 = R1 + R2;\n\t"
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" R0 >>>= 6;\n\t"
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" R1 = R1 - R0;\n\t"
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" R2 = MAX(R1,R3);\n\t"
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"eu2: [P0++] = R2;\n\t"
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: : "d" (energy), "d" (&sw[-start-1]), "d" (&sw[-start+len-1]),
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"a" (end-start)
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: "P0", "I1", "I2", "R0", "R1", "R2", "R3"
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#if (__GNUC__ == 4)
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, "LC1"
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#endif
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);
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pitch_xcorr(sw, sw-end, corr, len, end-start+1, stack);
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/* FIXME: Fixed-point and floating-point code should be merged */
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{
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VARDECL(spx_word16_t *corr16);
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VARDECL(spx_word16_t *ener16);
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ALLOC(corr16, end-start+1, spx_word16_t);
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ALLOC(ener16, end-start+1, spx_word16_t);
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/* Normalize to 180 so we can square it and it still fits in 16 bits */
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normalize16(corr, corr16, 180, end-start+1);
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normalize16(energy, ener16, 180, end-start+1);
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if (N == 1) {
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/* optimised asm to handle N==1 case */
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__asm__ __volatile__
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(
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" I0 = %1;\n\t" /* I0: corr16[] */
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" L0 = 0;\n\t"
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" I1 = %2;\n\t" /* I1: energy */
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" L1 = 0;\n\t"
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" R2 = -1;\n\t" /* R2: best score */
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" R3 = 0;\n\t" /* R3: best energy */
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" P0 = %4;\n\t" /* P0: best pitch */
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" P1 = %4;\n\t" /* P1: counter */
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" LSETUP (sl1, sl2) LC1 = %3;\n\t"
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"sl1: R0.L = W [I0++] || R1.L = W [I1++];\n\t"
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" R0 = R0.L * R0.L (IS);\n\t"
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" R1 += 1;\n\t"
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" R4 = R0.L * R3.L;\n\t"
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" R5 = R2.L * R1.L;\n\t"
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" cc = R5 < R4;\n\t"
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" if cc R2 = R0;\n\t"
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" if cc R3 = R1;\n\t"
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" if cc P0 = P1;\n\t"
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"sl2: P1 += 1;\n\t"
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" %0 = P0;\n\t"
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: "=&d" (pitch[0])
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: "a" (corr16), "a" (ener16), "a" (end+1-start), "d" (start)
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: "P0", "P1", "I0", "I1", "R0", "R1", "R2", "R3", "R4", "R5"
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#if (__GNUC__ == 4)
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, "LC1"
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#endif
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);
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}
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else {
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for (i=start;i<=end;i++)
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{
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spx_word16_t tmp = MULT16_16_16(corr16[i-start],corr16[i-start]);
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/* Instead of dividing the tmp by the energy, we multiply on the other side */
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if (MULT16_16(tmp,best_ener[N-1])>MULT16_16(best_score[N-1],ADD16(1,ener16[i-start])))
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{
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/* We can safely put it last and then check */
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best_score[N-1]=tmp;
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best_ener[N-1]=ener16[i-start]+1;
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pitch[N-1]=i;
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/* Check if it comes in front of others */
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for (j=0;j<N-1;j++)
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{
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if (MULT16_16(tmp,best_ener[j])>MULT16_16(best_score[j],ADD16(1,ener16[i-start])))
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{
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for (k=N-1;k>j;k--)
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{
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best_score[k]=best_score[k-1];
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best_ener[k]=best_ener[k-1];
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pitch[k]=pitch[k-1];
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}
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best_score[j]=tmp;
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best_ener[j]=ener16[i-start]+1;
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pitch[j]=i;
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break;
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}
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}
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}
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}
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}
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}
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/* Compute open-loop gain */
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if (gain)
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{
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for (j=0;j<N;j++)
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{
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spx_word16_t g;
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i=pitch[j];
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g = DIV32(corr[i-start], 10+SHR32(MULT16_16(spx_sqrt(e0),spx_sqrt(energy[i-start])),6));
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/* FIXME: g = max(g,corr/energy) */
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if (g<0)
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g = 0;
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gain[j]=g;
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}
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}
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}
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#endif
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#define OVERRIDE_PITCH_GAIN_SEARCH_3TAP_VQ
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#ifdef OVERRIDE_PITCH_GAIN_SEARCH_3TAP_VQ
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static int pitch_gain_search_3tap_vq(
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const signed char *gain_cdbk,
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int gain_cdbk_size,
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spx_word16_t *C16,
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spx_word16_t max_gain
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)
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{
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const signed char *ptr=gain_cdbk;
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int best_cdbk=0;
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spx_word32_t best_sum=-VERY_LARGE32;
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spx_word32_t sum=0;
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spx_word16_t g[3];
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spx_word16_t pitch_control=64;
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spx_word16_t gain_sum;
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int i;
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/* fast asm version of VQ codebook search */
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__asm__ __volatile__
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(
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" P0 = %2;\n\t" /* P0: ptr to gain_cdbk */
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" L1 = 0;\n\t" /* no circ addr for L1 */
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" %0 = 0;\n\t" /* %0: best_sum */
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" %1 = 0;\n\t" /* %1: best_cbdk */
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" P1 = 0;\n\t" /* P1: loop counter */
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" R5 = 64;\n\t" /* R5: pitch_control */
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" LSETUP (pgs1, pgs2) LC1 = %4;\n\t"
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"pgs1: R2 = B [P0++] (X);\n\t" /* R2: g[0] */
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" R3 = B [P0++] (X);\n\t" /* R3: g[1] */
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" R4 = B [P0++] (X);\n\t" /* R4: g[2] */
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" R2 += 32;\n\t"
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" R3 += 32;\n\t"
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" R4 += 32;\n\t"
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" R0 = B [P0++] (X);\n\t"
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" B0 = R0;\n\t" /* BO: gain_sum */
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/* compute_pitch_error() -------------------------------*/
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" I1 = %3;\n\t" /* I1: ptr to C */
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" A0 = 0;\n\t"
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" R0.L = W[I1++];\n\t"
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" R1.L = R2.L*R5.L (IS);\n\t"
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" A0 += R1.L*R0.L (IS) || R0.L = W[I1++];\n\t"
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" R1.L = R3.L*R5.L (IS);\n\t"
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" A0 += R1.L*R0.L (IS) || R0.L = W[I1++];\n\t"
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" R1.L = R4.L*R5.L (IS);\n\t"
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" A0 += R1.L*R0.L (IS) || R0.L = W[I1++];\n\t"
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" R1.L = R2.L*R3.L (IS);\n\t"
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" A0 -= R1.L*R0.L (IS) || R0.L = W[I1++];\n\t"
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" R1.L = R4.L*R3.L (IS);\n\t"
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" A0 -= R1.L*R0.L (IS) || R0.L = W[I1++];\n\t"
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" R1.L = R4.L*R2.L (IS);\n\t"
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" A0 -= R1.L*R0.L (IS) || R0.L = W[I1++];\n\t"
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" R1.L = R2.L*R2.L (IS);\n\t"
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" A0 -= R1.L*R0.L (IS) || R0.L = W[I1++];\n\t"
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" R1.L = R3.L*R3.L (IS);\n\t"
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" A0 -= R1.L*R0.L (IS) || R0.L = W[I1++];\n\t"
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" R1.L = R4.L*R4.L (IS);\n\t"
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" R0 = (A0 -= R1.L*R0.L) (IS);\n\t"
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/*
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Re-arrange the if-then to code efficiently on the Blackfin:
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if (sum>best_sum && gain_sum<=max_gain) ------ (1)
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if (sum>best_sum && !(gain_sum>max_gain)) ------ (2)
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if (max_gain<=gain_sum) { ------ (3)
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sum = -VERY_LARGE32;
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}
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if (best_sum<=sum)
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The blackin cc instructions are all of the form:
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cc = x < y (or cc = x <= y)
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*/
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" R1 = B0\n\t"
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" R2 = %5\n\t"
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" R3 = %6\n\t"
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" cc = R2 <= R1;\n\t"
|
|
" if cc R0 = R3;\n\t"
|
|
" cc = %0 <= R0;\n\t"
|
|
" if cc %0 = R0;\n\t"
|
|
" if cc %1 = P1;\n\t"
|
|
|
|
"pgs2: P1 += 1;\n\t"
|
|
|
|
: "=&d" (best_sum), "=&d" (best_cdbk)
|
|
: "a" (gain_cdbk), "a" (C16), "a" (gain_cdbk_size), "a" (max_gain),
|
|
"b" (-VERY_LARGE32)
|
|
: "R0", "R1", "R2", "R3", "R4", "R5", "P0",
|
|
"P1", "I1", "L1", "A0", "B0"
|
|
#if (__GNUC__ == 4)
|
|
, "LC1"
|
|
#endif
|
|
);
|
|
|
|
return best_cdbk;
|
|
}
|
|
#endif
|
|
|