diff options
Diffstat (limited to 'third_party/speex/libspeex/filters_bfin.h')
-rw-r--r-- | third_party/speex/libspeex/filters_bfin.h | 515 |
1 files changed, 515 insertions, 0 deletions
diff --git a/third_party/speex/libspeex/filters_bfin.h b/third_party/speex/libspeex/filters_bfin.h new file mode 100644 index 00000000..1e433ee1 --- /dev/null +++ b/third_party/speex/libspeex/filters_bfin.h @@ -0,0 +1,515 @@ +/* Copyright (C) 2005 Analog Devices */ +/** + @file filters_bfin.h + @brief Various analysis/synthesis filters (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_NORMALIZE16 +int normalize16(const spx_sig_t *x, spx_word16_t *y, spx_sig_t max_scale, int len) +{ + spx_sig_t max_val=1; + int sig_shift; + __asm__ + ( + "%0 = 0;\n\t" + "I0 = %1;\n\t" + "L0 = 0;\n\t" + "R1 = [I0++];\n\t" + "LOOP norm_max%= LC0 = %2;\n\t" + "LOOP_BEGIN norm_max%=;\n\t" + "R2 = ABS R1 || R1 = [I0++];\n\t" + "%0 = MAX(%0, R2);\n\t" + "LOOP_END norm_max%=;\n\t" + : "=&d" (max_val) + : "a" (x), "a" (len) + : "R1", "R2" + ); + + sig_shift=0; + while (max_val>max_scale) + { + sig_shift++; + max_val >>= 1; + } + + __asm__ __volatile__ + ( + "I0 = %0;\n\t" + "L0 = 0;\n\t" + "P1 = %1;\n\t" + "R0 = [I0++];\n\t" + "LOOP norm_shift%= LC0 = %3;\n\t" + "LOOP_BEGIN norm_shift%=;\n\t" + "R1 = ASHIFT R0 by %2.L || R0 = [I0++];\n\t" + "W[P1++] = R1;\n\t" + "LOOP_END norm_shift%=;\n\t" + "R1 = ASHIFT R0 by %2.L;\n\t" + "W[P1++] = R1;\n\t" + : : "a" (x), "a" (y), "d" (-sig_shift), "a" (len-1) + : "I0", "L0", "P1", "R0", "R1", "memory" + ); + return sig_shift; +} + + + +#define OVERRIDE_FILTER_MEM16 +void filter_mem16(const spx_word16_t *_x, const spx_coef_t *num, const spx_coef_t *den, spx_word16_t *_y, int N, int ord, spx_mem_t *mem, char *stack) +{ + VARDECL(spx_word32_t *xy2); + VARDECL(spx_word32_t *numden_a); + spx_word32_t *xy; + spx_word16_t *numden; + int i; + + ALLOC(xy2, (N+1), spx_word32_t); + ALLOC(numden_a, (2*ord+2), spx_word32_t); + xy = xy2+1; + numden = (spx_word16_t*) numden_a; + + for (i=0;i<ord;i++) + { + numden[2*i] = num[i]; + numden[2*i+1] = den[i]; + } + __asm__ __volatile__ + ( + /* Register setup */ + "R0 = %5;\n\t" /*ord */ + + "P0 = %3;\n\t" + "I0 = P0;\n\t" + "B0 = P0;\n\t" /* numden */ + "L0 = 0;\n\t" + + "P2 = %0;\n\t" /* Fused xy */ + "I2 = P2;\n\t" + "L2 = 0;\n\t" + + "P4 = %6;\n\t" /* mem */ + "P0 = %1;\n\t" /* _x */ + "P1 = %2;\n\t" /* _y */ + + /* First sample */ + "R1 = [P4++];\n\t" + "R1 <<= 3;\n\t" /* shift mem */ + "R1.L = R1 (RND);\n\t" + "R2 = W[P0++];\n\t" /* load x[0] */ + "R1.L = R1.L + R2.L;\n\t" + "W[P1++] = R1;\n\t" /* store y[0] */ + "R2 = PACK(R1.L, R2.L);\n\t" /* pack x16 and y16 */ + "[P2] = R2;\n\t" + + /* Samples 1 to ord-1 (using memory) */ + "R0 += -1;\n\t" + "R3 = 0;\n\t" + "LC0 = R0;\n\t" + "LOOP filter_start%= LC0;\n\t" + "LOOP_BEGIN filter_start%=;\n\t" + "R3 += 1;\n\t" + "LC1 = R3;\n\t" + + "R1 = [P4++];\n\t" + "A1 = R1;\n\t" + "A0 = 0;\n\t" + "I0 = B0;\n\t" + "I2 = P2;\n\t" + "P2 += 4;\n\t" + "R4 = [I0++] || R5 = [I2--];\n\t" + "LOOP filter_start_inner%= LC1;\n\t" + "LOOP_BEGIN filter_start_inner%=;\n\t" + "A1 -= R4.H*R5.H, A0 += R4.L*R5.L (IS) || R4 = [I0++] || R5 = [I2--];\n\t" + "LOOP_END filter_start_inner%=;\n\t" + "A0 += A1;\n\t" + "R4 = A0;\n\t" + "R4 <<= 3;\n\t" /* shift mem */ + "R4.L = R4 (RND);\n\t" + "R2 = W[P0++];\n\t" /* load x */ + "R4.L = R4.L + R2.L;\n\t" + "W[P1++] = R4;\n\t" /* store y */ + //"R4 <<= 2;\n\t" + //"R2 <<= 2;\n\t" + "R2 = PACK(R4.L, R2.L);\n\t" /* pack x16 and y16 */ + "[P2] = R2;\n\t" + + "LOOP_END filter_start%=;\n\t" + + /* Samples ord to N*/ + "R0 = %5;\n\t" + "R0 <<= 1;\n\t" + "I0 = B0;\n\t" /* numden */ + "R0 <<= 1;\n\t" + "L0 = R0;\n\t" + + "R0 = %5;\n\t" /* org */ + "R2 = %4;\n\t" /* N */ + "R2 = R2 - R0;\n\t" + "R4 = [I0++];\n\t" /* numden */ + "LC0 = R2;\n\t" + "P3 = R0;\n\t" + "R0 <<= 2;\n\t" + "R0 += 8;\n\t" + "I2 = P2;\n\t" + "M0 = R0;\n\t" + "A1 = A0 = 0;\n\t" + "R5 = [I2--];\n\t" /* load xy */ + "LOOP filter_mid%= LC0;\n\t" + "LOOP_BEGIN filter_mid%=;\n\t" + "LOOP filter_mid_inner%= LC1=P3;\n\t" + "LOOP_BEGIN filter_mid_inner%=;\n\t" + "A1 -= R4.H*R5.H, A0 += R4.L*R5.L (IS) || R4 = [I0++] || R5 = [I2--];\n\t" + "LOOP_END filter_mid_inner%=;\n\t" + "R0 = (A0 += A1) || I2 += M0;\n\t" + "R0 = R0 << 3 || R5 = W[P0++];\n\t" /* load x */ + "R0.L = R0 (RND);\n\t" + "R0.L = R0.L + R5.L;\n\t" + "R5 = PACK(R0.L, R5.L) || W[P1++] = R0;\n\t" /* shift y | store y */ + "A1 = A0 = 0 || [I2--] = R5\n\t" + "LOOP_END filter_mid%=;\n\t" + "I2 += 4;\n\t" + "P2 = I2;\n\t" + /* Update memory */ + "P4 = %6;\n\t" + "R0 = %5;\n\t" + "LC0 = R0;\n\t" + "P0 = B0;\n\t" + "A1 = A0 = 0;\n\t" + "LOOP mem_update%= LC0;\n\t" + "LOOP_BEGIN mem_update%=;\n\t" + "I2 = P2;\n\t" + "I0 = P0;\n\t" + "P0 += 4;\n\t" + "R0 = LC0;\n\t" + "LC1 = R0;\n\t" + "R5 = [I2--] || R4 = [I0++];\n\t" + "LOOP mem_accum%= LC1;\n\t" + "LOOP_BEGIN mem_accum%=;\n\t" + "A1 -= R4.H*R5.H, A0 += R4.L*R5.L (IS) || R4 = [I0++] || R5 = [I2--];\n\t" + "LOOP_END mem_accum%=;\n\t" + "R0 = (A0 += A1);\n\t" + "A1 = A0 = 0 || [P4++] = R0;\n\t" + "LOOP_END mem_update%=;\n\t" + "L0 = 0;\n\t" + : : "m" (xy), "m" (_x), "m" (_y), "m" (numden), "m" (N), "m" (ord), "m" (mem) + : "A0", "A1", "R0", "R1", "R2", "R3", "R4", "R5", "P0", "P1", "P2", "P3", "P4", "B0", "I0", "I2", "L0", "L2", "M0", "memory" + ); + +} + + + +#define OVERRIDE_IIR_MEM16 +void iir_mem16(const spx_word16_t *_x, const spx_coef_t *den, spx_word16_t *_y, int N, int ord, spx_mem_t *mem, char *stack) +{ + VARDECL(spx_word16_t *y); + spx_word16_t *yy; + + ALLOC(y, (N+2), spx_word16_t); + yy = y+2; + + __asm__ __volatile__ + ( + /* Register setup */ + "R0 = %5;\n\t" /*ord */ + + "P1 = %3;\n\t" + "I1 = P1;\n\t" + "B1 = P1;\n\t" + "L1 = 0;\n\t" + + "P3 = %0;\n\t" + "I3 = P3;\n\t" + "L3 = 0;\n\t" + + "P4 = %6;\n\t" + "P0 = %1;\n\t" + "P1 = %2;\n\t" + + /* First sample */ + "R1 = [P4++];\n\t" + "R1 = R1 << 3 (S);\n\t" + "R1.L = R1 (RND);\n\t" + "R2 = W[P0++];\n\t" + "R1 = R1 + R2;\n\t" + "W[P1++] = R1;\n\t" + "W[P3] = R1;\n\t" + + /* Samples 1 to ord-1 (using memory) */ + "R0 += -1;\n\t" + "R3 = 0;\n\t" + "LC0 = R0;\n\t" + "LOOP filter_start%= LC0;\n\t" + "LOOP_BEGIN filter_start%=;\n\t" + "R3 += 1;\n\t" + "LC1 = R3;\n\t" + + "R1 = [P4++];\n\t" + "A1 = R1;\n\t" + "I1 = B1;\n\t" + "I3 = P3;\n\t" + "P3 += 2;\n\t" + "LOOP filter_start_inner%= LC1;\n\t" + "LOOP_BEGIN filter_start_inner%=;\n\t" + "R4.L = W[I1++];\n\t" + "R5.L = W[I3--];\n\t" + "A1 -= R4.L*R5.L (IS);\n\t" + "LOOP_END filter_start_inner%=;\n\t" + + "R1 = A1;\n\t" + "R1 <<= 3;\n\t" + "R1.L = R1 (RND);\n\t" + "R2 = W[P0++];\n\t" + "R1 = R1 + R2;\n\t" + "W[P1++] = R1;\n\t" + "W[P3] = R1;\n\t" + "LOOP_END filter_start%=;\n\t" + + /* Samples ord to N*/ + "R0 = %5;\n\t" + "R0 <<= 1;\n\t" + "I1 = B1;\n\t" + "L1 = R0;\n\t" + + "R0 = %5;\n\t" + "R2 = %4;\n\t" + "R2 = R2 - R0;\n\t" + "R4.L = W[I1++];\n\t" + "LC0 = R2;\n\t" + "LOOP filter_mid%= LC0;\n\t" + "LOOP_BEGIN filter_mid%=;\n\t" + "LC1 = R0;\n\t" + "A1 = 0;\n\t" + "I3 = P3;\n\t" + "P3 += 2;\n\t" + "R5.L = W[I3--];\n\t" + "LOOP filter_mid_inner%= LC1;\n\t" + "LOOP_BEGIN filter_mid_inner%=;\n\t" + "A1 -= R4.L*R5.L (IS) || R4.L = W[I1++] || R5.L = W[I3--];\n\t" + "LOOP_END filter_mid_inner%=;\n\t" + "R1 = A1;\n\t" + "R1 = R1 << 3 || R2 = W[P0++];\n\t" + "R1.L = R1 (RND);\n\t" + "R1 = R1 + R2;\n\t" + "W[P1++] = R1;\n\t" + "W[P3] = R1;\n\t" + "LOOP_END filter_mid%=;\n\t" + + /* Update memory */ + "P4 = %6;\n\t" + "R0 = %5;\n\t" + "LC0 = R0;\n\t" + "P1 = B1;\n\t" + "LOOP mem_update%= LC0;\n\t" + "LOOP_BEGIN mem_update%=;\n\t" + "A0 = 0;\n\t" + "I3 = P3;\n\t" + "I1 = P1;\n\t" + "P1 += 2;\n\t" + "R0 = LC0;\n\t" + "LC1=R0;\n\t" + "R5.L = W[I3--] || R4.L = W[I1++];\n\t" + "LOOP mem_accum%= LC1;\n\t" + "LOOP_BEGIN mem_accum%=;\n\t" + "A0 -= R4.L*R5.L (IS) || R4.L = W[I1++] || R5.L = W[I3--];\n\t" + "LOOP_END mem_accum%=;\n\t" + "R0 = A0;\n\t" + "[P4++] = R0;\n\t" + "LOOP_END mem_update%=;\n\t" + "L1 = 0;\n\t" + : : "m" (yy), "m" (_x), "m" (_y), "m" (den), "m" (N), "m" (ord), "m" (mem) + : "A0", "A1", "R0", "R1", "R2", "R3", "R4", "R5", "P0", "P1", "P2", "P3", "P4", "B1", "I1", "I3", "L1", "L3", "memory" + ); + +} + + +#define OVERRIDE_FIR_MEM16 +void fir_mem16(const spx_word16_t *x, const spx_coef_t *num, spx_word16_t *y, int N, int ord, spx_mem_t *mem, char *stack) +{ + int i; + spx_coef_t den2[12]; + spx_coef_t *den; + den = (spx_coef_t*)((((int)den2)+4)&0xfffffffc); + for (i=0;i<10;i++) + den[i] = 0; + filter_mem16(x, num, den, y, N, ord, mem, stack); +} + + +#define OVERRIDE_COMPUTE_IMPULSE_RESPONSE +void compute_impulse_response(const spx_coef_t *ak, const spx_coef_t *awk1, const spx_coef_t *awk2, spx_word16_t *y, int N, int ord, char *stack) +{ + int i; + VARDECL(spx_word16_t *ytmp); + ALLOC(ytmp, N, spx_word16_t); + spx_word16_t *ytmp2 = ytmp; + y[0] = LPC_SCALING; + for (i=0;i<ord;i++) + y[i+1] = awk1[i]; + i++; + for (;i<N;i++) + y[i] = 0; + + N-=1; + __asm__ __volatile__ + ( + "I0 = %0;\n\t" + "I1 = %1;\n\t" + "L0 = 0;\n\t" + "L1 = 0;\n\t" + "L2 = 0;\n\t" + "L3 = 0;\n\t" + "R0 = 1;\n\t" + "R0 <<= 13;\n\t" + "W[I0] = R0.L;\n\t" + "R0 <<= 1;\n\t" + "W[I1] = R0.L;\n\t" + "R0 = %5;\n\t" + "LC0 = R0;\n\t" + "R2 = 0;\n\t" + "LOOP samples%= LC0;\n\t" + "LOOP_BEGIN samples%=;\n\t" + "R2 += 1;\n\t" + "R2 = MIN(R2, %4);\n\t" + "I0 = %0;\n\t" + "I1 = %1;\n\t" + "I2 = %2;\n\t" + "I3 = %3;\n\t" + "%0 += 2;\n\t" + "%1 += 2;\n\t" + "A1 = A0 = 0;\n\t" + "R0.L = W[I0--] || R1.L = W[I2++];\n\t" + "LC1 = R2;\n\t" + "LOOP filter%= LC1;\n\t" + "LOOP_BEGIN filter%=;\n\t" + "A0 -= R0.L*R1.L (IS) || R0.L = W[I1--] || R1.L = W[I3++];\n\t" + "A1 -= R0.L*R1.L (IS) || R0.L = W[I0--] || R1.L = W[I2++];\n\t" + "LOOP_END filter%=;\n\t" + "R0 = A0, R1 = A1;\n\t" + "R3 = W[%1] (X);\n\t" + "R3 <<= 13;\n\t" + "R0 = R0 + R3;\n\t" + "R3 = R0 >>> 13;\n\t" + "W[%0] = R3.L;\n\t" + "R0 <<= 1;\n\t" + "R1 = R1 + R0;\n\t" + "R1 >>>= 13;\n\t" + "W[%1] = R1.L;\n\t" + "LOOP_END samples%=;\n\t" + : "=a" (ytmp2), "=a" (y) + : "a" (awk2), "a" (ak), "d" (ord), "m" (N), "0" (ytmp2), "1" (y) + : "A0", "A1", "R0", "R1", "R2", "R3", "I0", "I1", "I2", "I3", "L0", "L1", "L2", "L3", "A0", "A1" + ); +} + + + +#if 0 /* Equivalent C function for filter_mem2 and compute_impulse_response */ +#define min(a,b) ((a)<(b) ? (a):(b)) + +void compute_impulse_response(const spx_coef_t *ak, const spx_coef_t *awk1, const spx_coef_t *awk2, spx_word16_t *y, int N, int ord, char *stack) +{ + int i,j; + VARDECL(spx_word16_t *ytmp); + ALLOC(ytmp, N, spx_word16_t); + + y[0] = LPC_SCALING; + for (i=0;i<ord;i++) + y[i+1] = awk1[i]; + i++; + for (;i<N;i++) + y[i] = 0; + + for (i=0;i<N;i++) + { + spx_word32_t yi = SHL32(EXTEND32(y[i]),LPC_SHIFT); + spx_word32_t yi2 = 0; + for (j=0;j<min(i,ord);j++) + { + yi = MAC16_16(yi, awk2[j], -ytmp[i-j-1]); + yi2 = MAC16_16(yi2, ak[j], -y[i-j-1]); + } + ytmp[i] = EXTRACT16(SHR32(yi,LPC_SHIFT)); + yi2 = ADD32(yi2,SHL32(yi,1)); + y[i] = EXTRACT16(SHR32(yi2,LPC_SHIFT)); + } + +} + + +void filter_mem2(const spx_sig_t *_x, const spx_coef_t *num, const spx_coef_t *den, spx_sig_t *_y, int N, int ord, spx_mem_t *mem) +{ + int i,j; + spx_word16_t xi,yi,nyi; + spx_word16_t x[N],y[N]; + spx_word16_t *xx, *yy; + xx = x; + yy = y; + for (i=0;i<N;i++) + { + x[i] = EXTRACT16(SHR32(_x[i],SIG_SHIFT)); + } + + for (i=0;i<ord;i++) + { + spx_word32_t yi = mem[i]; + for (j=0;j<i;j++) + { + yi = MAC16_16(yi, num[j], x[i-j-1]); + yi = MAC16_16(yi, den[j], -y[i-j-1]); + } + _y[i] = ADD32(_x[i],SHL32(yi,1)); + y[i] = EXTRACT16(SHR32(_y[i],SIG_SHIFT)); + } + for (i=ord;i<N;i++) + { + spx_word32_t yi = 0; + for (j=0;j<ord;j++) + { + yi = MAC16_16(yi, num[j], x[i-j-1]); + yi = MAC16_16(yi, den[j], -y[i-j-1]); + } + _y[i] = ADD32(_x[i],SHL32(yi,1)); + y[i] = EXTRACT16(SHR32(_y[i],SIG_SHIFT)); + } + + for (i=0;i<ord;i++) + { + spx_mem_t m = 0; + for (j=0;j<ord-i;j++) + { + m = MAC16_16(m, x[N-1-j], num[j+i]); + m = MAC16_16(m, -y[N-1-j], den[j+i]); + } + mem[i] = m; + } +} +#endif |