summaryrefslogtreecommitdiff
path: root/src/libspeex/ltp_bfin.h
diff options
context:
space:
mode:
Diffstat (limited to 'src/libspeex/ltp_bfin.h')
-rw-r--r--src/libspeex/ltp_bfin.h419
1 files changed, 419 insertions, 0 deletions
diff --git a/src/libspeex/ltp_bfin.h b/src/libspeex/ltp_bfin.h
new file mode 100644
index 0000000..b530f85
--- /dev/null
+++ b/src/libspeex/ltp_bfin.h
@@ -0,0 +1,419 @@
+/* Copyright (C) 2005 Analog Devices */
+/**
+ @file ltp_bfin.h
+ @author Jean-Marc Valin
+ @brief Long-Term Prediction functions (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_INNER_PROD
+spx_word32_t inner_prod(const spx_word16_t *x, const spx_word16_t *y, int len)
+{
+ spx_word32_t sum=0;
+ __asm__ __volatile__ (
+ "P0 = %3;\n\t"
+ "P1 = %1;\n\t"
+ "P2 = %2;\n\t"
+ "I0 = P1;\n\t"
+ "I1 = P2;\n\t"
+ "L0 = 0;\n\t"
+ "L1 = 0;\n\t"
+ "A0 = 0;\n\t"
+ "R0.L = W[I0++] || R1.L = W[I1++];\n\t"
+ "LOOP inner%= LC0 = P0;\n\t"
+ "LOOP_BEGIN inner%=;\n\t"
+ "A0 += R0.L*R1.L (IS) || R0.L = W[I0++] || R1.L = W[I1++];\n\t"
+ "LOOP_END inner%=;\n\t"
+ "A0 += R0.L*R1.L (IS);\n\t"
+ "A0 = A0 >>> 6;\n\t"
+ "R0 = A0;\n\t"
+ "%0 = R0;\n\t"
+ : "=m" (sum)
+ : "m" (x), "m" (y), "d" (len-1)
+ : "P0", "P1", "P2", "R0", "R1", "A0", "I0", "I1", "L0", "L1", "R3"
+ );
+ return sum;
+}
+
+#define OVERRIDE_PITCH_XCORR
+void pitch_xcorr(const spx_word16_t *_x, const spx_word16_t *_y, spx_word32_t *corr, int len, int nb_pitch, char *stack)
+{
+ corr += nb_pitch - 1;
+ __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"
+ "P3 += -2;\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"
+ "L1 = 0;\n\t" /*Disable looping on I1*/
+
+ "r0 = [I0++];\n\t"
+ "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"
+ "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) || R0 = [I0++];\n\t"
+ "A0 = A0 >>> 6;\n\t"
+ "A1 = A1 >>> 6;\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"
+ "L0 = 0;\n\t"
+ : : "m" (_x), "m" (_y), "m" (corr), "m" (len), "m" (nb_pitch)
+ : "A0", "A1", "P0", "P1", "P2", "P3", "P4", "R0", "R1", "R2", "R3", "I0", "I1", "L0", "L1", "B0", "B1", "memory"
+ );
+}
+
+#define OVERRIDE_COMPUTE_PITCH_ERROR
+static inline spx_word32_t compute_pitch_error(spx_word16_t *C, spx_word16_t *g, spx_word16_t pitch_control)
+{
+ spx_word32_t sum;
+ __asm__ __volatile__
+ (
+ "A0 = 0;\n\t"
+
+ "R0 = W[%1++];\n\t"
+ "R1.L = %2.L*%5.L (IS);\n\t"
+ "A0 += R1.L*R0.L (IS) || R0 = W[%1++];\n\t"
+
+ "R1.L = %3.L*%5.L (IS);\n\t"
+ "A0 += R1.L*R0.L (IS) || R0 = W[%1++];\n\t"
+
+ "R1.L = %4.L*%5.L (IS);\n\t"
+ "A0 += R1.L*R0.L (IS) || R0 = W[%1++];\n\t"
+
+ "R1.L = %2.L*%3.L (IS);\n\t"
+ "A0 -= R1.L*R0.L (IS) || R0 = W[%1++];\n\t"
+
+ "R1.L = %4.L*%3.L (IS);\n\t"
+ "A0 -= R1.L*R0.L (IS) || R0 = W[%1++];\n\t"
+
+ "R1.L = %4.L*%2.L (IS);\n\t"
+ "A0 -= R1.L*R0.L (IS) || R0 = W[%1++];\n\t"
+
+ "R1.L = %2.L*%2.L (IS);\n\t"
+ "A0 -= R1.L*R0.L (IS) || R0 = W[%1++];\n\t"
+
+ "R1.L = %3.L*%3.L (IS);\n\t"
+ "A0 -= R1.L*R0.L (IS) || R0 = W[%1++];\n\t"
+
+ "R1.L = %4.L*%4.L (IS);\n\t"
+ "A0 -= R1.L*R0.L (IS);\n\t"
+
+ "%0 = A0;\n\t"
+ : "=&D" (sum), "=a" (C)
+ : "d" (g[0]), "d" (g[1]), "d" (g[2]), "d" (pitch_control), "1" (C)
+ : "R0", "R1", "R2", "A0"
+ );
+ return sum;
+}
+
+#define OVERRIDE_OPEN_LOOP_NBEST_PITCH
+#ifdef OVERRIDE_OPEN_LOOP_NBEST_PITCH
+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)
+{
+ int i,j,k;
+ VARDECL(spx_word32_t *best_score);
+ VARDECL(spx_word32_t *best_ener);
+ spx_word32_t e0;
+ VARDECL(spx_word32_t *corr);
+ VARDECL(spx_word32_t *energy);
+
+ ALLOC(best_score, N, spx_word32_t);
+ ALLOC(best_ener, N, spx_word32_t);
+ ALLOC(corr, end-start+1, spx_word32_t);
+ ALLOC(energy, end-start+2, spx_word32_t);
+
+ for (i=0;i<N;i++)
+ {
+ best_score[i]=-1;
+ best_ener[i]=0;
+ pitch[i]=start;
+ }
+
+ energy[0]=inner_prod(sw-start, sw-start, len);
+ e0=inner_prod(sw, sw, len);
+
+ /* energy update -------------------------------------*/
+
+ __asm__ __volatile__
+ (
+" P0 = %0;\n\t"
+" I1 = %1;\n\t"
+" L1 = 0;\n\t"
+" I2 = %2;\n\t"
+" L2 = 0;\n\t"
+" R2 = [P0++];\n\t"
+" R3 = 0;\n\t"
+" LSETUP (eu1, eu2) LC1 = %3;\n\t"
+"eu1: R1.L = W [I1--] || R0.L = W [I2--] ;\n\t"
+" R1 = R1.L * R1.L (IS);\n\t"
+" R0 = R0.L * R0.L (IS);\n\t"
+" R1 >>>= 6;\n\t"
+" R1 = R1 + R2;\n\t"
+" R0 >>>= 6;\n\t"
+" R1 = R1 - R0;\n\t"
+" R2 = MAX(R1,R3);\n\t"
+"eu2: [P0++] = R2;\n\t"
+ : : "d" (energy), "d" (&sw[-start-1]), "d" (&sw[-start+len-1]),
+ "a" (end-start)
+ : "P0", "I1", "I2", "R0", "R1", "R2", "R3"
+#if (__GNUC__ == 4)
+ , "LC1"
+#endif
+ );
+
+ pitch_xcorr(sw, sw-end, corr, len, end-start+1, stack);
+
+ /* FIXME: Fixed-point and floating-point code should be merged */
+ {
+ VARDECL(spx_word16_t *corr16);
+ VARDECL(spx_word16_t *ener16);
+ ALLOC(corr16, end-start+1, spx_word16_t);
+ ALLOC(ener16, end-start+1, spx_word16_t);
+ /* Normalize to 180 so we can square it and it still fits in 16 bits */
+ normalize16(corr, corr16, 180, end-start+1);
+ normalize16(energy, ener16, 180, end-start+1);
+
+ if (N == 1) {
+ /* optimised asm to handle N==1 case */
+ __asm__ __volatile__
+ (
+" I0 = %1;\n\t" /* I0: corr16[] */
+" L0 = 0;\n\t"
+" I1 = %2;\n\t" /* I1: energy */
+" L1 = 0;\n\t"
+" R2 = -1;\n\t" /* R2: best score */
+" R3 = 0;\n\t" /* R3: best energy */
+" P0 = %4;\n\t" /* P0: best pitch */
+" P1 = %4;\n\t" /* P1: counter */
+" LSETUP (sl1, sl2) LC1 = %3;\n\t"
+"sl1: R0.L = W [I0++] || R1.L = W [I1++];\n\t"
+" R0 = R0.L * R0.L (IS);\n\t"
+" R1 += 1;\n\t"
+" R4 = R0.L * R3.L;\n\t"
+" R5 = R2.L * R1.L;\n\t"
+" cc = R5 < R4;\n\t"
+" if cc R2 = R0;\n\t"
+" if cc R3 = R1;\n\t"
+" if cc P0 = P1;\n\t"
+"sl2: P1 += 1;\n\t"
+" %0 = P0;\n\t"
+ : "=&d" (pitch[0])
+ : "a" (corr16), "a" (ener16), "a" (end+1-start), "d" (start)
+ : "P0", "P1", "I0", "I1", "R0", "R1", "R2", "R3", "R4", "R5"
+#if (__GNUC__ == 4)
+ , "LC1"
+#endif
+ );
+
+ }
+ else {
+ for (i=start;i<=end;i++)
+ {
+ spx_word16_t tmp = MULT16_16_16(corr16[i-start],corr16[i-start]);
+ /* Instead of dividing the tmp by the energy, we multiply on the other side */
+ if (MULT16_16(tmp,best_ener[N-1])>MULT16_16(best_score[N-1],ADD16(1,ener16[i-start])))
+ {
+ /* We can safely put it last and then check */
+ best_score[N-1]=tmp;
+ best_ener[N-1]=ener16[i-start]+1;
+ pitch[N-1]=i;
+ /* Check if it comes in front of others */
+ for (j=0;j<N-1;j++)
+ {
+ if (MULT16_16(tmp,best_ener[j])>MULT16_16(best_score[j],ADD16(1,ener16[i-start])))
+ {
+ for (k=N-1;k>j;k--)
+ {
+ best_score[k]=best_score[k-1];
+ best_ener[k]=best_ener[k-1];
+ pitch[k]=pitch[k-1];
+ }
+ best_score[j]=tmp;
+ best_ener[j]=ener16[i-start]+1;
+ pitch[j]=i;
+ break;
+ }
+ }
+ }
+ }
+ }
+ }
+
+ /* Compute open-loop gain */
+ if (gain)
+ {
+ for (j=0;j<N;j++)
+ {
+ spx_word16_t g;
+ i=pitch[j];
+ g = DIV32(corr[i-start], 10+SHR32(MULT16_16(spx_sqrt(e0),spx_sqrt(energy[i-start])),6));
+ /* FIXME: g = max(g,corr/energy) */
+ if (g<0)
+ g = 0;
+ gain[j]=g;
+ }
+ }
+}
+#endif
+
+#define OVERRIDE_PITCH_GAIN_SEARCH_3TAP_VQ
+#ifdef OVERRIDE_PITCH_GAIN_SEARCH_3TAP_VQ
+static int pitch_gain_search_3tap_vq(
+ const signed char *gain_cdbk,
+ int gain_cdbk_size,
+ spx_word16_t *C16,
+ spx_word16_t max_gain
+)
+{
+ const signed char *ptr=gain_cdbk;
+ int best_cdbk=0;
+ spx_word32_t best_sum=-VERY_LARGE32;
+ spx_word32_t sum=0;
+ spx_word16_t g[3];
+ spx_word16_t pitch_control=64;
+ spx_word16_t gain_sum;
+ int i;
+
+ /* fast asm version of VQ codebook search */
+
+ __asm__ __volatile__
+ (
+
+" P0 = %2;\n\t" /* P0: ptr to gain_cdbk */
+" L1 = 0;\n\t" /* no circ addr for L1 */
+" %0 = 0;\n\t" /* %0: best_sum */
+" %1 = 0;\n\t" /* %1: best_cbdk */
+" P1 = 0;\n\t" /* P1: loop counter */
+
+" LSETUP (pgs1, pgs2) LC1 = %4;\n\t"
+"pgs1: R2 = B [P0++] (X);\n\t" /* R2: g[0] */
+" R3 = B [P0++] (X);\n\t" /* R3: g[1] */
+" R4 = B [P0++] (X);\n\t" /* R4: g[2] */
+" R2 += 32;\n\t"
+" R3 += 32;\n\t"
+" R4 += 32;\n\t"
+" R4.H = 64;\n\t" /* R4.H: pitch_control */
+
+" R0 = B [P0++] (X);\n\t"
+" B0 = R0;\n\t" /* BO: gain_sum */
+
+ /* compute_pitch_error() -------------------------------*/
+
+" I1 = %3;\n\t" /* I1: ptr to C */
+" A0 = 0;\n\t"
+
+" R0.L = W[I1++];\n\t"
+" R1.L = R2.L*R4.H (IS);\n\t"
+" A0 += R1.L*R0.L (IS) || R0.L = W[I1++];\n\t"
+
+" R1.L = R3.L*R4.H (IS);\n\t"
+" A0 += R1.L*R0.L (IS) || R0.L = W[I1++];\n\t"
+
+" R1.L = R4.L*R4.H (IS);\n\t"
+" A0 += R1.L*R0.L (IS) || R0.L = W[I1++];\n\t"
+
+" R1.L = R2.L*R3.L (IS);\n\t"
+" A0 -= R1.L*R0.L (IS) || R0.L = W[I1++];\n\t"
+
+" R1.L = R4.L*R3.L (IS);\n\t"
+" A0 -= R1.L*R0.L (IS) || R0.L = W[I1++];\n\t"
+
+" R1.L = R4.L*R2.L (IS);\n\t"
+" A0 -= R1.L*R0.L (IS) || R0.L = W[I1++];\n\t"
+
+" R1.L = R2.L*R2.L (IS);\n\t"
+" A0 -= R1.L*R0.L (IS) || R0.L = W[I1++];\n\t"
+
+" R1.L = R3.L*R3.L (IS);\n\t"
+" A0 -= R1.L*R0.L (IS) || R0.L = W[I1++];\n\t"
+
+" R1.L = R4.L*R4.L (IS);\n\t"
+" R0 = (A0 -= R1.L*R0.L) (IS);\n\t"
+
+/*
+ Re-arrange the if-then to code efficiently on the Blackfin:
+
+ if (sum>best_sum && gain_sum<=max_gain) ------ (1)
+
+ if (sum>best_sum && !(gain_sum>max_gain)) ------ (2)
+
+ if (max_gain<=gain_sum) { ------ (3)
+ sum = -VERY_LARGE32;
+ }
+ if (best_sum<=sum)
+
+ The blackin cc instructions are all of the form:
+
+ cc = x < y (or cc = x <= y)
+*/
+" R1 = B0\n\t"
+" R2 = %5\n\t"
+" R3 = %6\n\t"
+" 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", "P0",
+ "P1", "I1", "L1", "A0", "B0"
+#if (__GNUC__ == 4)
+ , "LC1"
+#endif
+ );
+
+ return best_cdbk;
+}
+#endif
+
generated by cgit (git 2.34.1) at 2024-11-14 23:07:42 +0000