GODOT IS OPEN SOURCE

1 files changed, 187 insertions, 0 deletions

diff --git a/drivers/speex/ltp_arm4.h b/drivers/speex/ltp_arm4.h
new file mode 100644
index 0000000000..cdb94e603a
--- /dev/null
+++ b/drivers/speex/ltp_arm4.h
@@ -0,0 +1,187 @@
+/* Copyright (C) 2004 Jean-Marc Valin */
+/**
+   @file ltp_arm4.h
+   @brief Long-Term Prediction functions (ARM4 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 sum1=0,sum2=0;
+   spx_word16_t *deadx, *deady;
+   int deadlen, dead1, dead2, dead3, dead4, dead5, dead6;
+   __asm__ __volatile__ (
+         "\tldrsh %5, [%0], #2 \n"
+         "\tldrsh %6, [%1], #2 \n"
+         ".inner_prod_loop%=:\n"
+         "\tsub %7, %7, %7\n"
+         "\tsub %10, %10, %10\n"
+
+         "\tldrsh %8, [%0], #2 \n"
+         "\tldrsh %9, [%1], #2 \n"
+         "\tmla %7, %5, %6, %7\n"
+         "\tldrsh %5, [%0], #2 \n"
+         "\tldrsh %6, [%1], #2 \n"
+         "\tmla %10, %8, %9, %10\n"
+         "\tldrsh %8, [%0], #2 \n"
+         "\tldrsh %9, [%1], #2 \n"
+         "\tmla %7, %5, %6, %7\n"
+         "\tldrsh %5, [%0], #2 \n"
+         "\tldrsh %6, [%1], #2 \n"
+         "\tmla %10, %8, %9, %10\n"
+
+         "\tldrsh %8, [%0], #2 \n"
+         "\tldrsh %9, [%1], #2 \n"
+         "\tmla %7, %5, %6, %7\n"
+         "\tldrsh %5, [%0], #2 \n"
+         "\tldrsh %6, [%1], #2 \n"
+         "\tmla %10, %8, %9, %10\n"
+         "\tldrsh %8, [%0], #2 \n"
+         "\tldrsh %9, [%1], #2 \n"
+         "\tmla %7, %5, %6, %7\n"
+         "\tldrsh %5, [%0], #2 \n"
+         "\tldrsh %6, [%1], #2 \n"
+         "\tmla %10, %8, %9, %10\n"
+
+         "\tsubs %4, %4, #1\n"
+         "\tadd %2, %2, %7, asr #5\n"
+         "\tadd %3, %3, %10, asr #5\n"
+         "\tbne .inner_prod_loop%=\n"
+   : "=r" (deadx), "=r" (deady), "+r" (sum1),  "+r" (sum2),
+     "=r" (deadlen), "=r" (dead1), "=r" (dead2), "=r" (dead3),
+     "=r" (dead4), "=r" (dead5), "=r" (dead6)
+   : "0" (x), "1" (y), "4" (len>>3)
+   : "cc"
+                        );
+   return (sum1+sum2)>>1;
+}
+
+#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)
+{
+   int i,j;
+   for (i=0;i<nb_pitch;i+=4)
+   {
+      /* Compute correlation*/
+      //corr[nb_pitch-1-i]=inner_prod(x, _y+i, len);
+      spx_word32_t sum1=0;
+      spx_word32_t sum2=0;
+      spx_word32_t sum3=0;
+      spx_word32_t sum4=0;
+      const spx_word16_t *y = _y+i;
+      const spx_word16_t *x = _x;
+      spx_word32_t y0, y1, y2, y3;
+      y0=*y++;
+      y1=*y++;
+      y2=*y++;
+      y3=*y++;
+      for (j=0;j<len;j+=4)
+      {
+         spx_word32_t part1, part2, part3, part4, x0;
+         spx_word32_t dead1;
+         __asm__ __volatile__ (
+#ifdef SHORTCUTS
+               "\tldrsh %10, [%8], #4 \n"
+               "\tmul %4, %10, %0 \n"
+               "\tldrsh %15, [%8], #4 \n"
+               "\tmul %5, %10, %1 \n"
+               "\tldrsh %0, [%9], #2 \n"
+               "\tmul %6, %10, %2 \n"
+               "\tldrsh %1, [%9], #2 \n"
+               "\tmul %7, %10, %3 \n"
+               
+               
+               "\tmla %4, %15, %2, %4 \n"
+               "\tldrsh %2, [%9], #2 \n"
+               "\tmla %5, %15, %3, %5 \n"
+               "\tldrsh %3, [%9], #2 \n"
+               "\tmla %6, %15, %0, %6 \n"
+               "\tmla %7, %15, %1, %7 \n"
+
+#else
+               "\tldrsh %10, [%8], #2 \n"
+               "\tmul %4, %10, %0 \n"
+               "\tmul %5, %10, %1 \n"
+               "\tmul %6, %10, %2 \n"
+               "\tmul %7, %10, %3 \n"
+
+               "\tldrsh %10, [%8], #2 \n"
+               "\tldrsh %0, [%9], #2 \n"
+               "\tmla %4, %10, %1, %4 \n"
+               "\tmla %5, %10, %2, %5 \n"
+               "\tmla %6, %10, %3, %6 \n"
+               "\tmla %7, %10, %0, %7 \n"
+
+               "\tldrsh %10, [%8], #2 \n"
+               "\tldrsh %1, [%9], #2 \n"
+               "\tmla %4, %10, %2, %4 \n"
+               "\tmla %5, %10, %3, %5 \n"
+               "\tmla %6, %10, %0, %6 \n"
+               "\tmla %7, %10, %1, %7 \n"
+
+               "\tldrsh %10, [%8], #2 \n"
+               "\tldrsh %2, [%9], #2 \n"
+               "\tmla %4, %10, %3, %4 \n"
+               "\tmla %5, %10, %0, %5 \n"
+               "\tmla %6, %10, %1, %6 \n"
+               "\tmla %7, %10, %2, %7 \n"
+
+               "\tldrsh %3, [%9], #2 \n"
+#endif
+
+               "\tldr %10, %11 \n"
+               "\tldr %15, %12 \n"
+               "\tadd %4, %10, %4, asr #6 \n"
+               "\tstr %4, %11 \n"
+               "\tldr %10, %13 \n"
+               "\tadd %5, %15, %5, asr #6 \n"
+               "\tstr %5, %12 \n"
+               "\tldr %15, %14 \n"
+               "\tadd %6, %10, %6, asr #6 \n"
+               "\tadd %7, %15, %7, asr #6 \n"
+               "\tstr %6, %13 \n"
+               "\tstr %7, %14 \n"
+
+            : "+r" (y0), "+r" (y1), "+r" (y2), "+r" (y3),
+         "=r" (part1),  "=r" (part2),  "=r" (part3),  "=r" (part4),
+              "+r" (x), "+r" (y), "=r" (x0), "+m" (sum1),
+              "+m" (sum2), "+m" (sum3), "+m" (sum4), "=r" (dead1)
+            :
+            : "cc", "memory"
+                              );
+      }
+      corr[nb_pitch-1-i]=sum1;
+      corr[nb_pitch-2-i]=sum2;
+      corr[nb_pitch-3-i]=sum3;
+      corr[nb_pitch-4-i]=sum4;
+   }
+
+}