From f40bfc9267b13b54e6379dfe7539447662879d24 Mon Sep 17 00:00:00 2001
From: Sean Bartell <wingedtachikoma@gmail.com>
Date: Sat, 25 Jun 2011 21:32:25 -0400
Subject: Add codecs to librbcodec.
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Change-Id: Id7f4717d51ed02d67cb9f9cb3c0ada4a81843f97
Reviewed-on: http://gerrit.rockbox.org/137
Reviewed-by: Nils Wallménius <nils@rockbox.org>
Tested-by: Nils Wallménius <nils@rockbox.org>
---
 lib/rbcodec/codecs/libspeex/vq_arm4.h | 115 ++++++++++++++++++++++++++++++++++
 1 file changed, 115 insertions(+)
 create mode 100644 lib/rbcodec/codecs/libspeex/vq_arm4.h

(limited to 'lib/rbcodec/codecs/libspeex/vq_arm4.h')

diff --git a/lib/rbcodec/codecs/libspeex/vq_arm4.h b/lib/rbcodec/codecs/libspeex/vq_arm4.h
new file mode 100644
index 0000000000..d2697e5784
--- /dev/null
+++ b/lib/rbcodec/codecs/libspeex/vq_arm4.h
@@ -0,0 +1,115 @@
+/* Copyright (C) 2004 Jean-Marc Valin */
+/**
+   @file vq_arm4.h
+   @brief ARM4-optimized vq routine
+*/
+/*
+   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_VQ_NBEST
+void vq_nbest(spx_word16_t *in, const spx_word16_t *codebook, int len, int entries, spx_word32_t *E, int N, int *nbest, spx_word32_t *best_dist, char *stack)
+{
+   int i,j;
+   for (i=0;i<entries;i+=4)
+   {
+#if 1
+      spx_word32_t dist1, dist2, dist3, dist4;
+      int dead1, dead2, dead3, dead4, dead5, dead6, dead7, dead8;
+      __asm__ __volatile__ (
+            "mov %0, #0 \n\t"
+            "mov %1, #0 \n\t"
+            "mov %2, #0 \n\t"
+            "mov %3, #0 \n\t"
+            "mov %10, %4 \n\t"
+            "add %4, %4, %4\n\t"
+            ".vqloop%=:\n\t"
+            "ldrsh %7, [%5], #2 \n\t"
+            "ldrsh %8, [%6] \n\t"
+            "mov %9, %6 \n\t"
+            "mla %0, %7, %8, %0 \n\t"
+            "ldrsh %8, [%9, %4]! \n\t"
+            "mla %1, %7, %8, %1 \n\t"
+            "ldrsh %8, [%9, %4]!\n\t"
+            "mla %2, %7, %8, %2 \n\t"
+            "ldrsh %8, [%9, %4]! \n\t"
+            "mla %3, %7, %8, %3 \n\t"
+            "subs %10, %10, #1 \n\t"
+            "add %6, %6, #2 \n\t"
+            "bne .vqloop%="
+         : "=r" (dist1), "=r" (dist2), "=r" (dist3), "=r" (dist4),
+      "=r" (dead1), "=r" (dead2), "=r" (codebook), "=r" (dead4),
+      "=r" (dead5), "=r" (dead6), "=r" (dead7)
+         : "4" (len), "5" (in), "6" (codebook)
+         : "cc", "memory");
+#else
+dist1=dist2=dist3=dist4=0;
+   /*   spx_word32_t dist1=0;
+      spx_word32_t dist2=0;
+      spx_word32_t dist3=0;
+      spx_word32_t dist4=0;*/
+      for (j=0;j<2;j++)
+      {
+         const spx_word16_t *code = codebook;
+         dist1 = MAC16_16(dist1,in[j],*code);
+         code += len;
+         dist2 = MAC16_16(dist2,in[j],*code);
+         code += len;
+         dist3 = MAC16_16(dist3,in[j],*code);
+         code += len;
+         dist4 = MAC16_16(dist4,in[j],*code);
+         codebook++;
+      }
+#endif
+      dist1=SUB32(SHR(*E++,1),dist1);
+      if (dist1<*best_dist || i==0)
+      {
+         *best_dist=dist1;
+         *nbest=i;
+      }
+      dist2=SUB32(SHR(*E++,1),dist2);
+      if (dist2<*best_dist)
+      {
+         *best_dist=dist2;
+         *nbest=i+1;
+      }
+      dist3=SUB32(SHR(*E++,1),dist3);
+      if (dist3<*best_dist)
+      {
+         *best_dist=dist3;
+         *nbest=i+2;
+      }
+      dist4=SUB32(SHR(*E++,1),dist4);
+      if (dist4<*best_dist)
+      {
+         *best_dist=dist4;
+         *nbest=i+3;
+      }
+      codebook += 3*len;
+   }
+}
-- 
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