Moving src/webrtc into src/.

In order to eliminate the WebRTC Subtree mirror in Chromium, 
WebRTC is moving the content of the src/webrtc directory up
to the src/ directory.

NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
TBR=tommi@webrtc.org

Bug: chromium:611808
Change-Id: Iac59c5b51b950f174119565bac87955a7994bc38
Reviewed-on: https://webrtc-review.googlesource.com/1560
Commit-Queue: Mirko Bonadei <mbonadei@webrtc.org>
Reviewed-by: Henrik Kjellander <kjellander@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#19845}

modules/audio_coding/codecs/ilbc/get_cd_vec.c

@@ -0,0 +1,126 @@
+/*
+ *  Copyright (c) 2011 The WebRTC project authors. All Rights Reserved.
+ *
+ *  Use of this source code is governed by a BSD-style license
+ *  that can be found in the LICENSE file in the root of the source
+ *  tree. An additional intellectual property rights grant can be found
+ *  in the file PATENTS.  All contributing project authors may
+ *  be found in the AUTHORS file in the root of the source tree.
+ */
+
+/******************************************************************
+
+ iLBC Speech Coder ANSI-C Source Code
+
+ WebRtcIlbcfix_GetCbVec.c
+
+******************************************************************/
+
+#include "get_cd_vec.h"
+
+#include "defines.h"
+#include "constants.h"
+#include "create_augmented_vec.h"
+
+/*----------------------------------------------------------------*
+ *  Construct codebook vector for given index.
+ *---------------------------------------------------------------*/
+
+bool WebRtcIlbcfix_GetCbVec(
+    int16_t *cbvec,   /* (o) Constructed codebook vector */
+    int16_t *mem,   /* (i) Codebook buffer */
+    size_t index,   /* (i) Codebook index */
+    size_t lMem,   /* (i) Length of codebook buffer */
+    size_t cbveclen   /* (i) Codebook vector length */
+                            ){
+  size_t k, base_size;
+  size_t lag;
+  /* Stack based */
+  int16_t tempbuff2[SUBL+5];
+
+  /* Determine size of codebook sections */
+
+  base_size=lMem-cbveclen+1;
+
+  if (cbveclen==SUBL) {
+    base_size += cbveclen / 2;
+  }
+
+  /* No filter -> First codebook section */
+
+  if (index<lMem-cbveclen+1) {
+
+    /* first non-interpolated vectors */
+
+    k=index+cbveclen;
+    /* get vector */
+    WEBRTC_SPL_MEMCPY_W16(cbvec, mem+lMem-k, cbveclen);
+
+  } else if (index < base_size) {
+
+    /* Calculate lag */
+
+    k = (2 * (index - (lMem - cbveclen + 1))) + cbveclen;
+
+    lag = k / 2;
+
+    WebRtcIlbcfix_CreateAugmentedVec(lag, mem+lMem, cbvec);
+
+  }
+
+  /* Higher codebbok section based on filtering */
+
+  else {
+
+    size_t memIndTest;
+
+    /* first non-interpolated vectors */
+
+    if (index-base_size<lMem-cbveclen+1) {
+
+      /* Set up filter memory, stuff zeros outside memory buffer */
+
+      memIndTest = lMem-(index-base_size+cbveclen);
+
+      WebRtcSpl_MemSetW16(mem-CB_HALFFILTERLEN, 0, CB_HALFFILTERLEN);
+      WebRtcSpl_MemSetW16(mem+lMem, 0, CB_HALFFILTERLEN);
+
+      /* do filtering to get the codebook vector */
+
+      WebRtcSpl_FilterMAFastQ12(
+          &mem[memIndTest+4], cbvec, (int16_t*)WebRtcIlbcfix_kCbFiltersRev,
+          CB_FILTERLEN, cbveclen);
+    }
+
+    /* interpolated vectors */
+
+    else {
+      if (cbveclen < SUBL) {
+        // We're going to fill in cbveclen + 5 elements of tempbuff2 in
+        // WebRtcSpl_FilterMAFastQ12, less than the SUBL + 5 elements we'll be
+        // using in WebRtcIlbcfix_CreateAugmentedVec. This error is caused by
+        // bad values in |index| (which come from the encoded stream). Tell the
+        // caller that things went south, and that the decoder state is now
+        // corrupt (because it's half-way through an update that we can't
+        // complete).
+        return false;
+      }
+
+      /* Stuff zeros outside memory buffer  */
+      memIndTest = lMem-cbveclen-CB_FILTERLEN;
+      WebRtcSpl_MemSetW16(mem+lMem, 0, CB_HALFFILTERLEN);
+
+      /* do filtering */
+      WebRtcSpl_FilterMAFastQ12(
+          &mem[memIndTest+7], tempbuff2, (int16_t*)WebRtcIlbcfix_kCbFiltersRev,
+          CB_FILTERLEN, cbveclen+5);
+
+      /* Calculate lag index */
+      lag = (cbveclen<<1)-20+index-base_size-lMem-1;
+
+      WebRtcIlbcfix_CreateAugmentedVec(lag, tempbuff2+SUBL+5, cbvec);
+    }
+  }
+
+  return true;  // Success.
+}