AudioEncoder subclass for iSACfix

This patch refactors AudioEncoderDecoderIsac so that it can share
almost all code with the very similar AudioEncoderDecoderIsacFix.

BUG=3926
R=henrik.lundin@webrtc.org, kjellander@webrtc.org

Review URL: https://webrtc-codereview.appspot.com/29259004

git-svn-id: http://webrtc.googlecode.com/svn/trunk@7912 4adac7df-926f-26a2-2b94-8c16560cd09d

webrtc/modules/audio_coding/codecs/isac/fix/source/audio_encoder_isacfix.cc

@@ -0,0 +1,23 @@
+/*
+ *  Copyright (c) 2014 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.
+ */
+
+#include "webrtc/modules/audio_coding/codecs/isac/fix/interface/audio_encoder_isacfix.h"
+
+#include "webrtc/modules/audio_coding/codecs/isac/audio_encoder_isac_t_impl.h"
+
+namespace webrtc {
+
+const uint16_t IsacFix::kFixSampleRate;
+
+// Explicit instantiation of AudioEncoderDecoderIsacT<IsacFix>, a.k.a.
+// AudioEncoderDecoderIsacFix.
+template class AudioEncoderDecoderIsacT<IsacFix>;
+
+}  // namespace webrtc

webrtc/modules/audio_coding/codecs/isac/fix/source/isacfix.gypi

@@ -26,10 +26,14 @@
         ],
       },
       'sources': [
+        '../../audio_encoder_isac_t.h',
+        '../../audio_encoder_isac_t_impl.h',
+        '../interface/audio_encoder_isacfix.h',
         '../interface/isacfix.h',
         'arith_routines.c',
         'arith_routines_hist.c',
         'arith_routines_logist.c',
+        'audio_encoder_isacfix.cc',
         'bandwidth_estimator.c',
         'decode.c',
         'decode_bwe.c',