iSAC: Make separate AudioEncoder and AudioDecoder objects

webrtc/modules/audio_coding/neteq/audio_decoder_impl.cc

 /*
  *  Copyright (c) 2012 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.
  */
 
@@ skipping 541 matching lines @@
       return new AudioDecoderPcmA;
     case kDecoderPCMu_2ch:
       return new AudioDecoderPcmUMultiCh(2);
     case kDecoderPCMa_2ch:
       return new AudioDecoderPcmAMultiCh(2);
 #ifdef WEBRTC_CODEC_ILBC
     case kDecoderILBC:
       return new AudioDecoderIlbc;
 #endif
 #if defined(WEBRTC_CODEC_ISACFX)
-    case kDecoderISAC: {
-      AudioEncoderDecoderIsacFix::Config config;
-      return new AudioEncoderDecoderIsacFix(config);
-    }
+    case kDecoderISAC:
+      return new AudioDecoderIsacFix();
 #elif defined(WEBRTC_CODEC_ISAC)
-    case kDecoderISAC: {
-      AudioEncoderDecoderIsac::Config config;
-      config.sample_rate_hz = 16000;
-      return new AudioEncoderDecoderIsac(config);
-    }
+    case kDecoderISAC:
     case kDecoderISACswb:
-    case kDecoderISACfb: {
-      AudioEncoderDecoderIsac::Config config;
-      config.sample_rate_hz = 32000;
-      return new AudioEncoderDecoderIsac(config);
-    }
+    case kDecoderISACfb:
+      return new AudioDecoderIsac();
 #endif
 #ifdef WEBRTC_CODEC_PCM16
     case kDecoderPCM16B:
     case kDecoderPCM16Bwb:
     case kDecoderPCM16Bswb32kHz:
     case kDecoderPCM16Bswb48kHz:
       return new AudioDecoderPcm16B;
     case kDecoderPCM16B_2ch:
     case kDecoderPCM16Bwb_2ch:
     case kDecoderPCM16Bswb32kHz_2ch:
@@ skipping 22 matching lines @@
     case kDecoderRED:
     case kDecoderAVT:
     case kDecoderArbitrary:
     default: {
       return NULL;
     }
   }
 }
 
 }  // namespace webrtc