Make an enum class out of NetEqDecoder, and hide the neteq_decoders_ table

webrtc/modules/audio_coding/neteq/audio_decoder_impl.h

 /*
  *  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.
  */
 
 #ifndef WEBRTC_MODULES_AUDIO_CODING_NETEQ_AUDIO_DECODER_IMPL_H_
 #define WEBRTC_MODULES_AUDIO_CODING_NETEQ_AUDIO_DECODER_IMPL_H_
 
 #include <assert.h>
 
 #include "webrtc/engine_configurations.h"
 #include "webrtc/base/constructormagic.h"
 #include "webrtc/modules/audio_coding/codecs/audio_decoder.h"
 #include "webrtc/modules/audio_coding/codecs/cng/include/webrtc_cng.h"
 #ifdef WEBRTC_CODEC_G722
 #include "webrtc/modules/audio_coding/codecs/g722/include/g722_interface.h"
 #endif
+#include "webrtc/modules/audio_coding/main/acm2/rent_a_codec.h"
 #include "webrtc/typedefs.h"
 
 namespace webrtc {
 
 // AudioDecoderCng is a special type of AudioDecoder. It inherits from
 // AudioDecoder just to fit in the DecoderDatabase. None of the class methods
 // should be used, except constructor, destructor, and accessors.
 // TODO(hlundin): Consider the possibility to create a super-class to
 // AudioDecoder that is stored in DecoderDatabase. Then AudioDecoder and a
 // specific CngDecoder class could both inherit from that class.
@@ skipping 16 matching lines @@
                      size_t encoded_len,
                      int sample_rate_hz,
                      int16_t* decoded,
                      SpeechType* speech_type) override;
 
  private:
   CNG_dec_inst* dec_state_;
   RTC_DISALLOW_COPY_AND_ASSIGN(AudioDecoderCng);
 };
 
-enum NetEqDecoder {
-  kDecoderPCMu,
-  kDecoderPCMa,
-  kDecoderPCMu_2ch,
-  kDecoderPCMa_2ch,
-  kDecoderILBC,
-  kDecoderISAC,
-  kDecoderISACswb,
-  kDecoderPCM16B,
-  kDecoderPCM16Bwb,
-  kDecoderPCM16Bswb32kHz,
-  kDecoderPCM16Bswb48kHz,
-  kDecoderPCM16B_2ch,
-  kDecoderPCM16Bwb_2ch,
-  kDecoderPCM16Bswb32kHz_2ch,
-  kDecoderPCM16Bswb48kHz_2ch,
-  kDecoderPCM16B_5ch,
-  kDecoderG722,
-  kDecoderG722_2ch,
-  kDecoderRED,
-  kDecoderAVT,
-  kDecoderCNGnb,
-  kDecoderCNGwb,
-  kDecoderCNGswb32kHz,
-  kDecoderCNGswb48kHz,
-  kDecoderArbitrary,
-  kDecoderOpus,
-  kDecoderOpus_2ch,
-};
+using NetEqDecoder = acm2::RentACodec::NetEqDecoder;
 
 // Returns true if |codec_type| is supported.
 bool CodecSupported(NetEqDecoder codec_type);
 
 // Returns the sample rate for |codec_type|.
 int CodecSampleRateHz(NetEqDecoder codec_type);
 
 // Creates an AudioDecoder object of type |codec_type|. Returns NULL for for
 // unsupported codecs, and when creating an AudioDecoder is not applicable
 // (e.g., for RED and DTMF/AVT types).
 AudioDecoder* CreateAudioDecoder(NetEqDecoder codec_type);
 
 }  // namespace webrtc
 #endif  // WEBRTC_MODULES_AUDIO_CODING_NETEQ_AUDIO_DECODER_IMPL_H_