Normalize codec names to those used by AcmCodecDatabase.

webrtc/modules/audio_coding/codecs/builtin_audio_encoder_factory.cc

 /*
  *  Copyright (c) 2017 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 69 matching lines @@
     NamedEncoderFactory::ForEncoder<AudioEncoderPcmA>(),
     NamedEncoderFactory::ForEncoder<AudioEncoderPcmU>(),
 };
 }  // namespace
 
 class BuiltinAudioEncoderFactory : public AudioEncoderFactory {
  public:
   std::vector<AudioCodecSpec> GetSupportedEncoders() override {
     static const SdpAudioFormat desired_encoders[] = {
         {"opus", 48000, 2, {{"minptime", "10"}, {"useinbandfec", "1"}}},
-        {"isac", 16000, 1},
-        {"isac", 32000, 1},
+        {"ISAC", 16000, 1},
+        {"ISAC", 32000, 1},
         {"G722", 8000, 1},
-        {"iLBC", 8000, 1},
+        {"ILBC", 8000, 1},
         {"PCMU", 8000, 1},
         {"PCMA", 8000, 1},
     };
 
     // Initialize thread-safely, once, on first use.
     static const std::vector<AudioCodecSpec> specs = [] {
       std::vector<AudioCodecSpec> specs;
       for (const auto& format : desired_encoders) {
         for (const auto& ef : encoder_factories) {
           if (STR_CASE_CMP(format.name.c_str(), ef.name) == 0) {
@@ skipping 30 matching lines @@
     return nullptr;
   }
 };
 
 rtc::scoped_refptr<AudioEncoderFactory> CreateBuiltinAudioEncoderFactory() {
   return rtc::scoped_refptr<AudioEncoderFactory>(
       new rtc::RefCountedObject<BuiltinAudioEncoderFactory>());
 }
 
 }  // namespace webrtc