NetEq: Use a BuiltinAudioDecoderFactory to create decoders

webrtc/modules/audio_coding/codecs/mock_audio_decoder_factory.h

+/*

[hlundin-webrtc, 2016/04/29 11:52:56]

We used to have the structure that the mock for path/to/folder/my_class.h was
located in path/to/folder/mocks/mock_my_class.h, i.e., in a subfolder named
mocks.

[kwiberg-webrtc, 2016/04/29 23:10:13]

Laudable. Will change. But we have only one mock in a "mocks" subdirectory, and
~30 in "mock" subdirectories, so I'll go with the latter.

+ *  Copyright (c) 2016 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_CODECS_MOCK_AUDIO_DECODER_FACTORY_H_
+#define WEBRTC_MODULES_AUDIO_CODING_CODECS_MOCK_AUDIO_DECODER_FACTORY_H_
+
+#include <vector>
+
+#include "testing/gmock/include/gmock/gmock.h"
+#include "webrtc/modules/audio_coding/codecs/audio_decoder_factory.h"
+
+namespace webrtc {
+
+class MockAudioDecoderFactory : public AudioDecoderFactory {
+ public:
+  MOCK_METHOD0(GetSupportedFormats, std::vector<SdpAudioFormat>());
+  std::unique_ptr<AudioDecoder> MakeAudioDecoder(

[ossu, 2016/04/29 12:21:33]

Why is this? Just to remove the std::unique_ptr<> stuff from any mocks?

[kwiberg-webrtc, 2016/04/29 23:10:13]

Yes. gmock is pre-C++11 and doesn't properly forward the return values,
resulting in them being copied, not moved. I work around it by having the mock
return void and passing the return value in an argument.

[ossu, 2016/05/02 10:59:40]

Ah, I see.

+      const SdpAudioFormat& format) override {
+    std::unique_ptr<AudioDecoder> return_value;
+    MakeAudioDecoderMock(format, &return_value);
+    return return_value;
+  }
+  MOCK_METHOD2(MakeAudioDecoderMock,
+               void(const SdpAudioFormat& format,
+                    std::unique_ptr<AudioDecoder>* return_value));
+};
+
+}  // namespace webrtc
+
+#endif  // WEBRTC_MODULES_AUDIO_CODING_CODECS_MOCK_AUDIO_DECODER_FACTORY_H_