Allow an external audio processing module to be used in WebRTC

webrtc/media/engine/apm_helpers_unittest.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 15 matching lines @@
 struct TestHelper {
   TestHelper() {
     // Reply with a 10ms timer every time TimeUntilNextProcess is called to
     // avoid entering a tight loop on the process thread.
     EXPECT_CALL(mock_audio_device_, TimeUntilNextProcess())
         .WillRepeatedly(testing::Return(10));
 
     // This replicates the conditions from voe_auto_test.
     Config config;
     config.Set<ExperimentalAgc>(new ExperimentalAgc(false));
+    apm_ = rtc::scoped_refptr<AudioProcessing>(AudioProcessing::Create(config));
     EXPECT_EQ(0, voe_wrapper_.base()->Init(
-        &mock_audio_device_,
-        AudioProcessing::Create(config),
-        MockAudioDecoderFactory::CreateEmptyFactory()));
+                     &mock_audio_device_, apm_,
+                     MockAudioDecoderFactory::CreateEmptyFactory()));
   }
 
-  AudioProcessing* apm() {
-    return voe_wrapper_.base()->audio_processing();
-  }
+  AudioProcessing* apm() { return apm_.get(); }
 
-  const AudioProcessing* apm() const {
-    return voe_wrapper_.base()->audio_processing();
-  }
+  const AudioProcessing* apm() const { return apm_.get(); }
 
   test::MockAudioDeviceModule* adm() {
     return &mock_audio_device_;
   }
 
   voe::TransmitMixer* transmit_mixer() {
     return voe_wrapper_.base()->transmit_mixer();
   }
 
   bool GetEcMetricsStatus() const {
@@ skipping 11 matching lines @@
     int std = 0;
     float fraction = 0;
     int delay_metrics_result = ec->GetDelayMetrics(&median, &std, &fraction);
     return metrics_result == AudioProcessing::kNoError &&
            delay_metrics_result == AudioProcessing::kNoError;
   }
 
  private:
   testing::NiceMock<test::MockAudioDeviceModule> mock_audio_device_;
   cricket::VoEWrapper voe_wrapper_;
+  rtc::scoped_refptr<AudioProcessing> apm_;
 };
 }  // namespace
 
 TEST(ApmHelpersTest, AgcConfig_DefaultConfiguration) {
   TestHelper helper;
   AgcConfig agc_config =
       apm_helpers::GetAgcConfig(helper.apm());
 
   EXPECT_EQ(kDefaultAgcConfig.targetLeveldBOv, agc_config.targetLeveldBOv);
   EXPECT_EQ(kDefaultAgcConfig.digitalCompressionGaindB,
@@ skipping 185 matching lines @@
 // TODO(solenberg): Move this test to a better place - added here for the sake
 // of duplicating all relevant tests from audio_processing_test.cc.
 TEST(ApmHelpersTest, StereoSwapping_EnableDisable) {
   TestHelper helper;
   helper.transmit_mixer()->EnableStereoChannelSwapping(true);
   EXPECT_TRUE(helper.transmit_mixer()->IsStereoChannelSwappingEnabled());
   helper.transmit_mixer()->EnableStereoChannelSwapping(false);
   EXPECT_FALSE(helper.transmit_mixer()->IsStereoChannelSwappingEnabled());
 }
 }  // namespace webrtc