audioproc_f with fake microphone.

webrtc/modules/audio_processing/test/audio_processing_simulator.cc

Index: webrtc/modules/audio_processing/test/audio_processing_simulator.cc
diff --git a/webrtc/modules/audio_processing/test/audio_processing_simulator.cc b/webrtc/modules/audio_processing/test/audio_processing_simulator.cc
index 2f8c75094e144f510dede9d697e095f98e1fdfcd..1f7ff47d38d50fffc76a2ed50d41255e0584e1f0 100644
--- a/webrtc/modules/audio_processing/test/audio_processing_simulator.cc
+++ b/webrtc/modules/audio_processing/test/audio_processing_simulator.cc
@@ -80,6 +80,11 @@ void CopyToAudioFrame(const ChannelBuffer<float>& src, AudioFrame* dest) {
 AudioProcessingSimulator::AudioProcessingSimulator(
     const SimulationSettings& settings)
     : settings_(settings) {
+  if (settings_.simulate_mic_gain) {
+    fake_recording_device_.emplace(
+        static_cast<FakeRecordingDevice::LevelToScalingMappingKind>(
+            *settings_.simulated_mic_kind));
+  }
   if (settings_.ed_graph_output_filename &&
       settings_.ed_graph_output_filename->size() > 0) {
     residual_echo_likelihood_graph_writer_.open(
@@ -107,15 +112,26 @@ void AudioProcessingSimulator::ProcessStream(bool fixed_interface) {
   if (fixed_interface) {
     {
       const auto st = ScopedTimer(mutable_proc_time());
-      // TODO(alessiob): Change fwd_frame_ simulating a mic with analog gain and
-      // an application gain.
+      if (fake_recording_device_) {
+        fake_recording_device_->ProcessStream(&fwd_frame_, &fwd_frame_);
+      }
       RTC_CHECK_EQ(AudioProcessing::kNoError, ap_->ProcessStream(&fwd_frame_));
     }
     CopyFromAudioFrame(fwd_frame_, out_buf_.get());
   } else {
     const auto st = ScopedTimer(mutable_proc_time());
-    // TODO(alessiob): Change in_buf_->channels() simulating a mic with analog
-    // gain and an application gain.
+    if (fake_recording_device_) {
+      const size_t channel_size = in_config_.num_frames();
+
+      std::vector<rtc::ArrayView<const float>> data_view;
+      std::vector<rtc::ArrayView<float>> after_scaling_view;
+      for (size_t i = 0; i < in_config_.num_channels(); ++i) {
+        data_view.emplace_back(in_buf_->channels()[i], channel_size);
+        after_scaling_view.emplace_back(in_buf_->channels()[i], channel_size);
+      }
+
+      fake_recording_device_->ProcessStream(data_view, after_scaling_view);
+    }
     RTC_CHECK_EQ(AudioProcessing::kNoError,
                  ap_->ProcessStream(in_buf_->channels(), in_config_,
                                     out_config_, out_buf_->channels()));