audioproc_f with simulated mic analog gain

webrtc/modules/audio_processing/test/wav_based_simulator.cc

Index: webrtc/modules/audio_processing/test/wav_based_simulator.cc
diff --git a/webrtc/modules/audio_processing/test/wav_based_simulator.cc b/webrtc/modules/audio_processing/test/wav_based_simulator.cc
index 6cf0b744e6f5c040c81f7b8798e0992008c96b63..c7baeb53868034fda42c5a4d2c4e66d92a6b9dde 100644
--- a/webrtc/modules/audio_processing/test/wav_based_simulator.cc
+++ b/webrtc/modules/audio_processing/test/wav_based_simulator.cc
@@ -12,8 +12,11 @@
 
 #include <stdio.h>
 #include <iostream>
+#include <memory>
+#include <utility>
 
 #include "webrtc/base/checks.h"
+#include "webrtc/modules/audio_processing/test/fake_recording_device.h"
 #include "webrtc/modules/audio_processing/test/test_utils.h"
 #include "webrtc/test/testsupport/trace_to_stderr.h"
 
@@ -55,7 +58,11 @@ WavBasedSimulator::GetCustomEventChain(const std::string& filename) {
 }
 
 WavBasedSimulator::WavBasedSimulator(const SimulationSettings& settings)
-      : AudioProcessingSimulator(settings) {}
+    : AudioProcessingSimulator(settings) {
+  // When a wav file is used, there is no information available about the mic
+  // gain level.
+  real_recording_device_level_ = FakeRecordingDevice::kRealDeviceLevelUnknown;

[peah-webrtc, 2017/05/05 20:25:21]

This seems like exactly what to use Optional for. I'd rather prefer
real_recording_device_level_ to be an rtc::Optional<int> than having to rely on
magic values for that. With that, these lines can be removed.

[AleBzk, 2017/05/16 08:53:04]

Done.

+}
 
 WavBasedSimulator::~WavBasedSimulator() = default;
 
@@ -79,10 +86,6 @@ void WavBasedSimulator::PrepareProcessStreamCall() {
 
   ap_->echo_cancellation()->set_stream_drift_samples(
       settings_.stream_drift_samples ? *settings_.stream_drift_samples : 0);
-
-  RTC_CHECK_EQ(AudioProcessing::kNoError,
-               ap_->gain_control()->set_stream_analog_level(
-                   last_specified_microphone_level_));
 }
 
 void WavBasedSimulator::PrepareReverseProcessStreamCall() {
@@ -143,10 +146,6 @@ bool WavBasedSimulator::HandleProcessStreamCall() {
   if (samples_left_to_process) {
     PrepareProcessStreamCall();
     ProcessStream(settings_.fixed_interface);
-    // Call stream analog level to ensure that any side-effects are triggered.
-    (void)ap_->gain_control()->stream_analog_level();
-    last_specified_microphone_level_ =
-        ap_->gain_control()->stream_analog_level();
   }
   return samples_left_to_process;
 }