audioproc_f with simulated mic analog gain

webrtc/modules/audio_processing/test/audioproc_float.cc

Index: webrtc/modules/audio_processing/test/audioproc_float.cc
diff --git a/webrtc/modules/audio_processing/test/audioproc_float.cc b/webrtc/modules/audio_processing/test/audioproc_float.cc
index a11f41c855183c371c454ecc1b0d24d343b7e595..4e0aa718e8355a486eefb97fc8103d4a4734372a 100644
--- a/webrtc/modules/audio_processing/test/audioproc_float.cc
+++ b/webrtc/modules/audio_processing/test/audioproc_float.cc
@@ -161,6 +161,13 @@ DEFINE_int32(stream_delay,
 DEFINE_int32(stream_drift_samples,
              kParameterNotSpecifiedValue,
              "Specify the number of stream drift samples to use");
+DEFINE_int32(initial_mic_level, 100, "Initial mic level (0-255)");
+DEFINE_bool(simulate_mic_gain,
+            false,
+            "Simulate adjustable microphone analog gain");
+DEFINE_int32(simulated_mic_kind,
+             kParameterNotSpecifiedValue,
+             "Specify which microphone kind to use for microphone simulation");
 DEFINE_bool(performance_report, false, "Report the APM performance ");
 DEFINE_bool(verbose, false, "Produce verbose output");
 DEFINE_bool(bitexactness_report,
@@ -268,6 +275,9 @@ SimulationSettings CreateSettings() {
                         &settings.stream_drift_samples);
   SetSettingIfSpecified(FLAGS_custom_call_order_file,
                         &settings.custom_call_order_filename);
+  settings.initial_mic_level = FLAGS_initial_mic_level;
+  settings.simulate_mic_gain = FLAGS_simulate_mic_gain;
+  SetSettingIfSpecified(FLAGS_simulated_mic_kind, &settings.simulated_mic_kind);
   settings.report_performance = FLAGS_performance_report;
   settings.use_verbose_logging = FLAGS_verbose;
   settings.report_bitexactness = FLAGS_bitexactness_report;
@@ -384,6 +394,20 @@ void PerformBasicParameterSanityChecks(const SimulationSettings& settings) {
       "Error: --custom_call_order_file cannot be used when operating on an "
       "aecdump\n");
 
+  ReportConditionalErrorAndExit(
+      (settings.initial_mic_level < 0 || settings.initial_mic_level > 255),
+      "Error: --initial_mic_level must be specified between 0 and 255.\n");
+
+  ReportConditionalErrorAndExit(
+      settings.simulated_mic_kind && !settings.simulate_mic_gain,
+      "Error: --simulated_mic_kind cannot be specified when mic simulation is "
+      "disabled\n");
+
+  ReportConditionalErrorAndExit(
+      !settings.simulated_mic_kind && settings.simulate_mic_gain,
+      "Error: --simulated_mic_kind must be specified when mic simulation is "
+      "enabled\n");
+
   auto valid_wav_name = [](const std::string& wav_file_name) {
     if (wav_file_name.size() < 5) {
       return false;