Extension and refactoring of the audioproc_f tool to be a fully fledged tool for audio processing m…

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 41e45bfdc69c5c20525d89a0df3dc771fb70004d..5fa2639491876bcc770baf2f3b9edbc3ee3ca990 100644
--- a/webrtc/modules/audio_processing/test/audioproc_float.cc
+++ b/webrtc/modules/audio_processing/test/audioproc_float.cc
@@ -1,5 +1,5 @@
 /*
- *  Copyright (c) 2014 The WebRTC project authors. All Rights Reserved.
+ *  Copyright (c) 2015 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
@@ -8,179 +8,429 @@
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
-#include <stdio.h>
-
-#include <iostream>
 #include <memory>
-#include <sstream>
-#include <string>
-#include <utility>
 
 #include "gflags/gflags.h"
-#include "webrtc/base/checks.h"
-#include "webrtc/base/format_macros.h"
-#include "webrtc/common_audio/channel_buffer.h"
-#include "webrtc/common_audio/wav_file.h"
 #include "webrtc/modules/audio_processing/include/audio_processing.h"
-#include "webrtc/modules/audio_processing/test/audio_file_processor.h"
-#include "webrtc/modules/audio_processing/test/protobuf_utils.h"
-#include "webrtc/modules/audio_processing/test/test_utils.h"
-#include "webrtc/system_wrappers/include/tick_util.h"
-#include "webrtc/test/testsupport/trace_to_stderr.h"
+#include "webrtc/modules/audio_processing/test/aec_dump_based_simulator.h"
+#include "webrtc/modules/audio_processing/test/audio_processing_simulator.h"
+#include "webrtc/modules/audio_processing/test/wav_based_simulator.h"
 
+namespace webrtc {
+namespace test {
 namespace {
 
-bool ValidateOutChannels(const char* flagname, int32_t value) {
-  return value >= 0;
+const int kParameterNotSpecifiedValue = -10000;
+
+const char kUsageDescription[] =
+    "Usage: audioproc_f [options] -i <input.wav>\n"
+    "                   or\n"
+    "                    audioproc_f [options] -dump <aec_dump>\n"
+    "\n\n"
+    "Command-line tool to simulate a call using the audio "
+    "processing module, either based on wav files or "
+    "protobuf debug dump recordings and writes to an output";
+
+DEFINE_string(dump_input, "", "Aec dump input filename");
+DEFINE_string(dump_output, "", "Aec dump output filename");
+DEFINE_string(i, "", "Forward stream input wav filename");
+DEFINE_string(o, "", "Forward stream output wav filename");
+DEFINE_string(ri, "", "Reverse stream input wav filename");
+DEFINE_string(ro, "", "Reverse stream output wav filename");
+DEFINE_int32(output_num_channels,
+             kParameterNotSpecifiedValue,
+             "Number of forward stream output channels");
+DEFINE_int32(reverse_output_num_channels,
+             kParameterNotSpecifiedValue,
+             "Number of Reverse stream output channels");
+DEFINE_int32(output_sample_rate_hz,
+             kParameterNotSpecifiedValue,
+             "Forward stream output sample rate in Hz");
+DEFINE_int32(reverse_output_sample_rate_hz,
+             kParameterNotSpecifiedValue,
+             "Reverse stream output sample rate in Hz");
+DEFINE_string(mic_positions,
+              "",
+              "Space delimited cartesian coordinates of microphones in "
+              "meters. The coordinates of each point are contiguous. For a "
+              "two element array: \"x1 y1 z1 x2 y2 z2\"");
+DEFINE_int32(target_angle_degrees,
+             90,
+             "The azimuth of the target in degrees (0-359). Only applies to "
+             "beamforming.");
+DEFINE_bool(fixed_interface,
+            false,
+            "Use the fixed interface when operating on wav files");
+DEFINE_bool(aec, false, "Activate the echo canceller");
+DEFINE_bool(no_aec, false, "Dectivate the echo canceller");
+DEFINE_bool(aecm, false, "Activate the mobile echo controller");
+DEFINE_bool(no_aecm, false, "Dectivate the mobile echo controller");
+DEFINE_bool(agc, false, "Activate the AGC");
+DEFINE_bool(no_agc, false, "Dectivate the AGC");
+DEFINE_bool(hpf, false, "Activate the high-pass filter");
+DEFINE_bool(no_hpf, false, "Dectivate the high-pass filter");
+DEFINE_bool(ns, false, "Activate the noise suppressor");
+DEFINE_bool(no_ns, false, "Dectivate the noise suppressor");
+DEFINE_bool(ts, false, "Activate the transient suppressor");
+DEFINE_bool(no_ts, false, "Dectivate the transient suppressor");
+DEFINE_bool(bf, false, "Activate the beamformer");
+DEFINE_bool(no_bf, false, "Dectivate the beamformer");
+DEFINE_bool(ie, false, "Activate the intelligibility enhancer");
+DEFINE_bool(no_ie, false, "Dectivate the intelligibility enhancer");
+DEFINE_bool(vad, false, "Activate the voice activity detector");
+DEFINE_bool(no_vad, false, "Dectivate the voice activity detector");
+DEFINE_bool(le, false, "Activate the level estimator");
+DEFINE_bool(no_le, false, "Dectivate the level estimator");
+DEFINE_bool(all_default,
+            false,
+            "Activate all of the default components (will be overridden by any "
+            "other settings)");
+DEFINE_int32(aec_suppression_level,
+             kParameterNotSpecifiedValue,
+             "Set the aec suppression level (0-2)");
+DEFINE_bool(delay_agnostic, false, "Activate the level estimator");
+DEFINE_bool(no_delay_agnostic, false, "Dectivate the level estimator");
+DEFINE_bool(extended_filter, false, "Activate the level estimator");
+DEFINE_bool(no_extended_filter, false, "Dectivate the level estimator");
+DEFINE_bool(drift_compensation, false, "Activate the level estimator");
+DEFINE_bool(no_drift_compensation, false, "Dectivate the level estimator");
+DEFINE_bool(aec3, false, "Activate the level estimator");
+DEFINE_bool(no_aec3, false, "Dectivate the level estimator");
+DEFINE_bool(refined_adaptive_filter,
+            false,
+            "Activate the refined adaptive filter functionality");
+DEFINE_bool(no_refined_adaptive_filter,
+            false,
+            "Deactivate the refined adaptive filter functionality");
+DEFINE_int32(aecm_routing_mode,
+             kParameterNotSpecifiedValue,
+             "Specify the AECM routing mode (0-4)");
+DEFINE_bool(aecm_comfort_noise, false, "Activate the AECM comfort noise");
+DEFINE_bool(no_aecm_comfort_noise, false, "Dectivate the AECM comfort noise");
+DEFINE_int32(agc_mode,
+             kParameterNotSpecifiedValue,
+             "Specify the AGC mode (0-2)");
+DEFINE_int32(agc_target_level,
+             kParameterNotSpecifiedValue,
+             "Specify the AGC target level (0-31)");
+DEFINE_bool(agc_limiter, false, "Activate the level estimator");
+DEFINE_bool(no_agc_limiter, false, "Dectivate the level estimator");
+DEFINE_int32(agc_compression_gain,
+             kParameterNotSpecifiedValue,
+             "Specify the AGC compression gain (0-90)");
+DEFINE_int32(vad_likelihood,
+             kParameterNotSpecifiedValue,
+             "Specify the VAD likelihood (0-3)");
+DEFINE_int32(ns_level,
+             kParameterNotSpecifiedValue,
+             "Specify the NS level (0-3)");
+DEFINE_int32(stream_delay,
+             kParameterNotSpecifiedValue,
+             "Specify the stream delay in ms to use");
+DEFINE_int32(stream_drift_samples,
+             kParameterNotSpecifiedValue,
+             "Specify the number of stream drift samples to use");
+DEFINE_bool(performance_report, false, "Report the APM performance ");
+DEFINE_bool(verbose, false, "Produce verbose output");
+DEFINE_bool(bitexactness_report,
+            false,
+            "Report bitexactness for aec dump result reproduction");
+DEFINE_bool(discard_settings_in_aecdump,
+            false,
+            "Discard any config settings specified in the aec dump");
+DEFINE_bool(store_intermediate_output,
+            false,
+            "Creates new output files after each init");
+
+void SetSettingIfSpecified(const std::string value,
+                           rtc::Optional<std::string>* parameter) {
+  if (value.compare("") != 0) {
+    *parameter = rtc::Optional<std::string>(value);
+  }
 }
 
-}  // namespace
+void SetSettingIfSpecified(int value, rtc::Optional<int>* parameter) {
+  if (value != kParameterNotSpecifiedValue) {
+    *parameter = rtc::Optional<int>(value);
+  }
+}
 
-DEFINE_string(dump, "", "Name of the aecdump debug file to read from.");
-DEFINE_string(i, "", "Name of the capture input stream file to read from.");
-DEFINE_string(
-    o,
-    "out.wav",
-    "Name of the output file to write the processed capture stream to.");
-DEFINE_string(ri, "", "Name of the render input stream file to read from.");
-DEFINE_string(
-    ro,
-    "out_reverse.wav",
-    "Name of the output file to write the processed render stream to.");
-DEFINE_int32(out_channels, 1, "Number of output channels.");
-const bool out_channels_dummy =
-    google::RegisterFlagValidator(&FLAGS_out_channels, &ValidateOutChannels);
-DEFINE_int32(rev_out_channels, 1, "Number of reverse output channels.");
-const bool rev_out_channels_dummy =
-    google::RegisterFlagValidator(&FLAGS_rev_out_channels,
-                                  &ValidateOutChannels);
-DEFINE_int32(out_sample_rate, 48000, "Output sample rate in Hz.");
-DEFINE_int32(rev_out_sample_rate, 48000, "Reverse output sample rate in Hz.");
-DEFINE_string(mic_positions, "",
-    "Space delimited cartesian coordinates of microphones in meters. "
-    "The coordinates of each point are contiguous. "
-    "For a two element array: \"x1 y1 z1 x2 y2 z2\"");
-DEFINE_double(
-    target_angle_degrees,
-    90,
-    "The azimuth of the target in degrees. Only applies to beamforming.");
-
-DEFINE_bool(aec, false, "Enable echo cancellation.");
-DEFINE_bool(agc, false, "Enable automatic gain control.");
-DEFINE_bool(hpf, false, "Enable high-pass filtering.");
-DEFINE_bool(ns, false, "Enable noise suppression.");
-DEFINE_bool(ts, false, "Enable transient suppression.");
-DEFINE_bool(bf, false, "Enable beamforming.");
-DEFINE_bool(ie, false, "Enable intelligibility enhancer.");
-DEFINE_bool(all, false, "Enable all components.");
-
-DEFINE_int32(ns_level, -1, "Noise suppression level [0 - 3].");
-
-DEFINE_bool(perf, false, "Enable performance tests.");
+void SetSettingIfFlagSet(bool condition,
+                         rtc::Optional<bool>* parameter,
+                         bool value_to_set) {
+  if (condition) {
+    *parameter = rtc::Optional<bool>(value_to_set);
+  }
+}
 
-namespace webrtc {
-namespace {
+SimulationSettings CreateSettings() {
+  SimulationSettings settings;
+  if (FLAGS_all_default) {
+    settings.use_le = rtc::Optional<bool>(true);
+    settings.use_vad = rtc::Optional<bool>(true);
+    settings.use_ie = rtc::Optional<bool>(false);
+    settings.use_bf = rtc::Optional<bool>(false);
+    settings.use_ts = rtc::Optional<bool>(true);
+    settings.use_ns = rtc::Optional<bool>(true);
+    settings.use_hpf = rtc::Optional<bool>(true);
+    settings.use_agc = rtc::Optional<bool>(true);
+    settings.use_aec = rtc::Optional<bool>(true);
+    settings.use_aecm = rtc::Optional<bool>(false);
+  }
+  SetSettingIfSpecified(FLAGS_dump_input, &settings.aec_dump_input_filename);
+  SetSettingIfSpecified(FLAGS_dump_output, &settings.aec_dump_output_filename);
+  SetSettingIfSpecified(FLAGS_i, &settings.input_filename);
+  SetSettingIfSpecified(FLAGS_o, &settings.output_filename);
+  SetSettingIfSpecified(FLAGS_ri, &settings.reverse_input_filename);
+  SetSettingIfSpecified(FLAGS_ro, &settings.reverse_output_filename);
+  SetSettingIfSpecified(FLAGS_output_num_channels,
+                        &settings.output_num_channels);
+  SetSettingIfSpecified(FLAGS_reverse_output_num_channels,
+                        &settings.reverse_output_num_channels);
+  SetSettingIfSpecified(FLAGS_output_sample_rate_hz,
+                        &settings.output_sample_rate_hz);
+  SetSettingIfSpecified(FLAGS_reverse_output_sample_rate_hz,
+                        &settings.reverse_output_sample_rate_hz);
+  SetSettingIfSpecified(FLAGS_mic_positions, &settings.microphone_positions);
+  settings.target_angle_degrees = FLAGS_target_angle_degrees;
+  SetSettingIfFlagSet(FLAGS_aec, &settings.use_aec, true);
+  SetSettingIfFlagSet(FLAGS_no_aec, &settings.use_aec, false);
+  SetSettingIfFlagSet(FLAGS_aecm, &settings.use_aecm, true);
+  SetSettingIfFlagSet(FLAGS_no_aecm, &settings.use_aecm, false);
+  SetSettingIfFlagSet(FLAGS_agc, &settings.use_agc, true);
+  SetSettingIfFlagSet(FLAGS_no_agc, &settings.use_agc, false);
+  SetSettingIfFlagSet(FLAGS_hpf, &settings.use_hpf, true);
+  SetSettingIfFlagSet(FLAGS_no_hpf, &settings.use_hpf, false);
+  SetSettingIfFlagSet(FLAGS_ns, &settings.use_ns, true);
+  SetSettingIfFlagSet(FLAGS_no_ns, &settings.use_ns, false);
+  SetSettingIfFlagSet(FLAGS_ts, &settings.use_ts, true);
+  SetSettingIfFlagSet(FLAGS_no_ts, &settings.use_ts, false);
+  SetSettingIfFlagSet(FLAGS_bf, &settings.use_bf, true);
+  SetSettingIfFlagSet(FLAGS_no_bf, &settings.use_bf, false);
+  SetSettingIfFlagSet(FLAGS_ie, &settings.use_ie, true);
+  SetSettingIfFlagSet(FLAGS_no_ie, &settings.use_ie, false);
+  SetSettingIfFlagSet(FLAGS_vad, &settings.use_vad, true);
+  SetSettingIfFlagSet(FLAGS_no_vad, &settings.use_vad, false);
+  SetSettingIfFlagSet(FLAGS_le, &settings.use_le, true);
+  SetSettingIfFlagSet(FLAGS_no_le, &settings.use_le, false);
+  SetSettingIfSpecified(FLAGS_aec_suppression_level,
+                        &settings.aec_suppression_level);
+  SetSettingIfFlagSet(FLAGS_delay_agnostic, &settings.use_delay_agnostic, true);
+  SetSettingIfFlagSet(FLAGS_no_delay_agnostic, &settings.use_delay_agnostic,
+                      false);
+  SetSettingIfFlagSet(FLAGS_extended_filter, &settings.use_extended_filter,
+                      true);
+  SetSettingIfFlagSet(FLAGS_no_extended_filter, &settings.use_extended_filter,
+                      false);
+  SetSettingIfFlagSet(FLAGS_drift_compensation,
+                      &settings.use_drift_compensation, true);
+  SetSettingIfFlagSet(FLAGS_no_drift_compensation,
+                      &settings.use_drift_compensation, false);
+  SetSettingIfFlagSet(FLAGS_refined_adaptive_filter,
+                      &settings.use_refined_adaptive_filter, true);
+  SetSettingIfFlagSet(FLAGS_no_refined_adaptive_filter,
+                      &settings.use_refined_adaptive_filter, false);
 
-const int kChunksPerSecond = 100;
-const char kUsage[] =
-    "Command-line tool to run audio processing on WAV files. Accepts either\n"
-    "an input capture WAV file or protobuf debug dump and writes to an output\n"
-    "WAV file.\n"
-    "\n"
-    "All components are disabled by default.";
+  SetSettingIfFlagSet(FLAGS_aec3, &settings.use_aec3, true);
+  SetSettingIfFlagSet(FLAGS_no_aec3, &settings.use_aec3, false);
+  SetSettingIfSpecified(FLAGS_aecm_routing_mode, &settings.aecm_routing_mode);
+  SetSettingIfFlagSet(FLAGS_aecm_comfort_noise,
+                      &settings.use_aecm_comfort_noise, true);
+  SetSettingIfFlagSet(FLAGS_no_aecm_comfort_noise,
+                      &settings.use_aecm_comfort_noise, false);
+  SetSettingIfSpecified(FLAGS_agc_mode, &settings.agc_mode);
+  SetSettingIfSpecified(FLAGS_agc_target_level, &settings.agc_target_level);
+  SetSettingIfFlagSet(FLAGS_agc_limiter, &settings.use_agc_limiter, true);
+  SetSettingIfFlagSet(FLAGS_no_agc_limiter, &settings.use_agc_limiter, false);
+  SetSettingIfSpecified(FLAGS_agc_compression_gain,
+                        &settings.agc_compression_gain);
+  SetSettingIfSpecified(FLAGS_vad_likelihood, &settings.vad_likelihood);
+  SetSettingIfSpecified(FLAGS_ns_level, &settings.ns_level);
+  SetSettingIfSpecified(FLAGS_stream_delay, &settings.stream_delay);
+  SetSettingIfSpecified(FLAGS_stream_drift_samples,
+                        &settings.stream_drift_samples);
+  settings.report_performance = FLAGS_performance_report;
+  settings.use_verbose_logging = FLAGS_verbose;
+  settings.report_bitexactness = FLAGS_bitexactness_report;
+  settings.discard_all_settings_in_aecdump = FLAGS_discard_settings_in_aecdump;
+  settings.fixed_interface = FLAGS_fixed_interface;
+  settings.store_intermediate_output = FLAGS_store_intermediate_output;
 
-}  // namespace
+  return settings;
+}
 
-int main(int argc, char* argv[]) {
-  google::SetUsageMessage(kUsage);
-  google::ParseCommandLineFlags(&argc, &argv, true);
+void ReportConditionalErrorAndExit(bool condition, std::string message) {
+  if (condition) {
+    fprintf(stderr, "%s", message.c_str());
+    exit(1);
+  }
+}
+
+void PerformBasicParameterSanityChecks(const SimulationSettings& settings) {
+  if (settings.input_filename || settings.reverse_input_filename) {
+    ReportConditionalErrorAndExit(!!settings.aec_dump_input_filename,
+                                  "Error: The aec dump cannot be specified "
+                                  "together with input wav files!\n");
 
-  if (!((FLAGS_i.empty()) ^ (FLAGS_dump.empty()))) {
-    fprintf(stderr,
-            "An input file must be specified with either -i or -dump.\n");
-    return 1;
+    ReportConditionalErrorAndExit(!settings.input_filename,
+                                  "Error: When operating at wav files, the "
+                                  "input wav filename must be "
+                                  "specified!\n");
+
+    ReportConditionalErrorAndExit(
+        settings.reverse_output_filename && !settings.reverse_input_filename,
+        "Error: When operating at wav files, the reverse input wav filename "
+        "must be specified if the reverse output wav filename is specified!\n");
+  } else {
+    ReportConditionalErrorAndExit(!settings.aec_dump_input_filename,
+                                  "Error: Either the aec dump or the wav "
+                                  "input files must be specified!\n");
   }
 
-  test::TraceToStderr trace_to_stderr(true);
-  Config config;
-  if (FLAGS_bf || FLAGS_all) {
-    if (FLAGS_mic_positions.empty()) {
-      fprintf(stderr, "-mic_positions must be specified when -bf is used.\n");
-      return 1;
+  ReportConditionalErrorAndExit(
+      settings.use_aec && *settings.use_aec && settings.use_aecm &&
+          *settings.use_aecm,
+      "Error: The AEC and the AECM cannot be activated at the same time!\n");
+
+  ReportConditionalErrorAndExit(
+      settings.output_sample_rate_hz && *settings.output_sample_rate_hz <= 0,
+      "Error: --output_sample_rate_hz must be positive!\n");
+
+  ReportConditionalErrorAndExit(
+      settings.reverse_output_sample_rate_hz &&
+          settings.output_sample_rate_hz &&
+          *settings.output_sample_rate_hz <= 0,
+      "Error: --reverse_output_sample_rate_hz must be positive!\n");
+
+  ReportConditionalErrorAndExit(
+      settings.output_num_channels && *settings.output_num_channels <= 0,
+      "Error: --output_num_channels must be positive!\n");
+
+  ReportConditionalErrorAndExit(
+      settings.reverse_output_num_channels &&
+          *settings.reverse_output_num_channels <= 0,
+      "Error: --reverse_output_num_channels must be positive!\n");
+
+  ReportConditionalErrorAndExit(
+      settings.use_bf && *settings.use_bf && !settings.microphone_positions,
+      "Error: --mic_positions must be specified when the beamformer is "
+      "activated.\n");
+
+  ReportConditionalErrorAndExit(
+      settings.target_angle_degrees < 0 || settings.target_angle_degrees > 359,
+      "Error: -target_angle_degrees must be specified between 0 and 359.\n");
+
+  ReportConditionalErrorAndExit(
+      settings.aec_suppression_level &&
+          ((*settings.aec_suppression_level) < 0 ||
+           (*settings.aec_suppression_level) > 2),
+      "Error: --aec_suppression_level must be specified between 0 and 2.\n");
+
+  ReportConditionalErrorAndExit(
+      settings.aecm_routing_mode && ((*settings.aecm_routing_mode) < 0 ||
+                                     (*settings.aecm_routing_mode) > 4),
+      "Error: --aecm_routing_mode must be specified between 0 and 4.\n");
+
+  ReportConditionalErrorAndExit(
+      settings.agc_target_level && ((*settings.agc_target_level) < 0 ||
+                                    (*settings.agc_target_level) > 31),
+      "Error: --agc_target_level must be specified between 0 and 31.\n");
+
+  ReportConditionalErrorAndExit(
+      settings.agc_compression_gain && ((*settings.agc_compression_gain) < 0 ||
+                                        (*settings.agc_compression_gain) > 90),
+      "Error: --agc_compression_gain must be specified between 0 and 90.\n");
+
+  ReportConditionalErrorAndExit(
+      settings.vad_likelihood &&
+          ((*settings.vad_likelihood) < 0 || (*settings.vad_likelihood) > 3),
+      "Error: --vad_likelihood must be specified between 0 and 3.\n");
+
+  ReportConditionalErrorAndExit(
+      settings.ns_level &&
+          ((*settings.ns_level) < 0 || (*settings.ns_level) > 3),
+      "Error: --ns_level must be specified between 0 and 3.\n");
+
+  ReportConditionalErrorAndExit(
+      settings.report_bitexactness && !settings.aec_dump_input_filename,
+      "Error: --bitexactness_report can only be used when operating on an "
+      "aecdump\n");
+
+  auto valid_wav_name = [](const std::string& wav_file_name) {
+    if (wav_file_name.size() < 5) {
+      return false;
     }
-    config.Set<Beamforming>(new Beamforming(
-        true, ParseArrayGeometry(FLAGS_mic_positions),
-        SphericalPointf(DegreesToRadians(FLAGS_target_angle_degrees), 0.f,
-                        1.f)));
-  }
-  config.Set<ExperimentalNs>(new ExperimentalNs(FLAGS_ts || FLAGS_all));
-  config.Set<Intelligibility>(new Intelligibility(FLAGS_ie || FLAGS_all));
-
-  std::unique_ptr<AudioProcessing> ap(AudioProcessing::Create(config));
-  RTC_CHECK_EQ(kNoErr, ap->echo_cancellation()->Enable(FLAGS_aec || FLAGS_all));
-  RTC_CHECK_EQ(kNoErr, ap->gain_control()->Enable(FLAGS_agc || FLAGS_all));
-  RTC_CHECK_EQ(kNoErr, ap->high_pass_filter()->Enable(FLAGS_hpf || FLAGS_all));
-  RTC_CHECK_EQ(kNoErr, ap->noise_suppression()->Enable(FLAGS_ns || FLAGS_all));
-  if (FLAGS_ns_level != -1) {
-    RTC_CHECK_EQ(kNoErr,
-                 ap->noise_suppression()->set_level(
-                     static_cast<NoiseSuppression::Level>(FLAGS_ns_level)));
-  }
-  ap->set_stream_key_pressed(FLAGS_ts);
-
-  std::unique_ptr<AudioFileProcessor> processor;
-  auto out_file = std::unique_ptr<WavWriter>(new WavWriter(
-      FLAGS_o, FLAGS_out_sample_rate, static_cast<size_t>(FLAGS_out_channels)));
-  std::cout << FLAGS_o << ": " << out_file->FormatAsString() << std::endl;
-  if (FLAGS_dump.empty()) {
-    auto in_file = std::unique_ptr<WavReader>(new WavReader(FLAGS_i));
-    std::cout << FLAGS_i << ": " << in_file->FormatAsString() << std::endl;
-    std::unique_ptr<WavReader> reverse_in_file;
-    std::unique_ptr<WavWriter> reverse_out_file;
-    if (!FLAGS_ri.empty()) {
-      reverse_in_file.reset(new WavReader(FLAGS_ri));
-      reverse_out_file.reset(new WavWriter(
-          FLAGS_ro,
-          FLAGS_rev_out_sample_rate,
-          static_cast<size_t>(FLAGS_rev_out_channels)));
-      std::cout << FLAGS_ri << ": "
-                << reverse_in_file->FormatAsString() << std::endl;
-      std::cout << FLAGS_ro << ": "
-                << reverse_out_file->FormatAsString() << std::endl;
+    if ((wav_file_name.compare(wav_file_name.size() - 4, 4, ".wav") == 0) ||
+        (wav_file_name.compare(wav_file_name.size() - 4, 4, ".WAV") == 0)) {
+      return true;
     }
-    processor.reset(new WavFileProcessor(std::move(ap),
-                                         std::move(in_file),
-                                         std::move(out_file),
-                                         std::move(reverse_in_file),
-                                         std::move(reverse_out_file)));
+    return false;
+  };
+
+  ReportConditionalErrorAndExit(
+      settings.input_filename && (!valid_wav_name(*settings.input_filename)),
+      "Error: --i must be a valid .wav file name.\n");
+
+  ReportConditionalErrorAndExit(
+      settings.output_filename && (!valid_wav_name(*settings.output_filename)),
+      "Error: --o must be a valid .wav file name.\n");
 
+  ReportConditionalErrorAndExit(
+      settings.reverse_input_filename &&
+          (!valid_wav_name(*settings.reverse_input_filename)),
+      "Error: --ri must be a valid .wav file name.\n");
+
+  ReportConditionalErrorAndExit(
+      settings.reverse_output_filename &&
+          (!valid_wav_name(*settings.reverse_output_filename)),
+      "Error: --ro must be a valid .wav file name.\n");
+}
+
+}  // namespace
+
+int main(int argc, char* argv[]) {
+  google::SetUsageMessage(kUsageDescription);
+  google::ParseCommandLineFlags(&argc, &argv, true);
+
+  SimulationSettings settings = CreateSettings();
+  PerformBasicParameterSanityChecks(settings);
+  std::unique_ptr<AudioProcessingSimulator> processor;
+
+  if (settings.aec_dump_input_filename) {
+    processor.reset(new AecDumpBasedSimulator(settings));
   } else {
-    processor.reset(new AecDumpFileProcessor(
-        std::move(ap), fopen(FLAGS_dump.c_str(), "rb"), std::move(out_file)));
+    processor.reset(new WavBasedSimulator(settings));
   }
 
-  int num_chunks = 0;
-  while (processor->ProcessChunk()) {
-    trace_to_stderr.SetTimeSeconds(num_chunks * 1.f / kChunksPerSecond);
-    ++num_chunks;
-  }
+  processor->Process();
 
-  if (FLAGS_perf) {
+  if (settings.report_performance) {
     const auto& proc_time = processor->proc_time();
     int64_t exec_time_us = proc_time.sum.Microseconds();
     printf(
         "\nExecution time: %.3f s, File time: %.2f s\n"
-        "Time per chunk (mean, max, min):\n%.0f us, %.0f us, %.0f us\n",
-        exec_time_us * 1e-6, num_chunks * 1.f / kChunksPerSecond,
-        exec_time_us * 1.f / num_chunks, 1.f * proc_time.max.Microseconds(),
-        1.f * proc_time.min.Microseconds());
+        "Time per fwd stream chunk (mean, max, min):\n%.0f us, %.0f us, %.0f "
+        "us\n",
+        exec_time_us * 1e-6, processor->get_num_process_stream_calls() * 1.f /
+                                 AudioProcessingSimulator::kChunksPerSecond,
+        exec_time_us * 1.f / processor->get_num_process_stream_calls(),
+        1.f * proc_time.max.Microseconds(), 1.f * proc_time.min.Microseconds());
+  }
+
+  if (settings.report_bitexactness && settings.aec_dump_input_filename) {
+    if (processor->OutputWasBitexact()) {
+      printf("The processing was bitexact.\n");
+    } else {
+      printf("The processing was not bitexact.\n");
+    }
   }
 
   return 0;
 }
 
+}  // namespace test
 }  // namespace webrtc
 
 int main(int argc, char* argv[]) {
-  return webrtc::main(argc, argv);
+  return webrtc::test::main(argc, argv);
 }