Replace remaining gflags usages with rtc_base/flags

webrtc/modules/audio_processing/transient/transient_suppression_test.cc

 /*
  *  Copyright (c) 2013 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.
  */
 
 #include "webrtc/modules/audio_processing/transient/transient_suppressor.h"
 
 #include <stdlib.h>
 #include <stdio.h>
+#include <string.h>
 
 #include <memory>
 #include <string>
 
-#include "gflags/gflags.h"
 #include "webrtc/common_audio/include/audio_util.h"
 #include "webrtc/modules/audio_processing/agc/agc.h"
 #include "webrtc/modules/include/module_common_types.h"
+#include "webrtc/rtc_base/flags.h"
 #include "webrtc/test/gtest.h"
 #include "webrtc/test/testsupport/fileutils.h"
 #include "webrtc/typedefs.h"
 
 DEFINE_string(in_file_name, "", "PCM file that contains the signal.");
 DEFINE_string(detection_file_name,
               "",
               "PCM file that contains the detection signal.");
 DEFINE_string(reference_file_name,
               "",
               "PCM file that contains the reference signal.");
 
-static bool ValidatePositiveInt(const char* flagname, int32_t value) {
-  if (value <= 0) {
-    printf("%s must be a positive integer.\n", flagname);
-    return false;
-  }
-  return true;
-}
-DEFINE_int32(chunk_size_ms,
-             10,
-             "Time between each chunk of samples in milliseconds.");
-static const bool chunk_size_ms_dummy =
-    google::RegisterFlagValidator(&FLAGS_chunk_size_ms, &ValidatePositiveInt);
+DEFINE_int(chunk_size_ms,
+           10,
+           "Time between each chunk of samples in milliseconds.");
 
-DEFINE_int32(sample_rate_hz,
-             16000,
-             "Sampling frequency of the signal in Hertz.");
-static const bool sample_rate_hz_dummy =
-    google::RegisterFlagValidator(&FLAGS_sample_rate_hz, &ValidatePositiveInt);
-DEFINE_int32(detection_rate_hz,
-             0,
-             "Sampling frequency of the detection signal in Hertz.");
+DEFINE_int(sample_rate_hz,
+           16000,
+           "Sampling frequency of the signal in Hertz.");
+DEFINE_int(detection_rate_hz,
+           0,
+           "Sampling frequency of the detection signal in Hertz.");
 
-DEFINE_int32(num_channels, 1, "Number of channels.");
-static const bool num_channels_dummy =
-    google::RegisterFlagValidator(&FLAGS_num_channels, &ValidatePositiveInt);
+DEFINE_int(num_channels, 1, "Number of channels.");
+
+DEFINE_bool(help, false, "Print this message.");
 
 namespace webrtc {
 
 const char kUsage[] =
     "\nDetects and suppresses transients from file.\n\n"
     "This application loads the signal from the in_file_name with a specific\n"
     "num_channels and sample_rate_hz, the detection signal from the\n"
     "detection_file_name with a specific detection_rate_hz, and the reference\n"
     "signal from the reference_file_name with sample_rate_hz, divides them\n"
     "into chunk_size_ms blocks, computes its voice value and depending on the\n"
@@ skipping 69 matching lines @@
 }
 
 // This application tests the transient suppression by providing a processed
 // PCM file, which has to be listened to in order to evaluate the
 // performance.
 // It gets an audio file, and its voice gain information, and the suppressor
 // process it giving the output file "suppressed_keystrokes.pcm".
 void void_main() {
   // TODO(aluebs): Remove all FileWrappers.
   // Prepare the input file.
-  FILE* in_file = fopen(FLAGS_in_file_name.c_str(), "rb");
+  FILE* in_file = fopen(FLAG_in_file_name, "rb");
   ASSERT_TRUE(in_file != NULL);
 
   // Prepare the detection file.
   FILE* detection_file = NULL;
-  if (!FLAGS_detection_file_name.empty()) {
-    detection_file = fopen(FLAGS_detection_file_name.c_str(), "rb");
+  if (strlen(FLAG_detection_file_name) > 0) {
+    detection_file = fopen(FLAG_detection_file_name, "rb");
   }
 
   // Prepare the reference file.
   FILE* reference_file = NULL;
-  if (!FLAGS_reference_file_name.empty()) {
-    reference_file = fopen(FLAGS_reference_file_name.c_str(), "rb");
+  if (strlen(FLAG_reference_file_name) > 0) {
+    reference_file = fopen(FLAG_reference_file_name, "rb");
   }
 
   // Prepare the output file.
   std::string out_file_name = test::OutputPath() + "suppressed_keystrokes.pcm";
   FILE* out_file = fopen(out_file_name.c_str(), "wb");
   ASSERT_TRUE(out_file != NULL);
 
-  int detection_rate_hz = FLAGS_detection_rate_hz;
+  int detection_rate_hz = FLAG_detection_rate_hz;
   if (detection_rate_hz == 0) {
-    detection_rate_hz = FLAGS_sample_rate_hz;
+    detection_rate_hz = FLAG_sample_rate_hz;
   }
 
   Agc agc;
 
   TransientSuppressor suppressor;
   suppressor.Initialize(
-      FLAGS_sample_rate_hz, detection_rate_hz, FLAGS_num_channels);
+      FLAG_sample_rate_hz, detection_rate_hz, FLAG_num_channels);
 
   const size_t audio_buffer_size =
-      FLAGS_chunk_size_ms * FLAGS_sample_rate_hz / 1000;
+      FLAG_chunk_size_ms * FLAG_sample_rate_hz / 1000;
   const size_t detection_buffer_size =
-      FLAGS_chunk_size_ms * detection_rate_hz / 1000;
+      FLAG_chunk_size_ms * detection_rate_hz / 1000;
 
   // int16 and float variants of the same data.
   std::unique_ptr<int16_t[]> audio_buffer_i(
-      new int16_t[FLAGS_num_channels * audio_buffer_size]);
+      new int16_t[FLAG_num_channels * audio_buffer_size]);
   std::unique_ptr<float[]> audio_buffer_f(
-      new float[FLAGS_num_channels * audio_buffer_size]);
+      new float[FLAG_num_channels * audio_buffer_size]);
 
   std::unique_ptr<float[]> detection_buffer, reference_buffer;
 
   if (detection_file)
     detection_buffer.reset(new float[detection_buffer_size]);
   if (reference_file)
     reference_buffer.reset(new float[audio_buffer_size]);
 
   while (ReadBuffers(in_file,
                      audio_buffer_size,
-                     FLAGS_num_channels,
+                     FLAG_num_channels,
                      audio_buffer_i.get(),
                      detection_file,
                      detection_buffer_size,
                      detection_buffer.get(),
                      reference_file,
                      reference_buffer.get())) {
     ASSERT_EQ(0,
               agc.Process(audio_buffer_i.get(),
                           static_cast<int>(audio_buffer_size),
-                          FLAGS_sample_rate_hz))
+                          FLAG_sample_rate_hz))
         << "The AGC could not process the frame";
 
-    for (size_t i = 0; i < FLAGS_num_channels * audio_buffer_size; ++i) {
+    for (size_t i = 0; i < FLAG_num_channels * audio_buffer_size; ++i) {
       audio_buffer_f[i] = audio_buffer_i[i];
     }
 
     ASSERT_EQ(0,
               suppressor.Suppress(audio_buffer_f.get(),
                                   audio_buffer_size,
-                                  FLAGS_num_channels,
+                                  FLAG_num_channels,
                                   detection_buffer.get(),
                                   detection_buffer_size,
                                   reference_buffer.get(),
                                   audio_buffer_size,
                                   agc.voice_probability(),
                                   true))
         << "The transient suppressor could not suppress the frame";
 
     // Write result to out file.
     WritePCM(
-        out_file, audio_buffer_size, FLAGS_num_channels, audio_buffer_f.get());
+        out_file, audio_buffer_size, FLAG_num_channels, audio_buffer_f.get());
   }
 
   fclose(in_file);
   if (detection_file) {
     fclose(detection_file);
   }
   if (reference_file) {
     fclose(reference_file);
   }
   fclose(out_file);
 }
 
 }  // namespace webrtc
 
 int main(int argc, char* argv[]) {
-  google::SetUsageMessage(webrtc::kUsage);
-  google::ParseCommandLineFlags(&argc, &argv, true);
+  if (rtc::FlagList::SetFlagsFromCommandLine(&argc, argv, true) ||
+      FLAG_help || argc != 1) {
+    printf("%s", webrtc::kUsage);
+    if (FLAG_help) {
+      rtc::FlagList::Print(nullptr, false);
+      return 0;
+    }
+    return 1;
+  }
+  RTC_CHECK_GT(FLAG_chunk_size_ms, 0);
+  RTC_CHECK_GT(FLAG_sample_rate_hz, 0);
+  RTC_CHECK_GT(FLAG_num_channels, 0);
+
   webrtc::void_main();
   return 0;
 }