Remove empty-string comparisons.

webrtc/modules/audio_processing/test/audioproc_float.cc

 /*
  *  Copyright (c) 2014 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.
  */
 
@@ skipping 46 matching lines @@
     "\n"
     "All components are disabled by default. If any bi-directional components\n"
     "are enabled, only debug dump files are permitted.";
 
 }  // namespace
 
 int main(int argc, char* argv[]) {
   google::SetUsageMessage(kUsage);
   google::ParseCommandLineFlags(&argc, &argv, true);
 
-  if (!((FLAGS_i == "") ^ (FLAGS_dump == ""))) {
+  if (!((FLAGS_i.empty()) ^ (FLAGS_dump.empty()))) {
     fprintf(stderr,
             "An input file must be specified with either -i or -dump.\n");
     return 1;
   }
-  if (FLAGS_dump != "") {
+  if (!FLAGS_dump.empty()) {
     fprintf(stderr, "FIXME: the -dump option is not yet implemented.\n");
     return 1;
   }
 
   test::TraceToStderr trace_to_stderr(true);
   WavReader in_file(FLAGS_i);
   // If the output format is uninitialized, use the input format.
   const int out_channels =
       FLAGS_out_channels ? FLAGS_out_channels : in_file.num_channels();
   const int out_sample_rate =
       FLAGS_out_sample_rate ? FLAGS_out_sample_rate : in_file.sample_rate();
   WavWriter out_file(FLAGS_o, out_sample_rate, out_channels);
 
   Config config;
   config.Set<ExperimentalNs>(new ExperimentalNs(FLAGS_ts || FLAGS_all));
 
   if (FLAGS_bf || FLAGS_all) {
     const size_t num_mics = in_file.num_channels();
     const std::vector<Point> array_geometry =
         ParseArrayGeometry(FLAGS_mic_positions, num_mics);
     CHECK_EQ(array_geometry.size(), num_mics);
 
     config.Set<Beamforming>(new Beamforming(true, array_geometry));
   }
 
   rtc::scoped_ptr<AudioProcessing> ap(AudioProcessing::Create(config));
-  if (FLAGS_dump != "") {
+  if (!FLAGS_dump.empty()) {
     CHECK_EQ(kNoErr, ap->echo_cancellation()->Enable(FLAGS_aec || FLAGS_all));
   } else if (FLAGS_aec) {
     fprintf(stderr, "-aec requires a -dump file.\n");
     return -1;
   }
   CHECK_EQ(kNoErr, ap->gain_control()->Enable(FLAGS_agc || FLAGS_all));
   CHECK_EQ(kNoErr, ap->gain_control()->set_mode(GainControl::kFixedDigital));
   CHECK_EQ(kNoErr, ap->high_pass_filter()->Enable(FLAGS_hpf || FLAGS_all));
   CHECK_EQ(kNoErr, ap->noise_suppression()->Enable(FLAGS_ns || FLAGS_all));
   if (FLAGS_ns_level != -1)
@@ skipping 56 matching lines @@
            execution_time_ms * 1.f / num_chunks);
   }
   return 0;
 }
 
 }  // namespace webrtc
 
 int main(int argc, char* argv[]) {
   return webrtc::main(argc, argv);
 }