Change name of files and class in agc/histogram* in order to avoid file-name clash.

webrtc/modules/audio_processing/agc/loudness_histogram_unittest.cc

 /*
  *  Copyright (c) 2012 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.
  */
 
 // Use CreateHistUnittestFile.m to generate the input file.
 
-#include "webrtc/modules/audio_processing/agc/histogram.h"
+#include "webrtc/modules/audio_processing/agc/loudness_histogram.h"
 
 #include <stdio.h>
+#include <algorithm>
 #include <cmath>
 #include <memory>
 
 #include "gtest/gtest.h"
 #include "webrtc/test/testsupport/fileutils.h"
 #include "webrtc/modules/audio_processing/agc/utility.h"
 
 namespace webrtc {
 
 struct InputOutput {
   double rms;
   double activity_probability;
   double audio_content;
   double loudness;
 };
 
 const double kRelativeErrTol = 1e-10;
 
-class HistogramTest : public ::testing::Test {
+class LoudnessHistogramTest : public ::testing::Test {
  protected:
-  void RunTest(bool enable_circular_buff,
-               const char* filename);
+  void RunTest(bool enable_circular_buff, const char* filename);
 
  private:
   void TestClean();
-  std::unique_ptr<Histogram> hist_;
+  std::unique_ptr<LoudnessHistogram> hist_;
 };
 
-void HistogramTest::TestClean() {
+void LoudnessHistogramTest::TestClean() {
   EXPECT_EQ(hist_->CurrentRms(), 7.59621091765857e-02);
   EXPECT_EQ(hist_->AudioContent(), 0);
   EXPECT_EQ(hist_->num_updates(), 0);
 }
 
-void HistogramTest::RunTest(bool enable_circular_buff, const char* filename) {
+void LoudnessHistogramTest::RunTest(bool enable_circular_buff,
+                                    const char* filename) {
   FILE* in_file = fopen(filename, "rb");
   ASSERT_TRUE(in_file != NULL);
   if (enable_circular_buff) {
     int buffer_size;
     EXPECT_EQ(fread(&buffer_size, sizeof(buffer_size), 1, in_file), 1u);
-    hist_.reset(Histogram::Create(buffer_size));
+    hist_.reset(LoudnessHistogram::Create(buffer_size));
   } else {
-    hist_.reset(Histogram::Create());
+    hist_.reset(LoudnessHistogram::Create());
   }
   TestClean();
 
   InputOutput io;
   int num_updates = 0;
   int num_reset = 0;
   while (fread(&io, sizeof(InputOutput), 1, in_file) == 1) {
     if (io.rms < 0) {
       // We have to reset.
       hist_->Reset();
       TestClean();
       num_updates = 0;
       num_reset++;
       // Read the next chunk of input.
       if (fread(&io, sizeof(InputOutput), 1, in_file) != 1)
         break;
     }
     hist_->Update(io.rms, io.activity_probability);
     num_updates++;
     EXPECT_EQ(hist_->num_updates(), num_updates);
     double audio_content = hist_->AudioContent();
 
-    double abs_err = std::min(audio_content, io.audio_content) *
-        kRelativeErrTol;
+    double abs_err =
+        std::min(audio_content, io.audio_content) * kRelativeErrTol;
 
     ASSERT_NEAR(audio_content, io.audio_content, abs_err);
     double current_loudness = Linear2Loudness(hist_->CurrentRms());
-    abs_err = std::min(fabs(current_loudness), fabs(io.loudness)) *
-        kRelativeErrTol;
+    abs_err =
+        std::min(fabs(current_loudness), fabs(io.loudness)) * kRelativeErrTol;
     ASSERT_NEAR(current_loudness, io.loudness, abs_err);
   }
   fclose(in_file);
 }
 
-TEST_F(HistogramTest, ActiveCircularBuffer) {
-  RunTest(true,
-          test::ResourcePath("audio_processing/agc/agc_with_circular_buffer",
-                             "dat").c_str());
+TEST_F(LoudnessHistogramTest, ActiveCircularBuffer) {
+  RunTest(true, test::ResourcePath(
+                    "audio_processing/agc/agc_with_circular_buffer", "dat")
+                    .c_str());
 }
 
-TEST_F(HistogramTest, InactiveCircularBuffer) {
-  RunTest(false,
-          test::ResourcePath("audio_processing/agc/agc_no_circular_buffer",
-                             "dat").c_str());
+TEST_F(LoudnessHistogramTest, InactiveCircularBuffer) {
+  RunTest(false, test::ResourcePath(
+                     "audio_processing/agc/agc_no_circular_buffer", "dat")
+                     .c_str());
 }
 
 }  // namespace webrtc