Convert channel counts to size_t.

webrtc/common_audio/wav_file_unittest.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 12 matching lines @@
 
 static const float kSamples[] = {0.0, 10.0, 4e4, -1e9};
 
 // Write a tiny WAV file with the C++ interface and verify the result.
 TEST(WavWriterTest, CPP) {
   const std::string outfile = test::OutputPath() + "wavtest1.wav";
   static const size_t kNumSamples = 3;
   {
     WavWriter w(outfile, 14099, 1);
     EXPECT_EQ(14099, w.sample_rate());
-    EXPECT_EQ(1, w.num_channels());
+    EXPECT_EQ(1u, w.num_channels());
     EXPECT_EQ(0u, w.num_samples());
     w.WriteSamples(kSamples, kNumSamples);
     EXPECT_EQ(kNumSamples, w.num_samples());
   }
   // Write some extra "metadata" to the file that should be silently ignored
   // by WavReader. We don't use WavWriter directly for this because it doesn't
   // support metadata.
   static const uint8_t kMetadata[] = {101, 202};
   {
     FILE* f = fopen(outfile.c_str(), "ab");
@@ skipping 27 matching lines @@
   FILE* f = fopen(outfile.c_str(), "rb");
   ASSERT_TRUE(f);
   uint8_t contents[kContentSize];
   ASSERT_EQ(1u, fread(contents, kContentSize, 1, f));
   EXPECT_EQ(0, fclose(f));
   EXPECT_EQ(0, memcmp(kExpectedContents, contents, kContentSize));
 
   {
     WavReader r(outfile);
     EXPECT_EQ(14099, r.sample_rate());
-    EXPECT_EQ(1, r.num_channels());
+    EXPECT_EQ(1u, r.num_channels());
     EXPECT_EQ(kNumSamples, r.num_samples());
     static const float kTruncatedSamples[] = {0.0, 10.0, 32767.0};
     float samples[kNumSamples];
     EXPECT_EQ(kNumSamples, r.ReadSamples(kNumSamples, samples));
     EXPECT_EQ(0, memcmp(kTruncatedSamples, samples, sizeof(samples)));
     EXPECT_EQ(0u, r.ReadSamples(kNumSamples, samples));
   }
 }
 
 // Write a tiny WAV file with the C interface and verify the result.
 TEST(WavWriterTest, C) {
   const std::string outfile = test::OutputPath() + "wavtest2.wav";
   rtc_WavWriter* w = rtc_WavOpen(outfile.c_str(), 11904, 2);
   EXPECT_EQ(11904, rtc_WavSampleRate(w));
-  EXPECT_EQ(2, rtc_WavNumChannels(w));
+  EXPECT_EQ(2u, rtc_WavNumChannels(w));
   EXPECT_EQ(0u, rtc_WavNumSamples(w));
   static const size_t kNumSamples = 4;
   rtc_WavWriteSamples(w, &kSamples[0], 2);
   EXPECT_EQ(2u, rtc_WavNumSamples(w));
   rtc_WavWriteSamples(w, &kSamples[2], kNumSamples - 2);
   EXPECT_EQ(kNumSamples, rtc_WavNumSamples(w));
   rtc_WavClose(w);
   static const uint8_t kExpectedContents[] = {
     'R', 'I', 'F', 'F',
     44, 0, 0, 0,  // size of whole file - 8: 8 + 44 - 8
@@ skipping 22 matching lines @@
   uint8_t contents[kContentSize];
   ASSERT_EQ(1u, fread(contents, kContentSize, 1, f));
   EXPECT_EQ(0, fclose(f));
   EXPECT_EQ(0, memcmp(kExpectedContents, contents, kContentSize));
 }
 
 // Write a larger WAV file. You can listen to this file to sanity-check it.
 TEST(WavWriterTest, LargeFile) {
   std::string outfile = test::OutputPath() + "wavtest3.wav";
   static const int kSampleRate = 8000;
-  static const int kNumChannels = 2;
+  static const size_t kNumChannels = 2;
   static const size_t kNumSamples = 3 * kSampleRate * kNumChannels;
   float samples[kNumSamples];
   for (size_t i = 0; i < kNumSamples; i += kNumChannels) {
     // A nice periodic beeping sound.
     static const double kToneHz = 440;
     const double t = static_cast<double>(i) / (kNumChannels * kSampleRate);
     const double x =
         std::numeric_limits<int16_t>::max() * std::sin(t * kToneHz * 2 * M_PI);
     samples[i] = std::pow(std::sin(t * 2 * 2 * M_PI), 10) * x;
     samples[i + 1] = std::pow(std::cos(t * 2 * 2 * M_PI), 10) * x;
@@ skipping 18 matching lines @@
     float read_samples[kNumSamples];
     EXPECT_EQ(kNumSamples, r.ReadSamples(kNumSamples, read_samples));
     for (size_t i = 0; i < kNumSamples; ++i)
       EXPECT_NEAR(samples[i], read_samples[i], 1);
 
     EXPECT_EQ(0u, r.ReadSamples(kNumSamples, read_samples));
   }
 }
 
 }  // namespace webrtc