Update a ton of audio code to use size_t more correctly and in general reduce

webrtc/modules/audio_coding/codecs/cng/audio_encoder_cng_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 41 matching lines @@
     cng_.reset();
     // Don't expect the cng_ object to delete the AudioEncoder object. But it
     // will be deleted with the test fixture. This is why we explicitly delete
     // the cng_ object above, and set expectations on mock_encoder_ afterwards.
     EXPECT_CALL(mock_encoder_, Die()).Times(1);
   }
 
   void CreateCng() {
     // The config_ parameters may be changed by the TEST_Fs up until CreateCng()
     // is called, thus we cannot use the values until now.
-    num_audio_samples_10ms_ = 10 * sample_rate_hz_ / 1000;
+    num_audio_samples_10ms_ = static_cast<size_t>(10 * sample_rate_hz_ / 1000);
     ASSERT_LE(num_audio_samples_10ms_, kMaxNumSamples);
     EXPECT_CALL(mock_encoder_, SampleRateHz())
         .WillRepeatedly(Return(sample_rate_hz_));
     // Max10MsFramesInAPacket() is just used to verify that the SID frame period
     // is not too small. The return value does not matter that much, as long as
     // it is smaller than 10.
-    EXPECT_CALL(mock_encoder_, Max10MsFramesInAPacket()).WillOnce(Return(1));
+    EXPECT_CALL(mock_encoder_, Max10MsFramesInAPacket()).WillOnce(Return(1u));
     EXPECT_CALL(mock_encoder_, MaxEncodedBytes())
         .WillRepeatedly(Return(kMockMaxEncodedBytes));
     cng_.reset(new AudioEncoderCng(config_));
     encoded_.resize(cng_->MaxEncodedBytes(), 0);
   }
 
   void Encode() {
     ASSERT_TRUE(cng_) << "Must call CreateCng() first.";
     encoded_info_ = cng_->Encode(timestamp_, audio_, num_audio_samples_10ms_,
                                  encoded_.size(), &encoded_[0]);
     timestamp_ += static_cast<uint32_t>(num_audio_samples_10ms_);
   }
 
   // Expect |num_calls| calls to the encoder, all successful. The last call
   // claims to have encoded |kMockMaxEncodedBytes| bytes, and all the preceding
   // ones 0 bytes.
-  void ExpectEncodeCalls(int num_calls) {
+  void ExpectEncodeCalls(size_t num_calls) {
     InSequence s;
     AudioEncoder::EncodedInfo info;
-    for (int j = 0; j < num_calls - 1; ++j) {
+    for (size_t j = 0; j < num_calls - 1; ++j) {
       EXPECT_CALL(mock_encoder_, EncodeInternal(_, _, _, _))
           .WillOnce(Return(info));
     }
     info.encoded_bytes = kMockReturnEncodedBytes;
     EXPECT_CALL(mock_encoder_, EncodeInternal(_, _, _, _))
         .WillOnce(Return(info));
   }
 
   // Verifies that the cng_ object waits until it has collected
   // |blocks_per_frame| blocks of audio, and then dispatches all of them to
   // the underlying codec (speech or cng).
-  void CheckBlockGrouping(int blocks_per_frame, bool active_speech) {
+  void CheckBlockGrouping(size_t blocks_per_frame, bool active_speech) {
     EXPECT_CALL(mock_encoder_, Num10MsFramesInNextPacket())
         .WillRepeatedly(Return(blocks_per_frame));
     CreateCng();
     EXPECT_CALL(*mock_vad_, VoiceActivity(_, _, _))
         .WillRepeatedly(Return(active_speech ? Vad::kActive : Vad::kPassive));
 
     // Don't expect any calls to the encoder yet.
     EXPECT_CALL(mock_encoder_, EncodeInternal(_, _, _, _)).Times(0);
-    for (int i = 0; i < blocks_per_frame - 1; ++i) {
+    for (size_t i = 0; i < blocks_per_frame - 1; ++i) {
       Encode();
       EXPECT_EQ(0u, encoded_info_.encoded_bytes);
     }
     if (active_speech)
       ExpectEncodeCalls(blocks_per_frame);
     Encode();
     if (active_speech) {
       EXPECT_EQ(kMockReturnEncodedBytes, encoded_info_.encoded_bytes);
     } else {
       EXPECT_EQ(static_cast<size_t>(config_.num_cng_coefficients + 1),
                 encoded_info_.encoded_bytes);
     }
   }
 
   // Verifies that the audio is partitioned into larger blocks before calling
   // the VAD.
   void CheckVadInputSize(int input_frame_size_ms,
                          int expected_first_block_size_ms,
                          int expected_second_block_size_ms) {
-    const int blocks_per_frame = input_frame_size_ms / 10;
+    const size_t blocks_per_frame =
+        static_cast<size_t>(input_frame_size_ms / 10);
 
     EXPECT_CALL(mock_encoder_, Num10MsFramesInNextPacket())
         .WillRepeatedly(Return(blocks_per_frame));
 
     // Expect nothing to happen before the last block is sent to cng_.
     EXPECT_CALL(*mock_vad_, VoiceActivity(_, _, _)).Times(0);
-    for (int i = 0; i < blocks_per_frame - 1; ++i) {
+    for (size_t i = 0; i < blocks_per_frame - 1; ++i) {
       Encode();
     }
 
     // Let the VAD decision be passive, since an active decision may lead to
     // early termination of the decision loop.
     InSequence s;
     EXPECT_CALL(
         *mock_vad_,
         VoiceActivity(_, expected_first_block_size_ms * sample_rate_hz_ / 1000,
                       sample_rate_hz_)).WillOnce(Return(Vad::kPassive));
     if (expected_second_block_size_ms > 0) {
       EXPECT_CALL(*mock_vad_,
                   VoiceActivity(
                       _, expected_second_block_size_ms * sample_rate_hz_ / 1000,
                       sample_rate_hz_)).WillOnce(Return(Vad::kPassive));
     }
 
     // With this call to Encode(), |mock_vad_| should be called according to the
     // above expectations.
     Encode();
   }
 
   // Tests a frame with both active and passive speech. Returns true if the
   // decision was active speech, false if it was passive.
   bool CheckMixedActivePassive(Vad::Activity first_type,
                                Vad::Activity second_type) {
     // Set the speech encoder frame size to 60 ms, to ensure that the VAD will
     // be called twice.
-    const int blocks_per_frame = 6;
+    const size_t blocks_per_frame = 6;
     EXPECT_CALL(mock_encoder_, Num10MsFramesInNextPacket())
         .WillRepeatedly(Return(blocks_per_frame));
     InSequence s;
     EXPECT_CALL(*mock_vad_, VoiceActivity(_, _, _))
         .WillOnce(Return(first_type));
     if (first_type == Vad::kPassive) {
       // Expect a second call to the VAD only if the first frame was passive.
       EXPECT_CALL(*mock_vad_, VoiceActivity(_, _, _))
           .WillOnce(Return(second_type));
     }
     encoded_info_.payload_type = 0;
-    for (int i = 0; i < blocks_per_frame; ++i) {
+    for (size_t i = 0; i < blocks_per_frame; ++i) {
       Encode();
     }
     return encoded_info_.payload_type != kCngPayloadType;
   }
 
   AudioEncoderCng::Config config_;
   rtc::scoped_ptr<AudioEncoderCng> cng_;
   MockAudioEncoder mock_encoder_;
   MockVad* mock_vad_;  // Ownership is transferred to |cng_|.
   uint32_t timestamp_;
   int16_t audio_[kMaxNumSamples];
   size_t num_audio_samples_10ms_;
   std::vector<uint8_t> encoded_;
   AudioEncoder::EncodedInfo encoded_info_;
   int sample_rate_hz_;
 };
 
 TEST_F(AudioEncoderCngTest, CreateAndDestroy) {
   CreateCng();
 }
 
 TEST_F(AudioEncoderCngTest, CheckFrameSizePropagation) {
   CreateCng();
-  EXPECT_CALL(mock_encoder_, Num10MsFramesInNextPacket()).WillOnce(Return(17));
-  EXPECT_EQ(17, cng_->Num10MsFramesInNextPacket());
+  EXPECT_CALL(mock_encoder_, Num10MsFramesInNextPacket()).WillOnce(Return(17U));
+  EXPECT_EQ(17U, cng_->Num10MsFramesInNextPacket());
 }
 
 TEST_F(AudioEncoderCngTest, CheckChangeBitratePropagation) {
   CreateCng();
   EXPECT_CALL(mock_encoder_, SetTargetBitrate(4711));
   cng_->SetTargetBitrate(4711);
 }
 
 TEST_F(AudioEncoderCngTest, CheckProjectedPacketLossRatePropagation) {
   CreateCng();
   EXPECT_CALL(mock_encoder_, SetProjectedPacketLossRate(0.5));
   cng_->SetProjectedPacketLossRate(0.5);
 }
 
 TEST_F(AudioEncoderCngTest, EncodeCallsVad) {
   EXPECT_CALL(mock_encoder_, Num10MsFramesInNextPacket())
-      .WillRepeatedly(Return(1));
+      .WillRepeatedly(Return(1U));
   CreateCng();
   EXPECT_CALL(*mock_vad_, VoiceActivity(_, _, _))
       .WillOnce(Return(Vad::kPassive));
   Encode();
 }
 
 TEST_F(AudioEncoderCngTest, EncodeCollects1BlockPassiveSpeech) {
   CheckBlockGrouping(1, false);
 }
 
@@ skipping 11 matching lines @@
 
 TEST_F(AudioEncoderCngTest, EncodeCollects2BlocksActiveSpeech) {
   CheckBlockGrouping(2, true);
 }
 
 TEST_F(AudioEncoderCngTest, EncodeCollects3BlocksActiveSpeech) {
   CheckBlockGrouping(3, true);
 }
 
 TEST_F(AudioEncoderCngTest, EncodePassive) {
-  const int kBlocksPerFrame = 3;
+  const size_t kBlocksPerFrame = 3;
   EXPECT_CALL(mock_encoder_, Num10MsFramesInNextPacket())
       .WillRepeatedly(Return(kBlocksPerFrame));
   CreateCng();
   EXPECT_CALL(*mock_vad_, VoiceActivity(_, _, _))
       .WillRepeatedly(Return(Vad::kPassive));
   // Expect no calls at all to the speech encoder mock.
   EXPECT_CALL(mock_encoder_, EncodeInternal(_, _, _, _)).Times(0);
   uint32_t expected_timestamp = timestamp_;
-  for (int i = 0; i < 100; ++i) {
+  for (size_t i = 0; i < 100; ++i) {
     Encode();
     // Check if it was time to call the cng encoder. This is done once every
     // |kBlocksPerFrame| calls.
     if ((i + 1) % kBlocksPerFrame == 0) {
       // Now check if a SID interval has elapsed.
       if ((i % (config_.sid_frame_interval_ms / 10)) < kBlocksPerFrame) {
         // If so, verify that we got a CNG encoding.
         EXPECT_EQ(kCngPayloadType, encoded_info_.payload_type);
         EXPECT_FALSE(encoded_info_.speech);
         EXPECT_EQ(static_cast<size_t>(config_.num_cng_coefficients) + 1,
@@ skipping 60 matching lines @@
 }
 TEST_F(AudioEncoderCngTest, VadInputSize60Ms) {
   CreateCng();
   CheckVadInputSize(60, 30, 30);
 }
 
 // Verifies that the correct payload type is set when CNG is encoded.
 TEST_F(AudioEncoderCngTest, VerifyCngPayloadType) {
   CreateCng();
   EXPECT_CALL(mock_encoder_, EncodeInternal(_, _, _, _)).Times(0);
-  EXPECT_CALL(mock_encoder_, Num10MsFramesInNextPacket()).WillOnce(Return(1));
+  EXPECT_CALL(mock_encoder_, Num10MsFramesInNextPacket()).WillOnce(Return(1U));
   EXPECT_CALL(*mock_vad_, VoiceActivity(_, _, _))
       .WillOnce(Return(Vad::kPassive));
   encoded_info_.payload_type = 0;
   Encode();
   EXPECT_EQ(kCngPayloadType, encoded_info_.payload_type);
 }
 
 // Verifies that a SID frame is encoded immediately as the signal changes from
 // active speech to passive.
 TEST_F(AudioEncoderCngTest, VerifySidFrameAfterSpeech) {
   CreateCng();
   EXPECT_CALL(mock_encoder_, Num10MsFramesInNextPacket())
-      .WillRepeatedly(Return(1));
+      .WillRepeatedly(Return(1U));
   // Start with encoding noise.
   EXPECT_CALL(*mock_vad_, VoiceActivity(_, _, _))
       .Times(2)
       .WillRepeatedly(Return(Vad::kPassive));
   Encode();
   EXPECT_EQ(kCngPayloadType, encoded_info_.payload_type);
   EXPECT_EQ(static_cast<size_t>(config_.num_cng_coefficients) + 1,
             encoded_info_.encoded_bytes);
   // Encode again, and make sure we got no frame at all (since the SID frame
   // period is 100 ms by default).
@@ skipping 70 matching lines @@
 TEST_F(AudioEncoderCngDeathTest, Stereo) {
   EXPECT_CALL(mock_encoder_, NumChannels()).WillRepeatedly(Return(2));
   EXPECT_DEATH(CreateCng(), "Invalid configuration");
   config_.num_channels = 2;
   EXPECT_DEATH(CreateCng(), "Invalid configuration");
 }
 
 TEST_F(AudioEncoderCngDeathTest, EncoderFrameSizeTooLarge) {
   CreateCng();
   EXPECT_CALL(mock_encoder_, Num10MsFramesInNextPacket())
-      .WillRepeatedly(Return(7));
+      .WillRepeatedly(Return(7U));
   for (int i = 0; i < 6; ++i)
     Encode();
   EXPECT_DEATH(Encode(),
                "Frame size cannot be larger than 60 ms when using VAD/CNG.");
 }
 
 #endif  // GTEST_HAS_DEATH_TEST
 
 }  // namespace webrtc