Using ring buffer for AudioVector in NetEq.

webrtc/modules/audio_coding/neteq/background_noise.cc

Index: webrtc/modules/audio_coding/neteq/background_noise.cc
diff --git a/webrtc/modules/audio_coding/neteq/background_noise.cc b/webrtc/modules/audio_coding/neteq/background_noise.cc
index c86045eed90cbdcf62580c34301d80df433b1d59..9cfd6cb40ed7c25951ec118e78e431a6df56dafe 100644
--- a/webrtc/modules/audio_coding/neteq/background_noise.cc
+++ b/webrtc/modules/audio_coding/neteq/background_noise.cc
@@ -59,10 +59,7 @@ void BackgroundNoise::Update(const AudioMultiVector& input,
     ChannelParameters& parameters = channel_parameters_[channel_ix];
     int16_t temp_signal_array[kVecLen + kMaxLpcOrder] = {0};
     int16_t* temp_signal = &temp_signal_array[kMaxLpcOrder];
-    memcpy(temp_signal,
-           &input[channel_ix][input.Size() - kVecLen],
-           sizeof(int16_t) * kVecLen);
-
+    input[channel_ix].CopyTo(kVecLen, input.Size() - kVecLen, temp_signal);
     int32_t sample_energy = CalculateAutoCorrelation(temp_signal, kVecLen,
                                                      auto_correlation);