Reduce jitter from uneven SincResampler buffer size requests.

remoting/codec/audio_encoder_opus.cc

Index: remoting/codec/audio_encoder_opus.cc
diff --git a/remoting/codec/audio_encoder_opus.cc b/remoting/codec/audio_encoder_opus.cc
index 15160df75f5b0a2764137245ad472f14deb3e8d6..2efcf90f74c84cc16fc3ff595e5c6db7fce217c4 100644
--- a/remoting/codec/audio_encoder_opus.cc
+++ b/remoting/codec/audio_encoder_opus.cc
@@ -77,9 +77,12 @@ void AudioEncoderOpus::InitEncoder() {
   if (sampling_rate_ != kOpusSamplingRate) {
     resample_buffer_.reset(
         new char[kFrameSamples * kBytesPerSample * channels_]);
+    // TODO(sergeyu): Figure out the right buffer size to use per packet instead
+    // of using media::SincResampler::kDefaultRequestSize.
     resampler_.reset(new media::MultiChannelResampler(
         channels_,
         static_cast<double>(sampling_rate_) / kOpusSamplingRate,
+        media::SincResampler::kDefaultRequestSize,
         base::Bind(&AudioEncoderOpus::FetchBytesToResample,
                    base::Unretained(this))));
     resampler_bus_ = media::AudioBus::Create(channels_, kFrameSamples);
@@ -88,7 +91,7 @@ void AudioEncoderOpus::InitEncoder() {
   // Drop leftover data because it's for different sampling rate.
   leftover_samples_ = 0;
   leftover_buffer_size_ =
-      frame_size_ + media::SincResampler::kMaximumLookAheadSize;
+      frame_size_ + media::SincResampler::kDefaultRequestSize;
   leftover_buffer_.reset(
       new int16[leftover_buffer_size_ * channels_]);
 }
@@ -159,7 +162,7 @@ scoped_ptr<AudioPacket> AudioEncoderOpus::Encode(
   encoded_packet->set_channels(channels_);
 
   int prefetch_samples =
-      resampler_.get() ? media::SincResampler::kMaximumLookAheadSize : 0;
+      resampler_.get() ? media::SincResampler::kDefaultRequestSize : 0;
   int samples_wanted = frame_size_ + prefetch_samples;
 
   while (leftover_samples_ + samples_in_packet >= samples_wanted) {
@@ -181,7 +184,7 @@ scoped_ptr<AudioPacket> AudioEncoderOpus::Encode(
       resampling_data_ = reinterpret_cast<const char*>(pcm_buffer);
       resampling_data_pos_ = 0;
       resampling_data_size_ = samples_wanted * channels_ * kBytesPerSample;
-      resampler_->Resample(resampler_bus_.get(), kFrameSamples);
+      resampler_->Resample(kFrameSamples, resampler_bus_.get());
       resampling_data_ = NULL;
       samples_consumed = resampling_data_pos_ / channels_ / kBytesPerSample;