Revert 290359 "Remove AudioBuffersState class."

trunk/src/media/audio/simple_sources.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 // MSVC++ requires this to be set before any other includes to get M_PI.
 #define _USE_MATH_DEFINES
 #include <cmath>
 
 #include "media/audio/simple_sources.h"
 
 #include <algorithm>
@@ skipping 11 matching lines @@
       f_(freq / sample_freq),
       time_state_(0),
       cap_(0),
       callbacks_(0),
       errors_(0) {
 }
 
 // The implementation could be more efficient if a lookup table is constructed
 // but it is efficient enough for our simple needs.
 int SineWaveAudioSource::OnMoreData(AudioBus* audio_bus,
-                                    int total_bytes_delay) {
+                                    AudioBuffersState audio_buffers) {
   base::AutoLock auto_lock(time_lock_);
   callbacks_++;
 
   // The table is filled with s(t) = kint16max*sin(Theta*t),
   // where Theta = 2*PI*fs.
   // We store the discrete time value |t| in a member to ensure that the
   // next pass starts at a correct state.
   int max_frames = cap_ > 0 ?
       std::min(audio_bus->frames(), cap_ - time_state_) : audio_bus->frames();
   for (int i = 0; i < max_frames; ++i)
@@ skipping 14 matching lines @@
   DCHECK_GT(cap, 0);
   cap_ = cap;
 }
 
 void SineWaveAudioSource::Reset() {
   base::AutoLock auto_lock(time_lock_);
   time_state_ = 0;
 }
 
 }  // namespace media