Revert of MediaStream audio: Refactor 3 separate "glue" implementations into one.

content/renderer/media/webrtc/webrtc_audio_sink_adapter.cc

Index: content/renderer/media/webrtc/webrtc_audio_sink_adapter.cc
diff --git a/content/renderer/media/webrtc/webrtc_audio_sink_adapter.cc b/content/renderer/media/webrtc/webrtc_audio_sink_adapter.cc
new file mode 100644
index 0000000000000000000000000000000000000000..2679aff9648a438574fc06749be4af57b5e724fb
--- /dev/null
+++ b/content/renderer/media/webrtc/webrtc_audio_sink_adapter.cc
@@ -0,0 +1,51 @@
+// Copyright 2014 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.
+
+#include "base/logging.h"
+#include "content/renderer/media/webrtc/webrtc_audio_sink_adapter.h"
+#include "media/base/audio_bus.h"
+#include "third_party/webrtc/api/mediastreaminterface.h"
+
+namespace content {
+
+WebRtcAudioSinkAdapter::WebRtcAudioSinkAdapter(
+    webrtc::AudioTrackSinkInterface* sink)
+    : sink_(sink) {
+  DCHECK(sink);
+}
+
+WebRtcAudioSinkAdapter::~WebRtcAudioSinkAdapter() {
+}
+
+bool WebRtcAudioSinkAdapter::IsEqual(
+    const webrtc::AudioTrackSinkInterface* other) const {
+  return (other == sink_);
+}
+
+void WebRtcAudioSinkAdapter::OnData(const media::AudioBus& audio_bus,
+                                    base::TimeTicks estimated_capture_time) {
+  DCHECK_EQ(audio_bus.frames(), params_.frames_per_buffer());
+  DCHECK_EQ(audio_bus.channels(), params_.channels());
+  // TODO(henrika): Remove this conversion once the interface in libjingle
+  // supports float vectors.
+  audio_bus.ToInterleaved(audio_bus.frames(),
+                          sizeof(interleaved_data_[0]),
+                          interleaved_data_.get());
+  sink_->OnData(interleaved_data_.get(),
+                16,
+                params_.sample_rate(),
+                audio_bus.channels(),
+                audio_bus.frames());
+}
+
+void WebRtcAudioSinkAdapter::OnSetFormat(
+    const media::AudioParameters& params) {
+  DCHECK(params.IsValid());
+  params_ = params;
+  const int num_pcm16_data_elements =
+      params_.frames_per_buffer() * params_.channels();
+  interleaved_data_.reset(new int16_t[num_pcm16_data_elements]);
+}
+
+}  // namespace content