Revert of Moved ring-buffer related files from common_audio to audio_processing"

webrtc/common_audio/audio_ring_buffer.cc

Index: webrtc/common_audio/audio_ring_buffer.cc
diff --git a/webrtc/common_audio/audio_ring_buffer.cc b/webrtc/common_audio/audio_ring_buffer.cc
new file mode 100644
index 0000000000000000000000000000000000000000..a29e53a61c626d7134302caefcc2354e5e0d0adf
--- /dev/null
+++ b/webrtc/common_audio/audio_ring_buffer.cc
@@ -0,0 +1,75 @@
+/*
+ *  Copyright (c) 2015 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.
+ */
+
+#include "webrtc/common_audio/audio_ring_buffer.h"
+
+#include "webrtc/base/checks.h"
+#include "webrtc/common_audio/ring_buffer.h"
+
+// This is a simple multi-channel wrapper over the ring_buffer.h C interface.
+
+namespace webrtc {
+
+AudioRingBuffer::AudioRingBuffer(size_t channels, size_t max_frames) {
+  buffers_.reserve(channels);
+  for (size_t i = 0; i < channels; ++i)
+    buffers_.push_back(WebRtc_CreateBuffer(max_frames, sizeof(float)));
+}
+
+AudioRingBuffer::~AudioRingBuffer() {
+  for (auto buf : buffers_)
+    WebRtc_FreeBuffer(buf);
+}
+
+void AudioRingBuffer::Write(const float* const* data, size_t channels,
+                            size_t frames) {
+  RTC_DCHECK_EQ(buffers_.size(), channels);
+  for (size_t i = 0; i < channels; ++i) {
+    const size_t written = WebRtc_WriteBuffer(buffers_[i], data[i], frames);
+    RTC_CHECK_EQ(written, frames);
+  }
+}
+
+void AudioRingBuffer::Read(float* const* data, size_t channels, size_t frames) {
+  RTC_DCHECK_EQ(buffers_.size(), channels);
+  for (size_t i = 0; i < channels; ++i) {
+    const size_t read =
+        WebRtc_ReadBuffer(buffers_[i], nullptr, data[i], frames);
+    RTC_CHECK_EQ(read, frames);
+  }
+}
+
+size_t AudioRingBuffer::ReadFramesAvailable() const {
+  // All buffers have the same amount available.
+  return WebRtc_available_read(buffers_[0]);
+}
+
+size_t AudioRingBuffer::WriteFramesAvailable() const {
+  // All buffers have the same amount available.
+  return WebRtc_available_write(buffers_[0]);
+}
+
+void AudioRingBuffer::MoveReadPositionForward(size_t frames) {
+  for (auto buf : buffers_) {
+    const size_t moved =
+        static_cast<size_t>(WebRtc_MoveReadPtr(buf, static_cast<int>(frames)));
+    RTC_CHECK_EQ(moved, frames);
+  }
+}
+
+void AudioRingBuffer::MoveReadPositionBackward(size_t frames) {
+  for (auto buf : buffers_) {
+    const size_t moved = static_cast<size_t>(
+        -WebRtc_MoveReadPtr(buf, -static_cast<int>(frames)));
+    RTC_CHECK_EQ(moved, frames);
+  }
+}
+
+}  // namespace webrtc