1 files changed, 80 insertions, 0 deletions
diff --git a/webrtc/base/bufferqueue.cc b/webrtc/base/bufferqueue.cc
new file mode 100644
index 0000000000..955af51f6b
--- /dev/null
+++ b/webrtc/base/bufferqueue.cc
@@ -0,0 +1,80 @@
+/*
+ *  Copyright 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/base/bufferqueue.h"
+
+namespace rtc {
+
+BufferQueue::BufferQueue(size_t capacity, size_t default_size)
+    : capacity_(capacity), default_size_(default_size) {
+}
+
+BufferQueue::~BufferQueue() {
+  CritScope cs(&crit_);
+
+  for (Buffer* buffer : queue_) {
+    delete buffer;
+  }
+  for (Buffer* buffer : free_list_) {
+    delete buffer;
+  }
+}
+
+size_t BufferQueue::size() const {
+  CritScope cs(&crit_);
+  return queue_.size();
+}
+
+bool BufferQueue::ReadFront(void* buffer, size_t bytes, size_t* bytes_read) {
+  CritScope cs(&crit_);
+  if (queue_.empty()) {
+    return false;
+  }
+
+  Buffer* packet = queue_.front();
+  queue_.pop_front();
+
+  size_t next_packet_size = packet->size();
+  if (bytes > next_packet_size) {
+    bytes = next_packet_size;
+  }
+
+  memcpy(buffer, packet->data(), bytes);
+  if (bytes_read) {
+    *bytes_read = bytes;
+  }
+  free_list_.push_back(packet);
+  return true;
+}
+
+bool BufferQueue::WriteBack(const void* buffer, size_t bytes,
+                            size_t* bytes_written) {
+  CritScope cs(&crit_);
+  if (queue_.size() == capacity_) {
+    return false;
+  }
+
+  Buffer* packet;
+  if (!free_list_.empty()) {
+    packet = free_list_.back();
+    free_list_.pop_back();
+  } else {
+    packet = new Buffer(bytes, default_size_);
+  }
+
+  packet->SetData(static_cast<const uint8_t*>(buffer), bytes);
+  if (bytes_written) {
+    *bytes_written = bytes;
+  }
+  queue_.push_back(packet);
+  return true;
+}
+
+}  // namespace rtc