Implementation of MediaCodecPlayer stage 1

media/base/android/access_unit_queue.h

Index: media/base/android/access_unit_queue.h
diff --git a/media/base/android/access_unit_queue.h b/media/base/android/access_unit_queue.h
new file mode 100644
index 0000000000000000000000000000000000000000..1e4311e3491923eadf0826f4515094f32b25b0b0
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+++ b/media/base/android/access_unit_queue.h
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+// Copyright 2015 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.
+
+#ifndef MEDIA_BASE_ANDROID_ACCESS_UNIT_QUEUE_H_
+#define MEDIA_BASE_ANDROID_ACCESS_UNIT_QUEUE_H_
+
+#include <deque>
+
+#include "base/macros.h"
+#include "base/synchronization/lock.h"
+#include "media/base/android/demuxer_stream_player_params.h"
+
+namespace media {
+
+class AccessUnitQueue {
+ public:
+  struct Info {
+    const AccessUnit* front_unit;
+    const DemuxerConfigs* configs;
+    int length;
+    bool has_eos;
+
+    Info()
+        : front_unit(nullptr), configs(nullptr), length(0), has_eos(false) {}
+  };
+
+  AccessUnitQueue();
+  virtual ~AccessUnitQueue();
+
+  void PushBack(const DemuxerData& frames);
+  void PopFront();
+  void Flush();
+
+  // Looks for the first key frame and if it exists,
+  // removes prior frames and returns true. If it does not
+  // exist returns false.
+  bool SkipToKeyFrame();
+
+  void GetInfo(Info* info) const;
+
+  bool HasEOS() const;
+  int Length() const;
+
+ private:
+  std::deque<AccessUnit> access_units_;
+  std::deque<DemuxerConfigs> demuxer_configs_;
+  bool has_eos_;
+
+  mutable base::Lock lock_;
+
+  DISALLOW_COPY_AND_ASSIGN(AccessUnitQueue);
+};
+
+}  // namespace media
+
+// For logging
+std::ostream& operator<<(std::ostream& os, const media::AccessUnit& au);
+
+#endif  // MEDIA_BASE_ANDROID_ACCESS_UNIT_QUEUE_H_