Add allocator interface for use by cdm_adapter

media/cdm/simple_cdm_allocator.h

+// Copyright 2016 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_CDM_SIMPLE_CDM_ALLOCATOR_H_
+#define MEDIA_CDM_SIMPLE_CDM_ALLOCATOR_H_
+
+#include <stdint.h>
+
+#include "base/macros.h"
+#include "media/base/media_export.h"
+#include "media/cdm/cdm_allocator.h"
+
+namespace media {
+
+// This is a simple CdmAllocator that simply allocates a new
+// SimpleCdmBuffer on every Allocate() request. It does not keep track
+// of the memory allocated. The caller is responsible for calling Release()

[xhwang, 2016/02/12 08:45:30]

which Release()?

[jrummell, 2016/02/12 23:14:20]

s/b Destroy(). Done.

+// on the buffer when it is no longer needed.
+class MEDIA_EXPORT SimpleCdmAllocator : public CdmAllocator {
+ public:
+  SimpleCdmAllocator();
+  ~SimpleCdmAllocator() override;

[xhwang, 2016/02/12 08:45:30]

nit: s/override/final to be consistent.

[jrummell, 2016/02/12 23:14:20]

Done.

+
+  // CdmAllocator implementation.
+  cdm::Buffer* Allocate(uint32_t capacity) final;
+  scoped_ptr<VideoFrameImpl> CreateCdmVideoFrame() final;
+
+ private:
+  DISALLOW_COPY_AND_ASSIGN(SimpleCdmAllocator);
+};
+
+}  // namespace media
+
+#endif  // MEDIA_CDM_SIMPLE_CDM_ALLOCATOR_H_