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// Copyright (c) 2012 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.
// A simple implementation of Buffer that takes ownership of the given data
// pointer.
//
// DataBuffer assumes that memory was allocated with new uint8[].
#ifndef MEDIA_BASE_DATA_BUFFER_H_
#define MEDIA_BASE_DATA_BUFFER_H_
#include "base/memory/scoped_ptr.h"
#include "media/base/buffers.h"
namespace media {
class MEDIA_EXPORT DataBuffer : public Buffer {
public:
// Assumes valid data of size |buffer_size|.
DataBuffer(scoped_array<uint8> buffer, int buffer_size);
// Allocates buffer of size |buffer_size|. If |buffer_size| is 0, |data_| is
// set to a NULL ptr.
explicit DataBuffer(int buffer_size);
// Create a DataBuffer whose |data_| is copied from |data|.
static scoped_refptr<DataBuffer> CopyFrom(const uint8* data, int size);
// Buffer implementation.
virtual const uint8* GetData() const OVERRIDE;
virtual int GetDataSize() const OVERRIDE;
// Returns a read-write pointer to the buffer data.
virtual uint8* GetWritableData();
// Updates the size of valid data in bytes, which must be less than or equal
// to GetBufferSize().
virtual void SetDataSize(int data_size);
// Returns the size of the underlying buffer.
virtual int GetBufferSize() const;
protected:
// Copies from [data,data+size) to owned array.
DataBuffer(const uint8* data, int size);
virtual ~DataBuffer();
private:
// Constructor helper method for memory allocations.
void Initialize();
scoped_array<uint8> data_;
int buffer_size_;
int data_size_;
DISALLOW_COPY_AND_ASSIGN(DataBuffer);
};
} // namespace media
#endif // MEDIA_BASE_DATA_BUFFER_H_
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