63 lines
1.4 KiB
C
63 lines
1.4 KiB
C
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// Copyright (c) 2013 Google Inc. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#ifndef MEDIA_MP4_BOX_H_
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#define MEDIA_MP4_BOX_H_
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#include "base/basictypes.h"
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#include "base/compiler_specific.h"
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#include "media/mp4/fourccs.h"
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namespace media {
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class BufferWriter;
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namespace mp4 {
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class BoxBuffer;
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class BoxReader;
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// Defines Box and FullBox, the two base ISO BMFF box objects as defined in
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// ISO 14496-12:2012 ISO BMFF section 4.2. All ISO BMFF compatible boxes
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// inherits either Box or FullBox.
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struct Box {
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public:
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Box();
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virtual ~Box();
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bool Parse(BoxReader* reader);
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// Write the box to buffer.
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// The function calls ComputeSize internally to compute box size.
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void Write(BufferWriter* writer);
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// Computer box size.
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// The calculated size will be saved in |atom_size| for consumption later.
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virtual uint32 ComputeSize() = 0;
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virtual FourCC BoxType() const = 0;
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protected:
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friend class BoxBuffer;
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// Read or write the mp4 box through BoxBuffer.
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virtual bool ReadWrite(BoxBuffer* buffer);
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// We don't support 64-bit atom size. 32-bit should be large enough for our
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// current needs.
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uint32 atom_size;
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};
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struct FullBox : Box {
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public:
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FullBox();
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virtual ~FullBox();
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uint8 version;
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uint32 flags;
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protected:
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virtual bool ReadWrite(BoxBuffer* buffer) OVERRIDE;
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};
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} // namespace mp4
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} // namespace media
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#endif // MEDIA_MP4_BOX_H_
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