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// Copyright (c) 2011 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_BITSTREAM_BUFFER_H_
#define MEDIA_BASE_BITSTREAM_BUFFER_H_
#include "base/basictypes.h"
#include "base/memory/shared_memory.h"
#include "base/time/time.h"
#include "media/base/decrypt_config.h"
#include "media/base/media_export.h"
#include "media/base/timestamp_constants.h"
namespace media {
// Class for passing bitstream buffers around. Does not take ownership of the
// data. This is the media-namespace equivalent of PP_VideoBitstreamBuffer_Dev.
class MEDIA_EXPORT BitstreamBuffer {
public:
BitstreamBuffer(int32 id, base::SharedMemoryHandle handle, size_t size);
BitstreamBuffer(int32 id,
base::SharedMemoryHandle handle,
size_t size,
base::TimeDelta presentation_timestamp);
~BitstreamBuffer();
void SetDecryptConfig(const DecryptConfig& decrypt_config);
int32 id() const { return id_; }
base::SharedMemoryHandle handle() const { return handle_; }
size_t size() const { return size_; }
// The timestamp is only valid if it's not equal to |media::kNoTimestamp()|.
base::TimeDelta presentation_timestamp() const {
return presentation_timestamp_;
}
// The following methods come from DecryptConfig.
const std::string& key_id() const { return key_id_; }
const std::string& iv() const { return iv_; }
const std::vector<SubsampleEntry>& subsamples() const { return subsamples_; }
private:
int32 id_;
base::SharedMemoryHandle handle_;
size_t size_;
// This is only set when necessary. For example, AndroidVideoDecodeAccelerator
// needs the timestamp because the underlying decoder may require it to
// determine the output order.
base::TimeDelta presentation_timestamp_;
// The following fields come from DecryptConfig.
// TODO(timav): Try to DISALLOW_COPY_AND_ASSIGN and include these params as
// scoped_ptr<DecryptConfig> or explain why copy & assign is needed.
std::string key_id_; // key ID.
std::string iv_; // initialization vector
std::vector<SubsampleEntry> subsamples_; // clear/cypher sizes
// Allow compiler-generated copy & assign constructors.
};
} // namespace media
#endif // MEDIA_BASE_BITSTREAM_BUFFER_H_
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