64 lines
2.1 KiB
C++
64 lines
2.1 KiB
C++
// 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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//
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// EncryptorSource is responsible for encryption key acquisition.
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#ifndef MEDIA_BASE_ENCRYPTOR_SOURCE_H_
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#define MEDIA_BASE_ENCRYPTOR_SOURCE_H_
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#include <vector>
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#include "base/memory/scoped_ptr.h"
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#include "media/base/aes_encryptor.h"
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#include "media/base/status.h"
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namespace media {
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class EncryptorSource {
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public:
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EncryptorSource();
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virtual ~EncryptorSource();
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virtual Status Initialize() = 0;
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// Refreshes the encryptor. NOP except for key rotation encryptor source.
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// TODO(kqyang): Do we need to pass in duration or fragment number?
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virtual void RefreshEncryptor() {}
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// EncryptorSource retains the ownership of |encryptor_|.
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AesCtrEncryptor* encryptor() { return encryptor_.get(); }
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const std::vector<uint8>& key_id() const { return key_id_; }
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const std::vector<uint8>& key() const { return key_; }
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const std::vector<uint8>& pssh() const { return pssh_; }
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uint32 clear_milliseconds() const { return clear_milliseconds_; }
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const std::vector<uint8>& key_system_id() const { return key_system_id_; }
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protected:
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// EncryptorSource takes ownership of |encryptor|.
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void set_encryptor(scoped_ptr<AesCtrEncryptor> encryptor) {
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encryptor_ = encryptor.Pass();
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}
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void set_key_id(const std::vector<uint8>& key_id) { key_id_ = key_id; }
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void set_key(const std::vector<uint8>& key) { key_ = key; }
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void set_pssh(const std::vector<uint8>& pssh) { pssh_ = pssh; }
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void set_clear_milliseconds(uint32 clear_milliseconds) {
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clear_milliseconds_ = clear_milliseconds;
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}
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private:
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scoped_ptr<AesCtrEncryptor> encryptor_;
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std::vector<uint8> key_id_;
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std::vector<uint8> key_;
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std::vector<uint8> pssh_;
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// The first |clear_milliseconds_| of the result media should be in the clear
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// text, i.e. should not be encrypted.
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uint32 clear_milliseconds_;
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const std::vector<uint8> key_system_id_;
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DISALLOW_COPY_AND_ASSIGN(EncryptorSource);
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};
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}
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#endif // MEDIA_BASE_ENCRYPTOR_SOURCE_H_
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