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/*
* Copyright 2012 Google Inc. All Rights Reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef MEDIA_CRYPTO_SHELL_DECRYPTOR_FACTORY_H_
#define MEDIA_CRYPTO_SHELL_DECRYPTOR_FACTORY_H_
#include <map>
#include <string>
#include "media/base/decryptor.h"
#include "media/base/decryptor_client.h"
namespace media {
// Serves as a registry and factory for decryptors.
// This allows a complete decoupling so that the media stack does not need
// explicit knowledge of any particular decryptor or how it should be created.
class MEDIA_EXPORT ShellDecryptorFactory {
public:
// Creates a decryptor. Returns NULL on failure.
typedef base::Callback<media::Decryptor*(media::DecryptorClient*)> CreateCB;
static bool Supports(const std::string& key_system);
static Decryptor* Create(const std::string& key_system,
DecryptorClient* client);
static void RegisterDecryptor(const std::string& key_system,
const CreateCB& create_cb);
private:
typedef std::map<std::string, CreateCB> DecryptorRegistry;
static DecryptorRegistry registry_;
};
} // namespace media
#endif // MEDIA_CRYPTO_SHELL_DECRYPTOR_FACTORY_H_