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57 lines
1.6 KiB
57 lines
1.6 KiB
/*
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* Copyright (C) 2017 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef KEY_FETCHER_H_
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#define KEY_FETCHER_H_
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#include <vector>
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#include <media/stagefright/foundation/ABuffer.h>
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#include <utils/Errors.h>
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using namespace std;
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namespace android {
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namespace clearkeycas {
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// Interface for classes which extract the content key from an Ecm.
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class KeyFetcher {
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public:
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struct KeyInfo {
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sp<ABuffer> key_bytes;
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int key_id;
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};
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KeyFetcher() {}
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virtual ~KeyFetcher() {}
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// Initializes resources set in subclass-specific calls. This must be called
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// before threads are started.
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virtual status_t Init() = 0;
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// Obtains content key(s) based on contents of |ecm|. |asset_id| is the
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// internal id of the asset, |keys| is a vector containing instances of a
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// class containing a content key and an id. |asset_id| and |keys| are
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// owned by the caller and must be non-null.
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virtual status_t ObtainKey(const sp<ABuffer>& ecm,
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uint64_t* asset_id, vector<KeyInfo>* keys) = 0;
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};
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} // namespace clearkeycas
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} // namespace android
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#endif // KEY_FETCHER_H_
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