57 lines
2.3 KiB
C++
57 lines
2.3 KiB
C++
/*
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* Copyright (C) 2019 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 HARDWARE_GOOGLE_CAMERA_HAL_SESSION_DATA_DEFS_H
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#define HARDWARE_GOOGLE_CAMERA_HAL_SESSION_DATA_DEFS_H
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#include <cstdint>
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namespace android {
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namespace google_camera_hal {
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// The session data API is a generic low-overhead mechanism for
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// internal data exchange across the (user-mode) driver stack. It
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// allows any component to set a key/value per a device session
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// and any other component to get that value in that session. It
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// does not care about the semantics of the key/value pair: it is
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// up to the usage parties (i.e. setters/getters) to agree on
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// the semantics, including the life cycle and validity of the
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// values. This is acceptable since this API is intended for
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// internal communication and therefore, it's expected that its
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// usage is part of a design where the assumptions / expectations
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// and roles of the parties are clearly defined.
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// Since there is no "type" associated with the keys, it is a
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// good practice to include hints about the type in the key name.
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//
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// The keys defined in here are visible across GCH and HWL. The
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// keys that are only visible within the HWL should be defined
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// in HWL but extend below key domain (i.e. respect the defined
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// range to avoid clashes.)
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enum SessionDataKey : uint64_t {
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kSessionDataKeyInvalidKey = 0,
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// Add HAL-visible keys here (visible to GCH and HWL).
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// A pointer to an int variable that indicates current
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// Eis frame delay number.
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// The pointer will be valid for the entire session.
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kSessionDataKeyEisFrameDelayIntPtr,
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kSessionDataKeyBeginHwlKeys = 0xFFFFFFFF
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};
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} // namespace google_camera_hal
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} // namespace android
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#endif // HARDWARE_GOOGLE_CAMERA_HAL_SESSION_DATA_DEFS_H
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