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155 lines
7.2 KiB
155 lines
7.2 KiB
/*
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* Copyright (C) 2018 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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package android.hardware.camera.device@3.5;
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import android.hardware.camera.common@1.0::Status;
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import @3.2::CameraMetadata;
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import @3.4::ICameraDeviceSession;
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import @3.4::HalStreamConfiguration;
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/**
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* Camera device active session interface.
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*
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* Obtained via ICameraDevice::open(), this interface contains the methods to
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* configure and request captures from an active camera device.
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*/
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interface ICameraDeviceSession extends @3.4::ICameraDeviceSession {
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/**
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* configureStreams_3_5:
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*
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* Identical to @3.4::ICameraDeviceSession.configureStreams, except that:
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*
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* - a streamConfigCounter counter is provided to check for race condition
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* between configureStreams_3_5 and signalStreamFlush call.
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* - In case the HAL overrides dataspace or format for
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* IMPLEMENTATION_DEFINED pixel format, camera framework must use original
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* dataspace and format in subsequent configureStreams_3_5 calls for the same
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* stream. HAL is allowed to change the overriding behavior of format or
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* dataspace for reconfiguration of the same stream depending on the stream
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* combination.
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*
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* @return status Status code for the operation, one of:
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* OK:
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* On successful stream configuration.
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* INTERNAL_ERROR:
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* If there has been a fatal error and the device is no longer
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* operational. Only close() can be called successfully by the
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* framework after this error is returned.
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* ILLEGAL_ARGUMENT:
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* If the requested stream configuration is invalid. Some examples
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* of invalid stream configurations include:
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* - Including more than 1 INPUT stream
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* - Not including any OUTPUT streams
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* - Including streams with unsupported formats, or an unsupported
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* size for that format.
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* - Including too many output streams of a certain format.
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* - Unsupported rotation configuration
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* - Stream sizes/formats don't satisfy the
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* StreamConfigurationMode requirements
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* for non-NORMAL mode, or the requested operation_mode is not
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* supported by the HAL.
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* - Unsupported usage flag
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* The camera service cannot filter out all possible illegal stream
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* configurations, since some devices may support more simultaneous
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* streams or larger stream resolutions than the minimum required
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* for a given camera device hardware level. The HAL must return an
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* ILLEGAL_ARGUMENT for any unsupported stream set, and then be
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* ready to accept a future valid stream configuration in a later
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* configureStreams call.
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* @return halConfiguration The stream parameters desired by the HAL for
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* each stream, including maximum buffers, the usage flags, and the
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* override format.
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*/
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configureStreams_3_5(@3.5::StreamConfiguration requestedConfiguration)
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generates (Status status,
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@3.4::HalStreamConfiguration halConfiguration);
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/**
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* signalStreamFlush:
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*
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* Signaling HAL camera service is about to perform configureStreams_3_5 and
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* HAL must return all buffers of designated streams. HAL must finish
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* inflight requests normally and return all buffers that belongs to the
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* designated streams through processCaptureResult or returnStreamBuffer
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* API in a timely manner, or camera service will run into a fatal error.
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*
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* Note that this call serves as an optional hint and camera service may
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* skip sending this call if all buffers are already returned.
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*
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* @param streamIds The ID of streams camera service need all of its
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* buffers returned.
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*
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* @param streamConfigCounter Note that due to concurrency nature, it is
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* possible the signalStreamFlush call arrives later than the
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* corresponding configureStreams_3_5 call, HAL must check
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* streamConfigCounter for such race condition. If the counter is less
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* than the counter in the last configureStreams_3_5 call HAL last
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* received, the call is stale and HAL should just return this call.
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*/
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oneway signalStreamFlush(
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vec<int32_t> streamIds,
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uint32_t streamConfigCounter
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);
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/**
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* isReconfigurationRequired:
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*
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* Check whether complete stream reconfiguration is required for possible new session
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* parameter values.
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*
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* This method must be called by the camera framework in case the client changes
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* the value of any advertised session parameters. Depending on the specific values
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* the HAL can decide whether a complete stream reconfiguration is required. In case
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* the HAL returns false, the camera framework must skip the internal reconfiguration.
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* In case Hal returns true, the framework must reconfigure the streams and pass the
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* new session parameter values accordingly.
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* This call may be done by the framework some time before the request with new parameters
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* is submitted to the HAL, and the request may be cancelled before it ever gets submitted.
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* Therefore, the HAL must not use this query as an indication to change its behavior in any
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* way.
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* ------------------------------------------------------------------------
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*
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* Preconditions:
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*
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* The framework can call this method at any time after active
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* session configuration. There must be no impact on the performance of
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* pending camera requests in any way. In particular there must not be
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* any glitches or delays during normal camera streaming.
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*
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* Performance requirements:
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* HW and SW camera settings must not be changed and there must not be
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* a user-visible impact on camera performance.
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*
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* @param oldSessionParams Before session parameters, usually the current session parameters.
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* @param newSessionParams The new session parameters which may be set by client.
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*
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* @return Status Status code for the operation, one of:
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* OK:
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* On successful reconfiguration required query.
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* METHOD_NOT_SUPPORTED:
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* The camera device does not support the reconfiguration query.
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* INTERNAL_ERROR:
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* The reconfiguration query cannot complete due to internal
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* error.
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* @return true in case the stream reconfiguration is required, false otherwise.
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*/
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isReconfigurationRequired(CameraMetadata oldSessionParams, CameraMetadata newSessionParams)
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generates(Status status, bool reconfigurationNeeded);
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};
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