camera/device/3.7/ICameraDeviceSession.hal

/*
 * Copyright (C) 2021 The Android Open Source Project
 *
 * 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.
 */

package android.hardware.camera.device@3.7;

import android.hardware.camera.common@1.0::Status;
import @3.2::BufferCache;
import @3.5::StreamConfiguration;
import @3.6::ICameraDeviceSession;
import @3.6::HalStreamConfiguration;

/**
 * Camera device active session interface.
 *
 * Obtained via ICameraDevice::open(), this interface contains the methods to
 * configure and request captures from an active camera device.
 */
interface ICameraDeviceSession extends @3.6::ICameraDeviceSession {
    /**
     * configureStreams_3_7:
     *
     * Identical to @3.6::ICameraDeviceSession.configureStreams_3_6, except that:
     *
     * - The requestedConfiguration allows the camera framework to configure
     *   stream groups.
     * - For requested configurations of streams within the same group, the
     *   corresponding halConfiguration must have the same usage flags and
     *   maxBuffers.
     * - Within a CaptureRequest, the application is guaranteed not to request
     *   more than one streams within the same stream group. When one of the
     *   stream within a stream group is requested, the camera HAL can either
     *   produce output on that stream, or any other stream within the same
     *   stream group.
     * - The requestedConfiguration allows the camera framework to indicate that
     *   input images of different sizes may be submitted within capture
     *   requests.
     *
     * @return status Status code for the operation, one of:
     *     OK:
     *         On successful stream configuration.
     *     INTERNAL_ERROR:
     *         If there has been a fatal error and the device is no longer
     *         operational. Only close() can be called successfully by the
     *         framework after this error is returned.
     *     ILLEGAL_ARGUMENT:
     *         If the requested stream configuration is invalid. Some examples
     *         of invalid stream configurations include:
     *           - Including more than 1 INPUT stream
     *           - Not including any OUTPUT streams
     *           - Including streams with unsupported formats, or an unsupported
     *             size for that format.
     *           - Including too many output streams of a certain format.
     *           - Unsupported rotation configuration
     *           - Stream sizes/formats don't satisfy the
     *             StreamConfigurationMode requirements
     *             for non-NORMAL mode, or the requested operation_mode is not
     *             supported by the HAL.
     *           - Unsupported usage flag
     *           - Unsupported stream groupIds, or unsupported multi-resolution
     *             input stream.
     *         The camera service cannot filter out all possible illegal stream
     *         configurations, since some devices may support more simultaneous
     *         streams or larger stream resolutions than the minimum required
     *         for a given camera device hardware level. The HAL must return an
     *         ILLEGAL_ARGUMENT for any unsupported stream set, and then be
     *         ready to accept a future valid stream configuration in a later
     *         configureStreams call.
     * @return halConfiguration The stream parameters desired by the HAL for
     *     each stream, including maximum buffers, the usage flags, and the
     *     override format.
     */
    configureStreams_3_7(StreamConfiguration requestedConfiguration)
        generates (Status status, @3.6::HalStreamConfiguration halConfiguration);

    /**
     * processCaptureRequest_3_7:
     *
     * Identical to @3.4::ICameraDeviceSession.processCaptureRequest, except that:
     *
     * - The capture request can include width and height of the input buffer for
     *   a reprocessing request.
     *
     * @return status Status code for the operation, one of:
     *     OK:
     *         On a successful start to processing the capture request
     *     ILLEGAL_ARGUMENT:
     *         If the input is malformed (the settings are empty when not
     *         allowed, the physical camera settings are invalid, there are 0
     *         output buffers, etc) and capture processing
     *         cannot start. Failures during request processing must be
     *         handled by calling ICameraDeviceCallback::notify(). In case of
     *         this error, the framework retains responsibility for the
     *         stream buffers' fences and the buffer handles; the HAL must not
     *         close the fences or return these buffers with
     *         ICameraDeviceCallback::processCaptureResult().
     *         In case of multi-resolution input image, this error must be returned
     *         if the caller passes in a CaptureRequest with an invalid
     *         [inputWith, inputHeight].
     *     INTERNAL_ERROR:
     *         If the camera device has encountered a serious error. After this
     *         error is returned, only the close() method can be successfully
     *         called by the framework.
     * @return numRequestProcessed Number of requests successfully processed by
     *     camera HAL. When status is OK, this must be equal to the size of
     *     requests. When the call fails, this number is the number of requests
     *     that HAL processed successfully before HAL runs into an error.
     *
     */
    processCaptureRequest_3_7(vec<CaptureRequest> requests, vec<BufferCache> cachesToRemove)
            generates (Status status, uint32_t numRequestProcessed);
};