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/*
* Copyright (C) 2020 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.audio@7.0;
import android.hardware.audio.common@7.0;
import IDevice;
import IPrimaryDevice;
/** This factory allows a HAL implementation to be split in multiple independent
* devices (called module in the pre-treble API).
* Note that this division is arbitrary and implementation are free
* to only have a Primary.
* The framework will query the devices according to audio_policy_configuration.xml
*
* Each device name is arbitrary, provided by the vendor's audio_policy_configuration.xml
* and only used to identify a device in this factory.
* The framework must not interpret the name, treating it as a vendor opaque data
* with the following exception:
* - the "r_submix" device that must be present to support policyMixes (Eg: Android projected).
* Note that this Device is included by default in a build derived from AOSP.
*
* Note that on AOSP Oreo (including MR1) the "a2dp" module is not using this API
* but is loaded directly from the system partition using the legacy API
* due to limitations with the Bluetooth framework.
*/
interface IDevicesFactory {
/**
* Opens an audio device. To close the device, it is necessary to release
* references to the returned device object.
*
* @param device device name.
* @return retval operation completion status. Returns INVALID_ARGUMENTS
* if there is no corresponding hardware module found,
* NOT_INITIALIZED if an error occurred while opening the hardware
* module.
* @return result the interface for the created device.
*/
openDevice(string device) generates (Result retval, IDevice result);
/**
* Opens the Primary audio device that must be present.
* This function is not optional and must return successfully the primary device.
*
* This device must have the name "primary".
*
* The telephony stack uses this device to control the audio during a voice call.
*
* @return retval operation completion status. Must be SUCCESS.
* For debugging, return INVALID_ARGUMENTS if there is no corresponding
* hardware module found, NOT_INITIALIZED if an error occurred
* while opening the hardware module.
* @return result the interface for the created device.
*/
openPrimaryDevice() generates (Result retval, IPrimaryDevice result);
};
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