platform_hardware_interfaces/drm/1.2/IDrmFactory.hal

/*
 * Copyright (C) 2018 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.drm@1.2;

import @1.1::IDrmFactory;
import @1.1::IDrmPlugin;
import @1.1::SecurityLevel;

/**
 * IDrmFactory is the main entry point for interacting with a vendor's
 * drm HAL to create drm plugin instances. A drm plugin instance
 * creates drm sessions which are used to obtain keys for a crypto
 * session so it can decrypt protected video content.
 *
 * The 1.2 factory must always create 1.2 IDrmPlugin interfaces, which are
 * returned via the 1.0 createPlugin method.
 *
 * To use 1.2 features the caller must cast the returned interface to a
 * 1.2 HAL, using V1_2::IDrmPlugin::castFrom().
 *
 * The IDrmFactory hal is required because all top-level interfaces
 * have to be updated in a minor uprev.
 */

interface IDrmFactory extends @1.1::IDrmFactory {
    /**
     * Determine if a specific security level is supported by the device.
     * This method only differs from @1.0 isCryptoSchemeSupported
     * by the addition of a security level.
     *
     * @param uuid identifies the crypto scheme in question
     * @param mimeType identifies the mime type in question
     * @param securityLevel specifies the security level required
     * @return isSupported must be true only if the scheme is supported
     */
    isCryptoSchemeSupported_1_2(uint8_t[16] uuid, string mimeType,
            @1.1::SecurityLevel securityLevel) generates(bool isSupported);
};