1 /*
2  * Copyright (c) 2023 Huawei Device Co., Ltd.
3  * Licensed under the Apache License, Version 2.0 (the "License");
4  * you may not use this file except in compliance with the License.
5  * You may obtain a copy of the License at
6  *
7  *     http://www.apache.org/licenses/LICENSE-2.0
8  *
9  * Unless required by applicable law or agreed to in writing, software
10  * distributed under the License is distributed on an "AS IS" BASIS,
11  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12  * See the License for the specific language governing permissions and
13  * limitations under the License.
14  */
15 
16 #ifndef OHOS_I_AV_ENGINE_PROVIDER_CALLBACK_H
17 #define OHOS_I_AV_ENGINE_PROVIDER_CALLBACK_H
18 
19 #include "av_trans_errno.h"
20 #include "av_trans_types.h"
21 
22 namespace OHOS {
23 namespace DistributedHardware {
24 /**
25  * @brief AV engine provider callback interface.
26  *
27  * AV engine provider callback is used to receive the engine provider state change events.
28  *
29  * @since 1.0
30  * @version 1.0
31  */
32 class IAVEngineProviderCallback {
33 public:
34     /**
35      * @brief Destructor.
36      * @return No return value.
37      */
38     virtual ~IAVEngineProviderCallback() = default;
39 
40     /**
41      * @brief Report the engine provider state change events to the distributed service.
42      * @param event  event content.
43      * @return Returns DH_AVT_SUCCESS(0) if successful, otherwise returns other error code.
44      */
45     virtual int32_t OnProviderEvent(const AVTransEvent &event) = 0;
46 };
47 } // DistributedHardware
48 } // OHOS
49 #endif // OHOS_I_AV_ENGINE_PROVIDER_CALLBACK_H