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 I_STREAM_LISTENER_H
17 #define I_STREAM_LISTENER_H
18 
19 #include "audio_info.h"
20 
21 namespace OHOS {
22 namespace AudioStandard {
23 enum Operation : int32_t {
24     START_STREAM = 0,
25     PAUSE_STREAM,
26     STOP_STREAM,
27     RELEASE_STREAM,
28     FLUSH_STREAM,
29     DRAIN_STREAM,
30     UPDATE_STREAM, // when server notify client index update
31     BUFFER_UNDERRUN,
32     BUFFER_OVERFLOW,
33     SET_OFFLOAD_ENABLE,
34     UNDERFLOW_COUNT_ADD, // notify client underflow count increment
35     DATA_LINK_CONNECTING,  // a2dp offload connecting
36     DATA_LINK_CONNECTED,
37     MAX_OPERATION_CODE // in plan add underrun overflow
38 };
39 class IStreamListener {
40 public:
41     virtual ~IStreamListener() = default;
42 
43     virtual int32_t OnOperationHandled(Operation operation, int64_t result) = 0;
44 };
45 } // namespace AudioStandard
46 } // namespace OHOS
47 #endif // I_STREAM_LISTENER_H
48