1 /* 2 * Copyright (c) 2023-2025 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 namespace OHOS { 20 namespace AudioStandard { 21 enum Operation : int32_t { 22 START_STREAM = 0, 23 PAUSE_STREAM, 24 STOP_STREAM, 25 RELEASE_STREAM, 26 FLUSH_STREAM, 27 DRAIN_STREAM, 28 UPDATE_STREAM, // when server notify client index update 29 BUFFER_UNDERRUN, 30 BUFFER_OVERFLOW, 31 SET_OFFLOAD_ENABLE, 32 UNDERFLOW_COUNT_ADD, // notify client underflow count increment 33 DATA_LINK_CONNECTING, // a2dp offload connecting 34 DATA_LINK_CONNECTED, 35 RESTORE_SESSION, 36 MAX_OPERATION_CODE // in plan add underrun overflow 37 }; 38 class IStreamListener { 39 public: 40 virtual ~IStreamListener() = default; 41 42 virtual int32_t OnOperationHandled(Operation operation, int64_t result) = 0; 43 }; 44 } // namespace AudioStandard 45 } // namespace OHOS 46 #endif // I_STREAM_LISTENER_H 47