1 /* 2 * Copyright (C) 2023 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17 #pragma once 18 19 #include <system/audio.h> 20 21 namespace android { 22 23 class VolumeInterface : public virtual RefBase { 24 public: 25 virtual void setMasterVolume(float value) = 0; 26 virtual void setMasterBalance(float balance) = 0; 27 virtual void setMasterMute(bool muted) = 0; 28 virtual void setStreamVolume(audio_stream_type_t stream, float value) = 0; 29 virtual void setStreamMute(audio_stream_type_t stream, bool muted) = 0; 30 // TODO(b/290699744) add "get" prefix for getter below. 31 virtual float streamVolume(audio_stream_type_t stream) const = 0; 32 }; 33 34 } // namespace android 35