1 /* 2 * Copyright (C) 2016 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 #ifndef ANDROID_AUDIO_MMAP_STREAM_CALLBACK_H 18 #define ANDROID_AUDIO_MMAP_STREAM_CALLBACK_H 19 20 #include <media/AudioContainers.h> 21 #include <system/audio.h> 22 #include <utils/Errors.h> 23 #include <utils/RefBase.h> 24 25 namespace android { 26 27 28 class MmapStreamCallback : public virtual RefBase { 29 public: 30 31 /** 32 * The mmap stream should be torn down because conditions that permitted its creation with 33 * the requested parameters have changed and do not allow it to operate with the requested 34 * constraints any more. 35 * \param[in] handle handle for the client stream to tear down. 36 */ 37 virtual void onTearDown(audio_port_handle_t handle) = 0; 38 39 /** 40 * The volume to be applied to the use case specified when opening the stream has changed 41 * \param[in] volume the new target volume 42 */ 43 virtual void onVolumeChanged(float volume) = 0; 44 45 /** 46 * The devices the stream is routed to/from has changed 47 * \param[in] deviceIds a set of the device IDs of the new devices. 48 */ 49 virtual void onRoutingChanged(const DeviceIdVector& deviceIds) = 0; 50 51 protected: MmapStreamCallback()52 MmapStreamCallback() {} ~MmapStreamCallback()53 virtual ~MmapStreamCallback() {} 54 }; 55 56 57 } // namespace android 58 59 #endif // ANDROID_AUDIO_MMAP_STREAM_CALLBACK_H 60