1 /* 2 * Copyright 2018 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 <set> 20 #include <string> 21 #include <vector> 22 23 #include <base/callback_forward.h> 24 25 #include "avrcp_common.h" 26 #include "raw_address.h" 27 28 namespace bluetooth { 29 namespace avrcp { 30 31 struct SongInfo { 32 std::string media_id; // This gets converted to a UID in the native service 33 std::set<AttributeEntry> attributes; 34 }; 35 36 enum PlayState : uint8_t { 37 STOPPED = 0x00, 38 PLAYING, 39 PAUSED, 40 FWD_SEEK, 41 REV_SEEK, 42 ERROR = 0xFF, 43 }; 44 45 struct PlayStatus { 46 uint32_t position; 47 uint32_t duration; 48 PlayState state; 49 }; 50 51 struct MediaPlayerInfo { 52 uint16_t id; 53 std::string name; 54 bool browsing_supported; 55 }; 56 57 struct FolderInfo { 58 std::string media_id; 59 bool is_playable; 60 std::string name; 61 }; 62 63 // TODO (apanicke): Convert this to a union 64 struct ListItem { 65 enum : uint8_t { 66 FOLDER, 67 SONG, 68 } type; 69 70 FolderInfo folder; 71 SongInfo song; 72 }; 73 74 class MediaCallbacks { 75 public: 76 virtual void SendMediaUpdate(bool track_changed, bool play_state, 77 bool queue) = 0; 78 virtual void SendFolderUpdate(bool available_players, bool addressed_players, 79 bool uids_changed) = 0; 80 virtual void SendActiveDeviceChanged(const RawAddress& address) = 0; 81 virtual ~MediaCallbacks() = default; 82 }; 83 84 // The classes below are used by the JNI and are loaded dynamically with the 85 // Bluetooth library. All classes must be pure virtual otherwise a compiler 86 // error occurs when trying to link the function implementation. 87 88 // MediaInterface defines the class that the AVRCP Service uses in order 89 // communicate with the media layer. The media layer will define its own 90 // implementation of this object and register it with the service using 91 // Avrcp::ServiceInterface::Init(). At this point the AVRCP Service will 92 // call RegisterUpdateCallbacks() to provide an handle to use to send 93 // notifications about changes in the Media Interface. 94 // 95 // NOTES: The current implementation has the native service handle all the 96 // thread switching. It will call the interface functions on the btif/jni 97 // thread and the callback will post its results to the bta thread. 98 // In the future the interface the JNI registered with the 99 // service should post all its tasks to the JNI thread itself so that the native 100 // service isn't aware of the thread the interface functions need to be called 101 // on. It can then supply callbacks that post results to the correct thread 102 // allowing the threading model to be totally encapsulated and allow correct 103 // behavior in case the threading model changes on either side. 104 class MediaInterface { 105 public: 106 virtual void SendKeyEvent(uint8_t key, KeyState state) = 0; 107 108 using SongInfoCallback = base::Callback<void(SongInfo)>; 109 virtual void GetSongInfo(SongInfoCallback info_cb) = 0; 110 111 using PlayStatusCallback = base::Callback<void(PlayStatus)>; 112 virtual void GetPlayStatus(PlayStatusCallback status_cb) = 0; 113 114 // Contains the current queue and the media ID of the currently playing item 115 // in the queue 116 using NowPlayingCallback = 117 base::Callback<void(std::string, std::vector<SongInfo>)>; 118 virtual void GetNowPlayingList(NowPlayingCallback now_playing_cb) = 0; 119 120 // TODO (apanicke): Use a map with the ID as the key instead of vector 121 // in follow up cleanup patches. This allows simplification of the 122 // MediaPlayerInfo object 123 using MediaListCallback = 124 base::Callback<void(uint16_t curr_player, std::vector<MediaPlayerInfo>)>; 125 virtual void GetMediaPlayerList(MediaListCallback list_cb) = 0; 126 127 using FolderItemsCallback = base::Callback<void(std::vector<ListItem>)>; 128 virtual void GetFolderItems(uint16_t player_id, std::string media_id, 129 FolderItemsCallback folder_cb) = 0; 130 131 using SetBrowsedPlayerCallback = base::Callback<void( 132 bool success, std::string root_id, uint32_t num_items)>; 133 virtual void SetBrowsedPlayer(uint16_t player_id, 134 SetBrowsedPlayerCallback browse_cb) = 0; 135 136 virtual void PlayItem(uint16_t player_id, bool now_playing, 137 std::string media_id) = 0; 138 139 virtual void SetActiveDevice(const RawAddress& address) = 0; 140 141 virtual void RegisterUpdateCallback(MediaCallbacks* callback) = 0; 142 143 virtual void UnregisterUpdateCallback(MediaCallbacks* callback) = 0; 144 145 MediaInterface() = default; 146 virtual ~MediaInterface() = default; 147 }; 148 149 class VolumeInterface { 150 public: 151 // TODO (apanicke): Investigate the best value type for volume. Right now it 152 // is a value from 0-127 because thats what AVRCP uses. 153 using VolumeChangedCb = base::Callback<void(int8_t volume)>; 154 155 // Indicate that a device has been connected that does not support absolute 156 // volume. 157 virtual void DeviceConnected(const RawAddress& bdaddr) = 0; 158 159 // Indicate that a device has been connected that does support absolute 160 // volume. The callback will be immediately called with the current volume 161 // which will be sent to the device. 162 virtual void DeviceConnected(const RawAddress& bdaddr, 163 VolumeChangedCb cb) = 0; 164 165 // Indicate that a device has been disconnected from AVRCP. Will unregister 166 // any callbacks if absolute volume is supported. 167 virtual void DeviceDisconnected(const RawAddress& bdaddr) = 0; 168 169 virtual void SetVolume(int8_t volume) = 0; 170 171 virtual ~VolumeInterface() = default; 172 }; 173 174 class ServiceInterface { 175 public: 176 // mediaInterface can not be null. If volumeInterface is null then Absolute 177 // Volume is disabled. 178 virtual void Init(MediaInterface* mediaInterface, 179 VolumeInterface* volumeInterface) = 0; 180 virtual void RegisterBipServer(int psm) = 0; 181 virtual void UnregisterBipServer() = 0; 182 virtual bool ConnectDevice(const RawAddress& bdaddr) = 0; 183 virtual bool DisconnectDevice(const RawAddress& bdaddr) = 0; 184 virtual void SetBipClientStatus(const RawAddress& bdaddr, bool connected) = 0; 185 virtual bool Cleanup() = 0; 186 187 protected: 188 virtual ~ServiceInterface() = default; 189 }; 190 191 } // namespace avrcp 192 } // namespace bluetooth 193