1 /* 2 * Copyright (C) 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 package android.hardware.bluetooth.a2dp@1.0; 18 19 /** 20 * HAL interface for Bluetooth A2DP Offload functionality where 21 * the encoding of the A2DP data packets is offloaded to platform 22 * specific encoders. The A2DP control path is maintained in the 23 * Bluetooth stack. 24 * 25 * This interface is from HAL server to HAL client. 26 * 27 * The HAL server must call into the IBluetoothAudioHost to initiate 28 * the start, suspend and stop of the streaming operation. These 29 * calls return immediately and the results, if any, are send over 30 * the IBluetoothAudioOffload interface. 31 */ 32 33 interface IBluetoothAudioHost { 34 /** 35 * Invoked when the start stream is requested from HAL server 36 * to HAL client. This indicates that the HAL server 37 * has initialized the platform for streaming use case, and the 38 * HAL client can proceed with the streaming procedure. The 39 * result of the operation must be provided by the HAL 40 * client using the IBluetoothAudioOffload interface. 41 */ 42 oneway startStream(); 43 44 /** 45 * Invoked when the suspend stream is requested from HAL server 46 * to HAL client. This indicates that the HAL server 47 * wants to suspend the streaming procedure. The result of the 48 * operation must be provided by the HAL client using the 49 * IBluetoothAudioOffload interface. 50 */ 51 oneway suspendStream(); 52 53 /** 54 * Invoked when the stop stream is requested from HAL server 55 * to HAL client. This indicates that the HAL server wants to 56 * stop and reset the streaming procedure. There is no result 57 * provided by the HAL client for this call. 58 */ 59 oneway stopStream(); 60 61 }; 62
