1 /* 2 * Copyright 2022 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 OBOE_EXTENSIONS_ 18 #define OBOE_EXTENSIONS_ 19 20 #include <stdint.h> 21 22 #include "oboe/Definitions.h" 23 #include "oboe/AudioStream.h" 24 25 namespace oboe { 26 27 /** 28 * The definitions below are only for testing. 29 * They are not recommended for use in an application. 30 * They may change or be removed at any time. 31 */ 32 class OboeExtensions { 33 public: 34 35 /** 36 * @returns true if the device supports AAudio MMAP 37 */ 38 static bool isMMapSupported(); 39 40 /** 41 * @returns true if the AAudio MMAP data path can be selected 42 */ 43 static bool isMMapEnabled(); 44 45 /** 46 * Controls whether the AAudio MMAP data path can be selected when opening a stream. 47 * It has no effect after the stream has been opened. 48 * It only affects the application that calls it. Other apps are not affected. 49 * 50 * @param enabled 51 * @return 0 or a negative error code 52 */ 53 static int32_t setMMapEnabled(bool enabled); 54 55 /** 56 * @param oboeStream 57 * @return true if the AAudio MMAP data path is used on the stream 58 */ 59 static bool isMMapUsed(oboe::AudioStream *oboeStream); 60 }; 61 62 } // namespace oboe 63 64 #endif // OBOE_LATENCY_TUNER_ 65