1 /* 2 * Copyright 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 OBOE_AAUDIO_LOADER_H_ 18 #define OBOE_AAUDIO_LOADER_H_ 19 20 #include <unistd.h> 21 #include "oboe/Definitions.h" 22 23 // If the NDK is before O then define this in your build 24 // so that AAudio.h will not be included. 25 #ifdef OBOE_NO_INCLUDE_AAUDIO 26 27 // Define missing types from AAudio.h 28 typedef int32_t aaudio_stream_state_t; 29 typedef int32_t aaudio_direction_t; 30 typedef int32_t aaudio_format_t; 31 typedef int32_t aaudio_data_callback_result_t; 32 typedef int32_t aaudio_result_t; 33 typedef int32_t aaudio_sharing_mode_t; 34 typedef int32_t aaudio_performance_mode_t; 35 36 typedef struct AAudioStreamStruct AAudioStream; 37 typedef struct AAudioStreamBuilderStruct AAudioStreamBuilder; 38 39 typedef aaudio_data_callback_result_t (*AAudioStream_dataCallback)( 40 AAudioStream *stream, 41 void *userData, 42 void *audioData, 43 int32_t numFrames); 44 45 typedef void (*AAudioStream_errorCallback)( 46 AAudioStream *stream, 47 void *userData, 48 aaudio_result_t error); 49 50 // These were defined in P 51 typedef int32_t aaudio_usage_t; 52 typedef int32_t aaudio_content_type_t; 53 typedef int32_t aaudio_input_preset_t; 54 typedef int32_t aaudio_session_id_t; 55 #else 56 #include <aaudio/AAudio.h> 57 #include <android/ndk-version.h> 58 #endif 59 60 #ifndef __NDK_MAJOR__ 61 #define __NDK_MAJOR__ 0 62 #endif 63 64 namespace oboe { 65 66 67 /** 68 * The AAudio API was not available in early versions of Android. 69 * To avoid linker errors, we dynamically link with the functions by name using dlsym(). 70 * On older versions this linkage will safely fail. 71 */ 72 class AAudioLoader { 73 public: 74 // Use signatures for common functions. 75 // Key to letter abbreviations. 76 // S = Stream 77 // B = Builder 78 // I = int32_t 79 // L = int64_t 80 // T = sTate 81 // K = clocKid_t 82 // P = Pointer to following data type 83 // C = Const prefix 84 // H = cHar 85 typedef int32_t (*signature_I_PPB)(AAudioStreamBuilder **builder); 86 87 typedef const char * (*signature_CPH_I)(int32_t); 88 89 typedef int32_t (*signature_I_PBPPS)(AAudioStreamBuilder *, 90 AAudioStream **stream); // AAudioStreamBuilder_open() 91 92 typedef int32_t (*signature_I_PB)(AAudioStreamBuilder *); // AAudioStreamBuilder_delete() 93 // AAudioStreamBuilder_setSampleRate() 94 typedef void (*signature_V_PBI)(AAudioStreamBuilder *, int32_t); 95 96 typedef int32_t (*signature_I_PS)(AAudioStream *); // AAudioStream_getSampleRate() 97 typedef int64_t (*signature_L_PS)(AAudioStream *); // AAudioStream_getFramesRead() 98 // AAudioStream_setBufferSizeInFrames() 99 typedef int32_t (*signature_I_PSI)(AAudioStream *, int32_t); 100 101 typedef void (*signature_V_PBPDPV)(AAudioStreamBuilder *, 102 AAudioStream_dataCallback, 103 void *); 104 105 typedef void (*signature_V_PBPEPV)(AAudioStreamBuilder *, 106 AAudioStream_errorCallback, 107 void *); 108 109 typedef aaudio_format_t (*signature_F_PS)(AAudioStream *stream); 110 111 typedef int32_t (*signature_I_PSPVIL)(AAudioStream *, void *, int32_t, int64_t); 112 typedef int32_t (*signature_I_PSCPVIL)(AAudioStream *, const void *, int32_t, int64_t); 113 114 typedef int32_t (*signature_I_PSTPTL)(AAudioStream *, 115 aaudio_stream_state_t, 116 aaudio_stream_state_t *, 117 int64_t); 118 119 typedef int32_t (*signature_I_PSKPLPL)(AAudioStream *, clockid_t, int64_t *, int64_t *); 120 121 typedef bool (*signature_B_PS)(AAudioStream *); 122 123 static AAudioLoader* getInstance(); // singleton 124 125 /** 126 * Open the AAudio shared library and load the function pointers. 127 * This can be called multiple times. 128 * It should only be called from one thread. 129 * 130 * The destructor will clean up after the open. 131 * 132 * @return 0 if successful or negative error. 133 */ 134 int open(); 135 136 // Function pointers into the AAudio shared library. 137 signature_I_PPB createStreamBuilder = nullptr; 138 139 signature_I_PBPPS builder_openStream = nullptr; 140 141 signature_V_PBI builder_setBufferCapacityInFrames = nullptr; 142 signature_V_PBI builder_setChannelCount = nullptr; 143 signature_V_PBI builder_setDeviceId = nullptr; 144 signature_V_PBI builder_setDirection = nullptr; 145 signature_V_PBI builder_setFormat = nullptr; 146 signature_V_PBI builder_setFramesPerDataCallback = nullptr; 147 signature_V_PBI builder_setPerformanceMode = nullptr; 148 signature_V_PBI builder_setSampleRate = nullptr; 149 signature_V_PBI builder_setSharingMode = nullptr; 150 151 signature_V_PBI builder_setUsage = nullptr; 152 signature_V_PBI builder_setContentType = nullptr; 153 signature_V_PBI builder_setInputPreset = nullptr; 154 signature_V_PBI builder_setSessionId = nullptr; 155 156 signature_V_PBPDPV builder_setDataCallback = nullptr; 157 signature_V_PBPEPV builder_setErrorCallback = nullptr; 158 159 signature_I_PB builder_delete = nullptr; 160 161 signature_F_PS stream_getFormat = nullptr; 162 163 signature_I_PSPVIL stream_read = nullptr; 164 signature_I_PSCPVIL stream_write = nullptr; 165 166 signature_I_PSTPTL stream_waitForStateChange = nullptr; 167 168 signature_I_PSKPLPL stream_getTimestamp = nullptr; 169 170 signature_B_PS stream_isMMapUsed = nullptr; 171 172 signature_I_PS stream_close = nullptr; 173 174 signature_I_PS stream_getChannelCount = nullptr; 175 signature_I_PS stream_getDeviceId = nullptr; 176 177 signature_I_PS stream_getBufferSize = nullptr; 178 signature_I_PS stream_getBufferCapacity = nullptr; 179 signature_I_PS stream_getFramesPerBurst = nullptr; 180 signature_I_PS stream_getState = nullptr; 181 signature_I_PS stream_getPerformanceMode = nullptr; 182 signature_I_PS stream_getSampleRate = nullptr; 183 signature_I_PS stream_getSharingMode = nullptr; 184 signature_I_PS stream_getXRunCount = nullptr; 185 186 signature_I_PSI stream_setBufferSize = nullptr; 187 signature_I_PS stream_requestStart = nullptr; 188 signature_I_PS stream_requestPause = nullptr; 189 signature_I_PS stream_requestFlush = nullptr; 190 signature_I_PS stream_requestStop = nullptr; 191 192 signature_L_PS stream_getFramesRead = nullptr; 193 signature_L_PS stream_getFramesWritten = nullptr; 194 195 signature_CPH_I convertResultToText = nullptr; 196 197 signature_I_PS stream_getUsage = nullptr; 198 signature_I_PS stream_getContentType = nullptr; 199 signature_I_PS stream_getInputPreset = nullptr; 200 signature_I_PS stream_getSessionId = nullptr; 201 202 private: AAudioLoader()203 AAudioLoader() {} 204 ~AAudioLoader(); 205 206 // Load function pointers for specific signatures. 207 signature_I_PPB load_I_PPB(const char *name); 208 signature_CPH_I load_CPH_I(const char *name); 209 signature_V_PBI load_V_PBI(const char *name); 210 signature_V_PBPDPV load_V_PBPDPV(const char *name); 211 signature_V_PBPEPV load_V_PBPEPV(const char *name); 212 signature_I_PB load_I_PB(const char *name); 213 signature_I_PBPPS load_I_PBPPS(const char *name); 214 signature_I_PS load_I_PS(const char *name); 215 signature_L_PS load_L_PS(const char *name); 216 signature_F_PS load_F_PS(const char *name); 217 signature_B_PS load_B_PS(const char *name); 218 signature_I_PSI load_I_PSI(const char *name); 219 signature_I_PSPVIL load_I_PSPVIL(const char *name); 220 signature_I_PSCPVIL load_I_PSCPVIL(const char *name); 221 signature_I_PSTPTL load_I_PSTPTL(const char *name); 222 signature_I_PSKPLPL load_I_PSKPLPL(const char *name); 223 224 void *mLibHandle = nullptr; 225 }; 226 227 } // namespace oboe 228 229 #endif //OBOE_AAUDIO_LOADER_H_ 230