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 56 // There are a few definitions used by Oboe. 57 #define AAUDIO_OK static_cast<aaudio_result_t>(Result::OK) 58 #define AAUDIO_ERROR_TIMEOUT static_cast<aaudio_result_t>(Result::ErrorTimeout) 59 #define AAUDIO_STREAM_STATE_STARTING static_cast<aaudio_stream_state_t>(StreamState::Starting) 60 #define AAUDIO_STREAM_STATE_STARTED static_cast<aaudio_stream_state_t>(StreamState::Started) 61 #else 62 #include <aaudio/AAudio.h> 63 #endif 64 65 #ifndef __NDK_MAJOR__ 66 #define __NDK_MAJOR__ 0 67 #endif 68 69 #if __NDK_MAJOR__ < 24 70 // Defined in SC_V2 71 typedef uint32_t aaudio_channel_mask_t; 72 #endif 73 74 #ifndef __ANDROID_API_S__ 75 #define __ANDROID_API_S__ 31 76 #endif 77 78 #ifndef __ANDROID_API_S_V2__ 79 #define __ANDROID_API_S_V2__ 32 80 #endif 81 82 namespace oboe { 83 84 /** 85 * The AAudio API was not available in early versions of Android. 86 * To avoid linker errors, we dynamically link with the functions by name using dlsym(). 87 * On older versions this linkage will safely fail. 88 */ 89 class AAudioLoader { 90 public: 91 // Use signatures for common functions. 92 // Key to letter abbreviations. 93 // S = Stream 94 // B = Builder 95 // I = int32_t 96 // L = int64_t 97 // T = sTate 98 // K = clocKid_t 99 // P = Pointer to following data type 100 // C = Const prefix 101 // H = cHar 102 // U = uint32_t 103 typedef int32_t (*signature_I_PPB)(AAudioStreamBuilder **builder); 104 105 typedef const char * (*signature_CPH_I)(int32_t); 106 107 typedef int32_t (*signature_I_PBPPS)(AAudioStreamBuilder *, 108 AAudioStream **stream); // AAudioStreamBuilder_open() 109 110 typedef int32_t (*signature_I_PB)(AAudioStreamBuilder *); // AAudioStreamBuilder_delete() 111 // AAudioStreamBuilder_setSampleRate() 112 typedef void (*signature_V_PBI)(AAudioStreamBuilder *, int32_t); 113 114 // AAudioStreamBuilder_setChannelMask() 115 typedef void (*signature_V_PBU)(AAudioStreamBuilder *, uint32_t); 116 117 typedef void (*signature_V_PBCPH)(AAudioStreamBuilder *, const char *); 118 119 typedef int32_t (*signature_I_PS)(AAudioStream *); // AAudioStream_getSampleRate() 120 typedef int64_t (*signature_L_PS)(AAudioStream *); // AAudioStream_getFramesRead() 121 // AAudioStream_setBufferSizeInFrames() 122 typedef int32_t (*signature_I_PSI)(AAudioStream *, int32_t); 123 124 typedef void (*signature_V_PBPDPV)(AAudioStreamBuilder *, 125 AAudioStream_dataCallback, 126 void *); 127 128 typedef void (*signature_V_PBPEPV)(AAudioStreamBuilder *, 129 AAudioStream_errorCallback, 130 void *); 131 132 typedef aaudio_format_t (*signature_F_PS)(AAudioStream *stream); 133 134 typedef int32_t (*signature_I_PSPVIL)(AAudioStream *, void *, int32_t, int64_t); 135 typedef int32_t (*signature_I_PSCPVIL)(AAudioStream *, const void *, int32_t, int64_t); 136 137 typedef int32_t (*signature_I_PSTPTL)(AAudioStream *, 138 aaudio_stream_state_t, 139 aaudio_stream_state_t *, 140 int64_t); 141 142 typedef int32_t (*signature_I_PSKPLPL)(AAudioStream *, clockid_t, int64_t *, int64_t *); 143 144 typedef bool (*signature_B_PS)(AAudioStream *); 145 146 typedef uint32_t (*signature_U_PS)(AAudioStream *); 147 148 static AAudioLoader* getInstance(); // singleton 149 150 /** 151 * Open the AAudio shared library and load the function pointers. 152 * This can be called multiple times. 153 * It should only be called from one thread. 154 * 155 * The destructor will clean up after the open. 156 * 157 * @return 0 if successful or negative error. 158 */ 159 int open(); 160 getLibHandle()161 void *getLibHandle() const { return mLibHandle; } 162 163 // Function pointers into the AAudio shared library. 164 signature_I_PPB createStreamBuilder = nullptr; 165 166 signature_I_PBPPS builder_openStream = nullptr; 167 168 signature_V_PBI builder_setBufferCapacityInFrames = nullptr; 169 signature_V_PBI builder_setChannelCount = nullptr; 170 signature_V_PBI builder_setDeviceId = nullptr; 171 signature_V_PBI builder_setDirection = nullptr; 172 signature_V_PBI builder_setFormat = nullptr; 173 signature_V_PBI builder_setFramesPerDataCallback = nullptr; 174 signature_V_PBI builder_setPerformanceMode = nullptr; 175 signature_V_PBI builder_setSampleRate = nullptr; 176 signature_V_PBI builder_setSharingMode = nullptr; 177 signature_V_PBU builder_setChannelMask = nullptr; 178 179 signature_V_PBI builder_setUsage = nullptr; 180 signature_V_PBI builder_setContentType = nullptr; 181 signature_V_PBI builder_setInputPreset = nullptr; 182 signature_V_PBI builder_setSessionId = nullptr; 183 184 signature_V_PBCPH builder_setPackageName = nullptr; 185 signature_V_PBCPH builder_setAttributionTag = nullptr; 186 187 signature_V_PBPDPV builder_setDataCallback = nullptr; 188 signature_V_PBPEPV builder_setErrorCallback = nullptr; 189 190 signature_I_PB builder_delete = nullptr; 191 192 signature_F_PS stream_getFormat = nullptr; 193 194 signature_I_PSPVIL stream_read = nullptr; 195 signature_I_PSCPVIL stream_write = nullptr; 196 197 signature_I_PSTPTL stream_waitForStateChange = nullptr; 198 199 signature_I_PSKPLPL stream_getTimestamp = nullptr; 200 201 signature_I_PS stream_close = nullptr; 202 203 signature_I_PS stream_getChannelCount = nullptr; 204 signature_I_PS stream_getDeviceId = nullptr; 205 206 signature_I_PS stream_getBufferSize = nullptr; 207 signature_I_PS stream_getBufferCapacity = nullptr; 208 signature_I_PS stream_getFramesPerBurst = nullptr; 209 signature_I_PS stream_getState = nullptr; 210 signature_I_PS stream_getPerformanceMode = nullptr; 211 signature_I_PS stream_getSampleRate = nullptr; 212 signature_I_PS stream_getSharingMode = nullptr; 213 signature_I_PS stream_getXRunCount = nullptr; 214 215 signature_I_PSI stream_setBufferSize = nullptr; 216 signature_I_PS stream_requestStart = nullptr; 217 signature_I_PS stream_requestPause = nullptr; 218 signature_I_PS stream_requestFlush = nullptr; 219 signature_I_PS stream_requestStop = nullptr; 220 221 signature_L_PS stream_getFramesRead = nullptr; 222 signature_L_PS stream_getFramesWritten = nullptr; 223 224 signature_CPH_I convertResultToText = nullptr; 225 226 signature_I_PS stream_getUsage = nullptr; 227 signature_I_PS stream_getContentType = nullptr; 228 signature_I_PS stream_getInputPreset = nullptr; 229 signature_I_PS stream_getSessionId = nullptr; 230 231 signature_U_PS stream_getChannelMask = nullptr; 232 233 private: AAudioLoader()234 AAudioLoader() {} 235 ~AAudioLoader(); 236 237 // Load function pointers for specific signatures. 238 signature_I_PPB load_I_PPB(const char *name); 239 signature_CPH_I load_CPH_I(const char *name); 240 signature_V_PBI load_V_PBI(const char *name); 241 signature_V_PBCPH load_V_PBCPH(const char *name); 242 signature_V_PBPDPV load_V_PBPDPV(const char *name); 243 signature_V_PBPEPV load_V_PBPEPV(const char *name); 244 signature_I_PB load_I_PB(const char *name); 245 signature_I_PBPPS load_I_PBPPS(const char *name); 246 signature_I_PS load_I_PS(const char *name); 247 signature_L_PS load_L_PS(const char *name); 248 signature_F_PS load_F_PS(const char *name); 249 signature_B_PS load_B_PS(const char *name); 250 signature_I_PSI load_I_PSI(const char *name); 251 signature_I_PSPVIL load_I_PSPVIL(const char *name); 252 signature_I_PSCPVIL load_I_PSCPVIL(const char *name); 253 signature_I_PSTPTL load_I_PSTPTL(const char *name); 254 signature_I_PSKPLPL load_I_PSKPLPL(const char *name); 255 signature_V_PBU load_V_PBU(const char *name); 256 signature_U_PS load_U_PS(const char *name); 257 258 void *mLibHandle = nullptr; 259 }; 260 261 } // namespace oboe 262 263 #endif //OBOE_AAUDIO_LOADER_H_ 264