Mercurial > sdl-ios-xcode
annotate src/core/android/SDL_android.cpp @ 5104:42a7591530d5
Since we're directly reading and writing 'active' from different threads, it needs to be flagged volatile.
author | Sam Lantinga <slouken@libsdl.org> |
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date | Wed, 26 Jan 2011 19:20:16 -0800 |
parents | ed1d54f1290a |
children | c66b2a778b7e |
rev | line source |
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1 /* |
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2 SDL - Simple DirectMedia Layer |
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3 Copyright (C) 1997-2010 Sam Lantinga |
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4 |
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5 This library is free software; you can redistribute it and/or |
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6 modify it under the terms of the GNU Lesser General Public |
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7 License as published by the Free Software Foundation; either |
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8 version 2.1 of the License, or (at your option) any later version. |
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9 |
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10 This library is distributed in the hope that it will be useful, |
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11 but WITHOUT ANY WARRANTY; without even the implied warranty of |
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12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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13 Lesser General Public License for more details. |
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14 |
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15 You should have received a copy of the GNU Lesser General Public |
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16 License along with this library; if not, write to the Free Software |
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17 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
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18 |
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19 Sam Lantinga |
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20 slouken@libsdl.org |
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21 */ |
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22 #include "SDL_config.h" |
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23 |
4989 | 24 #include "SDL_android.h" |
25 | |
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26 extern "C" { |
5094 | 27 #include "../../events/SDL_events_c.h" |
28 #include "../../video/android/SDL_androidkeyboard.h" | |
29 #include "../../video/android/SDL_androidtouch.h" | |
30 #include "../../video/android/SDL_androidvideo.h" | |
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31 |
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32 /* Impelemented in audio/android/SDL_androidaudio.c */ |
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33 extern void Android_RunAudioThread(); |
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34 } // C |
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35 |
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36 /******************************************************************************* |
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37 This file links the Java side of Android with libsdl |
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38 *******************************************************************************/ |
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39 #include <jni.h> |
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40 #include <android/log.h> |
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41 |
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42 |
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43 /******************************************************************************* |
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44 Globals |
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45 *******************************************************************************/ |
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46 static JNIEnv* mEnv = NULL; |
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47 static JNIEnv* mAudioEnv = NULL; |
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48 |
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49 // Main activity |
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50 static jclass mActivityClass; |
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51 |
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52 // method signatures |
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53 static jmethodID midCreateGLContext; |
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54 static jmethodID midFlipBuffers; |
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55 static jmethodID midAudioInit; |
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56 static jmethodID midAudioWriteShortBuffer; |
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57 static jmethodID midAudioWriteByteBuffer; |
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58 static jmethodID midAudioQuit; |
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59 |
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60 // Accelerometer data storage |
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61 static float fLastAccelerometer[3]; |
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62 |
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63 |
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64 /******************************************************************************* |
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65 Functions called by JNI |
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66 *******************************************************************************/ |
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67 |
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68 // Library init |
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69 extern "C" jint JNI_OnLoad(JavaVM* vm, void* reserved) |
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70 { |
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71 return JNI_VERSION_1_4; |
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72 } |
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73 |
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74 // Called before SDL_main() to initialize JNI bindings |
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75 extern "C" void SDL_Android_Init(JNIEnv* env, jclass cls) |
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76 { |
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77 __android_log_print(ANDROID_LOG_INFO, "SDL", "SDL_Android_Init()"); |
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78 |
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79 mEnv = env; |
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80 mActivityClass = cls; |
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81 |
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82 midCreateGLContext = mEnv->GetStaticMethodID(mActivityClass, |
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83 "createGLContext","()V"); |
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84 midFlipBuffers = mEnv->GetStaticMethodID(mActivityClass, |
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85 "flipBuffers","()V"); |
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86 midAudioInit = mEnv->GetStaticMethodID(mActivityClass, |
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87 "audioInit", "(IZZI)Ljava/lang/Object;"); |
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88 midAudioWriteShortBuffer = mEnv->GetStaticMethodID(mActivityClass, |
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89 "audioWriteShortBuffer", "([S)V"); |
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90 midAudioWriteByteBuffer = mEnv->GetStaticMethodID(mActivityClass, |
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91 "audioWriteByteBuffer", "([B)V"); |
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92 midAudioQuit = mEnv->GetStaticMethodID(mActivityClass, |
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93 "audioQuit", "()V"); |
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94 |
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95 if(!midCreateGLContext || !midFlipBuffers || !midAudioInit || |
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96 !midAudioWriteShortBuffer || !midAudioWriteByteBuffer || !midAudioQuit) { |
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97 __android_log_print(ANDROID_LOG_WARN, "SDL", "SDL: Couldn't locate Java callbacks, check that they're named and typed correctly"); |
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98 } |
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99 } |
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100 |
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101 // Resize |
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102 extern "C" void Java_org_libsdl_app_SDLActivity_onNativeResize( |
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103 JNIEnv* env, jclass jcls, |
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104 jint width, jint height, jint format) |
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105 { |
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106 Android_SetScreenResolution(width, height, format); |
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107 } |
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108 |
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109 // Keydown |
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110 extern "C" void Java_org_libsdl_app_SDLActivity_onNativeKeyDown( |
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111 JNIEnv* env, jclass jcls, jint keycode) |
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112 { |
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113 Android_OnKeyDown(keycode); |
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114 } |
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115 |
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116 // Keyup |
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117 extern "C" void Java_org_libsdl_app_SDLActivity_onNativeKeyUp( |
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118 JNIEnv* env, jclass jcls, jint keycode) |
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119 { |
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120 Android_OnKeyUp(keycode); |
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121 } |
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122 |
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123 // Touch |
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124 extern "C" void Java_org_libsdl_app_SDLActivity_onNativeTouch( |
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125 JNIEnv* env, jclass jcls, |
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126 jint action, jfloat x, jfloat y, jfloat p) |
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127 { |
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128 Android_OnTouch(action, x, y, p); |
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129 } |
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130 |
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131 // Accelerometer |
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132 extern "C" void Java_org_libsdl_app_SDLActivity_onNativeAccel( |
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133 JNIEnv* env, jclass jcls, |
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134 jfloat x, jfloat y, jfloat z) |
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135 { |
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136 fLastAccelerometer[0] = x; |
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137 fLastAccelerometer[1] = y; |
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138 fLastAccelerometer[2] = z; |
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139 } |
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140 |
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141 // Quit |
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142 extern "C" void Java_org_libsdl_app_SDLActivity_nativeQuit( |
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143 JNIEnv* env, jclass cls) |
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144 { |
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145 // Inject a SDL_QUIT event |
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146 SDL_SendQuit(); |
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147 } |
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148 |
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149 extern "C" void Java_org_libsdl_app_SDLActivity_nativeRunAudioThread( |
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150 JNIEnv* env, jclass cls) |
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151 { |
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152 /* This is the audio thread, with a different environment */ |
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153 mAudioEnv = env; |
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154 |
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155 Android_RunAudioThread(); |
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156 } |
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157 |
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158 |
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159 /******************************************************************************* |
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160 Functions called by SDL into Java |
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161 *******************************************************************************/ |
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163 { |
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164 mEnv->CallStaticVoidMethod(mActivityClass, midCreateGLContext); |
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165 } |
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166 |
4989 | 167 extern "C" void Android_JNI_SwapWindow() |
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168 { |
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169 mEnv->CallStaticVoidMethod(mActivityClass, midFlipBuffers); |
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170 } |
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171 |
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172 extern "C" void Android_JNI_SetActivityTitle(const char *title) |
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173 { |
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174 jmethodID mid; |
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175 |
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176 mid = mEnv->GetStaticMethodID(mActivityClass,"setActivityTitle","(Ljava/lang/String;)V"); |
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177 if (mid) { |
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178 mEnv->CallStaticVoidMethod(mActivityClass, mid, mEnv->NewStringUTF(title)); |
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179 } |
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180 } |
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181 |
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182 extern "C" void Android_JNI_GetAccelerometerValues(float values[3]) |
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183 { |
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184 int i; |
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185 for (i = 0; i < 3; ++i) { |
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186 values[i] = fLastAccelerometer[i]; |
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187 } |
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188 } |
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189 |
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190 // |
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191 // Audio support |
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192 // |
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193 static jboolean audioBuffer16Bit = JNI_FALSE; |
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194 static jboolean audioBufferStereo = JNI_FALSE; |
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195 static jobject audioBuffer = NULL; |
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196 static void* audioBufferPinned = NULL; |
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197 |
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198 extern "C" int Android_JNI_OpenAudioDevice(int sampleRate, int is16Bit, int channelCount, int desiredBufferFrames) |
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199 { |
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200 int audioBufferFrames; |
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201 |
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202 __android_log_print(ANDROID_LOG_VERBOSE, "SDL", "SDL audio: opening device"); |
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203 audioBuffer16Bit = is16Bit; |
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204 audioBufferStereo = channelCount > 1; |
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205 |
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206 audioBuffer = mEnv->CallStaticObjectMethod(mActivityClass, midAudioInit, sampleRate, audioBuffer16Bit, audioBufferStereo, desiredBufferFrames); |
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207 |
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208 if (audioBuffer == NULL) { |
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209 __android_log_print(ANDROID_LOG_WARN, "SDL", "SDL audio: didn't get back a good audio buffer!"); |
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210 return 0; |
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211 } |
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212 audioBuffer = mEnv->NewGlobalRef(audioBuffer); |
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213 |
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214 jboolean isCopy = JNI_FALSE; |
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215 if (audioBuffer16Bit) { |
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216 audioBufferPinned = mEnv->GetShortArrayElements((jshortArray)audioBuffer, &isCopy); |
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217 audioBufferFrames = mEnv->GetArrayLength((jshortArray)audioBuffer); |
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218 } else { |
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219 audioBufferPinned = mEnv->GetByteArrayElements((jbyteArray)audioBuffer, &isCopy); |
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220 audioBufferFrames = mEnv->GetArrayLength((jbyteArray)audioBuffer); |
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221 } |
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222 if (audioBufferStereo) { |
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223 audioBufferFrames /= 2; |
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224 } |
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225 |
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226 return audioBufferFrames; |
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227 } |
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228 |
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229 extern "C" void * Android_JNI_GetAudioBuffer() |
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230 { |
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231 return audioBufferPinned; |
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232 } |
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233 |
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234 extern "C" void Android_JNI_WriteAudioBuffer() |
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235 { |
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236 if (audioBuffer16Bit) { |
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237 mAudioEnv->ReleaseShortArrayElements((jshortArray)audioBuffer, (jshort *)audioBufferPinned, JNI_COMMIT); |
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238 mAudioEnv->CallStaticVoidMethod(mActivityClass, midAudioWriteShortBuffer, (jshortArray)audioBuffer); |
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239 } else { |
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240 mAudioEnv->ReleaseByteArrayElements((jbyteArray)audioBuffer, (jbyte *)audioBufferPinned, JNI_COMMIT); |
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241 mAudioEnv->CallStaticVoidMethod(mActivityClass, midAudioWriteByteBuffer, (jbyteArray)audioBuffer); |
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242 } |
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243 |
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244 /* JNI_COMMIT means the changes are committed to the VM but the buffer remains pinned */ |
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245 } |
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246 |
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247 extern "C" void Android_JNI_CloseAudioDevice() |
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248 { |
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249 mEnv->CallStaticVoidMethod(mActivityClass, midAudioQuit); |
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250 |
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251 if (audioBuffer) { |
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252 mEnv->DeleteGlobalRef(audioBuffer); |
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253 audioBuffer = NULL; |
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254 audioBufferPinned = NULL; |
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255 } |
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256 } |
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257 |
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258 /* vi: set ts=4 sw=4 expandtab: */ |