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annotate src/core/android/SDL_android.cpp @ 5222:9c0593fa27d6

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Create an OpenGL 1.1 context by default, if available. This is easier for people to set up and work with, and is more conformant to the way desktop OpenGL works.
author Sam Lantinga <slouken@libsdl.org>
date Mon, 07 Feb 2011 09:23:01 -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
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24 #include "SDL_android.h"
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25
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26 extern "C" {
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27 #include "../../events/SDL_events_c.h"
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28 #include "../../video/android/SDL_androidkeyboard.h"
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29 #include "../../video/android/SDL_androidtouch.h"
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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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162 extern "C" void Android_JNI_CreateContext()
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163 {
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164 mEnv->CallStaticVoidMethod(mActivityClass, midCreateGLContext);
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165 }
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166
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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);
a21501393bef Removed code from GetPrimtiveArrayCritical() experiment
Sam Lantinga <slouken@libsdl.org>
parents: 4996
diff changeset
253 audioBuffer = NULL;
a21501393bef Removed code from GetPrimtiveArrayCritical() experiment
Sam Lantinga <slouken@libsdl.org>
parents: 4996
diff changeset
254 audioBufferPinned = NULL;
a21501393bef Removed code from GetPrimtiveArrayCritical() experiment
Sam Lantinga <slouken@libsdl.org>
parents: 4996
diff changeset
255 }
4964
6c645018741e Build the SDL library as a shared object on Android, so it will work correctly with SDL_image and SDL_ttf.
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
256 }
4981
55b82067815b Fill in the video mode with the correct screen format
Sam Lantinga <slouken@libsdl.org>
parents: 4980
diff changeset
257
55b82067815b Fill in the video mode with the correct screen format
Sam Lantinga <slouken@libsdl.org>
parents: 4980
diff changeset
258 /* vi: set ts=4 sw=4 expandtab: */