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/*
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slouken@5535
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Simple DirectMedia Layer
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Copyright (C) 1997-2011 Sam Lantinga <slouken@libsdl.org>
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This software is provided 'as-is', without any express or implied
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warranty. In no event will the authors be held liable for any damages
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arising from the use of this software.
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Permission is granted to anyone to use this software for any purpose,
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including commercial applications, and to alter it and redistribute it
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freely, subject to the following restrictions:
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1. The origin of this software must not be misrepresented; you must not
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claim that you wrote the original software. If you use this software
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in a product, an acknowledgment in the product documentation would be
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appreciated but is not required.
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2. Altered source versions must be plainly marked as such, and must not be
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misrepresented as being the original software.
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3. This notice may not be removed or altered from any source distribution.
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*/
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#include "SDL_config.h"
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#include "SDL_stdinc.h"
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#include "SDL_android.h"
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extern "C" {
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#include "../../events/SDL_events_c.h"
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#include "../../video/android/SDL_androidkeyboard.h"
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#include "../../video/android/SDL_androidtouch.h"
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#include "../../video/android/SDL_androidvideo.h"
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/* Impelemented in audio/android/SDL_androidaudio.c */
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extern void Android_RunAudioThread();
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} // C
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/*******************************************************************************
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This file links the Java side of Android with libsdl
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*******************************************************************************/
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#include <jni.h>
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#include <android/log.h>
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/*******************************************************************************
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Globals
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*******************************************************************************/
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static JNIEnv* mEnv = NULL;
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static JNIEnv* mAudioEnv = NULL;
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// Main activity
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static jclass mActivityClass;
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// method signatures
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static jmethodID midCreateGLContext;
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static jmethodID midFlipBuffers;
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static jmethodID midAudioInit;
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static jmethodID midAudioWriteShortBuffer;
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static jmethodID midAudioWriteByteBuffer;
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static jmethodID midAudioQuit;
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// Accelerometer data storage
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static float fLastAccelerometer[3];
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/*******************************************************************************
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Functions called by JNI
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*******************************************************************************/
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// Library init
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extern "C" jint JNI_OnLoad(JavaVM* vm, void* reserved)
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{
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return JNI_VERSION_1_4;
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}
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// Called before SDL_main() to initialize JNI bindings
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extern "C" void SDL_Android_Init(JNIEnv* env, jclass cls)
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{
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__android_log_print(ANDROID_LOG_INFO, "SDL", "SDL_Android_Init()");
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mEnv = env;
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mActivityClass = cls;
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midCreateGLContext = mEnv->GetStaticMethodID(mActivityClass,
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"createGLContext","(II)Z");
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midFlipBuffers = mEnv->GetStaticMethodID(mActivityClass,
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"flipBuffers","()V");
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midAudioInit = mEnv->GetStaticMethodID(mActivityClass,
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"audioInit", "(IZZI)Ljava/lang/Object;");
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midAudioWriteShortBuffer = mEnv->GetStaticMethodID(mActivityClass,
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"audioWriteShortBuffer", "([S)V");
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midAudioWriteByteBuffer = mEnv->GetStaticMethodID(mActivityClass,
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"audioWriteByteBuffer", "([B)V");
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midAudioQuit = mEnv->GetStaticMethodID(mActivityClass,
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"audioQuit", "()V");
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if(!midCreateGLContext || !midFlipBuffers || !midAudioInit ||
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!midAudioWriteShortBuffer || !midAudioWriteByteBuffer || !midAudioQuit) {
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__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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}
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}
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// Resize
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extern "C" void Java_org_libsdl_app_SDLActivity_onNativeResize(
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JNIEnv* env, jclass jcls,
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jint width, jint height, jint format)
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{
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Android_SetScreenResolution(width, height, format);
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}
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// Keydown
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extern "C" void Java_org_libsdl_app_SDLActivity_onNativeKeyDown(
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JNIEnv* env, jclass jcls, jint keycode)
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{
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Android_OnKeyDown(keycode);
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}
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// Keyup
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extern "C" void Java_org_libsdl_app_SDLActivity_onNativeKeyUp(
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JNIEnv* env, jclass jcls, jint keycode)
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{
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Android_OnKeyUp(keycode);
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}
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// Touch
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extern "C" void Java_org_libsdl_app_SDLActivity_onNativeTouch(
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JNIEnv* env, jclass jcls,
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jint action, jfloat x, jfloat y, jfloat p)
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{
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Android_OnTouch(action, x, y, p);
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}
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// Accelerometer
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extern "C" void Java_org_libsdl_app_SDLActivity_onNativeAccel(
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JNIEnv* env, jclass jcls,
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jfloat x, jfloat y, jfloat z)
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{
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fLastAccelerometer[0] = x;
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fLastAccelerometer[1] = y;
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fLastAccelerometer[2] = z;
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}
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// Quit
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extern "C" void Java_org_libsdl_app_SDLActivity_nativeQuit(
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JNIEnv* env, jclass cls)
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{
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// Inject a SDL_QUIT event
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SDL_SendQuit();
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}
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extern "C" void Java_org_libsdl_app_SDLActivity_nativeRunAudioThread(
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JNIEnv* env, jclass cls)
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{
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/* This is the audio thread, with a different environment */
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mAudioEnv = env;
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Android_RunAudioThread();
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}
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/*******************************************************************************
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Functions called by SDL into Java
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*******************************************************************************/
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slouken@5222
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extern "C" SDL_bool Android_JNI_CreateContext(int majorVersion, int minorVersion)
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{
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slouken@5222
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if (mEnv->CallStaticBooleanMethod(mActivityClass, midCreateGLContext, majorVersion, minorVersion)) {
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slouken@5222
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return SDL_TRUE;
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slouken@5222
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} else {
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return SDL_FALSE;
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slouken@5222
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}
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}
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extern "C" void Android_JNI_SwapWindow()
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{
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slouken@4998
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mEnv->CallStaticVoidMethod(mActivityClass, midFlipBuffers);
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slouken@4998
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}
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extern "C" void Android_JNI_SetActivityTitle(const char *title)
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{
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jmethodID mid;
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mid = mEnv->GetStaticMethodID(mActivityClass,"setActivityTitle","(Ljava/lang/String;)V");
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if (mid) {
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mEnv->CallStaticVoidMethod(mActivityClass, mid, mEnv->NewStringUTF(title));
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}
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}
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slouken@5000
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extern "C" void Android_JNI_GetAccelerometerValues(float values[3])
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slouken@5000
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{
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slouken@5000
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int i;
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slouken@5000
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for (i = 0; i < 3; ++i) {
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values[i] = fLastAccelerometer[i];
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}
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slouken@5000
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}
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slouken@5000
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//
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// Audio support
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//
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slouken@4996
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static jboolean audioBuffer16Bit = JNI_FALSE;
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static jboolean audioBufferStereo = JNI_FALSE;
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static jobject audioBuffer = NULL;
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static void* audioBufferPinned = NULL;
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extern "C" int Android_JNI_OpenAudioDevice(int sampleRate, int is16Bit, int channelCount, int desiredBufferFrames)
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{
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int audioBufferFrames;
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slouken@4996
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__android_log_print(ANDROID_LOG_VERBOSE, "SDL", "SDL audio: opening device");
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audioBuffer16Bit = is16Bit;
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audioBufferStereo = channelCount > 1;
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audioBuffer = mEnv->CallStaticObjectMethod(mActivityClass, midAudioInit, sampleRate, audioBuffer16Bit, audioBufferStereo, desiredBufferFrames);
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if (audioBuffer == NULL) {
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__android_log_print(ANDROID_LOG_WARN, "SDL", "SDL audio: didn't get back a good audio buffer!");
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return 0;
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}
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audioBuffer = mEnv->NewGlobalRef(audioBuffer);
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jboolean isCopy = JNI_FALSE;
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if (audioBuffer16Bit) {
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audioBufferPinned = mEnv->GetShortArrayElements((jshortArray)audioBuffer, &isCopy);
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audioBufferFrames = mEnv->GetArrayLength((jshortArray)audioBuffer);
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} else {
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audioBufferPinned = mEnv->GetByteArrayElements((jbyteArray)audioBuffer, &isCopy);
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audioBufferFrames = mEnv->GetArrayLength((jbyteArray)audioBuffer);
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}
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slouken@4996
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if (audioBufferStereo) {
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audioBufferFrames /= 2;
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}
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return audioBufferFrames;
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slouken@4995
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}
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slouken@4995
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slouken@4996
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extern "C" void * Android_JNI_GetAudioBuffer()
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{
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slouken@4996
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return audioBufferPinned;
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slouken@4995
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}
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extern "C" void Android_JNI_WriteAudioBuffer()
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{
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slouken@4996
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if (audioBuffer16Bit) {
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slouken@4996
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mAudioEnv->ReleaseShortArrayElements((jshortArray)audioBuffer, (jshort *)audioBufferPinned, JNI_COMMIT);
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slouken@4998
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mAudioEnv->CallStaticVoidMethod(mActivityClass, midAudioWriteShortBuffer, (jshortArray)audioBuffer);
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slouken@4996
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} else {
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slouken@4996
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mAudioEnv->ReleaseByteArrayElements((jbyteArray)audioBuffer, (jbyte *)audioBufferPinned, JNI_COMMIT);
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slouken@4998
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mAudioEnv->CallStaticVoidMethod(mActivityClass, midAudioWriteByteBuffer, (jbyteArray)audioBuffer);
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slouken@4996
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}
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slouken@4964
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slouken@4996
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/* JNI_COMMIT means the changes are committed to the VM but the buffer remains pinned */
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slouken@4995
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}
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slouken@4995
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slouken@4995
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extern "C" void Android_JNI_CloseAudioDevice()
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slouken@4995
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{
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slouken@4998
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mEnv->CallStaticVoidMethod(mActivityClass, midAudioQuit);
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slouken@4964
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slouken@4997
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if (audioBuffer) {
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slouken@4997
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mEnv->DeleteGlobalRef(audioBuffer);
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slouken@4997
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257 |
audioBuffer = NULL;
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slouken@4997
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audioBufferPinned = NULL;
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slouken@4997
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}
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slouken@4964
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260 |
}
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slouken@4981
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tim@5650
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262 |
// Test for an exception and call SDL_SetError with its detail if one occurs
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tim@5650
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static bool Android_JNI_ExceptionOccurred()
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tim@5650
|
264 |
{
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tim@5650
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jthrowable exception = mEnv->ExceptionOccurred();
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tim@5650
|
266 |
if (exception != NULL) {
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tim@5650
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267 |
jmethodID mid;
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tim@5650
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tim@5650
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// Until this happens most JNI operations have undefined behaviour
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tim@5650
|
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mEnv->ExceptionClear();
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tim@5650
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tim@5650
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jclass exceptionClass = mEnv->GetObjectClass(exception);
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tim@5650
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jclass classClass = mEnv->FindClass("java/lang/Class");
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tim@5650
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tim@5650
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mid = mEnv->GetMethodID(classClass, "getName", "()Ljava/lang/String;");
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tim@5650
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jstring exceptionName = (jstring)mEnv->CallObjectMethod(exceptionClass, mid);
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tim@5650
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const char* exceptionNameUTF8 = mEnv->GetStringUTFChars(exceptionName, 0);
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tim@5650
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tim@5650
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mid = mEnv->GetMethodID(exceptionClass, "getMessage", "()Ljava/lang/String;");
|
icculus@5860
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jstring exceptionMessage = (jstring)mEnv->CallObjectMethod(exception, mid);
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tim@5650
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tim@5650
|
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if (exceptionMessage != NULL) {
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tim@5650
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283 |
const char* exceptionMessageUTF8 = mEnv->GetStringUTFChars(
|
tim@5650
|
284 |
exceptionMessage, 0);
|
tim@5650
|
285 |
SDL_SetError("%s: %s", exceptionNameUTF8, exceptionMessageUTF8);
|
tim@5650
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mEnv->ReleaseStringUTFChars(exceptionMessage, exceptionMessageUTF8);
|
tim@5650
|
287 |
mEnv->DeleteLocalRef(exceptionMessage);
|
tim@5650
|
288 |
} else {
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tim@5650
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SDL_SetError("%s", exceptionNameUTF8);
|
tim@5650
|
290 |
}
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tim@5650
|
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tim@5650
|
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mEnv->ReleaseStringUTFChars(exceptionName, exceptionNameUTF8);
|
tim@5650
|
293 |
mEnv->DeleteLocalRef(exceptionName);
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tim@5650
|
294 |
mEnv->DeleteLocalRef(classClass);
|
tim@5650
|
295 |
mEnv->DeleteLocalRef(exceptionClass);
|
tim@5650
|
296 |
mEnv->DeleteLocalRef(exception);
|
tim@5650
|
297 |
|
tim@5650
|
298 |
return true;
|
tim@5650
|
299 |
}
|
tim@5650
|
300 |
|
tim@5650
|
301 |
return false;
|
tim@5650
|
302 |
}
|
tim@5650
|
303 |
|
icculus@5582
|
304 |
static int Android_JNI_FileOpen(SDL_RWops* ctx)
|
icculus@5582
|
305 |
{
|
tim@5650
|
306 |
int result = 0;
|
tim@5650
|
307 |
|
tim@5650
|
308 |
jmethodID mid;
|
tim@5650
|
309 |
jobject context;
|
tim@5650
|
310 |
jobject assetManager;
|
tim@5650
|
311 |
jobject inputStream;
|
tim@5650
|
312 |
jclass channels;
|
tim@5650
|
313 |
jobject readableByteChannel;
|
tim@5650
|
314 |
jstring fileNameJString;
|
tim@5650
|
315 |
|
tim@5650
|
316 |
bool allocatedLocalFrame = false;
|
tim@5650
|
317 |
|
tim@5650
|
318 |
if (mEnv->PushLocalFrame(16) < 0) {
|
tim@5650
|
319 |
SDL_SetError("Failed to allocate enough JVM local references");
|
tim@5650
|
320 |
goto failure;
|
tim@5650
|
321 |
} else {
|
tim@5650
|
322 |
allocatedLocalFrame = true;
|
tim@5650
|
323 |
}
|
tim@5650
|
324 |
|
tim@5650
|
325 |
fileNameJString = (jstring)ctx->hidden.androidio.fileName;
|
icculus@5582
|
326 |
|
icculus@5582
|
327 |
// context = SDLActivity.getContext();
|
tim@5650
|
328 |
mid = mEnv->GetStaticMethodID(mActivityClass,
|
icculus@5582
|
329 |
"getContext","()Landroid/content/Context;");
|
tim@5650
|
330 |
context = mEnv->CallStaticObjectMethod(mActivityClass, mid);
|
icculus@5582
|
331 |
|
icculus@5582
|
332 |
// assetManager = context.getAssets();
|
icculus@5582
|
333 |
mid = mEnv->GetMethodID(mEnv->GetObjectClass(context),
|
tim@5650
|
334 |
"getAssets", "()Landroid/content/res/AssetManager;");
|
tim@5650
|
335 |
assetManager = mEnv->CallObjectMethod(context, mid);
|
icculus@5582
|
336 |
|
icculus@5582
|
337 |
// inputStream = assetManager.open(<filename>);
|
icculus@5582
|
338 |
mid = mEnv->GetMethodID(mEnv->GetObjectClass(assetManager),
|
icculus@5582
|
339 |
"open", "(Ljava/lang/String;)Ljava/io/InputStream;");
|
tim@5650
|
340 |
inputStream = mEnv->CallObjectMethod(assetManager, mid, fileNameJString);
|
tim@5650
|
341 |
if (Android_JNI_ExceptionOccurred()) {
|
tim@5650
|
342 |
goto failure;
|
icculus@5582
|
343 |
}
|
icculus@5582
|
344 |
|
tim@5650
|
345 |
ctx->hidden.androidio.inputStream = inputStream;
|
tim@5650
|
346 |
ctx->hidden.androidio.inputStreamRef = mEnv->NewGlobalRef(inputStream);
|
tim@5650
|
347 |
|
icculus@5582
|
348 |
// Store .skip id for seeking purposes
|
icculus@5582
|
349 |
mid = mEnv->GetMethodID(mEnv->GetObjectClass(inputStream),
|
icculus@5582
|
350 |
"skip", "(J)J");
|
icculus@5582
|
351 |
ctx->hidden.androidio.skipMethod = mid;
|
icculus@5582
|
352 |
|
icculus@5582
|
353 |
// Despite all the visible documentation on [Asset]InputStream claiming
|
icculus@5582
|
354 |
// that the .available() method is not guaranteed to return the entire file
|
icculus@5582
|
355 |
// size, comments in <sdk>/samples/<ver>/ApiDemos/src/com/example/ ...
|
icculus@5582
|
356 |
// android/apis/content/ReadAsset.java imply that Android's
|
icculus@5582
|
357 |
// AssetInputStream.available() /will/ always return the total file size
|
icculus@5582
|
358 |
|
icculus@5582
|
359 |
// size = inputStream.available();
|
icculus@5582
|
360 |
mid = mEnv->GetMethodID(mEnv->GetObjectClass(inputStream),
|
icculus@5582
|
361 |
"available", "()I");
|
icculus@5582
|
362 |
ctx->hidden.androidio.size = mEnv->CallIntMethod(inputStream, mid);
|
tim@5650
|
363 |
if (Android_JNI_ExceptionOccurred()) {
|
tim@5650
|
364 |
goto failure;
|
icculus@5582
|
365 |
}
|
icculus@5582
|
366 |
|
icculus@5582
|
367 |
// readableByteChannel = Channels.newChannel(inputStream);
|
tim@5650
|
368 |
channels = mEnv->FindClass("java/nio/channels/Channels");
|
icculus@5582
|
369 |
mid = mEnv->GetStaticMethodID(channels,
|
icculus@5582
|
370 |
"newChannel",
|
icculus@5582
|
371 |
"(Ljava/io/InputStream;)Ljava/nio/channels/ReadableByteChannel;");
|
tim@5650
|
372 |
readableByteChannel = mEnv->CallStaticObjectMethod(
|
icculus@5582
|
373 |
channels, mid, inputStream);
|
tim@5650
|
374 |
if (Android_JNI_ExceptionOccurred()) {
|
tim@5650
|
375 |
goto failure;
|
icculus@5582
|
376 |
}
|
icculus@5582
|
377 |
|
tim@5650
|
378 |
ctx->hidden.androidio.readableByteChannel = readableByteChannel;
|
tim@5650
|
379 |
ctx->hidden.androidio.readableByteChannelRef =
|
tim@5650
|
380 |
mEnv->NewGlobalRef(readableByteChannel);
|
tim@5650
|
381 |
|
icculus@5582
|
382 |
// Store .read id for reading purposes
|
icculus@5582
|
383 |
mid = mEnv->GetMethodID(mEnv->GetObjectClass(readableByteChannel),
|
icculus@5582
|
384 |
"read", "(Ljava/nio/ByteBuffer;)I");
|
icculus@5582
|
385 |
ctx->hidden.androidio.readMethod = mid;
|
icculus@5582
|
386 |
|
icculus@5582
|
387 |
ctx->hidden.androidio.position = 0;
|
icculus@5582
|
388 |
|
tim@5650
|
389 |
if (false) {
|
tim@5650
|
390 |
failure:
|
tim@5650
|
391 |
result = -1;
|
tim@5650
|
392 |
|
tim@5650
|
393 |
mEnv->DeleteGlobalRef((jobject)ctx->hidden.androidio.fileNameRef);
|
tim@5650
|
394 |
|
tim@5650
|
395 |
if(ctx->hidden.androidio.inputStreamRef != NULL) {
|
tim@5650
|
396 |
mEnv->DeleteGlobalRef((jobject)ctx->hidden.androidio.inputStreamRef);
|
tim@5650
|
397 |
}
|
tim@5650
|
398 |
}
|
tim@5650
|
399 |
|
tim@5650
|
400 |
if (allocatedLocalFrame) {
|
tim@5650
|
401 |
mEnv->PopLocalFrame(NULL);
|
tim@5650
|
402 |
}
|
tim@5650
|
403 |
|
tim@5650
|
404 |
return result;
|
icculus@5582
|
405 |
}
|
icculus@5582
|
406 |
|
icculus@5582
|
407 |
extern "C" int Android_JNI_FileOpen(SDL_RWops* ctx,
|
icculus@5582
|
408 |
const char* fileName, const char*)
|
icculus@5582
|
409 |
{
|
icculus@5582
|
410 |
if (!ctx) {
|
icculus@5582
|
411 |
return -1;
|
icculus@5582
|
412 |
}
|
icculus@5582
|
413 |
|
icculus@5582
|
414 |
jstring fileNameJString = mEnv->NewStringUTF(fileName);
|
icculus@5582
|
415 |
ctx->hidden.androidio.fileName = fileNameJString;
|
icculus@5582
|
416 |
ctx->hidden.androidio.fileNameRef = mEnv->NewGlobalRef(fileNameJString);
|
tim@5650
|
417 |
ctx->hidden.androidio.inputStreamRef = NULL;
|
tim@5650
|
418 |
mEnv->DeleteLocalRef(fileNameJString);
|
icculus@5582
|
419 |
|
icculus@5582
|
420 |
return Android_JNI_FileOpen(ctx);
|
icculus@5582
|
421 |
}
|
icculus@5582
|
422 |
|
icculus@5582
|
423 |
extern "C" size_t Android_JNI_FileRead(SDL_RWops* ctx, void* buffer,
|
icculus@5582
|
424 |
size_t size, size_t maxnum)
|
icculus@5582
|
425 |
{
|
icculus@5582
|
426 |
int bytesRemaining = size * maxnum;
|
icculus@5582
|
427 |
int bytesRead = 0;
|
icculus@5582
|
428 |
|
icculus@5582
|
429 |
jobject readableByteChannel = (jobject)ctx->hidden.androidio.readableByteChannel;
|
icculus@5582
|
430 |
jmethodID readMethod = (jmethodID)ctx->hidden.androidio.readMethod;
|
icculus@5582
|
431 |
jobject byteBuffer = mEnv->NewDirectByteBuffer(buffer, bytesRemaining);
|
icculus@5582
|
432 |
|
icculus@5582
|
433 |
while (bytesRemaining > 0) {
|
icculus@5582
|
434 |
// result = readableByteChannel.read(...);
|
icculus@5582
|
435 |
int result = mEnv->CallIntMethod(readableByteChannel, readMethod, byteBuffer);
|
icculus@5582
|
436 |
|
tim@5650
|
437 |
if (Android_JNI_ExceptionOccurred()) {
|
tim@5650
|
438 |
mEnv->DeleteLocalRef(byteBuffer);
|
icculus@5582
|
439 |
return 0;
|
icculus@5582
|
440 |
}
|
icculus@5582
|
441 |
|
icculus@5582
|
442 |
if (result < 0) {
|
icculus@5582
|
443 |
break;
|
icculus@5582
|
444 |
}
|
icculus@5582
|
445 |
|
icculus@5582
|
446 |
bytesRemaining -= result;
|
icculus@5582
|
447 |
bytesRead += result;
|
icculus@5582
|
448 |
ctx->hidden.androidio.position += result;
|
icculus@5582
|
449 |
}
|
icculus@5582
|
450 |
|
tim@5650
|
451 |
mEnv->DeleteLocalRef(byteBuffer);
|
tim@5650
|
452 |
|
icculus@5582
|
453 |
return bytesRead / size;
|
icculus@5582
|
454 |
}
|
icculus@5582
|
455 |
|
icculus@5582
|
456 |
extern "C" size_t Android_JNI_FileWrite(SDL_RWops* ctx, const void* buffer,
|
icculus@5582
|
457 |
size_t size, size_t num)
|
icculus@5582
|
458 |
{
|
icculus@5582
|
459 |
SDL_SetError("Cannot write to Android package filesystem");
|
icculus@5582
|
460 |
return 0;
|
icculus@5582
|
461 |
}
|
icculus@5582
|
462 |
|
icculus@5582
|
463 |
static int Android_JNI_FileClose(SDL_RWops* ctx, bool release)
|
icculus@5582
|
464 |
{
|
icculus@5582
|
465 |
int result = 0;
|
icculus@5582
|
466 |
|
icculus@5582
|
467 |
if (ctx) {
|
icculus@5582
|
468 |
if (release) {
|
icculus@5582
|
469 |
mEnv->DeleteGlobalRef((jobject)ctx->hidden.androidio.fileNameRef);
|
icculus@5582
|
470 |
}
|
icculus@5582
|
471 |
|
icculus@5582
|
472 |
jobject inputStream = (jobject)ctx->hidden.androidio.inputStream;
|
icculus@5582
|
473 |
|
icculus@5582
|
474 |
// inputStream.close();
|
icculus@5582
|
475 |
jmethodID mid = mEnv->GetMethodID(mEnv->GetObjectClass(inputStream),
|
icculus@5582
|
476 |
"close", "()V");
|
icculus@5582
|
477 |
mEnv->CallVoidMethod(inputStream, mid);
|
icculus@5582
|
478 |
mEnv->DeleteGlobalRef((jobject)ctx->hidden.androidio.inputStreamRef);
|
icculus@5582
|
479 |
mEnv->DeleteGlobalRef((jobject)ctx->hidden.androidio.readableByteChannelRef);
|
tim@5650
|
480 |
if (Android_JNI_ExceptionOccurred()) {
|
icculus@5582
|
481 |
result = -1;
|
icculus@5582
|
482 |
}
|
icculus@5582
|
483 |
|
icculus@5582
|
484 |
if (release) {
|
icculus@5582
|
485 |
SDL_FreeRW(ctx);
|
icculus@5582
|
486 |
}
|
icculus@5582
|
487 |
}
|
icculus@5582
|
488 |
|
icculus@5582
|
489 |
return result;
|
icculus@5582
|
490 |
}
|
icculus@5582
|
491 |
|
icculus@5582
|
492 |
|
icculus@5582
|
493 |
extern "C" long Android_JNI_FileSeek(SDL_RWops* ctx, long offset, int whence)
|
icculus@5582
|
494 |
{
|
icculus@5582
|
495 |
long newPosition;
|
icculus@5582
|
496 |
|
icculus@5582
|
497 |
switch (whence) {
|
icculus@5582
|
498 |
case RW_SEEK_SET:
|
icculus@5582
|
499 |
newPosition = offset;
|
icculus@5582
|
500 |
break;
|
icculus@5582
|
501 |
case RW_SEEK_CUR:
|
icculus@5582
|
502 |
newPosition = ctx->hidden.androidio.position + offset;
|
icculus@5582
|
503 |
break;
|
icculus@5582
|
504 |
case RW_SEEK_END:
|
icculus@5582
|
505 |
newPosition = ctx->hidden.androidio.size + offset;
|
icculus@5582
|
506 |
break;
|
icculus@5582
|
507 |
default:
|
icculus@5582
|
508 |
SDL_SetError("Unknown value for 'whence'");
|
icculus@5582
|
509 |
return -1;
|
icculus@5582
|
510 |
}
|
icculus@5582
|
511 |
if (newPosition < 0) {
|
icculus@5582
|
512 |
newPosition = 0;
|
icculus@5582
|
513 |
}
|
icculus@5582
|
514 |
if (newPosition > ctx->hidden.androidio.size) {
|
icculus@5582
|
515 |
newPosition = ctx->hidden.androidio.size;
|
icculus@5582
|
516 |
}
|
icculus@5582
|
517 |
|
icculus@5582
|
518 |
long movement = newPosition - ctx->hidden.androidio.position;
|
icculus@5582
|
519 |
jobject inputStream = (jobject)ctx->hidden.androidio.inputStream;
|
icculus@5582
|
520 |
jmethodID skipMethod = (jmethodID)ctx->hidden.androidio.skipMethod;
|
icculus@5582
|
521 |
|
icculus@5582
|
522 |
if (movement > 0) {
|
icculus@5582
|
523 |
// The easy case where we're seeking forwards
|
icculus@5582
|
524 |
while (movement > 0) {
|
icculus@5582
|
525 |
// inputStream.skip(...);
|
icculus@5582
|
526 |
movement -= mEnv->CallLongMethod(inputStream, skipMethod, movement);
|
tim@5650
|
527 |
if (Android_JNI_ExceptionOccurred()) {
|
icculus@5582
|
528 |
return -1;
|
icculus@5582
|
529 |
}
|
icculus@5582
|
530 |
}
|
icculus@5582
|
531 |
} else if (movement < 0) {
|
icculus@5582
|
532 |
// We can't seek backwards so we have to reopen the file and seek
|
icculus@5582
|
533 |
// forwards which obviously isn't very efficient
|
icculus@5582
|
534 |
Android_JNI_FileClose(ctx, false);
|
icculus@5582
|
535 |
Android_JNI_FileOpen(ctx);
|
icculus@5582
|
536 |
Android_JNI_FileSeek(ctx, newPosition, RW_SEEK_SET);
|
icculus@5582
|
537 |
}
|
icculus@5582
|
538 |
|
icculus@5582
|
539 |
ctx->hidden.androidio.position = newPosition;
|
icculus@5582
|
540 |
|
icculus@5582
|
541 |
return ctx->hidden.androidio.position;
|
icculus@5582
|
542 |
}
|
icculus@5582
|
543 |
|
icculus@5582
|
544 |
extern "C" int Android_JNI_FileClose(SDL_RWops* ctx)
|
icculus@5582
|
545 |
{
|
icculus@5582
|
546 |
return Android_JNI_FileClose(ctx, true);
|
icculus@5582
|
547 |
}
|
icculus@5582
|
548 |
|
slouken@4981
|
549 |
/* vi: set ts=4 sw=4 expandtab: */
|