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/*
* Copyright (C) 2010 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#define LOG_TAG "SurfaceTexture"
#include <stdio.h>
#include <gui/SurfaceTexture.h>
#include <gui/SurfaceTextureClient.h>
#include <android_runtime/AndroidRuntime.h>
#include <utils/Log.h>
#include <utils/misc.h>
#include "jni.h"
#include "JNIHelp.h"
// ----------------------------------------------------------------------------
namespace android {
static const char* const OutOfResourcesException =
"android/graphics/SurfaceTexture$OutOfResourcesException";
struct fields_t {
jfieldID surfaceTexture;
jmethodID postEvent;
};
static fields_t fields;
// ----------------------------------------------------------------------------
static void SurfaceTexture_setSurfaceTexture(JNIEnv* env, jobject thiz,
const sp<SurfaceTexture>& surfaceTexture)
{
SurfaceTexture* const p =
(SurfaceTexture*)env->GetIntField(thiz, fields.surfaceTexture);
if (surfaceTexture.get()) {
surfaceTexture->incStrong(thiz);
}
if (p) {
p->decStrong(thiz);
}
env->SetIntField(thiz, fields.surfaceTexture, (int)surfaceTexture.get());
}
sp<SurfaceTexture> SurfaceTexture_getSurfaceTexture(JNIEnv* env, jobject thiz)
{
sp<SurfaceTexture> surfaceTexture(
(SurfaceTexture*)env->GetIntField(thiz, fields.surfaceTexture));
return surfaceTexture;
}
sp<ANativeWindow> android_SurfaceTexture_getNativeWindow(
JNIEnv* env, jobject thiz)
{
sp<SurfaceTexture> surfaceTexture(SurfaceTexture_getSurfaceTexture(env, thiz));
sp<SurfaceTextureClient> surfaceTextureClient(surfaceTexture != NULL ?
new SurfaceTextureClient(surfaceTexture) : NULL);
return surfaceTextureClient;
}
// ----------------------------------------------------------------------------
class JNISurfaceTextureContext : public SurfaceTexture::FrameAvailableListener
{
public:
JNISurfaceTextureContext(JNIEnv* env, jobject weakThiz, jclass clazz);
virtual ~JNISurfaceTextureContext();
virtual void onFrameAvailable();
private:
jobject mWeakThiz;
jclass mClazz;
};
JNISurfaceTextureContext::JNISurfaceTextureContext(JNIEnv* env,
jobject weakThiz, jclass clazz) :
mWeakThiz(env->NewGlobalRef(weakThiz)),
mClazz((jclass)env->NewGlobalRef(clazz))
{}
JNISurfaceTextureContext::~JNISurfaceTextureContext()
{
JNIEnv *env = AndroidRuntime::getJNIEnv();
env->DeleteGlobalRef(mWeakThiz);
env->DeleteGlobalRef(mClazz);
}
void JNISurfaceTextureContext::onFrameAvailable()
{
JNIEnv *env = AndroidRuntime::getJNIEnv();
env->CallStaticVoidMethod(mClazz, fields.postEvent, mWeakThiz);
}
// ----------------------------------------------------------------------------
static void SurfaceTexture_classInit(JNIEnv* env, jclass clazz)
{
fields.surfaceTexture = env->GetFieldID(clazz,
ANDROID_GRAPHICS_SURFACETEXTURE_JNI_ID, "I");
if (fields.surfaceTexture == NULL) {
LOGE("can't find android/graphics/SurfaceTexture.%s",
ANDROID_GRAPHICS_SURFACETEXTURE_JNI_ID);
}
fields.postEvent = env->GetStaticMethodID(clazz, "postEventFromNative",
"(Ljava/lang/Object;)V");
if (fields.postEvent == NULL) {
LOGE("can't find android/graphics/SurfaceTexture.postEventFromNative");
}
}
static void SurfaceTexture_init(JNIEnv* env, jobject thiz, jint texName,
jobject weakThiz)
{
sp<SurfaceTexture> surfaceTexture(new SurfaceTexture(texName));
if (surfaceTexture == 0) {
jniThrowException(env, OutOfResourcesException,
"Unable to create native SurfaceTexture");
return;
}
SurfaceTexture_setSurfaceTexture(env, thiz, surfaceTexture);
jclass clazz = env->GetObjectClass(thiz);
if (clazz == NULL) {
jniThrowRuntimeException(env,
"Can't find android/graphics/SurfaceTexture");
return;
}
sp<JNISurfaceTextureContext> ctx(new JNISurfaceTextureContext(env, weakThiz,
clazz));
surfaceTexture->setFrameAvailableListener(ctx);
}
static void SurfaceTexture_finalize(JNIEnv* env, jobject thiz)
{
sp<SurfaceTexture> surfaceTexture(SurfaceTexture_getSurfaceTexture(env, thiz));
surfaceTexture->setFrameAvailableListener(0);
SurfaceTexture_setSurfaceTexture(env, thiz, 0);
}
static void SurfaceTexture_updateTexImage(JNIEnv* env, jobject thiz)
{
sp<SurfaceTexture> surfaceTexture(SurfaceTexture_getSurfaceTexture(env, thiz));
surfaceTexture->updateTexImage();
}
static void SurfaceTexture_getTransformMatrix(JNIEnv* env, jobject thiz,
jfloatArray jmtx)
{
sp<SurfaceTexture> surfaceTexture(SurfaceTexture_getSurfaceTexture(env, thiz));
float* mtx = env->GetFloatArrayElements(jmtx, NULL);
surfaceTexture->getTransformMatrix(mtx);
env->ReleaseFloatArrayElements(jmtx, mtx, 0);
}
// ----------------------------------------------------------------------------
const char* const kSurfaceTextureClassPathName = "android/graphics/SurfaceTexture";
static JNINativeMethod gSurfaceTextureMethods[] = {
{"nativeClassInit", "()V", (void*)SurfaceTexture_classInit },
{"nativeInit", "(ILjava/lang/Object;)V", (void*)SurfaceTexture_init },
{"nativeFinalize", "()V", (void*)SurfaceTexture_finalize },
{"nativeUpdateTexImage", "()V", (void*)SurfaceTexture_updateTexImage },
{"nativeGetTransformMatrix", "([F)V", (void*)SurfaceTexture_getTransformMatrix },
};
int register_android_graphics_SurfaceTexture(JNIEnv* env)
{
int err = 0;
err = AndroidRuntime::registerNativeMethods(env, kSurfaceTextureClassPathName,
gSurfaceTextureMethods, NELEM(gSurfaceTextureMethods));
return err;
}
} // namespace android
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