Merge "Create MediaTuner Java class and JNI"

/*

 * Copyright 2019 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.

 */

package android.media.tv.tuner;

/**

 * Tuner is used to interact with tuner devices.

 *

 * @hide

 */

public final class Tuner implements AutoCloseable  {

    private static final String TAG = "MediaTvTuner";

    private static final boolean DEBUG = false;

    static {

        System.loadLibrary("media_tv_tuner");

        nativeInit();

    }

    public Tuner() {

        nativeSetup();

    }

    private long mNativeContext; // used by native jMediaTuner

    @Override

    public void close() {}

    /**

     * Native Initialization.

     */

    private static native void nativeInit();

    /**

     * Native setup.

     */

    private native void nativeSetup();

}

    ],

}

cc_library_shared {

    name: "libmedia_tv_tuner",

    srcs: [

        "android_media_tv_Tuner.cpp",

    ],

    shared_libs: [

        "android.hardware.tv.tuner@1.0",

        "libandroid_runtime",

        "liblog",

        "libutils",

    ],

    export_include_dirs: ["."],

    cflags: [

        "-Wall",

        "-Werror",

        "-Wno-error=deprecated-declarations",

        "-Wunused",

        "-Wunreachable-code",

    ],

}

subdirs = [

    "audioeffect",

    "soundpool",

/*

 * Copyright 2019 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 "TvTuner-JNI"

#include <utils/Log.h>

#include "android_media_tv_Tuner.h"

#include "android_runtime/AndroidRuntime.h"

#include <android/hardware/tv/tuner/1.0/ITuner.h>

#include <media/stagefright/foundation/ADebug.h>

#pragma GCC diagnostic ignored "-Wunused-function"

using ::android::hardware::tv::tuner::V1_0::ITuner;

struct fields_t {

    jfieldID context;

};

static fields_t gFields;

namespace android {

sp<ITuner> JTuner::mTuner;

JTuner::JTuner(JNIEnv *env, jobject thiz)

    : mClass(NULL) {

    jclass clazz = env->GetObjectClass(thiz);

    CHECK(clazz != NULL);

    mClass = (jclass)env->NewGlobalRef(clazz);

    mObject = env->NewWeakGlobalRef(thiz);

    if (mTuner == NULL) {

        mTuner = getTunerService();

    }

}

JTuner::~JTuner() {

    JNIEnv *env = AndroidRuntime::getJNIEnv();

    env->DeleteGlobalRef(mClass);

    mTuner = NULL;

    mClass = NULL;

    mObject = NULL;

}

sp<ITuner> JTuner::getTunerService() {

    if (mTuner == nullptr) {

        mTuner = ITuner::getService();

        if (mTuner == nullptr) {

            ALOGW("Failed to get tuner service.");

        }

    }

    return mTuner;

}

}  // namespace android

////////////////////////////////////////////////////////////////////////////////

using namespace android;

static sp<JTuner> setTuner(JNIEnv *env, jobject thiz, const sp<JTuner> &tuner) {

    sp<JTuner> old = (JTuner *)env->GetLongField(thiz, gFields.context);

    if (tuner != NULL) {

        tuner->incStrong(thiz);

    }

    if (old != NULL) {

        old->decStrong(thiz);

    }

    env->SetLongField(thiz, gFields.context, (jlong)tuner.get());

    return old;

}

static sp<JTuner> getTuner(JNIEnv *env, jobject thiz) {

    return (JTuner *)env->GetLongField(thiz, gFields.context);

}

static void android_media_tv_Tuner_native_init(JNIEnv *env) {

    jclass clazz = env->FindClass("android/media/tv/tuner/Tuner");

    CHECK(clazz != NULL);

    gFields.context = env->GetFieldID(clazz, "mNativeContext", "J");

    CHECK(gFields.context != NULL);

}

static void android_media_tv_Tuner_native_setup(JNIEnv *env, jobject thiz) {

    sp<JTuner> tuner = new JTuner(env, thiz);

    setTuner(env,thiz, tuner);

}

static const JNINativeMethod gMethods[] = {

    { "nativeInit", "()V", (void *)android_media_tv_Tuner_native_init },

    { "nativeSetup", "()V", (void *)android_media_tv_Tuner_native_setup },

};

static int register_android_media_tv_Tuner(JNIEnv *env) {

    return AndroidRuntime::registerNativeMethods(

            env, "android/media/tv/tuner/Tuner", gMethods, NELEM(gMethods));

}

jint JNI_OnLoad(JavaVM* vm, void* /* reserved */)

{

    JNIEnv* env = NULL;

    jint result = -1;

    if (vm->GetEnv((void**) &env, JNI_VERSION_1_4) != JNI_OK) {

        ALOGE("ERROR: GetEnv failed\n");

        return result;

    }

    assert(env != NULL);

    if (register_android_media_tv_Tuner(env) != JNI_OK) {

        ALOGE("ERROR: Tuner native registration failed\n");

        return result;

    }

    return JNI_VERSION_1_4;

}

/*

 * Copyright 2019 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.

 */

#ifndef _ANDROID_MEDIA_TV_TUNER_H_

#define _ANDROID_MEDIA_TV_TUNER_H_

#include <android/hardware/tv/tuner/1.0/ITuner.h>

#include <utils/RefBase.h>

#include "jni.h"

using ::android::hardware::tv::tuner::V1_0::ITuner;

namespace android {

struct JTuner : public RefBase {

    JTuner(JNIEnv *env, jobject thiz);

    sp<ITuner> getTunerService();

protected:

    virtual ~JTuner();

private:

    jclass mClass;

    jweak mObject;

    static sp<ITuner> mTuner;

};

}  // namespace android

#endif  // _ANDROID_MEDIA_TV_TUNER_H_