/*
 * Copyright (C) 2008 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 APK_VERSION	"V1.3"
#define LOG_TAG "HdmiInput-navtive"
//#define LOG_NDEBUG 0

#include <utils/Log.h>
#include <jni.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <utils/Log.h>
#include <unistd.h>
#include <fcntl.h>
#include <errno.h>
#include <sys/ioctl.h>
#include <sys/mman.h>
#include <linux/videodev2.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <linux/v4l2-subdev.h>

#define LOGE(msg,...)   ALOGE("%s(%d): " msg ,__FUNCTION__,__LINE__,##__VA_ARGS__)
#define LOGD(msg,...)   ALOGD("%s(%d): " msg ,__FUNCTION__,__LINE__,##__VA_ARGS__)
#define LOGV(msg,...)   ALOGV("%s(%d): " msg ,__FUNCTION__,__LINE__,##__VA_ARGS__)


static int camFd;
static void getDeviceFormat(int *format)
{
    struct v4l2_control control;
    memset(&control, 0, sizeof(struct v4l2_control));
    control.id = V4L2_CID_DV_RX_POWER_PRESENT;
    int err = ioctl(camFd, VIDIOC_G_CTRL, &control);
    if (err < 0) {
        LOGV("Set POWER_PRESENT failed ,%d(%s)", errno, strerror(errno));
    }

    unsigned int noSignalAndSync = 0;
    ioctl(camFd, VIDIOC_G_INPUT, &noSignalAndSync);
    LOGV("noSignalAndSync ? %s",noSignalAndSync?"YES":"NO");

    struct v4l2_dv_timings dv_timings;
    memset(&dv_timings, 0 ,sizeof(struct v4l2_dv_timings));
    err = ioctl(camFd, VIDIOC_SUBDEV_QUERY_DV_TIMINGS, &dv_timings);
    if (err < 0) {
        LOGV("Set VIDIOC_SUBDEV_QUERY_DV_TIMINGS failed ,%d(%s)", errno, strerror(errno));
    }

    format[0] = dv_timings.bt.width;
    format[1] = dv_timings.bt.height;
    format[2] = control.value && !noSignalAndSync;
}

static jintArray getFormat(JNIEnv *env, jobject thiz)
{
    (void)thiz;
    jintArray array = env->NewIntArray(3);
    jint *result = new jint[3];
    getDeviceFormat(result);
    env->SetIntArrayRegion(array, 0, 3, result);
    delete[] result;
    return array;
}

static void openDevice(JNIEnv *env, jobject thiz)
{
    (void)*env;
    (void)thiz;

    char video_name[64];
    memset(video_name, 0, sizeof(video_name));
    strcat(video_name, "/dev/v4l-subdev2");

    camFd = open(video_name, O_RDWR);
    if (camFd < 0) {
        LOGE("open %s failed,erro=%s",video_name,strerror(errno));
    } else {
        LOGD("open %s success,fd=%d",video_name,camFd);
    }
}

static void closeDevice(JNIEnv *env, jobject thiz)
{
    (void)*env;
    (void)thiz;
    LOGD("close device");
    if(camFd > 0) {
        close(camFd);
    }
}

static const char *classPathName = "com/android/rockchip/camera2/util/JniCameraCall";

static JNINativeMethod methods[] = {
    {"getFormat", "()[I", (void *)getFormat},
    {"openDevice", "()V", (void *)openDevice},
    {"closeDevice", "()V", (void *)closeDevice},
};

/*
 * Register several native methods for one class.
 */
static int registerNativeMethods(JNIEnv *env, const char *className,
                                JNINativeMethod *gMethods, int numMethods)
{
    jclass clazz;

    clazz = env->FindClass(className);
    if (clazz == NULL)
    {
        ALOGE("Native registration unable to find class '%s'", className);
        return JNI_FALSE;
    }
    if (env->RegisterNatives(clazz, gMethods, numMethods) < 0)
    {
        ALOGE("RegisterNatives failed for '%s'", className);
        return JNI_FALSE;
    }

    return JNI_TRUE;
}

/*
 * Register native methods for all classes we know about.
 *
 * returns JNI_TRUE on success.
 */
static int registerNatives(JNIEnv *env)
{
    if (!registerNativeMethods(env, classPathName,
            methods, sizeof(methods) / sizeof(methods[0])))
    {
        return JNI_FALSE;
    }

    return JNI_TRUE;
}

// ----------------------------------------------------------------------------

/*
 * This is called by the VM when the shared library is first loaded.
 */

typedef union {
    JNIEnv *env;
    void *venv;
} UnionJNIEnvToVoid;

jint JNI_OnLoad(JavaVM *vm, void *reserved)
{
    (void)reserved;
    UnionJNIEnvToVoid uenv;
    uenv.venv = NULL;
    jint result = -1;
    JNIEnv *env = NULL;

    ALOGI("JNI_OnLoad");
    ALOGI("Apk Version: %s", APK_VERSION);

    if (vm->GetEnv(&uenv.venv, JNI_VERSION_1_4) != JNI_OK)
    {
        ALOGE("ERROR: GetEnv failed");
        goto bail;
    }
    env = uenv.env;

    if (registerNatives(env) != JNI_TRUE)
    {
        ALOGE("ERROR: registerNatives failed");
        goto bail;
    }

    result = JNI_VERSION_1_4;

bail:
    return result;
}