/* Copyright (c) 2012-2013, The Linux Foundataion. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*     * Redistributions of source code must retain the above copyright
*       notice, this list of conditions and the following disclaimer.
*     * Redistributions in binary form must reproduce the above
*       copyright notice, this list of conditions and the following
*       disclaimer in the documentation and/or other materials provided
*       with the distribution.
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*       contributors may be used to endorse or promote products derived
*       from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED "AS IS" AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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*/

#define LOG_TAG "QCamera3Factory"
//#define LOG_NDEBUG 0

#include <stdlib.h>
#include <utils/Log.h>
#include <utils/Errors.h>
#include <hardware/camera3.h>

#include "QCamera3Factory.h"

using namespace android;

namespace qcamera {

QCamera3Factory gQCamera3Factory;

/*===========================================================================
 * FUNCTION   : QCamera3Factory
 *
 * DESCRIPTION: default constructor of QCamera3Factory
 *
 * PARAMETERS : none
 *
 * RETURN     : None
 *==========================================================================*/
QCamera3Factory::QCamera3Factory()
{
    camera_info info;

    mNumOfCameras = get_num_of_cameras();

    //Query camera at this point in order
    //to avoid any delays during subsequent
    //calls to 'getCameraInfo()'
    for (int i = 0 ; i < mNumOfCameras ; i++) {
        getCameraInfo(i, &info);
    }
    //

}

/*===========================================================================
 * FUNCTION   : ~QCamera3Factory
 *
 * DESCRIPTION: deconstructor of QCamera2Factory
 *
 * PARAMETERS : none
 *
 * RETURN     : None
 *==========================================================================*/
QCamera3Factory::~QCamera3Factory()
{
}

/*===========================================================================
 * FUNCTION   : get_number_of_cameras
 *
 * DESCRIPTION: static function to query number of cameras detected
 *
 * PARAMETERS : none
 *
 * RETURN     : number of cameras detected
 *==========================================================================*/
int QCamera3Factory::get_number_of_cameras()
{
    return gQCamera3Factory.getNumberOfCameras();
}

/*===========================================================================
 * FUNCTION   : get_camera_info
 *
 * DESCRIPTION: static function to query camera information with its ID
 *
 * PARAMETERS :
 *   @camera_id : camera ID
 *   @info      : ptr to camera info struct
 *
 * RETURN     : int32_t type of status
 *              NO_ERROR  -- success
 *              none-zero failure code
 *==========================================================================*/
int QCamera3Factory::get_camera_info(int camera_id, struct camera_info *info)
{
    return gQCamera3Factory.getCameraInfo(camera_id, info);
}

/*===========================================================================
 * FUNCTION   : getNumberOfCameras
 *
 * DESCRIPTION: query number of cameras detected
 *
 * PARAMETERS : none
 *
 * RETURN     : number of cameras detected
 *==========================================================================*/
int QCamera3Factory::getNumberOfCameras()
{
    return mNumOfCameras;
}

/*===========================================================================
 * FUNCTION   : getCameraInfo
 *
 * DESCRIPTION: query camera information with its ID
 *
 * PARAMETERS :
 *   @camera_id : camera ID
 *   @info      : ptr to camera info struct
 *
 * RETURN     : int32_t type of status
 *              NO_ERROR  -- success
 *              none-zero failure code
 *==========================================================================*/
int QCamera3Factory::getCameraInfo(int camera_id, struct camera_info *info)
{
    int rc;
    ALOGV("%s: E, camera_id = %d", __func__, camera_id);

    if (!mNumOfCameras || camera_id >= mNumOfCameras || !info ||
        (camera_id < 0)) {
        return -ENODEV;
    }

    rc = QCamera3HardwareInterface::getCamInfo(camera_id, info);
    ALOGV("%s: X", __func__);
    return rc;
}

/*===========================================================================
 * FUNCTION   : cameraDeviceOpen
 *
 * DESCRIPTION: open a camera device with its ID
 *
 * PARAMETERS :
 *   @camera_id : camera ID
 *   @hw_device : ptr to struct storing camera hardware device info
 *
 * RETURN     : int32_t type of status
 *              NO_ERROR  -- success
 *              none-zero failure code
 *==========================================================================*/
int QCamera3Factory::cameraDeviceOpen(int camera_id,
                    struct hw_device_t **hw_device)
{
    int rc = NO_ERROR;
    if (camera_id < 0 || camera_id >= mNumOfCameras)
        return -ENODEV;

    QCamera3HardwareInterface *hw = new QCamera3HardwareInterface(camera_id);
    if (!hw) {
        ALOGE("Allocation of hardware interface failed");
        return NO_MEMORY;
    }
    rc = hw->openCamera(hw_device);
    if (rc != 0) {
        delete hw;
    }
    return rc;
}

/*===========================================================================
 * FUNCTION   : camera_device_open
 *
 * DESCRIPTION: static function to open a camera device by its ID
 *
 * PARAMETERS :
 *   @camera_id : camera ID
 *   @hw_device : ptr to struct storing camera hardware device info
 *
 * RETURN     : int32_t type of status
 *              NO_ERROR  -- success
 *              none-zero failure code
 *==========================================================================*/
int QCamera3Factory::camera_device_open(
    const struct hw_module_t *module, const char *id,
    struct hw_device_t **hw_device)
{
    if (module != &HAL_MODULE_INFO_SYM.common) {
        ALOGE("Invalid module. Trying to open %p, expect %p",
            module, &HAL_MODULE_INFO_SYM.common);
        return INVALID_OPERATION;
    }
    if (!id) {
        ALOGE("Invalid camera id");
        return BAD_VALUE;
    }
    return gQCamera3Factory.cameraDeviceOpen(atoi(id), hw_device);
}

struct hw_module_methods_t QCamera3Factory::mModuleMethods = {
    open: QCamera3Factory::camera_device_open,
};

}; // namespace qcamera