/****************************************************************************
*
*    Copyright (c) 2020 Vivante Corporation
*
*    Permission is hereby granted, free of charge, to any person obtaining a
*    copy of this software and associated documentation files (the "Software"),
*    to deal in the Software without restriction, including without limitation
*    the rights to use, copy, modify, merge, publish, distribute, sublicense,
*    and/or sell copies of the Software, and to permit persons to whom the
*    Software is furnished to do so, subject to the following conditions:
*
*    The above copyright notice and this permission notice shall be included in
*    all copies or substantial portions of the Software.
*
*    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
*    IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
*    FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
*    AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
*    LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
*    FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
*    DEALINGS IN THE SOFTWARE.
*
*****************************************************************************/


#include <string.h>
#include <stdlib.h>

#include "vsi_nn_types.h"
#include "vsi_nn_log.h"
#include "vsi_nn_node.h"
#include "vsi_nn_prv.h"
#include "vsi_nn_ops.h"
#include "vsi_nn_tensor.h"
#include "utils/vsi_nn_util.h"
#include "kernel/vsi_nn_kernel.h"

typedef struct _custom_warp_affine_local_data_t {
    int32_t placeholder;
} custom_warp_affine_local_data_t;

/*
 Declare number of input and output.
 */
#define _INPUT_NUM          (2)
#define _OUTPUT_NUM         (1)

static vsi_status op_compute
    (
    vsi_nn_node_t * self,
    vsi_nn_tensor_t ** inputs,
    vsi_nn_tensor_t ** outputs
    )
{
    vsi_nn_kernel_param_t * param = NULL;
    vsi_nn_custom_warp_affine_param * p;
    p = &(self->nn_param.custom_warp_affine);
    float matrix_shape[6] = { 1.0f, 0.0f, 0.0f, 1.0f, 0.0f, 0.0f};
    param = vsi_nn_kernel_param_create();
    //Unlike OpenCV, we use the coordinate of dst and matrix to calculate the coordinate of src in custom_warp_affine.
    //Therefore, matrix M_ovx in custom_warp_affine is different from matrix M_cv in OpenCV.
    //We get M_ovx by transposing the inverse of M_cv.
    //inv_M = cv2.invertAffineTransform(M_cv); M_ovx=inv_M.transpose(1,0)
    if (p->matrix == NULL)
    {
        p->matrix = matrix_shape;
    }

    vsi_nn_kernel_param_add_const_buffer( param, "matrix", p->matrix, 6 );
    vsi_nn_kernel_param_add_int32( param, "type", p->type);
    vsi_nn_kernel_param_add_int32( param, "rgb_type", p->rgb_type);

    self->n = (vx_node)vsi_nn_kernel_selector( self->graph,
            "custom_warp_affine",
            inputs, 2,
            outputs, 1, param );

    vsi_nn_kernel_param_release( &param );

    return VSI_SUCCESS;
} /* op_compute() */

static vsi_bool op_check
    (
    vsi_nn_node_t * self,
    vsi_nn_tensor_t ** inputs,
    vsi_nn_tensor_t ** outputs
    )
{
    /*TODO: Check tensor shapes. */
    VSI_UNREFERENCED(self);
    VSI_UNREFERENCED(inputs);
    VSI_UNREFERENCED(outputs);
    return TRUE;
} /* op_check() */

static vsi_bool op_setup
    (
    vsi_nn_node_t * self,
    vsi_nn_tensor_t ** inputs,
    vsi_nn_tensor_t ** outputs
    )
{
    if ( VSI_NN_DIM_AUTO == outputs[0]->attr.dim_num )
    {
        uint32_t i = 0;

        outputs[0]->attr.dim_num = inputs[0]->attr.dim_num;
        outputs[0]->attr.size[0] = self->nn_param.custom_warp_affine.size[0];
        outputs[0]->attr.size[1] = self->nn_param.custom_warp_affine.size[1];

        for (i = 2; i < outputs[0]->attr.dim_num; i++)
        {
            outputs[0]->attr.size[i] = inputs[0]->attr.size[i];
        }
    }

    return TRUE;
} /* op_setup() */

static vsi_status op_deinit
    (
    vsi_nn_node_t* self
    )
{
    vsi_status status = VSI_SUCCESS;

    status = vsi_nn_op_common_deinit(self);

    return status;
} /* op_deinit() */

__BEGIN_DECLS

/* Registrar */
DEF_OP_REG
    (
    /* op_name    */ CUSTOM_WARP_AFFINE,
    /* init       */ NULL,
    /* compute    */ op_compute,
    /* deinit     */ op_deinit,
    /* check      */ op_check,
    /* setup      */ op_setup,
    /* optimize   */ NULL,
    /* input_num  */ _INPUT_NUM,
    /* output_num */ _OUTPUT_NUM
    );

__END_DECLS
