// 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 TESSERACT_OPENCL_OPENCLWRAPPER_H_
#define TESSERACT_OPENCL_OPENCLWRAPPER_H_

#include <stdio.h>
#include "allheaders.h"
#include "pix.h"
#include "tprintf.h"

// including CL/cl.h doesn't occur until USE_OPENCL defined below

// platform preprocessor commands
#if defined(WIN32) || defined(__WIN32__) || defined(_WIN32) || \
    defined(__CYGWIN__) || defined(__MINGW32__)
#define ON_WINDOWS 1
#define ON_LINUX   0
#define ON_APPLE   0
#define ON_OTHER   0
#define IF_WINDOWS(X) X
#define IF_LINUX(X)
#define IF_APPLE(X)
#define IF_OTHER(X)
#define NOT_WINDOWS(X)
#elif defined( __linux__ )
#define ON_WINDOWS 0
#define ON_LINUX   1
#define ON_APPLE   0
#define ON_OTHER   0
#define IF_WINDOWS(X)
#define IF_LINUX(X) X
#define IF_APPLE(X)
#define IF_OTHER(X)
#define NOT_WINDOWS(X) X
#elif defined( __APPLE__ )
#define ON_WINDOWS 0
#define ON_LINUX   0
#define ON_APPLE   1
#define ON_OTHER   0
#define IF_WINDOWS(X)
#define IF_LINUX(X)
#define IF_APPLE(X) X
#define IF_OTHER(X)
#define NOT_WINDOWS(X) X
#else
#define ON_WINDOWS 0
#define ON_LINUX   0
#define ON_APPLE   0
#define ON_OTHER   1
#define IF_WINDOWS(X)
#define IF_LINUX(X)
#define IF_APPLE(X)
#define IF_OTHER(X) X
#define NOT_WINDOWS(X) X
#endif

#if ON_LINUX
#include <time.h>
#endif

/************************************************************************************
 * enable/disable reporting of performance
 * PERF_REPORT_LEVEL
 * 0 - no reporting
 * 1 - no reporting
 * 2 - report total function call time for functions we're tracking
 * 3 - optionally report breakdown of function calls (kernel launch, kernel time, data copies)
 ************************************************************************************/
#define PERF_COUNT_VERBOSE 1
#define PERF_COUNT_REPORT_STR "[%36s], %24s, %11.6f\n"


#if ON_WINDOWS

#if PERF_COUNT_VERBOSE >= 2
#define PERF_COUNT_START(FUNCT_NAME) \
    char *funct_name = FUNCT_NAME; \
    double elapsed_time_sec; \
    LARGE_INTEGER freq, time_funct_start, time_funct_end, time_sub_start, time_sub_end; \
    QueryPerformanceFrequency(&freq); \
    QueryPerformanceCounter(&time_funct_start); \
    time_sub_start = time_funct_start; \
    time_sub_end = time_funct_start;

#define PERF_COUNT_END                                                       \
  QueryPerformanceCounter(&time_funct_end);                                  \
  elapsed_time_sec = (time_funct_end.QuadPart - time_funct_start.QuadPart) / \
                     (double)(freq.QuadPart);                                \
  printf(PERF_COUNT_REPORT_STR, funct_name, "total", elapsed_time_sec);
#else
#define PERF_COUNT_START(FUNCT_NAME)
#define PERF_COUNT_END
#endif

#if PERF_COUNT_VERBOSE >= 3
#define PERF_COUNT_SUB(SUB)                                              \
  QueryPerformanceCounter(&time_sub_end);                                \
  elapsed_time_sec = (time_sub_end.QuadPart - time_sub_start.QuadPart) / \
                     (double)(freq.QuadPart);                            \
  printf(PERF_COUNT_REPORT_STR, funct_name, SUB, elapsed_time_sec);      \
  time_sub_start = time_sub_end;
#else
#define PERF_COUNT_SUB(SUB)
#endif


// not on windows
#else

#if PERF_COUNT_VERBOSE >= 2
#define PERF_COUNT_START(FUNCT_NAME) \
    char *funct_name = FUNCT_NAME; \
    double elapsed_time_sec; \
    timespec time_funct_start, time_funct_end, time_sub_start, time_sub_end; \
    clock_gettime( CLOCK_MONOTONIC, &time_funct_start ); \
    time_sub_start = time_funct_start; \
    time_sub_end = time_funct_start;

#define PERF_COUNT_END                                                    \
  clock_gettime(CLOCK_MONOTONIC, &time_funct_end);                        \
  elapsed_time_sec =                                                      \
      (time_funct_end.tv_sec - time_funct_start.tv_sec) * 1.0 +           \
      (time_funct_end.tv_nsec - time_funct_start.tv_nsec) / 1000000000.0; \
  printf(PERF_COUNT_REPORT_STR, funct_name, "total", elapsed_time_sec);
#else
#define PERF_COUNT_START(FUNCT_NAME)
#define PERF_COUNT_END
#endif

#if PERF_COUNT_VERBOSE >= 3
#define PERF_COUNT_SUB(SUB)                                           \
  clock_gettime(CLOCK_MONOTONIC, &time_sub_end);                      \
  elapsed_time_sec =                                                  \
      (time_sub_end.tv_sec - time_sub_start.tv_sec) * 1.0 +           \
      (time_sub_end.tv_nsec - time_sub_start.tv_nsec) / 1000000000.0; \
  printf(PERF_COUNT_REPORT_STR, funct_name, SUB, elapsed_time_sec);   \
  time_sub_start = time_sub_end;
#else
#define PERF_COUNT_SUB(SUB)
#endif

#endif
/**************************************************************************
 * enable/disable use of OpenCL
 **************************************************************************/

#ifdef USE_OPENCL
#include "opencl_device_selection.h"

#ifndef strcasecmp
#define strcasecmp strcmp
#endif

#define MAX_KERNEL_STRING_LEN 64
#define MAX_CLFILE_NUM 50
#define MAX_CLKERNEL_NUM 200
#define MAX_KERNEL_NAME_LEN 64
#define CL_QUEUE_THREAD_HANDLE_AMD 0x403E
#define GROUPSIZE_X 16
#define GROUPSIZE_Y 16
#define GROUPSIZE_HMORX 256
#define GROUPSIZE_HMORY 1

typedef struct _KernelEnv
{
    cl_context mpkContext;
    cl_command_queue mpkCmdQueue;
    cl_program mpkProgram;
    cl_kernel mpkKernel;
    char mckKernelName[150];
} KernelEnv;

typedef struct _OpenCLEnv
{
    cl_platform_id mpOclPlatformID;
    cl_context mpOclContext;
    cl_device_id mpOclDevsID;
    cl_command_queue mpOclCmdQueue;
} OpenCLEnv;
typedef int ( *cl_kernel_function )( void **userdata, KernelEnv *kenv );

#define CHECK_OPENCL(status,name)    \
if( status != CL_SUCCESS )    \
{    \
    printf ("OpenCL error code is %d at   when %s .\n", status, name);    \
}


typedef struct _GPUEnv
{
    //share vb in all modules in hb library
    cl_platform_id mpPlatformID;
    cl_device_type mDevType;
    cl_context mpContext;
    cl_device_id *mpArryDevsID;
    cl_device_id mpDevID;
    cl_command_queue mpCmdQueue;
    cl_kernel mpArryKernels[MAX_CLFILE_NUM];
    cl_program mpArryPrograms[MAX_CLFILE_NUM]; //one program object maps one kernel source file
    char mArryKnelSrcFile[MAX_CLFILE_NUM][256], //the max len of kernel file name is 256
         mArrykernelNames[MAX_CLKERNEL_NUM][MAX_KERNEL_STRING_LEN + 1];
         cl_kernel_function mpArryKnelFuncs[MAX_CLKERNEL_NUM];
    int mnKernelCount, mnFileCount, // only one kernel file
        mnIsUserCreated; // 1: created , 0:no create and needed to create by opencl wrapper
    int mnKhrFp64Flag;
    int mnAmdFp64Flag;

} GPUEnv;


class OpenclDevice
{

public:
    static GPUEnv gpuEnv;
    static int isInited;
    OpenclDevice();
    ~OpenclDevice();
    static int InitEnv(); // load dll, call InitOpenclRunEnv(0)
    static int InitOpenclRunEnv( int argc ); // RegistOpenclKernel, double flags, compile kernels
    static int InitOpenclRunEnv_DeviceSelection( int argc ); // RegistOpenclKernel, double flags, compile kernels
    static int RegistOpenclKernel();
    static int ReleaseOpenclRunEnv();
    static int ReleaseOpenclEnv( GPUEnv *gpuInfo );
    static int CompileKernelFile( GPUEnv *gpuInfo, const char *buildOption );
    static int CachedOfKernerPrg( const GPUEnv *gpuEnvCached, const char * clFileName );
    static int GeneratBinFromKernelSource( cl_program program, const char * clFileName );
    static int WriteBinaryToFile( const char* fileName, const char* birary, size_t numBytes );
    static int BinaryGenerated( const char * clFileName, FILE ** fhandle );
    //static int CompileKernelFile( const char *filename, GPUEnv *gpuInfo, const char *buildOption );
    static l_uint32* pixReadFromTiffKernel(l_uint32 *tiffdata,l_int32 w,l_int32 h,l_int32 wpl, l_uint32 *line);
    static int composeRGBPixelCl(int *tiffdata,int *line,int h,int w);

/* OpenCL implementations of Morphological operations*/

    //Initialiation of OCL buffers used in Morph operations
    static int initMorphCLAllocations(l_int32 wpl, l_int32 h, Pix *pixs);
    static void releaseMorphCLBuffers();

    static void pixGetLinesCL(Pix *pixd, Pix *pixs, Pix **pix_vline,
                              Pix **pix_hline, Pix **pixClosed,
                              bool getpixClosed, l_int32 close_hsize,
                              l_int32 close_vsize, l_int32 open_hsize,
                              l_int32 open_vsize, l_int32 line_hsize,
                              l_int32 line_vsize);

    //int InitOpenclAttr( OpenCLEnv * env );
    //int ReleaseKernel( KernelEnv * env );
    static int SetKernelEnv( KernelEnv *envInfo );
    //int CreateKernel( char * kernelname, KernelEnv * env );
    //int RunKernel( const char *kernelName, void **userdata );
    //int ConvertToString( const char *filename, char **source );
    //int CheckKernelName( KernelEnv *envInfo, const char *kernelName );
    //int RegisterKernelWrapper( const char *kernelName, cl_kernel_function function );
    //int RunKernelWrapper( cl_kernel_function function, const char * kernelName, void **usrdata );
    //int GetKernelEnvAndFunc( const char *kernelName, KernelEnv *env, cl_kernel_function *function );

    static int LoadOpencl();
#ifdef WIN32
    //static int OpenclInite();
    static void FreeOpenclDll();
#endif

    inline static int AddKernelConfig( int kCount, const char *kName );

    /* for binarization */
    static int HistogramRectOCL(unsigned char *imagedata, int bytes_per_pixel,
                                int bytes_per_line, int left, int top,
                                int width, int height, int kHistogramSize,
                                int *histogramAllChannels);

    static int ThresholdRectToPixOCL(unsigned char *imagedata,
                                     int bytes_per_pixel, int bytes_per_line,
                                     int *thresholds, int *hi_values, Pix **pix,
                                     int rect_height, int rect_width,
                                     int rect_top, int rect_left);

    static ds_device getDeviceSelection();
    static ds_device selectedDevice;
    static bool deviceIsSelected;
    static bool selectedDeviceIsOpenCL();
};

#endif  // USE_OPENCL
#endif  // TESSERACT_OPENCL_OPENCLWRAPPER_H_
