Small optimizations to load_mb/save_mb and all_edges normal filter.

#pragma OPENCL EXTENSION cl_khr_byte_addressable_store : enable
#pragma OPENCL EXTENSION cl_amd_printf : enable

typedef unsigned char uc;
typedef signed char sc;

__inline signed char vp8_filter_mask_mem(uc, uc, uchar*);
__inline signed char vp8_filter_mask(uc, uc, uchar8);

__inline char vp8_hevmask_mem(uchar, uchar*);
__inline char vp8_hevmask(uchar, uchar4);

__inline void vp8_filter_mem( signed char mask, uchar hev, uchar *base);

__inline signed char vp8_simple_filter_mask(uc, uc, uc, uc, uc);

__inline uchar8 vp8_mbfilter(signed char mask, uchar hev, uchar8);

__inline void vp8_simple_filter(signed char mask,global uc *base, int op1_off,int op0_off,int oq0_off,int oq1_off);

constant size_t threads[3] = {16, 8, 8};

#ifndef __CL_VERSION_1_0__
#define __CL_VERSION_1_0__ 100
#endif

#if !defined(__OPENCL_VERSION__) || (__OPENCL_VERSION__ == __CL_VERSION_1_0__)
#define clamp(x,y,z) vp8_char_clamp(x)
char vp8_char_clamp(int in){
    return max(min(in, 127), -128);
}
#endif

typedef struct
{
    unsigned char mblim[MAX_LOOP_FILTER + 1][SIMD_WIDTH];
    unsigned char blim[MAX_LOOP_FILTER + 1][SIMD_WIDTH];
    unsigned char lim[MAX_LOOP_FILTER + 1][SIMD_WIDTH];
    unsigned char hev_thr[4][SIMD_WIDTH];
    unsigned char lvl[4][4][4];
    unsigned char hev_thr_lut[2][MAX_LOOP_FILTER + 1];
    unsigned char mode_lf_lut[10];
} loop_filter_info_n __attribute__ ((aligned(SIMD_WIDTH)));

typedef struct
{
    unsigned char mblim;
    unsigned char blim;
    unsigned char lim;
    unsigned char hev_thr;
} loop_filter_info;

__inline void set_lfi(global loop_filter_info_n *lfi_n, local loop_filter_info *lfi, int frame_type, int filter_level);

__inline void vp8_filter_mem(
    signed char mask,
    uchar hev,
    uchar *base
)
{

    char *pq = (char*)base;
    pq[0] ^= 0x80;
    pq[1] ^= 0x80;
    pq[2] ^= 0x80;
    pq[3] ^= 0x80;

    char vp8_filter;
    char2 Filter;
    char4 u;

    /* add outer taps if we have high edge variance */
    vp8_filter = sub_sat(pq[0], pq[3]);
    vp8_filter &= hev;

    /* inner taps */
    vp8_filter = clamp(vp8_filter + 3 * (pq[2] - pq[1]), -128, 127);
    vp8_filter &= mask;

    /* save bottom 3 bits so that we round one side +4 and the other +3
     * if it equals 4 we'll set to adjust by -1 to account for the fact
     * we'd round 3 the other way
     */
    char2 rounding = {4,3};
    Filter = add_sat((char2)vp8_filter, rounding);
    Filter.s0 >>= 3;
    Filter.s1 >>= 3;

    /* outer tap adjustments */
    vp8_filter = Filter.s0 + 1;
    vp8_filter >>= 1;
    vp8_filter &= ~hev;

    u.s0 = add_sat(pq[0], vp8_filter);
    u.s1 = add_sat(pq[1], Filter.s1);
    u.s2 = sub_sat(pq[2], Filter.s0);
    u.s3 = sub_sat(pq[3], vp8_filter);

    pq[0] = u.s0 ^ 0x80;
    pq[1] = u.s1 ^ 0x80;
    pq[2] = u.s2 ^ 0x80;
    pq[3] = u.s3 ^ 0x80;

}

__inline uchar4 vp8_filter(
    signed char mask,
    uchar hev,
    uchar4 base
)
{
    char4 pq = as_char4(base) ^ (char4)0x80;

    char vp8_filter;
    char2 Filter;
    char4 u;

    /* add outer taps if we have high edge variance */
    vp8_filter = sub_sat(pq.s0, pq.s3);
    vp8_filter &= hev;

    /* inner taps */
    vp8_filter = clamp(vp8_filter + 3 * (pq.s2 - pq.s1), -128, 127);
    vp8_filter &= mask;

    /* save bottom 3 bits so that we round one side +4 and the other +3
     * if it equals 4 we'll set to adjust by -1 to account for the fact
     * we'd round 3 the other way
     */
    char2 rounding = {4,3};
    Filter = add_sat((char2)vp8_filter, rounding);
    Filter.s0 >>= 3;
    Filter.s1 >>= 3;

    /* outer tap adjustments */
    vp8_filter = Filter.s0 + 1;
    vp8_filter >>= 1;
    vp8_filter &= ~hev;

    u.s0 = add_sat(pq.s0, vp8_filter);
    u.s1 = add_sat(pq.s1, Filter.s1);
    u.s2 = sub_sat(pq.s2, Filter.s0);
    u.s3 = sub_sat(pq.s3, vp8_filter);

    return as_uchar4(u ^ (char4)0x80);

}

__inline uchar8 load8(global unsigned char *s_base, int s_off, int p){
    uchar8 data;
    data.s0 = s_base[s_off-4*p];
    data.s1 = s_base[s_off-3*p];
    data.s2 = s_base[s_off-2*p];
    data.s3 = s_base[s_off-p];
    data.s4 = s_base[s_off];
    data.s5 = s_base[s_off+p];
    data.s6 = s_base[s_off+2*p];
    data.s7 = s_base[s_off+3*p];
    return data;
}

__inline uchar8 load8_local(local unsigned char *s_base, int s_off, int p){
    uchar8 data;
    data.s0 = s_base[s_off-4*p];
    data.s1 = s_base[s_off-3*p];
    data.s2 = s_base[s_off-2*p];
    data.s3 = s_base[s_off-p];
    data.s4 = s_base[s_off];
    data.s5 = s_base[s_off+p];
    data.s6 = s_base[s_off+2*p];
    data.s7 = s_base[s_off+3*p];
    return data;
}

__inline void save4(global unsigned char *s_base, int s_off, int p, uchar8 data){
    s_base[s_off - 2*p] = data.s2;
    s_base[s_off - p  ] = data.s3;
    s_base[s_off      ] = data.s4;
    s_base[s_off + p  ] = data.s5;
}

__inline void save4_local(local unsigned char *s_base, int s_off, int p, uchar8 data){
    s_base[s_off - 2*p] = data.s2;
    s_base[s_off - p  ] = data.s3;
    s_base[s_off      ] = data.s4;
    s_base[s_off + p  ] = data.s5;
}

__inline void save6(global unsigned char *s_base, int s_off, int p, uchar8 data){
    s_base[s_off - 3*p] = data.s1;
    s_base[s_off - 2*p] = data.s2;
    s_base[s_off - p  ] = data.s3;
    s_base[s_off      ] = data.s4;
    s_base[s_off + p  ] = data.s5;
    s_base[s_off + 2*p  ] = data.s6;
}

__inline void save6_local(local unsigned char *s_base, int s_off, int p, uchar8 data){
    s_base[s_off - 3*p] = data.s1;
    s_base[s_off - 2*p] = data.s2;
    s_base[s_off - p  ] = data.s3;
    s_base[s_off      ] = data.s4;
    s_base[s_off + p  ] = data.s5;
    s_base[s_off + 2*p  ] = data.s6;
}

__inline uchar16 load16(global unsigned char *s_base, int s_off, int p){
    uchar16 data;
    data.s01234567 = load8(s_base, s_off, p);
    data.s89abcdef = load8(s_base, s_off+8*p, p);
    return data;
}

__inline void save12(global unsigned char *s_base, int s_off, int p, uchar16 data){
    s_base[s_off - 2*p] = data.s2;
    s_base[s_off - p  ] = data.s3;
    s_base[s_off      ] = data.s4;
    s_base[s_off + p  ] = data.s5;
    s_base[s_off + 2*p] = data.s6;
    s_base[s_off + 3*p] = data.s7;
    s_base[s_off + 4*p] = data.s8;
    s_base[s_off + 5*p] = data.s9;
    s_base[s_off + 6*p] = data.sa;
    s_base[s_off + 7*p] = data.sb;
    s_base[s_off + 8*p] = data.sc;
    s_base[s_off + 9*p] = data.sd;
}

// Filters horizontal edges of inner blocks in a Macroblock
__inline void vp8_loop_filter_horizontal_edge_worker(
    global uchar *s_base,
    int source_offset,
    global int *pitches, /* pitch */
    local loop_filter_info *lfi,
    global int *filters,
    int dc_diffs,
    int filter_level,
    int cur_iter,
    size_t num_blocks,
    size_t num_planes,
    size_t thread,
    size_t plane,
    size_t block,
    int p //pitches[plane]
){
    uchar8 data;
    if (dc_diffs > 0){
        int s_off = source_offset + 4*cur_iter*p; //Move down 4 lines per iter
        s_off += thread; //Move to the right part of the horizontal line

        data = load8(s_base, s_off, p);

        char mask = vp8_filter_mask(lfi->lim, lfi->blim, data);

        char hev = vp8_hevmask(lfi->hev_thr, data.s2345);

        data.s2345 = vp8_filter(mask, hev, data.s2345);

        save4(s_base, s_off, p, data);
    }
}

// Filters horizontal edges of inner blocks in a Macroblock
__inline void vp8_loop_filter_horizontal_edge_worker_local(
    local uchar *s_base,
    int source_offset,
    global int *pitches, /* pitch */
    local loop_filter_info *lfi,
    global int *filters,
    int dc_diffs,
    int filter_level,
    int cur_iter,
    size_t num_blocks,
    size_t num_planes,
    size_t thread,
    size_t plane,
    size_t block,
    int p //pitches[plane]
){
    uchar8 data;
    if (dc_diffs > 0){
        int s_off = source_offset + 4*cur_iter*p; //Move down 4 lines per iter
        s_off += thread; //Move to the right part of the horizontal line

        data = load8_local(s_base, s_off, p);

        char mask = vp8_filter_mask(lfi->lim, lfi->blim, data);

        char hev = vp8_hevmask(lfi->hev_thr, data.s2345);

        data.s2345 = vp8_filter(mask, hev, data.s2345);

        save4_local(s_base, s_off, p, data);
    }
}

__inline void vp8_loop_filter_vertical_edge_worker(
    global uchar *s_base,
    int source_offset,
    local loop_filter_info *lfi,
    int dc_diffs,
    int cur_iter,
    size_t thread,
    int p
){
    uchar8 data;
    if (dc_diffs > 0){
        int s_off = source_offset + 4*cur_iter; //Move right 4 cols per iter
        s_off += thread * p; //Move down to the right part of the vertical line

        data = load8(s_base, s_off, 1);

        char mask = vp8_filter_mask(lfi->lim, lfi->blim, data);

        int hev = vp8_hevmask(lfi->hev_thr, data.s2345);

        data.s2345 = vp8_filter(mask, hev, data.s2345);
        save4(s_base, s_off, 1, data);
    }
}

__inline void vp8_loop_filter_vertical_edge_worker_local(
    local uchar *s_base,
    int source_offset,
    local loop_filter_info *lfi,
    int dc_diffs,
    int cur_iter,
    size_t thread,
    int p
){
    uchar8 data;
    if (dc_diffs > 0){
        int s_off = source_offset + 4*cur_iter; //Move right 4 cols per iter
        s_off += thread * p; //Move down to the right part of the vertical line

        data = load8_local(s_base, s_off, 1);

        char mask = vp8_filter_mask(lfi->lim, lfi->blim, data);

        int hev = vp8_hevmask(lfi->hev_thr, data.s2345);

        data.s2345 = vp8_filter(mask, hev, data.s2345);
        save4_local(s_base, s_off, 1, data);
    }
}

__inline void vp8_mbloop_filter_horizontal_edge_worker(
    global unsigned char *s_base,
    int source_offset,
    local loop_filter_info *lfi,
    size_t thread,
    int p //pitches[plane]
){

    int s_off = source_offset + thread;

    uchar8 data = load8(s_base, s_off, p);

    char mask = vp8_filter_mask(lfi->lim, lfi->mblim, data);

    char hev = vp8_hevmask(lfi->hev_thr, data.s2345);

    data = vp8_mbfilter(mask, hev, data);

    save6(s_base, s_off, p, data);

}

__inline void vp8_mbloop_filter_horizontal_edge_worker_local(
    local unsigned char *s_base,
    int source_offset,
    local loop_filter_info *lfi,
    size_t thread,
    int p //pitches[plane]
){

    int s_off = source_offset + thread;

    uchar8 data = load8_local(s_base, s_off, p);

    char mask = vp8_filter_mask(lfi->lim, lfi->mblim, data);

    char hev = vp8_hevmask(lfi->hev_thr, data.s2345);

    data = vp8_mbfilter(mask, hev, data);

    save6_local(s_base, s_off, p, data);

}

__inline void vp8_mbloop_filter_vertical_edge_worker(
    global unsigned char *s_base,
    int source_offset,
    local loop_filter_info *lfi,
    size_t thread,
    int p //pitches[plane]
){

    int s_off = source_offset + p*thread;

    uchar8 data = load8(s_base, s_off, 1);

    char mask = vp8_filter_mask(lfi->lim, lfi->mblim, data);

    int hev = vp8_hevmask(lfi->hev_thr, data.s2345);

    data = vp8_mbfilter(mask, hev, data);

    save6(s_base, s_off, 1, data);
}

__inline void vp8_mbloop_filter_vertical_edge_worker_local(
    local unsigned char *s_base,
    int source_offset,
    local loop_filter_info *lfi,
    size_t thread,
    int p //threads[plane]+4
){

    int s_off = source_offset + p*thread;

    uchar8 data = load8_local(s_base, s_off, 1);

    char mask = vp8_filter_mask(lfi->lim, lfi->mblim, data);

    int hev = vp8_hevmask(lfi->hev_thr, data.s2345);

    data = vp8_mbfilter(mask, hev, data);

    save6_local(s_base, s_off, 1, data);
}

//Assumes a work group size of 1 plane
__inline void load_mb(int size, local uchar *dst, global uchar *src, int src_off, int src_pitch, int mb_row, int mb_col, int dc_diffs, int thread){
    //Load 4 row top border if row != 0, starting at row 0, col 4
    int dst_pitch = size + 4;
    int row_start, row_end, col_start, col_end;

    if (dc_diffs > 0){
        row_end = 0;
        col_end = size;
    } else {
        row_end = 4;
        col_end = 4;
    }

    row_start = -4;

    //Load 4 col left border if col != 0, otherwise just the pixels of block data
    if (mb_col > 0){
        col_start = -4;
    } else {
        col_start = 0;
    }

    if (mb_row > 0){
        for (int i = row_start; i < row_end; i++){
                dst[i*dst_pitch + thread] = src[i*src_pitch + src_off + thread];
        }
    }

    //Load 16x16 or 8x8 pixels of Macroblock data with destination starting at
    //row 4, col 4.
    for (int i = col_start; i < col_end; i++){
        dst[thread*dst_pitch + i] = src[thread*src_pitch + src_off + i];
    }
}

__inline void save_mb(int size, local uchar *src, global uchar *dst, int dst_off, int dst_pitch, int mb_row, int mb_col, int dc_diffs, int thread){
    //Load 4 row top border if row != 0, starting at row 0, col 4
    int src_pitch = size + 4;
    int row_start, row_end, col_start, col_end;

    if (dc_diffs > 0){
        row_end = 0;
        col_end = size;
    } else {
        row_end = 3;
        col_end = 3;
    }

    row_start = -3;

    //Save 3 col left border if col != 0, otherwise just the pixels of block data
    if (mb_col > 0){
        col_start = -3;
    } else {
        col_start = 0;
    }

    if (mb_row > 0){
        for (int i = row_start; i < row_end; i++){
            dst[i*dst_pitch + dst_off + thread] = src[i*src_pitch + thread];
        }
    }

    //Save 16x16 or 8x8 pixels of Macroblock data with destination starting at
    //row 4, col 4.
    for (int i = col_start; i < col_end; i++){
        dst[thread*dst_pitch + dst_off + i] = src[thread*src_pitch + i];
    }
}

kernel void vp8_loop_filter_all_edges_kernel(
    global unsigned char *s_base,
    global int *offsets_in,
    global int *pitches,
    global loop_filter_info_n *lfi_n,
    global int *filters_in,
    int priority_level,
    int num_levels,
    global int *block_offsets,
    global int *priority_num_blocks,
    int frame_type
){

    size_t block = get_global_id(2);

    int block_offset = block_offsets[priority_level];
    global int *filters = &filters_in[4*block_offset];
    int filter_level = filters[block];
    if ( filter_level <= 0 )
        return;

    size_t thread = get_global_id(0);
    size_t plane = 0;

    //Threads 0-15 are Y plane, 16-23 are U, 24-31 are V.
#if 0
    if (thread > 15){
        plane += thread / 8 - 1;
        thread = thread % 8;
    }
#else
    int new_thread = thread;
    plane = thread / 16;
    new_thread = new_thread - plane * (thread/8 * 8); //If plane==1, new thread = thread%8... without branching
    plane += plane * (thread / 8 - 2); //plane = 0/1/2 for Y/U/V
    thread = new_thread;
#endif

    global int *offsets = &offsets_in[3*block_offset];
    size_t num_blocks = priority_num_blocks[priority_level];
    local loop_filter_info lf_info;
    if (get_local_id(0) == 0){ //shared among all local threads, save bandwidth
        set_lfi(lfi_n, &lf_info, frame_type, filter_level);
    }

    int source_offset = offsets[block*3 + plane];

    int p = pitches[plane];

    int mb_col = filters[num_blocks * COLS_LOCATION + block];
    int mb_row = filters[num_blocks * ROWS_LOCATION + block];
    int dc_diffs = filters[num_blocks * DC_DIFFS_LOCATION + block];

#define USE_LOCAL_MEM_FILTER 0
#if USE_LOCAL_MEM_FILTER
    //At the moment this local memory mechanism only works if local number of
    //threads/plane == global number of threads/plane
    local uchar mb_data[1200]; //Local copy of frame data for current plane
    int mb_offset, mb_pitch;

    int local_global_match = (get_local_size(0) == get_global_size(0));

    if ( local_global_match){
        mb_offset = 4+4*(threads[plane]+4) + 400*plane;
        mb_pitch = threads[plane]+4;

        load_mb(threads[plane], &mb_data[mb_offset], s_base, source_offset, p, mb_row, mb_col, dc_diffs, thread);
        write_mem_fence(CLK_LOCAL_MEM_FENCE);

        if ( mb_col > 0 ){
            vp8_mbloop_filter_vertical_edge_worker_local(mb_data, mb_offset, &lf_info, thread, mb_pitch);
        }

        //YUV planes, then 2 more passes of Y plane
        vp8_loop_filter_vertical_edge_worker_local(mb_data, mb_offset, &lf_info,
                dc_diffs, 1, thread, mb_pitch);
        if (plane == 0){
            vp8_loop_filter_vertical_edge_worker_local(mb_data, mb_offset, &lf_info,
                    dc_diffs, 2, thread, mb_pitch);
            vp8_loop_filter_vertical_edge_worker_local(mb_data, mb_offset, &lf_info,
                    dc_diffs, 3, thread, mb_pitch);
        }
    } else {
#endif
        //Load/stores directly out of global memory.
        if ( mb_col > 0 ){
            vp8_mbloop_filter_vertical_edge_worker(s_base, source_offset, &lf_info, thread, p);
        }
        //YUV planes, then 2 more passes of Y plane
        vp8_loop_filter_vertical_edge_worker(s_base, source_offset, &lf_info,
                dc_diffs, 1, thread, p);
        if (plane == 0){
            vp8_loop_filter_vertical_edge_worker(s_base, source_offset, &lf_info,
                    dc_diffs, 2, thread, p);
            vp8_loop_filter_vertical_edge_worker(s_base, source_offset, &lf_info,
                    dc_diffs, 3, thread, p);
        }
        write_mem_fence(CLK_GLOBAL_MEM_FENCE);
#if USE_LOCAL_MEM_FILTER
    }

    if ( local_global_match ){
        if (mb_row > 0){
            vp8_mbloop_filter_horizontal_edge_worker_local(mb_data, mb_offset, &lf_info, thread, mb_pitch);
        }
        //YUV planes, then 2 more passes of Y plane
        vp8_loop_filter_horizontal_edge_worker_local(mb_data, mb_offset, pitches, &lf_info, filters,
                dc_diffs, filter_level, 1, num_blocks, 3, thread, plane, block, mb_pitch);
        if (plane == 0){
            vp8_loop_filter_horizontal_edge_worker_local(mb_data, mb_offset, pitches, &lf_info, filters,
                    dc_diffs, filter_level, 2, num_blocks, 1, thread, plane, block, mb_pitch);
            vp8_loop_filter_horizontal_edge_worker_local(mb_data, mb_offset, pitches, &lf_info, filters,
                    dc_diffs, filter_level, 3, num_blocks, 1, thread, plane, block, mb_pitch);
        }
        save_mb(threads[plane], &mb_data[mb_offset], s_base, source_offset, p, mb_row, mb_col, dc_diffs, thread);
    } else
#endif
    {
        if (mb_row > 0){
            vp8_mbloop_filter_horizontal_edge_worker(s_base, source_offset, &lf_info, thread, p);
        }
        //YUV planes, then 2 more passes of Y plane
        vp8_loop_filter_horizontal_edge_worker(s_base, source_offset, pitches, &lf_info, filters,
                dc_diffs, filter_level, 1, num_blocks, 3, thread, plane, block, p);
        if (plane == 0){
            vp8_loop_filter_horizontal_edge_worker(s_base, source_offset, pitches, &lf_info, filters,
                    dc_diffs, filter_level, 2, num_blocks, 1, thread, plane, block, p);
            vp8_loop_filter_horizontal_edge_worker(s_base, source_offset, pitches, &lf_info, filters,
                    dc_diffs, filter_level, 3, num_blocks, 1, thread, plane, block, p);
        }
    }
}

kernel void vp8_loop_filter_horizontal_edges_kernel(
    global unsigned char *s_base,
    global int *offsets,
    global int *pitches, /* pitch */
    global loop_filter_info_n *lfi_n,
    global int *filters,
    int priority_level,
    int num_levels,
    global int *block_offsets,
    global int *priority_num_blocks,
    int frame_type
){
    size_t thread = get_global_id(0);
    size_t plane = get_global_id(1);
    size_t block = get_global_id(2);
    size_t num_blocks = get_global_size(2);

    int block_offset = block_offsets[priority_level];
    filters = &filters[4*block_offset];
    offsets = &offsets[3*block_offset];
    int filter_level = filters[block];
    int p = pitches[plane];
    int dc_diffs = filters[num_blocks * DC_DIFFS_LOCATION + block];

    int source_offset = offsets[block*3 + plane];

    local loop_filter_info lf_info;
    set_lfi(lfi_n, &lf_info, frame_type, filter_level);

    int thread_level_filter = (thread<threads[plane]) & (filter_level!=0);
    int do_filter = filters[num_blocks*ROWS_LOCATION + block] > 0;
    do_filter &= thread_level_filter;
    if (do_filter){
        vp8_mbloop_filter_horizontal_edge_worker(s_base, source_offset, &lf_info, thread, p);
    }

    //YUV planes, then 2 more passes of Y plane
    if (thread_level_filter){
        vp8_loop_filter_horizontal_edge_worker(s_base, source_offset, pitches, &lf_info, filters,
                dc_diffs, filter_level, 1, num_blocks, 3, thread, plane, block, p);
        if (plane == 0){
            vp8_loop_filter_horizontal_edge_worker(s_base, source_offset, pitches, &lf_info, filters,
                    dc_diffs, filter_level, 2, num_blocks, 1, thread, plane, block, p);
            vp8_loop_filter_horizontal_edge_worker(s_base, source_offset, pitches, &lf_info, filters,
                    dc_diffs, filter_level, 3, num_blocks, 1, thread, plane, block, p);
        }
    }
}

kernel void vp8_loop_filter_vertical_edges_kernel(
    global unsigned char *s_base,
    global int *offsets,
    global int *pitches,
    global loop_filter_info_n *lfi_n,
    global int *filters,
    int priority_level,
    int num_levels,
    global int *block_offsets,
    global int *priority_num_blocks,
    int frame_type
){
    size_t thread = get_global_id(0);
    size_t plane = get_global_id(1);
    size_t block = get_global_id(2);
    size_t num_blocks = get_global_size(2);

    int block_offset = block_offsets[priority_level];

    filters = &filters[4*block_offset];
    offsets = &offsets[3*block_offset];
    int filter_level = filters[block];
    int dc_diffs = filters[num_blocks * DC_DIFFS_LOCATION + block];

    int source_offset = offsets[block*3 + plane];

    local loop_filter_info lf_info;
    set_lfi(lfi_n, &lf_info, frame_type, filter_level);

    int p = pitches[plane];

    int thread_level_filter = (thread<threads[plane]) & (filter_level!=0);
    int do_filter = filters[num_blocks*COLS_LOCATION + block] > 0;
    do_filter &= thread_level_filter;
    if (do_filter){
        vp8_mbloop_filter_vertical_edge_worker(s_base, source_offset, &lf_info, thread, p);
    }

    //YUV planes, then 2 more passes of Y plane
    if (thread_level_filter){
        //YUV planes, then 2 more passes of Y plane
        vp8_loop_filter_vertical_edge_worker(s_base, source_offset, &lf_info,
                dc_diffs, 1, thread, p);
        if (plane == 0){
            vp8_loop_filter_vertical_edge_worker(s_base, source_offset, &lf_info,
                    dc_diffs, 2, thread, p);
            vp8_loop_filter_vertical_edge_worker(s_base, source_offset, &lf_info,
                    dc_diffs, 3, thread, p);
        }
    }

}

void vp8_loop_filter_simple_horizontal_edge_worker
(
    global unsigned char *s_base,
    global int *offsets,
    global int *pitches,
    local loop_filter_info *lfi,
    global int *filters_in,
    int use_mbflim,
    int filter_type,
    int cur_iter,
    int priority_level,
    global int *block_offsets,
    global int *priority_num_blocks
){
    int filter_offset = 4*block_offsets[priority_level];
    private size_t block = get_global_id(2);
    size_t num_blocks = priority_num_blocks[priority_level];

    global int *filters = &filters_in[filter_offset];

    if (filters[num_blocks*filter_type + block] > 0){
        int filter_level = filters[block];
        if (filter_level){
            size_t i = get_global_id(0);
            int p = pitches[0];

            int s_off = cur_iter*4*p;
            s_off += i;

            signed char mask = 0;

            if (i < threads[0]){
                uchar flimit;
                if (use_mbflim == 0){
                    flimit = lfi->blim;
                } else {
                    flimit = lfi->mblim;
                }

                mask = vp8_simple_filter_mask(flimit, s_base[s_off-2*p], s_base[s_off-p], s_base[s_off], s_base[s_off+p]);
                vp8_simple_filter(mask, s_base, s_off - 2 * p, s_off - 1 * p, s_off, s_off + 1 * p);
            }
        }
    }
}

void vp8_loop_filter_simple_vertical_edge_worker(
    global unsigned char *s_base,
    global int *offsets, /* Y or YUV offsets for EACH block being processed*/
    global int *pitches, /* 1 or 3 values for Y or YUV pitches*/
    local loop_filter_info *lfi, /* Single struct for the frame */
    global int *filters_in, /* Filters for each block being processed */
    int use_mbflim, /* Use lfi->flim or lfi->mbflim, need once per kernel call */
    int filter_type, /* Should dc_diffs, rows, or cols be used?*/
    int cur_iter,
    int priority_level,
    global int *block_offsets,
    global int *priority_num_blocks
){
    int filter_offset = 4*block_offsets[priority_level];
    private size_t block = get_global_id(2);
    size_t num_blocks = priority_num_blocks[priority_level];

    global int *filters = &filters_in[filter_offset];

    if (filters[filter_type * num_blocks + block] > 0){
        int filter_level = filters[block];
        if (filter_level){
            size_t i = get_global_id(0);
            int p = pitches[0];

            int s_off = cur_iter*4;
            s_off += p * i;

            signed char mask = 0;

            if (i < threads[0]){
                uchar flimit;
                if (use_mbflim == 0){
                    flimit = lfi->blim;
                } else {
                    flimit = lfi->mblim;
                }

                mask = vp8_simple_filter_mask(flimit, s_base[s_off-2], s_base[s_off-1], s_base[s_off], s_base[s_off+1]);
                vp8_simple_filter(mask, s_base, s_off - 2, s_off - 1, s_off, s_off + 1);
            }
        }
    }
}

kernel void vp8_loop_filter_simple_vertical_edges_kernel
(
    global unsigned char *s_base,
    global int *offsets, /* Y or YUV offsets for EACH block being processed*/
    global int *pitches, /* 1 or 3 values for Y or YUV pitches*/
    global loop_filter_info_n *lfi_n, /* Single struct for the frame */
    global int *filters_in, /* Filters for each block being processed */
    int filter_type, /* Should dc_diffs, rows, or cols be used?*/
    int priority_level,
    int num_levels,
    global int *block_offsets, //Number of previously processed blocks per level
    global int *priority_num_blocks,
    int frame_type
){

    local loop_filter_info lfi;
    int block = get_global_id(2);
    int block_offset = block_offsets[priority_level];
    int filter_level = filters_in[4*block_offset + block];
    set_lfi(lfi_n, &lfi, frame_type, filter_level);

    s_base += offsets[block_offsets[priority_level] + block];

    vp8_loop_filter_simple_vertical_edge_worker(s_base, offsets, pitches,
            &lfi, filters_in, 1, COLS_LOCATION, 0, priority_level,
            block_offsets, priority_num_blocks
    );

    //3 Y plane iterations
    vp8_loop_filter_simple_vertical_edge_worker(s_base, offsets, pitches,
            &lfi, filters_in, 0, DC_DIFFS_LOCATION, 1, priority_level,
            block_offsets, priority_num_blocks
    );
    vp8_loop_filter_simple_vertical_edge_worker(s_base, offsets, pitches,
            &lfi, filters_in, 0, DC_DIFFS_LOCATION, 2, priority_level,
            block_offsets, priority_num_blocks
    );
    vp8_loop_filter_simple_vertical_edge_worker(s_base, offsets, pitches,
            &lfi, filters_in, 0, DC_DIFFS_LOCATION, 3, priority_level,
            block_offsets, priority_num_blocks
    );
}

kernel void vp8_loop_filter_simple_horizontal_edges_kernel
(
    global unsigned char *s_base,
    global int *offsets,
    global int *pitches,
    global loop_filter_info_n *lfi_n,
    global int *filters_in,
    int priority_level,
    int num_levels,
    global int *block_offsets,
    global int *priority_num_blocks,
    int frame_type
){

    local loop_filter_info lfi;
    int block = get_global_id(2);
    int block_offset = block_offsets[priority_level];
    int filter_level = filters_in[4*block_offset];
    set_lfi(lfi_n, &lfi, frame_type, filter_level);

    s_base += offsets[block_offsets[priority_level] + block];

    vp8_loop_filter_simple_horizontal_edge_worker(s_base, offsets, pitches, &lfi,
            filters_in, 1, ROWS_LOCATION, 0, priority_level,
            block_offsets, priority_num_blocks
    );
    vp8_loop_filter_simple_horizontal_edge_worker(s_base, offsets, pitches, &lfi,
            filters_in, 0, DC_DIFFS_LOCATION, 1, priority_level,
            block_offsets, priority_num_blocks
    );
    vp8_loop_filter_simple_horizontal_edge_worker(s_base, offsets, pitches, &lfi,
            filters_in, 0, DC_DIFFS_LOCATION, 2, priority_level,
            block_offsets, priority_num_blocks
    );
    vp8_loop_filter_simple_horizontal_edge_worker(s_base, offsets, pitches, &lfi,
            filters_in, 0, DC_DIFFS_LOCATION, 3, priority_level,
            block_offsets, priority_num_blocks
    );
}

kernel void vp8_loop_filter_simple_all_edges_kernel
(
    global unsigned char *s_base,
    global int *offsets,
    global int *pitches,
    global loop_filter_info_n *lfi_n,
    global int *filters_in,
    int priority_level,
    int num_levels,
    global int *block_offsets,
    global int *priority_num_blocks,
    int frame_type
)
{

    int block = (int)get_global_id(2);
    local loop_filter_info lfi;

    int block_offset = block_offsets[priority_level];
    int filter_level = filters_in[4*block_offset + block];
    set_lfi(lfi_n, &lfi, frame_type, filter_level);

    s_base += offsets[block_offsets[priority_level] + block];

    if (block < priority_num_blocks[priority_level]){
        vp8_loop_filter_simple_vertical_edge_worker(s_base, offsets, pitches,
                &lfi, filters_in, 1, COLS_LOCATION, 0, priority_level,
                block_offsets, priority_num_blocks
        );

        //3 Y plane iterations
        vp8_loop_filter_simple_vertical_edge_worker(s_base, offsets, pitches,
                &lfi, filters_in, 0, DC_DIFFS_LOCATION, 1, priority_level,
                block_offsets, priority_num_blocks
        );
        vp8_loop_filter_simple_vertical_edge_worker(s_base, offsets, pitches,
                &lfi, filters_in, 0, DC_DIFFS_LOCATION, 2, priority_level,
                block_offsets, priority_num_blocks
        );
        vp8_loop_filter_simple_vertical_edge_worker(s_base, offsets, pitches,
                &lfi, filters_in, 0, DC_DIFFS_LOCATION, 3, priority_level,
                block_offsets, priority_num_blocks
        );
    }

    barrier(CLK_GLOBAL_MEM_FENCE);

    if (block < priority_num_blocks[priority_level]){
        vp8_loop_filter_simple_horizontal_edge_worker(s_base, offsets, pitches, &lfi,
                filters_in, 1, ROWS_LOCATION, 0, priority_level,
                block_offsets, priority_num_blocks
        );
        vp8_loop_filter_simple_horizontal_edge_worker(s_base, offsets, pitches, &lfi,
                filters_in, 0, DC_DIFFS_LOCATION, 1, priority_level,
                block_offsets, priority_num_blocks
        );
        vp8_loop_filter_simple_horizontal_edge_worker(s_base, offsets, pitches, &lfi,
                filters_in, 0, DC_DIFFS_LOCATION, 2, priority_level,
                block_offsets, priority_num_blocks
        );
        vp8_loop_filter_simple_horizontal_edge_worker(s_base, offsets, pitches, &lfi,
                filters_in, 0, DC_DIFFS_LOCATION, 3, priority_level,
                block_offsets, priority_num_blocks
        );
    }
}

//Inline and non-kernel functions follow.
__inline void vp8_mbfilter_mem(
    signed char mask,
    uchar hev,
    uchar *base
)
{
    char4 u;

    char *pq = (char*)base;
    pq[0] ^= 0x80;
    pq[1] ^= 0x80;
    pq[2] ^= 0x80;
    pq[3] ^= 0x80;
    pq[4] ^= 0x80;
    pq[5] ^= 0x80;

    /* add outer taps if we have high edge variance */
    char vp8_filter = sub_sat(pq[2], pq[5]);
    vp8_filter = clamp(vp8_filter + 3 * (pq[4] - pq[3]), -128, 127);
    vp8_filter &= mask;

    char2 filter = (char2)vp8_filter;
    filter &= (char2)hev;

    /* save bottom 3 bits so that we round one side +4 and the other +3 */
    char2 rounding = {4,3};
    filter = add_sat(filter, rounding);
    filter.s0 >>= 3;
    filter.s1 >>= 3;

    pq[4] = sub_sat(pq[4], filter.s0);
    pq[3] = add_sat(pq[3], filter.s1);

    /* only apply wider filter if not high edge variance */
    filter.s1 = vp8_filter & ~hev;

    /* roughly 3/7th, 2/7th, and 1/7th difference across boundary */
    u.s0 = clamp((63 + filter.s1 * 27) >> 7, -128, 127);
    u.s1 = clamp((63 + filter.s1 * 18) >> 7, -128, 127);
    u.s2 = clamp((63 + filter.s1 * 9) >> 7, -128, 127);
    u.s3 = 0;

    char4 s;
    s = sub_sat(vload4(0, &pq[4]), u);
    pq[4] = s.s0 ^ 0x80;
    pq[5] = s.s1 ^ 0x80;
    pq[6] = s.s2 ^ 0x80;
    pq[7] = s.s3;

    s = add_sat(vload4(0, pq), u.s3210);
    pq[0] = s.s0;
    pq[1] = s.s1 ^ 0x80;
    pq[2] = s.s2 ^ 0x80;
    pq[3] = s.s3 ^ 0x80;
}

__inline uchar8 vp8_mbfilter(
    signed char mask,
    uchar hev,
    uchar8 base
)
{
    char4 u;

    char8 pq = as_char8(base);
    pq ^= (char8){0, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0};

    /* add outer taps if we have high edge variance */
    char vp8_filter = sub_sat(pq.s2, pq.s5);
    vp8_filter = clamp(vp8_filter + 3 * (pq.s4 - pq.s3), -128, 127);
    vp8_filter &= mask;

    char2 filter = (char2)vp8_filter;
    filter &= (char2)hev;

    /* save bottom 3 bits so that we round one side +4 and the other +3 */
    char2 rounding = {4,3};
    filter = add_sat(filter, rounding);
    filter.s0 >>= 3;
    filter.s1 >>= 3;

    pq.s4 = sub_sat(pq.s4, filter.s0);
    pq.s3 = add_sat(pq.s3, filter.s1);

    /* only apply wider filter if not high edge variance */
    filter.s1 = vp8_filter & ~hev;

    /* roughly 3/7th, 2/7th, and 1/7th difference across boundary */
    u.s0 = clamp((63 + filter.s1 * 27) >> 7, -128, 127);
    u.s1 = clamp((63 + filter.s1 * 18) >> 7, -128, 127);
    u.s2 = clamp((63 + filter.s1 * 9) >> 7, -128, 127);
    u.s3 = 0;

    char4 s;
    s = sub_sat(pq.s4567, u);
    pq.s4567 = s ^ (char4){0x80, 0x80, 0x80, 0};
    s = add_sat(pq.s0123, u.s3210);
    pq.s0123 = s ^ (char4){0, 0x80, 0x80, 0x80};

    return as_uchar8(pq);
}

__inline char vp8_hevmask_mem(uchar thresh, uchar *pq){
#if 0
    signed char hev = 0;
    hev  |= (abs(pq[0] - pq[1]) > thresh) * -1;
    hev  |= (abs(pq[3] - pq[2]) > thresh) * -1;
    return hev;
#else
    uchar mask = abs_diff(pq[0], pq[1]) > thresh;
    mask |= abs_diff(pq[3], pq[2]) > thresh;
    return ~mask + 1;
#endif
}

/* is there high variance internal edge ( 11111111 yes, 00000000 no) */
__inline char vp8_hevmask(uchar thresh, uchar4 pq)
{
    return ~any(abs_diff(pq.s03, pq.s12) > (uchar2)thresh) + 1;
}

__inline signed char vp8_filter_mask_mem(uc limit, uc blimit, uchar *pq)
{
    //Only apply the filter if the difference is LESS than 'limit'
    char mask = (abs_diff(pq[0], pq[1]) > limit);
    mask |= (abs_diff(pq[1], pq[2]) > limit);
    mask |= (abs_diff(pq[2], pq[3]) > limit);
    mask |= (abs_diff(pq[5], pq[4]) > limit);
    mask |= (abs_diff(pq[6], pq[5]) > limit);
    mask |= (abs_diff(pq[7], pq[6]) > limit);
    mask |= (abs_diff(pq[3], pq[4]) * 2 + abs_diff(pq[2], pq[5]) / 2  > blimit);
    return mask - 1;
}

/* should we apply any filter at all ( 11111111 yes, 00000000 no) */
__inline signed char vp8_filter_mask(uc limit, uc blimit, uchar8 pq)
{
#if 1
   //Only apply the filter if the difference is LESS than 'limit'
    signed char mask = (abs_diff(pq.s0, pq.s1) > limit);
    mask |= (abs_diff(pq.s1, pq.s2) > limit);
    mask |= (abs_diff(pq.s2, pq.s3) > limit);
    mask |= (abs_diff(pq.s5, pq.s4) > limit);
    mask |= (abs_diff(pq.s6, pq.s5) > limit);
    mask |= (abs_diff(pq.s7, pq.s6) > limit);
    mask |= (abs_diff(pq.s3, pq.s4) * 2 + abs_diff(pq.s2, pq.s5) / 2  > blimit);
    return mask - 1;
#else
	char8 mask8 = abs_diff(pq.s01256700, pq.s12345600) > limit;
	mask8 |= (char8)(abs_diff(pq.s3, pq.s4) * 2 + abs_diff(pq.s2, pq.s5) / 2 > blimit);
	mask8--;
	return any(mask8) ? -1 : 0;
#endif
}

/* should we apply any filter at all ( 11111111 yes, 00000000 no) */
__inline signed char vp8_simple_filter_mask(uc blimit, uc p1, uc p0, uc q0, uc q1)
{
    signed char mask = (abs(p0 - q0) * 2 + abs(p1 - q1) / 2  <= blimit) * -1;
    return mask;
}

__inline void vp8_simple_filter(
    signed char mask,
    global uc *base,
    int op1_off,
    int op0_off,
    int oq0_off,
    int oq1_off
)
{

    global uc *op1 = base + op1_off;
    global uc *op0 = base + op0_off;
    global uc *oq0 = base + oq0_off;
    global uc *oq1 = base + oq1_off;

    signed char vp8_filter;
    char2 filter;

    char4 pq = (char4){*op1, *op0, *oq0, *oq1};
    pq ^= (char4)0x80;

    signed char u;

    vp8_filter = sub_sat(pq.s0, pq.s3);
    vp8_filter = clamp(vp8_filter + 3 * (pq.s2 - pq.s1), -128, 127);
    vp8_filter &= mask;

    /* save bottom 3 bits so that we round one side +4 and the other +3 */
    char2 rounding = {4,3};
    filter = add_sat((char2)vp8_filter, rounding);
    filter.s0 >>= 3;
    filter.s1 >>= 3;

    u = sub_sat(pq.s2, filter.s0);
    *oq0  = u ^ 0x80;

    u = add_sat(pq.s1, filter.s1);
    *op0 = u ^ 0x80;
}

__inline void set_lfi(global loop_filter_info_n *lfi_n, local loop_filter_info *lfi, int frame_type, int filter_level){
    if (get_local_id(0) == 0 && get_local_id(1)==0 && get_local_id(2)==0){
        int hev_index = lfi_n->hev_thr_lut[frame_type][filter_level];
        lfi->mblim = lfi_n->mblim[filter_level][0];
        lfi->blim = lfi_n->blim[filter_level][0];
        lfi->lim = lfi_n->lim[filter_level][0];
        lfi->hev_thr = lfi_n->hev_thr[hev_index][0];
    }
}

#pragma OPENCL EXTENSION cl_khr_byte_addressable_store : enable
#pragma OPENCL EXTENSION cl_amd_printf : enable

typedef unsigned char uc;
typedef signed char sc;

__inline signed char vp8_filter_mask_mem(uc, uc, uchar*);
__inline signed char vp8_filter_mask(uc, uc, uchar8);

__inline char vp8_hevmask_mem(uchar, uchar*);
__inline char vp8_hevmask(uchar, uchar4);

__inline void vp8_filter_mem( signed char mask, uchar hev, uchar *base);

__inline signed char vp8_simple_filter_mask(uc, uc, uc, uc, uc);

__inline uchar8 vp8_mbfilter(signed char mask, uchar hev, uchar8);

__inline void vp8_simple_filter(signed char mask,global uc *base, int op1_off,int op0_off,int oq0_off,int oq1_off);

constant size_t threads[3] = {16, 8, 8};

#ifndef __CL_VERSION_1_0__
#define __CL_VERSION_1_0__ 100
#endif

#if !defined(__OPENCL_VERSION__) || (__OPENCL_VERSION__ == __CL_VERSION_1_0__)
#define clamp(x,y,z) vp8_char_clamp(x)
char vp8_char_clamp(int in){
    return max(min(in, 127), -128);
}
#endif

typedef struct
{
    unsigned char mblim[MAX_LOOP_FILTER + 1][SIMD_WIDTH];
    unsigned char blim[MAX_LOOP_FILTER + 1][SIMD_WIDTH];
    unsigned char lim[MAX_LOOP_FILTER + 1][SIMD_WIDTH];
    unsigned char hev_thr[4][SIMD_WIDTH];
    unsigned char lvl[4][4][4];
    unsigned char hev_thr_lut[2][MAX_LOOP_FILTER + 1];
    unsigned char mode_lf_lut[10];
} loop_filter_info_n __attribute__ ((aligned(SIMD_WIDTH)));

typedef struct
{
    unsigned char mblim;
    unsigned char blim;
    unsigned char lim;
    unsigned char hev_thr;
} loop_filter_info;

__inline void set_lfi(global loop_filter_info_n *lfi_n, local loop_filter_info *lfi, int frame_type, int filter_level);

__inline void vp8_filter_mem(
    signed char mask,
    uchar hev,
    uchar *base
)
{

    char *pq = (char*)base;
    pq[0] ^= 0x80;
    pq[1] ^= 0x80;
    pq[2] ^= 0x80;
    pq[3] ^= 0x80;

    char vp8_filter;
    char2 Filter;
    char4 u;

    /* add outer taps if we have high edge variance */
    vp8_filter = sub_sat(pq[0], pq[3]);
    vp8_filter &= hev;

    /* inner taps */
    vp8_filter = clamp(vp8_filter + 3 * (pq[2] - pq[1]), -128, 127);
    vp8_filter &= mask;

    /* save bottom 3 bits so that we round one side +4 and the other +3
     * if it equals 4 we'll set to adjust by -1 to account for the fact
     * we'd round 3 the other way
     */
    char2 rounding = {4,3};
    Filter = add_sat((char2)vp8_filter, rounding);
    Filter.s0 >>= 3;
    Filter.s1 >>= 3;

    /* outer tap adjustments */
    vp8_filter = Filter.s0 + 1;
    vp8_filter >>= 1;
    vp8_filter &= ~hev;

    u.s0 = add_sat(pq[0], vp8_filter);
    u.s1 = add_sat(pq[1], Filter.s1);
    u.s2 = sub_sat(pq[2], Filter.s0);
    u.s3 = sub_sat(pq[3], vp8_filter);

    pq[0] = u.s0 ^ 0x80;
    pq[1] = u.s1 ^ 0x80;
    pq[2] = u.s2 ^ 0x80;
    pq[3] = u.s3 ^ 0x80;

}

__inline uchar4 vp8_filter(
    signed char mask,
    uchar hev,
    uchar4 base
)
{
    char4 pq = as_char4(base) ^ (char4)0x80;

    char vp8_filter;
    char2 Filter;
    char4 u;

    /* add outer taps if we have high edge variance */
    vp8_filter = sub_sat(pq.s0, pq.s3);
    vp8_filter &= hev;

    /* inner taps */
    vp8_filter = clamp(vp8_filter + 3 * (pq.s2 - pq.s1), -128, 127);
    vp8_filter &= mask;

    /* save bottom 3 bits so that we round one side +4 and the other +3
     * if it equals 4 we'll set to adjust by -1 to account for the fact
     * we'd round 3 the other way
     */
    char2 rounding = {4,3};
    Filter = add_sat((char2)vp8_filter, rounding);
    Filter.s0 >>= 3;
    Filter.s1 >>= 3;

    /* outer tap adjustments */
    vp8_filter = Filter.s0 + 1;
    vp8_filter >>= 1;
    vp8_filter &= ~hev;

    u.s0 = add_sat(pq.s0, vp8_filter);
    u.s1 = add_sat(pq.s1, Filter.s1);
    u.s2 = sub_sat(pq.s2, Filter.s0);
    u.s3 = sub_sat(pq.s3, vp8_filter);

    return as_uchar4(u ^ (char4)0x80);

}

__inline uchar8 load8(global unsigned char *s_base, int s_off, int p){
    uchar8 data;
    data.s0 = s_base[s_off-4*p];
    data.s1 = s_base[s_off-3*p];
    data.s2 = s_base[s_off-2*p];
    data.s3 = s_base[s_off-p];
    data.s4 = s_base[s_off];
    data.s5 = s_base[s_off+p];
    data.s6 = s_base[s_off+2*p];
    data.s7 = s_base[s_off+3*p];
    return data;
}

__inline uchar8 load8_local(local unsigned char *s_base, int s_off, int p){
    uchar8 data;
    data.s0 = s_base[s_off-4*p];
    data.s1 = s_base[s_off-3*p];
    data.s2 = s_base[s_off-2*p];
    data.s3 = s_base[s_off-p];
    data.s4 = s_base[s_off];
    data.s5 = s_base[s_off+p];
    data.s6 = s_base[s_off+2*p];
    data.s7 = s_base[s_off+3*p];
    return data;
}

__inline void save4(global unsigned char *s_base, int s_off, int p, uchar8 data){
    s_base[s_off - 2*p] = data.s2;
    s_base[s_off - p  ] = data.s3;
    s_base[s_off      ] = data.s4;
    s_base[s_off + p  ] = data.s5;
}

__inline void save4_local(local unsigned char *s_base, int s_off, int p, uchar8 data){
    s_base[s_off - 2*p] = data.s2;
    s_base[s_off - p  ] = data.s3;
    s_base[s_off      ] = data.s4;
    s_base[s_off + p  ] = data.s5;
}

__inline void save6(global unsigned char *s_base, int s_off, int p, uchar8 data){
    s_base[s_off - 3*p] = data.s1;
    s_base[s_off - 2*p] = data.s2;
    s_base[s_off - p  ] = data.s3;
    s_base[s_off      ] = data.s4;
    s_base[s_off + p  ] = data.s5;
    s_base[s_off + 2*p  ] = data.s6;
}

__inline void save6_local(local unsigned char *s_base, int s_off, int p, uchar8 data){
    s_base[s_off - 3*p] = data.s1;
    s_base[s_off - 2*p] = data.s2;
    s_base[s_off - p  ] = data.s3;
    s_base[s_off      ] = data.s4;
    s_base[s_off + p  ] = data.s5;
    s_base[s_off + 2*p  ] = data.s6;
}

__inline uchar16 load16(global unsigned char *s_base, int s_off, int p){
    uchar16 data;
    data.s01234567 = load8(s_base, s_off, p);
    data.s89abcdef = load8(s_base, s_off+8*p, p);
    return data;
}

__inline void save12(global unsigned char *s_base, int s_off, int p, uchar16 data){
    s_base[s_off - 2*p] = data.s2;
    s_base[s_off - p  ] = data.s3;
    s_base[s_off      ] = data.s4;
    s_base[s_off + p  ] = data.s5;
    s_base[s_off + 2*p] = data.s6;
    s_base[s_off + 3*p] = data.s7;
    s_base[s_off + 4*p] = data.s8;
    s_base[s_off + 5*p] = data.s9;
    s_base[s_off + 6*p] = data.sa;
    s_base[s_off + 7*p] = data.sb;
    s_base[s_off + 8*p] = data.sc;
    s_base[s_off + 9*p] = data.sd;
}

// Filters horizontal edges of inner blocks in a Macroblock
__inline void vp8_loop_filter_horizontal_edge_worker(
    global uchar *s_base,
    int source_offset,
    global int *pitches, /* pitch */
    local loop_filter_info *lfi,
    global int *filters,
    int dc_diffs,
    int filter_level,
    int cur_iter,
    size_t num_blocks,
    size_t num_planes,
    size_t thread,
    size_t plane,
    size_t block,
    int p //pitches[plane]
){
    uchar8 data;
    if (dc_diffs > 0){
        int s_off = source_offset + 4*cur_iter*p; //Move down 4 lines per iter
        s_off += thread; //Move to the right part of the horizontal line

        data = load8(s_base, s_off, p);

        char mask = vp8_filter_mask(lfi->lim, lfi->blim, data);

        char hev = vp8_hevmask(lfi->hev_thr, data.s2345);

        data.s2345 = vp8_filter(mask, hev, data.s2345);

        save4(s_base, s_off, p, data);
    }
}

// Filters horizontal edges of inner blocks in a Macroblock
__inline void vp8_loop_filter_horizontal_edge_worker_local(
    local uchar *s_base,
    int source_offset,
    global int *pitches, /* pitch */
    local loop_filter_info *lfi,
    global int *filters,
    int dc_diffs,
    int filter_level,
    int cur_iter,
    size_t num_blocks,
    size_t num_planes,
    size_t thread,
    size_t plane,
    size_t block,
    int p //pitches[plane]
){
    uchar8 data;
    if (dc_diffs > 0){
        int s_off = source_offset + 4*cur_iter*p; //Move down 4 lines per iter
        s_off += thread; //Move to the right part of the horizontal line

        data = load8_local(s_base, s_off, p);

        char mask = vp8_filter_mask(lfi->lim, lfi->blim, data);

        char hev = vp8_hevmask(lfi->hev_thr, data.s2345);

        data.s2345 = vp8_filter(mask, hev, data.s2345);

        save4_local(s_base, s_off, p, data);
    }
}

__inline void vp8_loop_filter_vertical_edge_worker(
    global uchar *s_base,
    int source_offset,
    local loop_filter_info *lfi,
    int dc_diffs,
    int cur_iter,
    size_t thread,
    int p
){
    uchar8 data;
    if (dc_diffs > 0){
        int s_off = source_offset + 4*cur_iter; //Move right 4 cols per iter
        s_off += thread * p; //Move down to the right part of the vertical line

        data = load8(s_base, s_off, 1);

        char mask = vp8_filter_mask(lfi->lim, lfi->blim, data);

        int hev = vp8_hevmask(lfi->hev_thr, data.s2345);

        data.s2345 = vp8_filter(mask, hev, data.s2345);
        save4(s_base, s_off, 1, data);
    }
}

__inline void vp8_loop_filter_vertical_edge_worker_local(
    local uchar *s_base,
    int source_offset,
    local loop_filter_info *lfi,
    int dc_diffs,
    int cur_iter,
    size_t thread,
    int p
){
    uchar8 data;
    if (dc_diffs > 0){
        int s_off = source_offset + 4*cur_iter; //Move right 4 cols per iter
        s_off += thread * p; //Move down to the right part of the vertical line

        data = load8_local(s_base, s_off, 1);

        char mask = vp8_filter_mask(lfi->lim, lfi->blim, data);

        int hev = vp8_hevmask(lfi->hev_thr, data.s2345);

        data.s2345 = vp8_filter(mask, hev, data.s2345);
        save4_local(s_base, s_off, 1, data);
    }
}

__inline void vp8_mbloop_filter_horizontal_edge_worker(
    global unsigned char *s_base,
    int source_offset,
    local loop_filter_info *lfi,
    size_t thread,
    int p //pitches[plane]
){

    int s_off = source_offset + thread;

    uchar8 data = load8(s_base, s_off, p);

    char mask = vp8_filter_mask(lfi->lim, lfi->mblim, data);

    char hev = vp8_hevmask(lfi->hev_thr, data.s2345);

    data = vp8_mbfilter(mask, hev, data);

    save6(s_base, s_off, p, data);

}

__inline void vp8_mbloop_filter_horizontal_edge_worker_local(
    local unsigned char *s_base,
    int source_offset,
    local loop_filter_info *lfi,
    size_t thread,
    int p //pitches[plane]
){

    int s_off = source_offset + thread;

    uchar8 data = load8_local(s_base, s_off, p);

    char mask = vp8_filter_mask(lfi->lim, lfi->mblim, data);

    char hev = vp8_hevmask(lfi->hev_thr, data.s2345);

    data = vp8_mbfilter(mask, hev, data);

    save6_local(s_base, s_off, p, data);

}

__inline void vp8_mbloop_filter_vertical_edge_worker(
    global unsigned char *s_base,
    int source_offset,
    local loop_filter_info *lfi,
    size_t thread,
    int p //pitches[plane]
){

    int s_off = source_offset + p*thread;

    uchar8 data = load8(s_base, s_off, 1);

    char mask = vp8_filter_mask(lfi->lim, lfi->mblim, data);

    int hev = vp8_hevmask(lfi->hev_thr, data.s2345);

    data = vp8_mbfilter(mask, hev, data);

    save6(s_base, s_off, 1, data);
}

__inline void vp8_mbloop_filter_vertical_edge_worker_local(
    local unsigned char *s_base,
    int source_offset,
    local loop_filter_info *lfi,
    size_t thread,
    int p //threads[plane]+4
){

    int s_off = source_offset + p*thread;

    uchar8 data = load8_local(s_base, s_off, 1);

    char mask = vp8_filter_mask(lfi->lim, lfi->mblim, data);

    int hev = vp8_hevmask(lfi->hev_thr, data.s2345);

    data = vp8_mbfilter(mask, hev, data);

    save6_local(s_base, s_off, 1, data);
}

//Assumes a work group size of 1 plane
__inline void load_mb(int size, local uchar *dst, global uchar *src, int src_off, int src_pitch, int mb_row, int mb_col, int dc_diffs, int thread){
    //Load 4 row top border if row != 0, starting at row 0, col 4
    int dst_pitch = size + 4;
    int start, end;

    if (mb_row > 0){
        start = -4;
        end = 4;
        if (dc_diffs > 0){
            end = 0;
        }

        for (int i = start; i < end; i++){
                dst[i*dst_pitch + thread] = src[i*src_pitch + src_off + thread];
        }
    }

    //Load 4 col left border if col != 0, otherwise just the pixels of block data
    start = 0;
    if ( mb_col > 0 )
        start = -4;
    end = 4;
    if (dc_diffs > 0){
        end = size;
    }

    //Load 16x16 or 8x8 pixels of Macroblock data with destination starting at
    //row 4, col 4.
    for (int i = start; i < end; i++){
        dst[thread*dst_pitch + i] = src[thread*src_pitch + src_off + i];
    }
}

__inline void save_mb(int size, local uchar *src, global uchar *dst, int dst_off, int dst_pitch, int mb_row, int mb_col, int dc_diffs, int thread){
    //Load 4 row top border if row != 0, starting at row 0, col 4
    int src_pitch = size + 4;
    int start, end;
    if (mb_row > 0){
        start = -3;
        end = 3;
        if (dc_diffs > 0){
            end = 1;
        }

        for (int i = start; i < end; i++){
            dst[i*dst_pitch + dst_off + thread] = src[i*src_pitch + thread];
        }
    }

    //Save 3 col left border if col != 0, otherwise just the pixels of block data
    if (mb_col > 0){
        start = -3;
    } else {
        start = 0;
    }

    if (dc_diffs > 0){
        end = size;
    } else
        end = 3;

    //Save 16x16 or 8x8 pixels of Macroblock data with destination starting at
    //row 4, col 4.
    for (int i = start; i < end; i++){
        dst[thread*dst_pitch + dst_off + i] = src[thread*src_pitch + i];
    }
}

kernel void vp8_loop_filter_all_edges_kernel(
    global unsigned char *s_base,
    global int *offsets_in,
    global int *pitches,
    global loop_filter_info_n *lfi_n,
    global int *filters_in,
    int priority_level,
    int num_levels,
    global int *block_offsets,
    global int *priority_num_blocks,
    int frame_type
){

    size_t block = get_global_id(2);

    int block_offset = block_offsets[priority_level];
    global int *filters = &filters_in[4*block_offset];
    int filter_level = filters[block];
    if ( filter_level <= 0 )
        return;

    size_t thread = get_global_id(0);
    size_t plane = 0;

    //Threads 0-15 are Y plane, 16-23 are U, 24-31 are V.
    if (thread > 15){
        plane += thread / 8 - 1;
        thread = thread % 8;
    }

    global int *offsets = &offsets_in[3*block_offset];
    size_t num_blocks = priority_num_blocks[priority_level];
    local loop_filter_info lf_info;
    //if (get_local_id(0) == 0){
        set_lfi(lfi_n, &lf_info, frame_type, filter_level);
    //}

    int source_offset = offsets[block*3 + plane];

    int p = pitches[plane];

    int mb_col = filters[num_blocks * COLS_LOCATION + block];
    int mb_row = filters[num_blocks * ROWS_LOCATION + block];
    int dc_diffs = filters[num_blocks * DC_DIFFS_LOCATION + block];

#define USE_LOCAL_MEM_FILTER 0
#if USE_LOCAL_MEM_FILTER
    //At the moment this local memory mechanism only works if local number of
    //threads == 16
    local uchar mb_data[1200]; //Local copy of frame data for current plane
    int mb_offset, mb_pitch;

    int local_global_match = (get_local_size(0) == get_global_size(0));

    if ( local_global_match){
        mb_offset = 4+4*(threads[plane]+4) + 400*plane;
        mb_pitch = threads[plane]+4;

        load_mb(threads[plane], &mb_data[mb_offset], s_base, source_offset, p, mb_row, mb_col, dc_diffs, thread);
        write_mem_fence(CLK_LOCAL_MEM_FENCE);
    }
#endif

#if USE_LOCAL_MEM_FILTER
    if ( local_global_match ){
        if ( mb_col > 0 ){
            vp8_mbloop_filter_vertical_edge_worker_local(mb_data, mb_offset, &lf_info, thread, mb_pitch);
        }

        //YUV planes, then 2 more passes of Y plane
        vp8_loop_filter_vertical_edge_worker_local(mb_data, mb_offset, &lf_info,
                dc_diffs, 1, thread, mb_pitch);
        if (plane == 0){
            vp8_loop_filter_vertical_edge_worker_local(mb_data, mb_offset, &lf_info,
                    dc_diffs, 2, thread, mb_pitch);
            vp8_loop_filter_vertical_edge_worker_local(mb_data, mb_offset, &lf_info,
                    dc_diffs, 3, thread, mb_pitch);
        }
    } else {
#endif
        //Load/stores directly out of global memory.
        if ( mb_col > 0 ){
            vp8_mbloop_filter_vertical_edge_worker(s_base, source_offset, &lf_info, thread, p);
        }
        //YUV planes, then 2 more passes of Y plane
        vp8_loop_filter_vertical_edge_worker(s_base, source_offset, &lf_info,
                dc_diffs, 1, thread, p);
        if (plane == 0){
            vp8_loop_filter_vertical_edge_worker(s_base, source_offset, &lf_info,
                    dc_diffs, 2, thread, p);
            vp8_loop_filter_vertical_edge_worker(s_base, source_offset, &lf_info,
                    dc_diffs, 3, thread, p);
        }
        write_mem_fence(CLK_GLOBAL_MEM_FENCE);
#if USE_LOCAL_MEM_FILTER
    }

    if ( local_global_match ){
        if (mb_row > 0){
            vp8_mbloop_filter_horizontal_edge_worker_local(mb_data, mb_offset, &lf_info, thread, mb_pitch);
        }
        //YUV planes, then 2 more passes of Y plane
        vp8_loop_filter_horizontal_edge_worker_local(mb_data, mb_offset, pitches, &lf_info, filters,
                dc_diffs, filter_level, 1, num_blocks, 3, thread, plane, block, mb_pitch);
        if (plane == 0){
            vp8_loop_filter_horizontal_edge_worker_local(mb_data, mb_offset, pitches, &lf_info, filters,
                    dc_diffs, filter_level, 2, num_blocks, 1, thread, plane, block, mb_pitch);
            vp8_loop_filter_horizontal_edge_worker_local(mb_data, mb_offset, pitches, &lf_info, filters,
                    dc_diffs, filter_level, 3, num_blocks, 1, thread, plane, block, mb_pitch);
        }
        save_mb(threads[plane], &mb_data[mb_offset], s_base, source_offset, p, mb_row, mb_col, dc_diffs, thread);
    } else
#endif
    {
        if (mb_row > 0){
            vp8_mbloop_filter_horizontal_edge_worker(s_base, source_offset, &lf_info, thread, p);
        }
        //YUV planes, then 2 more passes of Y plane
        vp8_loop_filter_horizontal_edge_worker(s_base, source_offset, pitches, &lf_info, filters,
                dc_diffs, filter_level, 1, num_blocks, 3, thread, plane, block, p);
        if (plane == 0){
            vp8_loop_filter_horizontal_edge_worker(s_base, source_offset, pitches, &lf_info, filters,
                    dc_diffs, filter_level, 2, num_blocks, 1, thread, plane, block, p);
            vp8_loop_filter_horizontal_edge_worker(s_base, source_offset, pitches, &lf_info, filters,
                    dc_diffs, filter_level, 3, num_blocks, 1, thread, plane, block, p);
        }
    }
}

kernel void vp8_loop_filter_horizontal_edges_kernel(
    global unsigned char *s_base,
    global int *offsets,
    global int *pitches, /* pitch */
    global loop_filter_info_n *lfi_n,
    global int *filters,
    int priority_level,
    int num_levels,
    global int *block_offsets,
    global int *priority_num_blocks,
    int frame_type
){
    size_t thread = get_global_id(0);
    size_t plane = get_global_id(1);
    size_t block = get_global_id(2);
    size_t num_blocks = get_global_size(2);

    int block_offset = block_offsets[priority_level];
    filters = &filters[4*block_offset];
    offsets = &offsets[3*block_offset];
    int filter_level = filters[block];
    int p = pitches[plane];
    int dc_diffs = filters[num_blocks * DC_DIFFS_LOCATION + block];

    int source_offset = offsets[block*3 + plane];

    local loop_filter_info lf_info;
    set_lfi(lfi_n, &lf_info, frame_type, filter_level);

    int thread_level_filter = (thread<threads[plane]) & (filter_level!=0);
    int do_filter = filters[num_blocks*ROWS_LOCATION + block] > 0;
    do_filter &= thread_level_filter;
    if (do_filter){
        vp8_mbloop_filter_horizontal_edge_worker(s_base, source_offset, &lf_info, thread, p);
    }

    //YUV planes, then 2 more passes of Y plane
    if (thread_level_filter){
        vp8_loop_filter_horizontal_edge_worker(s_base, source_offset, pitches, &lf_info, filters,
                dc_diffs, filter_level, 1, num_blocks, 3, thread, plane, block, p);
        if (plane == 0){
            vp8_loop_filter_horizontal_edge_worker(s_base, source_offset, pitches, &lf_info, filters,
                    dc_diffs, filter_level, 2, num_blocks, 1, thread, plane, block, p);
            vp8_loop_filter_horizontal_edge_worker(s_base, source_offset, pitches, &lf_info, filters,
                    dc_diffs, filter_level, 3, num_blocks, 1, thread, plane, block, p);
        }
    }
}

kernel void vp8_loop_filter_vertical_edges_kernel(
    global unsigned char *s_base,
    global int *offsets,
    global int *pitches,
    global loop_filter_info_n *lfi_n,
    global int *filters,
    int priority_level,
    int num_levels,
    global int *block_offsets,
    global int *priority_num_blocks,
    int frame_type
){
    size_t thread = get_global_id(0);
    size_t plane = get_global_id(1);
    size_t block = get_global_id(2);
    size_t num_blocks = get_global_size(2);

    int block_offset = block_offsets[priority_level];

    filters = &filters[4*block_offset];
    offsets = &offsets[3*block_offset];
    int filter_level = filters[block];
    int dc_diffs = filters[num_blocks * DC_DIFFS_LOCATION + block];

    int source_offset = offsets[block*3 + plane];

    local loop_filter_info lf_info;
    set_lfi(lfi_n, &lf_info, frame_type, filter_level);

    int p = pitches[plane];

    int thread_level_filter = (thread<threads[plane]) & (filter_level!=0);
    int do_filter = filters[num_blocks*COLS_LOCATION + block] > 0;
    do_filter &= thread_level_filter;
    if (do_filter){
        vp8_mbloop_filter_vertical_edge_worker(s_base, source_offset, &lf_info, thread, p);
    }

    //YUV planes, then 2 more passes of Y plane
    if (thread_level_filter){
        //YUV planes, then 2 more passes of Y plane
        vp8_loop_filter_vertical_edge_worker(s_base, source_offset, &lf_info,
                dc_diffs, 1, thread, p);
        if (plane == 0){
            vp8_loop_filter_vertical_edge_worker(s_base, source_offset, &lf_info,
                    dc_diffs, 2, thread, p);
            vp8_loop_filter_vertical_edge_worker(s_base, source_offset, &lf_info,
                    dc_diffs, 3, thread, p);
        }
    }

}

void vp8_loop_filter_simple_horizontal_edge_worker
(
    global unsigned char *s_base,
    global int *offsets,
    global int *pitches,
    local loop_filter_info *lfi,
    global int *filters_in,
    int use_mbflim,
    int filter_type,
    int cur_iter,
    int priority_level,
    global int *block_offsets,
    global int *priority_num_blocks
){
    int filter_offset = 4*block_offsets[priority_level];
    private size_t block = get_global_id(2);
    size_t num_blocks = priority_num_blocks[priority_level];

    global int *filters = &filters_in[filter_offset];

    if (filters[num_blocks*filter_type + block] > 0){
        int filter_level = filters[block];
        if (filter_level){
            size_t i = get_global_id(0);
            int p = pitches[0];

            int s_off = cur_iter*4*p;
            s_off += i;

            signed char mask = 0;

            if (i < threads[0]){
                uchar flimit;
                if (use_mbflim == 0){
                    flimit = lfi->blim;
                } else {
                    flimit = lfi->mblim;
                }

                mask = vp8_simple_filter_mask(flimit, s_base[s_off-2*p], s_base[s_off-p], s_base[s_off], s_base[s_off+p]);
                vp8_simple_filter(mask, s_base, s_off - 2 * p, s_off - 1 * p, s_off, s_off + 1 * p);
            }
        }
    }
}

void vp8_loop_filter_simple_vertical_edge_worker(
    global unsigned char *s_base,
    global int *offsets, /* Y or YUV offsets for EACH block being processed*/
    global int *pitches, /* 1 or 3 values for Y or YUV pitches*/
    local loop_filter_info *lfi, /* Single struct for the frame */
    global int *filters_in, /* Filters for each block being processed */
    int use_mbflim, /* Use lfi->flim or lfi->mbflim, need once per kernel call */
    int filter_type, /* Should dc_diffs, rows, or cols be used?*/
    int cur_iter,
    int priority_level,
    global int *block_offsets,
    global int *priority_num_blocks
){
    int filter_offset = 4*block_offsets[priority_level];
    private size_t block = get_global_id(2);
    size_t num_blocks = priority_num_blocks[priority_level];

    global int *filters = &filters_in[filter_offset];

    if (filters[filter_type * num_blocks + block] > 0){
        int filter_level = filters[block];
        if (filter_level){
            size_t i = get_global_id(0);
            int p = pitches[0];

            int s_off = cur_iter*4;
            s_off += p * i;

            signed char mask = 0;

            if (i < threads[0]){
                uchar flimit;
                if (use_mbflim == 0){
                    flimit = lfi->blim;
                } else {
                    flimit = lfi->mblim;
                }

                mask = vp8_simple_filter_mask(flimit, s_base[s_off-2], s_base[s_off-1], s_base[s_off], s_base[s_off+1]);
                vp8_simple_filter(mask, s_base, s_off - 2, s_off - 1, s_off, s_off + 1);
            }
        }
    }
}

kernel void vp8_loop_filter_simple_vertical_edges_kernel
(
    global unsigned char *s_base,
    global int *offsets, /* Y or YUV offsets for EACH block being processed*/
    global int *pitches, /* 1 or 3 values for Y or YUV pitches*/
    global loop_filter_info_n *lfi_n, /* Single struct for the frame */
    global int *filters_in, /* Filters for each block being processed */
    int filter_type, /* Should dc_diffs, rows, or cols be used?*/
    int priority_level,
    int num_levels,
    global int *block_offsets, //Number of previously processed blocks per level
    global int *priority_num_blocks,
    int frame_type
){

    local loop_filter_info lfi;
    int block = get_global_id(2);
    int block_offset = block_offsets[priority_level];
    int filter_level = filters_in[4*block_offset + block];
    set_lfi(lfi_n, &lfi, frame_type, filter_level);

    s_base += offsets[block_offsets[priority_level] + block];

    vp8_loop_filter_simple_vertical_edge_worker(s_base, offsets, pitches,
            &lfi, filters_in, 1, COLS_LOCATION, 0, priority_level,
            block_offsets, priority_num_blocks
    );

    //3 Y plane iterations
    vp8_loop_filter_simple_vertical_edge_worker(s_base, offsets, pitches,
            &lfi, filters_in, 0, DC_DIFFS_LOCATION, 1, priority_level,
            block_offsets, priority_num_blocks
    );
    vp8_loop_filter_simple_vertical_edge_worker(s_base, offsets, pitches,
            &lfi, filters_in, 0, DC_DIFFS_LOCATION, 2, priority_level,
            block_offsets, priority_num_blocks
    );
    vp8_loop_filter_simple_vertical_edge_worker(s_base, offsets, pitches,
            &lfi, filters_in, 0, DC_DIFFS_LOCATION, 3, priority_level,
            block_offsets, priority_num_blocks
    );
}

kernel void vp8_loop_filter_simple_horizontal_edges_kernel
(
    global unsigned char *s_base,
    global int *offsets,
    global int *pitches,
    global loop_filter_info_n *lfi_n,
    global int *filters_in,
    int priority_level,
    int num_levels,
    global int *block_offsets,
    global int *priority_num_blocks,
    int frame_type
){

    local loop_filter_info lfi;
    int block = get_global_id(2);
    int block_offset = block_offsets[priority_level];
    int filter_level = filters_in[4*block_offset];
    set_lfi(lfi_n, &lfi, frame_type, filter_level);

    s_base += offsets[block_offsets[priority_level] + block];

    vp8_loop_filter_simple_horizontal_edge_worker(s_base, offsets, pitches, &lfi,
            filters_in, 1, ROWS_LOCATION, 0, priority_level,
            block_offsets, priority_num_blocks
    );
    vp8_loop_filter_simple_horizontal_edge_worker(s_base, offsets, pitches, &lfi,
            filters_in, 0, DC_DIFFS_LOCATION, 1, priority_level,
            block_offsets, priority_num_blocks
    );
    vp8_loop_filter_simple_horizontal_edge_worker(s_base, offsets, pitches, &lfi,
            filters_in, 0, DC_DIFFS_LOCATION, 2, priority_level,
            block_offsets, priority_num_blocks
    );
    vp8_loop_filter_simple_horizontal_edge_worker(s_base, offsets, pitches, &lfi,
            filters_in, 0, DC_DIFFS_LOCATION, 3, priority_level,
            block_offsets, priority_num_blocks
    );
}

kernel void vp8_loop_filter_simple_all_edges_kernel
(
    global unsigned char *s_base,
    global int *offsets,
    global int *pitches,
    global loop_filter_info_n *lfi_n,
    global int *filters_in,
    int priority_level,
    int num_levels,
    global int *block_offsets,
    global int *priority_num_blocks,
    int frame_type
)
{

    int block = (int)get_global_id(2);
    local loop_filter_info lfi;

    int block_offset = block_offsets[priority_level];
    int filter_level = filters_in[4*block_offset + block];
    set_lfi(lfi_n, &lfi, frame_type, filter_level);

    s_base += offsets[block_offsets[priority_level] + block];

    if (block < priority_num_blocks[priority_level]){
        vp8_loop_filter_simple_vertical_edge_worker(s_base, offsets, pitches,
                &lfi, filters_in, 1, COLS_LOCATION, 0, priority_level,
                block_offsets, priority_num_blocks
        );

        //3 Y plane iterations
        vp8_loop_filter_simple_vertical_edge_worker(s_base, offsets, pitches,
                &lfi, filters_in, 0, DC_DIFFS_LOCATION, 1, priority_level,
                block_offsets, priority_num_blocks
        );
        vp8_loop_filter_simple_vertical_edge_worker(s_base, offsets, pitches,
                &lfi, filters_in, 0, DC_DIFFS_LOCATION, 2, priority_level,
                block_offsets, priority_num_blocks
        );
        vp8_loop_filter_simple_vertical_edge_worker(s_base, offsets, pitches,
                &lfi, filters_in, 0, DC_DIFFS_LOCATION, 3, priority_level,
                block_offsets, priority_num_blocks
        );
    }

    barrier(CLK_GLOBAL_MEM_FENCE);

    if (block < priority_num_blocks[priority_level]){
        vp8_loop_filter_simple_horizontal_edge_worker(s_base, offsets, pitches, &lfi,
                filters_in, 1, ROWS_LOCATION, 0, priority_level,
                block_offsets, priority_num_blocks
        );
        vp8_loop_filter_simple_horizontal_edge_worker(s_base, offsets, pitches, &lfi,
                filters_in, 0, DC_DIFFS_LOCATION, 1, priority_level,
                block_offsets, priority_num_blocks
        );
        vp8_loop_filter_simple_horizontal_edge_worker(s_base, offsets, pitches, &lfi,
                filters_in, 0, DC_DIFFS_LOCATION, 2, priority_level,
                block_offsets, priority_num_blocks
        );
        vp8_loop_filter_simple_horizontal_edge_worker(s_base, offsets, pitches, &lfi,
                filters_in, 0, DC_DIFFS_LOCATION, 3, priority_level,
                block_offsets, priority_num_blocks
        );
    }
}

//Inline and non-kernel functions follow.
__inline void vp8_mbfilter_mem(
    signed char mask,
    uchar hev,
    uchar *base
)
{
    char4 u;

    char *pq = (char*)base;
    pq[0] ^= 0x80;
    pq[1] ^= 0x80;
    pq[2] ^= 0x80;
    pq[3] ^= 0x80;
    pq[4] ^= 0x80;
    pq[5] ^= 0x80;

    /* add outer taps if we have high edge variance */
    char vp8_filter = sub_sat(pq[2], pq[5]);
    vp8_filter = clamp(vp8_filter + 3 * (pq[4] - pq[3]), -128, 127);
    vp8_filter &= mask;

    char2 filter = (char2)vp8_filter;
    filter &= (char2)hev;

    /* save bottom 3 bits so that we round one side +4 and the other +3 */
    char2 rounding = {4,3};
    filter = add_sat(filter, rounding);
    filter.s0 >>= 3;
    filter.s1 >>= 3;

    pq[4] = sub_sat(pq[4], filter.s0);
    pq[3] = add_sat(pq[3], filter.s1);

    /* only apply wider filter if not high edge variance */
    filter.s1 = vp8_filter & ~hev;

    /* roughly 3/7th, 2/7th, and 1/7th difference across boundary */
    u.s0 = clamp((63 + filter.s1 * 27) >> 7, -128, 127);
    u.s1 = clamp((63 + filter.s1 * 18) >> 7, -128, 127);
    u.s2 = clamp((63 + filter.s1 * 9) >> 7, -128, 127);
    u.s3 = 0;

    char4 s;
    s = sub_sat(vload4(0, &pq[4]), u);
    pq[4] = s.s0 ^ 0x80;
    pq[5] = s.s1 ^ 0x80;
    pq[6] = s.s2 ^ 0x80;
    pq[7] = s.s3;

    s = add_sat(vload4(0, pq), u.s3210);
    pq[0] = s.s0;
    pq[1] = s.s1 ^ 0x80;
    pq[2] = s.s2 ^ 0x80;
    pq[3] = s.s3 ^ 0x80;
}

__inline uchar8 vp8_mbfilter(
    signed char mask,
    uchar hev,
    uchar8 base
)
{
    char4 u;

    char8 pq = as_char8(base);
    pq ^= (char8){0, 0x80, 0x80, 0x80, 0x80, 0x80, 0x80, 0};

    /* add outer taps if we have high edge variance */
    char vp8_filter = sub_sat(pq.s2, pq.s5);
    vp8_filter = clamp(vp8_filter + 3 * (pq.s4 - pq.s3), -128, 127);
    vp8_filter &= mask;

    char2 filter = (char2)vp8_filter;
    filter &= (char2)hev;

    /* save bottom 3 bits so that we round one side +4 and the other +3 */
    char2 rounding = {4,3};
    filter = add_sat(filter, rounding);
    filter.s0 >>= 3;
    filter.s1 >>= 3;

    pq.s4 = sub_sat(pq.s4, filter.s0);
    pq.s3 = add_sat(pq.s3, filter.s1);

    /* only apply wider filter if not high edge variance */
    filter.s1 = vp8_filter & ~hev;

    /* roughly 3/7th, 2/7th, and 1/7th difference across boundary */
    u.s0 = clamp((63 + filter.s1 * 27) >> 7, -128, 127);
    u.s1 = clamp((63 + filter.s1 * 18) >> 7, -128, 127);
    u.s2 = clamp((63 + filter.s1 * 9) >> 7, -128, 127);
    u.s3 = 0;

    char4 s;
    s = sub_sat(pq.s4567, u);
    pq.s4567 = s ^ (char4){0x80, 0x80, 0x80, 0};
    s = add_sat(pq.s0123, u.s3210);
    pq.s0123 = s ^ (char4){0, 0x80, 0x80, 0x80};

    return as_uchar8(pq);
}

__inline char vp8_hevmask_mem(uchar thresh, uchar *pq){
#if 0
    signed char hev = 0;
    hev  |= (abs(pq[0] - pq[1]) > thresh) * -1;
    hev  |= (abs(pq[3] - pq[2]) > thresh) * -1;
    return hev;
#else
    uchar mask = abs_diff(pq[0], pq[1]) > thresh;
    mask |= abs_diff(pq[3], pq[2]) > thresh;
    return ~mask + 1;
#endif
}

/* is there high variance internal edge ( 11111111 yes, 00000000 no) */
__inline char vp8_hevmask(uchar thresh, uchar4 pq)
{
    return ~any(abs_diff(pq.s03, pq.s12) > (uchar2)thresh) + 1;
}

__inline signed char vp8_filter_mask_mem(uc limit, uc blimit, uchar *pq)
{
    //Only apply the filter if the difference is LESS than 'limit'
    char mask = (abs_diff(pq[0], pq[1]) > limit);
    mask |= (abs_diff(pq[1], pq[2]) > limit);
    mask |= (abs_diff(pq[2], pq[3]) > limit);
    mask |= (abs_diff(pq[5], pq[4]) > limit);
    mask |= (abs_diff(pq[6], pq[5]) > limit);
    mask |= (abs_diff(pq[7], pq[6]) > limit);
    mask |= (abs_diff(pq[3], pq[4]) * 2 + abs_diff(pq[2], pq[5]) / 2  > blimit);
    return mask - 1;
}

/* should we apply any filter at all ( 11111111 yes, 00000000 no) */
__inline signed char vp8_filter_mask(uc limit, uc blimit, uchar8 pq)
{
#if 1
   //Only apply the filter if the difference is LESS than 'limit'
    signed char mask = (abs_diff(pq.s0, pq.s1) > limit);
    mask |= (abs_diff(pq.s1, pq.s2) > limit);
    mask |= (abs_diff(pq.s2, pq.s3) > limit);
    mask |= (abs_diff(pq.s5, pq.s4) > limit);
    mask |= (abs_diff(pq.s6, pq.s5) > limit);
    mask |= (abs_diff(pq.s7, pq.s6) > limit);
    mask |= (abs_diff(pq.s3, pq.s4) * 2 + abs_diff(pq.s2, pq.s5) / 2  > blimit);
    return mask - 1;
#else
	char8 mask8 = abs_diff(pq.s01256700, pq.s12345600) > limit;
	mask8 |= (char8)(abs_diff(pq.s3, pq.s4) * 2 + abs_diff(pq.s2, pq.s5) / 2 > blimit);
	mask8--;
	return any(mask8) ? -1 : 0;
#endif
}

/* should we apply any filter at all ( 11111111 yes, 00000000 no) */
__inline signed char vp8_simple_filter_mask(uc blimit, uc p1, uc p0, uc q0, uc q1)
{
    signed char mask = (abs(p0 - q0) * 2 + abs(p1 - q1) / 2  <= blimit) * -1;
    return mask;
}

__inline void vp8_simple_filter(
    signed char mask,
    global uc *base,
    int op1_off,
    int op0_off,
    int oq0_off,
    int oq1_off
)
{

    global uc *op1 = base + op1_off;
    global uc *op0 = base + op0_off;
    global uc *oq0 = base + oq0_off;
    global uc *oq1 = base + oq1_off;

    signed char vp8_filter;
    char2 filter;

    char4 pq = (char4){*op1, *op0, *oq0, *oq1};
    pq ^= (char4)0x80;

    signed char u;

    vp8_filter = sub_sat(pq.s0, pq.s3);
    vp8_filter = clamp(vp8_filter + 3 * (pq.s2 - pq.s1), -128, 127);
    vp8_filter &= mask;

    /* save bottom 3 bits so that we round one side +4 and the other +3 */
    char2 rounding = {4,3};
    filter = add_sat((char2)vp8_filter, rounding);
    filter.s0 >>= 3;
    filter.s1 >>= 3;

    u = sub_sat(pq.s2, filter.s0);
    *oq0  = u ^ 0x80;

    u = add_sat(pq.s1, filter.s1);
    *op0 = u ^ 0x80;
}

__inline void set_lfi(global loop_filter_info_n *lfi_n, local loop_filter_info *lfi, int frame_type, int filter_level){
    if (get_local_id(0) == 0 && get_local_id(1)==0 && get_local_id(2)==0){
        int hev_index = lfi_n->hev_thr_lut[frame_type][filter_level];
        lfi->mblim = lfi_n->mblim[filter_level][0];
        lfi->blim = lfi_n->blim[filter_level][0];
        lfi->lim = lfi_n->lim[filter_level][0];
        lfi->hev_thr = lfi_n->hev_thr[hev_index][0];
    }
}


libocl: Refine the workgroup functions, add signed info.

Signed-off-by: Junyan He <8f73a735c668918c9613b750d3a88ebf2489599f@linux.intel.com>
Reviewed-by: Yang Rong <78759e37dc7114caed18f74e7515c5cb519dbf6d@intel.com>

/*
 * Copyright © 2012 - 2014 Intel Corporation
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library. If not, see <http://www.gnu.org/licenses/>.
 *
 */
#include "ocl_work_group.h"

int __gen_ocl_work_group_all(int predicate);
int work_group_all(int predicate) {
  return __gen_ocl_work_group_all(predicate);
}

int __gen_ocl_work_group_any(int predicate);
int work_group_any(int predicate) {
  return __gen_ocl_work_group_any(predicate);
}

/* broadcast */
#define BROADCAST_IMPL(GEN_TYPE) \
    OVERLOADABLE GEN_TYPE __gen_ocl_work_group_broadcast(GEN_TYPE a, size_t local_id); \
    OVERLOADABLE GEN_TYPE work_group_broadcast(GEN_TYPE a, size_t local_id) { \
      return __gen_ocl_work_group_broadcast(a, local_id); \
    } \
    OVERLOADABLE GEN_TYPE __gen_ocl_work_group_broadcast(GEN_TYPE a, size_t local_id_x, size_t local_id_y); \
    OVERLOADABLE GEN_TYPE work_group_broadcast(GEN_TYPE a, size_t local_id_x, size_t local_id_y) { \
      return __gen_ocl_work_group_broadcast(a, local_id_x, local_id_y);  \
    } \
    OVERLOADABLE GEN_TYPE __gen_ocl_work_group_broadcast(GEN_TYPE a, size_t local_id_x, size_t local_id_y, size_t local_id_z); \
    OVERLOADABLE GEN_TYPE work_group_broadcast(GEN_TYPE a, size_t local_id_x, size_t local_id_y, size_t local_id_z) { \
      return __gen_ocl_work_group_broadcast(a, local_id_x, local_id_y, local_id_z); \
    }

BROADCAST_IMPL(int)
BROADCAST_IMPL(uint)
BROADCAST_IMPL(long)
BROADCAST_IMPL(ulong)
BROADCAST_IMPL(float)
BROADCAST_IMPL(double)
#undef BROADCAST_IMPL

#define RANGE_OP(RANGE, OP, GEN_TYPE, SIGN) \
    OVERLOADABLE GEN_TYPE __gen_ocl_work_group_##RANGE##_##OP(bool sign, GEN_TYPE x); \
    OVERLOADABLE GEN_TYPE work_group_##RANGE##_##OP(GEN_TYPE x) { \
      return __gen_ocl_work_group_##RANGE##_##OP(SIGN, x);  \
    }

/* reduce add */
RANGE_OP(reduce, add, int, true)
RANGE_OP(reduce, add, uint, false)
RANGE_OP(reduce, add, long, true)
RANGE_OP(reduce, add, ulong, false)
RANGE_OP(reduce, add, float, true)
RANGE_OP(reduce, add, double, true)
/* reduce min */
RANGE_OP(reduce, min, int, true)
RANGE_OP(reduce, min, uint, false)
RANGE_OP(reduce, min, long, true)
RANGE_OP(reduce, min, ulong, false)
RANGE_OP(reduce, min, float, true)
RANGE_OP(reduce, min, double, true)
/* reduce max */
RANGE_OP(reduce, max, int, true)
RANGE_OP(reduce, max, uint, false)
RANGE_OP(reduce, max, long, true)
RANGE_OP(reduce, max, ulong, false)
RANGE_OP(reduce, max, float, true)
RANGE_OP(reduce, max, double, true)

/* scan_inclusive add */
RANGE_OP(scan_inclusive, add, int, true)
RANGE_OP(scan_inclusive, add, uint, false)
RANGE_OP(scan_inclusive, add, long, true)
RANGE_OP(scan_inclusive, add, ulong, false)
RANGE_OP(scan_inclusive, add, float, true)
RANGE_OP(scan_inclusive, add, double, true)
/* scan_inclusive min */
RANGE_OP(scan_inclusive, min, int, true)
RANGE_OP(scan_inclusive, min, uint, false)
RANGE_OP(scan_inclusive, min, long, true)
RANGE_OP(scan_inclusive, min, ulong, false)
RANGE_OP(scan_inclusive, min, float, true)
RANGE_OP(scan_inclusive, min, double, true)
/* scan_inclusive max */
RANGE_OP(scan_inclusive, max, int, true)
RANGE_OP(scan_inclusive, max, uint, false)
RANGE_OP(scan_inclusive, max, long, true)
RANGE_OP(scan_inclusive, max, ulong, false)
RANGE_OP(scan_inclusive, max, float, true)
RANGE_OP(scan_inclusive, max, double, true)

/* scan_exclusive add */
RANGE_OP(scan_exclusive, add, int, true)
RANGE_OP(scan_exclusive, add, uint, false)
RANGE_OP(scan_exclusive, add, long, true)
RANGE_OP(scan_exclusive, add, ulong, false)
RANGE_OP(scan_exclusive, add, float, true)
RANGE_OP(scan_exclusive, add, double, true)
/* scan_exclusive min */
RANGE_OP(scan_exclusive, min, int, true)
RANGE_OP(scan_exclusive, min, uint, false)
RANGE_OP(scan_exclusive, min, long, true)
RANGE_OP(scan_exclusive, min, ulong, false)
RANGE_OP(scan_exclusive, min, float, true)
RANGE_OP(scan_exclusive, min, double, true)
/* scan_exclusive max */
RANGE_OP(scan_exclusive, max, int, true)
RANGE_OP(scan_exclusive, max, uint, false)
RANGE_OP(scan_exclusive, max, long, true)
RANGE_OP(scan_exclusive, max, ulong, false)
RANGE_OP(scan_exclusive, max, float, true)
RANGE_OP(scan_exclusive, max, double, true)

#undef RANGE_OP

/*
 * Copyright © 2012 - 2014 Intel Corporation
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library. If not, see <http://www.gnu.org/licenses/>.
 *
 */
#include "ocl_work_group.h"

int __gen_ocl_work_group_all(int predicate);
int work_group_all(int predicate) {
  return __gen_ocl_work_group_all(predicate);
}

int __gen_ocl_work_group_any(int predicate);
int work_group_any(int predicate) {
  return __gen_ocl_work_group_any(predicate);
}

/* broadcast */
#define BROADCAST_IMPL(GEN_TYPE) \
    OVERLOADABLE GEN_TYPE __gen_ocl_work_group_broadcast(GEN_TYPE a, size_t local_id); \
    OVERLOADABLE GEN_TYPE work_group_broadcast(GEN_TYPE a, size_t local_id) { \
      return __gen_ocl_work_group_broadcast(a, local_id); \
    } \
    OVERLOADABLE GEN_TYPE __gen_ocl_work_group_broadcast(GEN_TYPE a, size_t local_id_x, size_t local_id_y); \
    OVERLOADABLE GEN_TYPE work_group_broadcast(GEN_TYPE a, size_t local_id_x, size_t local_id_y) { \
      return __gen_ocl_work_group_broadcast(a, local_id_x, local_id_y);  \
    } \
    OVERLOADABLE GEN_TYPE __gen_ocl_work_group_broadcast(GEN_TYPE a, size_t local_id_x, size_t local_id_y, size_t local_id_z); \
    OVERLOADABLE GEN_TYPE work_group_broadcast(GEN_TYPE a, size_t local_id_x, size_t local_id_y, size_t local_id_z) { \
      return __gen_ocl_work_group_broadcast(a, local_id_x, local_id_y, local_id_z); \
    }

BROADCAST_IMPL(int)
BROADCAST_IMPL(uint)
BROADCAST_IMPL(long)
BROADCAST_IMPL(ulong)
BROADCAST_IMPL(float)
BROADCAST_IMPL(double)
#undef BROADCAST_IMPL

#define RANGE_OP(RANGE, OP, GEN_TYPE) \
    OVERLOADABLE GEN_TYPE __gen_ocl_work_group_##RANGE##_##OP(GEN_TYPE x); \
    OVERLOADABLE GEN_TYPE work_group_##RANGE##_##OP(GEN_TYPE x) { \
      return __gen_ocl_work_group_##RANGE##_##OP(x);  \
    }

/* reduce add */
RANGE_OP(reduce, add, int)
RANGE_OP(reduce, add, uint)
RANGE_OP(reduce, add, long)
RANGE_OP(reduce, add, ulong)
RANGE_OP(reduce, add, float)
RANGE_OP(reduce, add, double)
/* reduce min */
RANGE_OP(reduce, min, int)
RANGE_OP(reduce, min, uint)
RANGE_OP(reduce, min, long)
RANGE_OP(reduce, min, ulong)
RANGE_OP(reduce, min, float)
RANGE_OP(reduce, min, double)
/* reduce max */
RANGE_OP(reduce, max, int)
RANGE_OP(reduce, max, uint)
RANGE_OP(reduce, max, long)
RANGE_OP(reduce, max, ulong)
RANGE_OP(reduce, max, float)
RANGE_OP(reduce, max, double)

/* scan_inclusive add */
RANGE_OP(scan_inclusive, add, int)
RANGE_OP(scan_inclusive, add, uint)
RANGE_OP(scan_inclusive, add, long)
RANGE_OP(scan_inclusive, add, ulong)
RANGE_OP(scan_inclusive, add, float)
RANGE_OP(scan_inclusive, add, double)
/* scan_inclusive min */
RANGE_OP(scan_inclusive, min, int)
RANGE_OP(scan_inclusive, min, uint)
RANGE_OP(scan_inclusive, min, long)
RANGE_OP(scan_inclusive, min, ulong)
RANGE_OP(scan_inclusive, min, float)
RANGE_OP(scan_inclusive, min, double)
/* scan_inclusive max */
RANGE_OP(scan_inclusive, max, int)
RANGE_OP(scan_inclusive, max, uint)
RANGE_OP(scan_inclusive, max, long)
RANGE_OP(scan_inclusive, max, ulong)
RANGE_OP(scan_inclusive, max, float)
RANGE_OP(scan_inclusive, max, double)

/* scan_exclusive add */
RANGE_OP(scan_exclusive, add, int)
RANGE_OP(scan_exclusive, add, uint)
RANGE_OP(scan_exclusive, add, long)
RANGE_OP(scan_exclusive, add, ulong)
RANGE_OP(scan_exclusive, add, float)
RANGE_OP(scan_exclusive, add, double)
/* scan_exclusive min */
RANGE_OP(scan_exclusive, min, int)
RANGE_OP(scan_exclusive, min, uint)
RANGE_OP(scan_exclusive, min, long)
RANGE_OP(scan_exclusive, min, ulong)
RANGE_OP(scan_exclusive, min, float)
RANGE_OP(scan_exclusive, min, double)
/* scan_exclusive max */
RANGE_OP(scan_exclusive, max, int)
RANGE_OP(scan_exclusive, max, uint)
RANGE_OP(scan_exclusive, max, long)
RANGE_OP(scan_exclusive, max, ulong)
RANGE_OP(scan_exclusive, max, float)
RANGE_OP(scan_exclusive, max, double)

#undef RANGE_OP


[Builtins] Cleanup unused code

[Builtins] Cleanup unused code

__kernel void
org_khronos_openvx_scale_image_nn_u8 (
    global const unsigned char *__restrict input,
    global unsigned char *__restrict output, float width_scale,
    float height_scale, int input_width, int input_height)
{
  int x = get_global_id (0);
  int y = get_global_id (1);
  int z = get_global_id (2);
  int num_planes = get_global_size (2);

  float x_src = ((float)x + 0.5f) * width_scale - 0.5f;
  float y_src = ((float)y + 0.5f) * height_scale - 0.5f;
  float x_min = floor (x_src);
  float y_min = floor (y_src);

  int x1 = (int)x_min;
  int y1 = (int)y_min;

  if (x_src - x_min >= 0.5f)
    x1++;
  if (y_src - y_min >= 0.5f)
    y1++;

  unsigned char result = input[num_planes * (x1 * input_width + y1) + z];

  output[num_planes * (x * get_global_size (0) + y) + z] = result;
}

__kernel void
org_khronos_openvx_scale_image_bl_u8 (
    global const unsigned char *__restrict input,
    global unsigned char *__restrict output, float width_scale,
    float height_scale, int input_width, int input_height)
{
  size_t planes = get_global_size (2);
  size_t x = get_global_id (0);
  size_t y = get_global_id (1);
  size_t plane = get_global_id (2);

  int input_size = input_width * input_height;
  int output_width = get_global_size(0);
  int output_height = get_global_size(1);
  int output_size = output_width * output_height;

  float x_src = ((float)x + 0.5f) * width_scale - 0.5f;
  float y_src = ((float)y + 0.5f) * height_scale - 0.5f;

  int x_min = floor (x_src);
  int y_min = floor (y_src);

  float s = x_src - x_min;
  float t = y_src - y_min;

  float result
      = (1 - s) * (1 - t)
            * input[plane*input_width*input_height + y_min * input_width + x_min]
        + s * (1 - t)
              * input[plane*input_width*input_height + (y_min + 1) * input_width + x_min]
        + (1 - s) * t
              * input[plane*input_width*input_height + y_min * input_width + x_min + 1]
        + s * t
              * input[plane*input_width*input_height + (y_min + 1) * input_width + x_min + 1];

  output[plane*output_width*output_height + y*output_width + x]
      = (unsigned char)result;
}

__kernel void
pocl_add_i8 (global const signed char *__restrict a,
             global const signed char *__restrict b,
             global signed char *__restrict output)
{
  size_t x = get_global_id (0);

  output[x] = a[x] + b[x];
}

__kernel void
org_khronos_openvx_tensor_convert_depth_wrap_u8_f32 (
            global const unsigned char *__restrict input,
            global float *__restrict output,
            float norm, float offset)
{
  int x = get_global_id(0);
  int y = get_global_id(1);
  int z = get_global_id(2);
  int width = get_global_size(0);
  int height = get_global_size(1);
  int idx = z*width*height + y*width + x;
  output[idx] = (input[idx] - offset) / norm;
}

__kernel void
org_khronos_openvx_scale_image_nn_u8 (
    global const unsigned char *__restrict input,
    global unsigned char *__restrict output, float width_scale,
    float height_scale, int input_width, int input_height)
{
  int x = get_global_id (0);
  int y = get_global_id (1);
  int z = get_global_id (2);
  int num_planes = get_global_size (2);
  // printf("x=%d,y=%d",x,y);

  float x_src = ((float)x + 0.5f) * width_scale - 0.5f;
  float y_src = ((float)y + 0.5f) * height_scale - 0.5f;
  // printf("x_s=%f,y_s=%f",x_src,y_src);
  float x_min = floor (x_src);
  float y_min = floor (y_src);
  // printf("x_m=%f,y_m=%f",x_min,y_min);

  int x1 = (int)x_min;
  int y1 = (int)y_min;
  // printf("x1=%d,y1=%d",x1,y1);

  if (x_src - x_min >= 0.5f)
    x1++;
  if (y_src - y_min >= 0.5f)
    y1++;

  unsigned char result = input[num_planes * (x1 * input_width + y1) + z];
  // printf("x1=%d,y1=%d",x1,y1);

  // printf("result=%d",result);

  output[num_planes * (x * get_global_size (0) + y) + z] = result;

  // for(int i =0;i<9;i++) {
  //  printf("input value %d\n",input[i]);
  //}
}

__kernel void
org_khronos_openvx_scale_image_bl_u8 (
    global const unsigned char *__restrict input,
    global unsigned char *__restrict output, float width_scale,
    float height_scale, int input_width, int input_height)
{
  size_t planes = get_global_size (2);
  size_t x = get_global_id (0);
  size_t y = get_global_id (1);
  size_t plane = get_global_id (2);

  // printf("x=%d,y=%d",x,y);
  int input_size = input_width * input_height;
  int output_width = get_global_size(0);
  int output_height = get_global_size(1);
  int output_size = output_width * output_height;

  float x_src = ((float)x + 0.5f) * width_scale - 0.5f;
  float y_src = ((float)y + 0.5f) * height_scale - 0.5f;
  // printf("x_s=%f,y_s=%f",x_src,y_src);
  int x_min = floor (x_src);
  int y_min = floor (y_src);
  // printf("x_m=%f,y_m=%f",x_min,y_min);
  // if (x_min <= 1) x_min = 1;
  // if (x_min >= input_width-1) x_min = input_width - 1;
  // if (y_min <= 1) y_min = 1;
  // if (y_min >= input_height-1) y_min = input_height - 1;

  float s = x_src - x_min;
  float t = y_src - y_min;

  // float result
  //     = (1 - s) * (1 - t)
  //           * input[planes * (y_min * input_width + x_min) + plane]
  //       + s * (1 - t)
  //             * input[planes * ((y_min + 1) * input_width + x_min) + plane]
  //       + (1 - s) * t
  //             * input[planes * (y_min * input_width + x_min + 1) + plane]
  //       + s * t
  //             * input[planes * ((y_min + 1) * input_width + x_min + 1)
  //                     + plane];
  // // printf("x1=%d,y1=%d",x1,y1);

  // // printf("result=%d",result);

  // output[planes * (y * get_global_size (0) + x) + plane]
  //     = (unsigned char)result;

  float result
      = (1 - s) * (1 - t)
            * input[plane*input_width*input_height + y_min * input_width + x_min]
        + s * (1 - t)
              * input[plane*input_width*input_height + (y_min + 1) * input_width + x_min]
        + (1 - s) * t
              * input[plane*input_width*input_height + y_min * input_width + x_min + 1]
        + s * t
              * input[plane*input_width*input_height + (y_min + 1) * input_width + x_min + 1];
  // printf("x1=%d,y1=%d",x1,y1);

  // printf("result=%d",result);

  output[plane*output_width*output_height + y*output_width + x]
      = (unsigned char)result;

  // printf("%hhu", (unsigned char)result);
  // for(int i =0;i<9;i++) {
  //  printf("input value %d\n",input[i]);
  //}
}

__kernel void
pocl_add_i8 (global const signed char *__restrict a,
             global const signed char *__restrict b,
             global signed char *__restrict output)
{
  size_t x = get_global_id (0);

  output[x] = a[x] + b[x];
}

__kernel void
org_khronos_openvx_tensor_convert_depth_wrap_u8_f32 (
            global const unsigned char *__restrict input,
            global float *__restrict output,
            float norm, float offset)
{
  int x = get_global_id(0);
  int y = get_global_id(1);
  int z = get_global_id(2);
  int width = get_global_size(0);
  int height = get_global_size(1);
  int idx = z*width*height + y*width + x;
  output[idx] = (input[idx] - offset) / norm;
  //printf("o=%f,n=%f",offset,norm);
}

__kernel void
org_khronos_openvx_tensor_transpose_u8 (
  global const unsigned char *__restrict input,
  global unsigned char *__restrict output,
  int dim1, int dim2)
  {
    //size_t input_idx = get_global_linear_id();

  }