/*
 * Copyright (c) 2015 Henrik Gramner
 *
 * This file is part of Libav.
 *
 * Libav is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * Libav 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License along
 * with Libav; if not, write to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 */

#include <string.h>
#include "checkasm.h"
#include "libavcodec/h264qpel.h"
#include "libavutil/common.h"
#include "libavutil/intreadwrite.h"

static const uint32_t pixel_mask[3] = { 0xffffffff, 0x01ff01ff, 0x03ff03ff };

#define SIZEOF_PIXEL ((bit_depth + 7) / 8)
#define BUF_SIZE (2*16*(16+3+4))

#define randomize_buffers()\
    do {\
        uint32_t mask = pixel_mask[bit_depth-8];\
        int k;\
        for (k = 0; k < BUF_SIZE; k += 4) {\
            uint32_t r = rnd() & mask;\
            AV_WN32A(buf0+k, r);\
            AV_WN32A(buf1+k, r);\
            r = rnd();\
            AV_WN32A(dst0+k, r);\
            AV_WN32A(dst1+k, r);\
        }\
    } while (0)

#define src0 (buf0 + 3*2*16) /* h264qpel functions read data from negative src pointer offsets */
#define src1 (buf1 + 3*2*16)

void checkasm_check_h264qpel(void)
{
    DECLARE_ALIGNED(16, uint8_t, buf0)[BUF_SIZE];
    DECLARE_ALIGNED(16, uint8_t, buf1)[BUF_SIZE];
    DECLARE_ALIGNED(16, uint8_t, dst0)[BUF_SIZE];
    DECLARE_ALIGNED(16, uint8_t, dst1)[BUF_SIZE];
    H264QpelContext h;
    int op, bit_depth, i, j;

    for (op = 0; op < 2; op++) {
        qpel_mc_func (*tab)[16] = op ? h.avg_h264_qpel_pixels_tab : h.put_h264_qpel_pixels_tab;
        const char *op_name = op ? "avg" : "put";

        for (bit_depth = 8; bit_depth <= 10; bit_depth++) {
            ff_h264qpel_init(&h, bit_depth);
            for (i = 0; i < (op ? 3 : 4); i++) {
                int size = 16 >> i;
                for (j = 0; j < 16; j++) {
                    if (check_func(tab[i][j], "%s_h264_qpel_%d_mc%d%d_%d", op_name, size, j&3, j>>2, bit_depth)) {
                        randomize_buffers();
                        call_ref(dst0, src0, (ptrdiff_t)size*SIZEOF_PIXEL);
                        call_new(dst1, src1, (ptrdiff_t)size*SIZEOF_PIXEL);
                        if (memcmp(buf0, buf1, BUF_SIZE) || memcmp(dst0, dst1, BUF_SIZE))
                            fail();
                        bench_new(dst1, src1, (ptrdiff_t)size*SIZEOF_PIXEL);
                    }
                }
            }
        }
        report("%s_h264_qpel", op_name);
    }
}