/*
* Copyright (c) Alexandra Hajkova
*
* This file is part of FFmpeg.
*
* FFmpeg 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.
*
* FFmpeg 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 FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
static void FUNC(ff_hevc_idct_4x4, BIT_DEPTH)(int16_t *coeffs, int col_limit)
{
const int shift = 7;
const int shift2 = 20 - BIT_DEPTH;
vec_s16 src_01, src_23;
vec_s32 res[4];
vec_s16 res_packed[2];
src_01 = vec_ld(0, coeffs);
src_23 = vec_ld(16, coeffs);
transform4x4(src_01, src_23, res, shift, coeffs);
src_01 = vec_packs(res[0], res[1]);
src_23 = vec_packs(res[2], res[3]);
scale(res, res_packed, shift);
// transpose
src_01 = vec_perm(res_packed[0], res_packed[1], mask[0]);
src_23 = vec_perm(res_packed[0], res_packed[1], mask[1]);
transform4x4(src_01, src_23, res, shift2, coeffs);
scale(res, res_packed, shift2);
// transpose
src_01 = vec_perm(res_packed[0], res_packed[1], mask[0]);
src_23 = vec_perm(res_packed[0], res_packed[1], mask[1]);
vec_st(src_01, 0, coeffs);
vec_st(src_23, 16, coeffs);
}