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/* | |
* 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); | |
} | |