49 lines
1.7 KiB
C
49 lines
1.7 KiB
C
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/*
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* Copyright (c) Alexandra Hajkova
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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static void FUNC(ff_hevc_idct_4x4, BIT_DEPTH)(int16_t *coeffs, int col_limit)
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{
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const int shift = 7;
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const int shift2 = 20 - BIT_DEPTH;
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vec_s16 src_01, src_23;
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vec_s32 res[4];
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vec_s16 res_packed[2];
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src_01 = vec_ld(0, coeffs);
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src_23 = vec_ld(16, coeffs);
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transform4x4(src_01, src_23, res, shift, coeffs);
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src_01 = vec_packs(res[0], res[1]);
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src_23 = vec_packs(res[2], res[3]);
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scale(res, res_packed, shift);
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// transpose
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src_01 = vec_perm(res_packed[0], res_packed[1], mask[0]);
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src_23 = vec_perm(res_packed[0], res_packed[1], mask[1]);
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transform4x4(src_01, src_23, res, shift2, coeffs);
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scale(res, res_packed, shift2);
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// transpose
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src_01 = vec_perm(res_packed[0], res_packed[1], mask[0]);
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src_23 = vec_perm(res_packed[0], res_packed[1], mask[1]);
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vec_st(src_01, 0, coeffs);
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vec_st(src_23, 16, coeffs);
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}
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