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48 lines
1.7 KiB
48 lines
1.7 KiB
/* |
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* Copyright (c) Alexandra Hajkova |
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* |
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* This file is part of Libav. |
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* |
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* Libav 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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* Libav 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 Libav; 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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