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/*
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* Copyright (C) 2013 Xiaolei Yu <dreifachstein@gmail.com>
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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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#include "config.h"
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#if HAVE_AS_DN_DIRECTIVE
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#include "rgb2yuv_neon_common.S"
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/* downsampled R16G16B16 x8 */
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alias_qw r16x8, q7
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alias_qw g16x8, q8
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alias_qw b16x8, q9
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alias n16x16_l, q11
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alias n16x16_h, q12
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alias y16x16_l, q13
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alias y16x16_h, q14
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alias_qw y8x16, q15
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.macro init src
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vld3.i32 {q13_l, q14_l, q15_l}, [\src]!
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vld3.i32 {q13_h[0], q14_h[0], q15_h[0]}, [\src]
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vrshrn.i32 CO_R, q13, #7
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vrshrn.i32 CO_G, q14, #7
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vrshrn.i32 CO_B, q15, #7
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vmov.u8 BIAS_Y, #16
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vmov.u8 BIAS_U, #128
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.endm
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.macro compute_y_16x1_step action, s8x16, coeff
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vmovl.u8 n16x16_l, \s8x16\()_l
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vmovl.u8 n16x16_h, \s8x16\()_h
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\action y16x16_l, n16x16_l, \coeff
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\action y16x16_h, n16x16_h, \coeff
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.endm
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.macro compute_y_16x1
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compute_y_16x1_step vmul, r8x16, CO_RY
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compute_y_16x1_step vmla, g8x16, CO_GY
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compute_y_16x1_step vmla, b8x16, CO_BY
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vrshrn.i16 y8x16_l, y16x16_l, #8
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vrshrn.i16 y8x16_h, y16x16_h, #8
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vadd.u8 y8x16, y8x16, BIAS_Y
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.endm
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alias c16x8, q15
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alias_qw c8x8x2, q10
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.macro compute_chroma_8x1 c, C
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vmul c16x8, r16x8, CO_R\C
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vmla c16x8, g16x8, CO_G\C
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vmla c16x8, b16x8, CO_B\C
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vrshrn.i16 \c\()8x8, c16x8, #8
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vadd.u8 \c\()8x8, \c\()8x8, BIAS_\C
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.endm
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loop_420sp rgbx, nv12, init, kernel_420_16x2, 16
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#endif
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