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