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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_o, q11
alias n16x16_ol, q11_l
alias n16x16_oh, q11_h
alias y32x16_el, q12
alias y32x16_eh, q13
alias y32x16_ol, q14
alias y32x16_oh, q15
alias y16x16_e, q12
alias y16x16_el, q12_l
alias y16x16_eh, q12_h
alias y16x16_o, q13
alias y16x16_ol, q13_l
alias y16x16_oh, q13_h
alias y8x16, y16x16_e
.macro init src
// load s32x3x3, narrow to s16x3x3
vld3.i32 {q13_l, q14_l, q15_l}, [\src]!
vld3.i32 {q13_h[0], q14_h[0], q15_h[0]}, [\src]
vmovn.i32 CO_R, q13
vmovn.i32 CO_G, q14
vmovn.i32 CO_B, q15
vmov.u8 BIAS_Y, #16
vmov.u8 BIAS_U, #128
.endm
.macro compute_y_16x1_step action, s8x16, coeff
vmov.u8 n16x16_o, #0
vtrn.u8 \s8x16, n16x16_o
\action y32x16_el, \s8x16\()_l, \coeff
\action y32x16_eh, \s8x16\()_h, \coeff
\action y32x16_ol, n16x16_ol, \coeff
\action y32x16_oh, n16x16_oh, \coeff
.endm
/*
* in: r8x16, g8x16, b8x16
* out: y8x16
* clobber: q11-q15, r8x16, g8x16, b8x16
*/
.macro compute_y_16x1
compute_y_16x1_step vmull, r8x16, CO_RY
compute_y_16x1_step vmlal, g8x16, CO_GY
compute_y_16x1_step vmlal, b8x16, CO_BY
vrshrn.i32 y16x16_el, y32x16_el, #15
vrshrn.i32 y16x16_eh, y32x16_eh, #15
vrshrn.i32 y16x16_ol, y32x16_ol, #15
vrshrn.i32 y16x16_oh, y32x16_oh, #15
vtrn.8 y16x16_e, y16x16_o
vadd.u8 y8x16, y8x16, BIAS_Y
.endm
alias c32x8_l, q14
alias c32x8_h, q15
alias_qw c16x8, q13
alias_qw c8x8x2, q10
.macro compute_chroma_8x1_step action, s16x8, coeff
\action c32x8_l, \s16x8\()_l, \coeff
\action c32x8_h, \s16x8\()_h, \coeff
.endm
/*
* in: r16x8, g16x8, b16x8
* out: c8x8
* clobber: q14-q15
*/
.macro compute_chroma_8x1 c, C
compute_chroma_8x1_step vmull, r16x8, CO_R\C
compute_chroma_8x1_step vmlal, g16x8, CO_G\C
compute_chroma_8x1_step vmlal, b16x8, CO_B\C
vrshrn.i32 c16x8_l, c32x8_l, #15
vrshrn.i32 c16x8_h, c32x8_h, #15
vmovn.i16 \c\()8x8, c16x8
vadd.u8 \c\()8x8, \c\()8x8, BIAS_\C
.endm
loop_420sp rgbx, nv12, init, kernel_420_16x2, 32
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