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/*
* Copyright (c) 2016 Matthieu Bouron <matthieu.bouron stupeflix.com>
* Copyright (c) 2016 Clément Bœsch <clement stupeflix.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 "libavutil/aarch64/asm.S"
.macro load_yoff_ycoeff yoff ycoeff
#if defined(__APPLE__)
ldp w9, w10, [sp, #\yoff]
#else
ldr w9, [sp, #\yoff]
ldr w10, [sp, #\ycoeff]
#endif
.endm
.macro load_args_nv12
ldr x8, [sp] // table
load_yoff_ycoeff 8, 16 // y_offset, y_coeff
ld1 {v1.1D}, [x8]
dup v0.8H, w10
dup v3.8H, w9
sub w3, w3, w0, lsl #2 // w3 = linesize - width * 4 (padding)
sub w5, w5, w0 // w5 = linesizeY - width (paddingY)
sub w7, w7, w0 // w7 = linesizeC - width (paddingC)
neg w11, w0
.endm
.macro load_args_nv21
load_args_nv12
.endm
.macro load_args_yuv420p
ldr x13, [sp] // srcV
ldr w14, [sp, #8] // linesizeV
ldr x8, [sp, #16] // table
load_yoff_ycoeff 24, 32 // y_offset, y_coeff
ld1 {v1.1D}, [x8]
dup v0.8H, w10
dup v3.8H, w9
sub w3, w3, w0, lsl #2 // w3 = linesize - width * 4 (padding)
sub w5, w5, w0 // w5 = linesizeY - width (paddingY)
sub w7, w7, w0, lsr #1 // w7 = linesizeU - width / 2 (paddingU)
sub w14, w14, w0, lsr #1 // w14 = linesizeV - width / 2 (paddingV)
lsr w11, w0, #1
neg w11, w11
.endm
.macro load_args_yuv422p
ldr x13, [sp] // srcV
ldr w14, [sp, #8] // linesizeV
ldr x8, [sp, #16] // table
load_yoff_ycoeff 24, 32 // y_offset, y_coeff
ld1 {v1.1D}, [x8]
dup v0.8H, w10
dup v3.8H, w9
sub w3, w3, w0, lsl #2 // w3 = linesize - width * 4 (padding)
sub w5, w5, w0 // w5 = linesizeY - width (paddingY)
sub w7, w7, w0, lsr #1 // w7 = linesizeU - width / 2 (paddingU)
sub w14, w14, w0, lsr #1 // w14 = linesizeV - width / 2 (paddingV)
.endm
.macro load_chroma_nv12
ld2 {v16.8B, v17.8B}, [x6], #16
ushll v18.8H, v16.8B, #3
ushll v19.8H, v17.8B, #3
.endm
.macro load_chroma_nv21
ld2 {v16.8B, v17.8B}, [x6], #16
ushll v19.8H, v16.8B, #3
ushll v18.8H, v17.8B, #3
.endm
.macro load_chroma_yuv420p
ld1 {v16.8B}, [ x6], #8
ld1 {v17.8B}, [x13], #8
ushll v18.8H, v16.8B, #3
ushll v19.8H, v17.8B, #3
.endm
.macro load_chroma_yuv422p
load_chroma_yuv420p
.endm
.macro increment_nv12
ands w15, w1, #1
csel w16, w7, w11, ne // incC = (h & 1) ? paddincC : -width
add x6, x6, w16, SXTW // srcC += incC
.endm
.macro increment_nv21
increment_nv12
.endm
.macro increment_yuv420p
ands w15, w1, #1
csel w16, w7, w11, ne // incU = (h & 1) ? paddincU : -width/2
csel w17, w14, w11, ne // incV = (h & 1) ? paddincV : -width/2
add x6, x6, w16, SXTW // srcU += incU
add x13, x13, w17, SXTW // srcV += incV
.endm
.macro increment_yuv422p
add x6, x6, w7, SXTW // srcU += incU
add x13, x13, w14, SXTW // srcV += incV
.endm
.macro compute_rgba r1 g1 b1 a1 r2 g2 b2 a2
add v20.8H, v26.8H, v20.8H // Y1 + R1
add v21.8H, v27.8H, v21.8H // Y2 + R2
add v22.8H, v26.8H, v22.8H // Y1 + G1
add v23.8H, v27.8H, v23.8H // Y2 + G2
add v24.8H, v26.8H, v24.8H // Y1 + B1
add v25.8H, v27.8H, v25.8H // Y2 + B2
sqrshrun \r1, v20.8H, #1 // clip_u8((Y1 + R1) >> 1)
sqrshrun \r2, v21.8H, #1 // clip_u8((Y2 + R1) >> 1)
sqrshrun \g1, v22.8H, #1 // clip_u8((Y1 + G1) >> 1)
sqrshrun \g2, v23.8H, #1 // clip_u8((Y2 + G1) >> 1)
sqrshrun \b1, v24.8H, #1 // clip_u8((Y1 + B1) >> 1)
sqrshrun \b2, v25.8H, #1 // clip_u8((Y2 + B1) >> 1)
movi \a1, #255
movi \a2, #255
.endm
.macro declare_func ifmt ofmt
function ff_\ifmt\()_to_\ofmt\()_neon, export=1
load_args_\ifmt
1:
mov w8, w0 // w8 = width
2:
movi v5.8H, #4, lsl #8 // 128 * (1<<3)
load_chroma_\ifmt
sub v18.8H, v18.8H, v5.8H // U*(1<<3) - 128*(1<<3)
sub v19.8H, v19.8H, v5.8H // V*(1<<3) - 128*(1<<3)
sqdmulh v20.8H, v19.8H, v1.H[0] // V * v2r (R)
sqdmulh v22.8H, v18.8H, v1.H[1] // U * u2g
sqdmulh v19.8H, v19.8H, v1.H[2] // V * v2g
add v22.8H, v22.8H, v19.8H // U * u2g + V * v2g (G)
sqdmulh v24.8H, v18.8H, v1.H[3] // U * u2b (B)
zip2 v21.8H, v20.8H, v20.8H // R2
zip1 v20.8H, v20.8H, v20.8H // R1
zip2 v23.8H, v22.8H, v22.8H // G2
zip1 v22.8H, v22.8H, v22.8H // G1
zip2 v25.8H, v24.8H, v24.8H // B2
zip1 v24.8H, v24.8H, v24.8H // B1
ld1 {v2.16B}, [x4], #16 // load luma
ushll v26.8H, v2.8B, #3 // Y1*(1<<3)
ushll2 v27.8H, v2.16B, #3 // Y2*(1<<3)
sub v26.8H, v26.8H, v3.8H // Y1*(1<<3) - y_offset
sub v27.8H, v27.8H, v3.8H // Y2*(1<<3) - y_offset
sqdmulh v26.8H, v26.8H, v0.8H // ((Y1*(1<<3) - y_offset) * y_coeff) >> 15
sqdmulh v27.8H, v27.8H, v0.8H // ((Y2*(1<<3) - y_offset) * y_coeff) >> 15
.ifc \ofmt,argb // 1 2 3 0
compute_rgba v5.8B,v6.8B,v7.8B,v4.8B, v17.8B,v18.8B,v19.8B,v16.8B
.endif
.ifc \ofmt,rgba // 0 1 2 3
compute_rgba v4.8B,v5.8B,v6.8B,v7.8B, v16.8B,v17.8B,v18.8B,v19.8B
.endif
.ifc \ofmt,abgr // 3 2 1 0
compute_rgba v7.8B,v6.8B,v5.8B,v4.8B, v19.8B,v18.8B,v17.8B,v16.8B
.endif
.ifc \ofmt,bgra // 2 1 0 3
compute_rgba v6.8B,v5.8B,v4.8B,v7.8B, v18.8B,v17.8B,v16.8B,v19.8B
.endif
st4 { v4.8B, v5.8B, v6.8B, v7.8B}, [x2], #32
st4 {v16.8B,v17.8B,v18.8B,v19.8B}, [x2], #32
subs w8, w8, #16 // width -= 16
b.gt 2b
add x2, x2, w3, SXTW // dst += padding
add x4, x4, w5, SXTW // srcY += paddingY
increment_\ifmt
subs w1, w1, #1 // height -= 1
b.gt 1b
ret
endfunc
.endm
.macro declare_rgb_funcs ifmt
declare_func \ifmt, argb
declare_func \ifmt, rgba
declare_func \ifmt, abgr
declare_func \ifmt, bgra
.endm
declare_rgb_funcs nv12
declare_rgb_funcs nv21
declare_rgb_funcs yuv420p
declare_rgb_funcs yuv422p
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