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