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ffmpeg/libswscale/arm/yuv2rgb_neon.S

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ArmAsm
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/*
* Copyright (c) 2015 Matthieu Bouron <matthieu.bouron stupeflix.com>
* Copyright (c) 2015 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/arm/asm.S"
.macro compute_premult_16 half_u1, half_u2, half_v1, half_v2
vmov d2, \half_u1 @ copy left q14 to left q1
vmov d3, \half_u1 @ copy left q14 to right q1
vmov d4, \half_u2 @ copy right q14 to left q2
vmov d5, \half_u2 @ copy right q14 to right q2
vmov d6, \half_v1 @ copy left q15 to left q3
vmov d7, \half_v1 @ copy left q15 to right q3
vmov d8, \half_v2 @ copy right q15 to left q4
vmov d9, \half_v2 @ copy right q15 to right q4
vzip.16 d2, d3 @ U1U1U2U2U3U3U4U4
vzip.16 d4, d5 @ U5U5U6U6U7U7U8U8
vzip.16 d6, d7 @ V1V1V2V2V3V3V4V4
vzip.16 d8, d9 @ V5V5V6V6V7V7V8V8
vmul.s16 q8, q3, d1[0] @ V * v2r (left, red)
vmul.s16 q9, q4, d1[0] @ V * v2r (right, red)
vmul.s16 q10, q1, d1[1] @ U * u2g
vmul.s16 q11, q2, d1[1] @ U * u2g
vmla.s16 q10, q3, d1[2] @ U * u2g + V * v2g (left, green)
vmla.s16 q11, q4, d1[2] @ U * u2g + V * v2g (right, green)
vmul.s16 q12, q1, d1[3] @ U * u2b (left, blue)
vmul.s16 q13, q2, d1[3] @ U * u2b (right, blue)
.endm
.macro compute_premult_32 half_u half_v
vmov d2, \half_u @ copy left q14 to left q1
vmov d3, \half_u @ copy left q14 to right q1
vmov d4, \half_v @ copy left q15 to left q2
vmov d5, \half_v @ copy left q15 to right q2
vzip.16 d2, d3 @ U1U1U2U2U3U3U4U4
vzip.16 d4, d5 @ V1V1V2V2V3V3V4V4
vmull.s16 q8, d4, d1[0] @ V * v2r (left, red)
vmull.s16 q9, d5, d1[0] @ V * v2r (right, red)
vmull.s16 q10, d2, d1[1] @ U * u2g
vmull.s16 q11, d3, d1[1] @ U * u2g
vmlal.s16 q10, d4, d1[2] @ U * u2g + V * v2g (left, green)
vmlal.s16 q11, d5, d1[2] @ U * u2g + V * v2g (right, green)
vmull.s16 q12, d2, d1[3] @ U * u2b (left, blue)
vmull.s16 q13, d3, d1[3] @ U * u2b (right, blue)
.endm
.macro compute_color_16 dst_comp1 dst_comp2 pre1 pre2
vadd.s16 q1, q14, \pre1
vadd.s16 q2, q15, \pre2
vqrshrun.s16 \dst_comp1, q1, #6
vqrshrun.s16 \dst_comp2, q2, #6
.endm
.macro compute_color_32 dst_comp pre1 pre2
vadd.s32 q3, q1, \pre1
vadd.s32 q4, q2, \pre2
vqrshrun.s32 d10, q3, #13
vqrshrun.s32 d11, q4, #13 @ q5 = ({q3,q4} + (1<<12)) >> 13
vqmovn.u16 \dst_comp, q5 @ saturate 16bit -> 8bit
.endm
.macro compute_rgba_16 r1 r2 g1 g2 b1 b2 a1 a2
compute_color_16 \r1, \r2, q8, q9
compute_color_16 \g1, \g2, q10, q11
compute_color_16 \b1, \b2, q12, q13
vmov.u8 \a1, #255
vmov.u8 \a2, #255
.endm
.macro compute_rgba_32 r g b a
compute_color_32 \r, q8, q9
compute_color_32 \g, q10, q11
compute_color_32 \b, q12, q13
vmov.u8 \a, #255
.endm
.macro compute_16px_16 dst y0 y1 ofmt
vmovl.u8 q14, \y0 @ 8px of y
vmovl.u8 q15, \y1 @ 8px of y
vdup.16 q5, r9 @ q5 = y_offset
vmov d14, d0 @ q7 = y_coeff
vmov d15, d0 @ q7 = y_coeff
vsub.s16 q14, q5
vsub.s16 q15, q5
vmul.s16 q14, q7 @ q14 = (srcY - y_offset) * y_coeff (left)
vmul.s16 q15, q7 @ q15 = (srcY - y_offset) * y_coeff (right)
.ifc \ofmt,argb
compute_rgba_16 d7, d11, d8, d12, d9, d13, d6, d10
.endif
.ifc \ofmt,rgba
compute_rgba_16 d6, d10, d7, d11, d8, d12, d9, d13
.endif
.ifc \ofmt,abgr
compute_rgba_16 d9, d13, d8, d12, d7, d11, d6, d10
.endif
.ifc \ofmt,bgra
compute_rgba_16 d8, d12, d7, d11, d6, d10, d9, d13
.endif
vst4.8 {q3, q4}, [\dst,:128]!
vst4.8 {q5, q6}, [\dst,:128]!
.endm
.macro compute_8px_32 dst half_y ofmt
vmovl.u8 q7, \half_y @ 8px of Y
vdup.16 q5, r9
vsub.s16 q7, q5
vmull.s16 q1, d14, d0 @ q1 = (srcY - y_offset) * y_coeff (left)
vmull.s16 q2, d15, d0 @ q2 = (srcY - y_offset) * y_coeff (right)
.ifc \ofmt,argb
compute_rgba_32 d13, d14, d15, d12
.endif
.ifc \ofmt,rgba
compute_rgba_32 d12, d13, d14, d15
.endif
.ifc \ofmt,abgr
compute_rgba_32 d15, d14, d13, d12
.endif
.ifc \ofmt,bgra
compute_rgba_32 d14, d13, d12, d15
.endif
vst4.8 {q6, q7}, [\dst,:128]!
.endm
.macro process_1l_16px_16 ofmt
compute_premult_16 d28, d29, d30, d31
vld1.8 {q7}, [r4]!
compute_16px_16 r2, d14, d15, \ofmt
.endm
.macro process_1l_16px_32 ofmt
compute_premult_32 d28, d30
vld1.8 {q7}, [r4]!
vmov d28, d15 @ save right of the line of luma for later use
compute_8px_32 r2, d14, \ofmt
compute_premult_32 d29, d31
compute_8px_32 r2, d28, \ofmt
.endm
.macro process_2l_16px_16 ofmt
compute_premult_16 d28, d29, d30, d31
vld1.8 {q7}, [r4]! @ first line of luma
compute_16px_16 r2, d14, d15, \ofmt
vld1.8 {q7}, [r12]! @ second line of luma
compute_16px_16 r11, d14, d15, \ofmt
.endm
.macro process_2l_16px_32 ofmt
compute_premult_32 d28, d30
vld1.8 {q7}, [r4]! @ first line of luma
vmov d28, d15 @ save right of the first line of luma for later use
compute_8px_32 r2, d14, \ofmt
vld1.8 {q7}, [r12]! @ second line of luma
vmov d30, d15 @ save right of the second line of luma for later use
compute_8px_32 r11, d14, \ofmt
compute_premult_32 d29, d31
compute_8px_32 r2, d28, \ofmt
compute_8px_32 r11, d30, \ofmt
.endm
.macro load_args_nvx
push {r4-r12, lr}
vpush {q4-q7}
ldr r4, [sp, #104] @ r4 = srcY
ldr r5, [sp, #108] @ r5 = linesizeY
ldr r6, [sp, #112] @ r6 = srcC
ldr r7, [sp, #116] @ r7 = linesizeC
ldr r8, [sp, #120] @ r8 = table
ldr r9, [sp, #124] @ r9 = y_offset
ldr r10,[sp, #128] @ r10 = y_coeff
vdup.16 d0, r10 @ d0 = y_coeff
vld1.16 {d1}, [r8] @ d1 = *table
add r11, r2, r3 @ r11 = dst + linesize (dst2)
add r12, r4, r5 @ r12 = srcY + linesizeY (srcY2)
lsl r3, r3, #1
lsl r5, r5, #1
lsl r8, r0, #2
sub r3, r3, r8 @ r3 = linesize * 2 - width * 4 (padding)
sub r5, r5, r0 @ r5 = linesizeY * 2 - width (paddingY)
sub r7, r7, r0 @ r7 = linesizeC - width (paddingC)
.endm
.macro load_args_yuv420p
push {r4-r12, lr}
vpush {q4-q7}
ldr r4, [sp, #104] @ r4 = srcY
ldr r5, [sp, #108] @ r5 = linesizeY
ldr r6, [sp, #112] @ r6 = srcU
ldr r8, [sp, #128] @ r8 = table
ldr r9, [sp, #132] @ r9 = y_offset
ldr r10,[sp, #136] @ r10 = y_coeff
vdup.16 d0, r10 @ d0 = y_coeff
vld1.16 {d1}, [r8] @ d1 = *table
add r11, r2, r3 @ r11 = dst + linesize (dst2)
add r12, r4, r5 @ r12 = srcY + linesizeY (srcY2)
lsl r3, r3, #1
lsl r5, r5, #1
lsl r8, r0, #2
sub r3, r3, r8 @ r3 = linesize * 2 - width * 4 (padding)
sub r5, r5, r0 @ r5 = linesizeY * 2 - width (paddingY)
ldr r10,[sp, #120] @ r10 = srcV
.endm
.macro load_args_yuv422p
push {r4-r12, lr}
vpush {q4-q7}
ldr r4, [sp, #104] @ r4 = srcY
ldr r5, [sp, #108] @ r5 = linesizeY
ldr r6, [sp, #112] @ r6 = srcU
ldr r7, [sp, #116] @ r7 = linesizeU
ldr r12,[sp, #124] @ r12 = linesizeV
ldr r8, [sp, #128] @ r8 = table
ldr r9, [sp, #132] @ r9 = y_offset
ldr r10,[sp, #136] @ r10 = y_coeff
vdup.16 d0, r10 @ d0 = y_coeff
vld1.16 {d1}, [r8] @ d1 = *table
add r11, r2, r3 @ r11 = dst + linesize (dst2)
lsl r8, r0, #2
sub r3, r3, r8 @ r3 = linesize * 2 - width * 4 (padding)
sub r5, r5, r0 @ r5 = linesizeY * 2 - width (paddingY)
sub r7, r7, r0, lsr #1 @ r7 = linesizeU - width / 2 (paddingU)
sub r12,r12,r0, lsr #1 @ r12 = linesizeV - width / 2 (paddingV)
ldr r10,[sp, #120] @ r10 = srcV
.endm
.macro declare_func ifmt ofmt precision
function ff_\ifmt\()_to_\ofmt\()_neon_\precision\(), export=1
.ifc \ifmt,nv12
load_args_nvx
.endif
.ifc \ifmt,nv21
load_args_nvx
.endif
.ifc \ifmt,yuv420p
load_args_yuv420p
.endif
.ifc \ifmt,yuv422p
load_args_yuv422p
.endif
1:
mov r8, r0 @ r8 = width
2:
pld [r6, #64*3]
pld [r4, #64*3]
vmov.i8 d10, #128
.ifc \ifmt,nv12
pld [r12, #64*3]
vld2.8 {d2, d3}, [r6]! @ q1: interleaved chroma line
vsubl.u8 q14, d2, d10 @ q14 = U - 128
vsubl.u8 q15, d3, d10 @ q15 = V - 128
process_2l_16px_\precision \ofmt
.endif
.ifc \ifmt,nv21
pld [r12, #64*3]
vld2.8 {d2, d3}, [r6]! @ q1: interleaved chroma line
vsubl.u8 q14, d3, d10 @ q14 = U - 128
vsubl.u8 q15, d2, d10 @ q15 = V - 128
process_2l_16px_\precision \ofmt
.endif
.ifc \ifmt,yuv420p
pld [r10, #64*3]
pld [r12, #64*3]
vld1.8 d2, [r6]! @ d2: chroma red line
vld1.8 d3, [r10]! @ d3: chroma blue line
vsubl.u8 q14, d2, d10 @ q14 = U - 128
vsubl.u8 q15, d3, d10 @ q15 = V - 128
process_2l_16px_\precision \ofmt
.endif
.ifc \ifmt,yuv422p
pld [r10, #64*3]
vld1.8 d2, [r6]! @ d2: chroma red line
vld1.8 d3, [r10]! @ d3: chroma blue line
vsubl.u8 q14, d2, d10 @ q14 = U - 128
vsubl.u8 q15, d3, d10 @ q15 = V - 128
process_1l_16px_\precision \ofmt
.endif
subs r8, r8, #16 @ width -= 16
bgt 2b
add r2, r2, r3 @ dst += padding
add r4, r4, r5 @ srcY += paddingY
.ifc \ifmt,nv12
add r11, r11, r3 @ dst2 += padding
add r12, r12, r5 @ srcY2 += paddingY
add r6, r6, r7 @ srcC += paddingC
subs r1, r1, #2 @ height -= 2
.endif
.ifc \ifmt,nv21
add r11, r11, r3 @ dst2 += padding
add r12, r12, r5 @ srcY2 += paddingY
add r6, r6, r7 @ srcC += paddingC
subs r1, r1, #2 @ height -= 2
.endif
.ifc \ifmt,yuv420p
add r11, r11, r3 @ dst2 += padding
add r12, r12, r5 @ srcY2 += paddingY
ldr r7, [sp, #116] @ r7 = linesizeU
sub r7, r7, r0, lsr #1 @ r7 = linesizeU - width / 2 (paddingU)
add r6, r6, r7 @ srcU += paddingU
ldr r7, [sp, #124] @ r7 = linesizeV
sub r7, r7, r0, lsr #1 @ r7 = linesizeV - width / 2 (paddingV)
add r10, r10, r7 @ srcV += paddingV
subs r1, r1, #2 @ height -= 2
.endif
.ifc \ifmt,yuv422p
add r6, r6, r7 @ srcU += paddingU
add r10,r10,r12 @ srcV += paddingV
subs r1, r1, #1 @ height -= 1
.endif
bgt 1b
vpop {q4-q7}
pop {r4-r12, lr}
mov pc, lr
endfunc
.endm
.macro declare_rgb_funcs ifmt precision
declare_func \ifmt, argb, \precision
declare_func \ifmt, rgba, \precision
declare_func \ifmt, abgr, \precision
declare_func \ifmt, bgra, \precision
.endm
declare_rgb_funcs nv12, 16
declare_rgb_funcs nv21, 16
declare_rgb_funcs nv12, 32
declare_rgb_funcs nv21, 32
declare_rgb_funcs yuv420p, 16
declare_rgb_funcs yuv420p, 32
declare_rgb_funcs yuv422p, 16
declare_rgb_funcs yuv422p, 32
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