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Diffstat (limited to 'libswscale/arm/yuv2rgb_neon.S')
| -rw-r--r-- | libswscale/arm/yuv2rgb_neon.S | 162 |
1 files changed, 162 insertions, 0 deletions
diff --git a/libswscale/arm/yuv2rgb_neon.S b/libswscale/arm/yuv2rgb_neon.S new file mode 100644 index 0000000000..39b18cd34c --- /dev/null +++ b/libswscale/arm/yuv2rgb_neon.S @@ -0,0 +1,162 @@ +/* + * 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 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 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 r g b a + compute_color \r, q8, q9 + compute_color \g, q10, q11 + compute_color \b, q12, q13 + vmov.u8 \a, #255 +.endm + +.macro compute_half_line 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 d13, d14, d15, d12 +.endif + +.ifc \ofmt,rgba + compute_rgba d12, d13, d14, d15 +.endif + +.ifc \ofmt,abgr + compute_rgba d15, d14, d13, d12 +.endif + +.ifc \ofmt,bgra + compute_rgba d14, d13, d12, d15 +.endif + + vst4.8 {q6, q7}, [\dst,:128]! +.endm + +.macro declare_func ifmt ofmt +function ff_\ifmt\()_to_\ofmt\()_neon, export=1 + 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) +1: + mov r8, r0 @ r8 = width +2: + pld [r6, #64*3] + pld [r4, #64*3] + pld [r12, #64*3] + + vld2.8 {d2, d3}, [r6]! @ q1: interleaved chroma line + vmov.i8 d10, #128 +.ifc \ifmt,nv12 + vsubl.u8 q14, d2, d10 @ q14 = U - 128 + vsubl.u8 q15, d3, d10 @ q15 = V - 128 +.else + vsubl.u8 q14, d3, d10 @ q14 = U - 128 + vsubl.u8 q15, d2, d10 @ q15 = V - 128 +.endif + + compute_premult 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_half_line 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_half_line r11, d14, \ofmt + + compute_premult d29, d31 + compute_half_line r2, d28, \ofmt + compute_half_line r11, d30, \ofmt + + subs r8, r8, #16 @ width -= 16 + bgt 2b + + add r2, r2, r3 @ dst += padding + add r4, r4, r5 @ srcY += paddingY + add r11, r11, r3 @ dst2 += padding + add r12, r12, r5 @ srcY2 += paddingY + add r6, r6, r7 @ srcC += paddingC + + subs r1, r1, #2 @ height -= 2 + bgt 1b + + vpop {q4-q7} + pop {r4-r12, lr} + mov pc, lr +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 |