1/* 2 * Copyright (c) 2016 Clément Bœsch <clement stupeflix.com> 3 * Copyright (c) 2016 Matthieu Bouron <matthieu.bouron stupeflix.com> 4 * 5 * This file is part of FFmpeg. 6 * 7 * FFmpeg is free software; you can redistribute it and/or 8 * modify it under the terms of the GNU Lesser General Public 9 * License as published by the Free Software Foundation; either 10 * version 2.1 of the License, or (at your option) any later version. 11 * 12 * FFmpeg is distributed in the hope that it will be useful, 13 * but WITHOUT ANY WARRANTY; without even the implied warranty of 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 15 * Lesser General Public License for more details. 16 * 17 * You should have received a copy of the GNU Lesser General Public 18 * License along with FFmpeg; if not, write to the Free Software 19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 20 */ 21 22#include "libavutil/arm/asm.S" 23 24function ff_yuv2planeX_8_neon, export=1 25 push {r4-r12, lr} 26 vpush {q4-q7} 27 ldr r4, [sp, #104] @ dstW 28 ldr r5, [sp, #108] @ dither 29 ldr r6, [sp, #112] @ offset 30 vld1.8 {d0}, [r5] @ load 8x8-bit dither values 31 cmp r6, #0 @ check offsetting which can be 0 or 3 only 32 beq 1f 33 vext.u8 d0, d0, d0, #3 @ honor offseting which can be 3 only 341: vmovl.u8 q0, d0 @ extend dither to 16-bit 35 vshll.u16 q1, d0, #12 @ extend dither to 32-bit with left shift by 12 (part 1) 36 vshll.u16 q2, d1, #12 @ extend dither to 32-bit with left shift by 12 (part 2) 37 mov r7, #0 @ i = 0 382: vmov.u8 q3, q1 @ initialize accumulator with dithering values (part 1) 39 vmov.u8 q4, q2 @ initialize accumulator with dithering values (part 2) 40 mov r8, r1 @ tmpFilterSize = filterSize 41 mov r9, r2 @ srcp 42 mov r10, r0 @ filterp 433: ldr r11, [r9], #4 @ get pointer @ src[j] 44 ldr r12, [r9], #4 @ get pointer @ src[j+1] 45 add r11, r11, r7, lsl #1 @ &src[j][i] 46 add r12, r12, r7, lsl #1 @ &src[j+1][i] 47 vld1.16 {q5}, [r11] @ read 8x16-bit @ src[j ][i + {0..7}]: A,B,C,D,E,F,G,H 48 vld1.16 {q6}, [r12] @ read 8x16-bit @ src[j+1][i + {0..7}]: I,J,K,L,M,N,O,P 49 ldr r11, [r10], #4 @ read 2x16-bit coeffs (X, Y) at (filter[j], filter[j+1]) 50 vmov.16 q7, q5 @ copy 8x16-bit @ src[j ][i + {0..7}] for following inplace zip instruction 51 vmov.16 q8, q6 @ copy 8x16-bit @ src[j+1][i + {0..7}] for following inplace zip instruction 52 vzip.16 q7, q8 @ A,I,B,J,C,K,D,L,E,M,F,N,G,O,H,P 53 vdup.32 q15, r11 @ X,Y,X,Y,X,Y,X,Y 54 vmull.s16 q9, d14, d30 @ A*X,I*Y,B*X,J*Y 55 vmull.s16 q10, d15, d31 @ C*X,K*Y,D*X,L*Y 56 vmull.s16 q11, d16, d30 @ E*X,M*Y,F*X,N*Y 57 vmull.s16 q12, d17, d31 @ G*X,O*Y,H*X,P*Y 58 vpadd.s32 d10, d18, d19 @ A*X+I*Y,B*X+J*Y 59 vpadd.s32 d11, d20, d21 @ C*X+K*Y,D*X+L*Y 60 vpadd.s32 d12, d22, d23 @ E*X+M*Y,F*X+N*Y 61 vpadd.s32 d13, d24, d25 @ G*X+O*Y,H*X+P*Y 62 vadd.s32 q3, q5 @ update val accumulator (part 1) 63 vadd.s32 q4, q6 @ update val accumulator (part 2) 64 subs r8, #2 @ tmpFilterSize -= 2 65 bgt 3b @ loop until filterSize is consumed 66 vshr.s32 q3, q3, #19 @ val>>19 (part 1) 67 vshr.s32 q4, q4, #19 @ val>>19 (part 2) 68 vqmovun.s32 d6, q3 @ clip16(val>>19) (part 1) 69 vqmovun.s32 d7, q4 @ clip16(val>>19) (part 2) 70 vqmovn.u16 d6, q3 @ merge part 1 and part 2 71 vst1.8 {d6}, [r3]! @ write destination 72 add r7, #8 @ i += 8 73 subs r4, r4, #8 @ dstW -= 8 74 bgt 2b @ loop until width is consumed 75 vpop {q4-q7} 76 pop {r4-r12, lr} 77 mov pc, lr 78endfunc 79