virtualenv/FFmpeg
1
0
Fork 0
mirror of https://github.com/FFmpeg/FFmpeg.git synced 2025-08-10 06:10:52 +02:00
Code Issues Releases Activity

lavc/aarch64: hevc_sao reschedule slightly

Browse Source 
Signed-off-by: J. Dekker <jdek@itanimul.li>
This commit is contained in:
J. Dekker
2022-05-25 10:55:34 +02:00
parent 1cb601ad10
commit 3c694967f8
1 changed files with 16 additions and 12 deletions
Download Patch File Download Diff File Expand all files Collapse all files

28
libavcodec/aarch64/hevcdsp_sao_neon.S
View File

@@ -3,7 +3,7 @@
*
* AArch64 NEON optimised SAO functions for HEVC decoding
*
* Copyright (c) 2020 Josh Dekker <josh@itanimul.li>
* Copyright (c) 2022 J. Dekker <jdek@itanimul.li>
*
* This file is part of FFmpeg.
*
@@ -24,6 +24,10 @@
#include "libavutil/aarch64/asm.S"
#define MAX_PB_SIZE 64
#define AV_INPUT_BUFFER_PADDING_SIZE 64
#define SAO_STRIDE (2*MAX_PB_SIZE + AV_INPUT_BUFFER_PADDING_SIZE)
// void sao_band_filter(uint8_t *_dst, uint8_t *_src,
// ptrdiff_t stride_dst, ptrdiff_t stride_src,
// int16_t *sao_offset_val, int sao_left_class,
@@ -57,6 +61,7 @@ function ff_hevc_sao_band_filter_8x8_8_neon, export=1
// +----------------------------------->
// i-0 i-1 i-2 i-3
ld1 {v2.8b}, [x1], #8 // dst[x] = av_clip_pixel(src[x] + offset_table[src[x] >> shift]);
subs w8, w8, #8
uxtl v0.8h, v2.8b // load src[x]
ushr v2.8h, v0.8h, #3 // >> BIT_DEPTH - 3
shl v1.8h, v2.8h, #1 // low (x2, accessing short)
@@ -66,7 +71,7 @@ function ff_hevc_sao_band_filter_8x8_8_neon, export=1
add v1.8h, v0.8h, v2.8h // src[x] + table
sqxtun v4.8b, v1.8h // clip + narrow
st1 {v4.8b}, [x0], #8 // store
subs w8, w8, #8 // done 8 pixels
// done 8 pixels
bne 2b
subs w7, w7, #1 // finished line, prep. new
add x0, x0, x2 // dst += stride_dst
@@ -75,12 +80,11 @@ function ff_hevc_sao_band_filter_8x8_8_neon, export=1
ret
endfunc
// ASSUMES STRIDE_SRC = 192
.Lsao_edge_pos:
.word 1 // horizontal
.word 192 // vertical
.word 192 + 1 // 45 degree
.word 192 - 1 // 135 degree
.word SAO_STRIDE // vertical
.word SAO_STRIDE + 1 // 45 degree
.word SAO_STRIDE - 1 // 135 degree
// ff_hevc_sao_edge_filter_16x16_8_neon(char *dst, char *src, ptrdiff stride_dst,
// int16 *sao_offset_val, int eo, int width, int height)
@@ -98,7 +102,7 @@ function ff_hevc_sao_edge_filter_16x16_8_neon, export=1
uzp2 v1.16b, v3.16b, v3.16b // sao_offset_val -> upper
uzp1 v0.16b, v3.16b, v3.16b // sao_offset_val -> lower
movi v2.16b, #2
mov x15, #192
mov x15, #SAO_STRIDE
// strides between end of line and next src/dst
sub x15, x15, x5 // stride_src - width
sub x16, x2, x5 // stride_dst - width
@@ -111,6 +115,7 @@ function ff_hevc_sao_edge_filter_16x16_8_neon, export=1
ld1 {v3.16b}, [x11], #16 // load src
ld1 {v4.16b}, [x12], #16 // load src_a (prev)
ld1 {v5.16b}, [x13], #16 // load src_b (next)
subs x14, x14, #16
cmhi v16.16b, v4.16b, v3.16b // (prev > cur)
cmhi v17.16b, v3.16b, v4.16b // (cur > prev)
cmhi v18.16b, v5.16b, v3.16b // (next > cur)
@@ -130,12 +135,12 @@ function ff_hevc_sao_edge_filter_16x16_8_neon, export=1
sqxtun v3.8b, v20.8h
sqxtun2 v3.16b, v21.8h
st1 {v3.16b}, [x0], #16
subs x14, x14, #16 // filtered 16 bytes
// filtered 16 bytes
b.ne 2b // do we have width to filter?
// no width to filter, setup next line
subs w6, w6, #1 // filtered line
add x11, x11, x15 // stride src to next line
add x0, x0, x16 // stride dst to next line
subs w6, w6, #1 // filtered line
b.ne 1b // do we have lines to process?
// no lines to filter
ret
@@ -156,17 +161,17 @@ function ff_hevc_sao_edge_filter_8x8_8_neon, export=1
movi v2.16b, #2
add x16, x0, x2
lsl x2, x2, #1
mov x15, #192
mov x15, #SAO_STRIDE
mov x8, x1
sub x9, x1, x4
add x10, x1, x4
lsr w17, w6, #1
1: ld1 {v3.d}[0], [ x8], x15
ld1 {v4.d}[0], [ x9], x15
ld1 {v5.d}[0], [x10], x15
ld1 {v3.d}[1], [ x8], x15
ld1 {v4.d}[1], [ x9], x15
ld1 {v5.d}[1], [x10], x15
subs w6, w6, #2
cmhi v16.16b, v4.16b, v3.16b
cmhi v17.16b, v3.16b, v4.16b
cmhi v18.16b, v5.16b, v3.16b
@@ -187,7 +192,6 @@ function ff_hevc_sao_edge_filter_8x8_8_neon, export=1
sqxtun v7.8b, v21.8h
st1 {v6.8b}, [ x0], x2
st1 {v7.8b}, [x16], x2
subs x17, x17, #1
b.ne 1b
ret
endfunc