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aarch64/h26x: optimize sao_band_filter

int8_t[] is enough for offset_table of 8 bit streams. On rpi5: Before After hevc_sao_band_8_8_c: 252.3 ( 1.00x) 252.3 ( 1.00x) hevc_sao_band_8_8_neon: 95.8 ( 2.63x) 61.0 ( 4.57x) hevc_sao_band_16_8_c: 875.2 ( 1.00x) 864.9 ( 1.00x) hevc_sao_band_16_8_neon: 317.5 ( 2.76x) 150.0 ( 6.26x) hevc_sao_band_32_8_c: 3853.5 ( 1.00x) 3871.6 ( 1.00x) hevc_sao_band_32_8_neon: 1222.3 ( 3.15x) 550.6 ( 7.39) hevc_sao_band_48_8_c: 8203.6 ( 1.00x) 8182.6 ( 1.00x) hevc_sao_band_48_8_neon: 2685.7 ( 3.05x) 1185.8 ( 7.36x) hevc_sao_band_64_8_c: 14023.0 ( 1.00x) 14038.9 ( 1.00x) hevc_sao_band_64_8_neon: 4783.2 ( 2.93x) 2078.4 ( 7.15x)

Zhao Zhili committed 1 year ago

Commit 39786f81 parent ca964ba4 files · +65 −41Browse files

Showing the changes to libavcodec (4 of 4 files). Show all

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4 files
  1. libavcodec/aarch64/h26x/dsp.h +4 −0
  2. libavcodec/aarch64/h26x/sao_neon.S +56 −37
  3. libavcodec/aarch64/hevcdsp_init_aarch64.c +2 −2
  4. libavcodec/aarch64/vvc/dsp_init.c +3 −2
libavcodec/aarch64/h26x/dsp.h+4−0
@@ -28,6 +28,10 @@ void ff_h26x_sao_band_filter_8x8_8_neon(uint8_t *_dst, const uint8_t *_src, · 27 unmodified lines
2828 ptrdiff_t stride_dst, ptrdiff_t stride_src,
2929 const int16_t *sao_offset_val, int sao_left_class,
3030 int width, int height);
31+void ff_h26x_sao_band_filter_16x16_8_neon(uint8_t *_dst, const uint8_t *_src,
32+ ptrdiff_t stride_dst, ptrdiff_t stride_src,
33+ const int16_t *sao_offset_val, int sao_left_class,
34+ int width, int height);
3135 void ff_hevc_sao_edge_filter_16x16_8_neon(uint8_t *dst, const uint8_t *src, ptrdiff_t stride_dst,
3236 const int16_t *sao_offset_val, int eo, int width, int height);
3337 void ff_hevc_sao_edge_filter_8x8_8_neon(uint8_t *dst, const uint8_t *src, ptrdiff_t stride_dst,
libavcodec/aarch64/h26x/sao_neon.S+56−37
@@ -35,48 +35,67 @@ · 34 unmodified lines
3535 // int16_t *sao_offset_val, int sao_left_class,
3636 // int width, int height)
3737 function ff_h26x_sao_band_filter_8x8_8_neon, export=1
38− stp xzr, xzr, [sp, #-64]!
38+ stp xzr, xzr, [sp, #-32]!
3939 stp xzr, xzr, [sp, #16]
40− stp xzr, xzr, [sp, #32]
41− stp xzr, xzr, [sp, #48]
4240 mov w8, #4
43−0: ldrsh x9, [x4, x8, lsl #1] // sao_offset_val[k+1]
44− subs w8, w8, #1
45− add w10, w8, w5 // k + sao_left_class
41+0:
42+ ldrsh x9, [x4, x8, lsl #1] // sao_offset_val[k+1]
43+ subs w8, w8, #1
44+ add w10, w8, w5 // k + sao_left_class
4645 and w10, w10, #0x1F
47− strh w9, [sp, x10, lsl #1]
46+ strb w9, [sp, x10]
4847 bne 0b
49− add w6, w6, #7
50− bic w6, w6, #7
51− ld1 {v16.16b-v19.16b}, [sp], #64
52− sub x2, x2, x6
53− sub x3, x3, x6
54− movi v20.8h, #1
55−1: mov w8, w6 // beginning of line
56−2: // Simple layout for accessing 16bit values
57− // with 8bit LUT.
58− //
59− // 00 01 02 03 04 05 06 07
60− // +----------------------------------->
61− // |xDE#xAD|xCA#xFE|xBE#xEF|xFE#xED|....
62− // +----------------------------------->
63− // i-0 i-1 i-2 i-3
64− ld1 {v2.8b}, [x1], #8 // dst[x] = av_clip_pixel(src[x] + offset_table[src[x] >> shift]);
65− subs w8, w8, #8
66− uxtl v0.8h, v2.8b // load src[x]
67− ushr v2.8h, v0.8h, #3 // >> BIT_DEPTH - 3
68− shl v1.8h, v2.8h, #1 // low (x2, accessing short)
69− add v3.8h, v1.8h, v20.8h // +1 access upper short
70− sli v1.8h, v3.8h, #8 // shift insert index to upper byte
71− tbx v2.16b, {v16.16b-v19.16b}, v1.16b // table
72− add v1.8h, v0.8h, v2.8h // src[x] + table
73− sqxtun v4.8b, v1.8h // clip + narrow
74− st1 {v4.8b}, [x0], #8 // store
75− // done 8 pixels
48+ ldp q16, q17, [sp], #32
49+1:
50+ ld1 {v2.8b}, [x1], x3
51+ subs w7, w7, #1
52+ uxtl v0.8h, v2.8b
53+ ushr v3.8b, v2.8b, #3 // >> BIT_DEPTH - 3
54+ tbl v3.8b, {v16.16b-v17.16b}, v3.8b
55+ sxtl v2.8h, v3.8b
56+ add v0.8h, v0.8h, v2.8h // src[x] + table
57+ sqxtun v0.8b, v0.8h // clip + narrow
58+ st1 {v0.8b}, [x0], x2
59+ bne 1b
60+ ret
61+endfunc
62+
63+function ff_h26x_sao_band_filter_16x16_8_neon, export=1
64+ stp xzr, xzr, [sp, #-32]!
65+ stp xzr, xzr, [sp, #16]
66+ mov w8, #4
67+0:
68+ ldrsh x9, [x4, x8, lsl #1] // sao_offset_val[k+1]
69+ subs w8, w8, #1
70+ add w10, w8, w5 // k + sao_left_class
71+ and w10, w10, #0x1F
72+ strb w9, [sp, x10]
73+ bne 0b
74+ add w6, w6, #15
75+ bic w6, w6, #15
76+ ldp q16, q17, [sp], #32
77+ sub x2, x2, x6
78+ sub x3, x3, x6
79+1:
80+ mov w8, w6 // beginning of line
81+2:
82+ ldr q2, [x1], #16
83+ subs w8, w8, #16
84+ uxtl v0.8h, v2.8b
85+ uxtl2 v1.8h, v2.16b
86+ ushr v3.16b, v2.16b, #3 // >> BIT_DEPTH - 3
87+ tbl v3.16b, {v16.16b-v17.16b}, v3.16b
88+ sxtl v2.8h, v3.8b
89+ sxtl2 v3.8h, v3.16b
90+ add v0.8h, v0.8h, v2.8h // src[x] + table
91+ add v1.8h, v1.8h, v3.8h
92+ sqxtun v0.8b, v0.8h // clip + narrow
93+ sqxtun2 v0.16b, v1.8h
94+ str q0, [x0], #16
7695 bne 2b
77− subs w7, w7, #1 // finished line, prep. new
78− add x0, x0, x2 // dst += stride_dst
79− add x1, x1, x3 // src += stride_src
96+ subs w7, w7, #1
97+ add x0, x0, x2 // dst += stride_dst
98+ add x1, x1, x3 // src += stride_src
8099 bne 1b
81100 ret
82101 endfunc
libavcodec/aarch64/hevcdsp_init_aarch64.c+2−2
@@ -157,11 +157,11 @@ av_cold void ff_hevc_dsp_init_aarch64(HEVCDSPContext *c, const int bit_depth) · 156 unmodified lines
157157 c->idct_dc[2] = ff_hevc_idct_16x16_dc_8_neon;
158158 c->idct_dc[3] = ff_hevc_idct_32x32_dc_8_neon;
159159 c->transform_4x4_luma = ff_hevc_transform_luma_4x4_neon_8;
160− c->sao_band_filter[0] =
160+ c->sao_band_filter[0] = ff_h26x_sao_band_filter_8x8_8_neon;
161161 c->sao_band_filter[1] =
162162 c->sao_band_filter[2] =
163163 c->sao_band_filter[3] =
164− c->sao_band_filter[4] = ff_h26x_sao_band_filter_8x8_8_neon;
164+ c->sao_band_filter[4] = ff_h26x_sao_band_filter_16x16_8_neon;
165165 c->sao_edge_filter[0] = ff_hevc_sao_edge_filter_8x8_8_neon;
166166 c->sao_edge_filter[1] =
167167 c->sao_edge_filter[2] =
libavcodec/aarch64/vvc/dsp_init.c+3−2
@@ -197,8 +197,9 @@ void ff_vvc_dsp_init_aarch64(VVCDSPContext *const c, const int bd) · 196 unmodified lines
197197 c->inter.dmvr[1][1] = ff_vvc_dmvr_hv_8_neon;
198198 c->inter.apply_bdof = apply_bdof_8;
199199
200− for (int i = 0; i < FF_ARRAY_ELEMS(c->sao.band_filter); i++)
201− c->sao.band_filter[i] = ff_h26x_sao_band_filter_8x8_8_neon;
200+ c->sao.band_filter[0] = ff_h26x_sao_band_filter_8x8_8_neon;
201+ for (int i = 1; i < FF_ARRAY_ELEMS(c->sao.band_filter); i++)
202+ c->sao.band_filter[i] = ff_h26x_sao_band_filter_16x16_8_neon;
202203 c->sao.edge_filter[0] = ff_vvc_sao_edge_filter_8x8_8_neon;
203204 for (int i = 1; i < FF_ARRAY_ELEMS(c->sao.edge_filter); i++)
204205 c->sao.edge_filter[i] = ff_vvc_sao_edge_filter_16x16_8_neon;

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