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-rw-r--r--vp9/common/vp9_filter.h8
-rw-r--r--vp9/encoder/arm/neon/vp9_variance_neon.c40
-rw-r--r--vp9/encoder/vp9_mcomp.c16
-rw-r--r--vp9/encoder/vp9_variance.c51
-rw-r--r--vp9/encoder/x86/vp9_highbd_subpel_variance.asm16
-rw-r--r--vp9/encoder/x86/vp9_subpel_variance.asm24
-rw-r--r--vp9/encoder/x86/vp9_subpel_variance_impl_intrin_avx2.c16
7 files changed, 61 insertions, 110 deletions
diff --git a/vp9/common/vp9_filter.h b/vp9/common/vp9_filter.h
index d963ee235..808a270fa 100644
--- a/vp9/common/vp9_filter.h
+++ b/vp9/common/vp9_filter.h
@@ -43,14 +43,6 @@ typedef int16_t InterpKernel[SUBPEL_TAPS];
const InterpKernel *vp9_get_interp_kernel(INTERP_FILTER filter);
-DECLARE_ALIGNED(256, extern const InterpKernel,
- vp9_bilinear_filters[SUBPEL_SHIFTS]);
-
-// The VP9_BILINEAR_FILTERS_2TAP macro returns a pointer to the bilinear
-// filter kernel as a 2 tap filter.
-#define BILINEAR_FILTERS_2TAP(x) \
- (vp9_bilinear_filters[(x)] + SUBPEL_TAPS/2 - 1)
-
#ifdef __cplusplus
} // extern "C"
#endif
diff --git a/vp9/encoder/arm/neon/vp9_variance_neon.c b/vp9/encoder/arm/neon/vp9_variance_neon.c
index 166156af7..0ac194e92 100644
--- a/vp9/encoder/arm/neon/vp9_variance_neon.c
+++ b/vp9/encoder/arm/neon/vp9_variance_neon.c
@@ -16,10 +16,18 @@
#include "vpx_ports/mem.h"
#include "vpx/vpx_integer.h"
-#include "vp9/common/vp9_common.h"
#include "vp9/common/vp9_filter.h"
-#include "vp9/encoder/vp9_variance.h"
+static uint8_t bilinear_filters[8][2] = {
+ { 128, 0, },
+ { 112, 16, },
+ { 96, 32, },
+ { 80, 48, },
+ { 64, 64, },
+ { 48, 80, },
+ { 32, 96, },
+ { 16, 112, },
+};
static void var_filter_block2d_bil_w8(const uint8_t *src_ptr,
uint8_t *output_ptr,
@@ -27,9 +35,9 @@ static void var_filter_block2d_bil_w8(const uint8_t *src_ptr,
int pixel_step,
unsigned int output_height,
unsigned int output_width,
- const int16_t *vp9_filter) {
- const uint8x8_t f0 = vmov_n_u8((uint8_t)vp9_filter[0]);
- const uint8x8_t f1 = vmov_n_u8((uint8_t)vp9_filter[1]);
+ const uint8_t *vp9_filter) {
+ const uint8x8_t f0 = vmov_n_u8(vp9_filter[0]);
+ const uint8x8_t f1 = vmov_n_u8(vp9_filter[1]);
unsigned int i;
for (i = 0; i < output_height; ++i) {
const uint8x8_t src_0 = vld1_u8(&src_ptr[0]);
@@ -50,9 +58,9 @@ static void var_filter_block2d_bil_w16(const uint8_t *src_ptr,
int pixel_step,
unsigned int output_height,
unsigned int output_width,
- const int16_t *vp9_filter) {
- const uint8x8_t f0 = vmov_n_u8((uint8_t)vp9_filter[0]);
- const uint8x8_t f1 = vmov_n_u8((uint8_t)vp9_filter[1]);
+ const uint8_t *vp9_filter) {
+ const uint8x8_t f0 = vmov_n_u8(vp9_filter[0]);
+ const uint8x8_t f1 = vmov_n_u8(vp9_filter[1]);
unsigned int i, j;
for (i = 0; i < output_height; ++i) {
for (j = 0; j < output_width; j += 16) {
@@ -84,9 +92,9 @@ unsigned int vp9_sub_pixel_variance8x8_neon(const uint8_t *src,
var_filter_block2d_bil_w8(src, fdata3, src_stride, 1,
9, 8,
- BILINEAR_FILTERS_2TAP(xoffset));
+ bilinear_filters[xoffset]);
var_filter_block2d_bil_w8(fdata3, temp2, 8, 8, 8,
- 8, BILINEAR_FILTERS_2TAP(yoffset));
+ 8, bilinear_filters[yoffset]);
return vpx_variance8x8_neon(temp2, 8, dst, dst_stride, sse);
}
@@ -102,9 +110,9 @@ unsigned int vp9_sub_pixel_variance16x16_neon(const uint8_t *src,
var_filter_block2d_bil_w16(src, fdata3, src_stride, 1,
17, 16,
- BILINEAR_FILTERS_2TAP(xoffset));
+ bilinear_filters[xoffset]);
var_filter_block2d_bil_w16(fdata3, temp2, 16, 16, 16,
- 16, BILINEAR_FILTERS_2TAP(yoffset));
+ 16, bilinear_filters[yoffset]);
return vpx_variance16x16_neon(temp2, 16, dst, dst_stride, sse);
}
@@ -120,9 +128,9 @@ unsigned int vp9_sub_pixel_variance32x32_neon(const uint8_t *src,
var_filter_block2d_bil_w16(src, fdata3, src_stride, 1,
33, 32,
- BILINEAR_FILTERS_2TAP(xoffset));
+ bilinear_filters[xoffset]);
var_filter_block2d_bil_w16(fdata3, temp2, 32, 32, 32,
- 32, BILINEAR_FILTERS_2TAP(yoffset));
+ 32, bilinear_filters[yoffset]);
return vpx_variance32x32_neon(temp2, 32, dst, dst_stride, sse);
}
@@ -138,8 +146,8 @@ unsigned int vp9_sub_pixel_variance64x64_neon(const uint8_t *src,
var_filter_block2d_bil_w16(src, fdata3, src_stride, 1,
65, 64,
- BILINEAR_FILTERS_2TAP(xoffset));
+ bilinear_filters[xoffset]);
var_filter_block2d_bil_w16(fdata3, temp2, 64, 64, 64,
- 64, BILINEAR_FILTERS_2TAP(yoffset));
+ 64, bilinear_filters[yoffset]);
return vpx_variance64x64_neon(temp2, 64, dst, dst_stride, sse);
}
diff --git a/vp9/encoder/vp9_mcomp.c b/vp9/encoder/vp9_mcomp.c
index 15f95829f..234272697 100644
--- a/vp9/encoder/vp9_mcomp.c
+++ b/vp9/encoder/vp9_mcomp.c
@@ -162,9 +162,9 @@ void vp9_init3smotion_compensation(search_site_config *cfg, int stride) {
error_per_bit + 4096) >> 13 : 0)
-// convert motion vector component to offset for svf calc
+// convert motion vector component to offset for sv[a]f calc
static INLINE int sp(int x) {
- return (x & 7) << 1;
+ return x & 7;
}
static INLINE const uint8_t *pre(const uint8_t *buf, int stride, int r, int c) {
@@ -679,16 +679,14 @@ int vp9_find_best_sub_pixel_tree(const MACROBLOCK *x,
tc = bc + search_step[idx].col;
if (tc >= minc && tc <= maxc && tr >= minr && tr <= maxr) {
const uint8_t *const pre_address = y + (tr >> 3) * y_stride + (tc >> 3);
- int row_offset = (tr & 0x07) << 1;
- int col_offset = (tc & 0x07) << 1;
MV this_mv;
this_mv.row = tr;
this_mv.col = tc;
if (second_pred == NULL)
- thismse = vfp->svf(pre_address, y_stride, col_offset, row_offset,
+ thismse = vfp->svf(pre_address, y_stride, sp(tc), sp(tr),
src_address, src_stride, &sse);
else
- thismse = vfp->svaf(pre_address, y_stride, col_offset, row_offset,
+ thismse = vfp->svaf(pre_address, y_stride, sp(tc), sp(tr),
src_address, src_stride, &sse, second_pred);
cost_array[idx] = thismse +
mv_err_cost(&this_mv, ref_mv, mvjcost, mvcost, error_per_bit);
@@ -709,14 +707,12 @@ int vp9_find_best_sub_pixel_tree(const MACROBLOCK *x,
tr = br + (cost_array[2] < cost_array[3] ? -hstep : hstep);
if (tc >= minc && tc <= maxc && tr >= minr && tr <= maxr) {
const uint8_t *const pre_address = y + (tr >> 3) * y_stride + (tc >> 3);
- int row_offset = (tr & 0x07) << 1;
- int col_offset = (tc & 0x07) << 1;
MV this_mv = {tr, tc};
if (second_pred == NULL)
- thismse = vfp->svf(pre_address, y_stride, col_offset, row_offset,
+ thismse = vfp->svf(pre_address, y_stride, sp(tc), sp(tr),
src_address, src_stride, &sse);
else
- thismse = vfp->svaf(pre_address, y_stride, col_offset, row_offset,
+ thismse = vfp->svaf(pre_address, y_stride, sp(tc), sp(tr),
src_address, src_stride, &sse, second_pred);
cost_array[4] = thismse +
mv_err_cost(&this_mv, ref_mv, mvjcost, mvcost, error_per_bit);
diff --git a/vp9/encoder/vp9_variance.c b/vp9/encoder/vp9_variance.c
index 1f6b083c4..c571b7c95 100644
--- a/vp9/encoder/vp9_variance.c
+++ b/vp9/encoder/vp9_variance.c
@@ -19,6 +19,17 @@
#include "vp9/encoder/vp9_variance.h"
+static uint8_t bilinear_filters[8][2] = {
+ { 128, 0, },
+ { 112, 16, },
+ { 96, 32, },
+ { 80, 48, },
+ { 64, 64, },
+ { 48, 80, },
+ { 32, 96, },
+ { 16, 112, },
+};
+
// Applies a 1-D 2-tap bi-linear filter to the source block in either horizontal
// or vertical direction to produce the filtered output block. Used to implement
// first-pass of 2-D separable filter.
@@ -33,7 +44,7 @@ static void var_filter_block2d_bil_first_pass(const uint8_t *src_ptr,
int pixel_step,
unsigned int output_height,
unsigned int output_width,
- const int16_t *vp9_filter) {
+ const uint8_t *vp9_filter) {
unsigned int i, j;
for (i = 0; i < output_height; i++) {
@@ -65,7 +76,7 @@ static void var_filter_block2d_bil_second_pass(const uint16_t *src_ptr,
unsigned int pixel_step,
unsigned int output_height,
unsigned int output_width,
- const int16_t *vp9_filter) {
+ const uint8_t *vp9_filter) {
unsigned int i, j;
for (i = 0; i < output_height; i++) {
@@ -91,9 +102,9 @@ unsigned int vp9_sub_pixel_variance##W##x##H##_c( \
uint8_t temp2[H * W]; \
\
var_filter_block2d_bil_first_pass(src, fdata3, src_stride, 1, H + 1, W, \
- BILINEAR_FILTERS_2TAP(xoffset)); \
+ bilinear_filters[xoffset]); \
var_filter_block2d_bil_second_pass(fdata3, temp2, W, W, H, W, \
- BILINEAR_FILTERS_2TAP(yoffset)); \
+ bilinear_filters[yoffset]); \
\
return vpx_variance##W##x##H##_c(temp2, W, dst, dst_stride, sse); \
}
@@ -110,9 +121,9 @@ unsigned int vp9_sub_pixel_avg_variance##W##x##H##_c( \
DECLARE_ALIGNED(16, uint8_t, temp3[H * W]); \
\
var_filter_block2d_bil_first_pass(src, fdata3, src_stride, 1, H + 1, W, \
- BILINEAR_FILTERS_2TAP(xoffset)); \
+ bilinear_filters[xoffset]); \
var_filter_block2d_bil_second_pass(fdata3, temp2, W, W, H, W, \
- BILINEAR_FILTERS_2TAP(yoffset)); \
+ bilinear_filters[yoffset]); \
\
vpx_comp_avg_pred(temp3, second_pred, W, H, temp2, W); \
\
@@ -166,7 +177,7 @@ static void highbd_var_filter_block2d_bil_first_pass(
int pixel_step,
unsigned int output_height,
unsigned int output_width,
- const int16_t *vp9_filter) {
+ const uint8_t *vp9_filter) {
unsigned int i, j;
uint16_t *src_ptr = CONVERT_TO_SHORTPTR(src_ptr8);
for (i = 0; i < output_height; i++) {
@@ -192,7 +203,7 @@ static void highbd_var_filter_block2d_bil_second_pass(
unsigned int pixel_step,
unsigned int output_height,
unsigned int output_width,
- const int16_t *vp9_filter) {
+ const uint8_t *vp9_filter) {
unsigned int i, j;
for (i = 0; i < output_height; i++) {
@@ -219,9 +230,9 @@ unsigned int vp9_highbd_sub_pixel_variance##W##x##H##_c( \
uint16_t temp2[H * W]; \
\
highbd_var_filter_block2d_bil_first_pass(src, fdata3, src_stride, 1, H + 1, \
- W, BILINEAR_FILTERS_2TAP(xoffset)); \
+ W, bilinear_filters[xoffset]); \
highbd_var_filter_block2d_bil_second_pass(fdata3, temp2, W, W, H, W, \
- BILINEAR_FILTERS_2TAP(yoffset)); \
+ bilinear_filters[yoffset]); \
\
return vpx_highbd_8_variance##W##x##H##_c(CONVERT_TO_BYTEPTR(temp2), W, dst, \
dst_stride, sse); \
@@ -236,9 +247,9 @@ unsigned int vp9_highbd_10_sub_pixel_variance##W##x##H##_c( \
uint16_t temp2[H * W]; \
\
highbd_var_filter_block2d_bil_first_pass(src, fdata3, src_stride, 1, H + 1, \
- W, BILINEAR_FILTERS_2TAP(xoffset)); \
+ W, bilinear_filters[xoffset]); \
highbd_var_filter_block2d_bil_second_pass(fdata3, temp2, W, W, H, W, \
- BILINEAR_FILTERS_2TAP(yoffset)); \
+ bilinear_filters[yoffset]); \
\
return vpx_highbd_10_variance##W##x##H##_c(CONVERT_TO_BYTEPTR(temp2), \
W, dst, dst_stride, sse); \
@@ -253,9 +264,9 @@ unsigned int vp9_highbd_12_sub_pixel_variance##W##x##H##_c( \
uint16_t temp2[H * W]; \
\
highbd_var_filter_block2d_bil_first_pass(src, fdata3, src_stride, 1, H + 1, \
- W, BILINEAR_FILTERS_2TAP(xoffset)); \
+ W, bilinear_filters[xoffset]); \
highbd_var_filter_block2d_bil_second_pass(fdata3, temp2, W, W, H, W, \
- BILINEAR_FILTERS_2TAP(yoffset)); \
+ bilinear_filters[yoffset]); \
\
return vpx_highbd_12_variance##W##x##H##_c(CONVERT_TO_BYTEPTR(temp2), \
W, dst, dst_stride, sse); \
@@ -273,9 +284,9 @@ unsigned int vp9_highbd_sub_pixel_avg_variance##W##x##H##_c( \
DECLARE_ALIGNED(16, uint16_t, temp3[H * W]); \
\
highbd_var_filter_block2d_bil_first_pass(src, fdata3, src_stride, 1, H + 1, \
- W, BILINEAR_FILTERS_2TAP(xoffset)); \
+ W, bilinear_filters[xoffset]); \
highbd_var_filter_block2d_bil_second_pass(fdata3, temp2, W, W, H, W, \
- BILINEAR_FILTERS_2TAP(yoffset)); \
+ bilinear_filters[yoffset]); \
\
vpx_highbd_comp_avg_pred(temp3, second_pred, W, H, \
CONVERT_TO_BYTEPTR(temp2), W); \
@@ -295,9 +306,9 @@ unsigned int vp9_highbd_10_sub_pixel_avg_variance##W##x##H##_c( \
DECLARE_ALIGNED(16, uint16_t, temp3[H * W]); \
\
highbd_var_filter_block2d_bil_first_pass(src, fdata3, src_stride, 1, H + 1, \
- W, BILINEAR_FILTERS_2TAP(xoffset)); \
+ W, bilinear_filters[xoffset]); \
highbd_var_filter_block2d_bil_second_pass(fdata3, temp2, W, W, H, W, \
- BILINEAR_FILTERS_2TAP(yoffset)); \
+ bilinear_filters[yoffset]); \
\
vpx_highbd_comp_avg_pred(temp3, second_pred, W, H, \
CONVERT_TO_BYTEPTR(temp2), W); \
@@ -317,9 +328,9 @@ unsigned int vp9_highbd_12_sub_pixel_avg_variance##W##x##H##_c( \
DECLARE_ALIGNED(16, uint16_t, temp3[H * W]); \
\
highbd_var_filter_block2d_bil_first_pass(src, fdata3, src_stride, 1, H + 1, \
- W, BILINEAR_FILTERS_2TAP(xoffset)); \
+ W, bilinear_filters[xoffset]); \
highbd_var_filter_block2d_bil_second_pass(fdata3, temp2, W, W, H, W, \
- BILINEAR_FILTERS_2TAP(yoffset)); \
+ bilinear_filters[yoffset]); \
\
vpx_highbd_comp_avg_pred(temp3, second_pred, W, H, \
CONVERT_TO_BYTEPTR(temp2), W); \
diff --git a/vp9/encoder/x86/vp9_highbd_subpel_variance.asm b/vp9/encoder/x86/vp9_highbd_subpel_variance.asm
index 987729f96..4594bb1aa 100644
--- a/vp9/encoder/x86/vp9_highbd_subpel_variance.asm
+++ b/vp9/encoder/x86/vp9_highbd_subpel_variance.asm
@@ -14,35 +14,19 @@ SECTION_RODATA
pw_8: times 8 dw 8
bilin_filter_m_sse2: times 8 dw 16
times 8 dw 0
- times 8 dw 15
- times 8 dw 1
times 8 dw 14
times 8 dw 2
- times 8 dw 13
- times 8 dw 3
times 8 dw 12
times 8 dw 4
- times 8 dw 11
- times 8 dw 5
times 8 dw 10
times 8 dw 6
- times 8 dw 9
- times 8 dw 7
times 16 dw 8
- times 8 dw 7
- times 8 dw 9
times 8 dw 6
times 8 dw 10
- times 8 dw 5
- times 8 dw 11
times 8 dw 4
times 8 dw 12
- times 8 dw 3
- times 8 dw 13
times 8 dw 2
times 8 dw 14
- times 8 dw 1
- times 8 dw 15
SECTION .text
diff --git a/vp9/encoder/x86/vp9_subpel_variance.asm b/vp9/encoder/x86/vp9_subpel_variance.asm
index 06b8b034a..292cf34d1 100644
--- a/vp9/encoder/x86/vp9_subpel_variance.asm
+++ b/vp9/encoder/x86/vp9_subpel_variance.asm
@@ -14,52 +14,28 @@ SECTION_RODATA
pw_8: times 8 dw 8
bilin_filter_m_sse2: times 8 dw 16
times 8 dw 0
- times 8 dw 15
- times 8 dw 1
times 8 dw 14
times 8 dw 2
- times 8 dw 13
- times 8 dw 3
times 8 dw 12
times 8 dw 4
- times 8 dw 11
- times 8 dw 5
times 8 dw 10
times 8 dw 6
- times 8 dw 9
- times 8 dw 7
times 16 dw 8
- times 8 dw 7
- times 8 dw 9
times 8 dw 6
times 8 dw 10
- times 8 dw 5
- times 8 dw 11
times 8 dw 4
times 8 dw 12
- times 8 dw 3
- times 8 dw 13
times 8 dw 2
times 8 dw 14
- times 8 dw 1
- times 8 dw 15
bilin_filter_m_ssse3: times 8 db 16, 0
- times 8 db 15, 1
times 8 db 14, 2
- times 8 db 13, 3
times 8 db 12, 4
- times 8 db 11, 5
times 8 db 10, 6
- times 8 db 9, 7
times 16 db 8
- times 8 db 7, 9
times 8 db 6, 10
- times 8 db 5, 11
times 8 db 4, 12
- times 8 db 3, 13
times 8 db 2, 14
- times 8 db 1, 15
SECTION .text
diff --git a/vp9/encoder/x86/vp9_subpel_variance_impl_intrin_avx2.c b/vp9/encoder/x86/vp9_subpel_variance_impl_intrin_avx2.c
index 19ac5c0df..b1c797520 100644
--- a/vp9/encoder/x86/vp9_subpel_variance_impl_intrin_avx2.c
+++ b/vp9/encoder/x86/vp9_subpel_variance_impl_intrin_avx2.c
@@ -17,36 +17,20 @@
DECLARE_ALIGNED(32, static const uint8_t, bilinear_filters_avx2[512]) = {
16, 0, 16, 0, 16, 0, 16, 0, 16, 0, 16, 0, 16, 0, 16, 0,
16, 0, 16, 0, 16, 0, 16, 0, 16, 0, 16, 0, 16, 0, 16, 0,
- 15, 1, 15, 1, 15, 1, 15, 1, 15, 1, 15, 1, 15, 1, 15, 1,
- 15, 1, 15, 1, 15, 1, 15, 1, 15, 1, 15, 1, 15, 1, 15, 1,
14, 2, 14, 2, 14, 2, 14, 2, 14, 2, 14, 2, 14, 2, 14, 2,
14, 2, 14, 2, 14, 2, 14, 2, 14, 2, 14, 2, 14, 2, 14, 2,
- 13, 3, 13, 3, 13, 3, 13, 3, 13, 3, 13, 3, 13, 3, 13, 3,
- 13, 3, 13, 3, 13, 3, 13, 3, 13, 3, 13, 3, 13, 3, 13, 3,
12, 4, 12, 4, 12, 4, 12, 4, 12, 4, 12, 4, 12, 4, 12, 4,
12, 4, 12, 4, 12, 4, 12, 4, 12, 4, 12, 4, 12, 4, 12, 4,
- 11, 5, 11, 5, 11, 5, 11, 5, 11, 5, 11, 5, 11, 5, 11, 5,
- 11, 5, 11, 5, 11, 5, 11, 5, 11, 5, 11, 5, 11, 5, 11, 5,
10, 6, 10, 6, 10, 6, 10, 6, 10, 6, 10, 6, 10, 6, 10, 6,
10, 6, 10, 6, 10, 6, 10, 6, 10, 6, 10, 6, 10, 6, 10, 6,
- 9, 7, 9, 7, 9, 7, 9, 7, 9, 7, 9, 7, 9, 7, 9, 7,
- 9, 7, 9, 7, 9, 7, 9, 7, 9, 7, 9, 7, 9, 7, 9, 7,
8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8,
- 7, 9, 7, 9, 7, 9, 7, 9, 7, 9, 7, 9, 7, 9, 7, 9,
- 7, 9, 7, 9, 7, 9, 7, 9, 7, 9, 7, 9, 7, 9, 7, 9,
6, 10, 6, 10, 6, 10, 6, 10, 6, 10, 6, 10, 6, 10, 6, 10,
6, 10, 6, 10, 6, 10, 6, 10, 6, 10, 6, 10, 6, 10, 6, 10,
- 5, 11, 5, 11, 5, 11, 5, 11, 5, 11, 5, 11, 5, 11, 5, 11,
- 5, 11, 5, 11, 5, 11, 5, 11, 5, 11, 5, 11, 5, 11, 5, 11,
4, 12, 4, 12, 4, 12, 4, 12, 4, 12, 4, 12, 4, 12, 4, 12,
4, 12, 4, 12, 4, 12, 4, 12, 4, 12, 4, 12, 4, 12, 4, 12,
- 3, 13, 3, 13, 3, 13, 3, 13, 3, 13, 3, 13, 3, 13, 3, 13,
- 3, 13, 3, 13, 3, 13, 3, 13, 3, 13, 3, 13, 3, 13, 3, 13,
2, 14, 2, 14, 2, 14, 2, 14, 2, 14, 2, 14, 2, 14, 2, 14,
2, 14, 2, 14, 2, 14, 2, 14, 2, 14, 2, 14, 2, 14, 2, 14,
- 1, 15, 1, 15, 1, 15, 1, 15, 1, 15, 1, 15, 1, 15, 1, 15,
- 1, 15, 1, 15, 1, 15, 1, 15, 1, 15, 1, 15, 1, 15, 1, 15
};
#define FILTER_SRC(filter) \
generated by cgit v1.2.3 (git 2.25.1) at 2024-10-10 15:28:02 +0000