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lavfi/vf_blackdetect: R-V V count_pixels_16

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SpacemiT X60:
blackdetect16_c:                                      7171.0 ( 1.00x)
blackdetect16_rvv_i32:                                 383.6 (18.69x)
This commit is contained in:
Rémi Denis-Courmont
2025-12-15 20:40:24 +02:00
parent 570908af09
commit 7ee5c907e5
2 changed files with 30 additions and 0 deletions
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5
libavfilter/riscv/vf_blackdetect_init.c
View File

@@ -27,6 +27,9 @@
unsigned ff_count_pixels_8_rvv(const uint8_t *src, ptrdiff_t stride,
ptrdiff_t width, ptrdiff_t height,
unsigned threshold);
unsigned ff_count_pixels_16_rvv(const uint8_t *src, ptrdiff_t stride,
ptrdiff_t width, ptrdiff_t height,
unsigned threshold);
ff_blackdetect_fn ff_blackdetect_get_fn_riscv(int depth)
{
@@ -36,6 +39,8 @@ ff_blackdetect_fn ff_blackdetect_get_fn_riscv(int depth)
if (flags & AV_CPU_FLAG_RVV_I32) {
if (depth <= 8)
return ff_count_pixels_8_rvv;
if ((flags & AV_CPU_FLAG_RVB) && (depth <= 16))
return ff_count_pixels_16_rvv;
}
#endif
return NULL;

25
libavfilter/riscv/vf_blackdetect_rvv.S
View File

@@ -43,3 +43,28 @@ func ff_count_pixels_8_rvv, zve32x
mv a0, a5
ret
endfunc
func ff_count_pixels_16_rvv, zve32x, zba
lpad 0
slli t2, a2, 1
mv a5, zero
sub a1, a1, t2
1:
mv t2, a2
addi a3, a3, -1
2:
vsetvli t1, t2, e16, m8, ta, ma
vle16.v v8, (a0)
sub t2, t2, t1
vmsleu.vx v0, v8, a4
sh1add a0, t1, a0
vcpop.m t3, v0
add a5, t3, a5
bnez t2, 2b
add a0, a0, a1
bnez a3, 1b
mv a0, a5
ret
endfunc