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sws/rgb2rgb: RISC-V 64-bit V packed YUYV/UYVY to planar 4:2:2

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This is currently 64-bit only because the stack spilling code would not
assemble on RV32I (and it would corrupt s0 and s1 on RV128I, in theory).

This could be added later in the unlikely that someone wants it.
This commit is contained in:
Rémi Denis-Courmont
2022-09-28 18:30:01 +03:00
committed by Lynne
parent 9181835a24
commit a1bfb5290e
2 changed files with 63 additions and 0 deletions
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10
libswscale/riscv/rgb2rgb.c
View File

@@ -33,6 +33,12 @@ void ff_shuffle_bytes_3210_rvv(const uint8_t *src, uint8_t *dst, int src_len);
void ff_interleave_bytes_rvv(const uint8_t *src1, const uint8_t *src2,
uint8_t *dst, int width, int height, int s1stride,
int s2stride, int dstride);
void ff_uyvytoyuv422_rvv(uint8_t *ydst, uint8_t *udst, uint8_t *vdst,
const uint8_t *src, int width, int height,
int ystride, int uvstride, int src_stride);
void ff_yuyvtoyuv422_rvv(uint8_t *ydst, uint8_t *udst, uint8_t *vdst,
const uint8_t *src, int width, int height,
int ystride, int uvstride, int src_stride);
av_cold void rgb2rgb_init_riscv(void)
{
@@ -46,6 +52,10 @@ av_cold void rgb2rgb_init_riscv(void)
shuffle_bytes_3012 = ff_shuffle_bytes_3012_rvv;
shuffle_bytes_3210 = ff_shuffle_bytes_3210_rvv;
interleaveBytes = ff_interleave_bytes_rvv;
#if (__riscv_xlen == 64)
uyvytoyuv422 = ff_uyvytoyuv422_rvv;
yuyvtoyuv422 = ff_yuyvtoyuv422_rvv;
#endif
}
#endif
}

53
libswscale/riscv/rgb2rgb_rvv.S
View File

@@ -102,3 +102,56 @@ func ff_interleave_bytes_rvv, zve32x
ret
endfunc
#if (__riscv_xlen == 64)
.macro yuy2_to_i422p v_y0, v_y1, v_u, v_v
addi sp, sp, -16
sd s0, (sp)
sd s1, 8(sp)
addi a4, a4, 1
lw s0, 16(sp)
srai a4, a4, 1 // pixel width -> chroma width
li s1, 2
1:
mv t4, a4
mv t3, a3
mv t0, a0
addi t6, a0, 1
mv t1, a1
mv t2, a2
addi a5, a5, -1
2:
vsetvli t5, t4, e8, m1, ta, ma
sub t4, t4, t5
vlseg4e8.v v8, (t3)
sh2add t3, t5, t3
vsse8.v \v_y0, (t0), s1
sh1add t0, t5, t0
vsse8.v \v_y1, (t6), s1
sh1add t6, t5, t6
vse8.v \v_u, (t1)
add t1, t5, t1
vse8.v \v_v, (t2)
add t2, t5, t2
bnez t4, 2b
add a3, a3, s0
add a0, a0, a6
add a1, a1, a7
add a2, a2, a7
bnez a5, 1b
ld s1, 8(sp)
ld s0, (sp)
addi sp, sp, 16
ret
.endm
func ff_uyvytoyuv422_rvv, zve32x
yuy2_to_i422p v9, v11, v8, v10
endfunc
func ff_yuyvtoyuv422_rvv, zve32x
yuy2_to_i422p v8, v10, v9, v11
endfunc
#endif