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lavc/h264dsp: R-V V 8-bit MBAFF loop filter

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Performance is (unfortunately) the same as with non-MBAFF, since the
hardware under test does not short-circuit vector tail calculations.
(IMO, a generic solution or work-around should be agreed on, rather
than bespoke approaches all over the place.)
This commit is contained in:
Rémi Denis-Courmont
2024-06-30 11:24:43 +03:00
parent 5a6e333fc7
commit e2af5904f0
2 changed files with 18 additions and 0 deletions
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4
libavcodec/riscv/h264dsp_init.c
View File

@@ -31,6 +31,8 @@ void ff_h264_v_loop_filter_luma_8_rvv(uint8_t *pix, ptrdiff_t stride,
int alpha, int beta, int8_t *tc0);
void ff_h264_h_loop_filter_luma_8_rvv(uint8_t *pix, ptrdiff_t stride,
int alpha, int beta, int8_t *tc0);
void ff_h264_h_loop_filter_luma_mbaff_8_rvv(uint8_t *pix, ptrdiff_t stride,
int alpha, int beta, int8_t *tc0);
extern int ff_startcode_find_candidate_rvb(const uint8_t *, int);
extern int ff_startcode_find_candidate_rvv(const uint8_t *, int);
@@ -48,6 +50,8 @@ av_cold void ff_h264dsp_init_riscv(H264DSPContext *dsp, const int bit_depth,
if (bit_depth == 8 && ff_rv_vlen_least(128)) {
dsp->h264_v_loop_filter_luma = ff_h264_v_loop_filter_luma_8_rvv;
dsp->h264_h_loop_filter_luma = ff_h264_h_loop_filter_luma_8_rvv;
dsp->h264_h_loop_filter_luma_mbaff =
ff_h264_h_loop_filter_luma_mbaff_8_rvv;
}
dsp->startcode_find_candidate = ff_startcode_find_candidate_rvv;
}

14
libavcodec/riscv/h264dsp_rvv.S
View File

@@ -138,3 +138,17 @@ func ff_h264_h_loop_filter_luma_8_rvv, zve32x
vssseg6e8.v v8, (a0), a1
ret
endfunc
func ff_h264_h_loop_filter_luma_mbaff_8_rvv, zve32x
vsetivli zero, 4, e16, mf2, ta, ma
vle8.v v4, (a4)
li t0, 0x0101
vzext.vf2 v6, v4
addi a0, a0, -3
vmul.vx v6, v6, t0 # tc_orig
vsetivli zero, 8, e8, m1, ta, ma
vlsseg6e8.v v8, (a0), a1
jal t0, ff_h264_loop_filter_luma_8_rvv
vssseg6e8.v v8, (a0), a1
ret
endfunc