lavc/lpc: fix off-by-one in R-V V compute_autocorr

(cherry picked from commit af20fb9c4e) Signed-off-by: Rémi Denis-Courmont <remi@remlab.net>
8 months ago · 449cab7b16
parent 1800213575
commit 449cab7b16
2 changed files with 2 additions and 1 deletions
--- a/libavcodec/riscv/lpc_init.c
+++ b/libavcodec/riscv/lpc_init.c
@ -36,7 +36,7 @@ av_cold void ff_lpc_init_riscv(LPCContext *c)
    if ((flags & AV_CPU_FLAG_RVV_F64) && (flags & AV_CPU_FLAG_RVB_ADDR)) {
        c->lpc_apply_welch_window = ff_lpc_apply_welch_window_rvv;

-        if (ff_get_rv_vlenb() >= c->max_order)
+        if (ff_get_rv_vlenb() > c->max_order)
            c->lpc_compute_autocorr = ff_lpc_compute_autocorr_rvv;
    }
 #endif
--- a/libavcodec/riscv/lpc_rvv.S
+++ b/libavcodec/riscv/lpc_rvv.S
@ -87,6 +87,7 @@ func ff_lpc_apply_welch_window_rvv, zve64d
 endfunc

 func ff_lpc_compute_autocorr_rvv, zve64d
+        addi      a2, a2, 1
        li        t0, 1
        vsetvli   zero, a2, e64, m8, ta, ma
        fcvt.d.l  ft0, t0