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avcodec/lpc: zero the middle odd sample in the output

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Signed-off-by: James Almer <jamrial@gmail.com>
This commit is contained in:
James Almer 2022-09-22 15:54:22 -03:00
parent c8c4a162fc
commit 0627e6d74c
2 changed files with 8 additions and 3 deletions
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1
libavcodec/lpc.c
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@ -53,6 +53,7 @@ static void lpc_apply_welch_window_c(const int32_t *data, ptrdiff_t len,
w_data[i] = data[i] * w;
w_data[len-1-i] = data[len-1-i] * w;
}
w_data[n2] = 0.0;
return;
}

10
libavcodec/x86/lpc.asm
View File

@ -37,7 +37,7 @@ SECTION .text
%macro APPLY_WELCH_FN 0
cglobal lpc_apply_welch_window, 3, 5, 8, data, len, out, off1, off2
cmp lenq, 0
je .end
je .end_e
cmp lenq, 2
je .two
cmp lenq, 1
@ -104,7 +104,7 @@ cglobal lpc_apply_welch_window, 3, 5, 8, data, len, out, off1, off2
add lend, (mmsize/4 - 1)
cmp lend, 0
je .end
je .end_o
sub lenq, (mmsize/4 - 1)
.scalar_o:
@ -135,6 +135,10 @@ cglobal lpc_apply_welch_window, 3, 5, 8, data, len, out, off1, off2
sub lenq, 2
jg .loop_o_scalar
.end_o:
xorpd xm3, xm3
movlpd [outq + off1q*2], xm3
RET
.even:
@ -233,7 +237,7 @@ cglobal lpc_apply_welch_window, 3, 5, 8, data, len, out, off1, off2
.one:
xorpd xm0, xm0
movhpd [outq], xm0
.end:
.end_e:
RET
%endmacro