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Use memcpy for save/restore_predictor

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The save_predictor and restore_predictor functions perform a 1D backup
of the 2D predictor block. Use memcpy to get a faster copy operation
than 4 individual load/stores.

Change-Id: Ia609ed71fbff1ade6fa677186efce9ee29167fd6
This commit is contained in:
John Koleszar
2011-02-15 10:14:18 -05:00
parent 7725a7eb56
commit c40ea3f0c6
1 changed files with 4 additions and 12 deletions
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16
vp8/encoder/rdopt.c
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@@ -589,12 +589,8 @@ static void save_predictor(unsigned char *predictor, unsigned char *dst)
int r, c; int r, c;
for (r = 0; r < 4; r++) for (r = 0; r < 4; r++)
{ {
for (c = 0; c < 4; c++) memcpy(dst, predictor, 4);
{ dst += 4;
*dst = predictor[c];
dst++;
}
predictor += 16; predictor += 16;
} }
} }
@@ -603,12 +599,8 @@ static void restore_predictor(unsigned char *predictor, unsigned char *dst)
int r, c; int r, c;
for (r = 0; r < 4; r++) for (r = 0; r < 4; r++)
{ {
for (c = 0; c < 4; c++) memcpy(predictor, dst, 4);
{ dst += 4;
predictor[c] = *dst;
dst++;
}
predictor += 16; predictor += 16;
} }
} }