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adapter: micro optimisations

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Wim Taymans 2009-05-20 11:36:11 +02:00 committed by Wim Taymans
parent 49c4e367e9
commit f3ff7ad055
1 changed files with 7 additions and 11 deletions
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18
libs/gst/base/gstadapter.c
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@ -257,14 +257,14 @@ copy_into_unchecked (GstAdapter * adapter, guint8 * dest, guint skip,
dest += csize; dest += csize;
/* second step, copy remainder */ /* second step, copy remainder */
do { while (size > 0) {
g = g_slist_next (g); g = g_slist_next (g);
buf = g->data; buf = g->data;
csize = MIN (GST_BUFFER_SIZE (buf), size); csize = MIN (GST_BUFFER_SIZE (buf), size);
memcpy (dest, GST_BUFFER_DATA (buf), csize); memcpy (dest, GST_BUFFER_DATA (buf), csize);
size -= csize; size -= csize;
dest += csize; dest += csize;
} while (size > 0); }
} }
/** /**
@ -763,12 +763,10 @@ gst_adapter_masked_scan_uint32 (GstAdapter * adapter, guint32 mask,
/* now find data */ /* now find data */
do { do {
bsize = MIN (bsize, size); bsize = MIN (bsize, size);
for (i = bsize; i; i--) { for (i = 0; i < bsize; i++) {
state = ((state << 8) | *bdata++); state = ((state << 8) | bdata[i]);
if (G_UNLIKELY ((state & mask) == pattern)) { if (G_UNLIKELY ((state & mask) == pattern))
offset += (bsize - i) - 3; return offset + i - 3;
goto found;
}
} }
size -= bsize; size -= bsize;
if (size == 0) if (size == 0)
@ -783,7 +781,5 @@ gst_adapter_masked_scan_uint32 (GstAdapter * adapter, guint32 mask,
} while (TRUE); } while (TRUE);
/* nothing found */ /* nothing found */
offset = -1; return -1;
found:
return offset;
} }