X-Git-Url: http://sigrok.org/gitweb/?a=blobdiff_plain;f=filter.c;fp=filter.c;h=005b8984c8507ccf5a7e32e7e1935f9654d539ce;hb=764e7bbfec52f0530f1f965879b0d81a7fc9acb2;hp=8a00e76dfe5413dd3e22e035e6384776e8c201d3;hpb=c1e45c6511eb4e9023095fc364913db85a092651;p=libsigrok.git

diff --git a/filter.c b/filter.c
index 8a00e76d..005b8984 100644
--- a/filter.c
+++ b/filter.c
@@ -106,7 +106,7 @@ SR_API int sr_filter_probes(unsigned int in_unitsize, unsigned int out_unitsize,
 	unsigned int in_offset, out_offset;
 	int *probelist, out_bit;
 	unsigned int i;
-	uint64_t sample_in, sample_out;
+	uint8_t *sample_in, *sample_out;
 
 	if (!probe_array) {
 		sr_err("%s: probe_array was NULL", __func__);
@@ -151,14 +151,15 @@ SR_API int sr_filter_probes(unsigned int in_unitsize, unsigned int out_unitsize,
 	/* If we reached this point, not all probes are used, so "compress". */
 	in_offset = out_offset = 0;
 	while (in_offset <= length_in - in_unitsize) {
-		memcpy(&sample_in, data_in + in_offset, in_unitsize);
-		sample_out = out_bit = 0;
+		sample_in = data_in + in_offset;
+		sample_out = (*data_out) + out_offset;
+		memset(sample_out, 0, out_unitsize);
+		out_bit = 0;
 		for (i = 0; i < probe_array->len; i++) {
-			if (sample_in & (1 << (probelist[i])))
-				sample_out |= (1 << out_bit);
+			if (sample_in[probelist[i]>>3] & (1 << (probelist[i]&7)))
+				sample_out[out_bit>>3] |= (1 << (out_bit&7));
 			out_bit++;
 		}
-		memcpy((*data_out) + out_offset, &sample_out, out_unitsize);
 		in_offset += in_unitsize;
 		out_offset += out_unitsize;
 	}