2 * This file is part of the libsigrok project.
4 * Copyright (C) 2015 Uwe Hermann <uwe@hermann-uwe.de>
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License as published by
8 * the Free Software Foundation; either version 2 of the License, or
9 * (at your option) any later version.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
23 #include <libsigrok/libsigrok.h>
24 #include "libsigrok-internal.h"
26 #define LOG_PREFIX "transform/invert"
28 static int receive(const struct sr_transform *t,
29 struct sr_datafeed_packet *packet_in,
30 struct sr_datafeed_packet **packet_out)
32 const struct sr_datafeed_logic *logic;
33 const struct sr_datafeed_analog *analog;
38 if (!t || !t->sdi || !packet_in || !packet_out)
41 switch (packet_in->type) {
43 logic = packet_in->payload;
44 for (i = 0; i <= logic->length - logic->unitsize; i += logic->unitsize) {
45 for (j = 0; j < logic->unitsize; j++) {
46 /* For now invert every bit in every byte. */
47 b = (uint8_t *)logic->data + i + logic->unitsize - 1 - j;
53 analog = packet_in->payload;
54 p = analog->encoding->scale.p;
55 q = analog->encoding->scale.q;
58 analog->encoding->scale.p = (p < 0) ? -q : q;
59 analog->encoding->scale.q = (p < 0) ? -p : p;
62 sr_spew("Unsupported packet type %d, ignoring.", packet_in->type);
66 /* Return the in-place-modified packet. */
67 *packet_out = packet_in;
72 SR_PRIV struct sr_transform_module transform_invert = {
75 .desc = "Invert values",