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, see <http://www.gnu.org/licenses/>.
22 #include <libsigrok/libsigrok.h>
23 #include "libsigrok-internal.h"
25 #define LOG_PREFIX "transform/invert"
27 static int receive(const struct sr_transform *t,
28 struct sr_datafeed_packet *packet_in,
29 struct sr_datafeed_packet **packet_out)
31 const struct sr_datafeed_logic *logic;
32 const struct sr_datafeed_analog *analog;
37 if (!t || !t->sdi || !packet_in || !packet_out)
40 switch (packet_in->type) {
42 logic = packet_in->payload;
43 for (i = 0; i <= logic->length - logic->unitsize; i += logic->unitsize) {
44 for (j = 0; j < logic->unitsize; j++) {
45 /* For now invert every bit in every byte. */
46 b = (uint8_t *)logic->data + i + logic->unitsize - 1 - j;
52 analog = packet_in->payload;
53 p = analog->encoding->scale.p;
54 q = analog->encoding->scale.q;
57 analog->encoding->scale.p = (p < 0) ? -q : q;
58 analog->encoding->scale.q = (p < 0) ? -p : p;
61 sr_spew("Unsupported packet type %d, ignoring.", packet_in->type);
65 /* Return the in-place-modified packet. */
66 *packet_out = packet_in;
71 SR_PRIV struct sr_transform_module transform_invert = {
74 .desc = "Invert values",