projects / libsigrok.git / blame
| Commit | Line | Data |
|---|---|---|
| d74d30bb UH |
1 | /* |
| 2 | * This file is part of the libsigrok project. | |
| 3 | * | |
| 4 | * Copyright (C) 2015 Uwe Hermann <uwe@hermann-uwe.de> | |
| 5 | * | |
| 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. | |
| 10 | * | |
| 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. | |
| 15 | * | |
| 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 | |
| 19 | */ | |
| 20 | ||
| 6ec6c43b | 21 | #include <config.h> |
| d74d30bb | 22 | #include <string.h> |
| c1aae900 | 23 | #include <libsigrok/libsigrok.h> |
| d74d30bb UH |
24 | #include "libsigrok-internal.h" |
| 25 | ||
| 26 | #define LOG_PREFIX "transform/invert" | |
| 27 | ||
| 28 | static int receive(const struct sr_transform *t, | |
| 29 | struct sr_datafeed_packet *packet_in, | |
| 30 | struct sr_datafeed_packet **packet_out) | |
| 31 | { | |
| 32 | const struct sr_datafeed_logic *logic; | |
| edb691fc | 33 | const struct sr_datafeed_analog *analog; |
| d74d30bb | 34 | uint8_t *b; |
| 0662a7d0 ML |
35 | int64_t p; |
| 36 | uint64_t i, j, q; | |
| d74d30bb UH |
37 | |
| 38 | if (!t || !t->sdi || !packet_in || !packet_out) | |
| 39 | return SR_ERR_ARG; | |
| 40 | ||
| 41 | switch (packet_in->type) { | |
| 42 | case SR_DF_LOGIC: | |
| 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; | |
| 48 | *b = ~(*b); | |
| 49 | } | |
| 50 | } | |
| 51 | break; | |
| edb691fc UH |
52 | case SR_DF_ANALOG: |
| 53 | analog = packet_in->payload; | |
| 54 | p = analog->encoding->scale.p; | |
| 55 | q = analog->encoding->scale.q; | |
| 0662a7d0 ML |
56 | if (q > INT64_MAX) |
| 57 | return SR_ERR; | |
| edb691fc UH |
58 | analog->encoding->scale.p = (p < 0) ? -q : q; |
| 59 | analog->encoding->scale.q = (p < 0) ? -p : p; | |
| 0662a7d0 | 60 | break; |
| d74d30bb UH |
61 | default: |
| 62 | sr_spew("Unsupported packet type %d, ignoring.", packet_in->type); | |
| 63 | break; | |
| 64 | } | |
| 65 | ||
| 66 | /* Return the in-place-modified packet. */ | |
| 67 | *packet_out = packet_in; | |
| 68 | ||
| 69 | return SR_OK; | |
| 70 | } | |
| 71 | ||
| 72 | SR_PRIV struct sr_transform_module transform_invert = { | |
| 73 | .id = "invert", | |
| 74 | .name = "Invert", | |
| 75 | .desc = "Invert values", | |
| 76 | .options = NULL, | |
| 77 | .init = NULL, | |
| 78 | .receive = receive, | |
| 79 | .cleanup = NULL, | |
| 80 | }; |