+++ /dev/null
-/*
- * This file is part of the libsigrok project.
- *
- * Copyright (C) 2010 Uwe Hermann <uwe@hermann-uwe.de>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
- */
-
-#include <stdlib.h>
-#include <string.h>
-#include <glib.h>
-#include "config.h" /* Needed for PACKAGE_STRING and others. */
-#include "libsigrok.h"
-#include "libsigrok-internal.h"
-
-#define LOG_PREFIX "output/gnuplot"
-
-struct context {
- unsigned int num_enabled_channels;
- uint64_t samplecount;
- GString *header;
- uint8_t *prevsample;
- int *channel_index;
-};
-
-static const char *gnuplot_header = "\
-# Sample data in space-separated columns format usable by gnuplot\n\
-#\n\
-# Generated by: %s on %s%s\
-# Period: %s\n\
-#\n\
-# Column\tChannel\n\
-# -------------------------------------\
-----------------------------------------\n\
-# 0\t\tSample counter (for internal gnuplot purposes)\n%s\n";
-
-static const char *gnuplot_header_comment = "\
-# Comment: Acquisition with %d/%d channels at %s\n";
-
-static int init(struct sr_output *o)
-{
- struct context *ctx;
- struct sr_channel *ch;
- GSList *l;
- GVariant *gvar;
- uint64_t samplerate;
- unsigned int i, j;
- int num_channels;
- char *c, *frequency_s;
- char wbuf[1000], comment[128];
- time_t t;
-
- if (!o)
- return SR_ERR_ARG;
-
- if (!o->sdi)
- return SR_ERR_ARG;
-
- if (!(ctx = g_malloc0(sizeof(struct context))))
- return SR_ERR_MALLOC;
-
- o->internal = ctx;
- ctx->num_enabled_channels = 0;
- for (l = o->sdi->channels; l; l = l->next) {
- ch = l->data;
- if (ch->type != SR_CHANNEL_LOGIC)
- continue;
- if (!ch->enabled)
- continue;
- ctx->num_enabled_channels++;
- }
- if (ctx->num_enabled_channels <= 0) {
- sr_err("No logic channel enabled.");
- return SR_ERR;
- }
- ctx->channel_index = g_malloc(sizeof(int) * ctx->num_enabled_channels);
-
- num_channels = g_slist_length(o->sdi->channels);
- comment[0] = '\0';
- samplerate = 0;
- if (sr_config_get(o->sdi->driver, o->sdi, NULL, SR_CONF_SAMPLERATE,
- &gvar) == SR_OK) {
- samplerate = g_variant_get_uint64(gvar);
- g_variant_unref(gvar);
- if (!(frequency_s = sr_samplerate_string(samplerate))) {
- sr_err("%s: sr_samplerate_string failed", __func__);
- g_free(ctx);
- return SR_ERR;
- }
- snprintf(comment, 127, gnuplot_header_comment,
- ctx->num_enabled_channels, num_channels, frequency_s);
- g_free(frequency_s);
- }
-
- /* Columns / channels */
- wbuf[0] = '\0';
- for (i = 0, j = 0, l = o->sdi->channels; l; l = l->next, i++) {
- ch = l->data;
- if (ch->type != SR_CHANNEL_LOGIC)
- continue;
- if (!ch->enabled)
- continue;
- c = (char *)&wbuf + strlen((const char *)&wbuf);
- sprintf(c, "# %d\t\t%s\n", i + 1, ch->name);
- /* Remember the enabled channel's index while we're at it. */
- ctx->channel_index[j++] = i;
- }
-
- if (!(frequency_s = sr_period_string(samplerate))) {
- sr_err("%s: sr_period_string failed", __func__);
- g_free(ctx);
- return SR_ERR;
- }
-
- t = time(NULL);
- ctx->header = g_string_sized_new(512);
- g_string_printf(ctx->header, gnuplot_header, PACKAGE_STRING,
- ctime(&t), comment, frequency_s, (char *)&wbuf);
- g_free(frequency_s);
-
- return 0;
-}
-
-static int receive(struct sr_output *o, const struct sr_dev_inst *sdi,
- const struct sr_datafeed_packet *packet, GString **out)
-{
- const struct sr_datafeed_logic *logic;
- struct context *ctx;
- const uint8_t *sample;
- unsigned int curbit, p, idx, i;
-
- (void)sdi;
-
- *out = NULL;
- if (!o || !o->internal)
- return SR_ERR_BUG;
- ctx = o->internal;
-
- if (packet->type != SR_DF_LOGIC)
- return SR_OK;
- logic = packet->payload;
-
- if (!ctx->prevsample) {
- /* Can't allocate this until we know the stream's unitsize. */
- if (!(ctx->prevsample = g_malloc0(logic->unitsize))) {
- g_free(ctx);
- sr_err("%s: ctx->prevsample malloc failed", __func__);
- return SR_ERR_MALLOC;
- }
- }
-
- if (ctx->header) {
- /* The header is still here, this must be the first packet. */
- *out = ctx->header;
- ctx->header = NULL;
- ctx->samplecount = 0;
- } else {
- *out = g_string_sized_new(512);
- }
-
- for (i = 0; i <= logic->length - logic->unitsize; i += logic->unitsize) {
- sample = logic->data + i;
- ctx->samplecount++;
-
- /*
- * Don't output the same sample multiple times, but make
- * sure to output at least the first and last sample.
- */
- if (i > 0 && i < logic->length - logic->unitsize) {
- if (!memcmp(sample, ctx->prevsample, logic->unitsize))
- continue;
- }
- memcpy(ctx->prevsample, sample, logic->unitsize);
-
- /* The first column is a counter (needed for gnuplot). */
- g_string_append_printf(*out, "%" PRIu64 "\t", ctx->samplecount);
-
- /* The next columns are the values of all channels. */
- for (p = 0; p < ctx->num_enabled_channels; p++) {
- idx = ctx->channel_index[p];
- curbit = (sample[idx / 8] & ((uint8_t) (1 << (idx % 8)))) >> (idx % 8);
- g_string_append_printf(*out, "%d ", curbit);
- }
- g_string_append_printf(*out, "\n");
- }
-
- return SR_OK;
-}
-
-static int cleanup(struct sr_output *o)
-{
- struct context *ctx;
-
- if (!o || !o->internal)
- return SR_ERR_BUG;
- ctx = o->internal;
- g_free(ctx->channel_index);
- g_free(ctx->prevsample);
- if (ctx->header)
- g_string_free(ctx->header, TRUE);
- g_free(ctx);
-
- return SR_OK;
-}
-
-SR_PRIV struct sr_output_format output_gnuplot = {
- .id = "gnuplot",
- .description = "Gnuplot",
- .init = init,
- .receive = receive,
- .cleanup = cleanup,
-};
projects / libsigrok.git / blobdiff