+++ /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 samplerate;
- uint64_t samplecount;
- gboolean header_done;
- uint8_t *prevsample;
- int *channel_index;
-};
-
-static const char *gnuplot_header = "\
-# Sample data in space-separated columns format usable by gnuplot.\n";
-static const char *gnuplot_header2 = "\
-#\n# Column\tChannel\n\
-# -----------------------------------------------------------------------------\n\
-# 0\t\tSample counter (for internal gnuplot purposes)\n";
-
-
-static int init(struct sr_output *o, GHashTable *options)
-{
- struct context *ctx;
- struct sr_channel *ch;
- GSList *l;
- unsigned int i;
-
- (void)options;
-
- if (!o || !o->sdi)
- return SR_ERR_ARG;
-
- ctx = g_malloc0(sizeof(struct context));
- o->priv = 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);
-
- /* Once more to map the enabled channels. */
- for (i = 0, l = o->sdi->channels; l; l = l->next) {
- ch = l->data;
- if (ch->type != SR_CHANNEL_LOGIC)
- continue;
- if (!ch->enabled)
- continue;
- ctx->channel_index[i++] = ch->index;
- }
-
- return SR_OK;
-}
-
-static GString *gen_header(const struct sr_output *o)
-{
- struct context *ctx;
- struct sr_channel *ch;
- GVariant *gvar;
- GString *header;
- time_t t;
- unsigned int num_channels, i;
- char *samplerate_s;
-
- ctx = o->priv;
- if (ctx->samplerate == 0) {
- if (sr_config_get(o->sdi->driver, o->sdi, NULL, SR_CONF_SAMPLERATE,
- &gvar) == SR_OK) {
- ctx->samplerate = g_variant_get_uint64(gvar);
- g_variant_unref(gvar);
- }
- }
-
- t = time(NULL);
- header = g_string_sized_new(512);
- g_string_printf(header, "%s", gnuplot_header);
- g_string_append_printf(header, "# Generated by %s on %s",
- PACKAGE_STRING, ctime(&t));
-
- num_channels = g_slist_length(o->sdi->channels);
- g_string_append_printf(header, "# Acquisition with %d/%d channels",
- ctx->num_enabled_channels, num_channels);
- if (ctx->samplerate != 0) {
- samplerate_s = sr_samplerate_string(ctx->samplerate);
- g_string_append_printf(header, " at %s", samplerate_s);
- g_free(samplerate_s);
- }
- g_string_append_printf(header, "\n");
-
- g_string_append_printf(header, "%s", gnuplot_header2);
-
- /* Columns / channels */
- for (i = 0; i < ctx->num_enabled_channels; i++) {
- ch = g_slist_nth_data(o->sdi->channels, ctx->channel_index[i]);
- g_string_append_printf(header, "# %d\t\t%s\n", i + 1, ch->name);
- }
-
- return header;
-}
-
-static int receive(const struct sr_output *o, const struct sr_datafeed_packet *packet,
- GString **out)
-{
- const struct sr_datafeed_meta *meta;
- const struct sr_datafeed_logic *logic;
- const struct sr_config *src;
- GSList *l;
- struct context *ctx;
- const uint8_t *sample;
- unsigned int curbit, p, idx, i;
-
- *out = NULL;
- if (!o || !o->priv)
- return SR_ERR_BUG;
- ctx = o->priv;
-
- if (packet->type == SR_DF_META) {
- meta = packet->payload;
- for (l = meta->config; l; l = l->next) {
- src = l->data;
- if (src->key != SR_CONF_SAMPLERATE)
- continue;
- ctx->samplerate = g_variant_get_uint64(src->data);
- }
- }
-
- 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. */
- ctx->prevsample = g_malloc0(logic->unitsize);
- }
-
- if (!ctx->header_done) {
- *out = gen_header(o);
- ctx->header_done = TRUE;
- } 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->priv)
- return SR_ERR_BUG;
- ctx = o->priv;
- g_free(ctx->channel_index);
- g_free(ctx->prevsample);
- g_free(ctx);
-
- return SR_OK;
-}
-
-SR_PRIV struct sr_output_module output_gnuplot = {
- .id = "gnuplot",
- .name = "Gnuplot",
- .desc = "Gnuplot data file format",
- .exts = (const char*[]){"dat", NULL},
- .options = NULL,
- .init = init,
- .receive = receive,
- .cleanup = cleanup,
-};
projects / libsigrok.git / blobdiff