sr: new output format 'float', just floating point values

Also outputs FRAME-BEGIN and FRAME-END, if present in the stream.

output/Makefile.am

@@ -29,10 +29,9 @@ libsigrokoutput_la_SOURCES = \
 	gnuplot.c \
 	chronovu_la8.c \
 	csv.c \
+	float.c \
 	output.c
 
-# Temporarily disabled: output_analog.c
-
 libsigrokoutput_la_CFLAGS = \
 	-I$(top_srcdir)
 

output/float.c

@@ -0,0 +1,149 @@
+/*
+ * This file is part of the sigrok project.
+ *
+ * Copyright (C) 2012 Bert Vermeulen <bert@biot.com>
+ *
+ * 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 3 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, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <stdlib.h>
+#include <string.h>
+#include <glib.h>
+#include "config.h"
+#include "sigrok.h"
+#include "sigrok-internal.h"
+
+struct context {
+	unsigned int num_enabled_probes;
+	GPtrArray *probelist;
+};
+
+static int init(struct sr_output *o)
+{
+	struct context *ctx;
+	struct sr_probe *probe;
+	GSList *l;
+
+	if (!o)
+		return SR_ERR_ARG;
+
+	if (!o->dev)
+		return SR_ERR_ARG;
+
+	if (!o->dev->driver)
+		return SR_ERR_ARG;
+
+	if (!(ctx = g_try_malloc0(sizeof(struct context))))
+		return SR_ERR_MALLOC;
+
+	o->internal = ctx;
+
+	/* Get the number of probes and their names. */
+	ctx->probelist = g_ptr_array_new();
+	for (l = o->dev->probes; l; l = l->next) {
+		probe = l->data;
+		if (!probe || !probe->enabled)
+			continue;
+		g_ptr_array_add(ctx->probelist, probe->name);
+		ctx->num_enabled_probes++;
+	}
+
+	return SR_OK;
+}
+
+static int event(struct sr_output *o, int event_type, uint8_t **data_out,
+		 uint64_t *length_out)
+{
+	struct context *ctx;
+
+	if (!o)
+		return SR_ERR_ARG;
+
+	if (!(ctx = o->internal))
+		return SR_ERR_ARG;
+
+	if (!data_out)
+		return SR_ERR_ARG;
+
+	switch (event_type) {
+	case SR_DF_FRAME_BEGIN:
+		*data_out = (uint8_t *)g_strdup("FRAME-BEGIN\n");
+		*length_out = 12;
+		break;
+	case SR_DF_FRAME_END:
+		*data_out = (uint8_t *)g_strdup("FRAME-END\n");
+		*length_out = 10;
+		break;
+	case SR_DF_END:
+		*data_out = NULL;
+		*length_out = 0;
+		g_ptr_array_free(ctx->probelist, TRUE);
+		g_free(o->internal);
+		o->internal = NULL;
+		break;
+	default:
+		/* Ignore everything else. */
+		*data_out = NULL;
+		*length_out = 0;
+		break;
+	}
+
+	return SR_OK;
+}
+
+static int data(struct sr_output *o, const uint8_t *data_in,
+		uint64_t length_in, uint8_t **data_out, uint64_t *length_out)
+{
+	struct context *ctx;
+	GString *outstr;
+	float *fdata;
+	uint64_t max, i;
+	unsigned int j;
+
+	if (!o)
+		return SR_ERR_ARG;
+
+	if (!(ctx = o->internal))
+		return SR_ERR_ARG;
+
+	if (!data_in || !data_out)
+		return SR_ERR_ARG;
+
+	outstr = g_string_sized_new(512);
+
+	fdata = (float *)data_in;
+	max = length_in / sizeof(float);
+	for (i = 0; i < max;) {
+		for (j = 0; j < ctx->num_enabled_probes; j++) {
+			g_string_append_printf(outstr, "%s: %f\n",
+					(char *)g_ptr_array_index(ctx->probelist, j),
+					fdata[i++]);
+		}
+	}
+
+	*data_out = (uint8_t *)outstr->str;
+	*length_out = outstr->len;
+	g_string_free(outstr, FALSE);
+
+	return SR_OK;
+}
+
+SR_PRIV struct sr_output_format output_float = {
+	.id = "float",
+	.description = "Floating point",
+	.df_type = SR_DF_ANALOG,
+	.init = init,
+	.data = data,
+	.event = event,
+};

output/output.c

@@ -29,7 +29,7 @@ extern SR_PRIV struct sr_output_format output_ols;
 extern SR_PRIV struct sr_output_format output_gnuplot;
 extern SR_PRIV struct sr_output_format output_chronovu_la8;
 extern SR_PRIV struct sr_output_format output_csv;
-/* extern SR_PRIV struct sr_output_format output_analog_bits; */
+extern SR_PRIV struct sr_output_format output_float;
 /* extern SR_PRIV struct sr_output_format output_analog_gnuplot; */
 
 static struct sr_output_format *output_module_list[] = {
@@ -42,7 +42,7 @@ static struct sr_output_format *output_module_list[] = {
 	&output_gnuplot,
 	&output_chronovu_la8,
 	&output_csv,
-	/* &output_analog_bits, */
+	&output_float,
 	/* &output_analog_gnuplot, */
 	NULL,
 };