[libsigrok.git] / output / gnuplot.c

/*
 * This file is part of the sigrok 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"
#include "libsigrok.h"
#include "libsigrok-internal.h"

struct context {
	unsigned int num_enabled_probes;
	unsigned int unitsize;
	char *probelist[SR_MAX_NUM_PROBES + 1];
	char *header;
};

#define MAX_HEADER_LEN \
	(1024 + (SR_MAX_NUM_PROBES * (SR_MAX_PROBENAME_LEN + 10)))

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\tProbe\n\
# -------------------------------------\
----------------------------------------\n\
# 0\t\tSample counter (for internal gnuplot purposes)\n%s\n";

static const char *gnuplot_header_comment = "\
# Comment: Acquisition with %d/%d probes at %s\n";

static int init(struct sr_output *o)
{
	struct context *ctx;
	struct sr_probe *probe;
	GSList *l;
	uint64_t samplerate;
	unsigned int i;
	int b, num_probes;
	char *c, *frequency_s;
	char wbuf[1000], comment[128];
	time_t t;

	if (!o) {
		sr_err("gnuplot out: %s: o was NULL", __func__);
		return SR_ERR_ARG;
	}

	if (!o->dev) {
		sr_err("gnuplot out: %s: o->dev was NULL", __func__);
		return SR_ERR_ARG;
	}

	if (!o->dev->driver) {
		sr_err("gnuplot out: %s: o->dev->driver was NULL", __func__);
		return SR_ERR_ARG;
	}

	if (!(ctx = g_try_malloc0(sizeof(struct context)))) {
		sr_err("gnuplot out: %s: ctx malloc failed", __func__);
		return SR_ERR_MALLOC;
	}

	if (!(ctx->header = g_try_malloc0(MAX_HEADER_LEN + 1))) {
		sr_err("gnuplot out: %s: ctx->header malloc failed", __func__);
		g_free(ctx);
		return SR_ERR_MALLOC;
	}

	o->internal = ctx;
	ctx->num_enabled_probes = 0;
	for (l = o->dev->probes; l; l = l->next) {
		probe = l->data; /* TODO: Error checks. */
		if (!probe->enabled)
			continue;
		ctx->probelist[ctx->num_enabled_probes++] = probe->name;
	}
	ctx->probelist[ctx->num_enabled_probes] = 0;
	ctx->unitsize = (ctx->num_enabled_probes + 7) / 8;

	num_probes = g_slist_length(o->dev->probes);
	comment[0] = '\0';
	if (sr_dev_has_hwcap(o->dev, SR_HWCAP_SAMPLERATE)) {
		samplerate = *((uint64_t *) o->dev->driver->dev_info_get(
				o->dev->driver_index, SR_DI_CUR_SAMPLERATE));
		if (!(frequency_s = sr_samplerate_string(samplerate))) {
			sr_err("gnuplot out: %s: sr_samplerate_string failed",
			       __func__);
			g_free(ctx->header);
			g_free(ctx);
			return SR_ERR;
		}
		snprintf(comment, 127, gnuplot_header_comment,
			ctx->num_enabled_probes, num_probes, frequency_s);
		g_free(frequency_s);
	}

	/* Columns / channels */
	wbuf[0] = '\0';
	for (i = 0; i < ctx->num_enabled_probes; i++) {
		c = (char *)&wbuf + strlen((const char *)&wbuf);
		sprintf(c, "# %d\t\t%s\n", i + 1, ctx->probelist[i]);
	}

	if (!(frequency_s = sr_period_string(samplerate))) {
		sr_err("gnuplot out: %s: sr_period_string failed", __func__);
		g_free(ctx->header);
		g_free(ctx);
		return SR_ERR;
	}

	t = time(NULL);
	b = snprintf(ctx->header, MAX_HEADER_LEN, gnuplot_header,
		     PACKAGE_STRING, ctime(&t), comment, frequency_s,
		     (char *)&wbuf);
	g_free(frequency_s);

	if (b < 0) {
		sr_err("gnuplot out: %s: sprintf failed", __func__);
		g_free(ctx->header);
		g_free(ctx);
		return SR_ERR;
	}

	return 0;
}

static int event(struct sr_output *o, int event_type, uint8_t **data_out,
		 uint64_t *length_out)
{
	if (!o) {
		sr_err("gnuplot out: %s: o was NULL", __func__);
		return SR_ERR_ARG;
	}

	if (!data_out) {
		sr_err("gnuplot out: %s: data_out was NULL", __func__);
		return SR_ERR_ARG;
	}

	if (!length_out) {
		sr_err("gnuplot out: %s: length_out was NULL", __func__);
		return SR_ERR_ARG;
	}

	switch (event_type) {
	case SR_DF_TRIGGER:
		/* TODO: Can a trigger mark be in a gnuplot data file? */
		break;
	case SR_DF_END:
		g_free(o->internal);
		o->internal = NULL;
		break;
	default:
		sr_err("gnuplot out: %s: unsupported event type: %d",
		       __func__, event_type);
		break;
	}

	*data_out = NULL;
	*length_out = 0;

	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;
	unsigned int max_linelen, outsize, p, curbit, i;
	uint64_t sample;
	static uint64_t samplecount = 0, old_sample = 0;
	uint8_t *outbuf, *c;

	if (!o) {
		sr_err("gnuplot out: %s: o was NULL", __func__);
		return SR_ERR_ARG;
	}

	if (!o->internal) {
		sr_err("gnuplot out: %s: o->internal was NULL", __func__);
		return SR_ERR_ARG;
	}

	if (!data_in) {
		sr_err("gnuplot out: %s: data_in was NULL", __func__);
		return SR_ERR_ARG;
	}

	if (!data_out) {
		sr_err("gnuplot out: %s: data_out was NULL", __func__);
		return SR_ERR_ARG;
	}

	if (!length_out) {
		sr_err("gnuplot out: %s: length_out was NULL", __func__);
		return SR_ERR_ARG;
	}

	ctx = o->internal;
	max_linelen = 16 + ctx->num_enabled_probes * 2;
	outsize = length_in / ctx->unitsize * max_linelen;
	if (ctx->header)
		outsize += strlen(ctx->header);

	if (!(outbuf = g_try_malloc0(outsize))) {
		sr_err("gnuplot out: %s: outbuf malloc failed", __func__);
		return SR_ERR_MALLOC;
	}

	outbuf[0] = '\0';
	if (ctx->header) {
		/* The header is still here, this must be the first packet. */
		strncpy((char *)outbuf, ctx->header, outsize);
		g_free(ctx->header);
		ctx->header = NULL;
	}

	for (i = 0; i <= length_in - ctx->unitsize; i += ctx->unitsize) {

		memcpy(&sample, data_in + i, ctx->unitsize);

		/*
		 * Don't output the same samples multiple times. However, make
		 * sure to output at least the first and last sample.
		 */
		if (samplecount++ != 0 && sample == old_sample) {
			if (i != (length_in - ctx->unitsize))
				continue;
		}
		old_sample = sample;

		/* The first column is a counter (needed for gnuplot). */
		c = outbuf + strlen((const char *)outbuf);
		sprintf((char *)c, "%" PRIu64 "\t", samplecount++);

		/* The next columns are the values of all channels. */
		for (p = 0; p < ctx->num_enabled_probes; p++) {
			curbit = (sample & ((uint64_t) (1 << p))) >> p;
			c = outbuf + strlen((const char *)outbuf);
			sprintf((char *)c, "%d ", curbit);
		}

		c = outbuf + strlen((const char *)outbuf);
		sprintf((char *)c, "\n");
	}

	*data_out = outbuf;
	*length_out = strlen((const char *)outbuf);

	return SR_OK;
}

SR_PRIV struct sr_output_format output_gnuplot = {
	.id = "gnuplot",
	.description = "Gnuplot",
	.df_type = SR_DF_LOGIC,
	.init = init,
	.data = data,
	.event = event,
};

/* Temporarily disabled. */
#if 0
static int analog_init(struct sr_output *o)
{
	struct context *ctx;
	struct sr_probe *probe;
	GSList *l;
	uint64_t samplerate;
	unsigned int i;
	int b, num_probes;
	char *c, *frequency_s;
	char wbuf[1000], comment[128];
	time_t t;

	if (!(ctx = g_try_malloc0(sizeof(struct context)))) {
		sr_err("gnuplot out: %s: ctx malloc failed", __func__);
		return SR_ERR_MALLOC;
	}

	if (!(ctx->header = g_try_malloc0(MAX_HEADER_LEN + 1))) {
		g_free(ctx);
		sr_err("gnuplot out: %s: ctx->header malloc failed", __func__);
		return SR_ERR_MALLOC;
	}

	o->internal = ctx;
	ctx->num_enabled_probes = 0;
	for (l = o->dev->probes; l; l = l->next) {
		probe = l->data;
		if (!probe->enabled)
			continue;
		ctx->probelist[ctx->num_enabled_probes++] = probe->name;
	}
	ctx->probelist[ctx->num_enabled_probes] = 0;
//	ctx->unitsize = (ctx->num_enabled_probes + 7) / 8;
	ctx->unitsize = sizeof(struct sr_analog_sample) +
			(ctx->num_enabled_probes * sizeof(struct sr_analog_probe));

	num_probes = g_slist_length(o->dev->probes);
	comment[0] = '\0';
	if (o->dev->driver && sr_dev_has_hwcap(o->dev, SR_HWCAP_SAMPLERATE)) {
		samplerate = *((uint64_t *) o->dev->driver->dev_info_get(
				o->dev->driver_index, SR_DI_CUR_SAMPLERATE));
		if (!(frequency_s = sr_samplerate_string(samplerate))) {
			g_free(ctx->header);
			g_free(ctx);
			return SR_ERR;
		}
		snprintf(comment, 127, gnuplot_header_comment,
			ctx->num_enabled_probes, num_probes, frequency_s);
		g_free(frequency_s);
	}

	/* Columns / channels */
	wbuf[0] = '\0';
	for (i = 0; i < ctx->num_enabled_probes; i++) {
		c = (char *)&wbuf + strlen((char *)&wbuf);
		sprintf(c, "# %d\t\t%s\n", i + 1, ctx->probelist[i]);
	}

	if (!(frequency_s = sr_period_string(samplerate))) {
		g_free(ctx->header);
		g_free(ctx);
		return SR_ERR;
	}
	t = time(NULL);
	b = snprintf(ctx->header, MAX_HEADER_LEN, gnuplot_header,
		     PACKAGE_STRING, ctime(&t), comment, frequency_s,
		     (char *)&wbuf);
	g_free(frequency_s);

	if (b < 0) {
		g_free(ctx->header);
		g_free(ctx);
		return SR_ERR;
	}

	return 0;
}

static int analog_data(struct sr_output *o, uint8_t *data_in,
		       uint64_t length_in, uint8_t **data_out,
		       uint64_t *length_out)
{
	struct context *ctx;
	unsigned int max_linelen, outsize, p, /* curbit, */ i;
//	uint64_t sample;
	static uint64_t samplecount = 0;
	uint8_t *outbuf, *c;
	struct sr_analog_sample *sample;

	ctx = o->internal;
//	max_linelen = 16 + ctx->num_enabled_probes * 2;
	max_linelen = 16 + ctx->num_enabled_probes * 30;
	outsize = length_in / ctx->unitsize * max_linelen;
	if (ctx->header)
		outsize += strlen(ctx->header);

	if (!(outbuf = g_try_malloc0(outsize))) {
		sr_err("gnuplot out: %s: outbuf malloc failed", __func__);
		return SR_ERR_MALLOC;
	}

	outbuf[0] = '\0';
	if (ctx->header) {
		/* The header is still here, this must be the first packet. */
		strncpy(outbuf, ctx->header, outsize);
		g_free(ctx->header);
		ctx->header = NULL;
	}

	for (i = 0; i <= length_in - ctx->unitsize; i += ctx->unitsize) {
//		memcpy(&sample, data_in + i, ctx->unitsize);
		sample = (struct sr_analog_sample *) (data_in + i);

		/* The first column is a counter (needed for gnuplot). */
		c = outbuf + strlen(outbuf);
		sprintf(c, "%" PRIu64 "\t", samplecount++);

		/* The next columns are the values of all channels. */
		for (p = 0; p < ctx->num_enabled_probes; p++) {
//			curbit = (sample & ((uint64_t) (1 << p))) >> p;
			c = outbuf + strlen(outbuf);
//			sprintf(c, "%d ", curbit);
			/*
			 * FIXME: Should be doing proper raw->voltage conversion
			 * here, casting to int16_t isn't it. Remember that if
			 * res = 1 conversion isn't necessary.
			 */
			sprintf(c, "%f ", (double) ((int16_t) (sample->probes[p].val &
					((1 << sample->probes[p].res) - 1))));
		}

		c = outbuf + strlen(outbuf);
		sprintf(c, "\n");
	}

	*data_out = outbuf;
	*length_out = strlen(outbuf);

	return SR_OK;
}

struct sr_output_format output_analog_gnuplot = {
	.id = "analog_gnuplot",
	.description = "Gnuplot analog",
	.df_type = SR_DF_ANALOG,
	.init = analog_init,
	.data = analog_data,
	.event = event,
};
#endif
Commit	Line	Data
e2ad47b5 UH	1	/*
	2	* This file is part of the sigrok project.
	3	*
	4	* Copyright (C) 2010 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
	21	#include <stdlib.h>
	22	#include <string.h>
	23	#include <glib.h>
1a081ca6	24	#include "config.h"
45c59c8b BV	25	#include "libsigrok.h"
45c59c8b BV	26	#include "libsigrok-internal.h"
e2ad47b5 UH	27
e2ad47b5 UH	28	struct context {
afc8e4de UH	29	unsigned int num_enabled_probes;
afc8e4de UH	30	unsigned int unitsize;
9688b443	31	char *probelist[SR_MAX_NUM_PROBES + 1];
e2ad47b5 UH	32	char *header;
	33	};
	34
9688b443 UH	35	#define MAX_HEADER_LEN \
	36	(1024 + (SR_MAX_NUM_PROBES * (SR_MAX_PROBENAME_LEN + 10)))
	37
d078d2e5	38	static const char *gnuplot_header = "\
e2ad47b5 UH	39	# Sample data in space-separated columns format usable by gnuplot\n\
e2ad47b5 UH	40	#\n\
5cca9adb	41	# Generated by: %s on %s%s\
d4ae8eaa	42	# Period: %s\n\
114fb93f UH	43	#\n\
	44	# Column\tProbe\n\
	45	# -------------------------------------\
	46	----------------------------------------\n\
	47	# 0\t\tSample counter (for internal gnuplot purposes)\n%s\n";
e2ad47b5	48
d078d2e5	49	static const char *gnuplot_header_comment = "\
7aae7462 BV	50	# Comment: Acquisition with %d/%d probes at %s\n";
7aae7462 BV	51
f50f3f40	52	static int init(struct sr_output *o)
e2ad47b5	53	{
e2ad47b5	54	struct context *ctx;
1afe8989	55	struct sr_probe *probe;
e2ad47b5 UH	56	GSList *l;
e2ad47b5 UH	57	uint64_t samplerate;
afc8e4de UH	58	unsigned int i;
afc8e4de UH	59	int b, num_probes;
d4ae8eaa	60	char c, frequency_s;
7aae7462	61	char wbuf[1000], comment[128];
5cca9adb	62	time_t t;
e2ad47b5	63
20ebd1fe	64	if (!o) {
133a37bf	65	sr_err("gnuplot out: %s: o was NULL", __func__);
20ebd1fe UH	66	return SR_ERR_ARG;
	67	}
	68
bb7ef793 UH	69	if (!o->dev) {
bb7ef793 UH	70	sr_err("gnuplot out: %s: o->dev was NULL", __func__);
20ebd1fe UH	71	return SR_ERR_ARG;
	72	}
	73
c09f0b57 UH	74	if (!o->dev->driver) {
c09f0b57 UH	75	sr_err("gnuplot out: %s: o->dev->driver was NULL", __func__);
20ebd1fe UH	76	return SR_ERR_ARG;
	77	}
	78
133a37bf UH	79	if (!(ctx = g_try_malloc0(sizeof(struct context)))) {
133a37bf UH	80	sr_err("gnuplot out: %s: ctx malloc failed", __func__);
e46b8fb1	81	return SR_ERR_MALLOC;
20ebd1fe	82	}
a821069b	83
133a37bf UH	84	if (!(ctx->header = g_try_malloc0(MAX_HEADER_LEN + 1))) {
	85	sr_err("gnuplot out: %s: ctx->header malloc failed", __func__);
	86	g_free(ctx);
e46b8fb1	87	return SR_ERR_MALLOC;
d4ae8eaa BV	88	}
d4ae8eaa BV	89
e2ad47b5 UH	90	o->internal = ctx;
e2ad47b5 UH	91	ctx->num_enabled_probes = 0;
bb7ef793	92	for (l = o->dev->probes; l; l = l->next) {
20ebd1fe	93	probe = l->data; /* TODO: Error checks. */
757b8c62 UH	94	if (!probe->enabled)
	95	continue;
	96	ctx->probelist[ctx->num_enabled_probes++] = probe->name;
e2ad47b5	97	}
e2ad47b5 UH	98	ctx->probelist[ctx->num_enabled_probes] = 0;
	99	ctx->unitsize = (ctx->num_enabled_probes + 7) / 8;
	100
bb7ef793	101	num_probes = g_slist_length(o->dev->probes);
a821069b	102	comment[0] = '\0';
bb7ef793	103	if (sr_dev_has_hwcap(o->dev, SR_HWCAP_SAMPLERATE)) {
c09f0b57 UH	104	samplerate = ((uint64_t ) o->dev->driver->dev_info_get(
c09f0b57 UH	105	o->dev->driver_index, SR_DI_CUR_SAMPLERATE));
a00ba012	106	if (!(frequency_s = sr_samplerate_string(samplerate))) {
133a37bf UH	107	sr_err("gnuplot out: %s: sr_samplerate_string failed",
	108	__func__);
	109	g_free(ctx->header);
	110	g_free(ctx);
e46b8fb1	111	return SR_ERR;
a821069b UH	112	}
a821069b UH	113	snprintf(comment, 127, gnuplot_header_comment,
d4ae8eaa	114	ctx->num_enabled_probes, num_probes, frequency_s);
133a37bf	115	g_free(frequency_s);
7aae7462	116	}
e2ad47b5 UH	117
	118	/* Columns / channels */
	119	wbuf[0] = '\0';
	120	for (i = 0; i < ctx->num_enabled_probes; i++) {
054e6709	121	c = (char )&wbuf + strlen((const char )&wbuf);
114fb93f	122	sprintf(c, "# %d\t\t%s\n", i + 1, ctx->probelist[i]);
e2ad47b5 UH	123	}
e2ad47b5 UH	124
a00ba012	125	if (!(frequency_s = sr_period_string(samplerate))) {
133a37bf UH	126	sr_err("gnuplot out: %s: sr_period_string failed", __func__);
	127	g_free(ctx->header);
	128	g_free(ctx);
e46b8fb1	129	return SR_ERR;
d4ae8eaa	130	}
20ebd1fe	131
5cca9adb	132	t = time(NULL);
e2ad47b5	133	b = snprintf(ctx->header, MAX_HEADER_LEN, gnuplot_header,
d4ae8eaa	134	PACKAGE_STRING, ctime(&t), comment, frequency_s,
5cca9adb	135	(char *)&wbuf);
133a37bf	136	g_free(frequency_s);
e2ad47b5	137
d4ae8eaa	138	if (b < 0) {
133a37bf UH	139	sr_err("gnuplot out: %s: sprintf failed", __func__);
	140	g_free(ctx->header);
	141	g_free(ctx);
e46b8fb1	142	return SR_ERR;
d4ae8eaa	143	}
e2ad47b5 UH	144
	145	return 0;
	146	}
	147
054e6709	148	static int event(struct sr_output o, int event_type, uint8_t *data_out,
e2ad47b5 UH	149	uint64_t *length_out)
e2ad47b5 UH	150	{
20ebd1fe	151	if (!o) {
133a37bf	152	sr_err("gnuplot out: %s: o was NULL", __func__);
20ebd1fe UH	153	return SR_ERR_ARG;
	154	}
	155
	156	if (!data_out) {
133a37bf	157	sr_err("gnuplot out: %s: data_out was NULL", __func__);
20ebd1fe UH	158	return SR_ERR_ARG;
	159	}
	160
	161	if (!length_out) {
133a37bf	162	sr_err("gnuplot out: %s: length_out was NULL", __func__);
20ebd1fe UH	163	return SR_ERR_ARG;
	164	}
	165
99c1fc59	166	switch (event_type) {
5a2326a7	167	case SR_DF_TRIGGER:
20ebd1fe	168	/* TODO: Can a trigger mark be in a gnuplot data file? */
e2ad47b5	169	break;
5a2326a7	170	case SR_DF_END:
133a37bf	171	g_free(o->internal);
e2ad47b5 UH	172	o->internal = NULL;
e2ad47b5 UH	173	break;
20ebd1fe	174	default:
133a37bf UH	175	sr_err("gnuplot out: %s: unsupported event type: %d",
133a37bf UH	176	__func__, event_type);
20ebd1fe	177	break;
e2ad47b5 UH	178	}
e2ad47b5 UH	179
9ab95e54 BV	180	*data_out = NULL;
	181	*length_out = 0;
	182
e46b8fb1	183	return SR_OK;
e2ad47b5 UH	184	}
e2ad47b5 UH	185
054e6709 UH	186	static int data(struct sr_output o, const uint8_t data_in,
054e6709 UH	187	uint64_t length_in, uint8_t *data_out, uint64_t length_out)
e2ad47b5 UH	188	{
e2ad47b5 UH	189	struct context *ctx;
d4ae8eaa	190	unsigned int max_linelen, outsize, p, curbit, i;
086eac7c	191	uint64_t sample;
50959ddc	192	static uint64_t samplecount = 0, old_sample = 0;
054e6709	193	uint8_t outbuf, c;
e2ad47b5	194
20ebd1fe	195	if (!o) {
133a37bf	196	sr_err("gnuplot out: %s: o was NULL", __func__);
20ebd1fe UH	197	return SR_ERR_ARG;
	198	}
	199
	200	if (!o->internal) {
133a37bf	201	sr_err("gnuplot out: %s: o->internal was NULL", __func__);
20ebd1fe UH	202	return SR_ERR_ARG;
	203	}
	204
	205	if (!data_in) {
133a37bf	206	sr_err("gnuplot out: %s: data_in was NULL", __func__);
20ebd1fe UH	207	return SR_ERR_ARG;
	208	}
	209
	210	if (!data_out) {
133a37bf	211	sr_err("gnuplot out: %s: data_out was NULL", __func__);
20ebd1fe UH	212	return SR_ERR_ARG;
	213	}
	214
	215	if (!length_out) {
133a37bf	216	sr_err("gnuplot out: %s: length_out was NULL", __func__);
20ebd1fe UH	217	return SR_ERR_ARG;
	218	}
	219
e2ad47b5	220	ctx = o->internal;
d4ae8eaa BV	221	max_linelen = 16 + ctx->num_enabled_probes * 2;
d4ae8eaa BV	222	outsize = length_in / ctx->unitsize * max_linelen;
e273a904	223	if (ctx->header)
d4ae8eaa	224	outsize += strlen(ctx->header);
a821069b	225
133a37bf UH	226	if (!(outbuf = g_try_malloc0(outsize))) {
133a37bf UH	227	sr_err("gnuplot out: %s: outbuf malloc failed", __func__);
e46b8fb1	228	return SR_ERR_MALLOC;
20ebd1fe	229	}
a821069b UH	230
a821069b UH	231	outbuf[0] = '\0';
e2ad47b5 UH	232	if (ctx->header) {
e2ad47b5 UH	233	/* The header is still here, this must be the first packet. */
054e6709	234	strncpy((char *)outbuf, ctx->header, outsize);
133a37bf	235	g_free(ctx->header);
e2ad47b5	236	ctx->header = NULL;
e2ad47b5 UH	237	}
e2ad47b5 UH	238
607b58de	239	for (i = 0; i <= length_in - ctx->unitsize; i += ctx->unitsize) {
50959ddc	240
607b58de	241	memcpy(&sample, data_in + i, ctx->unitsize);
e2ad47b5	242
50959ddc UH	243	/*
	244	* Don't output the same samples multiple times. However, make
	245	* sure to output at least the first and last sample.
	246	*/
	247	if (samplecount++ != 0 && sample == old_sample) {
	248	if (i != (length_in - ctx->unitsize))
	249	continue;
	250	}
	251	old_sample = sample;
	252
e2ad47b5	253	/* The first column is a counter (needed for gnuplot). */
054e6709 UH	254	c = outbuf + strlen((const char *)outbuf);
054e6709 UH	255	sprintf((char *)c, "%" PRIu64 "\t", samplecount++);
e2ad47b5 UH	256
	257	/* The next columns are the values of all channels. */
	258	for (p = 0; p < ctx->num_enabled_probes; p++) {
fbe2f794	259	curbit = (sample & ((uint64_t) (1 << p))) >> p;
054e6709 UH	260	c = outbuf + strlen((const char *)outbuf);
054e6709 UH	261	sprintf((char *)c, "%d ", curbit);
e2ad47b5 UH	262	}
e2ad47b5 UH	263
054e6709 UH	264	c = outbuf + strlen((const char *)outbuf);
054e6709 UH	265	sprintf((char *)c, "\n");
e2ad47b5 UH	266	}
	267
	268	*data_out = outbuf;
054e6709	269	length_out = strlen((const char )outbuf);
e2ad47b5	270
e46b8fb1	271	return SR_OK;
e2ad47b5 UH	272	}
e2ad47b5 UH	273
7c1d391c	274	SR_PRIV struct sr_output_format output_gnuplot = {
cdb3573c	275	.id = "gnuplot",
d494a4aa UH	276	.description = "Gnuplot",
	277	.df_type = SR_DF_LOGIC,
	278	.init = init,
	279	.data = data,
	280	.event = event,
77b45442 UH	281	};
	282
	283	/* Temporarily disabled. */
	284	#if 0
f50f3f40	285	static int analog_init(struct sr_output *o)
81bbdf6a DR	286	{
81bbdf6a DR	287	struct context *ctx;
1afe8989	288	struct sr_probe *probe;
81bbdf6a DR	289	GSList *l;
	290	uint64_t samplerate;
	291	unsigned int i;
	292	int b, num_probes;
	293	char c, frequency_s;
	294	char wbuf[1000], comment[128];
	295	time_t t;
	296
133a37bf UH	297	if (!(ctx = g_try_malloc0(sizeof(struct context)))) {
133a37bf UH	298	sr_err("gnuplot out: %s: ctx malloc failed", __func__);
e46b8fb1	299	return SR_ERR_MALLOC;
133a37bf	300	}
81bbdf6a	301
133a37bf UH	302	if (!(ctx->header = g_try_malloc0(MAX_HEADER_LEN + 1))) {
	303	g_free(ctx);
	304	sr_err("gnuplot out: %s: ctx->header malloc failed", __func__);
e46b8fb1	305	return SR_ERR_MALLOC;
81bbdf6a DR	306	}
	307
	308	o->internal = ctx;
	309	ctx->num_enabled_probes = 0;
bb7ef793	310	for (l = o->dev->probes; l; l = l->next) {
81bbdf6a DR	311	probe = l->data;
	312	if (!probe->enabled)
	313	continue;
	314	ctx->probelist[ctx->num_enabled_probes++] = probe->name;
	315	}
	316	ctx->probelist[ctx->num_enabled_probes] = 0;
	317	// ctx->unitsize = (ctx->num_enabled_probes + 7) / 8;
809c5f20 UH	318	ctx->unitsize = sizeof(struct sr_analog_sample) +
809c5f20 UH	319	(ctx->num_enabled_probes * sizeof(struct sr_analog_probe));
81bbdf6a	320
bb7ef793	321	num_probes = g_slist_length(o->dev->probes);
81bbdf6a	322	comment[0] = '\0';
c09f0b57 UH	323	if (o->dev->driver && sr_dev_has_hwcap(o->dev, SR_HWCAP_SAMPLERATE)) {
	324	samplerate = ((uint64_t ) o->dev->driver->dev_info_get(
	325	o->dev->driver_index, SR_DI_CUR_SAMPLERATE));
a00ba012	326	if (!(frequency_s = sr_samplerate_string(samplerate))) {
133a37bf UH	327	g_free(ctx->header);
133a37bf UH	328	g_free(ctx);
e46b8fb1	329	return SR_ERR;
81bbdf6a DR	330	}
	331	snprintf(comment, 127, gnuplot_header_comment,
	332	ctx->num_enabled_probes, num_probes, frequency_s);
133a37bf	333	g_free(frequency_s);
81bbdf6a DR	334	}
	335
	336	/* Columns / channels */
	337	wbuf[0] = '\0';
	338	for (i = 0; i < ctx->num_enabled_probes; i++) {
	339	c = (char )&wbuf + strlen((char )&wbuf);
	340	sprintf(c, "# %d\t\t%s\n", i + 1, ctx->probelist[i]);
	341	}
	342
a00ba012	343	if (!(frequency_s = sr_period_string(samplerate))) {
133a37bf UH	344	g_free(ctx->header);
133a37bf UH	345	g_free(ctx);
e46b8fb1	346	return SR_ERR;
81bbdf6a DR	347	}
	348	t = time(NULL);
	349	b = snprintf(ctx->header, MAX_HEADER_LEN, gnuplot_header,
	350	PACKAGE_STRING, ctime(&t), comment, frequency_s,
	351	(char *)&wbuf);
133a37bf	352	g_free(frequency_s);
81bbdf6a DR	353
81bbdf6a DR	354	if (b < 0) {
133a37bf UH	355	g_free(ctx->header);
133a37bf UH	356	g_free(ctx);
e46b8fb1	357	return SR_ERR;
81bbdf6a DR	358	}
	359
	360	return 0;
	361	}
	362
054e6709 UH	363	static int analog_data(struct sr_output o, uint8_t data_in,
	364	uint64_t length_in, uint8_t **data_out,
	365	uint64_t *length_out)
81bbdf6a DR	366	{
81bbdf6a DR	367	struct context *ctx;
ff35879b	368	unsigned int max_linelen, outsize, p, /* curbit, */ i;
81bbdf6a DR	369	// uint64_t sample;
81bbdf6a DR	370	static uint64_t samplecount = 0;
054e6709	371	uint8_t outbuf, c;
809c5f20	372	struct sr_analog_sample *sample;
81bbdf6a DR	373
	374	ctx = o->internal;
	375	// max_linelen = 16 + ctx->num_enabled_probes * 2;
	376	max_linelen = 16 + ctx->num_enabled_probes * 30;
	377	outsize = length_in / ctx->unitsize * max_linelen;
	378	if (ctx->header)
	379	outsize += strlen(ctx->header);
	380
133a37bf UH	381	if (!(outbuf = g_try_malloc0(outsize))) {
133a37bf UH	382	sr_err("gnuplot out: %s: outbuf malloc failed", __func__);
e46b8fb1	383	return SR_ERR_MALLOC;
133a37bf	384	}
81bbdf6a DR	385
	386	outbuf[0] = '\0';
	387	if (ctx->header) {
	388	/* The header is still here, this must be the first packet. */
	389	strncpy(outbuf, ctx->header, outsize);
133a37bf	390	g_free(ctx->header);
81bbdf6a DR	391	ctx->header = NULL;
	392	}
	393
	394	for (i = 0; i <= length_in - ctx->unitsize; i += ctx->unitsize) {
	395	// memcpy(&sample, data_in + i, ctx->unitsize);
809c5f20	396	sample = (struct sr_analog_sample *) (data_in + i);
81bbdf6a DR	397
	398	/* The first column is a counter (needed for gnuplot). */
	399	c = outbuf + strlen(outbuf);
	400	sprintf(c, "%" PRIu64 "\t", samplecount++);
	401
	402	/* The next columns are the values of all channels. */
	403	for (p = 0; p < ctx->num_enabled_probes; p++) {
	404	// curbit = (sample & ((uint64_t) (1 << p))) >> p;
	405	c = outbuf + strlen(outbuf);
	406	// sprintf(c, "%d ", curbit);
	407	/*
	408	* FIXME: Should be doing proper raw->voltage conversion
	409	* here, casting to int16_t isn't it. Remember that if
	410	* res = 1 conversion isn't necessary.
	411	*/
	412	sprintf(c, "%f ", (double) ((int16_t) (sample->probes[p].val &
	413	((1 << sample->probes[p].res) - 1))));
	414	}
	415
	416	c = outbuf + strlen(outbuf);
	417	sprintf(c, "\n");
	418	}
	419
	420	*data_out = outbuf;
	421	*length_out = strlen(outbuf);
	422
e46b8fb1	423	return SR_OK;
81bbdf6a DR	424	}
81bbdf6a DR	425
f50f3f40	426	struct sr_output_format output_analog_gnuplot = {
cdb3573c	427	.id = "analog_gnuplot",
d494a4aa UH	428	.description = "Gnuplot analog",
	429	.df_type = SR_DF_ANALOG,
	430	.init = analog_init,
	431	.data = analog_data,
	432	.event = event,
81bbdf6a	433	};
77b45442	434	#endif