[libsigrok.git] / output / gnuplot.c

/*
 * 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;
	unsigned int unitsize;
	char *header;
	uint8_t *old_sample;
};

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;
	int num_channels;
	char *c, *frequency_s;
	char wbuf[1000], comment[128];
	time_t t;

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

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

	if (!(ctx = g_try_malloc0(sizeof(struct context)))) {
		sr_err("%s: ctx malloc failed", __func__);
		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_PROBE_LOGIC)
			continue;
		if (!ch->enabled)
			continue;
		ctx->num_enabled_channels++;
	}
	if (ctx->num_enabled_channels <= 0) {
		sr_err("%s: no logic channel enabled", __func__);
		return SR_ERR;
	}

	ctx->unitsize = (ctx->num_enabled_channels + 7) / 8;

	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, l = o->sdi->channels; l; l = l->next, i++) {
		ch = l->data;
		if (ch->type != SR_PROBE_LOGIC)
			continue;
		if (!ch->enabled)
			continue;
		c = (char *)&wbuf + strlen((const char *)&wbuf);
		sprintf(c, "# %d\t\t%s\n", i + 1, ch->name);
	}

	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_strdup_printf(gnuplot_header, PACKAGE_STRING,
			ctime(&t), comment, frequency_s, (char *)&wbuf);
	g_free(frequency_s);

	if (!(ctx->old_sample = g_try_malloc0(ctx->unitsize))) {
		sr_err("%s: ctx->old_sample malloc failed", __func__);
		g_free(ctx->header);
		g_free(ctx);
		return SR_ERR_MALLOC;
	}

	return 0;
}

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

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

	if (!length_out) {
		sr_err("%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("%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;
	const uint8_t *sample;
	static uint64_t samplecount = 0;
	uint8_t *outbuf, *c;

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

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

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

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

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

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

	if (!(outbuf = g_try_malloc0(outsize))) {
		sr_err("%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) {

		sample = data_in + i;

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

		/* 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_channels; p++) {
			curbit = (sample[p / 8] & ((uint8_t) (1 << (p % 8)))) >> (p % 8);
			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,
};
Commit	Line	Data
	1	/*
	2	* This file is part of the libsigrok 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>
	24	#include "config.h" /* Needed for PACKAGE_STRING and others. */
	25	#include "libsigrok.h"
	26	#include "libsigrok-internal.h"
	27
	28	#define LOG_PREFIX "output/gnuplot"
	29
	30	struct context {
	31	unsigned int num_enabled_channels;
	32	unsigned int unitsize;
	33	char *header;
	34	uint8_t *old_sample;
	35	};
	36
	37	static const char *gnuplot_header = "\
	38	# Sample data in space-separated columns format usable by gnuplot\n\
	39	#\n\
	40	# Generated by: %s on %s%s\
	41	# Period: %s\n\
	42	#\n\
	43	# Column\tChannel\n\
	44	# -------------------------------------\
	45	----------------------------------------\n\
	46	# 0\t\tSample counter (for internal gnuplot purposes)\n%s\n";
	47
	48	static const char *gnuplot_header_comment = "\
	49	# Comment: Acquisition with %d/%d channels at %s\n";
	50
	51	static int init(struct sr_output *o)
	52	{
	53	struct context *ctx;
	54	struct sr_channel *ch;
	55	GSList *l;
	56	GVariant *gvar;
	57	uint64_t samplerate;
	58	unsigned int i;
	59	int num_channels;
	60	char c, frequency_s;
	61	char wbuf[1000], comment[128];
	62	time_t t;
	63
	64	if (!o) {
	65	sr_err("%s: o was NULL", __func__);
	66	return SR_ERR_ARG;
	67	}
	68
	69	if (!o->sdi) {
	70	sr_err("%s: o->sdi was NULL", __func__);
	71	return SR_ERR_ARG;
	72	}
	73
	74	if (!(ctx = g_try_malloc0(sizeof(struct context)))) {
	75	sr_err("%s: ctx malloc failed", __func__);
	76	return SR_ERR_MALLOC;
	77	}
	78
	79	o->internal = ctx;
	80	ctx->num_enabled_channels = 0;
	81	for (l = o->sdi->channels; l; l = l->next) {
	82	ch = l->data;
	83	if (ch->type != SR_PROBE_LOGIC)
	84	continue;
	85	if (!ch->enabled)
	86	continue;
	87	ctx->num_enabled_channels++;
	88	}
	89	if (ctx->num_enabled_channels <= 0) {
	90	sr_err("%s: no logic channel enabled", __func__);
	91	return SR_ERR;
	92	}
	93
	94	ctx->unitsize = (ctx->num_enabled_channels + 7) / 8;
	95
	96	num_channels = g_slist_length(o->sdi->channels);
	97	comment[0] = '\0';
	98	samplerate = 0;
	99	if (sr_config_get(o->sdi->driver, o->sdi, NULL, SR_CONF_SAMPLERATE,
	100	&gvar) == SR_OK) {
	101	samplerate = g_variant_get_uint64(gvar);
	102	g_variant_unref(gvar);
	103	if (!(frequency_s = sr_samplerate_string(samplerate))) {
	104	sr_err("%s: sr_samplerate_string failed", __func__);
	105	g_free(ctx);
	106	return SR_ERR;
	107	}
	108	snprintf(comment, 127, gnuplot_header_comment,
	109	ctx->num_enabled_channels, num_channels, frequency_s);
	110	g_free(frequency_s);
	111	}
	112
	113	/* Columns / channels */
	114	wbuf[0] = '\0';
	115	for (i = 0, l = o->sdi->channels; l; l = l->next, i++) {
	116	ch = l->data;
	117	if (ch->type != SR_PROBE_LOGIC)
	118	continue;
	119	if (!ch->enabled)
	120	continue;
	121	c = (char )&wbuf + strlen((const char )&wbuf);
	122	sprintf(c, "# %d\t\t%s\n", i + 1, ch->name);
	123	}
	124
	125	if (!(frequency_s = sr_period_string(samplerate))) {
	126	sr_err("%s: sr_period_string failed", __func__);
	127	g_free(ctx);
	128	return SR_ERR;
	129	}
	130
	131	t = time(NULL);
	132	ctx->header = g_strdup_printf(gnuplot_header, PACKAGE_STRING,
	133	ctime(&t), comment, frequency_s, (char *)&wbuf);
	134	g_free(frequency_s);
	135
	136	if (!(ctx->old_sample = g_try_malloc0(ctx->unitsize))) {
	137	sr_err("%s: ctx->old_sample malloc failed", __func__);
	138	g_free(ctx->header);
	139	g_free(ctx);
	140	return SR_ERR_MALLOC;
	141	}
	142
	143	return 0;
	144	}
	145
	146	static int event(struct sr_output o, int event_type, uint8_t *data_out,
	147	uint64_t *length_out)
	148	{
	149	if (!o) {
	150	sr_err("%s: o was NULL", __func__);
	151	return SR_ERR_ARG;
	152	}
	153
	154	if (!data_out) {
	155	sr_err("%s: data_out was NULL", __func__);
	156	return SR_ERR_ARG;
	157	}
	158
	159	if (!length_out) {
	160	sr_err("%s: length_out was NULL", __func__);
	161	return SR_ERR_ARG;
	162	}
	163
	164	switch (event_type) {
	165	case SR_DF_TRIGGER:
	166	/* TODO: Can a trigger mark be in a gnuplot data file? */
	167	break;
	168	case SR_DF_END:
	169	g_free(o->internal);
	170	o->internal = NULL;
	171	break;
	172	default:
	173	sr_err("%s: unsupported event type: %d", __func__, event_type);
	174	break;
	175	}
	176
	177	*data_out = NULL;
	178	*length_out = 0;
	179
	180	return SR_OK;
	181	}
	182
	183	static int data(struct sr_output o, const uint8_t data_in,
	184	uint64_t length_in, uint8_t *data_out, uint64_t length_out)
	185	{
	186	struct context *ctx;
	187	unsigned int max_linelen, outsize, p, curbit, i;
	188	const uint8_t *sample;
	189	static uint64_t samplecount = 0;
	190	uint8_t outbuf, c;
	191
	192	if (!o) {
	193	sr_err("%s: o was NULL", __func__);
	194	return SR_ERR_ARG;
	195	}
	196
	197	if (!o->internal) {
	198	sr_err("%s: o->internal was NULL", __func__);
	199	return SR_ERR_ARG;
	200	}
	201
	202	if (!data_in) {
	203	sr_err("%s: data_in was NULL", __func__);
	204	return SR_ERR_ARG;
	205	}
	206
	207	if (!data_out) {
	208	sr_err("%s: data_out was NULL", __func__);
	209	return SR_ERR_ARG;
	210	}
	211
	212	if (!length_out) {
	213	sr_err("%s: length_out was NULL", __func__);
	214	return SR_ERR_ARG;
	215	}
	216
	217	ctx = o->internal;
	218	max_linelen = 16 + ctx->num_enabled_channels * 2;
	219	outsize = length_in / ctx->unitsize * max_linelen;
	220	if (ctx->header)
	221	outsize += strlen(ctx->header);
	222
	223	if (!(outbuf = g_try_malloc0(outsize))) {
	224	sr_err("%s: outbuf malloc failed", __func__);
	225	return SR_ERR_MALLOC;
	226	}
	227
	228	outbuf[0] = '\0';
	229	if (ctx->header) {
	230	/* The header is still here, this must be the first packet. */
	231	strncpy((char *)outbuf, ctx->header, outsize);
	232	g_free(ctx->header);
	233	ctx->header = NULL;
	234	}
	235
	236	for (i = 0; i <= length_in - ctx->unitsize; i += ctx->unitsize) {
	237
	238	sample = data_in + i;
	239
	240	/*
	241	* Don't output the same samples multiple times. However, make
	242	* sure to output at least the first and last sample.
	243	*/
	244	if (samplecount++ != 0 &&
	245	!memcmp(sample, ctx->old_sample, ctx->unitsize)) {
	246	if (i != (length_in - ctx->unitsize))
	247	continue;
	248	}
	249	memcpy(ctx->old_sample, sample, ctx->unitsize);
	250
	251	/* The first column is a counter (needed for gnuplot). */
	252	c = outbuf + strlen((const char *)outbuf);
	253	sprintf((char *)c, "%" PRIu64 "\t", samplecount++);
	254
	255	/* The next columns are the values of all channels. */
	256	for (p = 0; p < ctx->num_enabled_channels; p++) {
	257	curbit = (sample[p / 8] & ((uint8_t) (1 << (p % 8)))) >> (p % 8);
	258	c = outbuf + strlen((const char *)outbuf);
	259	sprintf((char *)c, "%d ", curbit);
	260	}
	261
	262	c = outbuf + strlen((const char *)outbuf);
	263	sprintf((char *)c, "\n");
	264	}
	265
	266	*data_out = outbuf;
	267	length_out = strlen((const char )outbuf);
	268
	269	return SR_OK;
	270	}
	271
	272	SR_PRIV struct sr_output_format output_gnuplot = {
	273	.id = "gnuplot",
	274	.description = "Gnuplot",
	275	.df_type = SR_DF_LOGIC,
	276	.init = init,
	277	.data = data,
	278	.event = event,
	279	};