/*

  Copyright(c) 2014-2015 Intel Corporation

  All rights reserved.

  This library is free software; you can redistribute it and/or modify

  it under the terms of the GNU Lesser General Public License as

  published by the Free Software Foundation; either version 2.1 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 Lesser General Public License for more details.

  Authors: Mengdong Lin <mengdong.lin@intel.com>

           Yao Jin <yao.jin@intel.com>

           Liam Girdwood <liam.r.girdwood@linux.intel.com>

*/

#include "list.h"

#include "tplg_local.h"

/* mapping of widget text names to types */

static const struct map_elem widget_map[] = {

	{"input", SND_SOC_TPLG_DAPM_INPUT},

	{"output", SND_SOC_TPLG_DAPM_OUTPUT},

	{"mux", SND_SOC_TPLG_DAPM_MUX},

	{"mixer", SND_SOC_TPLG_DAPM_MIXER},

	{"pga", SND_SOC_TPLG_DAPM_PGA},

	{"out_drv", SND_SOC_TPLG_DAPM_OUT_DRV},

	{"adc", SND_SOC_TPLG_DAPM_ADC},

	{"dac", SND_SOC_TPLG_DAPM_DAC},

	{"switch", SND_SOC_TPLG_DAPM_SWITCH},

	{"pre", SND_SOC_TPLG_DAPM_PRE},

	{"post", SND_SOC_TPLG_DAPM_POST},

	{"aif_in", SND_SOC_TPLG_DAPM_AIF_IN},

	{"aif_out", SND_SOC_TPLG_DAPM_AIF_OUT},

	{"dai_in", SND_SOC_TPLG_DAPM_DAI_IN},

	{"dai_out", SND_SOC_TPLG_DAPM_DAI_OUT},

	{"dai_link", SND_SOC_TPLG_DAPM_DAI_LINK},

	{"buffer", SND_SOC_TPLG_DAPM_BUFFER},

	{"scheduler", SND_SOC_TPLG_DAPM_SCHEDULER},

	{"effect", SND_SOC_TPLG_DAPM_EFFECT},

	{"siggen", SND_SOC_TPLG_DAPM_SIGGEN},

	{"src", SND_SOC_TPLG_DAPM_SRC},

	{"asrc", SND_SOC_TPLG_DAPM_ASRC},

	{"encoder", SND_SOC_TPLG_DAPM_ENCODER},

	{"decoder", SND_SOC_TPLG_DAPM_DECODER},

};

static int lookup_widget(const char *w)

{

	unsigned int i;

	for (i = 0; i < ARRAY_SIZE(widget_map); i++) {

		if (strcmp(widget_map[i].name, w) == 0)

			return widget_map[i].id;

	}

	return -EINVAL;

}

static const char *get_widget_name(unsigned int type)

{

	unsigned int i;

	for (i = 0; i < ARRAY_SIZE(widget_map); i++) {

		if ((unsigned int)widget_map[i].id == type)

			return widget_map[i].name;

	}

	return NULL;

}

/* move referenced controls to the widget */

static int copy_dapm_control(struct tplg_elem *elem, struct tplg_elem *ref)

{

	struct snd_soc_tplg_dapm_widget *widget = elem->widget;

	tplg_dbg("Control '%s' used by '%s'", ref->id, elem->id);

	tplg_dbg("\tparent size: %d + %d -> %d, priv size -> %d",

		elem->size, ref->size, elem->size + ref->size,

		widget->priv.size);

	widget = realloc(widget, elem->size + ref->size);

	if (!widget)

		return -ENOMEM;

	elem->widget = widget;

	/* append the control to the end of the widget */

	memcpy((void*)widget + elem->size, ref->obj, ref->size);

	elem->size += ref->size;

	widget->num_kcontrols++;

	ref->compound_elem = 1;

	return 0;

}

/* check referenced controls for a widget */

static int tplg_build_widget(snd_tplg_t *tplg, struct tplg_elem *elem)

{

	struct tplg_ref *ref;

	struct list_head *base, *pos;

	int err = 0;

	base = &elem->ref_list;

	/* A widget's private data sits before the embedded controls.

	 * So merge the private data blocks at first

	 */

	list_for_each(pos, base) {

		ref = list_entry(pos, struct tplg_ref, list);

		if (ref->type != SND_TPLG_TYPE_DATA)

			continue;

		err = tplg_copy_data(tplg, elem, ref);

		if (err < 0)

			return err;

	}

	/* Merge the embedded controls */

	list_for_each(pos, base) {

		ref = list_entry(pos, struct tplg_ref, list);

		switch (ref->type) {

		case SND_TPLG_TYPE_MIXER:

			if (!ref->elem)

				ref->elem = tplg_elem_lookup(&tplg->mixer_list,

				ref->id, SND_TPLG_TYPE_MIXER, elem->index);

			if (ref->elem)

				err = copy_dapm_control(elem, ref->elem);

			break;

		case SND_TPLG_TYPE_ENUM:

			if (!ref->elem)

				ref->elem = tplg_elem_lookup(&tplg->enum_list,

				ref->id, SND_TPLG_TYPE_ENUM, elem->index);

			if (ref->elem)

				err = copy_dapm_control(elem, ref->elem);

			break;

		case SND_TPLG_TYPE_BYTES:

			if (!ref->elem)

				ref->elem = tplg_elem_lookup(&tplg->bytes_ext_list,

				ref->id, SND_TPLG_TYPE_BYTES, elem->index);

			if (ref->elem)

				err = copy_dapm_control(elem, ref->elem);

			break;

		default:

			break;

		}

		if (!ref->elem) {

			SNDERR("cannot find '%s' referenced by widget '%s'",

				ref->id, elem->id);

			return -EINVAL;

		}

		if (err < 0)

			return err;

	}

	return 0;

}

int tplg_build_widgets(snd_tplg_t *tplg)

{

	struct list_head *base, *pos;

	struct tplg_elem *elem;

	int err;

	base = &tplg->widget_list;

	list_for_each(pos, base) {

		elem = list_entry(pos, struct tplg_elem, list);

		if (!elem->widget || elem->type != SND_TPLG_TYPE_DAPM_WIDGET) {

			SNDERR("invalid widget '%s'", elem->id);

			return -EINVAL;

		}

		err = tplg_build_widget(tplg, elem);

		if (err < 0)

			return err;

		/* add widget to manifest */

		tplg->manifest.widget_elems++;

	}

	return 0;

}

int tplg_build_routes(snd_tplg_t *tplg)

{

	struct list_head *base, *pos;

	struct tplg_elem *elem;

	struct snd_soc_tplg_dapm_graph_elem *route;

	base = &tplg->route_list;

	list_for_each(pos, base) {

		elem = list_entry(pos, struct tplg_elem, list);

		if (!elem->route || elem->type != SND_TPLG_TYPE_DAPM_GRAPH) {

			SNDERR("invalid route '%s'", elem->id);

			return -EINVAL;

		}

		route = elem->route;

		tplg_dbg("Check route: sink '%s', control '%s', source '%s'",

			 route->sink, route->control, route->source);

		/* validate sink */

		if (strlen(route->sink) <= 0) {

			SNDERR("no sink");

			return -EINVAL;

		}

		if (!tplg_elem_lookup(&tplg->widget_list, route->sink,

			SND_TPLG_TYPE_DAPM_WIDGET, SND_TPLG_INDEX_ALL)) {

			SNDERR("undefined sink widget/stream '%s'", route->sink);

		}

		/* validate control name */

		if (strlen(route->control)) {

			if (!tplg_elem_lookup(&tplg->mixer_list, route->control,

					SND_TPLG_TYPE_MIXER, elem->index) &&

			!tplg_elem_lookup(&tplg->enum_list, route->control,

					SND_TPLG_TYPE_ENUM, elem->index)) {

				SNDERR("undefined mixer/enum control '%s'",

				       route->control);

			}

		}

		/* validate source */

		if (strlen(route->source) <= 0) {

			SNDERR("no source");

			return -EINVAL;

		}

		if (!tplg_elem_lookup(&tplg->widget_list, route->source,

			SND_TPLG_TYPE_DAPM_WIDGET, SND_TPLG_INDEX_ALL)) {

			SNDERR("undefined source widget/stream '%s'",

			       route->source);

		}

		/* add graph to manifest */

		tplg->manifest.graph_elems++;

	}

	return 0;

}

struct tplg_elem *tplg_elem_new_route(snd_tplg_t *tplg, int index)

{

	struct tplg_elem *elem;

	struct snd_soc_tplg_dapm_graph_elem *line;

	elem = tplg_elem_new();

	if (!elem)

		return NULL;

	elem->index = index;

	if (tplg->dapm_sort)

		tplg_elem_insert(elem, &tplg->route_list);

	else

		list_add_tail(&elem->list, &tplg->route_list);

	strcpy(elem->id, "line");

	elem->type = SND_TPLG_TYPE_DAPM_GRAPH;

	elem->size = sizeof(*line);

	line = calloc(1, sizeof(*line));

	if (!line) {

		tplg_elem_free(elem);

		return NULL;

	}

	elem->route = line;

	return elem;

}

#define LINE_SIZE	1024

/* line is defined as '"sink, control, source"' */

static int tplg_parse_line(const char *text,

			   struct snd_soc_tplg_dapm_graph_elem *line)

{

	char buf[LINE_SIZE];

	unsigned int len, i;

	const char *source = NULL, *sink = NULL, *control = NULL;

	snd_strlcpy(buf, text, LINE_SIZE);

	len = strlen(buf);

	if (len <= 2) {

		SNDERR("invalid route \"%s\"", buf);

		return -EINVAL;

	}

	/* find first , */

	for (i = 1; i < len; i++) {

		if (buf[i] == ',')

			goto second;

	}

	SNDERR("invalid route \"%s\"", buf);

	return -EINVAL;

second:

	/* find second , */

	sink = buf;

	control = &buf[i + 2];

	buf[i] = 0;

	for (; i < len; i++) {

		if (buf[i] == ',')

			goto done;

	}

	SNDERR("invalid route \"%s\"", buf);

	return -EINVAL;

done:

	buf[i] = 0;

	source = &buf[i + 2];

	strcpy(line->source, source);

	strcpy(line->control, control);

	strcpy(line->sink, sink);

	return 0;

}

static int tplg_parse_routes(snd_tplg_t *tplg, snd_config_t *cfg, int index)

{

	snd_config_iterator_t i, next;

	snd_config_t *n;

	struct tplg_elem *elem;

	struct snd_soc_tplg_dapm_graph_elem *line;

	int err;

	snd_config_for_each(i, next, cfg) {

		const char *val;

		n = snd_config_iterator_entry(i);

		if (snd_config_get_string(n, &val) < 0)

			continue;

		elem = tplg_elem_new_route(tplg, index);

		if (!elem)

			return -ENOMEM;

		line = elem->route;

		err = tplg_parse_line(val, line);

		if (err < 0)

			return err;

		tplg_dbg("route: sink '%s', control '%s', source '%s'",

				line->sink, line->control, line->source);

	}

	return 0;

}

int tplg_parse_dapm_graph(snd_tplg_t *tplg, snd_config_t *cfg,

			  void *private ATTRIBUTE_UNUSED)

{

	snd_config_iterator_t i, next;

	snd_config_t *n;

	int err;

	const char *graph_id;

	int index = -1;

	if (snd_config_get_type(cfg) != SND_CONFIG_TYPE_COMPOUND) {

		SNDERR("compound is expected for dapm graph definition");

		return -EINVAL;

	}

	snd_config_get_id(cfg, &graph_id);

	snd_config_for_each(i, next, cfg) {

		const char *id;

		n = snd_config_iterator_entry(i);

		if (snd_config_get_id(n, &id) < 0) {

			continue;

		}

		if (strcmp(id, "index") == 0) {

			if (tplg_get_integer(n, &index, 0))

				return -EINVAL;

			if (index < 0)

				return -EINVAL;

		}

		if (strcmp(id, "lines") == 0) {

			if (index < 0) {

				SNDERR("failed to parse dapm graph %s, missing index",

					graph_id);

				return -EINVAL;

			}

			err = tplg_parse_routes(tplg, n, index);

			if (err < 0) {

				SNDERR("failed to parse dapm graph %s",

					graph_id);

				return err;

			}

			continue;

		}

	}

	return 0;

}

/* save DAPM graph */

int tplg_save_dapm_graph(snd_tplg_t *tplg, int index, char **dst, const char *pfx)

{

	struct snd_soc_tplg_dapm_graph_elem *route;

	struct list_head *pos;

	struct tplg_elem *elem;

	int err, first, old_index;

	unsigned block, count;

	const char *fmt;

	old_index = -1;

	block = 0;

	count = 0;

	list_for_each(pos, &tplg->route_list) {

		elem = list_entry(pos, struct tplg_elem, list);

		if (!elem->route || elem->type != SND_TPLG_TYPE_DAPM_GRAPH)

			continue;

		if (index >= 0 && elem->index != index)

			continue;

		if (old_index != elem->index) {

			block++;

			old_index = elem->index;

		}

		count++;

	}

	if (count == 0)

		return 0;

	if (block < 10) {

		fmt = "\tset%u {\n";

	} else if (block < 100) {

		fmt = "\tset%02u {\n";

	} else if (block < 1000) {

		fmt = "\tset%03u {\n";

	} else {

		return -EINVAL;

	}

	old_index = -1;

	block = -1;

	first = 1;

	err = tplg_save_printf(dst, pfx, "SectionGraph {\n");

	list_for_each(pos, &tplg->route_list) {

		elem = list_entry(pos, struct tplg_elem, list);

		if (!elem->route || elem->type != SND_TPLG_TYPE_DAPM_GRAPH)

			continue;

		if (index >= 0 && elem->index != index)

			continue;

		if (old_index != elem->index) {

			if (old_index >= 0) {

				err = tplg_save_printf(dst, pfx, "\t\t]\n");

				if (err < 0)

					return err;

				err = tplg_save_printf(dst, pfx, "\t}\n");

				if (err < 0)

					return err;

			}

			old_index = elem->index;

			block++;

			first = 1;

			err = tplg_save_printf(dst, pfx, fmt, block);

			if (err >= 0)

				err = tplg_save_printf(dst, pfx, "\t\tindex %u\n",

						       elem->index);

			if (err < 0)

				return err;

		}

		if (first) {

			first = 0;

			err = tplg_save_printf(dst, pfx, "\t\tlines [\n", elem->index);

			if (err < 0)

				return err;

		}

		route = elem->route;

		err = tplg_save_printf(dst, pfx, "\t\t\t'%s, %s, %s'\n",

					route->sink, route->control,

					route->source);

		if (err < 0)

			return err;

	}

	if (!first) {

		if (err >= 0)

			err = tplg_save_printf(dst, pfx, "\t\t]\n");

		if (err >= 0)

			err = tplg_save_printf(dst, pfx, "\t}\n");

	}

	if (err >= 0)

		err = tplg_save_printf(dst, pfx, "}\n");

	return err;

}

/* DAPM Widget */

int tplg_parse_dapm_widget(snd_tplg_t *tplg,

			   snd_config_t *cfg, void *private ATTRIBUTE_UNUSED)

{

	struct snd_soc_tplg_dapm_widget *widget;

	struct tplg_elem *elem;

	snd_config_iterator_t i, next;

	snd_config_t *n;

	const char *id, *val = NULL;

	int widget_type, err, ival;

	elem = tplg_elem_new_common(tplg, cfg, NULL, SND_TPLG_TYPE_DAPM_WIDGET);

	if (!elem)

		return -ENOMEM;

	tplg_dbg(" Widget: %s", elem->id);

	widget = elem->widget;

	snd_strlcpy(widget->name, elem->id, SNDRV_CTL_ELEM_ID_NAME_MAXLEN);

	widget->size = elem->size;

	snd_config_for_each(i, next, cfg) {

		n = snd_config_iterator_entry(i);

		if (snd_config_get_id(n, &id) < 0)

			continue;

		/* skip comments */

		if (strcmp(id, "comment") == 0)

			continue;

		if (id[0] == '#')

			continue;

		if (strcmp(id, "type") == 0) {

			if (snd_config_get_string(n, &val) < 0)

				return -EINVAL;

			widget_type = lookup_widget(val);

			if (widget_type < 0){

				SNDERR("widget '%s': Unsupported widget type %s",

					elem->id, val);

				return -EINVAL;

			}

			widget->id = widget_type;

			tplg_dbg("\t%s: %s", id, val);

			continue;

		}

		if (strcmp(id, "stream_name") == 0) {

			if (snd_config_get_string(n, &val) < 0)

				return -EINVAL;

			snd_strlcpy(widget->sname, val,

				       SNDRV_CTL_ELEM_ID_NAME_MAXLEN);

			tplg_dbg("\t%s: %s", id, val);

			continue;

		}

		if (strcmp(id, "no_pm") == 0) {

			ival = snd_config_get_bool(n);

			if (ival < 0)

				return -EINVAL;

			widget->reg = ival ? -1 : 0;

			tplg_dbg("\t%s: %s", id, val);

			continue;

		}

		if (strcmp(id, "shift") == 0) {

			if (tplg_get_integer(n, &ival, 0))

				return -EINVAL;

			widget->shift = ival;

			tplg_dbg("\t%s: %d", id, widget->shift);

			continue;

		}

		if (strcmp(id, "reg") == 0) {

			if (tplg_get_integer(n, &ival, 0))

				return -EINVAL;

			widget->reg = ival;

			tplg_dbg("\t%s: %d", id, widget->reg);

			continue;

		}

		if (strcmp(id, "invert") == 0) {

			ival = snd_config_get_bool(n);

			if (ival < 0)

				return -EINVAL;

			widget->invert = ival;

			tplg_dbg("\t%s: %d", id, widget->invert);

			continue;

		}

		if (strcmp(id, "subseq") == 0) {

			if (tplg_get_integer(n, &ival, 0))

				return -EINVAL;

			widget->subseq = ival;

			tplg_dbg("\t%s: %d", id, widget->subseq);

			continue;

		}

		if (strcmp(id, "event_type") == 0) {

			if (tplg_get_integer(n, &ival, 0))

				return -EINVAL;

			widget->event_type = ival;

			tplg_dbg("\t%s: %d", id, widget->event_type);

			continue;

		}

		if (strcmp(id, "event_flags") == 0) {

			if (tplg_get_integer(n, &ival, 0))

				return -EINVAL;

			widget->event_flags = ival;

			tplg_dbg("\t%s: %d", id, widget->event_flags);

			continue;

		}

		if (strcmp(id, "enum") == 0) {

			err = tplg_parse_refs(n, elem, SND_TPLG_TYPE_ENUM);

			if (err < 0)

				return err;

			continue;

		}

		if (strcmp(id, "mixer") == 0) {

			err = tplg_parse_refs(n, elem, SND_TPLG_TYPE_MIXER);

			if (err < 0)

				return err;

			continue;

		}

		if (strcmp(id, "bytes") == 0) {

			err = tplg_parse_refs(n, elem, SND_TPLG_TYPE_BYTES);

			if (err < 0)

				return err;

			continue;

		}

		if (strcmp(id, "data") == 0) {

			err = tplg_parse_refs(n, elem, SND_TPLG_TYPE_DATA);

			if (err < 0)

				return err;

			continue;

		}

	}

	return 0;

}

/* save DAPM widget */

int tplg_save_dapm_widget(snd_tplg_t *tplg ATTRIBUTE_UNUSED,

			  struct tplg_elem *elem,

			  char **dst, const char *pfx)

{

	struct snd_soc_tplg_dapm_widget *widget = elem->widget;

	const char *s;

	char pfx2[16];

	int err;

	err = tplg_save_printf(dst, NULL, "'%s' {\n", elem->id);

	if (err >= 0 && elem->index)

		err = tplg_save_printf(dst, pfx, "\tindex %u\n",

				       elem->index);

	if (err >= 0) {

		s = get_widget_name(widget->id);

		if (s)

			err = tplg_save_printf(dst, pfx, "\ttype %s\n", s);

		else

			err = tplg_save_printf(dst, pfx, "\ttype %u\n",

					       widget->id);

	}

	if (err >= 0 && widget->sname[0])

		err = tplg_save_printf(dst, pfx, "\tstream_name '%s'\n",

				       widget->sname);

	if (err >= 0 && widget->reg)

		err = tplg_save_printf(dst, pfx, "\tno_pm 1\n");

	if (err >= 0 && widget->shift)

		err = tplg_save_printf(dst, pfx, "\tshift %u\n",

				       widget->shift);

	if (err >= 0 && widget->invert)

		err = tplg_save_printf(dst, pfx, "\tinvert %u\n",

				       widget->invert);

	if (err >= 0 && widget->subseq)

		err = tplg_save_printf(dst, pfx, "\tsubseq %u\n",

				       widget->subseq);

	if (err >= 0 && widget->event_type)

		err = tplg_save_printf(dst, pfx, "\tevent_type %u\n",

				       widget->event_type);

	if (err >= 0 && widget->event_flags)

		err = tplg_save_printf(dst, pfx, "\tevent_flags %u\n",

				       widget->event_flags);

	snprintf(pfx2, sizeof(pfx2), "%s\t", pfx ?: "");

	if (err >= 0)

		err = tplg_save_refs(tplg, elem, SND_TPLG_TYPE_ENUM,

				     "enum", dst, pfx2);

	if (err >= 0)

		err = tplg_save_refs(tplg, elem, SND_TPLG_TYPE_MIXER,

				     "mixer", dst, pfx2);

	if (err >= 0)

		err = tplg_save_refs(tplg, elem, SND_TPLG_TYPE_BYTES,

				     "bytes", dst, pfx2);

	if (err >= 0)

		err = tplg_save_refs(tplg, elem, SND_TPLG_TYPE_DATA,

				     "data", dst, pfx2);

	if (err >= 0)

		err = tplg_save_printf(dst, pfx, "}\n");

	return err;

}

int tplg_add_route(snd_tplg_t *tplg, struct snd_tplg_graph_elem *t, int index)

{

	struct tplg_elem *elem;

	struct snd_soc_tplg_dapm_graph_elem *line;

	if (!t->src || !t->sink)

		return -EINVAL;

	elem = tplg_elem_new_route(tplg, index);

	if (!elem)

		return -ENOMEM;

	line = elem->route;

	snd_strlcpy(line->source, t->src, SNDRV_CTL_ELEM_ID_NAME_MAXLEN);

	if (t->ctl)

		snd_strlcpy(line->control, t->ctl,

				SNDRV_CTL_ELEM_ID_NAME_MAXLEN);

	snd_strlcpy(line->sink, t->sink, SNDRV_CTL_ELEM_ID_NAME_MAXLEN);

	return 0;

}

int tplg_add_graph_object(snd_tplg_t *tplg, snd_tplg_obj_template_t *t)

{

	struct snd_tplg_graph_template *gt =  t->graph;

	int i, ret;

	for (i = 0; i < gt->count; i++) {

		ret = tplg_add_route(tplg, gt->elem + i, t->index);

		if (ret < 0)

			return ret;

	}

	return 0;

}

int tplg_add_widget_object(snd_tplg_t *tplg, snd_tplg_obj_template_t *t)

{

	struct snd_tplg_widget_template *wt = t->widget;

	struct snd_soc_tplg_dapm_widget *w;

	struct tplg_elem *elem;

	int i, ret = 0;

	tplg_dbg("Widget: %s", wt->name);

	elem = tplg_elem_new_common(tplg, NULL, wt->name,

		SND_TPLG_TYPE_DAPM_WIDGET);

	if (!elem)

		return -ENOMEM;

	/* init new widget */

	w = elem->widget;

	w->size = elem->size;

	w->id = wt->id;

	snd_strlcpy(w->name, wt->name, SNDRV_CTL_ELEM_ID_NAME_MAXLEN);

	if (wt->sname)

		snd_strlcpy(w->sname, wt->sname, SNDRV_CTL_ELEM_ID_NAME_MAXLEN);

	w->reg = wt->reg;

	w->shift = wt->shift;

	w->mask = wt->mask;

	w->subseq = wt->subseq;

	w->invert = wt->invert;

	w->ignore_suspend = wt->ignore_suspend;

	w->event_flags = wt->event_flags;

	w->event_type = wt->event_type;

	/* add private data */

	if (wt->priv != NULL && wt->priv->size > 0) {

		ret = tplg_add_data(tplg, elem, wt->priv,

				    sizeof(*wt->priv) + wt->priv->size);

		if (ret < 0) {

			tplg_elem_free(elem);

			return ret;

		}

	}

	/* add controls to the widget's reference list */

	for (i = 0 ; i < wt->num_ctls; i++) {

		struct snd_tplg_ctl_template *ct = wt->ctl[i];

		struct tplg_elem *elem_ctl;

		struct snd_tplg_mixer_template *mt;

		struct snd_tplg_bytes_template *bt;

		struct snd_tplg_enum_template *et;

		if (!ct) {

			tplg_elem_free(elem);

			return -EINVAL;

		}

		switch (ct->type) {

		case SND_SOC_TPLG_TYPE_MIXER:

			mt = container_of(ct, struct snd_tplg_mixer_template, hdr);

			ret = tplg_add_mixer(tplg, mt, &elem_ctl);

			break;

		case SND_SOC_TPLG_TYPE_BYTES:

			bt = container_of(ct, struct snd_tplg_bytes_template, hdr);

			ret = tplg_add_bytes(tplg, bt, &elem_ctl);

			break;

		case SND_SOC_TPLG_TYPE_ENUM:

			et = container_of(ct, struct snd_tplg_enum_template, hdr);

			ret = tplg_add_enum(tplg, et, &elem_ctl);

			break;

		default:

			SNDERR("widget %s: invalid type %d for ctl %d",

				wt->name, ct->type, i);

			break;

		}

		if (ret < 0) {

			tplg_elem_free(elem);

			return ret;

		}

		ret = tplg_ref_add_elem(elem, elem_ctl);

		if (ret < 0) {

			tplg_elem_free(elem);

			return ret;

		}

	}

	return 0;

}

/* decode dapm widget from the binary input */

int tplg_decode_dapm_widget(snd_tplg_t *tplg,

			    size_t pos,

			    struct snd_soc_tplg_hdr *hdr,

			    void *bin, size_t size)

{

	struct list_head heap;

	struct snd_soc_tplg_dapm_widget *w;

	snd_tplg_obj_template_t t;

	struct snd_tplg_widget_template *wt;

	struct snd_tplg_mixer_template *mt;

	struct snd_tplg_enum_template *et;

	struct snd_tplg_bytes_template *bt;

	struct snd_soc_tplg_ctl_hdr *chdr;

	struct snd_soc_tplg_mixer_control *mc;

	struct snd_soc_tplg_enum_control *ec;

	struct snd_soc_tplg_bytes_control *bc;

	size_t size2;

	unsigned int index;

	int err;

	err = tplg_decode_template(tplg, pos, hdr, &t);

	if (err < 0)

		return err;