topology: Add topology core parser.

The topology core parses the high level topology file and calls the
individual object parsers when any new object element is detected at
the high level.

Signed-off-by: Liam Girdwood <liam.r.girdwood@linux.intel.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>

src/topology/elem.c

@@ -0,0 +1,187 @@
+/*
+  Copyright(c) 2014-2015 Intel Corporation
+  All rights reserved.
+
+  This program is free software; you can redistribute it and/or modify
+  it under the terms of version 2 of the GNU General Public License as
+  published by the Free Software Foundation.
+
+  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.
+
+  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"
+
+int tplg_ref_add(struct tplg_elem *elem, int type, const char* id)
+{
+	struct tplg_ref *ref;
+
+	ref = calloc(1, sizeof(*ref));
+	if (!ref)
+		return -ENOMEM;
+
+	strncpy(ref->id, id, SNDRV_CTL_ELEM_ID_NAME_MAXLEN);
+	ref->id[SNDRV_CTL_ELEM_ID_NAME_MAXLEN - 1] = 0;
+	ref->type = type;
+
+	list_add_tail(&ref->list, &elem->ref_list);
+	return 0;
+}
+
+void tplg_ref_free_list(struct list_head *base)
+{
+	struct list_head *pos, *npos;
+	struct tplg_ref *ref;
+
+	list_for_each_safe(pos, npos, base) {
+		ref = list_entry(pos, struct tplg_ref, list);
+		list_del(&ref->list);
+		free(ref);
+	}
+}
+
+struct tplg_elem *tplg_elem_new(void)
+{
+	struct tplg_elem *elem;
+
+	elem = calloc(1, sizeof(*elem));
+	if (!elem)
+		return NULL;
+
+	INIT_LIST_HEAD(&elem->ref_list);
+	return elem;
+}
+
+void tplg_elem_free(struct tplg_elem *elem)
+{
+	tplg_ref_free_list(&elem->ref_list);
+
+	/* free struct snd_tplg_ object,
+	 * the union pointers share the same address
+	 */
+	if (elem->mixer_ctrl)
+		free(elem->mixer_ctrl);
+
+	free(elem);
+}
+
+void tplg_elem_free_list(struct list_head *base)
+{
+	struct list_head *pos, *npos;
+	struct tplg_elem *elem;
+
+	list_for_each_safe(pos, npos, base) {
+		elem = list_entry(pos, struct tplg_elem, list);
+		list_del(&elem->list);
+		tplg_elem_free(elem);
+	}
+}
+
+struct tplg_elem *tplg_elem_lookup(struct list_head *base, const char* id,
+	unsigned int type)
+{
+	struct list_head *pos;
+	struct tplg_elem *elem;
+
+	list_for_each(pos, base) {
+
+		elem = list_entry(pos, struct tplg_elem, list);
+
+		if (!strcmp(elem->id, id) && elem->type == type)
+			return elem;
+	}
+
+	return NULL;
+}
+
+/* create a new common element and object */
+struct tplg_elem* tplg_elem_new_common(snd_tplg_t *tplg,
+	snd_config_t *cfg, enum object_type type)
+{
+	struct tplg_elem *elem;
+	const char *id;
+	int obj_size = 0;
+	void *obj;
+
+	elem = tplg_elem_new();
+	if (!elem)
+		return NULL;
+
+	snd_config_get_id(cfg, &id);
+	strncpy(elem->id, id, SNDRV_CTL_ELEM_ID_NAME_MAXLEN);
+	elem->id[SNDRV_CTL_ELEM_ID_NAME_MAXLEN - 1] = 0;
+
+	switch (type) {
+	case OBJECT_TYPE_DATA:
+		list_add_tail(&elem->list, &tplg->pdata_list);
+		break;
+	case OBJECT_TYPE_TEXT:
+		list_add_tail(&elem->list, &tplg->text_list);
+		break;
+	case OBJECT_TYPE_TLV:
+		list_add_tail(&elem->list, &tplg->tlv_list);
+		elem->size = sizeof(struct snd_soc_tplg_ctl_tlv);
+		break;
+	case OBJECT_TYPE_BYTES:
+		list_add_tail(&elem->list, &tplg->bytes_ext_list);
+		obj_size = sizeof(struct snd_soc_tplg_bytes_control);
+		break;
+	case OBJECT_TYPE_ENUM:
+		list_add_tail(&elem->list, &tplg->enum_list);
+		obj_size = sizeof(struct snd_soc_tplg_enum_control);
+		break;
+	case SND_SOC_TPLG_TYPE_MIXER:
+		list_add_tail(&elem->list, &tplg->mixer_list);
+		obj_size = sizeof(struct snd_soc_tplg_mixer_control);
+		break;
+	case OBJECT_TYPE_DAPM_WIDGET:
+		list_add_tail(&elem->list, &tplg->widget_list);
+		obj_size = sizeof(struct snd_soc_tplg_dapm_widget);
+		break;
+	case OBJECT_TYPE_STREAM_CONFIG:
+		list_add_tail(&elem->list, &tplg->pcm_config_list);
+		obj_size = sizeof(struct snd_soc_tplg_stream_config);
+		break;
+	case OBJECT_TYPE_STREAM_CAPS:
+		list_add_tail(&elem->list, &tplg->pcm_caps_list);
+		obj_size = sizeof(struct snd_soc_tplg_stream_caps);
+		break;
+	case OBJECT_TYPE_PCM:
+		list_add_tail(&elem->list, &tplg->pcm_list);
+		obj_size = sizeof(struct snd_soc_tplg_pcm_dai);
+		break;
+	case OBJECT_TYPE_BE:
+		list_add_tail(&elem->list, &tplg->be_list);
+		obj_size = sizeof(struct snd_soc_tplg_pcm_dai);
+		break;
+	case OBJECT_TYPE_CC:
+		list_add_tail(&elem->list, &tplg->cc_list);
+		obj_size = sizeof(struct snd_soc_tplg_pcm_dai);
+		break;
+	default:
+		free(elem);
+		return NULL;
+	}
+
+	/* create new object too if required */
+	if (obj_size > 0) {
+		obj = calloc(1, obj_size);
+		if (obj == NULL) {
+			free(elem);
+			return NULL;
+		}
+
+		elem->obj = obj;
+		elem->size = obj_size;
+	}
+
+	elem->type = type;
+	return elem;
+}