topology: Add text section parser.

Parse text lists (like enum values) and store for later attachment
to other objects.

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

diff --git a/src/topology/text.c b/src/topology/text.c
new file mode 100644 (file)
index 0000000..ebb6e38
--- /dev/null
+++ b/src/topology/text.c
@@ -0,0 +1,88 @@
+/*
+  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"
+
+#define TEXT_SIZE_MAX \
+       (SND_SOC_TPLG_NUM_TEXTS * SNDRV_CTL_ELEM_ID_NAME_MAXLEN)
+
+static int parse_text_values(snd_config_t *cfg, struct tplg_elem *elem)
+{
+       snd_config_iterator_t i, next;
+       snd_config_t *n;
+       const char *value = NULL;
+       int j = 0;
+
+       tplg_dbg(" Text Values: %s\n", elem->id);
+
+       snd_config_for_each(i, next, cfg) {
+               n = snd_config_iterator_entry(i);
+
+               if (j == SND_SOC_TPLG_NUM_TEXTS) {
+                       tplg_dbg("error: text string number exceeds %d\n", j);
+                       return -ENOMEM;
+               }
+
+               /* get value */
+               if (snd_config_get_string(n, &value) < 0)
+                       continue;
+
+               elem_copy_text(&elem->texts[j][0], value,
+                       SNDRV_CTL_ELEM_ID_NAME_MAXLEN);
+               tplg_dbg("\t%s\n", &elem->texts[j][0]);
+
+               j++;
+       }
+
+       return 0;
+}
+
+/* Parse Text data */
+int tplg_parse_text(snd_tplg_t *tplg, snd_config_t *cfg,
+       void *private ATTRIBUTE_UNUSED)
+{
+       snd_config_iterator_t i, next;
+       snd_config_t *n;
+       const char *id;
+       int err = 0;
+       struct tplg_elem *elem;
+
+       elem = tplg_elem_new_common(tplg, cfg, OBJECT_TYPE_TEXT);
+       if (!elem)
+               return -ENOMEM;
+
+       snd_config_for_each(i, next, cfg) {
+
+               n = snd_config_iterator_entry(i);
+               if (snd_config_get_id(n, &id) < 0)
+                       continue;
+
+               if (strcmp(id, "values") == 0) {
+                       err = parse_text_values(n, elem);
+                       if (err < 0) {
+                               SNDERR("error: failed to parse text values");
+                               return err;
+                       }
+                       continue;
+               }
+       }
+
+       return err;
+}