gstreamer/ges/ges-structure-parser.c

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/* GStreamer Editing Services
*
* Copyright (C) <2015> Mathieu Duponchelle <mathieu.duponchelle@opencreed.com>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library 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
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#include "ges-structure-parser.h"
#include <ges/ges.h>
G_DEFINE_TYPE (GESStructureParser, ges_structure_parser, G_TYPE_OBJECT);
static void
ges_structure_parser_init (GESStructureParser * self)
{
}
static void
_finalize (GObject * self)
{
GList *tmp;
for (tmp = ((GESStructureParser *) self)->structures; tmp; tmp = tmp->next) {
gst_structure_free (tmp->data);
}
for (tmp = ((GESStructureParser *) self)->wrong_strings; tmp; tmp = tmp->next) {
g_free (tmp->data);
}
}
static void
ges_structure_parser_class_init (GESStructureParserClass * klass)
{
G_OBJECT_CLASS (klass)->finalize = _finalize;
}
void
ges_structure_parser_parse_string (GESStructureParser * self,
const gchar * text, gboolean is_symbol)
{
gchar *new_string = NULL;
if (self->current_string) {
new_string = g_strconcat (self->current_string, text, NULL);
} else if (is_symbol) {
new_string = g_strdup (text);
}
g_free (self->current_string);
self->current_string = new_string;
}
void
ges_structure_parser_parse_default (GESStructureParser * self,
const gchar * text)
{
gchar *new_string = NULL;
if (self->add_comma && self->current_string) {
new_string = g_strconcat (self->current_string, ",", text, NULL);
g_free (self->current_string);
self->current_string = new_string;
self->add_comma = FALSE;
} else {
ges_structure_parser_parse_string (self, text, FALSE);
}
}
void
ges_structure_parser_parse_whitespace (GESStructureParser * self)
{
self->add_comma = TRUE;
}
static void
_finish_structure (GESStructureParser * self)
{
if (self->current_string) {
GstStructure *structure =
gst_structure_new_from_string (self->current_string);
if (structure == NULL) {
GST_ERROR ("Could not parse %s", self->current_string);
self->wrong_strings = g_list_append (self->wrong_strings,
g_strdup (self->current_string));
return;
}
self->structures = g_list_append (self->structures, structure);
g_free (self->current_string);
self->current_string = NULL;
}
}
void
ges_structure_parser_end_of_file (GESStructureParser * self)
{
_finish_structure (self);
}
void
ges_structure_parser_parse_symbol (GESStructureParser * self,
const gchar * symbol)
{
_finish_structure (self);
while (*symbol == ' ' || *symbol == '+')
symbol++;
self->add_comma = FALSE;
if (!g_ascii_strncasecmp (symbol, "clip", 4))
ges_structure_parser_parse_string (self, "clip, uri=", TRUE);
else if (!g_ascii_strncasecmp (symbol, "test-clip", 9))
ges_structure_parser_parse_string (self, "test-clip, pattern=", TRUE);
else if (!g_ascii_strncasecmp (symbol, "effect", 6))
ges_structure_parser_parse_string (self, "effect, bin-description=", TRUE);
else if (!g_ascii_strncasecmp (symbol, "transition", 10))
ges_structure_parser_parse_string (self, "transition, type=", TRUE);
}
void
ges_structure_parser_parse_setter (GESStructureParser * self,
const gchar * setter)
{
gchar *parsed_setter;
_finish_structure (self);
while (*setter == '-' || *setter == ' ')
setter++;
while (*setter != '-')
setter++;
setter++;
parsed_setter = g_strdup_printf ("set-property, property=%s, value=", setter);
self->add_comma = FALSE;
ges_structure_parser_parse_string (self, parsed_setter, TRUE);
g_free (parsed_setter);
}
GESStructureParser *
ges_structure_parser_new (void)
{
return (g_object_new (GES_TYPE_STRUCTURE_PARSER, NULL));
}
GError *
ges_structure_parser_get_error (GESStructureParser * self)
{
GList *tmp;
GError *error = NULL;
GString *msg = NULL;
if (self->wrong_strings == NULL)
return NULL;
msg = g_string_new ("Could not parse: ");
for (tmp = self->wrong_strings; tmp; tmp = tmp->next) {
g_string_append_printf (msg, " %s", (gchar *) tmp->data);
}
error = g_error_new_literal (GES_ERROR, 0, msg->str);
g_string_free (msg, TRUE);
GST_ERROR ("BoOOOM ");
return error;
}