--- /dev/null
+/* GStreamer XmpConfig
+ * Copyright (C) 2010 Thiago Santos <thiago.sousa.santos@collabora.co.uk>
+ *
+ * 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.
+ */
+
+/**
+ * SECTION:gstxmpconfig
+ * @short_description: Interface for elements that provide XMP serialization
+ *
+ * <refsect2>
+ * <para>
+ * This interface is implemented by elements that are able to do XMP serialization. Examples for
+ * such elements are #jifmux and #qtmux.
+ * </para>
+ * <para>
+ * Applications can use this interface to configure which XMP schemas should be used when serializing
+ * tags into XMP. Schemas are represented by their names, a full list of the supported schemas can be
+ * obtained from gst_tag_xmp_list_schemas(). By default, all schemas are used.
+ * </para>
+ * </refsect2>
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include "xmpwriter.h"
+#include <string.h>
+#include <gst/tag/tag.h>
+
+static GQuark tag_xmp_writer_key;
+
+typedef struct
+{
+ GSList *schemas;
+ GStaticMutex lock;
+} GstTagXmpWriterData;
+
+GType
+gst_tag_xmp_writer_get_type (void)
+{
+ static volatile gsize xmp_config_type = 0;
+
+ if (g_once_init_enter (&xmp_config_type)) {
+ GType _type;
+ static const GTypeInfo xmp_config_info = {
+ sizeof (GstTagXmpWriterInterface), /* class_size */
+ NULL, /* base_init */
+ NULL, /* base_finalize */
+ NULL,
+ NULL, /* class_finalize */
+ NULL, /* class_data */
+ 0,
+ 0,
+ NULL
+ };
+
+ _type = g_type_register_static (G_TYPE_INTERFACE, "GstTagXmpWriter",
+ &xmp_config_info, 0);
+ tag_xmp_writer_key = g_quark_from_static_string ("GST_TAG_XMP_WRITER");
+ g_type_interface_add_prerequisite (_type, GST_TYPE_ELEMENT);
+
+ g_once_init_leave (&xmp_config_type, _type);
+ }
+
+ return xmp_config_type;
+}
+
+static void
+gst_tag_xmp_writer_data_add_schema_unlocked (GstTagXmpWriterData * data,
+ const gchar * schema)
+{
+ if (!g_slist_find_custom (data->schemas, schema, (GCompareFunc) strcmp)) {
+ data->schemas = g_slist_prepend (data->schemas, g_strdup (schema));
+ }
+}
+
+static void
+gst_tag_xmp_writer_data_add_all_schemas_unlocked (GstTagXmpWriterData * data)
+{
+ const gchar **schemas;
+ gint i = 0;
+
+ /* initialize it with all schemas */
+ schemas = gst_tag_xmp_list_schemas ();
+ while (schemas[i] != NULL) {
+ gst_tag_xmp_writer_data_add_schema_unlocked (data, schemas[i]);
+ i++;
+ }
+}
+
+
+static void
+gst_tag_xmp_writer_data_free (gpointer p)
+{
+ GstTagXmpWriterData *data = (GstTagXmpWriterData *) p;
+ GSList *iter;
+
+ if (data->schemas) {
+ for (iter = data->schemas; iter; iter = g_slist_next (iter)) {
+ g_free (iter->data);
+ }
+ g_slist_free (data->schemas);
+ }
+
+ g_static_mutex_free (&data->lock);
+
+ g_slice_free (GstTagXmpWriterData, data);
+}
+
+static GstTagXmpWriterData *
+gst_tag_xmp_writer_get_data (GstTagXmpWriter * xmpconfig)
+{
+ GstTagXmpWriterData *data;
+
+ data = g_object_get_qdata (G_OBJECT (xmpconfig), tag_xmp_writer_key);
+ if (!data) {
+ static GStaticMutex create_mutex = G_STATIC_MUTEX_INIT;
+
+ /* make sure no other thread is creating a GstTagXmpWriterData at the same time */
+ g_static_mutex_lock (&create_mutex);
+ data = g_object_get_qdata (G_OBJECT (xmpconfig), tag_xmp_writer_key);
+ if (!data) {
+ data = g_slice_new (GstTagXmpWriterData);
+ g_static_mutex_init (&data->lock);
+
+ data->schemas = NULL;
+ gst_tag_xmp_writer_data_add_all_schemas_unlocked (data);
+
+ g_object_set_qdata_full (G_OBJECT (xmpconfig), tag_xmp_writer_key, data,
+ gst_tag_xmp_writer_data_free);
+ }
+ g_static_mutex_unlock (&create_mutex);
+ }
+
+ return data;
+}
+
+/**
+ * gst_tag_xmp_writer_add_all_schemas:
+ * @config: a #GstTagXmpWriter
+ *
+ * Adds all available XMP schemas to the configuration. Meaning that
+ * all will be used.
+ *
+ * Since: 0.10.33
+ */
+void
+gst_tag_xmp_writer_add_all_schemas (GstTagXmpWriter * config)
+{
+ GstTagXmpWriterData *data;
+
+ g_return_if_fail (GST_IS_TAG_XMP_WRITER (config));
+
+ data = gst_tag_xmp_writer_get_data (config);
+
+ g_static_mutex_lock (&data->lock);
+ gst_tag_xmp_writer_data_add_all_schemas_unlocked (data);
+ g_static_mutex_unlock (&data->lock);
+}
+
+/**
+ * gst_tag_xmp_writer_add_schema:
+ * @config: a #GstTagXmpWriter
+ * @schema: the schema to be added
+ *
+ * Adds @schema to the list schemas
+ *
+ * Since: 0.10.33
+ */
+void
+gst_tag_xmp_writer_add_schema (GstTagXmpWriter * config, const gchar * schema)
+{
+ GstTagXmpWriterData *data;
+
+ g_return_if_fail (GST_IS_TAG_XMP_WRITER (config));
+
+ data = gst_tag_xmp_writer_get_data (config);
+
+ g_static_mutex_lock (&data->lock);
+ gst_tag_xmp_writer_data_add_schema_unlocked (data, schema);
+ g_static_mutex_unlock (&data->lock);
+}
+
+/**
+ * gst_tag_xmp_writer_has_schema:
+ * @config: a #GstTagXmpWriter
+ * @schema: the schema to test
+ *
+ * Checks if @schema is going to be used
+ *
+ * Returns: %TRUE if it is going to be used
+ * Since: 0.10.33
+ */
+gboolean
+gst_tag_xmp_writer_has_schema (GstTagXmpWriter * config, const gchar * schema)
+{
+ GstTagXmpWriterData *data;
+ gboolean ret = FALSE;
+ GSList *iter;
+
+ g_return_val_if_fail (GST_IS_TAG_XMP_WRITER (config), FALSE);
+
+ data = gst_tag_xmp_writer_get_data (config);
+
+ g_static_mutex_lock (&data->lock);
+ for (iter = data->schemas; iter; iter = g_slist_next (iter)) {
+ if (strcmp ((const gchar *) iter->data, schema) == 0) {
+ ret = TRUE;
+ break;
+ }
+ }
+ g_static_mutex_unlock (&data->lock);
+
+ return ret;
+}
+
+/**
+ * gst_tag_xmp_writer_remove_schema:
+ * @config: a #GstTagXmpWriter
+ * @schema: the schema to remove
+ *
+ * Removes a schema from the list of schemas to use. Nothing is done if
+ * the schema wasn't in the list
+ *
+ * Since: 0.10.33
+ */
+void
+gst_tag_xmp_writer_remove_schema (GstTagXmpWriter * config,
+ const gchar * schema)
+{
+ GstTagXmpWriterData *data;
+ GSList *iter = NULL;
+
+ g_return_if_fail (GST_IS_TAG_XMP_WRITER (config));
+
+ data = gst_tag_xmp_writer_get_data (config);
+
+ g_static_mutex_lock (&data->lock);
+ for (iter = data->schemas; iter; iter = g_slist_next (iter)) {
+ if (strcmp ((const gchar *) iter->data, schema) == 0) {
+ g_free (iter->data);
+ data->schemas = g_slist_delete_link (data->schemas, iter);
+ break;
+ }
+ }
+ g_static_mutex_unlock (&data->lock);
+}
+
+/**
+ * gst_tag_xmp_writer_remove_all_schemas:
+ * @config: a #GstTagXmpWriter
+ *
+ * Removes all schemas from the list of schemas to use. Meaning that no
+ * XMP will be generated.
+ *
+ * Since: 0.10.33
+ */
+void
+gst_tag_xmp_writer_remove_all_schemas (GstTagXmpWriter * config)
+{
+ GstTagXmpWriterData *data;
+ GSList *iter;
+
+ g_return_if_fail (GST_IS_TAG_XMP_WRITER (config));
+
+ data = gst_tag_xmp_writer_get_data (config);
+
+ g_static_mutex_lock (&data->lock);
+ if (data->schemas) {
+ for (iter = data->schemas; iter; iter = g_slist_next (iter)) {
+ g_free (iter->data);
+ }
+ g_slist_free (data->schemas);
+ }
+ data->schemas = NULL;
+ g_static_mutex_unlock (&data->lock);
+}
+
+GstBuffer *
+gst_tag_xmp_writer_tag_list_to_xmp_buffer (GstTagXmpWriter * config,
+ const GstTagList * taglist, gboolean read_only)
+{
+ GstTagXmpWriterData *data;
+ GstBuffer *buf = NULL;
+ gint i = 0;
+ GSList *iter;
+
+ g_return_val_if_fail (GST_IS_TAG_XMP_WRITER (config), NULL);
+
+ data = gst_tag_xmp_writer_get_data (config);
+
+ g_static_mutex_lock (&data->lock);
+ if (data->schemas) {
+ gchar **array = g_new0 (gchar *, g_slist_length (data->schemas) + 1);
+ if (array) {
+ for (iter = data->schemas; iter; iter = g_slist_next (iter)) {
+ array[i++] = (gchar *) iter->data;
+ }
+ buf = gst_tag_list_to_xmp_buffer_full (taglist, read_only,
+ (const gchar **) array);
+ g_free (array);
+ }
+ }
+ g_static_mutex_unlock (&data->lock);
+
+ return buf;
+}
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