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Original commit message from CVS: * docs/gst/gstreamer-docs.sgml: * docs/gst/tmpl/.cvsignore: * docs/gst/tmpl/gsttrace.sgml: * docs/gst/tmpl/gsttrashstack.sgml: * gst/Makefile.am: * gst/gst.h: * gst/gstelement.h: * gst/gstevent.h: * gst/gstmessage.c: * gst/gstmessage.h: * gst/gsttag.c: * gst/gsttag.h: * gst/gsttaginterface.c: * gst/gsttaginterface.h: * gst/gsttaglist.c: * gst/gsttaglist.h: * gst/gsttagsetter.c: * gst/gsttagsetter.h: * gst/gsttrace.c: * gst/gsttrace.h: * gst/gsttrashstack.c: renamed gsttag -> gsttaglist, gsttaginterface -> gsttagsetter inlined docs for gsttrace, gsttrashstack
283 lines
7.2 KiB
C
283 lines
7.2 KiB
C
/* GStreamer
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* Copyright (C) 2003 Benjamin Otte <in7y118@public.uni-hamburg.de>
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*
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* gsttagsetter.c: interface for tag setting on elements
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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/**
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* SECTION:gsttagsetter
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* @short_description: Element interface that allows setting and retrieval of media metadata
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*
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*/
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#ifdef HAVE_CONFIG_H
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# include "config.h"
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#endif
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#include "gst_private.h"
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#include "gsttagsetter.h"
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#include <gobject/gvaluecollector.h>
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#include <string.h>
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GST_DEBUG_CATEGORY_STATIC (gst_tag_interface_debug);
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#define GST_CAT_DEFAULT tag_tag_interface_debug
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static GQuark gst_tag_key;
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typedef struct
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{
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GstTagMergeMode mode;
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GstTagList *list;
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}
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GstTagData;
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GType
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gst_tag_setter_get_type (void)
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{
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static GType tag_setter_type = 0;
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if (!tag_setter_type) {
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static const GTypeInfo tag_setter_info = {
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sizeof (GstTagSetterIFace), /* class_size */
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NULL, /* base_init */
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NULL, /* base_finalize */
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NULL,
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NULL, /* class_finalize */
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NULL, /* class_data */
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0,
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0,
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NULL
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};
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GST_DEBUG_CATEGORY_INIT (gst_tag_interface_debug, "GstTagInterface", 0,
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"interfaces for tagging");
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tag_setter_type = g_type_register_static (G_TYPE_INTERFACE, "GstTagSetter",
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&tag_setter_info, 0);
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g_type_interface_add_prerequisite (tag_setter_type, GST_TYPE_ELEMENT);
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gst_tag_key = g_quark_from_static_string ("GST_TAG_SETTER");
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}
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return tag_setter_type;
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}
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static void
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gst_tag_data_free (gpointer p)
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{
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GstTagData *data = (GstTagData *) p;
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if (data->list)
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gst_tag_list_free (data->list);
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g_free (data);
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}
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static GstTagData *
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gst_tag_setter_get_data (GstTagSetter * setter)
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{
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GstTagData *data;
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data = g_object_get_qdata (G_OBJECT (setter), gst_tag_key);
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if (!data) {
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data = g_new (GstTagData, 1);
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data->list = NULL;
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data->mode = GST_TAG_MERGE_KEEP;
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g_object_set_qdata_full (G_OBJECT (setter), gst_tag_key, data,
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gst_tag_data_free);
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}
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return data;
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}
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/**
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* gst_tag_setter_merge:
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* @setter: a #GstTagSetter
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* @list: a tag list to merge from
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* @mode: the mode to merge with
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*
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* Merges the given list into the setter's list using the given mode.
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*/
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void
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gst_tag_setter_merge (GstTagSetter * setter, const GstTagList * list,
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GstTagMergeMode mode)
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{
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GstTagData *data;
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g_return_if_fail (GST_IS_TAG_SETTER (setter));
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g_return_if_fail (GST_TAG_MODE_IS_VALID (mode));
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data = gst_tag_setter_get_data (setter);
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if (!data->list) {
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data->list = gst_tag_list_copy (list);
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} else {
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gst_tag_list_merge (data->list, list, mode);
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}
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}
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/**
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* gst_tag_setter_add:
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* @setter: a #GstTagSetter
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* @mode: the mode to use
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* @tag: tag to set
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* @...: more tag / value pairs to set
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*
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* Adds the given tag / value pairs on the setter using the given merge mode.
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* The list must be terminated with NULL.
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*/
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void
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gst_tag_setter_add (GstTagSetter * setter, GstTagMergeMode mode,
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const gchar * tag, ...)
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{
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va_list args;
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g_return_if_fail (GST_IS_TAG_SETTER (setter));
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g_return_if_fail (GST_TAG_MODE_IS_VALID (mode));
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va_start (args, tag);
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gst_tag_setter_add_valist (setter, mode, tag, args);
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va_end (args);
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}
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/**
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* gst_tag_setter_add_values:
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* @setter: a #GstTagSetter
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* @mode: the mode to use
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* @tag: tag to set
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* @...: more tag / GValue pairs to set
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*
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* Adds the given tag / GValue pairs on the setter using the given merge mode.
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* The list must be terminated with NULL.
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*/
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void
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gst_tag_setter_add_values (GstTagSetter * setter, GstTagMergeMode mode,
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const gchar * tag, ...)
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{
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va_list args;
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g_return_if_fail (GST_IS_TAG_SETTER (setter));
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g_return_if_fail (GST_TAG_MODE_IS_VALID (mode));
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va_start (args, tag);
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gst_tag_setter_add_valist_values (setter, mode, tag, args);
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va_end (args);
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}
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/**
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* gst_tag_setter_add_valist:
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* @setter: a #GstTagSetter
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* @mode: the mode to use
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* @tag: tag to set
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* @var_args: tag / value pairs to set
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*
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* Adds the given tag / value pairs on the setter using the given merge mode.
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* The list must be terminated with NULL.
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*/
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void
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gst_tag_setter_add_valist (GstTagSetter * setter, GstTagMergeMode mode,
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const gchar * tag, va_list var_args)
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{
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GstTagData *data;
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g_return_if_fail (GST_IS_TAG_SETTER (setter));
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g_return_if_fail (GST_TAG_MODE_IS_VALID (mode));
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data = gst_tag_setter_get_data (setter);
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if (!data->list)
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data->list = gst_tag_list_new ();
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gst_tag_list_add_valist (data->list, mode, tag, var_args);
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}
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/**
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* gst_tag_setter_add_valist_values:
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* @setter: a #GstTagSetter
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* @mode: the mode to use
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* @tag: tag to set
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* @var_args: tag / GValue pairs to set
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*
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* Adds the given tag / GValue pairs on the setter using the given merge mode.
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* The list must be terminated with NULL.
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*/
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void
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gst_tag_setter_add_valist_values (GstTagSetter * setter, GstTagMergeMode mode,
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const gchar * tag, va_list var_args)
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{
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GstTagData *data;
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g_return_if_fail (GST_IS_TAG_SETTER (setter));
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g_return_if_fail (GST_TAG_MODE_IS_VALID (mode));
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data = gst_tag_setter_get_data (setter);
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if (!data->list)
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data->list = gst_tag_list_new ();
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gst_tag_list_add_valist_values (data->list, mode, tag, var_args);
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}
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/**
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* gst_tag_setter_get_list:
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* @setter: a #GstTagSetter
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*
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* Returns the current list of tags the setter uses. The list should not be
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* modified or freed.
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*
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* Returns: a current snapshot of the taglist used in the setter
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* or NULL if none is used.
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*/
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G_CONST_RETURN GstTagList *
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gst_tag_setter_get_list (GstTagSetter * setter)
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{
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g_return_val_if_fail (GST_IS_TAG_SETTER (setter), NULL);
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return gst_tag_setter_get_data (setter)->list;
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}
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/**
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* gst_tag_setter_set_merge_mode:
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* @setter: a #GstTagSetter
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* @mode: The mode with which tags are added
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*
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* Sets the given merge mode that is used for adding tags from events to tags
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* specified by this interface. The default is #GST_TAG_MERGE_KEEP, which keeps
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* the tags by this interface and discards tags from events.
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*/
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void
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gst_tag_setter_set_merge_mode (GstTagSetter * setter, GstTagMergeMode mode)
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{
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g_return_if_fail (GST_IS_TAG_SETTER (setter));
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g_return_if_fail (GST_TAG_MODE_IS_VALID (mode));
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gst_tag_setter_get_data (setter)->mode = mode;
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}
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/**
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* gst_tag_setter_get_merge_mode:
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* @setter: a #GstTagSetter
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*
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* Queries the mode by which tags inside the setter are overwritten by tags
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* from events
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*
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* Returns: the merge mode used inside the element.
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*/
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GstTagMergeMode
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gst_tag_setter_get_merge_mode (GstTagSetter * setter)
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{
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g_return_val_if_fail (GST_IS_TAG_SETTER (setter), FALSE);
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return gst_tag_setter_get_data (setter)->mode;
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}
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