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/* GStreamer
* Copyright (C) 2008 Stefan Kost <ensonic@users.sf.net>
*
* gsttaginject.c:
*
* 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., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
/**
* SECTION:element-taginject
*
* Element that injects new metadata tags, but passes incomming data through
* unmodified.
*
* <refsect2>
* <title>Example launch lines</title>
* |[
* gst-launch-1.0 audiotestsrc num-buffers=100 ! taginject tags="title=testsrc,artist=gstreamer" ! vorbisenc ! oggmux ! filesink location=test.ogg
* ]| set title and artist
* |[
* gst-launch-1.0 audiotestsrc num-buffers=100 ! taginject tags="keywords=\{\"testone\",\"audio\"\},title=\"audio\ testtone\"" ! vorbisenc ! oggmux ! filesink location=test.ogg
* ]| set keywords and title demonstrating quoting of special chars and handling lists
* </refsect2>
*/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include <stdlib.h>
#include "gsttaginject.h"
static GstStaticPadTemplate sinktemplate = GST_STATIC_PAD_TEMPLATE ("sink",
GST_PAD_SINK,
GST_PAD_ALWAYS,
GST_STATIC_CAPS_ANY);
static GstStaticPadTemplate srctemplate = GST_STATIC_PAD_TEMPLATE ("src",
GST_PAD_SRC,
GST_PAD_ALWAYS,
GST_STATIC_CAPS_ANY);
GST_DEBUG_CATEGORY_STATIC (gst_tag_inject_debug);
#define GST_CAT_DEFAULT gst_tag_inject_debug
enum
{
PROP_TAGS = 1
};
#define gst_tag_inject_parent_class parent_class
G_DEFINE_TYPE (GstTagInject, gst_tag_inject, GST_TYPE_BASE_TRANSFORM);
static void gst_tag_inject_finalize (GObject * object);
static void gst_tag_inject_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec);
static void gst_tag_inject_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec);
static GstFlowReturn gst_tag_inject_transform_ip (GstBaseTransform * trans,
GstBuffer * buf);
static gboolean gst_tag_inject_start (GstBaseTransform * trans);
static void
gst_tag_inject_finalize (GObject * object)
{
GstTagInject *self = GST_TAG_INJECT (object);
if (self->tags) {
gst_tag_list_unref (self->tags);
self->tags = NULL;
}
G_OBJECT_CLASS (parent_class)->finalize (object);
}
static void
gst_tag_inject_class_init (GstTagInjectClass * klass)
{
GObjectClass *gobject_class;
GstElementClass *gstelement_class;
GstBaseTransformClass *gstbasetrans_class;
gobject_class = G_OBJECT_CLASS (klass);
gstelement_class = GST_ELEMENT_CLASS (klass);
gstbasetrans_class = GST_BASE_TRANSFORM_CLASS (klass);
GST_DEBUG_CATEGORY_INIT (gst_tag_inject_debug, "taginject", 0,
"tag inject element");
gobject_class->set_property = gst_tag_inject_set_property;
gobject_class->get_property = gst_tag_inject_get_property;
g_object_class_install_property (gobject_class, PROP_TAGS,
g_param_spec_string ("tags", "taglist",
"List of tags to inject into the target file",
NULL, G_PARAM_WRITABLE | G_PARAM_STATIC_STRINGS));
gobject_class->finalize = gst_tag_inject_finalize;
gst_element_class_set_static_metadata (gstelement_class,
"TagInject",
"Generic", "inject metadata tags", "Stefan Kost <ensonic@users.sf.net>");
gst_element_class_add_static_pad_template (gstelement_class, &srctemplate);
gst_element_class_add_static_pad_template (gstelement_class, &sinktemplate);
gstbasetrans_class->transform_ip =
GST_DEBUG_FUNCPTR (gst_tag_inject_transform_ip);
gstbasetrans_class->start = GST_DEBUG_FUNCPTR (gst_tag_inject_start);
}
static void
gst_tag_inject_init (GstTagInject * self)
{
GstBaseTransform *trans = GST_BASE_TRANSFORM (self);
gst_base_transform_set_gap_aware (trans, TRUE);
self->tags = NULL;
}
static GstFlowReturn
gst_tag_inject_transform_ip (GstBaseTransform * trans, GstBuffer * buf)
{
GstTagInject *self = GST_TAG_INJECT (trans);
if (G_UNLIKELY (!self->tags_sent)) {
self->tags_sent = TRUE;
/* send tags */
if (self->tags && !gst_tag_list_is_empty (self->tags)) {
GST_DEBUG ("tag event :%" GST_PTR_FORMAT, self->tags);
gst_pad_push_event (GST_BASE_TRANSFORM_SRC_PAD (trans),
gst_event_new_tag (gst_tag_list_ref (self->tags)));
}
}
return GST_FLOW_OK;
}
static void
gst_tag_inject_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec)
{
GstTagInject *self = GST_TAG_INJECT (object);
switch (prop_id) {
case PROP_TAGS:{
gchar *structure =
g_strdup_printf ("taglist,%s", g_value_get_string (value));
if (!(self->tags = gst_tag_list_new_from_string (structure))) {
GST_WARNING ("unparsable taglist = '%s'", structure);
}
/* make sure that tags will be send */
self->tags_sent = FALSE;
g_free (structure);
break;
}
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gst_tag_inject_get_property (GObject * object, guint prop_id, GValue * value,
GParamSpec * pspec)
{
/*GstTagInject *self = GST_TAG_INJECT (object); */
switch (prop_id) {
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static gboolean
gst_tag_inject_start (GstBaseTransform * trans)
{
GstTagInject *self = GST_TAG_INJECT (trans);
/* we need to sent tags _transform_ip() once */
self->tags_sent = FALSE;
return TRUE;
}
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