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