| /* 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; |
| } |