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Diffstat (limited to 'gst/debugutils/gsttaginject.c')
-rw-r--r-- | gst/debugutils/gsttaginject.c | 204 |
1 files changed, 204 insertions, 0 deletions
diff --git a/gst/debugutils/gsttaginject.c b/gst/debugutils/gsttaginject.c new file mode 100644 index 00000000..3429fb14 --- /dev/null +++ b/gst/debugutils/gsttaginject.c @@ -0,0 +1,204 @@ +/* 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., 59 Temple Place - Suite 330, + * Boston, MA 02111-1307, USA. + */ +/** + * SECTION:element-taginject + * + * Element that injects new metadata tags, but passes incomming data through + * unmodified. + * + * <refsect2> + * <title>Example launch lines</title> + * |[ + * gst-launch audiotestsrc num-buffers=100 ! taginject tags="title=testsrc,artist=gstreamer" ! vorbisenc ! oggmux ! filesink location=test.ogg + * ]| set title and artist + * |[ + * gst-launch 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 + * </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 DEBUG_INIT(bla) \ + GST_DEBUG_CATEGORY_INIT (gst_tag_inject_debug, "taginject", 0, "tag inject element"); + +GST_BOILERPLATE_FULL (GstTagInject, gst_tag_inject, GstBaseTransform, + GST_TYPE_BASE_TRANSFORM, DEBUG_INIT); + +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_base_init (gpointer g_class) +{ + GstElementClass *gstelement_class = GST_ELEMENT_CLASS (g_class); + + gst_element_class_set_details_simple (gstelement_class, + "TagInject", + "Generic", "inject metadata tags", "Stefan Kost <ensonic@users.sf.net>"); + gst_element_class_add_pad_template (gstelement_class, + gst_static_pad_template_get (&srctemplate)); + gst_element_class_add_pad_template (gstelement_class, + gst_static_pad_template_get (&sinktemplate)); +} + +static void +gst_tag_inject_finalize (GObject * object) +{ + GstTagInject *self = GST_TAG_INJECT (object); + + if (self->tags) { + gst_tag_list_free (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); + + gobject_class->set_property = GST_DEBUG_FUNCPTR (gst_tag_inject_set_property); + gobject_class->get_property = GST_DEBUG_FUNCPTR (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_DEBUG_FUNCPTR (gst_tag_inject_finalize); + + 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, GstTagInjectClass * g_class) +{ + 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_element_found_tags (GST_ELEMENT (trans), + gst_tag_list_copy (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_structure_from_string (structure, NULL))) { + GST_WARNING ("unparsable taglist = '%s'", structure); + } + 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; +} |