2005-04-23 23:29:47 +00:00
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/* GStreamer
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* Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
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* 2000 Wim Taymans <wtay@chello.be>
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* 2005 Wim Taymans <wim@fluendo.com>
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* 2005 David Schleef <ds@schleef.org>
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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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#include <stdlib.h>
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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-i18n-lib.h"
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#include <gst/gstmarshal.h>
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#include <gst/gst.h>
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#define GST_TYPE_CAPSFILTER \
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(gst_capsfilter_get_type())
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#define GST_CAPSFILTER(obj) \
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(G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_CAPSFILTER,GstCapsFilter))
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#define GST_CAPSFILTER_CLASS(klass) \
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(G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_CAPSFILTER,GstCapsFilterClass))
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#define GST_IS_CAPSFILTER(obj) \
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(G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_CAPSFILTER))
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#define GST_IS_CAPSFILTER_CLASS(obj) \
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(G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_CAPSFILTER))
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typedef struct _GstCapsFilter GstCapsFilter;
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typedef struct _GstCapsFilterClass GstCapsFilterClass;
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struct _GstCapsFilter
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{
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GstElement element;
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GstPad *srcpad;
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GstPad *sinkpad;
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GstCaps *filter_caps;
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};
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struct _GstCapsFilterClass
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{
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GstElementClass element_class;
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};
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GType gst_capsfilter_get_type (void);
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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_capsfilter_debug);
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#define GST_CAT_DEFAULT gst_capsfilter_debug
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GstElementDetails gst_capsfilter_details = GST_ELEMENT_DETAILS ("CapsFilter",
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"Generic",
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"Pass data without modification, limiting formats",
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"David Schleef <ds@schleef.org>");
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enum
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{
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PROP_0,
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PROP_FILTER_CAPS
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};
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#define _do_init(bla) \
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GST_DEBUG_CATEGORY_INIT (gst_capsfilter_debug, "capsfilter", 0, "capsfilter element");
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GST_BOILERPLATE_FULL (GstCapsFilter, gst_capsfilter, GstElement,
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GST_TYPE_ELEMENT, _do_init);
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static void gst_capsfilter_finalize (GObject * object);
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static void gst_capsfilter_set_property (GObject * object, guint prop_id,
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const GValue * value, GParamSpec * pspec);
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static void gst_capsfilter_get_property (GObject * object, guint prop_id,
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GValue * value, GParamSpec * pspec);
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static GstCaps *gst_capsfilter_getcaps (GstPad * pad);
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static GstFlowReturn gst_capsfilter_chain (GstPad * pad, GstBuffer * buf);
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static void
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gst_capsfilter_base_init (gpointer g_class)
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{
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GstElementClass *gstelement_class = GST_ELEMENT_CLASS (g_class);
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gst_element_class_add_pad_template (gstelement_class,
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gst_static_pad_template_get (&srctemplate));
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gst_element_class_add_pad_template (gstelement_class,
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gst_static_pad_template_get (&sinktemplate));
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gst_element_class_set_details (gstelement_class, &gst_capsfilter_details);
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}
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static void
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gst_capsfilter_finalize (GObject * object)
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{
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GstCapsFilter *capsfilter;
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capsfilter = GST_CAPSFILTER (object);
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gst_caps_unref (capsfilter->filter_caps);
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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_capsfilter_class_init (GstCapsFilterClass * klass)
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{
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GObjectClass *gobject_class;
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GstElementClass *gstelement_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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gobject_class->set_property = GST_DEBUG_FUNCPTR (gst_capsfilter_set_property);
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gobject_class->get_property = GST_DEBUG_FUNCPTR (gst_capsfilter_get_property);
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gobject_class->finalize = GST_DEBUG_FUNCPTR (gst_capsfilter_finalize);
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g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_FILTER_CAPS,
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g_param_spec_boxed ("filter_caps", _("Filter caps"),
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_("Caps to use to filter the possible allowed formats"),
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GST_TYPE_CAPS, G_PARAM_READWRITE));
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}
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static void
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gst_capsfilter_init (GstCapsFilter * capsfilter)
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{
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gst_element_create_all_pads (GST_ELEMENT (capsfilter));
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capsfilter->srcpad = gst_element_get_pad (GST_ELEMENT (capsfilter), "src");
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capsfilter->sinkpad = gst_element_get_pad (GST_ELEMENT (capsfilter), "sink");
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gst_pad_set_getcaps_function (capsfilter->srcpad, gst_capsfilter_getcaps);
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gst_pad_set_getcaps_function (capsfilter->sinkpad, gst_capsfilter_getcaps);
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gst_pad_set_chain_function (capsfilter->sinkpad, gst_capsfilter_chain);
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capsfilter->filter_caps = gst_caps_new_any ();
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}
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static GstCaps *
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gst_capsfilter_getcaps (GstPad * pad)
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{
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GstPad *otherpad;
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GstCapsFilter *capsfilter = GST_CAPSFILTER (GST_OBJECT_PARENT (pad));
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GstCaps *caps;
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GstCaps *icaps;
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otherpad = (pad == capsfilter->srcpad) ? capsfilter->sinkpad :
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capsfilter->srcpad;
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caps = gst_pad_peer_get_caps (otherpad);
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2005-05-06 17:10:49 +00:00
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if (caps == NULL)
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caps = gst_caps_new_any ();
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2005-04-23 23:29:47 +00:00
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icaps = gst_caps_intersect (caps, capsfilter->filter_caps);
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gst_caps_unref (caps);
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return icaps;
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}
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static GstFlowReturn
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gst_capsfilter_chain (GstPad * pad, GstBuffer * buf)
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{
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GstCapsFilter *capsfilter = GST_CAPSFILTER (GST_PAD_PARENT (pad));
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gst_pad_push (capsfilter->srcpad, buf);
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return GST_FLOW_OK;
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}
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static void
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gst_capsfilter_set_property (GObject * object, guint prop_id,
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const GValue * value, GParamSpec * pspec)
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{
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GstCapsFilter *capsfilter;
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capsfilter = GST_CAPSFILTER (object);
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switch (prop_id) {
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case PROP_FILTER_CAPS:
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capsfilter->filter_caps = gst_caps_copy (gst_value_get_caps (value));
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break;
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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_capsfilter_get_property (GObject * object, guint prop_id, GValue * value,
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GParamSpec * pspec)
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{
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GstCapsFilter *capsfilter;
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capsfilter = GST_CAPSFILTER (object);
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switch (prop_id) {
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case PROP_FILTER_CAPS:
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gst_value_set_caps (value, capsfilter->filter_caps);
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break;
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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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