/* GStreamer * Copyright (C) 1999,2000 Erik Walthinsen * 2000 Wim Taymans * 2005 Wim Taymans * 2005 David Schleef * * 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. */ #include #ifdef HAVE_CONFIG_H # include "config.h" #endif #include "../gst-i18n-lib.h" #include #include #define GST_TYPE_CAPSFILTER \ (gst_capsfilter_get_type()) #define GST_CAPSFILTER(obj) \ (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_CAPSFILTER,GstCapsFilter)) #define GST_CAPSFILTER_CLASS(klass) \ (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_CAPSFILTER,GstCapsFilterClass)) #define GST_IS_CAPSFILTER(obj) \ (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_CAPSFILTER)) #define GST_IS_CAPSFILTER_CLASS(obj) \ (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_CAPSFILTER)) typedef struct _GstCapsFilter GstCapsFilter; typedef struct _GstCapsFilterClass GstCapsFilterClass; struct _GstCapsFilter { GstElement element; GstPad *srcpad; GstPad *sinkpad; GstCaps *filter_caps; }; struct _GstCapsFilterClass { GstElementClass element_class; }; GType gst_capsfilter_get_type (void); 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_capsfilter_debug); #define GST_CAT_DEFAULT gst_capsfilter_debug GstElementDetails gst_capsfilter_details = GST_ELEMENT_DETAILS ("CapsFilter", "Generic", "Pass data without modification, limiting formats", "David Schleef "); enum { PROP_0, PROP_FILTER_CAPS }; #define _do_init(bla) \ GST_DEBUG_CATEGORY_INIT (gst_capsfilter_debug, "capsfilter", 0, "capsfilter element"); GST_BOILERPLATE_FULL (GstCapsFilter, gst_capsfilter, GstElement, GST_TYPE_ELEMENT, _do_init); static void gst_capsfilter_finalize (GObject * object); static void gst_capsfilter_set_property (GObject * object, guint prop_id, const GValue * value, GParamSpec * pspec); static void gst_capsfilter_get_property (GObject * object, guint prop_id, GValue * value, GParamSpec * pspec); static GstCaps *gst_capsfilter_getcaps (GstPad * pad); static GstFlowReturn gst_capsfilter_chain (GstPad * pad, GstBuffer * buf); static void gst_capsfilter_base_init (gpointer g_class) { GstElementClass *gstelement_class = GST_ELEMENT_CLASS (g_class); 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)); gst_element_class_set_details (gstelement_class, &gst_capsfilter_details); } static void gst_capsfilter_finalize (GObject * object) { GstCapsFilter *capsfilter; capsfilter = GST_CAPSFILTER (object); gst_caps_unref (capsfilter->filter_caps); G_OBJECT_CLASS (parent_class)->finalize (object); } static void gst_capsfilter_class_init (GstCapsFilterClass * klass) { GObjectClass *gobject_class; GstElementClass *gstelement_class; gobject_class = G_OBJECT_CLASS (klass); gstelement_class = GST_ELEMENT_CLASS (klass); gobject_class->set_property = GST_DEBUG_FUNCPTR (gst_capsfilter_set_property); gobject_class->get_property = GST_DEBUG_FUNCPTR (gst_capsfilter_get_property); gobject_class->finalize = GST_DEBUG_FUNCPTR (gst_capsfilter_finalize); g_object_class_install_property (G_OBJECT_CLASS (klass), PROP_FILTER_CAPS, g_param_spec_boxed ("filter_caps", _("Filter caps"), _("Restrict the possible allowed formats"), GST_TYPE_CAPS, G_PARAM_READWRITE)); } static void gst_capsfilter_init (GstCapsFilter * capsfilter) { gst_element_create_all_pads (GST_ELEMENT (capsfilter)); capsfilter->srcpad = gst_element_get_pad (GST_ELEMENT (capsfilter), "src"); capsfilter->sinkpad = gst_element_get_pad (GST_ELEMENT (capsfilter), "sink"); gst_pad_set_getcaps_function (capsfilter->srcpad, gst_capsfilter_getcaps); gst_pad_set_getcaps_function (capsfilter->sinkpad, gst_capsfilter_getcaps); gst_pad_set_chain_function (capsfilter->sinkpad, gst_capsfilter_chain); capsfilter->filter_caps = gst_caps_new_any (); } static GstCaps * gst_capsfilter_getcaps (GstPad * pad) { GstPad *otherpad; GstCapsFilter *capsfilter = GST_CAPSFILTER (GST_OBJECT_PARENT (pad)); GstCaps *caps; GstCaps *icaps; otherpad = (pad == capsfilter->srcpad) ? capsfilter->sinkpad : capsfilter->srcpad; caps = gst_pad_peer_get_caps (otherpad); if (caps == NULL) caps = gst_caps_new_any (); icaps = gst_caps_intersect (caps, capsfilter->filter_caps); gst_caps_unref (caps); return icaps; } static GstFlowReturn gst_capsfilter_chain (GstPad * pad, GstBuffer * buf) { GstCapsFilter *capsfilter = GST_CAPSFILTER (GST_PAD_PARENT (pad)); gst_pad_push (capsfilter->srcpad, buf); return GST_FLOW_OK; } static void gst_capsfilter_set_property (GObject * object, guint prop_id, const GValue * value, GParamSpec * pspec) { GstCapsFilter *capsfilter; capsfilter = GST_CAPSFILTER (object); switch (prop_id) { case PROP_FILTER_CAPS:{ GstCaps *new_caps = gst_caps_copy (gst_value_get_caps (value)); GstCaps *old_caps; if (new_caps == NULL) { new_caps = gst_caps_new_any (); } old_caps = capsfilter->filter_caps; capsfilter->filter_caps = new_caps; gst_caps_unref (old_caps); /* FIXME: Need to activate these caps on the pads */ break; } default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); break; } } static void gst_capsfilter_get_property (GObject * object, guint prop_id, GValue * value, GParamSpec * pspec) { GstCapsFilter *capsfilter; capsfilter = GST_CAPSFILTER (object); switch (prop_id) { case PROP_FILTER_CAPS: gst_value_set_caps (value, capsfilter->filter_caps); break; default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); break; } }