/* GStreamer * Copyright (C) <1999> Erik Walthinsen * * 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. */ /*#define DEBUG_ENABLED */ #include /* elementfactory information */ static GstElementDetails videoscale_details = { "Video scaler", "Filter/Video", "LGPL", "Resizes video", VERSION, "Wim Taymans ", "(C) 2000", }; /* GstVideoscale signals and args */ enum { /* FILL ME */ LAST_SIGNAL }; enum { ARG_0, ARG_WIDTH, ARG_HEIGHT, ARG_METHOD, /* FILL ME */ }; GST_PAD_TEMPLATE_FACTORY (sink_templ, "sink", GST_PAD_SINK, GST_PAD_ALWAYS, GST_CAPS_NEW ( "videoscale_caps", "video/raw", "format", GST_PROPS_FOURCC (GST_MAKE_FOURCC ('I','4','2','0')) ) ) GST_PAD_TEMPLATE_FACTORY (src_templ, "src", GST_PAD_SRC, GST_PAD_ALWAYS, GST_CAPS_NEW ( "videoscale_caps", "video/raw", "format", GST_PROPS_FOURCC (GST_MAKE_FOURCC ('I','4','2','0')) ) ) #define GST_TYPE_VIDEOSCALE_METHOD (gst_videoscale_method_get_type()) static GType gst_videoscale_method_get_type (void) { static GType videoscale_method_type = 0; static GEnumValue videoscale_methods[] = { { GST_VIDEOSCALE_POINT_SAMPLE, "0", "Point Sample" }, { GST_VIDEOSCALE_NEAREST, "1", "Nearest" }, { GST_VIDEOSCALE_BILINEAR, "2", "Bilinear" }, { GST_VIDEOSCALE_BICUBIC, "3", "Bicubic" }, { 0, NULL, NULL }, }; if (!videoscale_method_type) { videoscale_method_type = g_enum_register_static ("GstVideoscaleMethod", videoscale_methods); } return videoscale_method_type; } static void gst_videoscale_class_init (GstVideoscaleClass *klass); static void gst_videoscale_init (GstVideoscale *videoscale); static void gst_videoscale_set_property (GObject *object, guint prop_id, const GValue *value, GParamSpec *pspec); static void gst_videoscale_get_property (GObject *object, guint prop_id, GValue *value, GParamSpec *pspec); static void gst_videoscale_chain (GstPad *pad, GstBuffer *buf); static GstElementClass *parent_class = NULL; /*static guint gst_videoscale_signals[LAST_SIGNAL] = { 0 }; */ GType gst_videoscale_get_type (void) { static GType videoscale_type = 0; if (!videoscale_type) { static const GTypeInfo videoscale_info = { sizeof(GstVideoscaleClass), NULL, NULL, (GClassInitFunc)gst_videoscale_class_init, NULL, NULL, sizeof(GstVideoscale), 0, (GInstanceInitFunc)gst_videoscale_init, }; videoscale_type = g_type_register_static(GST_TYPE_ELEMENT, "GstVideoscale", &videoscale_info, 0); } return videoscale_type; } static void gst_videoscale_class_init (GstVideoscaleClass *klass) { GObjectClass *gobject_class; GstElementClass *gstelement_class; gobject_class = (GObjectClass*)klass; gstelement_class = (GstElementClass*)klass; g_object_class_install_property(G_OBJECT_CLASS(klass), ARG_WIDTH, g_param_spec_int("width","width","width", G_MININT,G_MAXINT,0,G_PARAM_READWRITE)); /* CHECKME */ g_object_class_install_property(G_OBJECT_CLASS(klass), ARG_HEIGHT, g_param_spec_int("height","height","height", G_MININT,G_MAXINT,0,G_PARAM_READWRITE)); /* CHECKME */ g_object_class_install_property(G_OBJECT_CLASS(klass), ARG_METHOD, g_param_spec_enum("method","method","method", GST_TYPE_VIDEOSCALE_METHOD,0,G_PARAM_READWRITE)); /* CHECKME! */ parent_class = g_type_class_ref(GST_TYPE_ELEMENT); gobject_class->set_property = gst_videoscale_set_property; gobject_class->get_property = gst_videoscale_get_property; } /* static GstPadNegotiateReturn videoscale_negotiate_src (GstPad *pad, GstCaps **caps, gpointer *data) { GstVideoscale *videoscale = GST_VIDEOSCALE (gst_pad_get_parent (pad)); GST_DEBUG(0,"videoscale_negotiate_src"); if(*caps==NULL){ return GST_PAD_NEGOTIATE_FAIL; } *caps = GST_CAPS_NEW ( "videoscale_caps", "video/raw", "format", GST_PROPS_FOURCC (videoscale->format), "width", GST_PROPS_INT (videoscale->targetwidth), "height", GST_PROPS_INT (videoscale->targetheight) ); return GST_PAD_NEGOTIATE_AGREE; } static GstPadNegotiateReturn videoscale_negotiate_sink (GstPad *pad, GstCaps **caps, gpointer *data) { GST_DEBUG(0,"videoscale_negotiate_sink"); if (*caps==NULL) return GST_PAD_NEGOTIATE_FAIL; return GST_PAD_NEGOTIATE_AGREE; } */ static GstPadConnectReturn gst_videoscale_sinkconnect (GstPad *pad, GstCaps *caps) { GstVideoscale *videoscale; GST_DEBUG(0,"gst_videoscale_sinkconnect"); videoscale = GST_VIDEOSCALE (gst_pad_get_parent (pad)); if (!GST_CAPS_IS_FIXED (caps)) { return GST_PAD_LINK_DELAYED; } gst_caps_get_fourcc_int (caps, "format", &videoscale->format); gst_caps_get_int (caps, "width", &videoscale->width); gst_caps_get_int (caps, "height", &videoscale->height); gst_videoscale_setup(videoscale); GST_DEBUG (0,"target size %d x %d",videoscale->targetwidth, videoscale->targetheight); GST_DEBUG(0,"width %d",videoscale->targetwidth); return gst_pad_try_set_caps (videoscale->srcpad, GST_CAPS_NEW ( "videoscale_src", "video/raw", "format", GST_PROPS_FOURCC (videoscale->format), "width", GST_PROPS_INT (videoscale->targetwidth), "height", GST_PROPS_INT (videoscale->targetheight) )); } static void gst_videoscale_init (GstVideoscale *videoscale) { GST_DEBUG(0,"gst_videoscale_init"); videoscale->sinkpad = gst_pad_new_from_template ( GST_PAD_TEMPLATE_GET (sink_templ), "sink"); /*gst_pad_set_negotiate_function(videoscale->sinkpad,videoscale_negotiate_sink); */ gst_element_add_pad(GST_ELEMENT(videoscale),videoscale->sinkpad); gst_pad_set_chain_function(videoscale->sinkpad,gst_videoscale_chain); gst_pad_set_link_function(videoscale->sinkpad,gst_videoscale_sinkconnect); videoscale->srcpad = gst_pad_new_from_template ( GST_PAD_TEMPLATE_GET (src_templ), "src"); /*gst_pad_set_negotiate_function(videoscale->srcpad,videoscale_negotiate_src); */ gst_element_add_pad(GST_ELEMENT(videoscale),videoscale->srcpad); videoscale->targetwidth = -1; videoscale->targetheight = -1; videoscale->method = GST_VIDEOSCALE_NEAREST; /*videoscale->method = GST_VIDEOSCALE_BILINEAR; */ /*videoscale->method = GST_VIDEOSCALE_POINT_SAMPLE; */ } static void gst_videoscale_chain (GstPad *pad, GstBuffer *buf) { GstVideoscale *videoscale; guchar *data; gulong size; GstBuffer *outbuf; GST_DEBUG (0,"gst_videoscale_chain"); g_return_if_fail (pad != NULL); g_return_if_fail (GST_IS_PAD (pad)); g_return_if_fail (buf != NULL); videoscale = GST_VIDEOSCALE (gst_pad_get_parent (pad)); data = GST_BUFFER_DATA(buf); size = GST_BUFFER_SIZE(buf); if(!videoscale->scale_cc){ gst_caps_get_int (gst_pad_get_caps(pad), "format", &videoscale->format); gst_videoscale_setup(videoscale); } GST_DEBUG (0,"gst_videoscale_chain: got buffer of %ld bytes in '%s'",size, GST_OBJECT_NAME (videoscale)); GST_DEBUG(0,"size=%ld from=%dx%d to=%dx%d newsize=%d", size, videoscale->width, videoscale->height, videoscale->targetwidth, videoscale->targetheight, videoscale->targetwidth*videoscale->targetheight + videoscale->targetwidth*videoscale->targetheight/2); if(videoscale->targetwidth==videoscale->width && videoscale->targetheight==videoscale->height){ gst_pad_push(videoscale->srcpad, buf); }else{ outbuf = gst_buffer_new(); /* XXX this is wrong for anything but I420 */ GST_BUFFER_SIZE(outbuf) = videoscale->targetwidth*videoscale->targetheight + videoscale->targetwidth*videoscale->targetheight/2; GST_BUFFER_DATA(outbuf) = g_malloc (videoscale->targetwidth*videoscale->targetheight*2); GST_BUFFER_TIMESTAMP(outbuf) = GST_BUFFER_TIMESTAMP(buf); /*g_return_if_fail(videoscale->scale_cc != NULL); */ videoscale->scale_cc(videoscale, data, GST_BUFFER_DATA(outbuf)); GST_DEBUG (0,"gst_videoscale_chain: pushing buffer of %d bytes in '%s'",GST_BUFFER_SIZE(outbuf), GST_OBJECT_NAME (videoscale)); gst_pad_push(videoscale->srcpad, outbuf); gst_buffer_unref(buf); } } static void gst_videoscale_set_property (GObject *object, guint prop_id, const GValue *value, GParamSpec *pspec) { GstVideoscale *src; /* it's not null if we got it, but it might not be ours */ g_return_if_fail(GST_IS_VIDEOSCALE(object)); src = GST_VIDEOSCALE(object); GST_DEBUG(0,"gst_videoscale_set_property"); switch (prop_id) { case ARG_WIDTH: src->targetwidth = g_value_get_int (value); break; case ARG_HEIGHT: src->targetheight = g_value_get_int (value); break; case ARG_METHOD: src->method = g_value_get_enum (value); break; default: break; } } static void gst_videoscale_get_property (GObject *object, guint prop_id, GValue *value, GParamSpec *pspec) { GstVideoscale *src; /* it's not null if we got it, but it might not be ours */ g_return_if_fail(GST_IS_VIDEOSCALE(object)); src = GST_VIDEOSCALE(object); switch (prop_id) { case ARG_WIDTH: g_value_set_int (value, src->targetwidth); break; case ARG_HEIGHT: g_value_set_int (value, src->targetheight); break; case ARG_METHOD: g_value_set_enum (value, src->method); break; default: G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec); break; } } static gboolean plugin_init (GModule *module, GstPlugin *plugin) { GstElementFactory *factory; /* create an elementfactory for the videoscale element */ factory = gst_element_factory_new("videoscale",GST_TYPE_VIDEOSCALE, &videoscale_details); g_return_val_if_fail(factory != NULL, FALSE); gst_element_factory_add_pad_template (factory, GST_PAD_TEMPLATE_GET (sink_templ)); gst_element_factory_add_pad_template (factory, GST_PAD_TEMPLATE_GET (src_templ)); gst_plugin_add_feature (plugin, GST_PLUGIN_FEATURE (factory)); return TRUE; } GstPluginDesc plugin_desc = { GST_VERSION_MAJOR, GST_VERSION_MINOR, "videoscale", plugin_init };