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