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https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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e7f13ede0f
Our pad templates already expose ANY feature and the code supports that case even if only for the passthrough, we should not disable that feature. Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/4733>
136 lines
4.3 KiB
C
136 lines
4.3 KiB
C
/* GStreamer
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* Copyright (C) <1999> Erik Walthinsen <omega@cse.ogi.edu>
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* Copyright (C) 2005-2012 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., 51 Franklin St, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*/
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/**
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* SECTION:element-videoscale
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* @title: videoscale
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* @see_also: videorate, videoconvert
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*
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* This element resizes video frames. By default the element will try to
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* negotiate to the same size on the source and sinkpad so that no scaling
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* is needed. It is therefore safe to insert this element in a pipeline to
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* get more robust behaviour without any cost if no scaling is needed.
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*
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* This element supports a wide range of color spaces including various YUV and
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* RGB formats and is therefore generally able to operate anywhere in a
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* pipeline.
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*
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* ## Example pipelines
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* |[
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* gst-launch-1.0 -v filesrc location=videotestsrc.ogg ! oggdemux ! theoradec ! videoconvert ! videoscale ! autovideosink
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* ]|
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* Decode an Ogg/Theora and display the video. If the video sink chosen
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* cannot perform scaling, the video scaling will be performed by videoscale
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* when you resize the video window.
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* To create the test Ogg/Theora file refer to the documentation of theoraenc.
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* |[
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* gst-launch-1.0 -v filesrc location=videotestsrc.ogg ! oggdemux ! theoradec ! videoconvert ! videoscale ! video/x-raw,width=100 ! autovideosink
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* ]|
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* Decode an Ogg/Theora and display the video with a width of 100.
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*
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#define DEFAULT_PROP_GAMMA_DECODE FALSE
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#include "gstvideoscale.h"
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G_DEFINE_TYPE (GstVideoScale, gst_video_scale, GST_TYPE_VIDEO_CONVERT_SCALE);
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GST_ELEMENT_REGISTER_DEFINE (videoscale, "videoscale",
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GST_RANK_MARGINAL, gst_video_scale_get_type ());
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enum
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{
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PROP_0,
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PROP_GAMMA_DECODE
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};
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static void
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gst_video_scale_get_property (GObject * object, guint prop_id,
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GValue * value, GParamSpec * pspec)
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{
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switch (prop_id) {
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case PROP_GAMMA_DECODE:
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{
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gint mode;
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g_object_get (object, "gamma-mode", &mode, NULL);
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g_value_set_boolean (value, mode == GST_VIDEO_GAMMA_MODE_REMAP);
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break;
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}
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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_video_scale_set_property (GObject * object, guint prop_id,
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const GValue * value, GParamSpec * pspec)
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{
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switch (prop_id) {
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case PROP_GAMMA_DECODE:
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{
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if (g_value_get_boolean (value))
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g_object_set (object, "gamma-mode", GST_VIDEO_GAMMA_MODE_REMAP, NULL);
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else
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g_object_set (object, "gamma-mode", GST_VIDEO_GAMMA_MODE_NONE, NULL);
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break;
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}
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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_video_scale_class_init (GstVideoScaleClass * klass)
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{
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GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
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GstElementClass *element_class = GST_ELEMENT_CLASS (klass);
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GstVideoConvertScaleClass *convertscale_class =
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GST_VIDEO_CONVERT_SCALE_CLASS (klass);
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gobject_class->set_property = gst_video_scale_set_property;
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gobject_class->get_property = gst_video_scale_get_property;
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g_object_class_install_property (gobject_class, PROP_GAMMA_DECODE,
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g_param_spec_boolean ("gamma-decode", "Gamma Decode",
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"Decode gamma before scaling", DEFAULT_PROP_GAMMA_DECODE,
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G_PARAM_CONSTRUCT | G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
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gst_element_class_set_static_metadata (element_class,
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"Video scaler", "Filter/Converter/Video/Scaler",
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"Resizes video", "Wim Taymans <wim.taymans@gmail.com>");
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convertscale_class->converts = FALSE;
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convertscale_class->scales = TRUE;
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}
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static void
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gst_video_scale_init (GstVideoScale * self)
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{
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}
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