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f3fd4d7e90
Since d0133a2d11 "videoconvert: Allow
passthrough for ANY caps features" videoconvert will always claim that
it supports any kind of memory which is true in very specific case (when
it is running in passthrough mode). To get elements that autoplug
converters depending on the caps running in the pipeline (like
autovideoconvert), we need to have converters no lie about what they can
do when queried `accept_caps` or `query_caps`.
This still accepts any caps feature as before but it introduces
a restriction in the way we handle memory capsfeatures.
We keep previous behaviour in videoconvert and videoscale.
Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/898>
127 lines
3.9 KiB
C
127 lines
3.9 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 = (GObjectClass *) 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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((GstVideoConvertScaleClass *) klass)->any_memory = TRUE;
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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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}
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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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