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Elements: Downscale: Use BaseBin as base class

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Signed-off-by: Vasiliy Doylov <nekocwd@mainlining.org>
This commit is contained in:
Vasiliy Doylov 2025-05-29 17:57:44 +03:00
parent dda57d786d
commit 85213ec8c7
Signed by: NekoCWD
GPG key ID: B7BE22D44474A582
1 changed files with 44 additions and 48 deletions
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92
src/elements/downscale.vala
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@ -1,41 +1,43 @@
public class EyeNeko.Elements.Downscale : Gst.Bin {
public Gst.Element videoscale = Gst.ElementFactory.make("videoscale");
public Gst.Element capsfilter = Gst.ElementFactory.make("capsfilter");
Gst.Pad sinkpad;
Gst.Pad srcpad;
/* downscale.vala
*
* Copyright 2025 Vasiliy Doylov <nekocwd@mainlining.org>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*
* SPDX-License-Identifier: GPL-3.0-or-later
*/
public class EyeNeko.Elements.Downscale : BinBase {
public Gst.Element videoscale = Gst.ElementFactory.make ("videoscale");
public Gst.Element capsfilter = Gst.ElementFactory.make ("capsfilter");
public int max_size { get; set; default = 0; }
static construct {
set_static_metadata(
"downscale",
"Filter",
"Downscale video filter.",
"nekocwd@mainlining.org");
add_static_pad_template(
{
"sink",
Gst.PadDirection.SINK,
Gst.PadPresence.ALWAYS,
{ null, "video/x-raw" }
});
add_static_pad_template(
{
"src",
Gst.PadDirection.SRC,
Gst.PadPresence.ALWAYS,
{ null, "video/x-raw" }
});
set_static_metadata ("downscale",
"Filter",
"Downscale video filter.",
"nekocwd@mainlining.org");
}
static bool sink_event(Gst.Pad pad, Gst.Object? parent, owned Gst.Event event) {
static bool sink_event (Gst.Pad pad, Gst.Object? parent, owned Gst.Event event) {
var filter = (Downscale) parent;
if (event.type == Gst.EventType.CAPS) {
Gst.Caps caps;
event.parse_caps(out caps);
var info = new Gst.Video.Info.with_caps(caps);
var old_info = info.copy();
var max_dim = int.max(info.width, info.height);
event.parse_caps (out caps);
var info = new Gst.Video.Info.with_caps (caps);
var old_info = info.copy ();
var max_dim = int.max (info.width, info.height);
if (filter.max_size > 0 && max_dim > filter.max_size) {
double mult = (double) filter.max_size / (double) max_dim;
info.width = (int) (info.width * mult);
@ -45,30 +47,24 @@ public class EyeNeko.Elements.Downscale : Gst.Bin {
info.width++;
if (info.height % 2 > 0)
info.height++;
debug("%dx%d=S=>%dx%d", old_info.width, old_info.height, info.width, info.height);
var new_caps = caps.copy();
new_caps.set_simple("width", typeof (int), info.width);
new_caps.set_simple("height", typeof (int), info.height);
filter.capsfilter.set_property("caps", new_caps);
debug ("%dx%d=S=>%dx%d", old_info.width, old_info.height, info.width, info.height);
var new_caps = caps.copy ();
new_caps.set_simple ("width", typeof (int), info.width);
new_caps.set_simple ("height", typeof (int), info.height);
filter.capsfilter.set_property ("caps", new_caps);
}
return pad.event_default(parent, event);
return pad.event_default (parent, event);
}
public Downscale() {}
public Downscale.to(int max_size) {
public Downscale () {}
public Downscale.to (int max_size) {
_max_size = max_size;
}
construct {
// Child elements
add_many(videoscale, capsfilter);
videoscale.link(capsfilter);
// Sink Pad
sinkpad = new Gst.GhostPad("sink", videoscale.get_static_pad("sink"));
sinkpad.set_event_function(sink_event, null, null);
add_pad(sinkpad);
// Src Pad
srcpad = new Gst.GhostPad("src", capsfilter.get_static_pad("src"));
add_pad(srcpad);
add_many (videoscale, capsfilter);
videoscale.link (capsfilter);
add_pads (videoscale, capsfilter);
sinkpad.set_event_function (sink_event, null, null);
}
}