mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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qroverlay: Factor out qroverlay logic to a base class
Part-of: <https://gitlab.freedesktop.org/gstreamer/gst-plugins-bad/-/merge_requests/1730>
This commit is contained in:
Thibault Saunier
GStreamer Merge Bot
parent
e6881aefa9
commit
4afa2d2c3d
2 changed files with 378 additions and 0 deletions
336
ext/qroverlay/gstbaseqroverlay.c
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336
ext/qroverlay/gstbaseqroverlay.c
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/*
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* GStreamer
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* Copyright (C) 2006 Stefan Kost <ensonic@users.sf.net>
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* Copyright (c) 2020 Anthony Violo <anthony.violo@ubicast.eu>
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* Copyright (c) 2020 Thibault Saunier <tsaunier@igalia.com>
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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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/**
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* plugin-qroverlay
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*
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* Since: 1.20
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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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#include <gst/gst.h>
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#include <gst/base/gstbasetransform.h>
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#include <json-glib/json-glib.h>
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#include <qrencode.h>
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#include <string.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include "gstbaseqroverlay.h"
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GST_DEBUG_CATEGORY_STATIC (gst_base_qr_overlay_debug);
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#define GST_CAT_DEFAULT gst_base_qr_overlay_debug
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enum
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{
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PROP_0,
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PROP_X_AXIS,
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PROP_Y_AXIS,
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PROP_PIXEL_SIZE,
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PROP_QRCODE_ERROR_CORRECTION,
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};
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typedef struct _GstBaseQROverlayPrivate GstBaseQROverlayPrivate;
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struct _GstBaseQROverlayPrivate
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{
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gfloat qrcode_size;
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guint qrcode_quality;
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guint span_frame;
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QRecLevel level;
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gfloat x_percent;
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gfloat y_percent;
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};
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#define PRIV(s) gst_base_qr_overlay_get_instance_private (GST_BASE_QR_OVERLAY (s))
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static GstStaticPadTemplate sink_template = GST_STATIC_PAD_TEMPLATE ("sink",
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GST_PAD_SINK,
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GST_PAD_ALWAYS,
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GST_STATIC_CAPS ("video/x-raw, "
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"format = (string) { I420 }, "
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"framerate = (fraction) [0, MAX], "
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"width = (int) [ 16, MAX ], " "height = (int) [ 16, MAX ]")
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);
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static GstStaticPadTemplate src_template = GST_STATIC_PAD_TEMPLATE ("src",
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GST_PAD_SRC,
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GST_PAD_ALWAYS,
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GST_STATIC_CAPS ("video/x-raw, "
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"format = (string) { I420 }, "
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"framerate = (fraction) [0, MAX], "
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"width = (int) [ 16, MAX ], " "height = (int) [ 16, MAX ]")
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);
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#define DEFAULT_PROP_QUALITY 1
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#define DEFAULT_PROP_PIXEL_SIZE 3
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#define GST_TYPE_QRCODE_QUALITY (gst_qrcode_quality_get_type())
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static GType
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gst_qrcode_quality_get_type (void)
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{
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static GType qrcode_quality_type = 0;
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static const GEnumValue qrcode_quality[] = {
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{0, "Level L", "Approx 7%"},
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{1, "Level M", "Approx 15%"},
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{2, "Level Q", "Approx 25%"},
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{3, "Level H", "Approx 30%"},
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{0, NULL, NULL},
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};
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if (!qrcode_quality_type) {
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qrcode_quality_type =
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g_enum_register_static ("GstQrcodeOverlayCorrection", qrcode_quality);
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}
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return qrcode_quality_type;
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}
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#define gst_base_qr_overlay_parent_class parent_class
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G_DEFINE_TYPE_WITH_PRIVATE (GstBaseQROverlay, gst_base_qr_overlay,
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GST_TYPE_VIDEO_FILTER);
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static void gst_base_qr_overlay_set_property (GObject * object, guint prop_id,
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const GValue * value, GParamSpec * pspec);
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static void gst_base_qr_overlay_get_property (GObject * object, guint prop_id,
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GValue * value, GParamSpec * pspec);
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static GstFlowReturn
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gst_base_qr_overlay_transform_frame_ip (GstVideoFilter * base,
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GstVideoFrame * frame);
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/* GObject vmethod implementations */
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/* initialize the qroverlay's class */
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static void
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gst_base_qr_overlay_class_init (GstBaseQROverlayClass * 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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gobject_class->set_property = gst_base_qr_overlay_set_property;
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gobject_class->get_property = gst_base_qr_overlay_get_property;
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g_object_class_install_property (gobject_class,
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PROP_X_AXIS, g_param_spec_float ("x",
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"X position (in percent of the width)",
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"X position (in percent of the width)",
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0.0, 100.0, 50.0, G_PARAM_READWRITE));
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g_object_class_install_property (gobject_class,
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PROP_Y_AXIS, g_param_spec_float ("y",
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"Y position (in percent of the height)",
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"Y position (in percent of the height)",
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0.0, 100.0, 50.0, G_PARAM_READWRITE));
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g_object_class_install_property (gobject_class,
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PROP_PIXEL_SIZE, g_param_spec_float ("pixel-size",
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"pixel-size", "Pixel size of each Qrcode pixel",
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1, 100.0, DEFAULT_PROP_PIXEL_SIZE, G_PARAM_READWRITE));
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g_object_class_install_property (gobject_class, PROP_QRCODE_ERROR_CORRECTION,
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g_param_spec_enum ("qrcode-error-correction", "qrcode-error-correction",
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"qrcode-error-correction", GST_TYPE_QRCODE_QUALITY,
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DEFAULT_PROP_QUALITY, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
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gst_element_class_add_pad_template (gstelement_class,
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gst_static_pad_template_get (&src_template));
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gst_element_class_add_pad_template (gstelement_class,
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gst_static_pad_template_get (&sink_template));
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gst_type_mark_as_plugin_api (GST_TYPE_QRCODE_QUALITY, 0);
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GST_VIDEO_FILTER_CLASS (klass)->transform_frame_ip =
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GST_DEBUG_FUNCPTR (gst_base_qr_overlay_transform_frame_ip);
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gst_type_mark_as_plugin_api (GST_TYPE_QRCODE_QUALITY, 0);
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}
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/* initialize the new element
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* initialize instance structure
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*/
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static void
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gst_base_qr_overlay_init (GstBaseQROverlay * filter)
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{
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GstBaseQROverlayPrivate *priv = PRIV (filter);
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priv->x_percent = 50.0;
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priv->y_percent = 50.0;
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priv->qrcode_quality = DEFAULT_PROP_QUALITY;
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priv->span_frame = 0;
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priv->qrcode_size = DEFAULT_PROP_PIXEL_SIZE;
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}
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static void
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gst_base_qr_overlay_set_property (GObject * object, guint prop_id,
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const GValue * value, GParamSpec * pspec)
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{
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GstBaseQROverlayPrivate *priv = PRIV (object);
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switch (prop_id) {
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case PROP_X_AXIS:
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priv->x_percent = g_value_get_float (value);
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break;
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case PROP_Y_AXIS:
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priv->y_percent = g_value_get_float (value);
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break;
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case PROP_PIXEL_SIZE:
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priv->qrcode_size = g_value_get_float (value);
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break;
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case PROP_QRCODE_ERROR_CORRECTION:
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priv->qrcode_quality = g_value_get_enum (value);
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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 void
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gst_base_qr_overlay_get_property (GObject * object, guint prop_id,
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GValue * value, GParamSpec * pspec)
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{
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GstBaseQROverlayPrivate *priv = PRIV (object);
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switch (prop_id) {
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case PROP_X_AXIS:
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g_value_set_float (value, priv->x_percent);
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break;
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case PROP_Y_AXIS:
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g_value_set_float (value, priv->y_percent);
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break;
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case PROP_PIXEL_SIZE:
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g_value_set_float (value, priv->qrcode_size);
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break;
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case PROP_QRCODE_ERROR_CORRECTION:
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g_value_set_enum (value, priv->qrcode_quality);
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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 void
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overlay_qr_in_frame (GstBaseQROverlay * filter, QRcode * qrcode,
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GstVideoFrame * frame)
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{
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GstBaseQROverlayPrivate *priv = PRIV (filter);
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guchar *source_data;
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gint32 k, y, x, yy, square_size, line = 0;
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int x1, x2, y1, y2;
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guint8 *d;
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gint stride;
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square_size = (qrcode->width + 4 * 2) * priv->qrcode_size;
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/* White bg */
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x1 = (int) (GST_VIDEO_FRAME_WIDTH (frame) -
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square_size) * (priv->x_percent / 100);
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x1 = GST_ROUND_DOWN_2 (x1);
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x2 = x1 + square_size;
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y1 = (int) (GST_VIDEO_FRAME_HEIGHT (frame) -
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square_size) * (priv->y_percent / 100);
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y1 = GST_ROUND_DOWN_4 (y1);
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y2 = y1 + square_size;
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d = GST_VIDEO_FRAME_PLANE_DATA (frame, 0);
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stride = GST_VIDEO_FRAME_PLANE_STRIDE (frame, 0);
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/* Start drawing the white luma plane */
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for (y = y1; y < y2; y++) {
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for (x = x1; x < x2; x += square_size)
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memset (&d[y * stride + x], 0xff, square_size);
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}
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/* Draw the black QR code blocks with 4px white space around it
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* on top */
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line += 4 * priv->qrcode_size * stride;
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source_data = qrcode->data;
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for (y = 0; y < qrcode->width; y++) {
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for (x = 0; x < (qrcode->width); x++) {
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for (yy = 0; yy < priv->qrcode_size; yy++) {
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k = ((((line + (4 * priv->qrcode_size))) + stride * yy +
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x * priv->qrcode_size) + x1) + (y1 * stride);
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if (*source_data & 1) {
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memset (d + k, 0, priv->qrcode_size);
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}
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}
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source_data++;
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}
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line += (stride * priv->qrcode_size);
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}
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/* Set Chrominance planes */
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x1 /= 2;
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x2 /= 2;
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y1 /= 2;
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y2 /= 2;
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stride = GST_VIDEO_FRAME_PLANE_STRIDE (frame, 1);
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for (y = y1; y < y2; y++) {
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for (x = x1; x < x2; x += (x2 - x1)) {
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d = GST_VIDEO_FRAME_PLANE_DATA (frame, 1);
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memset (&d[y * stride + x], 128, (x2 - x1));
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d = GST_VIDEO_FRAME_PLANE_DATA (frame, 2);
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memset (&d[y * stride + x], 128, (x2 - x1));
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}
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}
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QRcode_free (qrcode);
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}
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/* GstBaseTransform vmethod implementations */
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/* this function does the actual processing
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*/
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static GstFlowReturn
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gst_base_qr_overlay_transform_frame_ip (GstVideoFilter * base,
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GstVideoFrame * frame)
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{
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GstBaseQROverlayPrivate *priv = PRIV (base);
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QRcode *qrcode;
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gchar *content;
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GstClockTime rtime =
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gst_segment_to_running_time (&GST_BASE_TRANSFORM (base)->segment,
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GST_FORMAT_TIME, GST_BUFFER_PTS (frame->buffer));
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if (GST_CLOCK_TIME_IS_VALID (rtime))
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gst_object_sync_values (GST_OBJECT (base), rtime);
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content =
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GST_BASE_QR_OVERLAY_GET_CLASS (base)->get_content (GST_BASE_QR_OVERLAY
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(base), frame);
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GST_INFO_OBJECT (base, "String will be encoded : %s", content);
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qrcode = QRcode_encodeString (content, 0, priv->qrcode_quality, QR_MODE_8, 0);
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if (qrcode) {
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GST_DEBUG_OBJECT (base, "String encoded");
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overlay_qr_in_frame (GST_BASE_QR_OVERLAY (base), qrcode, frame);
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} else {
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GST_WARNING_OBJECT (base, "Could not encode content: %s", content);
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}
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g_free (content);
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return GST_FLOW_OK;
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}
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42
ext/qroverlay/gstbaseqroverlay.h
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42
ext/qroverlay/gstbaseqroverlay.h
Normal file
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@ -0,0 +1,42 @@
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/*
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* GStreamer
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* Copyright (C) 2006 Stefan Kost <ensonic@users.sf.net>
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* Copyright (c) 2020 Anthony Violo <anthony.violo@ubicast.eu>
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* Copyright (c) 2020 Thibault Saunier <tsaunier@igalia.com>
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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
|
||||
* 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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#ifndef __GST_BASE_QR_OVERLAY_H__
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#define __GST_BASE_QR_OVERLAY_H__
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#include <gst/gst.h>
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#include <gst/video/gstvideofilter.h>
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G_BEGIN_DECLS
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#define GST_TYPE_BASE_QR_OVERLAY (gst_base_qr_overlay_get_type())
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G_DECLARE_DERIVABLE_TYPE (GstBaseQROverlay, gst_base_qr_overlay, GST, BASE_QR_OVERLAY, GstVideoFilter);
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struct _GstBaseQROverlayClass
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{
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GstVideoFilterClass parent;
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gchar* (*get_content) (GstBaseQROverlay *self, GstVideoFrame *frame);
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};
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G_END_DECLS
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#endif /* __GST_BASE_QR_OVERLAY_H__ */
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