2020-07-09 16:37:55 +00:00
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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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2020-07-09 17:05:20 +00:00
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* Copyright (c) 2020 Anthony Violo <anthony.violo@ubicast.eu>
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2020-07-09 16:37:55 +00:00
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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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* SECTION:element-qroverlay
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*
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2020-07-09 16:49:51 +00:00
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* This element will build a Json string that contains a description of the
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* buffer and will convert the string to a QRcode. The QRcode contains a
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* timestamp, a buffer number, a framerate and some custom extra-data. Each
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* frame will have a Qrcode overlaid in the video stream. Some properties are
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* available to set the position and to define its size. You can add custom data
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* with the properties #qroverlay:extra-data-name and
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* #qroverlay:extra-data-array. You can also define the quality of the Qrcode
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* with #qroverlay:qrcode-error-correction. You can also define interval and
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* span of #qrovlerlay:extra-data-name #qrovlerlay:extra-data-array
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*
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* ## Example launch line
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*
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* ``` bash
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2020-07-09 16:37:55 +00:00
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* gst-launch -v -m videotestsrc ! qroverlay ! fakesink silent=TRUE
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2020-07-09 16:49:51 +00:00
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* ```
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*
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* Since: 1.20
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2020-07-09 16:37:55 +00:00
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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 <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 "gstqroverlay.h"
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2020-07-09 16:49:51 +00:00
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GST_DEBUG_CATEGORY_STATIC (gst_qr_overlay_debug);
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#define GST_CAT_DEFAULT gst_qr_overlay_debug
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2020-07-09 16:37:55 +00:00
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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_DATA_INTERVAL_BUFFERS,
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PROP_DATA_SPAN_BUFFERS,
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PROP_EXTRA_DATA_NAME,
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PROP_EXTRA_DATA_ARRAY,
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PROP_QRCODE_ERROR_CORRECTION,
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};
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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 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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2020-07-09 16:49:51 +00:00
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#define gst_qr_overlay_parent_class parent_class
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G_DEFINE_TYPE (GstQROverlay, gst_qr_overlay, GST_TYPE_BASE_TRANSFORM);
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2020-07-09 16:37:55 +00:00
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static gboolean
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2020-07-09 16:49:51 +00:00
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gst_qr_overlay_set_caps (GstBaseTransform * trans, GstCaps * in, GstCaps * out);
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2020-07-09 16:37:55 +00:00
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2020-07-09 16:49:51 +00:00
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static void gst_qr_overlay_set_property (GObject * object, guint prop_id,
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2020-07-09 16:37:55 +00:00
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const GValue * value, GParamSpec * pspec);
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2020-07-09 16:49:51 +00:00
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static void gst_qr_overlay_get_property (GObject * object, guint prop_id,
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2020-07-09 16:37:55 +00:00
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GValue * value, GParamSpec * pspec);
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2020-07-09 16:49:51 +00:00
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static GstFlowReturn gst_qr_overlay_transform_ip (GstBaseTransform * base,
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2020-07-09 16:37:55 +00:00
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GstBuffer * outbuf);
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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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2020-07-09 16:49:51 +00:00
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gst_qr_overlay_class_init (GstQROverlayClass * klass)
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2020-07-09 16:37:55 +00:00
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{
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GObjectClass *gobject_class;
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GstElementClass *gstelement_class;
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2020-07-09 16:51:23 +00:00
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GstBaseTransformClass *trans_class;
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2020-07-09 16:37:55 +00:00
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gobject_class = (GObjectClass *) klass;
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gstelement_class = (GstElementClass *) klass;
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2020-07-09 16:51:23 +00:00
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trans_class = (GstBaseTransformClass *) klass;
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2020-07-09 16:37:55 +00:00
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2020-07-09 16:49:51 +00:00
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gobject_class->set_property = gst_qr_overlay_set_property;
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gobject_class->get_property = gst_qr_overlay_get_property;
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2020-07-09 16:37:55 +00:00
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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, 1, G_PARAM_READWRITE));
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g_object_class_install_property (gobject_class,
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PROP_DATA_INTERVAL_BUFFERS,
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g_param_spec_int64 ("extra-data-interval-buffers",
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"extra-data-interval-buffers",
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2020-07-09 16:49:51 +00:00
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"Extra data append into the Qrcode at the first buffer of each "
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" interval", 0, G_MAXINT64, 60, G_PARAM_READWRITE));
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2020-07-09 16:37:55 +00:00
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g_object_class_install_property (gobject_class,
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PROP_DATA_SPAN_BUFFERS, g_param_spec_int64 ("extra-data-span-buffers",
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"extra-data-span-buffers",
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2020-07-09 16:49:51 +00:00
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"Numbers of consecutive buffers that the extra data will be inserted "
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" (counting the first buffer)", 0, G_MAXINT64, 1, G_PARAM_READWRITE));
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2020-07-09 16:37:55 +00:00
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g_object_class_install_property (gobject_class,
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PROP_EXTRA_DATA_NAME, g_param_spec_string ("extra-data-name",
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2020-07-09 16:49:51 +00:00
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"Extra data name",
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"Json key name for extra append data", NULL, G_PARAM_READWRITE));
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2020-07-09 16:37:55 +00:00
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g_object_class_install_property (gobject_class,
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PROP_EXTRA_DATA_ARRAY, g_param_spec_string ("extra-data-array",
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2020-07-09 16:49:51 +00:00
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"Extra data array",
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"List of comma separated values that the extra data value will be "
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" cycled from at each interval, example array structure :"
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" \"240,480,720,960,1200,1440,1680,1920\"", NULL, G_PARAM_READWRITE));
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2020-07-09 16:37:55 +00:00
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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_set_details_simple (gstelement_class,
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"qroverlay",
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"Qrcode overlay containing buffer information",
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"Overlay Qrcodes over each buffer with buffer information and custom data",
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"Anthony Violo <anthony.violo@ubicast.eu>");
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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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2020-07-09 16:49:51 +00:00
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gst_type_mark_as_plugin_api (GST_TYPE_QRCODE_QUALITY, 0);
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2020-07-09 16:37:55 +00:00
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GST_BASE_TRANSFORM_CLASS (klass)->transform_ip =
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2020-07-09 16:49:51 +00:00
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GST_DEBUG_FUNCPTR (gst_qr_overlay_transform_ip);
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trans_class->set_caps = GST_DEBUG_FUNCPTR (gst_qr_overlay_set_caps);
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2020-07-09 16:37:55 +00:00
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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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2020-07-09 16:49:51 +00:00
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gst_qr_overlay_init (GstQROverlay * filter)
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2020-07-09 16:37:55 +00:00
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{
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filter->frame_number = 1;
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filter->x_percent = 50.0;
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filter->y_percent = 50.0;
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filter->qrcode_quality = DEFAULT_PROP_QUALITY;
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filter->level = QR_ECLEVEL_M;
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filter->extra_data_name = 0;
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filter->extra_data_array = 0;
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filter->extra_data_enabled = FALSE;
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filter->array_counter = 0;
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filter->array_size = 1;
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filter->extra_data_interval_buffers = 60;
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filter->extra_data_span_buffers = 1;
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filter->span_frame = 0;
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filter->qrcode_size = 1;
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}
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static void
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2020-07-09 16:49:51 +00:00
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gst_qr_overlay_set_property (GObject * object, guint prop_id,
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2020-07-09 16:37:55 +00:00
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const GValue * value, GParamSpec * pspec)
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{
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2020-07-09 16:49:51 +00:00
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GstQROverlay *filter = GST_QR_OVERLAY (object);
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2020-07-09 16:37:55 +00:00
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switch (prop_id) {
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case PROP_X_AXIS:
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filter->x_percent = g_value_get_float (value);
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break;
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case PROP_Y_AXIS:
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filter->y_percent = g_value_get_float (value);
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break;
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case PROP_PIXEL_SIZE:
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filter->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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filter->qrcode_quality = g_value_get_enum (value);
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break;
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case PROP_DATA_INTERVAL_BUFFERS:
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filter->extra_data_interval_buffers = g_value_get_int64 (value);
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break;
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case PROP_DATA_SPAN_BUFFERS:
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filter->extra_data_span_buffers = g_value_get_int64 (value);
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break;
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case PROP_EXTRA_DATA_NAME:
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filter->extra_data_name = g_value_dup_string (value);
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break;
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case PROP_EXTRA_DATA_ARRAY:
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filter->extra_data_array = g_value_dup_string (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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2020-07-09 16:49:51 +00:00
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gst_qr_overlay_get_property (GObject * object, guint prop_id,
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2020-07-09 16:37:55 +00:00
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GValue * value, GParamSpec * pspec)
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{
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2020-07-09 16:49:51 +00:00
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GstQROverlay *filter = GST_QR_OVERLAY (object);
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2020-07-09 16:37:55 +00:00
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switch (prop_id) {
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case PROP_X_AXIS:
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g_value_set_float (value, filter->x_percent);
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break;
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case PROP_Y_AXIS:
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g_value_set_float (value, filter->y_percent);
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break;
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case PROP_PIXEL_SIZE:
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g_value_set_float (value, filter->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, filter->qrcode_quality);
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break;
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case PROP_DATA_INTERVAL_BUFFERS:
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g_value_set_int64 (value, filter->extra_data_interval_buffers);
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break;
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case PROP_DATA_SPAN_BUFFERS:
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g_value_set_int64 (value, filter->extra_data_span_buffers);
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break;
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case PROP_EXTRA_DATA_NAME:
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g_value_set_string (value, filter->extra_data_name);
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break;
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case PROP_EXTRA_DATA_ARRAY:
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g_value_set_string (value, filter->extra_data_array);
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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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2020-07-09 16:49:51 +00:00
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gst_qr_overlay_set_caps (GstBaseTransform * trans, GstCaps * in, GstCaps * out)
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2020-07-09 16:37:55 +00:00
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{
|
2020-07-09 16:49:51 +00:00
|
|
|
GstQROverlay *filter = GST_QR_OVERLAY (trans);
|
2020-07-09 16:37:55 +00:00
|
|
|
GstStructure *structure;
|
|
|
|
const GValue *framerate_value;
|
|
|
|
guint i;
|
|
|
|
|
|
|
|
structure = gst_caps_get_structure (in, 0);
|
|
|
|
framerate_value = gst_structure_get_value (structure, "framerate");
|
|
|
|
filter->framerate_string = g_strdup_value_contents (framerate_value);
|
|
|
|
filter->width =
|
|
|
|
atoi (g_strdup_value_contents (gst_structure_get_value (structure,
|
|
|
|
"width")));
|
|
|
|
filter->height =
|
|
|
|
atoi (g_strdup_value_contents (gst_structure_get_value (structure,
|
|
|
|
"height")));
|
|
|
|
switch (filter->qrcode_quality) {
|
|
|
|
case 0:
|
|
|
|
filter->level = QR_ECLEVEL_L;
|
|
|
|
break;
|
|
|
|
case 1:
|
|
|
|
filter->level = QR_ECLEVEL_M;
|
|
|
|
break;
|
|
|
|
case 2:
|
|
|
|
filter->level = QR_ECLEVEL_Q;
|
|
|
|
break;
|
|
|
|
case 3:
|
|
|
|
filter->level = QR_ECLEVEL_H;
|
|
|
|
break;
|
|
|
|
default:
|
|
|
|
GST_ERROR_OBJECT (filter, "Invalid level");
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
if (filter->extra_data_array && filter->extra_data_name
|
|
|
|
&& strlen (filter->extra_data_array) > 3
|
|
|
|
&& strlen (filter->extra_data_name) > 0) {
|
|
|
|
filter->extra_data_enabled = TRUE;
|
|
|
|
for (i = 0; filter->extra_data_array[i]; i++)
|
|
|
|
if (filter->extra_data_array[i] == ',')
|
|
|
|
filter->array_size++;
|
|
|
|
}
|
|
|
|
return TRUE;
|
|
|
|
}
|
|
|
|
|
2020-07-09 16:51:23 +00:00
|
|
|
static gchar *
|
2020-07-09 16:49:51 +00:00
|
|
|
parse_data_array (GstQROverlay * filter, gchar * value_in_array)
|
2020-07-09 16:37:55 +00:00
|
|
|
{
|
|
|
|
guint value_size;
|
|
|
|
guint i, j, k, count;
|
|
|
|
|
|
|
|
GST_LOG_OBJECT (filter, "Select data in array");
|
|
|
|
for (i = 0, count = 0; filter->extra_data_array[i]; i++) {
|
|
|
|
if (filter->extra_data_array[i] == ',')
|
|
|
|
count++;
|
|
|
|
if (count == filter->array_counter)
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
for (j = i, value_size = 0; filter->extra_data_array[j]; j++) {
|
|
|
|
value_size++;
|
|
|
|
if (j > i && (filter->extra_data_array[j] == ','
|
|
|
|
|| filter->extra_data_array[j] == '"'))
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
if (!(value_in_array = malloc (value_size + 1 * sizeof (char *))))
|
|
|
|
GST_ERROR_OBJECT (filter, "can't alloc memory to value in array");
|
|
|
|
for (j = i, k = 0; filter->extra_data_array[j]; j++) {
|
|
|
|
if (j > i && (filter->extra_data_array[j] == ','
|
|
|
|
|| filter->extra_data_array[j] == '"'))
|
|
|
|
break;
|
|
|
|
else if (filter->extra_data_array[j] != ','
|
|
|
|
&& filter->extra_data_array[j] != '"') {
|
|
|
|
value_in_array[k] = filter->extra_data_array[j];
|
|
|
|
k++;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
value_in_array[k] = '\0';
|
|
|
|
return value_in_array;
|
|
|
|
}
|
|
|
|
|
2020-07-09 16:51:23 +00:00
|
|
|
static gchar *
|
2020-07-09 16:37:55 +00:00
|
|
|
build_string (GstBaseTransform * base, GstBuffer * outbuf,
|
|
|
|
gchar * encode_string)
|
|
|
|
{
|
|
|
|
gchar *timestamp;
|
|
|
|
gchar *value;
|
|
|
|
gchar *buffer_count;
|
|
|
|
gchar *framerate;
|
|
|
|
gchar *element_name;
|
|
|
|
gchar *name;
|
|
|
|
gchar *extra_data_value = NULL;
|
|
|
|
int size_string;
|
|
|
|
|
2020-07-09 16:49:51 +00:00
|
|
|
GstQROverlay *filter = GST_QR_OVERLAY (base);
|
2020-07-09 16:37:55 +00:00
|
|
|
GST_DEBUG_OBJECT (filter, "Build string will be encoded");
|
|
|
|
/* Convert timestamp to string */
|
|
|
|
if (!(timestamp = malloc (35 * sizeof (char *))))
|
|
|
|
GST_ERROR_OBJECT (filter, "can't alloc memory to timestamp");
|
|
|
|
if (!(value = malloc (20 * sizeof (char *))))
|
|
|
|
GST_ERROR_OBJECT (filter, "can't alloc memory to timestamp value");
|
|
|
|
sprintf (value, "%llu",
|
|
|
|
(long long unsigned int) GST_BUFFER_TIMESTAMP (outbuf));
|
|
|
|
strcpy (timestamp, "\"timestamp\":");
|
|
|
|
timestamp = strcat (timestamp, value);
|
|
|
|
timestamp = strcat (timestamp, ",");
|
|
|
|
strcpy (encode_string, "{");
|
|
|
|
GST_LOG_OBJECT (filter, "Build timestamp string");
|
|
|
|
encode_string = strcat (encode_string, timestamp);
|
|
|
|
g_free (value);
|
|
|
|
g_free (timestamp);
|
|
|
|
/* Convert frame number to string */
|
|
|
|
if (!(buffer_count = malloc (23 * sizeof (char *))))
|
|
|
|
GST_ERROR_OBJECT (filter, "can't alloc memory to buffer count");
|
|
|
|
if (!(value = malloc (7 * sizeof (char *))))
|
|
|
|
GST_ERROR_OBJECT (filter, "can't alloc memory to buffer counr value");
|
|
|
|
strcpy (buffer_count, "\"buffercount\":");
|
|
|
|
sprintf (value, "%d", filter->frame_number);
|
|
|
|
buffer_count = strcat (buffer_count, value);
|
|
|
|
buffer_count = strcat (buffer_count, ",");
|
|
|
|
GST_LOG_OBJECT (filter, "Build buffer count string");
|
|
|
|
encode_string = strcat (encode_string, buffer_count);
|
|
|
|
g_free (value);
|
|
|
|
g_free (buffer_count);
|
|
|
|
/* Convert framerate to string */
|
|
|
|
size_string = strlen (filter->framerate_string);
|
|
|
|
if (!(framerate = malloc ((18 + size_string) * sizeof (char *))))
|
|
|
|
GST_ERROR_OBJECT (filter, "can't alloc memory to framerate");
|
|
|
|
strcpy (framerate, "\"framerate\":\"");
|
|
|
|
framerate = strcat (framerate, filter->framerate_string);
|
|
|
|
framerate = strcat (framerate, "\",");
|
|
|
|
GST_LOG_OBJECT (filter, "Build framerate string");
|
|
|
|
encode_string = strcat (encode_string, framerate);
|
|
|
|
g_free (framerate);
|
|
|
|
/* element name string */
|
|
|
|
name = GST_ELEMENT_NAME (base);
|
|
|
|
size_string = strlen (name);
|
|
|
|
if (!(element_name = malloc ((14 + size_string) * sizeof (char *))))
|
|
|
|
GST_ERROR_OBJECT (filter, "can't alloc memory to element name");
|
|
|
|
strcpy (element_name, "\"name\":\"");
|
|
|
|
element_name = strcat (element_name, name);
|
|
|
|
element_name = strcat (element_name, "\",");
|
|
|
|
GST_LOG_OBJECT (filter, "Build element name string");
|
|
|
|
encode_string = strcat (encode_string, element_name);
|
|
|
|
g_free (element_name);
|
|
|
|
if (filter->extra_data_enabled &&
|
|
|
|
(filter->frame_number == 1
|
|
|
|
|| filter->frame_number % filter->extra_data_interval_buffers == 1
|
|
|
|
|| (filter->span_frame > 0
|
|
|
|
&& filter->span_frame < filter->extra_data_span_buffers))) {
|
|
|
|
extra_data_value = parse_data_array (filter, extra_data_value);
|
|
|
|
GST_LOG_OBJECT (filter, "Build extra data string");
|
|
|
|
encode_string = strcat (encode_string, "\"");
|
|
|
|
encode_string = strcat (encode_string, filter->extra_data_name);
|
|
|
|
encode_string = strcat (encode_string, "\":\"");
|
|
|
|
encode_string = strcat (encode_string, extra_data_value);
|
|
|
|
encode_string = strcat (encode_string, "\",");
|
|
|
|
g_free (extra_data_value);
|
|
|
|
filter->span_frame++;
|
|
|
|
if (filter->span_frame == filter->extra_data_span_buffers) {
|
|
|
|
filter->array_counter++;
|
|
|
|
filter->span_frame = 0;
|
|
|
|
if (filter->array_counter >= filter->array_size)
|
|
|
|
filter->array_counter = 0;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
encode_string = strcat (encode_string, "}");
|
|
|
|
GST_LOG_OBJECT (filter, "String built");
|
|
|
|
return encode_string;
|
|
|
|
}
|
|
|
|
|
2020-07-09 16:51:23 +00:00
|
|
|
static void
|
2020-07-09 16:49:51 +00:00
|
|
|
overlay_qr_in_frame (GstQROverlay * filter, QRcode * qrcode, GstBuffer * outbuf)
|
2020-07-09 16:37:55 +00:00
|
|
|
{
|
|
|
|
GstMapInfo current_info;
|
|
|
|
guchar *source_data;
|
|
|
|
register int32_t k, y, x, yy, realwidth, y_position, x_position, line = 0;
|
|
|
|
int img_res, quarter_img_res;
|
|
|
|
|
|
|
|
GST_DEBUG_OBJECT (filter, "Overlay QRcode in frame");
|
|
|
|
gst_buffer_map (outbuf, ¤t_info, GST_MAP_WRITE);
|
|
|
|
realwidth = (qrcode->width + 4 * 2) * filter->qrcode_size;
|
|
|
|
/* White bg */
|
|
|
|
x_position = (int) (filter->width - realwidth) * (filter->x_percent / 100);
|
|
|
|
y_position = (int) (filter->height - realwidth) * (filter->y_percent / 100);
|
|
|
|
x_position = GST_ROUND_DOWN_2 (x_position);
|
|
|
|
y_position = GST_ROUND_DOWN_4 (y_position);
|
|
|
|
GST_LOG_OBJECT (filter, "Add white background in frame");
|
|
|
|
img_res = filter->width * filter->height;
|
|
|
|
quarter_img_res = img_res / 4;
|
|
|
|
for (y = y_position; y < realwidth + y_position; y++) {
|
|
|
|
memset (current_info.data + (filter->width * y + x_position), 0xff,
|
|
|
|
realwidth);
|
|
|
|
if (y % 4 == 0) {
|
|
|
|
memset (current_info.data + img_res + y / 4 * filter->width +
|
|
|
|
x_position / 2, 128, realwidth / 2);
|
|
|
|
memset (current_info.data + img_res + y / 4 * filter->width +
|
|
|
|
x_position / 2 + quarter_img_res, 128, realwidth / 2);
|
|
|
|
if (y < (realwidth + y_position) - 4) {
|
|
|
|
memset (current_info.data + img_res + y / 4 * filter->width +
|
|
|
|
x_position / 2 + (filter->width / 2), 128, realwidth / 2);
|
|
|
|
memset (current_info.data + img_res + y / 4 * filter->width +
|
|
|
|
x_position / 2 + quarter_img_res + (filter->width / 2), 128,
|
|
|
|
realwidth / 2);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
GST_LOG_OBJECT (filter, "Add data in frame");
|
|
|
|
/* data */
|
|
|
|
line += 4 * filter->qrcode_size * filter->width;
|
|
|
|
source_data = qrcode->data;
|
|
|
|
y = (int) (filter->height - realwidth) / 2;
|
|
|
|
for (y = 0; y < qrcode->width; y++) {
|
|
|
|
for (x = 0; x < (qrcode->width); x++) {
|
|
|
|
for (yy = 0; yy < filter->qrcode_size; yy++) {
|
|
|
|
k = ((((line + (4 * filter->qrcode_size))) + filter->width * yy +
|
|
|
|
x * filter->qrcode_size) + x_position) +
|
|
|
|
(y_position * filter->width);
|
|
|
|
if (*source_data & 1) {
|
|
|
|
memset (current_info.data + k, 0, filter->qrcode_size);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
source_data++;
|
|
|
|
}
|
|
|
|
line += (filter->width * filter->qrcode_size);
|
|
|
|
}
|
|
|
|
QRcode_free (qrcode);
|
|
|
|
gst_buffer_unmap (outbuf, ¤t_info);
|
|
|
|
}
|
|
|
|
|
|
|
|
/* GstBaseTransform vmethod implementations */
|
|
|
|
/* this function does the actual processing
|
|
|
|
*/
|
|
|
|
static GstFlowReturn
|
2020-07-09 16:49:51 +00:00
|
|
|
gst_qr_overlay_transform_ip (GstBaseTransform * base, GstBuffer * outbuf)
|
2020-07-09 16:37:55 +00:00
|
|
|
{
|
2020-07-09 16:49:51 +00:00
|
|
|
GstQROverlay *filter = GST_QR_OVERLAY (base);
|
2020-07-09 16:37:55 +00:00
|
|
|
QRcode *qrcode;
|
|
|
|
gchar *encode_string;
|
|
|
|
|
|
|
|
if (GST_CLOCK_TIME_IS_VALID (GST_BUFFER_TIMESTAMP (outbuf)))
|
|
|
|
gst_object_sync_values (GST_OBJECT (filter), GST_BUFFER_TIMESTAMP (outbuf));
|
|
|
|
if (!(encode_string = malloc (150 * sizeof (char *))))
|
|
|
|
GST_ERROR_OBJECT (filter, "can't alloc memory to timestamp");
|
|
|
|
encode_string = build_string (base, outbuf, encode_string);
|
|
|
|
GST_INFO_OBJECT (filter, "String will be encoded : %s", encode_string);
|
|
|
|
qrcode =
|
|
|
|
QRcode_encodeString ((const char *) encode_string, 0,
|
|
|
|
filter->qrcode_quality, QR_MODE_8, 0);
|
|
|
|
g_free (encode_string);
|
|
|
|
if (qrcode) {
|
|
|
|
GST_DEBUG_OBJECT (filter, "String encoded");
|
|
|
|
overlay_qr_in_frame (filter, qrcode, outbuf);
|
|
|
|
filter->frame_number++;
|
|
|
|
} else
|
|
|
|
GST_WARNING_OBJECT (filter, "Could not encode the string");
|
|
|
|
return GST_FLOW_OK;
|
|
|
|
}
|
|
|
|
|
|
|
|
static gboolean
|
|
|
|
qroverlay_init (GstPlugin * qroverlay)
|
|
|
|
{
|
2020-07-09 16:49:51 +00:00
|
|
|
GST_DEBUG_CATEGORY_INIT (gst_qr_overlay_debug, "qroverlay", 0,
|
2020-07-09 16:37:55 +00:00
|
|
|
"Qrcode overlay element");
|
|
|
|
|
|
|
|
return gst_element_register (qroverlay, "qroverlay", GST_RANK_NONE,
|
2020-07-09 16:49:51 +00:00
|
|
|
GST_TYPE_QR_OVERLAY);
|
2020-07-09 16:37:55 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
|
|
|
|
GST_VERSION_MINOR,
|
|
|
|
qroverlay,
|
|
|
|
"libqrencode qroverlay plugin",
|
|
|
|
qroverlay_init, VERSION, "LGPL", PACKAGE_NAME, GST_PACKAGE_ORIGIN)
|