2020-07-12 03:35:55 +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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* 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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#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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PROP_CASE_SENSITIVE,
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2020-07-12 03:35:55 +00:00
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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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2020-11-20 14:28:25 +00:00
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GstElement *overlaycomposition;
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GstVideoInfo info;
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gboolean valid;
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2022-12-30 15:30:38 +00:00
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gboolean case_sensitive;
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2020-11-20 14:28:25 +00:00
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GstPad *sinkpad, *srcpad;
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2020-11-21 22:00:02 +00:00
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GstVideoOverlayComposition *prev_overlay;
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2020-07-12 03:35:55 +00:00
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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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2020-11-20 14:28:25 +00:00
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#define OVERLAY_COMPOSITION_CAPS GST_VIDEO_CAPS_MAKE (GST_VIDEO_OVERLAY_COMPOSITION_BLEND_FORMATS)
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#define ALL_CAPS OVERLAY_COMPOSITION_CAPS ";" \
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2023-09-27 11:55:33 +00:00
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GST_VIDEO_CAPS_MAKE_WITH_FEATURES ("ANY", GST_VIDEO_FORMATS_ANY)
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2020-11-20 14:28:25 +00:00
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2020-07-12 03:35:55 +00:00
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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 (ALL_CAPS)
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2020-07-12 03:35:55 +00:00
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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 (ALL_CAPS)
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2020-07-12 03:35:55 +00:00
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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 DEFAULT_PROP_CASE_SENSITIVE FALSE
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2020-07-12 03:35:55 +00:00
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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_BIN);
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2020-07-12 03:35:55 +00:00
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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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2020-11-20 14:28:25 +00:00
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static void
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gst_base_qr_overlay_caps_changed_cb (GstBaseQROverlay * self, GstCaps * caps,
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gint window_width, gint window_height, GstElement * overlay)
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{
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GstBaseQROverlayPrivate *priv = PRIV (self);
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2024-07-24 20:21:41 +00:00
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GST_DEBUG_OBJECT (self, "%" GST_PTR_FORMAT, caps);
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2020-11-20 14:28:25 +00:00
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if (gst_video_info_from_caps (&priv->info, caps))
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priv->valid = TRUE;
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else
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priv->valid = FALSE;
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}
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static GstVideoOverlayComposition *
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draw_overlay (GstBaseQROverlay * self, QRcode * qrcode)
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{
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guint8 *qr_data, *pixels;
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gint stride, pstride, y, x, yy, square_size;
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gsize offset, line_offset;
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GstVideoInfo info;
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GstVideoOverlayRectangle *rect;
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GstVideoOverlayComposition *comp;
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GstBuffer *buf;
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GstBaseQROverlayPrivate *priv = PRIV (self);
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gst_video_info_init (&info);
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square_size = (qrcode->width + 4 * 2) * priv->qrcode_size;
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gst_video_info_set_format (&info, GST_VIDEO_FORMAT_ARGB, square_size,
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square_size);
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pixels = g_malloc ((size_t) info.size);
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stride = info.stride[0];
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pstride = info.finfo->pixel_stride[0];
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/* White background */
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for (y = 0; y < info.height; y++)
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memset (&pixels[y * stride], 0xff, stride);
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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_offset = 4 * priv->qrcode_size * stride;
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qr_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 * pstride; yy += pstride) {
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if (!(*qr_data & 1))
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continue;
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offset =
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(((line_offset + (stride * (yy / pstride))) +
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x * priv->qrcode_size * pstride)) +
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(priv->qrcode_size * pstride) + (4 * priv->qrcode_size * pstride);
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for (gint i = 0; i < priv->qrcode_size * pstride; i += pstride) {
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pixels[offset + i] = 0x00;
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pixels[offset + i + 1] = 0x00;
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pixels[offset + i + 2] = 0x00;
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}
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}
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qr_data++;
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}
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line_offset += (stride * priv->qrcode_size);
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}
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buf = gst_buffer_new_wrapped (pixels, info.size);
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gst_buffer_add_video_meta (buf, GST_VIDEO_FRAME_FLAG_NONE,
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GST_VIDEO_OVERLAY_COMPOSITION_FORMAT_RGB, info.width, info.height);
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x = (int) (priv->info.width - square_size) * (priv->x_percent / 100);
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x = GST_ROUND_DOWN_2 (x);
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y = (int) (priv->info.height - square_size) * (priv->y_percent / 100);
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y = GST_ROUND_DOWN_4 (y);
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2024-07-24 20:21:41 +00:00
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GST_DEBUG_OBJECT (self, "draw overlay at (%d,%d) size: %dx%d", x, y,
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info.width, info.height);
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2020-11-20 14:28:25 +00:00
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rect = gst_video_overlay_rectangle_new_raw (buf, x, y,
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info.width, info.height, GST_VIDEO_OVERLAY_FORMAT_FLAG_NONE);
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comp = gst_video_overlay_composition_new (rect);
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gst_video_overlay_rectangle_unref (rect);
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return comp;
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}
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static GstVideoOverlayComposition *
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gst_base_qr_overlay_draw_cb (GstBaseQROverlay * self, GstSample * sample,
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GstElement * _)
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{
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GstBaseQROverlayPrivate *priv = PRIV (self);
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QRcode *qrcode;
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gchar *content;
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gboolean reuse_previous = FALSE;
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2020-11-20 14:28:25 +00:00
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GstVideoOverlayComposition *overlay = NULL;
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GstBuffer *buffer = gst_sample_get_buffer (sample);
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GstSegment *segment = gst_sample_get_segment (sample);
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GstClockTime rtime = gst_segment_to_running_time (segment, GST_FORMAT_TIME,
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GST_BUFFER_PTS (buffer));
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if (!priv->valid) {
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GST_ERROR_OBJECT (self, "Trying to draw before negotiation?");
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return NULL;
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}
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if (GST_CLOCK_TIME_IS_VALID (rtime))
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gst_object_sync_values (GST_OBJECT (self), rtime);
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content =
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GST_BASE_QR_OVERLAY_GET_CLASS (self)->get_content (GST_BASE_QR_OVERLAY
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2020-11-21 22:00:02 +00:00
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(self), buffer, &priv->info, &reuse_previous);
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if (reuse_previous && priv->prev_overlay) {
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overlay = gst_video_overlay_composition_ref (priv->prev_overlay);
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} else if (content) {
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GST_INFO_OBJECT (self, "String will be encoded : %s", content);
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qrcode =
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QRcode_encodeString (content, 0, priv->qrcode_quality, QR_MODE_8,
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priv->case_sensitive);
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2020-11-21 22:00:02 +00:00
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if (qrcode) {
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GST_DEBUG_OBJECT (self, "String encoded");
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overlay = draw_overlay (GST_BASE_QR_OVERLAY (self), qrcode);
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gst_mini_object_replace (((GstMiniObject **) & priv->prev_overlay),
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(GstMiniObject *) overlay);
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} else {
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GST_WARNING_OBJECT (self, "Could not encode content: %s", content);
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}
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2020-11-20 14:28:25 +00:00
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}
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g_free (content);
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return overlay;
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}
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2020-07-12 03:35:55 +00:00
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/* GObject vmethod implementations */
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2020-11-21 22:00:02 +00:00
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static void
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gst_base_qr_overlay_dispose (GObject * object)
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{
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GstBaseQROverlayPrivate *priv = PRIV (object);
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gst_mini_object_replace (((GstMiniObject **) & priv->prev_overlay), NULL);
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}
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2020-07-12 03:35:55 +00:00
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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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2020-11-21 22:00:02 +00:00
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gobject_class->dispose = gst_base_qr_overlay_dispose;
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2020-07-12 03:35:55 +00:00
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2020-11-20 14:28:25 +00:00
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GST_DEBUG_CATEGORY_INIT (gst_base_qr_overlay_debug, "qroverlay", 0,
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"Qrcode overlay base class");
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2020-07-12 03:35:55 +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, 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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2022-12-30 15:30:38 +00:00
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/**
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* GstBaseQROverlay::case-sensitive:
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*
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* Strings to encode are case sensitive (e.g. passwords or SSIDs).
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*
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* Since: 1.22
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*/
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g_object_class_install_property (gobject_class, PROP_CASE_SENSITIVE,
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g_param_spec_boolean ("case-sensitive", "Case Sensitive",
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"Strings to encode are case sensitive (e.g. passwords or SSIDs)",
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DEFAULT_PROP_CASE_SENSITIVE,
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G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
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2020-07-12 03:35:55 +00:00
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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,
|
|
|
|
gst_static_pad_template_get (&sink_template));
|
|
|
|
|
|
|
|
gst_type_mark_as_plugin_api (GST_TYPE_QRCODE_QUALITY, 0);
|
|
|
|
gst_type_mark_as_plugin_api (GST_TYPE_QRCODE_QUALITY, 0);
|
|
|
|
}
|
|
|
|
|
|
|
|
/* initialize the new element
|
|
|
|
* initialize instance structure
|
|
|
|
*/
|
|
|
|
static void
|
2020-11-20 14:28:25 +00:00
|
|
|
gst_base_qr_overlay_init (GstBaseQROverlay * self)
|
2020-07-12 03:35:55 +00:00
|
|
|
{
|
2020-11-20 14:28:25 +00:00
|
|
|
GstBaseQROverlayPrivate *priv = PRIV (self);
|
2020-07-12 03:35:55 +00:00
|
|
|
|
|
|
|
priv->x_percent = 50.0;
|
|
|
|
priv->y_percent = 50.0;
|
|
|
|
priv->qrcode_quality = DEFAULT_PROP_QUALITY;
|
2022-12-30 15:30:38 +00:00
|
|
|
priv->case_sensitive = DEFAULT_PROP_CASE_SENSITIVE;
|
2020-07-12 03:35:55 +00:00
|
|
|
priv->span_frame = 0;
|
|
|
|
priv->qrcode_size = DEFAULT_PROP_PIXEL_SIZE;
|
2020-11-20 14:28:25 +00:00
|
|
|
priv->overlaycomposition =
|
|
|
|
gst_element_factory_make ("overlaycomposition", NULL);
|
|
|
|
gst_video_info_init (&priv->info);
|
|
|
|
|
|
|
|
if (priv->overlaycomposition) {
|
|
|
|
GstPadTemplate *sink_tmpl = gst_static_pad_template_get (&sink_template);
|
|
|
|
GstPadTemplate *src_tmpl = gst_static_pad_template_get (&src_template);
|
|
|
|
|
|
|
|
gst_bin_add (GST_BIN (self), priv->overlaycomposition);
|
|
|
|
|
|
|
|
gst_element_add_pad (GST_ELEMENT_CAST (self),
|
|
|
|
gst_ghost_pad_new_from_template ("sink",
|
|
|
|
priv->overlaycomposition->sinkpads->data, sink_tmpl));
|
|
|
|
gst_element_add_pad (GST_ELEMENT_CAST (self),
|
|
|
|
gst_ghost_pad_new_from_template ("src",
|
|
|
|
priv->overlaycomposition->srcpads->data, src_tmpl));
|
|
|
|
gst_object_unref (sink_tmpl);
|
|
|
|
gst_object_unref (src_tmpl);
|
|
|
|
|
|
|
|
g_signal_connect_swapped (priv->overlaycomposition, "draw",
|
|
|
|
G_CALLBACK (gst_base_qr_overlay_draw_cb), self);
|
|
|
|
g_signal_connect_swapped (priv->overlaycomposition, "caps-changed",
|
|
|
|
G_CALLBACK (gst_base_qr_overlay_caps_changed_cb), self);
|
|
|
|
}
|
2020-07-12 03:35:55 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
|
|
gst_base_qr_overlay_set_property (GObject * object, guint prop_id,
|
|
|
|
const GValue * value, GParamSpec * pspec)
|
|
|
|
{
|
|
|
|
GstBaseQROverlayPrivate *priv = PRIV (object);
|
|
|
|
|
|
|
|
switch (prop_id) {
|
|
|
|
case PROP_X_AXIS:
|
|
|
|
priv->x_percent = g_value_get_float (value);
|
|
|
|
break;
|
|
|
|
case PROP_Y_AXIS:
|
|
|
|
priv->y_percent = g_value_get_float (value);
|
|
|
|
break;
|
|
|
|
case PROP_PIXEL_SIZE:
|
|
|
|
priv->qrcode_size = g_value_get_float (value);
|
|
|
|
break;
|
|
|
|
case PROP_QRCODE_ERROR_CORRECTION:
|
|
|
|
priv->qrcode_quality = g_value_get_enum (value);
|
|
|
|
break;
|
2022-12-30 15:30:38 +00:00
|
|
|
case PROP_CASE_SENSITIVE:
|
|
|
|
priv->case_sensitive = g_value_get_boolean (value);
|
|
|
|
break;
|
2020-07-12 03:35:55 +00:00
|
|
|
default:
|
|
|
|
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
|
|
gst_base_qr_overlay_get_property (GObject * object, guint prop_id,
|
|
|
|
GValue * value, GParamSpec * pspec)
|
|
|
|
{
|
|
|
|
GstBaseQROverlayPrivate *priv = PRIV (object);
|
|
|
|
|
|
|
|
switch (prop_id) {
|
|
|
|
case PROP_X_AXIS:
|
|
|
|
g_value_set_float (value, priv->x_percent);
|
|
|
|
break;
|
|
|
|
case PROP_Y_AXIS:
|
|
|
|
g_value_set_float (value, priv->y_percent);
|
|
|
|
break;
|
|
|
|
case PROP_PIXEL_SIZE:
|
|
|
|
g_value_set_float (value, priv->qrcode_size);
|
|
|
|
break;
|
|
|
|
case PROP_QRCODE_ERROR_CORRECTION:
|
|
|
|
g_value_set_enum (value, priv->qrcode_quality);
|
|
|
|
break;
|
2022-12-30 15:30:38 +00:00
|
|
|
case PROP_CASE_SENSITIVE:
|
|
|
|
g_value_set_boolean (value, priv->case_sensitive);
|
|
|
|
break;
|
2020-07-12 03:35:55 +00:00
|
|
|
default:
|
|
|
|
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
}
|