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It was never reset so it was always TRUE once the data was changed! Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/2299>
200 lines
5.3 KiB
C
200 lines
5.3 KiB
C
/*
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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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* SECTION:element-qroverlay
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*
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* Element to set random data on a qroverlay.
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*
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* ## Example launch line
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*
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* ``` bash
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* gst-launch -v -m videotestsrc ! qroverlay ! fakesink silent=TRUE
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* ```
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* Since 1.22 the `qroverlay` element also supports a #GstCustomMeta called
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* `GstQROverlayMeta` which allows upstream elements to set the data to be
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* rendered on the buffers that flow through it. This custom meta
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* #GstStructure has the following fields:
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*
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* * #gchar* `data` (**mandatory**): The data to use to render the qrcode.
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* * #gboolean `keep_data` (**mandatory**): Set to %TRUE if the data from that
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* metadata should be used as #qroverlay:data
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*
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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 "gstqroverlayelements.h"
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#include "gstqroverlay.h"
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enum
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{
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PROP_0,
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PROP_DATA,
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};
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struct _GstQROverlay
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{
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GstBaseQROverlay parent;
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gchar *data;
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gboolean data_changed;
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};
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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_QR_OVERLAY);
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GST_ELEMENT_REGISTER_DEFINE_WITH_CODE (qroverlay, "qroverlay", GST_RANK_NONE,
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GST_TYPE_QR_OVERLAY, qroverlay_element_init (plugin));
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static gchar *
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get_qrcode_content (GstBaseQROverlay * base, GstBuffer * buf,
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GstVideoInfo * info, gboolean * reuse_prev)
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{
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gchar *content;
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GstQROverlay *self = GST_QR_OVERLAY (base);
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GstCustomMeta *meta = gst_buffer_get_custom_meta (buf, "GstQROverlayMeta");
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if (meta) {
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gchar *data;
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GstStructure *structure =
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gst_custom_meta_get_structure ((GstCustomMeta *) meta);
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if (gst_structure_get (structure, "data", G_TYPE_STRING, &data, NULL)) {
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gboolean keep_data;
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GST_OBJECT_LOCK (self);
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self->data_changed = TRUE;
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if (gst_structure_get_boolean (structure, "keep_data", &keep_data)
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&& keep_data) {
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g_free (self->data);
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self->data = g_strdup (self->data);
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}
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GST_OBJECT_UNLOCK (self);
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*reuse_prev = FALSE;
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return data;
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}
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GST_WARNING_OBJECT (self,
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"Got a GstQROverlayMeta without a 'data' field in its struct");
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}
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GST_OBJECT_LOCK (self);
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content = g_strdup (self->data);
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*reuse_prev = self->data_changed;
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self->data_changed = FALSE;
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GST_OBJECT_UNLOCK (self);
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return content;
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}
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static void
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gst_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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GstQROverlay *self = GST_QR_OVERLAY (object);
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switch (prop_id) {
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case PROP_DATA:
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GST_OBJECT_LOCK (self);
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self->data = g_value_dup_string (value);
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self->data_changed = TRUE;
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GST_OBJECT_UNLOCK (self);
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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_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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GstQROverlay *self = GST_QR_OVERLAY (object);
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switch (prop_id) {
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case PROP_DATA:
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g_value_set_string (value, self->data);
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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_qr_overlay_class_init (GstQROverlayClass * klass)
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{
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GObjectClass *gobject_class;
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GstElementClass *gstelement_class;
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static const gchar *tags[] = { NULL };
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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_qr_overlay_set_property;
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gobject_class->get_property = gst_qr_overlay_get_property;
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gst_element_class_set_details_simple (gstelement_class,
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"qroverlay",
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"Qrcode overlay containing random data",
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"Overlay Qrcodes over each buffer with data passed in",
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"Thibault Saunier <tsaunier@igalia.com>");
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gst_meta_register_custom ("GstQROverlayMeta", tags, NULL, NULL, NULL);
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g_object_class_install_property (gobject_class,
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PROP_DATA, g_param_spec_string ("data",
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"Data",
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"Data to write in the QRCode to be overlaid",
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NULL,
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G_PARAM_READWRITE | GST_PARAM_MUTABLE_PLAYING |
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GST_PARAM_CONTROLLABLE));
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GST_BASE_QR_OVERLAY_CLASS (klass)->get_content =
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GST_DEBUG_FUNCPTR (get_qrcode_content);
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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_qr_overlay_init (GstQROverlay * filter)
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{
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}
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