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https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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Part-of: <https://gitlab.freedesktop.org/gstreamer/gst-plugins-bad/-/merge_requests/1730>
296 lines
9.4 KiB
C
Executable file
296 lines
9.4 KiB
C
Executable file
/*
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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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*
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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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* 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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* gst-launch -v -m videotestsrc ! qroverlay ! fakesink silent=TRUE
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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 "gstqroverlay.h"
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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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static gchar *get_qrcode_content (GstBaseQROverlay * filter,
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GstVideoFrame * frame);
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enum
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{
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PROP_0,
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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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};
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typedef struct _GstQROverlayPrivate GstQROverlayPrivate;
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struct _GstQROverlayPrivate
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{
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guint32 frame_number;
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guint array_counter;
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guint array_size;
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guint span_frame;
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guint64 extra_data_interval_buffers;
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guint64 extra_data_span_buffers;
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gchar *extra_data_name;
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gchar *extra_data_str;
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gchar **extra_data_array;
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gfloat x_percent;
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gfloat y_percent;
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gboolean silent;
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gboolean extra_data_enabled;
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};
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#define PRIV(s) gst_qr_overlay_get_instance_private (GST_QR_OVERLAY (s))
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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_qr_overlay_parent_class parent_class
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G_DEFINE_TYPE_WITH_PRIVATE (GstQROverlay, gst_qr_overlay,
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GST_TYPE_BASE_QR_OVERLAY);
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static void gst_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_qr_overlay_get_property (GObject * object, guint prop_id,
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GValue * value, GParamSpec * pspec);
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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_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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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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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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"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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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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"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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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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"Extra data name",
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"Json key name for extra append data", NULL, G_PARAM_READWRITE));
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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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"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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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_type_mark_as_plugin_api (GST_TYPE_BASE_QR_OVERLAY, 0);
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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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GstQROverlayPrivate *priv = PRIV (filter);
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priv->frame_number = 1;
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priv->x_percent = 50.0;
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priv->y_percent = 50.0;
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priv->array_counter = 0;
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priv->array_size = 0;
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priv->extra_data_interval_buffers = 60;
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priv->extra_data_span_buffers = 1;
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priv->span_frame = 0;
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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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GstQROverlayPrivate *priv = PRIV (object);
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switch (prop_id) {
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case PROP_DATA_INTERVAL_BUFFERS:
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priv->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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priv->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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priv->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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{
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g_clear_pointer (&priv->extra_data_str, g_free);
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g_clear_pointer (&priv->extra_data_array, g_strfreev);
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priv->extra_data_str = g_value_dup_string (value);
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if (priv->extra_data_str) {
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priv->extra_data_array = g_strsplit (priv->extra_data_str, ",", -1);
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priv->array_size = g_strv_length (priv->extra_data_array);
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}
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break;
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}
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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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GstQROverlayPrivate *priv = PRIV (object);
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switch (prop_id) {
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case PROP_DATA_INTERVAL_BUFFERS:
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g_value_set_int64 (value, priv->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, priv->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, priv->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, priv->extra_data_str);
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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 gchar *
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get_qrcode_content (GstBaseQROverlay * filter, GstVideoFrame * frame)
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{
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GstQROverlayPrivate *priv = PRIV (filter);
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GstBuffer *buf = frame->buffer;
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GString *res = g_string_new (NULL);
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JsonGenerator *jgen;
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gchar *framerate_string =
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g_strdup_printf ("%d/%d", frame->info.fps_n, frame->info.fps_d);
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JsonObject *jobj = json_object_new ();
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JsonNode *root = json_node_new (JSON_NODE_OBJECT);
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json_object_set_int_member (jobj, "TIMESTAMP",
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(gint64) GST_BUFFER_TIMESTAMP (buf));
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json_object_set_int_member (jobj, "BUFFERCOUNT", (gint64) priv->frame_number);
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json_object_set_string_member (jobj, "FRAMERATE", framerate_string);
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json_object_set_string_member (jobj, "NAME", GST_ELEMENT_NAME (filter));
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g_free (framerate_string);
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if (priv->extra_data_array && priv->extra_data_name &&
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(priv->frame_number == 1
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|| priv->frame_number % priv->extra_data_interval_buffers == 1
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|| (priv->span_frame > 0
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&& priv->span_frame < priv->extra_data_span_buffers))) {
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json_object_set_string_member (jobj, priv->extra_data_name,
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priv->extra_data_array[priv->array_counter]);
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priv->span_frame++;
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if (priv->span_frame == priv->extra_data_span_buffers) {
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priv->array_counter++;
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priv->span_frame = 0;
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if (priv->array_counter >= priv->array_size)
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priv->array_counter = 0;
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}
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}
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jgen = json_generator_new ();
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json_node_set_object (root, jobj);
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json_generator_set_root (jgen, root);
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res = json_generator_to_gstring (jgen, res);
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g_object_unref (jgen);
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priv->frame_number++;
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return g_strdup (g_string_free (res, FALSE));
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}
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static gboolean
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qroverlay_init (GstPlugin * qroverlay)
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{
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GST_DEBUG_CATEGORY_INIT (gst_qr_overlay_debug, "qroverlay", 0,
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"Qrcode overlay element");
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return gst_element_register (qroverlay, "qroverlay", GST_RANK_NONE,
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GST_TYPE_QR_OVERLAY);
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}
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GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
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GST_VERSION_MINOR,
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qroverlay,
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"libqrencode qroverlay plugin",
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qroverlay_init, VERSION, "LGPL", PACKAGE_NAME, GST_PACKAGE_ORIGIN)
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