qroverlay: Import from gst-qroverlay

Part-of: <https://gitlab.freedesktop.org/gstreamer/gst-plugins-bad/-/merge_requests/1730>

ext/meson.build

@@ -42,6 +42,7 @@ subdir('openjpeg')
 subdir('openmpt')
 subdir('openni2')
 subdir('opus')
+subdir('qroverlay')
 subdir('resindvd')
 subdir('rsvg')
 subdir('rtmp')

ext/qroverlay/gstqroverlay.c

@@ -0,0 +1,576 @@
+/*
+ * GStreamer
+ * Copyright (C) 2006 Stefan Kost <ensonic@users.sf.net>
+ * Copyright (C) 2015 anthony <<user@hostname.org>>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library; if not, write to the
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ */
+
+/**
+ * SECTION:element-qroverlay
+ *
+ * This element will build a Json string that contain a desciption of the buffer and will convert Json string to a Qrcode
+ * The Qrcode contain a timestamp, a buffer number, a framerate and a extra-data that is custom
+ * Each frame will have a Qrcode overlay in video
+ * Some properties are available to set the postion and to define the size of it
+ * You can add custom data with the properties extra-data-name and extra-data-array.
+ * You can define quality of the Qrcode with qrcode-error-correction
+ * Also you can define interval and span of the extra-data-name and extra-data-array
+ * The 
+ * <refsect2>
+ * <title>Example launch line</title>
+ * |[
+ * gst-launch -v -m videotestsrc ! qroverlay ! fakesink silent=TRUE
+ * ]|
+ * </refsect2>
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <gst/gst.h>
+#include <gst/base/gstbasetransform.h>
+#include <gst/controller/controller.h>
+
+#include <qrencode.h>
+#include <string.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+#include "gstqroverlay.h"
+
+GST_DEBUG_CATEGORY_STATIC (gst_qroverlay_debug);
+#define GST_CAT_DEFAULT gst_qroverlay_debug
+
+enum
+{
+  PROP_0,
+  PROP_X_AXIS,
+  PROP_Y_AXIS,
+  PROP_PIXEL_SIZE,
+  PROP_DATA_INTERVAL_BUFFERS,
+  PROP_DATA_SPAN_BUFFERS,
+  PROP_EXTRA_DATA_NAME,
+  PROP_EXTRA_DATA_ARRAY,
+  PROP_QRCODE_ERROR_CORRECTION,
+};
+
+
+static GstStaticPadTemplate sink_template = GST_STATIC_PAD_TEMPLATE ("sink",
+    GST_PAD_SINK,
+    GST_PAD_ALWAYS,
+    GST_STATIC_CAPS ("video/x-raw, "
+        "format = (string) { I420 }, "
+        "framerate = (fraction) [0, MAX], "
+        "width = (int) [ 16, MAX ], " "height = (int) [ 16, MAX ]")
+    );
+
+static GstStaticPadTemplate src_template = GST_STATIC_PAD_TEMPLATE ("src",
+    GST_PAD_SRC,
+    GST_PAD_ALWAYS,
+    GST_STATIC_CAPS ("video/x-raw, "
+        "format = (string) { I420 }, "
+        "framerate = (fraction) [0, MAX], "
+        "width = (int) [ 16, MAX ], " "height = (int) [ 16, MAX ]")
+    );
+
+#define DEFAULT_PROP_QUALITY    1
+
+#define GST_TYPE_QRCODE_QUALITY (gst_qrcode_quality_get_type())
+static GType
+gst_qrcode_quality_get_type (void)
+{
+  static GType qrcode_quality_type = 0;
+
+  static const GEnumValue qrcode_quality[] = {
+    {0, "Level L", "Approx 7%"},
+    {1, "Level M", "Approx 15%"},
+    {2, "Level Q", "Approx 25%"},
+    {3, "Level H", "Approx 30%"},
+    {0, NULL, NULL},
+  };
+
+  if (!qrcode_quality_type) {
+    qrcode_quality_type =
+        g_enum_register_static ("GstQrcodeOverlayCorrection", qrcode_quality);
+  }
+  return qrcode_quality_type;
+}
+
+#define gst_qroverlay_parent_class parent_class
+G_DEFINE_TYPE (Gstqroverlay, gst_qroverlay, GST_TYPE_BASE_TRANSFORM);
+
+static gboolean
+gst_qroverlay_set_caps (GstBaseTransform * trans, GstCaps * in, GstCaps * out);
+
+static void gst_qroverlay_set_property (GObject * object, guint prop_id,
+    const GValue * value, GParamSpec * pspec);
+static void gst_qroverlay_get_property (GObject * object, guint prop_id,
+    GValue * value, GParamSpec * pspec);
+
+static GstFlowReturn gst_qroverlay_transform_ip (GstBaseTransform * base,
+    GstBuffer * outbuf);
+
+/* GObject vmethod implementations */
+
+/* initialize the qroverlay's class */
+static void
+gst_qroverlay_class_init (GstqroverlayClass * klass)
+{
+  GObjectClass *gobject_class;
+  GstElementClass *gstelement_class;
+
+  gobject_class = (GObjectClass *) klass;
+  gstelement_class = (GstElementClass *) klass;
+  GstBaseTransformClass *trans_class = (GstBaseTransformClass *) klass;
+
+  gobject_class->set_property = gst_qroverlay_set_property;
+  gobject_class->get_property = gst_qroverlay_get_property;
+
+  g_object_class_install_property (gobject_class,
+      PROP_X_AXIS, g_param_spec_float ("x",
+          "X position (in percent of the width)",
+          "X position (in percent of the width)",
+          0.0, 100.0, 50.0, G_PARAM_READWRITE));
+
+  g_object_class_install_property (gobject_class,
+      PROP_Y_AXIS, g_param_spec_float ("y",
+          "Y position (in percent of the height)",
+          "Y position (in percent of the height)",
+          0.0, 100.0, 50.0, G_PARAM_READWRITE));
+
+  g_object_class_install_property (gobject_class,
+      PROP_PIXEL_SIZE, g_param_spec_float ("pixel-size",
+          "pixel-size", "Pixel size of each Qrcode pixel",
+          1, 100.0, 1, G_PARAM_READWRITE));
+
+  g_object_class_install_property (gobject_class,
+      PROP_DATA_INTERVAL_BUFFERS,
+      g_param_spec_int64 ("extra-data-interval-buffers",
+          "extra-data-interval-buffers",
+          "Extra data appened into the Qrcode at the first buffer of each interval",
+          0, G_MAXINT64, 60, G_PARAM_READWRITE));
+
+  g_object_class_install_property (gobject_class,
+      PROP_DATA_SPAN_BUFFERS, g_param_spec_int64 ("extra-data-span-buffers",
+          "extra-data-span-buffers",
+          "Numbers of consecutive buffers that the extra data will be inserted (counting the first buffer)",
+          0, G_MAXINT64, 1, G_PARAM_READWRITE));
+
+  g_object_class_install_property (gobject_class,
+      PROP_EXTRA_DATA_NAME, g_param_spec_string ("extra-data-name",
+          "Json key name for extra appened data",
+          "Json key name for extra appened data", NULL, G_PARAM_READWRITE));
+
+  g_object_class_install_property (gobject_class,
+      PROP_EXTRA_DATA_ARRAY, g_param_spec_string ("extra-data-array",
+          "List of comma separated values that the extra data value will be cycled from at each interval, exemple array structure : \"240,480,720,960,1200,1440,1680,1920\"",
+          "List of comma separated values that the extra data value will be cycled from at each interval, exemple array structure : \"240,480,720,960,1200,1440,1680,1920\"",
+          NULL, G_PARAM_READWRITE));
+
+  g_object_class_install_property (gobject_class, PROP_QRCODE_ERROR_CORRECTION,
+      g_param_spec_enum ("qrcode-error-correction", "qrcode-error-correction",
+          "qrcode-error-correction", GST_TYPE_QRCODE_QUALITY,
+          DEFAULT_PROP_QUALITY, G_PARAM_READWRITE | G_PARAM_STATIC_STRINGS));
+
+  gst_element_class_set_details_simple (gstelement_class,
+      "qroverlay",
+      "Qrcode overlay containing buffer information",
+      "Overlay Qrcodes over each buffer with buffer information and custom data",
+      "Anthony Violo <anthony.violo@ubicast.eu>");
+
+  gst_element_class_add_pad_template (gstelement_class,
+      gst_static_pad_template_get (&src_template));
+  gst_element_class_add_pad_template (gstelement_class,
+      gst_static_pad_template_get (&sink_template));
+
+  GST_BASE_TRANSFORM_CLASS (klass)->transform_ip =
+      GST_DEBUG_FUNCPTR (gst_qroverlay_transform_ip);
+  trans_class->set_caps = GST_DEBUG_FUNCPTR (gst_qroverlay_set_caps);
+}
+
+/* initialize the new element
+ * initialize instance structure
+ */
+static void
+gst_qroverlay_init (Gstqroverlay * filter)
+{
+  filter->frame_number = 1;
+  filter->x_percent = 50.0;
+  filter->y_percent = 50.0;
+  filter->qrcode_quality = DEFAULT_PROP_QUALITY;
+  filter->level = QR_ECLEVEL_M;
+  filter->extra_data_name = 0;
+  filter->extra_data_array = 0;
+  filter->extra_data_enabled = FALSE;
+  filter->array_counter = 0;
+  filter->array_size = 1;
+  filter->extra_data_interval_buffers = 60;
+  filter->extra_data_span_buffers = 1;
+  filter->span_frame = 0;
+  filter->qrcode_size = 1;
+}
+
+static void
+gst_qroverlay_set_property (GObject * object, guint prop_id,
+    const GValue * value, GParamSpec * pspec)
+{
+  Gstqroverlay *filter = GST_QROVERLAY (object);
+
+  switch (prop_id) {
+    case PROP_X_AXIS:
+      filter->x_percent = g_value_get_float (value);
+      break;
+    case PROP_Y_AXIS:
+      filter->y_percent = g_value_get_float (value);
+      break;
+    case PROP_PIXEL_SIZE:
+      filter->qrcode_size = g_value_get_float (value);
+      break;
+    case PROP_QRCODE_ERROR_CORRECTION:
+      filter->qrcode_quality = g_value_get_enum (value);
+      break;
+    case PROP_DATA_INTERVAL_BUFFERS:
+      filter->extra_data_interval_buffers = g_value_get_int64 (value);
+      break;
+    case PROP_DATA_SPAN_BUFFERS:
+      filter->extra_data_span_buffers = g_value_get_int64 (value);
+      break;
+    case PROP_EXTRA_DATA_NAME:
+      filter->extra_data_name = g_value_dup_string (value);
+      break;
+    case PROP_EXTRA_DATA_ARRAY:
+      filter->extra_data_array = g_value_dup_string (value);
+      break;
+    default:
+      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+      break;
+  }
+}
+
+static void
+gst_qroverlay_get_property (GObject * object, guint prop_id,
+    GValue * value, GParamSpec * pspec)
+{
+  Gstqroverlay *filter = GST_QROVERLAY (object);
+
+  switch (prop_id) {
+    case PROP_X_AXIS:
+      g_value_set_float (value, filter->x_percent);
+      break;
+    case PROP_Y_AXIS:
+      g_value_set_float (value, filter->y_percent);
+      break;
+    case PROP_PIXEL_SIZE:
+      g_value_set_float (value, filter->qrcode_size);
+      break;
+    case PROP_QRCODE_ERROR_CORRECTION:
+      g_value_set_enum (value, filter->qrcode_quality);
+      break;
+    case PROP_DATA_INTERVAL_BUFFERS:
+      g_value_set_int64 (value, filter->extra_data_interval_buffers);
+      break;
+    case PROP_DATA_SPAN_BUFFERS:
+      g_value_set_int64 (value, filter->extra_data_span_buffers);
+      break;
+    case PROP_EXTRA_DATA_NAME:
+      g_value_set_string (value, filter->extra_data_name);
+      break;
+    case PROP_EXTRA_DATA_ARRAY:
+      g_value_set_string (value, filter->extra_data_array);
+      break;
+    default:
+      G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
+      break;
+  }
+}
+
+static gboolean
+gst_qroverlay_set_caps (GstBaseTransform * trans, GstCaps * in, GstCaps * out)
+{
+  Gstqroverlay *filter = GST_QROVERLAY (trans);
+  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;
+}
+
+gchar *
+parse_data_array (Gstqroverlay * filter, gchar * value_in_array)
+{
+  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;
+}
+
+gchar *
+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;
+
+  Gstqroverlay *filter = GST_QROVERLAY (base);
+  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;
+}
+
+void
+overlay_qr_in_frame (Gstqroverlay * filter, QRcode * qrcode, GstBuffer * outbuf)
+{
+  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, &current_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, &current_info);
+}
+
+/* GstBaseTransform vmethod implementations */
+/* this function does the actual processing
+ */
+static GstFlowReturn
+gst_qroverlay_transform_ip (GstBaseTransform * base, GstBuffer * outbuf)
+{
+  Gstqroverlay *filter = GST_QROVERLAY (base);
+  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)
+{
+  /* initialize gst controller library */
+  //gst_controller_init(NULL, NULL);
+  GST_DEBUG_CATEGORY_INIT (gst_qroverlay_debug, "qroverlay", 0,
+      "Qrcode overlay element");
+
+  return gst_element_register (qroverlay, "qroverlay", GST_RANK_NONE,
+      GST_TYPE_QROVERLAY);
+}
+
+GST_PLUGIN_DEFINE (GST_VERSION_MAJOR,
+    GST_VERSION_MINOR,
+    qroverlay,
+    "libqrencode qroverlay plugin",
+    qroverlay_init, VERSION, "LGPL", PACKAGE_NAME, GST_PACKAGE_ORIGIN)

ext/qroverlay/gstqroverlay.h

@@ -0,0 +1,75 @@
+/* 
+ * GStreamer
+ * Copyright (C) 2006 Stefan Kost <ensonic@users.sf.net>
+ * Copyright (C) 2015 anthony <<user@hostname.org>>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Library General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Library General Public License for more details.
+ *
+ * You should have received a copy of the GNU Library General Public
+ * License along with this library; if not, write to the
+ * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ * Boston, MA 02111-1307, USA.
+ */
+ 
+#ifndef __GST_QROVERLAY_H__
+#define __GST_QROVERLAY_H__
+
+#include <gst/gst.h>
+#include <gst/base/gstbasetransform.h>
+
+G_BEGIN_DECLS
+
+#define GST_TYPE_QROVERLAY \
+  (gst_qroverlay_get_type())
+#define GST_QROVERLAY(obj) \
+  (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_QROVERLAY,Gstqroverlay))
+#define GST_QROVERLAY_CLASS(klass) \
+  (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_QROVERLAY,GstqroverlayClass))
+#define GST_IS_QROVERLAY(obj) \
+  (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_QROVERLAY))
+#define GST_IS_QROVERLAY_CLASS(klass) \
+  (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_QROVERLAY))
+
+typedef struct _Gstqroverlay      Gstqroverlay;
+typedef struct _GstqroverlayClass GstqroverlayClass;
+
+struct _Gstqroverlay {
+  GstBaseTransform element;
+
+  guint32	frame_number;
+  guint32	width;
+  guint32	height;
+  gfloat	qrcode_size;
+  guint 	qrcode_quality;
+  guint 	array_counter;
+  guint 	array_size;
+  guint 	span_frame;
+  guint64	extra_data_interval_buffers;
+  guint64	extra_data_span_buffers;
+  QRecLevel level;
+  gchar		*framerate_string;
+  const gchar 	*extra_data_name;
+  const gchar		*extra_data_array;
+  gfloat	x_percent;
+  gfloat	y_percent;
+  gboolean	silent;
+  gboolean	extra_data_enabled;
+};
+
+struct _GstqroverlayClass {
+  GstBaseTransformClass parent_class;
+};
+
+GType gst_qroverlay_get_type (void);
+
+G_END_DECLS
+
+#endif /* __GST_QROVERLAY_H__ */

ext/qroverlay/meson.build

@@ -0,0 +1,13 @@
+qrencode_dep = dependency('libqrencode', required: get_option('qroverlay'))
+if qrencode_dep.found()
+  gstqroverlay = library('gstqroverlay', ['gstqroverlay.c'],
+    c_args : gst_plugins_bad_args,
+    include_directories : [configinc],
+    dependencies : [gstbase_dep, qrencode_dep],
+    install : true,
+    install_dir : plugins_install_dir,
+  )
+  pkgconfig.generate(gstqroverlay, install_dir : plugins_pkgconfig_install_dir)
+  plugins += [gstqroverlay]
+endif
+

meson_options.txt

@@ -47,6 +47,7 @@ option('onvif', type : 'feature', value : 'auto')
 option('pcapparse', type : 'feature', value : 'auto')
 option('pnm', type : 'feature', value : 'auto')
 option('proxy', type : 'feature', value : 'auto')
+option('qroverlay', type : 'feature', value : 'auto')
 option('rawparse', type : 'feature', value : 'auto')
 option('removesilence', type : 'feature', value : 'auto')
 option('rist', type : 'feature', value : 'auto')