--- /dev/null
+/*
+ * 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, ¤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
+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)
projects / platform / upstream / gstreamer.git / commitdiff