gstreamer/ext/qroverlay/gstbaseqroverlay.c

336 lines
9.9 KiB
C

/*
* GStreamer
* Copyright (C) 2006 Stefan Kost <ensonic@users.sf.net>
* Copyright (c) 2020 Anthony Violo <anthony.violo@ubicast.eu>
* Copyright (c) 2020 Thibault Saunier <tsaunier@igalia.com>
*
* 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.
*/
/**
* plugin-qroverlay
*
* Since: 1.20
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <gst/gst.h>
#include <gst/base/gstbasetransform.h>
#include <json-glib/json-glib.h>
#include <qrencode.h>
#include <string.h>
#include <stdio.h>
#include <stdlib.h>
#include "gstbaseqroverlay.h"
GST_DEBUG_CATEGORY_STATIC (gst_base_qr_overlay_debug);
#define GST_CAT_DEFAULT gst_base_qr_overlay_debug
enum
{
PROP_0,
PROP_X_AXIS,
PROP_Y_AXIS,
PROP_PIXEL_SIZE,
PROP_QRCODE_ERROR_CORRECTION,
};
typedef struct _GstBaseQROverlayPrivate GstBaseQROverlayPrivate;
struct _GstBaseQROverlayPrivate
{
gfloat qrcode_size;
guint qrcode_quality;
guint span_frame;
QRecLevel level;
gfloat x_percent;
gfloat y_percent;
};
#define PRIV(s) gst_base_qr_overlay_get_instance_private (GST_BASE_QR_OVERLAY (s))
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 DEFAULT_PROP_PIXEL_SIZE 3
#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_base_qr_overlay_parent_class parent_class
G_DEFINE_TYPE_WITH_PRIVATE (GstBaseQROverlay, gst_base_qr_overlay,
GST_TYPE_VIDEO_FILTER);
static void gst_base_qr_overlay_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec);
static void gst_base_qr_overlay_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec);
static GstFlowReturn
gst_base_qr_overlay_transform_frame_ip (GstVideoFilter * base,
GstVideoFrame * frame);
/* GObject vmethod implementations */
/* initialize the qroverlay's class */
static void
gst_base_qr_overlay_class_init (GstBaseQROverlayClass * klass)
{
GObjectClass *gobject_class;
GstElementClass *gstelement_class;
gobject_class = (GObjectClass *) klass;
gstelement_class = (GstElementClass *) klass;
gobject_class->set_property = gst_base_qr_overlay_set_property;
gobject_class->get_property = gst_base_qr_overlay_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, DEFAULT_PROP_PIXEL_SIZE, 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_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_type_mark_as_plugin_api (GST_TYPE_QRCODE_QUALITY, 0);
GST_VIDEO_FILTER_CLASS (klass)->transform_frame_ip =
GST_DEBUG_FUNCPTR (gst_base_qr_overlay_transform_frame_ip);
gst_type_mark_as_plugin_api (GST_TYPE_QRCODE_QUALITY, 0);
}
/* initialize the new element
* initialize instance structure
*/
static void
gst_base_qr_overlay_init (GstBaseQROverlay * filter)
{
GstBaseQROverlayPrivate *priv = PRIV (filter);
priv->x_percent = 50.0;
priv->y_percent = 50.0;
priv->qrcode_quality = DEFAULT_PROP_QUALITY;
priv->span_frame = 0;
priv->qrcode_size = DEFAULT_PROP_PIXEL_SIZE;
}
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;
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;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
overlay_qr_in_frame (GstBaseQROverlay * filter, QRcode * qrcode,
GstVideoFrame * frame)
{
GstBaseQROverlayPrivate *priv = PRIV (filter);
guchar *source_data;
gint32 k, y, x, yy, square_size, line = 0;
int x1, x2, y1, y2;
guint8 *d;
gint stride;
square_size = (qrcode->width + 4 * 2) * priv->qrcode_size;
/* White bg */
x1 = (int) (GST_VIDEO_FRAME_WIDTH (frame) -
square_size) * (priv->x_percent / 100);
x1 = GST_ROUND_DOWN_2 (x1);
x2 = x1 + square_size;
y1 = (int) (GST_VIDEO_FRAME_HEIGHT (frame) -
square_size) * (priv->y_percent / 100);
y1 = GST_ROUND_DOWN_4 (y1);
y2 = y1 + square_size;
d = GST_VIDEO_FRAME_PLANE_DATA (frame, 0);
stride = GST_VIDEO_FRAME_PLANE_STRIDE (frame, 0);
/* Start drawing the white luma plane */
for (y = y1; y < y2; y++) {
for (x = x1; x < x2; x += square_size)
memset (&d[y * stride + x], 0xff, square_size);
}
/* Draw the black QR code blocks with 4px white space around it
* on top */
line += 4 * priv->qrcode_size * stride;
source_data = qrcode->data;
for (y = 0; y < qrcode->width; y++) {
for (x = 0; x < (qrcode->width); x++) {
for (yy = 0; yy < priv->qrcode_size; yy++) {
k = ((((line + (4 * priv->qrcode_size))) + stride * yy +
x * priv->qrcode_size) + x1) + (y1 * stride);
if (*source_data & 1) {
memset (d + k, 0, priv->qrcode_size);
}
}
source_data++;
}
line += (stride * priv->qrcode_size);
}
/* Set Chrominance planes */
x1 /= 2;
x2 /= 2;
y1 /= 2;
y2 /= 2;
stride = GST_VIDEO_FRAME_PLANE_STRIDE (frame, 1);
for (y = y1; y < y2; y++) {
for (x = x1; x < x2; x += (x2 - x1)) {
d = GST_VIDEO_FRAME_PLANE_DATA (frame, 1);
memset (&d[y * stride + x], 128, (x2 - x1));
d = GST_VIDEO_FRAME_PLANE_DATA (frame, 2);
memset (&d[y * stride + x], 128, (x2 - x1));
}
}
QRcode_free (qrcode);
}
/* GstBaseTransform vmethod implementations */
/* this function does the actual processing
*/
static GstFlowReturn
gst_base_qr_overlay_transform_frame_ip (GstVideoFilter * base,
GstVideoFrame * frame)
{
GstBaseQROverlayPrivate *priv = PRIV (base);
QRcode *qrcode;
gchar *content;
GstClockTime rtime =
gst_segment_to_running_time (&GST_BASE_TRANSFORM (base)->segment,
GST_FORMAT_TIME, GST_BUFFER_PTS (frame->buffer));
if (GST_CLOCK_TIME_IS_VALID (rtime))
gst_object_sync_values (GST_OBJECT (base), rtime);
content =
GST_BASE_QR_OVERLAY_GET_CLASS (base)->get_content (GST_BASE_QR_OVERLAY
(base), frame);
GST_INFO_OBJECT (base, "String will be encoded : %s", content);
qrcode = QRcode_encodeString (content, 0, priv->qrcode_quality, QR_MODE_8, 0);
if (qrcode) {
GST_DEBUG_OBJECT (base, "String encoded");
overlay_qr_in_frame (GST_BASE_QR_OVERLAY (base), qrcode, frame);
} else {
GST_WARNING_OBJECT (base, "Could not encode content: %s", content);
}
g_free (content);
return GST_FLOW_OK;
}