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qroverlay: Change pixel-size to percent of width or height

Browse source 
The size is now expressed in percent of the smallest dimention. 100
means the biggest square that fits the render area.

Fixes: #3695
Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/7638>
This commit is contained in:
Xavier Claessens 2024-10-09 17:19:42 -04:00 committed by GStreamer Marge Bot
parent 809ab829d0
commit b4ccd940d4
1 changed files with 81 additions and 41 deletions
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122
subprojects/gst-plugins-bad/ext/qroverlay/gstbaseqroverlay.c
View file

@ -43,7 +43,7 @@ enum
PROP_0,
PROP_X_AXIS,
PROP_Y_AXIS,
PROP_PIXEL_SIZE,
PROP_SIZE,
PROP_QRCODE_ERROR_CORRECTION,
PROP_CASE_SENSITIVE,
};
@ -51,16 +51,18 @@ enum
typedef struct _GstBaseQROverlayPrivate GstBaseQROverlayPrivate;
struct _GstBaseQROverlayPrivate
{
gfloat qrcode_size;
guint qrcode_quality;
guint span_frame;
QRecLevel level;
gfloat x_percent;
gfloat y_percent;
gfloat size_percent;
GstElement *overlaycomposition;
GstVideoInfo info;
gboolean valid;
gboolean case_sensitive;
gint window_width;
gint window_height;
GstPad *sinkpad, *srcpad;
GstVideoOverlayComposition *prev_overlay;
@ -86,7 +88,9 @@ static GstStaticPadTemplate src_template = GST_STATIC_PAD_TEMPLATE ("src",
);
#define DEFAULT_PROP_QUALITY 1
#define DEFAULT_PROP_PIXEL_SIZE 3
#define DEFAULT_PROP_X 50
#define DEFAULT_PROP_Y 50
#define DEFAULT_PROP_SIZE 33
#define DEFAULT_PROP_CASE_SENSITIVE FALSE
#define GST_TYPE_QRCODE_QUALITY (gst_qrcode_quality_get_type())
@ -125,6 +129,9 @@ gst_base_qr_overlay_caps_changed_cb (GstBaseQROverlay * self, GstCaps * caps,
{
GstBaseQROverlayPrivate *priv = PRIV (self);
priv->window_width = window_width;
priv->window_height = window_height;
GST_DEBUG_OBJECT (self, "%" GST_PTR_FORMAT, caps);
if (gst_video_info_from_caps (&priv->info, caps))
@ -136,11 +143,30 @@ gst_base_qr_overlay_caps_changed_cb (GstBaseQROverlay * self, GstCaps * caps,
gst_mini_object_replace (((GstMiniObject **) & priv->prev_overlay), NULL);
}
static void
render_size (GstBaseQROverlay * self, int *width, int *height)
{
GstBaseQROverlayPrivate *priv = PRIV (self);
gdouble video_aspect =
(gdouble) priv->info.width / (gdouble) priv->info.height;
gdouble window_aspect =
(gdouble) priv->window_width / (gdouble) priv->window_height;
/* Render size within the window */
if (video_aspect >= window_aspect) {
*width = priv->window_width;
*height = window_aspect * priv->window_height / video_aspect;
} else {
*width = video_aspect * priv->window_width / window_aspect;
*height = priv->window_height;
}
}
static GstVideoOverlayComposition *
draw_overlay (GstBaseQROverlay * self, QRcode * qrcode)
{
guint8 *qr_data, *pixels;
gint stride, pstride, y, x, yy, square_size;
gint stride, pstride, y, x, yy;
gsize offset, line_offset;
GstVideoInfo info;
GstVideoOverlayRectangle *rect;
@ -150,7 +176,21 @@ draw_overlay (GstBaseQROverlay * self, QRcode * qrcode)
gst_video_info_init (&info);
square_size = (qrcode->width + 4 * 2) * priv->qrcode_size;
int render_width, render_height;
render_size (self, &render_width, &render_height);
// Total size in pixels of the qrcode.
gdouble size_scale = priv->size_percent / 100;
int square_size =
render_width < render_height
? render_width * size_scale : render_height * size_scale;
// Size in pixels of 1 qrcode block (1 block margin on each side).
int qrcode_size = square_size / (qrcode->width + 2);
// Update square_size for a round number of blocks.
square_size = qrcode_size * (qrcode->width + 2);
// Margin in pixels in each side to center the qrcode.
int margin = qrcode_size;
gst_video_info_set_format (&info, GST_VIDEO_FORMAT_ARGB, square_size,
square_size);
@ -159,25 +199,21 @@ draw_overlay (GstBaseQROverlay * self, QRcode * qrcode)
pstride = info.finfo->pixel_stride[0];
/* White background */
for (y = 0; y < info.height; y++)
memset (&pixels[y * stride], 0xff, stride);
memset (pixels, 0xff, info.size);
/* Draw the black QR code blocks with 4px white space around it
* on top */
line_offset = 4 * priv->qrcode_size * stride;
/* Draw the black QR code blocks */
line_offset = margin * stride;
qr_data = qrcode->data;
for (y = 0; y < qrcode->width; y++) {
for (x = 0; x < (qrcode->width); x++) {
for (yy = 0; yy < priv->qrcode_size * pstride; yy += pstride) {
for (yy = 0; yy < qrcode_size * pstride; yy += pstride) {
if (!(*qr_data & 1))
continue;
offset =
(((line_offset + (stride * (yy / pstride))) +
x * priv->qrcode_size * pstride)) +
(priv->qrcode_size * pstride) + (4 * priv->qrcode_size * pstride);
offset = line_offset + stride * (yy / pstride) +
x * qrcode_size * pstride + margin * pstride;
for (gint i = 0; i < priv->qrcode_size * pstride; i += pstride) {
for (gint i = 0; i < qrcode_size * pstride; i += pstride) {
pixels[offset + i] = 0x00;
pixels[offset + i + 1] = 0x00;
pixels[offset + i + 2] = 0x00;
@ -185,23 +221,28 @@ draw_overlay (GstBaseQROverlay * self, QRcode * qrcode)
}
qr_data++;
}
line_offset += (stride * priv->qrcode_size);
line_offset += stride * qrcode_size;
}
buf = gst_buffer_new_wrapped (pixels, info.size);
gst_buffer_add_video_meta (buf, GST_VIDEO_FRAME_FLAG_NONE,
GST_VIDEO_OVERLAY_COMPOSITION_FORMAT_RGB, info.width, info.height);
square_size =
priv->info.width < priv->info.height
? priv->info.width * size_scale : priv->info.height * size_scale;
x = (int) (priv->info.width - square_size) * (priv->x_percent / 100);
x = GST_ROUND_DOWN_2 (x);
y = (int) (priv->info.height - square_size) * (priv->y_percent / 100);
y = GST_ROUND_DOWN_4 (y);
GST_DEBUG_OBJECT (self, "draw overlay at (%d,%d) size: %dx%d", x, y,
info.width, info.height);
square_size, square_size);
rect = gst_video_overlay_rectangle_new_raw (buf, x, y,
info.width, info.height, GST_VIDEO_OVERLAY_FORMAT_FLAG_NONE);
rect =
gst_video_overlay_rectangle_new_raw (buf, x, y, square_size, square_size,
GST_VIDEO_OVERLAY_FORMAT_FLAG_NONE);
comp = gst_video_overlay_composition_new (rect);
gst_video_overlay_rectangle_unref (rect);
@ -283,22 +324,21 @@ gst_base_qr_overlay_class_init (GstBaseQROverlayClass * klass)
GST_DEBUG_CATEGORY_INIT (gst_base_qr_overlay_debug, "qroverlay", 0,
"Qrcode overlay base class");
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_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, DEFAULT_PROP_X,
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_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, DEFAULT_PROP_Y,
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_SIZE,
g_param_spec_float ("size",
"Size of the square (in percent of the smallest of width and height)",
"Size of the square (in percent of the smallest of width and height)",
0.0, 100.0, DEFAULT_PROP_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",
@ -335,12 +375,12 @@ gst_base_qr_overlay_init (GstBaseQROverlay * self)
{
GstBaseQROverlayPrivate *priv = PRIV (self);
priv->x_percent = 50.0;
priv->y_percent = 50.0;
priv->x_percent = DEFAULT_PROP_X;
priv->y_percent = DEFAULT_PROP_X;
priv->size_percent = DEFAULT_PROP_SIZE;
priv->qrcode_quality = DEFAULT_PROP_QUALITY;
priv->case_sensitive = DEFAULT_PROP_CASE_SENSITIVE;
priv->span_frame = 0;
priv->qrcode_size = DEFAULT_PROP_PIXEL_SIZE;
priv->overlaycomposition =
gst_element_factory_make ("overlaycomposition", NULL);
gst_video_info_init (&priv->info);
@ -380,8 +420,8 @@ gst_base_qr_overlay_set_property (GObject * object, guint prop_id,
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);
case PROP_SIZE:
priv->size_percent = g_value_get_float (value);
break;
case PROP_QRCODE_ERROR_CORRECTION:
priv->qrcode_quality = g_value_get_enum (value);
@ -408,8 +448,8 @@ gst_base_qr_overlay_get_property (GObject * object, guint prop_id,
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);
case PROP_SIZE:
g_value_set_float (value, priv->size_percent);
break;
case PROP_QRCODE_ERROR_CORRECTION:
g_value_set_enum (value, priv->qrcode_quality);