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qroverlay: Factor out qroverlay logic to a base class

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Part-of: <https://gitlab.freedesktop.org/gstreamer/gst-plugins-bad/-/merge_requests/1730>
This commit is contained in:
Thibault Saunier 2020-07-11 23:36:03 -04:00 committed by GStreamer Merge Bot
parent 4afa2d2c3d
commit 964c8aa5e0
3 changed files with 21 additions and 214 deletions
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223
ext/qroverlay/gstqroverlay.c
View file

@ -59,32 +59,27 @@
GST_DEBUG_CATEGORY_STATIC (gst_qr_overlay_debug);
#define GST_CAT_DEFAULT gst_qr_overlay_debug
static gchar *get_qrcode_content (GstBaseQROverlay * filter,
GstVideoFrame * frame);
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,
};
typedef struct _GstQROverlayPrivate GstQROverlayPrivate;
struct _GstQROverlayPrivate
{
guint32 frame_number;
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;
gchar *extra_data_name;
gchar *extra_data_str;
gchar **extra_data_array;
@ -96,61 +91,18 @@ struct _GstQROverlayPrivate
#define PRIV(s) gst_qr_overlay_get_instance_private (GST_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_qr_overlay_parent_class parent_class
G_DEFINE_TYPE_WITH_PRIVATE (GstQROverlay, gst_qr_overlay,
GST_TYPE_VIDEO_FILTER);
GST_TYPE_BASE_QR_OVERLAY);
static void gst_qr_overlay_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec);
static void gst_qr_overlay_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec);
static GstFlowReturn
gst_qr_overlay_transform_frame_ip (GstVideoFilter * base,
GstVideoFrame * frame);
/* GObject vmethod implementations */
/* initialize the qroverlay's class */
@ -166,23 +118,6 @@ gst_qr_overlay_class_init (GstQROverlayClass * klass)
gobject_class->set_property = gst_qr_overlay_set_property;
gobject_class->get_property = gst_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_DATA_INTERVAL_BUFFERS,
g_param_spec_int64 ("extra-data-interval-buffers",
@ -208,10 +143,6 @@ gst_qr_overlay_class_init (GstQROverlayClass * klass)
" cycled from at each interval, example 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",
@ -219,15 +150,10 @@ gst_qr_overlay_class_init (GstQROverlayClass * klass)
"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_type_mark_as_plugin_api (GST_TYPE_BASE_QR_OVERLAY, 0);
gst_type_mark_as_plugin_api (GST_TYPE_QRCODE_QUALITY, 0);
GST_VIDEO_FILTER_CLASS (klass)->transform_frame_ip =
GST_DEBUG_FUNCPTR (gst_qr_overlay_transform_frame_ip);
GST_BASE_QR_OVERLAY_CLASS (klass)->get_content =
GST_DEBUG_FUNCPTR (get_qrcode_content);
}
/* initialize the new element
@ -241,13 +167,11 @@ gst_qr_overlay_init (GstQROverlay * filter)
priv->frame_number = 1;
priv->x_percent = 50.0;
priv->y_percent = 50.0;
priv->qrcode_quality = DEFAULT_PROP_QUALITY;
priv->array_counter = 0;
priv->array_size = 0;
priv->extra_data_interval_buffers = 60;
priv->extra_data_span_buffers = 1;
priv->span_frame = 0;
priv->qrcode_size = DEFAULT_PROP_PIXEL_SIZE;
}
static void
@ -257,18 +181,6 @@ gst_qr_overlay_set_property (GObject * object, guint prop_id,
GstQROverlayPrivate *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;
case PROP_DATA_INTERVAL_BUFFERS:
priv->extra_data_interval_buffers = g_value_get_int64 (value);
break;
@ -302,18 +214,6 @@ gst_qr_overlay_get_property (GObject * object, guint prop_id,
GstQROverlayPrivate *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;
case PROP_DATA_INTERVAL_BUFFERS:
g_value_set_int64 (value, priv->extra_data_interval_buffers);
break;
@ -333,20 +233,24 @@ gst_qr_overlay_get_property (GObject * object, guint prop_id,
}
static gchar *
get_qrcode_content (GstQROverlay * filter, GstBuffer * outbuf)
get_qrcode_content (GstBaseQROverlay * filter, GstVideoFrame * frame)
{
GstQROverlayPrivate *priv = PRIV (filter);
GstBuffer *buf = frame->buffer;
GString *res = g_string_new (NULL);
JsonGenerator *jgen;
gchar *framerate_string =
g_strdup_printf ("%d/%d", frame->info.fps_n, frame->info.fps_d);
JsonObject *jobj = json_object_new ();
JsonNode *root = json_node_new (JSON_NODE_OBJECT);
json_object_set_int_member (jobj, "TIMESTAMP",
(gint64) GST_BUFFER_TIMESTAMP (outbuf));
(gint64) GST_BUFFER_TIMESTAMP (buf));
json_object_set_int_member (jobj, "BUFFERCOUNT", (gint64) priv->frame_number);
json_object_set_string_member (jobj, "FRAMERATE", priv->framerate_string);
json_object_set_string_member (jobj, "FRAMERATE", framerate_string);
json_object_set_string_member (jobj, "NAME", GST_ELEMENT_NAME (filter));
g_free (framerate_string);
if (priv->extra_data_array && priv->extra_data_name &&
(priv->frame_number == 1
@ -370,108 +274,11 @@ get_qrcode_content (GstQROverlay * filter, GstBuffer * outbuf)
json_generator_set_root (jgen, root);
res = json_generator_to_gstring (jgen, res);
g_object_unref (jgen);
priv->frame_number++;
return g_strdup (g_string_free (res, FALSE));
}
static void
overlay_qr_in_frame (GstQROverlay * filter, QRcode * qrcode,
GstVideoFrame * frame)
{
GstQROverlayPrivate *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_qr_overlay_transform_frame_ip (GstVideoFilter * base, GstVideoFrame * frame)
{
GstQROverlayPrivate *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 = get_qrcode_content (GST_QR_OVERLAY (base), frame->buffer);
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_QR_OVERLAY (base), qrcode, frame);
priv->frame_number++;
} else {
GST_WARNING_OBJECT (base, "Could not encode content: %s", content);
}
g_free (content);
return GST_FLOW_OK;
}
static gboolean
qroverlay_init (GstPlugin * qroverlay)
{

10
ext/qroverlay/gstqroverlay.h
View file

@ -22,16 +22,16 @@
#ifndef __GST_QR_OVERLAY_H__
#define __GST_QR_OVERLAY_H__
#include <gst/gst.h>
#include <gst/video/gstvideofilter.h>
#include "gstbaseqroverlay.h"
G_BEGIN_DECLS
#define GST_TYPE_QR_OVERLAY (gst_qr_overlay_get_type())
G_DECLARE_DERIVABLE_TYPE (GstQROverlay, gst_qr_overlay, GST, QR_OVERLAY, GstVideoFilter);
struct _GstQROverlayClass
G_DECLARE_FINAL_TYPE (GstQROverlay, gst_qr_overlay, GST, QR_OVERLAY, GstBaseQROverlay);
struct _GstQROverlay
{
GstVideoFilterClass parent;
GstBaseQROverlay parent;
};
G_END_DECLS

2
ext/qroverlay/meson.build
View file

@ -1,7 +1,7 @@
qrencode_dep = dependency('libqrencode', required: get_option('qroverlay'))
json_dep = dependency('json-glib-1.0', fallback : ['json-glib', 'json_glib_dep'])
if qrencode_dep.found()
gstqroverlay = library('gstqroverlay', ['gstqroverlay.c'],
gstqroverlay = library('gstqroverlay', ['gstqroverlay.c', 'gstbaseqroverlay.c'],
c_args : gst_plugins_bad_args,
include_directories : [configinc],
dependencies : [gstvideo_dep, qrencode_dep, json_dep],