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objectdetectionoverlay: Print tracking id

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Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/9440>
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Olivier Crête 2025-07-24 17:44:46 -04:00 committed by GStreamer Marge Bot
parent 4a986e611b
commit 7456266117
1 changed files with 69 additions and 0 deletions
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69
subprojects/gst-plugins-bad/ext/analyticsoverlay/gstobjectdetectionoverlay.c
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@ -178,6 +178,13 @@ gst_object_detection_overlay_render_text_annotation (GstObjectDetectionOverlay
* overlay, GstObjectDetectionOverlayPangoCairoContext * cairo_ctx,
GstAnalyticsODMtd * od_mtd, const gchar * annotation);
static void
gst_object_detection_overlay_render_tracking_text_annotation
(GstObjectDetectionOverlay * overlay,
GstObjectDetectionOverlayPangoCairoContext * ctx,
GstAnalyticsRelationMeta * rmeta, const GstAnalyticsODMtd * od_mtd);
static void
gst_object_detection_overlay_class_init (GstObjectDetectionOverlayClass * klass)
{
@ -842,6 +849,9 @@ gst_object_detection_overlay_transform_frame_ip (GstVideoFilter * filter,
g_free (text);
}
gst_object_detection_overlay_render_tracking_text_annotation
(GST_OBJECT_DETECTION_OVERLAY (filter), &cairo_ctx, rmeta, od_mtd);
}
rectangle = gst_video_overlay_rectangle_new_raw (overlay->canvas,
@ -960,3 +970,62 @@ gst_object_detection_overlay_render_text_annotation (GstObjectDetectionOverlay
cairo_stroke (ctx->cr);
cairo_restore (ctx->cr);
}
static void
gst_object_detection_overlay_render_tracking_text_annotation
(GstObjectDetectionOverlay * overlay,
GstObjectDetectionOverlayPangoCairoContext * ctx,
GstAnalyticsRelationMeta * rmeta, const GstAnalyticsODMtd * od_mtd)
{
GstAnalyticsMtd tracking_mtd;
guint64 tid;
gboolean lost;
PangoRectangle ink_rect, logical_rect;
gint x, y, w, h;
gint maxw = GST_VIDEO_INFO_WIDTH (overlay->in_info) - 1;
gint maxh = GST_VIDEO_INFO_HEIGHT (overlay->in_info) - 1;
gchar *annotation;
if (!gst_analytics_relation_meta_get_direct_related (rmeta, od_mtd->id,
GST_ANALYTICS_REL_TYPE_RELATE_TO,
gst_analytics_tracking_mtd_get_mtd_type (), NULL, &tracking_mtd))
return;
gst_analytics_od_mtd_get_location (od_mtd, &x, &y, &w, &h, NULL);
gst_analytics_tracking_mtd_get_info (&tracking_mtd, &tid, NULL, NULL, &lost);
cairo_save (ctx->cr);
x = CLAMP (x, 0, maxw);
y = CLAMP (y, 0, maxh);
w = CLAMP (w, 0, maxw - x);
h = CLAMP (h, 0, maxh - y);
/* Set label strokes color and width */
cairo_set_source_rgba (ctx->cr,
((overlay->labels_color >> 16) & 0xFF) / 255.0,
((overlay->labels_color >> 8) & 0xFF) / 255.0,
((overlay->labels_color) & 0xFF) / 255.0,
((overlay->labels_color >> 24) & 0xFF) / 255.0);
cairo_set_line_width (ctx->cr, overlay->labels_stroke_width);
annotation = g_strdup_printf ("Track: %" G_GUINT64_FORMAT, tid);
pango_layout_set_markup (overlay->pango_layout, annotation,
strlen (annotation));
g_free (annotation);
pango_layout_get_pixel_extents (overlay->pango_layout, &ink_rect,
&logical_rect);
GST_LOG_OBJECT (overlay, "logical_rect:(%d,%d),%dx%d", logical_rect.x,
logical_rect.y, logical_rect.width, logical_rect.height);
GST_LOG_OBJECT (overlay, "ink_rect:(%d,%d),%dx%d", ink_rect.x, ink_rect.y,
ink_rect.width, ink_rect.height);
cairo_move_to (ctx->cr, x + overlay->labels_outline_ofs,
y + h - logical_rect.height - overlay->labels_outline_ofs);
pango_cairo_layout_path (ctx->cr, overlay->pango_layout);
cairo_stroke (ctx->cr);
cairo_restore (ctx->cr);
}