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218 lines
6.5 KiB
C
218 lines
6.5 KiB
C
/* GStreamer
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* Copyright (C) 2023 Collabora Ltd
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*
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* gstanalyticsobjecttrackingmtd.c
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include "gstanalyticsobjecttrackingmtd.h"
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/**
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* SECTION:gstanalyticsobjecttrackingmtd
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* @title: GstAnalyticsTrackingMtd
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* @short_description: An analytics metadata for tracking inside a #GstAnalyticsRelationMeta
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* @symbols:
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* - GstAnalyticsTrackingMtd
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* @see_also: #GstAnalyticsMtd, #GstAnalyticsRelationMeta
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*
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* This type of metadata holds tracking information. In many cases, it is
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* desired to track an object across many frames. This type of metadata holds
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* information about the tracking, for example, it can be used alongside a
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* #GstAnalyticsODMtd to track an object.
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*
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* Since: 1.24
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*/
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typedef struct _GstAnalyticsTrackingMtdData GstAnalyticsTrackingMtdData;
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/**
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* GstAnalyticsTrackingMtd:
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* @tracking_id: Tracking identifier
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* @tracking_first_seen: Tracking creation time
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* @tracking_last_seen: Tracking last observation
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* @tracking_lost: Track lost
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*
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* Store information on results of object tracking
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*
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* Since: 1.24
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*/
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struct _GstAnalyticsTrackingMtdData
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{
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guint64 tracking_id;
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GstClockTime tracking_first_seen;
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GstClockTime tracking_last_seen;
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gboolean tracking_lost;
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};
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static const GstAnalyticsMtdImpl tracking_impl = {
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"object-tracking",
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NULL
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};
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/**
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* gst_analytics_tracking_mtd_get_mtd_type:
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*
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* Returns: id representing the type of GstAnalyticsRelatableMtd
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*
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* Get the opaque id identifying the relatable type
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*
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* Since: 1.24
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*/
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GstAnalyticsMtdType
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gst_analytics_tracking_mtd_get_mtd_type (void)
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{
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return (GstAnalyticsMtdType) & tracking_impl;
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}
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/**
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* gst_analytics_tracking_mtd_update_last_seen:
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* @instance: GstAnalyticsTrackingMtd instance
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* @last_seen: Timestamp of last time this object was tracked
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*
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* Since: 1.24
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*/
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gboolean
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gst_analytics_tracking_mtd_update_last_seen (GstAnalyticsTrackingMtd * instance,
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GstClockTime last_seen)
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{
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GstAnalyticsTrackingMtdData *trk_mtd_data;
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g_return_val_if_fail (instance, FALSE);
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trk_mtd_data = gst_analytics_relation_meta_get_mtd_data (instance->meta,
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instance->id);
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g_return_val_if_fail (trk_mtd_data != NULL, FALSE);
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trk_mtd_data->tracking_last_seen = last_seen;
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return TRUE;
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}
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/**
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* gst_analytics_tracking_mtd_set_lost:
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* @instance: Instance of GstAnalyticsTrackingMtd.
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* Set tracking to lost
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*
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* Returns: Update successful
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*
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* Since: 1.24
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*/
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gboolean
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gst_analytics_tracking_mtd_set_lost (GstAnalyticsTrackingMtd * instance)
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{
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GstAnalyticsTrackingMtdData *trk_mtd_data;
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g_return_val_if_fail (instance, FALSE);
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trk_mtd_data = gst_analytics_relation_meta_get_mtd_data (instance->meta,
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instance->id);
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g_return_val_if_fail (trk_mtd_data != NULL, FALSE);
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trk_mtd_data->tracking_lost = TRUE;
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return TRUE;
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}
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/**
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* gst_analytics_tracking_mtd_get_info:
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* @instance: Instance of tracking metadata
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* @tracking_id: (out): Updated tracking id
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* @tracking_first_seen: (out): Updated timestamp of the tracking first observation.
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* @tracking_last_seen: (out): Updated timestamp of the tracking last observation.
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* @tracking_lost: (out): Has the tracking been lost
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*
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* Retrieve tracking information.
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*
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* Returns: Successfully retrieved info.
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* Since: 1.24
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*/
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gboolean
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gst_analytics_tracking_mtd_get_info (const GstAnalyticsTrackingMtd * instance,
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guint64 * tracking_id, GstClockTime * tracking_first_seen, GstClockTime *
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tracking_last_seen, gboolean * tracking_lost)
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{
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GstAnalyticsTrackingMtdData *trk_mtd_data;
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g_return_val_if_fail (instance, FALSE);
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trk_mtd_data = gst_analytics_relation_meta_get_mtd_data (instance->meta,
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instance->id);
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g_return_val_if_fail (trk_mtd_data != NULL, FALSE);
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if (tracking_id)
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*tracking_id = trk_mtd_data->tracking_id;
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if (tracking_first_seen)
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*tracking_first_seen = trk_mtd_data->tracking_first_seen;
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if (tracking_last_seen)
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*tracking_last_seen = trk_mtd_data->tracking_last_seen;
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if (tracking_lost)
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*tracking_lost = trk_mtd_data->tracking_lost;
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return TRUE;
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}
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/**
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* gst_analytics_relation_meta_add_tracking_mtd:
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* @instance: Instance of GstAnalyticsRelationMeta where to add tracking mtd
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* @tracking_id: Tracking id
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* @tracking_first_seen: Timestamp of first time the object was observed.
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* @trk_mtd: (out) (not nullable): Handle updated with newly added tracking meta.
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* Add an analytic tracking metadata to @instance.
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* Returns: Added successfully
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*
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* Since: 1.24
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*/
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gboolean
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gst_analytics_relation_meta_add_tracking_mtd (GstAnalyticsRelationMeta *
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instance, guint64 tracking_id, GstClockTime tracking_first_seen,
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GstAnalyticsTrackingMtd * trk_mtd)
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{
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g_return_val_if_fail (instance, FALSE);
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gsize size = sizeof (GstAnalyticsTrackingMtdData);
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GstAnalyticsTrackingMtdData *trk_mtd_data = (GstAnalyticsTrackingMtdData *)
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gst_analytics_relation_meta_add_mtd (instance, &tracking_impl, size,
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trk_mtd);
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if (trk_mtd_data) {
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trk_mtd_data->tracking_id = tracking_id;
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trk_mtd_data->tracking_first_seen = tracking_first_seen;
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trk_mtd_data->tracking_last_seen = tracking_first_seen;
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trk_mtd_data->tracking_lost = FALSE;
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}
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return trk_mtd_data != NULL;
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}
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/**
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* gst_analytics_relation_meta_get_tracking_mtd:
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* @meta: Instance of GstAnalyticsRelationMeta
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* @an_meta_id: Id of GstAnalyticsMtd instance to retrieve
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* @rlt: (out caller-allocates)(not nullable): Will be filled with relatable
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* meta
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*
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* Fill @rlt if a analytics-meta with id == @an_meta_id exist in @meta instance,
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* otherwise this method return FALSE and @rlt is invalid.
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*
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* Returns: TRUE if successful.
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*
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* Since: 1.24
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*/
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gboolean
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gst_analytics_relation_meta_get_tracking_mtd (GstAnalyticsRelationMeta * meta,
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guint an_meta_id, GstAnalyticsTrackingMtd * rlt)
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{
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return gst_analytics_relation_meta_get_mtd (meta, an_meta_id,
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gst_analytics_tracking_mtd_get_mtd_type (),
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(GstAnalyticsTrackingMtd *) rlt);
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}
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