Adds frame_id to GstZedSrcMeta

Adds a frame_id field to the ZedSrc MetaData in order to allow
buffers to be tracked throughout a GStreamer pipeline.

Author: ryanppeters

gst-zed-data-mux/gstzeddatamux.cpp

@@ -466,7 +466,7 @@ static GstFlowReturn gst_zeddatamux_chain_data(GstPad* pad, GstObject * parent,
                     gst_buffer_add_zed_src_meta( out_buf,
                                                  meta->info,
                                                  meta->pose, meta->sens,
-                                                 meta->od_enabled, meta->obj_count, meta->objects);
+                                                 meta->od_enabled, meta->obj_count, meta->objects, meta->frame_id);
 
                     // ----> Timestamp meta-data
                     GST_TRACE ("Out buffer set timestamp" );
@@ -621,7 +621,7 @@ static GstFlowReturn gst_zeddatamux_chain_video(GstPad* pad, GstObject * parent,
                     gst_buffer_add_zed_src_meta( out_buf,
                                                  meta->info,
                                                  meta->pose, meta->sens,
-                                                 meta->od_enabled, meta->obj_count, meta->objects);
+                                                 meta->od_enabled, meta->obj_count, meta->objects, meta->frame_id);
 
                     // ----> Timestamp meta-data
                     GST_TRACE ("Out buffer set timestamp" );

gst-zed-demux/gstzeddemux.cpp

@@ -560,7 +560,8 @@ static GstFlowReturn gst_zeddemux_chain(GstPad* pad, GstObject * parent, GstBuff
                                              meta->sens,
                                              meta->od_enabled,
                                              meta->obj_count,
-                                             meta->objects );
+                                             meta->objects,
+                                             meta->frame_id );
             }
 
             GST_TRACE ("Left buffer set timestamp" );
@@ -651,7 +652,8 @@ static GstFlowReturn gst_zeddemux_chain(GstPad* pad, GstObject * parent, GstBuff
                                              meta->sens,
                                              meta->od_enabled,
                                              meta->obj_count,
-                                             meta->objects );
+                                             meta->objects,
+                                             meta->frame_id );
             }
 
             GST_TRACE ("Aux buffer set timestamp" );

gst-zed-meta/gstzedmeta.cpp

@@ -123,7 +123,8 @@ static gboolean gst_zed_src_meta_transform( GstBuffer* transbuf, GstMeta * meta,
                                  emeta->sens,
                                  emeta->od_enabled,
                                  emeta->obj_count,
-                                 emeta->objects );
+                                 emeta->objects, 
+                                 emeta->frame_id);
 
 
     return TRUE;
@@ -162,7 +163,8 @@ GstZedSrcMeta* gst_buffer_add_zed_src_meta( GstBuffer* buffer,
                                             ZedSensors& sens,
                                             gboolean od_enabled,
                                             guint8 obj_count,
-                                            ZedObjectData* objects)
+                                            ZedObjectData* objects,
+                                            guint64 frame_id)
 {
     GST_TRACE( "gst_buffer_add_zed_src_meta" );
 
@@ -183,5 +185,7 @@ GstZedSrcMeta* gst_buffer_add_zed_src_meta( GstBuffer* buffer,
 
     memcpy( &meta->objects, objects, obj_count*sizeof(ZedObjectData));
 
+    meta->frame_id = frame_id;
+
     return meta;
 }

gst-zed-meta/gstzedmeta.h

@@ -184,6 +184,7 @@ struct _GstZedSrcMeta {
 
     gboolean od_enabled;
     guint8 obj_count;
+    guint64 frame_id;
     ZedObjectData objects[256];
 };
 
@@ -258,7 +259,8 @@ GstZedSrcMeta* gst_buffer_add_zed_src_meta( GstBuffer* buffer,
                                             ZedSensors& sens,
                                             gboolean od_enabled,
                                             guint8 obj_count,
-                                            ZedObjectData* objects);
+                                            ZedObjectData* objects,
+                                            guint64 frame_id);
 
 G_END_DECLS
 

gst-zed-src/gstzedsrc.cpp

@@ -2313,15 +2313,16 @@ static GstFlowReturn gst_zedsrc_fill( GstPushSrc * psrc, GstBuffer * buf )
     }
     // <---- Object detection metadata
 
-    gst_buffer_add_zed_src_meta( buf, info, pose, sens, src->object_detection, obj_count, obj_data);
-
     // ----> Timestamp meta-data
     GST_BUFFER_TIMESTAMP(buf) = GST_CLOCK_DIFF (gst_element_get_base_time (GST_ELEMENT (src)),
                                                 clock_time);
     GST_BUFFER_DTS(buf) = GST_BUFFER_TIMESTAMP(buf);
     GST_BUFFER_OFFSET(buf) = temp_ugly_buf_index++;
     // <---- Timestamp meta-data
 
+    guint64 offset = GST_BUFFER_OFFSET(buf);
+    GstZedSrcMeta* meta = gst_buffer_add_zed_src_meta( buf, info, pose, sens, src->object_detection, obj_count, obj_data, offset);
+
     // Buffer release
     gst_buffer_unmap( buf, &minfo );
     // gst_buffer_unref(buf); // NOTE: do not uncomment to not crash