1 # SPDX-License-Identifier: MIT
3 # Copyright (c) 2017 Philippe Proulx <pproulx@efficios.com>
5 from bt2
import native_bt
, object, utils
6 from bt2
import interrupter
as bt2_interrupter
7 from bt2
import connection
as bt2_connection
8 from bt2
import component
as bt2_component
10 from bt2
import port
as bt2_port
11 from bt2
import logging
as bt2_logging
15 def _graph_port_added_listener_from_native(
16 user_listener
, component_ptr
, component_type
, port_ptr
, port_type
18 component
= bt2_component
._create
_component
_from
_const
_ptr
_and
_get
_ref
(
19 component_ptr
, component_type
21 port
= bt2_port
._create
_from
_const
_ptr
_and
_get
_ref
(port_ptr
, port_type
)
22 user_listener(component
, port
)
25 class Graph(object._SharedObject
):
28 native_bt
.graph_get_ref(ptr
)
32 native_bt
.graph_put_ref(ptr
)
34 def __init__(self
, mip_version
=0):
35 utils
._check
_uint
64(mip_version
)
37 if mip_version
> bt2
.get_maximal_mip_version():
38 raise ValueError("unknown MIP version {}".format(mip_version
))
40 ptr
= native_bt
.graph_create(mip_version
)
43 raise bt2
._MemoryError("cannot create graph object")
47 # list of listener partials to keep a reference as long as
49 self
._listener
_partials
= []
57 logging_level
=bt2_logging
.LoggingLevel
.NONE
,
59 if isinstance(component_class
, bt2_component
._SourceComponentClassConst
):
60 cc_ptr
= component_class
._ptr
61 add_fn
= native_bt
.bt2_graph_add_source_component
62 cc_type
= native_bt
.COMPONENT_CLASS_TYPE_SOURCE
63 elif isinstance(component_class
, bt2_component
._FilterComponentClassConst
):
64 cc_ptr
= component_class
._ptr
65 add_fn
= native_bt
.bt2_graph_add_filter_component
66 cc_type
= native_bt
.COMPONENT_CLASS_TYPE_FILTER
67 elif isinstance(component_class
, bt2_component
._SinkComponentClassConst
):
68 cc_ptr
= component_class
._ptr
69 add_fn
= native_bt
.bt2_graph_add_sink_component
70 cc_type
= native_bt
.COMPONENT_CLASS_TYPE_SINK
71 elif issubclass(component_class
, bt2_component
._UserSourceComponent
):
72 cc_ptr
= component_class
._bt
_cc
_ptr
73 add_fn
= native_bt
.bt2_graph_add_source_component
74 cc_type
= native_bt
.COMPONENT_CLASS_TYPE_SOURCE
75 elif issubclass(component_class
, bt2_component
._UserSinkComponent
):
76 cc_ptr
= component_class
._bt
_cc
_ptr
77 add_fn
= native_bt
.bt2_graph_add_sink_component
78 cc_type
= native_bt
.COMPONENT_CLASS_TYPE_SINK
79 elif issubclass(component_class
, bt2_component
._UserFilterComponent
):
80 cc_ptr
= component_class
._bt
_cc
_ptr
81 add_fn
= native_bt
.bt2_graph_add_filter_component
82 cc_type
= native_bt
.COMPONENT_CLASS_TYPE_FILTER
85 "'{}' is not a component class".format(
86 component_class
.__class
__.__name
__
90 utils
._check
_str
(name
)
91 utils
._check
_log
_level
(logging_level
)
92 base_cc_ptr
= component_class
._bt
_component
_class
_ptr
()
94 if obj
is not None and not native_bt
.bt2_is_python_component_class(base_cc_ptr
):
95 raise ValueError("cannot pass a Python object to a non-Python component")
97 if params
is not None and not isinstance(params
, (dict, bt2
.MapValue
)):
98 raise TypeError("'params' parameter is not a 'dict' or a 'bt2.MapValue'.")
100 params
= bt2
.create_value(params
)
102 params_ptr
= params
._ptr
if params
is not None else None
104 status
, comp_ptr
= add_fn(
105 self
._ptr
, cc_ptr
, name
, params_ptr
, obj
, logging_level
107 utils
._handle
_func
_status
(status
, "cannot add component to graph")
109 return bt2_component
._create
_component
_from
_const
_ptr
_and
_get
_ref
(
113 def connect_ports(self
, upstream_port
, downstream_port
):
114 utils
._check
_type
(upstream_port
, bt2_port
._OutputPortConst
)
115 utils
._check
_type
(downstream_port
, bt2_port
._InputPortConst
)
116 status
, conn_ptr
= native_bt
.graph_connect_ports(
117 self
._ptr
, upstream_port
._ptr
, downstream_port
._ptr
119 utils
._handle
_func
_status
(status
, "cannot connect component ports within graph")
121 return bt2_connection
._ConnectionConst
._create
_from
_ptr
_and
_get
_ref
(conn_ptr
)
123 def add_port_added_listener(self
, listener
):
124 if not callable(listener
):
125 raise TypeError("'listener' parameter is not callable")
127 fn
= native_bt
.bt2_graph_add_port_added_listener
128 listener_from_native
= functools
.partial(
129 _graph_port_added_listener_from_native
, listener
132 listener_ids
= fn(self
._ptr
, listener_from_native
)
133 if listener_ids
is None:
134 raise bt2
._Error("cannot add listener to graph object")
136 # keep the partial's reference
137 self
._listener
_partials
.append(listener_from_native
)
140 status
= native_bt
.graph_run_once(self
._ptr
)
141 utils
._handle
_func
_status
(status
, "graph object could not run once")
144 status
= native_bt
.graph_run(self
._ptr
)
145 utils
._handle
_func
_status
(status
, "graph object stopped running")
147 def add_interrupter(self
, interrupter
):
148 utils
._check
_type
(interrupter
, bt2_interrupter
.Interrupter
)
149 native_bt
.graph_add_interrupter(self
._ptr
, interrupter
._ptr
)
152 def default_interrupter(self
):
153 ptr
= native_bt
.graph_borrow_default_interrupter(self
._ptr
)
154 return bt2_interrupter
.Interrupter
._create
_from
_ptr
_and
_get
_ref
(ptr
)