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
):
26 _get_ref
= staticmethod(native_bt
.graph_get_ref
)
27 _put_ref
= staticmethod(native_bt
.graph_put_ref
)
29 def __init__(self
, mip_version
=0):
30 utils
._check
_uint
64(mip_version
)
32 if mip_version
> bt2
.get_maximal_mip_version():
33 raise ValueError('unknown MIP version {}'.format(mip_version
))
35 ptr
= native_bt
.graph_create(mip_version
)
38 raise bt2
._MemoryError('cannot create graph object')
42 # list of listener partials to keep a reference as long as
44 self
._listener
_partials
= []
52 logging_level
=bt2_logging
.LoggingLevel
.NONE
,
54 if isinstance(component_class
, bt2_component
._SourceComponentClassConst
):
55 cc_ptr
= component_class
._ptr
56 add_fn
= native_bt
.bt2_graph_add_source_component
57 cc_type
= native_bt
.COMPONENT_CLASS_TYPE_SOURCE
58 elif isinstance(component_class
, bt2_component
._FilterComponentClassConst
):
59 cc_ptr
= component_class
._ptr
60 add_fn
= native_bt
.bt2_graph_add_filter_component
61 cc_type
= native_bt
.COMPONENT_CLASS_TYPE_FILTER
62 elif isinstance(component_class
, bt2_component
._SinkComponentClassConst
):
63 cc_ptr
= component_class
._ptr
64 add_fn
= native_bt
.bt2_graph_add_sink_component
65 cc_type
= native_bt
.COMPONENT_CLASS_TYPE_SINK
66 elif issubclass(component_class
, bt2_component
._UserSourceComponent
):
67 cc_ptr
= component_class
._bt
_cc
_ptr
68 add_fn
= native_bt
.bt2_graph_add_source_component
69 cc_type
= native_bt
.COMPONENT_CLASS_TYPE_SOURCE
70 elif issubclass(component_class
, bt2_component
._UserSinkComponent
):
71 cc_ptr
= component_class
._bt
_cc
_ptr
72 add_fn
= native_bt
.bt2_graph_add_sink_component
73 cc_type
= native_bt
.COMPONENT_CLASS_TYPE_SINK
74 elif issubclass(component_class
, bt2_component
._UserFilterComponent
):
75 cc_ptr
= component_class
._bt
_cc
_ptr
76 add_fn
= native_bt
.bt2_graph_add_filter_component
77 cc_type
= native_bt
.COMPONENT_CLASS_TYPE_FILTER
80 "'{}' is not a component class".format(
81 component_class
.__class
__.__name
__
85 utils
._check
_str
(name
)
86 utils
._check
_log
_level
(logging_level
)
87 base_cc_ptr
= component_class
._bt
_component
_class
_ptr
()
89 if obj
is not None and not native_bt
.bt2_is_python_component_class(base_cc_ptr
):
90 raise ValueError('cannot pass a Python object to a non-Python component')
92 if params
is not None and not isinstance(params
, (dict, bt2
.MapValue
)):
93 raise TypeError("'params' parameter is not a 'dict' or a 'bt2.MapValue'.")
95 params
= bt2
.create_value(params
)
97 params_ptr
= params
._ptr
if params
is not None else None
99 status
, comp_ptr
= add_fn(
100 self
._ptr
, cc_ptr
, name
, params_ptr
, obj
, logging_level
102 utils
._handle
_func
_status
(status
, 'cannot add component to graph')
104 return bt2_component
._create
_component
_from
_const
_ptr
_and
_get
_ref
(
108 def connect_ports(self
, upstream_port
, downstream_port
):
109 utils
._check
_type
(upstream_port
, bt2_port
._OutputPortConst
)
110 utils
._check
_type
(downstream_port
, bt2_port
._InputPortConst
)
111 status
, conn_ptr
= native_bt
.graph_connect_ports(
112 self
._ptr
, upstream_port
._ptr
, downstream_port
._ptr
114 utils
._handle
_func
_status
(status
, 'cannot connect component ports within graph')
116 return bt2_connection
._ConnectionConst
._create
_from
_ptr
_and
_get
_ref
(conn_ptr
)
118 def add_port_added_listener(self
, listener
):
119 if not callable(listener
):
120 raise TypeError("'listener' parameter is not callable")
122 fn
= native_bt
.bt2_graph_add_port_added_listener
123 listener_from_native
= functools
.partial(
124 _graph_port_added_listener_from_native
, listener
127 listener_ids
= fn(self
._ptr
, listener_from_native
)
128 if listener_ids
is None:
129 raise bt2
._Error('cannot add listener to graph object')
131 # keep the partial's reference
132 self
._listener
_partials
.append(listener_from_native
)
135 status
= native_bt
.graph_run_once(self
._ptr
)
136 utils
._handle
_func
_status
(status
, 'graph object could not run once')
139 status
= native_bt
.graph_run(self
._ptr
)
140 utils
._handle
_func
_status
(status
, 'graph object stopped running')
142 def add_interrupter(self
, interrupter
):
143 utils
._check
_type
(interrupter
, bt2_interrupter
.Interrupter
)
144 native_bt
.graph_add_interrupter(self
._ptr
, interrupter
._ptr
)
147 def default_interrupter(self
):
148 ptr
= native_bt
.graph_borrow_default_interrupter(self
._ptr
)
149 return bt2_interrupter
.Interrupter
._create
_from
_ptr
_and
_get
_ref
(ptr
)