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1 | # The MIT License (MIT) |
2 | # | |
3 | # Copyright (c) 2017 Philippe Proulx <pproulx@efficios.com> | |
4 | # | |
5 | # Permission is hereby granted, free of charge, to any person obtaining a copy | |
6 | # of this software and associated documentation files (the "Software"), to deal | |
7 | # in the Software without restriction, including without limitation the rights | |
8 | # to use, copy, modify, merge, publish, distribute, sublicense, and/or sell | |
9 | # copies of the Software, and to permit persons to whom the Software is | |
10 | # furnished to do so, subject to the following conditions: | |
11 | # | |
12 | # The above copyright notice and this permission notice shall be included in | |
13 | # all copies or substantial portions of the Software. | |
14 | # | |
15 | # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
16 | # IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
17 | # FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE | |
18 | # AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER | |
19 | # LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | |
20 | # OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN | |
21 | # THE SOFTWARE. | |
22 | ||
23 | from bt2 import native_bt, object, utils | |
24 | import bt2.connection | |
25 | import bt2.component | |
26 | import functools | |
27 | import bt2.port | |
28 | import bt2 | |
29 | ||
30 | ||
31 | class GraphListenerType: | |
32 | PORT_ADDED = 0 | |
33 | PORT_REMOVED = 1 | |
34 | PORTS_CONNECTED = 2 | |
35 | PORTS_DISCONNECTED = 3 | |
36 | ||
37 | ||
38 | def _graph_port_added_listener_from_native(user_listener, port_ptr): | |
39 | try: | |
40 | port = bt2.port._create_from_ptr(port_ptr) | |
41 | port._get() | |
42 | user_listener(port) | |
43 | except: | |
44 | pass | |
45 | ||
46 | ||
47 | def _graph_port_removed_listener_from_native(user_listener, port_ptr): | |
48 | try: | |
49 | port = bt2.port._create_from_ptr(port_ptr) | |
50 | port._get() | |
51 | user_listener(port) | |
52 | except: | |
53 | pass | |
54 | ||
55 | ||
56 | def _graph_ports_connected_listener_from_native(user_listener, | |
57 | upstream_port_ptr, | |
58 | downstream_port_ptr): | |
59 | try: | |
60 | upstream_port = bt2.port._create_from_ptr(upstream_port_ptr) | |
61 | upstream_port._get() | |
62 | downstream_port = bt2.port._create_from_ptr(downstream_port_ptr) | |
63 | downstream_port._get() | |
64 | user_listener(upstream_port, downstream_port) | |
65 | except: | |
66 | pass | |
67 | ||
68 | ||
69 | def _graph_ports_disconnected_listener_from_native(user_listener, | |
70 | upstream_comp_ptr, | |
71 | downstream_comp_ptr, | |
72 | upstream_port_ptr, | |
73 | downstream_port_ptr): | |
74 | try: | |
75 | upstream_comp = bt2.component._create_generic_component_from_ptr(upstream_comp_ptr) | |
76 | upstream_comp._get() | |
77 | downstream_comp = bt2.component._create_generic_component_from_ptr(downstream_comp_ptr) | |
78 | downstream_comp._get() | |
79 | upstream_port = bt2.port._create_from_ptr(upstream_port_ptr) | |
80 | upstream_port._get() | |
81 | downstream_port = bt2.port._create_from_ptr(downstream_port_ptr) | |
82 | downstream_port._get() | |
83 | user_listener(upstream_comp, downstream_comp, upstream_port, | |
84 | downstream_port) | |
85 | except: | |
86 | pass | |
87 | ||
88 | ||
c3044a97 | 89 | class Graph(object._SharedObject): |
a49e2cc3 PP |
90 | _get_ref = staticmethod(native_bt.graph_get_ref) |
91 | _put_ref = staticmethod(native_bt.graph_put_ref) | |
bbb3650f | 92 | |
f6a5e476 PP |
93 | def __init__(self): |
94 | ptr = native_bt.graph_create() | |
95 | ||
96 | if ptr is None: | |
97 | raise bt2.CreationError('cannot create graph object') | |
98 | ||
99 | super().__init__(ptr) | |
100 | ||
101 | def _handle_status(self, status, gen_error_msg): | |
102 | if status == native_bt.GRAPH_STATUS_COMPONENT_REFUSES_PORT_CONNECTION: | |
103 | raise bt2.PortConnectionRefused | |
104 | elif status == native_bt.GRAPH_STATUS_CANCELED: | |
105 | raise bt2.GraphCanceled | |
106 | elif status == native_bt.GRAPH_STATUS_END: | |
107 | raise bt2.Stop | |
108 | elif status == native_bt.GRAPH_STATUS_AGAIN: | |
109 | raise bt2.TryAgain | |
f6a5e476 PP |
110 | elif status < 0: |
111 | raise bt2.Error(gen_error_msg) | |
112 | ||
bbb3650f SM |
113 | def add_sink_component(self, component_class, name, params=None): |
114 | if issubclass(component_class, bt2.component._UserSinkComponent): | |
f6a5e476 PP |
115 | cc_ptr = component_class._cc_ptr |
116 | else: | |
bbb3650f SM |
117 | raise TypeError("'{}' is not a sink component class".format( |
118 | component_class.__class__.__name__)) | |
f6a5e476 PP |
119 | |
120 | utils._check_str(name) | |
121 | params = bt2.create_value(params) | |
122 | ||
bbb3650f | 123 | params_ptr = params._ptr if params is not None else None |
f6a5e476 | 124 | |
bbb3650f SM |
125 | status, comp_ptr = native_bt.graph_add_sink_component(self._ptr, cc_ptr, |
126 | name, params_ptr) | |
127 | self._handle_status(status, 'cannot add sink component to graph') | |
f6a5e476 | 128 | assert(comp_ptr) |
bbb3650f | 129 | return bt2.component._create_component_from_ptr(comp_ptr, native_bt.COMPONENT_CLASS_TYPE_SINK) |
f6a5e476 PP |
130 | |
131 | def connect_ports(self, upstream_port, downstream_port): | |
132 | utils._check_type(upstream_port, bt2.port._OutputPort) | |
133 | utils._check_type(downstream_port, bt2.port._InputPort) | |
134 | status, conn_ptr = native_bt.graph_connect_ports(self._ptr, | |
135 | upstream_port._ptr, | |
136 | downstream_port._ptr) | |
137 | self._handle_status(status, 'cannot connect component ports within graph') | |
138 | assert(conn_ptr) | |
139 | return bt2.connection._Connection._create_from_ptr(conn_ptr) | |
140 | ||
141 | def add_listener(self, listener_type, listener): | |
142 | if not hasattr(listener, '__call__'): | |
143 | raise TypeError("'listener' parameter is not callable") | |
144 | ||
145 | if listener_type == GraphListenerType.PORT_ADDED: | |
146 | fn = native_bt.py3_graph_add_port_added_listener | |
147 | listener_from_native = functools.partial(_graph_port_added_listener_from_native, | |
148 | listener) | |
149 | elif listener_type == GraphListenerType.PORT_REMOVED: | |
150 | fn = native_bt.py3_graph_add_port_removed_listener | |
151 | listener_from_native = functools.partial(_graph_port_removed_listener_from_native, | |
152 | listener) | |
153 | elif listener_type == GraphListenerType.PORTS_CONNECTED: | |
154 | fn = native_bt.py3_graph_add_ports_connected_listener | |
155 | listener_from_native = functools.partial(_graph_ports_connected_listener_from_native, | |
156 | listener) | |
157 | elif listener_type == GraphListenerType.PORTS_DISCONNECTED: | |
158 | fn = native_bt.py3_graph_add_ports_disconnected_listener | |
159 | listener_from_native = functools.partial(_graph_ports_disconnected_listener_from_native, | |
160 | listener) | |
161 | else: | |
162 | raise TypeError | |
163 | ||
164 | listener_id = fn(self._ptr, listener_from_native) | |
165 | utils._handle_ret(listener_id, 'cannot add listener to graph object') | |
166 | return bt2._ListenerHandle(listener_id, self) | |
167 | ||
168 | def run(self): | |
169 | status = native_bt.graph_run(self._ptr) | |
170 | ||
171 | if status == native_bt.GRAPH_STATUS_END: | |
172 | return | |
173 | ||
174 | self._handle_status(status, 'graph object stopped running because of an unexpected error') | |
175 | ||
176 | def cancel(self): | |
177 | status = native_bt.graph_cancel(self._ptr) | |
178 | self._handle_status(status, 'cannot cancel graph object') | |
179 | ||
180 | @property | |
181 | def is_canceled(self): | |
182 | is_canceled = native_bt.graph_is_canceled(self._ptr) | |
183 | assert(is_canceled >= 0) | |
184 | return is_canceled > 0 | |
185 | ||
186 | def __eq__(self, other): | |
187 | if type(other) is not type(self): | |
188 | return False | |
189 | ||
190 | return self.addr == other.addr |