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1 // Copyright 2014 The Chromium Authors. All rights reserved. | |
2 // Use of this source code is governed by a BSD-style license that can be | |
3 // found in the LICENSE file. | |
4 | |
5 #include "chromecast/media/cma/backend/media_component_device.h" | |
6 | |
7 #include "base/logging.h" | |
8 | |
9 namespace chromecast { | |
10 namespace media { | |
11 | |
12 MediaComponentDevice::Client::Client() { | |
13 } | |
14 | |
15 MediaComponentDevice::Client::~Client() { | |
16 } | |
17 | |
18 MediaComponentDevice::MediaComponentDevice() { | |
19 } | |
20 | |
21 MediaComponentDevice::~MediaComponentDevice() { | |
22 } | |
23 | |
24 // static | |
25 bool MediaComponentDevice::IsValidStateTransition(State state1, State state2) { | |
26 if (state2 == state1) | |
27 return true; | |
28 | |
29 // All states can transition to |kStateError|. | |
30 bool is_transition_valid = (state2 == kStateError); | |
31 | |
32 // All the other valid FSM transitions. | |
33 is_transition_valid = is_transition_valid || | |
34 (state1 == kStateUninitialized && (state2 == kStateIdle)) || | |
35 (state1 == kStateIdle && (state2 == kStateRunning || | |
36 state2 == kStatePaused || | |
37 state2 == kStateUninitialized)) || | |
38 (state1 == kStatePaused && (state2 == kStateIdle || | |
39 state2 == kStateRunning)) || | |
40 (state1 == kStateRunning && (state2 == kStateIdle || | |
41 state2 == kStatePaused)) || | |
42 (state1 == kStateError && (state2 == kStateUninitialized)); | |
43 | |
44 return is_transition_valid; | |
45 } | |
46 | |
47 // static | |
48 std::string MediaComponentDevice::StateToString(const State& state) { | |
49 switch (state) { | |
50 case kStateUninitialized: | |
51 return "Uninitialized"; | |
52 case kStateIdle: | |
53 return "Idle"; | |
54 case kStateRunning: | |
55 return "Running"; | |
56 case kStatePaused: | |
57 return "Paused"; | |
58 case kStateError: | |
59 return "Error"; | |
60 default: | |
61 NOTREACHED() << "Unknown MediaComponentDevice::State: " << state; | |
62 return ""; | |
63 } | |
64 } | |
65 | |
66 } // namespace media | |
67 } // namespace chromecast | |
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