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1 // Copyright 2015 The Chromium Authors. All rights reserved. | 1 // Copyright 2015 The Chromium Authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #include "modules/webaudio/AudioContext.h" | 5 #include "modules/webaudio/AudioContext.h" |
6 | 6 |
7 #include "bindings/core/v8/ExceptionMessages.h" | 7 #include "bindings/core/v8/ExceptionMessages.h" |
8 #include "bindings/core/v8/ExceptionState.h" | 8 #include "bindings/core/v8/ExceptionState.h" |
9 #include "bindings/core/v8/ScriptPromiseResolver.h" | 9 #include "bindings/core/v8/ScriptPromiseResolver.h" |
10 #include "core/dom/DOMException.h" | 10 #include "core/dom/DOMException.h" |
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21 namespace blink { | 21 namespace blink { |
22 | 22 |
23 // Don't allow more than this number of simultaneous AudioContexts | 23 // Don't allow more than this number of simultaneous AudioContexts |
24 // talking to hardware. | 24 // talking to hardware. |
25 const unsigned MaxHardwareContexts = 6; | 25 const unsigned MaxHardwareContexts = 6; |
26 static unsigned s_hardwareContextCount = 0; | 26 static unsigned s_hardwareContextCount = 0; |
27 static unsigned s_contextId = 0; | 27 static unsigned s_contextId = 0; |
28 | 28 |
29 BaseAudioContext* AudioContext::create(Document& document, ExceptionState& excep
tionState) | 29 BaseAudioContext* AudioContext::create(Document& document, ExceptionState& excep
tionState) |
30 { | 30 { |
31 ASSERT(isMainThread()); | 31 DCHECK(isMainThread()); |
32 | 32 |
33 UseCounter::countCrossOriginIframe(document, UseCounter::AudioContextCrossOr
iginIframe); | 33 UseCounter::countCrossOriginIframe(document, UseCounter::AudioContextCrossOr
iginIframe); |
34 | 34 |
35 if (s_hardwareContextCount >= MaxHardwareContexts) { | 35 if (s_hardwareContextCount >= MaxHardwareContexts) { |
36 exceptionState.throwDOMException( | 36 exceptionState.throwDOMException( |
37 NotSupportedError, | 37 NotSupportedError, |
38 ExceptionMessages::indexExceedsMaximumBound( | 38 ExceptionMessages::indexExceedsMaximumBound( |
39 "number of hardware contexts", | 39 "number of hardware contexts", |
40 s_hardwareContextCount, | 40 s_hardwareContextCount, |
41 MaxHardwareContexts)); | 41 MaxHardwareContexts)); |
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95 } | 95 } |
96 | 96 |
97 DEFINE_TRACE(AudioContext) | 97 DEFINE_TRACE(AudioContext) |
98 { | 98 { |
99 visitor->trace(m_closeResolver); | 99 visitor->trace(m_closeResolver); |
100 BaseAudioContext::trace(visitor); | 100 BaseAudioContext::trace(visitor); |
101 } | 101 } |
102 | 102 |
103 ScriptPromise AudioContext::suspendContext(ScriptState* scriptState) | 103 ScriptPromise AudioContext::suspendContext(ScriptState* scriptState) |
104 { | 104 { |
105 ASSERT(isMainThread()); | 105 DCHECK(isMainThread()); |
106 AutoLocker locker(this); | 106 AutoLocker locker(this); |
107 | 107 |
108 ScriptPromiseResolver* resolver = ScriptPromiseResolver::create(scriptState)
; | 108 ScriptPromiseResolver* resolver = ScriptPromiseResolver::create(scriptState)
; |
109 ScriptPromise promise = resolver->promise(); | 109 ScriptPromise promise = resolver->promise(); |
110 | 110 |
111 if (contextState() == Closed) { | 111 if (contextState() == Closed) { |
112 resolver->reject( | 112 resolver->reject( |
113 DOMException::create(InvalidStateError, "Cannot suspend a context th
at has been closed")); | 113 DOMException::create(InvalidStateError, "Cannot suspend a context th
at has been closed")); |
114 } else { | 114 } else { |
115 // Stop rendering now. | 115 // Stop rendering now. |
116 if (destination()) | 116 if (destination()) |
117 stopRendering(); | 117 stopRendering(); |
118 | 118 |
119 // Since we don't have any way of knowing when the hardware actually sto
ps, we'll just | 119 // Since we don't have any way of knowing when the hardware actually sto
ps, we'll just |
120 // resolve the promise now. | 120 // resolve the promise now. |
121 resolver->resolve(); | 121 resolver->resolve(); |
122 } | 122 } |
123 | 123 |
124 return promise; | 124 return promise; |
125 } | 125 } |
126 | 126 |
127 ScriptPromise AudioContext::resumeContext(ScriptState* scriptState) | 127 ScriptPromise AudioContext::resumeContext(ScriptState* scriptState) |
128 { | 128 { |
129 ASSERT(isMainThread()); | 129 DCHECK(isMainThread()); |
130 | 130 |
131 if (isContextClosed()) { | 131 if (isContextClosed()) { |
132 return ScriptPromise::rejectWithDOMException( | 132 return ScriptPromise::rejectWithDOMException( |
133 scriptState, | 133 scriptState, |
134 DOMException::create( | 134 DOMException::create( |
135 InvalidAccessError, | 135 InvalidAccessError, |
136 "cannot resume a closed AudioContext")); | 136 "cannot resume a closed AudioContext")); |
137 } | 137 } |
138 | 138 |
139 recordUserGestureState(); | 139 recordUserGestureState(); |
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180 | 180 |
181 return promise; | 181 return promise; |
182 } | 182 } |
183 | 183 |
184 void AudioContext::didClose() | 184 void AudioContext::didClose() |
185 { | 185 { |
186 // This is specific to AudioContexts. OfflineAudioContexts | 186 // This is specific to AudioContexts. OfflineAudioContexts |
187 // are closed in their completion event. | 187 // are closed in their completion event. |
188 setContextState(Closed); | 188 setContextState(Closed); |
189 | 189 |
190 ASSERT(s_hardwareContextCount); | 190 DCHECK(s_hardwareContextCount); |
191 --s_hardwareContextCount; | 191 --s_hardwareContextCount; |
192 | 192 |
193 if (m_closeResolver) | 193 if (m_closeResolver) |
194 m_closeResolver->resolve(); | 194 m_closeResolver->resolve(); |
195 } | 195 } |
196 | 196 |
197 bool AudioContext::isContextClosed() const | 197 bool AudioContext::isContextClosed() const |
198 { | 198 { |
199 return m_closeResolver || BaseAudioContext::isContextClosed(); | 199 return m_closeResolver || BaseAudioContext::isContextClosed(); |
200 } | 200 } |
201 | 201 |
202 void AudioContext::stopRendering() | 202 void AudioContext::stopRendering() |
203 { | 203 { |
204 ASSERT(isMainThread()); | 204 DCHECK(isMainThread()); |
205 ASSERT(destination()); | 205 DCHECK(destination()); |
206 | 206 |
207 if (contextState() == Running) { | 207 if (contextState() == Running) { |
208 destination()->audioDestinationHandler().stopRendering(); | 208 destination()->audioDestinationHandler().stopRendering(); |
209 setContextState(Suspended); | 209 setContextState(Suspended); |
210 deferredTaskHandler().clearHandlersToBeDeleted(); | 210 deferredTaskHandler().clearHandlersToBeDeleted(); |
211 } | 211 } |
212 } | 212 } |
213 | 213 |
214 } // namespace blink | 214 } // namespace blink |
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