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| 1 // Copyright 2013 The Chromium Authors. All rights reserved. | 1 // Copyright 2013 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 "media/blink/webaudiosourceprovider_impl.h" | 5 #include "media/blink/webaudiosourceprovider_impl.h" |
| 6 | 6 |
| 7 #include <vector> | 7 #include <vector> |
| 8 | 8 |
| 9 #include "base/bind.h" | 9 #include "base/bind.h" |
| 10 #include "base/bind_to_current_loop.h" |
| 10 #include "base/callback_helpers.h" | 11 #include "base/callback_helpers.h" |
| 11 #include "base/logging.h" | 12 #include "base/logging.h" |
| 12 #include "media/base/bind_to_current_loop.h" | |
| 13 #include "third_party/WebKit/public/platform/WebAudioSourceProviderClient.h" | 13 #include "third_party/WebKit/public/platform/WebAudioSourceProviderClient.h" |
| 14 | 14 |
| 15 using blink::WebVector; | 15 using blink::WebVector; |
| 16 | 16 |
| 17 namespace media { | 17 namespace media { |
| 18 | 18 |
| 19 namespace { | 19 namespace { |
| 20 | 20 |
| 21 // Simple helper class for Try() locks. Lock is Try()'d on construction and | 21 // Simple helper class for Try() locks. Lock is Try()'d on construction and |
| 22 // must be checked via the locked() attribute. If acquisition was successful | 22 // must be checked via the locked() attribute. If acquisition was successful |
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| 63 void WebAudioSourceProviderImpl::setClient( | 63 void WebAudioSourceProviderImpl::setClient( |
| 64 blink::WebAudioSourceProviderClient* client) { | 64 blink::WebAudioSourceProviderClient* client) { |
| 65 base::AutoLock auto_lock(sink_lock_); | 65 base::AutoLock auto_lock(sink_lock_); |
| 66 if (client && client != client_) { | 66 if (client && client != client_) { |
| 67 // Detach the audio renderer from normal playback. | 67 // Detach the audio renderer from normal playback. |
| 68 sink_->Stop(); | 68 sink_->Stop(); |
| 69 | 69 |
| 70 // The client will now take control by calling provideInput() periodically. | 70 // The client will now take control by calling provideInput() periodically. |
| 71 client_ = client; | 71 client_ = client; |
| 72 | 72 |
| 73 set_format_cb_ = BindToCurrentLoop(base::Bind( | 73 set_format_cb_ = base::BindToCurrentLoop(base::Bind( |
| 74 &WebAudioSourceProviderImpl::OnSetFormat, weak_factory_.GetWeakPtr())); | 74 &WebAudioSourceProviderImpl::OnSetFormat, weak_factory_.GetWeakPtr())); |
| 75 | 75 |
| 76 // If |renderer_| is set, then run |set_format_cb_| to send |client_| | 76 // If |renderer_| is set, then run |set_format_cb_| to send |client_| |
| 77 // the current format info. If |renderer_| is not set, then |set_format_cb_| | 77 // the current format info. If |renderer_| is not set, then |set_format_cb_| |
| 78 // will get called when Initialize() is called. | 78 // will get called when Initialize() is called. |
| 79 // Note: Always using |set_format_cb_| ensures we have the same | 79 // Note: Always using |set_format_cb_| ensures we have the same |
| 80 // locking order when calling into |client_|. | 80 // locking order when calling into |client_|. |
| 81 if (renderer_) | 81 if (renderer_) |
| 82 base::ResetAndReturn(&set_format_cb_).Run(); | 82 base::ResetAndReturn(&set_format_cb_).Run(); |
| 83 } else if (!client && client_) { | 83 } else if (!client && client_) { |
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| 184 void WebAudioSourceProviderImpl::OnSetFormat() { | 184 void WebAudioSourceProviderImpl::OnSetFormat() { |
| 185 base::AutoLock auto_lock(sink_lock_); | 185 base::AutoLock auto_lock(sink_lock_); |
| 186 if (!client_) | 186 if (!client_) |
| 187 return; | 187 return; |
| 188 | 188 |
| 189 // Inform Blink about the audio stream format. | 189 // Inform Blink about the audio stream format. |
| 190 client_->setFormat(channels_, sample_rate_); | 190 client_->setFormat(channels_, sample_rate_); |
| 191 } | 191 } |
| 192 | 192 |
| 193 } // namespace media | 193 } // namespace media |
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