Implement renderer AudioDevice API for low-latency audio output...

webkit/glue/webkitclient_impl.h

 // Copyright (c) 2010 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef WEBKIT_CLIENT_IMPL_H_
 #define WEBKIT_CLIENT_IMPL_H_
 
 #include "base/platform_file.h"
 #include "base/timer.h"
 #include "third_party/WebKit/WebKit/chromium/public/WebKitClient.h"
@@ skipping 23 matching lines @@
   virtual int databaseDeleteFile(const WebKit::WebString& vfs_file_name,
                                  bool sync_dir);
   virtual long databaseGetFileAttributes(
       const WebKit::WebString& vfs_file_name);
   virtual long long databaseGetFileSize(const WebKit::WebString& vfs_file_name);
   virtual WebKit::WebString signedPublicKeyAndChallengeString(
       unsigned key_size_index, const WebKit::WebString& challenge,
       const WebKit::WebURL& url);
   virtual size_t memoryUsageMB();
   virtual size_t actualMemoryUsageMB();
+  virtual WebKit::WebAudioDevice* createAudioDevice(
+      size_t buffer_size, unsigned channels, double sample_rate,

[scherkus (not reviewing), 2011/01/12 03:11:43]

nit: unsigned -> int

[Chris Rogers, 2011/01/12 21:26:10]

This one I can't easily change since the base class has already been landed in
WebKit and we must override with the same signature.

On 2011/01/12 03:11:43, scherkus wrote:

+      WebKit::WebAudioDevice::RenderCallback* callback);
   virtual WebKit::WebURLLoader* createURLLoader();
   virtual WebKit::WebSocketStreamHandle* createSocketStreamHandle();
   virtual WebKit::WebString userAgent(const WebKit::WebURL& url);
   virtual void getPluginList(bool refresh, WebKit::WebPluginListBuilder*);
   virtual void decrementStatsCounter(const char* name);
   virtual void incrementStatsCounter(const char* name);
   virtual void histogramCustomCounts(
     const char* name, int sample, int min, int max, int bucket_count);
   virtual void histogramEnumeration(
     const char* name, int sample, int boundary_value);
@@ skipping 11 matching lines @@
       WebKit::WebLocalizedString::Name name, const WebKit::WebString& value);
   virtual WebKit::WebString queryLocalizedString(
       WebKit::WebLocalizedString::Name name,
       const WebKit::WebString& value1, const WebKit::WebString& value2);
   virtual void suddenTerminationChanged(bool enabled) { }
   virtual double currentTime();
   virtual void setSharedTimerFiredFunction(void (*func)());
   virtual void setSharedTimerFireTime(double fireTime);
   virtual void stopSharedTimer();
   virtual void callOnMainThread(void (*func)(void*), void* context);
 

[scherkus (not reviewing), 2011/01/12 03:11:43]

nit: remove blank line

[Chris Rogers, 2011/01/12 21:26:10]

Done.

+
   void SuspendSharedTimer();
   void ResumeSharedTimer();
 
  private:
   void DoTimeout() {
     if (shared_timer_func_ && !shared_timer_suspended_)
       shared_timer_func_();
   }
 
   MessageLoop* main_loop_;
   base::OneShotTimer<WebKitClientImpl> shared_timer_;
   void (*shared_timer_func_)();
   double shared_timer_fire_time_;
   int shared_timer_suspended_;  // counter
 
 #if defined(OS_WIN) || defined(OS_LINUX) || defined(OS_MACOSX)
   WebThemeEngineImpl theme_engine_;
 #endif
 };
 
 }  // namespace webkit_glue
 
 #endif  // WEBKIT_CLIENT_IMPL_H_