AudioParams with automations must process timelines

third_party/WebKit/Source/platform/audio/AudioDSPKernelProcessor.cpp

 /*
  * Copyright (C) 2010 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 78 matching lines @@
       m_kernels[i]->process(source->channel(i)->data(),
                             destination->channel(i)->mutableData(),
                             framesToProcess);
   } else {
     // Unfortunately, the kernel is being processed by another thread.
     // See also ConvolverNode::process().
     destination->zero();
   }
 }
 
+void AudioDSPKernelProcessor::processOnlyAudioParams(size_t framesToProcess) {
+  if (!isInitialized())
+    return;
+
+  MutexTryLocker tryLocker(m_processLock);
+  // Only update the AudioParams if we can get the lock.  If not, some
+  // other thread is updating the kernels, so we'll have to skip it
+  // this time.
+  if (tryLocker.locked()) {
+    for (unsigned i = 0; i < m_kernels.size(); ++i)
+      m_kernels[i]->processOnlyAudioParams(framesToProcess);
+  }
+}
+
 // Resets filter state
 void AudioDSPKernelProcessor::reset() {
   ASSERT(isMainThread());
   if (!isInitialized())
     return;
 
   // Forces snap to parameter values - first time.
   // Any processing depending on this value must set it to false at the
   // appropriate time.
   m_hasJustReset = true;
@@ skipping 30 matching lines @@
   if (tryLocker.locked()) {
     // It is expected that all the kernels have the same latencyTime.
     return !m_kernels.isEmpty() ? m_kernels.front()->latencyTime() : 0;
   }
   // Since we don't want to block the Audio Device thread, we return a large
   // value instead of trying to acquire the lock.
   return std::numeric_limits<double>::infinity();
 }
 
 }  // namespace blink