[DO NOT SUBMIT] AudioWorklet FS2: audio thread

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

 /*
  * Copyright (C) 2012 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:
  *
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
  * 2.  Redistributions in binary form must reproduce the above copyright
@@ skipping 12 matching lines @@
  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
  * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
 #include "platform/audio/AudioPullFIFO.h"
 
 namespace blink {
 
-AudioPullFIFO::AudioPullFIFO(AudioSourceProvider& audioProvider, unsigned numberOfChannels, size_t fifoLength, size_t providerSize)
-    : m_provider(audioProvider)
-    , m_fifo(numberOfChannels, fifoLength)
-    , m_providerSize(providerSize)
-    , m_tempBus(AudioBus::create(numberOfChannels, providerSize))
+AudioPullFIFO::AudioPullFIFO(unsigned numberOfChannels, size_t fifoBufferLength, AudioSourceProvider& provider, size_t providerRenderBlockSize)
+    : m_providerRenderBlockSize(providerRenderBlockSize)
+    , m_provider(provider)
+    , m_tempBus(AudioBus::create(numberOfChannels, providerRenderBlockSize))
+    , m_fifo(numberOfChannels, fifoBufferLength)
 {
 }
 
 void AudioPullFIFO::consume(AudioBus* destination, size_t framesToConsume)
 {
     if (!destination)
         return;
 
-    if (framesToConsume > m_fifo.framesInFifo()) {
-        // We don't have enough data in the FIFO to fulfill the request. Ask for more data.
-        fillBuffer(framesToConsume - m_fifo.framesInFifo());
-    }
+    // Not enough data in the FIFO to fulfill the request. Ask for more data.
+    if (framesToConsume > m_fifo.framesInFifo())
+        requestDataFromProvider(framesToConsume - m_fifo.framesInFifo());
 
     m_fifo.consume(destination, framesToConsume);
 }
 
-void AudioPullFIFO::fillBuffer(size_t numberOfFrames)
+void AudioPullFIFO::requestDataFromProvider(size_t numberOfFrames)
 {
-    // Keep asking the provider to give us data until we have received at least |numberOfFrames| of
-    // data. Stuff the data into the FIFO.
+    // Keep pulling the provider for more data until we have received at least
+    // |numberOfFrames| of data. Fill the data into the FIFO.
     size_t framesProvided = 0;
 
     while (framesProvided < numberOfFrames) {
-        m_provider.provideInput(m_tempBus.get(), m_providerSize);
-
+        m_provider.provideInput(m_tempBus.get(), m_providerRenderBlockSize);
         m_fifo.push(m_tempBus.get());
-
-        framesProvided += m_providerSize;
+        framesProvided += m_providerRenderBlockSize;
     }
 }
 
 } // namespace blink