From 1bf1084f2b10c3b47fd1a588d85d21ed0eb41d0c Mon Sep 17 00:00:00 2001
From: Lorry Tar Creator <lorry-tar-importer@lorry>
Date: Tue, 27 Jun 2017 06:07:23 +0000
Subject: webkitgtk-2.16.5

---
 Source/WebCore/Modules/webaudio/ConvolverNode.cpp | 43 ++++++++++++-----------
 1 file changed, 23 insertions(+), 20 deletions(-)

(limited to 'Source/WebCore/Modules/webaudio/ConvolverNode.cpp')

diff --git a/Source/WebCore/Modules/webaudio/ConvolverNode.cpp b/Source/WebCore/Modules/webaudio/ConvolverNode.cpp
index c5ac5ea52..03e0a009b 100644
--- a/Source/WebCore/Modules/webaudio/ConvolverNode.cpp
+++ b/Source/WebCore/Modules/webaudio/ConvolverNode.cpp
@@ -1,5 +1,6 @@
 /*
  * Copyright (C) 2010, Google Inc. All rights reserved.
+ * Copyright (C) 2016, Apple Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
@@ -28,12 +29,9 @@
 
 #include "ConvolverNode.h"
 
-#include "AudioBuffer.h"
-#include "AudioContext.h"
 #include "AudioNodeInput.h"
 #include "AudioNodeOutput.h"
 #include "Reverb.h"
-#include <wtf/MainThread.h>
 
 // Note about empirical tuning:
 // The maximum FFT size affects reverb performance and accuracy.
@@ -45,9 +43,8 @@ const size_t MaxFFTSize = 32768;
 
 namespace WebCore {
 
-ConvolverNode::ConvolverNode(AudioContext* context, float sampleRate)
+ConvolverNode::ConvolverNode(AudioContext& context, float sampleRate)
     : AudioNode(context, sampleRate)
-    , m_normalize(true)
 {
     addInput(std::make_unique<AudioNodeInput>(this));
     addOutput(std::make_unique<AudioNodeOutput>(this, 2));
@@ -73,7 +70,7 @@ void ConvolverNode::process(size_t framesToProcess)
     ASSERT(outputBus);
 
     // Synchronize with possible dynamic changes to the impulse response.
-    std::unique_lock<std::mutex> lock(m_processMutex, std::try_to_lock);
+    std::unique_lock<Lock> lock(m_processMutex, std::try_to_lock);
     if (!lock.owns_lock()) {
         // Too bad - the try_lock() failed. We must be in the middle of setting a new impulse response.
         outputBus->zero();
@@ -93,7 +90,7 @@ void ConvolverNode::process(size_t framesToProcess)
 
 void ConvolverNode::reset()
 {
-    std::lock_guard<std::mutex> lock(m_processMutex);
+    std::lock_guard<Lock> lock(m_processMutex);
     if (m_reverb)
         m_reverb->reset();
 }
@@ -102,7 +99,7 @@ void ConvolverNode::initialize()
 {
     if (isInitialized())
         return;
-        
+
     AudioNode::initialize();
 }
 
@@ -115,40 +112,46 @@ void ConvolverNode::uninitialize()
     AudioNode::uninitialize();
 }
 
-void ConvolverNode::setBuffer(AudioBuffer* buffer)
+ExceptionOr<void> ConvolverNode::setBuffer(AudioBuffer* buffer)
 {
     ASSERT(isMainThread());
     
     if (!buffer)
-        return;
+        return { };
+
+    if (buffer->sampleRate() != context().sampleRate())
+        return Exception { NOT_SUPPORTED_ERR };
 
     unsigned numberOfChannels = buffer->numberOfChannels();
     size_t bufferLength = buffer->length();
 
-    // The current implementation supports up to four channel impulse responses, which are interpreted as true-stereo (see Reverb class).
-    bool isBufferGood = numberOfChannels > 0 && numberOfChannels <= 4 && bufferLength;
-    ASSERT(isBufferGood);
-    if (!isBufferGood)
-        return;
+    // The current implementation supports only 1-, 2-, or 4-channel impulse responses, with the
+    // 4-channel response being interpreted as true-stereo (see Reverb class).
+    bool isChannelCountGood = (numberOfChannels == 1 || numberOfChannels == 2 || numberOfChannels == 4) && bufferLength;
+
+    if (!isChannelCountGood)
+        return Exception { NOT_SUPPORTED_ERR };
 
     // Wrap the AudioBuffer by an AudioBus. It's an efficient pointer set and not a memcpy().
     // This memory is simply used in the Reverb constructor and no reference to it is kept for later use in that class.
-    RefPtr<AudioBus> bufferBus = AudioBus::create(numberOfChannels, bufferLength, false);
+    auto bufferBus = AudioBus::create(numberOfChannels, bufferLength, false);
     for (unsigned i = 0; i < numberOfChannels; ++i)
-        bufferBus->setChannelMemory(i, buffer->getChannelData(i)->data(), bufferLength);
+        bufferBus->setChannelMemory(i, buffer->channelData(i)->data(), bufferLength);
 
     bufferBus->setSampleRate(buffer->sampleRate());
 
     // Create the reverb with the given impulse response.
-    bool useBackgroundThreads = !context()->isOfflineContext();
+    bool useBackgroundThreads = !context().isOfflineContext();
     auto reverb = std::make_unique<Reverb>(bufferBus.get(), AudioNode::ProcessingSizeInFrames, MaxFFTSize, 2, useBackgroundThreads, m_normalize);
 
     {
         // Synchronize with process().
-        std::lock_guard<std::mutex> lock(m_processMutex);
-        m_reverb = std::move(reverb);
+        std::lock_guard<Lock> lock(m_processMutex);
+        m_reverb = WTFMove(reverb);
         m_buffer = buffer;
     }
+
+    return { };
 }
 
 AudioBuffer* ConvolverNode::buffer()
-- 
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