Implement AudioWorkletProcessor interface

third_party/WebKit/Source/modules/webaudio/AudioWorkletGlobalScopeTest.cpp

Index: third_party/WebKit/Source/modules/webaudio/AudioWorkletGlobalScopeTest.cpp
diff --git a/third_party/WebKit/Source/modules/webaudio/AudioWorkletGlobalScopeTest.cpp b/third_party/WebKit/Source/modules/webaudio/AudioWorkletGlobalScopeTest.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..351ce67bef3b85a619b954913a96deb71c1c7bdd
--- /dev/null
+++ b/third_party/WebKit/Source/modules/webaudio/AudioWorkletGlobalScopeTest.cpp
@@ -0,0 +1,291 @@
+// Copyright 2017 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.
+
+#include "modules/webaudio/AudioWorkletGlobalScope.h"
+
+#include "bindings/core/v8/ScriptSourceCode.h"
+#include "bindings/core/v8/ScriptState.h"
+#include "bindings/core/v8/ScriptValue.h"
+#include "bindings/core/v8/SourceLocation.h"
+#include "bindings/core/v8/ToV8.h"
+#include "bindings/core/v8/V8Binding.h"
+#include "bindings/core/v8/V8BindingForTesting.h"
+#include "bindings/core/v8/V8BindingMacros.h"
+#include "bindings/core/v8/V8GCController.h"
+#include "bindings/core/v8/V8ObjectConstructor.h"
+#include "bindings/core/v8/WorkerOrWorkletScriptController.h"
+#include "core/workers/WorkerBackingThread.h"
+#include "core/workers/WorkerReportingProxy.h"
+#include "core/workers/WorkerThreadStartupData.h"
+#include "modules/webaudio/AudioBuffer.h"
+#include "modules/webaudio/AudioWorkletProcessor.h"
+#include "modules/webaudio/AudioWorkletProcessorDefinition.h"
+#include "modules/webaudio/AudioWorkletThread.h"
+#include "platform/weborigin/SecurityOrigin.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace blink {
+
+namespace {
+
+static const size_t kRenderQuantumFrames = 128;
+
+// This is a typical sample rate.
+static const float kTestingSampleRate = 44100;
+
+// A null WorkerReportingProxy, supplied when creating AudioWorkletThreads.
+class TestAudioWorkletReportingProxy : public WorkerReportingProxy {
+ public:
+  static std::unique_ptr<TestAudioWorkletReportingProxy> create() {
+    return WTF::wrapUnique(new TestAudioWorkletReportingProxy());
+  }
+
+  // (Empty) WorkerReportingProxy implementation:
+  void countFeature(UseCounter::Feature) override {}
+  void countDeprecation(UseCounter::Feature) override {}
+  void reportException(const String& errorMessage,
+                       std::unique_ptr<SourceLocation>,
+                       int exceptionId) override {}
+  void reportConsoleMessage(MessageSource,
+                            MessageLevel,
+                            const String& message,
+                            SourceLocation*) override {}
+  void postMessageToPageInspector(const String&) override {}
+  void didEvaluateWorkerScript(bool success) override {}
+  void didCloseWorkerGlobalScope() override {}
+  void willDestroyWorkerGlobalScope() override {}
+  void didTerminateWorkerThread() override {}
+
+ private:
+  TestAudioWorkletReportingProxy() {}
+};
+
+}  // namespace
+
+class AudioWorkletGlobalScopeTest : public ::testing::Test {
+ public:
+  void SetUp() override {
+    AudioWorkletThread::createSharedBackingThreadForTest();
+    m_reportingProxy = TestAudioWorkletReportingProxy::create();
+    m_securityOrigin =
+        SecurityOrigin::create(KURL(ParsedURLString, "http://fake.url/"));
+  }
+
+  void TearDown() override { AudioWorkletThread::clearSharedBackingThread(); }
+
+  std::unique_ptr<AudioWorkletThread> createAudioWorkletThread() {
+    std::unique_ptr<AudioWorkletThread> thread =
+        AudioWorkletThread::create(nullptr, *m_reportingProxy);
+    thread->start(
+        WorkerThreadStartupData::create(
+            KURL(ParsedURLString, "http://fake.url/"), "fake user agent", "",
+            nullptr, DontPauseWorkerGlobalScopeOnStart, nullptr, "",
+            m_securityOrigin.get(), nullptr, WebAddressSpaceLocal, nullptr,
+            nullptr, WorkerV8Settings::Default()),
+        ParentFrameTaskRunners::create(nullptr));
+    return thread;
+  }
+
+  void runBasicTest(WorkerThread* thread) {
+    WaitableEvent waitableEvent;
+    thread->postTask(
+        BLINK_FROM_HERE,
+        crossThreadBind(
+            &AudioWorkletGlobalScopeTest::runBasicTestOnWorkletThread,
+            crossThreadUnretained(this), crossThreadUnretained(thread),
+            crossThreadUnretained(&waitableEvent)));
+    waitableEvent.wait();
+  }
+
+  void runSimpleProcessTest(WorkerThread* thread) {
+    WaitableEvent waitableEvent;
+    thread->postTask(
+        BLINK_FROM_HERE,
+        crossThreadBind(
+            &AudioWorkletGlobalScopeTest::runSimpleProcessTestOnWorkletThread,
+            crossThreadUnretained(this), crossThreadUnretained(thread),
+            crossThreadUnretained(&waitableEvent)));
+    waitableEvent.wait();
+  }
+
+  void runParsingTest(WorkerThread* thread) {
+    WaitableEvent waitableEvent;
+    thread->postTask(
+        BLINK_FROM_HERE,
+        crossThreadBind(
+            &AudioWorkletGlobalScopeTest::runParsingTestOnWorkletThread,
+            crossThreadUnretained(this), crossThreadUnretained(thread),
+            crossThreadUnretained(&waitableEvent)));
+    waitableEvent.wait();
+  }
+
+ private:
+  // Test if AudioWorkletGlobalScope and V8 components (ScriptState, Isolate)
+  // are properly instantiated. Runs a simple processor registration and check
+  // if the class definition is correctly registered, then instantiate an
+  // AudioWorkletProcessor instance from the definition.
+  void runBasicTestOnWorkletThread(WorkerThread* thread,
+                                   WaitableEvent* waitEvent) {
+    EXPECT_TRUE(thread->isCurrentThread());
+
+    AudioWorkletGlobalScope* globalScope =
+        static_cast<AudioWorkletGlobalScope*>(thread->globalScope());
+    EXPECT_TRUE(globalScope);
+    EXPECT_TRUE(globalScope->isAudioWorkletGlobalScope());
+
+    ScriptState* scriptState =
+        globalScope->scriptController()->getScriptState();
+    EXPECT_TRUE(scriptState);
+
+    v8::Isolate* isolate = scriptState->isolate();
+    EXPECT_TRUE(isolate);
+
+    ScriptState::Scope scope(scriptState);
+
+    globalScope->scriptController()->evaluate(ScriptSourceCode(
+        R"JS(
+          registerProcessor('testProcessor', class {
+              constructor () {}
+              process () {}
+            });
+          )JS"));
+
+    AudioWorkletProcessorDefinition* definition =
+        globalScope->findDefinition("testProcessor");
+    EXPECT_TRUE(definition);
+    EXPECT_EQ(definition->name(), "testProcessor");
+    EXPECT_TRUE(definition->constructorLocal(isolate)->IsFunction());
+    EXPECT_TRUE(definition->processLocal(isolate)->IsFunction());
+
+    AudioWorkletProcessor* processor =
+        globalScope->createInstance("testProcessor");
+    EXPECT_TRUE(processor);
+    EXPECT_EQ(processor->name(), "testProcessor");
+    EXPECT_TRUE(processor->instanceLocal(isolate)->IsObject());
+
+    waitEvent->signal();
+  }
+
+  // Test if various class definition patterns are parsed correctly.
+  void runParsingTestOnWorkletThread(WorkerThread* thread,
+                                     WaitableEvent* waitEvent) {
+    EXPECT_TRUE(thread->isCurrentThread());
+
+    AudioWorkletGlobalScope* globalScope =
+        static_cast<AudioWorkletGlobalScope*>(thread->globalScope());
+    ScriptState* scriptState =
+        globalScope->scriptController()->getScriptState();
+
+    ScriptState::Scope scope(scriptState);
+
+    globalScope->scriptController()->evaluate(ScriptSourceCode(
+        R"JS(
+          var class1 = function () {};
+          class1.prototype.process = function () {};
+          registerProcessor('class1', class1);
+
+          var class2 = function () {};
+          class2.prototype = { process: function () {} };
+          registerProcessor('class2', class2);
+
+          var class3 = function () {};
+          Object.defineProperty(class3, 'prototype', {
+              get: function () {
+                return {
+                  process: function () {}
+                };
+              }
+            });
+          registerProcessor('class3', class3);
+        )JS"));
+
+    EXPECT_TRUE(globalScope->findDefinition("class1"));
+    EXPECT_TRUE(globalScope->findDefinition("class2"));
+    EXPECT_FALSE(globalScope->findDefinition("class3"));
+
+    waitEvent->signal();
+  }
+
+  // Test if the invocation of process() method in AudioWorkletProcessor and
+  // AudioWorkletGlobalScope is performed correctly.
+  void runSimpleProcessTestOnWorkletThread(WorkerThread* thread,
+                                           WaitableEvent* waitEvent) {
+    EXPECT_TRUE(thread->isCurrentThread());
+
+    AudioWorkletGlobalScope* globalScope =
+        static_cast<AudioWorkletGlobalScope*>(thread->globalScope());
+    ScriptState* scriptState =
+        globalScope->scriptController()->getScriptState();
+
+    ScriptState::Scope scope(scriptState);
+
+    globalScope->scriptController()->evaluate(ScriptSourceCode(
+        R"JS(
+          registerProcessor('testProcessor', class {
+              constructor () {
+                this.constant = 1;
+              }
+              process (input, output) {
+                let inputChannelData = input.getChannelData(0);
+                let outputChannelData = output.getChannelData(0);
+                for (let i = 0; i < input.length; ++i) {
+                  outputChannelData[i] = inputChannelData[i] + this.constant;
+                }
+              }
+            }
+          )
+        )JS"));
+
+    AudioWorkletProcessor* processor =
+        globalScope->createInstance("testProcessor");
+    EXPECT_TRUE(processor);
+
+    AudioBuffer* inputBuffer =
+        AudioBuffer::create(1, kRenderQuantumFrames, kTestingSampleRate);
+    AudioBuffer* outputBuffer =
+        AudioBuffer::create(1, kRenderQuantumFrames, kTestingSampleRate);
+    DOMFloat32Array* inputChannelData = inputBuffer->getChannelData(0);
+    float* inputArrayData = inputChannelData->data();
+    EXPECT_TRUE(inputArrayData);
+    DOMFloat32Array* outputChannelData = outputBuffer->getChannelData(0);
+    float* outputArrayData = outputChannelData->data();
+    EXPECT_TRUE(outputArrayData);
+
+    // Fill |inputBuffer| with 1 and zero out |outputBuffer|.
+    std::fill(inputArrayData, inputArrayData + inputBuffer->length(), 1);
+    outputBuffer->zero();
+
+    // Then invoke the process() method to perform JS buffer manipulation. The
+    // output buffer should contain a constant value of 2.
+    processor->process(inputBuffer, outputBuffer);
+    for (unsigned i = 0; i < outputBuffer->length(); ++i) {
+      EXPECT_EQ(outputArrayData[i], 2);
+    }
+
+    waitEvent->signal();
+  }
+
+  RefPtr<SecurityOrigin> m_securityOrigin;
+  std::unique_ptr<WorkerReportingProxy> m_reportingProxy;
+};
+
+TEST_F(AudioWorkletGlobalScopeTest, Basic) {
+  std::unique_ptr<AudioWorkletThread> thread = createAudioWorkletThread();
+  runBasicTest(thread.get());
+  thread->terminateAndWait();
+}
+
+TEST_F(AudioWorkletGlobalScopeTest, Parsing) {
+  std::unique_ptr<AudioWorkletThread> thread = createAudioWorkletThread();
+  runParsingTest(thread.get());
+  thread->terminateAndWait();
+}
+
+TEST_F(AudioWorkletGlobalScopeTest, BufferProcessing) {
+  std::unique_ptr<AudioWorkletThread> thread = createAudioWorkletThread();
+  runSimpleProcessTest(thread.get());
+  thread->terminateAndWait();
+}
+
+}  // namespace blink