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| 1 /* | 1 /* |
| 2 * Copyright (C) 2010 Google Inc. All rights reserved. | 2 * Copyright (C) 2010 Google Inc. All rights reserved. |
| 3 * | 3 * |
| 4 * Redistribution and use in source and binary forms, with or without | 4 * Redistribution and use in source and binary forms, with or without |
| 5 * modification, are permitted provided that the following conditions | 5 * modification, are permitted provided that the following conditions |
| 6 * are met: | 6 * are met: |
| 7 * | 7 * |
| 8 * 1. Redistributions of source code must retain the above copyright | 8 * 1. Redistributions of source code must retain the above copyright |
| 9 * notice, this list of conditions and the following disclaimer. | 9 * notice, this list of conditions and the following disclaimer. |
| 10 * 2. Redistributions in binary form must reproduce the above copyright | 10 * 2. Redistributions in binary form must reproduce the above copyright |
| (...skipping 22 matching lines...) Expand all Loading... |
| 33 #include "public/platform/WebThread.h" | 33 #include "public/platform/WebThread.h" |
| 34 #include "wtf/HashMap.h" | 34 #include "wtf/HashMap.h" |
| 35 #include "wtf/RefCounted.h" | 35 #include "wtf/RefCounted.h" |
| 36 #include "wtf/ThreadingPrimitives.h" | 36 #include "wtf/ThreadingPrimitives.h" |
| 37 #include <memory> | 37 #include <memory> |
| 38 | 38 |
| 39 namespace blink { | 39 namespace blink { |
| 40 | 40 |
| 41 class WaitableEvent; | 41 class WaitableEvent; |
| 42 | 42 |
| 43 // HRTFDatabaseLoader will asynchronously load the default HRTFDatabase in a new
thread. | 43 // HRTFDatabaseLoader will asynchronously load the default HRTFDatabase in a new |
| 44 // thread. |
| 44 class PLATFORM_EXPORT HRTFDatabaseLoader final | 45 class PLATFORM_EXPORT HRTFDatabaseLoader final |
| 45 : public RefCounted<HRTFDatabaseLoader> { | 46 : public RefCounted<HRTFDatabaseLoader> { |
| 46 public: | 47 public: |
| 47 // Lazily creates a HRTFDatabaseLoader (if not already created) for the given
sample-rate | 48 // Lazily creates a HRTFDatabaseLoader (if not already created) for the given |
| 48 // and starts loading asynchronously (when created the first time). | 49 // sample-rate and starts loading asynchronously (when created the first |
| 50 // time). |
| 49 // Returns the HRTFDatabaseLoader. | 51 // Returns the HRTFDatabaseLoader. |
| 50 // Must be called from the main thread. | 52 // Must be called from the main thread. |
| 51 static PassRefPtr<HRTFDatabaseLoader> createAndLoadAsynchronouslyIfNecessary( | 53 static PassRefPtr<HRTFDatabaseLoader> createAndLoadAsynchronouslyIfNecessary( |
| 52 float sampleRate); | 54 float sampleRate); |
| 53 | 55 |
| 54 // Both constructor and destructor must be called from the main thread. | 56 // Both constructor and destructor must be called from the main thread. |
| 55 ~HRTFDatabaseLoader(); | 57 ~HRTFDatabaseLoader(); |
| 56 | 58 |
| 57 // Returns true once the default database has been completely loaded. This | 59 // Returns true once the default database has been completely loaded. This |
| 58 // must be called from the audio thread. | 60 // must be called from the audio thread. |
| 59 bool isLoaded() { return database(); } | 61 bool isLoaded() { return database(); } |
| 60 | 62 |
| 61 // waitForLoaderThreadCompletion() may be called more than once and is thread-
safe. | 63 // waitForLoaderThreadCompletion() may be called more than once and is |
| 64 // thread-safe. |
| 62 void waitForLoaderThreadCompletion(); | 65 void waitForLoaderThreadCompletion(); |
| 63 | 66 |
| 64 // Returns the database or nullptr if the database doesn't yet exist. Must | 67 // Returns the database or nullptr if the database doesn't yet exist. Must |
| 65 // be called from the audio thread. | 68 // be called from the audio thread. |
| 66 HRTFDatabase* database(); | 69 HRTFDatabase* database(); |
| 67 | 70 |
| 68 float databaseSampleRate() const { return m_databaseSampleRate; } | 71 float databaseSampleRate() const { return m_databaseSampleRate; } |
| 69 | 72 |
| 70 private: | 73 private: |
| 71 // Both constructor and destructor must be called from the main thread. | 74 // Both constructor and destructor must be called from the main thread. |
| 72 explicit HRTFDatabaseLoader(float sampleRate); | 75 explicit HRTFDatabaseLoader(float sampleRate); |
| 73 | 76 |
| 74 // If it hasn't already been loaded, creates a new thread and initiates asynch
ronous loading of the default database. | 77 // If it hasn't already been loaded, creates a new thread and initiates |
| 78 // asynchronous loading of the default database. |
| 75 // This must be called from the main thread. | 79 // This must be called from the main thread. |
| 76 void loadAsynchronously(); | 80 void loadAsynchronously(); |
| 77 | 81 |
| 78 // Called in asynchronous loading thread. | 82 // Called in asynchronous loading thread. |
| 79 void loadTask(); | 83 void loadTask(); |
| 80 void cleanupTask(WaitableEvent*); | 84 void cleanupTask(WaitableEvent*); |
| 81 | 85 |
| 82 // Holding a m_lock is required when accessing m_hrtfDatabase since we access
it from multiple threads. | 86 // Holding a m_lock is required when accessing m_hrtfDatabase since we access |
| 87 // it from multiple threads. |
| 83 Mutex m_lock; | 88 Mutex m_lock; |
| 84 std::unique_ptr<HRTFDatabase> m_hrtfDatabase; | 89 std::unique_ptr<HRTFDatabase> m_hrtfDatabase; |
| 85 | 90 |
| 86 std::unique_ptr<WebThread> m_thread; | 91 std::unique_ptr<WebThread> m_thread; |
| 87 | 92 |
| 88 float m_databaseSampleRate; | 93 float m_databaseSampleRate; |
| 89 }; | 94 }; |
| 90 | 95 |
| 91 } // namespace blink | 96 } // namespace blink |
| 92 | 97 |
| 93 #endif // HRTFDatabaseLoader_h | 98 #endif // HRTFDatabaseLoader_h |
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