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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 12 matching lines...) Expand all Loading... | |
23 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND | 23 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND |
24 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | 24 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF | 25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | 26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
27 */ | 27 */ |
28 | 28 |
29 #ifndef HRTFDatabaseLoader_h | 29 #ifndef HRTFDatabaseLoader_h |
30 #define HRTFDatabaseLoader_h | 30 #define HRTFDatabaseLoader_h |
31 | 31 |
32 #include "core/platform/audio/HRTFDatabase.h" | 32 #include "core/platform/audio/HRTFDatabase.h" |
33 #include <wtf/PassRefPtr.h> | 33 #include "wtf/HashMap.h" |
34 #include <wtf/RefCounted.h> | 34 #include "wtf/PassRefPtr.h" |
35 #include <wtf/RefPtr.h> | 35 #include "wtf/RefCounted.h" |
36 #include <wtf/Threading.h> | 36 #include "wtf/RefPtr.h" |
37 #include "wtf/Threading.h" | |
37 | 38 |
38 namespace WebCore { | 39 namespace WebCore { |
39 | 40 |
40 // HRTFDatabaseLoader will asynchronously load the default HRTFDatabase in a new thread. | 41 // HRTFDatabaseLoader will asynchronously load the default HRTFDatabase in a new thread. |
41 | 42 |
42 class HRTFDatabaseLoader : public RefCounted<HRTFDatabaseLoader> { | 43 class HRTFDatabaseLoader : public RefCounted<HRTFDatabaseLoader> { |
43 public: | 44 public: |
44 // Lazily creates the singleton HRTFDatabaseLoader (if not already created) and starts loading asynchronously (when created the first time). | 45 // Lazily creates a HRTFDatabaseLoader (if not already created) for the give n sample-rate |
45 // Returns the singleton HRTFDatabaseLoader. | 46 // and starts loading asynchronously (when created the first time). |
47 // Returns the HRTFDatabaseLoader. | |
46 // Must be called from the main thread. | 48 // Must be called from the main thread. |
47 static PassRefPtr<HRTFDatabaseLoader> createAndLoadAsynchronouslyIfNecessary (float sampleRate); | 49 static PassRefPtr<HRTFDatabaseLoader> createAndLoadAsynchronouslyIfNecessary (float sampleRate); |
48 | 50 |
49 // Returns the singleton HRTFDatabaseLoader. | |
50 static HRTFDatabaseLoader* loader() { return s_loader; } | |
51 | |
52 // Both constructor and destructor must be called from the main thread. | 51 // Both constructor and destructor must be called from the main thread. |
53 ~HRTFDatabaseLoader(); | 52 ~HRTFDatabaseLoader(); |
54 | 53 |
55 // Returns true once the default database has been completely loaded. | 54 // Returns true once the default database has been completely loaded. |
56 bool isLoaded() const; | 55 bool isLoaded() const; |
57 | 56 |
58 // waitForLoaderThreadCompletion() may be called more than once and is threa d-safe. | 57 // waitForLoaderThreadCompletion() may be called more than once and is threa d-safe. |
59 void waitForLoaderThreadCompletion(); | 58 void waitForLoaderThreadCompletion(); |
60 | 59 |
61 HRTFDatabase* database() { return m_hrtfDatabase.get(); } | 60 HRTFDatabase* database() { return m_hrtfDatabase.get(); } |
62 | 61 |
63 float databaseSampleRate() const { return m_databaseSampleRate; } | 62 float databaseSampleRate() const { return m_databaseSampleRate; } |
64 | 63 |
65 // Called in asynchronous loading thread. | 64 // Called in asynchronous loading thread. |
66 void load(); | 65 void load(); |
67 | 66 |
68 // defaultHRTFDatabase() gives access to the loaded database. | 67 void reportMemoryUsage(MemoryObjectInfo*) const; |
69 // This can be called from any thread, but it is the callers responsibilty t o call this while the context (and thus HRTFDatabaseLoader) | |
70 // is still alive. Otherwise this will return 0. | |
71 static HRTFDatabase* defaultHRTFDatabase(); | |
72 | 68 |
73 void reportMemoryUsage(MemoryObjectInfo*) const; | 69 // Map from sample-rate to loader. |
70 class LoaderMap : public HashMap<double, HRTFDatabaseLoader*> { | |
71 public: | |
72 void reportMemoryUsage(MemoryObjectInfo*) const; | |
73 }; | |
74 | |
75 static HRTFDatabaseLoader::LoaderMap* loaderMap() { return s_loaderMap; } | |
Ken Russell (switch to Gerrit)
2013/05/13 21:44:18
It seems a bad idea to expose the LoaderMap direct
Chris Rogers
2013/05/14 20:23:10
Agreed that it's not ideal, but PlatformMemoryInst
| |
74 | 76 |
75 private: | 77 private: |
76 // Both constructor and destructor must be called from the main thread. | 78 // Both constructor and destructor must be called from the main thread. |
77 explicit HRTFDatabaseLoader(float sampleRate); | 79 explicit HRTFDatabaseLoader(float sampleRate); |
78 | 80 |
79 // If it hasn't already been loaded, creates a new thread and initiates asyn chronous loading of the default database. | 81 // If it hasn't already been loaded, creates a new thread and initiates asyn chronous loading of the default database. |
80 // This must be called from the main thread. | 82 // This must be called from the main thread. |
81 void loadAsynchronously(); | 83 void loadAsynchronously(); |
82 | 84 |
83 static HRTFDatabaseLoader* s_loader; // singleton | 85 // Keeps track of loaders on a per-sample-rate basis. |
86 static LoaderMap* s_loaderMap; // singleton | |
87 | |
84 OwnPtr<HRTFDatabase> m_hrtfDatabase; | 88 OwnPtr<HRTFDatabase> m_hrtfDatabase; |
85 | 89 |
86 // Holding a m_threadLock is required when accessing m_databaseLoaderThread. | 90 // Holding a m_threadLock is required when accessing m_databaseLoaderThread. |
87 Mutex m_threadLock; | 91 Mutex m_threadLock; |
88 ThreadIdentifier m_databaseLoaderThread; | 92 ThreadIdentifier m_databaseLoaderThread; |
89 | 93 |
90 float m_databaseSampleRate; | 94 float m_databaseSampleRate; |
91 }; | 95 }; |
92 | 96 |
93 } // namespace WebCore | 97 } // namespace WebCore |
94 | 98 |
95 #endif // HRTFDatabaseLoader_h | 99 #endif // HRTFDatabaseLoader_h |
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