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Wwise SDK 2025.1.4
AkStreamMgrModule.h
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2 The content of this file includes portions of the AUDIOKINETIC Wwise Technology
3 released in source code form as part of the SDK installer package.
4 
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26 
27 /// \file
28 /// Audiokinetic's implementation-specific definitions and factory of
29 /// overridable Stream Manager module.
30 /// Contains the default Stream Manager's implementation-specific interfaces that altogether constitute
31 /// the Low-Level I/O submodule. This submodule needs to be implemented by the game. All I/O requests
32 /// generated by the Stream Manager end up to one of the I/O hooks defined herein.
33 /// Read \ref streamingmanager_lowlevel to learn more about the Low-Level I/O.
34 
35 #ifndef _AK_STREAM_MGR_MODULE_H_
36 #define _AK_STREAM_MGR_MODULE_H_
37 
38 #include AK/SoundEngine/Common/IAkStreamMgr.h>
39 #include AK/Tools/Common/AkPlatformFuncs.h>
40 
41 /// \name Audiokinetic Stream Manager's implementation-specific definitions.
42 //@{
43 /// Stream Manager initialization settings.
44 /// \sa
45 /// - AK::IAkStreamMgr
46 /// - AK::StreamMgr::Create()
47 /// - \ref streamingmanager_settings
48 
49 struct AkStreamMgrSettings
50 {
51 };
52 
53 /// High-level IO devices initialization settings.
54 /// \sa
55 /// - AK::IAkStreamMgr
56 /// - AK::StreamMgr::CreateDevice()
57 /// - \ref streamingmanager_settings
58 struct AkDeviceSettings
59 {
60  void * pIOMemory; ///
61  ///
62  ///
63  AkUInt32 uIOMemorySize; ///
64  AkUInt32 uIOMemoryAlignment; ///
65  AkUInt32 ePoolAttributes; ///
66  AkUInt32 uGranularity; ///
67  AkThreadProperties threadProperties; ///
68  AkReal32 fTargetAutoStmBufferLength; ///
69  AkUInt32 uMaxConcurrentIO; ///
70  bool bUseStreamCache; ///
71  AkUInt32 uMaxCachePinnedBytes; ///
72 };
73 
74 /// File descriptor. File identification for the low-level I/O.
75 /// \sa
76 /// - AK::StreamMgr::IAkLowLevelIOHook
77 /// - AK::StreamMgr::IAkLowLevelIOHook::BatchOpen
78 /// - AK::StreamMgr::IAkLowLevelIOHook::Close
79 struct AkFileDesc
80 {
81  AkInt64 iFileSize = 0; ///
82  AkUInt64 uSector = 0; ///
83  ///
84  ///
85  ///
86  AkFileHandle hFile = AkFileHandle(); ///
87  AkDeviceID deviceID = AK_INVALID_DEVICE_ID; ///
88 };
89 
90 /// Structure for synchronous transfers handshaking with the Low-Level I/O. Used with blocking I/O hooks.
91 /// \sa AK::StreamMgr::IAkLowLevelIOHook
92 struct AkIOTransferInfo
93 {
94  AkUInt64 uFilePosition; ///
95  AkUInt32 uBufferSize; ///
96  AkUInt32 uRequestedSize; ///
97 };
98 
99 struct AkAsyncIOTransferInfo;
100 
101 /// Callback function prototype definition used for asynchronous I/O transfers between the Stream Manager and the Low-Level IO.
102 /// Notes:
103 /// - If you pass in_eResult of AK_Fail, all streams awaiting for this transfer are marked as invalid and will stop. An "IO error" notification is posted to the capture log.
104 /// - If the transfer was cancelled by the Stream Manager while it was in the Low-Level IO, you must return AK_Success, whether
105 /// you performed the operation or not. The Stream Manager knows that it was cancelled, so it will not try to use it after you call it back.
106 /// \sa
107 /// - AkAsyncIOTransferInfo
108 /// - AK::StreamMgr::IAkLowLevelIOHook
109 AK_CALLBACK( void, AkIOCallback )(
110  AkAsyncIOTransferInfo * in_pTransferInfo, ///
111  AKRESULT in_eResult ///
112  );
113 
114 /// Structure for asynchronous transfers handshaking with the Low-Level I/O. Extends AkIOTransferInfo.
115 /// \sa
116 /// - AK::StreamMgr::IAkLowLevelIOHook
117 /// - AkIOTransferInfo
118 /// - AkAIOCallback
119 struct AkAsyncIOTransferInfo : public AkIOTransferInfo
120 {
121  void * pBuffer; ///
122  AkIOCallback pCallback; ///
123  void * pCookie; ///
124  void * pUserData; ///
125 };
126 
127 struct AkAsyncFileOpenData;
128 
129 /// Callback signature for the notification of completion of the asynchronous Open operation.
130 /// \sa
131 /// - AkAsyncFileOpenData
132 /// - AK::StreamMgr::IAkLowLevelIOHook::BatchOpen
133 AK_CALLBACK(void, AkFileOpenCallback)(
134  AkAsyncFileOpenData * in_pOpenInfo, ///
135  AKRESULT in_eResult ///
136  );
137 
138 /// Structure used by Low Level IO Hooks (IAkLowLevelIOHook) to pass and retreive information on files to be opened by the IO hook.
139 /// Please see AK::StreamMgr::IAkLowLevelIOHook::BatchOpen for more information about the sementics of the Open operation.
140 /// \sa
141 /// - AkFileOpenData
142 /// - AK::StreamMgr::IAkLowLevelIOHook::BatchOpen
143 struct AkAsyncFileOpenData : public AkFileOpenData
144 {
145  ~AkAsyncFileOpenData();
146 
147  AkAsyncFileOpenData(const AkFileOpenData& in_copy)
148  : pCallback(NULL)
149  , pCookie(NULL)
150  , pFileDesc(NULL)
151  , pCustomData(NULL)
152  , pszStreamName(NULL)
153  {
154  *(AkFileOpenData*)this = in_copy;
155  }
156 
157  AkAsyncFileOpenData(const AkAsyncFileOpenData& in_copy)
158  : pCallback(in_copy.pCallback)
159  , pCookie(in_copy.pCookie)
160  , pFileDesc(in_copy.pFileDesc)
161  , pCustomData(NULL)
162  , pszStreamName(NULL)
163  {
164  *(AkFileOpenData*)this = in_copy;
165  }
166 
167  AkAsyncFileOpenData()
168  : AkFileOpenData()
169  , pCallback(NULL)
170  , pCookie(NULL)
171  , pFileDesc(NULL)
172  , pCustomData(NULL)
173  , pszStreamName(NULL)
174  {}
175 
176  AkAsyncFileOpenData(const AkOSChar* in_pszFileName, AkOpenMode in_eOpenMode = AK_OpenModeRead, AkFileSystemFlags* in_pFlags = NULL)
177  :AkFileOpenData(in_pszFileName, in_eOpenMode, in_pFlags)
178  , pCallback(NULL)
179  , pCookie(NULL)
180  , pFileDesc(NULL)
181  , pCustomData(NULL)
182  , pszStreamName(NULL)
183  {}
184 
185  AkAsyncFileOpenData(AkFileID in_idFile, AkOpenMode in_eOpenMode = AK_OpenModeRead, AkFileSystemFlags* in_pFlags = NULL)
186  :AkFileOpenData(in_idFile, in_eOpenMode, in_pFlags)
187  , pCallback(NULL)
188  , pCookie(NULL)
189  , pFileDesc(NULL)
190  , pCustomData(NULL)
191  , pszStreamName(NULL)
192  {}
193 
194  ///
195  AKRESULT SetStreamName(const AkOSChar* in_pszStreamName);
196  const AkOSChar* GetStreamName() const { return pszStreamName; }
197 
198  AkFileOpenCallback pCallback; ///
199  void* pCookie; ///
200  AkFileDesc* pFileDesc; ///
201  void* pCustomData; ///
202 
203 private:
204  AkOSChar* pszStreamName; ///
205 };
206 
207 /// Low-Level I/O requests heuristics.
208 /// Used for asynchronous read requests.
209 /// \sa
210 /// - AK::StreamMgr::IAkLowLevelIOHook::BatchRead()
211 /// - AK::StreamMgr::IAkLowLevelIOHook::BatchWrite()
212 struct AkIoHeuristics
213 {
214  AkReal32 fDeadline; ///
215  AkPriority priority; ///
216 };
217 
218 
219 //@}
220 
221 namespace AK
222 {
223  /// Audiokinetic Stream Manager's implementation-specific interfaces of the Low-Level IO submodule.
224  namespace StreamMgr
225  {
226  /// Interface for batched deferred low-level I/O transfers.
227  /// This I/O transfer handshaking method is preferred when you want to hook I/O to your own
228  /// I/O streaming technology, and you want to submit multiple I/O requests in one call, so as
229  /// to allow for better opportunities for CPU and I/O performance.
230  /// All operations in this interface will be happening in the device's own thread, separate
231  /// from the main audio thread. Also, it is assumed that all operations are asynchronous although
232  /// immediate resolution is also supported.
233  /// You may queue them into your own system, and even use the heuristics passed down to this
234  /// level for your convenience. Note that the requests are always sent in the order that the
235  /// Stream Manager considers to be the most appropriate. You may receive less than
236  /// AkDeviceSettings::uMaxConcurrentIO at any given time. The number of concurrent transfers
237  /// depends on the number of streams running in the high-level streaming device, and on its
238  /// target buffering length and granularity. Your advantage at this level is to be aware of
239  /// file placement, so you may try to re-order requests in order to minimize seeking on disk.
240  /// Calls to BatchRead()/BatchWrite() should return as soon as possible. You need to call
241  /// AkAsyncIOTransferInfo::pCallback for all individual items in a transfer batch.
242  /// Cancel() is provided in order to inform you that the streaming device will flush this transfer
243  /// upon completion. You may implement it or not. In all cases, you must call the callback.
244  class IAkLowLevelIOHook
245  {
246  protected:
247  /// Virtual destructor on interface to avoid warnings.
248  virtual ~IAkLowLevelIOHook(){}
249 
250  public:
251 
252  /// Closes a file.
253  /// The file descriptor should be deleted during this call.
254  /// No other module should have a reference to it at this point.
255  /// \return AK_Success if the file was properly cleaned-up.
256  virtual AKRESULT Close(
257  AkFileDesc * in_pFileDesc ///
258  ) = 0;
259 
260  /// Returns the block size for the file or its storage device.
261  /// The block size is a constraint for clients
262  /// of the Stream Manager: All reads, writes and position changes need to be a multiple of
263  /// that size.
264  /// \return
265  /// The block size for a specific file or storage device.
266  /// \remarks
267  /// - Some files might be opened with flags that require I/O transfers to be a multiple
268  /// of this size. The stream manager will query this function to resolve calls
269  /// to IAk(Auto)Stream::GetBlockSize( ).
270  /// - Also, AkFileDesc::uSector specifies a number of sectors in multiples of this value.
271  /// - Files/IO devices that do not require byte alignment should return 1.
272  /// - Whether file opening was deferred or not, GetBlockSize() is always called right
273  /// after the first call to Open(), in the client's thread, and is never called again.
274  /// \warning
275  /// Returning 0 is not allowed and will likely make the Stream Manager crash.
276  /// \sa
277  /// - AK::StreamMgr::IAkLowLevelIOHook::BatchOpen()
278  /// - AK::StreamMgr::IAkLowLevelIOHook::BatchRead()
279  /// - AK::StreamMgr::IAkLowLevelIOHook::BatchWrite()
280  virtual AkUInt32 GetBlockSize(
281  AkFileDesc & in_fileDesc ///
282  ) = 0;
283 
284  /// Returns a description for the streaming device above this low-level hook.
285  /// \remarks For profiling purposes only. The Release configuration of the
286  /// Stream Manager never calls it.
287  virtual void GetDeviceDesc(
288  AkDeviceDesc & out_deviceDesc ///
289  ) = 0;
290 
291  /// Returns custom profiling data for the streaming device above this low-level hook.
292  /// As opposed to GetDeviceDesc(), this is called at every monitoring frame.
293  /// You may implement this function in order to display any value you find useful
294  /// in the "Streaming Devices" tab of the Wwise profiler ("Custom Param" column).
295  /// \remarks For profiling purposes only. The Release configuration of the
296  /// Stream Manager never calls it.
297  /// \return A 32-bit unsigned value to display in the Wwise profiler.
298  virtual AkUInt32 GetDeviceData() = 0;
299 
300  struct BatchIoTransferItem
301  {
302  AkFileDesc* pFileDesc;
303  AkIoHeuristics ioHeuristics;
304  AkAsyncIOTransferInfo* pTransferInfo;
305  };
306 
307 
308  /// Request to open multiple files (asynchronous).
309  /// \remarks
310  /// - The pCallback within each AkAsyncFileOpenData must be called when completed.
311  /// - It is possible to mix synchronous and asynchronous file opens, as long as all pCallbacks are eventually called.
312  /// - When implementing this function, make sure to process all items even if one fails to be dispatched or to open.
313  /// - Pointers in in_ppItems will stay valid until pCallback is called to signal the operation result.
314  virtual void BatchOpen(
315  AkUInt32 in_uNumFiles, ///
316  AkAsyncFileOpenData** in_ppItems ///
317  ) = 0;
318 
319  /// Reads multiple data from multiple files (asynchronous).
320  /// \remarks
321  /// - Queue up multiple read requests at once, using the provided array of in_pTransferItems. There will
322  /// be in_uNumTransfers number of items in the array.
323  /// - The pCallback within each BatchIoTransferItem::pTransferInfo must be called when completed.
324  /// - The pointer to each BatchIoTransferItem::pTransferInfo will be valid until the high-level
325  /// device is notified through the callback. However, the array of in_pTransferItems will not be valid.
326  /// - File position passed in each BatchIoTransferItem::pTransferInfo takes the offset of this file relative
327  /// to AkFileDesc::hFile (described with AkFileDesc::uSector). It is computed by the high-level
328  /// device as "pFileDesc->uSector * Block_Size + Stream_Position", where Block_Size is obtained
329  /// via AK::StreamMgr::IAkLowLevelIOHook::GetBlockSize().
330  virtual void BatchRead(
331  AkUInt32 in_uNumTransfers, ///
332  BatchIoTransferItem* in_pTransferItems ///
333  ) = 0;
334 
335  /// Write multiple data to multiple files (asynchronous).
336  /// \remarks
337  /// - Queue up multiple write requests at once, using the provided array of in_pTransferItems. There will
338  /// be in_uNumTransfers number of items in the array.
339  /// - The pCallback within each BatchIoTransferItem::pTransferInfo must be called when completed.
340  /// - The pointer to each BatchIoTransferItem::pTransferInfo will be valid until the high-level
341  /// device is notified through the callback. However, the array of in_pTransferItems will not be valid.
342  /// - File position passed in each BatchIoTransferItem::pTransferInfo takes the offset of this file relative
343  /// to AkFileDesc::hFile (described with AkFileDesc::uSector). It is computed by the high-level
344  /// device as "pFileDesc->uSector * Block_Size + Stream_Position", where Block_Size is obtained
345  /// via AK::StreamMgr::IAkLowLevelIOHook::GetBlockSize().
346  virtual void BatchWrite(
347  AkUInt32 in_uNumTransfers, ///
348  BatchIoTransferItem* in_pTransferItems ///
349  ) = 0;
350 
351  /// This function is called to provide information when file related errors occur. The base paths known by this IO hook should be returned in out_searchedPath.
352  virtual AKRESULT OutputSearchedPaths(
353  AKRESULT in_result, ///
354  const AkFileOpenData& in_FileOpen, ///
355  AkOSChar* out_searchedPath, ///
356  AkInt32 in_pathSize ///
357  ) {
358  AK_UNUSEDVAR(in_result);
359  AK_UNUSEDVAR(in_FileOpen);
360  AK_UNUSEDVAR(out_searchedPath);
361  AK_UNUSEDVAR(in_pathSize);
362  return AK_NotImplemented; };
363  };
364 
365  /// File location resolver interface. There is one and only one File Location Resolver that is
366  /// registered to the Stream Manager (using AK::StreamMgr::SetFileLocationResolver()). Its purpose
367  /// is to resolve a file name or ID to a streaming device (I/O hook) that can handle the file.
368  /// When your Low-Level I/O submodule uses a single device, you should create a standalone I/O
369  /// hook which implements one of the I/O hooks defined above, as well
370  /// as the File Location Resolver. You then register this object to the Stream Manager as the
371  /// File Location Resolver.
372  /// If you wish to create multiple devices, then you should have a separate object that implements
373  /// AK::StreamMgr::IAkFileLocationResolver and registers to the Stream Manager as such. This object
374  /// will be used to dispatch the file open request to the appropriate device. The strategy you will
375  /// use to select the correct device is up to you to implement.
376  /// There is a built-in mechanism of chaining devices through GetNextPreferredDevice().
377  /// If a device can't open a file GetNextPreferredDevice will be called again to get the next
378  /// device to check.
379  class IAkFileLocationResolver
380  {
381  protected:
382  /// Virtual destructor on interface to avoid warnings.
383  virtual ~IAkFileLocationResolver(){}
384 
385  public:
386 
387  /// Determines which device to use to open a file.
388  /// If your File Resolver only handles one device, return AK_NotImplemented and the StreamMgr will use the only device configured.
389  /// If it handles multiple devices, you can base the decision on where to get the file on any kind of heuristic:
390  /// file extension, file name, access rights, CodecID, etc.
391  /// The order in which devices are searched is left to the implementer.
392  /// This function will always be called first with io_idDevice = AK_INVALID_DEVICE_ID.
393  /// \return
394  /// - AK_Success if there is a device to delegate the Open() call to. io_idDevice should be set to the proper AkDeviceID (as returned by AK::StreamMgr::CreateDevice).
395  /// - AK_FileNotFound if all devices have been exhausted.
396  /// - AK_NotImplemented if there is only one device in the system and file resolution is trivial.
397  /// \remark
398  /// This can be called from multiple threads.
399  virtual AKRESULT GetNextPreferredDevice(
400  AkAsyncFileOpenData& in_FileOpen, ///
401  AkDeviceID& io_idDevice ///
402  )
403  {
404  AK_UNUSEDVAR(in_FileOpen);
405  AK_UNUSEDVAR(io_idDevice);
406  return AK_NotImplemented;
407  };
408  };
409 
410  /// \name Audiokinetic implementation-specific Stream Manager factory.
411  //@{
412  /// Stream Manager factory.
413  /// \remarks
414  /// - In order for the Stream Manager to work properly, you also need to create
415  /// at least one streaming device (and implement its I/O hook), and register the
416  /// File Location Resolver with AK::StreamMgr::SetFileLocationResolver().
417  /// - Use AK::StreamMgr::GetDefaultSettings(), then modify the settings you want,
418  /// then feed this function with them.
419  /// \sa
420  /// - AK::IAkStreamMgr
421  /// - AK::StreamMgr::SetFileLocationResolver()
422  /// - AK::StreamMgr::GetDefaultSettings()
423  AK_EXTERNAPIFUNC( IAkStreamMgr *, Create )(
424  const AkStreamMgrSettings & in_settings ///
425  );
426 
427  /// Get the default values for the Stream Manager's settings.
428  /// \sa
429  /// - AK::StreamMgr::Create()
430  /// - AkStreamMgrSettings
431  /// - \ref streamingmanager_settings
432  AK_EXTERNAPIFUNC( void, GetDefaultSettings )(
433  AkStreamMgrSettings & out_settings ///
434  );
435 
436  /// Get the one and only File Location Resolver registered to the Stream Manager.
437  /// \sa
438  /// - AK::StreamMgr::IAkFileLocationResolver
439  /// - AK::StreamMgr::SetFileLocationResolver()
440  AK_EXTERNAPIFUNC( IAkFileLocationResolver *, GetFileLocationResolver )();
441 
442  /// Register the one and only File Location Resolver to the Stream Manager.
443  /// \sa
444  /// - AK::StreamMgr::IAkFileLocationResolver
445  AK_EXTERNAPIFUNC( void, SetFileLocationResolver )(
446  IAkFileLocationResolver * in_pFileLocationResolver ///
447  );
448 
449  //@}
450 
451  /// \name Stream Manager: High-level I/O devices management.
452  //@{
453  /// Streaming device creation.
454  /// Creates a high-level device, with specific settings.
455  /// You need to provide the associated low-level I/O hook, implemented on your side.
456  /// \return The device ID. AK_INVALID_DEVICE_ID if there was an error and it could not be created.
457  /// \warning
458  /// - This function is not thread-safe.
459  /// \remarks
460  /// - You may use AK::StreamMgr::GetDefaultDeviceSettings() first to get default values for the
461  /// settings, change those you want, then feed the structure to this function.
462  /// - The returned device ID should be kept by the Low-Level IO, to assign it to file descriptors
463  /// in AK::StreamMgr::IAkLowLevelIOHook::BatchOpen().
464  /// \return
465  /// - AK_Success: Device was added to the system properly
466  /// - AK_InsufficientMemory: Not enough memory to complete the operation
467  /// - AK_InvalidParameter: One of the settings in AkDeviceSettings is out of range. Check asserts or debug console.
468  /// \sa
469  /// - AK::StreamMgr::IAkLowLevelIOHook
470  /// - AK::StreamMgr::GetDefaultDeviceSettings()
471  /// - \ref streamingmanager_settings
472  AK_EXTERNAPIFUNC( AKRESULT, CreateDevice )(
473  const AkDeviceSettings & in_settings, ///
474  IAkLowLevelIOHook * in_pLowLevelHook, ///
475  AkDeviceID& out_idDevice ///
476  );
477  /// Streaming device destruction.
478  /// \return AK_Success if the device was successfully destroyed.
479  /// \warning This function is not thread-safe. No stream should exist for that device when it is destroyed.
480  AK_EXTERNAPIFUNC( AKRESULT, DestroyDevice )(
481  AkDeviceID in_deviceID ///
482  );
483 
484  /// Execute pending I/O operations on all created I/O devices.
485  /// This should only be called in single-threaded environments where an I/O device cannot spawn a thread.
486  /// \return AK_Success when called from an appropriate environment, AK_NotCompatible otherwise.
487  /// \sa
488  /// - AK::StreamMgr::CreateDevice()
489  AK_EXTERNAPIFUNC( AKRESULT, PerformIO )();
490 
491  /// Get the default values for the streaming device's settings. Recommended usage
492  /// is to call this function first, then pass the settings to AK::StreamMgr::CreateDevice().
493  /// \sa
494  /// - AK::StreamMgr::CreateDevice()
495  /// - AkDeviceSettings
496  /// - \ref streamingmanager_settings
497  AK_EXTERNAPIFUNC( void, GetDefaultDeviceSettings )(
498  AkDeviceSettings & out_settings ///
499  );
500  //@}
501 
502  /// \name Language management.
503  //@{
504  /// Set the current language once and only once, here. The language name is stored in a static buffer
505  /// inside the Stream Manager. In order to resolve localized (language-specific) file location,
506  /// AK::StreamMgr::IAkFileLocationResolver implementations query this string. They may use it to
507  /// construct a file path (for e.g. SDK/samples/SoundEngine/Common/AkFileLocationBase.cpp), or to
508  /// find a language-specific file within a look-up table (for e.g. SDK/samples/SoundEngine/Common/AkFilePackageLUT.cpp).
509  /// Pass a valid null-terminated string, without a trailing slash or backslash. Empty strings are accepted.
510  /// You may register for language changes (see RegisterToLanguageChangeNotification()).
511  /// After changing the current language, all observers are notified.
512  /// \return AK_Success if successful (if language string has less than AK_MAX_LANGUAGE_NAME_SIZE characters). AK_Fail otherwise.
513  /// \warning Not multithread safe.
514  /// \sa
515  /// - AK::StreamMgr::GetCurrentLanguage()
516  /// - AK::StreamMgr::AddLanguageChangeObserver()
517  AK_EXTERNAPIFUNC( AKRESULT, SetCurrentLanguage )(
518  const AkOSChar * in_pszLanguageName ///
519  );
520 
521  /// Get the current language. The language name is stored in a static buffer inside the Stream Manager,
522  /// with AK::StreamMgr::SetCurrentLanguage(). In order to resolve localized (language-specific) file location,
523  /// AK::StreamMgr::IAkFileLocationResolver implementations query this string. They may use it to
524  /// construct a file path (for e.g. SDK/samples/SoundEngine/Common/AkFileLocationBase.cpp), or to
525  /// find a language-specific file within a look-up table (for e.g. SDK/samples/SoundEngine/Common/AkFilePackageLUT.cpp).
526  /// \return Current language in string format, as specified in AK::StreamMgr::SetCurrentLanguage().
527  /// \sa AK::StreamMgr::SetCurrentLanguage()
528  AK_EXTERNAPIFUNC( const AkOSChar *, GetCurrentLanguage )();
529 
530  /// Definition of handlers for language change notifications.
531  /// Called after SetCurrentLanguage() is called.
532  /// \warning Do not call AddLanguageChangeObserver or SetCurrentLanguage from within your handler.
533  /// \warning Not multithread safe.
534  /// \sa
535  /// - AK::StreamMgr::SetCurrentLanguage()
536  /// - AK::StreamMgr::AddLanguageChangeObserver()
537  AK_CALLBACK( void, AkLanguageChangeHandler )(
538  const AkOSChar * const in_pLanguageName,///
539  void * in_pCookie ///
540  );
541 
542  /// Register to language change notifications.
543  /// \return AK_Success if successful, AK_Fail otherwise (no memory or no cookie).
544  /// \warning Not multithread safe.
545  /// \sa
546  /// - AK::StreamMgr::SetCurrentLanguage()
547  /// - AK::StreamMgr::RemoveLanguageChangeObserver()
548  AK_EXTERNAPIFUNC( AKRESULT, AddLanguageChangeObserver )(
549  AkLanguageChangeHandler in_handler, ///
550  void * in_pCookie ///
551  );
552 
553  /// Unregister to language change notifications. Use the cookie you have passed to
554  /// AddLanguageChangeObserver() to identify the observer.
555  /// \warning Not multithread safe.
556  /// \sa
557  /// - AK::StreamMgr::SetCurrentLanguage()
558  /// - AK::StreamMgr::AddLanguageChangeObserver()
559  AK_EXTERNAPIFUNC( void, RemoveLanguageChangeObserver )(
560  void * in_pCookie ///
561  );
562 
563  /// \name Stream Manager: Cache management.
564  //@{
565  /// Flush cache of all devices. This function has no effect for devices where
566  /// AkDeviceSettings::bUseStreamCache was set to false (no caching).
567  /// \sa
568  /// - \ref streamingmanager_settings
569  AK_EXTERNAPIFUNC( void, FlushAllCaches )();
570 
571  //@}
572  }
573 }
574 
575 #endif //_AK_STREAM_MGR_MODULE_H_
AkAsyncIOTransferInfo::pCookie
void * pCookie
Reserved. The I/O device uses this cookie to retrieve the owner of the transfer.
Definition: AkStreamMgrModule.h:123
AkDeviceSettings::uIOMemoryAlignment
AkUInt32 uIOMemoryAlignment
I/O memory alignment. It is passed directly to AK::MemoryMgr::Malign().
Definition: AkStreamMgrModule.h:64
AkIoHeuristics::fDeadline
AkReal32 fDeadline
Operation deadline (ms).
Definition: AkStreamMgrModule.h:214
AK
Definition of data structures for AkAudioObject
Definition: AkWwiseSDKVersion.cs:31
AK::StreamMgr::IAkLowLevelIOHook::BatchRead
virtual void BatchRead(AkUInt32 in_uNumTransfers, BatchIoTransferItem *in_pTransferItems)=0
AK::StreamMgr::DestroyDevice
AKSOUNDENGINE_API AKRESULT DestroyDevice(AkDeviceID in_deviceID)
AK::StreamMgr::SetCurrentLanguage
AKSOUNDENGINE_API AKRESULT SetCurrentLanguage(const AkOSChar *in_pszLanguageName)
AK::StreamMgr::IAkLowLevelIOHook::GetDeviceData
virtual AkUInt32 GetDeviceData()=0
AkAsyncFileOpenData::AkAsyncFileOpenData
AkAsyncFileOpenData(AkFileID in_idFile, AkOpenMode in_eOpenMode=AK_OpenModeRead, AkFileSystemFlags *in_pFlags=NULL)
Functions used to manage optional stream name. The name will be used when sending stream information ...
Definition: AkStreamMgrModule.h:185
AK::StreamMgr::AkLanguageChangeHandler
void(* AkLanguageChangeHandler)(const AkOSChar *const in_pLanguageName, void *in_pCookie)
Definition: AkStreamMgrModule.h:537
AkDeviceSettings::uMaxCachePinnedBytes
AkUInt32 uMaxCachePinnedBytes
Maximum number of bytes that can be "pinned" using AK::SoundEngine::PinEventInStreamCache() or AK::IA...
Definition: AkStreamMgrModule.h:71
AkAsyncIOTransferInfo::pUserData
void * pUserData
Custom user data.
Definition: AkStreamMgrModule.h:124
AkIOTransferInfo::uRequestedSize
AkUInt32 uRequestedSize
Exact number of requested bytes for this transfer. Always equal to or smaller than uBufferSize.
Definition: AkStreamMgrModule.h:96
AkAsyncFileOpenData::AkAsyncFileOpenData
AkAsyncFileOpenData(const AkFileOpenData &in_copy)
Definition: AkStreamMgrModule.h:147
AK_EXTERNAPIFUNC
#define AK_EXTERNAPIFUNC(_type, _name)
Definition: AkSoundEngineExport.h:81
AkDeviceSettings::uMaxConcurrentIO
AkUInt32 uMaxConcurrentIO
Maximum number of transfers that can be sent simultaneously to the Low-Level I/O.
Definition: AkStreamMgrModule.h:69
AkDeviceSettings::fTargetAutoStmBufferLength
AkReal32 fTargetAutoStmBufferLength
Targetted automatic stream buffer length (ms). When a stream reaches that buffering,...
Definition: AkStreamMgrModule.h:68
AkDeviceSettings::bUseStreamCache
bool bUseStreamCache
If true, the device attempts to reuse I/O buffers that have already been streamed from disk....
Definition: AkStreamMgrModule.h:70
AK::StreamMgr::GetDefaultSettings
AKSOUNDENGINE_API void GetDefaultSettings(AkStreamMgrSettings &out_settings)
AK::StreamMgr::IAkLowLevelIOHook::~IAkLowLevelIOHook
virtual ~IAkLowLevelIOHook()
Virtual destructor on interface to avoid warnings.
Definition: AkStreamMgrModule.h:248
AkAsyncFileOpenData::AkAsyncFileOpenData
AkAsyncFileOpenData(const AkOSChar *in_pszFileName, AkOpenMode in_eOpenMode=AK_OpenModeRead, AkFileSystemFlags *in_pFlags=NULL)
Definition: AkStreamMgrModule.h:176
AkFileDesc::deviceID
AkDeviceID deviceID
Device ID, obtained from CreateDevice()
Definition: AkStreamMgrModule.h:87
AK_INVALID_DEVICE_ID
static const AkDeviceID AK_INVALID_DEVICE_ID
Invalid streaming device ID
Definition: AkConstants.h:43
AK_OpenModeRead
@ AK_OpenModeRead
Read-only access
Definition: IAkStreamMgr.h:74
AkIoHeuristics::priority
AkPriority priority
Operation priority (at the time it was scheduled and sent to the Low-Level I/O). Range is [AK_MIN_PRI...
Definition: AkStreamMgrModule.h:215
AkIOCallback
void(* AkIOCallback)(AkAsyncIOTransferInfo *in_pTransferInfo, AKRESULT in_eResult)
Definition: AkStreamMgrModule.h:109
AkOSChar
char AkOSChar
Generic character string
Definition: AkTypes.h:60
AkDeviceSettings::ePoolAttributes
AkUInt32 ePoolAttributes
Attributes for I/O memory. Here, specify the allocation type (AkMemType_Device, and so on)....
Definition: AkStreamMgrModule.h:65
AkIOTransferInfo::uBufferSize
AkUInt32 uBufferSize
Size of the buffer in which the I/O hook can write to.
Definition: AkStreamMgrModule.h:95
AkReal32
float AkReal32
32-bit floating point
Definition: AkNumeralTypes.h:43
AkFileHandle
FILE * AkFileHandle
File handle
Definition: AkTypes.h:77
AkInt32
int32_t AkInt32
Signed 32-bit integer
Definition: AkNumeralTypes.h:40
AkAsyncIOTransferInfo::pBuffer
void * pBuffer
Buffer for data transfer.
Definition: AkStreamMgrModule.h:121
AkFileOpenCallback
void(* AkFileOpenCallback)(AkAsyncFileOpenData *in_pOpenInfo, AKRESULT in_eResult)
Definition: AkStreamMgrModule.h:133
AkAsyncFileOpenData::pCookie
void * pCookie
Reserved. Pass this unchanged to the callback function. The I/O device uses this cookie to retrieve t...
Definition: AkStreamMgrModule.h:199
AkAsyncFileOpenData::pCustomData
void * pCustomData
Convenience pointer for the IO hook implementer. Useful for additional data used in asynchronous impl...
Definition: AkStreamMgrModule.h:201
AkAsyncFileOpenData::AkAsyncFileOpenData
AkAsyncFileOpenData(const AkAsyncFileOpenData &in_copy)
Definition: AkStreamMgrModule.h:157
AkDeviceSettings::uGranularity
AkUInt32 uGranularity
I/O requests granularity (typical bytes/request).
Definition: AkStreamMgrModule.h:66
AK::StreamMgr::IAkLowLevelIOHook::GetDeviceDesc
virtual void GetDeviceDesc(AkDeviceDesc &out_deviceDesc)=0
AK::StreamMgr::PerformIO
AKSOUNDENGINE_API AKRESULT PerformIO()
AkAsyncFileOpenData::pCallback
AkFileOpenCallback pCallback
Callback function used to notify the high-level device when Open is done
Definition: AkStreamMgrModule.h:198
AkAsyncFileOpenData::SetStreamName
AKRESULT SetStreamName(const AkOSChar *in_pszStreamName)
AK::StreamMgr::IAkFileLocationResolver::GetNextPreferredDevice
virtual AKRESULT GetNextPreferredDevice(AkAsyncFileOpenData &in_FileOpen, AkDeviceID &io_idDevice)
Definition: AkStreamMgrModule.h:399
AK::StreamMgr::CreateDevice
AKSOUNDENGINE_API AKRESULT CreateDevice(const AkDeviceSettings &in_settings, IAkLowLevelIOHook *in_pLowLevelHook, AkDeviceID &out_idDevice)
AkFileID
AkUInt32 AkFileID
Integer-type file identifier
Definition: AkTypedefs.h:56
AK_CALLBACK
#define AK_CALLBACK(_type, _name)
Definition: AkSoundEngineExport.h:87
AK::StreamMgr::IAkLowLevelIOHook::Close
virtual AKRESULT Close(AkFileDesc *in_pFileDesc)=0
AkFileDesc::uSector
AkUInt64 uSector
Definition: AkStreamMgrModule.h:82
AkFileSystemFlags
File system flags for file descriptors mapping.
Definition: AkFileSystemFlags.h:35
AK::StreamMgr::IAkLowLevelIOHook::GetBlockSize
virtual AkUInt32 GetBlockSize(AkFileDesc &in_fileDesc)=0
AkInt64
int64_t AkInt64
Signed 64-bit integer
Definition: AkNumeralTypes.h:41
AkAsyncFileOpenData::GetStreamName
const AkOSChar * GetStreamName() const
Definition: AkStreamMgrModule.h:196
AkAsyncIOTransferInfo::pCallback
AkIOCallback pCallback
Callback function used to notify the high-level device when the transfer is complete.
Definition: AkStreamMgrModule.h:122
AKRESULT
AKRESULT
Definition: AkEnums.h:32
AkUInt64
uint64_t AkUInt64
Unsigned 64-bit integer
Definition: AkNumeralTypes.h:36
AK::StreamMgr::GetFileLocationResolver
AKSOUNDENGINE_API IAkFileLocationResolver * GetFileLocationResolver()
AK::StreamMgr::IAkLowLevelIOHook::BatchWrite
virtual void BatchWrite(AkUInt32 in_uNumTransfers, BatchIoTransferItem *in_pTransferItems)=0
AK::StreamMgr::Create
AKSOUNDENGINE_API IAkStreamMgr * Create(const AkStreamMgrSettings &in_settings)
AK::StreamMgr::FlushAllCaches
AKSOUNDENGINE_API void FlushAllCaches()
AkOpenMode
AkOpenMode
File open mode.
Definition: IAkStreamMgr.h:73
AkDeviceDesc
Device descriptor.
Definition: IAkStreamMgr.h:124
AK::StreamMgr::GetDefaultDeviceSettings
AKSOUNDENGINE_API void GetDefaultDeviceSettings(AkDeviceSettings &out_settings)
AK::StreamMgr::SetFileLocationResolver
AKSOUNDENGINE_API void SetFileLocationResolver(IAkFileLocationResolver *in_pFileLocationResolver)
AkUInt32
uint32_t AkUInt32
Unsigned 32-bit integer
Definition: AkNumeralTypes.h:35
AK_UNUSEDVAR
#define AK_UNUSEDVAR(x)
Definition: AkPlatforms.h:157
AkAsyncFileOpenData::pFileDesc
AkFileDesc * pFileDesc
File Descriptor to fill once the Open operation is complete.
Definition: AkStreamMgrModule.h:200
AK::StreamMgr::IAkLowLevelIOHook::BatchOpen
virtual void BatchOpen(AkUInt32 in_uNumFiles, AkAsyncFileOpenData **in_ppItems)=0
AK::StreamMgr::RemoveLanguageChangeObserver
AKSOUNDENGINE_API void RemoveLanguageChangeObserver(void *in_pCookie)
AkPriority
AkInt8 AkPriority
Priority
Definition: AkTypedefs.h:46
AK::StreamMgr::AddLanguageChangeObserver
AKSOUNDENGINE_API AKRESULT AddLanguageChangeObserver(AkLanguageChangeHandler in_handler, void *in_pCookie)
AkIOTransferInfo::uFilePosition
AkUInt64 uFilePosition
File offset where transfer should begin.
Definition: AkStreamMgrModule.h:94
AK::StreamMgr::IAkFileLocationResolver::~IAkFileLocationResolver
virtual ~IAkFileLocationResolver()
Virtual destructor on interface to avoid warnings.
Definition: AkStreamMgrModule.h:383
AkDeviceSettings::uIOMemorySize
AkUInt32 uIOMemorySize
Size of memory for I/O (for automatic streams). It is passed directly to AK::MemoryMgr::Malign(),...
Definition: AkStreamMgrModule.h:63
AkFileDesc::hFile
AkFileHandle hFile
File handle/identifier
Definition: AkStreamMgrModule.h:86
AK_NotImplemented
@ AK_NotImplemented
This feature is not implemented.
Definition: AkEnums.h:33
AK::StreamMgr::IAkLowLevelIOHook::OutputSearchedPaths
virtual AKRESULT OutputSearchedPaths(AKRESULT in_result, const AkFileOpenData &in_FileOpen, AkOSChar *out_searchedPath, AkInt32 in_pathSize)
This function is called to provide information when file related errors occur. The base paths known b...
Definition: AkStreamMgrModule.h:352
AkFileDesc::iFileSize
AkInt64 iFileSize
File size in bytes
Definition: AkStreamMgrModule.h:81
AkDeviceID
AkUInt32 AkDeviceID
I/O device ID
Definition: AkTypedefs.h:57
AK::StreamMgr::GetCurrentLanguage
AKSOUNDENGINE_API const AkOSChar * GetCurrentLanguage()
AkDeviceSettings::threadProperties
AkThreadProperties threadProperties
Scheduler thread properties.
Definition: AkStreamMgrModule.h:67

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