_ak_music_engine_8h

Wwise SDK 2022.1.19

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 // AkMusicEngine.h
  
 /// \file 
 /// The main music engine interface.
  
  
 #ifndef _AK_MUSICENGINE_H_
 #define _AK_MUSICENGINE_H_
  
 #include <AK/SoundEngine/Common/AkSoundEngineExport.h>
 #include <AK/SoundEngine/Common/AkTypes.h>
 #include <AK/SoundEngine/Common/AkCallback.h>
  
 /// Platform-independent initialization settings of the music engine
 /// \sa 
 /// - AK::MusicEngine::Init()
 /// - \ref soundengine_integration_init_advanced
 struct AkMusicSettings
 {
     AkReal32 fStreamingLookAheadRatio;  ///< Multiplication factor for all streaming look-ahead heuristic values.
 };
  
 // Audiokinetic namespace
 namespace AK
 {
     /// Music engine namespace
     /// \akwarning
     /// The functions in this namespace are not thread-safe, unless stated otherwise.
     /// \endakwarning
     namespace MusicEngine
     {
         ///////////////////////////////////////////////////////////////////////
         /// @name Initialization
         //@{
  
         /// Initialize the music engine.
         /// \warning This function must be called after the base sound engine has been properly initialized. 
         /// There should be no AK API call between AK::SoundEngine::Init() and this call. Any call done in between is potentially unsafe.
         /// \return AK_Success if the Init was successful, AK_Fail otherwise.
         /// \sa
         /// - \ref workingwithsdks_initialization
         AK_EXTERNAPIFUNC( AKRESULT, Init )(
             AkMusicSettings *   in_pSettings    ///< Initialization settings (can be NULL, to use the default values)
             );
  
         /// Get the music engine's default initialization settings values
         /// \sa
         /// - \ref soundengine_integration_init_advanced
         /// - AK::MusicEngine::Init()
         AK_EXTERNAPIFUNC( void, GetDefaultInitSettings )(
             AkMusicSettings &   out_settings    ///< Returned default platform-independent music engine settings
             );
  
         /// Terminate the music engine.
         /// \warning This function must be called before calling Term() on the base sound engine.
         /// \sa
         /// - \ref workingwithsdks_termination
         AK_EXTERNAPIFUNC( void, Term )(
             );
         
         /// Query information on the active segment of a music object that is playing. Use the playing ID 
         /// that was returned from AK::SoundEngine::PostEvent(), provided that the event contained a play
         /// action that was targetting a music object. For any configuration of interactive music hierarchy, 
         /// there is only one segment that is active at a time. 
         /// To be able to query segment information, you must pass the AK_EnableGetMusicPlayPosition flag 
         /// to the AK::SoundEngine::PostEvent() method. This informs the sound engine that the source associated 
         /// with this event should be given special consideration because GetPlayingSegmentInfo() can be called 
         /// at any time for this AkPlayingID.
         /// Notes:
         /// - If the music object is a single segment, you will get negative values for AkSegmentInfo::iCurrentPosition
         ///     during the pre-entry. This will never occur with other types of music objects because the 
         ///     pre-entry of a segment always overlaps another active segment.
         /// - The active segment during the pre-entry of the first segment of a Playlist Container or a Music Switch 
         ///     Container is "nothing", as well as during the post-exit of the last segment of a Playlist (and beyond).
         /// - When the active segment is "nothing", out_uSegmentInfo is filled with zeros.
         /// - If in_bExtrapolate is true (default), AkSegmentInfo::iCurrentPosition is corrected by the amount of time elapsed
         ///     since the beginning of the audio frame. It is thus possible that it slightly overshoots the total segment length.
         /// \return AK_Success if there is a playing music structure associated with the specified playing ID.
         /// \sa
         /// - AK::SoundEngine::PostEvent
         /// - AkSegmentInfo
         AK_EXTERNAPIFUNC( AKRESULT, GetPlayingSegmentInfo )(
             AkPlayingID     in_PlayingID,           ///< Playing ID returned by AK::SoundEngine::PostEvent().
             AkSegmentInfo & out_segmentInfo,        ///< Structure containing information about the active segment of the music structure that is playing.
             bool            in_bExtrapolate = true  ///< Position is extrapolated based on time elapsed since last sound engine update.
             );
  
         //@}
     }
 }
  
 #endif // _AK_MUSICENGINE_H_
  