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# isndsys/ss_stream.h

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    00001 /*
    00002     Copyright (C) 2004 by Andrew Mann
    00003     Copyright (C) 1998-2000 by Jorrit Tyberghein
    00004
    00005     This library is free software; you can redistribute it and/or
    00006     modify it under the terms of the GNU Library General Public
    00007     License as published by the Free Software Foundation; either
    00008     version 2 of the License, or (at your option) any later version.
    00009
    00010     This library is distributed in the hope that it will be useful,
    00011     but WITHOUT ANY WARRANTY; without even the implied warranty of
    00012     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
    00013     Library General Public License for more details.
    00014
    00015     You should have received a copy of the GNU Library General Public
    00016     License along with this library; if not, write to the Free
    00017     Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
    00018 */
    00019
    00020 #ifndef __CS_SNDSYS_STREAM_H__
    00021 #define __CS_SNDSYS_STREAM_H__
    00022
    00027 #include "csutil/scf.h"
    00028
    00032 struct csSndSysSoundFormat;
    00033 struct iSndSysData;
    00034 struct iSndSysStreamCallback;
    00035
    00036 const size_t CS_SNDSYS_STREAM_UNKNOWN_LENGTH = (size_t)-1;
    00037
    00038 #define CS_SNDSYS_STREAM_PAUSED     0
    00039 #define CS_SNDSYS_STREAM_UNPAUSED   1
    00040
    00041 #define CS_SNDSYS_STREAM_DONTLOOP   0
    00042 #define CS_SNDSYS_STREAM_LOOP       1
    00043
    00045 enum
    00046 {
    00048   CS_SND3D_DISABLE=0,
    00050   CS_SND3D_RELATIVE,
    00052   CS_SND3D_ABSOLUTE
    00053 };
    00054
    00056 //
    00057 //  All audio is presented to the sound system in the form of a stream.
    00058 //  This interface is the minimal interface that all audio providing
    00059 //  objects must implement in order to produce sound.
    00060 //
    00061 struct iSndSysStream : public virtual iBase
    00062 {
    00064   SCF_INTERFACE(iSndSysStream,0,2,1);
    00065
    00067   //  This is not guaranteed to be useful for any particular purpose, different,
    00068   //  or even accurate.  This is mainly for diagnostic purposes.
    00069   virtual const char *GetDescription() = 0;
    00070
    00075   virtual const csSndSysSoundFormat *GetRenderedFormat() = 0;
    00076
    00078   virtual int Get3dMode() = 0;
    00079
    00086   virtual size_t GetFrameCount() = 0;
    00087
    00098   virtual size_t GetPosition() = 0;
    00099
    00105   virtual bool ResetPosition() = 0;
    00106
    00112   virtual bool SetPosition (size_t newposition) = 0;
    00113
    00126   virtual bool Pause() = 0;
    00127
    00132   virtual bool Unpause() = 0;
    00133
    00140   virtual int GetPauseState() = 0;
    00141
    00147   virtual bool SetLoopState(int loopstate) = 0;
    00148
    00153   virtual int GetLoopState() = 0;
    00154
    00159   virtual void SetPlayRatePercent(int percent) = 0;
    00160
    00165   virtual int GetPlayRatePercent() = 0;
    00166
    00171   virtual void SetAutoUnregister(bool autounreg) = 0;
    00172
    00177   virtual bool GetAutoUnregister() = 0;
    00178
    00183   virtual bool GetAutoUnregisterRequested() = 0;
    00184
    00185
    00200   virtual void AdvancePosition(size_t frame_delta) = 0;
    00201
    00238   virtual void GetDataPointers(size_t* position_marker, size_t max_requested_frames,
    00239         void **buffer1, size_t *buffer1_frames, void **buffer2, size_t *buffer2_frames) = 0;
    00240
    00247   virtual void InitializeSourcePositionMarker (size_t* position_marker) = 0;
    00248
    00254   virtual void ProcessNotifications() = 0;
    00255
    00257   virtual bool RegisterCallback(iSndSysStreamCallback *pCallback) = 0;
    00258
    00260   virtual bool UnregisterCallback(iSndSysStreamCallback *pCallback) = 0;
    00261
    00263   //   it's crossed.
    00264   virtual bool RegisterFrameNotification(size_t frame_number) = 0;
    00265 };
    00266
    00268 //
    00269 //  A component wishing to receive notification of Sound Stream events
    00270 //  should implement this interface, and call iSndSysStream::RegisterCallback()
    00271 //  to register with the stream of interest.
    00272 //
    00273 struct iSndSysStreamCallback : public virtual iBase
    00274 {
    00276   SCF_INTERFACE(iSndSysStreamCallback,0,1,0);
    00277
    00279   virtual void StreamLoopNotification() = 0;
    00280
    00282   virtual void StreamPauseNotification() = 0;
    00283
    00285   virtual void StreamUnpauseNotification() = 0;
    00286
    00288   virtual void StreamFrameNotification(size_t frame_number) = 0;
    00289 };
    00290
    00291
    00292
    00293
    00294
    00297 #endif // __CS_SNDSYS_STREAM_H__