Source code of Windows XP (NT5)
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/*==========================================================================
* * Copyright (c) 1995 - 1997 Microsoft Corporation. All Rights Reserved. * * File: dsutil.cpp * Content: Routines for dealing with sounds from resources * * ***************************************************************************/
#ifdef __cplusplus
extern "C" {#endif
///////////////////////////////////////////////////////////////////////////////
//
// DSLoadSoundBuffer Loads an IDirectSoundBuffer from a Win32 resource in
// the current application.
//
// Params:
// pDS -- Pointer to an IDirectSound that will be used to create
// the buffer.
//
// lpName -- Name of WAV resource to load the data from. Can be a
// resource id specified using the MAKEINTRESOURCE macro.
//
// Returns an IDirectSoundBuffer containing the wave data or NULL on error.
//
// example:
// in the application's resource script (.RC file)
// Turtle WAV turtle.wav
//
// some code in the application:
// IDirectSoundBuffer *pDSB = DSLoadSoundBuffer(pDS, "Turtle");
//
// if (pDSB)
// {
// IDirectSoundBuffer_Play(pDSB, 0, 0, DSBPLAY_TOEND);
// /* ... */
//
///////////////////////////////////////////////////////////////////////////////
IDirectSoundBuffer *DSLoadSoundBuffer(IDirectSound *pDS, LPCTSTR lpName);
///////////////////////////////////////////////////////////////////////////////
//
// DSReloadSoundBuffer Reloads an IDirectSoundBuffer from a Win32 resource in
// the current application. normally used to handle
// a DSERR_BUFFERLOST error.
// Params:
// pDSB -- Pointer to an IDirectSoundBuffer to be reloaded.
//
// lpName -- Name of WAV resource to load the data from. Can be a
// resource id specified using the MAKEINTRESOURCE macro.
//
// Returns a BOOL indicating whether the buffer was successfully reloaded.
//
// example:
// in the application's resource script (.RC file)
// Turtle WAV turtle.wav
//
// some code in the application:
// TryAgain:
// HRESULT hres = IDirectSoundBuffer_Play(pDSB, 0, 0, DSBPLAY_TOEND);
//
// if (FAILED(hres))
// {
// if ((hres == DSERR_BUFFERLOST) &&
// DSReloadSoundBuffer(pDSB, "Turtle"))
// {
// goto TryAgain;
// }
// /* deal with other errors... */
// }
//
///////////////////////////////////////////////////////////////////////////////
BOOL DSReloadSoundBuffer(IDirectSoundBuffer *pDSB, LPCTSTR lpName);
///////////////////////////////////////////////////////////////////////////////
//
// DSGetWaveResource Finds a WAV resource in a Win32 module.
//
// Params:
// hModule -- Win32 module handle of module containing WAV resource.
// Pass NULL to indicate current application.
//
// lpName -- Name of WAV resource to load the data from. Can be a
// resource id specified using the MAKEINTRESOURCE macro.
//
// ppWaveHeader-- Optional pointer to WAVEFORMATEX * to receive a pointer to
// the WAVEFORMATEX header in the specified WAV resource.
// Pass NULL if not required.
//
// ppbWaveData -- Optional pointer to BYTE * to receive a pointer to the
// waveform data in the specified WAV resource. Pass NULL if
// not required.
//
// pdwWaveSize -- Optional pointer to DWORD to receive the size of the
// waveform data in the specified WAV resource. Pass NULL if
// not required.
//
// Returns a BOOL indicating whether a valid WAV resource was found.
//
///////////////////////////////////////////////////////////////////////////////
BOOL DSGetWaveResource(HMODULE hModule, LPCTSTR lpName, WAVEFORMATEX **ppWaveHeader, BYTE **ppbWaveData, DWORD *pdwWaveSize);
///////////////////////////////////////////////////////////////////////////////
//
// HSNDOBJ Handle to a SNDOBJ object.
//
// SNDOBJs are implemented in dsutil as an example layer built on top
// of DirectSound.
//
// A SNDOBJ is generally used to manage individual
// sounds which need to be played multiple times concurrently. A
// SNDOBJ represents a queue of IDirectSoundBuffer objects which
// all refer to the same buffer memory.
//
// A SNDOBJ also automatically reloads the sound resource when
// DirectSound returns a DSERR_BUFFERLOST
//
///////////////////////////////////////////////////////////////////////////////
#ifndef _HSNDOBJ_DEFINED
DECLARE_HANDLE32(HSNDOBJ);#endif
///////////////////////////////////////////////////////////////////////////////
//
// SndObjCreate Loads a SNDOBJ from a Win32 resource in
// the current application.
//
// Params:
// pDS -- Pointer to an IDirectSound that will be used to create
// the SNDOBJ.
//
// lpName -- Name of WAV resource to load the data from. Can be a
// resource id specified using the MAKEINTRESOURCE macro.
//
// iConcurrent -- Integer representing the number of concurrent playbacks of
// to plan for. Attempts to play more than this number will
// succeed but will restart the least recently played buffer
// even if it is not finished playing yet.
//
// Returns an HSNDOBJ or NULL on error.
//
// NOTES:
// SNDOBJs automatically restore and reload themselves as required.
//
///////////////////////////////////////////////////////////////////////////////
HSNDOBJ SndObjCreate(IDirectSound *pDS, LPCTSTR lpName, int iConcurrent);
///////////////////////////////////////////////////////////////////////////////
//
// SndObjDestroy Frees a SNDOBJ and releases all of its buffers.
//
// Params:
// hSO -- Handle to a SNDOBJ to free.
//
///////////////////////////////////////////////////////////////////////////////
void SndObjDestroy(HSNDOBJ hSO);
///////////////////////////////////////////////////////////////////////////////
//
// SndObjPlay Plays a buffer in a SNDOBJ.
//
// Params:
// hSO -- Handle to a SNDOBJ to play a buffer from.
//
// dwPlayFlags -- Flags to pass to IDirectSoundBuffer::Play. It is not
// legal to play an SndObj which has more than one buffer
// with the DSBPLAY_LOOPING flag. Pass 0 to stop playback.
//
///////////////////////////////////////////////////////////////////////////////
BOOL SndObjPlay(HSNDOBJ hSO, DWORD dwPlayFlags);
///////////////////////////////////////////////////////////////////////////////
//
// SndObjStop Stops one or more buffers in a SNDOBJ.
//
// Params:
// hSO -- Handle to a SNDOBJ to play a buffer from.
//
///////////////////////////////////////////////////////////////////////////////
BOOL SndObjStop(HSNDOBJ hSO);
///////////////////////////////////////////////////////////////////////////////
//
// SndObjGetFreeBuffer returns one of the cloned buffers that is
// not currently playing
//
// Params:
// hSO -- Handle to a SNDOBJ
//
// NOTES:
// This function is provided so that callers can set things like pan etc
// before playing the buffer.
//
// EXAMPLE:
// ...
//
///////////////////////////////////////////////////////////////////////////////
IDirectSoundBuffer *SndObjGetFreeBuffer(HSNDOBJ hSO);
///////////////////////////////////////////////////////////////////////////////
//
// helper routines
//
///////////////////////////////////////////////////////////////////////////////
BOOL DSFillSoundBuffer(IDirectSoundBuffer *pDSB, BYTE *pbWaveData, DWORD dwWaveSize);BOOL DSParseWaveResource(void *pvRes, WAVEFORMATEX **ppWaveHeader, BYTE **ppbWaveData, DWORD *pdwWaveSize);
#ifdef __cplusplus
}#endif
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