mciwav.cpp

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//----------------------------------------------------------------------------
// ObjectWindows
// Copyright (c) 1995, 1996 by Borland International, All Rights Reserved
//
/// \file
///  Implements TMciWaveAudio
//----------------------------------------------------------------------------
#include <owl/pch.h>
#include <owl/mci.h>
 
 
namespace owl {
 
OWL_DIAGINFO;
 
//
// Initialize the structure for the waveaudio device.
//
static void InitParms(MCI_OPEN_PARMS& parms, uint32& command, LPCTSTR deviceName,
  LPCTSTR elementName = 0, uint16 id = 0)
{
  command = (id == 0) ? MCI_OPEN_TYPE : MCI_OPEN_TYPE_ID;
  if (elementName != nullptr)  {
    command |= MCI_OPEN_ELEMENT;
    parms.lpstrElementName = elementName;
  }
 
  parms.lpstrDeviceType = (id == 0) ? deviceName :
    reinterpret_cast<LPTSTR>(static_cast<UINT_PTR>(MkUint32(static_cast<uint16>(reinterpret_cast<UINT_PTR>(deviceName)), id)));
}
 
//
/// Constructs an MCI waveaudio (.WAV) device.
//
TMciWaveAudio::TMciWaveAudio(LPCTSTR elementName, LPCTSTR deviceName, uint16 id)
{
  MCI_OPEN_PARMS parms;
  uint32 command;
  InitParms(parms, command, deviceName == nullptr ? _T("waveaudio") : deviceName,
            elementName, id);
  Open(parms, command);
}
 
//
/// String-aware overload
//
TMciWaveAudio::TMciWaveAudio(const tstring& elementName, const tstring& deviceName, uint16 id)
{
  MCI_OPEN_PARMS parms;
  uint32 command;
  InitParms(parms, command, deviceName.c_str(), elementName.c_str(), id);
  Open(parms, command);
}
 
//
/// Plays the file on the waveaudio device.
//
MCIERROR
TMciWaveAudio::Play(DWORD_PTR flags, DWORD from, DWORD to)
{
  MCI_PLAY_PARMS parms;
 
  if (flags & MCI_NOTIFY)
    parms.dwCallback = reinterpret_cast<DWORD_PTR>(GetCallbackWindow());
 
  flags |= MCI_FROM;
  parms.dwFrom = from;
 
  if (to != 0) {
    flags |= MCI_TO;
    parms.dwTo = to;
  }
 
  return TMci::Play(parms, flags);
}
 
} // OWL namespace
/* ========================================================================== */