Chip Special: HTML & Java/Chip-Special_1997-01_HTML-a-Java.bin/javasdk/sdk-java.exe/SDKJava.cab/Samples/directX/dSound/dSoundTest/dSoundLIB.java

Java Source | 1996-10-10 | 6.0 KB | 234 lines

//
//
//  Copyright (C) 1996 Microsoft Corporation. All Rights Reserved.
//
//  File: dSoundLIB.java
//
//  Description: Class does basic play, stop of wav files.
//               See dSoundTest.java for sample usage...
//


import java.awt.*;
import com.ms.com.*;
import com.ms.directX.*;

class dSoundLIB implements ddConstants
{
   // got these sizeof() values from a C++ windows app
   public final int sizeofWAVEFORMAT   = 14;
   public final int sizeofWAVEFORMATEX = 18;
   public final int sizeofDSBUFFERDESC = 20;
   public final int sizeofDSCAPS       = 96;
   public final int sizeofDSBCAPS      = 20;


   // hidden class variablez
   private dSound         ds;
   private dSoundBuffer   m_dsBuffer;
   private DSBufferDesc   m_dsBufferDesc = null;
   private DSResourceDesc m_dsrDesc;

   private boolean        m_bSoundLoaded;
   private WaveFormatEx   m_waveFormat;
   private dSoundResource m_dsr;
   private int            m_PlayLoopFlag;

   //---------------------------------------
   //---------------------------------------

   private void DebugMsg (String s)
   {
      System.out.println ("dSoundLIB: " + s);
   }

   //---------------------------------------

   public dSound GetDSoundObject()
   {
      return ds;
   }

   //---------------------------------------

   public dSoundResource GetDSoundResourceObject()
   {
      return m_dsr;
   }

   //---------------------------------------

   public dSoundBuffer GetDSoundBufferObject()
   {
      return m_dsBuffer;
   }

   //---------------------------------------

   public int GetBufferSize()
   {
      return m_dsBufferDesc.dwBufferBytes;
   }

   //---------------------------------------

   public dSoundLIB (int hWnd, int nLevel) throws Exception
      // constructor.  Note: if this fails, it will throw an Exception
   {
      DebugMsg ("constructor: hWnd: " + hWnd + " coopLevel: " + nLevel);
      m_bSoundLoaded = false;

      try
      {
         DebugMsg ("Calling new dSound()....");
         DebugMsg ("   Note: If your app stops here, you need to register DIRECT.DLL");
         ds = new dSound();

         // note: if there is no sound device available, this will throw an
         // exception.
         DebugMsg ("Calling SetCooperativeLevel " + nLevel);
         DebugMsg ("   Note: If your app stops here, you don't have a sound device");
         try
         {
            ds.SetCooperativeLevel (hWnd, nLevel);
         }
         catch (Exception e)
         {
            throw new Exception ("dSoundLIB: SetCooperativeLevel() failed");
         }
      }
      catch (Exception e)
      {
         DebugMsg ("Constructor caught exception \n   " + e);
         throw new Exception ("dSoundLIB: " + e);
      }

      DebugMsg ("Constructor finished");
   }

   //---------------------------------------

   public boolean PlayWave (String sFilename, boolean bLoop)
   {
      DebugMsg ("PlayWave [" + sFilename + "]");
      if (! LoadWaveFile (sFilename))
         return false;

      // save the play flag for use w/ StopWave() below
      if (bLoop)
         m_PlayLoopFlag = DSBPLAY_LOOPING;
      else
         m_PlayLoopFlag = 0;

      try
      {
         m_dsBuffer.Play (0, 0, m_PlayLoopFlag);
      }
      catch (Exception e)
      {
         DebugMsg ("dSoundBuffer::Play() threw Exception \n" + e);
         return false;
      }

      return true;
   }

   //---------------------------------------

   public boolean PlayWave ()
      //
      // this one restarts a wave file previously stopped with StopWave()
      //
   {
      try
      {
         m_dsBuffer.Play (0, 0, m_PlayLoopFlag);
      }
      catch (Exception e)
      {
         DebugMsg ("dSoundBuffer::Play() threw Exception \n" + e);
         return false;
      }

      return true;
   }

   //---------------------------------------

   public boolean PlayWave (int nFlag)
      //
      // this one plays a wave file with the nFlag play parameter.
      //
   {
      try
      {
         m_dsBuffer.Play (0, 0, nFlag);
      }
      catch (Exception e)
      {
         DebugMsg ("dSoundBuffer::Play() threw Exception \n" + e);
         return false;
      }

      return true;
   }

   //---------------------------------------

   public boolean StopWave()
   {
      try
      {
         m_dsBuffer.Stop();
      }
      catch (Exception e)
      {
         DebugMsg ("dSoundBuffer::Stop() threw Exception \n" + e);
         return false;
      }

      return true;
   }

   //---------------------------------------

   public boolean LoadWaveFile (String sFilename)

   {
      DebugMsg ("LoadWaveFile ============");

      try
      {
         m_dsrDesc    = new DSResourceDesc();
         m_dsr        = new dSoundResource();

         // this guy returns us the size of the wave file in
         // dwBufferBytes
         m_waveFormat = m_dsr.LoadWaveFile (sFilename, m_dsrDesc);

         // create the sound buffer
         m_dsBufferDesc                = new DSBufferDesc();
         m_dsBufferDesc.dwSize         = sizeofDSBUFFERDESC;

         // need to specify DSBCAPS_CTRLDEFAULT so you can control the
         //    volume, pan, frequency.
         m_dsBufferDesc.dwFlags        = DSBCAPS_STATIC | DSBCAPS_CTRLDEFAULT;
         m_dsBufferDesc.dwBufferBytes  = m_dsrDesc.dwBufferBytes;

         m_dsBuffer = ds.CreateSoundBuffer (m_dsBufferDesc, m_waveFormat, null);

         // get the sound data from the internal memory from LoadWaveFile
         //  to the sound buffer.  The flags are the same as those used
         //  for Lock()
         m_dsBuffer.TransferToSoundBuffer (m_dsrDesc, 0);

         return m_bSoundLoaded = true;
      }
      catch (Exception e)
      {
         DebugMsg ("LoadWaveFile caught exception \n   " + e);
         return false;
      }
   }
}