ch5p5_mixervolume.cpp

游戏音频程序设计-Beginning.Game.Audio.Programming

// Ch5p5_MixerVolume.cpp : Defines the entry point for the console application.
//

#include <iostream>
#include <sstream>
#include <string>
#include <math.h>
#include <conio.h>
#include <windows.h>
#include <mmreg.h>

#include "dsound.h"
#include "dxerr8.h"
#include "AudioEngine/dxutil.h"
#include "AudioEngine/AudioEngine.h"

using namespace std;
using namespace AudioEngine;

CAudioManager g_AudioMgr;
CAudioManager *AudioEngine::GetAudioManager() { return(&g_AudioMgr); }

void Exit(int errorcode)
{
  #ifdef _DEBUG
  cout << endl << endl << "(Program ended, press a key to exit.)";
  // so that the console window doesn't disappear before we have
  // a chance to look at it.
  getch(); 
#endif

  exit(errorcode);
}

HWND GetConsoleWindowHandle()
{
  char title[512];
  HWND hWnd;
 
  GetConsoleTitle(title, sizeof(title));
  hWnd = FindWindow(NULL, title);
  return(hWnd);
}

void main(int argc, char* argv[])
{
  
  try {

    // initialize audio manager
    cout << "Initializing Audio Manager..." << endl;
    g_AudioMgr.Init(GetConsoleWindowHandle());

    // load a WAV file
    cout << "Loading WAV File..." << endl;
    CSoundPtr snd = g_AudioMgr.LoadSound("test.wav");
    
    // full volume on performance
    GetAudioManager()->SetVolume(CVolume(0));

    cout << "Performance volume at full..." << endl;

    CMixer &mixer = GetAudioManager()->GetMixer();

    // save original mixer volumes
    int oldmaster = mixer.GetVolume(CMixer::Master);
    int oldwaveout = mixer.GetVolume(CMixer::WaveOut);

    // set mixer volume to full - this is rude but for this example program it's OK.
    // *never* do this in a real game.
    mixer.SetVolume(CMixer::Master, 65535);
    mixer.SetVolume(CMixer::WaveOut, 65535);

    cout << "Wave out Mixer volume at full..." << endl;
    cout << "Master Mixer volume at full..." << endl;
    cout << "(you might want to turn down your speakers a little)" << endl;
    
    mixer.Mute(CMixer::Master);
    mixer.Mute(CMixer::WaveOut);
    cout << "Muted!" << endl;
    cout << "Press a key to unmute and begin sound playback." << endl;

    getch();
    mixer.UnMute(CMixer::Master);
    mixer.UnMute(CMixer::WaveOut);
    cout << "Unmuted!" << endl;
    

    cout << "Playing sound at full volume..." << endl;
    snd->SetVolume(0);
    snd->Play();
    Sleep(500); while (snd->IsPlaying()) Sleep(500);

    // mixer volume to half
    mixer.SetVolume(CMixer::WaveOut, 65535/2);
    cout << endl << endl << "Wave out Mixer volume at half..." << endl << endl;

    cout << "Playing sound at full volume..." << endl;
    snd->SetVolume(0);
    snd->Play();
    Sleep(500); while (snd->IsPlaying()) Sleep(500);

    // uninit audio manager
    cout << endl << "UnIniting audio manager..." << endl;
    g_AudioMgr.UnInit();

    // set mixer volumes back to what they were
    mixer.SetVolume(CMixer::Master, oldmaster);
    mixer.SetVolume(CMixer::WaveOut, oldwaveout);
  } 
  catch(CError &e) {
    MessageBox(GetConsoleWindowHandle(), e.GetMessageBoxString().c_str(), "Ch5p5_MixerVolume", MB_ICONSTOP);
    Exit(-1);
  }
  catch(...) {
    MessageBox(GetConsoleWindowHandle(), "This sample program has encountered an error and must close.", "Ch5p5_MixerVolume", MB_ICONSTOP);
    Exit(-1);
  }
  Exit(0);
}