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SoundCard.cpp
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1 /* Project nGenEx
2  Destroyer Studios LLC
3  Copyright © 1997-2004. All Rights Reserved.
4 
5  SUBSYSTEM: nGenEx.lib
6  FILE: SoundCard.cpp
7  AUTHOR: John DiCamillo
8 
9 
10  OVERVIEW
11  ========
12  Abstract sound card class
13 */
14 
15 #include "MemDebug.h"
16 #include "SoundCard.h"
17 #include "Sound.h"
18 
19 // +--------------------------------------------------------------------+
20 
21 DWORD WINAPI SoundCardUpdateProc(LPVOID link);
22 
23 // +--------------------------------------------------------------------+
24 
25 SoundCard::SoundCard()
26 : status(SC_UNINITIALIZED), hthread(0), shutdown(false)
27 {
28  DWORD thread_id = 0;
29  hthread = CreateThread(0, 4096, SoundCardUpdateProc,
30  (LPVOID) this, 0, &thread_id);
31 }
32 
33 // +--------------------------------------------------------------------+
34 
35 SoundCard::~SoundCard()
36 {
37  shutdown = true;
38 
39  WaitForSingleObject(hthread, 500);
40  CloseHandle(hthread);
41  hthread = 0;
42 
43  sounds.destroy();
44  status = SC_UNINITIALIZED;
45 }
46 
47 // +--------------------------------------------------------------------+
48 
49 DWORD WINAPI SoundCardUpdateProc(LPVOID link)
50 {
51  SoundCard* card = (SoundCard*) link;
52 
53  if (card)
54  return card->UpdateThread();
55 
56  return (DWORD) E_POINTER;
57 }
58 
59 // +--------------------------------------------------------------------+
60 
61 DWORD
62 SoundCard::UpdateThread()
63 {
64  while (!shutdown) {
65  Update();
66  Sleep(50);
67  }
68 
69  return 0;
70 }
71 
72 // +--------------------------------------------------------------------+
73 
74 void
75 SoundCard::Update()
76 {
77  AutoThreadSync a(sync);
78 
79  ListIter<Sound> iter = sounds;
80  while (++iter) {
81  Sound* s = iter.value();
82 
83  s->Update();
84 
85  if (s->GetStatus() == Sound::DONE &&
86  !(s->GetFlags() & Sound::LOCKED)) {
87 
88  delete iter.removeItem();
89  }
90  }
91 }
92 
93 // +--------------------------------------------------------------------+
94 
95 void
96 SoundCard::AddSound(Sound* s)
97 {
98  AutoThreadSync a(sync);
99 
100  if (!sounds.contains(s))
101  sounds.append(s);
102 }
103