Jamoma API  0.6.0.a19
ComponentBase.h
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41 #ifndef __ComponentBase_h__
42 #define __ComponentBase_h__
43 
44 #include <new>
45 #include "CADebugMacros.h"
46 
47 #if !defined(__COREAUDIO_USE_FLAT_INCLUDES__)
48  #include <CoreAudio/CoreAudioTypes.h>
49  #include <AudioUnit/AudioUnit.h>
50 
51  #if !TARGET_OS_IPHONE
52  #include <CoreServices/../Frameworks/CarbonCore.framework/Headers/Components.h>
53 
54  #if (MAC_OS_X_VERSION_MAX_ALLOWED <= MAC_OS_X_VERSION_10_5)
55  #define AudioComponentInstance ComponentInstance
56  #define AudioComponentDescription ComponentDescription
57  #define AudioComponent Component
58  #define CA_DO_NOT_USE_AUDIO_COMPONENT 1
59  #endif
60  #endif
61 
62  #if MAC_OS_X_VERSION_MAX_ALLOWED <= MAC_OS_X_VERSION_10_4
63  typedef Float32 AudioUnitParameterValue;
64  #endif
65  #if COREAUDIOTYPES_VERSION < 1051
66  typedef Float32 AudioUnitSampleType;
67  #endif
68 
69  #include <pthread.h>
70 #else
71  #include "CoreAudioTypes.h"
72  #include "Components.h"
73  #include "AudioUnit.h"
74  #include "CAGuard.h"
75 #endif
76 
77 #ifndef COMPONENT_THROW
78  #if VERBOSE_COMPONENT_THROW
79  #define COMPONENT_THROW(throw_err) \
80  do { DebugMessage(#throw_err); throw static_cast<OSStatus>(throw_err); } while (0)
81  #else
82  #define COMPONENT_THROW(throw_err) \
83  throw static_cast<OSStatus>(throw_err)
84  #endif
85 #endif
86 
87 #define COMPONENT_CATCH \
88  catch (std::bad_alloc &) { result = -108/*memFullErr*/; } \
89  catch (OSStatus catch_err) { result = catch_err; } \
90  catch (OSErr catch_err) { result = catch_err; } \
91  catch (...) { result = -1; }
92 
93 class ComponentInitLocker
94 {
95 #if TARGET_OS_MAC
96 public:
97  ComponentInitLocker() { pthread_mutex_lock(&sComponentOpenMutex); }
98  ~ComponentInitLocker() { pthread_mutex_unlock(&sComponentOpenMutex); }
99 private:
100  static pthread_mutex_t sComponentOpenMutex;
101 #elif TARGET_OS_WIN32
102 public:
103  bool sNeedsUnlocking;
104  ComponentInitLocker() { sNeedsUnlocking = sComponentOpenGuard.Lock(); }
105  ~ComponentInitLocker() { if(sNeedsUnlocking) { sComponentOpenGuard.Unlock(); } }
106 private:
107  static CAGuard sComponentOpenGuard;
108 #endif
109 };
110 
111 #if !TARGET_OS_IPHONE
112  /*! @class ComponentEntryPoint */
113 template <class Class>
114 class ComponentEntryPoint {
115 public:
116  /*! @method Dispatch */
117  static OSStatus Dispatch(ComponentParameters *params, Class *obj)
118  {
119  OSStatus result = noErr;
120 
121  try {
122  if (params->what == kComponentOpenSelect) {
123  // solve a host of initialization thread safety issues.
124  ComponentInitLocker lock;
125 
126  ComponentInstance ci = (ComponentInstance)(params->params[0]);
127  Class *This = new Class((AudioComponentInstance)ci);
128  This->PostConstructor(); // allows base class to do additional initialization
129  // once the derived class is fully constructed
130 
131  #if !CA_AU_IS_ONLY_PLUGIN
132  SetComponentInstanceStorage(ci, (Handle)This);
133  #endif
134  } else
135  result = Class::ComponentEntryDispatch(params, obj);
136  }
137  COMPONENT_CATCH
138 
139  return result;
140  }
141 
142  /*! @method Register */
143  static Component Register(OSType compType, OSType subType, OSType manufacturer)
144  {
145  ComponentDescription description = {compType, subType, manufacturer, 0, 0};
146  Component component = RegisterComponent(&description, (ComponentRoutineUPP) Dispatch, registerComponentGlobal, NULL, NULL, NULL);
147  if (component != NULL) {
148  SetDefaultComponent(component, defaultComponentAnyFlagsAnyManufacturerAnySubType);
149  }
150  return component;
151  }
152 };
153 
154 #if TARGET_OS_MAC && TARGET_CPU_PPC && !TARGET_RT_MAC_MACHO
155  // for OS 9, a PPC native component's entry point must be a routine descriptor
156  #define COMPONENT_ENTRY(Class) \
157  extern "C" OSStatus Class##Entry(ComponentParameters *params, Class *obj); \
158  extern "C" OSStatus Class##Entry(ComponentParameters *params, Class *obj) { \
159  return ComponentEntryPoint<Class>::Dispatch(params, obj); \
160  } \
161  \
162  struct RoutineDescriptor Class##EntryRD = \
163  BUILD_ROUTINE_DESCRIPTOR((kPascalStackBased | RESULT_SIZE (kFourByteCode) | \
164  STACK_ROUTINE_PARAMETER (1, kFourByteCode) | \
165  STACK_ROUTINE_PARAMETER (2, kFourByteCode)), Class##Entry);
166 #else
167  #define COMPONENT_ENTRY(Class) \
168  extern "C" OSStatus Class##Entry(ComponentParameters *params, Class *obj); \
169  extern "C" OSStatus Class##Entry(ComponentParameters *params, Class *obj) { \
170  return ComponentEntryPoint<Class>::Dispatch(params, obj); \
171  }
172 #endif
173 
174  /*! @class ComponentRegistrar */
175 template <class Class, OSType Type, OSType Subtype, OSType Manufacturer>
176 class ComponentRegistrar {
177 public:
178  /*! @ctor ComponentRegistrar */
179  ComponentRegistrar() { ComponentEntryPoint<Class>::Register(Type, Subtype, Manufacturer); }
180 };
181 
182 #define COMPONENT_REGISTER(Class,Type,Subtype,Manufacturer) \
183  static ComponentRegistrar<Class, Type, Subtype, Manufacturer> gRegistrar##Class
184 #else
185 #define COMPONENT_ENTRY(Class)
186 #define COMPONENT_REGISTER(Class)
187 #endif // !TARGET_OS_IPHONE
188 
189 
190  /*! @class ComponentBase */
191 class ComponentBase {
192 public:
193  // classic MacErrors
194  enum { noErr = 0, paramErr = -50, memFullErr = -108 };
195 
196  /*! @ctor ComponentBase */
197  ComponentBase(AudioComponentInstance inInstance) : mComponentInstance(inInstance) { }
198  /*! @dtor ~ComponentBase */
199  virtual ~ComponentBase();
200 
201  /*! @method PostConstructor */
202  virtual void PostConstructor();
203 
204  /*! @method PreDestructor */
205  virtual void PreDestructor();
206 
207 #if !TARGET_OS_IPHONE
208  /*! @method Version */
209  virtual OSStatus Version();
210 
211  /*! @method ComponentEntryDispatch */
212  static OSStatus ComponentEntryDispatch(ComponentParameters *p, ComponentBase *This);
213 #endif
214 
215  /*! @method GetComponentInstance */
216  AudioComponentInstance GetComponentInstance() const { return mComponentInstance; }
217 
218  /*! @method GetComponentDescription */
219  AudioComponentDescription GetComponentDescription() const;
220 
221 protected:
222  /*! @var mComponentInstance */
223  AudioComponentInstance mComponentInstance;
224 };
225 
226 #endif // __ComponentBase_h__