ACCodecDispatch.h

Revision 219, 9.2 kB (checked in by dconrad, 2 years ago)
WMA v1 and v2 decoder. Tested with samples in AVI. Refs #38

Line
1	/* Copyright: © Copyright 2005 Apple Computer, Inc. All rights reserved.
2
3	Disclaimer: IMPORTANT: This Apple software is supplied to you by Apple Computer, Inc.
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5	use, installation, modification or redistribution of this Apple software
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8
9	In consideration of your agreement to abide by the following terms, and subject
10	to these terms, Apple grants you a personal, non-exclusive license, under AppleÕs
11	copyrights in this original Apple software (the "Apple Software"), to use,
12	reproduce, modify and redistribute the Apple Software, with or without
13	modifications, in source and/or binary forms; provided that if you redistribute
14	the Apple Software in its entirety and without modifications, you must retain
15	this notice and the following text and disclaimers in all such redistributions of
16	the Apple Software. Neither the name, trademarks, service marks or logos of
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18	Apple Software without specific prior written permission from Apple. Except as
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21	may be infringed by your derivative works or by other works in which the Apple
22	Software may be incorporated.
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24	The Apple Software is provided by Apple on an "AS IS" basis. APPLE MAKES NO
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27	PURPOSE, REGARDING THE APPLE SOFTWARE OR ITS USE AND OPERATION ALONE OR IN
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31	CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
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35	(INCLUDING NEGLIGENCE), STRICT LIABILITY OR OTHERWISE, EVEN IF APPLE HAS BEEN
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37	*/
38	/*=============================================================================
39	ACCodecDispatch.h
40
41	=============================================================================*/
42	#if !defined(__ACCodecDispatch_h__)
43	#define __ACCodecDispatch_h__
44
45	//=============================================================================
46	// Includes
47	//=============================================================================
48
49	#include "ACCodec.h"
50	#include "ACCodecDispatchTypes.h"
51
52	//=============================================================================
53	// ACCodecDispatch
54	//
55	// A function template that implements a component dispatch routine for an
56	// AudioCodec in terms of an instance of a subclass of ACCodec.
57	// It is best used when called from the primary codec dispatcher like so:
58	//
59	// extern "C"
60	// ComponentResult FooCodecDispatch(ComponentParameters* inParameters, FooCodec* inThis)
61	// {
62	// return ACCodecDispatch(inParameters, inThis);
63	// }
64	//
65	// The reason this exists is to better encapuslate all the necessary code
66	// to do the dispatching without having to figure out what the C++ mangled
67	// name for the entry point to put in the exported symbols file.
68	//=============================================================================
69
70	template <class CodecClass>
71	ComponentResult ACCodecDispatch(ComponentParameters* inParameters, CodecClass* inThis)
72	{
73	ComponentResult theError = kAudioCodecNoError;
74
75	try
76	{
77	switch (inParameters->what)
78	{
79	// these selectors don't use the object pointer
80
81	case kComponentOpenSelect:
82	{
83	CodecClass* theCodec = new CodecClass();
84	SetComponentInstanceStorage(((AudioCodecOpenGluePB*)inParameters)->inCodec, (Handle)theCodec);
85	}
86	break;
87
88	case kComponentCloseSelect:
89	delete inThis;
90	break;
91
92	case kComponentCanDoSelect:
93	switch (((SInt16)&inParameters->params[1]))
94	{
95	case kComponentOpenSelect:
96	case kComponentCloseSelect:
97	case kComponentCanDoSelect:
98	case kComponentRegisterSelect:
99	case kComponentVersionSelect:
100	case kAudioCodecGetPropertyInfoSelect:
101	case kAudioCodecGetPropertySelect:
102	case kAudioCodecSetPropertySelect:
103	case kAudioCodecInitializeSelect:
104	case kAudioCodecAppendInputDataSelect:
105	case kAudioCodecProduceOutputDataSelect:
106	case kAudioCodecResetSelect:
107	theError = 1;
108	break;
109	};
110	break;
111
112	default:
113	// these selectors use the object pointer
114	if(inThis != NULL)
115	{
116	switch (inParameters->what)
117	{
118	case kComponentRegisterSelect:
119	if(!inThis->Register())
120	{
121	theError = componentDontRegister;
122	}
123	break;
124
125	case kComponentVersionSelect:
126	theError = inThis->GetVersion();
127	break;
128
129	case kAudioCodecGetPropertyInfoSelect:
130	{
131	AudioCodecGetPropertyInfoGluePB* thePB = (AudioCodecGetPropertyInfoGluePB*)inParameters;
132	UInt32 theSize = 0;
133	bool isWritable = false;
134
135	inThis->GetPropertyInfo(thePB->inPropertyID, theSize, isWritable);
136	if(thePB->outSize != NULL)
137	{
138	*(thePB->outSize) = theSize;
139	}
140	if(thePB->outWritable != NULL)
141	{
142	*(thePB->outWritable) = isWritable ? 1 : 0;
143	}
144	}
145	break;
146
147	case kAudioCodecGetPropertySelect:
148	{
149	AudioCodecGetPropertyGluePB* thePB = (AudioCodecGetPropertyGluePB*)inParameters;
150
151	if((thePB->ioPropertyDataSize != NULL) && (thePB->outPropertyData != NULL))
152	{
153	inThis->GetProperty(thePB->inPropertyID, *(thePB->ioPropertyDataSize), thePB->outPropertyData);
154	}
155	else
156	{
157	theError = paramErr;
158	}
159	}
160	break;
161
162	case kAudioCodecSetPropertySelect:
163	{
164	AudioCodecSetPropertyGluePB* thePB = (AudioCodecSetPropertyGluePB*)inParameters;
165
166	if(thePB->inPropertyData != NULL)
167	{
168	inThis->SetProperty(thePB->inPropertyID, thePB->inPropertyDataSize, thePB->inPropertyData);
169	}
170	else
171	{
172	theError = paramErr;
173	}
174	}
175	break;
176
177	case kAudioCodecInitializeSelect:
178	{
179	AudioCodecInitializeGluePB* thePB = (AudioCodecInitializeGluePB*)inParameters;
180
181	inThis->Initialize(thePB->inInputFormat, thePB->inOutputFormat, thePB->inMagicCookie, thePB->inMagicCookieByteSize);
182	}
183	break;
184
185	case kAudioCodecUninitializeSelect:
186	{
187	//AudioCodecUninitializeGluePB* thePB = (AudioCodecUninitializeGluePB*)inParameters;
188
189	inThis->Uninitialize();
190	}
191	break;
192
193	case kAudioCodecAppendInputDataSelect:
194	{
195	AudioCodecAppendInputDataGluePB* thePB = (AudioCodecAppendInputDataGluePB*)inParameters;
196
197	if((thePB->inInputData != NULL) && (thePB->ioInputDataByteSize != NULL))
198	{
199	if(thePB->ioNumberPackets != NULL)
200	{
201	inThis->AppendInputData(thePB->inInputData, (thePB->ioInputDataByteSize), (thePB->ioNumberPackets), thePB->inPacketDescription);
202	}
203	else
204	{
205	UInt32 theNumberPackets = 0;
206	inThis->AppendInputData(thePB->inInputData, *(thePB->ioInputDataByteSize), theNumberPackets, thePB->inPacketDescription);
207	}
208	}
209	else
210	{
211	theError = paramErr;
212	}
213	}
214	break;
215
216	case kAudioCodecProduceOutputDataSelect:
217	{
218	AudioCodecProduceOutputPacketsGluePB* thePB = (AudioCodecProduceOutputPacketsGluePB*)inParameters;
219
220	if((thePB->outOutputData != NULL) && (thePB->ioOutputDataByteSize != NULL) && (thePB->ioNumberPackets != NULL) && (thePB->outStatus != NULL))
221	{
222	(thePB->outStatus) = inThis->ProduceOutputPackets(thePB->outOutputData, (thePB->ioOutputDataByteSize), *(thePB->ioNumberPackets), thePB->outPacketDescription);
223	if(kAudioCodecProduceOutputPacketFailure == *(thePB->outStatus))
224	{
225	theError = paramErr;
226	}
227	}
228	else
229	{
230	theError = paramErr;
231	}
232	}
233	break;
234
235	case kAudioCodecResetSelect:
236	{
237	//AudioCodecResetGluePB* thePB = (AudioCodecResetGluePB*)inParameters;
238
239	inThis->Reset();
240	}
241	break;
242
243	default:
244	theError = badComponentSelector;
245	break;
246	};
247	}
248	else
249	{
250	theError = paramErr;
251	}
252	break;
253	};
254	}
255	catch(ComponentResult inErrorCode)
256	{
257	theError = inErrorCode;
258	}
259	catch(...)
260	{
261	theError = kAudioCodecUnspecifiedError;
262	}
263
264	return theError;
265	}
266
267	#endif

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