我目前正在尝试弄清楚如何在 Android 4.0 中通过 OpenMAX 访问相机。该文档对我来说还不够，所以我目前正在努力解决如何检索正确的问题XADataSource对于以下调用。
(*_engine)->CreateMediaRecorder(_engine,
&_mediaRecorder, //pRecorder
nullptr, //pAudioSrc
XADataSource *, //pImageVideoSrc
XADataSink *, //pDataSnk
XAuint32, // numInterfaces
const XAInterfaceID *, //pInterfaceIds
const XAboolean *, //pInterfaceRequired
);
请饶恕我只需使用Java-“答案”。
这基本上是 XADataSource 的定义，取自http://www.khronos.org/registry/omxal/specs/OpenMAX_AL_1_1_Specification.pdf http://www.khronos.org/registry/omxal/specs/OpenMAX_AL_1_1_Specification.pdf
typedef struct XADataSource_ {
void * pLocator;
void * pFormat;
} XADataSource;
字段包括：
Field Description
pLocator Pointer to the specified data locator structure. This may point to any of the following structures.
XADataLocator_Address
XADataLocator_IODevice
XADataLocator_URI
XADataLocator_MediaObject
XADataLocator_Null
XADataLocator_ContentPipe
The first field of each of these structures includes the 32 bit locatorType field, which identifies
the locator type (see XA_DATALOCATOR definitions) and hence the structure pointed to.
Note: The available XA_DATALOCATOR definitions may be extended through an API extension.
pFormat A pointer to the specified format structure. This may point to any of the following structures.
XADataFormat_PCM (Deprecated)
XADataFormat_PCM_EX
XADataFormat_MIME
XADataFormat_RawImage
The first field of each of these structures includes the 32 bit formatType field, which identifies the
format type (XA_DATAFORMAT definitions) and hence the structure pointed to. pFormat is ignored
if pLocator is XADataLocator_IODevice
抱歉，无法更好地格式化它，但如果您还没有这样做，我建议您还是检查一下该文档。
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