我目前正试图弄清楚如何在Android 4.0中通过OpenMAX访问相机。文档对我来说不够,所以我目前很难为以下调用检索正确的XADataSource
。
(*_engine)->CreateMediaRecorder(_engine,
&_mediaRecorder, //pRecorder
nullptr, //pAudioSrc
XADataSource *, //pImageVideoSrc
XADataSink *, //pDataSnk
XAuint32, // numInterfaces
const XAInterfaceID *, //pInterfaceIds
const XAboolean *, //pInterfaceRequired
);
请不要让我使用,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
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
很抱歉,无法更好地格式化它,但如果您还没有检查过该文档,我建议您检查一下。
android的实现仅支持CreateMediaPlayer并播放MP2T H264 AAC流。
http://mobilepearls.com/labs/native-android-api/ndk/docs/openmaxal/