5f6ca4f519
These are new content files for the partner development kit that will be hosted off of source.android.com externally. Automated import of CL 148105
76 lines
2.9 KiB
Plaintext
Executable File
76 lines
2.9 KiB
Plaintext
Executable File
page.title=Camera
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pdk.version=1.0
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@jd:body
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<a name="toc"/>
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<div style="padding:10px">
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<a href="#androidCameraIntroduction">Introduction</a><br/>
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<a href="#androidCameraBuildingDriver">Building a Camera Library</a><br/>
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<a href="#androidCameraSequenceDiagrams">Sequence Diagrams</a><br/><div style="padding-left:40px">
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<a href="#androidCameraSequenceDiagramsPreview">Preview</a><br/>
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<a href="#androidCameraSequenceDiagramsTakePic">Taking a Picture</a><br/></div>
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<a href="#androidCameraInterfaceIntro">Interface</a><br/></div></font></div>
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<a name="androidCameraIntroduction"></a><h2>Introduction</h2>
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<p>Android's camera subsystem connects the camera application to the application framework and user space libraries, which in turn communicate with the camera hardware layer that operates the physical camera.</p>
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<p>The diagram below illustrates the structure of the camera subsystem.</p>
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<p><img src="images/androidCameraArchitecture.gif"></p>
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<a name="androidCameraBuildingDriver"></a><h2>Building a Camera Library</h2>
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<p>To implement a camera driver, create a shared library that implements the interface defined in <code>CameraHardwareInterface.h</code>. You must name your shared library <code>libcamera.so</code> so that it will get loaded from <code>/system/lib</code> at runtime. Place libcamera sources and <code>Android.mk</code> in <code>partner/acme/chipset_or_board/libcamera/</code>.</p>
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<p>The following stub <code>Android.mk</code> file ensures that <code>libcamera</code> compiles and links to the appropriate libraries:</p>
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<pre class="prettify">
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LOCAL_PATH := $(call my-dir)
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include $(CLEAR_VARS)
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LOCAL_MODULE := libcamera
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LOCAL_SHARED_LIBRARIES := \
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libutils \
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librpc \
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liblog
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LOCAL_SRC_FILES += MyCameraHardware.cpp
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LOCAL_CFLAGS +=
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LOCAL_C_INCLUDES +=
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LOCAL_STATIC_LIBRARIES += \
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libcamera-common \
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libclock-rpc \
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libcommondefs-rpc
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include $(BUILD_SHARED_LIBRARY)
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</pre>
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<a name="androidCameraSequenceDiagrams"></a><h2>Sequence Diagrams</h2>
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<a name="androidCameraSequenceDiagramsPreview"></a><h3>Preview</h3>
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<p>The following diagram illustrates the sequence of function calls and actions necessary for your camera to preview.</p>
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<img src="images/cameraPreview.jpg">
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<a name="androidCameraSequenceDiagramsTakePic"></a><h3>Taking a Picture</h3>
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<p>The following diagram illustrates the sequence of function calls and actions necessary for your camera to take a picture.</p>
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<img src="images/cameraTakePicture.jpg">
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<a name="androidCameraInterfaceIntro"></a><h2>Interface</h2>
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<p class="note"><strong>Note</strong>: This document relies on some Doxygen-generated content that appears in an iFrame below. To return to the Doxygen default content for this page, <a href="camera.html">click here</a>.</p>
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<iframe onLoad="resizeDoxFrameHeight();" src="CameraHardwareInterface_8h.html" scrolling="no" scroll="no" id="doxygen" marginwidth="0" marginheight="0" frameborder="0" style="width:100%;"></iframe>
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