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+
+<html>
+<head>
+<meta http-equiv="content-type" content="text/html; charset=utf-8"/>
+<title>Android - Porting Guide</title>
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+
+ <h1>Android Platform Development Kit</h1>
+ <ul class="gc-topnav-tabs">
+ <li id="sdk_link"> <a href="http://code.google.com/android/index.html" title="Android Software Development Kit">SDK</a> </li>
+ <li id="docs_link"> <a href="index.html" title="Official Android documentation">Docs</a> </li>
+ <li id="faq_link"> <a href="http://code.google.com/android/kb/index.html" title="Answers to frequently asked questions about Android">FAQ</a> </li>
+
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+<div class="g-unit g-first" id="gc-toc">
+ <ul>
+ <li>
+ <h1><a href="index.html">Documentation</a></h1>
+ <ul>
+ <li> <strong>Introduction</strong>
+
+ <ul>
+ <li><a href="system_requirements.html">Device Requirements</a></li>
+ </ul>
+ </li>
+ <li> <strong>Dev Environment Setup</strong>
+ <ul>
+ <li><a href="build_system.html">Build System</a></li>
+ </ul>
+ </li>
+ <li> <strong>Basic Bring up</strong>
+
+ <ul>
+ <li><a href="build_new_device.html">Building New Device</a></li>
+ <li><a href="bring_up.html">Bring up</a></li>
+ <li><a href="keymaps_keyboard_input.html">Keymaps and Keyboard</a></li>
+ <li><a href="display_drivers.html">Display Drivers</a></li>
+ </ul>
+ </li>
+
+ <li> <strong>Multimedia</strong>
+ <ul>
+ <li><a href="audio_sub_system.html">Audio</a></li>
+ <li><a href="camera.html">Camera</a></li>
+ </ul>
+ </li>
+ <li> <strong>Power Management</strong>
+
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+ <li><a href="power_management.html">Power Management</a></li>
+ </ul>
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+
+ <li> <strong>Networking</strong>
+ <ul>
+ <li><a href="wifi.html">Wi-Fi</a></li>
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+ <li><a href="bluetooth.html">Bluetooth</a></li>
+ </ul>
+ </li>
+
+ <li> <strong>Telephony</strong>
+ <ul>
+ <li><a href="telephony.html">Radio Interface Layer</a></li>
+
+ </ul>
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+ <li> <strong>Testing</strong>
+ <ul>
+ <li><a href="instrumentation_testing.html">Instrumentation Testing</a></li>
+ </ul>
+
+ </li>
+ </ul>
+ </li>
+ </ul>
+</div>
+<a name="gc-pagecontent"></a>
+<div class="g-unit" id="gc-pagecontent">
+<div id="jd-content">
+<div class="jd-descr">
+
+
+<a name="androidCameraTitle"></a><h1>Camera Subsystem</h1>
+
+
+
+<a name="toc"/>
+<div style="padding:10px">
+<a href="#androidCameraIntroduction">Introduction</a><br/>
+<a href="#androidCameraBuildingDriver">Building a Camera Library</a><br/>
+<a href="#androidCameraSequenceDiagrams">Sequence Diagrams</a><br/><div style="padding-left:40px">
+
+<a href="#androidCameraSequenceDiagramsPreview">Preview</a><br/>
+<a href="#androidCameraSequenceDiagramsTakePic">Taking a Picture</a><br/></div>
+<a href="#androidCameraInterfaceIntro">Interface</a><br/></div></font></div>
+
+<a name="androidCameraIntroduction"></a><h2>Introduction</h2>
+
+<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>
+<p>The diagram below illustrates the structure of the camera subsystem.</p>
+<p><img src="androidCameraArchitecture.gif"></p>
+
+
+<a name="androidCameraBuildingDriver"></a><h2>Building a Camera Library</h2>
+
+<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>
+<p>The following stub <code>Android.mk</code> file ensures that <code>libcamera</code> compiles and links to the appropriate libraries:</p>
+<pre class="prettify">
+LOCAL_PATH := $(call my-dir)
+include $(CLEAR_VARS)
+
+LOCAL_MODULE := libcamera
+
+LOCAL_SHARED_LIBRARIES := \
+ libutils \
+ librpc \
+ liblog
+
+LOCAL_SRC_FILES += MyCameraHardware.cpp
+
+LOCAL_CFLAGS +=
+
+LOCAL_C_INCLUDES +=
+
+LOCAL_STATIC_LIBRARIES += \
+ libcamera-common \
+ libclock-rpc \
+ libcommondefs-rpc
+
+include $(BUILD_SHARED_LIBRARY)
+</pre>
+
+
+<a name="androidCameraSequenceDiagrams"></a><h2>Sequence Diagrams</h2>
+
+
+
+<a name="androidCameraSequenceDiagramsPreview"></a><h3>Preview</h3>
+
+<p>The following diagram illustrates the sequence of function calls and actions necessary for your camera to preview.</p>
+<img src="cameraPreview.jpg">
+
+
+<a name="androidCameraSequenceDiagramsTakePic"></a><h3>Taking a Picture</h3>
+
+<p>The following diagram illustrates the sequence of function calls and actions necessary for your camera to take a picture.</p>
+<img src="cameraTakePicture.jpg">
+
+
+<a name="androidCameraInterfaceIntro"></a><h2>Interface</h2>
+
+
+
+<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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