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| <div class="navpath"><a class="el" href="namespaceandroid.html">android</a>::<a class="el" href="classandroid_1_1_camera_hardware_interface.html">CameraHardwareInterface</a> |
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| <h1>android::CameraHardwareInterface Class Reference</h1><!-- doxytag: class="android::CameraHardwareInterface" --><a class="el" href="_camera_hardware_interface_8h.html">CameraHardwareInterface.h</a> defines the interface to the camera hardware abstraction layer, used for setting and getting parameters, live previewing, and taking pictures. |
| <a href="#_details">More...</a> |
| <p> |
| <code>#include <<a class="el" href="_camera_hardware_interface_8h-source.html">CameraHardwareInterface.h</a>></code> |
| <p> |
| <table border="0" cellpadding="0" cellspacing="0"> |
| <tr><td></td></tr> |
| <tr><td colspan="2"><br><h2>Public Member Functions</h2></td></tr> |
| <tr><td class="memItemLeft" nowrap align="right" valign="top">virtual </td><td class="memItemRight" valign="bottom"><a class="el" href="classandroid_1_1_camera_hardware_interface.html#99f4ab74b58cd4b23e0fb00a46a60cb1">~CameraHardwareInterface</a> ()</td></tr> |
| |
| <tr><td class="memItemLeft" nowrap align="right" valign="top">virtual sp< IMemoryHeap > </td><td class="memItemRight" valign="bottom"><a class="el" href="classandroid_1_1_camera_hardware_interface.html#9d4071fb234a0c2e7bf6ea78e723f2f4">getPreviewHeap</a> () const =0</td></tr> |
| |
| <tr><td class="mdescLeft"> </td><td class="mdescRight">Return the IMemoryHeap for the preview image heap. <a href="#9d4071fb234a0c2e7bf6ea78e723f2f4"></a><br></td></tr> |
| <tr><td class="memItemLeft" nowrap align="right" valign="top">virtual status_t </td><td class="memItemRight" valign="bottom"><a class="el" href="classandroid_1_1_camera_hardware_interface.html#62def8031dee8bdab7933770708a6312">startPreview</a> (<a class="el" href="namespaceandroid.html#d32b08663d42356404e2eb971e271636">preview_callback</a> cb, void *user)=0</td></tr> |
| |
| <tr><td class="mdescLeft"> </td><td class="mdescRight">Start preview mode. <a href="#62def8031dee8bdab7933770708a6312"></a><br></td></tr> |
| <tr><td class="memItemLeft" nowrap align="right" valign="top">virtual void </td><td class="memItemRight" valign="bottom"><a class="el" href="classandroid_1_1_camera_hardware_interface.html#34faa77065f415b93cb1acf84fc788bf">stopPreview</a> ()=0</td></tr> |
| |
| <tr><td class="mdescLeft"> </td><td class="mdescRight">Stop a previously started preview. <a href="#34faa77065f415b93cb1acf84fc788bf"></a><br></td></tr> |
| <tr><td class="memItemLeft" nowrap align="right" valign="top">virtual status_t </td><td class="memItemRight" valign="bottom"><a class="el" href="classandroid_1_1_camera_hardware_interface.html#0dda73938e9b18326dd48bd721dbd515">autoFocus</a> (<a class="el" href="namespaceandroid.html#4dca8d8b824ca9a684358133da0ec8f2">autofocus_callback</a>, void *user)=0</td></tr> |
| |
| <tr><td class="mdescLeft"> </td><td class="mdescRight">Start auto focus, the callback routine is called once when focusing is complete. <a href="#0dda73938e9b18326dd48bd721dbd515"></a><br></td></tr> |
| <tr><td class="memItemLeft" nowrap align="right" valign="top">virtual status_t </td><td class="memItemRight" valign="bottom"><a class="el" href="classandroid_1_1_camera_hardware_interface.html#2aedf65cad695ce439029f37a7cb66c4">takePicture</a> (<a class="el" href="namespaceandroid.html#04c83209c2627e2d303320712ca9ee65">shutter_callback</a>, <a class="el" href="namespaceandroid.html#a97926709e452d66360cb9b24736969e">raw_callback</a>, <a class="el" href="namespaceandroid.html#c21980d4be1e0cc458399ecf5374d473">jpeg_callback</a>, void *user)=0</td></tr> |
| |
| <tr><td class="mdescLeft"> </td><td class="mdescRight">Take a picture. <a href="#2aedf65cad695ce439029f37a7cb66c4"></a><br></td></tr> |
| <tr><td class="memItemLeft" nowrap align="right" valign="top">virtual status_t </td><td class="memItemRight" valign="bottom"><a class="el" href="classandroid_1_1_camera_hardware_interface.html#da8faf376215a605357d26afa1b79386">cancelPicture</a> (bool cancel_shutter, bool cancel_raw, bool cancel_jpeg)=0</td></tr> |
| |
| <tr><td class="mdescLeft"> </td><td class="mdescRight">Cancel a picture that was started with takePicture. <a href="#da8faf376215a605357d26afa1b79386"></a><br></td></tr> |
| <tr><td class="memItemLeft" nowrap align="right" valign="top">virtual status_t </td><td class="memItemRight" valign="bottom"><a class="el" href="classandroid_1_1_camera_hardware_interface.html#82e54ede14bd263274bbc8777bafc384">setParameters</a> (const CameraParameters &params)=0</td></tr> |
| |
| <tr><td class="mdescLeft"> </td><td class="mdescRight">Set the camera parameters. <a href="#82e54ede14bd263274bbc8777bafc384"></a><br></td></tr> |
| <tr><td class="memItemLeft" nowrap align="right" valign="top">virtual CameraParameters </td><td class="memItemRight" valign="bottom"><a class="el" href="classandroid_1_1_camera_hardware_interface.html#4c748a3c0aa3c5f2333e0abcdbeb15cb">getParameters</a> () const =0</td></tr> |
| |
| <tr><td class="mdescLeft"> </td><td class="mdescRight">Return the camera parameters. <a href="#4c748a3c0aa3c5f2333e0abcdbeb15cb"></a><br></td></tr> |
| <tr><td class="memItemLeft" nowrap align="right" valign="top">virtual void </td><td class="memItemRight" valign="bottom"><a class="el" href="classandroid_1_1_camera_hardware_interface.html#df65310b8aa176e0ce5f08b87d6b7eb8">release</a> ()=0</td></tr> |
| |
| <tr><td class="mdescLeft"> </td><td class="mdescRight">Release the hardware resources owned by this object. <a href="#df65310b8aa176e0ce5f08b87d6b7eb8"></a><br></td></tr> |
| <tr><td class="memItemLeft" nowrap align="right" valign="top">virtual status_t </td><td class="memItemRight" valign="bottom"><a class="el" href="classandroid_1_1_camera_hardware_interface.html#06df1bf91b8af07964dca314a6031b32">dump</a> (int fd, const Vector< String16 > &args) const =0</td></tr> |
| |
| <tr><td class="mdescLeft"> </td><td class="mdescRight">Dump state of the camera hardware. <a href="#06df1bf91b8af07964dca314a6031b32"></a><br></td></tr> |
| </table> |
| <hr><a name="_details"></a><h2>Detailed Description</h2> |
| <a class="el" href="_camera_hardware_interface_8h.html">CameraHardwareInterface.h</a> defines the interface to the camera hardware abstraction layer, used for setting and getting parameters, live previewing, and taking pictures. |
| <p> |
| It is a referenced counted interface with RefBase as its base class. CameraService calls <a class="el" href="namespaceandroid.html#24c243f7f9ba0d1d881be17ae06254a2" title="factory function to instantiate a camera hardware object">openCameraHardware()</a> to retrieve a strong pointer to the instance of this interface and may be called multiple times. The following steps describe a typical sequence:<p> |
| <ol type=1> |
| <li>After CameraService calls <a class="el" href="namespaceandroid.html#24c243f7f9ba0d1d881be17ae06254a2" title="factory function to instantiate a camera hardware object">openCameraHardware()</a>, <a class="el" href="classandroid_1_1_camera_hardware_interface.html#4c748a3c0aa3c5f2333e0abcdbeb15cb" title="Return the camera parameters.">getParameters()</a> and <a class="el" href="classandroid_1_1_camera_hardware_interface.html#82e54ede14bd263274bbc8777bafc384" title="Set the camera parameters.">setParameters()</a> are used to initialize the camera instance. CameraService calls <a class="el" href="classandroid_1_1_camera_hardware_interface.html#9d4071fb234a0c2e7bf6ea78e723f2f4" title="Return the IMemoryHeap for the preview image heap.">getPreviewHeap()</a> to establish access to the preview heap so it can be registered with SurfaceFlinger for efficient display updating while in preview mode.</li><li><a class="el" href="classandroid_1_1_camera_hardware_interface.html#62def8031dee8bdab7933770708a6312" title="Start preview mode.">startPreview()</a> is called, which is passed a <a class="el" href="namespaceandroid.html#d32b08663d42356404e2eb971e271636" title="Callback for startPreview().">preview_callback()</a> function and a user parameter. The camera instance then periodically calls <a class="el" href="namespaceandroid.html#d32b08663d42356404e2eb971e271636" title="Callback for startPreview().">preview_callback()</a> each time a new preview frame is available. The callback routine has two parameters: the first is a pointer to the IMemory containing the frame and the second a user parameter. If the preview_callback code needs to use this memory after returning, it must copy the data.</li></ol> |
| <p> |
| Prior to taking a picture, CameraService calls autofocus() with <a class="el" href="namespaceandroid.html#4dca8d8b824ca9a684358133da0ec8f2" title="Callback for autoFocus().">autofocus_callback()</a> and a user parameter. When auto focusing has completed, the camera instance calls <a class="el" href="namespaceandroid.html#4dca8d8b824ca9a684358133da0ec8f2" title="Callback for autoFocus().">autofocus_callback()</a>, which informs the application whether focusing was successful. The camera instance only calls <a class="el" href="namespaceandroid.html#4dca8d8b824ca9a684358133da0ec8f2" title="Callback for autoFocus().">autofocus_callback()</a> once and it is up to the application to call <a class="el" href="classandroid_1_1_camera_hardware_interface.html#0dda73938e9b18326dd48bd721dbd515" title="Start auto focus, the callback routine is called once when focusing is complete.">autoFocus()</a> again if refocusing is desired.<p> |
| CameraService calls <a class="el" href="classandroid_1_1_camera_hardware_interface.html#2aedf65cad695ce439029f37a7cb66c4" title="Take a picture.">takePicture()</a> to request the camera instance take a picture. This method has two callbacks: <a class="el" href="namespaceandroid.html#a97926709e452d66360cb9b24736969e" title="Callback for takePicture().">raw_callback()</a> and <a class="el" href="namespaceandroid.html#c21980d4be1e0cc458399ecf5374d473" title="Callback for takePicture().">jpeg_callback()</a>. When the raw image is available, <a class="el" href="namespaceandroid.html#a97926709e452d66360cb9b24736969e" title="Callback for takePicture().">raw_callback()</a> is called with a pointer to the IMemory containing the raw image. When the jpeg image is available, <a class="el" href="namespaceandroid.html#c21980d4be1e0cc458399ecf5374d473" title="Callback for takePicture().">jpeg_callback()</a> is called with a pointer to the IMemory containing the jpeg image. As with <a class="el" href="namespaceandroid.html#d32b08663d42356404e2eb971e271636" title="Callback for startPreview().">preview_callback()</a>, the memory must be copied if it's needed after returning. |
| <p>Definition at line <a class="el" href="_camera_hardware_interface_8h-source.html#l00079">79</a> of file <a class="el" href="_camera_hardware_interface_8h-source.html">CameraHardwareInterface.h</a>.</p> |
| <hr><h2>Constructor & Destructor Documentation</h2> |
| <a class="anchor" name="99f4ab74b58cd4b23e0fb00a46a60cb1"></a><!-- doxytag: member="android::CameraHardwareInterface::~CameraHardwareInterface" ref="99f4ab74b58cd4b23e0fb00a46a60cb1" args="()" --> |
| <div class="memitem"> |
| <div class="memproto"> |
| <table class="memname"> |
| <tr> |
| <td class="memname">virtual android::CameraHardwareInterface::~CameraHardwareInterface </td> |
| <td>(</td> |
| <td class="paramname"> </td> |
| <td> ) </td> |
| <td><code> [inline, virtual]</code></td> |
| </tr> |
| </table> |
| </div> |
| <div class="memdoc"> |
| |
| <p> |
| |
| <p>Definition at line <a class="el" href="_camera_hardware_interface_8h-source.html#l00081">81</a> of file <a class="el" href="_camera_hardware_interface_8h-source.html">CameraHardwareInterface.h</a>.</p> |
| |
| </div> |
| </div><p> |
| <hr><h2>Member Function Documentation</h2> |
| <a class="anchor" name="9d4071fb234a0c2e7bf6ea78e723f2f4"></a><!-- doxytag: member="android::CameraHardwareInterface::getPreviewHeap" ref="9d4071fb234a0c2e7bf6ea78e723f2f4" args="() const =0" --> |
| <div class="memitem"> |
| <div class="memproto"> |
| <table class="memname"> |
| <tr> |
| <td class="memname">virtual sp<IMemoryHeap> android::CameraHardwareInterface::getPreviewHeap </td> |
| <td>(</td> |
| <td class="paramname"> </td> |
| <td> ) </td> |
| <td> const<code> [pure virtual]</code></td> |
| </tr> |
| </table> |
| </div> |
| <div class="memdoc"> |
| |
| <p> |
| Return the IMemoryHeap for the preview image heap. |
| <p> |
| |
| </div> |
| </div><p> |
| <a class="anchor" name="62def8031dee8bdab7933770708a6312"></a><!-- doxytag: member="android::CameraHardwareInterface::startPreview" ref="62def8031dee8bdab7933770708a6312" args="(preview_callback cb, void *user)=0" --> |
| <div class="memitem"> |
| <div class="memproto"> |
| <table class="memname"> |
| <tr> |
| <td class="memname">virtual status_t android::CameraHardwareInterface::startPreview </td> |
| <td>(</td> |
| <td class="paramtype"><a class="el" href="namespaceandroid.html#d32b08663d42356404e2eb971e271636">preview_callback</a> </td> |
| <td class="paramname"> <em>cb</em>, </td> |
| </tr> |
| <tr> |
| <td class="paramkey"></td> |
| <td></td> |
| <td class="paramtype">void * </td> |
| <td class="paramname"> <em>user</em></td><td> </td> |
| </tr> |
| <tr> |
| <td></td> |
| <td>)</td> |
| <td></td><td></td><td><code> [pure virtual]</code></td> |
| </tr> |
| </table> |
| </div> |
| <div class="memdoc"> |
| |
| <p> |
| Start preview mode. |
| <p> |
| When a preview image is available preview_callback is called with the user parameter. The call back parameter may be null. |
| </div> |
| </div><p> |
| <a class="anchor" name="34faa77065f415b93cb1acf84fc788bf"></a><!-- doxytag: member="android::CameraHardwareInterface::stopPreview" ref="34faa77065f415b93cb1acf84fc788bf" args="()=0" --> |
| <div class="memitem"> |
| <div class="memproto"> |
| <table class="memname"> |
| <tr> |
| <td class="memname">virtual void android::CameraHardwareInterface::stopPreview </td> |
| <td>(</td> |
| <td class="paramname"> </td> |
| <td> ) </td> |
| <td><code> [pure virtual]</code></td> |
| </tr> |
| </table> |
| </div> |
| <div class="memdoc"> |
| |
| <p> |
| Stop a previously started preview. |
| <p> |
| |
| </div> |
| </div><p> |
| <a class="anchor" name="0dda73938e9b18326dd48bd721dbd515"></a><!-- doxytag: member="android::CameraHardwareInterface::autoFocus" ref="0dda73938e9b18326dd48bd721dbd515" args="(autofocus_callback, void *user)=0" --> |
| <div class="memitem"> |
| <div class="memproto"> |
| <table class="memname"> |
| <tr> |
| <td class="memname">virtual status_t android::CameraHardwareInterface::autoFocus </td> |
| <td>(</td> |
| <td class="paramtype"><a class="el" href="namespaceandroid.html#4dca8d8b824ca9a684358133da0ec8f2">autofocus_callback</a> </td> |
| <td class="paramname">, </td> |
| </tr> |
| <tr> |
| <td class="paramkey"></td> |
| <td></td> |
| <td class="paramtype">void * </td> |
| <td class="paramname"> <em>user</em></td><td> </td> |
| </tr> |
| <tr> |
| <td></td> |
| <td>)</td> |
| <td></td><td></td><td><code> [pure virtual]</code></td> |
| </tr> |
| </table> |
| </div> |
| <div class="memdoc"> |
| |
| <p> |
| Start auto focus, the callback routine is called once when focusing is complete. |
| <p> |
| <a class="el" href="classandroid_1_1_camera_hardware_interface.html#0dda73938e9b18326dd48bd721dbd515" title="Start auto focus, the callback routine is called once when focusing is complete.">autoFocus()</a> will be called again if another auto focus is needed. |
| </div> |
| </div><p> |
| <a class="anchor" name="2aedf65cad695ce439029f37a7cb66c4"></a><!-- doxytag: member="android::CameraHardwareInterface::takePicture" ref="2aedf65cad695ce439029f37a7cb66c4" args="(shutter_callback, raw_callback, jpeg_callback, void *user)=0" --> |
| <div class="memitem"> |
| <div class="memproto"> |
| <table class="memname"> |
| <tr> |
| <td class="memname">virtual status_t android::CameraHardwareInterface::takePicture </td> |
| <td>(</td> |
| <td class="paramtype"><a class="el" href="namespaceandroid.html#04c83209c2627e2d303320712ca9ee65">shutter_callback</a> </td> |
| <td class="paramname">, </td> |
| </tr> |
| <tr> |
| <td class="paramkey"></td> |
| <td></td> |
| <td class="paramtype"><a class="el" href="namespaceandroid.html#a97926709e452d66360cb9b24736969e">raw_callback</a> </td> |
| <td class="paramname">, </td> |
| </tr> |
| <tr> |
| <td class="paramkey"></td> |
| <td></td> |
| <td class="paramtype"><a class="el" href="namespaceandroid.html#c21980d4be1e0cc458399ecf5374d473">jpeg_callback</a> </td> |
| <td class="paramname">, </td> |
| </tr> |
| <tr> |
| <td class="paramkey"></td> |
| <td></td> |
| <td class="paramtype">void * </td> |
| <td class="paramname"> <em>user</em></td><td> </td> |
| </tr> |
| <tr> |
| <td></td> |
| <td>)</td> |
| <td></td><td></td><td><code> [pure virtual]</code></td> |
| </tr> |
| </table> |
| </div> |
| <div class="memdoc"> |
| |
| <p> |
| Take a picture. |
| <p> |
| The raw_callback is called when the uncompressed image is available. The jpeg_callback is called when the compressed image is available. These call backs may be null. The user parameter is passed to each of the call back routines. |
| </div> |
| </div><p> |
| <a class="anchor" name="da8faf376215a605357d26afa1b79386"></a><!-- doxytag: member="android::CameraHardwareInterface::cancelPicture" ref="da8faf376215a605357d26afa1b79386" args="(bool cancel_shutter, bool cancel_raw, bool cancel_jpeg)=0" --> |
| <div class="memitem"> |
| <div class="memproto"> |
| <table class="memname"> |
| <tr> |
| <td class="memname">virtual status_t android::CameraHardwareInterface::cancelPicture </td> |
| <td>(</td> |
| <td class="paramtype">bool </td> |
| <td class="paramname"> <em>cancel_shutter</em>, </td> |
| </tr> |
| <tr> |
| <td class="paramkey"></td> |
| <td></td> |
| <td class="paramtype">bool </td> |
| <td class="paramname"> <em>cancel_raw</em>, </td> |
| </tr> |
| <tr> |
| <td class="paramkey"></td> |
| <td></td> |
| <td class="paramtype">bool </td> |
| <td class="paramname"> <em>cancel_jpeg</em></td><td> </td> |
| </tr> |
| <tr> |
| <td></td> |
| <td>)</td> |
| <td></td><td></td><td><code> [pure virtual]</code></td> |
| </tr> |
| </table> |
| </div> |
| <div class="memdoc"> |
| |
| <p> |
| Cancel a picture that was started with takePicture. |
| <p> |
| You may cancel any of the shutter, raw, or jpeg callbacks. Calling this method when no picture is being taken is a no-op. |
| </div> |
| </div><p> |
| <a class="anchor" name="82e54ede14bd263274bbc8777bafc384"></a><!-- doxytag: member="android::CameraHardwareInterface::setParameters" ref="82e54ede14bd263274bbc8777bafc384" args="(const CameraParameters &params)=0" --> |
| <div class="memitem"> |
| <div class="memproto"> |
| <table class="memname"> |
| <tr> |
| <td class="memname">virtual status_t android::CameraHardwareInterface::setParameters </td> |
| <td>(</td> |
| <td class="paramtype">const CameraParameters & </td> |
| <td class="paramname"> <em>params</em> </td> |
| <td> ) </td> |
| <td><code> [pure virtual]</code></td> |
| </tr> |
| </table> |
| </div> |
| <div class="memdoc"> |
| |
| <p> |
| Set the camera parameters. |
| <p> |
| |
| </div> |
| </div><p> |
| <a class="anchor" name="4c748a3c0aa3c5f2333e0abcdbeb15cb"></a><!-- doxytag: member="android::CameraHardwareInterface::getParameters" ref="4c748a3c0aa3c5f2333e0abcdbeb15cb" args="() const =0" --> |
| <div class="memitem"> |
| <div class="memproto"> |
| <table class="memname"> |
| <tr> |
| <td class="memname">virtual CameraParameters android::CameraHardwareInterface::getParameters </td> |
| <td>(</td> |
| <td class="paramname"> </td> |
| <td> ) </td> |
| <td> const<code> [pure virtual]</code></td> |
| </tr> |
| </table> |
| </div> |
| <div class="memdoc"> |
| |
| <p> |
| Return the camera parameters. |
| <p> |
| |
| </div> |
| </div><p> |
| <a class="anchor" name="df65310b8aa176e0ce5f08b87d6b7eb8"></a><!-- doxytag: member="android::CameraHardwareInterface::release" ref="df65310b8aa176e0ce5f08b87d6b7eb8" args="()=0" --> |
| <div class="memitem"> |
| <div class="memproto"> |
| <table class="memname"> |
| <tr> |
| <td class="memname">virtual void android::CameraHardwareInterface::release </td> |
| <td>(</td> |
| <td class="paramname"> </td> |
| <td> ) </td> |
| <td><code> [pure virtual]</code></td> |
| </tr> |
| </table> |
| </div> |
| <div class="memdoc"> |
| |
| <p> |
| Release the hardware resources owned by this object. |
| <p> |
| Note that this is *not* done in the destructor. |
| </div> |
| </div><p> |
| <a class="anchor" name="06df1bf91b8af07964dca314a6031b32"></a><!-- doxytag: member="android::CameraHardwareInterface::dump" ref="06df1bf91b8af07964dca314a6031b32" args="(int fd, const Vector< String16 > &args) const =0" --> |
| <div class="memitem"> |
| <div class="memproto"> |
| <table class="memname"> |
| <tr> |
| <td class="memname">virtual status_t android::CameraHardwareInterface::dump </td> |
| <td>(</td> |
| <td class="paramtype">int </td> |
| <td class="paramname"> <em>fd</em>, </td> |
| </tr> |
| <tr> |
| <td class="paramkey"></td> |
| <td></td> |
| <td class="paramtype">const Vector< String16 > & </td> |
| <td class="paramname"> <em>args</em></td><td> </td> |
| </tr> |
| <tr> |
| <td></td> |
| <td>)</td> |
| <td></td><td></td><td> const<code> [pure virtual]</code></td> |
| </tr> |
| </table> |
| </div> |
| <div class="memdoc"> |
| |
| <p> |
| Dump state of the camera hardware. |
| <p> |
| |
| </div> |
| </div><p> |
| <hr>The documentation for this class was generated from the following file:<ul> |
| <li><a class="el" href="_camera_hardware_interface_8h-source.html">CameraHardwareInterface.h</a></ul> |
| </div> |
| </body> |
| </html> |
