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<html devsite>
<head>
<title>Request creation and submission</title>
<meta name="project_path" value="/_project.yaml" />
<meta name="book_path" value="/_book.yaml" />
</head>
<body>
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You may obtain a copy of the License at
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<h2 id="default-settings">Default requests</h2>
<p>To construct default capture requests, call
<a href="/reference/hidl/android/hardware/camera/device/3.2/ICameraDeviceSession#constructdefaultrequestsettings">ICameraDeviceSession::constructDefaultRequestSettings()</a>.</p>
<h2 id="request-submission">Request submission</h2>
<p>To submit camera capture requests, call
<a href="/reference/hidl/android/hardware/camera/device/3.2/ICameraDeviceSession#processcapturerequest">ICameraDeviceSession::processCaptureRequest()</a>.</p>
<h2 id="misc-methods">Miscellaneous methods</h2>
<h3 id="request-result-message-queues">Request/result message queues</h3>
<p>Camera capture result and request IPC overhead can be further optimized via
<a href="/devices/architecture/hidl/fmq">fast message queues</a>. Call the
<a href="/reference/hidl/android/hardware/camera/device/3.2/ICameraDeviceSession#getcapturerequestmetadataqueue">ICameraDeviceSession::getCaptureRequestMetadataQueue()</a>
and
<a href="/reference/hidl/android/hardware/camera/device/3.2/ICameraDeviceSession#getcaptureresultmetadataqueue">ICameraDeviceSession::getCaptureResultMetadataQueue()</a>
methods to query the corresponding queues.</p>
<h3 id="flush">flush</h3>
<p>To flush any pending capture requests, call
<a href="/reference/hidl/android/hardware/camera/device/3.2/ICameraDeviceSession#flush">ICameraDeviceSession::flush()</a>.</p>
</body>
</html>
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