| <html devsite><head> |
| <title>创建和提交请求</title> |
| <meta name="project_path" value="/_project.yaml"/> |
| <meta name="book_path" value="/_book.yaml"/> |
| </head> |
| <body> |
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| Copyright 2017 The Android Open Source Project |
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| Licensed under the Apache License, Version 2.0 (the "License"); |
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| |
| <h2 id="default-settings">默认请求</h2> |
| <p>要构建默认捕获请求，请调用 <a href="/reference/hidl/android/hardware/camera/device/3.2/ICameraDeviceSession#constructdefaultrequestsettings">ICameraDeviceSession::constructDefaultRequestSettings()</a>。</p> |
| <h2 id="request-submission">提交请求</h2> |
| <p>要提交相机捕获请求，请调用 <a href="/reference/hidl/android/hardware/camera/device/3.2/ICameraDeviceSession#processcapturerequest">ICameraDeviceSession::processCaptureRequest()</a>。</p> |
| <h2 id="misc-methods">其他方法</h2> |
| <h3 id="request-result-message-queues">请求/结果消息队列</h3> |
| <p>相机捕获结果和请求 IPC 开销可通过<a href="/devices/architecture/hidl/fmq">快速消息队列</a>进一步优化。调用 <a href="/reference/hidl/android/hardware/camera/device/3.2/ICameraDeviceSession#getcapturerequestmetadataqueue">ICameraDeviceSession::getCaptureRequestMetadataQueue()</a> 和 <a href="/reference/hidl/android/hardware/camera/device/3.2/ICameraDeviceSession#getcaptureresultmetadataqueue">ICameraDeviceSession::getCaptureResultMetadataQueue()</a> 方法可查询相应的队列。</p> |
| <h3 id="flush">清空</h3> |
| <p>要清空所有待处理的捕获请求，请调用 <a href="/reference/hidl/android/hardware/camera/device/3.2/ICameraDeviceSession#flush">ICameraDeviceSession::flush()</a>。</p> |
| |
| </body></html> |
