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</span>
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</button>
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<button id="wh_close_topic_toc_button" class="close-toc-button d-none" aria-label="Toggle topic table of content" aria-controls="wh_topic_toc" aria-expanded="true">
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<span class="close-toc-icon-container">
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<span class="close-toc-icon"></span>
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<div class=" wh_topic_content body "><main role="main"><article class="- topic/topic topic" role="article" aria-labelledby="ariaid-title1">
|
||
<span class="edit-link" style="font-size:12px; opacity:0.6; text-align:right; vertical-align:middle"><a target="_blank" href="http://aicdocco/taskstopics/sdk/ve/ve_design_guide_lite.dita">Edit online</a></span><h1 class="- topic/title title topictitle1" id="ariaid-title1">设计说明</h1>
|
||
<div class="date inPage">16 May 2025</div><div style="color: gray;">
|
||
Read time: 4 minute(s)
|
||
</div>
|
||
<div class="- topic/body body">
|
||
<div class="- topic/div div section" id="id__id2">
|
||
<strong class="+ topic/ph hi-d/b ph b">源码说明</strong>
|
||
<p class="- topic/p p" data-ofbid="d93181e33__20250519091514">源代码位于 <code class="+ topic/ph pr-d/codeph ph codeph">bsp/artinchip/</code>： </p><ul class="- topic/ul ul simple" id="id__ul_dxh_l4f_fdc" data-ofbid="id__ul_dxh_l4f_fdc">
|
||
<li class="- topic/li li" data-ofbid="d93181e40__20250519091514">
|
||
<p class="- topic/p p" data-ofbid="d93181e42__20250519091514"><span class="+ topic/ph sw-d/filepath ph filepath">bsp/artinchip/drv/ve/aic_drv_ve.c</span>， VE Driver 层实现</p>
|
||
</li>
|
||
<li class="- topic/li li" data-ofbid="d93181e48__20250519091514">
|
||
<p class="- topic/p p" data-ofbid="d93181e50__20250519091514"><span class="+ topic/ph sw-d/filepath ph filepath">bsp/artinchip/hal/ve/aic_hal_ve.c</span>， VE HAL 层实现</p>
|
||
</li>
|
||
<li class="- topic/li li" data-ofbid="d93181e56__20250519091514">
|
||
<p class="- topic/p p" data-ofbid="d93181e58__20250519091514"><span class="+ topic/ph sw-d/filepath ph filepath">bsp/artinchip/include/drv/aic_drv_ve.h</span>，VE Drv 层接口头文件</p>
|
||
</li>
|
||
<li class="- topic/li li" data-ofbid="d93181e64__20250519091514">
|
||
<p class="- topic/p p" data-ofbid="d93181e66__20250519091514"><span class="+ topic/ph sw-d/filepath ph filepath">bsp/artinchip/include/hal/aic_hal_ve.h</span>， VE HAL
|
||
层接口头文件</p>
|
||
</li>
|
||
</ul></div>
|
||
<section class="- topic/section section" id="id__section_xfj_m4f_fdc" data-ofbid="id__section_xfj_m4f_fdc"><h2 class="- topic/title title sectiontitle">模块架构</h2>
|
||
|
||
<div class="- topic/div div section">
|
||
<ul class="- topic/ul ul simple" id="id__ul_exh_l4f_fdc" data-ofbid="id__ul_exh_l4f_fdc">
|
||
<li class="- topic/li li" data-ofbid="d93181e82__20250519091514">
|
||
<p class="- topic/p p" data-ofbid="d93181e84__20250519091514">VE HAL ：负责 VE 硬件资源初始化和获取等</p>
|
||
</li>
|
||
<li class="- topic/li li" data-ofbid="d93181e88__20250519091514">
|
||
<p class="- topic/p p" data-ofbid="d93181e90__20250519091514">VE DRV ：对 HAL 层的封装，向上提供更简洁的接口</p>
|
||
</li>
|
||
<li class="- topic/li li" data-ofbid="d93181e94__20250519091514">
|
||
<p class="- topic/p p" data-ofbid="d93181e96__20250519091514">MPP ：直接掉用 HAL 层接口，处理编解码逻辑，寄存器配置等</p>
|
||
</li>
|
||
<li class="- topic/li li" data-ofbid="d93181e100__20250519091514">
|
||
<p class="- topic/p p" data-ofbid="d93181e102__20250519091514">APP ：应用层调用 MPP 层接口，即可实现对 VE 的操作</p>
|
||
</li>
|
||
</ul>
|
||
<figure class="- topic/fig fig fignone" id="id__id10" data-ofbid="id__id10">
|
||
|
||
<br/><div class="imagecenter"><img class="- topic/image image imagecenter" id="id__image_fxh_l4f_fdc" src="../../../images/ve/ve_framework_lite.png" alt="ve_framework"/></div><br/>
|
||
<figcaption data-caption-side="bottom" class="- topic/title title figcapcenter"><span class="figtitleprefix fig--title-label">图<span class="fig--title-label-number"> 1</span><span class="fig--title-label-punctuation">. </span></span><span class="fig--title">VE 驱动框架</span></figcaption></figure>
|
||
<dl class="- topic/dl dl simple" id="id__dl_gxh_l4f_fdc" data-ofbid="id__dl_gxh_l4f_fdc">
|
||
|
||
<dt class="- topic/dt dt dlterm" data-ofbid="d93181e123__20250519091514"> 操作 VE 基本流程如下：</dt>
|
||
<dd class="- topic/dd dd">
|
||
<ol class="- topic/ol ol arabic simple" id="id__ol_hxh_l4f_fdc" data-ofbid="id__ol_hxh_l4f_fdc">
|
||
<li class="- topic/li li" data-ofbid="d93181e130__20250519091514">
|
||
<p class="- topic/p p" data-ofbid="d93181e132__20250519091514">调用 drv_ve_open 打开 VE 驱动；</p>
|
||
</li>
|
||
<li class="- topic/li li" data-ofbid="d93181e136__20250519091514">
|
||
<p class="- topic/p p" data-ofbid="d93181e138__20250519091514">调用 drv_ve_control(IOC_VE_GET_CLIENT) 获取 ve 硬件设备独占权限；</p>
|
||
</li>
|
||
<li class="- topic/li li" data-ofbid="d93181e142__20250519091514">
|
||
<p class="- topic/p p" data-ofbid="d93181e144__20250519091514">程序完成一次独立的编解码任务：配置寄存器、等待 VE 当前任务完成；</p>
|
||
</li>
|
||
<li class="- topic/li li" data-ofbid="d93181e148__20250519091514">
|
||
<p class="- topic/p p" data-ofbid="d93181e150__20250519091514">调用 drv_ve_control(IOC_VE_PUT_CLIENT) 释放 ve 硬件设备独占权限；</p>
|
||
</li>
|
||
<li class="- topic/li li" data-ofbid="d93181e154__20250519091514">
|
||
<p class="- topic/p p" data-ofbid="d93181e156__20250519091514">视频帧解码完成，调用 drv_ve_close 关闭 VE 驱动。</p>
|
||
</li>
|
||
</ol>
|
||
</dd>
|
||
|
||
</dl>
|
||
</div>
|
||
</section>
|
||
<section class="- topic/section section" id="id__section_nkt_44f_fdc" data-ofbid="id__section_nkt_44f_fdc"><h2 class="- topic/title title sectiontitle">关键流程设计</h2>
|
||
|
||
<div class="- topic/div div section" id="id__id5">
|
||
<strong class="+ topic/ph hi-d/b ph b">中断处理流程</strong>
|
||
<ol class="- topic/ol ol" id="id__ol_v5z_r4f_fdc" data-ofbid="id__ol_v5z_r4f_fdc">
|
||
<li class="- topic/li li" data-ofbid="d93181e178__20250519091514">
|
||
<div class="- topic/p p" data-ofbid="d93181e180__20250519091514">VE 中断类型有三种，包括：finish 中断、error 中断、bit request 中断。<ul class="- topic/ul ul simple" id="id__ul_ixh_l4f_fdc" data-ofbid="id__ul_ixh_l4f_fdc">
|
||
<li class="- topic/li li" data-ofbid="d93181e184__20250519091514">
|
||
<p class="- topic/p p" data-ofbid="d93181e186__20250519091514">finish 中断表示 VE 任务正常结束</p>
|
||
</li>
|
||
<li class="- topic/li li" data-ofbid="d93181e190__20250519091514">
|
||
<p class="- topic/p p" data-ofbid="d93181e192__20250519091514">error 中断表示 VE 处理任务过程中出错</p>
|
||
</li>
|
||
<li class="- topic/li li" data-ofbid="d93181e196__20250519091514">
|
||
<p class="- topic/p p" data-ofbid="d93181e198__20250519091514">bit request 中断表示当前数据不足以完成一次完整的任务，需要继续发送数据</p>
|
||
</li>
|
||
</ul></div>
|
||
</li>
|
||
<li class="- topic/li li" data-ofbid="d93181e204__20250519091514">
|
||
<div class="- topic/p p" data-ofbid="d93181e206__20250519091514">上层程序对 VE 中断的处理<ul class="- topic/ul ul simple" id="id__ul_jxh_l4f_fdc" data-ofbid="id__ul_jxh_l4f_fdc">
|
||
<li class="- topic/li li" data-ofbid="d93181e210__20250519091514">
|
||
<p class="- topic/p p" data-ofbid="d93181e212__20250519091514">finish 中断处理：VE 正常结束，释放 VE 硬件设备独占权限</p>
|
||
</li>
|
||
<li class="- topic/li li" data-ofbid="d93181e216__20250519091514">
|
||
<p class="- topic/p p" data-ofbid="d93181e218__20250519091514">bit request 中断处理：再次发送一笔数据，重新启动 VE 执行任务，重复以上过程，直到 VE 返回 finish
|
||
或 error 中断</p>
|
||
</li>
|
||
<li class="- topic/li li" data-ofbid="d93181e222__20250519091514">
|
||
<p class="- topic/p p" data-ofbid="d93181e224__20250519091514">error 中断：VE 执行出错，必须对 VE 进行硬件复位避免错误影响下次任务</p>
|
||
</li>
|
||
<li class="- topic/li li" data-ofbid="d93181e228__20250519091514">
|
||
<p class="- topic/p p" data-ofbid="d93181e230__20250519091514">等中断超时：此时 VE 出现未知异常，必须对 VE 进行硬件复位</p>
|
||
</li>
|
||
</ul><div class="- topic/note note note note_note" id="id__note_cmq_qn3_ddc" data-ofbid="id__note_cmq_qn3_ddc"><span class="note__title">注：</span>
|
||
<p class="- topic/p p" data-ofbid="d93181e236__20250519091514">处理 bit request 中断时，不能释放 VE
|
||
硬件设备独占权限，因为两次任务处理有相关性。如果这两次任务之间执行其它任务，会影响 VE
|
||
内部状态，从而导致该次任务执行出错。</p>
|
||
</div></div>
|
||
</li>
|
||
</ol></div>
|
||
<div class="- topic/div div section" id="id__id6">
|
||
<strong class="+ topic/ph hi-d/b ph b">多线程支持</strong>
|
||
<ul class="- topic/ul ul simple" id="id__ul_kxh_l4f_fdc" data-ofbid="id__ul_kxh_l4f_fdc">
|
||
<li class="- topic/li li" data-ofbid="d93181e249__20250519091514">
|
||
<p class="- topic/p p" data-ofbid="d93181e251__20250519091514">VE 设备只有一个，所以同一时间只能执行一个任务。当多个线程同时操作 VE 驱动时，VE 只能分时复用。因此上层程序在操作 VE 之前，必须获得
|
||
VE 的独占权限。</p>
|
||
</li>
|
||
<li class="- topic/li li" data-ofbid="d93181e255__20250519091514">
|
||
<p class="- topic/p p" data-ofbid="d93181e257__20250519091514">VE 驱动通过 IOC_VE_GET_CLIENT/IOC_VE_PUT_CLIENT 这两个 drv_ve_control
|
||
接口为上层程序提供获取和释放 VE 独占权限功能。</p>
|
||
</li>
|
||
<li class="- topic/li li" data-ofbid="d93181e261__20250519091514">
|
||
<p class="- topic/p p" data-ofbid="d93181e263__20250519091514">为避免每个线程都执行 VE 驱动初始化等重复操作，建议用户态程序使用单例模式实现 VE 驱动调用。具体实现可参考 mpp
|
||
代码（packages/artinchip/mpp/ve/common/ve.c）。</p>
|
||
</li>
|
||
</ul></div>
|
||
</section>
|
||
<section class="- topic/section section" id="id__section_lyv_t4f_fdc" data-ofbid="id__section_lyv_t4f_fdc"><h2 class="- topic/title title sectiontitle">数据结构设计</h2>
|
||
|
||
<div class="- topic/div div section" id="id__id7">
|
||
<div class="- topic/div div section" id="id__id8">
|
||
<strong class="+ topic/ph hi-d/b ph b"></strong>
|
||
<pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="id__codeblock_lxh_l4f_fdc" data-ofbid="id__codeblock_lxh_l4f_fdc"><em class="hl-comment">// 中断信息结构体</em>
|
||
<strong class="hl-keyword">struct</strong> wait_info {
|
||
<strong class="hl-keyword">int</strong> wait_time;
|
||
<strong class="hl-keyword">unsigned</strong> <strong class="hl-keyword">int</strong> reg_status;
|
||
};
|
||
<em class="hl-comment">//VE 硬件抽象</em>
|
||
<strong class="hl-keyword">struct</strong> aic_ve_client {
|
||
u32 status;
|
||
aicos_event_t wait_event;
|
||
aicos_mutex_t lock;
|
||
};</pre>
|
||
</div>
|
||
</div>
|
||
</section>
|
||
<section class="- topic/section section" id="id__section_tm3_v4f_fdc" data-ofbid="id__section_tm3_v4f_fdc"><h2 class="- topic/title title sectiontitle">接口设计</h2>
|
||
|
||
<div class="table-container"><table class="- topic/table table frame-all" id="id__table_mxh_l4f_fdc" data-ofbid="id__table_mxh_l4f_fdc" data-cols="2"><caption class="- topic/title title tablecap" data-caption-side="top" data-is-repeated="true"><span class="table--title-label">表<span class="table--title-label-number"> 1</span><span class="table--title-label-punctuation">. </span></span><span class="table--title">drv_ve_open</span></caption><colgroup><col style="width:16.666666666666664%"/><col style="width:83.33333333333334%"/></colgroup><thead class="- topic/thead thead">
|
||
<tr class="- topic/row">
|
||
<th class="- topic/entry entry colsep-1 rowsep-1" id="id__table_mxh_l4f_fdc__entry__1"><p class="- topic/p p" data-ofbid="d93181e307__20250519091514">函数原型</p></th>
|
||
<th class="- topic/entry entry colsep-0 rowsep-1" id="id__table_mxh_l4f_fdc__entry__2"><p class="- topic/p p" data-ofbid="d93181e311__20250519091514">struct aic_ve_client *drv_ve_open(void)</p></th>
|
||
</tr>
|
||
</thead><tbody class="- topic/tbody tbody">
|
||
<tr class="- topic/row">
|
||
<td class="- topic/entry entry colsep-1 rowsep-1" headers="id__table_mxh_l4f_fdc__entry__1"><p class="- topic/p p" data-ofbid="d93181e321__20250519091514">功能说明</p></td>
|
||
<td class="- topic/entry entry colsep-0 rowsep-1" headers="id__table_mxh_l4f_fdc__entry__2"><p class="- topic/p p" data-ofbid="d93181e325__20250519091514">打开 VE 设备</p></td>
|
||
</tr>
|
||
<tr class="- topic/row">
|
||
<td class="- topic/entry entry colsep-1 rowsep-1" headers="id__table_mxh_l4f_fdc__entry__1"><p class="- topic/p p" data-ofbid="d93181e332__20250519091514">参数定义</p></td>
|
||
<td class="- topic/entry entry colsep-0 rowsep-1" headers="id__table_mxh_l4f_fdc__entry__2"><p class="- topic/p p" data-ofbid="d93181e336__20250519091514">无</p></td>
|
||
</tr>
|
||
<tr class="- topic/row">
|
||
<td class="- topic/entry entry colsep-1 rowsep-1" headers="id__table_mxh_l4f_fdc__entry__1"><p class="- topic/p p" data-ofbid="d93181e343__20250519091514">返回值</p></td>
|
||
<td class="- topic/entry entry colsep-0 rowsep-1" headers="id__table_mxh_l4f_fdc__entry__2"><p class="- topic/p p" data-ofbid="d93181e347__20250519091514">
|
||
<div class="- topic/div div">
|
||
<div class="- topic/div div">VE 设备</div>
|
||
</div>
|
||
</p></td>
|
||
</tr>
|
||
<tr class="- topic/row">
|
||
<td class="- topic/entry entry colsep-1 rowsep-0" headers="id__table_mxh_l4f_fdc__entry__1"><p class="- topic/p p" data-ofbid="d93181e360__20250519091514">注意事项</p></td>
|
||
<td class="- topic/entry entry colsep-0 rowsep-0" headers="id__table_mxh_l4f_fdc__entry__2"><p class="- topic/p p" data-ofbid="d93181e364__20250519091514">- </p></td>
|
||
</tr>
|
||
</tbody></table></div>
|
||
<div class="table-container"><table class="- topic/table table frame-all" id="id__table_nxh_l4f_fdc" data-ofbid="id__table_nxh_l4f_fdc" data-cols="2"><caption class="- topic/title title tablecap" data-caption-side="top" data-is-repeated="true"><span class="table--title-label">表<span class="table--title-label-number"> 2</span><span class="table--title-label-punctuation">. </span></span><span class="table--title">drv_ve_close</span></caption><colgroup><col style="width:16.666666666666664%"/><col style="width:83.33333333333334%"/></colgroup><thead class="- topic/thead thead">
|
||
<tr class="- topic/row">
|
||
<th class="- topic/entry entry colsep-1 rowsep-1" id="id__table_nxh_l4f_fdc__entry__1"><p class="- topic/p p" data-ofbid="d93181e387__20250519091514">函数原型</p></th>
|
||
<th class="- topic/entry entry colsep-0 rowsep-1" id="id__table_nxh_l4f_fdc__entry__2"><p class="- topic/p p" data-ofbid="d93181e391__20250519091514">int drv_ve_close(struct aic_ve_client *client)</p></th>
|
||
</tr>
|
||
</thead><tbody class="- topic/tbody tbody">
|
||
<tr class="- topic/row">
|
||
<td class="- topic/entry entry colsep-1 rowsep-1" headers="id__table_nxh_l4f_fdc__entry__1"><p class="- topic/p p" data-ofbid="d93181e401__20250519091514">功能说明</p></td>
|
||
<td class="- topic/entry entry colsep-0 rowsep-1" headers="id__table_nxh_l4f_fdc__entry__2"><p class="- topic/p p" data-ofbid="d93181e405__20250519091514">关闭 VE 设备</p></td>
|
||
</tr>
|
||
<tr class="- topic/row">
|
||
<td class="- topic/entry entry colsep-1 rowsep-1" headers="id__table_nxh_l4f_fdc__entry__1"><p class="- topic/p p" data-ofbid="d93181e412__20250519091514">参数定义</p></td>
|
||
<td class="- topic/entry entry colsep-0 rowsep-1" headers="id__table_nxh_l4f_fdc__entry__2"><p class="- topic/p p" data-ofbid="d93181e416__20250519091514">
|
||
<div class="- topic/div div">
|
||
<div class="- topic/div div">client：VE 设备</div>
|
||
</div>
|
||
</p></td>
|
||
</tr>
|
||
<tr class="- topic/row">
|
||
<td class="- topic/entry entry colsep-1 rowsep-1" headers="id__table_nxh_l4f_fdc__entry__1"><p class="- topic/p p" data-ofbid="d93181e429__20250519091514">返回值</p></td>
|
||
<td class="- topic/entry entry colsep-0 rowsep-1" headers="id__table_nxh_l4f_fdc__entry__2"><p class="- topic/p p" data-ofbid="d93181e433__20250519091514">
|
||
<div class="- topic/div div">
|
||
<div class="- topic/div div"> 0：成功，其它：失败</div>
|
||
</div>
|
||
</p></td>
|
||
</tr>
|
||
<tr class="- topic/row">
|
||
<td class="- topic/entry entry colsep-1 rowsep-0" headers="id__table_nxh_l4f_fdc__entry__1"><p class="- topic/p p" data-ofbid="d93181e446__20250519091514">注意事项</p></td>
|
||
<td class="- topic/entry entry colsep-0 rowsep-0" headers="id__table_nxh_l4f_fdc__entry__2"><p class="- topic/p p" data-ofbid="d93181e450__20250519091514">-</p></td>
|
||
</tr>
|
||
</tbody></table></div>
|
||
<div class="- topic/div div section" id="id__ioc-ve-get-client">
|
||
<strong class="+ topic/ph hi-d/b ph b"></strong>
|
||
<div class="table-container"><table class="- topic/table table frame-all" id="id__table_oxh_l4f_fdc" data-ofbid="id__table_oxh_l4f_fdc" data-cols="2"><caption class="- topic/title title tablecap" data-caption-side="top" data-is-repeated="true"><span class="table--title-label">表<span class="table--title-label-number"> 3</span><span class="table--title-label-punctuation">. </span></span><span class="table--title">IOC_VE_GET_CLIENT</span></caption><colgroup><col style="width:16.666666666666664%"/><col style="width:83.33333333333334%"/></colgroup><thead class="- topic/thead thead">
|
||
<tr class="- topic/row">
|
||
<th class="- topic/entry entry colsep-1 rowsep-1" id="id__table_oxh_l4f_fdc__entry__1"><p class="- topic/p p" data-ofbid="d93181e477__20250519091514">函数原型</p></th>
|
||
<th class="- topic/entry entry colsep-0 rowsep-1" id="id__table_oxh_l4f_fdc__entry__2"><p class="- topic/p p" data-ofbid="d93181e481__20250519091514">int drv_ve_control(struct aic_ve_client *client, int cmd,
|
||
void *arg)</p></th>
|
||
</tr>
|
||
</thead><tbody class="- topic/tbody tbody">
|
||
<tr class="- topic/row">
|
||
<td class="- topic/entry entry colsep-1 rowsep-1" headers="id__table_oxh_l4f_fdc__entry__1"><p class="- topic/p p" data-ofbid="d93181e491__20250519091514">功能说明</p></td>
|
||
<td class="- topic/entry entry colsep-0 rowsep-1" headers="id__table_oxh_l4f_fdc__entry__2"><p class="- topic/p p" data-ofbid="d93181e495__20250519091514">获取 VE 设备独占权限</p></td>
|
||
</tr>
|
||
<tr class="- topic/row">
|
||
<td class="- topic/entry entry colsep-1 rowsep-1" headers="id__table_oxh_l4f_fdc__entry__1"><p class="- topic/p p" data-ofbid="d93181e502__20250519091514">参数定义</p></td>
|
||
<td class="- topic/entry entry colsep-0 rowsep-1" headers="id__table_oxh_l4f_fdc__entry__2"><p class="- topic/p p" data-ofbid="d93181e506__20250519091514">
|
||
<div class="- topic/div div">
|
||
<div class="- topic/div div">client：VE 设备</div>
|
||
<div class="- topic/div div">cmd ：IOC_VE_GET_CLIENT</div>
|
||
<div class="- topic/div div">arg：NULL</div>
|
||
</div>
|
||
</p></td>
|
||
</tr>
|
||
<tr class="- topic/row">
|
||
<td class="- topic/entry entry colsep-1 rowsep-1" headers="id__table_oxh_l4f_fdc__entry__1"><p class="- topic/p p" data-ofbid="d93181e525__20250519091514">返回值</p></td>
|
||
<td class="- topic/entry entry colsep-0 rowsep-1" headers="id__table_oxh_l4f_fdc__entry__2"><p class="- topic/p p" data-ofbid="d93181e529__20250519091514">
|
||
<div class="- topic/div div">
|
||
<div class="- topic/div div"> 0：成功，其它：失败</div>
|
||
</div>
|
||
</p></td>
|
||
</tr>
|
||
<tr class="- topic/row">
|
||
<td class="- topic/entry entry colsep-1 rowsep-0" headers="id__table_oxh_l4f_fdc__entry__1"><p class="- topic/p p" data-ofbid="d93181e542__20250519091514">注意事项</p></td>
|
||
<td class="- topic/entry entry colsep-0 rowsep-0" headers="id__table_oxh_l4f_fdc__entry__2"><p class="- topic/p p" data-ofbid="d93181e546__20250519091514">- </p></td>
|
||
</tr>
|
||
</tbody></table></div><div class="table-container"><table class="- topic/table table frame-all" id="id__table_pxh_l4f_fdc" data-ofbid="id__table_pxh_l4f_fdc" data-cols="2"><caption class="- topic/title title tablecap" data-caption-side="top" data-is-repeated="true"><span class="table--title-label">表<span class="table--title-label-number"> 4</span><span class="table--title-label-punctuation">. </span></span><span class="table--title">IOC_VE_PUT_CLIENT</span></caption><colgroup><col style="width:16.666666666666664%"/><col style="width:83.33333333333334%"/></colgroup><thead class="- topic/thead thead">
|
||
<tr class="- topic/row">
|
||
<th class="- topic/entry entry colsep-1 rowsep-1" id="id__table_pxh_l4f_fdc__entry__1"><p class="- topic/p p" data-ofbid="d93181e568__20250519091514">函数原型</p></th>
|
||
<th class="- topic/entry entry colsep-0 rowsep-1" id="id__table_pxh_l4f_fdc__entry__2"><p class="- topic/p p" data-ofbid="d93181e572__20250519091514">int drv_ve_control(struct aic_ve_client *client, int cmd,
|
||
void *arg)</p></th>
|
||
</tr>
|
||
</thead><tbody class="- topic/tbody tbody">
|
||
<tr class="- topic/row">
|
||
<td class="- topic/entry entry colsep-1 rowsep-1" headers="id__table_pxh_l4f_fdc__entry__1"><p class="- topic/p p" data-ofbid="d93181e582__20250519091514">功能说明</p></td>
|
||
<td class="- topic/entry entry colsep-0 rowsep-1" headers="id__table_pxh_l4f_fdc__entry__2"><p class="- topic/p p" data-ofbid="d93181e586__20250519091514">释放 VE 设备独占权限</p></td>
|
||
</tr>
|
||
<tr class="- topic/row">
|
||
<td class="- topic/entry entry colsep-1 rowsep-1" headers="id__table_pxh_l4f_fdc__entry__1"><p class="- topic/p p" data-ofbid="d93181e593__20250519091514">参数定义</p></td>
|
||
<td class="- topic/entry entry colsep-0 rowsep-1" headers="id__table_pxh_l4f_fdc__entry__2"><p class="- topic/p p" data-ofbid="d93181e597__20250519091514">
|
||
<div class="- topic/div div">
|
||
<div class="- topic/div div">client：VE 设备</div>
|
||
<div class="- topic/div div">cmd：IOC_VE_PUT_CLIENT</div>
|
||
<div class="- topic/div div">arg：NULL</div>
|
||
</div>
|
||
</p></td>
|
||
</tr>
|
||
<tr class="- topic/row">
|
||
<td class="- topic/entry entry colsep-1 rowsep-1" headers="id__table_pxh_l4f_fdc__entry__1"><p class="- topic/p p" data-ofbid="d93181e616__20250519091514">返回值</p></td>
|
||
<td class="- topic/entry entry colsep-0 rowsep-1" headers="id__table_pxh_l4f_fdc__entry__2"><p class="- topic/p p" data-ofbid="d93181e620__20250519091514">
|
||
<div class="- topic/div div">
|
||
<div class="- topic/div div"> 0：成功，其它：失败</div>
|
||
</div>
|
||
</p></td>
|
||
</tr>
|
||
<tr class="- topic/row">
|
||
<td class="- topic/entry entry colsep-1 rowsep-0" headers="id__table_pxh_l4f_fdc__entry__1"><p class="- topic/p p" data-ofbid="d93181e633__20250519091514">注意事项</p></td>
|
||
<td class="- topic/entry entry colsep-0 rowsep-0" headers="id__table_pxh_l4f_fdc__entry__2"><p class="- topic/p p" data-ofbid="d93181e637__20250519091514">- </p></td>
|
||
</tr>
|
||
</tbody></table></div><div class="table-container"><table class="- topic/table table frame-all" id="id__table_qxh_l4f_fdc" data-ofbid="id__table_qxh_l4f_fdc" data-cols="2"><caption class="- topic/title title tablecap" data-caption-side="top" data-is-repeated="true"><span class="table--title-label">表<span class="table--title-label-number"> 5</span><span class="table--title-label-punctuation">. </span></span><span class="table--title">IOC_VE_WAIT</span></caption><colgroup><col style="width:16.666666666666664%"/><col style="width:83.33333333333334%"/></colgroup><thead class="- topic/thead thead">
|
||
<tr class="- topic/row">
|
||
<th class="- topic/entry entry colsep-1 rowsep-1" id="id__table_qxh_l4f_fdc__entry__1"><p class="- topic/p p" data-ofbid="d93181e659__20250519091514">函数原型</p></th>
|
||
<th class="- topic/entry entry colsep-0 rowsep-1" id="id__table_qxh_l4f_fdc__entry__2"><p class="- topic/p p" data-ofbid="d93181e663__20250519091514">int drv_ve_control(struct aic_ve_client *client, int cmd,
|
||
void *arg)</p></th>
|
||
</tr>
|
||
</thead><tbody class="- topic/tbody tbody">
|
||
<tr class="- topic/row">
|
||
<td class="- topic/entry entry colsep-1 rowsep-1" headers="id__table_qxh_l4f_fdc__entry__1"><p class="- topic/p p" data-ofbid="d93181e673__20250519091514">功能说明</p></td>
|
||
<td class="- topic/entry entry colsep-0 rowsep-1" headers="id__table_qxh_l4f_fdc__entry__2"><p class="- topic/p p" data-ofbid="d93181e677__20250519091514">等待 VE 驱动编解码完成，并且获取 VE 寄存器状态</p></td>
|
||
</tr>
|
||
<tr class="- topic/row">
|
||
<td class="- topic/entry entry colsep-1 rowsep-1" headers="id__table_qxh_l4f_fdc__entry__1"><p class="- topic/p p" data-ofbid="d93181e684__20250519091514">参数定义</p></td>
|
||
<td class="- topic/entry entry colsep-0 rowsep-1" headers="id__table_qxh_l4f_fdc__entry__2"><p class="- topic/p p" data-ofbid="d93181e688__20250519091514">
|
||
<div class="- topic/div div">
|
||
<div class="- topic/div div"> client：drv_ve_open 返回的 VE 硬件实例</div>
|
||
<div class="- topic/div div">cmd：IOC_VE_WAIT</div>
|
||
<div class="- topic/div div">arg：指向 struct wait_info 指针</div>
|
||
</div>
|
||
</p></td>
|
||
</tr>
|
||
<tr class="- topic/row">
|
||
<td class="- topic/entry entry colsep-1 rowsep-1" headers="id__table_qxh_l4f_fdc__entry__1"><p class="- topic/p p" data-ofbid="d93181e707__20250519091514">返回值</p></td>
|
||
<td class="- topic/entry entry colsep-0 rowsep-1" headers="id__table_qxh_l4f_fdc__entry__2"><p class="- topic/p p" data-ofbid="d93181e711__20250519091514">
|
||
<div class="- topic/div div">
|
||
<div class="- topic/div div"> 0：成功，其它：失败</div>
|
||
</div>
|
||
</p></td>
|
||
</tr>
|
||
<tr class="- topic/row">
|
||
<td class="- topic/entry entry colsep-1 rowsep-0" headers="id__table_qxh_l4f_fdc__entry__1"><p class="- topic/p p" data-ofbid="d93181e724__20250519091514">注意事项</p></td>
|
||
<td class="- topic/entry entry colsep-0 rowsep-0" headers="id__table_qxh_l4f_fdc__entry__2"><p class="- topic/p p" data-ofbid="d93181e728__20250519091514">- </p></td>
|
||
</tr>
|
||
</tbody></table></div><div class="table-container"><table class="- topic/table table frame-all" id="id__table_rxh_l4f_fdc" data-ofbid="id__table_rxh_l4f_fdc" data-cols="2"><caption class="- topic/title title tablecap" data-caption-side="top" data-is-repeated="true"><span class="table--title-label">表<span class="table--title-label-number"> 6</span><span class="table--title-label-punctuation">. </span></span><span class="table--title">IOC_VE_RESET</span></caption><colgroup><col style="width:16.666666666666664%"/><col style="width:83.33333333333334%"/></colgroup><thead class="- topic/thead thead">
|
||
<tr class="- topic/row">
|
||
<th class="- topic/entry entry colsep-1 rowsep-1" id="id__table_rxh_l4f_fdc__entry__1"><p class="- topic/p p" data-ofbid="d93181e750__20250519091514">函数原型</p></th>
|
||
<th class="- topic/entry entry colsep-0 rowsep-1" id="id__table_rxh_l4f_fdc__entry__2"><p class="- topic/p p" data-ofbid="d93181e754__20250519091514">int drv_ve_control(struct aic_ve_client *client, int cmd,
|
||
void *arg)</p></th>
|
||
</tr>
|
||
</thead><tbody class="- topic/tbody tbody">
|
||
<tr class="- topic/row">
|
||
<td class="- topic/entry entry colsep-1 rowsep-1" headers="id__table_rxh_l4f_fdc__entry__1"><p class="- topic/p p" data-ofbid="d93181e764__20250519091514">功能说明</p></td>
|
||
<td class="- topic/entry entry colsep-0 rowsep-1" headers="id__table_rxh_l4f_fdc__entry__2"><p class="- topic/p p" data-ofbid="d93181e768__20250519091514">VE 驱动硬件复位</p></td>
|
||
</tr>
|
||
<tr class="- topic/row">
|
||
<td class="- topic/entry entry colsep-1 rowsep-1" headers="id__table_rxh_l4f_fdc__entry__1"><p class="- topic/p p" data-ofbid="d93181e775__20250519091514">参数定义</p></td>
|
||
<td class="- topic/entry entry colsep-0 rowsep-1" headers="id__table_rxh_l4f_fdc__entry__2"><p class="- topic/p p" data-ofbid="d93181e779__20250519091514">
|
||
<div class="- topic/div div">
|
||
<div class="- topic/div div">client：VE 设备</div>
|
||
<div class="- topic/div div">cmd：IOC_VE_RESET</div>
|
||
<div class="- topic/div div">arg：NULL</div>
|
||
</div>
|
||
</p></td>
|
||
</tr>
|
||
<tr class="- topic/row">
|
||
<td class="- topic/entry entry colsep-1 rowsep-1" headers="id__table_rxh_l4f_fdc__entry__1"><p class="- topic/p p" data-ofbid="d93181e798__20250519091514">返回值</p></td>
|
||
<td class="- topic/entry entry colsep-0 rowsep-1" headers="id__table_rxh_l4f_fdc__entry__2"><p class="- topic/p p" data-ofbid="d93181e802__20250519091514">
|
||
<div class="- topic/div div">
|
||
<div class="- topic/div div"> 0：成功，其它：失败</div>
|
||
</div>
|
||
</p></td>
|
||
</tr>
|
||
<tr class="- topic/row">
|
||
<td class="- topic/entry entry colsep-1 rowsep-0" headers="id__table_rxh_l4f_fdc__entry__1"><p class="- topic/p p" data-ofbid="d93181e815__20250519091514">注意事项</p></td>
|
||
<td class="- topic/entry entry colsep-0 rowsep-0" headers="id__table_rxh_l4f_fdc__entry__2"><p class="- topic/p p" data-ofbid="d93181e819__20250519091514">-</p></td>
|
||
</tr>
|
||
</tbody></table></div>
|
||
</div>
|
||
<div class="- topic/div div section" id="id__app-demo">
|
||
<strong class="+ topic/ph hi-d/b ph b">APP Demo 参考</strong>
|
||
<p class="- topic/p p" data-ofbid="d93181e832__20250519091514">以下 demo 实现 VE 驱动基本调用流程，具体可参考 mpp
|
||
代码（<span class="+ topic/ph sw-d/filepath ph filepath">packages/artinchip/mpp/ve/common/ve.c</span>）</p><pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="id__codeblock_sxh_l4f_fdc" data-ofbid="id__codeblock_sxh_l4f_fdc"> <em class="hl-comment">//* 1. 打开 VE</em>
|
||
<strong class="hl-keyword">struct</strong> aic_ve_client* client = drv_ve_open();
|
||
|
||
<em class="hl-comment">//* 2. 获取 VE 权限</em>
|
||
ioctl(client, IOC_VE_GET_CLIENT，NULL);
|
||
|
||
<em class="hl-comment">//* 3. 配置寄存器（省略）</em>
|
||
...
|
||
|
||
<em class="hl-comment">//* 4. 等 VE 中断</em>
|
||
<strong class="hl-keyword">struct</strong> wait_info wt_info;
|
||
wt_info.wait_time = VE_TIMEOUT;
|
||
<strong class="hl-keyword">int</strong> ret = drv_ve_control(client, IOC_VE_WAIT, &wt_info);
|
||
<strong class="hl-keyword">if</strong>(ret < <span class="hl-number">0</span>) {
|
||
<em class="hl-comment">// 中断超时,VE 硬件复位</em>
|
||
drv_ve_control(client, IOC_VE_RESET,NULL);
|
||
}
|
||
|
||
<em class="hl-comment">//* 5. 释放 VE 权限</em>
|
||
drv_ve_control(client, IOC_VE_PUT_CLIENT,NULL);
|
||
|
||
<em class="hl-comment">//* 6. 关闭 VE</em>
|
||
drv_ve_close(client);
|
||
</pre>
|
||
</div>
|
||
</section>
|
||
|
||
|
||
</div>
|
||
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<div class=" wh_topic_toc "><div class="wh_topic_label">在本页上</div><ul><li class="section-item"><div class="section-title"><a href="#id__section_xfj_m4f_fdc" data-tocid="id__section_xfj_m4f_fdc">模块架构</a></div></li><li class="section-item"><div class="section-title"><a href="#id__section_nkt_44f_fdc" data-tocid="id__section_nkt_44f_fdc">关键流程设计</a></div></li><li class="section-item"><div class="section-title"><a href="#id__section_lyv_t4f_fdc" data-tocid="id__section_lyv_t4f_fdc">数据结构设计</a></div></li><li class="section-item"><div class="section-title"><a href="#id__section_tm3_v4f_fdc" data-tocid="id__section_tm3_v4f_fdc">接口设计</a></div></li></ul></div>
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