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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://172.16.35.88/tasks/jdssno1uvvbf2mltu9kb9v3if05d5gopuakboe8hlud18rma/edit/F:/aicdita/aicdita-cn/topics/sdk/audio/audio_design_guide.dita">Edit online</a></span><h1 class="- topic/title title topictitle1" id="ariaid-title1">设计说明</h1><div class="date inPage">15 Jan 2024</div><div style="color: gray;">
Read time: 6 minute(s)
</div><div class="- topic/body body"><section class="- topic/section section" id="id__section_j4p_djv_ddc" data-ofbid="id__section_j4p_djv_ddc"><h2 class="- topic/title title sectiontitle">源码说明</h2>
<p class="- topic/p p" data-ofbid="d133095e24__20250121171606">源代码位于：</p>
<ul class="- topic/ul ul simple" id="id__ul_ygz_bjv_ddc" data-ofbid="id__ul_ygz_bjv_ddc"><li class="- topic/li li" data-ofbid="d133095e28__20250121171606">
<p class="- topic/p p" data-ofbid="d133095e30__20250121171606"><span class="+ topic/ph sw-d/filepath ph filepath">bsp/artinchip/drv/audio/drv_audio.c</span>:
Playback 的 driver 层驱动</p>
</li><li class="- topic/li li" data-ofbid="d133095e35__20250121171606">
<p class="- topic/p p" data-ofbid="d133095e37__20250121171606"><span class="+ topic/ph sw-d/filepath ph filepath">bsp/artinchip/drv/audio/drv_dmic.c</span>:
DMIC 的 driver 层驱动</p>
</li><li class="- topic/li li" data-ofbid="d133095e42__20250121171606">
<p class="- topic/p p" data-ofbid="d133095e44__20250121171606"><span class="+ topic/ph sw-d/filepath ph filepath">bsp/artinchip/drv/audio/drv_amic.c</span>:
AMIC 的 driver 层驱动</p>
</li><li class="- topic/li li" data-ofbid="d133095e49__20250121171606">
<p class="- topic/p p" data-ofbid="d133095e51__20250121171606"><span class="+ topic/ph sw-d/filepath ph filepath">bsp/artinchip/hal/audio/hal_audio.c</span>:
audio 模块的 hal 层驱动</p>
</li><li class="- topic/li li" data-ofbid="d133095e56__20250121171606">
<p class="- topic/p p" data-ofbid="d133095e58__20250121171606"><span class="+ topic/ph sw-d/filepath ph filepath">bsp/artinchip/include/hal/hal_audio.h</span>:
audio 模块的 hal 层头文件</p>
</li><li class="- topic/li li" data-ofbid="d133095e63__20250121171606">
<p class="- topic/p p" data-ofbid="d133095e65__20250121171606"><span class="+ topic/ph sw-d/filepath ph filepath">bsp/artinchip/include/hal/hal_audio_reg.h</span>:
audio 模块的 hal 层头文件，用于寄存器定义</p>
</li></ul>
</section><section class="- topic/section section" id="id__section_cvz_gjv_ddc" data-ofbid="id__section_cvz_gjv_ddc"><h2 class="- topic/title title sectiontitle">RT-Thread
Audio 框架</h2>
<p class="- topic/p p" data-ofbid="d133095e76__20250121171606"> RT-Thread 定义了一套音频框架，driver
层的驱动就是为了对接音频框架。音频框架在录音端和播放端采用了两种不同的机制，详细说明如下所示：</p>
<ul class="- topic/ul ul" id="id__ul_zhz_vlv_ddc" data-ofbid="id__ul_zhz_vlv_ddc"><li class="- topic/li li" data-ofbid="d133095e80__20250121171606"><strong class="+ topic/ph hi-d/b ph b">播放端框架</strong>
工作流程如下：<div class="- topic/p p" data-ofbid="d133095e84__20250121171606">应用层：<ol class="- topic/ol ol" id="id__ol_i1q_ylv_ddc" data-ofbid="id__ol_i1q_ylv_ddc"><li class="- topic/li li" data-ofbid="d133095e87__20250121171606">应用层从存储设备（如 SD 卡、文件系统等）中读取音频数据。</li><li class="- topic/li li" data-ofbid="d133095e89__20250121171606">读取到的音频数据被写入到内存池的 block 中。<p class="- topic/p p" data-ofbid="d133095e91__20250121171606">使用数据队列来管理这些内存池的
block，确保数据的有序传输。</p></li><li class="- topic/li li" data-ofbid="d133095e93__20250121171606">从数据队列中依次取出音频数据。</li><li class="- topic/li li" data-ofbid="d133095e95__20250121171606">将取出的音频数据写入到 audio buffer 中，audio buffer 是一个环形缓冲区。</li><li class="- topic/li li" data-ofbid="d133095e97__20250121171606">通过 DMA 将 audio buffer 中的音频数据写入到硬件的 TXFIFO 中进行播放。</li></ol></div><div class="- topic/p p" data-ofbid="d133095e99__20250121171606">驱动层：<ul class="- topic/ul ul" id="id__ul_j2r_dmv_ddc" data-ofbid="id__ul_j2r_dmv_ddc"><li class="- topic/li li" data-ofbid="d133095e102__20250121171606">确保音频数据的及时写入。</li><li class="- topic/li li" data-ofbid="d133095e104__20250121171606">利用 DMA 技术将音频数据高效地搬运到硬件的 TXFIFO 中。</li></ul></div><figure class="- topic/fig fig fignone" id="id__fig_t4g_bjv_ddc" data-ofbid="id__fig_t4g_bjv_ddc"><br/><div class="imagecenter"><img class="- topic/image image imagecenter" id="id__image_u4g_bjv_ddc" src="../../../images/media/playback_arch1.png" alt="playback_arch1"/></div><br/></figure>
</li><li class="- topic/li li" data-ofbid="d133095e111__20250121171606">
<div class="- topic/div div section" id="id__id5"><strong class="+ topic/ph hi-d/b ph b">录音端框架</strong>工作流程如下：<div class="- topic/p p" data-ofbid="d133095e117__20250121171606">应用层：<ol class="- topic/ol ol" id="id__ol_skx_fmv_ddc" data-ofbid="id__ol_skx_fmv_ddc"><li class="- topic/li li" data-ofbid="d133095e120__20250121171606">在录音端框架中，虚拟了一个 pipe 设备，这个设备实际上是一个 ringbuffer。<p class="- topic/p p" data-ofbid="d133095e122__20250121171606">driver 层驱动负责管理一个
RX buffer，RX buffer 也是一个环形缓冲区。</p></li><li class="- topic/li li" data-ofbid="d133095e124__20250121171606">DMA 负责将麦克风（MIC）接收到的数据搬运到 RX buffer 中。</li><li class="- topic/li li" data-ofbid="d133095e126__20250121171606">DMA 再通过写 pipe 设备将音频数据写入到 pipe 的 ringbuffer 中。</li><li class="- topic/li li" data-ofbid="d133095e128__20250121171606">应用层代码通过 <span class="+ topic/keyword pr-d/apiname keyword apiname">rt_device_read</span> 每次从 pipe 设备中读取音频数据。</li><li class="- topic/li li" data-ofbid="d133095e133__20250121171606">读取到的音频数据可以进一步处理并写入到 WAV 文件中。</li></ol></div><div class="- topic/p p" data-ofbid="d133095e135__20250121171606">驱动层：<ul class="- topic/ul ul" id="id__ul_gdb_kmv_ddc" data-ofbid="id__ul_gdb_kmv_ddc"><li class="- topic/li li" data-ofbid="d133095e138__20250121171606">管理 RX buffer，确保从麦克风接收到的数据能够及时存入环形缓冲区。</li><li class="- topic/li li" data-ofbid="d133095e140__20250121171606">利用 DMA 技术高效地将音频数据从硬件搬运到软件层面进行处理。</li></ul></div><figure class="- topic/fig fig fignone" id="id__fig_ol4_bjv_ddc" data-ofbid="id__fig_ol4_bjv_ddc"><br/><div class="imagecenter"><img class="- topic/image image imagecenter" id="id__image_pl4_bjv_ddc" src="../../../images/media/record_arch1.png" alt="record_arch1"/></div><br/></figure></div>
</li></ul>
</section></div><article class="- topic/topic topic nested1" aria-labelledby="ariaid-title2" xml:lang="zh-CN" lang="zh-CN" id="topic_rkk_kjv_ddc"><span class="edit-link" style="font-size:12px; opacity:0.6; text-align:right; vertical-align:middle"><a target="_blank" href="http://172.16.35.88/tasks/jdssno1uvvbf2mltu9kb9v3if05d5gopuakboe8hlud18rma/edit/F:/aicdita/aicdita-cn/topics/sdk/audio/audio_design_guide.dita">Edit online</a></span><h2 class="- topic/title title topictitle2" id="ariaid-title2">关键流程设计</h2><div class="- topic/body body"><section class="- topic/section section" id="topic_rkk_kjv_ddc__id6" data-ofbid="topic_rkk_kjv_ddc__id6"><h3 class="- topic/title title sectiontitle">Audio
初始化流程</h3>
<ol class="- topic/ol ol arabic simple" id="topic_rkk_kjv_ddc__ol_cqb_cjv_ddc" data-ofbid="topic_rkk_kjv_ddc__ol_cqb_cjv_ddc"><li class="- topic/li li" data-ofbid="d133095e175__20250121171606">
<p class="- topic/p p" data-ofbid="d133095e177__20250121171606">初始化 audio 模块时钟频率</p>
</li><li class="- topic/li li" data-ofbid="d133095e180__20250121171606">
<p class="- topic/p p" data-ofbid="d133095e182__20250121171606">释放 reset 和 clock 信号</p>
</li><li class="- topic/li li" data-ofbid="d133095e185__20250121171606">
<p class="- topic/p p" data-ofbid="d133095e187__20250121171606">注册音频设备，playback 端注册为 <span class="+ topic/keyword pr-d/parmname keyword parmname">sound0</span> 设备，DMIC 注册为
<span class="+ topic/keyword pr-d/parmname keyword parmname">dmic0</span> 设备，AMIC 注册为 <span class="+ topic/keyword pr-d/parmname keyword parmname">amic0</span> 设备</p>
</li></ol>
</section><section class="- topic/section section" id="topic_rkk_kjv_ddc__section_fhx_vnv_ddc" data-ofbid="topic_rkk_kjv_ddc__section_fhx_vnv_ddc"><h3 class="- topic/title title sectiontitle">Playback 流程</h3>
<div class="- topic/div div">
<p class="- topic/p p" data-ofbid="d133095e207__20250121171606">在 Playback 端，DMA 通知 CPU 向 TX buffer 中填充新的音频数据，以确保 DMA 传输的连续性。具体流程如下所示：</p>
<ol class="- topic/ol ol" id="topic_rkk_kjv_ddc__ul_fhx_vnv_ddc" data-ofbid="topic_rkk_kjv_ddc__ul_fhx_vnv_ddc"><li class="- topic/li li" data-ofbid="d133095e211__20250121171606"><strong class="+ topic/ph hi-d/b ph b">初始化 DMA 传输参数</strong><ol class="- topic/ol ol arabic simple" type="a" id="topic_rkk_kjv_ddc__ol_dqb_cjv_ddc" data-ofbid="topic_rkk_kjv_ddc__ol_dqb_cjv_ddc"><li class="- topic/li li" data-ofbid="d133095e215__20250121171606">
<p class="- topic/p p" data-ofbid="d133095e217__20250121171606">配置 DMA 传输的起始地址，buf_len 以及 period_len</p>
<p class="- topic/p p" data-ofbid="d133095e220__20250121171606"> audio 模块使用 DMA 传输音频数据，DMA 采用环形链表形式，依次将音频数据传送到硬件。所以需要配置 DMA
传输时的起始地址（即 TX buffer 地址）以及 buf_len，period_len。</p>
<p class="- topic/p p" data-ofbid="d133095e223__20250121171606">在 driver 层驱动，将 buf_len 配置为 period_len 的 4 倍，DMA 每传输
period_len 长度的数据，触发一次 DMA 中断，通知 CPU 向 TX buffer 中写入数据。</p>
</li><li class="- topic/li li" data-ofbid="d133095e226__20250121171606">
<p class="- topic/p p" data-ofbid="d133095e228__20250121171606">注册 hal 层的回调函数</p>
</li></ol></li><li class="- topic/li li" data-ofbid="d133095e231__20250121171606"><strong class="+ topic/ph hi-d/b ph b">开始播放</strong><ol class="- topic/ol ol arabic simple" type="a" id="topic_rkk_kjv_ddc__ol_eqb_cjv_ddc" data-ofbid="topic_rkk_kjv_ddc__ol_eqb_cjv_ddc"><li class="- topic/li li" data-ofbid="d133095e235__20250121171606">
<p class="- topic/p p" data-ofbid="d133095e237__20250121171606">根据 menuconfig 配置音频通路</p>
</li><li class="- topic/li li" data-ofbid="d133095e240__20250121171606">
<p class="- topic/p p" data-ofbid="d133095e242__20250121171606">填充 TX buffer</p>
<p class="- topic/p p" data-ofbid="d133095e245__20250121171606">为保证 DMA 传输音频数据的连续性，需要在 DMA 开始传输前，先向 TX buffer 中填充数据。在
playback 的 driver 层驱动，是将 TX buffer 填充满后，才开始 DMA 的传输。</p>
</li><li class="- topic/li li" data-ofbid="d133095e248__20250121171606">
<p class="- topic/p p" data-ofbid="d133095e250__20250121171606">设置 DMA 传输的参数，调用 <span class="+ topic/keyword pr-d/apiname keyword apiname">hal_audio_playback_start</span>
开始音频数据传输</p>
</li><li class="- topic/li li" data-ofbid="d133095e256__20250121171606">
<p class="- topic/p p" data-ofbid="d133095e258__20250121171606">使能 Power Amplifier (PA)</p>
</li></ol></li><li class="- topic/li li" data-ofbid="d133095e261__20250121171606"><strong class="+ topic/ph hi-d/b ph b">DMA 中断触发</strong><ol class="- topic/ol ol" type="a" id="topic_rkk_kjv_ddc__ol_zjx_rpv_ddc" data-ofbid="topic_rkk_kjv_ddc__ol_zjx_rpv_ddc"><li class="- topic/li li" data-ofbid="d133095e265__20250121171606">
<p class="- topic/p p" data-ofbid="d133095e267__20250121171606">DMA 每传输完 period_len 长度的数据后，触发一次 DMA 中断。</p>
</li><li class="- topic/li li" data-ofbid="d133095e270__20250121171606">
<p class="- topic/p p" data-ofbid="d133095e272__20250121171606">通过 DMA 回调函数的逐级调用，最终调用
<span class="+ topic/keyword pr-d/apiname keyword apiname">rt_audio_tx_complete</span>。</p>
</li><li class="- topic/li li" data-ofbid="d133095e278__20250121171606">
<p class="- topic/p p" data-ofbid="d133095e280__20250121171606"><span class="+ topic/keyword pr-d/apiname keyword apiname">rt_audio_tx_complete</span> 回调函数对 TX buffer
进行填充，每次填充 period_len 长度的音频数据。</p>
</li></ol></li></ol>
</div>
</section><section class="- topic/section section" id="topic_rkk_kjv_ddc__section_gzv_g4v_ddc" data-ofbid="topic_rkk_kjv_ddc__section_gzv_g4v_ddc"><h3 class="- topic/title title sectiontitle">Record 流程</h3>
<div class="- topic/div div section" id="topic_rkk_kjv_ddc__record">
<p class="- topic/p p" data-ofbid="d133095e294__20250121171606">在 Record 端，DMA 中断用于通知 CPU 将 RX buffer 的数据写入到 pipe 设备，以实现音频数据的连续录制。</p>
<ol class="- topic/ol ol" id="topic_rkk_kjv_ddc__ul_zbt_j4v_ddc" data-ofbid="topic_rkk_kjv_ddc__ul_zbt_j4v_ddc"><li class="- topic/li li" data-ofbid="d133095e298__20250121171606"><strong class="+ topic/ph hi-d/b ph b">初始化 DMA 传输参数</strong><ol class="- topic/ol ol arabic simple" type="a" id="topic_rkk_kjv_ddc__ol_fqb_cjv_ddc" data-ofbid="topic_rkk_kjv_ddc__ol_fqb_cjv_ddc"><li class="- topic/li li" data-ofbid="d133095e302__20250121171606">
<p class="- topic/p p" data-ofbid="d133095e304__20250121171606">初始化 DMA 传输的起始地址，buf_len 以及 period_len</p>
<p class="- topic/p p" data-ofbid="d133095e307__20250121171606"> audio 模块使用 DMA 传输音频数据，DMA 采用环形链表形式，依次将音频数据传送到硬件。所以需要配置 DMA
传输时的起始地址（即 RX buffer 地址）以及 buf_len，period_len。在 driver 层驱动，将
buf_len 配置为 period_len 的 2 倍，DMA 每传输 period_len 长度的数据，触发一次
DMA 中断，通知 CPU 向 pipe 设备写入数据。</p>
</li><li class="- topic/li li" data-ofbid="d133095e310__20250121171606">
<p class="- topic/p p" data-ofbid="d133095e312__20250121171606">注册 hal 层的回调函数</p>
</li></ol></li><li class="- topic/li li" data-ofbid="d133095e315__20250121171606"><strong class="+ topic/ph hi-d/b ph b">开始录音</strong><ol class="- topic/ol ol" type="a" id="topic_rkk_kjv_ddc__ol_qdf_xpv_ddc" data-ofbid="topic_rkk_kjv_ddc__ol_qdf_xpv_ddc"><li class="- topic/li li" data-ofbid="d133095e319__20250121171606">执行 <span class="+ topic/keyword pr-d/apiname keyword apiname">rt_device_open</span> 时，会调用 start 流程，开始音频的录制。</li><li class="- topic/li li" data-ofbid="d133095e324__20250121171606">通过 <span class="+ topic/keyword pr-d/apiname keyword apiname">rt_device_control</span>
设置音频的格式（采样率，通道数等）。<p class="- topic/p p" data-ofbid="d133095e329__20250121171606">最开始可能会录制一段不符合设置的音频格式的数据，为了避免出现这种情况，在
driver 层的驱动实现中，start 流程并未做任何处理，而是在设置完音频格式后才开始音频的录制。</p></li></ol></li><li class="- topic/li li" data-ofbid="d133095e331__20250121171606"><strong class="+ topic/ph hi-d/b ph b">DMA 中断流程</strong><ol class="- topic/ol ol" type="a" id="topic_rkk_kjv_ddc__ol_a3d_dqv_ddc" data-ofbid="topic_rkk_kjv_ddc__ol_a3d_dqv_ddc"><li class="- topic/li li" data-ofbid="d133095e335__20250121171606">DMA 每传输完 period_len 长度的数据后，触发一次 DMA 中断。</li><li class="- topic/li li" data-ofbid="d133095e337__20250121171606">通过 DMA 回调函数的逐级调用，最终调用 <span class="+ topic/keyword pr-d/apiname keyword apiname">rt_audio_rx_done</span>。</li><li class="- topic/li li" data-ofbid="d133095e342__20250121171606"><span class="+ topic/keyword pr-d/apiname keyword apiname">rt_audio_rx_done</span> 将 RX buffer 的数据写入到 pipe
设备，每次写入 period_len 长度的音频数据。</li></ol></li></ol>
</div>
</section></div></article><article class="- topic/topic topic nested1" aria-labelledby="ariaid-title3" xml:lang="zh-CN" lang="zh-CN" id="topic_nqz_rmv_ddc"><span class="edit-link" style="font-size:12px; opacity:0.6; text-align:right; vertical-align:middle"><a target="_blank" href="http://172.16.35.88/tasks/jdssno1uvvbf2mltu9kb9v3if05d5gopuakboe8hlud18rma/edit/F:/aicdita/aicdita-cn/topics/sdk/audio/audio_design_guide.dita">Edit online</a></span><h2 class="- topic/title title topictitle2" id="ariaid-title3">数据结构设计</h2><div class="- topic/body body"><section class="- topic/section section" id="topic_nqz_rmv_ddc__hal" data-ofbid="topic_nqz_rmv_ddc__hal"><h3 class="- topic/title title sectiontitle">hal
层数据结构</h3>
<div class="- topic/div div section" id="topic_nqz_rmv_ddc__driver"><strong class="+ topic/ph hi-d/b ph b">
</strong><pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="topic_nqz_rmv_ddc__codeblock_hml_ykv_ddc" data-ofbid="topic_nqz_rmv_ddc__codeblock_hml_ykv_ddc"><strong class="hl-keyword">struct</strong> aic_audio_buf_info
{
<strong class="hl-keyword">void</strong> *buf;
uint32_t buf_len;
uint32_t period_len;
};
<strong class="hl-keyword">struct</strong> aic_audio_transfer_info
{
<strong class="hl-keyword">struct</strong> aic_dma_chan *dma_chan;
<strong class="hl-keyword">struct</strong> aic_audio_buf_info buf_info;
<strong class="hl-keyword">int</strong> transfer_type;
};
<strong class="hl-keyword">struct</strong> aic_audio_ctrl
{
<strong class="hl-keyword">unsigned</strong> <strong class="hl-keyword">long</strong> reg_base;
uint32_t irq_num;
uint32_t clk_id;
<strong class="hl-keyword">struct</strong> aic_audio_transfer_info tx_info; <em class="hl-comment">//TX buffer 的参数</em>
<strong class="hl-keyword">struct</strong> aic_audio_transfer_info dmic_info; <em class="hl-comment">//DMIC RX buffer 的参数</em>
<strong class="hl-keyword">struct</strong> aic_audio_transfer_info amic_info; <em class="hl-comment">//AMIC RX buffer 的参数</em>
audio_callback callback;
<strong class="hl-keyword">void</strong> *arg;
<strong class="hl-keyword">struct</strong> aic_audio_config config;
};</pre></div>
</section><section class="- topic/section section" id="topic_nqz_rmv_ddc__section_tnz_vmv_ddc" data-ofbid="topic_nqz_rmv_ddc__section_tnz_vmv_ddc"><h3 class="- topic/title title sectiontitle">driver 层数据结构</h3>
</section><div class="- topic/div div section" id="topic_nqz_rmv_ddc__id12"><strong class="+ topic/ph hi-d/b ph b"></strong><pre class="+ topic/pre pr-d/codeblock pre codeblock language-c" id="topic_nqz_rmv_ddc__codeblock_udk_zkv_ddc" data-ofbid="topic_nqz_rmv_ddc__codeblock_udk_zkv_ddc"><strong class="hl-keyword">struct</strong> aic_audio
{
<strong class="hl-keyword">struct</strong> rt_audio_device audio;
aic_audio_ctrl codec;
rt_uint8_t volume; <em class="hl-comment">//playback 音量</em>
<strong class="hl-keyword">char</strong> *pa_name; <em class="hl-comment">//PA 引脚的名字</em>
<strong class="hl-keyword">unsigned</strong> <strong class="hl-keyword">int</strong> gpio_pa; <em class="hl-comment">//PA 引脚的 IO 口号</em>
};
<strong class="hl-keyword">struct</strong> aic_dmic
{
<strong class="hl-keyword">struct</strong> rt_audio_device audio;
aic_audio_ctrl codec;
rt_uint8_t volume;
uint8_t index;
};</pre></div></div></article><article class="- topic/topic topic nested1 section" aria-labelledby="ariaid-title4" xml:lang="zh-CN" lang="zh-CN" id="id13"><span class="edit-link" style="font-size:12px; opacity:0.6; text-align:right; vertical-align:middle"><a target="_blank" href="http://172.16.35.88/tasks/jdssno1uvvbf2mltu9kb9v3if05d5gopuakboe8hlud18rma/edit/F:/aicdita/aicdita-cn/topics/sdk/audio/audio_design_guide.dita">Edit online</a></span><h2 class="- topic/title title topictitle2" id="ariaid-title4">接口设计</h2><div class="- topic/body body"><section class="- topic/section section" id="id13__section_hlv_n4v_ddc" data-ofbid="id13__section_hlv_n4v_ddc"><h3 class="- topic/title title sectiontitle"><strong class="+ topic/ph hi-d/b ph b">Driver
层接口设计</strong></h3>
<p class="- topic/p p" data-ofbid="d133095e382__20250121171606">Driver
层将 audio 定义为 <span class="+ topic/keyword pr-d/parmname keyword parmname">sound0</span> ， <span class="+ topic/keyword pr-d/parmname keyword parmname">dmic0</span> ,
<span class="+ topic/keyword pr-d/parmname keyword parmname">amic0</span> 三个设备，三个设备在 Driver 层的接口基本相同，下面以 playback 端的接口进行说明。</p>
<div class="table-container"><table class="- topic/table table frame-all" id="id13__table_gqb_cjv_ddc" data-ofbid="id13__table_gqb_cjv_ddc" 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_audio_init</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="id13__table_gqb_cjv_ddc__entry__1">函数原型</th><th class="- topic/entry entry colsep-0 rowsep-1" id="id13__table_gqb_cjv_ddc__entry__2">rt_err_t drv_audio_init(struct rt_audio_device
*audio)</th></tr></thead><tbody class="- topic/tbody tbody"><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="id13__table_gqb_cjv_ddc__entry__1">功能说明</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="id13__table_gqb_cjv_ddc__entry__2">playback 端的初始化函数</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="id13__table_gqb_cjv_ddc__entry__1">参数定义</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="id13__table_gqb_cjv_ddc__entry__2">audio：指向 playback 设备的指针</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="id13__table_gqb_cjv_ddc__entry__1">返回值</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="id13__table_gqb_cjv_ddc__entry__2">RT_EOK：执行成功</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-0" headers="id13__table_gqb_cjv_ddc__entry__1">注意事项</td><td class="- topic/entry entry colsep-0 rowsep-0" headers="id13__table_gqb_cjv_ddc__entry__2">-</td></tr></tbody></table></div>
<div class="table-container"><table class="- topic/table table frame-all" id="id13__table_hqb_cjv_ddc" data-ofbid="id13__table_hqb_cjv_ddc" 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_audio_buffer_info</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="id13__table_hqb_cjv_ddc__entry__1">函数原型</th><th class="- topic/entry entry colsep-0 rowsep-1" id="id13__table_hqb_cjv_ddc__entry__2">void drv_audio_buffer_info(struct rt_audio_device *audio,
struct rt_audio_buf_info *info)</th></tr></thead><tbody class="- topic/tbody tbody"><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="id13__table_hqb_cjv_ddc__entry__1">功能说明</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="id13__table_hqb_cjv_ddc__entry__2">获取 playback 端的 TX buffer 参数</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="id13__table_hqb_cjv_ddc__entry__1">参数定义</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="id13__table_hqb_cjv_ddc__entry__2">
<div class="- topic/div div">
<div class="- topic/div div"> audio：指向 playback 设备的指针</div>
<div class="- topic/div div">info：用于获取 TX buffer 参数的指针</div>
</div>
</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="id13__table_hqb_cjv_ddc__entry__1">返回值</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="id13__table_hqb_cjv_ddc__entry__2">无</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-0" headers="id13__table_hqb_cjv_ddc__entry__1">注意事项</td><td class="- topic/entry entry colsep-0 rowsep-0" headers="id13__table_hqb_cjv_ddc__entry__2">-</td></tr></tbody></table></div>
<div class="table-container"><table class="- topic/table table frame-all" id="id13__table_iqb_cjv_ddc" data-ofbid="id13__table_iqb_cjv_ddc" 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">drv_audio_start</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="id13__table_iqb_cjv_ddc__entry__1">函数原型</th><th class="- topic/entry entry colsep-0 rowsep-1" id="id13__table_iqb_cjv_ddc__entry__2">rt_err_t drv_audio_start(struct rt_audio_device *audio, int
stream)</th></tr></thead><tbody class="- topic/tbody tbody"><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="id13__table_iqb_cjv_ddc__entry__1">功能说明</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="id13__table_iqb_cjv_ddc__entry__2">开始 playback 端播放</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="id13__table_iqb_cjv_ddc__entry__1">参数定义</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="id13__table_iqb_cjv_ddc__entry__2">
<div class="- topic/div div">
<div class="- topic/div div"> audio：指向 playback 设备的指针</div>
<div class="- topic/div div"> stream：音频数据流方向</div>
</div>
</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="id13__table_iqb_cjv_ddc__entry__1">返回值</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="id13__table_iqb_cjv_ddc__entry__2">
<div class="- topic/div div">
<div class="- topic/div div"> RT_EOK：执行成功</div>
<div class="- topic/div div"> -RT_EINVAL：参数非法</div>
</div>
</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-0" headers="id13__table_iqb_cjv_ddc__entry__1">注意事项</td><td class="- topic/entry entry colsep-0 rowsep-0" headers="id13__table_iqb_cjv_ddc__entry__2">-</td></tr></tbody></table></div>
<div class="table-container"><table class="- topic/table table frame-all" id="id13__table_jqb_cjv_ddc" data-ofbid="id13__table_jqb_cjv_ddc" 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">drv_audio_stop</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="id13__table_jqb_cjv_ddc__entry__1">函数原型</th><th class="- topic/entry entry colsep-0 rowsep-1" id="id13__table_jqb_cjv_ddc__entry__2">rt_err_t drv_audio_stop(struct rt_audio_device *audio, int
stream)</th></tr></thead><tbody class="- topic/tbody tbody"><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="id13__table_jqb_cjv_ddc__entry__1">功能说明</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="id13__table_jqb_cjv_ddc__entry__2">结束 playback 端播放</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="id13__table_jqb_cjv_ddc__entry__1">参数定义</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="id13__table_jqb_cjv_ddc__entry__2">
<div class="- topic/div div">
<div class="- topic/div div"> audio：指向 playback 设备的指针</div>
<div class="- topic/div div"> stream：音频数据流方向</div>
</div>
</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="id13__table_jqb_cjv_ddc__entry__1">返回值</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="id13__table_jqb_cjv_ddc__entry__2">
<div class="- topic/div div">
<div class="- topic/div div"> RT_EOK：执行成功</div>
<div class="- topic/div div"> -RT_EINVAL：参数非法</div>
</div>
</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-0" headers="id13__table_jqb_cjv_ddc__entry__1">注意事项</td><td class="- topic/entry entry colsep-0 rowsep-0" headers="id13__table_jqb_cjv_ddc__entry__2">-</td></tr></tbody></table></div>
<div class="table-container"><table class="- topic/table table frame-all" id="id13__table_kqb_cjv_ddc" data-ofbid="id13__table_kqb_cjv_ddc" 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">drv_audio_pause</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="id13__table_kqb_cjv_ddc__entry__1">函数原型</th><th class="- topic/entry entry colsep-0 rowsep-1" id="id13__table_kqb_cjv_ddc__entry__2">rt_err_t drv_audio_pause(struct rt_audio_device *audio, int
enable)</th></tr></thead><tbody class="- topic/tbody tbody"><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="id13__table_kqb_cjv_ddc__entry__1">功能说明</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="id13__table_kqb_cjv_ddc__entry__2">暂停/恢复 playback 端播放</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="id13__table_kqb_cjv_ddc__entry__1">参数定义</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="id13__table_kqb_cjv_ddc__entry__2">
<div class="- topic/div div">
<div class="- topic/div div"> audio：指向 playback 设备的指针</div>
<div class="- topic/div div"> enable：playback 端暂停和恢复播放使能位(0 为恢复，非 0 为暂停)</div>
</div>
</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="id13__table_kqb_cjv_ddc__entry__1">返回值</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="id13__table_kqb_cjv_ddc__entry__2">
<div class="- topic/div div">
<div class="- topic/div div"> RT_EOK：执行成功</div>
</div>
</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-0" headers="id13__table_kqb_cjv_ddc__entry__1">注意事项</td><td class="- topic/entry entry colsep-0 rowsep-0" headers="id13__table_kqb_cjv_ddc__entry__2">-</td></tr></tbody></table></div>
<div class="table-container"><table class="- topic/table table frame-all" id="id13__table_lqb_cjv_ddc" data-ofbid="id13__table_lqb_cjv_ddc" 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">drv_audio_configure</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="id13__table_lqb_cjv_ddc__entry__1">函数原型</th><th class="- topic/entry entry colsep-0 rowsep-1" id="id13__table_lqb_cjv_ddc__entry__2">rt_err_t drv_audio_configure(struct rt_audio_device *audio,
struct rt_audio_caps *caps)</th></tr></thead><tbody class="- topic/tbody tbody"><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="id13__table_lqb_cjv_ddc__entry__1">功能原型</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="id13__table_lqb_cjv_ddc__entry__2">音频设备配置接口，用于配置采样格式，采样率，通道数等接口</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="id13__table_lqb_cjv_ddc__entry__1">参数定义</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="id13__table_lqb_cjv_ddc__entry__2">
<div class="- topic/div div">
<div class="- topic/div div">audio：指向 playback 设备的指针</div>
<div class="- topic/div div"> caps：指向配置参数的指针</div>
</div>
</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="id13__table_lqb_cjv_ddc__entry__1">返回值</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="id13__table_lqb_cjv_ddc__entry__2">
<div class="- topic/div div">
<div class="- topic/div div">RT_EOK：执行成功</div>
<div class="- topic/div div"> -RT_ERROR：参数不支持</div>
</div>
</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-0" headers="id13__table_lqb_cjv_ddc__entry__1">注意事项</td><td class="- topic/entry entry colsep-0 rowsep-0" headers="id13__table_lqb_cjv_ddc__entry__2">-</td></tr></tbody></table></div>
<div class="table-container"><table class="- topic/table table frame-all" id="id13__table_mqb_cjv_ddc" data-ofbid="id13__table_mqb_cjv_ddc" 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"> 7</span><span class="table--title-label-punctuation">. </span></span><span class="table--title">drv_audio_getcaps</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="id13__table_mqb_cjv_ddc__entry__1">函数原型</th><th class="- topic/entry entry colsep-0 rowsep-1" id="id13__table_mqb_cjv_ddc__entry__2">rt_err_t drv_audio_getcaps(struct rt_audio_device *audio,
struct rt_audio_caps *caps)</th></tr></thead><tbody class="- topic/tbody tbody"><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="id13__table_mqb_cjv_ddc__entry__1">功能说明</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="id13__table_mqb_cjv_ddc__entry__2">获取音频设备的参数</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="id13__table_mqb_cjv_ddc__entry__1">参数定义</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="id13__table_mqb_cjv_ddc__entry__2">
<div class="- topic/div div">
<div class="- topic/div div">audio：指向 playback 设备的指针</div>
<div class="- topic/div div">caps：指向配置参数的指针</div>
</div>
</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="id13__table_mqb_cjv_ddc__entry__1">返回值</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="id13__table_mqb_cjv_ddc__entry__2">
<div class="- topic/div div">
<div class="- topic/div div">RT_EOK：执行成功</div>
<div class="- topic/div div">-RT_ERROR：参数不支持</div>
</div>
</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-0" headers="id13__table_mqb_cjv_ddc__entry__1">注意事项</td><td class="- topic/entry entry colsep-0 rowsep-0" headers="id13__table_mqb_cjv_ddc__entry__2">-</td></tr></tbody></table></div>
<div class="table-container"><table class="- topic/table table frame-all" id="id13__table_nqb_cjv_ddc" data-ofbid="id13__table_nqb_cjv_ddc" 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"> 8</span><span class="table--title-label-punctuation">. </span></span><span class="table--title">drv_audio_get_playback_avail</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="id13__table_nqb_cjv_ddc__entry__1">函数原型</th><th class="- topic/entry entry colsep-0 rowsep-1" id="id13__table_nqb_cjv_ddc__entry__2">rt_size_t drv_audio_get_playback_avail(struct rt_audio_device
*audio)</th></tr></thead><tbody class="- topic/tbody tbody"><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="id13__table_nqb_cjv_ddc__entry__1">功能说明</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="id13__table_nqb_cjv_ddc__entry__2">获取 playback 端缓存的数据大小</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="id13__table_nqb_cjv_ddc__entry__1">参数定义</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="id13__table_nqb_cjv_ddc__entry__2">
<div class="- topic/div div">
<div class="- topic/div div">audio：指向 playback 设备的指针</div>
</div>
</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="id13__table_nqb_cjv_ddc__entry__1">返回值</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="id13__table_nqb_cjv_ddc__entry__2">
<div class="- topic/div div">
<div class="- topic/div div">缓存数据的大小</div>
</div>
</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-0" headers="id13__table_nqb_cjv_ddc__entry__1">注意事项</td><td class="- topic/entry entry colsep-0 rowsep-0" headers="id13__table_nqb_cjv_ddc__entry__2">-</td></tr></tbody></table></div>
</section><section class="- topic/section section" id="id13__section_hqn_p4v_ddc" data-ofbid="id13__section_hqn_p4v_ddc"><h3 class="- topic/title title sectiontitle">HAL 层接口设计</h3>
<div class="- topic/p p" data-ofbid="d133095e780__20250121171606">
<div class="- topic/div div section" id="id13__id14">
<p class="- topic/p p" data-ofbid="d133095e784__20250121171606">HAL 层接口也是分 playback、DMIC、AMIC 三部分进行设计，下面以 playback 端的接口进行说明。</p>
</div>
<div class="table-container"><table class="- topic/table table frame-all" id="id13__table_oqb_cjv_ddc" data-ofbid="id13__table_oqb_cjv_ddc" 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"> 9</span><span class="table--title-label-punctuation">. </span></span><span class="table--title">hal_audio_set_samplerate</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="id13__table_oqb_cjv_ddc__entry__1">函数原型</th><th class="- topic/entry entry colsep-0 rowsep-1" id="id13__table_oqb_cjv_ddc__entry__2">void hal_audio_set_samplerate(aic_audio_ctrl *codec,
uint32_t samplerate)</th></tr></thead><tbody class="- topic/tbody tbody"><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="id13__table_oqb_cjv_ddc__entry__1">功能说明</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="id13__table_oqb_cjv_ddc__entry__2">设置采样率</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="id13__table_oqb_cjv_ddc__entry__1">参数定义</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="id13__table_oqb_cjv_ddc__entry__2">
<div class="- topic/div div">
<div class="- topic/div div">codec：指向 aic_audio_ctrl 的指针</div>
<div class="- topic/div div">samplerate：采样率</div>
</div>
</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="id13__table_oqb_cjv_ddc__entry__1">返回值</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="id13__table_oqb_cjv_ddc__entry__2">无</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-0" headers="id13__table_oqb_cjv_ddc__entry__1">注意事项</td><td class="- topic/entry entry colsep-0 rowsep-0" headers="id13__table_oqb_cjv_ddc__entry__2">-</td></tr></tbody></table></div>
<div class="table-container"><table class="- topic/table table frame-all" id="id13__table_pqb_cjv_ddc" data-ofbid="id13__table_pqb_cjv_ddc" 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"> 10</span><span class="table--title-label-punctuation">. </span></span><span class="table--title">hal_audio_set_playback_channel</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="id13__table_pqb_cjv_ddc__entry__1">函数原型</th><th class="- topic/entry entry colsep-0 rowsep-1" id="id13__table_pqb_cjv_ddc__entry__2">void hal_audio_set_playback_channel(aic_audio_ctrl
*codec, uint32_t ch)</th></tr></thead><tbody class="- topic/tbody tbody"><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="id13__table_pqb_cjv_ddc__entry__1">功能说明</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="id13__table_pqb_cjv_ddc__entry__2">设置 playback 端的通道数</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="id13__table_pqb_cjv_ddc__entry__1">参数定义</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="id13__table_pqb_cjv_ddc__entry__2">
<div class="- topic/div div">codec：指向 aic_audio_ctrl 的指针</div>
<div class="- topic/div div">ch：通道数</div>
</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="id13__table_pqb_cjv_ddc__entry__1">返回值</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="id13__table_pqb_cjv_ddc__entry__2">无</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-0" headers="id13__table_pqb_cjv_ddc__entry__1">注意事项</td><td class="- topic/entry entry colsep-0 rowsep-0" headers="id13__table_pqb_cjv_ddc__entry__2">- </td></tr></tbody></table></div>
<div class="table-container"><table class="- topic/table table frame-all" id="id13__table_qqb_cjv_ddc" data-ofbid="id13__table_qqb_cjv_ddc" 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"> 11</span><span class="table--title-label-punctuation">. </span></span><span class="table--title">hal_audio_set_playback_by_spk0</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="id13__table_qqb_cjv_ddc__entry__1">函数原型</th><th class="- topic/entry entry colsep-0 rowsep-1" id="id13__table_qqb_cjv_ddc__entry__2">void hal_audio_set_playback_by_spk0(aic_audio_ctrl
*codec)</th></tr></thead><tbody class="- topic/tbody tbody"><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="id13__table_qqb_cjv_ddc__entry__1">功能说明</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="id13__table_qqb_cjv_ddc__entry__2">配置 SPK0 音频通路</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="id13__table_qqb_cjv_ddc__entry__1">参数定义</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="id13__table_qqb_cjv_ddc__entry__2">
<div class="- topic/div div">codec：指向 aic_audio_ctrl 的指针</div>
</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="id13__table_qqb_cjv_ddc__entry__1">返回值</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="id13__table_qqb_cjv_ddc__entry__2">无</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-0" headers="id13__table_qqb_cjv_ddc__entry__1">注意事项</td><td class="- topic/entry entry colsep-0 rowsep-0" headers="id13__table_qqb_cjv_ddc__entry__2">-</td></tr></tbody></table></div>
<div class="table-container"><table class="- topic/table table frame-all" id="id13__table_rqb_cjv_ddc" data-ofbid="id13__table_rqb_cjv_ddc" 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"> 12</span><span class="table--title-label-punctuation">. </span></span><span class="table--title">hal_audio_set_playback_by_spk1</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="id13__table_rqb_cjv_ddc__entry__1">函数原型</th><th class="- topic/entry entry colsep-0 rowsep-1" id="id13__table_rqb_cjv_ddc__entry__2">void hal_audio_set_playback_by_spk1(aic_audio_ctrl
*codec)</th></tr></thead><tbody class="- topic/tbody tbody"><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="id13__table_rqb_cjv_ddc__entry__1">功能说明</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="id13__table_rqb_cjv_ddc__entry__2">配置 SPK1 音频通路</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="id13__table_rqb_cjv_ddc__entry__1">参数定义</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="id13__table_rqb_cjv_ddc__entry__2">codec：指向 aic_audio_ctrl 的指针</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="id13__table_rqb_cjv_ddc__entry__1">返回值</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="id13__table_rqb_cjv_ddc__entry__2">无</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-0" headers="id13__table_rqb_cjv_ddc__entry__1">注意事项</td><td class="- topic/entry entry colsep-0 rowsep-0" headers="id13__table_rqb_cjv_ddc__entry__2">-</td></tr></tbody></table></div>
<div class="table-container"><table class="- topic/table table frame-all" id="id13__table_sqb_cjv_ddc" data-ofbid="id13__table_sqb_cjv_ddc" 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"> 13</span><span class="table--title-label-punctuation">. </span></span><span class="table--title">hal_audio_playback_start</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="id13__table_sqb_cjv_ddc__entry__1">函数原型</th><th class="- topic/entry entry colsep-0 rowsep-1" id="id13__table_sqb_cjv_ddc__entry__2">void hal_audio_playback_start(aic_audio_ctrl
*codec)</th></tr></thead><tbody class="- topic/tbody tbody"><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="id13__table_sqb_cjv_ddc__entry__1">功能说明</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="id13__table_sqb_cjv_ddc__entry__2">开始播放</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="id13__table_sqb_cjv_ddc__entry__1">参数定义</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="id13__table_sqb_cjv_ddc__entry__2">
<div class="- topic/div div">codec：指向 aic_audio_ctrl 的指针</div>
</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="id13__table_sqb_cjv_ddc__entry__1">返回值</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="id13__table_sqb_cjv_ddc__entry__2">无</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-0" headers="id13__table_sqb_cjv_ddc__entry__1">注意事项</td><td class="- topic/entry entry colsep-0 rowsep-0" headers="id13__table_sqb_cjv_ddc__entry__2">-</td></tr></tbody></table></div>
<div class="table-container"><table class="- topic/table table frame-all" id="id13__table_tqb_cjv_ddc" data-ofbid="id13__table_tqb_cjv_ddc" 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"> 14</span><span class="table--title-label-punctuation">. </span></span><span class="table--title">hal_audio_playback_stop</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="id13__table_tqb_cjv_ddc__entry__1">函数原型</th><th class="- topic/entry entry colsep-0 rowsep-1" id="id13__table_tqb_cjv_ddc__entry__2">void hal_audio_playback_stop(aic_audio_ctrl
*codec)</th></tr></thead><tbody class="- topic/tbody tbody"><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="id13__table_tqb_cjv_ddc__entry__1">功能说明</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="id13__table_tqb_cjv_ddc__entry__2">结束播放</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="id13__table_tqb_cjv_ddc__entry__1">参数定义</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="id13__table_tqb_cjv_ddc__entry__2">
<div class="- topic/div div">
<div class="- topic/div div"> codec：指向 aic_audio_ctrl 的指针</div>
</div>
</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-1" headers="id13__table_tqb_cjv_ddc__entry__1">返回值</td><td class="- topic/entry entry colsep-0 rowsep-1" headers="id13__table_tqb_cjv_ddc__entry__2">无</td></tr><tr class="- topic/row"><td class="- topic/entry entry colsep-1 rowsep-0" headers="id13__table_tqb_cjv_ddc__entry__1">注意事项</td><td class="- topic/entry entry colsep-0 rowsep-0" headers="id13__table_tqb_cjv_ddc__entry__2">-</td></tr></tbody></table></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_j4p_djv_ddc" data-tocid="id__section_j4p_djv_ddc">源码说明</a></div></li><li class="section-item"><div class="section-title"><a href="#id__section_cvz_gjv_ddc" data-tocid="id__section_cvz_gjv_ddc">RT-Thread
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