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<div class=" wh_topic_content body "><main role="main"><article class="- topic/topic concept/concept topic concept" role="article" aria-labelledby="ariaid-title1">
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<span class="edit-link" style="font-size:12px; opacity:0.6; text-align:right; vertical-align:middle"><a target="_blank" title="Edit this document" href="http://172.16.35.88/tasks/jdssno1uvvbf2mltu9kb9v3if05d5gopuakboe8hlud18rma/edit/F:/aicdita/aicdita-cn/topics/sdk/audio_codec/audio-codec-interface_design.dita">Edit online</a></span><h1 class="- topic/title title topictitle1" id="ariaid-title1">接口设计</h1>
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<div class="date inPage">15 Jan 2024</div><div style="color: gray;">
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Read time: 1 minute(s)
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</div>
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<div class="- topic/body concept/conbody body conbody">
|
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|
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<div class="table-container"><table class="- topic/table table frame-all" id="audio_codec_interface_design__table_m4k_z1n_d1c" data-ofbid="audio_codec_interface_design__table_m4k_z1n_d1c" 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">aic_codec_trigger</span></caption><colgroup><col style="width:25%"/><col style="width:75%"/></colgroup><thead class="- topic/thead thead">
|
||
<tr class="- topic/row">
|
||
<th class="- topic/entry entry colsep-1 rowsep-1" id="audio_codec_interface_design__table_m4k_z1n_d1c__entry__1">函数原型</th>
|
||
<th class="- topic/entry entry colsep-0 rowsep-1" id="audio_codec_interface_design__table_m4k_z1n_d1c__entry__2">static int aic_codec_trigger(struct snd_pcm_substream *substream,
|
||
int cmd, struct snd_soc_dai *dai)</th>
|
||
</tr>
|
||
</thead><tbody class="- topic/tbody tbody">
|
||
<tr class="- topic/row">
|
||
<td class="- topic/entry entry colsep-1 rowsep-1" headers="audio_codec_interface_design__table_m4k_z1n_d1c__entry__1">功能说明</td>
|
||
<td class="- topic/entry entry colsep-0 rowsep-1" headers="audio_codec_interface_design__table_m4k_z1n_d1c__entry__2">AudioCodec 的触发函数，根据 cmd 执行不同的操作</td>
|
||
</tr>
|
||
<tr class="- topic/row">
|
||
<td class="- topic/entry entry colsep-1 rowsep-1" headers="audio_codec_interface_design__table_m4k_z1n_d1c__entry__1">参数定义</td>
|
||
<td class="- topic/entry entry colsep-0 rowsep-1" headers="audio_codec_interface_design__table_m4k_z1n_d1c__entry__2">substream：指向需要执行 cmd 的 substreamcmd：需要执行的操作 dai：unused</td>
|
||
</tr>
|
||
<tr class="- topic/row">
|
||
<td class="- topic/entry entry colsep-1 rowsep-1" headers="audio_codec_interface_design__table_m4k_z1n_d1c__entry__1">返回值</td>
|
||
<td class="- topic/entry entry colsep-0 rowsep-1" headers="audio_codec_interface_design__table_m4k_z1n_d1c__entry__2">0：执行成功-EINVAL：参数非法</td>
|
||
</tr>
|
||
<tr class="- topic/row">
|
||
<td class="- topic/entry entry colsep-1 rowsep-0" headers="audio_codec_interface_design__table_m4k_z1n_d1c__entry__1">注意事项</td>
|
||
<td class="- topic/entry entry colsep-0 rowsep-0" headers="audio_codec_interface_design__table_m4k_z1n_d1c__entry__2">可以传递的 cmd 参数有：<ul class="- topic/ul ul" id="audio_codec_interface_design__ul_elh_jbh_ybc" data-ofbid="audio_codec_interface_design__ul_elh_jbh_ybc">
|
||
<li class="- topic/li li" data-ofbid="d183195e94__20250123155219">SNDRV_PCM_TRIGGER_START</li>
|
||
<li class="- topic/li li" data-ofbid="d183195e97__20250123155219">SNDRV_PCM_TRIGGER_RESUME</li>
|
||
<li class="- topic/li li" data-ofbid="d183195e100__20250123155219">SNDRV_PCM_TRIGGER_PAUSE_RELEASE</li>
|
||
<li class="- topic/li li" data-ofbid="d183195e103__20250123155219">SNDRV_PCM_TRIGGER_STOPSNDRV_PCM_TRIGGER_SUSPENDSNDRV_PCM_TRIGGER_PAUSE_PUSH</li>
|
||
</ul></td>
|
||
</tr>
|
||
</tbody></table></div>
|
||
<div class="table-container"><table class="- topic/table table frame-all" id="audio_codec_interface_design__table_n4k_z1n_d1c" data-ofbid="audio_codec_interface_design__table_n4k_z1n_d1c" 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">aic_codec_get_mod_freq</span></caption><colgroup><col style="width:25%"/><col style="width:75%"/></colgroup><thead class="- topic/thead thead">
|
||
<tr class="- topic/row">
|
||
<th class="- topic/entry entry colsep-1 rowsep-1" id="audio_codec_interface_design__table_n4k_z1n_d1c__entry__1">函数原型</th>
|
||
<th class="- topic/entry entry colsep-0 rowsep-1" id="audio_codec_interface_design__table_n4k_z1n_d1c__entry__2">static unsigned int aic_codec_get_mod_freq(struct aic_codec
|
||
*codec, struct snd_pcm_hw_params *params)</th>
|
||
</tr>
|
||
</thead><tbody class="- topic/tbody tbody">
|
||
<tr class="- topic/row">
|
||
<td class="- topic/entry entry colsep-1 rowsep-1" headers="audio_codec_interface_design__table_n4k_z1n_d1c__entry__1">功能说明</td>
|
||
<td class="- topic/entry entry colsep-0 rowsep-1" headers="audio_codec_interface_design__table_n4k_z1n_d1c__entry__2">根据传入的参数 params，获取需要设置的 AudioCodec 模块的时钟频率</td>
|
||
</tr>
|
||
<tr class="- topic/row">
|
||
<td class="- topic/entry entry colsep-1 rowsep-1" headers="audio_codec_interface_design__table_n4k_z1n_d1c__entry__1">参数定义</td>
|
||
<td class="- topic/entry entry colsep-0 rowsep-1" headers="audio_codec_interface_design__table_n4k_z1n_d1c__entry__2">codec：指向 codec 的指针 params：传入的硬件参数指针</td>
|
||
</tr>
|
||
<tr class="- topic/row">
|
||
<td class="- topic/entry entry colsep-1 rowsep-1" headers="audio_codec_interface_design__table_n4k_z1n_d1c__entry__1">返回值</td>
|
||
<td class="- topic/entry entry colsep-0 rowsep-1" headers="audio_codec_interface_design__table_n4k_z1n_d1c__entry__2">执行成功返回需要设置的 codec 时钟频率，否则返回 0</td>
|
||
</tr>
|
||
<tr class="- topic/row">
|
||
<td class="- topic/entry entry colsep-1 rowsep-0" headers="audio_codec_interface_design__table_n4k_z1n_d1c__entry__1">注意事项</td>
|
||
<td class="- topic/entry entry colsep-0 rowsep-0" headers="audio_codec_interface_design__table_n4k_z1n_d1c__entry__2">-</td>
|
||
</tr>
|
||
</tbody></table></div>
|
||
<div class="table-container"><table class="- topic/table table frame-all" id="audio_codec_interface_design__table_o4k_z1n_d1c" data-ofbid="audio_codec_interface_design__table_o4k_z1n_d1c" 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">aic_codec_hw_params</span></caption><colgroup><col style="width:25%"/><col style="width:75%"/></colgroup><thead class="- topic/thead thead">
|
||
<tr class="- topic/row">
|
||
<th class="- topic/entry entry colsep-1 rowsep-1" id="audio_codec_interface_design__table_o4k_z1n_d1c__entry__1">函数原型</th>
|
||
<th class="- topic/entry entry colsep-0 rowsep-1" id="audio_codec_interface_design__table_o4k_z1n_d1c__entry__2">static int aic_codec_hw_params(struct snd_pcm_substream
|
||
*substream, struct snd_pcm_hw_params *params, struct snd_soc_dai
|
||
*dai)</th>
|
||
</tr>
|
||
</thead><tbody class="- topic/tbody tbody">
|
||
<tr class="- topic/row">
|
||
<td class="- topic/entry entry colsep-1 rowsep-1" headers="audio_codec_interface_design__table_o4k_z1n_d1c__entry__1">功能说明</td>
|
||
<td class="- topic/entry entry colsep-0 rowsep-1" headers="audio_codec_interface_design__table_o4k_z1n_d1c__entry__2">根据传入的 params 参数，设置 codec 模块的时钟及采样率</td>
|
||
</tr>
|
||
<tr class="- topic/row">
|
||
<td class="- topic/entry entry colsep-1 rowsep-1" headers="audio_codec_interface_design__table_o4k_z1n_d1c__entry__1">参数定义</td>
|
||
<td class="- topic/entry entry colsep-0 rowsep-1" headers="audio_codec_interface_design__table_o4k_z1n_d1c__entry__2">substream：指向需要设置的 subtsreamparams：需要设置的硬件参数 dai：unused</td>
|
||
</tr>
|
||
<tr class="- topic/row">
|
||
<td class="- topic/entry entry colsep-1 rowsep-1" headers="audio_codec_interface_design__table_o4k_z1n_d1c__entry__1">返回值</td>
|
||
<td class="- topic/entry entry colsep-0 rowsep-1" headers="audio_codec_interface_design__table_o4k_z1n_d1c__entry__2">0：执行成功-EINVAL：参数非法</td>
|
||
</tr>
|
||
<tr class="- topic/row">
|
||
<td class="- topic/entry entry colsep-1 rowsep-0" headers="audio_codec_interface_design__table_o4k_z1n_d1c__entry__1">注意事项</td>
|
||
<td class="- topic/entry entry colsep-0 rowsep-0" headers="audio_codec_interface_design__table_o4k_z1n_d1c__entry__2">-</td>
|
||
</tr>
|
||
</tbody></table></div>
|
||
<div class="table-container"><table class="- topic/table table frame-all" id="audio_codec_interface_design__table_p4k_z1n_d1c" data-ofbid="audio_codec_interface_design__table_p4k_z1n_d1c" 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">aic_codec_startup</span></caption><colgroup><col style="width:25%"/><col style="width:75%"/></colgroup><thead class="- topic/thead thead">
|
||
<tr class="- topic/row">
|
||
<th class="- topic/entry entry colsep-1 rowsep-1" id="audio_codec_interface_design__table_p4k_z1n_d1c__entry__1">函数原型</th>
|
||
<th class="- topic/entry entry colsep-0 rowsep-1" id="audio_codec_interface_design__table_p4k_z1n_d1c__entry__2">static int aic_codec_startup(struct snd_pcm_substream *substream,
|
||
struct snd_soc_dai *dai)</th>
|
||
</tr>
|
||
</thead><tbody class="- topic/tbody tbody">
|
||
<tr class="- topic/row">
|
||
<td class="- topic/entry entry colsep-1 rowsep-1" headers="audio_codec_interface_design__table_p4k_z1n_d1c__entry__1">功能说明</td>
|
||
<td class="- topic/entry entry colsep-0 rowsep-1" headers="audio_codec_interface_design__table_p4k_z1n_d1c__entry__2">AudioCodec 的 startup 函数，执行音频流 trigger 前需要设置的操作。 此处用于设置 period 和 dma
|
||
buffer 的对齐方式</td>
|
||
</tr>
|
||
<tr class="- topic/row">
|
||
<td class="- topic/entry entry colsep-1 rowsep-1" headers="audio_codec_interface_design__table_p4k_z1n_d1c__entry__1">参数定义</td>
|
||
<td class="- topic/entry entry colsep-0 rowsep-1" headers="audio_codec_interface_design__table_p4k_z1n_d1c__entry__2">substream：指向需要执行 startup 的 substreamdai：设置的 dai 指针</td>
|
||
</tr>
|
||
<tr class="- topic/row">
|
||
<td class="- topic/entry entry colsep-1 rowsep-0" headers="audio_codec_interface_design__table_p4k_z1n_d1c__entry__1">返回值</td>
|
||
<td class="- topic/entry entry colsep-0 rowsep-0" headers="audio_codec_interface_design__table_p4k_z1n_d1c__entry__2">0：执行成功-EINVAL：参数非法</td>
|
||
</tr>
|
||
</tbody></table></div>
|
||
<div class="table-container"><table class="- topic/table table frame-all" id="audio_codec_interface_design__table_q4k_z1n_d1c" data-ofbid="audio_codec_interface_design__table_q4k_z1n_d1c" 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">aic_codec_dai_probe</span></caption><colgroup><col style="width:25%"/><col style="width:75%"/></colgroup><thead class="- topic/thead thead">
|
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<tr class="- topic/row">
|
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<th class="- topic/entry entry colsep-1 rowsep-1" id="audio_codec_interface_design__table_q4k_z1n_d1c__entry__1">函数原型</th>
|
||
<th class="- topic/entry entry colsep-0 rowsep-1" id="audio_codec_interface_design__table_q4k_z1n_d1c__entry__2">static int aic_codec_dai_probe(struct snd_soc_dai *dai)</th>
|
||
</tr>
|
||
</thead><tbody class="- topic/tbody tbody">
|
||
<tr class="- topic/row">
|
||
<td class="- topic/entry entry colsep-1 rowsep-1" headers="audio_codec_interface_design__table_q4k_z1n_d1c__entry__1">功能原型</td>
|
||
<td class="- topic/entry entry colsep-0 rowsep-1" headers="audio_codec_interface_design__table_q4k_z1n_d1c__entry__2">执行 dma 的初始化操作</td>
|
||
</tr>
|
||
<tr class="- topic/row">
|
||
<td class="- topic/entry entry colsep-1 rowsep-1" headers="audio_codec_interface_design__table_q4k_z1n_d1c__entry__1">参数定义</td>
|
||
<td class="- topic/entry entry colsep-0 rowsep-1" headers="audio_codec_interface_design__table_q4k_z1n_d1c__entry__2">dai：指向 dai 的指针</td>
|
||
</tr>
|
||
<tr class="- topic/row">
|
||
<td class="- topic/entry entry colsep-1 rowsep-1" headers="audio_codec_interface_design__table_q4k_z1n_d1c__entry__1">返回值</td>
|
||
<td class="- topic/entry entry colsep-0 rowsep-1" headers="audio_codec_interface_design__table_q4k_z1n_d1c__entry__2">0：执行成功</td>
|
||
</tr>
|
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<tr class="- topic/row">
|
||
<td class="- topic/entry entry colsep-1 rowsep-0" headers="audio_codec_interface_design__table_q4k_z1n_d1c__entry__1">注意事项</td>
|
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<td class="- topic/entry entry colsep-0 rowsep-0" headers="audio_codec_interface_design__table_q4k_z1n_d1c__entry__2">-</td>
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