qcom audio mixer_paths.xml音频通路配置

2023-10-16 22:17:28

mixer_paths.xml 作用

音频通路配置

在qcom平台上， DSP 连接着 FE, 和 BE;

其中 FE对应着一个 PCM设备，可以看做是一个usecase；

其中 BE对应着一个DAI, DAI连接着具体的audio device；

FE最终所对应audio device有很多个可选，具体的对应关系需要通过配置音频通路来配置；

简单理解：连接usecase 和 device 并打开该通路上的控件；

同时mixer_paths.xml 还提供mixer 各个控件的初始化配置；

mixer ctrl 初始化

    <!-- These are the initial mixer settings -->
    <ctl name="Voice Rx Device Mute" id="0" value="0" />
    <ctl name="Voice Rx Device Mute" id="1" value="-1" />
    <ctl name="Voice Rx Device Mute" id="2" value="20" />
    <ctl name="Voice Tx Mute" id="0" value="0" />
    <ctl name="Voice Tx Mute" id="1" value="-1" />
    <ctl name="Voice Tx Mute" id="2" value="500" />
    <ctl name="Voice Rx Gain" id="0" value="0" />
    <ctl name="Voice Rx Gain" id="1" value="-1" />
    <ctl name="Voice Rx Gain" id="2" value="20" />
    <ctl name="Voip Tx Mute" id="0" value="0" />
    <ctl name="Voip Tx Mute" id="1" value="500" />
    <ctl name="Voip Rx Gain" id="0" value="0" />
    <ctl name="Voip Rx Gain" id="1" value="20" />
    <ctl name="Voip Mode Config" value="12" />
    <ctl name="Voip Rate Config" value="0" />
    <ctl name="Voip Evrc Min Max Rate Config" id="0" value="1" />
    <ctl name="Voip Evrc Min Max Rate Config" id="1" value="4" />
    <ctl name="Voip Dtx Mode" value="0" />
    <ctl name="TTY Mode" value="OFF" />
    <ctl name="INT4_MI2S_RX Port Mixer INT3_MI2S_TX" value="0" />
    <ctl name="SLIMBUS_7_RX Audio Mixer MultiMedia1" value="0" />
    ......

    <ctl name="TERT_MI2S_RX Audio Mixer MultiMedia1" value="0" />
    <ctl name="TERT_MI2S_RX Audio Mixer MultiMedia2" value="0" />
    <ctl name="TERT_MI2S_RX Audio Mixer MultiMedia3" value="0" />
    ......

    <ctl name="DISPLAY_PORT Mixer MultiMedia1" value="0" />
    <ctl name="DISPLAY_PORT Mixer MultiMedia2" value="0" />
    <ctl name="DISPLAY_PORT Mixer MultiMedia3" value="0" />
    ......
    <ctl name="Display Port RX Channels" value="Two" />
    <ctl name="INT4_MI2S_RX Audio Mixer MultiMedia1" value="0" />
    <ctl name="INT0_MI2S_RX Audio Mixer MultiMedia1" value="0" />
    <ctl name="INT4_MI2S_RX Audio Mixer MultiMedia2" value="0" />
    ......
	<ctl name="PRI_MI2S_RX Audio Mixer MultiMedia1" value="0" />
    <ctl name="USB_AUDIO_RX Audio Mixer MultiMedia1" value="0" />
    <ctl name="USB_AUDIO_RX Audio Mixer MultiMedia2" value="0" />
    ......
    <ctl name="USB_AUDIO_RX Format" value="S16_LE" />
    <ctl name="USB_AUDIO_RX SampleRate" value="KHZ_48" />
    <ctl name="USB_AUDIO_RX Channels" value="Two" />
    ......
    <!-- HFP start -->
    <ctl name="HFP_SLIM7_UL_HL Switch" value="0" />
    <ctl name="INT4_MI2S_RX Port Mixer SLIM_7_TX" value="0" />
    <ctl name="INT0_MI2S_RX Port Mixer SLIM_7_TX" value="0" />
    <!-- HFP end -->
    <!-- echo reference -->
    <ctl name="AUDIO_REF_EC_UL1 MUX" value="None" />
    <!-- usb headset -->
    <ctl name="AFE_PCM_RX Audio Mixer MultiMedia1" value="0" />
    ......
    <!-- fm -->
    <ctl name="SLIMBUS_8 LOOPBACK Volume" value="0" />
    <ctl name="INT4_MI2S_RX Port Mixer SLIM_8_TX" value="0" />
    ......

    <!-- Multimode Voice1 -->
    <ctl name="INT4_MI2S_RX_Voice Mixer VoiceMMode1" value="0" />
    <ctl name="INT0_MI2S_RX_Voice Mixer VoiceMMode1" value="0" />
    <ctl name="VoiceMMode1_Tx Mixer INT3_MI2S_TX_MMode1" value="0" />
    <!-- Multimode Voice1 HDMI -->
    <ctl name="HDMI_RX_Voice Mixer VoiceMMode1" value="0" />
    <!-- Multimode Voice1 BTSCO -->
    <ctl name="SLIM_7_RX_Voice Mixer VoiceMMode1" value="0" />
    <ctl name="VoiceMMode1_Tx Mixer SLIM_7_TX_MMode1" value="0" />
    <!-- Multimode Voice1 USB headset -->
    <ctl name="AFE_PCM_RX_Voice Mixer VoiceMMode1" value="0" />
    <ctl name="VoiceMMode1_Tx Mixer AFE_PCM_TX_MMode1" value="0" />
    <ctl name="USB_AUDIO_RX_Voice Mixer VoiceMMode1" value="0" />
    <ctl name="VoiceMMode1_Tx Mixer USB_AUDIO_TX_MMode1" value="0" />
    <!-- Miltimode Voice1 end-->

    <!-- Multimode Voice2 -->
    <ctl name="INT4_MI2S_RX_Voice Mixer VoiceMMode2" value="0" />
    ......
    <!-- Multimode Voice2 HDMI -->
    <ctl name="HDMI_RX_Voice Mixer VoiceMMode2" value="0" />
    ......
    <!-- Multimode Voice2 end-->

    <!-- Voice external ec. reference -->
    <ctl name="VOC_EXT_EC MUX" value="NONE" />
    <!-- Voice external ec. reference end -->

    <!-- RT Proxy Cal -->
    <ctl name="RT_PROXY_1_RX SetCalMode" value="CAL_MODE_NONE" />
    <ctl name="RT_PROXY_1_TX SetCalMode" value="CAL_MODE_NONE" />
    <!-- RT Proxy Cal end -->
    <!-- mixer control to disable lowlatency qos voting -->
    <ctl name="MultiMedia5_RX QOS Vote" value="Disable" />
    <!-- mixer control to disable lowlatency qos voting end -->

    <!-- Incall Recording -->
    <ctl name="MultiMedia1 Mixer VOC_REC_UL" value="0" />
    ......
    <!-- Incall Recording End -->

    <!-- Incall Music -->
    <ctl name="Incall_Music Audio Mixer MultiMedia2" value="0" />
    <!-- Incall Music End -->
    ......

    <!-- Codec controls -->
    <!-- WSA controls -->
    <ctl name="SpkrLeft COMP Switch" value="0" />
    <ctl name="SpkrRight COMP Switch" value="0" />
    <ctl name="SpkrLeft BOOST Switch" value="0" />
    <ctl name="SpkrRight BOOST Switch" value="0" />
    <ctl name="SpkrLeft VISENSE Switch" value="0" />
    <ctl name="SpkrRight VISENSE Switch" value="0" />
    <ctl name="SpkrLeft SWR DAC_Port Switch" value="0" />
    <ctl name="SpkrRight SWR DAC_Port Switch" value="0" />
    <ctl name="SpkrLeft WSA PA Gain" value="G_0_DB" />
    <ctl name="SpkrRight WSA PA Gain" value="G_0_DB" />
    <ctl name="SpkrLeft WSA PA Mute" value="1" />
    <ctl name="SpkrRight WSA PA Mute" value="1" />
    <ctl name="EAR SPKR PA Gain" value="G_DEFAULT" />

    <!-- Volume controls -->
    <ctl name="HPHL Volume" value="9" />
    <ctl name="HPHR Volume" value="9" />
    <ctl name="EAR PA Gain" value="POS_1P5_DB" />
    <ctl name="EAR PA Boost" value="ENABLE" />

    <ctl name="RX1 Digital Volume" value="84" />
    <ctl name="RX2 Digital Volume" value="84" />
    <ctl name="RX3 Digital Volume" value="84" />
    <ctl name="RX4 Digital Volume" value="84" />
    <ctl name="RX5 Digital Volume" value="84" />
    <ctl name="ADC1 Volume" value="4" />
    <ctl name="ADC2 Volume" value="4" />
    <ctl name="ADC3 Volume" value="14" />
    <ctl name="DEC1 Volume" value="84" />
    <ctl name="DEC2 Volume" value="84" />
    <ctl name="DEC3 Volume" value="84" />
    <ctl name="DEC4 Volume" value="84" />

    <!-- Compander controls -->
    <ctl name="COMP1 Switch" value="1" />
    <ctl name="COMP2 Switch" value="1" />

    <!-- MUX controls -->
    <ctl name="DEC1 MUX" value="ZERO" />
    <ctl name="DEC2 MUX" value="ZERO" />
    <ctl name="DEC3 MUX" value="ZERO" />
    <ctl name="DEC4 MUX" value="ZERO" />
    <ctl name="ADC2 MUX" value="ZERO" />
    <ctl name="RDAC2 MUX" value="ZERO" />

    <!-- Interpolator chain controls -->
	<!-- ADD RX Chain Controls --> 

    <ctl name="RX1 MIX1 INP1" value="ZERO" />
    <ctl name="RX2 MIX1 INP1" value="ZERO" />
    <ctl name="RDAC2 MUX" value="ZERO" />
    <ctl name="HPHL" value="ZERO" />
    <ctl name="HPHR" value="ZERO" />
    <ctl name="RX1 MIX2 INP1" value="ZERO" />
    <ctl name="RX2 MIX2 INP1" value="ZERO" />
    <ctl name="RX3 MIX1 INP1" value="ZERO" />
    <ctl name="RX4 MIX1 INP1" value="ZERO" />
    <ctl name="RX5 MIX1 INP1" value="ZERO" />
    <ctl name="RX HPH Mode" value="NORMAL" />
    <ctl name="COMP0 RX1" value="0" />
    <ctl name="COMP0 RX2" value="0" />

    <!-- IIR/voice anc -->
    <ctl name="IIR1 Band1" id ="0" value="268435456" />
    <ctl name="IIR1 Band1" id ="1" value="0" />
      ......

audio route

mixer_pahts.xml 中根据usecase设置ctl控件，以deep-buffer-playback 为例：

   <path name="deep-buffer-playback speaker">
        <ctl name="QUAT_MI2S_RX Audio Mixer MultiMedia1" value="1" />
    </path>

    <path name="deep-buffer-playback headphones">
        <ctl name="TERT_MI2S_RX Audio Mixer MultiMedia1" value="1" />
    </path>

    <path name="deep-buffer-playback earphones">
        <ctl name="QUAT_MI2S_RX Audio Mixer MultiMedia1" value="1" />
    </path>

这些通路其实就是连接 usecase、device 之间的路由。比如 “deep-buffer-playback speaker” 是连接 deep-buffer-playback FE PCM、speaker Device 之间的路由，打开 “deep-buffer-playback speaker”，则把 deep-buffer-playback FE PCM 和 speaker Device 连接起来；关闭 “deep-buffer-playback speaker”，则断开 deep-buffer-playback FE PCM 和 speaker Device 的连接。

路由控件名称一般是： $BE_DAI Audio Mixer $FE_PCM，录制类型的路由控件名称一般是：$FE_PCM Audio Mixer $BE_DAI，这很容易分辨。

deep-buffer-playback 连接 speaker

例如 “deep-buffer-playback speaker” 通路中的路由控件：

<ctl name="QUAT_MI2S_RX Audio Mixer MultiMedia1" value="1" />

MultiMedia1：deep_buffer usacase 对应的 FE PCM
QUAT_MI2S_RX：speaker device 所连接的 BE DAI
Audio Mixer：表示 DSP 路由功能
value：1 表示连接，0 表示断开连接

为了使得声音从 speaker 端点输出，需要打开 AIF1、DAC1、SPKOUT 这些部件，并把它们串联起来，这样音频数据才能顺着这条路径（AIF1>DAC1>SPKOUT>SPEAKER）一路输出到 speaker。

mixer_pahts.xml 中看 speaker 通路的通路配置：

   <path name="speaker">
        <ctl name="SPKL DAC1 Switch" value="1" />
        <ctl name="DAC1L AIF1RX1 Switch" value="1" />
        <ctl name="DAC1R AIF1RX2 Switch" value="1" />
    </path>

码农公寓

mixer_paths.xml 作用

mixer ctrl 初始化

audio route

deep-buffer-playback 连接 speaker

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