首先，大家好！
我的名字是 Przemek Gajos，这是我在这里发表的第一篇文章。
我最近为我的音频采集卡编写了 ALSA 驱动程序，但 PULSEAUDIO 将其识别为采集源时遇到问题。
以下是一些事实，希望你们中的一个人过去经历过这种情况并且能够提供帮助：
(1) 采集卡有 2 个音频输入（立体声）：1 个 HDMI 和 1 个模拟。直接使用 ALSA 时我可以捕获两者的声音。
(2)当我使用PULSEAUDIO命令列出音频捕获源时：
$ pactl list | grep -A2 'Source #' | grep 'Name: ' | cut -d" " -f2
输出显示以下内容，这些是板载设备，不使用我的 ALSA 驱动程序：
alsa_output.pci-0000_00_1b.0.analog-stereo.monitor
alsa_input.pci-0000_00_1b.0.analog-stereo
因此，从上面可以看出，我的设备没有被列为捕获源。
（3）当我使用：
$ pactl list
输出显示“我的”ALSA 卡。请参阅下面的 2 个示例输出：(a) 对于板载卡（不使用我的驱动程序）和 (b) 对于使用我的驱动程序的卡：
(a) 机上卡：
Card #0
Name: alsa_card.pci-0000_00_1b.0
Driver: module-alsa-card.c
Owner Module: 4
Properties:
alsa.card = "10"
alsa.card_name = "HDA Intel PCH"
alsa.long_card_name = "HDA Intel PCH at 0xfbf20000 irq 67"
alsa.driver_name = "snd_hda_intel"
device.bus_path = "pci-0000:00:1b.0"
sysfs.path = "/devices/pci0000:00/0000:00:1b.0/sound/card10"
device.bus = "pci"
device.vendor.id = "8086"
device.vendor.name = "Intel Corporation"
device.product.name = "6 Series/C200 Series Chipset Family High Definition Audio Controller"
device.form_factor = "internal"
device.string = "10"
device.description = "Built-in Audio"
module-udev-detect.discovered = "1"
device.icon_name = "audio-card-pci"
Profiles:
output:analog-stereo: Analogue Stereo Output (sinks: 1, sources: 0, priority. 6000)
output:analog-stereo+input:analog-stereo: Analogue Stereo Duplex (sinks: 1, sources: 1, priority. 6060)
output:analog-surround-40: Analogue Surround 4.0 Output (sinks: 1, sources: 0, priority. 700)
output:analog-surround-40+input:analog-stereo: Analogue Surround 4.0 Output + Analogue Stereo Input (sinks: 1, sources: 1, priority. 760)
output:analog-surround-41: Analogue Surround 4.1 Output (sinks: 1, sources: 0, priority. 800)
output:analog-surround-41+input:analog-stereo: Analogue Surround 4.1 Output + Analogue Stereo Input (sinks: 1, sources: 1, priority. 860)
output:analog-surround-50: Analogue Surround 5.0 Output (sinks: 1, sources: 0, priority. 700)
output:analog-surround-50+input:analog-stereo: Analogue Surround 5.0 Output + Analogue Stereo Input (sinks: 1, sources: 1, priority. 760)
output:analog-surround-51: Analogue Surround 5.1 Output (sinks: 1, sources: 0, priority. 800)
output:analog-surround-51+input:analog-stereo: Analogue Surround 5.1 Output + Analogue Stereo Input (sinks: 1, sources: 1, priority. 860)
input:analog-stereo: Analogue Stereo Input (sinks: 0, sources: 1, priority. 60)
off: Off (sinks: 0, sources: 0, priority. 0)
Active Profile: output:analog-stereo+input:analog-stereo
Ports:
analog-output: Analogue Output (priority 9900)
Part of profile(s): output:analog-stereo, output:analog-stereo+input:analog-stereo, output:analog-surround-40, output:analog-surround-40+input:analog-stereo, output:analog-surround-41, output:analog-surround-41+input:analog-stereo, output:analog-surround-50, output:analog-surround-50+input:analog-stereo, output:analog-surround-51, output:analog-surround-51+input:analog-stereo
analog-input-microphone: Microphone (priority 8700)
Part of profile(s): output:analog-stereo+input:analog-stereo, output:analog-surround-40+input:analog-stereo, output:analog-surround-41+input:analog-stereo, output:analog-surround-50+input:analog-stereo, output:analog-surround-51+input:analog-stereo, input:analog-stereo
analog-input-linein: Line In (priority 8100)
Part of profile(s): output:analog-stereo+input:analog-stereo, output:analog-surround-40+input:analog-stereo, output:analog-surround-41+input:analog-stereo, output:analog-surround-50+input:analog-stereo, output:analog-surround-51+input:analog-stereo, input:analog-stereo
(b) 我的一张卡（我有超过 1 张卡）：
Card #11
Name: alsa_card.1
Driver: module-alsa-card.c
Owner Module: 31
Properties:
alsa.card = "1"
alsa.card_name = "OEM_VISIONRGB_AV"
alsa.long_card_name = "OEM_VISIONRGB_AV Analog DGC dada"
device.bus_path = "/devices/virtual/sound/card1"
sysfs.path = "/devices/virtual/sound/card1"
device.string = "1"
device.description = "OEM_VISIONRGB_AV"
module-udev-detect.discovered = "1"
device.icon_name = "audio-card"
Profiles:
input:analog-stereo: Analogue Stereo Input (sinks: 0, sources: 1, priority. 60)
off: Off (sinks: 0, sources: 0, priority. 0)
Active Profile: input:analog-stereo
Ports:
analog-input: Analogue Input (priority 10000)
Part of profile(s): input:analog-stereo
请注意，我的卡和机上卡的“名称”字段的形式有很大不同。我测试过：
从 alsa_card.pci-0000_00_1b.0（板载卡）捕获可以正常工作。
它无法从 alsa_card.1（我的卡）捕获。
请注意，我的 ALSA 驱动程序仍然缺少一些元素，例如，未包含混音器元素，我认为这可能是 ALSA 和 PULSEAUDIO 之间缺乏合作的原因。根据您的经验，您是否知道 PULSEAUDIO 是否需要混合器元素才能将 ALSA 设备限定为捕获源。
对于这条冗长的消息，我深表歉意。尽管如此，以上内容是否引起了人们的注意？
非常感谢您的帮助和建议，
普热梅克