From e0da0f1f8075c439308ef74cd01c450c53fe09d7 Mon Sep 17 00:00:00 2001
From: linbo <1034003879@qq.com>
Date: Tue, 25 Aug 2026 13:54:41 +0800
Subject: [PATCH] fix(microphone): list usable ALSA capture endpoints

---
 .../src/microphone_device_discovery.cpp            | 14 +++++++++++++-
 1 file changed, 13 insertions(+), 1 deletion(-)

diff --git a/cmvr-es/devices/microphone/ffmpeg_microphone/src/microphone_device_discovery.cpp b/cmvr-es/devices/microphone/ffmpeg_microphone/src/microphone_device_discovery.cpp
index 99fa3adc..df7f9e7b 100644
--- a/cmvr-es/devices/microphone/ffmpeg_microphone/src/microphone_device_discovery.cpp
+++ b/cmvr-es/devices/microphone/ffmpeg_microphone/src/microphone_device_discovery.cpp
@@ -2,6 +2,7 @@
 
 #include <memory>
 #include <stdexcept>
+#include <string_view>
 #include <utility>
 
 extern "C" {
@@ -26,6 +27,17 @@ struct DeviceListDeleter {
     }
 };
 
+bool isFfmpegCaptureEndpoint(const char* device_name)
+{
+    constexpr std::string_view kPlugHardwarePrefix = "plughw:";
+    if (!device_name) {
+        return false;
+    }
+
+    const std::string_view name(device_name);
+    return name.compare(0, kPlugHardwarePrefix.size(), kPlugHardwarePrefix) == 0;
+}
+
 }  // namespace
 
 std::vector<MicrophoneInputDeviceInfo> listAvailableMicrophoneInputDevices()
@@ -55,7 +67,7 @@ std::vector<MicrophoneInputDeviceInfo> listAvailableMicrophoneInputDevices()
 
     for (int index = 0; index < device_list->nb_devices; ++index) {
         const AVDeviceInfo* source = device_list->devices[index];
-        if (!source || !source->device_name || source->device_name[0] == '\0') {
+        if (!source || !isFfmpegCaptureEndpoint(source->device_name)) {
             continue;
         }