C 以编程方式在Linux上查找可用声卡
有没有办法使用asoundlib和C以编程方式获取系统上可用声卡的列表?我希望它具有与C 以编程方式在Linux上查找可用声卡,c,linux,alsa,C,Linux,Alsa,有没有办法使用asoundlib和C以编程方式获取系统上可用声卡的列表?我希望它具有与/proc/asound/cards相同的信息。您可以使用snd\u card\u next对这些卡进行迭代,从-1开始获得第0张卡 下面是示例代码;用gcc-o countcards countcards.c-lasound编译它: #include <alsa/asoundlib.h> #include <stdio.h> int main() { int totalCar
/proc/asound/cards
相同的信息。您可以使用snd\u card\u next
对这些卡进行迭代,从-1开始获得第0张卡
下面是示例代码;用gcc-o countcards countcards.c-lasound编译它:
#include <alsa/asoundlib.h>
#include <stdio.h>
int main()
{
int totalCards = 0; // No cards found yet
int cardNum = -1; // Start with first card
int err;
for (;;) {
// Get next sound card's card number.
if ((err = snd_card_next(&cardNum)) < 0) {
fprintf(stderr, "Can't get the next card number: %s\n",
snd_strerror(err));
break;
}
if (cardNum < 0)
// No more cards
break;
++totalCards; // Another card found, so bump the count
}
printf("ALSA found %i card(s)\n", totalCards);
// ALSA allocates some memory to load its config file when we call
// snd_card_next. Now that we're done getting the info, tell ALSA
// to unload the info and release the memory.
snd_config_update_free_global();
}
#include(这也会打开每张卡以读取其名称)