linux alsa 安装

sudo apt update
sudo apt install alsa-utils alsa-oss libasound2-dev

sudo yum install alsa-lib alsa-utils alsa-tools

sudo dnf install alsa-lib alsa-utils alsa-tools

#include <stdio.h>
#include <stdlib.h>
#include <alsa/asoundlib.h>

int main() {
    int err;
    snd_pcm_t *handle;
    snd_pcm_hw_params_t *params;
    unsigned int rate = 44100;
    int dir;
    char *buffer;
    int size, loops;

    /* Open PCM device for playback. */
    if ((err = snd_pcm_open(&handle, "default", SND_PCM_STREAM_PLAYBACK, 0)) < 0) {
        fprintf(stderr, "Cannot open audio device (%s)\n", snd_strerror(err));
        exit(1);
    }

    /* Allocate a hardware parameters object. */
    snd_pcm_hw_params_alloca(&params);

    /* Fill it in with default values. */
    snd_pcm_hw_params_any(handle, params);

    /* Set the desired hardware parameters. */
    snd_pcm_hw_params_set_access(handle, params, SND_PCM_ACCESS_RW_INTERLEAVED);
    snd_pcm_hw_params_set_format(handle, params, SND_PCM_FORMAT_S16_LE);
    snd_pcm_hw_params_set_rate_near(handle, params, &rate, &dir);
    snd_pcm_hw_params_set_channels(handle, params, 2);

    /* Apply the hardware parameters. */
    if ((err = snd_pcm_hw_params(handle, params)) < 0) {
        fprintf(stderr, "Cannot set hardware parameters (%s)\n", snd_strerror(err));
        exit(1);
    }

    /* Allocate buffer to hold single period. */
    snd_pcm_hw_params_get_period_size(params, &size, &dir);
    buffer = (char *) malloc(size * 4);

    /* Make sure we're running. */
    if ((err = snd_pcm_prepare(handle)) < 0) {
        fprintf(stderr, "Cannot prepare audio interface for use (%s)\n", snd_strerror(err));
        exit(1);
    }

    /* Write some data. */
    loops = 5;
    while (loops > 0) {
        loops--;
        // Fill buffer with your audio data here
        snd_pcm_writei(handle, buffer, size);
    }

    snd_pcm_close(handle);
    free(buffer);
    return 0;
}

gcc -o alsa_test alsa_test.c -lasound
./alsa_test