linux安装alsa库

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

int main() {
    int err;
    snd_pcm_t *handle;
    snd_pcm_sframes_t frames;

    if ((err = snd_pcm_open(&handle, "default", SND_PCM_STREAM_PLAYBACK, 0)) < 0) {
        fprintf(stderr, "Cannot open audio device (%s)\n", snd_strerror(err));
        return 1;
    }

    // 设置音频参数
    snd_pcm_hw_params_t *params;
    snd_pcm_hw_params_malloc(&params);
    snd_pcm_hw_params_any(handle, params);
    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_channels(handle, params, 2);
    snd_pcm_hw_params_set_rate_near(handle, params, 44100, 0);
    snd_pcm_hw_params(handle, params);
    snd_pcm_hw_params_free(params);

    // 播放音频数据
    short buffer[32];
    while (1) {
        // 填充buffer数据
        frames = snd_pcm_writei(handle, buffer, 16);
        if (frames < 0) {
            frames = snd_pcm_recover(handle, frames, 0);
        }
        if (frames < 0) {
            fprintf(stderr, "Write error (%s)\n", snd_strerror(frames));
            break;
        }
    }

    snd_pcm_close(handle);
    return 0;
}

gcc -o alsa_example alsa_example.c -lasound
./alsa_example