alsa_mixer_noheader.c

int printf(char*, ...);
int snd_mixer_open(void**, int);
int snd_mixer_attach(void* mixer, char*);
int snd_mixer_selem_register(void*, void*, void**);
int snd_mixer_load(void* mixer);
void* snd_mixer_first_elem(void*);
void* snd_mixer_elem_next(void*);
char *snd_mixer_selem_get_name(void*);
int snd_mixer_selem_get_playback_volume_range(void*, long*, long*);
int snd_mixer_close(void*);
char* snd_mixer_selem_get_name(void*);
int snd_mixer_selem_set_playback_volume_all(void*, long);

int main()
{
    void* handle;
    void* elem;

    snd_mixer_open(&handle, 0);
    snd_mixer_attach(handle, "default");
    snd_mixer_selem_register(handle, 0, 0);
    snd_mixer_load(handle);

    elem = snd_mixer_first_elem(handle);

    while (elem)
    {
        long min, max;

        snd_mixer_selem_get_playback_volume_range(
            elem, &min, &max
        );

        snd_mixer_selem_set_playback_volume_all(elem, max);
        printf("%s\n", snd_mixer_selem_get_name(elem));

        elem = snd_mixer_elem_next(elem);
    }

    snd_mixer_close(handle);

    return 0;
}