opt_output_file(audio_device);
opt_output_file(audio_device?audio_device:"/dev/dsp0");
void prepare_play(void){    int has_video, has_audio;        check_audio_video_inputs(&has_video, &has_audio);            /* manual disable */    if (audio_disable) {        has_audio = 0;    }    if (video_disable) {        has_video = 0;    }            if (has_audio) {        file_oformat = guess_format("audio_device", NULL, NULL);        if (!file_oformat) {            fprintf(stderr, "Could not find audio device\n");            exit(1);        }        opt_output_file(audio_device);    }    if (has_video) {        file_oformat = guess_format("framebuffer_device", NULL, NULL);        if (!file_oformat) {            fprintf(stderr, "Could not find framebuffer device\n");            exit(1);        }        opt_output_file("");    }}