break; case SDLK_s: step_to_next_frame();
void event_loop(void){    SDL_Event event;    double incr, pos, frac;    for(;;) {        SDL_WaitEvent(&event);        switch(event.type) {        case SDL_KEYDOWN:            switch(event.key.keysym.sym) {            case SDLK_ESCAPE:            case SDLK_q:                do_exit();                break;            case SDLK_f:                toggle_full_screen();                break;            case SDLK_p:            case SDLK_SPACE:                toggle_pause();                break;            case SDLK_a:                if (cur_stream)                     stream_cycle_channel(cur_stream, CODEC_TYPE_AUDIO);                break;            case SDLK_v:                if (cur_stream)                     stream_cycle_channel(cur_stream, CODEC_TYPE_VIDEO);                break;            case SDLK_w:                toggle_audio_display();                break;            case SDLK_LEFT:                incr = -10.0;                goto do_seek;            case SDLK_RIGHT:                incr = 10.0;                goto do_seek;            case SDLK_UP:                incr = 60.0;                goto do_seek;            case SDLK_DOWN:                incr = -60.0;            do_seek:                if (cur_stream) {                    pos = get_master_clock(cur_stream);                    pos += incr;                    stream_seek(cur_stream, (int64_t)(pos * AV_TIME_BASE));                }                break;            default:                break;            }            break;        case SDL_MOUSEBUTTONDOWN:	    if (cur_stream) {		int ns, hh, mm, ss;		int tns, thh, tmm, tss;		tns = cur_stream->ic->duration/1000000LL;		thh = tns/3600;		tmm = (tns%3600)/60;		tss = (tns%60);		frac = (double)event.button.x/(double)cur_stream->width;		ns = frac*tns;		hh = ns/3600;		mm = (ns%3600)/60;		ss = (ns%60);		fprintf(stderr, "Seek to %2.0f%% (%2d:%02d:%02d) of total duration (%2d:%02d:%02d)       \n", frac*100,			hh, mm, ss, thh, tmm, tss);		stream_seek(cur_stream, (int64_t)(cur_stream->ic->start_time+frac*cur_stream->ic->duration));	    }	    break;        case SDL_VIDEORESIZE:            if (cur_stream) {                screen = SDL_SetVideoMode(event.resize.w, event.resize.h, 0,                                           SDL_HWSURFACE|SDL_RESIZABLE|SDL_ASYNCBLIT|SDL_HWACCEL);                cur_stream->width = event.resize.w;                cur_stream->height = event.resize.h;            }            break;        case SDL_QUIT:        case FF_QUIT_EVENT:            do_exit();            break;        case FF_ALLOC_EVENT:            alloc_picture(event.user.data1);            break;        case FF_REFRESH_EVENT:            video_refresh_timer(event.user.data1);            break;        default:            break;        }    }}