player_replay.c

   1 #ifndef PLAYER_REPLAY_C
   2 #define PLAYER_REPLAY_C
   3
   4 #include "player_replay.h"
   5 #include "input.h"
   6 #include "gui.h"
   7 #include "freecam.h"
   8
   9 static void replay_clear( replay_buffer *replay ){
  10    replay->head = NULL;
  11    replay->tail = NULL;
  12    replay->cursor_frame = NULL;
  13    replay->statehead = NULL;
  14    replay->cursor = -99999.9;
  15 }
  16
  17 static
  18 void * replay_frame_data( replay_frame *frame, enum replay_framedata type ){
  19    void *baseptr = frame;
  20    return baseptr + frame->data_table[type][0];
  21 }
  22
  23 static u16
  24 replay_frame_calculate_data_offsets( u16 data_table[4][2] ){
  25    u32 total = vg_align8( sizeof(replay_frame) );
  26    for( u32 i=0; i<4; i++ ){
  27       data_table[i][0] = total;
  28       total += vg_align8(data_table[i][1]);
  29
  30       if( total > 0xffff )
  31          vg_fatal_error( "Exceeded frame storage capacity\n" );
  32    }
  33    return total;
  34 }
  35
  36 static void replay_tailpop( replay_buffer *replay ){
  37    if( replay->cursor_frame == replay->tail )
  38       replay->cursor_frame = NULL;
  39    if( replay->statehead == replay->tail )
  40       replay->statehead = NULL;
  41
  42    replay->tail = replay->tail->r;
  43
  44    if( replay->tail )
  45       replay->tail->l = NULL;
  46    else
  47       replay->head = NULL;
  48 }
  49
  50 static replay_frame *replay_newframe( replay_buffer *replay,
  51                                          u16 animator_size,
  52                                          u16 gamestate_size,
  53                                          u16 sfx_count ){
  54    u16 data_table[4][2];
  55    data_table[ k_replay_framedata_animator ][1]  = animator_size;
  56    data_table[ k_replay_framedata_gamestate ][1] = gamestate_size;
  57    data_table[ k_replay_framedata_sfx ][1] = sfx_count*sizeof(struct net_sfx);
  58    data_table[ k_replay_framedata_internal_gamestate ][1] = 0;
  59    if( gamestate_size ){
  60       data_table[ k_replay_framedata_internal_gamestate ][1] =
  61          sizeof( replay_gamestate );
  62    }
  63
  64    u32 nextsize = replay_frame_calculate_data_offsets( data_table );
  65
  66    replay_frame *frame = NULL;
  67    if( replay->head ){
  68       u32 headsize = replay->head->total_size,
  69           nextpos  = ((void *)replay->head - replay->data) + headsize;
  70
  71       if( nextpos + nextsize > replay->size ){
  72          nextpos = 0;
  73
  74          /* maintain contiguity */
  75          while( replay->tail ){
  76             if( (void *)replay->tail - replay->data )
  77                replay_tailpop( replay );
  78             else break;
  79          }
  80       }
  81
  82 check_again:;
  83       u32 tailpos = (void *)replay->tail - replay->data;
  84
  85       if( tailpos >= nextpos ){
  86          if( nextpos + nextsize > tailpos ){
  87             replay_tailpop( replay );
  88
  89             if( replay->tail )
  90                goto check_again;
  91          }
  92       }
  93
  94       frame = replay->data + nextpos;
  95
  96       if( replay->head )
  97          replay->head->r = frame;
  98    }
  99    else
 100       frame = replay->data;
 101
 102    for( u32 i=0; i<4; i++ ){
 103       frame->data_table[i][0] = data_table[i][0];
 104       frame->data_table[i][1] = data_table[i][1];
 105    }
 106
 107    frame->total_size = nextsize;
 108    frame->l = replay->head;
 109    frame->r = NULL;
 110    replay->head = frame;
 111    if( !replay->tail ) replay->tail = frame;
 112    if( gamestate_size ) replay->statehead = frame;
 113
 114    return frame;
 115 }
 116
 117 static void replay_emit_frame_sounds( replay_frame *frame ){
 118    void *baseptr = frame;
 119    u16 *inf = frame->data_table[k_replay_framedata_sfx];
 120    struct net_sfx *buffer = baseptr + inf[0];
 121    u32 count = inf[1] / sizeof(struct net_sfx);
 122
 123    for( u32 i=0; i<count; i ++ ){
 124       net_sfx_play( buffer + i );
 125    }
 126 }
 127
 128 static int replay_seek( replay_buffer *replay, f64 t ){
 129    if( !replay->head ) return 0;
 130    assert( replay->tail );
 131
 132    if( t < replay->tail->time ) t = replay->tail->time;
 133    if( t > replay->head->time ) t = replay->head->time;
 134
 135    if( !replay->cursor_frame ) {
 136       replay->cursor = replay->head->time;
 137       replay->cursor_frame = replay->head;
 138
 139       if( fabs(replay->head->time-t) > fabs(replay->tail->time-t) ){
 140          replay->cursor = replay->tail->time;
 141          replay->cursor_frame = replay->tail;
 142       }
 143    }
 144
 145    f64 dir = t - replay->cursor;
 146    if( dir == 0.0 ) return 0;
 147    dir = vg_signf( dir );
 148
 149
 150    u32 i=4096;
 151    while( i --> 0 ){
 152       if( dir < 0.0 ){
 153          if( t > replay->cursor_frame->time ) {
 154             replay->cursor = t;
 155             return 1;
 156          }
 157       }
 158
 159       replay_frame *next;
 160       if( dir > 0.0 ) next = replay->cursor_frame->r;
 161       else            next = replay->cursor_frame->l;
 162
 163       if( !next ) break;
 164
 165       if( dir > 0.0 ){
 166          if( t < next->time ){
 167             replay->cursor = t;
 168             return 1;
 169          }
 170       }
 171
 172       replay_emit_frame_sounds( next );
 173
 174       replay->cursor_frame = next;
 175       replay->cursor = next->time;
 176
 177       if( !i ) return 1;
 178    }
 179
 180    replay->cursor = t;
 181    return 0;
 182 }
 183
 184 static replay_frame *replay_find_recent_stateframe( replay_buffer *replay ){
 185    replay_frame *frame = replay->cursor_frame;
 186    u32 i=4096;
 187    while( i --> 0 ){
 188       if( !frame ) return frame;
 189       if( frame->data_table[ k_replay_framedata_gamestate ][1] ) return frame;
 190       frame = frame->l;
 191    }
 192
 193    return NULL;
 194 }
 195
 196 static f32 replay_subframe_time( replay_buffer *replay ){
 197    replay_frame *frame = replay->cursor_frame;
 198    if( !frame ) return 0.0f;
 199    replay_frame *next = frame->r;
 200    if( next ){
 201       f64 l = next->time - frame->time,
 202           t = (l <= (1.0/128.0))? 0.0: (replay->cursor - frame->time) / l;
 203       return vg_clampf( t, 0.0f, 1.0f );
 204    }
 205    else
 206       return 0.0f;
 207 }
 208
 209 static void replay_get_frame_camera( replay_frame *frame, camera *cam ){
 210    cam->fov = frame->cam_fov;
 211    v3_copy( frame->cam_pos, cam->pos );
 212    v3_copy( frame->cam_angles, cam->angles );
 213 }
 214
 215 static void replay_get_camera( replay_buffer *replay, camera *cam ){
 216    cam->nearz = 0.1f;
 217    cam->farz = 100.0f;
 218    if( replay->cursor_frame ){
 219       replay_frame *next = replay->cursor_frame->r;
 220
 221       if( next ){
 222          camera temp;
 223
 224          replay_get_frame_camera( replay->cursor_frame, cam );
 225          replay_get_frame_camera( next, &temp );
 226          camera_lerp( cam, &temp, replay_subframe_time( replay ), cam );
 227       }
 228       else {
 229          replay_get_frame_camera( replay->cursor_frame, cam );
 230       }
 231    }
 232    else {
 233       v3_zero( cam->pos );
 234       v3_zero( cam->angles );
 235       cam->fov = 90.0f;
 236    }
 237 }
 238
 239 struct replay_rb{
 240    v3f co, v, w;
 241    v4f q;
 242 };
 243
 244 static void skaterift_record_frame( replay_buffer *replay,
 245                                     int force_gamestate ){
 246    f64 delta      = 9999999.9,
 247        statedelta = 9999999.9;
 248
 249    if( replay->head )
 250       delta = vg.time - replay->head->time;
 251
 252    if( replay->statehead )
 253       statedelta = vg.time - replay->statehead->time;
 254
 255    const f64 k_replay_rate = 1.0/30.0,
 256              k_gamestate_rate = 0.5;
 257
 258    int save_frame = 0,
 259        save_state = 0;
 260
 261    if( force_gamestate ) save_state = 1;
 262    if( statedelta > k_gamestate_rate ) save_state = 1;
 263    if( delta > k_replay_rate ) save_frame = 1;
 264    if( save_state ) save_frame = 1;
 265
 266    if( !save_frame ) return;
 267
 268    u16 gamestate_size = 0;
 269    if( save_state ){
 270       /* TODO: have as part of system struct */
 271       gamestate_size = (u32 []){
 272          [k_player_subsystem_walk ] = sizeof(struct player_walk_state),
 273          [k_player_subsystem_drive] = 0,
 274          [k_player_subsystem_skate] = sizeof(struct player_skate_state),
 275          [k_player_subsystem_dead ] = localplayer.ragdoll.part_count *
 276                                        sizeof(struct replay_rb),
 277       }[ localplayer.subsystem ];
 278    }
 279
 280    u16 animator_size = player_subsystems[localplayer.subsystem]->animator_size;
 281
 282    replay_frame *frame = replay_newframe( replay,
 283                                           animator_size, gamestate_size,
 284                                           localplayer.local_sfx_buffer_count );
 285    frame->system = localplayer.subsystem;
 286
 287    if( save_state ){
 288       replay_gamestate *gs =
 289          replay_frame_data( frame, k_replay_framedata_internal_gamestate );
 290
 291       /* permanent block */
 292       memcpy( &gs->rb, &localplayer.rb, sizeof(rigidbody) );
 293       memcpy( &gs->cam_control, &localplayer.cam_control,
 294                sizeof(struct player_cam_controller) );
 295       v3_copy( localplayer.angles, gs->angles );
 296
 297       void *dst = replay_frame_data( frame, k_replay_framedata_gamestate );
 298
 299       /* subsytem/dynamic block */
 300       if( localplayer.subsystem == k_player_subsystem_walk )
 301          memcpy( dst, &player_walk.state, gamestate_size );
 302       else if( localplayer.subsystem == k_player_subsystem_skate )
 303          memcpy( dst, &player_skate.state, gamestate_size );
 304       else if( localplayer.subsystem == k_player_subsystem_dead ){
 305          struct replay_rb *arr = dst;
 306          for( u32 i=0; i<localplayer.ragdoll.part_count; i ++ ){
 307             rigidbody *rb = &localplayer.ragdoll.parts[i].obj.rb;
 308             v3_copy( rb->co, arr[i].co );
 309             v3_copy( rb->w, arr[i].w );
 310             v3_copy( rb->v, arr[i].v );
 311             v4_copy( rb->q, arr[i].q );
 312          }
 313       }
 314    }
 315
 316    replay->cursor = vg.time;
 317    replay->cursor_frame = frame;
 318    frame->time = vg.time;
 319
 320    /* camera */
 321    v3_copy( localplayer.cam.pos, frame->cam_pos );
 322    if( localplayer.gate_waiting ){
 323       m4x3_mulv( localplayer.gate_waiting->transport,
 324                   frame->cam_pos, frame->cam_pos );
 325
 326       v3f v0;
 327       v3_angles_vector( localplayer.cam.angles, v0 );
 328       m3x3_mulv( localplayer.gate_waiting->transport, v0, v0 );
 329       v3_angles( v0, frame->cam_angles );
 330    }
 331    else
 332       v3_copy( localplayer.cam.angles, frame->cam_angles );
 333
 334    frame->cam_fov = localplayer.cam.fov;
 335
 336    /* animator */
 337    void *dst = replay_frame_data( frame, k_replay_framedata_animator );
 338
 339    if( localplayer.subsystem == k_player_subsystem_walk )
 340       memcpy( dst, &player_walk.animator, animator_size );
 341    else if( localplayer.subsystem == k_player_subsystem_skate )
 342       memcpy( dst, &player_skate.animator, animator_size );
 343    else if( localplayer.subsystem == k_player_subsystem_dead ){
 344       memcpy( dst, &player_dead.animator, animator_size );
 345    }
 346
 347    /* sound effects */
 348    memcpy( replay_frame_data( frame, k_replay_framedata_sfx ),
 349            localplayer.local_sfx_buffer,
 350            sizeof(struct net_sfx)*localplayer.local_sfx_buffer_count );
 351
 352    localplayer.local_sfx_buffer_count = 0;
 353 }
 354
 355 static
 356 void skaterift_restore_frame( replay_frame *frame ){
 357    replay_gamestate *gs =
 358       replay_frame_data( frame, k_replay_framedata_internal_gamestate );
 359    void *src = replay_frame_data( frame, k_replay_framedata_gamestate );
 360    u16 src_size = frame->data_table[ k_replay_framedata_gamestate ][1];
 361    assert( src_size );
 362
 363    if(frame->system == k_player_subsystem_walk ){
 364       memcpy( &player_walk.state, src, src_size );
 365    }
 366    else if( frame->system == k_player_subsystem_skate ){
 367       memcpy( &player_skate.state, src, src_size );
 368    }
 369    else if( frame->system == k_player_subsystem_dead ){
 370       player__dead_transition(0);
 371       struct replay_rb *arr = src;
 372
 373       for( u32 i=0; i<localplayer.ragdoll.part_count; i ++ ){
 374          struct ragdoll_part *part = &localplayer.ragdoll.parts[i];
 375          rigidbody *rb = &part->obj.rb;
 376
 377          v3_copy( arr[i].co, rb->co );
 378          v3_copy( arr[i].w, rb->w );
 379          v3_copy( arr[i].v, rb->v );
 380          v4_copy( arr[i].q, rb->q );
 381
 382          v3_copy( arr[i].co, part->prev_co );
 383          v4_copy( arr[i].q, part->prev_q );
 384       }
 385    }
 386
 387    localplayer.subsystem = frame->system;
 388
 389    memcpy( &localplayer.rb, &gs->rb, sizeof(rigidbody) );
 390    v3_copy( gs->angles, localplayer.angles );
 391
 392    v3_copy( frame->cam_pos, localplayer.cam.pos );
 393    v3_copy( frame->cam_angles, localplayer.cam.angles );
 394    localplayer.cam.fov = frame->cam_fov;
 395
 396    memcpy( &localplayer.cam_control, &gs->cam_control,
 397             sizeof(struct player_cam_controller) );
 398
 399    /* chop end off replay */
 400    frame->r = NULL;
 401    skaterift.replay.statehead = frame;
 402    skaterift.replay.head = frame;
 403    skaterift.replay.cursor_frame = frame;
 404    skaterift.replay.cursor = frame->time;
 405    skaterift.replay_control = k_replay_control_scrub;
 406    skaterift.activity = k_skaterift_default;
 407    vg.time = frame->time;
 408 }
 409
 410 static void skaterift_replay_resume(void){
 411    replay_frame *prev = replay_find_recent_stateframe(&skaterift.replay);
 412
 413    if( prev ){
 414       skaterift.replay_control = k_replay_control_resume;
 415       skaterift.resume_target = prev;
 416       skaterift.resume_begin = skaterift.replay.cursor;
 417       skaterift.resume_transition = 0.0f;
 418    }
 419
 420    gui_helper_clear();
 421 }
 422
 423 static void skaterift_replay_update_helpers(void);
 424
 425 static void skaterift_replay_pre_update(void){
 426    if( skaterift.activity != k_skaterift_replay ) return;
 427
 428    if( skaterift.replay_control == k_replay_control_resume ){
 429       if( skaterift.replay.cursor_frame == skaterift.resume_target ||
 430           skaterift.replay.cursor_frame == NULL ){
 431          skaterift_restore_frame( skaterift.resume_target );
 432       }
 433       else {
 434          vg_slewf( &skaterift.resume_transition, 1.0f,
 435                    vg.time_frame_delta * (1.0f/1.0f) );
 436
 437          if( skaterift.resume_transition >= 1.0f )
 438             skaterift_restore_frame( skaterift.resume_target );
 439          else {
 440             f64 target = vg_lerp( skaterift.resume_begin,
 441                               skaterift.resume_target->time,
 442                               vg_smoothstepf( skaterift.resume_transition ) );
 443             if( replay_seek( &skaterift.replay, target ) )
 444                skaterift.track_velocity = 1.0f;
 445             else
 446                skaterift.track_velocity = 0.0f;
 447          }
 448       }
 449    }
 450    else {
 451       if( button_down( k_srbind_replay_play ) )
 452          skaterift.replay_control = k_replay_control_play;
 453       if( button_down( k_srbind_replay_freecam ) ){
 454          skaterift.freecam = skaterift.freecam ^ 0x1;
 455
 456          if( skaterift.freecam )
 457             replay_get_camera( &skaterift.replay, &skaterift.replay_freecam );
 458
 459          skaterift_replay_update_helpers();
 460       }
 461
 462       f32 target_speed = axis_state( k_sraxis_replay_h ) * 5.0;
 463       if( button_press( k_srbind_reset ) )
 464          target_speed += -2.0;
 465
 466       if( fabsf(target_speed) > 0.01f )
 467          skaterift.replay_control = k_replay_control_scrub;
 468
 469       if( skaterift.replay_control == k_replay_control_play )
 470          target_speed = 1.0;
 471
 472       vg_slewf( &skaterift.track_velocity, target_speed,
 473                 18.0f*vg.time_frame_delta );
 474
 475       if( fabsf( skaterift.track_velocity ) > 0.0001f ){
 476          f64 target = skaterift.replay.cursor;
 477          target += skaterift.track_velocity * vg.time_frame_delta;
 478
 479          if( !replay_seek( &skaterift.replay, target ) )
 480             skaterift.track_velocity = 0.0f;
 481       }
 482
 483       if( button_down( k_srbind_mback ) ){
 484          if( skaterift.replay.statehead )
 485             skaterift_restore_frame( skaterift.replay.statehead );
 486          else
 487             skaterift.activity = k_skaterift_default;
 488          srinput.state = k_input_state_resume;
 489          gui_helper_clear();
 490       }
 491
 492       if( skaterift.freecam ){
 493          //freecam_preupdate();
 494       }
 495       else {
 496          if( button_down( k_srbind_replay_resume ) ){
 497             skaterift_replay_resume();
 498          }
 499       }
 500    }
 501 }
 502
 503 static void skaterift_replay_update_helpers(void){
 504    skaterift.helper_resume->greyed = skaterift.freecam;
 505
 506    vg_str freecam_text;
 507    vg_strnull( &freecam_text, skaterift.helper_freecam->text,
 508                GUI_HELPER_TEXT_LENGTH );
 509    vg_strcat( &freecam_text, skaterift.freecam? "exit freecam": "freecam" );
 510 }
 511
 512 static void skaterift_replay_post_render(void){
 513    if( world_static.active_instance != k_world_purpose_client )
 514       return;
 515
 516    /* capture the current resume frame at the very last point */
 517    if( button_down( k_srbind_reset ) ){
 518       if( skaterift.activity == k_skaterift_default ){
 519          localplayer.rewinded_since_last_gate = 1;
 520          skaterift.activity = k_skaterift_replay;
 521          skaterift_record_frame( &skaterift.replay, 1 );
 522          if( skaterift.replay.head ){
 523             skaterift.replay.cursor = skaterift.replay.head->time;
 524             skaterift.replay.cursor_frame = skaterift.replay.head;
 525          }
 526          skaterift.replay_control = k_replay_control_scrub;
 527
 528          gui_helper_clear();
 529          vg_str text;
 530
 531          if( gui_new_helper( input_axis_list[k_sraxis_replay_h], &text ) )
 532             vg_strcat( &text, "scrub" );
 533
 534          if( (skaterift.helper_resume = gui_new_helper(
 535                      input_button_list[k_srbind_replay_resume], &text )) )
 536             vg_strcat( &text, "resume" );
 537
 538          if( gui_new_helper( input_button_list[k_srbind_replay_play], &text ))
 539             vg_strcat( &text, "playback" );
 540
 541          skaterift.helper_freecam = gui_new_helper(
 542                input_button_list[k_srbind_replay_freecam], &text );
 543
 544          skaterift_replay_update_helpers();
 545       }
 546    }
 547 }
 548
 549 #if 0
 550 static void skaterift_get_replay_camera( camera *cam ){
 551    if( skaterift.freecam ){
 552       cam->nearz = 0.1f;
 553       cam->farz = 100.0f;
 554       v3_copy( skaterift.replay_freecam.pos, cam->pos );
 555       v3_copy( skaterift.replay_freecam.angles, cam->angles );
 556       cam->fov = skaterift.replay_freecam.fov;
 557    }
 558    else{
 559       replay_get_camera( &skaterift.replay, &skaterift.cam );
 560    }
 561 }
 562 #endif
 563
 564 static void skaterift_replay_debug_info(void){
 565    player__debugtext( 2, "replay info" );
 566
 567    replay_buffer *replay = &skaterift.replay;
 568
 569    u32 head = 0,
 570        tail = 0;
 571    if( replay->tail ) tail = (void *)replay->tail - replay->data;
 572    if( replay->head ) head = (void *)replay->head - replay->data;
 573
 574    player__debugtext( 1, "head @%u | tail @%u\n", head, tail );
 575
 576    if( replay->statehead ){
 577       for( u32 i=0; i<4; i++ ){
 578          player__debugtext( 1, "[%u]: [%hu, %hu]\n", i,
 579               replay->statehead->data_table[i][0],
 580               replay->statehead->data_table[i][1] );
 581       }
 582       u32 state = (void *)replay->statehead - replay->data;
 583       player__debugtext( 1, "gs @%u\n", state );
 584       player__debugtext( 1, "gamestate_size: %hu\n",
 585            replay->statehead->data_table[k_replay_framedata_gamestate][1] );
 586    }
 587    else
 588       player__debugtext( 1, "gs @NULL\n" );
 589
 590    f64 start = replay->cursor,
 591        end   = replay->cursor;
 592    if( replay->tail ) start = replay->tail->time;
 593    if( replay->head ) end = replay->head->time;
 594
 595    f64 cur = replay->cursor - start,
 596        len = end - start;
 597
 598    player__debugtext( 1, "cursor: %.2fs / %.2fs\n", cur, len );
 599 }
 600
 601 static void skaterift_replay_imgui(void){
 602    if( skaterift.activity != k_skaterift_replay ) return;
 603
 604    replay_buffer *replay = &skaterift.replay;
 605    f64 start = replay->cursor,
 606        end   = replay->cursor;
 607    if( replay->tail ) start = replay->tail->time;
 608    if( replay->head ) end = replay->head->time;
 609    f64 len = end - start,
 610        cur = (replay->cursor - start) / len;
 611
 612    char buffer[ 128 ];
 613
 614    /* mainbar */
 615    ui_px height = 32,
 616          cwidth = 2;
 617    ui_rect bar = { 0, 0, vg.window_x, height };
 618    ui_fill( bar, ui_colour( k_ui_bg ) );
 619
 620    /* cursor frame block */
 621    if( replay->cursor_frame ){
 622       if( replay->cursor_frame->r ){
 623          f64 l = (replay->cursor_frame->r->time-replay->cursor_frame->time)/len,
 624              s = (replay->cursor_frame->time - start) / len;
 625          ui_rect box = { s*(f64)vg.window_x, 0,
 626                          VG_MAX(4,(ui_px)(l*vg.window_x)), bar[3]+2 };
 627          ui_fill( box, ui_colour( k_ui_bg+4 ) );
 628       }
 629    }
 630
 631    /* cursor */
 632    ui_rect cusor = { cur * (f64)vg.window_x - (cwidth/2), 0,
 633                      cwidth, bar[3] };
 634    ui_fill( cusor, ui_colour( k_ui_bg+7 ) );
 635
 636    /* latest state marker */
 637    if( replay->statehead ){
 638       f64 t = (replay->statehead->time - start) / len;
 639       ui_rect tag = { t*(f64)vg.window_x, 0, 2, bar[3]+8 };
 640       ui_fill( tag, ui_colour( k_ui_green+k_ui_brighter ) );
 641    }
 642
 643    /* previous state marker */
 644    replay_frame *prev = replay_find_recent_stateframe( replay );
 645    if( prev ){
 646       f64 t = (prev->time - start) / len;
 647       ui_rect tag = { t*(f64)vg.window_x, 0, 2, bar[3]+8 };
 648       ui_fill( tag, ui_colour( k_ui_yellow+k_ui_brighter ) );
 649    }
 650
 651    cusor[1] -= height;
 652    cusor[2] = 200;
 653    snprintf( buffer, 128, "-%.2fs\n", (end-replay->cursor) );
 654    ui_text( cusor, buffer, 1, k_ui_align_middle_left, 0 );
 655
 656    snprintf( buffer, 128, "-%.2fs\n", len );
 657    ui_text( bar, buffer, 1, k_ui_align_middle_left, 0 );
 658    ui_text( bar, "0s", 1, k_ui_align_middle_right, 0 );
 659 }
 660
 661 #endif /* PLAYER_REPLAY_C */