git.sesse.net Git - vlc/blob - src/video_output/video_output.c

   1 /*****************************************************************************
   2  * video_output.c : video output thread
   3  *
   4  * This module describes the programming interface for video output threads.
   5  * It includes functions allowing to open a new thread, send pictures to a
   6  * thread, and destroy a previously oppened video output thread.
   7  *****************************************************************************
   8  * Copyright (C) 2000-2007 the VideoLAN team
   9  * $Id$
  10  *
  11  * Authors: Vincent Seguin <seguin@via.ecp.fr>
  12  *          Gildas Bazin <gbazin@videolan.org>
  13  *          Laurent Aimar <fenrir _AT_ videolan _DOT_ org>
  14  *
  15  * This program is free software; you can redistribute it and/or modify
  16  * it under the terms of the GNU General Public License as published by
  17  * the Free Software Foundation; either version 2 of the License, or
  18  * (at your option) any later version.
  19  *
  20  * This program is distributed in the hope that it will be useful,
  21  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  22  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  23  * GNU General Public License for more details.
  24  *
  25  * You should have received a copy of the GNU General Public License
  26  * along with this program; if not, write to the Free Software
  27  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
  28  *****************************************************************************/
  29
  30 /*****************************************************************************
  31  * Preamble
  32  *****************************************************************************/
  33 #ifdef HAVE_CONFIG_H
  34 # include "config.h"
  35 #endif
  36
  37 #include <vlc_common.h>
  38
  39 #include <stdlib.h>                                                /* free() */
  40 #include <string.h>
  41 #include <assert.h>
  42
  43 #include <vlc_vout.h>
  44
  45 #include <vlc_filter.h>
  46 #include <vlc_vout_osd.h>
  47
  48 #include <libvlc.h>
  49 #include "vout_internal.h"
  50 #include "interlacing.h"
  51 #include "postprocessing.h"
  52 #include "display.h"
  53
  54 /*****************************************************************************
  55  * Local prototypes
  56  *****************************************************************************/
  57 static void *Thread(void *);
  58 static void VoutDestructor(vlc_object_t *);
  59
  60 /* Maximum delay between 2 displayed pictures.
  61  * XXX it is needed for now but should be removed in the long term.
  62  */
  63 #define VOUT_REDISPLAY_DELAY (INT64_C(80000))
  64
  65 /**
  66  * Late pictures having a delay higher than this value are thrashed.
  67  */
  68 #define VOUT_DISPLAY_LATE_THRESHOLD (INT64_C(20000))
  69
  70 /* Better be in advance when awakening than late... */
  71 #define VOUT_MWAIT_TOLERANCE (INT64_C(1000))
  72
  73 /* */
  74 static int VoutValidateFormat(video_format_t *dst,
  75                               const video_format_t *src)
  76 {
  77     if (src->i_width <= 0 || src->i_height <= 0)
  78         return VLC_EGENERIC;
  79     if (src->i_sar_num <= 0 || src->i_sar_den <= 0)
  80         return VLC_EGENERIC;
  81
  82     /* */
  83     video_format_Copy(dst, src);
  84     dst->i_chroma = vlc_fourcc_GetCodec(VIDEO_ES, src->i_chroma);
  85     vlc_ureduce( &dst->i_sar_num, &dst->i_sar_den,
  86                  src->i_sar_num,  src->i_sar_den, 50000 );
  87     if (dst->i_sar_num <= 0 || dst->i_sar_den <= 0) {
  88         dst->i_sar_num = 1;
  89         dst->i_sar_den = 1;
  90     }
  91     video_format_FixRgb(dst);
  92     return VLC_SUCCESS;
  93 }
  94
  95 static vout_thread_t *VoutCreate(vlc_object_t *object,
  96                                  const vout_configuration_t *cfg)
  97 {
  98     video_format_t original;
  99     if (VoutValidateFormat(&original, cfg->fmt))
 100         return NULL;
 101
 102     /* Allocate descriptor */
 103     vout_thread_t *vout = vlc_custom_create(object,
 104                                             sizeof(*vout) + sizeof(*vout->p),
 105                                             VLC_OBJECT_VOUT, "video output");
 106     if (!vout) {
 107         video_format_Clean(&original);
 108         return NULL;
 109     }
 110
 111     /* */
 112     vout->p = (vout_thread_sys_t*)&vout[1];
 113
 114     vout->p->original = original;
 115     vout->p->dpb_size = cfg->dpb_size;
 116
 117     vout_control_Init(&vout->p->control);
 118     vout_control_PushVoid(&vout->p->control, VOUT_CONTROL_INIT);
 119
 120     vout_statistic_Init(&vout->p->statistic);
 121     vout->p->i_par_num =
 122     vout->p->i_par_den = 1;
 123
 124     vout_snapshot_Init(&vout->p->snapshot);
 125
 126     /* Initialize locks */
 127     vlc_mutex_init(&vout->p->picture_lock);
 128     vlc_mutex_init(&vout->p->vfilter_lock);
 129
 130     /* Attach the new object now so we can use var inheritance below */
 131     vlc_object_attach(vout, object);
 132
 133     /* Initialize subpicture unit */
 134     vout->p->p_spu = spu_Create(vout);
 135
 136     /* Take care of some "interface/control" related initialisations */
 137     vout_IntfInit(vout);
 138
 139     /* Get splitter name if present */
 140     char *splitter_name = var_GetNonEmptyString(vout, "vout-filter");
 141     if (splitter_name) {
 142         if (asprintf(&vout->p->splitter_name, "%s,none", splitter_name) < 0)
 143             vout->p->splitter_name = NULL;
 144         free(splitter_name);
 145     } else {
 146         vout->p->splitter_name = NULL;
 147     }
 148
 149     /* */
 150     vout_InitInterlacingSupport(vout, vout->p->displayed.is_interlaced);
 151
 152     /* */
 153     vlc_object_set_destructor(vout, VoutDestructor);
 154
 155     /* */
 156     if (vlc_clone(&vout->p->thread, Thread, vout,
 157                   VLC_THREAD_PRIORITY_OUTPUT)) {
 158         spu_Destroy(vout->p->p_spu);
 159         vlc_object_release(vout);
 160         return NULL;
 161     }
 162
 163     vout_control_WaitEmpty(&vout->p->control);
 164
 165     if (vout->p->dead) {
 166         msg_Err(vout, "video output creation failed");
 167         vout_CloseAndRelease(vout);
 168         return NULL;
 169     }
 170
 171     vout->p->input = cfg->input;
 172     if (vout->p->input)
 173         spu_Attach(vout->p->p_spu, vout->p->input, true);
 174
 175     return vout;
 176 }
 177
 178 vout_thread_t *(vout_Request)(vlc_object_t *object,
 179                               const vout_configuration_t *cfg)
 180 {
 181     vout_thread_t *vout = cfg->vout;
 182     if (cfg->change_fmt && !cfg->fmt) {
 183         if (vout)
 184             vout_CloseAndRelease(vout);
 185         return NULL;
 186     }
 187
 188     /* If a vout is provided, try reusing it */
 189     if (vout) {
 190         if (vout->p->input != cfg->input) {
 191             if (vout->p->input)
 192                 spu_Attach(vout->p->p_spu, vout->p->input, false);
 193             vout->p->input = cfg->input;
 194             if (vout->p->input)
 195                 spu_Attach(vout->p->p_spu, vout->p->input, true);
 196         }
 197
 198         if (cfg->change_fmt) {
 199             vout_control_cmd_t cmd;
 200             vout_control_cmd_Init(&cmd, VOUT_CONTROL_REINIT);
 201             cmd.u.cfg = cfg;
 202
 203             vout_control_Push(&vout->p->control, &cmd);
 204             vout_control_WaitEmpty(&vout->p->control);
 205         }
 206
 207         if (!vout->p->dead) {
 208             msg_Dbg(object, "reusing provided vout");
 209             return vout;
 210         }
 211         vout_CloseAndRelease(vout);
 212
 213         msg_Warn(object, "cannot reuse provided vout");
 214     }
 215     return VoutCreate(object, cfg);
 216 }
 217
 218 /*****************************************************************************
 219  * vout_Close: Close a vout created by VoutCreate.
 220  *****************************************************************************
 221  * You HAVE to call it on vout created by VoutCreate before vlc_object_release.
 222  * You should NEVER call it on vout not obtained through VoutCreate
 223  * (like with vout_Request or vlc_object_find.)
 224  * You can use vout_CloseAndRelease() as a convenience method.
 225  *****************************************************************************/
 226 void vout_Close(vout_thread_t *vout)
 227 {
 228     assert(vout);
 229
 230     if (vout->p->input)
 231         spu_Attach(vout->p->p_spu, vout->p->input, false);
 232
 233     vout_snapshot_End(&vout->p->snapshot);
 234
 235     vout_control_PushVoid(&vout->p->control, VOUT_CONTROL_CLEAN);
 236     vlc_join(vout->p->thread, NULL);
 237
 238     spu_Destroy(vout->p->p_spu);
 239 }
 240
 241 /* */
 242 static void VoutDestructor(vlc_object_t *object)
 243 {
 244     vout_thread_t *vout = (vout_thread_t *)object;
 245
 246     /* Make sure the vout was stopped first */
 247     //assert(!vout->p_module);
 248
 249     free(vout->p->splitter_name);
 250
 251     /* Destroy the locks */
 252     vlc_mutex_destroy(&vout->p->picture_lock);
 253     vlc_mutex_destroy(&vout->p->vfilter_lock);
 254     vout_control_Clean(&vout->p->control);
 255
 256     /* */
 257     vout_statistic_Clean(&vout->p->statistic);
 258
 259     /* */
 260     vout_snapshot_Clean(&vout->p->snapshot);
 261
 262     video_format_Clean(&vout->p->original);
 263 }
 264
 265 /* */
 266 void vout_ChangePause(vout_thread_t *vout, bool is_paused, mtime_t date)
 267 {
 268     vout_control_cmd_t cmd;
 269     vout_control_cmd_Init(&cmd, VOUT_CONTROL_PAUSE);
 270     cmd.u.pause.is_on = is_paused;
 271     cmd.u.pause.date  = date;
 272     vout_control_Push(&vout->p->control, &cmd);
 273
 274     vout_control_WaitEmpty(&vout->p->control);
 275 }
 276
 277 void vout_GetResetStatistic(vout_thread_t *vout, int *displayed, int *lost)
 278 {
 279     vout_statistic_GetReset( &vout->p->statistic, displayed, lost );
 280 }
 281
 282 void vout_Flush(vout_thread_t *vout, mtime_t date)
 283 {
 284     vout_control_PushTime(&vout->p->control, VOUT_CONTROL_FLUSH, date);
 285     vout_control_WaitEmpty(&vout->p->control);
 286 }
 287
 288 void vout_Reset(vout_thread_t *vout)
 289 {
 290     vout_control_PushVoid(&vout->p->control, VOUT_CONTROL_RESET);
 291     vout_control_WaitEmpty(&vout->p->control);
 292 }
 293
 294 bool vout_IsEmpty(vout_thread_t *vout)
 295 {
 296     vlc_mutex_lock(&vout->p->picture_lock);
 297
 298     picture_t *picture = picture_fifo_Peek(vout->p->decoder_fifo);
 299     if (picture)
 300         picture_Release(picture);
 301
 302     vlc_mutex_unlock(&vout->p->picture_lock);
 303
 304     return !picture;
 305 }
 306
 307 void vout_FixLeaks( vout_thread_t *vout )
 308 {
 309     vlc_mutex_lock(&vout->p->picture_lock);
 310
 311     picture_t *picture = picture_fifo_Peek(vout->p->decoder_fifo);
 312     if (!picture) {
 313         picture = picture_pool_Get(vout->p->decoder_pool);
 314     }
 315
 316     if (picture) {
 317         picture_Release(picture);
 318         /* Not all pictures has been displayed yet or some are
 319          * free */
 320         vlc_mutex_unlock(&vout->p->picture_lock);
 321         return;
 322     }
 323
 324     /* There is no reason that no pictures are available, force one
 325      * from the pool, becarefull with it though */
 326     msg_Err(vout, "pictures leaked, trying to workaround");
 327
 328     /* */
 329     picture_pool_NonEmpty(vout->p->decoder_pool, false);
 330
 331     vlc_mutex_unlock(&vout->p->picture_lock);
 332 }
 333 void vout_NextPicture(vout_thread_t *vout, mtime_t *duration)
 334 {
 335     vout_control_cmd_t cmd;
 336     vout_control_cmd_Init(&cmd, VOUT_CONTROL_STEP);
 337     cmd.u.time_ptr = duration;
 338
 339     vout_control_Push(&vout->p->control, &cmd);
 340     vout_control_WaitEmpty(&vout->p->control);
 341 }
 342
 343 void vout_DisplayTitle(vout_thread_t *vout, const char *title)
 344 {
 345     assert(title);
 346     vout_control_PushString(&vout->p->control, VOUT_CONTROL_OSD_TITLE, title);
 347 }
 348
 349 void vout_PutSubpicture( vout_thread_t *vout, subpicture_t *subpic )
 350 {
 351     vout_control_cmd_t cmd;
 352     vout_control_cmd_Init(&cmd, VOUT_CONTROL_SUBPICTURE);
 353     cmd.u.subpicture = subpic;
 354
 355     vout_control_Push(&vout->p->control, &cmd);
 356 }
 357 int vout_RegisterSubpictureChannel( vout_thread_t *vout )
 358 {
 359     int channel = SPU_DEFAULT_CHANNEL;
 360
 361     vout_control_cmd_t cmd;
 362     vout_control_cmd_Init(&cmd, VOUT_CONTROL_REGISTER_SUBPICTURE);
 363     cmd.u.integer_ptr = &channel;
 364
 365     vout_control_Push(&vout->p->control, &cmd);
 366     vout_control_WaitEmpty(&vout->p->control);
 367
 368     return channel;
 369 }
 370 void vout_FlushSubpictureChannel( vout_thread_t *vout, int channel )
 371 {
 372     vout_control_PushInteger(&vout->p->control, VOUT_CONTROL_FLUSH_SUBPICTURE,
 373                              channel);
 374 }
 375
 376 /* vout_Control* are usable by anyone at anytime */
 377 void vout_ControlChangeFullscreen(vout_thread_t *vout, bool fullscreen)
 378 {
 379     vout_control_PushBool(&vout->p->control, VOUT_CONTROL_FULLSCREEN,
 380                           fullscreen);
 381 }
 382 void vout_ControlChangeOnTop(vout_thread_t *vout, bool is_on_top)
 383 {
 384     vout_control_PushBool(&vout->p->control, VOUT_CONTROL_ON_TOP,
 385                           is_on_top);
 386 }
 387 void vout_ControlChangeDisplayFilled(vout_thread_t *vout, bool is_filled)
 388 {
 389     vout_control_PushBool(&vout->p->control, VOUT_CONTROL_DISPLAY_FILLED,
 390                           is_filled);
 391 }
 392 void vout_ControlChangeZoom(vout_thread_t *vout, int num, int den)
 393 {
 394     vout_control_PushPair(&vout->p->control, VOUT_CONTROL_ZOOM,
 395                           num, den);
 396 }
 397 void vout_ControlChangeSampleAspectRatio(vout_thread_t *vout,
 398                                          unsigned num, unsigned den)
 399 {
 400     vout_control_PushPair(&vout->p->control, VOUT_CONTROL_ASPECT_RATIO,
 401                           num, den);
 402 }
 403 void vout_ControlChangeCropRatio(vout_thread_t *vout,
 404                                  unsigned num, unsigned den)
 405 {
 406     vout_control_PushPair(&vout->p->control, VOUT_CONTROL_CROP_RATIO,
 407                           num, den);
 408 }
 409 void vout_ControlChangeCropWindow(vout_thread_t *vout,
 410                                   int x, int y, int width, int height)
 411 {
 412     vout_control_cmd_t cmd;
 413     vout_control_cmd_Init(&cmd, VOUT_CONTROL_CROP_WINDOW);
 414     cmd.u.window.x      = x;
 415     cmd.u.window.y      = y;
 416     cmd.u.window.width  = width;
 417     cmd.u.window.height = height;
 418
 419     vout_control_Push(&vout->p->control, &cmd);
 420 }
 421 void vout_ControlChangeCropBorder(vout_thread_t *vout,
 422                                   int left, int top, int right, int bottom)
 423 {
 424     vout_control_cmd_t cmd;
 425     vout_control_cmd_Init(&cmd, VOUT_CONTROL_CROP_BORDER);
 426     cmd.u.border.left   = left;
 427     cmd.u.border.top    = top;
 428     cmd.u.border.right  = right;
 429     cmd.u.border.bottom = bottom;
 430
 431     vout_control_Push(&vout->p->control, &cmd);
 432 }
 433 void vout_ControlChangeFilters(vout_thread_t *vout, const char *filters)
 434 {
 435     vout_control_PushString(&vout->p->control, VOUT_CONTROL_CHANGE_FILTERS,
 436                             filters);
 437 }
 438 void vout_ControlChangeSubFilters(vout_thread_t *vout, const char *filters)
 439 {
 440     vout_control_PushString(&vout->p->control, VOUT_CONTROL_CHANGE_SUB_FILTERS,
 441                             filters);
 442 }
 443
 444 /* */
 445 static void VoutGetDisplayCfg(vout_thread_t *vout, vout_display_cfg_t *cfg, const char *title)
 446 {
 447     /* Load configuration */
 448     cfg->is_fullscreen = var_CreateGetBool(vout, "fullscreen");
 449     cfg->display.title = title;
 450     const int display_width = var_CreateGetInteger(vout, "width");
 451     const int display_height = var_CreateGetInteger(vout, "height");
 452     cfg->display.width   = display_width > 0  ? display_width  : 0;
 453     cfg->display.height  = display_height > 0 ? display_height : 0;
 454     cfg->is_display_filled  = var_CreateGetBool(vout, "autoscale");
 455     cfg->display.sar.num = 1; /* TODO monitor AR */
 456     cfg->display.sar.den = 1;
 457     unsigned zoom_den = 1000;
 458     unsigned zoom_num = zoom_den * var_CreateGetFloat(vout, "scale");
 459     vlc_ureduce(&zoom_num, &zoom_den, zoom_num, zoom_den, 0);
 460     cfg->zoom.num = zoom_num;
 461     cfg->zoom.den = zoom_den;
 462     cfg->align.vertical = VOUT_DISPLAY_ALIGN_CENTER;
 463     cfg->align.horizontal = VOUT_DISPLAY_ALIGN_CENTER;
 464     const int align_mask = var_CreateGetInteger(vout, "align");
 465     if (align_mask & 0x1)
 466         cfg->align.horizontal = VOUT_DISPLAY_ALIGN_LEFT;
 467     else if (align_mask & 0x2)
 468         cfg->align.horizontal = VOUT_DISPLAY_ALIGN_RIGHT;
 469     if (align_mask & 0x4)
 470         cfg->align.horizontal = VOUT_DISPLAY_ALIGN_TOP;
 471     else if (align_mask & 0x8)
 472         cfg->align.horizontal = VOUT_DISPLAY_ALIGN_BOTTOM;
 473 }
 474
 475 vout_window_t * vout_NewDisplayWindow(vout_thread_t *vout, vout_display_t *vd,
 476                                       const vout_window_cfg_t *cfg)
 477 {
 478     VLC_UNUSED(vd);
 479     vout_window_cfg_t cfg_override = *cfg;
 480
 481     if (!var_InheritBool( vout, "embedded-video"))
 482         cfg_override.is_standalone = true;
 483
 484     if (vout->p->window.is_unused && vout->p->window.object) {
 485         assert(!vout->p->splitter_name);
 486         if (!cfg_override.is_standalone == !vout->p->window.cfg.is_standalone &&
 487             cfg_override.type           == vout->p->window.cfg.type) {
 488             /* Reuse the stored window */
 489             msg_Dbg(vout, "Reusing previous vout window");
 490             vout_window_t *window = vout->p->window.object;
 491             if (cfg_override.width  != vout->p->window.cfg.width ||
 492                 cfg_override.height != vout->p->window.cfg.height)
 493                 vout_window_SetSize(window,
 494                                     cfg_override.width, cfg_override.height);
 495             vout->p->window.is_unused = false;
 496             vout->p->window.cfg       = cfg_override;
 497             return window;
 498         }
 499
 500         vout_window_Delete(vout->p->window.object);
 501         vout->p->window.is_unused = true;
 502         vout->p->window.object    = NULL;
 503     }
 504
 505     vout_window_t *window = vout_window_New(VLC_OBJECT(vout), NULL,
 506                                             &cfg_override);
 507     if (!window)
 508         return NULL;
 509     if (!vout->p->splitter_name) {
 510         vout->p->window.is_unused = false;
 511         vout->p->window.cfg       = cfg_override;
 512         vout->p->window.object    = window;
 513     }
 514     return window;
 515 }
 516
 517 void vout_DeleteDisplayWindow(vout_thread_t *vout, vout_display_t *vd,
 518                               vout_window_t *window)
 519 {
 520     VLC_UNUSED(vd);
 521     if (!vout->p->window.is_unused && vout->p->window.object == window) {
 522         vout->p->window.is_unused = true;
 523     } else if (vout->p->window.is_unused && vout->p->window.object && !window) {
 524         vout_window_Delete(vout->p->window.object);
 525         vout->p->window.is_unused = true;
 526         vout->p->window.object    = NULL;
 527     } else if (window) {
 528         vout_window_Delete(window);
 529     }
 530 }
 531
 532 /* */
 533 static picture_t *VoutVideoFilterNewPicture(filter_t *filter)
 534 {
 535     vout_thread_t *vout = (vout_thread_t*)filter->p_owner;
 536     return picture_pool_Get(vout->p->private_pool);
 537 }
 538 static void VoutVideoFilterDelPicture(filter_t *filter, picture_t *picture)
 539 {
 540     VLC_UNUSED(filter);
 541     picture_Release(picture);
 542 }
 543 static int VoutVideoFilterAllocationSetup(filter_t *filter, void *data)
 544 {
 545     filter->pf_video_buffer_new = VoutVideoFilterNewPicture;
 546     filter->pf_video_buffer_del = VoutVideoFilterDelPicture;
 547     filter->p_owner             = data; /* vout */
 548     return VLC_SUCCESS;
 549 }
 550
 551 /* */
 552 static int ThreadDisplayPicture(vout_thread_t *vout,
 553                                 bool now, mtime_t *deadline)
 554 {
 555     vout_display_t *vd = vout->p->display.vd;
 556     int displayed_count = 0;
 557     int lost_count = 0;
 558
 559     for (;;) {
 560         const mtime_t date = mdate();
 561         const bool is_paused = vout->p->pause.is_on;
 562         bool redisplay = is_paused && !now && vout->p->displayed.decoded;
 563         bool is_forced;
 564
 565         /* FIXME/XXX we must redisplay the last decoded picture (because
 566          * of potential vout updated, or filters update or SPU update)
 567          * For now a high update period is needed but it coulmd be removed
 568          * if and only if:
 569          * - vout module emits events from theselves.
 570          * - *and* SPU is modified to emit an event or a deadline when needed.
 571          *
 572          * So it will be done latter.
 573          */
 574         if (!redisplay) {
 575             picture_t *peek = picture_fifo_Peek(vout->p->decoder_fifo);
 576             if (peek) {
 577                 is_forced = peek->b_force || is_paused || now;
 578                 *deadline = (is_forced ? date : peek->date) - vout_chrono_GetHigh(&vout->p->render);
 579                 picture_Release(peek);
 580             } else {
 581                 redisplay = true;
 582             }
 583         }
 584         if (redisplay) {
 585              /* FIXME a better way for this delay is needed */
 586             const mtime_t date_update = vout->p->displayed.date + VOUT_REDISPLAY_DELAY;
 587             if (date_update > date || !vout->p->displayed.decoded) {
 588                 *deadline = vout->p->displayed.decoded ? date_update : VLC_TS_INVALID;
 589                 break;
 590             }
 591             /* */
 592             is_forced = true;
 593             *deadline = date - vout_chrono_GetHigh(&vout->p->render);
 594         }
 595         if (*deadline > VOUT_MWAIT_TOLERANCE)
 596             *deadline -= VOUT_MWAIT_TOLERANCE;
 597
 598         /* If we are too early and can wait, do it */
 599         if (date < *deadline && !now)
 600             break;
 601
 602         picture_t *decoded;
 603         if (redisplay) {
 604             decoded = vout->p->displayed.decoded;
 605             vout->p->displayed.decoded = NULL;
 606         } else {
 607             decoded = picture_fifo_Pop(vout->p->decoder_fifo);
 608             assert(decoded);
 609             if (!is_forced && !vout->p->is_late_dropped) {
 610                 const mtime_t predicted = date + vout_chrono_GetLow(&vout->p->render);
 611                 const mtime_t late = predicted - decoded->date;
 612                 if (late > 0) {
 613                     msg_Dbg(vout, "picture might be displayed late (missing %d ms)", (int)(late/1000));
 614                     if (late > VOUT_DISPLAY_LATE_THRESHOLD) {
 615                         msg_Warn(vout, "rejected picture because of render time");
 616                         /* TODO */
 617                         picture_Release(decoded);
 618                         lost_count++;
 619                         break;
 620                     }
 621                 }
 622             }
 623
 624             vout->p->displayed.is_interlaced = !decoded->b_progressive;
 625             vout->p->displayed.qtype         = decoded->i_qtype;
 626         }
 627         vout->p->displayed.timestamp = decoded->date;
 628
 629         /* */
 630         if (vout->p->displayed.decoded)
 631             picture_Release(vout->p->displayed.decoded);
 632         picture_Hold(decoded);
 633         vout->p->displayed.decoded = decoded;
 634
 635         /* */
 636         vout_chrono_Start(&vout->p->render);
 637
 638         picture_t *filtered = NULL;
 639         if (decoded) {
 640             vlc_mutex_lock(&vout->p->vfilter_lock);
 641             filtered = filter_chain_VideoFilter(vout->p->vfilter_chain, decoded);
 642             //assert(filtered == decoded); // TODO implement
 643             vlc_mutex_unlock(&vout->p->vfilter_lock);
 644             if (!filtered)
 645                 continue;
 646         }
 647
 648         /*
 649          * Check for subpictures to display
 650          */
 651         const bool do_snapshot = vout_snapshot_IsRequested(&vout->p->snapshot);
 652         mtime_t spu_render_time = is_forced ? mdate() : filtered->date;
 653         if (vout->p->pause.is_on)
 654             spu_render_time = vout->p->pause.date;
 655         else
 656             spu_render_time = filtered->date > 1 ? filtered->date : mdate();
 657
 658         subpicture_t *subpic = spu_SortSubpictures(vout->p->p_spu,
 659                                                    spu_render_time,
 660                                                    do_snapshot);
 661         /*
 662          * Perform rendering
 663          *
 664          * We have to:
 665          * - be sure to end up with a direct buffer.
 666          * - blend subtitles, and in a fast access buffer
 667          */
 668         picture_t *direct = NULL;
 669         if (filtered &&
 670             (vout->p->decoder_pool != vout->p->display_pool || subpic)) {
 671             picture_t *render;
 672             if (vout->p->is_decoder_pool_slow)
 673                 render = picture_NewFromFormat(&vd->source);
 674             else if (vout->p->decoder_pool != vout->p->display_pool)
 675                 render = picture_pool_Get(vout->p->display_pool);
 676             else
 677                 render = picture_pool_Get(vout->p->private_pool);
 678
 679             if (render) {
 680                 picture_Copy(render, filtered);
 681
 682                 spu_RenderSubpictures(vout->p->p_spu,
 683                                       render, &vd->source,
 684                                       subpic, &vd->source, spu_render_time);
 685             }
 686             if (vout->p->is_decoder_pool_slow) {
 687                 direct = picture_pool_Get(vout->p->display_pool);
 688                 if (direct)
 689                     picture_Copy(direct, render);
 690                 picture_Release(render);
 691
 692             } else {
 693                 direct = render;
 694             }
 695             picture_Release(filtered);
 696             filtered = NULL;
 697         } else {
 698             direct = filtered;
 699         }
 700
 701         /*
 702          * Take a snapshot if requested
 703          */
 704         if (direct && do_snapshot)
 705             vout_snapshot_Set(&vout->p->snapshot, &vd->source, direct);
 706
 707         /* Render the direct buffer returned by vout_RenderPicture */
 708         if (direct) {
 709             vout_RenderWrapper(vout, direct);
 710
 711             vout_chrono_Stop(&vout->p->render);
 712 #if 0
 713             {
 714             static int i = 0;
 715             if (((i++)%10) == 0)
 716                 msg_Info(vout, "render: avg %d ms var %d ms",
 717                          (int)(vout->p->render.avg/1000), (int)(vout->p->render.var/1000));
 718             }
 719 #endif
 720         }
 721
 722         /* Wait the real date (for rendering jitter) */
 723         if (!is_forced)
 724             mwait(decoded->date);
 725
 726         /* Display the direct buffer returned by vout_RenderPicture */
 727         vout->p->displayed.date = mdate();
 728         if (direct)
 729             vout_DisplayWrapper(vout, direct);
 730
 731         displayed_count++;
 732         break;
 733     }
 734
 735     vout_statistic_Update(&vout->p->statistic, displayed_count, lost_count);
 736     if (displayed_count <= 0)
 737         return VLC_EGENERIC;
 738     return VLC_SUCCESS;
 739 }
 740
 741 static void ThreadManage(vout_thread_t *vout,
 742                          mtime_t *deadline,
 743                          vout_interlacing_support_t *interlacing,
 744                          vout_postprocessing_support_t *postprocessing)
 745 {
 746     vlc_mutex_lock(&vout->p->picture_lock);
 747
 748     *deadline = VLC_TS_INVALID;
 749     ThreadDisplayPicture(vout, false, deadline);
 750
 751     const int  picture_qtype      = vout->p->displayed.qtype;
 752     const bool picture_interlaced = vout->p->displayed.is_interlaced;
 753
 754     vlc_mutex_unlock(&vout->p->picture_lock);
 755
 756     /* Post processing */
 757     vout_SetPostProcessingState(vout, postprocessing, picture_qtype);
 758
 759     /* Deinterlacing */
 760     vout_SetInterlacingState(vout, interlacing, picture_interlaced);
 761
 762     vout_ManageWrapper(vout);
 763 }
 764
 765 static void ThreadDisplaySubpicture(vout_thread_t *vout,
 766                                     subpicture_t *subpicture)
 767 {
 768     spu_DisplaySubpicture(vout->p->p_spu, subpicture);
 769 }
 770
 771 static void ThreadRegisterSubpicture(vout_thread_t *vout, int *channel)
 772 {
 773     *channel = spu_RegisterChannel(vout->p->p_spu);
 774 }
 775
 776 static void ThreadFlushSubpicture(vout_thread_t *vout, int channel)
 777 {
 778     spu_ClearChannel(vout->p->p_spu, channel);
 779 }
 780
 781 static void ThreadDisplayOsdTitle(vout_thread_t *vout, const char *string)
 782 {
 783     if (!vout->p->title.show)
 784         return;
 785
 786     vout_OSDText(vout, SPU_DEFAULT_CHANNEL,
 787                  vout->p->title.position, INT64_C(1000) * vout->p->title.timeout,
 788                  string);
 789 }
 790
 791 static void ThreadChangeFilters(vout_thread_t *vout, const char *filters)
 792 {
 793     es_format_t fmt;
 794     es_format_Init(&fmt, VIDEO_ES, vout->p->original.i_chroma);
 795     fmt.video = vout->p->original;
 796
 797     vlc_mutex_lock(&vout->p->vfilter_lock);
 798
 799     filter_chain_Reset(vout->p->vfilter_chain, &fmt, &fmt);
 800     if (filter_chain_AppendFromString(vout->p->vfilter_chain,
 801                                       filters) < 0)
 802         msg_Err(vout, "Video filter chain creation failed");
 803
 804     vlc_mutex_unlock(&vout->p->vfilter_lock);
 805 }
 806
 807 static void ThreadChangeSubFilters(vout_thread_t *vout, const char *filters)
 808 {
 809     spu_ChangeFilters(vout->p->p_spu, filters);
 810 }
 811
 812 static void ThreadChangePause(vout_thread_t *vout, bool is_paused, mtime_t date)
 813 {
 814     assert(!vout->p->pause.is_on || !is_paused);
 815
 816     if (vout->p->pause.is_on) {
 817         const mtime_t duration = date - vout->p->pause.date;
 818
 819         if (vout->p->step.timestamp > VLC_TS_INVALID)
 820             vout->p->step.timestamp += duration;
 821         if (vout->p->step.last > VLC_TS_INVALID)
 822             vout->p->step.last += duration;
 823         picture_fifo_OffsetDate(vout->p->decoder_fifo, duration);
 824         if (vout->p->displayed.decoded)
 825             vout->p->displayed.decoded->date += duration;
 826
 827         spu_OffsetSubtitleDate(vout->p->p_spu, duration);
 828     } else {
 829         vout->p->step.timestamp = VLC_TS_INVALID;
 830         vout->p->step.last      = VLC_TS_INVALID;
 831     }
 832     vout->p->pause.is_on = is_paused;
 833     vout->p->pause.date  = date;
 834 }
 835
 836 static void ThreadFlush(vout_thread_t *vout, bool below, mtime_t date)
 837 {
 838     vout->p->step.timestamp = VLC_TS_INVALID;
 839     vout->p->step.last      = VLC_TS_INVALID;
 840
 841     picture_t *last = vout->p->displayed.decoded;
 842     if (last) {
 843         if (( below && last->date <= date) ||
 844             (!below && last->date >= date)) {
 845             picture_Release(last);
 846
 847             vout->p->displayed.decoded   = NULL;
 848             vout->p->displayed.date      = VLC_TS_INVALID;
 849             vout->p->displayed.timestamp = VLC_TS_INVALID;
 850         }
 851     }
 852     picture_fifo_Flush(vout->p->decoder_fifo, date, below);
 853 }
 854
 855 static void ThreadReset(vout_thread_t *vout)
 856 {
 857     ThreadFlush(vout, true, INT64_MAX);
 858     if (vout->p->decoder_pool)
 859         picture_pool_NonEmpty(vout->p->decoder_pool, true);
 860     vout->p->pause.is_on = false;
 861     vout->p->pause.date  = mdate();
 862 }
 863
 864 static void ThreadStep(vout_thread_t *vout, mtime_t *duration)
 865 {
 866     *duration = 0;
 867
 868     if (vout->p->step.last <= VLC_TS_INVALID)
 869         vout->p->step.last = vout->p->displayed.timestamp;
 870
 871     mtime_t dummy;
 872     if (ThreadDisplayPicture(vout, true, &dummy))
 873         return;
 874
 875     vout->p->step.timestamp = vout->p->displayed.timestamp;
 876
 877     if (vout->p->step.last > VLC_TS_INVALID &&
 878         vout->p->step.timestamp > vout->p->step.last) {
 879         *duration = vout->p->step.timestamp - vout->p->step.last;
 880         vout->p->step.last = vout->p->step.timestamp;
 881         /* TODO advance subpicture by the duration ... */
 882     }
 883 }
 884
 885 static void ThreadChangeFullscreen(vout_thread_t *vout, bool fullscreen)
 886 {
 887     /* FIXME not sure setting "fullscreen" is good ... */
 888     var_SetBool(vout, "fullscreen", fullscreen);
 889     vout_SetDisplayFullscreen(vout->p->display.vd, fullscreen);
 890 }
 891
 892 static void ThreadChangeOnTop(vout_thread_t *vout, bool is_on_top)
 893 {
 894     vout_SetWindowState(vout->p->display.vd,
 895                         is_on_top ? VOUT_WINDOW_STATE_ABOVE :
 896                                     VOUT_WINDOW_STATE_NORMAL);
 897 }
 898
 899 static void ThreadChangeDisplayFilled(vout_thread_t *vout, bool is_filled)
 900 {
 901     vout_SetDisplayFilled(vout->p->display.vd, is_filled);
 902 }
 903
 904 static void ThreadChangeZoom(vout_thread_t *vout, int num, int den)
 905 {
 906     if (num * 10 < den) {
 907         num = den;
 908         den *= 10;
 909     } else if (num > den * 10) {
 910         num = den * 10;
 911     }
 912
 913     vout_SetDisplayZoom(vout->p->display.vd, num, den);
 914 }
 915
 916 static void ThreadChangeAspectRatio(vout_thread_t *vout,
 917                                     unsigned num, unsigned den)
 918 {
 919     const video_format_t *source = &vout->p->original;
 920
 921     if (num > 0 && den > 0) {
 922         num *= source->i_visible_height;
 923         den *= source->i_visible_width;
 924         vlc_ureduce(&num, &den, num, den, 0);
 925     }
 926     vout_SetDisplayAspect(vout->p->display.vd, num, den);
 927 }
 928
 929
 930 static void ThreadExecuteCropWindow(vout_thread_t *vout,
 931                                     unsigned crop_num, unsigned crop_den,
 932                                     unsigned x, unsigned y,
 933                                     unsigned width, unsigned height)
 934 {
 935     const video_format_t *source = &vout->p->original;
 936
 937     vout_SetDisplayCrop(vout->p->display.vd,
 938                         crop_num, crop_den,
 939                         source->i_x_offset + x,
 940                         source->i_y_offset + y,
 941                         width, height);
 942 }
 943 static void ThreadExecuteCropBorder(vout_thread_t *vout,
 944                                     unsigned left, unsigned top,
 945                                     unsigned right, unsigned bottom)
 946 {
 947     const video_format_t *source = &vout->p->original;
 948     ThreadExecuteCropWindow(vout, 0, 0,
 949                             left,
 950                             top,
 951                             /* At worst, it becomes < 0 (but unsigned) and will be rejected */
 952                             source->i_visible_width  - (left + right),
 953                             source->i_visible_height - (top  + bottom));
 954 }
 955
 956 static void ThreadExecuteCropRatio(vout_thread_t *vout,
 957                                    unsigned num, unsigned den)
 958 {
 959     const video_format_t *source = &vout->p->original;
 960     ThreadExecuteCropWindow(vout, num, den,
 961                             0, 0,
 962                             source->i_visible_width,
 963                             source->i_visible_height);
 964 }
 965
 966 static int ThreadStart(vout_thread_t *vout, const vout_display_state_t *state)
 967 {
 968     vlc_mouse_Init(&vout->p->mouse);
 969     vout->p->decoder_fifo = picture_fifo_New();
 970     vout->p->decoder_pool = NULL;
 971     vout->p->display_pool = NULL;
 972     vout->p->private_pool = NULL;
 973
 974     vout->p->vfilter_chain =
 975         filter_chain_New( vout, "video filter2", false,
 976                           VoutVideoFilterAllocationSetup, NULL, vout);
 977
 978     vout_display_state_t state_default;
 979     if (!state) {
 980         VoutGetDisplayCfg(vout, &state_default.cfg, vout->p->display.title);
 981         state_default.wm_state = var_CreateGetBool(vout, "video-on-top") ? VOUT_WINDOW_STATE_ABOVE :
 982                                                                            VOUT_WINDOW_STATE_NORMAL;
 983         state_default.sar.num = 0;
 984         state_default.sar.den = 0;
 985
 986         state = &state_default;
 987     }
 988
 989     if (vout_OpenWrapper(vout, vout->p->splitter_name, state))
 990         return VLC_EGENERIC;
 991     if (vout_InitWrapper(vout))
 992         return VLC_EGENERIC;
 993     assert(vout->p->decoder_pool);
 994
 995     vout->p->displayed.decoded       = NULL;
 996     vout->p->displayed.date          = VLC_TS_INVALID;
 997     vout->p->displayed.decoded       = NULL;
 998     vout->p->displayed.timestamp     = VLC_TS_INVALID;
 999     vout->p->displayed.qtype         = QTYPE_NONE;
1000     vout->p->displayed.is_interlaced = false;
1001
1002     vout->p->step.last               = VLC_TS_INVALID;
1003     vout->p->step.timestamp          = VLC_TS_INVALID;
1004
1005     video_format_Print(VLC_OBJECT(vout), "original format", &vout->p->original);
1006     return VLC_SUCCESS;
1007 }
1008
1009 static void ThreadStop(vout_thread_t *vout, vout_display_state_t *state)
1010 {
1011     /* Destroy the video filters2 */
1012     filter_chain_Delete(vout->p->vfilter_chain);
1013
1014     /* Destroy translation tables */
1015     if (vout->p->display.vd) {
1016         if (vout->p->decoder_pool) {
1017             ThreadFlush(vout, true, INT64_MAX);
1018             vout_EndWrapper(vout);
1019         }
1020         vout_CloseWrapper(vout, state);
1021     }
1022
1023     if (vout->p->decoder_fifo)
1024         picture_fifo_Delete(vout->p->decoder_fifo);
1025     assert(!vout->p->decoder_pool);
1026 }
1027
1028 static void ThreadInit(vout_thread_t *vout)
1029 {
1030     vout->p->window.is_unused = true;
1031     vout->p->window.object    = NULL;
1032     vout->p->dead             = false;
1033     vout->p->is_late_dropped  = var_InheritBool(vout, "drop-late-frames");
1034     vout->p->pause.is_on      = false;
1035     vout->p->pause.date       = VLC_TS_INVALID;
1036
1037     vout_chrono_Init(&vout->p->render, 5, 10000); /* Arbitrary initial time */
1038 }
1039
1040 static void ThreadClean(vout_thread_t *vout)
1041 {
1042     if (vout->p->window.object) {
1043         assert(vout->p->window.is_unused);
1044         vout_window_Delete(vout->p->window.object);
1045     }
1046     vout_chrono_Clean(&vout->p->render);
1047     vout->p->dead = true;
1048     vout_control_Dead(&vout->p->control);
1049 }
1050
1051 static int ThreadReinit(vout_thread_t *vout,
1052                         const vout_configuration_t *cfg)
1053 {
1054     video_format_t original;
1055     if (VoutValidateFormat(&original, cfg->fmt)) {
1056         ThreadStop(vout, NULL);
1057         ThreadClean(vout);
1058         return VLC_EGENERIC;
1059     }
1060     if (video_format_IsSimilar(&original, &vout->p->original)) {
1061         if (cfg->dpb_size <= vout->p->dpb_size)
1062             return VLC_SUCCESS;
1063         msg_Warn(vout, "DPB need to be increased");
1064     }
1065
1066     vout_display_state_t state;
1067     memset(&state, 0, sizeof(state));
1068
1069     ThreadStop(vout, &state);
1070
1071     if (!state.cfg.is_fullscreen) {
1072         state.cfg.display.width  = 0;
1073         state.cfg.display.height = 0;
1074     }
1075     state.sar.num = 0;
1076     state.sar.den = 0;
1077     /* FIXME current vout "variables" are not in sync here anymore
1078      * and I am not sure what to do */
1079
1080     vout->p->original = original;
1081     vout->p->dpb_size = cfg->dpb_size;
1082     if (ThreadStart(vout, &state)) {
1083         ThreadClean(vout);
1084         return VLC_EGENERIC;
1085     }
1086     return VLC_SUCCESS;
1087 }
1088
1089 /*****************************************************************************
1090  * Thread: video output thread
1091  *****************************************************************************
1092  * Video output thread. This function does only returns when the thread is
1093  * terminated. It handles the pictures arriving in the video heap and the
1094  * display device events.
1095  *****************************************************************************/
1096 static void *Thread(void *object)
1097 {
1098     vout_thread_t *vout = object;
1099
1100     vout_interlacing_support_t interlacing = {
1101         .is_interlaced = false,
1102         .date = mdate(),
1103     };
1104     vout_postprocessing_support_t postprocessing = {
1105         .qtype = QTYPE_NONE,
1106     };
1107
1108     mtime_t deadline = VLC_TS_INVALID;
1109     for (;;) {
1110         vout_control_cmd_t cmd;
1111
1112         /* FIXME remove thoses ugly timeouts
1113          */
1114         while (!vout_control_Pop(&vout->p->control, &cmd, deadline, 100000)) {
1115             switch(cmd.type) {
1116             case VOUT_CONTROL_INIT:
1117                 ThreadInit(vout);
1118                 if (ThreadStart(vout, NULL)) {
1119                     ThreadStop(vout, NULL);
1120                     ThreadClean(vout);
1121                     return NULL;
1122                 }
1123                 break;
1124             case VOUT_CONTROL_CLEAN:
1125                 ThreadStop(vout, NULL);
1126                 ThreadClean(vout);
1127                 return NULL;
1128             case VOUT_CONTROL_REINIT:
1129                 if (ThreadReinit(vout, cmd.u.cfg))
1130                     return NULL;
1131                 break;
1132             case VOUT_CONTROL_SUBPICTURE:
1133                 ThreadDisplaySubpicture(vout, cmd.u.subpicture);
1134                 cmd.u.subpicture = NULL;
1135                 break;
1136             case VOUT_CONTROL_FLUSH_SUBPICTURE:
1137                 ThreadFlushSubpicture(vout, cmd.u.integer);
1138                 break;
1139             case VOUT_CONTROL_REGISTER_SUBPICTURE:
1140                 ThreadRegisterSubpicture(vout, cmd.u.integer_ptr);
1141                 break;
1142             case VOUT_CONTROL_OSD_TITLE:
1143                 ThreadDisplayOsdTitle(vout, cmd.u.string);
1144                 break;
1145             case VOUT_CONTROL_CHANGE_FILTERS:
1146                 ThreadChangeFilters(vout, cmd.u.string);
1147                 break;
1148             case VOUT_CONTROL_CHANGE_SUB_FILTERS:
1149                 ThreadChangeSubFilters(vout, cmd.u.string);
1150                 break;
1151             case VOUT_CONTROL_PAUSE:
1152                 ThreadChangePause(vout, cmd.u.pause.is_on, cmd.u.pause.date);
1153                 break;
1154             case VOUT_CONTROL_FLUSH:
1155                 ThreadFlush(vout, false, cmd.u.time);
1156                 break;
1157             case VOUT_CONTROL_RESET:
1158                 ThreadReset(vout);
1159                 break;
1160             case VOUT_CONTROL_STEP:
1161                 ThreadStep(vout, cmd.u.time_ptr);
1162                 break;
1163             case VOUT_CONTROL_FULLSCREEN:
1164                 ThreadChangeFullscreen(vout, cmd.u.boolean);
1165                 break;
1166             case VOUT_CONTROL_ON_TOP:
1167                 ThreadChangeOnTop(vout, cmd.u.boolean);
1168                 break;
1169             case VOUT_CONTROL_DISPLAY_FILLED:
1170                 ThreadChangeDisplayFilled(vout, cmd.u.boolean);
1171                 break;
1172             case VOUT_CONTROL_ZOOM:
1173                 ThreadChangeZoom(vout, cmd.u.pair.a, cmd.u.pair.b);
1174                 break;
1175             case VOUT_CONTROL_ASPECT_RATIO:
1176                 ThreadChangeAspectRatio(vout, cmd.u.pair.a, cmd.u.pair.b);
1177                 break;
1178            case VOUT_CONTROL_CROP_RATIO:
1179                 ThreadExecuteCropRatio(vout, cmd.u.pair.a, cmd.u.pair.b);
1180                 break;
1181             case VOUT_CONTROL_CROP_WINDOW:
1182                 ThreadExecuteCropWindow(vout, 0, 0,
1183                                         cmd.u.window.x, cmd.u.window.y,
1184                                         cmd.u.window.width, cmd.u.window.height);
1185                 break;
1186             case VOUT_CONTROL_CROP_BORDER:
1187                 ThreadExecuteCropBorder(vout,
1188                                         cmd.u.border.left,  cmd.u.border.top,
1189                                         cmd.u.border.right, cmd.u.border.bottom);
1190                 break;
1191             default:
1192                 break;
1193             }
1194             vout_control_cmd_Clean(&cmd);
1195         }
1196
1197         ThreadManage(vout, &deadline, &interlacing, &postprocessing);
1198     }
1199 }
1200