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 /*****************************************************************************
  96  * vout_Request: find a video output thread, create one, or destroy one.
  97  *****************************************************************************
  98  * This function looks for a video output thread matching the current
  99  * properties. If not found, it spawns a new one.
 100  *****************************************************************************/
 101 vout_thread_t *(vout_Request)(vlc_object_t *object, vout_thread_t *vout,
 102                               const video_format_t *fmt)
 103 {
 104     if (!fmt) {
 105         if (vout)
 106             vout_CloseAndRelease(vout);
 107         return NULL;
 108     }
 109
 110     /* If a vout is provided, try reusing it */
 111     if (vout) {
 112         spu_Attach(vout->p->p_spu, VLC_OBJECT(vout), false);
 113         vlc_object_detach(vout);
 114         vlc_object_attach(vout, object);
 115         spu_Attach(vout->p->p_spu, VLC_OBJECT(vout), true);
 116
 117         vout_control_cmd_t cmd;
 118         vout_control_cmd_Init(&cmd, VOUT_CONTROL_REINIT);
 119         cmd.u.reinit.fmt = fmt;
 120
 121         vout_control_Push(&vout->p->control, &cmd);
 122         vout_control_WaitEmpty(&vout->p->control);
 123         if (!vout->p->dead) {
 124             msg_Dbg(object, "reusing provided vout");
 125             return vout;
 126         }
 127         vout_CloseAndRelease(vout);
 128
 129         msg_Warn(object, "cannot reuse provided vout");
 130     }
 131     return vout_Create(object, fmt);
 132 }
 133
 134 /*****************************************************************************
 135  * vout_Create: creates a new video output thread
 136  *****************************************************************************
 137  * This function creates a new video output thread, and returns a pointer
 138  * to its description. On error, it returns NULL.
 139  *****************************************************************************/
 140 vout_thread_t *(vout_Create)(vlc_object_t *object, const video_format_t *fmt)
 141 {
 142     video_format_t original;
 143     if (VoutValidateFormat(&original, fmt))
 144         return NULL;
 145
 146     /* Allocate descriptor */
 147     vout_thread_t *vout = vlc_custom_create(object,
 148                                             sizeof(*vout) + sizeof(*vout->p),
 149                                             VLC_OBJECT_VOUT, "video output");
 150     if (!vout) {
 151         video_format_Clean(&original);
 152         return NULL;
 153     }
 154
 155     /* */
 156     vout->p = (vout_thread_sys_t*)&vout[1];
 157
 158     vout->p->original = original;
 159
 160     vout_control_Init(&vout->p->control);
 161     vout_control_PushVoid(&vout->p->control, VOUT_CONTROL_INIT);
 162
 163     vout_statistic_Init(&vout->p->statistic);
 164     vout->p->i_par_num =
 165     vout->p->i_par_den = 1;
 166
 167     vout_snapshot_Init(&vout->p->snapshot);
 168
 169     /* Initialize locks */
 170     vlc_mutex_init(&vout->p->picture_lock);
 171     vlc_mutex_init(&vout->p->vfilter_lock);
 172
 173     /* Attach the new object now so we can use var inheritance below */
 174     vlc_object_attach(vout, object);
 175
 176     /* Initialize subpicture unit */
 177     vout->p->p_spu = spu_Create(vout);
 178
 179     /* Take care of some "interface/control" related initialisations */
 180     vout_IntfInit(vout);
 181
 182     /* Get splitter name if present */
 183     char *splitter_name = var_GetNonEmptyString(vout, "vout-filter");
 184     if (splitter_name) {
 185         if (asprintf(&vout->p->splitter_name, "%s,none", splitter_name) < 0)
 186             vout->p->splitter_name = NULL;
 187         free(splitter_name);
 188     } else {
 189         vout->p->splitter_name = NULL;
 190     }
 191
 192     /* */
 193     vout_InitInterlacingSupport(vout, vout->p->displayed.is_interlaced);
 194
 195     /* */
 196     vlc_object_set_destructor(vout, VoutDestructor);
 197
 198     /* */
 199     if (vlc_clone(&vout->p->thread, Thread, vout,
 200                   VLC_THREAD_PRIORITY_OUTPUT)) {
 201         vlc_object_release(vout);
 202         return NULL;
 203     }
 204     spu_Attach(vout->p->p_spu, VLC_OBJECT(vout), true);
 205
 206     vout_control_WaitEmpty(&vout->p->control);
 207
 208     if (vout->p->dead) {
 209         msg_Err(vout, "video output creation failed");
 210         vout_CloseAndRelease(vout);
 211         return NULL;
 212     }
 213
 214     return vout;
 215 }
 216
 217 /*****************************************************************************
 218  * vout_Close: Close a vout created by vout_Create.
 219  *****************************************************************************
 220  * You HAVE to call it on vout created by vout_Create before vlc_object_release.
 221  * You should NEVER call it on vout not obtained through vout_Create
 222  * (like with vout_Request or vlc_object_find.)
 223  * You can use vout_CloseAndRelease() as a convenience method.
 224  *****************************************************************************/
 225 void vout_Close(vout_thread_t *vout)
 226 {
 227     assert(vout);
 228
 229     spu_Attach(vout->p->p_spu, VLC_OBJECT(vout), false);
 230     vlc_object_detach(vout->p->p_spu);
 231
 232     vout_snapshot_End(&vout->p->snapshot);
 233
 234     vout_control_PushVoid(&vout->p->control, VOUT_CONTROL_CLEAN);
 235     vlc_join(vout->p->thread, NULL);
 236 }
 237
 238 /* */
 239 static void VoutDestructor(vlc_object_t *object)
 240 {
 241     vout_thread_t *vout = (vout_thread_t *)object;
 242
 243     /* Make sure the vout was stopped first */
 244     //assert(!vout->p_module);
 245
 246     free(vout->p->splitter_name);
 247
 248     /* */
 249     spu_Destroy(vout->p->p_spu);
 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     spu_DisplaySubpicture(vout->p->p_spu, subpic);
 352 }
 353 int vout_RegisterSubpictureChannel( vout_thread_t *vout )
 354 {
 355     return spu_RegisterChannel(vout->p->p_spu);
 356 }
 357 void vout_FlushSubpictureChannel( vout_thread_t *vout, int channel )
 358 {
 359     spu_ClearChannel(vout->p->p_spu, channel);
 360 }
 361
 362 /* vout_Control* are usable by anyone at anytime */
 363 void vout_ControlChangeFullscreen(vout_thread_t *vout, bool fullscreen)
 364 {
 365     vout_control_PushBool(&vout->p->control, VOUT_CONTROL_FULLSCREEN,
 366                           fullscreen);
 367 }
 368 void vout_ControlChangeOnTop(vout_thread_t *vout, bool is_on_top)
 369 {
 370     vout_control_PushBool(&vout->p->control, VOUT_CONTROL_ON_TOP,
 371                           is_on_top);
 372 }
 373 void vout_ControlChangeDisplayFilled(vout_thread_t *vout, bool is_filled)
 374 {
 375     vout_control_PushBool(&vout->p->control, VOUT_CONTROL_DISPLAY_FILLED,
 376                           is_filled);
 377 }
 378 void vout_ControlChangeZoom(vout_thread_t *vout, int num, int den)
 379 {
 380     vout_control_PushPair(&vout->p->control, VOUT_CONTROL_ZOOM,
 381                           num, den);
 382 }
 383 void vout_ControlChangeSampleAspectRatio(vout_thread_t *vout,
 384                                          unsigned num, unsigned den)
 385 {
 386     vout_control_PushPair(&vout->p->control, VOUT_CONTROL_ASPECT_RATIO,
 387                           num, den);
 388 }
 389 void vout_ControlChangeCropRatio(vout_thread_t *vout,
 390                                  unsigned num, unsigned den)
 391 {
 392     vout_control_PushPair(&vout->p->control, VOUT_CONTROL_CROP_RATIO,
 393                           num, den);
 394 }
 395 void vout_ControlChangeCropWindow(vout_thread_t *vout,
 396                                   int x, int y, int width, int height)
 397 {
 398     vout_control_cmd_t cmd;
 399     vout_control_cmd_Init(&cmd, VOUT_CONTROL_CROP_WINDOW);
 400     cmd.u.window.x      = x;
 401     cmd.u.window.y      = y;
 402     cmd.u.window.width  = width;
 403     cmd.u.window.height = height;
 404
 405     vout_control_Push(&vout->p->control, &cmd);
 406 }
 407 void vout_ControlChangeCropBorder(vout_thread_t *vout,
 408                                   int left, int top, int right, int bottom)
 409 {
 410     vout_control_cmd_t cmd;
 411     vout_control_cmd_Init(&cmd, VOUT_CONTROL_CROP_BORDER);
 412     cmd.u.border.left   = left;
 413     cmd.u.border.top    = top;
 414     cmd.u.border.right  = right;
 415     cmd.u.border.bottom = bottom;
 416
 417     vout_control_Push(&vout->p->control, &cmd);
 418 }
 419 void vout_ControlChangeFilters(vout_thread_t *vout, const char *filters)
 420 {
 421     vout_control_PushString(&vout->p->control, VOUT_CONTROL_CHANGE_FILTERS,
 422                             filters);
 423 }
 424 void vout_ControlChangeSubFilters(vout_thread_t *vout, const char *filters)
 425 {
 426     vout_control_PushString(&vout->p->control, VOUT_CONTROL_CHANGE_SUB_FILTERS,
 427                             filters);
 428 }
 429
 430 /* */
 431 static picture_t *VoutVideoFilterNewPicture(filter_t *filter)
 432 {
 433     vout_thread_t *vout = (vout_thread_t*)filter->p_owner;
 434     return picture_pool_Get(vout->p->private_pool);
 435 }
 436 static void VoutVideoFilterDelPicture(filter_t *filter, picture_t *picture)
 437 {
 438     VLC_UNUSED(filter);
 439     picture_Release(picture);
 440 }
 441 static int VoutVideoFilterAllocationSetup(filter_t *filter, void *data)
 442 {
 443     filter->pf_video_buffer_new = VoutVideoFilterNewPicture;
 444     filter->pf_video_buffer_del = VoutVideoFilterDelPicture;
 445     filter->p_owner             = data; /* vout */
 446     return VLC_SUCCESS;
 447 }
 448
 449 /* */
 450 static int ThreadDisplayPicture(vout_thread_t *vout,
 451                                 bool now, mtime_t *deadline)
 452 {
 453     vout_display_t *vd = vout->p->display.vd;
 454     int displayed_count = 0;
 455     int lost_count = 0;
 456
 457     for (;;) {
 458         const mtime_t date = mdate();
 459         const bool is_paused = vout->p->pause.is_on;
 460         bool redisplay = is_paused && !now && vout->p->displayed.decoded;
 461         bool is_forced;
 462
 463         /* FIXME/XXX we must redisplay the last decoded picture (because
 464          * of potential vout updated, or filters update or SPU update)
 465          * For now a high update period is needed but it coulmd be removed
 466          * if and only if:
 467          * - vout module emits events from theselves.
 468          * - *and* SPU is modified to emit an event or a deadline when needed.
 469          *
 470          * So it will be done latter.
 471          */
 472         if (!redisplay) {
 473             picture_t *peek = picture_fifo_Peek(vout->p->decoder_fifo);
 474             if (peek) {
 475                 is_forced = peek->b_force || is_paused || now;
 476                 *deadline = (is_forced ? date : peek->date) - vout_chrono_GetHigh(&vout->p->render);
 477                 picture_Release(peek);
 478             } else {
 479                 redisplay = true;
 480             }
 481         }
 482         if (redisplay) {
 483              /* FIXME a better way for this delay is needed */
 484             const mtime_t date_update = vout->p->displayed.date + VOUT_REDISPLAY_DELAY;
 485             if (date_update > date || !vout->p->displayed.decoded) {
 486                 *deadline = vout->p->displayed.decoded ? date_update : VLC_TS_INVALID;
 487                 break;
 488             }
 489             /* */
 490             is_forced = true;
 491             *deadline = date - vout_chrono_GetHigh(&vout->p->render);
 492         }
 493         if (*deadline > VOUT_MWAIT_TOLERANCE)
 494             *deadline -= VOUT_MWAIT_TOLERANCE;
 495
 496         /* If we are too early and can wait, do it */
 497         if (date < *deadline && !now)
 498             break;
 499
 500         picture_t *decoded;
 501         if (redisplay) {
 502             decoded = vout->p->displayed.decoded;
 503             vout->p->displayed.decoded = NULL;
 504         } else {
 505             decoded = picture_fifo_Pop(vout->p->decoder_fifo);
 506             assert(decoded);
 507             if (!is_forced && !vout->p->is_late_dropped) {
 508                 const mtime_t predicted = date + vout_chrono_GetLow(&vout->p->render);
 509                 const mtime_t late = predicted - decoded->date;
 510                 if (late > 0) {
 511                     msg_Dbg(vout, "picture might be displayed late (missing %d ms)", (int)(late/1000));
 512                     if (late > VOUT_DISPLAY_LATE_THRESHOLD) {
 513                         msg_Warn(vout, "rejected picture because of render time");
 514                         /* TODO */
 515                         picture_Release(decoded);
 516                         lost_count++;
 517                         break;
 518                     }
 519                 }
 520             }
 521
 522             vout->p->displayed.is_interlaced = !decoded->b_progressive;
 523             vout->p->displayed.qtype         = decoded->i_qtype;
 524         }
 525         vout->p->displayed.timestamp = decoded->date;
 526
 527         /* */
 528         if (vout->p->displayed.decoded)
 529             picture_Release(vout->p->displayed.decoded);
 530         picture_Hold(decoded);
 531         vout->p->displayed.decoded = decoded;
 532
 533         /* */
 534         vout_chrono_Start(&vout->p->render);
 535
 536         picture_t *filtered = NULL;
 537         if (decoded) {
 538             vlc_mutex_lock(&vout->p->vfilter_lock);
 539             filtered = filter_chain_VideoFilter(vout->p->vfilter_chain, decoded);
 540             //assert(filtered == decoded); // TODO implement
 541             vlc_mutex_unlock(&vout->p->vfilter_lock);
 542             if (!filtered)
 543                 continue;
 544         }
 545
 546         /*
 547          * Check for subpictures to display
 548          */
 549         const bool do_snapshot = vout_snapshot_IsRequested(&vout->p->snapshot);
 550         mtime_t spu_render_time = is_forced ? mdate() : filtered->date;
 551         if (vout->p->pause.is_on)
 552             spu_render_time = vout->p->pause.date;
 553         else
 554             spu_render_time = filtered->date > 1 ? filtered->date : mdate();
 555
 556         subpicture_t *subpic = spu_SortSubpictures(vout->p->p_spu,
 557                                                    spu_render_time,
 558                                                    do_snapshot);
 559         /*
 560          * Perform rendering
 561          *
 562          * We have to:
 563          * - be sure to end up with a direct buffer.
 564          * - blend subtitles, and in a fast access buffer
 565          */
 566         picture_t *direct = NULL;
 567         if (filtered &&
 568             (vout->p->decoder_pool != vout->p->display_pool || subpic)) {
 569             picture_t *render;
 570             if (vout->p->is_decoder_pool_slow)
 571                 render = picture_NewFromFormat(&vd->source);
 572             else if (vout->p->decoder_pool != vout->p->display_pool)
 573                 render = picture_pool_Get(vout->p->display_pool);
 574             else
 575                 render = picture_pool_Get(vout->p->private_pool);
 576
 577             if (render) {
 578                 picture_Copy(render, filtered);
 579
 580                 spu_RenderSubpictures(vout->p->p_spu,
 581                                       render, &vd->source,
 582                                       subpic, &vd->source, spu_render_time);
 583             }
 584             if (vout->p->is_decoder_pool_slow) {
 585                 direct = picture_pool_Get(vout->p->display_pool);
 586                 if (direct)
 587                     picture_Copy(direct, render);
 588                 picture_Release(render);
 589
 590             } else {
 591                 direct = render;
 592             }
 593             picture_Release(filtered);
 594             filtered = NULL;
 595         } else {
 596             direct = filtered;
 597         }
 598
 599         /*
 600          * Take a snapshot if requested
 601          */
 602         if (direct && do_snapshot)
 603             vout_snapshot_Set(&vout->p->snapshot, &vd->source, direct);
 604
 605         /* Render the direct buffer returned by vout_RenderPicture */
 606         if (direct) {
 607             vout_RenderWrapper(vout, direct);
 608
 609             vout_chrono_Stop(&vout->p->render);
 610 #if 0
 611             {
 612             static int i = 0;
 613             if (((i++)%10) == 0)
 614                 msg_Info(vout, "render: avg %d ms var %d ms",
 615                          (int)(vout->p->render.avg/1000), (int)(vout->p->render.var/1000));
 616             }
 617 #endif
 618         }
 619
 620         /* Wait the real date (for rendering jitter) */
 621         if (!is_forced)
 622             mwait(decoded->date);
 623
 624         /* Display the direct buffer returned by vout_RenderPicture */
 625         vout->p->displayed.date = mdate();
 626         if (direct)
 627             vout_DisplayWrapper(vout, direct);
 628
 629         displayed_count++;
 630         break;
 631     }
 632
 633     vout_statistic_Update(&vout->p->statistic, displayed_count, lost_count);
 634     if (displayed_count <= 0)
 635         return VLC_EGENERIC;
 636     return VLC_SUCCESS;
 637 }
 638
 639 static void ThreadManage(vout_thread_t *vout,
 640                          mtime_t *deadline,
 641                          vout_interlacing_support_t *interlacing,
 642                          vout_postprocessing_support_t *postprocessing)
 643 {
 644     vlc_mutex_lock(&vout->p->picture_lock);
 645
 646     *deadline = VLC_TS_INVALID;
 647     ThreadDisplayPicture(vout, false, deadline);
 648
 649     const int  picture_qtype      = vout->p->displayed.qtype;
 650     const bool picture_interlaced = vout->p->displayed.is_interlaced;
 651
 652     vlc_mutex_unlock(&vout->p->picture_lock);
 653
 654     /* Post processing */
 655     vout_SetPostProcessingState(vout, postprocessing, picture_qtype);
 656
 657     /* Deinterlacing */
 658     vout_SetInterlacingState(vout, interlacing, picture_interlaced);
 659
 660     vout_ManageWrapper(vout);
 661 }
 662
 663 static void ThreadDisplayOsdTitle(vout_thread_t *vout, const char *string)
 664 {
 665     if (!vout->p->title.show)
 666         return;
 667
 668     vout_OSDText(vout, SPU_DEFAULT_CHANNEL,
 669                  vout->p->title.position, INT64_C(1000) * vout->p->title.timeout,
 670                  string);
 671 }
 672
 673 static void ThreadChangeFilters(vout_thread_t *vout, const char *filters)
 674 {
 675     es_format_t fmt;
 676     es_format_Init(&fmt, VIDEO_ES, vout->p->original.i_chroma);
 677     fmt.video = vout->p->original;
 678
 679     vlc_mutex_lock(&vout->p->vfilter_lock);
 680
 681     filter_chain_Reset(vout->p->vfilter_chain, &fmt, &fmt);
 682     if (filter_chain_AppendFromString(vout->p->vfilter_chain,
 683                                       filters) < 0)
 684         msg_Err(vout, "Video filter chain creation failed");
 685
 686     vlc_mutex_unlock(&vout->p->vfilter_lock);
 687 }
 688
 689 static void ThreadChangeSubFilters(vout_thread_t *vout, const char *filters)
 690 {
 691     spu_ChangeFilters(vout->p->p_spu, filters);
 692 }
 693
 694 static void ThreadChangePause(vout_thread_t *vout, bool is_paused, mtime_t date)
 695 {
 696     assert(!vout->p->pause.is_on || !is_paused);
 697
 698     if (vout->p->pause.is_on) {
 699         const mtime_t duration = date - vout->p->pause.date;
 700
 701         if (vout->p->step.timestamp > VLC_TS_INVALID)
 702             vout->p->step.timestamp += duration;
 703         if (vout->p->step.last > VLC_TS_INVALID)
 704             vout->p->step.last += duration;
 705         picture_fifo_OffsetDate(vout->p->decoder_fifo, duration);
 706         if (vout->p->displayed.decoded)
 707             vout->p->displayed.decoded->date += duration;
 708
 709         spu_OffsetSubtitleDate(vout->p->p_spu, duration);
 710     } else {
 711         vout->p->step.timestamp = VLC_TS_INVALID;
 712         vout->p->step.last      = VLC_TS_INVALID;
 713     }
 714     vout->p->pause.is_on = is_paused;
 715     vout->p->pause.date  = date;
 716 }
 717
 718 static void ThreadFlush(vout_thread_t *vout, bool below, mtime_t date)
 719 {
 720     vout->p->step.timestamp = VLC_TS_INVALID;
 721     vout->p->step.last      = VLC_TS_INVALID;
 722
 723     picture_t *last = vout->p->displayed.decoded;
 724     if (last) {
 725         if (( below && last->date <= date) ||
 726             (!below && last->date >= date)) {
 727             picture_Release(last);
 728
 729             vout->p->displayed.decoded   = NULL;
 730             vout->p->displayed.date      = VLC_TS_INVALID;
 731             vout->p->displayed.timestamp = VLC_TS_INVALID;
 732         }
 733     }
 734     picture_fifo_Flush(vout->p->decoder_fifo, date, below);
 735 }
 736
 737 static void ThreadReset(vout_thread_t *vout)
 738 {
 739     ThreadFlush(vout, true, INT64_MAX);
 740     if (vout->p->decoder_pool)
 741         picture_pool_NonEmpty(vout->p->decoder_pool, true);
 742     vout->p->pause.is_on = false;
 743     vout->p->pause.date  = mdate();
 744 }
 745
 746 static void ThreadStep(vout_thread_t *vout, mtime_t *duration)
 747 {
 748     *duration = 0;
 749
 750     if (vout->p->step.last <= VLC_TS_INVALID)
 751         vout->p->step.last = vout->p->displayed.timestamp;
 752
 753     mtime_t dummy;
 754     if (ThreadDisplayPicture(vout, true, &dummy))
 755         return;
 756
 757     vout->p->step.timestamp = vout->p->displayed.timestamp;
 758
 759     if (vout->p->step.last > VLC_TS_INVALID &&
 760         vout->p->step.timestamp > vout->p->step.last) {
 761         *duration = vout->p->step.timestamp - vout->p->step.last;
 762         vout->p->step.last = vout->p->step.timestamp;
 763         /* TODO advance subpicture by the duration ... */
 764     }
 765 }
 766
 767 static void ThreadChangeFullscreen(vout_thread_t *vout, bool fullscreen)
 768 {
 769     /* FIXME not sure setting "fullscreen" is good ... */
 770     var_SetBool(vout, "fullscreen", fullscreen);
 771     vout_SetDisplayFullscreen(vout->p->display.vd, fullscreen);
 772 }
 773
 774 static void ThreadChangeOnTop(vout_thread_t *vout, bool is_on_top)
 775 {
 776     vout_SetWindowState(vout->p->display.vd,
 777                         is_on_top ? VOUT_WINDOW_STATE_ABOVE :
 778                                     VOUT_WINDOW_STATE_NORMAL);
 779 }
 780
 781 static void ThreadChangeDisplayFilled(vout_thread_t *vout, bool is_filled)
 782 {
 783     vout_SetDisplayFilled(vout->p->display.vd, is_filled);
 784 }
 785
 786 static void ThreadChangeZoom(vout_thread_t *vout, int num, int den)
 787 {
 788     if (num * 10 < den) {
 789         num = den;
 790         den *= 10;
 791     } else if (num > den * 10) {
 792         num = den * 10;
 793     }
 794
 795     vout_SetDisplayZoom(vout->p->display.vd, num, den);
 796 }
 797
 798 static void ThreadChangeAspectRatio(vout_thread_t *vout,
 799                                     unsigned num, unsigned den)
 800 {
 801     const video_format_t *source = &vout->p->original;
 802
 803     if (num > 0 && den > 0) {
 804         num *= source->i_visible_height;
 805         den *= source->i_visible_width;
 806         vlc_ureduce(&num, &den, num, den, 0);
 807     }
 808     vout_SetDisplayAspect(vout->p->display.vd, num, den);
 809 }
 810
 811
 812 static void ThreadExecuteCropWindow(vout_thread_t *vout,
 813                                     unsigned crop_num, unsigned crop_den,
 814                                     unsigned x, unsigned y,
 815                                     unsigned width, unsigned height)
 816 {
 817     const video_format_t *source = &vout->p->original;
 818
 819     vout_SetDisplayCrop(vout->p->display.vd,
 820                         crop_num, crop_den,
 821                         source->i_x_offset + x,
 822                         source->i_y_offset + y,
 823                         width, height);
 824 }
 825 static void ThreadExecuteCropBorder(vout_thread_t *vout,
 826                                     unsigned left, unsigned top,
 827                                     unsigned right, unsigned bottom)
 828 {
 829     const video_format_t *source = &vout->p->original;
 830     ThreadExecuteCropWindow(vout, 0, 0,
 831                             left,
 832                             top,
 833                             /* At worst, it becomes < 0 (but unsigned) and will be rejected */
 834                             source->i_visible_width  - (left + right),
 835                             source->i_visible_height - (top  + bottom));
 836 }
 837
 838 static void ThreadExecuteCropRatio(vout_thread_t *vout,
 839                                    unsigned num, unsigned den)
 840 {
 841     const video_format_t *source = &vout->p->original;
 842     ThreadExecuteCropWindow(vout, num, den,
 843                             0, 0,
 844                             source->i_visible_width,
 845                             source->i_visible_height);
 846 }
 847
 848 static int ThreadStart(vout_thread_t *vout)
 849 {
 850     vlc_mouse_Init(&vout->p->mouse);
 851     vout->p->decoder_fifo = picture_fifo_New();
 852     vout->p->decoder_pool = NULL;
 853     vout->p->display_pool = NULL;
 854     vout->p->private_pool = NULL;
 855
 856     vout->p->vfilter_chain =
 857         filter_chain_New( vout, "video filter2", false,
 858                           VoutVideoFilterAllocationSetup, NULL, vout);
 859
 860     if (vout_OpenWrapper(vout, vout->p->splitter_name))
 861         return VLC_EGENERIC;
 862     if (vout_InitWrapper(vout))
 863         return VLC_EGENERIC;
 864     assert(vout->p->decoder_pool);
 865
 866     vout->p->displayed.decoded       = NULL;
 867     vout->p->displayed.date          = VLC_TS_INVALID;
 868     vout->p->displayed.decoded       = NULL;
 869     vout->p->displayed.timestamp     = VLC_TS_INVALID;
 870     vout->p->displayed.qtype         = QTYPE_NONE;
 871     vout->p->displayed.is_interlaced = false;
 872
 873     vout->p->step.last               = VLC_TS_INVALID;
 874     vout->p->step.timestamp          = VLC_TS_INVALID;
 875
 876     video_format_Print(VLC_OBJECT(vout), "original format", &vout->p->original);
 877     return VLC_SUCCESS;
 878 }
 879
 880 static void ThreadStop(vout_thread_t *vout)
 881 {
 882     /* Destroy the video filters2 */
 883     filter_chain_Delete(vout->p->vfilter_chain);
 884
 885     /* Destroy translation tables */
 886     if (vout->p->display.vd) {
 887         if (vout->p->decoder_pool) {
 888             ThreadFlush(vout, true, INT64_MAX);
 889             vout_EndWrapper(vout);
 890         }
 891         vout_CloseWrapper(vout);
 892     }
 893
 894     if (vout->p->decoder_fifo)
 895         picture_fifo_Delete(vout->p->decoder_fifo);
 896     assert(!vout->p->decoder_pool);
 897 }
 898
 899 static void ThreadInit(vout_thread_t *vout)
 900 {
 901     vout->p->dead            = false;
 902     vout->p->is_late_dropped = var_InheritBool(vout, "drop-late-frames");
 903     vout->p->pause.is_on     = false;
 904     vout->p->pause.date      = VLC_TS_INVALID;
 905
 906     vout_chrono_Init(&vout->p->render, 5, 10000); /* Arbitrary initial time */
 907 }
 908
 909 static void ThreadClean(vout_thread_t *vout)
 910 {
 911     vout_chrono_Clean(&vout->p->render);
 912     vout->p->dead = true;
 913     vout_control_Dead(&vout->p->control);
 914 }
 915
 916 static int ThreadReinit(vout_thread_t *vout,
 917                         const video_format_t *fmt)
 918 {
 919     video_format_t original;
 920     if (VoutValidateFormat(&original, fmt)) {
 921         ThreadStop(vout);
 922         ThreadClean(vout);
 923         return VLC_EGENERIC;
 924     }
 925     if (video_format_IsSimilar(&original, &vout->p->original))
 926         return VLC_SUCCESS;
 927
 928     ThreadStop(vout);
 929
 930     vout->p->original = original;
 931     if (ThreadStart(vout)) {
 932         ThreadClean(vout);
 933         return VLC_EGENERIC;
 934     }
 935     return VLC_SUCCESS;
 936 }
 937
 938 /*****************************************************************************
 939  * Thread: video output thread
 940  *****************************************************************************
 941  * Video output thread. This function does only returns when the thread is
 942  * terminated. It handles the pictures arriving in the video heap and the
 943  * display device events.
 944  *****************************************************************************/
 945 static void *Thread(void *object)
 946 {
 947     vout_thread_t *vout = object;
 948
 949     vout_interlacing_support_t interlacing = {
 950         .is_interlaced = false,
 951         .date = mdate(),
 952     };
 953     vout_postprocessing_support_t postprocessing = {
 954         .qtype = QTYPE_NONE,
 955     };
 956
 957     mtime_t deadline = VLC_TS_INVALID;
 958     for (;;) {
 959         vout_control_cmd_t cmd;
 960
 961         /* FIXME remove thoses ugly timeouts
 962          */
 963         while (!vout_control_Pop(&vout->p->control, &cmd, deadline, 100000)) {
 964             switch(cmd.type) {
 965             case VOUT_CONTROL_INIT:
 966                 ThreadInit(vout);
 967                 if (ThreadStart(vout)) {
 968                     ThreadStop(vout);
 969                     ThreadClean(vout);
 970                     return NULL;
 971                 }
 972                 break;
 973             case VOUT_CONTROL_CLEAN:
 974                 ThreadStop(vout);
 975                 ThreadClean(vout);
 976                 return NULL;
 977             case VOUT_CONTROL_REINIT:
 978                 if (ThreadReinit(vout, cmd.u.reinit.fmt))
 979                     return NULL;
 980                 break;
 981             case VOUT_CONTROL_OSD_TITLE:
 982                 ThreadDisplayOsdTitle(vout, cmd.u.string);
 983                 break;
 984             case VOUT_CONTROL_CHANGE_FILTERS:
 985                 ThreadChangeFilters(vout, cmd.u.string);
 986                 break;
 987             case VOUT_CONTROL_CHANGE_SUB_FILTERS:
 988                 ThreadChangeSubFilters(vout, cmd.u.string);
 989                 break;
 990             case VOUT_CONTROL_PAUSE:
 991                 ThreadChangePause(vout, cmd.u.pause.is_on, cmd.u.pause.date);
 992                 break;
 993             case VOUT_CONTROL_FLUSH:
 994                 ThreadFlush(vout, false, cmd.u.time);
 995                 break;
 996             case VOUT_CONTROL_RESET:
 997                 ThreadReset(vout);
 998                 break;
 999             case VOUT_CONTROL_STEP:
1000                 ThreadStep(vout, cmd.u.time_ptr);
1001                 break;
1002             case VOUT_CONTROL_FULLSCREEN:
1003                 ThreadChangeFullscreen(vout, cmd.u.boolean);
1004                 break;
1005             case VOUT_CONTROL_ON_TOP:
1006                 ThreadChangeOnTop(vout, cmd.u.boolean);
1007                 break;
1008             case VOUT_CONTROL_DISPLAY_FILLED:
1009                 ThreadChangeDisplayFilled(vout, cmd.u.boolean);
1010                 break;
1011             case VOUT_CONTROL_ZOOM:
1012                 ThreadChangeZoom(vout, cmd.u.pair.a, cmd.u.pair.b);
1013                 break;
1014             case VOUT_CONTROL_ASPECT_RATIO:
1015                 ThreadChangeAspectRatio(vout, cmd.u.pair.a, cmd.u.pair.b);
1016                 break;
1017            case VOUT_CONTROL_CROP_RATIO:
1018                 ThreadExecuteCropRatio(vout, cmd.u.pair.a, cmd.u.pair.b);
1019                 break;
1020             case VOUT_CONTROL_CROP_WINDOW:
1021                 ThreadExecuteCropWindow(vout, 0, 0,
1022                                         cmd.u.window.x, cmd.u.window.y,
1023                                         cmd.u.window.width, cmd.u.window.height);
1024                 break;
1025             case VOUT_CONTROL_CROP_BORDER:
1026                 ThreadExecuteCropBorder(vout,
1027                                         cmd.u.border.left,  cmd.u.border.top,
1028                                         cmd.u.border.right, cmd.u.border.bottom);
1029                 break;
1030             default:
1031                 break;
1032             }
1033             vout_control_cmd_Clean(&cmd);
1034         }
1035
1036         ThreadManage(vout, &deadline, &interlacing, &postprocessing);
1037     }
1038 }
1039