git.sesse.net Git - vlc/blob - modules/video_output/ios2.m

   1 /*****************************************************************************
   2  * ios2.m: iOS OpenGL ES 2 provider
   3  *****************************************************************************
   4  * Copyright (C) 2001-2013 VLC authors and VideoLAN
   5  * $Id$
   6  *
   7  * Authors: Pierre d'Herbemont <pdherbemont at videolan dot org>
   8  *          Felix Paul Kühne <fkuehne at videolan dot org>
   9  *          David Fuhrmann <david dot fuhrmann at googlemail dot com>
  10  *          Rémi Denis-Courmont
  11  *          Laurent Aimar <fenrir _AT_ videolan _DOT_ org>
  12  *          Eric Petit <titer@m0k.org>
  13  *
  14  *
  15  * This program is free software; you can redistribute it and/or modify it
  16  * under the terms of the GNU Lesser General Public License as published by
  17  * the Free Software Foundation; either version 2.1 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 Lesser General Public License for more details.
  24  *
  25  * You should have received a copy of the GNU Lesser General Public License
  26  * along with this program; if not, write to the Free Software Foundation,
  27  * Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
  28  *****************************************************************************/
  29
  30 /*****************************************************************************
  31  * Preamble
  32  *****************************************************************************/
  33
  34 #import <UIKit/UIKit.h>
  35 #import <OpenGLES/EAGL.h>
  36 #import <OpenGLES/ES2/gl.h>
  37 #import <QuartzCore/QuartzCore.h>
  38 #import <dlfcn.h>
  39
  40 #ifdef HAVE_CONFIG_H
  41 # include "config.h"
  42 #endif
  43
  44 #include <vlc_common.h>
  45 #include <vlc_plugin.h>
  46 #include <vlc_vout_display.h>
  47 #include <vlc_opengl.h>
  48 #include <vlc_dialog.h>
  49 #include "opengl.h"
  50
  51 /**
  52  * Forward declarations
  53  */
  54 static int Open(vlc_object_t *);
  55 static void Close(vlc_object_t *);
  56
  57 static picture_pool_t* PicturePool(vout_display_t *vd, unsigned requested_count);
  58 static void PictureRender(vout_display_t* vd, picture_t *pic, subpicture_t *subpicture);
  59 static void PictureDisplay(vout_display_t* vd, picture_t *pic, subpicture_t *subpicture);
  60 static int Control(vout_display_t* vd, int query, va_list ap);
  61
  62 static void *OurGetProcAddress(vlc_gl_t *, const char *);
  63
  64 static int OpenglESClean(vlc_gl_t* gl);
  65 static void OpenglESSwap(vlc_gl_t* gl);
  66
  67 /**
  68  * Module declaration
  69  */
  70 vlc_module_begin ()
  71     set_shortname("iOS vout")
  72     set_description(N_("iOS OpenGL video output"))
  73     set_category(CAT_VIDEO)
  74     set_subcategory(SUBCAT_VIDEO_VOUT)
  75     set_capability("vout display", 300)
  76     set_callbacks(Open, Close)
  77
  78     add_shortcut("vout_ios2")
  79 vlc_module_end ()
  80
  81 @interface VLCOpenGLES2VideoView : UIView {
  82     vout_display_t *_voutDisplay;
  83     EAGLContext *_eaglContext;
  84     GLuint _renderBuffer;
  85     GLuint _frameBuffer;
  86
  87     BOOL _bufferNeedReset;
  88     BOOL _appActive;
  89 }
  90 @property (readwrite) vout_display_t* voutDisplay;
  91 @property (readonly) EAGLContext* eaglContext;
  92 @property (readonly) BOOL isAppActive;
  93
  94 - (void)createBuffers;
  95 - (void)destroyBuffers;
  96 - (void)resetBuffers;
  97 @end
  98
  99 struct vout_display_sys_t
 100 {
 101     VLCOpenGLES2VideoView *glESView;
 102     UIView* viewContainer;
 103
 104     vlc_gl_t gl;
 105     vout_display_opengl_t *vgl;
 106
 107     picture_pool_t *picturePool;
 108     bool has_first_frame;
 109
 110     vout_display_place_t place;
 111 };
 112
 113 static void *OurGetProcAddress(vlc_gl_t *gl, const char *name)
 114 {
 115     VLC_UNUSED(gl);
 116
 117     return dlsym(RTLD_DEFAULT, name);
 118 }
 119
 120 static int Open(vlc_object_t *this)
 121 {
 122     vout_display_t *vd = (vout_display_t *)this;
 123     vout_display_sys_t *sys = calloc (1, sizeof(*sys));
 124     NSAutoreleasePool *autoreleasePool = nil;
 125
 126     if (!sys)
 127         return VLC_ENOMEM;
 128
 129     vd->sys = sys;
 130     sys->picturePool = NULL;
 131     sys->gl.sys = NULL;
 132
 133     autoreleasePool = [[NSAutoreleasePool alloc] init];
 134
 135     /* get the object we will draw into */
 136     UIView* viewContainer = var_CreateGetAddress (vd, "drawable-nsobject");
 137     if (!viewContainer || ![viewContainer isKindOfClass:[UIView class]])
 138         goto bailout;
 139
 140     vout_display_DeleteWindow (vd, NULL);
 141
 142     /* This will be released in Close(), on
 143      * main thread, after we are done using it. */
 144     sys->viewContainer = [viewContainer retain];
 145
 146     /* setup the actual OpenGL ES view */
 147     sys->glESView = [[VLCOpenGLES2VideoView alloc] initWithFrame:[viewContainer bounds]];
 148
 149     if (!sys->glESView)
 150         goto bailout;
 151
 152     [sys->glESView setVoutDisplay:vd];
 153
 154     [sys->viewContainer performSelectorOnMainThread:@selector(addSubview:) withObject:sys->glESView waitUntilDone:YES];
 155
 156     /* Initialize common OpenGL video display */
 157     sys->gl.lock = OpenglESClean;
 158     sys->gl.unlock = nil;
 159     sys->gl.swap = OpenglESSwap;
 160     sys->gl.getProcAddress = OurGetProcAddress;
 161     sys->gl.sys = sys;
 162     const vlc_fourcc_t *subpicture_chromas;
 163     video_format_t fmt = vd->fmt;
 164
 165     sys->vgl = vout_display_opengl_New (&vd->fmt, &subpicture_chromas, &sys->gl);
 166     if (!sys->vgl) {
 167         sys->gl.sys = NULL;
 168         goto bailout;
 169     }
 170
 171     /* */
 172     vout_display_info_t info = vd->info;
 173     info.has_pictures_invalid = false;
 174     info.has_event_thread = true;
 175     info.subpicture_chromas = subpicture_chromas;
 176
 177     /* Setup vout_display_t once everything is fine */
 178     vd->info = info;
 179
 180     vd->pool = PicturePool;
 181     vd->prepare = PictureRender;
 182     vd->display = PictureDisplay;
 183     vd->control = Control;
 184
 185     /* */
 186     [[NSNotificationCenter defaultCenter] addObserver:sys->glESView selector:@selector(applicationStateChanged:) name:UIApplicationWillResignActiveNotification object:nil];
 187     [[NSNotificationCenter defaultCenter] addObserver:sys->glESView selector:@selector(applicationStateChanged:) name:UIApplicationDidBecomeActiveNotification object:nil];
 188     [sys->glESView performSelectorOnMainThread:@selector(reshape) withObject:nil waitUntilDone:YES];
 189
 190     [autoreleasePool release];
 191     return VLC_SUCCESS;
 192
 193 bailout:
 194     [autoreleasePool release];
 195     Close(this);
 196     return VLC_EGENERIC;
 197 }
 198
 199 void Close (vlc_object_t *this)
 200 {
 201     vout_display_t *vd = (vout_display_t *)this;
 202     vout_display_sys_t *sys = vd->sys;
 203
 204     [sys->glESView setVoutDisplay:nil];
 205
 206     var_Destroy (vd, "drawable-nsobject");
 207     [sys->viewContainer performSelectorOnMainThread:@selector(release) withObject:nil waitUntilDone:NO];
 208     [sys->glESView performSelectorOnMainThread:@selector(removeFromSuperview) withObject:nil waitUntilDone:NO];
 209
 210     if (sys->gl.sys != NULL) {
 211         msg_Dbg(this, "deleting display");
 212         vout_display_opengl_Delete(sys->vgl);
 213     }
 214
 215     [sys->glESView release];
 216
 217     free(sys);
 218 }
 219
 220 /*****************************************************************************
 221  * vout display callbacks
 222  *****************************************************************************/
 223
 224 static int Control(vout_display_t *vd, int query, va_list ap)
 225 {
 226     vout_display_sys_t *sys = vd->sys;
 227
 228     switch (query) {
 229         case VOUT_DISPLAY_CHANGE_FULLSCREEN:
 230         case VOUT_DISPLAY_CHANGE_WINDOW_STATE:
 231         case VOUT_DISPLAY_HIDE_MOUSE:
 232             return VLC_SUCCESS;
 233         case VOUT_DISPLAY_CHANGE_DISPLAY_FILLED:
 234         case VOUT_DISPLAY_CHANGE_ZOOM:
 235         case VOUT_DISPLAY_CHANGE_SOURCE_ASPECT:
 236         case VOUT_DISPLAY_CHANGE_SOURCE_CROP:
 237         case VOUT_DISPLAY_CHANGE_DISPLAY_SIZE:
 238         {
 239             if (!vd->sys)
 240                 return VLC_EGENERIC;
 241
 242             NSAutoreleasePool * autoreleasePool = [[NSAutoreleasePool alloc] init];
 243
 244             const vout_display_cfg_t *cfg;
 245             const video_format_t *source;
 246             bool is_forced = false;
 247
 248             if (query == VOUT_DISPLAY_CHANGE_SOURCE_ASPECT || query == VOUT_DISPLAY_CHANGE_SOURCE_CROP) {
 249                 source = (const video_format_t *)va_arg(ap, const video_format_t *);
 250                 cfg = vd->cfg;
 251             } else {
 252                 source = &vd->source;
 253                 cfg = (const vout_display_cfg_t*)va_arg(ap, const vout_display_cfg_t *);
 254                 if (query == VOUT_DISPLAY_CHANGE_DISPLAY_SIZE)
 255                     is_forced = (bool)va_arg(ap, int);
 256             }
 257
 258             if (query == VOUT_DISPLAY_CHANGE_DISPLAY_SIZE && is_forced
 259                 && (cfg->display.width != vd->cfg->display.width
 260                     || cfg->display.height != vd->cfg->display.height))
 261                 return VLC_EGENERIC;
 262
 263             /* we always use our current frame here, because we have some size constraints
 264              in the ui vout provider */
 265             vout_display_cfg_t cfg_tmp = *cfg;
 266             CGRect bounds;
 267             bounds = [sys->glESView bounds];
 268
 269             /* on HiDPI displays, the point bounds don't equal the actual pixel based bounds */
 270             CGFloat scaleFactor = sys->glESView.contentScaleFactor;
 271             cfg_tmp.display.width = bounds.size.width * scaleFactor;
 272             cfg_tmp.display.height = bounds.size.height * scaleFactor;
 273
 274             vout_display_place_t place;
 275             vout_display_PlacePicture(&place, source, &cfg_tmp, false);
 276             @synchronized (sys->glESView) {
 277                 sys->place = place;
 278             }
 279
 280             /* For resize, we call glViewport in reshape and not here.
 281              This has the positive side effect that we avoid erratic sizing as we animate every resize. */
 282             if (query != VOUT_DISPLAY_CHANGE_DISPLAY_SIZE)
 283                 // x / y are top left corner, but we need the lower left one
 284                 glViewport(place.x, cfg_tmp.display.height - (place.y + place.height), place.width, place.height);
 285
 286             [autoreleasePool release];
 287             return VLC_SUCCESS;
 288         }
 289
 290         case VOUT_DISPLAY_GET_OPENGL:
 291         {
 292             vlc_gl_t **gl = va_arg(ap, vlc_gl_t **);
 293             *gl = &sys->gl;
 294             return VLC_SUCCESS;
 295         }
 296
 297         case VOUT_DISPLAY_RESET_PICTURES:
 298             assert (0);
 299         default:
 300             msg_Err(vd, "Unknown request %i in iOS ES 2 vout display", query);
 301             return VLC_EGENERIC;
 302     }
 303 }
 304
 305 static void PictureDisplay(vout_display_t *vd, picture_t *pic, subpicture_t *subpicture)
 306 {
 307     vout_display_sys_t *sys = vd->sys;
 308     sys->has_first_frame = true;
 309     if (likely([sys->glESView isAppActive]))
 310         vout_display_opengl_Display(sys->vgl, &vd->source);
 311
 312     picture_Release(pic);
 313
 314     if (subpicture)
 315         subpicture_Delete(subpicture);
 316 }
 317
 318 static void PictureRender(vout_display_t *vd, picture_t *pic, subpicture_t *subpicture)
 319 {
 320     vout_display_sys_t *sys = vd->sys;
 321
 322     if (likely([sys->glESView isAppActive]))
 323         vout_display_opengl_Prepare(sys->vgl, pic, subpicture);
 324 }
 325
 326 static picture_pool_t *PicturePool(vout_display_t *vd, unsigned requested_count)
 327 {
 328     vout_display_sys_t *sys = vd->sys;
 329
 330     if (!sys->picturePool)
 331         sys->picturePool = vout_display_opengl_GetPool(sys->vgl, requested_count);
 332     assert(sys->picturePool);
 333     return sys->picturePool;
 334 }
 335
 336 /*****************************************************************************
 337  * vout opengl callbacks
 338  *****************************************************************************/
 339 static int OpenglESClean(vlc_gl_t *gl)
 340 {
 341     vout_display_sys_t *sys = (vout_display_sys_t *)gl->sys;
 342     [sys->glESView resetBuffers];
 343     return 0;
 344 }
 345
 346 static void OpenglESSwap(vlc_gl_t *gl)
 347 {
 348     vout_display_sys_t *sys = (vout_display_sys_t *)gl->sys;
 349     if (likely([sys->glESView isAppActive]))
 350         [[sys->glESView eaglContext] presentRenderbuffer:GL_RENDERBUFFER];
 351 }
 352
 353 /*****************************************************************************
 354  * Our UIView object
 355  *****************************************************************************/
 356 @implementation VLCOpenGLES2VideoView
 357 @synthesize voutDisplay = _voutDisplay, eaglContext = _eaglContext, isAppActive = _appActive;
 358
 359 + (Class)layerClass
 360 {
 361     return [CAEAGLLayer class];
 362 }
 363
 364 - (id)initWithFrame:(CGRect)frame
 365 {
 366     self = [super initWithFrame:frame]; // perform selector on main thread?
 367
 368     if (!self)
 369         return nil;
 370
 371     CAEAGLLayer * layer = (CAEAGLLayer *)self.layer;
 372     layer.drawableProperties = [NSDictionary dictionaryWithObject:kEAGLColorFormatRGBA8 forKey: kEAGLDrawablePropertyColorFormat];
 373     layer.opaque = YES;
 374
 375     _eaglContext = [[EAGLContext alloc] initWithAPI:kEAGLRenderingAPIOpenGLES2];
 376     if (!_eaglContext)
 377         return nil;
 378     [EAGLContext setCurrentContext:_eaglContext];
 379
 380     [self performSelectorOnMainThread:@selector(createBuffers) withObject:nil waitUntilDone:YES];
 381     [self performSelectorOnMainThread:@selector(reshape) withObject:nil waitUntilDone:NO];
 382     [self setAutoresizingMask: UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight];
 383
 384     _appActive = ([UIApplication sharedApplication].applicationState == UIApplicationStateActive);
 385
 386     return self;
 387 }
 388
 389 - (void)dealloc
 390 {
 391     [[NSNotificationCenter defaultCenter] removeObserver:self];
 392     [_eaglContext release];
 393     [super dealloc];
 394 }
 395
 396 /* we don't get the correct scale factor if we don't overwrite this method */
 397 - (void)drawRect:(CGRect) rect
 398 {
 399     [super drawRect:rect];
 400 }
 401
 402 - (void)createBuffers
 403 {
 404     /* make sure the current context is us */
 405     [EAGLContext setCurrentContext:_eaglContext];
 406
 407     /* create render buffer */
 408     glGenRenderbuffers(1, &_renderBuffer);
 409     glBindRenderbuffer(GL_RENDERBUFFER, _renderBuffer);
 410
 411     /* create frame buffer */
 412     glGenFramebuffers(1, &_frameBuffer);
 413     glBindFramebuffer(GL_FRAMEBUFFER, _frameBuffer);
 414
 415     /* allocate storage for the pixels we are going to to draw to */
 416     [_eaglContext renderbufferStorage:GL_RENDERBUFFER fromDrawable:(id<EAGLDrawable>)self.layer];
 417
 418     /* bind render buffer to frame buffer */
 419     glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_RENDERBUFFER, _renderBuffer);
 420
 421     /* make sure that our shape is ok */
 422     [self performSelectorOnMainThread:@selector(reshape) withObject:nil waitUntilDone:NO];
 423 }
 424
 425 - (void)destroyBuffers
 426 {
 427     /* re-set current context */
 428     [EAGLContext setCurrentContext:_eaglContext];
 429
 430     /* clear frame buffer */
 431     glDeleteFramebuffers(1, &_frameBuffer);
 432     _frameBuffer = 0;
 433
 434     /* clear render buffer */
 435     glDeleteRenderbuffers(1, &_renderBuffer);
 436     _renderBuffer = 0;
 437 }
 438
 439 - (void)resetBuffers
 440 {
 441     if (_bufferNeedReset) {
 442         [self destroyBuffers];
 443         [self createBuffers];
 444         _bufferNeedReset = NO;
 445     }
 446 }
 447
 448 - (void)layoutSubviews
 449 {
 450     /* this method is called as soon as we are resized.
 451      * so set a variable to re-create our buffers on the next clean event */
 452     _bufferNeedReset = YES;
 453 }
 454
 455 /**
 456  * Method called by Cocoa when the view is resized.
 457  */
 458 - (void)reshape
 459 {
 460     assert([[NSThread currentThread] isMainThread]);
 461
 462     CGRect bounds;
 463     bounds = [self bounds];
 464
 465     vout_display_place_t place;
 466
 467     @synchronized(self) {
 468         if (_voutDisplay) {
 469             vout_display_cfg_t cfg_tmp = *(_voutDisplay->cfg);
 470             CGFloat scaleFactor = self.contentScaleFactor;
 471
 472             cfg_tmp.display.width  = bounds.size.width * scaleFactor;
 473             cfg_tmp.display.height = bounds.size.height * scaleFactor;
 474
 475             vout_display_PlacePicture(&place, &_voutDisplay->source, &cfg_tmp, false);
 476             _voutDisplay->sys->place = place;
 477             vout_display_SendEventDisplaySize(_voutDisplay, bounds.size.width * scaleFactor, bounds.size.height * scaleFactor, _voutDisplay->cfg->is_fullscreen);
 478         }
 479     }
 480
 481     // x / y are top left corner, but we need the lower left one
 482     glViewport(place.x, place.y, place.width, place.height);
 483 }
 484
 485 - (void)applicationStateChanged:(NSNotification *)notification
 486 {
 487     if ([[notification name] isEqualToString: UIApplicationWillResignActiveNotification])
 488         _appActive = NO;
 489     else
 490         _appActive = YES;
 491 }
 492
 493 - (void)updateConstraints
 494 {
 495     [self reshape];
 496     [super updateConstraints];
 497 }
 498
 499 - (BOOL)isOpaque
 500 {
 501     return YES;
 502 }
 503
 504 - (BOOL)acceptsFirstResponder
 505 {
 506     return YES;
 507 }
 508
 509 @end