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

   1 /*****************************************************************************
   2  * opengl.c: CAOpenGLLayer (Mac OS X) video output. Display a video output in
   3  * a layer. The layer will register itself to the drawable object stored in
   4  * the "drawable" variable.
   5  *****************************************************************************
   6  * Copyright (C) 2004-2009 the VideoLAN team
   7  * $Id$
   8  *
   9  * Authors: Cyril Deguet <asmax@videolan.org>
  10  *          Gildas Bazin <gbazin@videolan.org>
  11  *          Eric Petit <titer@m0k.org>
  12  *          Cedric Cocquebert <cedric.cocquebert@supelec.fr>
  13  *          Pierre d'Herbemont <pdherbemont # videolan.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 #include <errno.h>                                                 /* ENOMEM */
  34
  35 #ifdef HAVE_CONFIG_H
  36 # include "config.h"
  37 #endif
  38
  39 #include <vlc_common.h>
  40 #include <vlc_plugin.h>
  41 #include <vlc_vout.h>
  42
  43 #import <QuartzCore/QuartzCore.h>
  44 #import <Cocoa/Cocoa.h>
  45 #import <OpenGL/OpenGL.h>
  46
  47 /* On OS X, use GL_TEXTURE_RECTANGLE_EXT instead of GL_TEXTURE_2D.
  48    This allows sizes which are not powers of 2 */
  49 #define VLCGL_TARGET GL_TEXTURE_RECTANGLE_EXT
  50
  51 /* OS X OpenGL supports YUV. Hehe. */
  52 #define VLCGL_FORMAT GL_YCBCR_422_APPLE
  53 #define VLCGL_TYPE   GL_UNSIGNED_SHORT_8_8_APPLE
  54
  55 /* RV32 */
  56 #define VLCGL_RGB_FORMAT GL_RGBA
  57 #define VLCGL_RGB_TYPE GL_UNSIGNED_BYTE
  58
  59 /* YUY2 */
  60 #ifndef YCBCR_MESA
  61 #define YCBCR_MESA 0x8757
  62 #endif
  63 #ifndef UNSIGNED_SHORT_8_8_MESA
  64 #define UNSIGNED_SHORT_8_8_MESA 0x85BA
  65 #endif
  66 #define VLCGL_YUV_FORMAT YCBCR_MESA
  67 #define VLCGL_YUV_TYPE UNSIGNED_SHORT_8_8_MESA
  68
  69
  70 #ifndef GL_CLAMP_TO_EDGE
  71 #   define GL_CLAMP_TO_EDGE 0x812F
  72 #endif
  73
  74 @interface VLCVideoView : NSObject
  75 - (void)addVoutLayer:(CALayer *)layer;
  76 @end
  77
  78 /*****************************************************************************
  79  * Vout interface
  80  *****************************************************************************/
  81 static int  CreateVout   ( vlc_object_t * );
  82 static void DestroyVout  ( vlc_object_t * );
  83 static int  Init         ( vout_thread_t * );
  84 static void End          ( vout_thread_t * );
  85 static int  Manage       ( vout_thread_t * );
  86 static void Render       ( vout_thread_t *, picture_t * );
  87 static void DisplayVideo ( vout_thread_t *, picture_t * );
  88 static int  Control      ( vout_thread_t *, int, va_list );
  89
  90 static int InitTextures  ( vout_thread_t * );
  91
  92 vlc_module_begin ()
  93     set_shortname( "OpenGLLayer" )
  94     set_category( CAT_VIDEO )
  95     set_subcategory( SUBCAT_VIDEO_VOUT )
  96     set_description( N_("Core Animation OpenGL Layer (Mac OS X)") )
  97     set_capability( "video output", 20 )
  98     add_shortcut( "opengllayer" )
  99     set_callbacks( CreateVout, DestroyVout )
 100 vlc_module_end ()
 101
 102 @interface VLCVoutLayer : CAOpenGLLayer {
 103     vout_thread_t * p_vout;
 104 }
 105 + (id)layerWithVout:(vout_thread_t*)_p_vout;
 106 @end
 107
 108 /*****************************************************************************
 109  * vout_sys_t: video output method descriptor
 110  *****************************************************************************
 111  * This structure is part of the video output thread descriptor.
 112  * It describes the OpenGL specific properties of the output thread.
 113  *****************************************************************************/
 114 struct vout_sys_t
 115 {
 116     vout_thread_t * p_vout;
 117
 118     uint8_t    *pp_buffer[2]; /* one last rendered, one to be rendered */
 119     int         i_index;
 120     bool  b_frame_available;
 121
 122     CGLContextObj glContext;
 123
 124     int         i_tex_width;
 125     int         i_tex_height;
 126     GLuint      p_textures[2];
 127
 128     NSAutoreleasePool *autorealease_pool;
 129     VLCVoutLayer * o_layer;
 130     id          o_cocoa_container;
 131 };
 132
 133 /*****************************************************************************
 134  * CreateVout: This function allocates and initializes the OpenGL vout method.
 135  *****************************************************************************/
 136 static int CreateVout( vlc_object_t *p_this )
 137 {
 138     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 139     vout_sys_t *p_sys;
 140     char * psz;
 141
 142     /* Allocate structure */
 143     p_vout->p_sys = p_sys = calloc( 1, sizeof( vout_sys_t ) );
 144     if( p_sys == NULL )
 145         return VLC_EGENERIC;
 146
 147     p_sys->i_tex_width  = p_vout->fmt_in.i_width;
 148     p_sys->i_tex_height = p_vout->fmt_in.i_height;
 149
 150     msg_Dbg( p_vout, "Texture size: %dx%d", p_sys->i_tex_width,
 151              p_sys->i_tex_height );
 152
 153     p_vout->pf_init = Init;
 154     p_vout->pf_end = End;
 155     p_vout->pf_manage = Manage;
 156     p_vout->pf_render = Render;
 157     p_vout->pf_display = DisplayVideo;
 158     p_vout->pf_control = Control;
 159
 160     return VLC_SUCCESS;
 161 }
 162
 163 /*****************************************************************************
 164  * Init: initialize the OpenGL video thread output method
 165  *****************************************************************************/
 166 static int Init( vout_thread_t *p_vout )
 167 {
 168     vout_sys_t *p_sys = p_vout->p_sys;
 169     int i_pixel_pitch;
 170     vlc_value_t val;
 171
 172 #if ( defined( WORDS_BIGENDIAN ) && VLCGL_FORMAT == GL_YCBCR_422_APPLE ) || (VLCGL_FORMAT == YCBCR_MESA)
 173     p_vout->output.i_chroma = VLC_FOURCC('Y','U','Y','2');
 174     i_pixel_pitch = 2;
 175 #elif (VLCGL_FORMAT == GL_YCBCR_422_APPLE)
 176     p_vout->output.i_chroma = VLC_FOURCC('U','Y','V','Y');
 177     i_pixel_pitch = 2;
 178 #endif
 179
 180     /* Since OpenGL can do rescaling for us, stick to the default
 181      * coordinates and aspect. */
 182     p_vout->output.i_width  = p_vout->render.i_width;
 183     p_vout->output.i_height = p_vout->render.i_height;
 184     p_vout->output.i_aspect = p_vout->render.i_aspect;
 185
 186     /* We do need a drawable to work properly */
 187     vlc_value_t value_drawable;
 188     var_Create( p_vout, "drawable-gl", VLC_VAR_DOINHERIT );
 189     var_Get( p_vout, "drawable-gl", &value_drawable );
 190
 191     p_vout->p_sys->o_cocoa_container = (id) value_drawable.i_int;
 192
 193     p_vout->fmt_out = p_vout->fmt_in;
 194     p_vout->fmt_out.i_chroma = p_vout->output.i_chroma;
 195
 196     /* We know the chroma, allocate two buffer which will be used
 197      * directly by the decoder */
 198     int i;
 199     for( i = 0; i < 2; i++ )
 200     {
 201         p_sys->pp_buffer[i] =
 202             malloc( p_sys->i_tex_width * p_sys->i_tex_height * i_pixel_pitch );
 203         if( !p_sys->pp_buffer[i] )
 204             return VLC_EGENERIC;
 205     }
 206     p_sys->b_frame_available = false;
 207     p_sys->i_index = 0;
 208
 209     p_vout->p_picture[0].i_planes = 1;
 210     p_vout->p_picture[0].p->p_pixels = p_sys->pp_buffer[p_sys->i_index];
 211     p_vout->p_picture[0].p->i_lines = p_vout->output.i_height;
 212     p_vout->p_picture[0].p->i_visible_lines = p_vout->output.i_height;
 213     p_vout->p_picture[0].p->i_pixel_pitch = i_pixel_pitch;
 214     p_vout->p_picture[0].p->i_pitch = p_vout->output.i_width *
 215         p_vout->p_picture[0].p->i_pixel_pitch;
 216     p_vout->p_picture[0].p->i_visible_pitch = p_vout->output.i_width *
 217         p_vout->p_picture[0].p->i_pixel_pitch;
 218
 219     p_vout->p_picture[0].i_status = DESTROYED_PICTURE;
 220     p_vout->p_picture[0].i_type   = DIRECT_PICTURE;
 221
 222     PP_OUTPUTPICTURE[ 0 ] = &p_vout->p_picture[0];
 223
 224     I_OUTPUTPICTURES = 1;
 225     p_sys->autorealease_pool = [[NSAutoreleasePool alloc] init];
 226
 227     [VLCVoutLayer performSelectorOnMainThread:@selector(autoinitInVout:)
 228                              withObject:[NSValue valueWithPointer:p_vout]
 229                              waitUntilDone:YES];
 230
 231     return 0;
 232 }
 233
 234 /*****************************************************************************
 235  * End: terminate GLX video thread output method
 236  *****************************************************************************/
 237 static void End( vout_thread_t *p_vout )
 238 {
 239     vout_sys_t *p_sys = p_vout->p_sys;
 240
 241     p_vout->p_sys->b_frame_available = false;
 242
 243     [p_vout->p_sys->o_cocoa_container performSelectorOnMainThread:@selector(removeVoutLayer:) withObject:p_vout->p_sys->o_layer waitUntilDone:YES];
 244
 245     // Should be done automatically
 246     [p_sys->o_layer release];
 247     [p_sys->autorealease_pool release];
 248
 249     /* Free the texture buffer*/
 250     free( p_sys->pp_buffer[0] );
 251     free( p_sys->pp_buffer[1] );
 252 }
 253
 254 /*****************************************************************************
 255  * Destroy: destroy GLX video thread output method
 256  *****************************************************************************
 257  * Terminate an output method created by CreateVout
 258  *****************************************************************************/
 259 static void DestroyVout( vlc_object_t *p_this )
 260 {
 261     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 262     vout_sys_t *p_sys = p_vout->p_sys;
 263     free( p_sys );
 264 }
 265
 266 /*****************************************************************************
 267  * Manage: handle Sys events
 268  *****************************************************************************
 269  * This function should be called regularly by video output thread. It returns
 270  * a non null value if an error occurred.
 271  *****************************************************************************/
 272 static int Manage( vout_thread_t *p_vout )
 273 {
 274     vout_sys_t *p_sys = p_vout->p_sys;
 275
 276     return VLC_SUCCESS;
 277 }
 278
 279 /*****************************************************************************
 280  * Render: render previously calculated output
 281  *****************************************************************************/
 282 static void Render( vout_thread_t *p_vout, picture_t *p_pic )
 283 {
 284     vout_sys_t *p_sys = p_vout->p_sys;
 285
 286     @synchronized( p_sys->o_layer ) /* Make sure the p_sys->glContext isn't edited */
 287     {
 288         if( p_sys->glContext )
 289         {
 290             CGLLockContext(p_sys->glContext);
 291             CGLSetCurrentContext(p_sys->glContext);
 292             int i_new_index;
 293             i_new_index = ( p_sys->i_index + 1 ) & 1;
 294
 295
 296             /* Update the texture */
 297             glBindTexture( VLCGL_TARGET, p_sys->p_textures[i_new_index] );
 298             glTexSubImage2D( VLCGL_TARGET, 0, 0, 0,
 299                          p_vout->fmt_out.i_width,
 300                          p_vout->fmt_out.i_height,
 301                          VLCGL_FORMAT, VLCGL_TYPE, p_sys->pp_buffer[i_new_index] );
 302
 303             /* Bind to the previous texture for drawing */
 304             glBindTexture( VLCGL_TARGET, p_sys->p_textures[p_sys->i_index] );
 305
 306             /* Switch buffers */
 307             p_sys->i_index = i_new_index;
 308             p_pic->p->p_pixels = p_sys->pp_buffer[p_sys->i_index];
 309             CGLUnlockContext(p_sys->glContext);
 310
 311             p_sys->b_frame_available = true;
 312         }
 313     }
 314
 315     /* Give a buffer where the image will be rendered */
 316     p_pic->p->p_pixels = p_sys->pp_buffer[p_sys->i_index];
 317 }
 318
 319 /*****************************************************************************
 320  * DisplayVideo: displays previously rendered output
 321  *****************************************************************************/
 322 static void DisplayVideo( vout_thread_t *p_vout, picture_t *p_pic )
 323 {
 324     vout_sys_t *p_sys = p_vout->p_sys;
 325
 326     [p_sys->o_layer performSelectorOnMainThread:@selector(display)
 327                     withObject:nil waitUntilDone:YES];
 328 }
 329
 330 /*****************************************************************************
 331  * Control: control facility for the vout
 332  *****************************************************************************/
 333 static int Control( vout_thread_t *p_vout, int i_query, va_list args )
 334 {
 335     vout_sys_t *p_sys = p_vout->p_sys;
 336
 337     if( p_sys->p_vout->pf_control )
 338         return p_sys->p_vout->pf_control( p_sys->p_vout, i_query, args );
 339     return VLC_EGENERIC;
 340 }
 341
 342 /*****************************************************************************
 343  * InitTextures
 344  *****************************************************************************/
 345 static int InitTextures( vout_thread_t *p_vout )
 346 {
 347     vout_sys_t *p_sys = p_vout->p_sys;
 348     int i_index;
 349
 350     glDeleteTextures( 2, p_sys->p_textures );
 351     glGenTextures( 2, p_sys->p_textures );
 352
 353     for( i_index = 0; i_index < 2; i_index++ )
 354     {
 355         glBindTexture( VLCGL_TARGET, p_sys->p_textures[i_index] );
 356
 357         /* Set the texture parameters */
 358         glTexParameterf( VLCGL_TARGET, GL_TEXTURE_PRIORITY, 1.0 );
 359
 360         glTexParameteri( VLCGL_TARGET, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE );
 361         glTexParameteri( VLCGL_TARGET, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE );
 362
 363         glTexParameteri( VLCGL_TARGET, GL_TEXTURE_MAG_FILTER, GL_LINEAR );
 364         glTexParameteri( VLCGL_TARGET, GL_TEXTURE_MIN_FILTER, GL_LINEAR );
 365
 366         glTexEnvf( GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE );
 367
 368         /* Note: It seems that we can't bypass those, and even
 369          * disabled they are used. They are the cause of the flickering */
 370
 371         /* Tell the driver not to make a copy of the texture but to use
 372            our buffer */
 373         glEnable( GL_UNPACK_CLIENT_STORAGE_APPLE );
 374         glPixelStorei( GL_UNPACK_CLIENT_STORAGE_APPLE, GL_TRUE );
 375
 376         /* Use AGP texturing */
 377         glTexParameteri( VLCGL_TARGET, GL_TEXTURE_STORAGE_HINT_APPLE, GL_STORAGE_SHARED_APPLE );
 378
 379         /* Call glTexImage2D only once, and use glTexSubImage2D later */
 380         glTexImage2D( VLCGL_TARGET, 0, 4, p_sys->i_tex_width,
 381                       p_sys->i_tex_height, 0, VLCGL_FORMAT, VLCGL_TYPE,
 382                       p_sys->pp_buffer[i_index] );
 383     }
 384
 385     return 0;
 386 }
 387
 388 /*****************************************************************************
 389  * @implementation VLCVoutLayer
 390  */
 391 @implementation VLCVoutLayer
 392
 393 /*****************************************************************************
 394  * autoinitInVout: Called from the video thread to create a layer.
 395  * The created layer is stored in the p_vout. We do that way because, cocoa
 396  * doesn't support layer creation on non-main thread.
 397  *****************************************************************************/
 398 + (void)autoinitInVout:(NSValue*)arg
 399 {
 400     vout_thread_t * p_vout = [arg pointerValue];
 401     p_vout->p_sys->o_layer = [[VLCVoutLayer layerWithVout:p_vout] retain];
 402     [p_vout->p_sys->o_cocoa_container addVoutLayer:p_vout->p_sys->o_layer];
 403 }
 404
 405 + (id)layerWithVout:(vout_thread_t*)_p_vout
 406 {
 407     VLCVoutLayer* me = [[[self alloc] init] autorelease];
 408     if( me )
 409     {
 410         me->p_vout = _p_vout;
 411         me.asynchronous = NO;
 412         me.bounds = CGRectMake( 0.0, 0.0,
 413                                 (float)_p_vout->fmt_in.i_visible_width * _p_vout->fmt_in.i_sar_num,
 414                                 (float)_p_vout->fmt_in.i_visible_height * _p_vout->fmt_in.i_sar_den );
 415     }
 416     return me;
 417 }
 418
 419 - (BOOL)canDrawInCGLContext:(CGLContextObj)glContext pixelFormat:(CGLPixelFormatObj)pixelFormat forLayerTime:(CFTimeInterval)timeInterval displayTime:(const CVTimeStamp *)timeStamp
 420 {
 421     /* Only draw the frame if we have a frame that was previously rendered */
 422         return p_vout->p_sys->b_frame_available; // Flag is cleared by drawInCGLContext:pixelFormat:forLayerTime:displayTime:
 423 }
 424
 425 - (void)drawInCGLContext:(CGLContextObj)glContext pixelFormat:(CGLPixelFormatObj)pixelFormat forLayerTime:(CFTimeInterval)timeInterval displayTime:(const CVTimeStamp *)timeStamp
 426 {
 427     CGLLockContext( glContext );
 428     CGLSetCurrentContext( glContext );
 429
 430     float f_width, f_height, f_x, f_y;
 431
 432     f_x = (float)p_vout->fmt_out.i_x_offset;
 433     f_y = (float)p_vout->fmt_out.i_y_offset;
 434     f_width = (float)p_vout->fmt_out.i_x_offset +
 435               (float)p_vout->fmt_out.i_visible_width;
 436     f_height = (float)p_vout->fmt_out.i_y_offset +
 437                (float)p_vout->fmt_out.i_visible_height;
 438
 439     glClear( GL_COLOR_BUFFER_BIT );
 440
 441     glEnable( VLCGL_TARGET );
 442     glBegin( GL_POLYGON );
 443     glTexCoord2f( f_x, f_y ); glVertex2f( -1.0, 1.0 );
 444     glTexCoord2f( f_width, f_y ); glVertex2f( 1.0, 1.0 );
 445     glTexCoord2f( f_width, f_height ); glVertex2f( 1.0, -1.0 );
 446     glTexCoord2f( f_x, f_height ); glVertex2f( -1.0, -1.0 );
 447     glEnd();
 448
 449     glDisable( VLCGL_TARGET );
 450
 451     glFlush();
 452
 453     CGLUnlockContext( glContext );
 454 }
 455
 456 - (CGLContextObj)copyCGLContextForPixelFormat:(CGLPixelFormatObj)pixelFormat
 457 {
 458     CGLContextObj context = [super copyCGLContextForPixelFormat:pixelFormat];
 459
 460     CGLLockContext( context );
 461
 462     CGLSetCurrentContext( context );
 463
 464     /* Swap buffers only during the vertical retrace of the monitor.
 465     http://developer.apple.com/documentation/GraphicsImaging/
 466     Conceptual/OpenGL/chap5/chapter_5_section_44.html */
 467
 468     GLint params = 1;
 469     CGLSetParameter( CGLGetCurrentContext(), kCGLCPSwapInterval,
 470                      &params );
 471
 472     InitTextures( p_vout );
 473
 474     glDisable( GL_BLEND );
 475     glDisable( GL_DEPTH_TEST );
 476     glDepthMask( GL_FALSE );
 477     glDisable( GL_CULL_FACE) ;
 478     glClearColor( 0.0f, 0.0f, 0.0f, 1.0f );
 479     glClear( GL_COLOR_BUFFER_BIT );
 480
 481     CGLUnlockContext( context );
 482     @synchronized( self )
 483     {
 484         p_vout->p_sys->glContext = context;
 485     }
 486
 487     return context;
 488 }
 489
 490 - (void)releaseCGLContext:(CGLContextObj)glContext
 491 {
 492     @synchronized( self )
 493     {
 494         p_vout->p_sys->glContext = nil;
 495     }
 496
 497     CGLLockContext( glContext );
 498     CGLSetCurrentContext( glContext );
 499
 500     glDeleteTextures( 2, p_vout->p_sys->p_textures );
 501
 502     CGLUnlockContext( glContext );
 503 }
 504 @end