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 the VideoLAN team
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>
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.
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.
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 *****************************************************************************/
30 /*****************************************************************************
32 *****************************************************************************/
33 #include <errno.h> /* ENOMEM */
38 #import <QuartzCore/QuartzCore.h>
39 #import <Cocoa/Cocoa.h>
40 #import <OpenGL/OpenGL.h>
42 /* On OS X, use GL_TEXTURE_RECTANGLE_EXT instead of GL_TEXTURE_2D.
43 This allows sizes which are not powers of 2 */
44 #define VLCGL_TARGET GL_TEXTURE_RECTANGLE_EXT
46 /* OS X OpenGL supports YUV. Hehe. */
47 #define VLCGL_FORMAT GL_YCBCR_422_APPLE
48 #define VLCGL_TYPE GL_UNSIGNED_SHORT_8_8_APPLE
51 #define VLCGL_RGB_FORMAT GL_RGBA
52 #define VLCGL_RGB_TYPE GL_UNSIGNED_BYTE
56 #define YCBCR_MESA 0x8757
58 #ifndef UNSIGNED_SHORT_8_8_MESA
59 #define UNSIGNED_SHORT_8_8_MESA 0x85BA
61 #define VLCGL_YUV_FORMAT YCBCR_MESA
62 #define VLCGL_YUV_TYPE UNSIGNED_SHORT_8_8_MESA
65 #ifndef GL_CLAMP_TO_EDGE
66 # define GL_CLAMP_TO_EDGE 0x812F
69 @interface VLCVideoView : NSObject
70 - (void)addVoutLayer:(CALayer *)layer;
73 /*****************************************************************************
75 *****************************************************************************/
76 static int CreateVout ( vlc_object_t * );
77 static void DestroyVout ( vlc_object_t * );
78 static int Init ( vout_thread_t * );
79 static void End ( vout_thread_t * );
80 static int Manage ( vout_thread_t * );
81 static void Render ( vout_thread_t *, picture_t * );
82 static void DisplayVideo ( vout_thread_t *, picture_t * );
83 static int Control ( vout_thread_t *, int, va_list );
85 static int InitTextures ( vout_thread_t * );
88 set_shortname( "OpenGLLayer" );
89 set_category( CAT_VIDEO );
90 set_subcategory( SUBCAT_VIDEO_VOUT );
91 set_description( _("Core Animation OpenGL Layer (Mac OS X)") );
92 set_capability( "video output", 20 );
93 add_shortcut( "opengllayer" );
94 set_callbacks( CreateVout, DestroyVout );
97 @interface VLCVideoLayer : CAOpenGLLayer {
98 vout_thread_t * p_vout;
100 + (id)layerWithVout:(vout_thread_t*)_p_vout;
103 /*****************************************************************************
104 * vout_sys_t: video output method descriptor
105 *****************************************************************************
106 * This structure is part of the video output thread descriptor.
107 * It describes the OpenGL specific properties of the output thread.
108 *****************************************************************************/
111 vout_thread_t * p_vout;
113 uint8_t *pp_buffer[2]; /* one last rendered, one to be rendered */
115 vlc_bool_t b_frame_available;
119 GLuint p_textures[2];
121 NSAutoreleasePool *autorealease_pool;
122 VLCVideoLayer * o_layer;
123 id o_cocoa_container;
126 /*****************************************************************************
127 * CreateVout: This function allocates and initializes the OpenGL vout method.
128 *****************************************************************************/
129 static int CreateVout( vlc_object_t *p_this )
131 vout_thread_t *p_vout = (vout_thread_t *)p_this;
135 /* Allocate structure */
136 p_vout->p_sys = p_sys = calloc( sizeof( vout_sys_t ), 1 );
139 msg_Err( p_vout, "out of memory" );
143 p_sys->i_tex_width = p_vout->fmt_in.i_width;
144 p_sys->i_tex_height = p_vout->fmt_in.i_height;
146 msg_Dbg( p_vout, "Texture size: %dx%d", p_sys->i_tex_width,
147 p_sys->i_tex_height );
150 p_vout->pf_init = Init;
151 p_vout->pf_end = End;
152 p_vout->pf_manage = Manage;
153 p_vout->pf_render = Render;
154 p_vout->pf_display = DisplayVideo;
155 p_vout->pf_control = Control;
160 /*****************************************************************************
161 * Init: initialize the OpenGL video thread output method
162 *****************************************************************************/
163 static int Init( vout_thread_t *p_vout )
165 vout_sys_t *p_sys = p_vout->p_sys;
169 #if ( defined( WORDS_BIGENDIAN ) && VLCGL_FORMAT == GL_YCBCR_422_APPLE ) || (VLCGL_FORMAT == YCBCR_MESA)
170 p_vout->output.i_chroma = VLC_FOURCC('Y','U','Y','2');
172 #elif (VLCGL_FORMAT == GL_YCBCR_422_APPLE)
173 p_vout->output.i_chroma = VLC_FOURCC('U','Y','V','Y');
177 /* Since OpenGL can do rescaling for us, stick to the default
178 * coordinates and aspect. */
179 p_vout->output.i_width = p_vout->render.i_width;
180 p_vout->output.i_height = p_vout->render.i_height;
181 p_vout->output.i_aspect = p_vout->render.i_aspect;
183 /* We do need a drawable to work properly */
184 vlc_value_t value_drawable;
185 var_Create( p_vout, "drawable", VLC_VAR_DOINHERIT );
186 var_Get( p_vout, "drawable", &value_drawable );
188 p_vout->p_sys->o_cocoa_container = (id) value_drawable.i_int;
190 p_vout->fmt_out = p_vout->fmt_in;
191 p_vout->fmt_out.i_chroma = p_vout->output.i_chroma;
193 /* We know the chroma, allocate two buffer which will be used
194 * directly by the decoder */
196 for( i = 0; i < 2; i++ )
198 p_sys->pp_buffer[i] =
199 malloc( p_sys->i_tex_width * p_sys->i_tex_height * i_pixel_pitch );
200 if( !p_sys->pp_buffer[i] )
202 msg_Err( p_vout, "out of memory" );
206 p_sys->b_frame_available = VLC_FALSE;
209 p_vout->p_picture[0].i_planes = 1;
210 p_vout->p_picture[0].p->p_pixels = p_sys->pp_buffer[0];
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;
219 p_vout->p_picture[0].i_status = DESTROYED_PICTURE;
220 p_vout->p_picture[0].i_type = DIRECT_PICTURE;
222 PP_OUTPUTPICTURE[ 0 ] = &p_vout->p_picture[0];
224 I_OUTPUTPICTURES = 1;
225 p_sys->autorealease_pool = [[NSAutoreleasePool alloc] init];
227 [VLCVideoLayer performSelectorOnMainThread:@selector(autoinitInVout:)
228 withObject:[NSValue valueWithPointer:p_vout]
234 /*****************************************************************************
235 * End: terminate GLX video thread output method
236 *****************************************************************************/
237 static void End( vout_thread_t *p_vout )
239 vout_sys_t *p_sys = p_vout->p_sys;
241 p_vout->p_sys->b_frame_available = 0;
243 [CATransaction performSelectorOnMainThread:@selector(begin)
244 withObject:nil waitUntilDone:YES];
246 [p_sys->o_layer performSelectorOnMainThread:@selector(removeFromSuperlayer)
247 withObject:nil waitUntilDone:YES];
248 [CATransaction performSelectorOnMainThread:@selector(commit)
249 withObject:nil waitUntilDone:YES];
251 // Should be done automatically
252 [p_sys->o_layer release];
253 [p_sys->autorealease_pool release];
255 /* Free the texture buffer*/
256 if( p_sys->pp_buffer[0] ) free( p_sys->pp_buffer[0] );
257 if( p_sys->pp_buffer[1] ) free( p_sys->pp_buffer[1] );
260 /*****************************************************************************
261 * Destroy: destroy GLX video thread output method
262 *****************************************************************************
263 * Terminate an output method created by CreateVout
264 *****************************************************************************/
265 static void DestroyVout( vlc_object_t *p_this )
267 vout_thread_t *p_vout = (vout_thread_t *)p_this;
268 vout_sys_t *p_sys = p_vout->p_sys;
272 /*****************************************************************************
273 * Manage: handle Sys events
274 *****************************************************************************
275 * This function should be called regularly by video output thread. It returns
276 * a non null value if an error occurred.
277 *****************************************************************************/
278 static int Manage( vout_thread_t *p_vout )
283 /*****************************************************************************
284 * Render: render previously calculated output
285 *****************************************************************************/
286 static void Render( vout_thread_t *p_vout, picture_t *p_pic )
288 vout_sys_t *p_sys = p_vout->p_sys;
292 @synchronized(p_sys->o_layer)
294 p_new_index = (p_sys->i_index + 1) & 1;
297 /* Give a buffer where the image will be rendered */
298 p_pic->p->p_pixels = p_sys->pp_buffer[p_new_index];
302 /*****************************************************************************
303 * DisplayVideo: displays previously rendered output
304 *****************************************************************************/
305 static void DisplayVideo( vout_thread_t *p_vout, picture_t *p_pic )
307 vout_sys_t *p_sys = p_vout->p_sys;
309 /* The frame is ready, give its number so the o_layer can display it */
310 @synchronized(p_sys->o_layer)
312 p_sys->i_index = (p_sys->i_index + 1) & 1; /* Indicate the layer should use that index */
315 p_sys->b_frame_available = 1;
318 /*****************************************************************************
319 * Control: control facility for the vout
320 *****************************************************************************/
321 static int Control( vout_thread_t *p_vout, int i_query, va_list args )
323 vout_sys_t *p_sys = p_vout->p_sys;
328 return vout_vaControlDefault( p_vout, i_query, args );
331 if( p_sys->p_vout->pf_control )
332 return p_sys->p_vout->pf_control( p_sys->p_vout, i_query, args );
334 return vout_vaControlDefault( p_vout, i_query, args );
338 /*****************************************************************************
340 *****************************************************************************/
341 static int InitTextures( vout_thread_t *p_vout )
343 vout_sys_t *p_sys = p_vout->p_sys;
346 glDeleteTextures( 2, p_sys->p_textures );
347 glGenTextures( 2, p_sys->p_textures );
349 for( i_index = 0; i_index < 2; i_index++ )
351 glBindTexture( VLCGL_TARGET, p_sys->p_textures[i_index] );
353 /* Set the texture parameters */
354 glTexParameterf( VLCGL_TARGET, GL_TEXTURE_PRIORITY, 1.0 );
356 glTexParameteri( VLCGL_TARGET, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE );
357 glTexParameteri( VLCGL_TARGET, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE );
359 glTexParameteri( VLCGL_TARGET, GL_TEXTURE_MAG_FILTER, GL_LINEAR );
360 glTexParameteri( VLCGL_TARGET, GL_TEXTURE_MIN_FILTER, GL_LINEAR );
362 glTexEnvf( GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE );
364 #ifdef __DISABLED_FOR_NOW__
365 /* Tell the driver not to make a copy of the texture but to use
367 glEnable( GL_UNPACK_CLIENT_STORAGE_APPLE );
368 glPixelStorei( GL_UNPACK_CLIENT_STORAGE_APPLE, GL_TRUE );
371 /* Use AGP texturing */
372 glTexParameteri( VLCGL_TARGET, GL_TEXTURE_STORAGE_HINT_APPLE,
373 GL_STORAGE_SHARED_APPLE );
374 /* Call glTexImage2D only once, and use glTexSubImage2D later */
375 glTexImage2D( VLCGL_TARGET, 0, 3, p_sys->i_tex_width,
376 p_sys->i_tex_height, 0, VLCGL_FORMAT, VLCGL_TYPE,
377 p_sys->pp_buffer[i_index] );
383 /*****************************************************************************
384 * @implementation VLCVideoLayer
386 @implementation VLCVideoLayer
388 /*****************************************************************************
389 * autoinitInVout: Called from the video thread to create a layer.
390 * The created layer is stored in the p_vout. We do that way because, cocoa
391 * doesn't support layer creation on non-main thread.
392 *****************************************************************************/
393 + (void)autoinitInVout:(NSValue*)arg
395 vout_thread_t * p_vout = [arg pointerValue];
396 p_vout->p_sys->o_layer = [[VLCVideoLayer layerWithVout: p_vout] retain];
397 [p_vout->p_sys->o_cocoa_container addVoutLayer:p_vout->p_sys->o_layer];
400 - (void)setVout:(vout_thread_t*)_p_vout
405 + (id)layerWithVout:(vout_thread_t*)_p_vout
407 VLCVideoLayer* me = [super layer];
410 me.asynchronous = YES;
411 [me setVout: _p_vout];
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 );
419 - (BOOL)canDrawInCGLContext:(CGLContextObj)glContext pixelFormat:(CGLPixelFormatObj)pixelFormat forLayerTime:(CFTimeInterval)timeInterval displayTime:(const CVTimeStamp *)timeStamp
421 /* Only draw the frame when if have a frame that was previously rendered */
422 return p_vout->p_sys->b_frame_available;
425 - (void)drawInCGLContext:(CGLContextObj)glContext pixelFormat:(CGLPixelFormatObj)pixelFormat forLayerTime:(CFTimeInterval)timeInterval displayTime:(const CVTimeStamp *)timeStamp
428 CGLLockContext( glContext );
429 CGLSetCurrentContext( glContext );
431 float f_width, f_height, f_x, f_y;
433 f_x = (float)p_vout->fmt_out.i_x_offset;
434 f_y = (float)p_vout->fmt_out.i_y_offset;
435 f_width = (float)p_vout->fmt_out.i_x_offset +
436 (float)p_vout->fmt_out.i_visible_width;
437 f_height = (float)p_vout->fmt_out.i_y_offset +
438 (float)p_vout->fmt_out.i_visible_height;
442 glBindTexture( VLCGL_TARGET, p_vout->p_sys->p_textures[p_vout->p_sys->i_index] );
444 glTexSubImage2D( VLCGL_TARGET, 0, 0, 0,
445 p_vout->fmt_out.i_width,
446 p_vout->fmt_out.i_height,
447 VLCGL_FORMAT, VLCGL_TYPE, p_vout->p_sys->pp_buffer[p_vout->p_sys->i_index] );
451 glClear( GL_COLOR_BUFFER_BIT );
453 glEnable( VLCGL_TARGET );
454 glBegin( GL_POLYGON );
455 glTexCoord2f( f_x, f_y ); glVertex2f( -1.0, 1.0 );
456 glTexCoord2f( f_width, f_y ); glVertex2f( 1.0, 1.0 );
457 glTexCoord2f( f_width, f_height ); glVertex2f( 1.0, -1.0 );
458 glTexCoord2f( f_x, f_height ); glVertex2f( -1.0, -1.0 );
461 glDisable( VLCGL_TARGET );
464 CGLUnlockContext( glContext );
467 - (CGLPixelFormatObj)copyCGLPixelFormatForDisplayMask:(uint32_t)mask
471 NSOpenGLPFANoRecovery,
473 NSOpenGLPFAAccelerated,
474 NSOpenGLPFADoubleBuffer,
475 NSOpenGLPFAColorSize, 24,
476 NSOpenGLPFAAlphaSize, 8,
477 NSOpenGLPFADepthSize, 24,
478 NSOpenGLPFAStencilSize, 8,
479 NSOpenGLPFAAccumSize, 0,
483 NSOpenGLPixelFormat* fmt = [[NSOpenGLPixelFormat alloc] initWithAttributes: (NSOpenGLPixelFormatAttribute*) attribs];
486 return [fmt CGLPixelFormatObj];
489 - (CGLContextObj)copyCGLContextForPixelFormat:(CGLPixelFormatObj)pixelFormat
491 CGLContextObj context = [super copyCGLContextForPixelFormat:pixelFormat];
493 CGLLockContext( context );
494 CGLSetCurrentContext( context );
495 InitTextures( p_vout );
498 glDisable(GL_DEPTH_TEST);
499 glDepthMask(GL_FALSE);
500 glDisable(GL_CULL_FACE);
501 glClearColor( 0.0f, 0.0f, 0.0f, 1.0f );
502 glClear( GL_COLOR_BUFFER_BIT );
505 /* Swap buffers only during the vertical retrace of the monitor.
506 http://developer.apple.com/documentation/GraphicsImaging/
507 Conceptual/OpenGL/chap5/chapter_5_section_44.html */
510 CGLSetParameter( CGLGetCurrentContext(), kCGLCPSwapInterval,
513 CGLUnlockContext( context );
517 - (void)releaseCGLContext:(CGLContextObj)glContext
519 CGLLockContext( glContext );
520 CGLSetCurrentContext( glContext );
522 glDeleteTextures( 2, p_vout->p_sys->p_textures );
524 CGLUnlockContext( glContext );