git.sesse.net Git - vlc/blob - modules/video_output/opengl.c

   1 /*****************************************************************************
   2  * opengl.c: OpenGL video output
   3  *****************************************************************************
   4  * Copyright (C) 2004 VideoLAN
   5  * $Id$
   6  *
   7  * Authors: Cyril Deguet <asmax@videolan.org>
   8  *          Gildas Bazin <gbazin@videolan.org>
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License as published by
  12  * the Free Software Foundation; either version 2 of the License, or
  13  * (at your option) any later version.
  14  *
  15  * This program is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18  * GNU General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU General Public License
  21  * along with this program; if not, write to the Free Software
  22  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111, USA.
  23  *****************************************************************************/
  24
  25 /*****************************************************************************
  26  * Preamble
  27  *****************************************************************************/
  28 #include <errno.h>                                                 /* ENOMEM */
  29 #include <stdlib.h>                                      /* malloc(), free() */
  30 #include <string.h>
  31
  32 #include <vlc/vlc.h>
  33 #include <vlc/vout.h>
  34
  35 #include <GL/gl.h>
  36
  37 /* RV16 */
  38 #ifndef GL_UNSIGNED_SHORT_5_6_5
  39 #define GL_UNSIGNED_SHORT_5_6_5 0x8363
  40 #endif
  41 //#define VLCGL_RGB_FORMAT GL_RGB
  42 //#define VLCGL_RGB_TYPE GL_UNSIGNED_SHORT_5_6_5
  43
  44 /* RV24 */
  45 //#define VLCGL_RGB_FORMAT GL_RGB
  46 //#define VLCGL_RGB_TYPE GL_UNSIGNED_BYTE
  47
  48 /* RV32 */
  49 #define VLCGL_RGB_FORMAT GL_RGBA
  50 #define VLCGL_RGB_TYPE GL_UNSIGNED_BYTE
  51
  52 /*****************************************************************************
  53  * Vout interface
  54  *****************************************************************************/
  55 static int  CreateVout   ( vlc_object_t * );
  56 static void DestroyVout  ( vlc_object_t * );
  57 static int  Init         ( vout_thread_t * );
  58 static void End          ( vout_thread_t * );
  59 static int  Manage       ( vout_thread_t * );
  60 static void Render       ( vout_thread_t *, picture_t * );
  61 static void DisplayVideo ( vout_thread_t *, picture_t * );
  62 static int  Control      ( vout_thread_t *, int, va_list );
  63
  64 static inline int GetAlignedSize( int );
  65
  66 /*****************************************************************************
  67  * Module descriptor
  68  *****************************************************************************/
  69 vlc_module_begin();
  70     set_description( _("OpenGL video output") );
  71     set_capability( "video output", 20 );
  72     add_shortcut( "opengl" );
  73     set_callbacks( CreateVout, DestroyVout );
  74 vlc_module_end();
  75
  76 /*****************************************************************************
  77  * vout_sys_t: video output method descriptor
  78  *****************************************************************************
  79  * This structure is part of the video output thread descriptor.
  80  * It describes the OpenGL specific properties of the output thread.
  81  *****************************************************************************/
  82 struct vout_sys_t
  83 {
  84     vout_thread_t *p_vout;
  85
  86     uint8_t     *p_buffer;
  87     int         i_index;
  88     int         i_tex_width;
  89     int         i_tex_height;
  90     GLuint      texture;
  91
  92     int         i_effect; //XXX
  93 };
  94
  95 /*****************************************************************************
  96  * CreateVout: This function allocates and initializes the OpenGL vout method.
  97  *****************************************************************************/
  98 static int CreateVout( vlc_object_t *p_this )
  99 {
 100     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 101     vout_sys_t *p_sys;
 102
 103     /* Allocate structure */
 104     p_vout->p_sys = p_sys = malloc( sizeof( vout_sys_t ) );
 105     if( p_sys == NULL )
 106     {
 107         msg_Err( p_vout, "out of memory" );
 108         return VLC_EGENERIC;
 109     }
 110
 111     //XXX set to 0 to disable the cube effect
 112     p_sys->i_effect = 1;
 113
 114     /* A texture must have a size aligned on a power of 2 */
 115     p_sys->i_tex_width  = GetAlignedSize( p_vout->render.i_width );
 116     p_sys->i_tex_height = GetAlignedSize( p_vout->render.i_height );
 117
 118     msg_Dbg( p_vout, "Texture size: %dx%d", p_sys->i_tex_width,
 119              p_sys->i_tex_height );
 120
 121     /* Get window */
 122     p_sys->p_vout =
 123         (vout_thread_t *)vlc_object_create( p_this, VLC_OBJECT_OPENGL );
 124     if( p_sys->p_vout == NULL )
 125     {
 126         msg_Err( p_vout, "out of memory" );
 127         return VLC_ENOMEM;
 128     }
 129     vlc_object_attach( p_sys->p_vout, p_this );
 130
 131     p_sys->p_vout->i_window_width = p_vout->i_window_width;
 132     p_sys->p_vout->i_window_height = p_vout->i_window_height;
 133     p_sys->p_vout->b_fullscreen = p_vout->b_fullscreen;
 134     p_sys->p_vout->render.i_width = p_vout->render.i_width;
 135     p_sys->p_vout->render.i_height = p_vout->render.i_height;
 136     p_sys->p_vout->render.i_aspect = p_vout->render.i_aspect;
 137
 138     p_sys->p_vout->p_module =
 139         module_Need( p_sys->p_vout, "opengl provider", NULL, 0 );
 140     if( p_sys->p_vout->p_module == NULL )
 141     {
 142         msg_Err( p_vout, "No OpenGL provider found" );
 143         vlc_object_detach( p_sys->p_vout );
 144         vlc_object_destroy( p_sys->p_vout );
 145         return VLC_ENOOBJ;
 146     }
 147
 148     p_vout->pf_init = Init;
 149     p_vout->pf_end = End;
 150     p_vout->pf_manage = Manage;
 151     p_vout->pf_render = Render;
 152     p_vout->pf_display = DisplayVideo;
 153     p_vout->pf_control = Control;
 154
 155     return VLC_SUCCESS;
 156 }
 157
 158 /*****************************************************************************
 159  * Init: initialize the OpenGL video thread output method
 160  *****************************************************************************/
 161 static int Init( vout_thread_t *p_vout )
 162 {
 163     vout_sys_t *p_sys = p_vout->p_sys;
 164     int i_pixel_pitch;
 165
 166     p_sys->p_vout->pf_init( p_sys->p_vout );
 167
 168     /* No YUV textures :( */
 169
 170 #if VLCGL_RGB_FORMAT == GL_RGB
 171 #   if VLCGL_RGB_TYPE == GL_UNSIGNED_BYTE
 172     p_vout->output.i_chroma = VLC_FOURCC('R','V','2','4');
 173     p_vout->output.i_rmask = 0x000000ff;
 174     p_vout->output.i_gmask = 0x0000ff00;
 175     p_vout->output.i_bmask = 0x00ff0000;
 176     i_pixel_pitch = 3;
 177 #   else
 178     p_vout->output.i_chroma = VLC_FOURCC('R','V','1','6');
 179     p_vout->output.i_rmask = 0xf800;
 180     p_vout->output.i_gmask = 0x07e0;
 181     p_vout->output.i_bmask = 0x001f;
 182     i_pixel_pitch = 2;
 183 #   endif
 184 #else
 185     p_vout->output.i_chroma = VLC_FOURCC('R','V','3','2');
 186     p_vout->output.i_rmask = 0x000000ff;
 187     p_vout->output.i_gmask = 0x0000ff00;
 188     p_vout->output.i_bmask = 0x00ff0000;
 189     i_pixel_pitch = 4;
 190 #endif
 191
 192     /* Since OpenGL can do rescaling for us, stick to the default
 193      * coordinates and aspect. */
 194     p_vout->output.i_width  = p_vout->render.i_width;
 195     p_vout->output.i_height = p_vout->render.i_height;
 196     p_vout->output.i_aspect = p_vout->render.i_aspect;
 197
 198     /* We know the chroma, allocate a buffer which will be used
 199      * directly by the decoder */
 200     p_vout->p_picture[0].i_planes = 1;
 201     p_sys->p_buffer =
 202         malloc( p_sys->i_tex_width * p_sys->i_tex_height * i_pixel_pitch );
 203     if( !p_sys->p_buffer )
 204     {
 205         msg_Err( p_vout, "Out of memory" );
 206         return -1;
 207     }
 208
 209     p_vout->p_picture[0].p->p_pixels = p_sys->p_buffer;
 210     p_vout->p_picture[0].p->i_lines = p_vout->output.i_height;
 211     p_vout->p_picture[0].p->i_pixel_pitch = i_pixel_pitch;
 212     p_vout->p_picture[0].p->i_pitch = p_sys->i_tex_width *
 213         p_vout->p_picture[0].p->i_pixel_pitch;
 214     p_vout->p_picture[0].p->i_visible_pitch = p_vout->output.i_width *
 215         p_vout->p_picture[0].p->i_pixel_pitch;
 216
 217     p_vout->p_picture[0].i_status = DESTROYED_PICTURE;
 218     p_vout->p_picture[0].i_type   = DIRECT_PICTURE;
 219
 220     PP_OUTPUTPICTURE[ 0 ] = &p_vout->p_picture[0];
 221     I_OUTPUTPICTURES = 1;
 222
 223     /* Set the texture parameters */
 224     glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR );
 225     glTexParameteri( GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR );
 226
 227     if( p_sys->i_effect )
 228     {
 229         glEnable( GL_CULL_FACE);
 230         /* glDisable( GL_DEPTH_TEST );
 231         glEnable( GL_BLEND );
 232         glBlendFunc( GL_SRC_ALPHA, GL_ONE );*/
 233
 234         /* Set the perpective */
 235         glMatrixMode( GL_PROJECTION );
 236         glLoadIdentity();
 237         glFrustum( -1.0, 1.0, -1.0, 1.0, 3.0, 20.0 );
 238         glMatrixMode( GL_MODELVIEW );
 239         glLoadIdentity();
 240         glTranslatef( 0.0, 0.0, - 5.0 );
 241     }
 242
 243     return 0;
 244 }
 245
 246 /*****************************************************************************
 247  * End: terminate GLX video thread output method
 248  *****************************************************************************/
 249 static void End( vout_thread_t *p_vout )
 250 {
 251     glFinish();
 252     glFlush();
 253 }
 254
 255 /*****************************************************************************
 256  * Destroy: destroy GLX video thread output method
 257  *****************************************************************************
 258  * Terminate an output method created by CreateVout
 259  *****************************************************************************/
 260 static void DestroyVout( vlc_object_t *p_this )
 261 {
 262     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 263     vout_sys_t *p_sys = p_vout->p_sys;
 264
 265     module_Unneed( p_sys->p_vout, p_sys->p_vout->p_module );
 266     vlc_object_detach( p_sys->p_vout );
 267     vlc_object_destroy( p_sys->p_vout );
 268
 269     /* Free the texture buffer*/
 270     if( p_sys->p_buffer ) free( p_sys->p_buffer );
 271
 272     free( p_sys );
 273 }
 274
 275 /*****************************************************************************
 276  * Manage: handle Sys events
 277  *****************************************************************************
 278  * This function should be called regularly by video output thread. It returns
 279  * a non null value if an error occured.
 280  *****************************************************************************/
 281 static int Manage( vout_thread_t *p_vout )
 282 {
 283     vout_sys_t *p_sys = p_vout->p_sys;
 284     return p_sys->p_vout->pf_manage( p_sys->p_vout );
 285 }
 286
 287 /*****************************************************************************
 288  * Render: render previously calculated output
 289  *****************************************************************************/
 290 static void Render( vout_thread_t *p_vout, picture_t *p_pic )
 291 {
 292     vout_sys_t *p_sys = p_vout->p_sys;
 293     float f_width = (float)p_vout->output.i_width / p_sys->i_tex_width;
 294     float f_height = (float)p_vout->output.i_height / p_sys->i_tex_height;
 295
 296     glClear( GL_COLOR_BUFFER_BIT );
 297
 298     glTexImage2D( GL_TEXTURE_2D, 0, 3,
 299                   p_sys->i_tex_width, p_sys->i_tex_height , 0,
 300                   VLCGL_RGB_FORMAT, VLCGL_RGB_TYPE, p_sys->p_buffer );
 301
 302     if( !p_sys->i_effect )
 303     {
 304         glEnable( GL_TEXTURE_2D );
 305         glBegin( GL_POLYGON );
 306         glTexCoord2f( 0.0, 0.0 ); glVertex2f( -1.0, 1.0 );
 307         glTexCoord2f( f_width, 0.0 ); glVertex2f( 1.0, 1.0 );
 308         glTexCoord2f( f_width, f_height ); glVertex2f( 1.0, -1.0 );
 309         glTexCoord2f( 0.0, f_height ); glVertex2f( -1.0, -1.0 );
 310         glEnd();
 311     }
 312     else
 313     {
 314         glRotatef( 1.0, 0.3, 0.5, 0.7 );
 315
 316         glEnable( GL_TEXTURE_2D );
 317         glBegin( GL_QUADS );
 318
 319         /* Front */
 320         glTexCoord2f( 0, 0 ); glVertex3f( - 1.0, 1.0, 1.0 );
 321         glTexCoord2f( 0, f_height ); glVertex3f( - 1.0, - 1.0, 1.0 );
 322         glTexCoord2f( f_width, f_height ); glVertex3f( 1.0, - 1.0, 1.0 );
 323         glTexCoord2f( f_width, 0 ); glVertex3f( 1.0, 1.0, 1.0 );
 324
 325         /* Left */
 326         glTexCoord2f( 0, 0 ); glVertex3f( - 1.0, 1.0, - 1.0 );
 327         glTexCoord2f( 0, f_height ); glVertex3f( - 1.0, - 1.0, - 1.0 );
 328         glTexCoord2f( f_width, f_height ); glVertex3f( - 1.0, - 1.0, 1.0 );
 329         glTexCoord2f( f_width, 0 ); glVertex3f( - 1.0, 1.0, 1.0 );
 330
 331         /* Back */
 332         glTexCoord2f( 0, 0 ); glVertex3f( 1.0, 1.0, - 1.0 );
 333         glTexCoord2f( 0, f_height ); glVertex3f( 1.0, - 1.0, - 1.0 );
 334         glTexCoord2f( f_width, f_height ); glVertex3f( - 1.0, - 1.0, - 1.0 );
 335         glTexCoord2f( f_width, 0 ); glVertex3f( - 1.0, 1.0, - 1.0 );
 336
 337         /* Right */
 338         glTexCoord2f( 0, 0 ); glVertex3f( 1.0, 1.0, 1.0 );
 339         glTexCoord2f( 0, f_height ); glVertex3f( 1.0, - 1.0, 1.0 );
 340         glTexCoord2f( f_width, f_height ); glVertex3f( 1.0, - 1.0, - 1.0 );
 341         glTexCoord2f( f_width, 0 ); glVertex3f( 1.0, 1.0, - 1.0 );
 342
 343         /* Top */
 344         glTexCoord2f( 0, 0 ); glVertex3f( - 1.0, 1.0, - 1.0 );
 345         glTexCoord2f( 0, f_height ); glVertex3f( - 1.0, 1.0, 1.0 );
 346         glTexCoord2f( f_width, f_height ); glVertex3f( 1.0, 1.0, 1.0 );
 347         glTexCoord2f( f_width, 0 ); glVertex3f( 1.0, 1.0, - 1.0 );
 348
 349         /* Bottom */
 350         glTexCoord2f( 0, 0 ); glVertex3f( - 1.0, - 1.0, 1.0 );
 351         glTexCoord2f( 0, f_height ); glVertex3f( - 1.0, - 1.0, - 1.0 );
 352         glTexCoord2f( f_width, f_height ); glVertex3f( 1.0, - 1.0, - 1.0 );
 353         glTexCoord2f( f_width, 0 ); glVertex3f( 1.0, - 1.0, 1.0 );
 354         glEnd();
 355     }
 356
 357     glDisable( GL_TEXTURE_2D);
 358 }
 359
 360 /*****************************************************************************
 361  * DisplayVideo: displays previously rendered output
 362  *****************************************************************************/
 363 static void DisplayVideo( vout_thread_t *p_vout, picture_t *p_pic )
 364 {
 365     vout_sys_t *p_sys = p_vout->p_sys;
 366     p_sys->p_vout->pf_swap( p_sys->p_vout );
 367 }
 368
 369 int GetAlignedSize( int i_size )
 370 {
 371     /* Return the nearest power of 2 */
 372     int i_result = 1;
 373     while( i_result < i_size )
 374     {
 375         i_result *= 2;
 376     }
 377     return i_result;
 378 }
 379
 380 /*****************************************************************************
 381  * Control: control facility for the vout
 382  *****************************************************************************/
 383 static int Control( vout_thread_t *p_vout, int i_query, va_list args )
 384 {
 385     vout_sys_t *p_sys = p_vout->p_sys;
 386
 387     if( p_sys->p_vout->pf_control )
 388         return p_sys->p_vout->pf_control( p_sys->p_vout, i_query, args );
 389     else
 390         return vout_vaControlDefault( p_vout, i_query, args );
 391 }