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