modules/video_output/hd1000v.cpp

   1 /*****************************************************************************
   2  * hd1000v.cpp: HD1000 video output display method
   3  *****************************************************************************
   4  * Copyright (C) 2004 the VideoLAN team
   5  * $Id$
   6  *
   7  * Authors: Jean-Paul Saman <jpsaman _at_ videolan _dot_ org>
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License as published by
  11  * the Free Software Foundation; either version 2 of the License, or
  12  * (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  * GNU General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License
  20  * along with this program; if not, write to the Free Software
  21  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
  22  *****************************************************************************/
  23
  24 /*****************************************************************************
  25  * Preamble
  26  *****************************************************************************/
  27 extern "C" {
  28 #ifdef HAVE_CONFIG_H
  29 # include "config.h"
  30 #endif
  31
  32 #include <vlc_common.h>
  33 #include <vlc_plugin.h>
  34 #include <vlc_vout.h>
  35 #include <vlc_playlist.h>
  36 }
  37
  38 #include <cascade/graphics/CascadeBitmap.h>
  39 #include <cascade/graphics/CascadeScreen.h>
  40
  41 /*****************************************************************************
  42  * Local prototypes
  43  *****************************************************************************/
  44 static int  Create    ( vlc_object_t * );
  45 static void Destroy   ( vlc_object_t * );
  46
  47 static int  Init      ( vout_thread_t * );
  48 static void End       ( vout_thread_t * );
  49 static void Display   ( vout_thread_t *, picture_t * );
  50
  51 static int NewPicture ( vout_thread_t *, picture_t * );
  52 static void FreePicture( vout_thread_t *, picture_t * );
  53
  54 /*****************************************************************************
  55  * Module descriptor
  56  *****************************************************************************/
  57 vlc_module_begin ()
  58     set_description( N_("HD1000 video output") )
  59     set_capability( "video output", 100 )
  60     add_shortcut( "hd1000v" )
  61     set_callbacks( Create, Destroy )
  62 vlc_module_end ()
  63
  64 /*****************************************************************************
  65  * vout_sys_t: video output method descriptor
  66  *****************************************************************************
  67  * This structure is part of the video output thread descriptor.
  68  * It describes the aa specific properties of an output thread.
  69  *****************************************************************************/
  70 struct vout_sys_t
  71 {
  72     uint32_t            i_width;                     /* width of main window */
  73     uint32_t            i_height;                   /* height of main window */
  74     uint32_t            i_screen_depth;
  75     bool          b_double_buffered;
  76
  77     uint32_t            u_current; /* Current output resolution. */
  78     CascadeScreen      *p_screen;
  79 };
  80
  81 struct picture_sys_t
  82 {
  83     CascadeSharedMemZone *p_image;
  84 };
  85
  86 /*****************************************************************************
  87  * Create: allocates video thread output method
  88  *****************************************************************************
  89  * This function allocates and initializes a aa vout method.
  90  *****************************************************************************/
  91 static int Create( vlc_object_t *p_this )
  92 {
  93     vout_thread_t *p_vout = (vout_thread_t *)p_this;
  94     bool b_double_buffered = false;
  95
  96     p_vout->p_sys = (struct vout_sys_t*) malloc( sizeof(struct vout_sys_t) );
  97     if( p_vout->p_sys == NULL )
  98         return VLC_ENOMEM;
  99
 100     /* Allocate a screen for VLC vout. */
 101     p_vout->p_sys->p_screen = new CascadeScreen();
 102     if( p_vout->p_sys->p_screen == NULL )
 103     {
 104         msg_Err( p_vout, "unable to allocate screen" );
 105         free( p_vout->p_sys );
 106         return VLC_EGENERIC;
 107     }
 108
 109     p_vout->pf_init = Init;
 110     p_vout->pf_end = End;
 111     p_vout->pf_manage = NULL;
 112     p_vout->pf_render = NULL;
 113     p_vout->pf_display = Display;
 114
 115     /* Get current screen resolution */
 116     msg_Dbg( p_vout, "number of screen resolutions supported %u",
 117       p_vout->p_sys->p_screen->GetNumScreenResolutionsSupported() );
 118
 119     p_vout->p_sys->p_screen->GetCurrentScreenResolution( (u32) p_vout->p_sys->u_current );
 120     p_vout->p_sys->p_screen->SetScreenResolution( (u32) p_vout->p_sys->u_current );
 121
 122 #if 1
 123     msg_Dbg( p_vout, "available screen resolutions:" );
 124     for (u32 i=0; i<p_vout->p_sys->p_screen->GetNumScreenResolutionsSupported(); i++)
 125     {
 126         u32 i_width=0;
 127     u32 i_height=0;
 128     u8 i_screen_depth=0;
 129     bool b_buffered;
 130
 131         p_vout->p_sys->p_screen->GetSupportedScreenResolutionAt( i,
 132             i_width, i_height, i_screen_depth, b_buffered);
 133         msg_Dbg( p_vout, "  screen index = %u, width = %u, height = %u, depth = %u, double buffered = %s",
 134             i, i_width, i_height, i_screen_depth, (b_buffered ? "yes" : "no") );
 135     }
 136 #endif
 137
 138     p_vout->p_sys->p_screen->GetSupportedScreenResolutionAt( (u32) p_vout->p_sys->u_current,
 139             (u32) p_vout->p_sys->i_width,
 140             (u32) p_vout->p_sys->i_height,
 141             (u8) p_vout->p_sys->i_screen_depth,
 142             b_double_buffered );
 143     p_vout->p_sys->b_double_buffered = (bool) b_double_buffered;
 144     msg_Dbg( p_vout, "using screen index = %u, width = %u, height = %u, depth = %u, double buffered = %d",
 145             p_vout->p_sys->u_current, /* Current screen. */
 146             p_vout->p_sys->i_width,
 147             p_vout->p_sys->i_height,
 148             p_vout->p_sys->i_screen_depth,
 149             p_vout->p_sys->b_double_buffered );
 150
 151     return VLC_SUCCESS;
 152 }
 153
 154 static void Destroy( vlc_object_t *p_this )
 155 {
 156     vout_thread_t *p_vout = (vout_thread_t *)p_this;
 157
 158     delete p_vout->p_sys->p_screen;
 159     free( p_vout->p_sys );
 160 }
 161
 162 /*****************************************************************************
 163  * Init: initialize video thread output method
 164  *****************************************************************************/
 165 static int Init( vout_thread_t *p_vout )
 166 {
 167     int i_index;
 168     picture_t *p_pic = NULL;
 169
 170     I_OUTPUTPICTURES = 0;
 171
 172     p_vout->output.i_chroma = VLC_CODEC_RGB8;
 173     p_vout->output.i_width = p_vout->p_sys->i_width;
 174     p_vout->output.i_height = p_vout->p_sys->i_height;
 175     p_vout->output.i_aspect = p_vout->p_sys->i_width
 176                                * VOUT_ASPECT_FACTOR / p_vout->p_sys->i_height;
 177
 178     /* Only RGBA 32bpp is supported by output device. */
 179     switch( p_vout->p_sys->i_screen_depth )
 180     {
 181         case 8: /* FIXME: set the palette */
 182             p_vout->output.i_chroma = VLC_CODEC_RGB8; break;
 183         case 15:
 184             p_vout->output.i_chroma = VLC_CODEC_RGB15; break;
 185         case 16:
 186             p_vout->output.i_chroma = VLC_CODEC_RGB16; break;
 187         case 24:
 188             p_vout->output.i_chroma = VLC_CODEC_RGB24; break;
 189         case 32:
 190             p_vout->output.i_chroma = VLC_CODEC_RGB32; break;
 191         default:
 192             msg_Err( p_vout, "unknown screen depth %i",
 193                      p_vout->p_sys->i_screen_depth );
 194             return VLC_SUCCESS;
 195     }
 196
 197     /* Find an empty picture slot */
 198     for( i_index = 0 ; i_index < VOUT_MAX_PICTURES ; i_index++ )
 199     {
 200         if( p_vout->p_picture[ i_index ].i_status == FREE_PICTURE )
 201         {
 202             p_pic = p_vout->p_picture + i_index;
 203             break;
 204         }
 205     }
 206
 207     if( p_pic == NULL || NewPicture( p_vout, p_pic ) )
 208     {
 209         return -1;
 210     }
 211
 212     /* Allocate the picture */
 213     p_pic->p->i_lines = p_vout->p_sys->i_height;
 214     p_pic->p->i_visible_lines = p_vout->p_sys->i_height;
 215     p_pic->p->i_pitch = p_vout->p_sys->i_width;
 216     p_pic->p->i_pixel_pitch = 1;
 217     p_pic->p->i_visible_pitch = p_vout->p_sys->i_width;
 218     p_pic->i_planes = 1;
 219
 220     p_pic->i_status = DESTROYED_PICTURE;
 221     p_pic->i_type   = DIRECT_PICTURE;
 222
 223     PP_OUTPUTPICTURE[ I_OUTPUTPICTURES ] = p_pic;
 224     I_OUTPUTPICTURES++;
 225
 226     return VLC_SUCCESS;
 227 }
 228
 229 /*****************************************************************************
 230  * End: terminate video thread output method
 231  *****************************************************************************/
 232 static void End( vout_thread_t *p_vout )
 233 {
 234     int i_index;
 235
 236     /* Free the direct buffers we allocated */
 237     for( i_index = I_OUTPUTPICTURES ; i_index ; )
 238     {
 239         i_index--;
 240         FreePicture( p_vout, PP_OUTPUTPICTURE[ i_index ] );
 241     }
 242 }
 243
 244 /*****************************************************************************
 245  * NewPicture: Allocate shared memory zone for video output
 246  *****************************************************************************/
 247 static int NewPicture( vout_thread_t *p_vout, picture_t *p_pic )
 248 {
 249     CascadeDims p_dims = p_vout->p_sys->p_screen->GetDims();
 250
 251     p_pic->p_sys = (picture_sys_t *) malloc( sizeof( picture_sys_t ) );
 252     if( p_pic->p_sys == NULL )
 253     {
 254         return -1;
 255     }
 256
 257     /* Fill in picture_t fields */
 258     picture_Setup( p_pic, p_vout->output.i_chroma,
 259                    p_vout->output.i_width, p_vout->output.i_height,
 260                    p_vout->output.i_aspect * p_vout->output.i_height,
 261                    VOUT_ASPECT_FACTOR      * p_vout->output.i_width );
 262
 263     p_pic->p_sys->p_image = new CascadeSharedMemZone();
 264     if( p_pic->p_sys->p_image == NULL )
 265     {
 266         free( p_pic->p_sys );
 267         return -1;
 268     }
 269
 270     if( p_pic->p_sys->p_image->Open( "vlc_hd1000v", p_vout->output.i_width *
 271             p_vout->output.i_height * p_vout->p_sys->i_screen_depth,
 272             true ) )
 273     {
 274         msg_Err( p_vout, "failed to allocate shared memory" );
 275         free( p_pic->p_sys );
 276         return -1;
 277     }
 278
 279     p_pic->p->i_lines = p_vout->output.i_height;
 280     p_pic->p->i_visible_lines = p_vout->output.i_height;
 281     p_pic->p->p_pixels = (uint8_t*) p_pic->p_sys->p_image->MapLock();
 282     p_pic->p->i_pitch = p_vout->p_sys->i_screen_depth;
 283     p_pic->p->i_visible_pitch = p_pic->p->i_pixel_pitch
 284                                  * p_vout->output.i_width;
 285
 286     return VLC_SUCCESS;
 287 }
 288
 289 /*****************************************************************************
 290  * FreePicture: destroy a picture allocated with NewPicture
 291  *****************************************************************************
 292  * Destroy SharedMemZoned AND associated data. The picture normally will be
 293  * unlocked in the Display() function except when the video output is closed
 294  * before the picture is displayed.
 295  *****************************************************************************/
 296 static void FreePicture( vout_thread_t *p_vout, picture_t *p_pic )
 297 {
 298     if( p_pic->p_sys->p_image->Unlock() )
 299     { /* Just a test to see the effect described above. REMOVE THIS */
 300         msg_Err( p_vout, "unlocking shared memory failed, already unlocked" );
 301     }
 302
 303     if( p_pic->p_sys->p_image->Close() )
 304     {
 305         msg_Err( p_vout, "closing shared memory failed. Leaking memory of %ul",
 306                     p_pic->p_sys->p_image->GetSize() );
 307     }
 308
 309     delete p_pic->p_sys->p_image;
 310     free( p_pic->p_sys );
 311 }
 312
 313 /*****************************************************************************
 314  * Display: Map p_image onto the screen
 315  *****************************************************************************/
 316 static void Display( vout_thread_t *p_vout, picture_t *p_pic )
 317 {
 318     uint32_t i_width, i_height, i_x, i_y;
 319     uint32_t i_offset = 0;
 320
 321     vout_PlacePicture( p_vout, p_vout->p_sys->i_width,
 322                        p_vout->p_sys->i_height,
 323                        &i_x, &i_y, &i_width, &i_height );
 324     msg_Dbg( p_vout, "PlacePicture at x_left = %d, y_left = %d, x_bottom = %d, y_bottom = %d",
 325                 i_x, i_y, i_width, i_height );
 326
 327     /* Currently the only pixel format supported is 32bpp RGBA.*/
 328     p_vout->p_sys->p_screen->LockScreen();
 329
 330     /* Unlock the shared memory region first. */
 331     if( p_pic->p_sys->p_image->Unlock() )
 332     {
 333         msg_Err( p_vout, "unlocking shared memory failed. Expect threading problems." );
 334     }
 335
 336     p_vout->p_sys->p_screen->Blit( CascadePoint( (u32) i_x, (u32) i_y ), /* Place bitmap at */
 337             (*p_pic->p_sys->p_image)   ,                                      /* Image data */
 338             (u32) i_offset,                                   /* Offset in SharedMemoryZone */
 339             (u32) i_width,                                           /* Source bitmap width */
 340             (u32) i_height,                                         /* Source bitmap height */
 341             (u32) p_vout->p_sys->i_screen_depth,                      /* Source pixel depth */
 342             CascadeRect( (u32) i_x, (u32) i_y, (u32) i_width, (u32) i_height ) );
 343
 344     p_vout->p_sys->p_screen->UnlockScreen();
 345 }