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ggi.c
资源名称：vlc-0.8.1.tar.gz　[点击查看]
上传用户：riyaled888
上传日期：2009-03-27
资源大小：7338k
文件大小：18k
源码类别：

多媒体

开发平台：

MultiPlatform

ggi.c：源码内容
  1. /*****************************************************************************
  2.  * ggi.c : GGI plugin for vlc
  3.  *****************************************************************************
  4.  * Copyright (C) 2000, 2001 VideoLAN
  5.  * $Id: ggi.c 8551 2004-08-28 17:36:02Z gbazin $
  6.  *
  7.  * Authors: Vincent Seguin <seguin@via.ecp.fr>
  8.  *          Samuel Hocevar <sam@zoy.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.  *****************************************************************************/
  25. /*****************************************************************************
  26.  * Preamble
  27.  *****************************************************************************/
  28. #include <stdlib.h>                                      /* malloc(), free() */
  29. #include <string.h>
  30. #include <errno.h>                                                 /* ENOMEM */
  32. #include <ggi/ggi.h>
  34. #include <vlc/vlc.h>
  35. #include <vlc/intf.h>
  36. #include <vlc/vout.h>
  38. /*****************************************************************************
  39.  * Local prototypes
  40.  *****************************************************************************/
  41. static int  Create    ( vlc_object_t * );
  42. static void Destroy   ( vlc_object_t * );
  44. static int  Init      ( vout_thread_t * );
  45. static void End       ( vout_thread_t * );
  46. static int  Manage    ( vout_thread_t * );
  47. static void Display   ( vout_thread_t *, picture_t * );
  49. static int  OpenDisplay    ( vout_thread_t * );
  50. static void CloseDisplay   ( vout_thread_t * );
  51. static void SetPalette     ( vout_thread_t *, uint16_t *, uint16_t *, uint16_t * );
  53. /*****************************************************************************
  54.  * Module descriptor
  55.  *****************************************************************************/
  56. #define DISPLAY_TEXT N_("X11 display name")
  57. #define DISPLAY_LONGTEXT N_( 
  58.             "Specify the X11 hardware display you want to use.n" 
  59.             "By default, VLC will use the value of the DISPLAY " 
  60.             "environment variable.")
  62. vlc_module_begin();
  63.     add_string( "ggi-display", NULL, NULL, DISPLAY_TEXT, DISPLAY_LONGTEXT, VLC_TRUE );
  64.     set_description( "General Graphics Interface video output" );
  65.     set_capability( "video output", 30 );
  66.     set_callbacks( Create, Destroy );
  67. vlc_module_end();
  69. /*****************************************************************************
  70.  * vout_sys_t: video output GGI method descriptor
  71.  *****************************************************************************
  72.  * This structure is part of the video output thread descriptor.
  73.  * It describes the GGI specific properties of an output thread.
  74.  *****************************************************************************/
  75. struct vout_sys_t
  76. {
  77.     /* GGI system information */
  78.     ggi_visual_t        p_display;                         /* display device */
  80.     ggi_mode            mode;                             /* mode descriptor */
  81.     int                 i_bits_per_pixel;
  83.     /* Buffer information */
  84.     ggi_directbuffer *  pp_buffer[2];                             /* buffers */
  85.     int                 i_index;
  87.     vlc_bool_t          b_must_acquire;   /* must be acquired before writing */
  88. };
  90. /*****************************************************************************
  91.  * Create: allocate GGI video thread output method
  92.  *****************************************************************************
  93.  * This function allocate and initialize a GGI vout method. It uses some of the
  94.  * vout properties to choose the correct mode, and change them according to the
  95.  * mode actually used.
  96.  *****************************************************************************/
  97. static int Create( vlc_object_t *p_this )
  98. {
  99.     vout_thread_t *p_vout = (vout_thread_t *)p_this;
  101.     /* Allocate structure */
  102.     p_vout->p_sys = malloc( sizeof( vout_sys_t ) );
  103.     if( p_vout->p_sys == NULL )
  104.     {
  105.         msg_Err( p_vout, "out of memory" );
  106.         return( 1 );
  107.     }
  109.     /* Open and initialize device */
  110.     if( OpenDisplay( p_vout ) )
  111.     {
  112.         msg_Err( p_vout, "cannot initialize GGI display" );
  113.         free( p_vout->p_sys );
  114.         return( 1 );
  115.     }
  117.     p_vout->pf_init = Init;
  118.     p_vout->pf_end = End;
  119.     p_vout->pf_manage = Manage;
  120.     p_vout->pf_render = NULL;
  121.     p_vout->pf_display = Display;
  123.     return( 0 );
  124. }
  126. /*****************************************************************************
  127.  * Init: initialize GGI video thread output method
  128.  *****************************************************************************
  129.  * This function initialize the GGI display device.
  130.  *****************************************************************************/
  131. static int Init( vout_thread_t *p_vout )
  132. {
  133. #define p_b p_vout->p_sys->pp_buffer
  134.     int i_index;
  135.     picture_t *p_pic;
  137.     I_OUTPUTPICTURES = 0;
  139.     p_vout->output.i_width  = p_vout->p_sys->mode.visible.x;
  140.     p_vout->output.i_height = p_vout->p_sys->mode.visible.y;
  141.     p_vout->output.i_aspect = p_vout->p_sys->mode.visible.x
  142.                                * VOUT_ASPECT_FACTOR
  143.                                / p_vout->p_sys->mode.visible.y;
  145.     switch( p_vout->p_sys->i_bits_per_pixel )
  146.     {
  147.         case 8:
  148.             p_vout->output.i_chroma = VLC_FOURCC('R','G','B','2');
  149.             p_vout->output.pf_setpalette = SetPalette;
  150.             break;
  151.         case 15:
  152.             p_vout->output.i_chroma = VLC_FOURCC('R','V','1','5'); break;
  153.         case 16:
  154.             p_vout->output.i_chroma = VLC_FOURCC('R','V','1','6'); break;
  155.         case 24:
  156.             p_vout->output.i_chroma = VLC_FOURCC('R','V','2','4'); break;
  157.         case 32:
  158.             p_vout->output.i_chroma = VLC_FOURCC('R','V','3','2'); break;
  159.         default:
  160.             msg_Err( p_vout, "unknown screen depth %i",
  161.                      p_vout->p_sys->i_bits_per_pixel );
  162.             return 0;
  163.     }
  165.     /* Only useful for bits_per_pixel != 8 */
  166.     p_vout->output.i_rmask = p_b[ 0 ]->buffer.plb.pixelformat->red_mask;
  167.     p_vout->output.i_gmask = p_b[ 0 ]->buffer.plb.pixelformat->green_mask;
  168.     p_vout->output.i_bmask = p_b[ 0 ]->buffer.plb.pixelformat->blue_mask;
  170.     p_pic = NULL;
  172.     /* Find an empty picture slot */
  173.     for( i_index = 0 ; i_index < VOUT_MAX_PICTURES ; i_index++ )
  174.     {
  175.         if( p_vout->p_picture[ i_index ].i_status == FREE_PICTURE )
  176.         {
  177.             p_pic = p_vout->p_picture + i_index;
  178.             break;
  179.         }
  180.     }
  182.     if( p_pic == NULL )
  183.     {
  184.         return 0;
  185.     }
  187.     /* We know the chroma, allocate a buffer which will be used
  188.      * directly by the decoder */
  189.     p_vout->p_sys->i_index = 0;
  190.     p_pic->p->p_pixels = p_b[ 0 ]->write;
  191.     p_pic->p->i_pixel_pitch = p_b[ 0 ]->buffer.plb.pixelformat->size / 8;
  192.     p_pic->p->i_lines = p_vout->p_sys->mode.visible.y;
  193.     p_pic->p->i_visible_lines = p_vout->p_sys->mode.visible.y;
  195.     p_pic->p->i_pitch = p_b[ 0 ]->buffer.plb.stride;
  197.     if( p_b[ 0 ]->buffer.plb.pixelformat->size / 8
  198.          * p_vout->p_sys->mode.visible.x
  199.         != p_b[ 0 ]->buffer.plb.stride )
  200.     {
  201.         p_pic->p->i_visible_pitch = p_b[ 0 ]->buffer.plb.pixelformat->size
  202.                                      / 8 * p_vout->p_sys->mode.visible.x;
  203.     }
  204.     else
  205.     {
  206.         p_pic->p->i_visible_pitch = p_b[ 0 ]->buffer.plb.stride;
  207.     }
  209.     p_pic->i_planes = 1;
  211.     p_pic->i_status = DESTROYED_PICTURE;
  212.     p_pic->i_type   = DIRECT_PICTURE;
  214.     PP_OUTPUTPICTURE[ I_OUTPUTPICTURES ] = p_pic;
  216.     I_OUTPUTPICTURES++;
  218.     /* Acquire first buffer */
  219.     if( p_vout->p_sys->b_must_acquire )
  220.     {
  221.         ggiResourceAcquire( p_b[ 0 ]->resource,
  222.                             GGI_ACTYPE_WRITE );
  223.     }
  225.     /* Listen to the keyboard and the mouse buttons */
  226.     ggiSetEventMask( p_vout->p_sys->p_display,
  227.                      emKeyboard | emPtrButtonPress | emPtrButtonRelease );
  229.     /* Set asynchronous display mode -- usually quite faster */
  230.     ggiAddFlags( p_vout->p_sys->p_display, GGIFLAG_ASYNC );
  232.     return( 0 );
  233. #undef p_b
  234. }
  236. /*****************************************************************************
  237.  * End: terminate GGI video thread output method
  238.  *****************************************************************************
  239.  * Terminate an output method created by Create
  240.  *****************************************************************************/
  241. static void End( vout_thread_t *p_vout )
  242. {
  243. #define p_b p_vout->p_sys->pp_buffer
  244.     /* Release buffer */
  245.     if( p_vout->p_sys->b_must_acquire )
  246.     {
  247.         ggiResourceRelease( p_b[ p_vout->p_sys->i_index ]->resource );
  248.     }
  249. #undef p_b
  250. }
  252. /*****************************************************************************
  253.  * Destroy: destroy GGI video thread output method
  254.  *****************************************************************************
  255.  * Terminate an output method created by Create
  256.  *****************************************************************************/
  257. static void Destroy( vlc_object_t *p_this )
  258. {
  259.     vout_thread_t *p_vout = (vout_thread_t *)p_this;
  261.     CloseDisplay( p_vout );
  263.     free( p_vout->p_sys );
  264. }
  266. /*****************************************************************************
  267.  * Manage: handle GGI 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.     struct timeval tv = { 0, 1000 };                        /* 1 millisecond */
  275.     gii_event_mask mask;
  276.     gii_event      event;
  277.     vlc_value_t    val;
  279.     mask = emKeyboard | emPtrButtonPress | emPtrButtonRelease;
  281.     ggiEventPoll( p_vout->p_sys->p_display, mask, &tv );
  283.     while( ggiEventsQueued( p_vout->p_sys->p_display, mask) )
  284.     {
  285.         ggiEventRead( p_vout->p_sys->p_display, &event, mask);
  287.         switch( event.any.type )
  288.         {
  289.             case evKeyRelease:
  291.                 switch( event.key.sym )
  292.                 {
  293.                     case 'q':
  294.                     case 'Q':
  295.                     case GIIUC_Escape:
  296.                         p_vout->p_vlc->b_die = 1;
  297.                         break;
  299.                     default:
  300.                         break;
  301.                 }
  302.                 break;
  304.             case evPtrButtonRelease:
  306.                 switch( event.pbutton.button )
  307.                 {
  308.                     case GII_PBUTTON_LEFT:
  309.                         val.b_bool = VLC_TRUE;
  310.                         var_Set( p_vout, "mouse-clicked", val );
  311.                         break;
  313.                     case GII_PBUTTON_RIGHT:
  314.                         {
  315.                             intf_thread_t *p_intf;
  316.                             p_intf = vlc_object_find( p_vout, VLC_OBJECT_INTF,
  317.                                                               FIND_ANYWHERE );
  318.                             if( p_intf )
  319.                             {
  320.                                 p_intf->b_menu_change = 1;
  321.                                 vlc_object_release( p_intf );
  322.                             }
  323.                         }
  324.                         break;
  325.                 }
  326.                 break;
  328.             default:
  329.                 break;
  330.         }
  331.     }
  333.     return( 0 );
  334. }
  336. /*****************************************************************************
  337.  * Display: displays previously rendered output
  338.  *****************************************************************************/
  339. static void Display( vout_thread_t *p_vout, picture_t *p_pic )
  340. {
  341. #define p_b p_vout->p_sys->pp_buffer
  342.     p_pic->p->p_pixels = p_b[ p_vout->p_sys->i_index ]->write;
  344.     /* Change display frame */
  345.     if( p_vout->p_sys->b_must_acquire )
  346.     {
  347.         ggiResourceRelease( p_b[ p_vout->p_sys->i_index ]->resource );
  348.     }
  349.     ggiSetDisplayFrame( p_vout->p_sys->p_display,
  350.                         p_b[ p_vout->p_sys->i_index ]->frame );
  352.     /* Swap buffers and change write frame */
  353.     p_vout->p_sys->i_index ^= 1;
  354.     p_pic->p->p_pixels = p_b[ p_vout->p_sys->i_index ]->write;
  356.     if( p_vout->p_sys->b_must_acquire )
  357.     {
  358.         ggiResourceAcquire( p_b[ p_vout->p_sys->i_index ]->resource,
  359.                             GGI_ACTYPE_WRITE );
  360.     }
  361.     ggiSetWriteFrame( p_vout->p_sys->p_display,
  362.                       p_b[ p_vout->p_sys->i_index ]->frame );
  364.     /* Flush the output so that it actually displays */
  365.     ggiFlush( p_vout->p_sys->p_display );
  366. #undef p_b
  367. }
  369. /* following functions are local */
  371. /*****************************************************************************
  372.  * OpenDisplay: open and initialize GGI device
  373.  *****************************************************************************
  374.  * Open and initialize display according to preferences specified in the vout
  375.  * thread fields.
  376.  *****************************************************************************/
  377. static int OpenDisplay( vout_thread_t *p_vout )
  378. {
  379. #define p_b p_vout->p_sys->pp_buffer
  380.     ggi_color   col_fg;                                  /* foreground color */
  381.     ggi_color   col_bg;                                  /* background color */
  382.     int         i_index;                               /* all purposes index */
  383.     char        *psz_display;
  385.     /* Initialize library */
  386.     if( ggiInit() )
  387.     {
  388.         msg_Err( p_vout, "cannot initialize GGI library" );
  389.         return( 1 );
  390.     }
  392.     /* Open display */
  393.     psz_display = config_GetPsz( p_vout, "ggi_display" );
  395.     p_vout->p_sys->p_display = ggiOpen( psz_display, NULL );
  396.     if( psz_display ) free( psz_display );
  398.     if( p_vout->p_sys->p_display == NULL )
  399.     {
  400.         msg_Err( p_vout, "cannot open GGI default display" );
  401.         ggiExit();
  402.         return( 1 );
  403.     }
  405.     /* Find most appropriate mode */
  406.     p_vout->p_sys->mode.frames =    2;                          /* 2 buffers */
  407.     p_vout->p_sys->mode.visible.x = config_GetInt( p_vout, "width" );
  408.     p_vout->p_sys->mode.visible.y = config_GetInt( p_vout, "height" );
  409.     p_vout->p_sys->mode.virt.x =    GGI_AUTO;
  410.     p_vout->p_sys->mode.virt.y =    GGI_AUTO;
  411.     p_vout->p_sys->mode.size.x =    GGI_AUTO;
  412.     p_vout->p_sys->mode.size.y =    GGI_AUTO;
  413.     p_vout->p_sys->mode.graphtype = GT_15BIT;        /* minimum usable depth */
  414.     p_vout->p_sys->mode.dpp.x =     GGI_AUTO;
  415.     p_vout->p_sys->mode.dpp.y =     GGI_AUTO;
  416.     ggiCheckMode( p_vout->p_sys->p_display, &p_vout->p_sys->mode );
  418.     /* FIXME: Check that returned mode has some minimum properties */
  420.     /* Set mode */
  421.     if( ggiSetMode( p_vout->p_sys->p_display, &p_vout->p_sys->mode ) )
  422.     {
  423.         msg_Err( p_vout, "cannot set GGI mode" );
  424.         ggiClose( p_vout->p_sys->p_display );
  425.         ggiExit();
  426.         return( 1 );
  427.     }
  429.     /* Check buffers properties */
  430.     p_vout->p_sys->b_must_acquire = 0;
  431.     for( i_index = 0; i_index < 2; i_index++ )
  432.     {
  433.         /* Get buffer address */
  434.         p_vout->p_sys->pp_buffer[ i_index ] =
  435.             (ggi_directbuffer *)ggiDBGetBuffer( p_vout->p_sys->p_display,
  436.                                                 i_index );
  437.         if( p_b[ i_index ] == NULL )
  438.         {
  439.             msg_Err( p_vout, "double buffering is not possible" );
  440.             ggiClose( p_vout->p_sys->p_display );
  441.             ggiExit();
  442.             return( 1 );
  443.         }
  445.         /* Check buffer properties */
  446.         if( ! ( p_b[ i_index ]->type & GGI_DB_SIMPLE_PLB )
  447.            || ( p_b[ i_index ]->page_size != 0 )
  448.            || ( p_b[ i_index ]->write == NULL )
  449.            || ( p_b[ i_index ]->noaccess != 0 )
  450.            || ( p_b[ i_index ]->align != 0 ) )
  451.         {
  452.             msg_Err( p_vout, "incorrect video memory type" );
  453.             ggiClose( p_vout->p_sys->p_display );
  454.             ggiExit();
  455.             return( 1 );
  456.         }
  458.         /* Check if buffer needs to be acquired before write */
  459.         if( ggiResourceMustAcquire( p_b[ i_index ]->resource ) )
  460.         {
  461.             p_vout->p_sys->b_must_acquire = 1;
  462.         }
  463.     }
  465.     /* Set graphic context colors */
  466.     col_fg.r = col_fg.g = col_fg.b = -1;
  467.     col_bg.r = col_bg.g = col_bg.b = 0;
  468.     if( ggiSetGCForeground(p_vout->p_sys->p_display,
  469.                            ggiMapColor(p_vout->p_sys->p_display,&col_fg)) ||
  470.         ggiSetGCBackground(p_vout->p_sys->p_display,
  471.                            ggiMapColor(p_vout->p_sys->p_display,&col_bg)) )
  472.     {
  473.         msg_Err( p_vout, "cannot set colors" );
  474.         ggiClose( p_vout->p_sys->p_display );
  475.         ggiExit();
  476.         return( 1 );
  477.     }
  479.     /* Set clipping for text */
  480.     if( ggiSetGCClipping( p_vout->p_sys->p_display, 0, 0,
  481.                           p_vout->p_sys->mode.visible.x,
  482.                           p_vout->p_sys->mode.visible.y ) )
  483.     {
  484.         msg_Err( p_vout, "cannot set clipping" );
  485.         ggiClose( p_vout->p_sys->p_display );
  486.         ggiExit();
  487.         return( 1 );
  488.     }
  490.     /* FIXME: set palette in 8bpp */
  491.     p_vout->p_sys->i_bits_per_pixel = p_b[ 0 ]->buffer.plb.pixelformat->depth;
  493.     return( 0 );
  494. #undef p_b
  495. }
  497. /*****************************************************************************
  498.  * CloseDisplay: close and reset GGI device
  499.  *****************************************************************************
  500.  * This function returns all resources allocated by OpenDisplay and restore
  501.  * the original state of the device.
  502.  *****************************************************************************/
  503. static void CloseDisplay( vout_thread_t *p_vout )
  504. {
  505.     /* Restore original mode and close display */
  506.     ggiClose( p_vout->p_sys->p_display );
  508.     /* Exit library */
  509.     ggiExit();
  510. }
  512. /*****************************************************************************
  513.  * SetPalette: sets an 8 bpp palette
  514.  *****************************************************************************/
  515. static void SetPalette( vout_thread_t *p_vout,
  516.                         uint16_t *red, uint16_t *green, uint16_t *blue )
  517. {
  518.     ggi_color colors[256];
  519.     int i;
  521.     /* Fill colors with color information */
  522.     for( i = 0; i < 256; i++ )
  523.     {
  524.         colors[ i ].r = red[ i ];
  525.         colors[ i ].g = green[ i ];
  526.         colors[ i ].b = blue[ i ];
  527.         colors[ i ].a = 0;
  528.     }
  530.     /* Set palette */
  531.     if( ggiSetPalette( p_vout->p_sys->p_display, 0, 256, colors ) < 0 )
  532.     {
  533.         msg_Err( p_vout, "failed setting palette" );
  534.     }
  535. }