/***************************************************************************** * mga.c : Matrox Graphic Array plugin for vlc ***************************************************************************** * Copyright (C) 2000, 2001 VideoLAN * $Id: mga.c,v 1.3 2003/10/25 00:49:14 sam Exp $ * * Authors: Aaron Holtzman <aholtzma@ess.engr.uvic.ca> *          Samuel Hocevar <sam@zoy.org> * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111, USA. *****************************************************************************//***************************************************************************** * Preamble *****************************************************************************/#include <errno.h>                                                 /* ENOMEM */#include <unistd.h>                                               /* close() */#include <stdlib.h>                                                /* free() */#include <string.h>                                            /* strerror() */#include <fcntl.h>                                                 /* open() */#include <sys/ioctl.h>                                            /* ioctl() */#include <sys/mman.h>                                          /* PROT_WRITE */#include <vlc/vlc.h>#include <vlc/vout.h>#ifdef SYS_BSD#include <sys/types.h>                                     /* typedef ushort */#endif/***************************************************************************** * Local prototypes *****************************************************************************/static int  Create    ( vlc_object_t * );static void Destroy   ( vlc_object_t * );static int  Init      ( vout_thread_t * );static void End       ( vout_thread_t * );static void Display   ( vout_thread_t *, picture_t * );static int  NewPicture     ( vout_thread_t *, picture_t * );/***************************************************************************** * Module descriptor *****************************************************************************/vlc_module_begin();    set_description( _("Matrox Graphic Array video output") );    set_capability( "video output", 10 );    set_callbacks( Create, Destroy );vlc_module_end();/***************************************************************************** * vout_sys_t: video output MGA method descriptor ***************************************************************************** * This structure is part of the video output thread descriptor. * It describes the MGA specific properties of an output thread. *****************************************************************************/#ifndef __LINUX_MGAVID_H#   define __LINUX_MGAVID_H#   define MGA_VID_CONFIG _IOR('J', 1, mga_vid_config_t)#   define MGA_VID_ON     _IO ('J', 2)#   define MGA_VID_OFF    _IO ('J', 3)#   define MGA_VID_FSEL   _IOR('J', 4, int)#   define MGA_G200 0x1234#   define MGA_G400 0x5678#   define MGA_VID_FORMAT_YV12 0x32315659#   define MGA_VID_FORMAT_IYUV (('I'<<24)|('Y'<<16)|('U'<<8)|'V')#   define MGA_VID_FORMAT_I420 (('I'<<24)|('4'<<16)|('2'<<8)|'0')#   define MGA_VID_FORMAT_YUY2 (('Y'<<24)|('U'<<16)|('Y'<<8)|'2')#   define MGA_VID_FORMAT_UYVY (('U'<<24)|('Y'<<16)|('V'<<8)|'Y')#   define MGA_VID_VERSION     0x0201#   define MGA_NUM_FRAMES      1typedef struct mga_vid_config_t{    uint16_t version;    uint16_t card_type;    uint32_t ram_size;    uint32_t src_width;    uint32_t src_height;    uint32_t dest_width;    uint32_t dest_height;    uint32_t x_org;    uint32_t y_org;    uint8_t  colkey_on;    uint8_t  colkey_red;    uint8_t  colkey_green;    uint8_t  colkey_blue;    uint32_t format;    uint32_t frame_size;    uint32_t num_frames;} mga_vid_config_t;#endifstruct vout_sys_t{    mga_vid_config_t    mga;    int                 i_fd;    byte_t *            p_video;};struct picture_sys_t{    int     i_frame;};#define CEIL32(x) (((x)+31)&~31)/***************************************************************************** * Create: allocates dummy video thread output method ***************************************************************************** * This function allocates and initializes a dummy vout method. *****************************************************************************/static int Create( vlc_object_t *p_this ){    vout_thread_t *p_vout = (vout_thread_t *)p_this;    /* Allocate structure */    p_vout->p_sys = malloc( sizeof( vout_sys_t ) );    if( p_vout->p_sys == NULL )    {        msg_Err( p_vout, "out of memory" );        return( 1 );    }    p_vout->p_sys->i_fd = open( "/dev/mga_vid", O_RDWR );    if( p_vout->p_sys->i_fd == -1 )    {        msg_Err( p_vout, "cannot open MGA driver /dev/mga_vid" );        free( p_vout->p_sys );        return( 1 );    }    p_vout->pf_init = Init;    p_vout->pf_end = End;    p_vout->pf_manage = NULL;    p_vout->pf_render = NULL;    p_vout->pf_display = Display;    return( 0 );}/***************************************************************************** * Init: initialize dummy video thread output method *****************************************************************************/static int Init( vout_thread_t *p_vout ){    int i_index;    picture_t *p_pic;    I_OUTPUTPICTURES = 0;    /* create the MGA output */    p_vout->output.i_width = p_vout->render.i_width;    p_vout->output.i_height = p_vout->render.i_height;    p_vout->output.i_aspect = p_vout->render.i_aspect;    /* Set coordinates and aspect ratio */    p_vout->p_sys->mga.src_width = CEIL32(p_vout->output.i_width);    p_vout->p_sys->mga.src_height = p_vout->output.i_height;    vout_PlacePicture( p_vout, 1024, 768,                       &p_vout->p_sys->mga.x_org, &p_vout->p_sys->mga.y_org,                       &p_vout->p_sys->mga.dest_width,                       &p_vout->p_sys->mga.dest_height );    /* Initialize a video buffer */    p_vout->p_sys->mga.colkey_on = 0;    p_vout->p_sys->mga.num_frames = MGA_NUM_FRAMES;    p_vout->p_sys->mga.frame_size = CEIL32(p_vout->output.i_width)                                     * p_vout->output.i_height * 2;    p_vout->p_sys->mga.version = MGA_VID_VERSION;    /* Assume we only do YMGA for the moment. XXX: mga_vid calls this     * YV12, but it's actually some strange format with packed UV. */    p_vout->output.i_chroma = VLC_FOURCC('Y','M','G','A');    p_vout->p_sys->mga.format = MGA_VID_FORMAT_YV12;    if( ioctl(p_vout->p_sys->i_fd, MGA_VID_CONFIG, &p_vout->p_sys->mga) )    {        msg_Err( p_vout, "MGA config ioctl failed" );        return -1;    }    if( p_vout->p_sys->mga.card_type == MGA_G200 )    {        msg_Dbg( p_vout, "detected MGA G200 (%d MB Ram)",                         p_vout->p_sys->mga.ram_size );    }    else    {        msg_Dbg( p_vout, "detected MGA G400/G450 (%d MB Ram)",                         p_vout->p_sys->mga.ram_size );    }    p_vout->p_sys->p_video = mmap( 0, p_vout->p_sys->mga.frame_size                                       * MGA_NUM_FRAMES,                                   PROT_WRITE, MAP_SHARED,                                   p_vout->p_sys->i_fd, 0 );    /* Try to initialize up to MGA_NUM_FRAMES direct buffers */    while( I_OUTPUTPICTURES < MGA_NUM_FRAMES )    {        p_pic = NULL;        /* Find an empty picture slot */        for( i_index = 0 ; i_index < VOUT_MAX_PICTURES ; i_index++ )        {            if( p_vout->p_picture[ i_index ].i_status == FREE_PICTURE )            {                p_pic = p_vout->p_picture + i_index;                break;            }        }        /* Allocate the picture */        if( p_pic == NULL || NewPicture( p_vout, p_pic ) )        {            break;        }        p_pic->i_status = DESTROYED_PICTURE;        p_pic->i_type   = DIRECT_PICTURE;        PP_OUTPUTPICTURE[ I_OUTPUTPICTURES ] = p_pic;        I_OUTPUTPICTURES++;    }    /* Blank the windows */    for( i_index = 0; i_index < I_OUTPUTPICTURES; i_index++ )    {        memset( p_vout->p_sys->p_video                 + p_vout->p_sys->mga.frame_size * i_index,                0x00, p_vout->p_sys->mga.frame_size / 2 );        memset( p_vout->p_sys->p_video                 + p_vout->p_sys->mga.frame_size * ( 2*i_index + 1 ) / 2,                0x80, p_vout->p_sys->mga.frame_size / 2 );    }    /* Display the image */    ioctl( p_vout->p_sys->i_fd, MGA_VID_ON, 0 );    return( 0 );}/***************************************************************************** * End: terminate dummy video thread output method *****************************************************************************/static void End( vout_thread_t *p_vout ){    int i_index;    ioctl( p_vout->p_sys->i_fd, MGA_VID_OFF, 0 );    /* Free the output buffers we allocated */    for( i_index = I_OUTPUTPICTURES ; i_index ; )    {        i_index--;    }}/***************************************************************************** * Destroy: destroy dummy video thread output method ***************************************************************************** * Terminate an output method created by DummyCreateOutputMethod *****************************************************************************/static void Destroy( vlc_object_t *p_this ){    vout_thread_t *p_vout = (vout_thread_t *)p_this;    close( p_vout->p_sys->i_fd );    free( p_vout->p_sys );}/***************************************************************************** * Display: displays previously rendered output *****************************************************************************/static void Display( vout_thread_t *p_vout, picture_t *p_pic ){    ioctl( p_vout->p_sys->i_fd, MGA_VID_FSEL, &p_pic->p_sys->i_frame );}/* Following functions are local *//***************************************************************************** * NewPicture: allocate a picture ***************************************************************************** * Returns 0 on success, -1 otherwise *****************************************************************************/static int NewPicture( vout_thread_t *p_vout, picture_t *p_pic ){    /* We know the chroma, allocate a buffer which will be used     * directly by the decoder */    p_pic->p_data = p_vout->p_sys->p_video + I_OUTPUTPICTURES                                              * p_vout->p_sys->mga.frame_size;    p_pic->p_sys = malloc( sizeof( picture_sys_t ) );    if( p_pic->p_sys == NULL )    {        return -1;    }    p_pic->Y_PIXELS = p_pic->p_data;    p_pic->p[Y_PLANE].i_lines = p_vout->output.i_height;    p_pic->p[Y_PLANE].i_pitch = CEIL32( p_vout->output.i_width );    p_pic->p[Y_PLANE].i_pixel_pitch = 1;    p_pic->p[Y_PLANE].i_visible_pitch = p_vout->output.i_width;    p_pic->U_PIXELS = p_pic->p_data + p_vout->p_sys->mga.frame_size * 2/4;    p_pic->p[U_PLANE].i_lines = p_vout->output.i_height / 2;    p_pic->p[U_PLANE].i_pitch = CEIL32( p_vout->output.i_width ) / 2;    p_pic->p[U_PLANE].i_pixel_pitch = 1;    p_pic->p[U_PLANE].i_visible_pitch = p_pic->p[U_PLANE].i_pitch;    p_pic->V_PIXELS = p_pic->p_data + p_vout->p_sys->mga.frame_size * 3/4;    p_pic->p[V_PLANE].i_lines = p_vout->output.i_height / 2;    p_pic->p[V_PLANE].i_pitch = CEIL32( p_vout->output.i_width ) / 2;    p_pic->p[V_PLANE].i_pixel_pitch = 1;    p_pic->p[V_PLANE].i_visible_pitch = p_pic->p[V_PLANE].i_pitch;    p_pic->p_sys->i_frame = I_OUTPUTPICTURES;    p_pic->i_planes = 3;    return 0;}