directx.c

VLC媒体播放程序

/*****************************************************************************
 * vout.c: Windows DirectX video output display method
 *****************************************************************************
 * Copyright (C) 2001-2004 VideoLAN
 * $Id: directx.c,v 1.36 2004/02/26 13:58:23 gbazin Exp $
 *
 * Authors: Gildas Bazin <[e-mail]>
 *
 * 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:
 *
 * This plugin will use YUV overlay if supported, using overlay will result in
 * the best video quality (hardware interpolation when rescaling the picture)
 * and the fastest display as it requires less processing.
 *
 * If YUV overlay is not supported this plugin will use RGB offscreen video
 * surfaces that will be blitted onto the primary surface (display) to
 * effectively display the pictures. This fallback method also enables us to
 * display video in window mode.
 *
 *****************************************************************************/
#include <errno.h>                                                 /* ENOMEM */
#include <stdlib.h>                                                /* free() */
#include <string.h>                                            /* strerror() */

#include <vlc/vlc.h>
#include <vlc/intf.h>
#include <vlc/vout.h>

#include <windows.h>
#include <ddraw.h>

#include <multimon.h>
#undef GetSystemMetrics

#ifndef MONITOR_DEFAULTTONEAREST
#   define MONITOR_DEFAULTTONEAREST 2
#endif

#include "vout.h"

/*****************************************************************************
 * DirectDraw GUIDs.
 * Defining them here allows us to get rid of the dxguid library during
 * the linking stage.
 *****************************************************************************/
#include <initguid.h>
DEFINE_GUID( IID_IDirectDraw2, 0xB3A6F3E0,0x2B43,0x11CF,0xA2,0xDE,0x00,0xAA,0x00,0xB9,0x33,0x56 );
DEFINE_GUID( IID_IDirectDrawSurface2, 0x57805885,0x6eec,0x11cf,0x94,0x41,0xa8,0x23,0x03,0xc1,0x0e,0x27 );

/*****************************************************************************
 * Local prototypes.
 *****************************************************************************/
static int  OpenVideo  ( vlc_object_t * );
static void CloseVideo ( vlc_object_t * );

static int  Init      ( vout_thread_t * );
static void End       ( vout_thread_t * );
static int  Manage    ( vout_thread_t * );
static void Display   ( vout_thread_t *, picture_t * );

static int  NewPictureVec  ( vout_thread_t *, picture_t *, int );
static void FreePictureVec ( vout_thread_t *, picture_t *, int );
static int  UpdatePictureStruct( vout_thread_t *, picture_t *, int );

static int  DirectXInitDDraw      ( vout_thread_t *p_vout );
static void DirectXCloseDDraw     ( vout_thread_t *p_vout );
static int  DirectXCreateDisplay  ( vout_thread_t *p_vout );
static void DirectXCloseDisplay   ( vout_thread_t *p_vout );
static int  DirectXCreateSurface  ( vout_thread_t *p_vout,
                                    LPDIRECTDRAWSURFACE2 *, int, int, int );
static void DirectXCloseSurface   ( vout_thread_t *p_vout,
                                    LPDIRECTDRAWSURFACE2 );
static int  DirectXCreateClipper  ( vout_thread_t *p_vout );
static void DirectXGetDDrawCaps   ( vout_thread_t *p_vout );
static int  DirectXLockSurface    ( vout_thread_t *p_vout, picture_t *p_pic );
static int  DirectXUnlockSurface  ( vout_thread_t *p_vout, picture_t *p_pic );

static DWORD DirectXFindColorkey( vout_thread_t *p_vout, uint32_t i_color );

/* Object variables callbacks */
static int OnTopCallback( vlc_object_t *, char const *,
                          vlc_value_t, vlc_value_t, void * );
static int FindDevicesCallback( vlc_object_t *, char const *,
                                vlc_value_t, vlc_value_t, void * );

/*****************************************************************************
 * Module descriptor
 *****************************************************************************/
#define HW_YUV_TEXT N_("Use hardware YUV->RGB conversions")
#define HW_YUV_LONGTEXT N_( \
    "Try to use hardware acceleration for YUV->RGB conversions. " \
    "This option doesn't have any effect when using overlays." )

#define SYSMEM_TEXT N_("Use video buffers in system memory")
#define SYSMEM_LONGTEXT N_( \
    "Create video buffers in system memory instead of video memory. This " \
    "isn't recommended as usually using video memory allows to benefit from " \
    "more hardware acceleration (like rescaling or YUV->RGB conversions). " \
    "This option doesn't have any effect when using overlays." )

#define TRIPLEBUF_TEXT N_("Use triple buffering for overlays")
#define TRIPLEBUF_LONGTEXT N_( \
    "Try to use triple bufferring when using YUV overlays. That results in " \
    "much better video quality (no flickering)." )

#define DEVICE_TEXT N_("Name of desired display device")
#define DEVICE_LONGTEXT N_("In a multimonitor configuration, you can specify "\
    "the Windows device name of the display that you want the video window " \
    "to open on. For example, \"\\\\.\\DISPLAY1\" or \"\\\\.\\DISPLAY2\"." )

static char *ppsz_dev[] = { "" };
static char *ppsz_dev_text[] = { N_("Default") };

vlc_module_begin();
    add_bool( "directx-hw-yuv", 1, NULL, HW_YUV_TEXT, HW_YUV_LONGTEXT,
              VLC_TRUE );
    add_bool( "directx-use-sysmem", 0, NULL, SYSMEM_TEXT, SYSMEM_LONGTEXT,
              VLC_TRUE );
    add_bool( "directx-3buffering", 1, NULL, TRIPLEBUF_TEXT,
              TRIPLEBUF_LONGTEXT, VLC_TRUE );

    add_string( "directx-device", "", NULL, DEVICE_TEXT, DEVICE_LONGTEXT,
                VLC_TRUE );
        change_string_list( ppsz_dev, ppsz_dev_text, FindDevicesCallback );
        change_action_add( FindDevicesCallback, N_("Refresh list") );

    set_description( _("DirectX video output") );
    set_capability( "video output", 100 );
    add_shortcut( "directx" );
    set_callbacks( OpenVideo, CloseVideo );
vlc_module_end();

#if 0 /* FIXME */
    /* check if we registered a window class because we need to
     * unregister it */
    WNDCLASS wndclass;
    if( GetClassInfo( GetModuleHandle(NULL), "VLC DirectX", &wndclass ) )
        UnregisterClass( "VLC DirectX", GetModuleHandle(NULL) );
#endif

/*****************************************************************************
 * OpenVideo: allocate DirectX video thread output method
 *****************************************************************************
 * This function allocates and initialize the DirectX vout method.
 *****************************************************************************/
static int OpenVideo( vlc_object_t *p_this )
{
    vout_thread_t * p_vout = (vout_thread_t *)p_this;
    vlc_value_t val, text;
    HMODULE huser32;

    /* 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 VLC_ENOMEM;
    }

    /* Initialisations */
    p_vout->pf_init = Init;
    p_vout->pf_end = End;
    p_vout->pf_manage = Manage;
    p_vout->pf_render = NULL;
    p_vout->pf_display = Display;

    p_vout->p_sys->p_ddobject = NULL;
    p_vout->p_sys->p_display = NULL;
    p_vout->p_sys->p_current_surface = NULL;
    p_vout->p_sys->p_clipper = NULL;
    p_vout->p_sys->hwnd = p_vout->p_sys->hvideownd = NULL;
    p_vout->p_sys->hparent = NULL;
    p_vout->p_sys->i_changes = 0;
    SetRectEmpty( &p_vout->p_sys->rect_display  );

    /* Multimonitor stuff */
    p_vout->p_sys->hmonitor = NULL;
    p_vout->p_sys->p_display_driver = NULL;
    p_vout->p_sys->MonitorFromWindow = NULL;
    p_vout->p_sys->GetMonitorInfo = NULL;
    if( (huser32 = GetModuleHandle( "USER32" ) ) )
    {
        p_vout->p_sys->MonitorFromWindow =
            GetProcAddress( huser32, "MonitorFromWindow" );
        p_vout->p_sys->GetMonitorInfo =
            GetProcAddress( huser32, "GetMonitorInfoA" );
    }

    var_Create( p_vout, "overlay", VLC_VAR_BOOL | VLC_VAR_DOINHERIT );
    var_Create( p_vout, "directx-use-sysmem", VLC_VAR_BOOL|VLC_VAR_DOINHERIT );
    var_Create( p_vout, "directx-hw-yuv", VLC_VAR_BOOL | VLC_VAR_DOINHERIT );
    var_Create( p_vout, "directx-3buffering", VLC_VAR_BOOL|VLC_VAR_DOINHERIT );
    var_Create( p_vout, "directx-device", VLC_VAR_STRING | VLC_VAR_DOINHERIT );

    p_vout->p_sys->b_cursor_hidden = 0;
    p_vout->p_sys->i_lastmoved = mdate();

    /* Set main window's size */
    p_vout->p_sys->i_window_width = p_vout->i_window_width;
    p_vout->p_sys->i_window_height = p_vout->i_window_height;

    /* Create the DirectXEventThread, this thread is created by us to isolate
     * the Win32 PeekMessage function calls. We want to do this because
     * Windows can stay blocked inside this call for a long time, and when
     * this happens it thus blocks vlc's video_output thread.
     * DirectXEventThread will take care of the creation of the video
     * window (because PeekMessage has to be called from the same thread which
     * created the window). */
    msg_Dbg( p_vout, "creating DirectXEventThread" );
    p_vout->p_sys->p_event =
        vlc_object_create( p_vout, sizeof(event_thread_t) );
    p_vout->p_sys->p_event->p_vout = p_vout;
    if( vlc_thread_create( p_vout->p_sys->p_event, "DirectX Events Thread",
                           DirectXEventThread, 0, 1 ) )
    {
        msg_Err( p_vout, "cannot create DirectXEventThread" );
        vlc_object_destroy( p_vout->p_sys->p_event );
        p_vout->p_sys->p_event = NULL;
        goto error;
    }

    if( p_vout->p_sys->p_event->b_error )
    {
        msg_Err( p_vout, "DirectXEventThread failed" );
        goto error;
    }

    vlc_object_attach( p_vout->p_sys->p_event, p_vout );

    msg_Dbg( p_vout, "DirectXEventThread running" );

    /* Initialise DirectDraw */
    if( DirectXInitDDraw( p_vout ) )
    {
        msg_Err( p_vout, "cannot initialize DirectDraw" );
        goto error;
    }

    /* Create the directx display */
    if( DirectXCreateDisplay( p_vout ) )
    {
        msg_Err( p_vout, "cannot initialize DirectDraw" );
        goto error;
    }

    /* Add a variable to indicate if the window should be on top of others */
    var_Create( p_vout, "video-on-top", VLC_VAR_BOOL | VLC_VAR_DOINHERIT );
    text.psz_string = _("Always on top");
    var_Change( p_vout, "video-on-top", VLC_VAR_SETTEXT, &text, NULL );
    var_Get( p_vout, "video-on-top", &val );
    p_vout->p_sys->b_on_top_change = val.b_bool;
    var_AddCallback( p_vout, "video-on-top", OnTopCallback, NULL );

    return VLC_SUCCESS;

 error:
    CloseVideo( VLC_OBJECT(p_vout) );
    return VLC_EGENERIC;
}

/*****************************************************************************
 * Init: initialize DirectX video thread output method
 *****************************************************************************
 * This function create the directx surfaces needed by the output thread.
 * It is called at the beginning of the thread.
 *****************************************************************************/
static int Init( vout_thread_t *p_vout )
{
    int i_chroma_backup;
    vlc_value_t val;

    /* Get a few default parameters */
    var_Get( p_vout, "overlay", &val );
    p_vout->p_sys->b_using_overlay = val.b_bool;
    var_Get( p_vout, "directx-use-sysmem", &val );
    p_vout->p_sys->b_use_sysmem = val.b_bool;
    var_Get( p_vout, "directx-hw-yuv", &val );
    p_vout->p_sys->b_hw_yuv = val.b_bool;
    var_Get( p_vout, "directx-3buffering", &val );
    p_vout->p_sys->b_3buf_overlay = val.b_bool;

    /* Initialise DirectDraw if not already done.
     * We do this here because on multi-monitor systems we may have to
     * re-create the directdraw surfaces. */
    if( !p_vout->p_sys->p_ddobject &&
        DirectXInitDDraw( p_vout ) != VLC_SUCCESS )
    {
        msg_Err( p_vout, "cannot initialize DirectDraw" );
        return VLC_EGENERIC;
    }

    /* Create the directx display */
    if( !p_vout->p_sys->p_display &&
        DirectXCreateDisplay( p_vout ) != VLC_SUCCESS )
    {
        msg_Err( p_vout, "cannot initialize DirectDraw" );
        return VLC_EGENERIC;
    }

    /* Initialize the output structure.
     * Since DirectDraw can do rescaling for us, stick to the default
     * coordinates and aspect. */
    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;

#define MAX_DIRECTBUFFERS 1
    /* Right now we use only 1 directbuffer because we don't want the
     * video decoder to decode directly into direct buffers as they are
     * created into video memory and video memory is _really_ slow */

    /* Choose the chroma we will try first. */
    switch( p_vout->render.i_chroma )
    {
        case VLC_FOURCC('Y','U','Y','2'):
        case VLC_FOURCC('Y','U','N','V'):
            p_vout->output.i_chroma = VLC_FOURCC('Y','U','Y','2');
            break;