vout_beos.cpp 18 KB
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/*****************************************************************************
 * vout_beos.cpp: beos video output display method
 *****************************************************************************
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 * Copyright (C) 2000, 2001 VideoLAN
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 * $Id: vout_beos.cpp,v 1.36 2001/12/30 07:09:54 sam Exp $
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 *
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 * Authors: Jean-Marc Dressler <polux@via.ecp.fr>
 *          Samuel Hocevar <sam@zoy.org>
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 *          Tony Castley <tcastley@mail.powerup.com.au>
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 *          Richard Shepherd <richard@rshepherd.demon.co.uk>
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 *
 * 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 <stdlib.h>                                                /* free() */
#include <stdio.h>
#include <string.h>                                            /* strerror() */
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#include <InterfaceKit.h>
#include <DirectWindow.h>
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#include <Application.h>
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#include <Bitmap.h>
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extern "C"
{
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#include <videolan/vlc.h>
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#include "video.h"
#include "video_output.h"

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#include "interface.h"
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}

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#include "VideoWindow.h"
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#define BITS_PER_PLANE  32
#define BYTES_PER_PIXEL 4
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/*****************************************************************************
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 * vout_sys_t: BeOS video output method descriptor
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 *****************************************************************************
 * This structure is part of the video output thread descriptor.
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 * It describes the BeOS specific properties of an output thread.
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 *****************************************************************************/
typedef struct vout_sys_s
{
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    VideoWindow *      p_window;
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    byte_t *              pp_buffer[2];
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    s32                   i_width;
    s32                   i_height;
} vout_sys_t;


/*****************************************************************************
 * beos_GetAppWindow : retrieve a BWindow pointer from the window name
 *****************************************************************************/
BWindow *beos_GetAppWindow(char *name)
{
    int32       index;
    BWindow     *window;
    
    for (index = 0 ; ; index++)
    {
        window = be_app->WindowAt(index);
        if (window == NULL)
            break;
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        if (window->LockWithTimeout(20000) == B_OK)
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        {
            if (strcmp(window->Name(), name) == 0)
            {
                window->Unlock();
                break;
            }
            window->Unlock();
        }
    }
    return window; 
}

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/**************************************************************************** 
* 
 * DrawingThread : thread that really does the drawing 
 **************************************************************************** 
*/ 
int32 Draw(void *data) 
{ 
    //rudolf: sync init: 
    BScreen *screen; 
    display_mode disp_mode; 
    static uint32 refresh, oldrefresh = 0; 

    screen = new BScreen(); 
    screen-> GetMode(&disp_mode); 
    refresh = 
         (disp_mode.timing.pixel_clock * 1000)/((disp_mode.timing.h_total)* 
         (disp_mode.timing.v_total)); 
    if (!(refresh == oldrefresh)) 
    { 
        printf("\nNew refreshrate is %d:Hz\n",refresh); 
        oldrefresh = refresh; 
        if (refresh  < 61) 
        { 
            printf("Enabling retrace sync.\n"); 
        } 
        else 
        { 
            printf("Disabling retrace sync.\n"); 
        } 
    } 

    VideoWindow* p_win; 
    p_win = (VideoWindow *) data; 
    if ( p_win-> voutWindow-> LockLooper() ) 
    { 
        //rudolf: sync: 
        if (refresh  < 61) 
        { 
            screen-> WaitForRetrace(22000);//set timeout for  < 45 Hz... 
        } 

        p_win-> view-> DrawBitmap( p_win-> bitmap[p_win-> i_buffer], 
                                 p_win-> bitmap[p_win-> i_buffer]-> Bounds(), 
                                 p_win-> voutWindow-> Bounds() );  
        p_win-> voutWindow-> UnlockLooper(); 
    } 
    return B_OK; 
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}

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/*****************************************************************************
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 * bitmapWindow : This is the bitmap window output
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 *****************************************************************************/
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bitmapWindow::bitmapWindow(BRect frame, VideoWindow *theOwner)
        : BWindow( frame, NULL, B_TITLED_WINDOW, 
                   B_OUTLINE_RESIZE | B_NOT_CLOSABLE | B_NOT_MINIMIZABLE )
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{
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    is_zoomed = false;
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    origRect = frame;
    owner = theOwner;
    SetTitle(VOUT_TITLE " (BBitmap output)");
}
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bitmapWindow::~bitmapWindow()
{
}
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void bitmapWindow::FrameResized( float width, float height )
{
	if (is_zoomed)
	{
	    return;
	}
	float width_scale;
	float height_scale;
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	width_scale = width / origRect.Width();
	height_scale = height / origRect.Height();
	
    /* if the width is proportionally smaller */
    if (width_scale <= height_scale)
    {
        ResizeTo(width, origRect.Height() * width_scale);
    }
    else /* if the height is proportionally smaller */
    {
        ResizeTo(origRect.Width() * height_scale, height);
    }
}
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void bitmapWindow::Zoom(BPoint origin, float width, float height )
{
	if(is_zoomed)
	{
		MoveTo(origRect.left, origRect.top);
		ResizeTo(origRect.IntegerWidth(), origRect.IntegerHeight());
		be_app->ShowCursor();
	}
	else
	{
		BScreen *screen;
		screen = new BScreen(this);
		BRect rect = screen->Frame();
		delete screen;
		MoveTo(0,0);
		ResizeTo(rect.IntegerWidth(), rect.IntegerHeight());
		be_app->HideCursor();
	}
	is_zoomed = !is_zoomed;
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}

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/*****************************************************************************
 * directWindow : This is the bitmap window output
 *****************************************************************************/
directWindow::directWindow(BRect frame, VideoWindow *theOwner)
        : BDirectWindow( frame, NULL, B_TITLED_WINDOW, 
                   B_OUTLINE_RESIZE | B_NOT_CLOSABLE | B_NOT_MINIMIZABLE )
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{
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    is_zoomed = false;
    origRect = frame;
    owner = theOwner;
    SetTitle(VOUT_TITLE " (DirectWindow output)");
}
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directWindow::~directWindow()
{
}
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void directWindow::DirectConnected(direct_buffer_info *info)
{
}
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void directWindow::FrameResized( float width, float height )
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{
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	if (is_zoomed)
	{
	    return;
	}
	float width_scale;
	float height_scale;

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	width_scale = width / origRect.Width();
	height_scale = height / origRect.Height();
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    /* if the width is proportionally smaller */
    if (width_scale <= height_scale)
    {
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        ResizeTo(width, origRect.Height() * width_scale);
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    }
    else /* if the height is proportionally smaller */
    {
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        ResizeTo(origRect.Width() * height_scale, height);
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    }
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}

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void directWindow::Zoom(BPoint origin, float width, float height )
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{
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	if(is_zoomed)
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	{
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	    SetFullScreen(false);
		MoveTo(origRect.left, origRect.top);
		ResizeTo(origRect.IntegerWidth(), origRect.IntegerHeight());
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		be_app->ShowCursor();
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	}
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	else
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	{
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		SetFullScreen(true);
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		BScreen *screen;
		screen = new BScreen(this);
		BRect rect = screen->Frame();
		delete screen;
		MoveTo(0,0);
		ResizeTo(rect.IntegerWidth(), rect.IntegerHeight());
		be_app->HideCursor();
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	}
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	is_zoomed = !is_zoomed;
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}

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/*****************************************************************************
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 * VideoWindow constructor and destructor
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 *****************************************************************************/
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VideoWindow::VideoWindow( int width, int height, 
                          vout_thread_t *p_video_output )
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{
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    if ( BDirectWindow::SupportsWindowMode() )
    { 
        voutWindow = new directWindow( BRect( 80, 50, 
	                                      80 + width, 50 + height ), this );
    }
    else
    {
	    voutWindow = new bitmapWindow( BRect( 80, 50, 
	                                      80 + width, 50 + height ), this );
	}

	/* set the VideoWindow variables */
    teardownwindow = false;
	
	/* create the view to do the display */
    view = new VLCView( voutWindow->Bounds() );
    voutWindow->AddChild(view);
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    /* Bitmap mode overlay not available */
	bitmap[0] = new BBitmap( voutWindow->Bounds(), B_RGB32);
	bitmap[1] = new BBitmap( voutWindow->Bounds(), B_RGB32);
	memset(bitmap[0]->Bits(), 0, bitmap[0]->BitsLength());
 	memset(bitmap[1]->Bits(), 0, bitmap[1]->BitsLength());

	i_width = bitmap[0]->Bounds().IntegerWidth();
	i_height = bitmap[0]->Bounds().IntegerHeight();

    voutWindow->Show();
}

VideoWindow::~VideoWindow()
{
    int32 result;

    voutWindow->Hide();
    voutWindow->Sync();
    voutWindow->Lock();
    voutWindow->Quit();
    teardownwindow = true;
    wait_for_thread(fDrawThreadID, &result);
   	delete bitmap[0];
   	delete bitmap[1];
}

void VideoWindow::resizeIfRequired( int newWidth, int newHeight )
{
    if (( newWidth != i_width + 1) &&
        ( newHeight != i_height + 1) &&
        ( newWidth != 0 ))
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    {
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        if ( voutWindow->Lock() )
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        {
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            view->ClearViewBitmap();
            i_width = newWidth - 1;
            i_height = newHeight -1;
            voutWindow->ResizeTo((float) i_width, (float) i_height); 
            voutWindow->Unlock();
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        }
    }
}

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void VideoWindow::drawBuffer(int bufferIndex)
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{
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	status_t status;
	
	i_buffer = bufferIndex; 
	
    fDrawThreadID = spawn_thread(Draw, "drawing_thread",
                    B_DISPLAY_PRIORITY, (void*) this);
    wait_for_thread(fDrawThreadID, &status);
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}

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/*****************************************************************************
 * VLCView::VLCView
 *****************************************************************************/
VLCView::VLCView(BRect bounds) : BView(bounds, "", B_FOLLOW_ALL, B_WILL_DRAW)
{
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	SetViewColor(B_TRANSPARENT_32_BIT);
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}

/*****************************************************************************
 * VLCView::~VLCView
 *****************************************************************************/
VLCView::~VLCView()
{
}

/*****************************************************************************
 * VLCVIew::~VLCView
 *****************************************************************************/
void VLCView::MouseDown(BPoint point)
{
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	BWindow *win = Window();
	win->Zoom();
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}

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extern "C"
{

/*****************************************************************************
 * Local prototypes
 *****************************************************************************/
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static int  vout_Probe      ( probedata_t *p_data );
static int  vout_Create     ( struct vout_thread_s * );
static int  vout_Init       ( struct vout_thread_s * );
static void vout_End        ( struct vout_thread_s * );
static void vout_Destroy    ( struct vout_thread_s * );
static int  vout_Manage     ( struct vout_thread_s * );
static void vout_Display    ( struct vout_thread_s * );

static int  BeosOpenDisplay ( vout_thread_t *p_vout );
static void BeosCloseDisplay( vout_thread_t *p_vout );

/*****************************************************************************
 * Functions exported as capabilities. They are declared as static so that
 * we don't pollute the namespace too much.
 *****************************************************************************/
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void _M( vout_getfunctions )( function_list_t * p_function_list )
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{
    p_function_list->pf_probe = vout_Probe;
    p_function_list->functions.vout.pf_create     = vout_Create;
    p_function_list->functions.vout.pf_init       = vout_Init;
    p_function_list->functions.vout.pf_end        = vout_End;
    p_function_list->functions.vout.pf_destroy    = vout_Destroy;
    p_function_list->functions.vout.pf_manage     = vout_Manage;
    p_function_list->functions.vout.pf_display    = vout_Display;
    p_function_list->functions.vout.pf_setpalette = NULL;
}

/*****************************************************************************
 * vout_Probe: probe the video driver and return a score
 *****************************************************************************
 * This function tries to initialize SDL and returns a score to the
 * plugin manager so that it can select the best plugin.
 *****************************************************************************/
static int vout_Probe( probedata_t *p_data )
{
    if( TestMethod( VOUT_METHOD_VAR, "beos" ) )
    {
        return( 999 );
    }
    return( 100 );
}
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/*****************************************************************************
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 * vout_Create: allocates BeOS video thread output method
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 *****************************************************************************
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 * This function allocates and initializes a BeOS vout method.
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 *****************************************************************************/
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int vout_Create( vout_thread_t *p_vout )
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{
    /* Allocate structure */
    p_vout->p_sys = (vout_sys_t*) malloc( sizeof( vout_sys_t ) );
    if( p_vout->p_sys == NULL )
    {
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        intf_ErrMsg( "error: %s", strerror(ENOMEM) );
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        return( 1 );
    }
    
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    /* force scaling off */
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	p_vout->b_scale = false;
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    /* Open and initialize device */
    if( BeosOpenDisplay( p_vout ) )
    {
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        intf_ErrMsg("vout error: can't open display");
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        free( p_vout->p_sys );
        return( 1 );
    }

    return( 0 );
}

/*****************************************************************************
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 * vout_Init: initialize BeOS video thread output method
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 *****************************************************************************/
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int vout_Init( vout_thread_t *p_vout )
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{
    VideoWindow * p_win = p_vout->p_sys->p_window;
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    if((p_win->bitmap[0] != NULL) && (p_win->bitmap[1] != NULL))
   	{
    	p_vout->pf_setbuffers( p_vout,
               (byte_t *)p_win->bitmap[0]->Bits(),
               (byte_t *)p_win->bitmap[1]->Bits());
    }
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    return( 0 );
}

/*****************************************************************************
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 * vout_End: terminate BeOS video thread output method
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 *****************************************************************************/
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void vout_End( vout_thread_t *p_vout )
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{
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	/* place code here to end the video */
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}

/*****************************************************************************
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 * vout_Destroy: destroy BeOS video thread output method
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 *****************************************************************************
 * Terminate an output method created by DummyCreateOutputMethod
 *****************************************************************************/
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void vout_Destroy( vout_thread_t *p_vout )
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{
    BeosCloseDisplay( p_vout );
    free( p_vout->p_sys );
}

/*****************************************************************************
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 * vout_Manage: handle BeOS events
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 *****************************************************************************
 * This function should be called regularly by video output thread. It manages
 * console events. It returns a non null value on error.
 *****************************************************************************/
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int vout_Manage( vout_thread_t *p_vout )
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{
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    VideoWindow * p_win = p_vout->p_sys->p_window;
    
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    p_win->resizeIfRequired(p_vout->p_buffer[p_vout->i_buffer_index].i_pic_width,
                            p_vout->p_buffer[p_vout->i_buffer_index].i_pic_height);
                            
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	return( 0 );
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}

/*****************************************************************************
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 * vout_Display: displays previously rendered output
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 *****************************************************************************
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 * This function send the currently rendered image to BeOS image, waits until
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 * it is displayed and switch the two rendering buffers, preparing next frame.
 *****************************************************************************/
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void vout_Display( vout_thread_t *p_vout )
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{
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    VideoWindow * p_win = p_vout->p_sys->p_window;
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    /* draw buffer if required */    
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	if (!p_win->teardownwindow)
	{
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       p_win->drawBuffer(p_vout->i_buffer_index);
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    }
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    /* change buffer */
	p_vout->i_buffer_index = ++p_vout->i_buffer_index & 1;
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}

/* following functions are local */

/*****************************************************************************
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 * BeosOpenDisplay: open and initialize BeOS device
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 *****************************************************************************/
static int BeosOpenDisplay( vout_thread_t *p_vout )
{ 
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    VideoWindow * p_win = new VideoWindow( p_vout->i_width - 1, 
                                           p_vout->i_height - 1, 
                                           p_vout );

    if( p_win == 0 )
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    {
        free( p_vout->p_sys );
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        intf_ErrMsg( "error: cannot allocate memory for VideoWindow" );
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        return( 1 );
    }   
    
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    p_vout->p_sys->p_window = p_win;
    /* set the system to 32bits always
       let BeOS do all the work */
	p_vout->b_YCbr            = false;
    p_vout->i_screen_depth    = BITS_PER_PLANE;
    p_vout->i_bytes_per_pixel = BYTES_PER_PIXEL;
    p_vout->i_width           = p_win->i_width + 1;
    p_vout->i_height          = p_win->i_height + 1;
    p_vout->i_bytes_per_line  = p_vout->i_width * BYTES_PER_PIXEL;
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    p_vout->i_red_mask =        0xff0000;
    p_vout->i_green_mask =      0x00ff00;
    p_vout->i_blue_mask =       0x0000ff;
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    return( 0 );
}

/*****************************************************************************
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 * BeosDisplay: close and reset BeOS device
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 *****************************************************************************
 * Returns all resources allocated by BeosOpenDisplay and restore the original
 * state of the device.
 *****************************************************************************/
static void BeosCloseDisplay( vout_thread_t *p_vout )
{    
    /* Destroy the video window */
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    delete p_vout->p_sys->p_window;
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}

} /* extern "C" */