sdl_epocvideo.cpp

MPEG-4编解码的实现(包括MPEG4视音频编解码)

/*
    SDL - Simple DirectMedia Layer
    Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002  Sam Lantinga

    This library is free software; you can redistribute it and/or
    modify it under the terms of the GNU Library General Public
    License as published by the Free Software Foundation; either
    version 2 of the License, or (at your option) any later version.

    This library 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
    Library General Public License for more details.

    You should have received a copy of the GNU Library General Public
    License along with this library; if not, write to the Free
    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

    Sam Lantinga
    [e-mail]
*/

/*
    SDL_epocvideo.cpp
    Epoc based SDL video driver implementation

    Epoc version by Hannu Viitala ([e-mail])
*/



#include <stdlib.h>
#include <stdio.h>
#include <string.h>

extern "C" {
#include "SDL_error.h"
#include "SDL_timer.h"
#include "SDL_video.h"
#undef NULL
#include "SDL_pixels_c.h"
};

#include "SDL_epocvideo.h"
#include "SDL_epocevents_c.h"

#include <hal.h>
#include <coedef.h>

/* For debugging */

void RDebug_Print_b(char* error_str, void* param)
    {
    TBuf8<128> error8((TUint8*)error_str);
    TBuf<128> error;
    error.Copy(error8);
    if (param) //!! Do not work if the parameter is really 0!!
        RDebug::Print(error, param);
    else 
        RDebug::Print(error);
    }

extern "C" void RDebug_Print(char* error_str, void* param)
    {
    RDebug_Print_b(error_str, param);
    }


int Debug_AvailMem2()
    {
    //User::CompressAllHeaps();
    TMemoryInfoV1Buf membuf; 
    User::LeaveIfError(UserHal::MemoryInfo(membuf));
    TMemoryInfoV1 minfo = membuf();
	return(minfo.iFreeRamInBytes);
    }

extern "C" int Debug_AvailMem()
    {
    return(Debug_AvailMem2());
    }


extern "C" {

/* Initialization/Query functions */

static int EPOC_VideoInit(_THIS, SDL_PixelFormat *vformat);
static SDL_Rect **EPOC_ListModes(_THIS, SDL_PixelFormat *format, Uint32 flags);
static SDL_Surface *EPOC_SetVideoMode(_THIS, SDL_Surface *current, int width, int height, int bpp, Uint32 flags);
static int EPOC_SetColors(_THIS, int firstcolor, int ncolors,
			  SDL_Color *colors);
static void EPOC_VideoQuit(_THIS);

/* Hardware surface functions */

static int EPOC_AllocHWSurface(_THIS, SDL_Surface *surface);
static int EPOC_LockHWSurface(_THIS, SDL_Surface *surface);
static int EPOC_FlipHWSurface(_THIS, SDL_Surface *surface);
static void EPOC_UnlockHWSurface(_THIS, SDL_Surface *surface);
static void EPOC_FreeHWSurface(_THIS, SDL_Surface *surface);
static void EPOC_DirectUpdate(_THIS, int numrects, SDL_Rect *rects);

static int EPOC_Available(void);
static SDL_VideoDevice *EPOC_CreateDevice(int devindex);

/* Mouse functions */

static WMcursor *EPOC_CreateWMCursor(_THIS, Uint8 *data, Uint8 *mask, int w, int h, int hot_x, int hot_y);
static void EPOC_FreeWMCursor(_THIS, WMcursor *cursor);
static int EPOC_ShowWMCursor(_THIS, WMcursor *cursor);



/* !! Table for fast conversion from 8 bit to 12 bit */
static TUint16 EPOC_HWPalette_256_to_4k[256];

VideoBootStrap EPOC_bootstrap = {
	"epoc", "EPOC system",
    EPOC_Available, EPOC_CreateDevice
};

const TUint32 WindowClientHandle = 9210; //!!

/* Epoc video driver bootstrap functions */

static int EPOC_Available(void)
{
    return 1; /* Always available */
}

static void EPOC_DeleteDevice(SDL_VideoDevice *device)
{
	free(device->hidden);
	free(device);
}

static SDL_VideoDevice *EPOC_CreateDevice(int devindex)
{
	SDL_VideoDevice *device;

	/* Allocate all variables that we free on delete */
	device = (SDL_VideoDevice *)malloc(sizeof(SDL_VideoDevice));
	if ( device ) {
		memset(device, 0, (sizeof *device));
		device->hidden = (struct SDL_PrivateVideoData *)
				malloc((sizeof *device->hidden));
	}
	if ( (device == NULL) || (device->hidden == NULL) ) {
		SDL_OutOfMemory();
		if ( device ) {
			free(device);
		}
		return(0);
	}
	memset(device->hidden, 0, (sizeof *device->hidden));

	/* Set the function pointers */
	device->VideoInit = EPOC_VideoInit;
	device->ListModes = EPOC_ListModes;
	device->SetVideoMode = EPOC_SetVideoMode;
	device->SetColors = EPOC_SetColors;
	device->UpdateRects = NULL;
	device->VideoQuit = EPOC_VideoQuit;
	device->AllocHWSurface = EPOC_AllocHWSurface;
	device->CheckHWBlit = NULL;
	device->FillHWRect = NULL;
	device->SetHWColorKey = NULL;
	device->SetHWAlpha = NULL;
	device->LockHWSurface = EPOC_LockHWSurface;
	device->UnlockHWSurface = EPOC_UnlockHWSurface;
	device->FlipHWSurface = EPOC_FlipHWSurface;
	device->FreeHWSurface = EPOC_FreeHWSurface;
	device->SetIcon = NULL;
	device->SetCaption = NULL;
	device->GetWMInfo = NULL;
	device->FreeWMCursor = EPOC_FreeWMCursor;
	device->CreateWMCursor = EPOC_CreateWMCursor;
	device->ShowWMCursor = EPOC_ShowWMCursor;
	device->WarpWMCursor = NULL;
	device->InitOSKeymap = EPOC_InitOSKeymap;
	device->PumpEvents = EPOC_PumpEvents;
	device->free = EPOC_DeleteDevice;

	return device;
}


int GetBpp(TDisplayMode displaymode)
{
    TInt numColors = TDisplayModeUtils::NumDisplayModeColors(displaymode);
    TInt bitsPerPixel = 1;
    for (TInt32 i = 2; i < numColors; i <<= 1, bitsPerPixel++);
    return bitsPerPixel;    
}

void ConstructWindowL(_THIS)
{
	TInt	error;

	error = Private->EPOC_WsSession.Connect();
	User::LeaveIfError(error);
	Private->EPOC_WsScreen=new(ELeave) CWsScreenDevice(Private->EPOC_WsSession);
	User::LeaveIfError(Private->EPOC_WsScreen->Construct());
	User::LeaveIfError(Private->EPOC_WsScreen->CreateContext(Private->EPOC_WindowGc));

	Private->EPOC_WsWindowGroup=RWindowGroup(Private->EPOC_WsSession);
	User::LeaveIfError(Private->EPOC_WsWindowGroup.Construct(WindowClientHandle));
	Private->EPOC_WsWindowGroup.SetOrdinalPosition(0);

    //!!
    TBuf<32> winGroupName;
    winGroupName.Append(0);
    winGroupName.Append(0);
    winGroupName.Append(0);// uid
    winGroupName.Append(0);
    winGroupName.Append(_L("SDL")); // caption
    winGroupName.Append(0);
    winGroupName.Append(0); //doc name
	Private->EPOC_WsWindowGroup.SetName(winGroupName); //!!

	Private->EPOC_WsWindow=RWindow(Private->EPOC_WsSession);
	User::LeaveIfError(Private->EPOC_WsWindow.Construct(Private->EPOC_WsWindowGroup,WindowClientHandle));
	Private->EPOC_WsWindow.SetBackgroundColor(KRgbWhite);
    Private->EPOC_WsWindow.Activate();
	Private->EPOC_WsWindow.SetSize(Private->EPOC_WsScreen->SizeInPixels()); 
	Private->EPOC_WsWindow.SetVisible(ETrue);

    Private->EPOC_WsWindowGroupID = Private->EPOC_WsWindowGroup.Identifier();
    Private->EPOC_IsWindowFocused = EFalse;
}


int EPOC_VideoInit(_THIS, SDL_PixelFormat *vformat)
{
    // !!TODO:handle leave functions!

    int i;

	/* Initialize all variables that we clean on shutdown */   

	for ( i=0; i<SDL_NUMMODES; ++i ) {
		Private->SDL_modelist[i] = (SDL_Rect *)malloc(sizeof(SDL_Rect));
		Private->SDL_modelist[i]->x = Private->SDL_modelist[i]->y = 0;
	}
	/* Modes sorted largest to smallest !!TODO:sorting order??*/
	Private->SDL_modelist[0]->w = 640; Private->SDL_modelist[0]->h = 200; 
	Private->SDL_modelist[1]->w = 320; Private->SDL_modelist[1]->h = 200;
	Private->SDL_modelist[2]->w = 640; Private->SDL_modelist[2]->h = 400; 
	Private->SDL_modelist[3]->w = 640; Private->SDL_modelist[3]->h = 480;
	Private->SDL_modelist[4] = NULL;

    /* Construct Epoc window */

    ConstructWindowL(_this);

    /* Initialise Epoc frame buffer */

    TDisplayMode displayMode = Private->EPOC_WsScreen->DisplayMode();

    #ifndef __WINS__

    TScreenInfoV01 screenInfo;
	TPckg<TScreenInfoV01> sInfo(screenInfo);
	UserSvr::ScreenInfo(sInfo);

	Private->EPOC_ScreenSize		= screenInfo.iScreenSize; 
	Private->EPOC_DisplayMode		= displayMode;
    Private->EPOC_HasFrameBuffer	= screenInfo.iScreenAddressValid;
	Private->EPOC_FrameBuffer		= Private->EPOC_HasFrameBuffer ? (TUint8*) screenInfo.iScreenAddress : NULL;
	Private->EPOC_BytesPerPixel	    = ((GetBpp(displayMode)-1) / 8) + 1;
	Private->EPOC_BytesPerScanLine	= screenInfo.iScreenSize.iWidth * Private->EPOC_BytesPerPixel;

    /* It seems that in SA1100 machines for 8bpp displays there is a 512 palette table at the 
     * beginning of the frame buffer. E.g. Series 7 and Netbook.
     * In 12 bpp machines the table has 16 entries.
	 */
	if (Private->EPOC_HasFrameBuffer && GetBpp(displayMode) == 8)
		Private->EPOC_FrameBuffer += 512;
	if (Private->EPOC_HasFrameBuffer && GetBpp(displayMode) == 12)
		Private->EPOC_FrameBuffer += 16 * 2;

    #else /* defined __WINS__ */
    
    /* Create bitmap, device and context for screen drawing */
    Private->EPOC_ScreenSize        = Private->EPOC_WsScreen->SizeInPixels();

	Private->EPOC_Bitmap = new (ELeave) CWsBitmap(Private->EPOC_WsSession);
	Private->EPOC_Bitmap->Create(Private->EPOC_ScreenSize, displayMode);

	Private->EPOC_DisplayMode	    = displayMode;
    Private->EPOC_HasFrameBuffer    = ETrue;
    Private->EPOC_FrameBuffer       = NULL; /* Private->EPOC_Bitmap->DataAddress() can change any time */
	Private->EPOC_BytesPerPixel	    = ((GetBpp(displayMode)-1) / 8) + 1;
	Private->EPOC_BytesPerScanLine  = Private->EPOC_WsScreen->SizeInPixels().iWidth * Private->EPOC_BytesPerPixel;

    #endif /* __WINS__ */

    /* The "best" video format should be returned to caller. */

    vformat->BitsPerPixel       = /*!!GetBpp(displayMode) */ 8;
    vformat->BytesPerPixel      = /*!!Private->EPOC_BytesPerPixel*/ 1;

    /* Activate events for me */

	Private->EPOC_WsEventStatus = KRequestPending;
	Private->EPOC_WsSession.EventReady(&Private->EPOC_WsEventStatus);
	Private->EPOC_RedrawEventStatus = KRequestPending;
	Private->EPOC_WsSession.RedrawReady(&Private->EPOC_RedrawEventStatus);
    Private->EPOC_WsWindow.PointerFilter(EPointerFilterDrag, 0); 

    Private->EPOC_ScreenOffset = 0;

    //!! TODO: error handling
    //if (ret != KErrNone)
    //    return(-1);
    //else
	    return(0);
}


SDL_Rect **EPOC_ListModes(_THIS, SDL_PixelFormat *format, Uint32 flags)
{
    if (format->BitsPerPixel == 12 || format->BitsPerPixel == 8)
        return Private->SDL_modelist;
    return NULL;
}

int EPOC_SetColors(_THIS, int firstcolor, int ncolors, SDL_Color *colors)
{
    for(int i = firstcolor; i < ncolors; i++) {
	    // 4k value: 000rgb
	    TUint16 color4K = 0;
        color4K |= (colors[i].r & 0x0000f0) << 4; 
	    color4K |= (colors[i].g & 0x0000f0);      
	    color4K |= (colors[i].b & 0x0000f0) >> 4;
        EPOC_HWPalette_256_to_4k[i] = color4K;
    }
	return(0);
}


SDL_Surface *EPOC_SetVideoMode(_THIS, SDL_Surface *current,
				int width, int height, int bpp, Uint32 flags)
{
    /* Check parameters */
    if (!((width == 640 && height == 200 && bpp == 12) ||
          (width == 640 && height == 400 && bpp == 12) || 
          (width == 640 && height == 480 && bpp == 12) || 
          (width == 320 && height == 200 && bpp == 12) || 
          (width == 640 && height == 200 && bpp == 8) ||