sdl_cgxvideo.c

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  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]
*/

#ifdef SAVE_RCSID
static char rcsid =
 "@(#) $Id: SDL_cgxvideo.c,v 1.4 2002/04/22 21:38:04 wmay Exp $";
#endif

/*
 * CGX based SDL video driver implementation by Gabriele Greco
 * [e-mail]
 */

/*
#include <stdlib.h>
#include <stdio.h>
#include <unistd.h>
#include <string.h>
#include <sys/ioctl.h>
#ifdef MTRR_SUPPORT
#include <asm/mtrr.h>
#include <sys/fcntl.h>
#endif
*/

#include "SDL.h"
#include "SDL_error.h"
#include "SDL_timer.h"
#include "SDL_thread.h"
#include "SDL_video.h"
#include "SDL_mouse.h"
#include "SDL_endian.h"
#include "SDL_sysvideo.h"
#include "SDL_pixels_c.h"
#include "SDL_events_c.h"
#include "SDL_cgxgl_c.h"
#include "SDL_cgxvideo.h"
#include "SDL_cgxwm_c.h"
#include "SDL_amigamouse_c.h"
#include "SDL_amigaevents_c.h"
#include "SDL_cgxmodes_c.h"
#include "SDL_cgximage_c.h"
#include "SDL_cgxyuv_c.h"

/* Initialization/Query functions */
static int CGX_VideoInit(_THIS, SDL_PixelFormat *vformat);
static SDL_Surface *CGX_SetVideoMode(_THIS, SDL_Surface *current, int width, int height, int bpp, Uint32 flags);
static int CGX_ToggleFullScreen(_THIS, int on);
static void CGX_UpdateMouse(_THIS);
static int CGX_SetColors(_THIS, int firstcolor, int ncolors, SDL_Color *colors);
static void CGX_VideoQuit(_THIS);

/* CGX driver bootstrap functions */

struct Library *CyberGfxBase=NULL;
struct IntuitionBase *IntuitionBase=NULL;
struct GfxBase *GfxBase=NULL;

int CGX_SetGamma(_THIS, float red, float green, float blue)
{
    SDL_SetError("Gamma correction not supported");
    return -1;
}

int CGX_GetGamma(_THIS, float red, float green, float blue)
{
    SDL_SetError("Gamma correction not supported");
    return -1;
}

int CGX_SetGammaRamp(_THIS, Uint16 *ramp)
{
#if 0
	Int i, ncolors;
	XColor xcmap[256];

	/* See if actually setting the gamma is supported */
	if ( SDL_Visual->class != DirectColor ) {
	    SDL_SetError("Gamma correction not supported on this visual");
	    return(-1);
	}

	/* Calculate the appropriate palette for the given gamma ramp */
	ncolors = SDL_Visual->map_entries;
	for ( i=0; i<ncolors; ++i ) {
		Uint8 c = (256 * i / ncolors);
		xcmap[i].pixel = SDL_MapRGB(this->screen->format, c, c, c);
		xcmap[i].red   = ramp[0*256+c];
		xcmap[i].green = ramp[1*256+c];
		xcmap[i].blue  = ramp[2*256+c];
		xcmap[i].flags = (DoRed|DoGreen|DoBlue);
	}
	XStoreColors(GFX_Display, SDL_XColorMap, xcmap, ncolors);
	XSync(GFX_Display, False);

	return(0);

#else
    SDL_SetError("Gamma correction not supported on this visual");
    return(-1);

#endif
}

static void DestroyScreen(_THIS)
{
  	if(currently_fullscreen)
	{
		if(this->hidden->dbuffer)
		{
			extern struct MsgPort *safeport,*dispport;

			this->hidden->dbuffer=0;

			if(safeport)
			{
				while(GetMsg(safeport)!=NULL);
				DeleteMsgPort(safeport);
			}
			if(dispport)
			{
				while(GetMsg(dispport)!=NULL);
				DeleteMsgPort(dispport);
			}

			this->hidden->SB[0]->sb_DBufInfo->dbi_SafeMessage.mn_ReplyPort=this->hidden->SB[0]->sb_DBufInfo->dbi_DispMessage.mn_ReplyPort=NULL;
			this->hidden->SB[1]->sb_DBufInfo->dbi_SafeMessage.mn_ReplyPort=this->hidden->SB[1]->sb_DBufInfo->dbi_DispMessage.mn_ReplyPort=NULL;

			if(this->hidden->SB[1])
				FreeScreenBuffer(SDL_Display,this->hidden->SB[1]);
			if(this->hidden->SB[0])
				FreeScreenBuffer(SDL_Display,this->hidden->SB[0]);


			this->hidden->SB[0]=this->hidden->SB[1]=NULL;

			if(SDL_RastPort && SDL_RastPort != &SDL_Display->RastPort)
				free(SDL_RastPort);

			SDL_RastPort=NULL;
		}
		CloseScreen(GFX_Display);
		currently_fullscreen=0;
	}
	else if(GFX_Display)
		UnlockPubScreen(NULL,GFX_Display);

	GFX_Display = NULL;
}

static int CGX_Available(void)
{
	struct Library *l;

	l = OpenLibrary("cybergraphics.library",0L);

	if ( l != NULL ) {
		D(bug("CGX video device AVAILABLE\n"));
		CloseLibrary(l);
	}
	D(else bug("**CGX video device UNAVAILABLE\n"));

	return(l != NULL);
}

static void CGX_DeleteDevice(SDL_VideoDevice *device)
{
	if ( device ) {
		if ( device->hidden ) {
			free(device->hidden);
		}
		if ( device->gl_data ) {
			free(device->gl_data);
		}
		free(device);
	}
}

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

	/* Initialize all variables that we clean on shutdown */
	device = (SDL_VideoDevice *)malloc(sizeof(SDL_VideoDevice));
	if ( device ) {
		memset(device, 0, (sizeof *device));
		device->hidden = (struct SDL_PrivateVideoData *)
				malloc((sizeof *device->hidden));
		device->gl_data = (struct SDL_PrivateGLData *)
				malloc((sizeof *device->gl_data));
	}
	if ( (device == NULL) || (device->hidden == NULL) ||
	                         (device->gl_data == NULL) ) {
		D(bug("Unable to create video device!\n"));
		SDL_OutOfMemory();
		CGX_DeleteDevice(device);
		return(0);
	}
	memset(device->hidden, 0, sizeof(*device->hidden));
	memset(device->gl_data, 0, sizeof(*device->gl_data));

	/* Set the driver flags */
	device->handles_any_size = 1;

	/* Set the function pointers */
	device->VideoInit = CGX_VideoInit;
	device->ListModes = CGX_ListModes;
	device->SetVideoMode = CGX_SetVideoMode;
	device->ToggleFullScreen = CGX_ToggleFullScreen;
	device->UpdateMouse = CGX_UpdateMouse;
#ifdef XFREE86_XV
	device->CreateYUVOverlay = X11_CreateYUVOverlay;
#endif
	device->SetColors = CGX_SetColors;
	device->UpdateRects = NULL;
	device->VideoQuit = CGX_VideoQuit;
	device->AllocHWSurface = CGX_AllocHWSurface;
	device->CheckHWBlit = CGX_CheckHWBlit;
	device->FillHWRect = CGX_FillHWRect;
	device->SetHWColorKey = CGX_SetHWColorKey;
	device->SetHWAlpha = NULL;
	device->LockHWSurface = CGX_LockHWSurface;
	device->UnlockHWSurface = CGX_UnlockHWSurface;
	device->FlipHWSurface = CGX_FlipHWSurface;
	device->FreeHWSurface = CGX_FreeHWSurface;
	device->SetGamma = CGX_SetGamma;
	device->GetGamma = CGX_GetGamma;
	device->SetGammaRamp = CGX_SetGammaRamp;
	device->GetGammaRamp = NULL;
#ifdef HAVE_OPENGL
	device->GL_LoadLibrary = CGX_GL_LoadLibrary;
	device->GL_GetProcAddress = CGX_GL_GetProcAddress;
	device->GL_GetAttribute = CGX_GL_GetAttribute;
	device->GL_MakeCurrent = CGX_GL_MakeCurrent;
	device->GL_SwapBuffers = CGX_GL_SwapBuffers;
#endif
	device->SetIcon = CGX_SetIcon;
	device->SetCaption = CGX_SetCaption;
	device->IconifyWindow = NULL; /* CGX_IconifyWindow; */
	device->GrabInput = NULL /* CGX_GrabInput*/;
	device->GetWMInfo = CGX_GetWMInfo;
	device->FreeWMCursor = amiga_FreeWMCursor;
	device->CreateWMCursor = amiga_CreateWMCursor;
	device->ShowWMCursor = amiga_ShowWMCursor;
	device->WarpWMCursor = amiga_WarpWMCursor;
	device->CheckMouseMode = amiga_CheckMouseMode;
	device->InitOSKeymap = amiga_InitOSKeymap;
	device->PumpEvents = amiga_PumpEvents;

	device->free = CGX_DeleteDevice;

	return device;
}

VideoBootStrap CGX_bootstrap = {
	"CGX", "AmigaOS CyberGraphics", CGX_Available, CGX_CreateDevice
};

Uint32 MakeBitMask(_THIS,int type,int format,int *bpp)
{
	D(if(type==0)bug("REAL pixel format: "));

	if(this->hidden->depth==*bpp)
	{

	switch(format)
    	{
		case PIXFMT_LUT8:
			D(if(type==0)bug("LUT8\n"));
			return 0;
		case PIXFMT_BGR15:
		case PIXFMT_RGB15PC:
			switch(type)
			{
				case 0:
					D(bug("RGB15PC/BGR15\n"));
					return 31;
				case 1:
					return 992;
				case 2:
					return 31744;
			}
		case PIXFMT_RGB15:
		case PIXFMT_BGR15PC:
			switch(type)
			{
				case 0:
					D(bug("RGB15/BGR15PC\n"));
					return 31744;
				case 1:
					return 992;
				case 2:
					return 31;
			}
		case PIXFMT_BGR16PC:
		case PIXFMT_RGB16:
			switch(type)
			{
				case 0:
					D(bug("RGB16PC\n"));
					return 63488;
				case 1:
					return 2016;
				case 2:
					return 31;
			}
		case PIXFMT_BGR16:
		case PIXFMT_RGB16PC:
			switch(type)
			{
				case 0:
					D(bug("RGB16PC/BGR16\n"));
					return 31;
				case 1:
					return 2016;
				case 2:
					return 63488;
			}

		case PIXFMT_RGB24:
			switch(type)
			{
				case 0:
					D(bug("RGB24/BGR24\n"));
					return 0xff0000;
				case 1:
					return 0xff00;
				case 2:
					return 0xff;
			}
		case PIXFMT_BGR24:
			switch(type)
			{
				case 0:
					D(bug("BGR24\n"));
					return 0xff;
				case 1:
					return 0xff00;
				case 2:
					return 0xff0000;
			}
		case PIXFMT_ARGB32:
			switch(type)
			{
				case 0:
					D(bug("ARGB32\n"));
					return 0xff0000;
				case 1:
					return 0xff00;
				case 2:
					return 0xff;
			}
		case PIXFMT_BGRA32:
			switch(type)
			{
				case 0:
					D(bug("BGRA32\n"));
					return 0xff00;
				case 1:
					return 0xff0000;
				case 2:
					return 0xff000000;
			}
		case PIXFMT_RGBA32:
			switch(type)
			{
				case 0:
					D(bug("RGBA32\n"));
					return 0xff000000;
				case 1:
					return 0xff0000;
				case 2:
					return 0xff00;
			}
		default:
			D(bug("Unknown pixel format! Default to 24bit\n"));
			return (Uint32) (255<<(type*8));
	}
	}
	else
	{
		D(if(type==0)bug("DIFFERENT from screen.\nAllocated screen format: "));

		switch(*bpp)
		{
			case 32:
				D(if(type==0) bug("RGBA32\n"));
				switch(type)
				{
					case 0:
						return 0xff000000;
					case 1:
						return 0xff0000;
					case 2:
						return 0xff00;
				}
				break;
			case 24:
use_truecolor:
				switch(type)
				{
					case 0:
						D(bug("RGB24\n"));
						return 0xff0000;
					case 1:
						return 0xff00;
					case 2:
						return 0xff;
				}
			case 16:
			case 15:
				D(if(type==0) bug("Not supported, switching to 24bit!\n"));
				*bpp=24;
				goto use_truecolor;
				break;
			default:
				D(if(type==0)bug("This is a chunky display\n"));
// For chunky display mask is always 0;
				return 0;
		}
	}
	return 0;
}

static int CGX_VideoInit(_THIS, SDL_PixelFormat *vformat)
{
	int i;
	struct Library *RTGBase;

	D(bug("VideoInit... Opening libraries\n"));

	if(!IntuitionBase) {
		if( !(IntuitionBase=(struct IntuitionBase *)OpenLibrary("intuition.library",39L))) {
			SDL_SetError("Couldn't open intuition V39+");
			return -1;
		}
	}

	if(!GfxBase) {
		if( !(GfxBase=(struct GfxBase *)OpenLibrary("graphics.library",39L))) {
			SDL_SetError("Couldn't open graphics V39+");
			return -1;
		}
	}

	if(!CyberGfxBase) {
		if( !(CyberGfxBase=OpenLibrary("cybergraphics.library",40L))) {
			SDL_SetError("Couldn't open cybergraphics.");