sdl_ph_video.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, 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]
*/

#ifdef SAVE_RCSID
static char rcsid =
 "@(#) $Id: SDL_ph_video.c,v 1.4 2002/04/22 21:38:05 wmay Exp $";
#endif

#include <stdlib.h>
#include <stdio.h>
#include <unistd.h>
#include <string.h>
#include <sys/ioctl.h>

#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_ph_video.h"
#include "SDL_ph_modes_c.h"
#include "SDL_ph_image_c.h"
#include "SDL_ph_events_c.h"
#include "SDL_ph_mouse_c.h"
#include "SDL_ph_wm_c.h"
#include "SDL_phyuv_c.h"
#include "blank_cursor.h"

static int ph_VideoInit(_THIS, SDL_PixelFormat *vformat);
static SDL_Surface *ph_SetVideoMode(_THIS, SDL_Surface *current,
                int width, int height, int bpp, Uint32 flags);
static int ph_SetColors(_THIS, int firstcolor, int ncolors, SDL_Color *colors);
static void ph_VideoQuit(_THIS);
static void ph_DeleteDevice(SDL_VideoDevice *device);

#ifdef HAVE_OPENGL
int ph_SetupOpenGLContext(_THIS, int width, int height, int bpp, Uint32 flags);
static void ph_GL_SwapBuffers(_THIS);
static int ph_GL_GetAttribute(_THIS, SDL_GLattr attrib, int* value);
#endif /* HAVE_OPENGL */

static int ph_Available(void)
{
    int phstat=-1;

    phstat=PtInit(0);
    if (phstat==0)
    {
       return 1;
    }
    else
    {
       return 0;
    }
}

static SDL_VideoDevice *ph_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 = NULL;
    }
    if ( (device == NULL) || (device->hidden == NULL) ) {
        SDL_OutOfMemory();
        ph_DeleteDevice(device);
        return(0);
    }
    memset(device->hidden, 0, (sizeof *device->hidden));

    /* Set the driver flags */
    device->handles_any_size = 1; /* JB not true for fullscreen */

    /* Set the function pointers */
    device->CreateYUVOverlay = ph_CreateYUVOverlay;
    device->VideoInit = ph_VideoInit;
    device->ListModes = ph_ListModes;
    device->SetVideoMode = ph_SetVideoMode;
    device->ToggleFullScreen = ph_ToggleFullScreen;
    device->UpdateMouse = NULL;	
    device->SetColors = ph_SetColors;
    device->UpdateRects = NULL;         /* ph_ResizeImage */
    device->VideoQuit = ph_VideoQuit;
    device->AllocHWSurface = ph_AllocHWSurface;
    device->CheckHWBlit = NULL;
    device->FillHWRect = NULL;
    device->SetHWColorKey = NULL;
    device->SetHWAlpha = NULL;
    device->LockHWSurface = ph_LockHWSurface;
    device->UnlockHWSurface = ph_UnlockHWSurface;
    device->FlipHWSurface = ph_FlipHWSurface;
    device->FreeHWSurface = ph_FreeHWSurface;
    device->SetCaption = ph_SetCaption;
    device->SetIcon = NULL;
    device->IconifyWindow = ph_IconifyWindow;
    device->GrabInput = ph_GrabInput;
    device->GetWMInfo = ph_GetWMInfo;
    device->FreeWMCursor = ph_FreeWMCursor;
    device->CreateWMCursor = ph_CreateWMCursor;
    device->ShowWMCursor = ph_ShowWMCursor;
    device->WarpWMCursor = ph_WarpWMCursor;
    device->CheckMouseMode = ph_CheckMouseMode;
    device->InitOSKeymap = ph_InitOSKeymap;
    device->PumpEvents = ph_PumpEvents;

    /* OpenGL support. */
    device->GL_LoadLibrary = NULL;
    device->GL_GetProcAddress = NULL;
    device->GL_MakeCurrent = NULL;
#ifdef HAVE_OPENGL
    device->GL_SwapBuffers = ph_GL_SwapBuffers;
    device->GL_GetAttribute = ph_GL_GetAttribute;
#else
    device->GL_SwapBuffers = NULL;
    device->GL_GetAttribute = NULL;
#endif /* HAVE_OPENGL */

    device->free = ph_DeleteDevice;

    return device;
}

VideoBootStrap ph_bootstrap = {
    "photon", "QNX Photon video output",
    ph_Available, ph_CreateDevice
};

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

static int ph_VideoInit(_THIS, SDL_PixelFormat *vformat)
{
    PgVideoModeInfo_t my_mode_info;
    PgHWCaps_t my_hwcaps;

    window=NULL;
    desktoppal=SDLPH_PAL_NONE;
#ifdef HAVE_OPENGL
    oglctx=NULL;
#endif /* HAVE_OPENGL */
    
    captionflag=0;
    old_video_mode=-1;
    old_refresh_rate=-1;
	
    if (NULL == (event = malloc(EVENT_SIZE)))
    {
        exit(EXIT_FAILURE);
    }

    /* Create the blank cursor */
    SDL_BlankCursor = this->CreateWMCursor(this, blank_cdata, blank_cmask,
                                          (int)BLANK_CWIDTH, (int)BLANK_CHEIGHT,
                                          (int)BLANK_CHOTX, (int)BLANK_CHOTY);

    if (SDL_BlankCursor == NULL)
    {
        printf("ph_VideoInit: could not create blank cursor\n");
    }

    if (PgGetGraphicsHWCaps(&my_hwcaps) < 0)
    {
        fprintf(stderr,"ph_VideoInit: GetGraphicsHWCaps failed!! \n");
    }

    if (PgGetVideoModeInfo(my_hwcaps.current_video_mode, &my_mode_info) < 0)
    {
        fprintf(stderr,"ph_VideoInit:  PgGetVideoModeInfo failed\n");
    }

    /* We need to return BytesPerPixel as it in used by CreateRGBsurface */
    vformat->BitsPerPixel = my_mode_info.bits_per_pixel;
    vformat->BytesPerPixel = my_mode_info.bytes_per_scanline/my_mode_info.width;
    desktopbpp = my_mode_info.bits_per_pixel;
    
    /* save current palette */
    if (desktopbpp==8)
    {
        PgGetPalette(ph_palette);
    }
         
    currently_fullscreen = 0;
    
    this->info.wm_available = 1;
    
    return 0;
}

static SDL_Surface *ph_SetVideoMode(_THIS, SDL_Surface *current,
                int width, int height, int bpp, Uint32 flags)
{
    PgDisplaySettings_t settings;
    int mode;
    PtArg_t arg[32];
    PhDim_t dim;
    int rtnval;
    int i;
    unsigned long *tempptr;
    int pargc;

    dim.w=width;
    dim.h=height;

    /* Lock the event thread, in multi-threading environments */
    SDL_Lock_EventThread();

    current->flags = flags;

    /* create window if no OpenGL support selected */
    if ((flags & SDL_OPENGL)!=SDL_OPENGL)
    {
        pargc=0;

        PtSetArg(&arg[pargc++], Pt_ARG_DIM, &dim, 0);
        PtSetArg(&arg[pargc++], Pt_ARG_RESIZE_FLAGS, Pt_FALSE, Pt_RESIZE_XY_AS_REQUIRED);

        /* enable window minimizing */
        PtSetArg(&arg[pargc++], Pt_ARG_WINDOW_MANAGED_FLAGS, Pt_TRUE, Ph_WM_HIDE);

        /* remove border and caption if no frame flag selected */
        if ((flags & SDL_NOFRAME) == SDL_NOFRAME)
        {
            PtSetArg(&arg[pargc++], Pt_ARG_WINDOW_RENDER_FLAGS, Pt_FALSE, Ph_WM_RENDER_TITLE | Ph_WM_RENDER_BORDER);
        }
        else
        {
            PtSetArg(&arg[pargc++], Pt_ARG_WINDOW_RENDER_FLAGS, Pt_TRUE, Ph_WM_RENDER_TITLE | Ph_WM_RENDER_BORDER);
        }

        /* if window is not resizable then remove resize handles and maximize button */
        if ((flags & SDL_RESIZABLE) != SDL_RESIZABLE)
        {
            PtSetArg(&arg[pargc++], Pt_ARG_WINDOW_RENDER_FLAGS, Pt_FALSE, Ph_WM_RENDER_RESIZE | Ph_WM_RENDER_MAX);
            PtSetArg(&arg[pargc++], Pt_ARG_WINDOW_MANAGED_FLAGS, Pt_FALSE, Ph_WM_RESIZE | Ph_WM_MAX);
            PtSetArg(&arg[pargc++], Pt_ARG_WINDOW_NOTIFY_FLAGS, Pt_FALSE, Ph_WM_RESIZE | Ph_WM_MAX);
        }
        else
        {
            PtSetArg(&arg[pargc++], Pt_ARG_WINDOW_RENDER_FLAGS, Pt_TRUE, Ph_WM_RENDER_RESIZE | Ph_WM_RENDER_MAX);
            /* it is need to be Pt_FALSE to allow the application to process the resize callback */
            PtSetArg(&arg[pargc++], Pt_ARG_WINDOW_MANAGED_FLAGS, Pt_FALSE, Ph_WM_RESIZE | Ph_WM_MAX);
            PtSetArg(&arg[pargc++], Pt_ARG_WINDOW_NOTIFY_FLAGS, Pt_TRUE, Ph_WM_RESIZE | Ph_WM_MAX);
        }

        if (window!=NULL)
        {
            PtUnrealizeWidget(window);
            PtDestroyWidget(window);
            window=NULL;
        }

        window=PtCreateWidget(PtWindow, NULL, pargc, arg);
        PtRealizeWidget(window);
        
        PtFlush();
    }

#ifdef HAVE_OPENGL
    if (flags & SDL_OPENGL)
    {
        /* ph_SetupOpenGLContext creates also window as need */
        if (ph_SetupOpenGLContext(this, width, height, bpp, flags)==0)
        {
            /* setup OGL update function ... ugly method */
            ph_ResizeImage(this, current, flags); 
        }
        else
        {
            /* if context creation fail, report no OpenGL to high level */
            current->flags=(flags & (~SDL_OPENGL));
        }
#else
    if (flags & SDL_OPENGL) /* if no built-in OpenGL support */
    {
        fprintf(stderr, "error: no OpenGL support, try to recompile library.\n");
        current->flags=(flags & (~SDL_OPENGL));
        return NULL;
#endif /* HAVE_OPENGL */
    }
    else
    {
        /* Initialize the window */
        if (flags & SDL_FULLSCREEN) /* Direct Context , assume SDL_HWSURFACE also set */
        {
            /* Get the video mode and set it */
            if (flags & SDL_ANYFORMAT)
            {
                if ((mode = get_mode_any_format(width, height, bpp)) == 0)
                {
                    fprintf(stderr,"error: get_mode_any_format failed\n");
                    exit(1);
                }
            }
            else
            {
                if ((mode = get_mode(width, height, bpp)) == 0)
                {
                    fprintf(stderr,"error: get_mode failed\n");
                    exit(1);
                }
            }
            
            if (bpp==8)
            {