source: svn/zas_dstar/pdrivers/video_out_sdl.c @ 22

/*
 * video_out_sdl.c
 *
 * Copyright (C) 2000-2003 Ryan C. Gordon <icculus@lokigames.com> and
 *                         Dominik Schnitzer <aeneas@linuxvideo.org>
 *
 * SDL info, source, and binaries can be found at http://www.libsdl.org/
 *
 * This file is part of mpeg2dec, a free MPEG-2 video stream decoder.
 * See http://libmpeg2.sourceforge.net/ for updates.
 *
 * mpeg2dec 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.
 *
 * mpeg2dec 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  02111-1307  USA
 */

//#include "config.h"

#define SCALE_FACTOR    2
#define SCALE_SHIFT     (SCALE_FACTOR>>1)

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "SDL.h"
#include <inttypes.h>

#include "dsthallocal.h"
#include "mpeg2priv.h"
#if 0
#include "video_out.h"
#include "vo_internal.h"
#endif
extern void DD_GFX_UpdateScreen(void);

#define MAX_OVERLAY_TABLE       36

//extern DS_U32 DD_GFX_GetPhysicalFrameBuffer(void);
extern DS_U32 DD_GFX_GetVideoFrameBuffer(void);

static SDL_Overlay *private_overlay = (SDL_Overlay *)NULL;
static int i_overlay_idx = 0;
static SDL_Overlay *overlay_table[MAX_OVERLAY_TABLE] = { (SDL_Overlay *)NULL };

void sdl_setup_fbuf (sdl_instance_t * _instance,
                unsigned char ** buf, void ** id)
{
    sdl_instance_t * instance = (sdl_instance_t *) _instance;
    SDL_Overlay * overlay;

    if ( private_overlay == (SDL_Overlay *)NULL )
    {
        int i;
        
        private_overlay = SDL_CreateYUVOverlay (instance->width>>SCALE_SHIFT, instance->height>>SCALE_SHIFT,
                                          SDL_YV12_OVERLAY, instance->surface);
        for (i=0; i<MAX_OVERLAY_TABLE; i++)
            overlay_table[i] = SDL_CreateYUVOverlay (instance->width, instance->height,
                                          SDL_YV12_OVERLAY, instance->surface);
        i_overlay_idx = 0;
    }

#if 0
    *id = overlay = SDL_CreateYUVOverlay (instance->width, instance->height,
                                          SDL_YV12_OVERLAY, instance->surface);
#else
    *id = overlay = overlay_table[i_overlay_idx++];
    if ( i_overlay_idx >= MAX_OVERLAY_TABLE )
        i_overlay_idx = 0;
#endif
        if ( overlay == NULL )
        {
            printf("SDL_CreateYUVOverlay: %s\n", SDL_GetError());
            fprintf(stderr, "!!! cannot allocate overlay.\n");
            return;
        }
        
    buf[0] = overlay->pixels[0];
    buf[1] = overlay->pixels[2];
    buf[2] = overlay->pixels[1];
    if (((long)buf[0] & 15) || ((long)buf[1] & 15) || ((long)buf[2] & 15)) {
            fprintf (stderr, "Unaligned buffers. Anyone know how to fix this ?\n");
            return;
    }
}

void sdl_start_fbuf (sdl_instance_t * instance,
                            const unsigned char* buf, void * id)
{
    if ( instance->surface == NULL )
        return;

    SDL_LockYUVOverlay ((SDL_Overlay *) id);
}

void sdl_draw_frame (sdl_instance_t * _instance,
                            const unsigned char * buf, void * id)
{
    sdl_instance_t * instance = (sdl_instance_t *) _instance;
    SDL_Overlay * overlay = (SDL_Overlay *) id;
//    SDL_Event event;
    int n, x, y;
    int sw, sh, dw, dh;
    unsigned char *dp, *sp;

    if ( instance->surface == NULL )
        return;
        
#if 0
    while (SDL_PollEvent (&event))
        if (event.type == SDL_VIDEORESIZE)
            instance->surface =
                SDL_SetVideoMode (event.resize.w, event.resize.h,
                                  instance->bpp, instance->sdlflags);
#endif

    for (n=0; n<3; n++)
    {
        dp = private_overlay->pixels[n];
        dw = private_overlay->pitches[n];
        dh = private_overlay->h;

        sp = overlay->pixels[n];
        sw = overlay->pitches[n];
        sh = overlay->h;

        for (y=0; y<dh; y++)
        {
            for (x=0; x<dw; x++)
            {
                dp[x+y*dw] = sp[(x+y*sw)<<SCALE_SHIFT];
            }
        }
    }

//    SDL_DisplayYUVOverlay (overlay, &(instance->surface->clip_rect));
      SDL_DisplayYUVOverlay (private_overlay, &(instance->surface->clip_rect));
      //SDL_Flip( instance->surface );
      //DD_GFX_UpdateScreen();
      DHL_GFX_UpdateScreen(0);
}

void sdl_discard (sdl_instance_t * _instance,
                         const unsigned * buf, void * id)
{
    if ( _instance->surface == NULL )
        return;

    SDL_UnlockYUVOverlay ((SDL_Overlay *) id);
    //SDL_FreeYUVOverlay ((SDL_Overlay *) id);
}

int sdl_setup (sdl_instance_t * _instance, unsigned int width,
                      unsigned int height, unsigned int chroma_width,
                      unsigned int chroma_height)
{
    sdl_instance_t * instance;

    instance = (sdl_instance_t *) _instance;

    instance->width = width;
    instance->height = height;
    //instance->surface = SDL_SetVideoMode (width>>SCALE_SHIFT, height>>SCALE_SHIFT, instance->bpp, instance->sdlflags);
    //instance->surface = SDL_GetVideoSurface();
    instance->surface = (SDL_Surface *)DD_GFX_GetVideoFrameBuffer();
    if (! (instance->surface)) {
            fprintf (stderr, "sdl could not set the desired video mode\n");
            return 1;
    }

//    result->convert = NULL;
    return 0;
}

void sdl_discard_all_buffer(sdl_instance_t *instance)
{
    if ( private_overlay )
    {
        int i;

        SDL_FreeYUVOverlay( private_overlay );
        private_overlay = (SDL_Overlay *)NULL;

        for (i=0; i<MAX_OVERLAY_TABLE; i++)
        {
            SDL_FreeYUVOverlay( overlay_table[i] );
            overlay_table[i] = (SDL_Overlay *)NULL;
        }
        
        i_overlay_idx = 0;
    }
}

sdl_instance_t *sdl_open(int width, int height)
{
    sdl_instance_t *p;
    
    p = (sdl_instance_t *)malloc(sizeof(sdl_instance_t));
    if ( !p )
    {
        fprintf(stderr, "!!! cannot allocate sdl_instance_t\n");
        return (sdl_instance_t *)NULL;
    }

#if 0
    if (SDL_Init (SDL_INIT_VIDEO)) {
        fprintf (stderr, "sdl video initialization failed.\n");
        return NULL;
    }
#endif

    memset(p, 0, sizeof(sdl_instance_t));
    p->bpp = 32;
    p->sdlflags = SDL_HWSURFACE | SDL_RESIZABLE;
    //p->width = width;
    //p->height = height;
    
    return p;
}