path: root/libvo/vo_sdl.c

/*
 *  vo_sdl.c
 *
 *  (was video_out_sdl.c from OMS project/mpeg2dec -> http://linuxvideo.org)
 *
 *  Copyright (C) Ryan C. Gordon <icculus@lokigames.com> - April 22, 2000
 *
 *  Copyright (C) Felix Buenemann <atmosfear@users.sourceforge.net> - 2001
 *
 *  (for extensive code enhancements)
 *
 *  Current maintainer for MPlayer project (report bugs to that address):
 *    Felix Buenemann <atmosfear@users.sourceforge.net>
 *
 *  This file is a video out driver using the SDL library (http://libsdl.org/),
 *  to be used with MPlayer, further info from http://www.mplayerhq.hu
 *
 *  -- old disclaimer --
 *
 *  A mpeg2dec display driver that does output through the
 *  Simple DirectMedia Layer (SDL) library. This effectively gives us all
 *  sorts of output options: X11, SVGAlib, fbcon, AAlib, GGI. Win32, MacOS
 *  and BeOS support, too. Yay. SDL info, source, and binaries can be found
 *  at http://slouken.devolution.com/SDL/
 *
 *  -- end old disclaimer --
 *
 * This file is part of MPlayer.
 *
 * MPlayer 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.
 *
 * MPlayer 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 MPlayer; if not, write to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 */

/* define to force software-surface (video surface stored in system memory)*/
#undef SDL_NOHWSURFACE

/* define to enable surface locks, this might be needed on SMP machines */
#undef SDL_ENABLE_LOCKS

/* MONITOR_ASPECT MUST BE FLOAT */
#define MONITOR_ASPECT 4.0/3.0

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

#include "config.h"
#include "mp_msg.h"
#include "mp_msg.h"
#include "video_out.h"
#include "video_out_internal.h"

#include "fastmemcpy.h"
#include "sub/sub.h"
#include "aspect.h"
#include "libmpcodecs/vfcap.h"
#include "mpbswap.h"

#ifdef CONFIG_X11
#include <X11/Xlib.h>
#include "x11_common.h"
#endif

#include "subopt-helper.h"

static const vo_info_t info =
{
	"SDL YUV/RGB/BGR renderer (SDL v1.1.7+ only!)",
	"sdl",
	"Ryan C. Gordon <icculus@lokigames.com>, Felix Buenemann <atmosfear@users.sourceforge.net>",
	""
};

const LIBVO_EXTERN(sdl)

#include "sdl_common.h"
//#include <SDL/SDL_syswm.h>


#ifdef SDL_ENABLE_LOCKS
#define	SDL_OVR_LOCK(x)        if (SDL_LockYUVOverlay (priv->overlay)) { \
 				mp_msg(MSGT_VO,MSGL_V, "SDL: Couldn't lock YUV overlay\n"); \
				return x; \
	    		    }
#define SDL_OVR_UNLOCK      SDL_UnlockYUVOverlay (priv->overlay);

#define SDL_SRF_LOCK(srf, x)   if(SDL_MUSTLOCK(srf)) { \
				if(SDL_LockSurface (srf)) { \
 					mp_msg(MSGT_VO,MSGL_V, "SDL: Couldn't lock RGB surface\n"); \
					return x; \
				} \
			    }

#define SDL_SRF_UNLOCK(srf) if(SDL_MUSTLOCK(srf)) \
				SDL_UnlockSurface (srf);
#else
#define SDL_OVR_LOCK(x)
#define SDL_OVR_UNLOCK
#define SDL_SRF_LOCK(srf, x)
#define SDL_SRF_UNLOCK(srf)
#endif

/** Private SDL Data structure **/

static struct sdl_priv_s {

	/* output driver used by sdl */
	char driver[8];

	/* SDL display surface */
	SDL_Surface *surface;

	/* SDL RGB surface */
	SDL_Surface *rgbsurface;

	/* SDL YUV overlay */
	SDL_Overlay *overlay;

	/* available fullscreen modes */
	SDL_Rect **fullmodes;

	/* surface attributes for fullscreen and windowed mode */
	Uint32 sdlflags, sdlfullflags;

	/* save the windowed output extents */
	SDL_Rect windowsize;

	/* Bits per Pixel */
	Uint8 bpp;

	/* RGB or YUV? */
	Uint8 mode;
	#define YUV 0
	#define RGB 1
	#define BGR 2

	/* use direct blitting to surface */
	int dblit;

	/* current fullscreen mode, 0 = highest available fullscreen mode */
	int fullmode;

	/* YUV ints */
	int framePlaneY, framePlaneUV, framePlaneYUY;
	int stridePlaneY, stridePlaneUV, stridePlaneYUY;

	/* RGB ints */
	int framePlaneRGB;
	int stridePlaneRGB;

	/* Flip image */
	int flip;

	/* fullscreen behaviour; see init */
	int fulltype;

	/* is X running (0/1) */
	int X;

	/* X11 Resolution */
	int XWidth, XHeight;

        /* original image dimensions */
	int width, height;

	/* destination dimensions */
	int dstwidth, dstheight;

    /* Draw image at coordinate y on the SDL surfaces */
    int y;

    /* The image is displayed between those y coordinates in priv->surface */
    int y_screen_top, y_screen_bottom;

    /* 1 if the OSD has changed otherwise 0 */
    int osd_has_changed;

	/* source image format (YUV/RGB/...) */
    uint32_t format;

    /* dirty_off_frame[0] contains a bounding box around the osd contents drawn above the image
       dirty_off_frame[1] is the corresponding thing for OSD contents drawn below the image
    */
    SDL_Rect dirty_off_frame[2];
} sdl_priv;

static void erase_area_4(int x_start, int width, int height, int pitch, uint32_t color, uint8_t* pixels);
static void erase_area_1(int x_start, int width, int height, int pitch, uint8_t color, uint8_t* pixels);
static int setup_surfaces(void);
static void set_video_mode(int width, int height, int bpp, uint32_t sdlflags);
static void erase_rectangle(int x, int y, int w, int h);

/* Expand 'rect' to contain the rectangle specified by x, y, w and h */
static void expand_rect(SDL_Rect* rect, int x, int y, int w, int h)
{
    if(rect->x < 0 || rect->y < 0) {
        rect->x = x;
        rect->y = y;
        rect->w = w;
        rect->h = h;
        return;
    }

    if(rect->x > x)
        rect->x = x;

    if(rect->y > y)
        rect->y = y;

    if(rect->x + rect->w < x + w)
        rect->w = x + w - rect->x;

    if(rect->y + rect->h < y + h)
        rect->h = y + h - rect->y;
}

/** libvo Plugin functions **/

/**
 * draw_alpha is used for osd and subtitle display.
 *
 **/

static void draw_alpha(int x0,int y0, int w,int h, unsigned char* src, unsigned char *srca, int stride){
	struct sdl_priv_s *priv = &sdl_priv;

    if(priv->osd_has_changed) {
        /* OSD did change. Store a bounding box of everything drawn into the OSD */
        if(priv->y >= y0) {
            /* Make sure we don't mark part of the frame area dirty */
            if(h + y0 > priv->y)
                expand_rect(&priv->dirty_off_frame[0], x0, y0, w, priv->y - y0);
            else
                expand_rect(&priv->dirty_off_frame[0], x0, y0, w, h);
        }
        else if(priv->y + priv->height <= y0 + h) {
            /* Make sure we don't mark part of the frame area dirty */