/*

SDL - Simple DirectMedia Layer

Copyright (C) 1997-2006 Sam Lantinga

This library is free software; you can redistribute it and/or

modify it under the terms of the GNU Lesser General Public

License as published by the Free Software Foundation; either

version 2.1 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

Lesser General Public License for more details.

You should have received a copy of the GNU Lesser General Public

License along with this library; if not, write to the Free Software

Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA

Sam Lantinga

slouken@libsdl.org

*/

/* This is the DirectDraw implementation of YUV video overlays */

#include "SDL_stdlib.h"

#include "SDL_string.h"

#include "SDL_error.h"

#include "SDL_video.h"

#include "SDL_dx5yuv_c.h"

#include "SDL_yuvfuncs.h"

//#define USE_DIRECTX_OVERLAY

/* The functions used to manipulate software video overlays */

static struct private_yuvhwfuncs dx5_yuvfuncs = {

DX5_LockYUVOverlay,

DX5_UnlockYUVOverlay,

DX5_DisplayYUVOverlay,

DX5_FreeYUVOverlay

};

struct private_yuvhwdata {

};

static LPDIRECTDRAWSURFACE3 CreateYUVSurface(_THIS,

int width, int height, Uint32 format)

{

HRESULT result;

LPDIRECTDRAWSURFACE dd_surface1;

LPDIRECTDRAWSURFACE3 dd_surface3;

DDSURFACEDESC ddsd;

/* Set up the surface description */

SDL_memset(&ddsd, 0, sizeof(ddsd));

ddsd.dwSize = sizeof(ddsd);

ddsd.dwFlags = (DDSD_WIDTH|DDSD_HEIGHT|DDSD_CAPS|DDSD_PIXELFORMAT);

ddsd.dwWidth = width;

ddsd.dwHeight= height;

#ifdef USE_DIRECTX_OVERLAY

ddsd.ddsCaps.dwCaps = (DDSCAPS_OVERLAY|DDSCAPS_VIDEOMEMORY);

#else

ddsd.ddsCaps.dwCaps = (DDSCAPS_OFFSCREENPLAIN|DDSCAPS_VIDEOMEMORY);

#endif

ddsd.ddpfPixelFormat.dwSize = sizeof(ddsd.ddpfPixelFormat);

ddsd.ddpfPixelFormat.dwFlags = DDPF_FOURCC;

ddsd.ddpfPixelFormat.dwFourCC = format;

/* Create the DirectDraw video surface */

result = IDirectDraw2_CreateSurface(ddraw2, &ddsd, &dd_surface1, NULL);

if ( result != DD_OK ) {

SetDDerror("DirectDraw2::CreateSurface", result);

return(NULL);

}

result = IDirectDrawSurface_QueryInterface(dd_surface1,

&IID_IDirectDrawSurface3, (LPVOID *)&dd_surface3);

IDirectDrawSurface_Release(dd_surface1);

if ( result != DD_OK ) {

SetDDerror("DirectDrawSurface::QueryInterface", result);

return(NULL);

}

/* Make sure the surface format was set properly */

SDL_memset(&ddsd, 0, sizeof(ddsd));

ddsd.dwSize = sizeof(ddsd);

result = IDirectDrawSurface3_Lock(dd_surface3, NULL,

&ddsd, DDLOCK_NOSYSLOCK, NULL);

if ( result != DD_OK ) {

SetDDerror("DirectDrawSurface3::Lock", result);

IDirectDrawSurface_Release(dd_surface3);

return(NULL);

}

IDirectDrawSurface3_Unlock(dd_surface3, NULL);

if ( !(ddsd.ddpfPixelFormat.dwFlags & DDPF_FOURCC) ||

(ddsd.ddpfPixelFormat.dwFourCC != format) ) {

SDL_SetError("DDraw didn't use requested FourCC format");

IDirectDrawSurface_Release(dd_surface3);

return(NULL);

}

/* We're ready to go! */

return(dd_surface3);

}

#ifdef DEBUG_YUV

static char *PrintFOURCC(Uint32 code)

{

static char buf[5];

buf[3] = code >> 24;

buf[2] = (code >> 16) & 0xFF;

buf[1] = (code >> 8) & 0xFF;

buf[0] = (code & 0xFF);

return(buf);

}

#endif

SDL_Overlay *DX5_CreateYUVOverlay(_THIS, int width, int height, Uint32 format, SDL_Surface *display)

{

SDL_Overlay *overlay;

struct private_yuvhwdata *hwdata;

#ifdef DEBUG_YUV

DWORD numcodes;

DWORD *codes;

printf("FOURCC format requested: 0x%x\n", PrintFOURCC(format));

IDirectDraw2_GetFourCCCodes(ddraw2, &numcodes, NULL);

if ( numcodes ) {

DWORD i;

codes = SDL_malloc(numcodes*sizeof(*codes));

if ( codes ) {

IDirectDraw2_GetFourCCCodes(ddraw2, &numcodes, codes);

for ( i=0; i<numcodes; ++i ) {

fprintf(stderr, "Code %d: 0x%x\n", i, PrintFOURCC(codes[i]));

}

SDL_free(codes);

}

} else {

fprintf(stderr, "No FOURCC codes supported\n");

}

#endif

/* Create the overlay structure */

overlay = (SDL_Overlay *)SDL_malloc(sizeof *overlay);

if ( overlay == NULL ) {

SDL_OutOfMemory();

return(NULL);

}

SDL_memset(overlay, 0, (sizeof *overlay));

/* Fill in the basic members */

overlay->format = format;

overlay->w = width;

overlay->h = height;

/* Set up the YUV surface function structure */

overlay->hwfuncs = &dx5_yuvfuncs;

/* Create the pixel data and lookup tables */

hwdata = (struct private_yuvhwdata *)SDL_malloc(sizeof *hwdata);

overlay->hwdata = hwdata;

if ( hwdata == NULL ) {

SDL_OutOfMemory();

SDL_FreeYUVOverlay(overlay);

return(NULL);

}

hwdata->surface = CreateYUVSurface(this, width, height, format);

if ( hwdata->surface == NULL ) {

SDL_FreeYUVOverlay(overlay);

return(NULL);

}

overlay->hw_overlay = 1;

/* Set up the plane pointers */

overlay->pitches = hwdata->pitches;

overlay->pixels = hwdata->planes;

switch (format) {

case SDL_YV12_OVERLAY:

case SDL_IYUV_OVERLAY:

overlay->planes = 3;

break;

default:

overlay->planes = 1;

break;

}

/* We're all done.. */

return(overlay);

}

int DX5_LockYUVOverlay(_THIS, SDL_Overlay *overlay)

{

HRESULT result;

LPDIRECTDRAWSURFACE3 surface;

DDSURFACEDESC ddsd;

surface = overlay->hwdata->surface;

SDL_memset(&ddsd, 0, sizeof(ddsd));

ddsd.dwSize = sizeof(ddsd);

result = IDirectDrawSurface3_Lock(surface, NULL,

&ddsd, DDLOCK_NOSYSLOCK, NULL);

if ( result == DDERR_SURFACELOST ) {

result = IDirectDrawSurface3_Restore(surface);

result = IDirectDrawSurface3_Lock(surface, NULL, &ddsd,

(DDLOCK_NOSYSLOCK|DDLOCK_WAIT), NULL);

}

if ( result != DD_OK ) {

SetDDerror("DirectDrawSurface3::Lock", result);

return(-1);

}

/* Find the pitch and offset values for the overlay */

#if defined(NONAMELESSUNION)

overlay->pitches[0] = (Uint16)ddsd.u1.lPitch;

#else

overlay->pitches[0] = (Uint16)ddsd.lPitch;

#endif

overlay->pixels[0] = (Uint8 *)ddsd.lpSurface;

switch (overlay->format) {

case SDL_YV12_OVERLAY:

case SDL_IYUV_OVERLAY:

/* Add the two extra planes */

overlay->pitches[1] = overlay->pitches[0] / 2;

overlay->pitches[2] = overlay->pitches[0] / 2;

overlay->pixels[1] = overlay->pixels[0] +

overlay->pitches[0] * overlay->h;

overlay->pixels[2] = overlay->pixels[1] +

overlay->pitches[1] * overlay->h / 2;

break;

default:

/* Only one plane, no worries */

break;

}

return(0);

}

void DX5_UnlockYUVOverlay(_THIS, SDL_Overlay *overlay)

{

LPDIRECTDRAWSURFACE3 surface;

surface = overlay->hwdata->surface;

IDirectDrawSurface3_Unlock(surface, NULL);

}

int DX5_DisplayYUVOverlay(_THIS, SDL_Overlay *overlay, SDL_Rect *dstrect)

{

HRESULT result;

LPDIRECTDRAWSURFACE3 surface;

RECT src, dst;

surface = overlay->hwdata->surface;

src.top = 0;

src.bottom = overlay->h;

src.left = 0;

src.right = overlay->w;

dst.top = SDL_bounds.top+dstrect->y;

dst.left = SDL_bounds.left+dstrect->x;

dst.bottom = dst.top+dstrect->h;

dst.right = dst.left+dstrect->w;

#ifdef USE_DIRECTX_OVERLAY

result = IDirectDrawSurface3_UpdateOverlay(surface, &src,

SDL_primary, &dst, DDOVER_SHOW, NULL);

if ( result != DD_OK ) {

SetDDerror("DirectDrawSurface3::UpdateOverlay", result);

return(-1);

}

#else

result = IDirectDrawSurface3_Blt(SDL_primary, &dst, surface, &src,

DDBLT_WAIT, NULL);

if ( result != DD_OK ) {

SetDDerror("DirectDrawSurface3::Blt", result);

return(-1);

}

#endif

return(0);

}

void DX5_FreeYUVOverlay(_THIS, SDL_Overlay *overlay)

{

struct private_yuvhwdata *hwdata;

hwdata = overlay->hwdata;

if ( hwdata ) {

if ( hwdata->surface ) {

IDirectDrawSurface_Release(hwdata->surface);

}

SDL_free(hwdata);

}

}