SDL_DirectFB_yuv.c
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/*
SDL - Simple DirectMedia Layer
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Copyright (C) 1997-2009 Sam Lantinga
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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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
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Lesser General Public License for more details.
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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
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Sam Lantinga
slouken@libsdl.org
*/
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#include "SDL_config.h"
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/* This is the DirectFB implementation of YUV video overlays */
#include "SDL_video.h"
#include "SDL_DirectFB_yuv.h"
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#include "../SDL_yuvfuncs.h"
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/* The functions used to manipulate software video overlays */
static struct private_yuvhwfuncs directfb_yuvfuncs = {
DirectFB_LockYUVOverlay,
DirectFB_UnlockYUVOverlay,
DirectFB_DisplayYUVOverlay,
DirectFB_FreeYUVOverlay
};
struct private_yuvhwdata {
DFBDisplayLayerID layer_id;
IDirectFBDisplayLayer *layer;
IDirectFBSurface *surface;
/* These are just so we don't have to allocate them separately */
Uint16 pitches[3];
Uint8 *planes[3];
};
static DFBEnumerationResult
enum_layers_callback( DFBDisplayLayerID id,
DFBDisplayLayerDescription desc,
void *data )
{
struct private_yuvhwdata *hwdata = (struct private_yuvhwdata *) data;
/* we don't want the primary */
if (id == DLID_PRIMARY)
return DFENUM_OK;
/* take the one with a surface for video */
if ((desc.caps & DLCAPS_SURFACE) && (desc.type & DLTF_VIDEO))
{
hwdata->layer_id = id;
return DFENUM_CANCEL;
}
return DFENUM_OK;
}
static DFBResult CreateYUVSurface(_THIS, struct private_yuvhwdata *hwdata,
int width, int height, Uint32 format)
{
DFBResult ret;
IDirectFB *dfb = HIDDEN->dfb;
IDirectFBDisplayLayer *layer;
DFBDisplayLayerConfig conf;
ret = dfb->EnumDisplayLayers (dfb, enum_layers_callback, hwdata);
if (ret)
{
SetDirectFBerror("IDirectFB::EnumDisplayLayers", ret);
return ret;
}
if (!hwdata->layer_id)
return DFB_UNSUPPORTED;
ret = dfb->GetDisplayLayer (dfb, hwdata->layer_id, &layer);
if (ret)
{
SetDirectFBerror("IDirectFB::GetDisplayLayer", ret);
return ret;
}
conf.flags = DLCONF_WIDTH | DLCONF_HEIGHT | DLCONF_PIXELFORMAT;
conf.width = width;
conf.height = height;
switch (format)
{
case SDL_YV12_OVERLAY:
conf.pixelformat = DSPF_YV12;
break;
case SDL_IYUV_OVERLAY:
conf.pixelformat = DSPF_I420;
break;
case SDL_YUY2_OVERLAY:
conf.pixelformat = DSPF_YUY2;
break;
case SDL_UYVY_OVERLAY:
conf.pixelformat = DSPF_UYVY;
break;
default:
fprintf (stderr, "SDL_DirectFB: Unsupported YUV format (0x%08x)!\n", format);
break;
}
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/* Need to set coop level or newer DirectFB versions will fail here. */
ret = layer->SetCooperativeLevel (layer, DLSCL_ADMINISTRATIVE);
if (ret)
{
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SetDirectFBerror("IDirectFBDisplayLayer::SetCooperativeLevel() failed", ret);
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layer->Release (layer);
return ret;
}
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ret = layer->SetConfiguration (layer, &conf);
if (ret)
{
SetDirectFBerror("IDirectFBDisplayLayer::SetConfiguration", ret);
layer->Release (layer);
return ret;
}
ret = layer->GetSurface (layer, &hwdata->surface);
if (ret)
{
SetDirectFBerror("IDirectFBDisplayLayer::GetSurface", ret);
layer->Release (layer);
return ret;
}
hwdata->layer = layer;
return DFB_OK;
}
SDL_Overlay *DirectFB_CreateYUVOverlay(_THIS, int width, int height, Uint32 format, SDL_Surface *display)
{
SDL_Overlay *overlay;
struct private_yuvhwdata *hwdata;
/* Create the overlay structure */
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overlay = SDL_calloc (1, sizeof(SDL_Overlay));
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if (!overlay)
{
SDL_OutOfMemory();
return NULL;
}
/* Fill in the basic members */
overlay->format = format;
overlay->w = width;
overlay->h = height;
/* Set up the YUV surface function structure */
overlay->hwfuncs = &directfb_yuvfuncs;
/* Create the pixel data and lookup tables */
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hwdata = SDL_calloc(1, sizeof(struct private_yuvhwdata));
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overlay->hwdata = hwdata;
if (!hwdata)
{
SDL_OutOfMemory();
SDL_FreeYUVOverlay (overlay);
return NULL;
}
if (CreateYUVSurface (this, hwdata, width, height, format))
{
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 DirectFB_LockYUVOverlay(_THIS, SDL_Overlay *overlay)
{
DFBResult ret;
void *data;
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IDirectFBSurface *surface = overlay->hwdata->surface;
ret = surface->Lock (surface, DSLF_READ | DSLF_WRITE, &data, &pitch);
if (ret)
{
SetDirectFBerror("IDirectFBSurface::Lock", ret);
return -1;
}
/* Find the pitch and offset values for the overlay */
overlay->pitches[0] = (Uint16) pitch;
overlay->pixels[0] = (Uint8*) data;
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 DirectFB_UnlockYUVOverlay(_THIS, SDL_Overlay *overlay)
{
IDirectFBSurface *surface = overlay->hwdata->surface;
overlay->pixels[0] = overlay->pixels[1] = overlay->pixels[2] = NULL;
surface->Unlock (surface);
}
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int DirectFB_DisplayYUVOverlay(_THIS, SDL_Overlay *overlay, SDL_Rect *src, SDL_Rect *dst)
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{
DFBResult ret;
DFBDisplayLayerConfig conf;
IDirectFBDisplayLayer *primary = HIDDEN->layer;
IDirectFBDisplayLayer *layer = overlay->hwdata->layer;
primary->GetConfiguration (primary, &conf);
ret = layer->SetScreenLocation (layer,
dst->x / (float) conf.width, dst->y / (float) conf.height,
dst->w / (float) conf.width, dst->h / (float) conf.height );
if (ret)
{
SetDirectFBerror("IDirectFBDisplayLayer::SetScreenLocation", ret);
return -1;
}
return 0;
}
void DirectFB_FreeYUVOverlay(_THIS, SDL_Overlay *overlay)
{
struct private_yuvhwdata *hwdata;
hwdata = overlay->hwdata;
if (hwdata)
{
if (hwdata->surface)
hwdata->surface->Release (hwdata->surface);
if (hwdata->layer)
hwdata->layer->Release (hwdata->layer);
free (hwdata);
}
}