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SDL_sysyuv.cc
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/*
SDL - Simple DirectMedia Layer
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Copyright (C) 1997-2006 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 BeOS version of SDL YUV video overlays */
#include "SDL_video.h"
#include "SDL_sysyuv.h"
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#include "../SDL_yuvfuncs.h"
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/* The functions used to manipulate software video overlays */
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static struct private_yuvhwfuncs be_yuvfuncs = {
BE_LockYUVOverlay,
BE_UnlockYUVOverlay,
BE_DisplayYUVOverlay,
BE_FreeYUVOverlay
};
BBitmap *BE_GetOverlayBitmap (BRect bounds, color_space cs)
{
BBitmap *bbitmap;
bbitmap = new BBitmap (bounds, B_BITMAP_WILL_OVERLAY, cs);
if (!bbitmap || bbitmap->InitCheck () != B_OK) {
delete bbitmap;
return 0;
}
overlay_restrictions r;
bbitmap->GetOverlayRestrictions (&r);
uint32 width = bounds.IntegerWidth () + 1;
uint32 height = bounds.IntegerHeight () + 1;
uint32 width_padding = 0;
uint32 height_padding = 0;
if ((r.source.horizontal_alignment != 0) ||
(r.source.vertical_alignment != 0)) {
delete bbitmap;
return 0;
}
if (r.source.width_alignment != 0) {
uint32 aligned_width = r.source.width_alignment + 1;
if (width % aligned_width > 0) {
width_padding = aligned_width - width % aligned_width;
}
}
if (r.source.height_alignment != 0) {
uint32 aligned_height = r.source.height_alignment + 1;
if (height % aligned_height > 0) {
fprintf (stderr,
"GetOverlayBitmap failed height alignment\n");
fprintf (stderr, "- height = %lu, aligned_height = %lu\n",
height, aligned_height);
delete bbitmap;
return 0;
}
}
if ((r.source.min_width > width) ||
(r.source.min_height > height) ||
(r.source.max_width < width) || (r.source.max_height < height)) {
fprintf (stderr, "GetOverlayBitmap failed bounds tests\n");
delete bbitmap;
return 0;
}
if ((width_padding != 0) || (height_padding != 0)) {
delete bbitmap;
bounds.Set (bounds.left, bounds.top,
bounds.right + width_padding,
bounds.bottom + height_padding);
bbitmap = new BBitmap (bounds, B_BITMAP_WILL_OVERLAY, cs);
if (!bbitmap || bbitmap->InitCheck () != B_OK) {
fprintf (stderr, "GetOverlayBitmap failed late\n");
delete bbitmap;
return 0;
}
}
return bbitmap;
}
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// See <GraphicsDefs.h> [btw: Cb=U, Cr=V]
// See also http://www.fourcc.org/indexyuv.htm
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enum color_space convert_color_space (Uint32 format)
{
switch (format) {
case SDL_YV12_OVERLAY:
return B_YUV9;
case SDL_IYUV_OVERLAY:
return B_YUV12;
case SDL_YUY2_OVERLAY:
return B_YCbCr422;
case SDL_UYVY_OVERLAY:
return B_YUV422;
case SDL_YVYU_OVERLAY: // not supported on beos?
return B_NO_COLOR_SPACE;
default:
return B_NO_COLOR_SPACE;
}
}
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// See SDL_video.h
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int count_planes (Uint32 format)
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switch (format) {
case SDL_YV12_OVERLAY:
case SDL_IYUV_OVERLAY:
return 3;
case SDL_YUY2_OVERLAY:
case SDL_UYVY_OVERLAY:
case SDL_YVYU_OVERLAY:
return 1;
default:
return 0;
}
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SDL_Overlay *BE_CreateYUVOverlay (_THIS, int width, int height,
Uint32 format, SDL_Surface * display)
{
SDL_Overlay *overlay;
struct private_yuvhwdata *hwdata;
BBitmap *bbitmap;
int planes;
BRect bounds;
color_space cs;
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/* find the appropriate BeOS colorspace descriptor */
cs = convert_color_space (format);
if (cs == B_NO_COLOR_SPACE) {
return NULL;
}
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/* count planes */
planes = count_planes (format);
if (planes == 0) {
return NULL;
}
/* TODO: figure out planar modes, if anyone cares */
if (planes == 3) {
return NULL;
}
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/* Create the overlay structure */
overlay = (SDL_Overlay *) SDL_calloc (1, sizeof (SDL_Overlay));
if (overlay == NULL) {
SDL_OutOfMemory ();
return NULL;
}
/* Fill in the basic members */
overlay->format = format;
overlay->w = width;
overlay->h = height;
overlay->hwdata = NULL;
/* Set up the YUV surface function structure */
overlay->hwfuncs = &be_yuvfuncs;
/* Create the pixel data and lookup tables */
hwdata =
(struct private_yuvhwdata *) SDL_calloc (1,
sizeof (struct
private_yuvhwdata));
if (hwdata == NULL) {
SDL_OutOfMemory ();
SDL_FreeYUVOverlay (overlay);
return NULL;
}
overlay->hwdata = hwdata;
overlay->hwdata->display = display;
overlay->hwdata->bview = NULL;
overlay->hwdata->bbitmap = NULL;
overlay->hwdata->locked = 0;
/* Create the BBitmap framebuffer */
bounds.top = 0;
bounds.left = 0;
bounds.right = width - 1;
bounds.bottom = height - 1;
BView *bview =
new BView (bounds, "overlay", B_FOLLOW_NONE, B_WILL_DRAW);
if (!bview) {
SDL_OutOfMemory ();
SDL_FreeYUVOverlay (overlay);
return NULL;
}
overlay->hwdata->bview = bview;
overlay->hwdata->first_display = true;
bview->Hide ();
bbitmap = BE_GetOverlayBitmap (bounds, cs);
if (!bbitmap) {
overlay->hwdata->bbitmap = NULL;
SDL_FreeYUVOverlay (overlay);
return NULL;
}
overlay->hwdata->bbitmap = bbitmap;
overlay->planes = planes;
overlay->pitches =
(Uint16 *) SDL_calloc (overlay->planes, sizeof (Uint16));
overlay->pixels =
(Uint8 **) SDL_calloc (overlay->planes, sizeof (Uint8 *));
if (!overlay->pitches || !overlay->pixels) {
SDL_OutOfMemory ();
SDL_FreeYUVOverlay (overlay);
return (NULL);
}
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overlay->pitches[0] = bbitmap->BytesPerRow ();
overlay->pixels[0] = (Uint8 *) bbitmap->Bits ();
overlay->hw_overlay = 1;
if (SDL_Win->LockWithTimeout (1000000) != B_OK) {
SDL_FreeYUVOverlay (overlay);
return (NULL);
}
BView *view = SDL_Win->View ();
view->AddChild (bview);
rgb_color key;
bview->SetViewOverlay (bbitmap, bounds, bview->Bounds (), &key,
B_FOLLOW_ALL,
B_OVERLAY_FILTER_HORIZONTAL |
B_OVERLAY_FILTER_VERTICAL);
bview->SetViewColor (key);
bview->Flush ();
SDL_Win->Unlock ();
current_overlay = overlay;
return overlay;
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int BE_LockYUVOverlay (_THIS, SDL_Overlay * overlay)
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if (overlay == NULL) {
return 0;
}
overlay->hwdata->locked = 1;
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return 0;
}
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void BE_UnlockYUVOverlay (_THIS, SDL_Overlay * overlay)
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if (overlay == NULL) {
return;
}
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overlay->hwdata->locked = 0;
}
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int BE_DisplayYUVOverlay (_THIS, SDL_Overlay * overlay, SDL_Rect * src,
SDL_Rect * dst)
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if ((overlay == NULL) || (overlay->hwdata == NULL)
|| (overlay->hwdata->bview == NULL) || (SDL_Win->View () == NULL)) {
return -1;
}
if (SDL_Win->LockWithTimeout (50000) != B_OK) {
return 0;
}
BView *bview = overlay->hwdata->bview;
if (SDL_Win->IsFullScreen ()) {
int left, top;
SDL_Win->GetXYOffset (left, top);
bview->MoveTo (left + dst->x, top + dst->y);
} else {
bview->MoveTo (dst->x, dst->y);
}
bview->ResizeTo (dst->w, dst->h);
bview->Flush ();
if (overlay->hwdata->first_display) {
bview->Show ();
overlay->hwdata->first_display = false;
}
SDL_Win->Unlock ();
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return 0;
}
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void BE_FreeYUVOverlay (_THIS, SDL_Overlay * overlay)
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if (overlay == NULL) {
return;
}
if (overlay->hwdata == NULL) {
return;
}
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current_overlay = NULL;
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delete overlay->hwdata->bbitmap;
SDL_free (overlay->hwdata);
}
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}; // extern "C"
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/* vi: set ts=4 sw=4 expandtab: */