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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extern "C" {
/* The functions used to manipulate software video overlays */
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;
}
// See <GraphicsDefs.h> [btw: Cb=U, Cr=V]
// See also http://www.fourcc.org/indexyuv.htm
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;
}
}
// See SDL_video.h
int count_planes(Uint32 format) {
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;
}
}
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;
/* find the appropriate BeOS colorspace descriptor */
cs = convert_color_space(format);
if (cs == B_NO_COLOR_SPACE)
{
return NULL;
}
/* count planes */
planes = count_planes(format);
if (planes == 0)
{
return NULL;
}
/* TODO: figure out planar modes, if anyone cares */
if (planes == 3)
{
return NULL;
}
/* Create the overlay structure */
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overlay = (SDL_Overlay*)SDL_calloc(1, sizeof(SDL_Overlay));
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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 */
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hwdata = (struct private_yuvhwdata*)SDL_calloc(1, sizeof(struct private_yuvhwdata));
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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;
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overlay->pitches = (Uint16*)SDL_calloc(overlay->planes, sizeof(Uint16));
overlay->pixels = (Uint8**)SDL_calloc(overlay->planes, sizeof(Uint8*));
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if (!overlay->pitches || !overlay->pixels)
{
SDL_OutOfMemory();
SDL_FreeYUVOverlay(overlay);
return(NULL);
}
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;
}
int BE_LockYUVOverlay(_THIS, SDL_Overlay* overlay)
{
if (overlay == NULL)
{
return 0;
}
overlay->hwdata->locked = 1;
return 0;
}
void BE_UnlockYUVOverlay(_THIS, SDL_Overlay* overlay)
{
if (overlay == NULL)
{
return;
}
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);
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bview->MoveTo(left+dst->x,top+dst->y);
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} else {
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bview->MoveTo(dst->x,dst->y);
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bview->ResizeTo(dst->w,dst->h);
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bview->Flush();
if (overlay->hwdata->first_display) {
bview->Show();
overlay->hwdata->first_display = false;
}
SDL_Win->Unlock();
return 0;
}
void BE_FreeYUVOverlay(_THIS, SDL_Overlay *overlay)
{
if (overlay == NULL)
{
return;
}
if (overlay->hwdata == NULL)
{
return;
}
current_overlay=NULL;
delete overlay->hwdata->bbitmap;
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SDL_free(overlay->hwdata);
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}
}; // extern "C"