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/*
* dvbosd.c: Implementation of the DVB On Screen Display
*
* See the main source file 'vdr.c' for copyright information and
* how to reach the author.
*
* $Id: dvbosd.c 1.24 2004/07/18 10:20:05 kls Exp $
*/
#include "dvbosd.h"
#include <linux/dvb/osd.h>
#include <signal.h>
#include <sys/ioctl.h>
#include <sys/unistd.h>
#include "dvbdevice.h"
#include "tools.h"
// --- cDvbOsd ---------------------------------------------------------------
#define MAXNUMWINDOWS 7 // OSD windows are counted 1...7
#define MAXOSDMEMORY 92000 // number of bytes available to the OSD (depends on firmware version, but there is no way of determining the actual value)
class cDvbOsd : public cOsd {
private:
int osdDev;
bool shown;
void Cmd(OSD_Command cmd, int color = 0, int x0 = 0, int y0 = 0, int x1 = 0, int y1 = 0, const void *data = NULL);
public:
cDvbOsd(int Left, int Top, int OsdDev);
virtual ~cDvbOsd();
virtual eOsdError CanHandleAreas(const tArea *Areas, int NumAreas);
virtual void Flush(void);
};
cDvbOsd::cDvbOsd(int Left, int Top, int OsdDev)
:cOsd(Left, Top)
{
osdDev = OsdDev;
shown = false;
if (osdDev < 0)
esyslog("ERROR: illegal OSD device handle (%d)!", osdDev);
else {
// must clear all windows here to avoid flashing effects - doesn't work if done
// in Flush() only for the windows that are actually used...
for (int i = 0; i < MAXNUMWINDOWS; i++) {
Cmd(OSD_SetWindow, 0, i + 1);
Cmd(OSD_Clear);
}
}
}
cDvbOsd::~cDvbOsd()
{
if (shown) {
cBitmap *Bitmap;
for (int i = 0; (Bitmap = GetBitmap(i)) != NULL; i++) {
Cmd(OSD_SetWindow, 0, i + 1);
Cmd(OSD_Close);
}
}
}
eOsdError cDvbOsd::CanHandleAreas(const tArea *Areas, int NumAreas)
{
eOsdError Result = cOsd::CanHandleAreas(Areas, NumAreas);
if (Result == oeOk) {
if (NumAreas > MAXNUMWINDOWS)
return oeTooManyAreas;
int TotalMemory = 0;
for (int i = 0; i < NumAreas; i++) {
if (Areas[i].bpp != 1 && Areas[i].bpp != 2 && Areas[i].bpp != 4 && Areas[i].bpp != 8)
return oeBppNotSupported;
if ((Areas[i].Width() & (8 / Areas[i].bpp - 1)) != 0)
return oeWrongAlignment;
TotalMemory += Areas[i].Width() * Areas[i].Height() / (8 / Areas[i].bpp);
}
if (TotalMemory > MAXOSDMEMORY)
return oeOutOfMemory;
}
return Result;
}
void cDvbOsd::Cmd(OSD_Command cmd, int color, int x0, int y0, int x1, int y1, const void *data)
{
if (osdDev >= 0) {
osd_cmd_t dc;
dc.cmd = cmd;
dc.color = color;
dc.x0 = x0;
dc.y0 = y0;
dc.x1 = x1;
dc.y1 = y1;
dc.data = (void *)data;
ioctl(osdDev, OSD_SEND_CMD, &dc);
}
}
void cDvbOsd::Flush(void)
{
cBitmap *Bitmap;
for (int i = 0; (Bitmap = GetBitmap(i)) != NULL; i++) {
Cmd(OSD_SetWindow, 0, i + 1);
if (!shown)
Cmd(OSD_Open, Bitmap->Bpp(), Left() + Bitmap->X0(), Top() + Bitmap->Y0(), Left() + Bitmap->X0() + Bitmap->Width() - 1, Top() + Bitmap->Y0() + Bitmap->Height() - 1, (void *)1); // initially hidden!
int x1 = 0, y1 = 0, x2 = 0, y2 = 0;
if (Bitmap->Dirty(x1, y1, x2, y2)) {
//TODO Workaround: apparently the bitmap sent to the driver always has to be a multiple
//TODO of 8 bits wide, and (dx * dy) also has to be a multiple of 8.
//TODO Fix driver (should be able to handle any size bitmaps!)
while ((x1 > 0 || x2 < Bitmap->Width() - 1) && ((x2 - x1) & 7) != 7) {
if (x2 < Bitmap->Width() - 1)
x2++;
else if (x1 > 0)
x1--;
}
//TODO "... / 2" <==> Bpp???
while ((y1 > 0 || y2 < Bitmap->Height() - 1) && (((x2 - x1 + 1) * (y2 - y1 + 1) / 2) & 7) != 0) {
if (y2 < Bitmap->Height() - 1)
y2++;
else if (y1 > 0)
y1--;
}
while ((x1 > 0 || x2 < Bitmap->Width() - 1) && (((x2 - x1 + 1) * (y2 - y1 + 1) / 2) & 7) != 0) {
if (x2 < Bitmap->Width() - 1)
x2++;
else if (x1 > 0)
x1--;
}
// commit colors:
int NumColors;
const tColor *Colors = Bitmap->Colors(NumColors);
if (Colors) {
//TODO this should be fixed in the driver!
tColor colors[NumColors];
for (int i = 0; i < NumColors; i++) {
// convert AARRGGBB to AABBGGRR (the driver expects the colors the wrong way):
colors[i] = (Colors[i] & 0xFF000000) | ((Colors[i] & 0x0000FF) << 16) | (Colors[i] & 0x00FF00) | ((Colors[i] & 0xFF0000) >> 16);
#if __BYTE_ORDER == __BIG_ENDIAN
// actually the driver itself should access the bytes according to the current endianness!
colors[i] = ((colors[i] & 0xFF) << 24) | ((colors[i] & 0xFF00) << 8) | ((colors[i] & 0xFF0000) >> 8) | ((colors[i] & 0xFF000000) >> 24);
#endif
}
Colors = colors;
//TODO end of stuff that should be fixed in the driver
Cmd(OSD_SetPalette, 0, NumColors - 1, 0, 0, 0, Colors);
}
// commit modified data:
Cmd(OSD_SetBlock, Bitmap->Width(), x1, y1, x2, y2, Bitmap->Data(x1, y1));
}
Bitmap->Clean();
}
if (!shown) {
// Showing the windows in a separate loop to avoid seeing them come up one after another
for (int i = 0; (Bitmap = GetBitmap(i)) != NULL; i++) {
Cmd(OSD_SetWindow, 0, i + 1);
Cmd(OSD_MoveWindow, 0, Left() + Bitmap->X0(), Top() + Bitmap->Y0());
}
shown = true;
}
}
// --- cDvbOsdProvider -------------------------------------------------------
cDvbOsdProvider::cDvbOsdProvider(int OsdDev)
{
osdDev = OsdDev;
}
cOsd *cDvbOsdProvider::CreateOsd(int Left, int Top)
{
return new cDvbOsd(Left, Top, osdDev);
}
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