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kas1e
how to detect if overlay is present in few strings ?
Posted on: 2014/4/3 6:34    #1
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I need to detect if overlay is present or not , and in case if yes, return true, in case if not, return false.

That how it done on morphos's mplayer to have fallback if overlay not present (by return -1):

static int preinit(const char *arg)
{
    extern int fullscreen;
    mp_msg(MSGT_VO, MSGL_INFO, "VO: [cgx_overlay] Hello!\n");
    if(!CGXVideoBase)
    {
        if ( ! (CGXVideoBase = (struct Library *) OpenLibrary("cgxvideo.library" , 0L) ) )
        {
            return -1;
        }
    }

    /* common arguments  */
    if (!Cgx_GiveArg(arg))
    {
        CloseLibrary(CGXVideoBase);
        CGXVideoBase = NULL;
        return -1;    
    }

    /* common arguments  */
    if (!Cgx_Overlay_GiveArg(arg))
    {
        Cgx_ReleaseArg();
        CloseLibrary(CGXVideoBase);
        CGXVideoBase = NULL;
        return -1;
    }

    if(!fullscreen)
    {
        ULONG available = FALSE;
        struct Screen *screen = LockPubScreen ( PubScreenName[0] ? PubScreenName : NULL);
        if(screen)
        {
            APTR VLHandle = CreateVLayerHandleTags(screen, VOA_SrcType, SRCFMT_RGB16, VOA_SrcWidth, 320, VOA_SrcHeight, 240, TAG_DONE);

            if(VLHandle)
            {
                available = TRUE;
                DeleteVLayerHandle(VLHandle);
                VLHandle = NULL;
            }

            UnlockPubScreen(NULL,screen);
        }

        if(!available)
        {
            Cgx_ReleaseArg();
            CloseLibrary(CGXVideoBase);
            CGXVideoBase = NULL;
            return -1;
        }
    }

    Cgx_Message();

    return 0;
}


Need same by logic, but just for p96 overlay check. The less by code and cleaner solution will be the better of course
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Hans
Re: how to detect if overlay is present in few strings ?
Posted on: 2014/4/3 8:17    #2
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@kas1e

You basically just try to open an overlay window. Use the P96PIP_ErrorCode tag to get more information about why it failed.

struct Window *pipWindow;
  LONG error = 0;

  pipWindow = p96PIP_OpenTags (P96PIP_SourceFormat, RGBFORMAT,     /* Pixel format of overlay */
                               P96PIP_SourceWidth,  256,           /* Width of overlay surface */
                               P96PIP_SourceHeight, 256,           /* Height of overlay surface */
                               P96PIP_ErrorCode,    (LONG) &error,

                               WA_Title,         "Overlay Window",
                               WA_Activate,      TRUE,
                               WA_RMBTrap,       TRUE,
                               WA_DragBar,       TRUE,
                               WA_DepthGadget,   TRUE,
                               WA_SimpleRefresh, TRUE,
                               WA_SizeGadget,    TRUE,
                               WA_CloseGadget,   TRUE,
                               WA_IDCMP,         IDCMP_CLOSEWINDOW,

                               WA_Width,         400,
                               WA_Height,        400,

                               WA_PubScreenName, "Workbench",
                               TAG_DONE);

  if (pipWindow)
  {
    // Yay, we have overlay!
  }
  else
  {
    switch (error)
    {
      case PIPERR_NOMEMORY:
        printf("PIPERR_NOMEMORY\n");
        break; /* couldn't get normal memory */
      case PIPERR_ATTACHFAIL:
        printf("PIPERR_ATTACHFAIL\n");
        break; /* Failed to attach to a screen */
      case PIPERR_NOTAVAILABLE:
        printf("PIPERR_NOTAVAILABLE\n");
        break; /* PIP not available for other reason   */
      case PIPERR_OUTOFPENS:
        printf("PIPERR_OUTOFPENS\n");
        break; /* couldn't get a free pen for occlusion */
      case PIPERR_BADDIMENSIONS:
        printf("PIPERR_BADDIMENSIONS\n");
        break; /* type, width, height or format invalid */
      case PIPERR_NOWINDOW:
        printf("PIPERR_NOWINDOW\n");
        break; /* couldn't open window */
      case PIPERR_BADALIGNMENT:
        printf("PIPERR_BADALIGNMENT\n");
        break; /* specified alignment is not ok */
      case PIPERR_CROPPED:
        printf("PIPERR_CROPPED\n");
        break;
    }


Hans
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kas1e
Re: how to detect if overlay is present in few strings ?
Posted on: 2014/4/3 8:20    #3
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@Hans
Thanks !
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tboeckel
Re: how to detect if overlay is present in few strings ?
Posted on: 2014/4/3 8:45    #4
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@kas1e

Perhaps you should set WA_Activate to FALSE and WA_Hidden to TRUE to avoid that the window becomes visible and takes away the focus of another active window if the function is just there to check if overlay is possible at all.
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kas1e
Re: how to detect if overlay is present in few strings ?
Posted on: 2014/4/3 9:07    #5
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@Thore
Yep, added

@All
Do test case based on Hans's code and something weird happens. Test case are:

// compile: gcc test.c -lauto

#define __USE_INLINE__ 
#include <stdio.h>
#include <proto/exec.h>
#include <proto/intuition.h>
#include <proto/Picasso96API.h>
#include <libraries/Picasso96.h>

int main()
{
  struct Window *pipWindow; 
  LONG error = 0; 

  if (!(P96Base = OpenLibrary(P96NAME,2)))
  {
     quit();
  }
  
  if (!(IP96 = (struct P96IFace *)GetInterface(P96Base,"main",1,NULL)))
  {
     quit();
  }   

  pipWindow = p96PIP_OpenTags (P96PIP_SourceFormat, RGBFB_YUV422CGX,   /* Pixel format of overlay */ 
                               P96PIP_SourceWidth,  256,           /* Width of overlay surface */ 
                               P96PIP_SourceHeight, 256,           /* Height of overlay surface */ 
                               P96PIP_ErrorCode,    (LONG) &error, 

                               WA_Title,         "Overlay Window", 
                               WA_Activate,      FALSE, 
                               WA_Hidden,        TRUE,
                               
                               WA_Width,         400, 
                               WA_Height,        400, 
                               
                               WA_PubScreenName, "Workbench",
                               
                               TAG_DONE); 

  if (pipWindow) 
  {     
     printf("Yeah, we have overlay!\n");
     CloseWindow(pipWindow);
     quit();
  } 
  
  else 
  { 
    switch (error) 
    { 
      case PIPERR_NOMEMORY: 
        printf("PIPERR_NOMEMORYn"); 
        break; /* couldn't get normal memory */ 
      case PIPERR_ATTACHFAIL: 
        printf("PIPERR_ATTACHFAILn"); 
        break; /* Failed to attach to a screen */ 
      case PIPERR_NOTAVAILABLE: 
        printf("PIPERR_NOTAVAILABLEn"); 
        break; /* PIP not available for other reason   */ 
      case PIPERR_OUTOFPENS: 
        printf("PIPERR_OUTOFPENSn"); 
        break; /* couldn't get a free pen for occlusion */ 
      case PIPERR_BADDIMENSIONS: 
        printf("PIPERR_BADDIMENSIONSn"); 
        break; /* type, width, height or format invalid */ 
      case PIPERR_NOWINDOW: 
        printf("PIPERR_NOWINDOWn"); 
        break; /* couldn't open window */ 
      case PIPERR_BADALIGNMENT: 
        printf("PIPERR_BADALIGNMENTn"); 
        break; /* specified alignment is not ok */ 
      case PIPERR_CROPPED: 
        printf("PIPERR_CROPPEDn"); 
        break; 
    }
  }
  
}


int quit()
{  
  if (P96Base) {
     DropInterface((struct Interface*)IP96);
     CloseLibrary(P96Base);
     P96Base = NULL;  
  }
  
  return 0;
}


Once i run it first time, i have "yeah, we have overlay!", but if i just run it second (or third, or does not matter how many times since first run) i have "PIERR_NOTAVAILABLE". If i reboot, and run it again, then first run all is fine, and all other ones again the same.

Did i miss something obvious there ?
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tboeckel
Re: how to detect if overlay is present in few strings ?
Posted on: 2014/4/3 9:15    #6
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@kas1e

You can one overlay window at most only. Thus you must close the (invisible) window again after a successful check.
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kas1e
Re: how to detect if overlay is present in few strings ?
Posted on: 2014/4/3 9:20    #7
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@Thore
Right :) Just was in hope CloseWindow(pipWindow) will deal with p96_pip one as well. Replaced with p96_Close(pipWindow) and all works now. Thanks for tip!
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