[Mplayer-cvslog] help regarding VESA VBE interface functions.

[Tallapragada, Balakrishna M]

Hi,

Is the following code stub works for linux 32 bit protected mode ?
Especially I am interested in the stub "vbeGetControllerInfo()" as I am
wondering how to do it with VBE interface function 0x4F00 in protected mode.
It looks more like DOS dpmi code.

 

If there is any way I can get access to the code stub please let me know. I
appreciate your help.

 

Thanks,

Mohan

 

 

Atmosfear mplayer-cvslog at mplayerhq.hu 

Fri, 21 Jun 2002 04:20:40 +0200 

 

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----------------------------------------------------------------------------
----

 

Update of /cvsroot/mplayer/main/linux

In directory mail:/var/tmp.root/cvs-serv5649

 

Modified Files:

            vbelib.c 

Log Message:

date: 2002/06/16 09:10:00;  author: nickols_k;  state: Exp;  lines: +17 -13

fixed some DOS-memory leaks

 

patch adopted from mpxp by Tibcu, this fixes vesaout crashes after playing

multiple files.

 

 

Index: vbelib.c

===================================================================

RCS file: /cvsroot/mplayer/main/linux/vbelib.c,v

retrieving revision 1.19

retrieving revision 1.20

diff -u -r1.19 -r1.20

--- vbelib.c         29 Jan 2002 09:57:21 -0000        1.19

+++ vbelib.c      21 Jun 2002 02:20:30 -0000        1.20

@@ -112,12 +112,20 @@

 

 static unsigned hh_int_10_seg;

 static int fd_mem;

+/*

+the list of supported video modes is stored in the reserved portion of

+the SuperVGA information record by some implementations, and it may

+thus be necessary to either copy the mode list or use a different

+buffer for all subsequent VESA calls

+*/

+static void *controller_info;

 int vbeInit( void )

 {

    unsigned short iopl_port;

    size_t i;

    int retval;

    if(!LRMI_init()) return VBE_VM86_FAIL;

+   if(!(controller_info = LRMI_alloc_real(sizeof(struct VbeInfoBlock))))
return VBE_OUT_OF_DOS_MEM;

    /*

     Allow read/write to ALL io ports

    */

@@ -144,6 +152,7 @@

 {

   __set_cursor_type(my_stdout,1);

   close(fd_mem);

+  LRMI_free_real(controller_info);

   return VBE_OK;

 }

 

@@ -216,25 +225,19 @@

 int vbeGetControllerInfo(struct VbeInfoBlock *data)

 {

   struct LRMI_regs r;

-  void *rm_space;

   int retval;

-  if(!(rm_space = LRMI_alloc_real(sizeof(struct VbeInfoBlock)))) return
VBE_OUT_OF_DOS_MEM;

-  memcpy(rm_space,data,sizeof(struct VbeInfoBlock));

+  memcpy(controller_info,data,sizeof(struct VbeInfoBlock));

   memset(&r,0,sizeof(struct LRMI_regs));

   r.eax = 0x4f00;

-  r.es  = VirtToPhysSeg(rm_space);

-  r.edi = VirtToPhysOff(rm_space);

-  if(!VBE_LRMI_int(0x10,&r))

-  {

-     LRMI_free_real(rm_space);

-     return VBE_VM86_FAIL;

-  }

+  r.es  = VirtToPhysSeg(controller_info);

+  r.edi = VirtToPhysOff(controller_info);

+  if(!VBE_LRMI_int(0x10,&r)) return VBE_VM86_FAIL;

   retval = r.eax & 0xffff;

   if(retval == 0x4f)

   {

     FarPtr fpdata;

     retval = VBE_OK;

-    memcpy(data,rm_space,sizeof(struct VbeInfoBlock));

+    memcpy(data,controller_info,sizeof(struct VbeInfoBlock));

     fpdata.seg = (unsigned long)(data->OemStringPtr) >> 16;

     fpdata.off = (unsigned long)(data->OemStringPtr) & 0xffff;

     data->OemStringPtr = PhysToVirt(fpdata);

@@ -325,6 +328,7 @@

     retval = VBE_OK;

     memcpy(data,rm_space,sizeof(struct VesaModeInfoBlock));

   }

+  LRMI_free_real(rm_space);

   return retval;

 }

 

@@ -344,7 +348,7 @@

   r.eax = 0x4f02;

   r.ebx = mode;

   retval = VBE_LRMI_int(0x10,&r);

-  if(rm_space) LRMI_free_real(rm_space);

+  LRMI_free_real(rm_space);

   if(!retval) return VBE_VM86_FAIL;

   retval = r.eax & 0xffff;

   if(retval == 0x4f)

@@ -682,7 +686,7 @@

   memcpy(rm_space,str,r.ecx);

   r.eax = 0x1300;

   retval = VBE_LRMI_int(0x10,&r);

-  if(rm_space) LRMI_free_real(rm_space);

+  LRMI_free_real(rm_space);

   if(!retval) return VBE_VM86_FAIL;

   retval = r.eax & 0xffff;

   if(retval == 0x4f) retval = VBE_OK;

 

 

 

 

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