Remove win32/qt/xanim/real binary codecs loading

Remove the win32 loader - the win32 emulation layer, as well as the
code for using DirectShow/DMO/VFW codecs. Remove loading of xanim,
QuickTime, and RealMedia codecs.

The win32 emulation layer is based on a very old version of wine.
Apparently, wine code was copied and hacked until it was somehow able
to load a limited collection of binary codecs. It poked around in the
code segment of some known binary codecs to disable unsupported win32
API calls to make them work. Example from module.c:

    for (i=0;i<5;i++)  RVA(0x19e842)[i]=0x90; // make_new_region ?
    for (i=0;i<28;i++) RVA(0x19e86d)[i]=0x90; // call__call_CreateCompatibleDC ?
    for (i=0;i<5;i++)  RVA(0x19e898)[i]=0x90; // jmp_to_call_loadbitmap ?
    for (i=0;i<9;i++)  RVA(0x19e8ac)[i]=0x90; // call__calls_OLE_shit ?
    for (i=0;i<106;i++) RVA(0x261b10)[i]=0x90; // disable threads

Just to show how utterly insane this code is. You wouldn't want even
your worst enemy to have to maintain this. In fact, it seems nobody
made major changes to this code ever since it was committed.

Most formats can be decoded by libavcodecs these days, and the loader
couldn't be used on 64 bit platforms anyway. The same is (probably)
true for the other binary codecs.

General note about how support for win32 codecs could be added back:

It's not possible to replace the win32 loader code by using wine as
library, because modern wine can not be linked with native Linux
programs for certain reasons. It would be possible to to move DirectShow
video decoding into a separate process linked with wine, like the
CoreAVC-for-Linux patches do. There is also the mplayer-ww fork, which
uses the dshownative library to use DirectShow codecs on Windows.

1 files changed, 0 insertions, 275 deletions

diff --git a/loader/ldt_keeper.c b/loader/ldt_keeper.c
deleted file mode 100644
index a5ae1d6b9a..0000000000
--- a/loader/ldt_keeper.c
+++ /dev/null
@@ -1,275 +0,0 @@
-/**
- * !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
- * This file MUST be in main library because LDT must
- * be modified before program creates first thread
- * - avifile includes this file from C++ code
- * and initializes it at the start of player!
- * it might sound like a hack and it really is - but
- * as aviplay is deconding video with more than just one
- * thread currently it's necessary to do it this way
- * this might change in the future
- */
-
-/* applied some modification to make make our xine friend more happy */
-
-/*
- * Modified for use with MPlayer, detailed changelog at
- * http://svn.mplayerhq.hu/mplayer/trunk/
- */
-
-#include "config.h"
-#include "ldt_keeper.h"
-
-#include <string.h>
-#include <stdlib.h>
-#include <errno.h>
-#include <fcntl.h>
-#ifdef HAVE_SYS_MMAN_H
-#include <sys/mman.h>
-#else
-#include "osdep/mmap.h"
-#endif
-#include <sys/types.h>
-#include <stdio.h>
-#include <unistd.h>
-#include "osdep/mmap_anon.h"
-#include "mp_msg.h"
-#ifdef __linux__
-#include <asm/unistd.h>
-#include <asm/ldt.h>
-// 2.5.xx+ calls this user_desc:
-#include <linux/version.h>
-#if LINUX_VERSION_CODE >= KERNEL_VERSION(2,5,47)
-#define modify_ldt_ldt_s user_desc
-#endif
-/// declare modify_ldt with the _syscall3 macro for older glibcs
-#if defined(__GLIBC__) &&  (__GLIBC__ < 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ == 0))
-_syscall3( int, modify_ldt, int, func, void *, ptr, unsigned long, bytecount );
-#else
-int modify_ldt(int func, void *ptr, unsigned long bytecount);
-#endif
-#else
-#if defined(__NetBSD__) || defined(__FreeBSD__) || defined(__OpenBSD__) || defined(__DragonFly__)
-#include <machine/segments.h>
-#include <machine/sysarch.h>
-#elif defined(__APPLE__)
-#include <architecture/i386/table.h>
-#include <i386/user_ldt.h>
-#elif defined(__svr4__)
-#include <sys/segment.h>
-#include <sys/sysi86.h>
-
-/* solaris x86: add missing prototype for sysi86(), but only when sysi86(int, void*) is known to be valid */
-#ifdef HAVE_SYSI86_iv
-int sysi86(int, void*);
-#endif
-
-#ifndef NUMSYSLDTS             /* SunOS 2.5.1 does not define NUMSYSLDTS */
-#define NUMSYSLDTS     6       /* Let's hope the SunOS 5.8 value is OK */
-#endif
-
-#define       TEB_SEL_IDX     NUMSYSLDTS
-#endif
-
-#define LDT_ENTRIES     8192
-#define LDT_ENTRY_SIZE  8
-#pragma pack(4)
-struct modify_ldt_ldt_s {
-        unsigned int  entry_number;
-        unsigned long base_addr;
-        unsigned int  limit;
-        unsigned int  seg_32bit:1;
-        unsigned int  contents:2;
-        unsigned int  read_exec_only:1;
-        unsigned int  limit_in_pages:1;
-        unsigned int  seg_not_present:1;
-        unsigned int  useable:1;
-};
-
-#define MODIFY_LDT_CONTENTS_DATA        0
-#define MODIFY_LDT_CONTENTS_STACK       1
-#define MODIFY_LDT_CONTENTS_CODE        2
-#endif
-
-
-/* user level (privilege level: 3) ldt (1<<2) segment selector */
-#define       LDT_SEL(idx) ((idx) << 3 | 1 << 2 | 3)
-
-/* i got this value from wine sources, it's the first free LDT entry */
-#if (defined(__APPLE__) || defined(__FreeBSD__)) && defined(LDT_AUTO_ALLOC)
-#define       TEB_SEL_IDX     LDT_AUTO_ALLOC
-#define	      USE_LDT_AA
-#endif
-
-#ifndef       TEB_SEL_IDX
-#define       TEB_SEL_IDX     17
-#endif
-
-static unsigned int fs_ldt = TEB_SEL_IDX;
-
-
-/**
- * here is a small logical problem with Restore for multithreaded programs -
- * in C++ we use static class for this...
- */
-
-void Setup_FS_Segment(void)
-{
-    unsigned int ldt_desc = LDT_SEL(fs_ldt);
-
-    __asm__ volatile(
-	"movl %0,%%eax; movw %%ax, %%fs" : : "r" (ldt_desc)
-	:"eax"
-    );
-}
-
-/* we don't need this - use modify_ldt instead */
-#if 0
-#ifdef __linux__
-/* XXX: why is this routine from libc redefined here? */
-/* NOTE: the redefined version ignores the count param, count is hardcoded as 16 */
-static int LDT_Modify( int func, struct modify_ldt_ldt_s *ptr,
-		       unsigned long count )
-{
-    int res;
-#ifdef __PIC__
-    __asm__ volatile( "pushl %%ebx\n\t"
-			  "movl %2,%%ebx\n\t"
-			  "int $0x80\n\t"
-			  "popl %%ebx"
-			  : "=a" (res)
-			  : "0" (__NR_modify_ldt),
-			  "r" (func),
-			  "c" (ptr),
-			  "d"(16)//sizeof(*ptr) from kernel point of view
-			  :"esi"     );
-#else
-    __asm__ volatile("int $0x80"
-			 : "=a" (res)
-			 : "0" (__NR_modify_ldt),
-			 "b" (func),
-			 "c" (ptr),
-			 "d"(16)
-			 :"esi");
-#endif  /* __PIC__ */
-    if (res >= 0) return res;
-    errno = -res;
-    return -1;
-}
-#endif
-#endif
-
-#if defined(__NetBSD__) || defined(__FreeBSD__) || defined(__OpenBSD__) || defined(__DragonFly__) || defined(__APPLE__)
-static void LDT_EntryToBytes( unsigned long *buffer, const struct modify_ldt_ldt_s *content )
-{
-    *buffer++ = ((content->base_addr & 0x0000ffff) << 16) |
-	(content->limit & 0x0ffff);
-    *buffer = (content->base_addr & 0xff000000) |
-	((content->base_addr & 0x00ff0000)>>16) |
-	(content->limit & 0xf0000) |
-	(content->contents << 10) |
-	((content->read_exec_only == 0) << 9) |
-	((content->seg_32bit != 0) << 22) |
-	((content->limit_in_pages != 0) << 23) |
-	0xf000;
-}
-#endif
-
-void* fs_seg=0;
-
-ldt_fs_t* Setup_LDT_Keeper(void)
-{
-    struct modify_ldt_ldt_s array;
-    int ret;
-    ldt_fs_t* ldt_fs = malloc(sizeof(ldt_fs_t));
-
-    if (!ldt_fs)
-	return NULL;
-
-#ifdef __APPLE__
-    if (getenv("DYLD_BIND_AT_LAUNCH") == NULL)
-        mp_tmsg(MSGT_LOADER, MSGL_WARN, "WARNING: Attempting to use DLL codecs but environment variable\n         DYLD_BIND_AT_LAUNCH not set. This will likely crash.\n");
-#endif /* __APPLE__ */
-
-    fs_seg=
-    ldt_fs->fs_seg = mmap_anon(NULL, getpagesize(), PROT_READ | PROT_WRITE, MAP_PRIVATE, 0);
-    if (ldt_fs->fs_seg == (void*)-1)
-    {
-	perror("ERROR: Couldn't allocate memory for fs segment");
-        free(ldt_fs);
-	return NULL;
-    }
-    *(void**)((char*)ldt_fs->fs_seg+0x18) = ldt_fs->fs_seg;
-    memset(&array, 0, sizeof(array));
-    array.base_addr=(int)ldt_fs->fs_seg;
-    array.entry_number=TEB_SEL_IDX;
-    array.limit=array.base_addr+getpagesize()-1;
-    array.seg_32bit=1;
-    array.read_exec_only=0;
-    array.seg_not_present=0;
-    array.contents=MODIFY_LDT_CONTENTS_DATA;
-    array.limit_in_pages=0;
-#ifdef __linux__
-    //ret=LDT_Modify(0x1, &array, sizeof(struct modify_ldt_ldt_s));
-    ret=modify_ldt(0x1, &array, sizeof(struct modify_ldt_ldt_s));
-    if(ret<0)
-    {
-	perror("install_fs");
-	printf("Couldn't install fs segment, expect segfault\n");
-    }
-#elif defined(__NetBSD__) || defined(__FreeBSD__) || defined(__OpenBSD__) || defined(__DragonFly__) || defined(__APPLE__)
-    {
-        unsigned long d[2];
-
-        LDT_EntryToBytes( d, &array );
-#ifdef USE_LDT_AA
-        ret = i386_set_ldt(LDT_AUTO_ALLOC, (union descriptor *)d, 1);
-        array.entry_number = ret;
-        fs_ldt = ret;
-#else
-        ret = i386_set_ldt(array.entry_number, (union descriptor *)d, 1);
-#endif
-        if (ret < 0)
-        {
-            perror("install_fs");
-	    printf("Couldn't install fs segment, expect segfault\n");
-            printf("Did you reconfigure the kernel with \"options USER_LDT\"?\n");
-#ifdef __OpenBSD__
-	    printf("On newer OpenBSD systems did you set machdep.userldt to 1?\n");
-#endif
-        }
-    }
-#elif defined(__svr4__)
-    {
-	struct ssd ssd;
-	ssd.sel = LDT_SEL(TEB_SEL_IDX);
-	ssd.bo = array.base_addr;
-	ssd.ls = array.limit - array.base_addr;
-	ssd.acc1 = ((array.read_exec_only == 0) << 1) |
-	    (array.contents << 2) |
-	    0xf0;   /* P(resent) | DPL3 | S */
-	ssd.acc2 = 0x4;   /* byte limit, 32-bit segment */
-	if (sysi86(SI86DSCR, &ssd) < 0) {
-	    perror("sysi86(SI86DSCR)");
-	    printf("Couldn't install fs segment, expect segfault\n");
-	}
-    }
-#endif
-
-    Setup_FS_Segment();
-
-    ldt_fs->prev_struct = malloc(8);
-    *(void**)array.base_addr = ldt_fs->prev_struct;
-
-    return ldt_fs;
-}
-
-void Restore_LDT_Keeper(ldt_fs_t* ldt_fs)
-{
-    if (ldt_fs == NULL || ldt_fs->fs_seg == 0)
-	return;
-    free(ldt_fs->prev_struct);
-    munmap((char*)ldt_fs->fs_seg, getpagesize());
-    ldt_fs->fs_seg = 0;
-    free(ldt_fs);
-}