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, 453 deletions

diff --git a/libmpcodecs/vd_realvid.c b/libmpcodecs/vd_realvid.c
deleted file mode 100644
index 08637b1407..0000000000
--- a/libmpcodecs/vd_realvid.c
+++ /dev/null
@@ -1,453 +0,0 @@
-/*
- * This file is part of MPlayer.
- *
- * MPlayer is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * MPlayer 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 General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License along
- * with MPlayer; if not, write to the Free Software Foundation, Inc.,
- * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
- */
-
-#include <stdio.h>
-#include <stdlib.h>
-
-#include <libavutil/intreadwrite.h>
-
-#include "config.h"
-
-#ifdef HAVE_LIBDL
-#include <dlfcn.h>
-#endif
-
-#include "mp_msg.h"
-#include "path.h"
-
-#include "vd_internal.h"
-#include "loader/wine/windef.h"
-
-static const vd_info_t info = {
-	"RealVideo decoder",
-	"realvid",
-	"Alex Beregszaszi",
-	"Florian Schneider, Arpad Gereoffy, Alex Beregszaszi, Donnie Smith",
-	"binary real video codecs"
-};
-
-LIBVD_EXTERN(realvid)
-
-
-/*
- * Structures for data packets.  These used to be tables of unsigned ints, but
- * that does not work on 64 bit platforms (e.g. Alpha).  The entries that are
- * pointers get truncated.  Pointers on 64 bit platforms are 8 byte longs.
- * So we have to use structures so the compiler will assign the proper space
- * for the pointer.
- */
-typedef struct cmsg_data_s {
-	uint32_t data1;
-	uint32_t data2;
-	uint32_t* dimensions;
-} cmsg_data_t;
-
-typedef struct transform_in_s {
-	uint32_t len;
-	uint32_t unknown1;
-	uint32_t chunks;
-	uint32_t* extra;
-	uint32_t unknown2;
-	uint32_t timestamp;
-} transform_in_t;
-
-static unsigned long (*rvyuv_custom_message)(cmsg_data_t* ,void*);
-static unsigned long (*rvyuv_free)(void*);
-static unsigned long (*rvyuv_init)(void*, void*); // initdata,context
-static unsigned long (*rvyuv_transform)(char*, char*,transform_in_t*,unsigned int*,void*);
-#ifdef CONFIG_WIN32DLL
-static unsigned long WINAPI (*wrvyuv_custom_message)(cmsg_data_t* ,void*);
-static unsigned long WINAPI (*wrvyuv_free)(void*);
-static unsigned long WINAPI (*wrvyuv_init)(void*, void*); // initdata,context
-static unsigned long WINAPI (*wrvyuv_transform)(char*, char*,transform_in_t*,unsigned int*,void*);
-#endif
-
-static void *rv_handle=NULL;
-static int initialized=0;
-static uint8_t *buffer = NULL;
-static int bufsz = 0;
-#ifdef CONFIG_WIN32DLL
-static int dll_type = 0; /* 0 = unix dlopen, 1 = win32 dll */
-#endif
-
-void *__builtin_vec_new(unsigned long size);
-void __builtin_vec_delete(void *mem);
-void __pure_virtual(void);
-
-void *__builtin_vec_new(unsigned long size) {
-	return malloc(size);
-}
-
-void __builtin_vec_delete(void *mem) {
-	free(mem);
-}
-
-void __pure_virtual(void) {
-	printf("FATAL: __pure_virtual() called!\n");
-//	exit(1);
-}
-
-#if defined(__FreeBSD__) || defined(__NetBSD__) || defined(__OpenBSD__) || defined(__DragonFly__)
-void ___brk_addr(void) {exit(0);}
-char **__environ={NULL};
-#undef stderr
-FILE *stderr=NULL;
-#endif
-
-// to set/get/query special features/parameters
-static int control(sh_video_t *sh,int cmd,void* arg,...){
-//    switch(cmd){
-//    case VDCTRL_QUERY_MAX_PP_LEVEL:
-//	return 9;
-//    case VDCTRL_SET_PP_LEVEL:
-//	vfw_set_postproc(sh,10*(*((int*)arg)));
-//	return CONTROL_OK;
-//    }
-    return CONTROL_UNKNOWN;
-}
-
-/* exits program when failure */
-#ifdef HAVE_LIBDL
-static int load_syms_linux(char *path) {
-		void *handle;
-
-		mp_msg(MSGT_DECVIDEO,MSGL_V, "opening shared obj '%s'\n", path);
-		handle = dlopen (path, RTLD_LAZY);
-		if (!handle) {
-			mp_msg(MSGT_DECVIDEO,MSGL_WARN,"Error: %s\n",dlerror());
-			return 0;
-		}
-
-		rvyuv_custom_message = dlsym(handle, "RV20toYUV420CustomMessage");
-		rvyuv_free = dlsym(handle, "RV20toYUV420Free");
-		rvyuv_init = dlsym(handle, "RV20toYUV420Init");
-		rvyuv_transform = dlsym(handle, "RV20toYUV420Transform");
-
-    if(rvyuv_custom_message &&
-       rvyuv_free &&
-       rvyuv_init &&
-       rvyuv_transform)
-    {
-	rv_handle = handle;
-	return 1;
-    }
-
-		rvyuv_custom_message = dlsym(handle, "RV40toYUV420CustomMessage");
-		rvyuv_free = dlsym(handle, "RV40toYUV420Free");
-		rvyuv_init = dlsym(handle, "RV40toYUV420Init");
-		rvyuv_transform = dlsym(handle, "RV40toYUV420Transform");
-
-    if(rvyuv_custom_message &&
-       rvyuv_free &&
-       rvyuv_init &&
-       rvyuv_transform)
-    {
-	rv_handle = handle;
-	return 1;
-    }
-
-    mp_msg(MSGT_DECVIDEO,MSGL_WARN,"Error resolving symbols! (version incompatibility?)\n");
-    dlclose(handle);
-    return 0;
-}
-#endif
-
-#ifdef CONFIG_WIN32DLL
-
-#ifdef WIN32_LOADER
-#include "loader/ldt_keeper.h"
-#endif
-void* WINAPI LoadLibraryA(char* name);
-void* WINAPI GetProcAddress(void* handle,char* func);
-int WINAPI FreeLibrary(void *handle);
-
-#ifndef WIN32_LOADER
-void * WINAPI GetModuleHandleA(char *);
-static int patch_dll(uint8_t *patchpos, const uint8_t *oldcode,
-                     const uint8_t *newcode, int codesize) {
-  void *handle = GetModuleHandleA("kernel32");
-  int WINAPI (*VirtProt)(void *, unsigned, int, int *);
-  int res = 0;
-  int prot, tmp;
-  VirtProt = GetProcAddress(handle, "VirtualProtect");
-  // change permissions to PAGE_WRITECOPY
-  if (!VirtProt ||
-      !VirtProt(patchpos, codesize, 0x08, &prot)) {
-    mp_msg(MSGT_DECVIDEO, MSGL_WARN, "VirtualProtect failed at %p\n", patchpos);
-    return 0;
-  }
-  if (memcmp(patchpos, oldcode, codesize) == 0) {
-    memcpy(patchpos, newcode, codesize);
-    res = 1;
-  }
-  VirtProt(patchpos, codesize, prot, &tmp);
-  return res;
-}
-#endif
-
-static int load_syms_windows(char *path) {
-    void *handle;
-
-    mp_msg(MSGT_DECVIDEO,MSGL_V, "opening win32 dll '%s'\n", path);
-#ifdef WIN32_LOADER
-    Setup_LDT_Keeper();
-#endif
-    handle = LoadLibraryA(path);
-    mp_msg(MSGT_DECVIDEO,MSGL_V,"win32 real codec handle=%p  \n",handle);
-    if (!handle) {
-	mp_msg(MSGT_DECVIDEO,MSGL_WARN,"Error loading dll\n");
-	return 0;
-    }
-
-    wrvyuv_custom_message = GetProcAddress(handle, "RV20toYUV420CustomMessage");
-    wrvyuv_free = GetProcAddress(handle, "RV20toYUV420Free");
-    wrvyuv_init = GetProcAddress(handle, "RV20toYUV420Init");
-    wrvyuv_transform = GetProcAddress(handle, "RV20toYUV420Transform");
-
-    if(wrvyuv_custom_message &&
-       wrvyuv_free &&
-       wrvyuv_init &&
-       wrvyuv_transform)
-    {
-	dll_type = 1;
-	rv_handle = handle;
-#ifndef WIN32_LOADER
-	{
-	    if (strstr(path, "drv43260.dll")) {
-		int patched;
-		// patch away multithreaded decoding, it causes crashes
-		static const uint8_t oldcode[13] = {
-		    0x83, 0xbb, 0xf8, 0x05, 0x00, 0x00, 0x01,
-		    0x0f, 0x86, 0xd0, 0x00, 0x00, 0x00 };
-		static const uint8_t newcode[13] = {
-		    0x31, 0xc0,
-		    0x89, 0x83, 0xf8, 0x05, 0x00, 0x00,
-		    0xe9, 0xd0, 0x00, 0x00, 0x00 };
-		patched = patch_dll(
-			(char*)wrvyuv_transform + 0x634132fa - 0x634114d0,
-			oldcode, newcode, sizeof(oldcode));
-		if (!patched)
-		    mp_msg(MSGT_DECVIDEO, MSGL_WARN, "Could not patch Real codec, this might crash on multi-CPU systems\n");
-	    }
-	}
-#endif
-	return 1;
-    }
-
-    wrvyuv_custom_message = GetProcAddress(handle, "RV40toYUV420CustomMessage");
-    wrvyuv_free = GetProcAddress(handle, "RV40toYUV420Free");
-    wrvyuv_init = GetProcAddress(handle, "RV40toYUV420Init");
-    wrvyuv_transform = GetProcAddress(handle, "RV40toYUV420Transform");
-    if(wrvyuv_custom_message &&
-       wrvyuv_free &&
-       wrvyuv_init &&
-       wrvyuv_transform) {
-	dll_type = 1;
-	rv_handle = handle;
-	return 1;
-    }
-
-    mp_msg(MSGT_DECVIDEO,MSGL_WARN,"Error resolving symbols! (version incompatibility?)\n");
-    FreeLibrary(handle);
-    return 0; // error
-}
-#endif
-
-/* we need exact positions */
-struct rv_init_t {
-	short unk1;
-	short w;
-	short h;
-	short unk3;
-	int unk2;
-	int subformat;
-	int unk5;
-	int format;
-} rv_init_t;
-
-// init driver
-static int init(sh_video_t *sh){
-	//unsigned int out_fmt;
-	char *path;
-	int result;
-	// we export codec id and sub-id from demuxer in bitmapinfohdr:
-	unsigned char* extrahdr=(unsigned char*)(sh->bih+1);
-	unsigned int extrahdr_size = sh->bih->biSize - sizeof(*sh->bih);
-	struct rv_init_t init_data;
-
-	if(extrahdr_size < 8) {
-	    mp_msg(MSGT_DECVIDEO,MSGL_ERR,"realvideo: extradata too small (%u)\n", extrahdr_size);
-	    return 0;
-	}
-	init_data = (struct rv_init_t){11, sh->disp_w, sh->disp_h, 0, 0, AV_RB32(extrahdr), 1, AV_RB32(extrahdr + 4)}; // rv30
-
-	mp_msg(MSGT_DECVIDEO,MSGL_V,"realvideo codec id: 0x%08X  sub-id: 0x%08X\n",init_data.format,init_data.subformat);
-
-	path = malloc(strlen(codec_path) + strlen(sh->codec->dll) + 2);
-	if (!path) return 0;
-	sprintf(path, "%s/%s", codec_path, sh->codec->dll);
-
-	/* first try to load linux dlls, if failed and we're supporting win32 dlls,
-	   then try to load the windows ones */
-#ifdef HAVE_LIBDL
-	if(strstr(sh->codec->dll,".dll") || !load_syms_linux(path))
-#endif
-#ifdef CONFIG_WIN32DLL
-	    if (!load_syms_windows(sh->codec->dll))
-#endif
-	{
-		mp_tmsg(MSGT_DECVIDEO,MSGL_ERR,"ERROR: Could not open required DirectShow codec %s.\n",sh->codec->dll);
-		mp_msg(MSGT_DECVIDEO,MSGL_HINT,"Read the RealVideo section of the DOCS!\n");
-		free(path);
-		return 0;
-	}
-	free(path);
-	// only I420 supported
-//	if((sh->format!=0x30335652) && !mpcodecs_config_vo(sh,sh->disp_w,sh->disp_h,IMGFMT_I420)) return 0;
-	// init codec:
-	sh->context=NULL;
-#ifdef CONFIG_WIN32DLL
-	if (dll_type == 1)
-	    result=(*wrvyuv_init)(&init_data, &sh->context);
-	else
-#endif
-	result=(*rvyuv_init)(&init_data, &sh->context);
-	if (result){
-	    mp_msg(MSGT_DECVIDEO,MSGL_ERR,"Couldn't open RealVideo codec, error code: 0x%X  \n",result);
-	    return 0;
-	}
-	// setup rv30 codec (codec sub-type and image dimensions):
-	if((sh->format<=0x30335652) && AV_RB32(extrahdr + 4)>=0x20200002){
-	    int i, cmsg_cnt;
-	    uint32_t cmsg24[16]={sh->disp_w,sh->disp_h};
-	    cmsg_data_t cmsg_data={0x24,1+(extrahdr[1]&7), &cmsg24[0]};
-
-	    mp_msg(MSGT_DECVIDEO,MSGL_V,"realvideo: using cmsg24 with %u elements.\n",extrahdr[1]&7);
-	    cmsg_cnt = (extrahdr[1]&7)*2;
-	    if (extrahdr_size-8 < cmsg_cnt) {
-	        mp_msg(MSGT_DECVIDEO,MSGL_WARN,"realvideo: not enough extradata (%u) to make %u cmsg24 elements.\n",extrahdr_size-8,extrahdr[1]&7);
-	        cmsg_cnt = extrahdr_size-8;
-	    }
-	    for (i = 0; i < cmsg_cnt; i++)
-	        cmsg24[2+i] = extrahdr[8+i]*4;
-	    if (extrahdr_size-8 > cmsg_cnt)
-	        mp_msg(MSGT_DECVIDEO,MSGL_WARN,"realvideo: %u bytes of unknown extradata remaining.\n",extrahdr_size-8-cmsg_cnt);
-
-#ifdef CONFIG_WIN32DLL
-	    if (dll_type == 1)
-		(*wrvyuv_custom_message)(&cmsg_data,sh->context);
-	    else
-#endif
-	    (*rvyuv_custom_message)(&cmsg_data,sh->context);
-	}
-	mp_msg(MSGT_DECVIDEO,MSGL_V,"INFO: RealVideo codec init OK!\n");
-	return 1;
-}
-
-// uninit driver
-static void uninit(sh_video_t *sh){
-#ifdef CONFIG_WIN32DLL
-	if (dll_type == 1)
-	{
-	    if (wrvyuv_free) wrvyuv_free(sh->context);
-	} else
-#endif
-	if(rvyuv_free) rvyuv_free(sh->context);
-
-#ifdef CONFIG_WIN32DLL
-	if (dll_type == 1)
-	{
-	    if (rv_handle) FreeLibrary(rv_handle);
-	} else
-#endif
-#ifdef HAVE_LIBDL
-	if(rv_handle) dlclose(rv_handle);
-#endif
-	rv_handle=NULL;
-	initialized = 0;
-	free(buffer);
-	buffer = NULL;
-	bufsz = 0;
-}
-
-// decode a frame
-static mp_image_t* decode(sh_video_t *sh,void* data,int len,int flags){
-	mp_image_t* mpi;
-	unsigned long result;
-	uint8_t *buf = data;
-	int chunks = *buf++;
-	int extra_size = 8*(chunks+1);
-	uint32_t data_size = len-1-extra_size;
-	unsigned char* dp_data=buf+extra_size;
-	uint32_t* extra=(uint32_t*)buf;
-	int i;
-
-	unsigned int transform_out[5];
-	transform_in_t transform_in={
-		data_size,	// length of the packet (sub-packets appended)
-		0,		// unknown, seems to be unused
-		chunks,	// number of sub-packets - 1
-		extra,		// table of sub-packet offsets
-		0,		// unknown, seems to be unused
-		0,		// timestamp (should be unneded)
-	};
-
-	if(len<=0 || flags&2) return NULL; // skipped frame || hardframedrop
-
-	if (bufsz < sh->disp_w*sh->disp_h*3/2) {
-	    free(buffer);
-	    bufsz = sh->disp_w*sh->disp_h*3/2;
-	    buffer=malloc(bufsz);
-	    if (!buffer) return 0;
-	}
-
-	for (i=0; i<2*(chunks+1); i++)
-		extra[i] = le2me_32(extra[i]);
-
-#ifdef CONFIG_WIN32DLL
-	if (dll_type == 1)
-	    result=(*wrvyuv_transform)(dp_data, buffer, &transform_in,
-		transform_out, sh->context);
-	else
-#endif
-	result=(*rvyuv_transform)(dp_data, buffer, &transform_in,
-		transform_out, sh->context);
-
-	if(!initialized){  // rv30 width/height now known
-	    sh->aspect=(float)sh->disp_w/(float)sh->disp_h;
-	    sh->disp_w=transform_out[3];
-	    sh->disp_h=transform_out[4];
-	    if (!mpcodecs_config_vo(sh,sh->disp_w,sh->disp_h,IMGFMT_I420)) return 0;
-	    initialized=1;
-	}
-	    mpi=mpcodecs_get_image(sh, MP_IMGTYPE_EXPORT, 0 /*MP_IMGFLAG_ACCEPT_STRIDE*/,
-		    sh->disp_w, sh->disp_h);
-	    if(!mpi) return NULL;
-	    mpi->planes[0] = buffer;
-	    mpi->stride[0] = sh->disp_w;
-	    mpi->planes[1] = buffer + sh->disp_w*sh->disp_h;
-	    mpi->stride[1] = sh->disp_w / 2;
-	    mpi->planes[2] = buffer + sh->disp_w*sh->disp_h*5/4;
-	    mpi->stride[2] = sh->disp_w / 2;
-
-	if(transform_out[0] &&
-	   (sh->disp_w != transform_out[3] || sh->disp_h != transform_out[4]))
-	    initialized = 0;
-
-	return result ? NULL : mpi;
-}