realvideo.c

VLC Player Source Code

/*****************************************************************************
 * realvideo.c: a realvideo decoder that uses the real's dll
 *****************************************************************************
 * Copyright (C) 2005 the VideoLAN team
 * Copyright (C) 2008 Wang Bo
 *
 * This program 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.
 *
 * This program 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 this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
 *****************************************************************************/

/*****************************************************************************
 * Preamble
 *****************************************************************************/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif

#include <vlc_common.h>
#include <vlc_plugin.h>
#include <vlc_vout.h>
#include <vlc_codec.h>

#ifdef LOADER
/* Need the w32dll loader from mplayer */
#   include <wine/winerror.h>
#   include <ldt_keeper.h>
#   include <wine/windef.h>

void *WINAPI LoadLibraryA( char *name );
void *WINAPI GetProcAddress( void *handle, char *func );
int WINAPI FreeLibrary( void *handle );
#endif

#ifndef WINAPI
#   define WINAPI
#endif

#if defined(HAVE_DL_DLOPEN)
#   if defined(HAVE_DLFCN_H) /* Linux, BSD, Hurd */
#       include <dlfcn.h>
#   endif
#   if defined(HAVE_SYS_DL_H)
#       include <sys/dl.h>
#   endif
#endif

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;

// copypaste from demux_real.c - it should match to get it working!
typedef struct dp_hdr_s
{
    uint32_t chunks;    // number of chunks
    uint32_t timestamp;    // timestamp from packet header
    uint32_t len;    // length of actual data
    uint32_t chunktab;    // offset to chunk offset array
} dp_hdr_t;

/* we need exact positions */
struct rv_init_t
{
    short unk1;
    short w;
    short h;
    short unk3;
    int unk2;
    unsigned int * subformat;
    int unk5;
    unsigned int * format;
} rv_init_t;

struct decoder_sys_t
{
    /* library */
#ifdef LOADER
    ldt_fs_t    *ldt_fs;
#endif
    void        *handle;
    void         *rv_handle;
    int          inited;
    char         *plane;
};

int dll_type = 1;

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 WIN32
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

/*****************************************************************************
 * Module descriptor
 *****************************************************************************/
static int  Open ( vlc_object_t * );
static void Close( vlc_object_t * );

//static int  OpenPacketizer( vlc_object_t * );
static picture_t *DecodeVideo( decoder_t *, block_t ** );

vlc_module_begin();
    set_description( N_("RealVideo library decoder") );
    set_capability( "decoder", 10 );
    set_category( CAT_INPUT );
    set_subcategory( SUBCAT_INPUT_VCODEC );
    set_callbacks( Open, Close );
vlc_module_end();


/*****************************************************************************
 * Local prototypes
 *****************************************************************************/

#ifdef WIN32
static void * load_syms(decoder_t *p_dec, const char *path) 
{
    void *handle;

    msg_Dbg( p_dec, "opening win32 dll '%s'\n", path);
#ifdef LOADER
    Setup_LDT_Keeper();
#endif
    handle = LoadLibraryA(path);
    msg_Dbg( p_dec, "win32 real codec handle=%p  \n",handle);
    if (!handle)
    {
        msg_Err( p_dec, "Error loading dll\n");
        return NULL;
    }

    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;
        return handle;
    }
    msg_Err( p_dec, "Error resolving symbols! (version incompatibility?)\n");
    FreeLibrary(handle);
    return NULL; // error
}
#else
static void * load_syms_linux(decoder_t *p_dec, const char *path) 
{
    void *handle;

    msg_Dbg( p_dec, "opening shared obj '%s'\n", path);

    handle = dlopen (path, RTLD_LAZY);
    if (!handle) 
    {
        msg_Err( p_dec,"Error: %s\n",dlerror());
        return NULL;
    }

    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)
    {
        dll_type = 0;
        return handle;
    }

    msg_Err( p_dec,"Error resolving symbols! (version incompatibility?)\n");
    dlclose(handle);
    return 0;
}
#endif

static int InitVideo(decoder_t *p_dec)
{
    int result;
    struct rv_init_t init_data;
    char fcc[4];
    vlc_mutex_t  *lock;
    char *g_decode_path;

    int  i_vide = p_dec->fmt_in.i_extra;
    unsigned int *p_vide = p_dec->fmt_in.p_extra;
    decoder_sys_t *p_sys = malloc( sizeof( decoder_sys_t ) );
    memset(p_sys,0,sizeof( decoder_sys_t ) );

    if( i_vide < 8 )
    {
            msg_Err( p_dec, "missing extra info" );
            free( p_sys );
            return VLC_EGENERIC;
    }
    if (p_sys->plane) free(p_sys->plane);
    p_sys->plane = malloc (p_dec->fmt_in.video.i_width*p_dec->fmt_in.video.i_height*3/2 + 1024 );
    if (NULL == p_sys->plane)
    {
        msg_Err( p_dec, "cannot alloc plane buffer" );
        free( p_sys );
        return VLC_EGENERIC;
    }

    p_dec->p_sys = p_sys;
    p_dec->pf_decode_video = DecodeVideo;

    memcpy( fcc, &p_dec->fmt_in.i_codec, 4 );
    init_data.unk1 = 11;
    init_data.w = p_dec->fmt_in.video.i_width ;
    init_data.h = p_dec->fmt_in.video.i_height ;
    init_data.unk3 = 0;
    init_data.unk2 = 0;
    init_data.subformat = (unsigned int*)p_vide[0];
    init_data.unk5 = 1;
    init_data.format = (unsigned int*)p_vide[1];

    /* first try to load linux dlls, if failed and we're supporting win32 dlls,
       then try to load the windows ones */
    bool b_so_opened = false;

#ifdef WIN32
    g_decode_path="plugins\\drv43260.dll";

    if( (p_sys->rv_handle = load_syms(p_dec, g_decode_path)) )
        b_so_opened = true;
#else
    static const char psz_paths[] =
    {
        "/usr/lib/win32\0"
        "/usr/lib/codecs\0"
        "/usr/local/RealPlayer8/Codecs\0"
        "/usr/RealPlayer8/Codecs\0"
        "/usr/lib/RealPlayer8/Codecs\0"
        "/opt/RealPlayer8/Codecs\0"
        "/usr/lib/RealPlayer9/users/Real/Codecs\0"
        "/usr/lib/RealPlayer10/codecs\0"
        "/usr/lib/RealPlayer10GOLD/codecs\0"
        "/usr/lib/helix/player/codecs\0"
        "/usr/lib64/RealPlayer8/Codecs\0"
        "/usr/lib64/RealPlayer9/users/Real/Codecs\0"
        "/usr/lib64/RealPlayer10/codecs\0"
        "/usr/lib64/RealPlayer10GOLD/codecs\0"
        "/usr/local/lib/codecs\0"
        "\0"
    };

    for( size_t i = 0; psz_paths[i]; i += strlen( psz_paths + i ) + 1 )
    {
        if( asprintf( &g_decode_path, "%s/drv4.so.6.0", psz_paths + i ) != -1 )
        {
            p_sys->rv_handle = load_syms_linux(p_dec, g_decode_path);
            free( g_decode_path );
        }
        if( p_sys->rv_handle )