vidix/vidixlib.c

   1 /*
   2  * vidixlib.c
   3  * VIDIXLib - Library for VIDeo Interface for *niX
   4  *   This interface is introduced as universal one to MPEG decoder,
   5  *   BES == Back End Scaler and YUV2RGB hw accelerators.
   6  * In the future it may be expanded up to capturing and audio things.
   7  * Main goal of this this interface imlpementation is providing DGA
   8  * everywhere where it's possible (unlike X11 and other).
   9  * Copyright 2002 Nick Kurshev
  10  * Licence: GPL
  11  * This interface is based on v4l2, fbvid.h, mga_vid.h projects
  12  * and personally my ideas.
  13  * NOTE: This interface is introduces as APP interface.
  14  * Don't use it for driver.
  15  * It provides multistreaming. This mean that APP can handle
  16  * several streams simultaneously. (Example: Video capturing and video
  17  * playback or capturing, video playback, audio encoding and so on).
  18 */
  19 #include <stdlib.h>
  20 #include <stdio.h>
  21 #include <errno.h>
  22 #include <string.h>
  23
  24 #ifndef WIN32
  25 #include <dlfcn.h> /* GLIBC specific. Exists under cygwin too! */
  26 #else
  27 #include <windows.h>
  28 #define dlsym(h,s) GetProcAddress(h,s)
  29 #define dlopen(h,s) LoadLibrary(h)
  30 #define dlclose(h) FreeLibrary(h)
  31 static char* dlerror(){
  32  char errormsg[10];
  33  sprintf(errormsg,"%i\n",GetLastError());
  34  return errormsg;
  35 }
  36 #endif
  37
  38
  39 #include <dirent.h>
  40
  41 #if defined(__OpenBSD__) && !defined(__ELF__)
  42 #define dlsym(h,s) dlsym(h, "_" s)
  43 #endif
  44
  45 #include "vidixlib.h"
  46 #include "../bswap.h"
  47 #include "../config.h"
  48
  49 static char drv_name[FILENAME_MAX];
  50
  51 typedef struct vdl_stream_s
  52 {
  53         void *  handle;
  54         int     (*get_caps)(vidix_capability_t *);
  55         int     (*query_fourcc)(vidix_fourcc_t *);
  56         int     (*config_playback)(vidix_playback_t *);
  57         int     (*playback_on)( void );
  58         int     (*playback_off)( void );
  59         /* Functions below can be missed in driver ;) */
  60         int     (*init)(void);
  61         void    (*destroy)(void);
  62         int     (*frame_sel)( unsigned frame_idx );
  63         int     (*get_eq)( vidix_video_eq_t * );
  64         int     (*set_eq)( const vidix_video_eq_t * );
  65         int     (*get_deint)( vidix_deinterlace_t * );
  66         int     (*set_deint)( const vidix_deinterlace_t * );
  67         int     (*copy_frame)( const vidix_dma_t * );
  68         int     (*get_gkey)( vidix_grkey_t * );
  69         int     (*set_gkey)( const vidix_grkey_t * );
  70         int     (*get_num_fx)( unsigned * );
  71         int     (*get_fx)( vidix_oem_fx_t * );
  72         int     (*set_fx)( const vidix_oem_fx_t * );
  73 }vdl_stream_t;
  74
  75 #define t_vdl(p) (((vdl_stream_t *)p))
  76
  77 extern unsigned   vdlGetVersion( void )
  78 {
  79    return VIDIX_VERSION;
  80 }
  81
  82 static int vdl_fill_driver(VDL_HANDLE stream)
  83 {
  84   t_vdl(stream)->init           = dlsym(t_vdl(stream)->handle,"vixInit");
  85   t_vdl(stream)->destroy        = dlsym(t_vdl(stream)->handle,"vixDestroy");
  86   t_vdl(stream)->get_caps       = dlsym(t_vdl(stream)->handle,"vixGetCapability");
  87   t_vdl(stream)->query_fourcc   = dlsym(t_vdl(stream)->handle,"vixQueryFourcc");
  88   t_vdl(stream)->config_playback= dlsym(t_vdl(stream)->handle,"vixConfigPlayback");
  89   t_vdl(stream)->playback_on    = dlsym(t_vdl(stream)->handle,"vixPlaybackOn");
  90   t_vdl(stream)->playback_off   = dlsym(t_vdl(stream)->handle,"vixPlaybackOff");
  91   t_vdl(stream)->frame_sel      = dlsym(t_vdl(stream)->handle,"vixPlaybackFrameSelect");
  92   t_vdl(stream)->get_eq = dlsym(t_vdl(stream)->handle,"vixPlaybackGetEq");
  93   t_vdl(stream)->set_eq = dlsym(t_vdl(stream)->handle,"vixPlaybackSetEq");
  94   t_vdl(stream)->get_gkey       = dlsym(t_vdl(stream)->handle,"vixGetGrKeys");
  95   t_vdl(stream)->set_gkey       = dlsym(t_vdl(stream)->handle,"vixSetGrKeys");
  96   t_vdl(stream)->get_deint      = dlsym(t_vdl(stream)->handle,"vixPlaybackGetDeint");
  97   t_vdl(stream)->set_deint      = dlsym(t_vdl(stream)->handle,"vixPlaybackSetDeint");
  98   t_vdl(stream)->copy_frame     = dlsym(t_vdl(stream)->handle,"vixPlaybackCopyFrame");
  99   t_vdl(stream)->get_num_fx     = dlsym(t_vdl(stream)->handle,"vixQueryNumOemEffects");
 100   t_vdl(stream)->get_fx         = dlsym(t_vdl(stream)->handle,"vixGetOemEffect");
 101   t_vdl(stream)->set_fx         = dlsym(t_vdl(stream)->handle,"vixSetOemEffect");
 102   /* check driver viability */
 103   if(!( t_vdl(stream)->get_caps && t_vdl(stream)->query_fourcc &&
 104         t_vdl(stream)->config_playback && t_vdl(stream)->playback_on &&
 105         t_vdl(stream)->playback_off))
 106   {
 107     printf("vidixlib: Incomplete driver: some of essential features are missed in it.\n");
 108     return 0;
 109   }
 110   return 1;
 111 }
 112
 113 #ifndef RTLD_GLOBAL
 114 #define RTLD_GLOBAL RTLD_LAZY
 115 #endif
 116 #ifndef RTLD_NOW
 117 #define RTLD_NOW RTLD_LAZY
 118 #endif
 119
 120 static int vdl_probe_driver(VDL_HANDLE stream,const char *path,const char *name,unsigned cap,int verbose)
 121 {
 122   vidix_capability_t vid_cap;
 123   unsigned (*_ver)(void);
 124   int      (*_probe)(int,int);
 125   int      (*_cap)(vidix_capability_t*);
 126   strlcpy(drv_name,path, sizeof( drv_name ));
 127   strlcat(drv_name,name, sizeof( drv_name ));
 128   if(verbose) printf("vidixlib: PROBING: %s\n",drv_name);
 129   if(!(t_vdl(stream)->handle = dlopen(drv_name,RTLD_LAZY|RTLD_GLOBAL)))
 130   {
 131     if(verbose) printf("vidixlib: %s not driver: %s\n",drv_name,dlerror());
 132     return 0;
 133   }
 134   _ver = dlsym(t_vdl(stream)->handle,"vixGetVersion");
 135   _probe = dlsym(t_vdl(stream)->handle,"vixProbe");
 136   _cap = dlsym(t_vdl(stream)->handle,"vixGetCapability");
 137   if(_ver)
 138   {
 139     if((*_ver)() != VIDIX_VERSION)
 140     {
 141       if(verbose) printf("vidixlib: %s has wrong version\n",drv_name);
 142       err:
 143       dlclose(t_vdl(stream)->handle);
 144       t_vdl(stream)->handle = 0;
 145       return 0;
 146      }
 147   }
 148   else
 149   {
 150     fatal_err:
 151     if(verbose) printf("vidixlib: %s has no function definition\n",drv_name);
 152     goto err;
 153   }
 154   if(_probe) { if((*_probe)(verbose,PROBE_NORMAL) != 0) goto err; }
 155   else goto fatal_err;
 156   if(_cap) { if((*_cap)(&vid_cap) != 0) goto err; }
 157   else goto fatal_err;
 158   if((vid_cap.type & cap) != cap)
 159   {
 160      if(verbose) printf("vidixlib: Found %s but has no required capability\n",drv_name);
 161      goto err;
 162   }
 163   if(verbose) printf("vidixlib: %s probed o'k\n",drv_name);
 164   return 1;
 165 }
 166
 167 static int vdl_find_driver(VDL_HANDLE stream,const char *path,unsigned cap,int verbose)
 168 {
 169   DIR *dstream;
 170   struct dirent *name;
 171   int done = 0;
 172   if(!(dstream = opendir(path))) return 0;
 173   while(!done)
 174   {
 175     name = readdir(dstream);
 176     if(name)
 177     {
 178       if(name->d_name[0] != '.')
 179         if(vdl_probe_driver(stream,path,name->d_name,cap,verbose)) break;
 180     }
 181     else done = 1;
 182   }
 183   closedir(dstream);
 184   return done?0:1;
 185 }
 186
 187 VDL_HANDLE vdlOpen(const char *path,const char *name,unsigned cap,int verbose)
 188 {
 189   vdl_stream_t *stream;
 190   int errcode;
 191   if(!(stream = malloc(sizeof(vdl_stream_t)))) return NULL;
 192   memset(stream,0,sizeof(vdl_stream_t));
 193   if(name)
 194   {
 195     unsigned (*ver)(void);
 196     int (*probe)(int,int);
 197     unsigned version = 0;
 198     strlcpy(drv_name,path, sizeof( drv_name ));
 199     strlcat(drv_name,name, sizeof( drv_name ));
 200     if(!(t_vdl(stream)->handle = dlopen(drv_name,RTLD_NOW|RTLD_GLOBAL)))
 201     {
 202       if (verbose)
 203         printf("vidixlib: dlopen error: %s\n", dlerror());
 204       err:
 205       free(stream);
 206       return NULL;
 207     }
 208     ver = dlsym(t_vdl(stream)->handle,"vixGetVersion");
 209     if(ver) version = (*ver)();
 210     if(version != VIDIX_VERSION)
 211     {
 212       drv_err:
 213       if(t_vdl(stream)->handle) dlclose(t_vdl(stream)->handle);
 214       goto err;
 215     }
 216     probe = dlsym(t_vdl(stream)->handle,"vixProbe");
 217     if(probe) { if((*probe)(verbose,PROBE_FORCE)!=0) goto drv_err; }
 218     else goto drv_err;
 219     fill:
 220     if(!vdl_fill_driver(stream)) goto drv_err;
 221     goto ok;
 222   }
 223   else
 224     if(vdl_find_driver(stream,path,cap,verbose))
 225     {
 226       if(verbose) printf("vidixlib: will use %s driver\n",drv_name);
 227       goto fill;
 228     }
 229     else goto err;
 230   ok:
 231   if(t_vdl(stream)->init)
 232   {
 233    if(verbose) printf("vidixlib: Attempt to initialize driver at: %p\n",t_vdl(stream)->init);
 234    if((errcode=t_vdl(stream)->init())!=0)
 235    {
 236     if(verbose) printf("vidixlib: Can't init driver: %s\n",strerror(errcode));
 237     goto drv_err;
 238    }
 239   }
 240   if(verbose) printf("vidixlib: '%s'successfully loaded\n",drv_name);
 241   return stream;
 242 }
 243
 244 void vdlClose(VDL_HANDLE stream)
 245 {
 246   if(t_vdl(stream)->destroy) t_vdl(stream)->destroy();
 247   dlclose(t_vdl(stream)->handle);
 248   memset(stream,0,sizeof(vdl_stream_t)); /* <- it's not stupid */
 249   free(stream);
 250 }
 251
 252 int  vdlGetCapability(VDL_HANDLE handle, vidix_capability_t *cap)
 253 {
 254   return t_vdl(handle)->get_caps(cap);
 255 }
 256
 257 #define MPLAYER_IMGFMT_RGB (('R'<<24)|('G'<<16)|('B'<<8))
 258 #define MPLAYER_IMGFMT_BGR (('B'<<24)|('G'<<16)|('R'<<8))
 259 #define MPLAYER_IMGFMT_RGB_MASK 0xFFFFFF00
 260
 261 static uint32_t normalize_fourcc(uint32_t fourcc)
 262 {
 263   if((fourcc & MPLAYER_IMGFMT_RGB_MASK) == (MPLAYER_IMGFMT_RGB|0) ||
 264      (fourcc & MPLAYER_IMGFMT_RGB_MASK) == (MPLAYER_IMGFMT_BGR|0))
 265         return bswap_32(fourcc);
 266   else  return fourcc;
 267 }
 268
 269 int  vdlQueryFourcc(VDL_HANDLE handle,vidix_fourcc_t *f)
 270 {
 271   f->fourcc = normalize_fourcc(f->fourcc);
 272   return t_vdl(handle)->query_fourcc(f);
 273 }
 274
 275 int  vdlConfigPlayback(VDL_HANDLE handle,vidix_playback_t *p)
 276 {
 277   p->fourcc = normalize_fourcc(p->fourcc);
 278   return t_vdl(handle)->config_playback(p);
 279 }
 280
 281 int  vdlPlaybackOn(VDL_HANDLE handle)
 282 {
 283   return t_vdl(handle)->playback_on();
 284 }
 285
 286 int  vdlPlaybackOff(VDL_HANDLE handle)
 287 {
 288   return t_vdl(handle)->playback_off();
 289 }
 290
 291 int  vdlPlaybackFrameSelect(VDL_HANDLE handle, unsigned frame_idx )
 292 {
 293   return t_vdl(handle)->frame_sel ? t_vdl(handle)->frame_sel(frame_idx) : ENOSYS;
 294 }
 295
 296 int  vdlPlaybackGetEq(VDL_HANDLE handle, vidix_video_eq_t * e)
 297 {
 298   return t_vdl(handle)->get_eq ? t_vdl(handle)->get_eq(e) : ENOSYS;
 299 }
 300
 301 int  vdlPlaybackSetEq(VDL_HANDLE handle, const vidix_video_eq_t * e)
 302 {
 303   return t_vdl(handle)->set_eq ? t_vdl(handle)->set_eq(e) : ENOSYS;
 304 }
 305
 306 int  vdlPlaybackCopyFrame(VDL_HANDLE handle, const vidix_dma_t * f)
 307 {
 308   return t_vdl(handle)->copy_frame ? t_vdl(handle)->copy_frame(f) : ENOSYS;
 309 }
 310
 311 int       vdlGetGrKeys(VDL_HANDLE handle, vidix_grkey_t * k)
 312 {
 313   return t_vdl(handle)->get_gkey ? t_vdl(handle)->get_gkey(k) : ENOSYS;
 314 }
 315
 316 int       vdlSetGrKeys(VDL_HANDLE handle, const vidix_grkey_t * k)
 317 {
 318   return t_vdl(handle)->set_gkey ? t_vdl(handle)->set_gkey(k) : ENOSYS;
 319 }
 320
 321 int       vdlPlaybackGetDeint(VDL_HANDLE handle, vidix_deinterlace_t * d)
 322 {
 323   return t_vdl(handle)->get_deint ? t_vdl(handle)->get_deint(d) : ENOSYS;
 324 }
 325
 326 int       vdlPlaybackSetDeint(VDL_HANDLE handle, const vidix_deinterlace_t * d)
 327 {
 328   return t_vdl(handle)->set_deint ? t_vdl(handle)->set_deint(d) : ENOSYS;
 329 }
 330
 331 int       vdlQueryNumOemEffects(VDL_HANDLE handle, unsigned * number )
 332 {
 333   return t_vdl(handle)->get_num_fx ? t_vdl(handle)->get_num_fx(number) : ENOSYS;
 334 }
 335
 336 int       vdlGetOemEffect(VDL_HANDLE handle, vidix_oem_fx_t * f)
 337 {
 338   return t_vdl(handle)->get_fx ? t_vdl(handle)->get_fx(f) : ENOSYS;
 339 }
 340
 341 int       vdlSetOemEffect(VDL_HANDLE handle, const vidix_oem_fx_t * f)
 342 {
 343   return t_vdl(handle)->set_fx ? t_vdl(handle)->set_fx(f) : ENOSYS;
 344 }