preliminary version

git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@3992 b3059339-0415-0410-9bf9-f77b7e298cf2

1 files changed, 207 insertions, 0 deletions

diff --git a/vidix/vidixlib.c b/vidix/vidixlib.c
new file mode 100644
index 0000000000..1dc4a53e26
--- /dev/null
+++ b/vidix/vidixlib.c
@@ -0,0 +1,207 @@
+/*
+ * vidixlib.c
+ * VIDIXLib - Library for VIDeo Interface for *niX
+ *   This interface is introduced as universal one to MPEG decoder,
+ *   BES == Back End Scaler and YUV2RGB hw accelerators.
+ * In the future it may be expanded up to capturing and audio things.
+ * Main goal of this this interface imlpementation is providing DGA
+ * everywhere where it's possible (unlike X11 and other).
+ * Copyright 2002 Nick Kurshev
+ * Licence: GPL
+ * This interface is based on v4l2, fbvid.h, mga_vid.h projects
+ * and personally my ideas.
+ * NOTE: This interface is introduces as APP interface.
+ * Don't use it for driver.
+ * It provides multistreaming. This mean that APP can handle
+ * several streams simultaneously. (Example: Video capturing and video
+ * playback or capturing, video playback, audio encoding and so on).
+*/
+#include <stdlib.h>
+#include <stdio.h>
+#include <errno.h>
+#include <string.h>
+
+#include <dlfcn.h> /* GLIBC specific. Exists under cygwin too! */
+#include <dirent.h>
+
+#include "vidixlib.h"
+
+
+typedef struct vdl_stream_s
+{
+	void *  handle;
+	int	(*get_caps)(vidix_capability_t *);
+	int	(*query_fourcc)(vidix_fourcc_t *);
+	int	(*config_playback)(const vidix_playback_t *);
+	int	(*map_playback)(vidix_dga_t *);
+	int 	(*playback_on)( void );
+	int 	(*playback_off)( void );
+        /* Functions below can be missed in driver ;) */
+	int	(*init)(void);
+	void    (*destroy)(void);
+	int 	(*frame_sel)( unsigned frame_idx );
+	int 	(*get_eq)( vidix_video_eq_t * );
+	int 	(*set_eq)( const vidix_video_eq_t * );
+	int 	(*copy_frame)( const vidix_dma_t * );
+}vdl_stream_t;
+
+#define t_vdl(p) (((vdl_stream_t *)p))
+
+extern unsigned   vdlGetVersion( void )
+{
+   return VIDIX_VERSION;
+}
+
+static int vdl_fill_driver(VDL_HANDLE stream)
+{
+  t_vdl(stream)->init		= dlsym(t_vdl(stream)->handle,"vixInit");
+  t_vdl(stream)->destroy	= dlsym(t_vdl(stream)->handle,"vixDestroy");
+  t_vdl(stream)->get_caps	= dlsym(t_vdl(stream)->handle,"vixGetCapability");
+  t_vdl(stream)->query_fourcc	= dlsym(t_vdl(stream)->handle,"vixQueryFourcc");
+  t_vdl(stream)->config_playback= dlsym(t_vdl(stream)->handle,"vixConfigPlayback");
+  t_vdl(stream)->map_playback	= dlsym(t_vdl(stream)->handle,"vixMapPlayback");
+  t_vdl(stream)->playback_on	= dlsym(t_vdl(stream)->handle,"vixPlaybackOn");
+  t_vdl(stream)->playback_off	= dlsym(t_vdl(stream)->handle,"vixPlaybackOff");
+  t_vdl(stream)->frame_sel	= dlsym(t_vdl(stream)->handle,"vixPlaybackFrameSelect");
+  t_vdl(stream)->get_eq	= dlsym(t_vdl(stream)->handle,"vixPlaybackGetEq");
+  t_vdl(stream)->set_eq	= dlsym(t_vdl(stream)->handle,"vixPlaybackSetEq");
+  t_vdl(stream)->copy_frame	= dlsym(t_vdl(stream)->handle,"vixPlaybackCopyFrame");
+  /* check driver viability */
+  if(!( t_vdl(stream)->get_caps && t_vdl(stream)->query_fourcc && t_vdl(stream)->config_playback &&
+	t_vdl(stream)->map_playback && t_vdl(stream)->playback_on && t_vdl(stream)->playback_off))
+			return 0;
+  return 1;
+}
+
+static int vdl_probe_driver(VDL_HANDLE stream,const char *path,const char *name,unsigned cap)
+{
+  char drv_name[FILENAME_MAX];
+  vidix_capability_t vid_cap;
+  unsigned (*_ver)(void);
+  int      (*_probe)(void);
+  int      (*_cap)(vidix_capability_t*);
+  strcpy(drv_name,path);
+  strcat(drv_name,name);
+  if(!(t_vdl(stream)->handle = dlopen(drv_name,RTLD_NOW|RTLD_GLOBAL))) return 0;
+  _ver = dlsym(t_vdl(stream)->handle,"vixGetVersion");
+  _probe = dlsym(t_vdl(stream)->handle,"vixProbe");
+  _cap = dlsym(t_vdl(stream)->handle,"vixGetCapability");
+  if(_ver) { if((*_ver)() != VIDIX_VERSION) { err: dlclose(t_vdl(stream)->handle); t_vdl(stream)->handle = 0; return 0; } }
+  else goto err;
+  if(_probe) { if((*_probe)() != 0) goto err; }
+  else goto err;
+  if(_cap) { if((*_cap)(&vid_cap) != 0) goto err; }
+  else goto err;
+  if((vid_cap.type & cap) != cap) goto err;
+  return 1;
+}
+
+static int vdl_find_driver(VDL_HANDLE stream,const char *path,unsigned cap)
+{
+  DIR *dstream;
+  struct dirent *name;
+  int done = 0;
+  if(!(dstream = opendir(path))) return 0;
+  while(!done)
+  {
+    name = readdir(dstream);
+    if(name) { if(vdl_probe_driver(stream,path,name->d_name,cap)) break; }
+    else done = 1;
+  }
+  closedir(dstream);
+  return done?0:1;
+}
+
+VDL_HANDLE vdlOpen(const char *path,const char *name,unsigned cap)
+{
+  vdl_stream_t *stream;
+  char drv_name[FILENAME_MAX];
+  if(!(stream = malloc(sizeof(vdl_stream_t)))) return NULL;
+  memset(stream,0,sizeof(vdl_stream_t));
+  if(name)
+  {
+    unsigned (*ver)(void);
+    unsigned version = 0;
+    strcpy(drv_name,path);
+    strcat(drv_name,name);
+    if(!(t_vdl(stream)->handle = dlopen(drv_name,RTLD_NOW|RTLD_GLOBAL)))
+    {
+      err:
+      free(stream);
+      return NULL;
+    }
+    ver = dlsym(t_vdl(stream)->handle,"vixGetVersion");
+    if(ver) version = (*ver)();
+    if(version != VIDIX_VERSION)
+    {
+      drv_err:
+      if(t_vdl(stream)->handle) dlclose(t_vdl(stream)->handle);
+      goto err;
+    }
+    fill:
+    if(!vdl_fill_driver(stream)) goto drv_err;
+  }
+  else
+    if(vdl_find_driver(stream,path,cap))	goto fill;
+    else					goto err;
+  if(t_vdl(stream)->init) t_vdl(stream)->init();
+  return stream;
+}
+
+void vdlClose(VDL_HANDLE stream)
+{
+  if(t_vdl(stream)->destroy) t_vdl(stream)->destroy();
+  dlclose(t_vdl(stream)->handle);
+  memset(stream,0,sizeof(vdl_stream_t)); /* <- it's not stupid */
+  free(stream);
+}
+
+int  vdlGetCapability(VDL_HANDLE handle, vidix_capability_t *cap)
+{
+  return t_vdl(handle)->get_caps(cap);
+}
+
+int  vdlQueryFourcc(VDL_HANDLE handle,vidix_fourcc_t *f)
+{
+  return t_vdl(handle)->query_fourcc(f);
+}
+
+int  vdlConfigPlayback(VDL_HANDLE handle,const vidix_playback_t *p)
+{
+  return t_vdl(handle)->config_playback(p);
+}
+
+int  vdlMapPlayback(VDL_HANDLE handle,vidix_dga_t *m)
+{
+  return t_vdl(handle)->map_playback(m);
+}
+
+int  vdlPlaybackOn(VDL_HANDLE handle)
+{
+  return t_vdl(handle)->playback_on();
+}
+
+int  vdlPlaybackOff(VDL_HANDLE handle)
+{
+  return t_vdl(handle)->playback_off();
+}
+
+int  vdlPlaybackFrameSelect(VDL_HANDLE handle, unsigned frame_idx )
+{
+  return t_vdl(handle)->frame_sel ? t_vdl(handle)->frame_sel(frame_idx) : ENOSYS;
+}
+
+int  vdlPlaybackGetEq(VDL_HANDLE handle, vidix_video_eq_t * e)
+{
+  return t_vdl(handle)->get_eq ? t_vdl(handle)->get_eq(e) : ENOSYS;
+}
+
+int  vdlPlaybackSetEq(VDL_HANDLE handle, const vidix_video_eq_t * e)
+{
+  return t_vdl(handle)->set_eq ? t_vdl(handle)->set_eq(e) : ENOSYS;
+}
+
+int  vdlPlaybackCopyFrame(VDL_HANDLE handle, const vidix_dma_t * f)
+{
+  return t_vdl(handle)->copy_frame ? t_vdl(handle)->copy_frame(f) : ENOSYS;
+}