Merge mediacontrol to trunk

Makefile.am

@@ -60,6 +60,7 @@ dist_pkginclude_HEADERS = \
 	include/vlc/decoder.h \
 	include/vlc/input.h \
 	include/vlc/intf.h \
+	include/vlc/control.h \
 	$(NULL)
 
 noinst_HEADERS = $(HEADERS_include) $(HEADERS_include_built)
@@ -412,6 +413,9 @@ SOURCES_libvlc_common = \
 	src/misc/vlm.c \
 	src/misc/xml.c \
 	src/extras/libc.c \
+	src/control/core.c \
+	src/control/util.c \
+	src/control/audio_video.c \
 	$(NULL)
 
 SOURCES_libvlc = \

include/vlc/control.h

+/*****************************************************************************
+ * control.h: global header for mediacontrol
+ *****************************************************************************
+ * Copyright (C) 2005 VideoLAN
+ * $Id: vlc.h 10101 2005-03-02 16:47:31Z robux4 $
+ *
+ * Authors: Olivier Aubert <olivier.aubert@liris.univ-lyon1.fr>
+ *
+ * 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., 59 Temple Place - Suite 330, Boston, MA  02111, USA.
+ *****************************************************************************/
+
+#ifndef _VLC_CONTROL_H
+#define _VLC_CONTROL_H 1
+
+# ifdef __cplusplus
+extern "C" {
+# endif
+
+#include <vlc/vlc.h>
+
+#if defined( WIN32 )
+#define WINDOWHANDLE HWND
+#else
+#define WINDOWHANDLE int
+#endif
+
+
+typedef int bool;
+
+/************************************************************************
+ * Position Object Manipulation
+ *************************************************************************/
+typedef enum  {
+  mediacontrol_AbsolutePosition,
+  mediacontrol_RelativePosition,
+  mediacontrol_ModuloPosition
+} mediacontrol_PositionOrigin;
+
+typedef enum {
+  mediacontrol_ByteCount,
+  mediacontrol_SampleCount,
+  mediacontrol_MediaTime
+} mediacontrol_PositionKey;
+
+typedef struct {
+  mediacontrol_PositionOrigin origin;
+  mediacontrol_PositionKey key;
+  long value;
+} mediacontrol_Position;
+
+typedef struct {
+  int  width;
+  int  height;
+  long type;
+  long long date;
+  int  size;
+  char* data;
+} mediacontrol_RGBPicture;
+
+typedef struct {
+  int size;
+  char** data;
+} mediacontrol_PlaylistSeq;
+
+typedef struct {
+  int code;
+  char* message;
+} mediacontrol_Exception;
+
+/* Exception codes */
+#define mediacontrol_PositionKeyNotSupported    1
+#define mediacontrol_PositionOriginNotSupported 2
+#define mediacontrol_InvalidPosition            3
+#define mediacontrol_PlaylistException          4
+#define mediacontrol_InternalException          5
+
+typedef struct {
+  vlc_object_t  *p_vlc;
+  playlist_t    *p_playlist;
+  intf_thread_t *p_intf;
+  int           vlc_object_id;
+} mediacontrol_Instance;
+
+/* Cf stream_control.h */
+enum mediacontrol_PlayerStatusList
+  {
+    mediacontrol_PlayingStatus, mediacontrol_PauseStatus,
+    mediacontrol_ForwardStatus, mediacontrol_BackwardStatus,
+    mediacontrol_InitStatus,    mediacontrol_EndStatus,
+    mediacontrol_UndefinedStatus
+  };
+typedef enum mediacontrol_PlayerStatusList mediacontrol_PlayerStatus;
+
+typedef struct {
+    mediacontrol_PlayerStatus streamstatus;
+    char* url;         /* The URL of the current media stream */
+    long long position;     /* actual location in the stream (in ms) */
+    long long length;         /* total length of the stream (in ms) */
+  } mediacontrol_StreamInformation;
+
+/**************************************************************************
+ *  Helper functions
+ ***************************************************************************/
+long long mediacontrol_unit_convert (input_thread_t *p_input,
+                                     mediacontrol_PositionKey from,
+                                     mediacontrol_PositionKey to,
+                                     long long value);
+long long
+mediacontrol_position2microsecond (input_thread_t* p_input, const mediacontrol_Position * pos);
+
+mediacontrol_RGBPicture* mediacontrol_RGBPicture__alloc (int datasize);
+void mediacontrol_RGBPicture__free (mediacontrol_RGBPicture* pic);
+mediacontrol_PlaylistSeq* mediacontrol_PlaylistSeq__alloc (int size);
+void mediacontrol_PlaylistSeq__free (mediacontrol_PlaylistSeq* ps);
+
+mediacontrol_Exception* mediacontrol_exception_init(mediacontrol_Exception *exception);
+void mediacontrol_exception_free(mediacontrol_Exception *exception);
+
+/*****************************************************************************
+ * Core functions
+ *****************************************************************************/
+mediacontrol_Instance* mediacontrol_new(char** args, mediacontrol_Exception *exception);
+mediacontrol_Instance* mediacontrol_new_from_object(vlc_object_t* p_object,
+                            mediacontrol_Exception *exception);
+
+mediacontrol_Position* mediacontrol_get_media_position(
+                                       mediacontrol_Instance *self,
+                                       mediacontrol_PositionOrigin an_origin,
+                                       mediacontrol_PositionKey a_key,
+                                       mediacontrol_Exception *exception);
+void mediacontrol_set_media_position(mediacontrol_Instance *self,
+                                     const mediacontrol_Position* a_position,
+                                     mediacontrol_Exception *exception);
+void mediacontrol_start( mediacontrol_Instance *self,
+                         const mediacontrol_Position* a_position,
+                         mediacontrol_Exception *exception);
+
+void mediacontrol_pause(mediacontrol_Instance *self,
+                        const mediacontrol_Position* a_position, 
+                        mediacontrol_Exception *exception);
+
+void mediacontrol_resume(mediacontrol_Instance *self,
+                         const mediacontrol_Position* a_position,
+                         mediacontrol_Exception *exception);
+
+void mediacontrol_stop(mediacontrol_Instance *self,
+                       const mediacontrol_Position* a_position,
+                       mediacontrol_Exception *exception);
+void mediacontrol_exit(mediacontrol_Instance *self);
+
+void mediacontrol_playlist_add_item (mediacontrol_Instance *self,
+                                     const char* psz_file,
+                                     mediacontrol_Exception *exception);
+void mediacontrol_playlist_clear (mediacontrol_Instance *self,
+                                  mediacontrol_Exception *exception);
+mediacontrol_PlaylistSeq* mediacontrol_playlist_get_list (
+                                mediacontrol_Instance *self,
+                                mediacontrol_Exception *exception);
+
+
+/*****************************************************************************
+ * A/V functions
+ *****************************************************************************/
+mediacontrol_RGBPicture* mediacontrol_snapshot (mediacontrol_Instance *self,
+                                const mediacontrol_Position* a_position,
+                                mediacontrol_Exception *exception);
+
+/* Return a NULL terminated list */
+mediacontrol_RGBPicture** mediacontrol_all_snapshots (mediacontrol_Instance *self,
+						      mediacontrol_Exception *exception);
+
+// Displays the message string, between "begin" and "end" positions
+void mediacontrol_display_text (mediacontrol_Instance *self,
+				const char* message, 
+				const mediacontrol_Position* begin, 
+				const mediacontrol_Position* end,
+				mediacontrol_Exception *exception);
+
+mediacontrol_StreamInformation* 
+mediacontrol_get_stream_information(mediacontrol_Instance* self,
+				    mediacontrol_PositionKey a_key,
+				    mediacontrol_Exception *exception);
+
+unsigned short mediacontrol_sound_get_volume(mediacontrol_Instance* self,
+					     mediacontrol_Exception *exception);
+void mediacontrol_sound_set_volume(mediacontrol_Instance* self,
+				   const unsigned short volume,
+				   mediacontrol_Exception *exception);
+
+bool mediacontrol_set_visual(mediacontrol_Instance* self,
+			     WINDOWHANDLE visual_id,
+			     mediacontrol_Exception *exception);
+
+# ifdef __cplusplus
+}
+# endif
+
+#endif
+

src/control/audio_video.c

+/*****************************************************************************
+ * audio_video.c: Audio/Video management : volume, snapshot, OSD
+ *****************************************************************************
+ * Copyright (C) 2005 VideoLAN
+ * $Id: vlc.c 10786 2005-04-23 23:19:17Z zorglub $
+ *
+ * Authors: Olivier Aubert <olivier.aubert@liris.univ-lyon1.fr>
+ *
+ * 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., 59 Temple Place - Suite 330, Boston, MA  02111, USA.
+ *****************************************************************************/
+
+#include <vlc/control.h>
+
+#include <vlc/intf.h>
+#include <vlc/vout.h>
+#include <vlc/aout.h>
+#include <vlc_demux.h>
+
+#include <osd.h>
+
+#define HAS_SNAPSHOT 1
+
+#ifdef HAS_SNAPSHOT
+#include <snapshot.h>
+#endif
+
+#include <stdlib.h>                                      /* malloc(), free() */
+#include <string.h>
+
+#include <errno.h>                                                 /* ENOMEM */
+#include <stdio.h>
+#include <ctype.h>
+
+#ifdef HAVE_UNISTD_H
+#    include <unistd.h>
+#endif
+
+#ifdef HAVE_SYS_TIME_H
+#    include <sys/time.h>
+#endif
+#include <sys/types.h>
+
+#define RAISE( c, m )  exception->code = c; \
+                       exception->message = strdup(m);
+
+mediacontrol_RGBPicture *
+mediacontrol_snapshot( mediacontrol_Instance *self,
+                       const mediacontrol_Position * a_position,
+                       mediacontrol_Exception *exception )
+{
+    mediacontrol_RGBPicture *retval = NULL;
+    input_thread_t* p_input = self->p_playlist->p_input;
+    vout_thread_t *p_vout = NULL;
+    int i_datasize;
+    snapshot_t **pointer;
+    vlc_value_t val;
+    int i_index;
+    snapshot_t *p_best_snapshot;
+    long searched_date;
+#ifdef HAS_SNAPSHOT
+    int i_cachesize;
+#endif
+
+    exception=mediacontrol_exception_init( exception );
+
+    /*
+       if( var_Get( self->p_vlc, "snapshot-id", &val ) == VLC_SUCCESS )
+       p_vout = vlc_object_get( self->p_vlc, val.i_int );
+    */
+
+    /* FIXME: if in p_libvlc, we cannot have multiple video outputs */
+    /* Once corrected, search for snapshot-id to modify all instances */
+    if( var_Get( p_input, "snapshot-id", &val ) != VLC_SUCCESS )
+    {
+        RAISE( mediacontrol_InternalException, "No snapshot-id in p_input" );
+        return NULL;
+    }
+    p_vout = vlc_object_get( self->p_vlc, val.i_int );
+
+    if( ! p_vout )
+    {
+        RAISE( mediacontrol_InternalException, "No snapshot module" );
+        return NULL;
+    }
+
+#ifdef HAS_SNAPSHOT
+    /* We test if the vout is a snapshot module. We cannot test
+       pvout_psz_object_name( which is NULL ). But we can check if
+       there are snapshot-specific variables */
+    if( var_Get( p_vout, "snapshot-datasize", &val ) != VLC_SUCCESS )
+    {
+        RAISE( mediacontrol_InternalException, "No snapshot module" );
+        vlc_object_release( p_vout );
+        return NULL;
+    }
+    i_datasize = val.i_int;
+
+    /* Handle the a_position parameter */
+    if( ! ( a_position->origin == mediacontrol_RelativePosition
+            && a_position->value == 0 ) )
+    {
+        /* The position is not the current one. Go to it. */
+        mediacontrol_set_media_position( self,
+                                         ( mediacontrol_Position* ) a_position,
+                                         exception );
+        if( exception->code )
+        {
+            vlc_object_release( p_vout );
+            return NULL;
+        }
+    }
+
+    /* FIXME: We should not go further until we got past the position
+       ( which means that we had the possibility to capture the right
+       picture ). */
+
+    vlc_mutex_lock( &p_vout->picture_lock );
+
+    searched_date = mediacontrol_position2microsecond( p_input,
+                                                       ( mediacontrol_Position * ) a_position );
+
+    var_Get( p_vout, "snapshot-cache-size", &val );
+    i_cachesize = val.i_int  ;
+
+    var_Get( p_vout, "snapshot-list-pointer", &val );
+    pointer = ( snapshot_t ** )val.p_address;
+
+    if( ! pointer )
+    {
+        RAISE( mediacontrol_InternalException, "No available snapshot" );
+
+        vlc_mutex_unlock( &p_vout->picture_lock );
+        vlc_object_release( p_vout );
+        return NULL;
+    }
+
+    /* Find the more appropriate picture, based on date */
+    p_best_snapshot = pointer[0];
+
+    for( i_index = 1 ; i_index < i_cachesize ; i_index++ )
+    {
+        long l_diff = pointer[i_index]->date - searched_date;
+        if( l_diff > 0 && l_diff < abs( p_best_snapshot->date - searched_date ))
+        {
+            /* This one is closer, and _after_ the requested position */
+            p_best_snapshot = pointer[i_index];
+        }
+    }
+
+    /* FIXME: add a test for the case that no picture matched the test
+       ( we have p_best_snapshot == pointer[0] */
+    retval = _mediacontrol_createRGBPicture( p_best_snapshot->i_width,
+                                             p_best_snapshot->i_height,
+                                             p_vout->output.i_chroma,
+                                             p_best_snapshot->date,
+                                             p_best_snapshot->p_data,
+                                             i_datasize );
+
+    vlc_mutex_unlock( &p_vout->picture_lock );
+    vlc_object_release( p_vout );
+
+#endif
+
+    return retval;
+}
+
+mediacontrol_RGBPicture **
+mediacontrol_all_snapshots( mediacontrol_Instance *self,
+                            mediacontrol_Exception *exception )
+{
+    mediacontrol_RGBPicture **retval = NULL;
+    vout_thread_t *p_vout = NULL;
+    int i_datasize;
+    int i_cachesize;
+    vlc_value_t val;
+    int i_index;
+#ifdef HAS_SNAPSHOT
+    snapshot_t **pointer;
+#endif
+
+    exception=mediacontrol_exception_init( exception );
+
+    if( var_Get( self->p_playlist->p_input, "snapshot-id", &val ) == VLC_SUCCESS )
+        p_vout = vlc_object_get( self->p_vlc, val.i_int );
+
+    if( ! p_vout )
+    {
+        RAISE( mediacontrol_InternalException, "No snapshot module" );
+        return NULL;
+    }
+#ifdef HAS_SNAPSHOT
+    /* We test if the vout is a snapshot module. We cannot test
+       pvout_psz_object_name( which is NULL ). But we can check if
+       there are snapshot-specific variables */
+    if( var_Get( p_vout, "snapshot-datasize", &val ) != VLC_SUCCESS )
+    {
+        RAISE( mediacontrol_InternalException, "No snapshot module" );
+        vlc_object_release( p_vout );
+        return NULL;
+    }
+    i_datasize = val.i_int;
+
+    vlc_mutex_lock( &p_vout->picture_lock );
+
+    var_Get( p_vout, "snapshot-cache-size", &val );
+    i_cachesize = val.i_int  ;
+
+    var_Get( p_vout, "snapshot-list-pointer", &val );
+    pointer = ( snapshot_t ** )val.p_address;
+
+    if( ! pointer )
+    {
+        RAISE( mediacontrol_InternalException, "No available picture" );
+
+        vlc_mutex_unlock( &p_vout->picture_lock );
+        vlc_object_release( p_vout );
+        return NULL;
+    }
+
+    retval = ( mediacontrol_RGBPicture** )malloc( (i_cachesize + 1 ) * sizeof( char* ));
+
+    for( i_index = 0 ; i_index < i_cachesize ; i_index++ )
+    {
+        snapshot_t *p_s = pointer[i_index];
+        mediacontrol_RGBPicture *p_rgb;
+
+        p_rgb = _mediacontrol_createRGBPicture( p_s->i_width,
+                                                p_s->i_height,
+                                                p_vout->output.i_chroma,
+                                                p_s->date,
+                                                p_s->p_data,
+                                                i_datasize );
+
+        retval[i_index] = p_rgb;
+    }
+
+    retval[i_cachesize] = NULL;
+
+    vlc_mutex_unlock( &p_vout->picture_lock );
+    vlc_object_release( p_vout );
+
+#endif
+
+    return retval;
+}
+
+int mediacontrol_showtext( vout_thread_t *p_vout, int i_channel,
+                           char *psz_string, text_style_t *p_style,
+                           int i_flags, int i_hmargin, int i_vmargin,
+                           mtime_t i_start, mtime_t i_stop )
+{
+    subpicture_t *p_spu;
+    video_format_t fmt;
+
+    if( !psz_string ) return VLC_EGENERIC;
+
+    p_spu = spu_CreateSubpicture( p_vout->p_spu );
+    if( !p_spu ) return VLC_EGENERIC;
+
+    /* Create a new subpicture region */
+    memset( &fmt, 0, sizeof(video_format_t) );
+    fmt.i_chroma = VLC_FOURCC('T','E','X','T');
+    fmt.i_aspect = 0;
+    fmt.i_width = fmt.i_height = 0;
+    fmt.i_x_offset = fmt.i_y_offset = 0;
+    p_spu->p_region = p_spu->pf_create_region( VLC_OBJECT(p_vout), &fmt );
+    if( !p_spu->p_region )
+    {
+        msg_Err( p_vout, "cannot allocate SPU region" );
+        spu_DestroySubpicture( p_vout->p_spu, p_spu );
+        return VLC_EGENERIC;
+    }
+
+    p_spu->p_region->psz_text = strdup( psz_string );
+    p_spu->i_start = i_start;
+    p_spu->i_stop = i_stop;
+    p_spu->b_ephemer = VLC_FALSE;
+    p_spu->b_absolute = VLC_FALSE;
+
+    p_spu->i_x = i_hmargin;
+    p_spu->i_y = i_vmargin;
+    p_spu->i_flags = i_flags;
+    p_spu->i_channel = i_channel;
+
+    spu_DisplaySubpicture( p_vout->p_spu, p_spu );
+
+    return VLC_SUCCESS;
+}
+
+
+void
+mediacontrol_display_text( mediacontrol_Instance *self,
+                           const char * message,
+                           const mediacontrol_Position * begin,
+                           const mediacontrol_Position * end,
+                           mediacontrol_Exception *exception )
+{
+    input_thread_t *p_input = NULL;
+    vout_thread_t *p_vout = NULL;
+    char* psz_message;
+
+    psz_message = strdup( message );
+    if( !psz_message )
+    {
+        RAISE( mediacontrol_InternalException, "No more memory" );
+        return;
+    }
+
+    p_vout = vlc_object_find( self->p_playlist, VLC_OBJECT_VOUT, FIND_CHILD );
+    if( ! p_vout )
+    {
+        RAISE( mediacontrol_InternalException, "No video output" );
+        return;
+    }
+
+    if( begin->origin == mediacontrol_RelativePosition &&
+        begin->value == 0 &&
+        end->origin == mediacontrol_RelativePosition )
+    {
+        mtime_t i_duration = 0;
+	mtime_t i_now = mdate();
+
+        i_duration = 1000 * mediacontrol_unit_convert( self->p_playlist->p_input,
+                                                       end->key,
+                                                       mediacontrol_MediaTime,
+                                                       end->value );
+
+        mediacontrol_showtext( p_vout, DEFAULT_CHAN, psz_message, NULL,
+                               OSD_ALIGN_BOTTOM | OSD_ALIGN_LEFT, 0, 0,
+                               i_now, i_now + i_duration );
+    }
+    else
+    {
+        mtime_t i_debut, i_fin, i_now;
+
+        p_input = self->p_playlist->p_input;
+        if( ! p_input )
+        {
+            RAISE( mediacontrol_InternalException, "No input" );
+            vlc_object_release( p_vout );
+            return;
+        }
+
+        /* FIXME */
+        /* i_now = input_ClockGetTS( p_input, NULL, 0 ); */
+        i_now = mdate();
+        
+        i_debut = mediacontrol_position2microsecond( p_input,
+                                                     ( mediacontrol_Position* ) begin );
+        i_debut += i_now;
+
+        i_fin = mediacontrol_position2microsecond( p_input,
+                                                   ( mediacontrol_Position * ) end );
+        i_fin += i_now;
+
+        vout_ShowTextAbsolute( p_vout, DEFAULT_CHAN, psz_message, NULL,
+                               OSD_ALIGN_BOTTOM | OSD_ALIGN_LEFT, 0, 0,
+                               i_debut, i_fin );
+    }
+
+    vlc_object_release( p_vout );
+}
+
+unsigned short
+mediacontrol_sound_get_volume( mediacontrol_Instance *self,
+                               mediacontrol_Exception *exception )
+{
+    short retval;
+    audio_volume_t i_volume;
+
+    if( !self->p_intf )
+    {
+        RAISE( mediacontrol_InternalException, "No interface module" );
+        return 0;
+    }
+    aout_VolumeGet( self->p_intf, &i_volume );
+    retval = i_volume;
+    return retval;
+}
+
+void
+mediacontrol_sound_set_volume( mediacontrol_Instance *self,
+                               const unsigned short volume,
+                               mediacontrol_Exception *exception )
+{
+    if( !self->p_intf )
+    {
+        RAISE( mediacontrol_InternalException, "No interface module" );
+        return;
+    }
+    aout_VolumeSet( self->p_intf,( audio_volume_t )volume );
+}
+
+bool mediacontrol_set_visual(mediacontrol_Instance* self,
+			     WINDOWHANDLE visual_id,
+			     mediacontrol_Exception *exception)
+{
+    vlc_value_t value;
+    int ret;
+
+    if( !self->p_vlc )
+    {
+        RAISE( mediacontrol_InternalException, "No vlc reference" );
+        return 0;
+    }
+    value.i_int=visual_id;
+    ret = var_Set(self->p_vlc, "drawable", value);
+    
+    return (ret == VLC_SUCCESS);
+}

src/control/core.c

+/*****************************************************************************
+ * core.c: Core functions : init, playlist, stream management
+ *****************************************************************************
+ * Copyright (C) 2005 VideoLAN
+ * $Id: vlc.c 10786 2005-04-23 23:19:17Z zorglub $
+ *
+ * Authors: Olivier Aubert <olivier.aubert@liris.univ-lyon1.fr>
+ *
+ * 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., 59 Temple Place - Suite 330, Boston, MA  02111, USA.
+ *****************************************************************************/
+
+#include <vlc/control.h>
+
+#include <vlc/intf.h>
+#include <vlc/vout.h>
+#include <vlc/aout.h>
+#include <vlc_demux.h>
+
+#include <osd.h>
+
+#define HAS_SNAPSHOT 1
+
+#ifdef HAS_SNAPSHOT
+#include <snapshot.h>
+#endif
+
+#include <stdlib.h>                                      /* malloc(), free() */
+#include <string.h>
+
+#include <errno.h>                                                 /* ENOMEM */
+#include <stdio.h>
+#include <ctype.h>
+
+#ifdef HAVE_UNISTD_H
+#    include <unistd.h>
+#endif
+
+#ifdef HAVE_SYS_TIME_H
+#    include <sys/time.h>
+#endif
+#include <sys/types.h>
+
+#define RAISE( c, m )  exception->code = c; \
+                       exception->message = strdup(m);
+
+
+mediacontrol_Instance* mediacontrol_new_from_object( vlc_object_t* p_object,
+                                                     mediacontrol_Exception *exception )
+{
+    mediacontrol_Instance* retval;
+    vlc_object_t *p_vlc;
+
+    p_vlc = vlc_object_find( p_object, VLC_OBJECT_ROOT, FIND_PARENT );
+    if( ! p_vlc )
+    {
+        RAISE( mediacontrol_InternalException, "Unable to initialize VLC" );
+        return NULL;
+    }
+    retval = ( mediacontrol_Instance* )malloc( sizeof( mediacontrol_Instance ) );
+    retval->p_vlc = p_vlc;
+    retval->vlc_object_id = p_vlc->i_object_id;
+
+    /* We can keep references on these, which should not change. Is it true ? */
+    retval->p_playlist = vlc_object_find( p_vlc, VLC_OBJECT_PLAYLIST, FIND_ANYWHERE );
+    retval->p_intf = vlc_object_find( p_vlc, VLC_OBJECT_INTF, FIND_ANYWHERE );
+
+    if( ! retval->p_playlist || ! retval->p_intf )
+    {
+        RAISE( mediacontrol_InternalException, "No available interface" );
+        return NULL;