vlcwrapper.cpp

VLC媒体播放程序

/*****************************************************************************
 * VlcWrapper.cpp: BeOS plugin for vlc (derived from MacOS X port)
 *****************************************************************************
 * Copyright (C) 2001 VideoLAN
 * $Id: VlcWrapper.cpp,v 1.42 2004/01/17 12:28:57 gbazin Exp $
 *
 * Authors: Florian G. Pflug <[e-mail]>
 *          Jon Lech Johansen <[e-mail]>
 *          Tony Casltey <[e-mail]>
 *          Stephan Aßmus <[e-mail]>
 *          Eric Petit <[e-mail]>
 *
 * 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 <AppKit.h>
#include <InterfaceKit.h>
#include <SupportKit.h>

#include <vlc/vlc.h>
#include <vlc/intf.h>
#include <vlc/vout.h>
extern "C"
{
  #include <input_ext-plugins.h> // needed here when compiling without plugins
  #include <audio_output.h>
  #include <aout_internal.h>
}

#include "VlcWrapper.h"
#include "MsgVals.h"

const char * _AddEllipsis( char * string )
{
    char * temp;
    temp = (char*) calloc( strlen( string ) + 4, 1 );
    sprintf( temp, "%s%s", string, B_UTF8_ELLIPSIS );
    return temp;
}

/* constructor */
VlcWrapper::VlcWrapper( intf_thread_t *p_interface )
{
    p_intf = p_interface;
    p_input = NULL;
    p_playlist = (playlist_t *)vlc_object_find( p_intf, VLC_OBJECT_PLAYLIST,
                                                FIND_ANYWHERE );
}

/* destructor */
VlcWrapper::~VlcWrapper()
{
    if( p_input )
        vlc_object_release( p_input );

    if( p_playlist )
        vlc_object_release( p_playlist );
}

/* UpdateInput: updates p_input */
void VlcWrapper::UpdateInput()
{
    if( !p_input )
        p_input = (input_thread_t *)vlc_object_find( p_intf, VLC_OBJECT_INPUT,
                                                     FIND_ANYWHERE );
        
    if( p_input )
        if( p_input->b_dead )
        {
            vlc_object_release( p_input );
            p_input = NULL;
        }
}


/***************************
 * input infos and control *
 ***************************/

bool VlcWrapper::HasInput()
{
    return ( p_input != NULL );
}

int VlcWrapper::InputStatus()
{
    if( !p_input )
    {
        return UNDEF_S;
    }
    
    vlc_value_t state;
    var_Get( p_input, "state", &state );
    return state.i_int;
}

int VlcWrapper::InputRate()
{
    if( !p_input )
    {
        return DEFAULT_RATE;
    }
    
    return p_input->stream.control.i_rate;
}

void VlcWrapper::InputSetRate( int rate )
{
    if( !p_input )
    {
        return;
    }

    input_SetRate( p_input, rate );
}

BList * VlcWrapper::GetChannels( int i_cat )
{
    if( p_input )
    {
        unsigned int i;
        uint32 what;
        const char* fieldName;

        switch( i_cat )
        {
            case AUDIO_ES:
            {
                what = SELECT_CHANNEL;
                fieldName = "channel";
                break;
            }
            case SPU_ES:
            {
                what = SELECT_SUBTITLE;
                fieldName = "subtitle";
                break;
            }
            default:
            return NULL;
       }

        vlc_mutex_lock( &p_input->stream.stream_lock );
      
        /* find which track is currently playing */
        es_descriptor_t *p_es = NULL;
        for( i = 0; i < p_input->stream.i_selected_es_number; i++ )
        {
            if( p_input->stream.pp_selected_es[i]->i_cat == i_cat )
                p_es = p_input->stream.pp_selected_es[i];
        }
        
        /* build a list of all tracks */
        BList *list = new BList( p_input->stream.i_es_number );
        BMenuItem *menuItem;
        BMessage *message;
        char *trackName;
        
        /* "None" */
        message = new BMessage( what );
        message->AddInt32( fieldName, -1 );
        menuItem = new BMenuItem( _("None"), message );
        if( !p_es )
            menuItem->SetMarked( true );
        list->AddItem( menuItem );
        
        for( i = 0; i < p_input->stream.i_es_number; i++ )
        {
            if( p_input->stream.pp_es[i]->i_cat == i_cat )
            {
                message = new BMessage( what );
                message->AddInt32( fieldName, i );
                if( !p_input->stream.pp_es[i]->psz_desc ||
                    !*p_input->stream.pp_es[i]->psz_desc )
                    trackName = _("<unknown>");
                else
                    trackName = strdup( p_input->stream.pp_es[i]->psz_desc );
                menuItem = new BMenuItem( trackName, message );
                if( p_input->stream.pp_es[i] == p_es )
                    menuItem->SetMarked( true );
                list->AddItem( menuItem );
            }
        }
        
        vlc_mutex_unlock( &p_input->stream.stream_lock );

        return list;
    }
    return NULL;
}

void VlcWrapper::ToggleLanguage( int i_language )
{
    es_descriptor_t * p_es = NULL;
    es_descriptor_t * p_es_old = NULL;

    vlc_mutex_lock( &p_input->stream.stream_lock );
    for( unsigned int i = 0; i < p_input->stream.i_selected_es_number ; i++ )
    {
        if( p_input->stream.pp_selected_es[i]->i_cat == AUDIO_ES )
        {
            p_es_old = p_input->stream.pp_selected_es[i];
            break;
        }
    }
    vlc_mutex_unlock( &p_input->stream.stream_lock );
    
    if( i_language != -1 )
    {
        p_es = p_input->stream.pp_es[i_language];
    }
    if( p_es == p_es_old )
    {
        return;
    }
    if( p_es_old )
    {
        input_ToggleES( p_input, p_es_old, VLC_FALSE );
    }
    if( p_es )
    {
        input_ToggleES( p_input, p_es, VLC_TRUE );
    }
}

void VlcWrapper::ToggleSubtitle( int i_subtitle )
{
    es_descriptor_t * p_es = NULL;
    es_descriptor_t * p_es_old = NULL;

    vlc_mutex_lock( &p_input->stream.stream_lock );
    for( unsigned int i = 0; i < p_input->stream.i_selected_es_number ; i++ )
    {
        if( p_input->stream.pp_selected_es[i]->i_cat == SPU_ES )
        {
            p_es_old = p_input->stream.pp_selected_es[i];
            break;
        }
    }
    vlc_mutex_unlock( &p_input->stream.stream_lock );
    
    if( i_subtitle != -1 )
    {
        p_es = p_input->stream.pp_es[i_subtitle];
    }
    if( p_es == p_es_old )
    {
        return;
    }
    if( p_es_old )
    {
        input_ToggleES( p_input, p_es_old, VLC_FALSE );
    }
    if( p_es )
    {
        input_ToggleES( p_input, p_es, VLC_TRUE );
    }
}

const char * VlcWrapper::GetTimeAsString()
{
    static char psz_time[ MSTRTIME_MAX_SIZE ];
        
    if( !p_input )
    {
        return ("-:--:--");
    }     
   
    vlc_value_t time;
    var_Get( p_input, "time", &time );
    
    mtime_t seconds = time.i_time / 1000000;
    sprintf( psz_time, "%d:%02d:%02d",
             (int) ( seconds / (60 * 60 ) ),
             (int) ( ( seconds / 60 ) % 60 ),
             (int) ( seconds % 60 ) );

    return psz_time;
}

float VlcWrapper::GetTimeAsFloat()
{
    if( !p_input )
    {
        return 0.0;
    }
    
    vlc_value_t pos;
    var_Get( p_input, "position", &pos );
    return pos.f_float;
}

void VlcWrapper::SetTimeAsFloat( float f_position )
{
    if( !p_input )
    {
        return;
    }
    
    vlc_value_t pos;
    pos.f_float = f_position / SEEKSLIDER_RANGE;
    var_Set( p_input, "position", pos );
}

bool VlcWrapper::IsPlaying()
{
	bool playing = false;
	if( p_input )
	{
		switch( p_input->stream.control.i_status )
		{
			case PLAYING_S:
			case FORWARD_S:
			case BACKWARD_S:
				playing = true;
	            break;
			case PAUSE_S:
			case UNDEF_S:
			default:
				break;
		}
	}
	return playing;

}

/************
 * playlist *
 ************/

void VlcWrapper::OpenFiles( BList* o_files, bool replace, int32 index )
{
	if ( o_files && o_files->CountItems() > 0)
	{
	    int size = PlaylistSize();
		bool wasEmpty = ( size < 1 );
		if ( index == -1 )
			index = PLAYLIST_END;
		int mode = index == PLAYLIST_END ? PLAYLIST_APPEND : PLAYLIST_INSERT;
	
	    /* delete current playlist */
	    if( replace )
	    {
	        for( int i = 0; i < size; i++ )
	        {
	            playlist_Delete( p_playlist, 0 );
	        }
	    }
	
	    /* insert files */
	    int32 count = o_files->CountItems();
	    for ( int32 i = count - 1; i >= 0; i-- )
	    {
	    	if ( BString* o_file = (BString *)o_files->RemoveItem( i ) )
	    	{
		        playlist_Add( p_playlist, o_file->String(),
				      o_file->String(), mode, index );
		        if ( mode == PLAYLIST_INSERT )
		        	index++;
		        delete o_file;
	    	}
	    }
	    // TODO: implement a user setting
	    // if to start automatically
	    /* eventually restart playing */
	    if( replace || wasEmpty )
	    {
	        playlist_Stop( p_playlist );
	        playlist_Play( p_playlist );
	    }
	}
}
 
void VlcWrapper::OpenDisc(BString o_type, BString o_device, int i_title, int i_chapter)
{
    if( config_GetInt( p_intf, "beos-dvdmenus" ) )
        o_device.Prepend( "dvdplay:" );
    else
        o_device.Prepend( "dvdold:" );
    playlist_Add( p_playlist, o_device.String(), o_device.String(),
                  PLAYLIST_APPEND | PLAYLIST_GO, PLAYLIST_END );
}

int VlcWrapper::PlaylistSize()
{
    vlc_mutex_lock( &p_playlist->object_lock );
    int i_size = p_playlist->i_size;
    vlc_mutex_unlock( &p_playlist->object_lock );
    return i_size;
}

char * VlcWrapper::PlaylistItemName( int i )
{
   return p_playlist->pp_items[i]->psz_name;
}

int VlcWrapper::PlaylistCurrent()
{
    return p_playlist->i_index;
}

bool VlcWrapper::PlaylistPlay()
{
    if( PlaylistSize() )
    {
        playlist_Play( p_playlist );
    }
    return( true );
}

void VlcWrapper::PlaylistPause()
{
    if( p_input )
    {
        input_SetStatus( p_input, INPUT_STATUS_PAUSE );
    }
}

void VlcWrapper::PlaylistStop()
{
    playlist_Stop( p_playlist );
}

void VlcWrapper::PlaylistNext()
{
    playlist_Next( p_playlist );
}

void VlcWrapper::PlaylistPrev()
{
    playlist_Prev( p_playlist );
}

void VlcWrapper::GetPlaylistInfo( int32& currentIndex, int32& maxIndex )
{
	currentIndex = -1;
	maxIndex = -1;
	if ( p_playlist )
	{
	    vlc_mutex_lock( &p_playlist->object_lock );

		maxIndex = p_playlist->i_size;
		if ( maxIndex > 0 )
			currentIndex = p_playlist->i_index/* + 1 -> why?!?*/;
		else
			maxIndex = -1;

	    vlc_mutex_unlock( &p_playlist->object_lock );
	}
}

void VlcWrapper::PlaylistJumpTo( int pos )
{
    playlist_Goto( p_playlist, pos );
}

void VlcWrapper::GetNavCapabilities( bool *canSkipPrev, bool *canSkipNext )
{
	if ( canSkipPrev && canSkipNext )
	{
		// init the parameters
		*canSkipPrev = false;
		*canSkipNext = false;
		// get playlist info
		int pos = PlaylistCurrent();
		int size = PlaylistSize();

		// see if we have got a stream going		
		if ( p_input )
		{
			vlc_mutex_lock( &p_input->stream.stream_lock );

			bool hasTitles = p_input->stream.i_area_nb > 1;
			int numChapters = p_input->stream.p_selected_area->i_part_nb;
			bool hasChapters = numChapters > 1;
			// first, look for chapters
			if ( hasChapters )
			{
				*canSkipPrev = p_input->stream.p_selected_area->i_part > 0;
				*canSkipNext = p_input->stream.p_selected_area->i_part <
									 p_input->stream.p_selected_area->i_part_nb - 1;
			}
			// if one of the skip capabilities is false,
			// make it depend on titles instead
			if ( !*canSkipPrev && hasTitles )
				*canSkipPrev = p_input->stream.p_selected_area->i_id > 1;
			if ( !*canSkipNext && hasTitles )
				*canSkipNext = p_input->stream.p_selected_area->i_id <
				                   p_input->stream.i_area_nb - 1;

			vlc_mutex_unlock( &p_input->stream.stream_lock );
		}
		// last but not least, make capabilities depend on playlist
		if ( !*canSkipPrev )
			*canSkipPrev = pos > 0;
		if ( !*canSkipNext )