vlcwrapper.cpp

VLC媒体播放程序

			*canSkipNext = pos < size - 1;
	}
}

void VlcWrapper::NavigatePrev()
{
	bool hasSkiped = false;

	// see if we have got a stream going		
	if ( p_input )
	{
		// get information from stream (lock it while looking at it)
		vlc_mutex_lock( &p_input->stream.stream_lock );

		int currentTitle = p_input->stream.p_selected_area->i_id;
		int currentChapter = p_input->stream.p_selected_area->i_part;
		int numTitles = p_input->stream.i_area_nb;
		bool hasTitles = numTitles > 1;
		int numChapters = p_input->stream.p_selected_area->i_part_nb;
		bool hasChapters = numChapters > 1;

		vlc_mutex_unlock( &p_input->stream.stream_lock );

		// first, look for chapters
		if ( hasChapters )
		{
			// skip to the previous chapter
			currentChapter--;

			if ( currentChapter >= 0 )
			{
				ToggleChapter( currentChapter );
				hasSkiped = true;
			}
		}
		// if we couldn't skip chapters, try titles instead
		if ( !hasSkiped && hasTitles )
		{
			// skip to the previous title
			currentTitle--;
			// disallow area 0 since it is used for video_ts.vob
			if( currentTitle > 0 )
			{
				ToggleTitle(currentTitle);
				hasSkiped = true;
			}
		}

	}
	// last but not least, skip to previous file
	if ( !hasSkiped )
		PlaylistPrev();
}

void VlcWrapper::NavigateNext()
{
	bool hasSkiped = false;

	// see if we have got a stream going		
	if ( p_input )
	{
		// get information from stream (lock it while looking at it)
		vlc_mutex_lock( &p_input->stream.stream_lock );

		int currentTitle = p_input->stream.p_selected_area->i_id;
		int currentChapter = p_input->stream.p_selected_area->i_part;
		int numTitles = p_input->stream.i_area_nb;
		bool hasTitles = numTitles > 1;
		int numChapters = p_input->stream.p_selected_area->i_part_nb;
		bool hasChapters = numChapters > 1;

		vlc_mutex_unlock( &p_input->stream.stream_lock );

		// first, look for chapters
		if ( hasChapters )
		{
			// skip to the next chapter
			currentChapter++;
			if ( currentChapter < numChapters )
			{
				ToggleChapter( currentChapter );
				hasSkiped = true;
			}
		}
		// if we couldn't skip chapters, try titles instead
		if ( !hasSkiped && hasTitles )
		{
			// skip to the next title
			currentTitle++;
			// disallow area 0 since it is used for video_ts.vob
			if ( currentTitle < numTitles - 1 )
			{
				ToggleTitle(currentTitle);
				hasSkiped = true;
			}
		}

	}
	// last but not least, skip to next file
	if ( !hasSkiped )
		PlaylistNext();
}

/*************************
 * Playlist manipulation *
 *************************/

// PlaylistLock
bool
VlcWrapper::PlaylistLock() const
{
// TODO: search and destroy -> deadlock!
return true;
	if ( p_playlist )
	{
 		vlc_mutex_lock( &p_playlist->object_lock );
 		return true;
 	}
 	return false;
}

// PlaylistUnlock
void
VlcWrapper::PlaylistUnlock() const
{
// TODO: search and destroy -> deadlock!
return;
	vlc_mutex_unlock( &p_playlist->object_lock );
}

// PlaylistItemAt
void*
VlcWrapper::PlaylistItemAt( int index ) const
{
	playlist_item_t* item = NULL;
	if ( index >= 0 && index < p_playlist->i_size )
		item = p_playlist->pp_items[index];
	return (void*)item;
}

// PlaylistRemoveItem
void*
VlcWrapper::PlaylistRemoveItem( int index ) const
{
	playlist_item_t* copy = NULL;
	// check if item exists at the provided index
	if ( index >= 0 && index < p_playlist->i_size )
	{
		playlist_item_t* item = p_playlist->pp_items[index];
		if ( item )
		{
			// make a copy of the removed item
			copy = (playlist_item_t*)PlaylistCloneItem( (void*)item );
			// remove item from playlist (unfortunately, this frees it)
			playlist_Delete( p_playlist, index );
		}
	}
	return (void*)copy;
}

// PlaylistRemoveItem
void*
VlcWrapper::PlaylistRemoveItem( void* item ) const
{
	playlist_item_t* copy = NULL;
	for ( int32 i = 0; i < p_playlist->i_size; i++ )
	{
		if ( p_playlist->pp_items[i] == item )
		{
			copy = (playlist_item_t*)PlaylistRemoveItem( i );
			break;
		}
	}
	return (void*)copy;
}

// PlaylistAddItem
bool
VlcWrapper::PlaylistAddItem( void* item, int index ) const
{
	if ( item )
	{
		playlist_AddItem( p_playlist, (playlist_item_t*)item,
						  PLAYLIST_INSERT, index );
	}
	// TODO: once playlist is returning useful info, return that instead
	return true;
}

// PlaylistCloneItem
void*
VlcWrapper::PlaylistCloneItem( void* castToItem ) const
{
	playlist_item_t* copy = NULL;
	playlist_item_t* item = (playlist_item_t*)castToItem;
	if ( item )
	{
		copy = (playlist_item_t*)malloc( sizeof( playlist_item_t ) );
		if ( copy )
		{
			// make a copy of the item at index
                        *copy = *item;
			copy->psz_name = strdup( item->psz_name );
			copy->psz_uri  = strdup( item->psz_uri );
		}
	}
	return (void*)copy;
}

// Careful! You need to know what you're doing here!
// The reason for having it, is to be able to deal with
// the rather lame list implementation of the playlist.
// It is meant to help manipulate the playlist with the above
// methods while keeping it valid.
//
// PlaylistSetPlaying
void
VlcWrapper::PlaylistSetPlaying( int index ) const
{
	if ( index < 0 )
		index = 0;
	if ( index >= p_playlist->i_size )
		index = p_playlist->i_size - 1;
	p_playlist->i_index = index;
}


/*********
 * audio *
 *********/

unsigned short VlcWrapper::GetVolume()
{
    unsigned short i_volume;
    aout_VolumeGet( p_intf, (audio_volume_t*)&i_volume );
    return i_volume;
}

void VlcWrapper::SetVolume( int value )
{
    if ( p_intf->p_sys->b_mute )
    {
        p_intf->p_sys->b_mute = 0;
    }
    aout_VolumeSet( p_intf, value );
}

void VlcWrapper::VolumeMute()
{
    aout_VolumeMute( p_intf, NULL );
    p_intf->p_sys->b_mute = 1;
}

void VlcWrapper::VolumeRestore()
{
    audio_volume_t dummy;
    aout_VolumeMute( p_intf, &dummy );
    p_intf->p_sys->b_mute = 0;
}

bool VlcWrapper::IsMuted()
{
    return p_intf->p_sys->b_mute;
}

/*******
 * DVD *
 *******/

bool VlcWrapper::IsUsingMenus()
{
    if( !p_input )
        return false;

    vlc_mutex_lock( &p_playlist->object_lock );
    if( p_playlist->i_index < 0 )
    {
        vlc_mutex_unlock( &p_playlist->object_lock );
        return false;
    }
    
    char * psz_name = p_playlist->pp_items[p_playlist->i_index]->psz_name;
    if( !strncmp( psz_name, "dvdplay:", 8 ) )
    {
        vlc_mutex_unlock( &p_playlist->object_lock );
        return true;
    }
    vlc_mutex_unlock( &p_playlist->object_lock );

    return false;
}

bool VlcWrapper::HasTitles()
{
    if( !p_input )
        return false;

    return ( p_input->stream.i_area_nb > 1 );
}

BList * VlcWrapper::GetTitles()
{
    if( p_input )
    {
        vlc_mutex_lock( &p_input->stream.stream_lock );
      
        BList *list = new BList( p_input->stream.i_area_nb );
        BMenuItem *menuItem;
        BMessage *message;
        
        for( unsigned int i = 1; i < p_input->stream.i_area_nb; i++ )
        {
            message = new BMessage( TOGGLE_TITLE );
            message->AddInt32( "index", i );
            BString helper( "" );
            helper << i;
            menuItem = new BMenuItem( helper.String(), message );
            menuItem->SetMarked( p_input->stream.p_selected_area->i_id == i );
            list->AddItem( menuItem );
        }
        
        vlc_mutex_unlock( &p_input->stream.stream_lock );

        return list;
    }
    return NULL;
}

void VlcWrapper::PrevTitle()
{
    int i_id;
    i_id = p_input->stream.p_selected_area->i_id - 1;
    if( i_id > 0 )
    {
        ToggleTitle(i_id);
    }
}

void VlcWrapper::NextTitle()
{
    unsigned int i_id;
    i_id = p_input->stream.p_selected_area->i_id + 1;
    if( i_id < p_input->stream.i_area_nb )
    {
        ToggleTitle(i_id);
    }
}

void VlcWrapper::ToggleTitle(int i_title)
{
    if( p_input != NULL )
    {
        input_ChangeArea( p_input,
                          p_input->stream.pp_areas[i_title] );

        vlc_mutex_lock( &p_input->stream.stream_lock );

        vlc_mutex_unlock( &p_input->stream.stream_lock );
    }
}

void VlcWrapper::TitleInfo( int32 &currentIndex, int32 &maxIndex )
{
	currentIndex = -1;
	maxIndex = -1;
	if ( p_input )
	{
		vlc_mutex_lock( &p_input->stream.stream_lock );

		maxIndex = p_input->stream.i_area_nb - 1;
		if ( maxIndex > 0)
			currentIndex = p_input->stream.p_selected_area->i_id;
		else
			maxIndex = -1;

		vlc_mutex_unlock( &p_input->stream.stream_lock );
	}
}

bool VlcWrapper::HasChapters()
{
    if( !p_input )
    {
        return false;
    }
    return ( p_input->stream.p_selected_area->i_part_nb > 1 );
}

BList * VlcWrapper::GetChapters()
{
    if( p_input )
    {
        vlc_mutex_lock( &p_input->stream.stream_lock );
      
        BList *list = new BList( p_input->stream.p_selected_area->i_part_nb );
        BMenuItem *menuItem;
        BMessage *message;
        
        for( unsigned int i = 1;
             i < p_input->stream.p_selected_area->i_part_nb + 1; i++ )
        {
            message = new BMessage( TOGGLE_CHAPTER );
            message->AddInt32( "index", i );
            BString helper( "" );
            helper << i;
            menuItem = new BMenuItem( helper.String(), message );
            menuItem->SetMarked( p_input->stream.p_selected_area->i_part == i );
            list->AddItem( menuItem );
        }
        
        vlc_mutex_unlock( &p_input->stream.stream_lock );

        return list;
    }
    return NULL;
}

void VlcWrapper::PrevChapter()
{
    int i_id;
    i_id = p_input->stream.p_selected_area->i_part - 1;
    if( i_id >= 0 )
    {
        ToggleChapter(i_id);
    }
}

void VlcWrapper::NextChapter()
{
    int i_id;
    i_id = p_input->stream.p_selected_area->i_part + 1;
    if( i_id >= 0 )
    {
        ToggleChapter(i_id);
    }
}

void VlcWrapper::ToggleChapter(int i_chapter)
{
    if( p_input != NULL )
    {
        p_input->stream.p_selected_area->i_part = i_chapter;
        input_ChangeArea( p_input,
                          p_input->stream.p_selected_area );

        vlc_mutex_lock( &p_input->stream.stream_lock );
        vlc_mutex_unlock( &p_input->stream.stream_lock );
    }
}

void VlcWrapper::ChapterInfo( int32 &currentIndex, int32 &maxIndex )
{
	currentIndex = -1;
	maxIndex = -1;
	if ( p_input )
	{
		vlc_mutex_lock( &p_input->stream.stream_lock );

		maxIndex = p_input->stream.p_selected_area->i_part_nb - 1;
		if ( maxIndex > 0)
			currentIndex = p_input->stream.p_selected_area->i_part;
		else
			maxIndex = -1;

		vlc_mutex_unlock( &p_input->stream.stream_lock );
	}
}

/****************
 * Miscellanous *
 ****************/
 
void VlcWrapper::LoadSubFile( const char * psz_file )
{
    config_PutPsz( p_intf, "sub-file", strdup( psz_file ) );
}

void VlcWrapper::FilterChange()
{
    if( !p_input )
        return;
    
    vout_thread_t * p_vout;
    vlc_mutex_lock( &p_input->stream.stream_lock );

    // Warn the vout we are about to change the filter chain
    p_vout = (vout_thread_t*)vlc_object_find( p_intf, VLC_OBJECT_VOUT,
                                              FIND_ANYWHERE );
    if( p_vout )
    {
        p_vout->b_filter_change = VLC_TRUE;
        vlc_object_release( p_vout );
    }

    // restart all video stream
    for( unsigned int i = 0; i < p_input->stream.i_es_number; i++ )
    {
        if( ( p_input->stream.pp_es[i]->i_cat == VIDEO_ES ) &&
            ( p_input->stream.pp_es[i]->p_dec != NULL ) )
        {
            input_UnselectES( p_input, p_input->stream.pp_es[i] );
            input_SelectES( p_input, p_input->stream.pp_es[i] );
        }
    }
    vlc_mutex_unlock( &p_input->stream.stream_lock );
}