/package/app/app/alpha/apps/kaltura/lib/conversion/kConversionHelper.class.php

<?php
/**

 * Will hold severa helper functions common both to the client-side and the server side
 * 
 * @package Core
 * @subpackage Conversion
 * @deprecated

 */

class kConversionHelper

{

	const INDICATOR_SUFFIX = ".indicator";

	const INPROC_SUFFIX = ".inproc";

	

	public static function getExclusiveFile ( $path , $process_id = 1 , $log_number_of_files = false )

	{

		$indicators = glob ( $path . "/*" . self::INDICATOR_SUFFIX  );

		$count = count ( $indicators );

		if ( $count > 0 || $log_number_of_files )

		{

			TRACE ( "[" . $count . "] indicator in directory [" . $path . "]" );

		}

		

		if ( $indicators == null || count ( $indicators ) == 0 ) return null;

		

		foreach ( $indicators as $indicator )

		{

			$new_indicator = $indicator . "-{$process_id}";



			$move_res = @rename ( $indicator, $new_indicator );

			// only one server will actually move the indicator ... 

			if ( $move_res )

			{

				$file = str_replace ( kConversionCommand::INDICATOR_SUFFIX , ""  , $indicator );

				$file_name = basename ( $file );

				// now remove the indicator 

				//unlink( $new_indicator );

				// move to in-proc

				$in_proc = self::inProcFromIndicator ( $indicator );

				@rename ( $new_indicator ,  $in_proc );



				return array ( $file , $file_name , $in_proc );

			}

			else

			{

				TRACE ( "[$indicator] grabbed by other process");

			}

			

			// keep on trying ...

		}

		

		return null;

	}

		

	public static function inProcFromIndicator ( $full_file_path )

	{

		return str_replace ( self::INDICATOR_SUFFIX , self::INPROC_SUFFIX, $full_file_path );

	}



	public static function removeInProc ( $in_proc )

	{

		@unlink( $in_proc );

	}

	

	public static function createFileIndicator ( $full_file_path )

	{

		$path = $full_file_path . self::INDICATOR_SUFFIX ;

		if ( file_exists( $path ))

		{

			$content = file_get_contents( $path ); // sync - OK

			if ( is_numeric( $content ) )

				$content++;

			else

				$content = 1;

			file_put_contents( $path , $content ); // sync - OK

		}

		else

		{

			touch( $path );

			$content = "";

		}	

		return array ( $path , $content );	

	}

	

	public static function isFlv ( $full_file_path )

	{

		return myFlvStaticHandler::isFlv( $full_file_path );

	}

	

	

	public static function getFlvDuration ( $full_file_path )

	{

		return myFileConverter::getFlvDuration( $full_file_path );	

	}

	

	// will return an array  ( $width , $height )

	public static function getVideoDimensions ( $full_file_path )

	{

		return myFileConverter::getVideoDimensions( $full_file_path );	

	}



	// will return an array ( $found_video , $found_audio )

	public static function fileHasVideoAndAudio ( $full_file_path )

	{

		$audio = $video = true;

		$audio_video_status = myFileConverter::videoAudioStatus ( $full_file_path );

		if ( $audio_video_status == myFileConverter::VIDEO_ONLY ) $audio = false;

		elseif ( $audio_video_status == myFileConverter::AUDIO_ONLY ) $video = false;



		return array ( $video , $audio );

	}

	

	// return the full_file_path as if it was FLV

	public static function flvFileName ( $full_file_path )

	{

		$full_path = kFile::getFileNameNoExtension( $full_file_path , true ) . ".flv";

		return $full_path;

	}

	

	/*

	 * Will fill missing params from the conv_params according to data from the source_file

	 * 1. will check if the file is audio only

	 * 2. will check if the file is video only

	 * 3. will calculate the heigth from the width and the size of the source video depending on the aspect_radio 

	 */

	public static function fillConversionParams ( $source_file , kConversionParams $conv_params )

	{

		// check to see if audio or video should be set

		if ( $conv_params->audio === null || $conv_params->video === null )

		{

			list ( $video , $audio ) = self::fileHasVideoAndAudio ( $source_file );

			if ( $conv_params->audio === null ) $conv_params->audio = $audio;

			if ( $conv_params->video === null ) $conv_params->video = $video;

		}

		

		// if should use "aspect_ratio" but have no width - act as if "original_size" 

		if ( $conv_params->aspect_ratio == kConversionParams::CONV_PARAMS_ASPECT_RATIO_KEEP_ORIG_DIMENSIONS || 

			 ( $conv_params->aspect_ratio == kConversionParams::CONV_PARAMS_ASPECT_RATIO_KEEP_ORIG_RATIO &&  $conv_params->width == 0 ) 

			)

		{

			$conv_params->width = -1;

			$conv_params->height = -1;

			//list ( $conv_params->width , $conv_params->height ) = self::getVideoDimensions ( $source_file );

			// in this case we don't even need to pass the size 

			return;

		}



		if ( $conv_params->aspect_ratio == kConversionParams::CONV_PARAMS_ASPECT_RATIO_IGNORE )

		{

			// use the width & heigth from the params - IGNORE all the external requests 

		}

		elseif ( $conv_params->aspect_ratio == "" && $conv_params->height > 0 && $conv_params->width > 0 )

		{

			// leave untouched 

		}

		// if the aspect_ratio implies to keep the height - see if the height is 0 or not... 

		elseif ( $conv_params->height == 0 || 

			( 	$conv_params->aspect_ratio != kConversionParams::CONV_PARAMS_ASPECT_RATIO_KEEP_HEIGHT &&  

				$conv_params->aspect_ratio != kConversionParams::CONV_PARAMS_ASPECT_RATIO_KEEP_ORIG_DIMENSIONS )

			) // can be empty , null or 0

		{

			if ( $conv_params->aspect_ratio == kConversionParams::CONV_PARAMS_ASPECT_RATIO_KEEP_ORIG_RATIO )

			{

				list ( $video_width , $video_height ) = self::getVideoDimensions ( $source_file );

				

				if ( $video_height != 0 ) 

					$conv_params->height = self::calcHeight ( $conv_params->width , $video_width / $video_height );

				else

					$conv_params->height = 0;

			}

			elseif ( $conv_params->aspect_ratio == kConversionParams::CONV_PARAMS_ASPECT_RATIO_16_9 )

			{

				$conv_params->height = self::calcHeight ( $conv_params->width , ( 16/9 ) );

			}

		

			else //( $conv_params->aspect_ratio == kConversionParams::CONV_PARAMS_ASPECT_RATIO_4_3 )

			{

				// default is CONV_PARAMS_ASPECT_RATIO_4_3

				$conv_params->height = self::calcHeight ( $conv_params->width , ( 4/3 ) );

			}			

		}

		

		// make sure the width and heigth are even numbers

		if ( $conv_params->width % 2 == 1 ) $conv_params->width = $conv_params->width+1;

		if ( $conv_params->height % 2 == 1 ) $conv_params->height = $conv_params->height+1;

		

		// if by the end of all the calculations - still 0 or smaller - set to hard-coded defaults...

		if ( $conv_params->width <= 0 ) $conv_params->width = 400;

		if ( $conv_params->height <= 0 ) $conv_params->height = 300;

	}

	

	

	// TODO - extract all the data that might be required for fixing the prams

	protected static function getSourceInfo ( $source_file )

	{

			

	}

	

	protected static function calcHeight ( $width , $aspect_ratio )

	{

		if ( $aspect_ratio == 0 ) return $width;

		return  (int)( $width / $aspect_ratio );

	}

	

}
?>