* @ingroup Media
*/
class GIFMetadataExtractor {
- static $gif_frame_sep;
- static $gif_extension_sep;
- static $gif_term;
+ /** @var string */
+ private static $gifFrameSep;
+
+ /** @var string */
+ private static $gifExtensionSep;
+
+ /** @var string */
+ private static $gifTerm;
const VERSION = 1;
/**
* @throws Exception
- * @param $filename string
+ * @param string $filename
* @return array
*/
static function getMetadata( $filename ) {
- self::$gif_frame_sep = pack( "C", ord( "," ) );
- self::$gif_extension_sep = pack( "C", ord( "!" ) );
- self::$gif_term = pack( "C", ord( ";" ) );
+ self::$gifFrameSep = pack( "C", ord( "," ) );
+ self::$gifExtensionSep = pack( "C", ord( "!" ) );
+ self::$gifTerm = pack( "C", ord( ";" ) );
$frameCount = 0;
$duration = 0.0;
// Skip over the GCT
self::readGCT( $fh, $bpp );
- while( !feof( $fh ) ) {
+ while ( !feof( $fh ) ) {
$buf = fread( $fh, 1 );
- if ( $buf == self::$gif_frame_sep ) {
+ if ( $buf == self::$gifFrameSep ) {
// Found a frame
$frameCount++;
self::readGCT( $fh, $bpp );
fread( $fh, 1 );
self::skipBlock( $fh );
- } elseif ( $buf == self::$gif_extension_sep ) {
+ } elseif ( $buf == self::$gifExtensionSep ) {
$buf = fread( $fh, 1 );
- if ( strlen( $buf ) < 1 ) throw new Exception( "Ran out of input" );
+ if ( strlen( $buf ) < 1 ) {
+ throw new Exception( "Ran out of input" );
+ }
$extension_code = unpack( 'C', $buf );
$extension_code = $extension_code[1];
fread( $fh, 1 ); // Transparency, disposal method, user input
$buf = fread( $fh, 2 ); // Delay, in hundredths of seconds.
- if ( strlen( $buf ) < 2 ) throw new Exception( "Ran out of input" );
+ if ( strlen( $buf ) < 2 ) {
+ throw new Exception( "Ran out of input" );
+ }
$delay = unpack( 'v', $buf );
$delay = $delay[1];
$duration += $delay * 0.01;
fread( $fh, 1 ); // Transparent colour index
$term = fread( $fh, 1 ); // Should be a terminator
- if ( strlen( $term ) < 1 ) throw new Exception( "Ran out of input" );
+ if ( strlen( $term ) < 1 ) {
+ throw new Exception( "Ran out of input" );
+ }
$term = unpack( 'C', $term );
$term = $term[1];
if ( $term != 0 ) {
// assume its that, otherwise assume its windows-1252 (iso-8859-1)
$dataCopy = $data;
// quickIsNFCVerify has the side effect of replacing any invalid characters
- UtfNormal::quickIsNFCVerify( $dataCopy );
+ UtfNormal\Validator::quickIsNFCVerify( $dataCopy );
if ( $dataCopy !== $data ) {
- wfSuppressWarnings();
+ MediaWiki\suppressWarnings();
$data = iconv( 'windows-1252', 'UTF-8', $data );
- wfRestoreWarnings();
+ MediaWiki\restoreWarnings();
}
$commentCount = count( $comment );
if ( $commentCount === 0
- || $comment[$commentCount - 1] !== $data )
- {
+ || $comment[$commentCount - 1] !== $data
+ ) {
// Some applications repeat the same comment on each
// frame of an animated GIF image, so if this comment
// is identical to the last, only extract once.
// Application extension (Netscape info about the animated gif)
// or XMP (or theoretically any other type of extension block)
$blockLength = fread( $fh, 1 );
- if ( strlen( $blockLength ) < 1 ) throw new Exception( "Ran out of input" );
+ if ( strlen( $blockLength ) < 1 ) {
+ throw new Exception( "Ran out of input" );
+ }
$blockLength = unpack( 'C', $blockLength );
$blockLength = $blockLength[1];
$data = fread( $fh, $blockLength );
if ( $blockLength != 11 ) {
- wfDebug( __METHOD__ . ' GIF application block with wrong length' );
- fseek( $fh, -($blockLength + 1), SEEK_CUR );
+ wfDebug( __METHOD__ . " GIF application block with wrong length\n" );
+ fseek( $fh, -( $blockLength + 1 ), SEEK_CUR );
self::skipBlock( $fh );
continue;
}
// Unsigned little-endian integer, loop count or zero for "forever"
$loopData = fread( $fh, 2 );
- if ( strlen( $loopData ) < 2 ) throw new Exception( "Ran out of input" );
+ if ( strlen( $loopData ) < 2 ) {
+ throw new Exception( "Ran out of input" );
+ }
$loopData = unpack( 'v', $loopData );
$loopCount = $loopData[1];
$xmp = self::readBlock( $fh, true );
if ( substr( $xmp, -257, 3 ) !== "\x01\xFF\xFE"
- || substr( $xmp, -4 ) !== "\x03\x02\x01\x00" )
- {
+ || substr( $xmp, -4 ) !== "\x03\x02\x01\x00"
+ ) {
// this is just a sanity check.
throw new Exception( "XMP does not have magic trailer!" );
}
// strip out trailer.
$xmp = substr( $xmp, 0, -257 );
-
} else {
// unrecognized extension block
- fseek( $fh, -($blockLength + 1), SEEK_CUR );
+ fseek( $fh, -( $blockLength + 1 ), SEEK_CUR );
self::skipBlock( $fh );
continue;
}
} else {
self::skipBlock( $fh );
}
- } elseif ( $buf == self::$gif_term ) {
+ } elseif ( $buf == self::$gifTerm ) {
break;
} else {
- if ( strlen( $buf ) < 1 ) throw new Exception( "Ran out of input" );
+ if ( strlen( $buf ) < 1 ) {
+ throw new Exception( "Ran out of input" );
+ }
$byte = unpack( 'C', $buf );
$byte = $byte[1];
throw new Exception( "At position: " . ftell( $fh ) . ", Unknown byte " . $byte );
}
/**
- * @param $fh
- * @param $bpp
+ * @param resource $fh
+ * @param int $bpp
* @return void
*/
static function readGCT( $fh, $bpp ) {
if ( $bpp > 0 ) {
- for( $i = 1; $i <= pow( 2, $bpp ); ++$i ) {
+ $max = pow( 2, $bpp );
+ for ( $i = 1; $i <= $max; ++$i ) {
fread( $fh, 3 );
}
}
}
/**
- * @param $data
+ * @param string $data
* @throws Exception
* @return int
*/
static function decodeBPP( $data ) {
- if ( strlen( $data ) < 1 ) throw new Exception( "Ran out of input" );
+ if ( strlen( $data ) < 1 ) {
+ throw new Exception( "Ran out of input" );
+ }
$buf = unpack( 'C', $data );
$buf = $buf[1];
$bpp = ( $buf & 7 ) + 1;
}
/**
- * @param $fh
+ * @param resource $fh
* @throws Exception
*/
static function skipBlock( $fh ) {
while ( !feof( $fh ) ) {
$buf = fread( $fh, 1 );
- if ( strlen( $buf ) < 1 ) throw new Exception( "Ran out of input" );
+ if ( strlen( $buf ) < 1 ) {
+ throw new Exception( "Ran out of input" );
+ }
$block_len = unpack( 'C', $buf );
$block_len = $block_len[1];
if ( $block_len == 0 ) {
* saying how long the sub-block is, followed by the sub-block.
* The entire block is terminated by a sub-block of length
* 0.
- * @param $fh FileHandle
- * @param $includeLengths Boolean Include the length bytes of the
+ * @param resource $fh File handle
+ * @param bool $includeLengths Include the length bytes of the
* sub-blocks in the returned value. Normally this is false,
* except XMP is weird and does a hack where you need to keep
* these length bytes.
$subLength = fread( $fh, 1 );
$blocks = 0;
- while( $subLength !== "\0" ) {
+ while ( $subLength !== "\0" ) {
$blocks++;
if ( $blocks > self::MAX_SUBBLOCKS ) {
throw new Exception( "MAX_SUBBLOCKS exceeded (over $blocks sub-blocks)" );
$data .= fread( $fh, ord( $subLength ) );
$subLength = fread( $fh, 1 );
}
+
return $data;
}
-
}
dépôts / lhc / web / wiklou.git / blobdiff