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<?php
/**
* WebM handler
*/
class WebMHandler extends ID3Handler {
/**
* @param $path string
* @return array
*/
protected function getID3( $path ) {
$id3 = parent::getID3( $path );
// Unset some parts of id3 that are too detailed and matroska specific:
unset( $id3['matroska'] );
return $id3;
}
/**
* Get the "media size"
* @param $file File
* @param $path string
* @param $metadata bool
* @return array|bool
*/
function getImageSize( $file, $path, $metadata = false ) {
// Just return the size of the first video stream
if ( $metadata === false ) {
$metadata = $file->getMetadata();
}
$metadata = $this->unpackMetadata( $metadata );
if ( isset( $metadata['error'] ) ) {
return false;
}
$size = array( false, false );
// display_x/display_y is only set if DisplayUnit
// is pixels, otherwise display_aspect_ratio is set
if ( isset( $metadata['video']['display_x'] )
&&
isset( $metadata['video']['display_y'] )
){
$size = array (
$metadata['video']['display_x'],
$metadata['video']['display_y']
);
}
elseif ( isset( $metadata['video']['resolution_x'] )
&&
isset( $metadata['video']['resolution_y'] )
){
$size = array (
$metadata['video']['resolution_x'],
$metadata['video']['resolution_y']
);
if ( isset($metadata['video']['crop_top']) ) {
$size[1] -= $metadata['video']['crop_top'];
}
if ( isset($metadata['video']['crop_bottom']) ) {
$size[1] -= $metadata['video']['crop_bottom'];
}
if ( isset($metadata['video']['crop_left']) ) {
$size[0] -= $metadata['video']['crop_left'];
}
if ( isset($metadata['video']['crop_right']) ) {
$size[0] -= $metadata['video']['crop_right'];
}
}
if ( $size[0] && $size[1] && isset( $metadata['video']['display_aspect_ratio'] ) ) {
//for wide images (i.e. 16:9) take native height as base
if ( $metadata['video']['display_aspect_ratio'] >= 1 ) {
$size[0] = intval( $size[1] * $metadata['video']['display_aspect_ratio'] );
} else { //for tall images (i.e. 9:16) take width as base
$size[1] = intval( $size[0] / $metadata['video']['display_aspect_ratio'] );
}
}
return $size;
}
/**
* @param $file
* @return string
*/
function getMetadataType( $file ) {
return 'webm';
}
/**
* @param $file File
* @return String
*/
function getWebType( $file ) {
$baseType = ( $file->getWidth() == 0 && $file->getHeight() == 0 )? 'audio' : 'video';
$streams = $this->getStreamTypes( $file );
if ( !$streams ) {
return $baseType . '/webm';
}
$codecs = strtolower( implode( ', ', $streams ) );
return $baseType . '/webm; codecs="' . $codecs . '"';
}
/**
* @param $file File
* @return array|bool
*/
function getStreamTypes( $file ) {
$streamTypes = array();
$metadata = $this->unpackMetadata( $file->getMetadata() );
if ( !$metadata || isset( $metadata['error'] ) ) {
return false;
}
// id3 gives 'V_VP8' for what we call VP8
if( isset( $metadata['video'] ) && $metadata['video']['dataformat'] == 'vp8' ){
$streamTypes[] = 'VP8';
} elseif( isset( $metadata['video'] ) &&
( $metadata['video']['dataformat'] === 'vp9'
|| $metadata['video']['dataformat'] === 'V_VP9'
) ) {
// Currently getID3 calls it V_VP9. That will probably change to vp9
// once getID3 actually gets support for the codec.
$streamTypes[] = 'VP9';
}
if( isset( $metadata['audio'] ) && $metadata['audio']['dataformat'] == 'vorbis' ){
$streamTypes[] = 'Vorbis';
} elseif ( isset( $metadata['audio'] ) &&
( $metadata['audio']['dataformat'] == 'opus'
|| $metadata['audio']['dataformat'] == 'A_OPUS'
) ) {
// Currently getID3 calls it A_OPUS. That will probably change to 'opus'
// once getID3 actually gets support for the codec.
$streamTypes[] = 'Opus';
}
return $streamTypes;
}
/**
* @param $file File
* @return String
*/
function getShortDesc( $file ) {
global $wgLang;
$streamTypes = $this->getStreamTypes( $file );
if ( !$streamTypes ) {
return parent::getShortDesc( $file );
}
return wfMessage( 'timedmedia-webm-short-video', implode( '/', $streamTypes ),
$wgLang->formatTimePeriod( $this->getLength( $file ) ) )->text();
}
/**
* @param $file File
* @return String
*/
function getLongDesc( $file ) {
global $wgLang;
$streamTypes = $this->getStreamTypes( $file );
if ( !$streamTypes ) {
return parent::getLongDesc( $file );
}
return wfMessage('timedmedia-webm-long-video',
implode( '/', $streamTypes ),
$wgLang->formatTimePeriod( $this->getLength($file) ),
$wgLang->formatBitrate( $this->getBitRate( $file ) )
)->numParams(
$file->getWidth(),
$file->getHeight()
)->text();
}
}
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