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<?php

// SPDX-FileCopyrightText: 2004-2023 Ryan Parman, Sam Sneddon, Ryan McCue
// SPDX-License-Identifier: BSD-3-Clause

declare(strict_types=1);

namespace SimplePie;

/**
 * Handles everything related to enclosures (including Media RSS and iTunes RSS)
 *
 * Used by {@see \SimplePie\Item::get_enclosure()} and {@see \SimplePie\Item::get_enclosures()}
 *
 * This class can be overloaded with {@see \SimplePie\SimplePie::set_enclosure_class()}
 */
class Enclosure
{
    /**
     * @var ?string
     * @see get_bitrate()
     */
    public $bitrate;

/**
     * @var Caption[]|null
     * @see get_captions()
     */
    public $captions;

/**
     * @var Category[]|null
     * @see get_categories()
     */
    public $categories;

/**
     * @var ?int
     * @see get_channels()
     */
    public $channels;

/**
     * @var ?Copyright
     * @see get_copyright()
     */
    public $copyright;

/**
     * @var Credit[]|null
     * @see get_credits()
     */
    public $credits;

/**
     * @var ?string
     * @see get_description()
     */
    public $description;

/**
     * @var ?int
     * @see get_duration()
     */
    public $duration;

/**
     * @var ?string
     * @see get_expression()
     */
    public $expression;

/**
     * @var ?string
     * @see get_framerate()
     */
    public $framerate;

/**
     * @var ?string
     * @see get_handler()
     */
    public $handler;

/**
     * @var string[]|null
     * @see get_hashes()
     */
    public $hashes;

/**
     * @var ?string
     * @see get_height()
     */
    public $height;

/**
     * @deprecated
     * @var null
     */
    public $javascript;

/**
     * @var string[]|null
     * @see get_keywords()
     */
    public $keywords;

/**
     * @var ?string
     * @see get_language()
     */
    public $lang;

/**
     * @var ?int
     * @see get_length()
     */
    public $length;

/**
     * @var ?string
     * @see get_link()
     */
    public $link;

/**
     * @var ?string
     * @see get_medium()
     */
    public $medium;

/**
     * @var ?string
     * @see get_player()
     */
    public $player;

/**
     * @var Rating[]|null
     * @see get_ratings()
     */
    public $ratings;

/**
     * @var ?Restriction[]
     * @see get_restrictions()
     */
    public $restrictions;

/**
     * @var ?string
     * @see get_sampling_rate()
     */
    public $samplingrate;

/**
     * @var string[]|null
     * @see get_thumbnails()
     */
    public $thumbnails;

/**
     * @var ?string
     * @see get_title()
     */
    public $title;

/**
     * @var ?string
     * @see get_type()
     */
    public $type;

/**
     * @var ?string
     * @see get_width()
     */
    public $width;

/**
     * Constructor, used to input the data
     *
     * For documentation on all the parameters, see the corresponding
     * properties and their accessors
     *
     * @uses idn_to_ascii If available, this will convert an IDN
     *
     * @param null $javascript
     * @param Caption[]|null $captions
     * @param Category[]|null $categories
     * @param Credit[]|null $credits
     * @param string[]|null $hashes
     * @param string[]|null $keywords
     * @param Rating[]|null $ratings
     * @param Restriction[]|null $restrictions
     * @param string[]|null $thumbnails
     */
    public function __construct(
        ?string $link = null,
        ?string $type = null,
        ?int $length = null,
        $javascript = null,
        ?string $bitrate = null,
        ?array $captions = null,
        ?array $categories = null,
        ?int $channels = null,
        ?Copyright $copyright = null,
        ?array $credits = null,
        ?string $description = null,
        ?int $duration = null,
        ?string $expression = null,
        ?string $framerate = null,
        ?array $hashes = null,
        ?string $height = null,
        ?array $keywords = null,
        ?string $lang = null,
        ?string $medium = null,
        ?string $player = null,
        ?array $ratings = null,
        ?array $restrictions = null,
        ?string $samplingrate = null,
        ?array $thumbnails = null,
        ?string $title = null,
        ?string $width = null
    ) {
        $this->bitrate = $bitrate;
        $this->captions = $captions;
        $this->categories = $categories;
        $this->channels = $channels;
        $this->copyright = $copyright;
        $this->credits = $credits;
        $this->description = $description;
        $this->duration = $duration;
        $this->expression = $expression;
        $this->framerate = $framerate;
        $this->hashes = $hashes;
        $this->height = $height;
        $this->keywords = $keywords;
        $this->lang = $lang;
        $this->length = $length;
        $this->link = $link;
        $this->medium = $medium;
        $this->player = $player;
        $this->ratings = $ratings;
        $this->restrictions = $restrictions;
        $this->samplingrate = $samplingrate;
        $this->thumbnails = $thumbnails;
        $this->title = $title;
        $this->type = $type;
        $this->width = $width;

if (function_exists('idn_to_ascii')) {
            $parsed = \SimplePie\Misc::parse_url($link ?? '');
            if ($parsed['authority'] !== '' && !ctype_print($parsed['authority'])) {
                $authority = (string) \idn_to_ascii($parsed['authority'], \IDNA_NONTRANSITIONAL_TO_ASCII, \INTL_IDNA_VARIANT_UTS46);
                $this->link = \SimplePie\Misc::compress_parse_url($parsed['scheme'], $authority, $parsed['path'], $parsed['query'], $parsed['fragment']);
            }
        }
        $this->handler = $this->get_handler(); // Needs to load last
    }

/**
     * String-ified version
     *
     * @return string
     */
    public function __toString()
    {
        // There is no $this->data here
        return md5(serialize($this));
    }

/**
     * Get the bitrate
     *
     * @return string|null
     */
    public function get_bitrate()
    {
        if ($this->bitrate !== null) {
            return $this->bitrate;
        }

return null;
    }

/**
     * Get a single caption
     *
     * @param int $key
     * @return \SimplePie\Caption|null
     */
    public function get_caption(int $key = 0)
    {
        $captions = $this->get_captions();
        if (isset($captions[$key])) {
            return $captions[$key];
        }

return null;
    }

/**
     * Get all captions
     *
     * @return Caption[]|null
     */
    public function get_captions()
    {
        if ($this->captions !== null) {
            return $this->captions;
        }

return null;
    }

/**
     * Get a single category
     *
     * @param int $key
     * @return \SimplePie\Category|null
     */
    public function get_category(int $key = 0)
    {
        $categories = $this->get_categories();
        if (isset($categories[$key])) {
            return $categories[$key];
        }

return null;
    }

/**
     * Get all categories
     *
     * @return \SimplePie\Category[]|null
     */
    public function get_categories()
    {
        if ($this->categories !== null) {
            return $this->categories;
        }

return null;
    }

/**
     * Get the number of audio channels
     *
     * @return int|null
     */
    public function get_channels()
    {
        if ($this->channels !== null) {
            return $this->channels;
        }

return null;
    }

/**
     * Get the copyright information
     *
     * @return \SimplePie\Copyright|null
     */
    public function get_copyright()
    {
        if ($this->copyright !== null) {
            return $this->copyright;
        }

return null;
    }

/**
     * Get a single credit
     *
     * @param int $key
     * @return \SimplePie\Credit|null
     */
    public function get_credit(int $key = 0)
    {
        $credits = $this->get_credits();
        if (isset($credits[$key])) {
            return $credits[$key];
        }

return null;
    }

/**
     * Get all credits
     *
     * @return Credit[]|null
     */
    public function get_credits()
    {
        if ($this->credits !== null) {
            return $this->credits;
        }

return null;
    }

/**
     * Get the description of the enclosure
     *
     * @return string|null
     */
    public function get_description()
    {
        if ($this->description !== null) {
            return $this->description;
        }

return null;
    }

/**
     * Get the duration of the enclosure
     *
     * @param bool $convert Convert seconds into hh:mm:ss
     * @return string|int|null 'hh:mm:ss' string if `$convert` was specified, otherwise integer (or null if none found)
     */
    public function get_duration(bool $convert = false)
    {
        if ($this->duration !== null) {
            if ($convert) {
                $time = \SimplePie\Misc::time_hms($this->duration);
                return $time;
            }

return $this->duration;
        }

return null;
    }

/**
     * Get the expression
     *
     * @return string Probably one of 'sample', 'full', 'nonstop', 'clip'. Defaults to 'full'
     */
    public function get_expression()
    {
        if ($this->expression !== null) {
            return $this->expression;
        }

return 'full';
    }

/**
     * Get the file extension
     *
     * @return string|null
     */
    public function get_extension()
    {
        if ($this->link !== null) {
            $url = \SimplePie\Misc::parse_url($this->link);
            if ($url['path'] !== '') {
                return pathinfo($url['path'], PATHINFO_EXTENSION);
            }
        }
        return null;
    }

/**
     * Get the framerate (in frames-per-second)
     *
     * @return string|null
     */
    public function get_framerate()
    {
        if ($this->framerate !== null) {
            return $this->framerate;
        }

return null;
    }

/**
     * Get the preferred handler
     *
     * @return string|null One of 'flash', 'fmedia', 'quicktime', 'wmedia', 'mp3'
     */
    public function get_handler()
    {
        return $this->get_real_type(true);
    }

/**
     * Get a single hash
     *
     * @link http://www.rssboard.org/media-rss#media-hash
     * @param int $key
     * @return string|null Hash as per `media:hash`, prefixed with "$algo:"
     */
    public function get_hash(int $key = 0)
    {
        $hashes = $this->get_hashes();
        if (isset($hashes[$key])) {
            return $hashes[$key];
        }

return null;
    }

/**
     * Get all credits
     *
     * @return string[]|null Array of strings, see {@see get_hash()}
     */
    public function get_hashes()
    {
        if ($this->hashes !== null) {
            return $this->hashes;
        }

return null;
    }

/**
     * Get the height
     *
     * @return string|null
     */
    public function get_height()
    {
        if ($this->height !== null) {
            return $this->height;
        }

return null;
    }

/**
     * Get the language
     *
     * @link http://tools.ietf.org/html/rfc3066
     * @return string|null Language code as per RFC 3066
     */
    public function get_language()
    {
        if ($this->lang !== null) {
            return $this->lang;
        }

return null;
    }

/**
     * Get a single keyword
     *
     * @param int $key
     * @return string|null
     */
    public function get_keyword(int $key = 0)
    {
        $keywords = $this->get_keywords();
        if (isset($keywords[$key])) {
            return $keywords[$key];
        }

return null;
    }

/**
     * Get all keywords
     *
     * @return string[]|null
     */
    public function get_keywords()
    {
        if ($this->keywords !== null) {
            return $this->keywords;
        }

return null;
    }

/**
     * Get length
     *
     * @return ?int Length in bytes
     */
    public function get_length()
    {
        if ($this->length !== null) {
            return $this->length;
        }

return null;
    }

/**
     * Get the URL
     *
     * @return string|null
     */
    public function get_link()
    {
        if ($this->link !== null) {
            return $this->link;
        }

return null;
    }

/**
     * Get the medium
     *
     * @link http://www.rssboard.org/media-rss#media-content
     * @return string|null Should be one of 'image', 'audio', 'video', 'document', 'executable'
     */
    public function get_medium()
    {
        if ($this->medium !== null) {
            return $this->medium;
        }

return null;
    }

/**
     * Get the player URL
     *
     * Typically the same as {@see get_permalink()}
     * @return string|null Player URL
     */
    public function get_player()
    {
        if ($this->player !== null) {
            return $this->player;
        }

return null;
    }

/**
     * Get a single rating
     *
     * @param int $key
     * @return \SimplePie\Rating|null
     */
    public function get_rating(int $key = 0)
    {
        $ratings = $this->get_ratings();
        if (isset($ratings[$key])) {
            return $ratings[$key];
        }

return null;
    }

/**
     * Get all ratings
     *
     * @return Rating[]|null
     */
    public function get_ratings()
    {
        if ($this->ratings !== null) {
            return $this->ratings;
        }

return null;
    }

/**
     * Get a single restriction
     *
     * @param int $key
     * @return \SimplePie\Restriction|null
     */
    public function get_restriction(int $key = 0)
    {
        $restrictions = $this->get_restrictions();
        if (isset($restrictions[$key])) {
            return $restrictions[$key];
        }

return null;
    }

/**
     * Get all restrictions
     *
     * @return Restriction[]|null
     */
    public function get_restrictions()
    {
        if ($this->restrictions !== null) {
            return $this->restrictions;
        }

return null;
    }

/**
     * Get the sampling rate (in kHz)
     *
     * @return string|null
     */
    public function get_sampling_rate()
    {
        if ($this->samplingrate !== null) {
            return $this->samplingrate;
        }

return null;
    }

/**
     * Get the file size (in MiB)
     *
     * @return float|null File size in mebibytes (1048 bytes)
     */
    public function get_size()
    {
        $length = $this->get_length();
        if ($length !== null) {
            return round($length / 1048576, 2);
        }

return null;
    }

/**
     * Get a single thumbnail
     *
     * @param int $key
     * @return string|null Thumbnail URL
     */
    public function get_thumbnail(int $key = 0)
    {
        $thumbnails = $this->get_thumbnails();
        if (isset($thumbnails[$key])) {
            return $thumbnails[$key];
        }

return null;
    }

/**
     * Get all thumbnails
     *
     * @return string[]|null Array of thumbnail URLs
     */
    public function get_thumbnails()
    {
        if ($this->thumbnails !== null) {
            return $this->thumbnails;
        }

return null;
    }

/**
     * Get the title
     *
     * @return string|null
     */
    public function get_title()
    {
        if ($this->title !== null) {
            return $this->title;
        }

return null;
    }

/**
     * Get mimetype of the enclosure
     *
     * @see get_real_type()
     * @return string|null MIME type
     */
    public function get_type()
    {
        if ($this->type !== null) {
            return $this->type;
        }

return null;
    }

/**
     * Get the width
     *
     * @return string|null
     */
    public function get_width()
    {
        if ($this->width !== null) {
            return $this->width;
        }

return null;
    }

/**
     * Embed the enclosure using `<embed>`
     *
     * @deprecated Use the second parameter to {@see embed} instead
     *
     * @param array<string, mixed>|string $options See first parameter to {@see embed}
     * @return string HTML string to output
     */
    public function native_embed($options = '')
    {
        return $this->embed($options, true);
    }

/**
     * Embed the enclosure using Javascript
     *
     * `$options` is an array or comma-separated key:value string, with the
     * following properties:
     *
     * - `alt` (string): Alternate content for when an end-user does not have
     *    the appropriate handler installed or when a file type is
     *    unsupported. Can be any text or HTML. Defaults to blank.
     * - `altclass` (string): If a file type is unsupported, the end-user will
     *    see the alt text (above) linked directly to the content. That link
     *    will have this value as its class name. Defaults to blank.
     * - `audio` (string): This is an image that should be used as a
     *    placeholder for audio files before they're loaded (QuickTime-only).
     *    Can be any relative or absolute URL. Defaults to blank.
     * - `bgcolor` (string): The background color for the media, if not
     *    already transparent. Defaults to `#ffffff`.
     * - `height` (integer): The height of the embedded media. Accepts any
     *    numeric pixel value (such as `360`) or `auto`. Defaults to `auto`,
     *    and it is recommended that you use this default.
     * - `loop` (boolean): Do you want the media to loop when it's done?
     *    Defaults to `false`.
     * - `mediaplayer` (string): The location of the included
     *    `mediaplayer.swf` file. This allows for the playback of Flash Video
     *    (`.flv`) files, and is the default handler for non-Odeo MP3's.
     *    Defaults to blank.
     * - `video` (string): This is an image that should be used as a
     *    placeholder for video files before they're loaded (QuickTime-only).
     *    Can be any relative or absolute URL. Defaults to blank.
     * - `width` (integer): The width of the embedded media. Accepts any
     *    numeric pixel value (such as `480`) or `auto`. Defaults to `auto`,
     *    and it is recommended that you use this default.
     * - `widescreen` (boolean): Is the enclosure widescreen or standard?
     *    This applies only to video enclosures, and will automatically resize
     *    the content appropriately.  Defaults to `false`, implying 4:3 mode.
     *
     * Note: Non-widescreen (4:3) mode with `width` and `height` set to `auto`
     * will default to 480x360 video resolution.  Widescreen (16:9) mode with
     * `width` and `height` set to `auto` will default to 480x270 video resolution.
     *
     * @todo If the dimensions for media:content are defined, use them when width/height are set to 'auto'.
     * @param array<string, mixed>|string $options Comma-separated key:value list, or array
     * @param bool $native Use `<embed>`
     * @return string HTML string to output
     */
    public function embed($options = '', bool $native = false)
    {
        // Set up defaults
        $audio = '';
        $video = '';
        $alt = '';
        $altclass = '';
        $loop = 'false';
        $width = 'auto';
        $height = 'auto';
        $bgcolor = '#ffffff';
        $mediaplayer = '';
        $widescreen = false;
        $handler = $this->get_handler();
        $type = $this->get_real_type();
        $placeholder = '';

// Process options and reassign values as necessary
        if (is_array($options)) {
            extract($options);
        } else {
            $options = explode(',', $options);
            foreach ($options as $option) {
                $opt = explode(':', $option, 2);
                if (isset($opt[0], $opt[1])) {
                    $opt[0] = trim($opt[0]);
                    $opt[1] = trim($opt[1]);
                    switch ($opt[0]) {
                        case 'audio':
                            $audio = $opt[1];
                            break;

case 'video':
                            $video = $opt[1];
                            break;

case 'alt':
                            $alt = $opt[1];
                            break;

case 'altclass':
                            $altclass = $opt[1];
                            break;

case 'loop':
                            $loop = $opt[1];
                            break;

case 'width':
                            $width = $opt[1];
                            break;

case 'height':
                            $height = $opt[1];
                            break;

case 'bgcolor':
                            $bgcolor = $opt[1];
                            break;

case 'mediaplayer':
                            $mediaplayer = $opt[1];
                            break;

case 'widescreen':
                            $widescreen = $opt[1];
                            break;
                    }
                }
            }
        }

$mime = explode('/', (string) $type, 2);
        $mime = $mime[0];

// Process values for 'auto'
        if ($width === 'auto') {
            if ($mime === 'video') {
                if ($height === 'auto') {
                    $width = 480;
                } elseif ($widescreen) {
                    $width = round((intval($height) / 9) * 16);
                } else {
                    $width = round((intval($height) / 3) * 4);
                }
            } else {
                $width = '100%';
            }
        }

if ($height === 'auto') {
            if ($mime === 'audio') {
                $height = 0;
            } elseif ($mime === 'video') {
                if ($width === 'auto') {
                    if ($widescreen) {
                        $height = 270;
                    } else {
                        $height = 360;
                    }
                } elseif ($widescreen) {
                    $height = round((intval($width) / 16) * 9);
                } else {
                    $height = round((intval($width) / 4) * 3);
                }
            } else {
                $height = 376;
            }
        } elseif ($mime === 'audio') {
            $height = 0;
        }

// Set proper placeholder value
        if ($mime === 'audio') {
            $placeholder = $audio;
        } elseif ($mime === 'video') {
            $placeholder = $video;
        }

$embed = '';

// Flash
        if ($handler === 'flash') {
            if ($native) {
                $embed .= "<embed src=\"" . $this->get_link() . "\" pluginspage=\"http://adobe.com/go/getflashplayer\" type=\"$type\" quality=\"high\" width=\"$width\" height=\"$height\" bgcolor=\"$bgcolor\" loop=\"$loop\"></embed>";
            } else {
                $embed .= "<script type='text/javascript'>embed_flash('$bgcolor', '$width', '$height', '" . $this->get_link() . "', '$loop', '$type');</script>";
            }
        }

// Flash Media Player file types.
        // Preferred handler for MP3 file types.
        elseif ($handler === 'fmedia' || ($handler === 'mp3' && $mediaplayer !== '')) {
            if (is_numeric($height)) {
                $height += 20;
            }

if ($native) {
                $embed .= "<embed src=\"$mediaplayer\" pluginspage=\"http://adobe.com/go/getflashplayer\" type=\"application/x-shockwave-flash\" quality=\"high\" width=\"$width\" height=\"$height\" wmode=\"transparent\" flashvars=\"file=" . rawurlencode($this->get_link().'?file_extension=.'.$this->get_extension()) . "&autostart=false&repeat=$loop&showdigits=true&showfsbutton=false\"></embed>";
            } else {
                $embed .= "<script type='text/javascript'>embed_flv('$width', '$height', '" . rawurlencode($this->get_link().'?file_extension=.'.$this->get_extension()) . "', '$placeholder', '$loop', '$mediaplayer');</script>";
            }
        }

// QuickTime 7 file types.  Need to test with QuickTime 6.
        // Only handle MP3's if the Flash Media Player is not present.
        elseif ($handler === 'quicktime' || ($handler === 'mp3' && $mediaplayer === '')) {
            if (is_numeric($height)) {
                $height += 16;
            }

if ($native) {
                if ($placeholder !== '') {
                    $embed .= "<embed type=\"$type\" style=\"cursor:hand; cursor:pointer;\" href=\"" . $this->get_link() . "\" src=\"$placeholder\" width=\"$width\" height=\"$height\" autoplay=\"false\" target=\"myself\" controller=\"false\" loop=\"$loop\" scale=\"aspect\" bgcolor=\"$bgcolor\" pluginspage=\"http://apple.com/quicktime/download/\"></embed>";
                } else {
                    $embed .= "<embed type=\"$type\" style=\"cursor:hand; cursor:pointer;\" src=\"" . $this->get_link() . "\" width=\"$width\" height=\"$height\" autoplay=\"false\" target=\"myself\" controller=\"true\" loop=\"$loop\" scale=\"aspect\" bgcolor=\"$bgcolor\" pluginspage=\"http://apple.com/quicktime/download/\"></embed>";
                }
            } else {
                $embed .= "<script type='text/javascript'>embed_quicktime('$type', '$bgcolor', '$width', '$height', '" . $this->get_link() . "', '$placeholder', '$loop');</script>";
            }
        }

// Windows Media
        elseif ($handler === 'wmedia') {
            if (is_numeric($height)) {
                $height += 45;
            }

if ($native) {
                $embed .= "<embed type=\"application/x-mplayer2\" src=\"" . $this->get_link() . "\" autosize=\"1\" width=\"$width\" height=\"$height\" showcontrols=\"1\" showstatusbar=\"0\" showdisplay=\"0\" autostart=\"0\"></embed>";
            } else {
                $embed .= "<script type='text/javascript'>embed_wmedia('$width', '$height', '" . $this->get_link() . "');</script>";
            }
        }

// Everything else
        else {
            $embed .= '<a href="' . $this->get_link() . '" class="' . $altclass . '">' . $alt . '</a>';
        }

return $embed;
    }

/**
     * Get the real media type
     *
     * Often, feeds lie to us, necessitating a bit of deeper inspection. This
     * converts types to their canonical representations based on the file
     * extension
     *
     * @see get_type()
     * @param bool $find_handler Internal use only, use {@see get_handler()} instead
     * @return string|null MIME type
     */
    public function get_real_type(bool $find_handler = false)
    {
        // Mime-types by handler.
        $types_flash = ['application/x-shockwave-flash', 'application/futuresplash']; // Flash
        $types_fmedia = ['video/flv', 'video/x-flv','flv-application/octet-stream']; // Flash Media Player
        $types_quicktime = ['audio/3gpp', 'audio/3gpp2', 'audio/aac', 'audio/x-aac', 'audio/aiff', 'audio/x-aiff', 'audio/mid', 'audio/midi', 'audio/x-midi', 'audio/mp4', 'audio/m4a', 'audio/x-m4a', 'audio/wav', 'audio/x-wav', 'video/3gpp', 'video/3gpp2', 'video/m4v', 'video/x-m4v', 'video/mp4', 'video/mpeg', 'video/x-mpeg', 'video/quicktime', 'video/sd-video']; // QuickTime
        $types_wmedia = ['application/asx', 'application/x-mplayer2', 'audio/x-ms-wma', 'audio/x-ms-wax', 'video/x-ms-asf-plugin', 'video/x-ms-asf', 'video/x-ms-wm', 'video/x-ms-wmv', 'video/x-ms-wvx']; // Windows Media
        $types_mp3 = ['audio/mp3', 'audio/x-mp3', 'audio/mpeg', 'audio/x-mpeg']; // MP3

$type = $this->get_type();
        if ($type !== null) {
            $type = strtolower($type);
        }

// If we encounter an unsupported mime-type, check the file extension and guess intelligently.
        if (!in_array($type, array_merge($types_flash, $types_fmedia, $types_quicktime, $types_wmedia, $types_mp3))) {
            $extension = $this->get_extension();
            if ($extension === null) {
                return null;
            }

switch (strtolower($extension)) {
                // Audio mime-types
                case 'aac':
                case 'adts':
                    $type = 'audio/acc';
                    break;

case 'aif':
                case 'aifc':
                case 'aiff':
                case 'cdda':
                    $type = 'audio/aiff';
                    break;

case 'bwf':
                    $type = 'audio/wav';
                    break;

case 'kar':
                case 'mid':
                case 'midi':
                case 'smf':
                    $type = 'audio/midi';
                    break;

case 'm4a':
                    $type = 'audio/x-m4a';
                    break;

case 'mp3':
                case 'swa':
                    $type = 'audio/mp3';
                    break;

case 'wav':
                    $type = 'audio/wav';
                    break;

case 'wax':
                    $type = 'audio/x-ms-wax';
                    break;

case 'wma':
                    $type = 'audio/x-ms-wma';
                    break;

case '3gp':
                case '3gpp':
                    // Video mime-types
                    $type = 'video/3gpp';
                    break;

case '3g2':
                case '3gp2':
                    $type = 'video/3gpp2';
                    break;

case 'asf':
                    $type = 'video/x-ms-asf';
                    break;

case 'flv':
                    $type = 'video/x-flv';
                    break;

case 'm1a':
                case 'm1s':
                case 'm1v':
                case 'm15':
                case 'm75':
                case 'mp2':
                case 'mpa':
                case 'mpeg':
                case 'mpg':
                case 'mpm':
                case 'mpv':
                    $type = 'video/mpeg';
                    break;

case 'm4v':
                    $type = 'video/x-m4v';
                    break;

case 'mov':
                case 'qt':
                    $type = 'video/quicktime';
                    break;

case 'mp4':
                case 'mpg4':
                    $type = 'video/mp4';
                    break;

case 'sdv':
                    $type = 'video/sd-video';
                    break;

case 'wm':
                    $type = 'video/x-ms-wm';
                    break;

case 'wmv':
                    $type = 'video/x-ms-wmv';
                    break;

case 'wvx':
                    $type = 'video/x-ms-wvx';
                    break;

case 'spl':
                    // Flash mime-types
                    $type = 'application/futuresplash';
                    break;

case 'swf':
                    $type = 'application/x-shockwave-flash';
                    break;
            }
        }

if ($find_handler) {
            if (in_array($type, $types_flash)) {
                return 'flash';
            } elseif (in_array($type, $types_fmedia)) {
                return 'fmedia';
            } elseif (in_array($type, $types_quicktime)) {
                return 'quicktime';
            } elseif (in_array($type, $types_wmedia)) {
                return 'wmedia';
            } elseif (in_array($type, $types_mp3)) {
                return 'mp3';
            }

return null;
        }

return $type;
    }
}

class_alias('SimplePie\Enclosure', 'SimplePie_Enclosure');

Editing: Enclosure.php

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