public function extract( $richtext, $what_to_extract = self::ALL, $extra_args = array() ) {
		$media = array();

		// Support passing a WordPress Post for the $richtext parameter.
		if ( is_a( $richtext, 'WP_Post' ) ) {
			$extra_args['post'] = $richtext;
			$richtext           = $extra_args['post']->post_content;
		}

		$plaintext = $this->strip_markup( $richtext );


		// Extract links.
		if ( self::LINKS & $what_to_extract ) {
			$media = array_merge_recursive( $media, $this->extract_links( $richtext, $plaintext, $extra_args ) );
		}

		// Extract mentions.
		if ( self::MENTIONS & $what_to_extract ) {
			$media = array_merge_recursive( $media, $this->extract_mentions( $richtext, $plaintext, $extra_args ) );
		}

		// Extract images.
		if ( self::IMAGES & $what_to_extract ) {
			$media = array_merge_recursive( $media, $this->extract_images( $richtext, $plaintext, $extra_args ) );
		}

		// Extract shortcodes.
		if ( self::SHORTCODES & $what_to_extract ) {
			$media = array_merge_recursive( $media, $this->extract_shortcodes( $richtext, $plaintext, $extra_args ) );
		}

		// Extract oEmbeds.
		if ( self::EMBEDS & $what_to_extract ) {
			$media = array_merge_recursive( $media, $this->extract_embeds( $richtext, $plaintext, $extra_args ) );
		}

		// Extract audio.
		if ( self::AUDIO & $what_to_extract ) {
			$media = array_merge_recursive( $media, $this->extract_audio( $richtext, $plaintext, $extra_args ) );
		}

		// Extract video.
		if ( self::VIDEOS & $what_to_extract ) {
			$media = array_merge_recursive( $media, $this->extract_video( $richtext, $plaintext, $extra_args ) );
		}

		/**
		 * Filters media extracted from text.
		 *
		 * @since 2.3.0
		 *
		 * @param array  $media           Extracted media. See {@link BP_Media_Extractor::extract()} for format.
		 * @param string $richtext        Content to parse.
		 * @param int    $what_to_extract Media type to extract.
		 * @param array  $extra_args      Bespoke data for a particular extractor.
		 * @param string $plaintext       Copy of $richtext without any markup.
		 */
		return apply_filters( 'bp_media_extractor_extract', $media, $richtext, $what_to_extract, $extra_args, $plaintext );
	}