283 lines
10 KiB
PHP
283 lines
10 KiB
PHP
<?php declare(strict_types=1);
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require_once "config.php";
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/*
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* This is used by the image transcoding code when there is an error while transcoding
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*/
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class VideoTranscodeException extends SCoreException
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{
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}
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class TranscodeVideo extends Extension
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{
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/** @var TranscodeVideoTheme */
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protected ?Themelet $theme;
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const ACTION_BULK_TRANSCODE = "bulk_transcode_video";
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const FORMAT_NAMES = [
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VideoContainers::MKV => "matroska",
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VideoContainers::WEBM => "webm",
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VideoContainers::OGG => "ogg",
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VideoContainers::MP4 => "mp4",
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];
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/**
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* Needs to be after upload, but before the processing extensions
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*/
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public function get_priority(): int
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{
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return 45;
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}
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public function onInitExt(InitExtEvent $event)
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{
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global $config;
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$config->set_default_bool(TranscodeVideoConfig::ENABLED, true);
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$config->set_default_bool(TranscodeVideoConfig::UPLOAD, false);
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$config->set_default_bool(TranscodeVideoConfig::UPLOAD_TO_NATIVE_CONTAINER, false);
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}
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public function onImageAdminBlockBuilding(ImageAdminBlockBuildingEvent $event)
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{
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global $user;
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if ($event->image->video===true && $user->can(Permissions::EDIT_FILES)) {
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$options = self::get_output_options($event->image->get_mime(), $event->image->video_codec);
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if (!empty($options)&&sizeof($options)>1) {
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$event->add_part($this->theme->get_transcode_html($event->image, $options));
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}
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}
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}
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public function onSetupBuilding(SetupBuildingEvent $event)
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{
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$sb = $event->panel->create_new_block("Video Transcode");
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$sb->start_table();
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$sb->add_bool_option(TranscodeVideoConfig::ENABLED, "Allow transcoding images: ", true);
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$sb->add_bool_option(TranscodeVideoConfig::UPLOAD_TO_NATIVE_CONTAINER, "Convert videos using MPEG-4 or WEBM to their native containers:", true);
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$sb->end_table();
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}
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public function onDataUpload(DataUploadEvent $event)
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{
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// global $config;
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//
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// if ($config->get_bool(TranscodeVideoConfig::UPLOAD) == true) {
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// $ext = strtolower($event->type);
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//
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// $ext = Media::normalize_format($ext);
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//
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// if ($event->type=="gif"&&Media::is_animated_gif($event->tmpname)) {
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// return;
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// }
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//
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// if (in_array($ext, array_values(self::INPUT_FORMATS))) {
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// $target_format = $config->get_string(TranscodeVideoConfig::UPLOAD_PREFIX.$ext);
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// if (empty($target_format)) {
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// return;
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// }
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// try {
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// $new_image = $this->transcode_image($event->tmpname, $ext, $target_format);
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// $event->set_mime(Media::determine_ext($target_format));
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// $event->set_tmpname($new_image);
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// } catch (Exception $e) {
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// log_error("transcode_video", "Error while performing upload transcode: ".$e->getMessage());
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// // We don't want to interfere with the upload process,
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// // so if something goes wrong the untranscoded image jsut continues
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// }
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// }
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// }
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}
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public function onPageRequest(PageRequestEvent $event)
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{
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global $page, $user;
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if ($event->page_matches("transcode_video") && $user->can(Permissions::EDIT_FILES)) {
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if ($event->count_args() >= 1) {
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$image_id = int_escape($event->get_arg(0));
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} elseif (isset($_POST['image_id'])) {
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$image_id = int_escape($_POST['image_id']);
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} else {
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throw new VideoTranscodeException("Can not transcode video: No valid ID given.");
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}
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$image_obj = Image::by_id($image_id);
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if (is_null($image_obj)) {
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$this->theme->display_error(404, "Post not found", "No post in the database has the ID #$image_id");
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} else {
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if (isset($_POST['transcode_format'])) {
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try {
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$this->transcode_and_replace_video($image_obj, $_POST['transcode_format']);
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$page->set_mode(PageMode::REDIRECT);
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$page->set_redirect(make_link("post/view/".$image_id));
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} catch (VideoTranscodeException $e) {
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$this->theme->display_transcode_error($page, "Error Transcoding", $e->getMessage());
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}
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}
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}
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}
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}
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public function onBulkActionBlockBuilding(BulkActionBlockBuildingEvent $event)
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{
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global $user;
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if ($user->can(Permissions::EDIT_FILES)) {
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$event->add_action(
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self::ACTION_BULK_TRANSCODE,
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"Transcode Video",
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null,
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"",
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$this->theme->get_transcode_picker_html(self::get_output_options())
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);
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}
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}
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public function onBulkAction(BulkActionEvent $event)
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{
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global $user, $database, $page;
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switch ($event->action) {
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case self::ACTION_BULK_TRANSCODE:
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if (!isset($_POST['transcode_format'])) {
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return;
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}
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if ($user->can(Permissions::EDIT_FILES)) {
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$format = $_POST['transcode_format'];
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$total = 0;
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foreach ($event->items as $image) {
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try {
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$database->begin_transaction();
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$output_image = $this->transcode_and_replace_video($image, $format);
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// If a subsequent transcode fails, the database needs to have everything about the previous
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// transcodes recorded already, otherwise the image entries will be stuck pointing to
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// missing image files
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$database->commit();
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if ($output_image!=$image) {
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$total++;
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}
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} catch (Exception $e) {
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log_error("transcode_video", "Error while bulk transcode on item {$image->id} to $format: ".$e->getMessage());
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try {
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$database->rollback();
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} catch (Exception $e) {
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// is this safe? o.o
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}
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}
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}
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$page->flash("Transcoded $total items");
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}
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break;
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}
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}
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private static function get_output_options(?String $starting_container = null, ?String $starting_codec = null): array
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{
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$output = ["" => ""];
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foreach (VideoContainers::ALL as $container) {
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if ($starting_container==$container) {
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continue;
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}
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if (!empty($starting_codec)&&
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!VideoContainers::is_video_codec_supported($container, $starting_codec)) {
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continue;
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}
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$description = MimeMap::get_name_for_mime($container);
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$output[$description] = $container;
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}
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return $output;
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}
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private function transcode_and_replace_video(Image $image, String $target_mime): Image
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{
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if ($image->get_mime()==$target_mime) {
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return $image;
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}
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if ($image->video==null||($image->video===true && empty($image->video_codec))) {
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// If image predates the media system, or the video codec support, run a media check
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send_event(new MediaCheckPropertiesEvent($image));
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$image->save_to_db();
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}
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if (empty($image->video_codec)) {
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throw new VideoTranscodeException("Cannot transcode item $image->id because its video codec is not known");
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}
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$original_file = warehouse_path(Image::IMAGE_DIR, $image->hash);
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$tmp_filename = tempnam(sys_get_temp_dir(), "shimmie_transcode_video");
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try {
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$tmp_filename = $this->transcode_video($original_file, $image->video_codec, $target_mime, $tmp_filename);
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$new_image = new Image();
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$new_image->hash = md5_file($tmp_filename);
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$new_image->filesize = filesize($tmp_filename);
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$new_image->filename = $image->filename;
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$new_image->width = $image->width;
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$new_image->height = $image->height;
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/* Move the new image into the main storage location */
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$target = warehouse_path(Image::IMAGE_DIR, $new_image->hash);
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if (!@copy($tmp_filename, $target)) {
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throw new VideoTranscodeException("Failed to copy new post file from temporary location ({$tmp_filename}) to archive ($target)");
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}
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send_event(new ImageReplaceEvent($image->id, $new_image));
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return $new_image;
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} finally {
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/* Remove temporary file */
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@unlink($tmp_filename);
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}
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}
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private function transcode_video(String $source_file, String $source_video_codec, String $target_mime, string $target_file): string
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{
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global $config;
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if (empty($source_video_codec)) {
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throw new VideoTranscodeException("Cannot transcode item because it's video codec is not known");
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}
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$ffmpeg = $config->get_string(MediaConfig::FFMPEG_PATH);
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if (empty($ffmpeg)) {
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throw new VideoTranscodeException("ffmpeg path not configured");
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}
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$command = new CommandBuilder($ffmpeg);
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$command->add_flag("-y"); // Bypass y/n prompts
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$command->add_flag("-i");
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$command->add_escaped_arg($source_file);
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if (!VideoContainers::is_video_codec_supported($target_mime, $source_video_codec)) {
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throw new VideoTranscodeException("Cannot transcode item to $target_mime because it does not support the video codec $source_video_codec");
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}
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// TODO: Implement transcoding the codec as well. This will be much more advanced than just picking a container.
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$command->add_flag("-c");
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$command->add_flag("copy");
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$command->add_flag("-map"); // Copies all streams
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$command->add_flag("0");
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$command->add_flag("-f");
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$format = self::FORMAT_NAMES[$target_mime];
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$command->add_flag($format);
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$command->add_escaped_arg($target_file);
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$command->execute(true);
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return $target_file;
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}
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}
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