// Request from sign language tool, issued when a complete recording has been captured.
// It is passed as a binary blob that is the actual content that needs to be made into
// an mp4 file. (At this point we don't try to handle recordings too big for this approach.)
// We make a file (with an arbitrary guid name) and attempt to make it the recording for the
// first page element with class bloom-videoContainer.
private void HandleRecordedVideoRequest(ApiRequest request)
{
lock (request)
{
var videoFolder = BookStorage.GetVideoDirectoryAndEnsureExistence(CurrentBook.FolderPath);
var fileName = GetNewVideoFileName();
var path = Path.Combine(videoFolder, fileName);
using (var rawVideo = TempFile.CreateAndGetPathButDontMakeTheFile())
{
using (var rawVideoOutput = new FileStream(rawVideo.Path, FileMode.Create))
{
// Do NOT just get RawPostData and try to write it to a file; this
// typically runs out of memory for anything more than about 2min of video.
// (It write to a MemoryStream, and this seems to manage memory very badly.
// 66MB should not be a huge problem, but somehow it is.)
using (var rawVideoInput = request.RawPostStream)
{
rawVideoInput.CopyTo(rawVideoOutput);
}
}
// The output stream should be closed before trying to access the newly written file.
SaveVideoFile(path, rawVideo.Path);
}
var relativePath = BookStorage.GetVideoFolderName + Path.GetFileName(path);
request.ReplyWithText(UrlPathString.CreateFromUnencodedString(relativePath).UrlEncodedForHttpPath);
}
}
// Request from sign language tool to import a video.
private void HandleImportVideoRequest(ApiRequest request)
{
string path = null;
View.Invoke((Action)(() => {
var videoFiles = LocalizationManager.GetString("EditTab.Toolbox.SignLanguage.FileDialogVideoFiles", "Video files");
var dlg = new DialogAdapters.OpenFileDialogAdapter
{
Multiselect = false,
CheckFileExists = true,
Filter = $"{videoFiles} (*.mp4)|*.mp4"
};
var result = dlg.ShowDialog();
if (result == DialogResult.OK)
{
path = dlg.FileName;
}
}));
if (!string.IsNullOrEmpty(path))
{
_importedVideoIntoBloom = true;
var newVideoPath = Path.Combine(BookStorage.GetVideoDirectoryAndEnsureExistence(CurrentBook.FolderPath), GetNewVideoFileName()); // Use a new name to defeat caching.
RobustFile.Copy(path, newVideoPath);
var relativePath = BookStorage.GetVideoFolderName + Path.GetFileName(newVideoPath);
request.ReplyWithText(UrlPathString.CreateFromUnencodedString(relativePath).UrlEncodedForHttpPath);
}
else
{
// If the user canceled, we didn't exactly succeed, but having the user cancel is such a normal
// event that posting a failure, which is a nuisance to ignore, is not warranted.
request.ReplyWithText("");
}
}
/// <summary>
/// In case the user has been editing video files outside of Bloom, for example,
/// after using the Show In Folder command in the sign language toolbox,
/// we want to update the pages that show those videos to use the new versions.
/// Unfortunately something, probably the browser itself, seems to be very
/// persistent about caching videos, even though our server tells it not to cache
/// things in the book folder (and debug builds don't ever tell it to cache anything).
/// We prevent cache hits on modified files by adding a fake param to the URI.
/// (Also we will remove any trimming...see comment below.)
/// This function is called whenever Bloom is activated in Edit mode.
/// </summary>
/// <param name="sender"></param>
/// <param name="eventArgs"></param>
public void CheckForChangedVideoOnActivate(object sender, EventArgs eventArgs)
{
// We're only going to check for video changes on the current book, if any.
// It's not inconceivable that whatever caches videos will keep a cached one
// for another book, but I think trying to modify books we don't even have open
// is to dangerous, as well as quite difficult.
if (CurrentBook == null)
{
return;
}
// On Linux, this method interferes with successfully referencing a newly imported video file.
// See https://issues.bloomlibrary.org/youtrack/issue/BL-6723. Ignoring just the one call to
// this method suffices for things to work. (On Windows, the sequence of events differs, but
// this change is safe.)
if (_importedVideoIntoBloom)
{
_importedVideoIntoBloom = false;
return;
}
var videoFolderPath = BookStorage.GetVideoDirectoryAndEnsureExistence(CurrentBook.FolderPath);
var filesModifiedSinceDeactivate = new DirectoryInfo(videoFolderPath)
.GetFiles("*.mp4")
.Where(f => GetRealLastModifiedTime(f) > DeactivateTime)
.Select(f => f.FullName)
.ToList();
if (!filesModifiedSinceDeactivate.Any())
{
return;
}
// We might modify the current page, but the user may also have modified it
// without doing anything to cause a Save before the deactivate. So save their
// changes before we go to work on it.
Model.SaveNow();
foreach (var videoPath in filesModifiedSinceDeactivate)
{
var expectedSrcAttr = UrlPathString.CreateFromUnencodedString(BookStorage.GetVideoFolderName + Path.GetFileName(videoPath));
var videoElts = CurrentBook.RawDom.SafeSelectNodes($"//video/source[contains(@src,'{expectedSrcAttr.UrlEncodedForHttpPath}')]");
if (videoElts.Count == 0)
{
continue; // not used in book, ignore
}
// OK, the user has modified the file outside of Bloom. Something is determined to cache video.
// Defeat it by setting a fake param.
// Note that doing this will discard any fragment in the existing URL, typically trimming.
// I think this is good...if the user has edited the video, we should start over assuming he
// wants all of it.
var newSrcAttr = UrlPathString.CreateFromUnencodedString(BookStorage.GetVideoFolderName + Path.GetFileName(videoPath));
HtmlDom.SetSrcOfVideoElement(newSrcAttr, new ElementProxy((XmlElement)videoElts[0]), true, "?now=" + DateTime.Now.Ticks);
}
// We could try to figure out whether one of the modified videos is on the current page.
// But that's the most likely video to be modified, and it doesn't take long to reload,
// and this only happens in the very special case that the user has modified a video outside
// of Bloom.
View.UpdateSingleDisplayedPage(_pageSelection.CurrentSelection);
// Likewise, this is probably overkill, but it's a probably-rare case.
View.UpdateAllThumbnails();
}