//==========================================================================
private IntPtr CreateHandle()
{
IntPtr handle = m_Library.libvlc_media_player_new(m_Instance.Handle);
if (handle == IntPtr.Zero)
{
throw new LibVLCException(m_Library);
}
RegisterMediaPlayer(handle, this);
try
{
IntPtr media_player_event_manager = m_Library.libvlc_media_player_event_manager(handle);
if (media_player_event_manager == IntPtr.Zero)
{
throw new LibVLCException(m_Library);
}
int event_index = 0;
try
{
while (event_index < m_Events.Length)
{
if (m_Library.libvlc_event_attach(media_player_event_manager, m_Events[event_index++], m_EventManagerEventCallback, IntPtr.Zero) != 0)
{
throw new LibVLCException(m_Library);
}
}
}
catch
{
while (event_index > 0)
{
m_Library.libvlc_event_attach(media_player_event_manager, m_Events[--event_index], m_EventManagerEventCallback, IntPtr.Zero);
}
throw;
}
m_Library.libvlc_video_set_format_callbacks(handle, m_VideoFormatCallback, m_VideoCleanupCallback);
m_Library.libvlc_video_set_callbacks(handle, m_VideoLockCallback, m_VideoUnlockCallback, m_VideoDisplayCallback);
return(handle);
}
catch
{
UnregisterMediaPlayer(handle);
m_Library.libvlc_media_player_release(handle);
throw;
}
}
private void GenerateImpl(int thumbnailWidth, int secondStep, string thumbnailDir, string filepath, NamedPipeClient<string> mediaScribeServer)
{
//TODO - ensure that these don't get wrapped in quotes, so we don't have to strip them out.
filepath = filepath.Substring(1, filepath.Length - 2);
thumbnailDir = thumbnailDir.Substring(1, thumbnailDir.Length - 2);
if (false == Directory.Exists(thumbnailDir))
Directory.CreateDirectory(thumbnailDir);
if (null == library)
{
#region start VLC
string[] vlcargs = {
"--intf", "dummy", /* no interface */
"--vout", "dummy", /* we don't want video (output) */
"--no-audio", /* we don't want audio (decoding) */
"--no-video-title-show", /* nor the filename displayed */
"--no-stats", /* no stats */
"--no-sub-autodetect-file", /* we don't want subtitles */
"--no-spu",
"--no-osd",
// "--no-inhibit", /* we don't want interfaces */
"--no-disable-screensaver", /* we don't want interfaces */
"--no-snapshot-preview", /* no blending in dummy vout */
};
library = LibVLCLibrary.Load(null);
IntPtr m;
/* Load the VLC engine */
inst = library.libvlc_new(vlcargs);
/* Create a new item */
m = library.libvlc_media_new_path(inst, filepath);
/* Create a media player playing environement */
mp = library.libvlc_media_player_new_from_media(m);
//hook up the libvlc event listening
int event_index = 0;
IntPtr media_player_event_manager = library.libvlc_media_player_event_manager(mp);
LibVLCLibrary.libvlc_callback_t m_EventManagerEventCallback = EventManager_Event;
while (event_index < m_Events.Length)
if (library.libvlc_event_attach(media_player_event_manager, m_Events[event_index++], m_EventManagerEventCallback, IntPtr.Zero) != 0)
throw new LibVLCException(library);
#endregion
}
else
{
library.libvlc_media_player_release(mp);
IntPtr m = library.libvlc_media_new_path(inst, filepath);
mp = library.libvlc_media_player_new_from_media(m);
//hook up the libvlc event listening
int event_index = 0;
IntPtr media_player_event_manager = library.libvlc_media_player_event_manager(mp);
LibVLCLibrary.libvlc_callback_t m_EventManagerEventCallback = EventManager_Event;
while (event_index < m_Events.Length)
if (library.libvlc_event_attach(media_player_event_manager, m_Events[event_index++], m_EventManagerEventCallback, IntPtr.Zero) != 0)
throw new LibVLCException(library);
}
//configure time tracking
TimeSpan time = new TimeSpan(0, 0, 0);
TimeSpan step = new TimeSpan(0, 0, secondStep);
//wait until VLC is playing
signalPlaying = new SemaphoreSlim(0, 1);
/* play the media_player */
int successCode = library.libvlc_media_player_play(mp);
signalPlaying.Wait();
if (errorOccured)
{
string errormsg = library.libvlc_errmsg();
throw new Exception("libvlc_MediaPlayerEncounteredError error: " + errormsg ?? "unknown error... ah crap.");
}
endReached = false;
stopped = false;
int thumbnailHeight = -1;
long trackLength = library.libvlc_media_player_get_length(mp);
//while there's still video left, collect screenshots
while (endReached != true && stopped != true)
{
//if we're flagged to cancel, exit out.
if (State == GeneratorState.Cancelling)
return;
//take screenshot
string fileName = time.TotalSeconds + ".jpg";
string thumbnailFullPath = Path.Combine(thumbnailDir, fileName);
int result = -1;
do
{
if (endReached)
break;
//if we're flagged to cancel, exit out.
if (State == GeneratorState.Cancelling)
return;
int tryCount = 3;
bool successfulSnapshot = false;
Exception error = null;
do
{
try
{
//if we're flagged to cancel, exit out.
if (State == GeneratorState.Cancelling)
return;
successfulSnapshot = false;
result = library.libvlc_video_take_snapshot(mp, 0, thumbnailFullPath, (uint)thumbnailWidth, 0);
successfulSnapshot = true;
}
catch (Exception ex)
{
tryCount--;
error = ex;
}
}
while (!successfulSnapshot && tryCount > 0);
if (null != error && tryCount == 0)
{
throw error;
}
}
while (false == File.Exists(thumbnailFullPath));
if (result == 0)
{
mediaScribeServer.PushMessage(time.TotalSeconds.ToString().PadLeft(6, '0') + " " + fileName);
//Thread.Sleep(70);
}
//increment the time
time += step;
//signalPosChanged.Reset();
library.libvlc_media_player_set_time(mp, (long)time.TotalMilliseconds);
if (library.libvlc_media_player_get_state(mp) == LibVLCLibrary.libvlc_state_t.libvlc_Playing)
library.libvlc_media_player_pause(mp);
if (library.libvlc_media_player_get_time(mp) > trackLength)
return;
if (endReached)
return;
}
}
