public void Parse()
{
VerifyObjectIsNotDisposed();
//
lock (staticLock) {
if (!IsParsed())
{
LibVlcInterop.libvlc_media_parse(this.descriptor);
}
//
if (tracksInfo == null)
{
parseState = new ParseState();
parseState.waitHandle = new EventWaitHandle(false,
EventResetMode.AutoReset);
try {
IntPtr player = LibVlcInterop.libvlc_media_player_new_from_media(this.descriptor);
if (player == IntPtr.Zero)
{
throw new VlcInternalException(String.Format("Can't create an instance of player when parsing. LibVlc tells: {0}",
LibVlcInterop.libvlc_errmsg()));
}
IntPtr playerEvents = LibVlcInterop.libvlc_media_player_event_manager(player);
if (playerEvents == IntPtr.Zero)
{
throw new VlcInternalException(String.Format("Can't get event manager of player when parsing. LibVlc tells: {0}",
LibVlcInterop.libvlc_errmsg()));
}
//
try {
parseState.eventHandler = new LibVlcInterop.VlcEventHandlerDelegate(onTrackInfoEndReached);
IntPtr function = Marshal.GetFunctionPointerForDelegate(parseState.eventHandler);
//
int res = LibVlcInterop.libvlc_event_attach(playerEvents, libvlc_event_type_e.libvlc_MediaPlayerEndReached,
function,
IntPtr.Zero);
if (res != 0)
{
throw new VlcInternalException(String.Format("Unable to attach event {0}",
libvlc_event_type_e.libvlc_MediaPlayerEndReached.ToString()));
}
//
LibVlcInterop.libvlc_media_add_option(descriptor, "sout=#description");
LibVlcInterop.libvlc_media_player_play(player);
//
if (parseState.waitHandle.WaitOne(parseTimeout))
{
//
LibVlcInterop.libvlc_media_player_release(player);
player = IntPtr.Zero;
//
tracksInfo = LibVlcInterop.libvlc_media_get_tracks_info(descriptor);
//
if (logger.IsInfoEnabled)
{
StringBuilder builder = new StringBuilder();
builder.Append("Parsed tracks info: ");
//
foreach (libvlc_media_track_info_t track in tracksInfo)
{
builder.AppendLine("");
if (track.i_type == libvlc_track_t.libvlc_track_audio)
{
builder.AppendLine("Type: audio");
builder.AppendLine("Channels: " + track.i_channels);
builder.AppendLine("Rate: " + track.i_rate);
}
else if (track.i_type == libvlc_track_t.libvlc_track_text)
{
builder.AppendLine("Type: text");
}
else if (track.i_type == libvlc_track_t.libvlc_track_video)
{
builder.AppendLine("Type: video");
}
else
{
builder.AppendLine("Type: unknown");
}
builder.AppendLine("Description: " + LibVlcInterop.vlc_fourcc_GetDescription(0, track.i_codec));
}
//
builder.AppendLine("Total tracks: " + tracksInfo.Length);
logger.Info(builder.ToString());
}
}
else
{
throw new VlcTimeoutException("Can't get tracks information.");
}
} finally {
if (player != IntPtr.Zero)
{
LibVlcInterop.libvlc_media_player_release(player);
}
}
} catch (Exception exc) {
if (logger.IsErrorEnabled)
{
logger.Error("An error occured during parse.", exc);
}
throw;
} finally {
parseState.waitHandle.Close();
parseState = null;
}
}
}
}
