separate the two semantics of querying a port's status with a NULL stream;

before, NULL could mean two things: no stream at all or a stream that does not
want to be addressed; now the latter is represented by the new XINE_ANON_STREAM
resulting changes:
* the status() functions now behave differently for NULL and XINE_ANON_STREAM
  (as the commentary always implied, but this was not the case, so post
  plugin rewiring went wrong, because it relies on the status() function)
* the NULL_STREAM defines in audio_out and video_out are obsolete
* update the function comments in the headers
* update the post plugin rewire functions to use the status() functions to
  check, if the old port was opened and handle the new one accordingly;
  this makes open_count obsolete
* change all post plugins accordingly (mostly using XINE_ANON_STREAM instead
  of NULL)
additional change:
* the status() function of audio port now returns the bits/rate/mode values
  of the input and not the output; this is more likely to be what a post plugin
  wants
* the reimplementation of status() in the upmix plugin is obsolete

CVS patchset: 6603
CVS date: 2004/05/29 14:45:25

1 files changed, 4 insertions, 1 deletions

diff --git a/src/xine-engine/xine_internal.h b/src/xine-engine/xine_internal.h
index 081baf9c9..01f5bf5ad 100644
--- a/src/xine-engine/xine_internal.h
+++ b/src/xine-engine/xine_internal.h
@@ -17,7 +17,7 @@
  * along with this program; if not, write to the Free Software
  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA
  *
- * $Id: xine_internal.h,v 1.156 2004/04/16 16:34:22 hadess Exp $
+ * $Id: xine_internal.h,v 1.157 2004/05/29 14:45:25 mroi Exp $
  *
  */
 
@@ -327,6 +327,9 @@ struct xine_stream_s {
 #endif
 };
 
+/* when explicitly noted, some functions accept an anonymous stream,
+ * which is a valid stream that does not want to be addressed. */
+#define XINE_ANON_STREAM ((xine_stream_t *)-1)
 
 
 /*