video: use symbolic constants instead of magic integers

In my opinion this is not really necessary, since there's only a single
user of update_video(), but others reading this code would probably hate
me for using magic integer values instead of symbolic constants.

This should be a purely cosmetic commit; any changes in behavior are
bugs.

1 files changed, 7 insertions, 0 deletions

diff --git a/player/core.h b/player/core.h
index 01fefd0889..013a645e8b 100644
--- a/player/core.h
+++ b/player/core.h
@@ -137,6 +137,13 @@ struct track {
 
 enum {
     MAX_NUM_VO_PTS = 100,
+
+    // update_video() - code also uses: <0 error, 0 eof, >0 progress
+    VD_ERROR = -1,
+    VD_EOF = 0,         // end of file - no new output
+    VD_PROGRESS = 1,    // progress, but no output; repeat call with no waiting
+    VD_NEW_FRAME = 2,   // the call produced a new frame
+    VD_WAIT = 3,        // no EOF, but no output; wait until wakeup
 };
 
 #define NUM_PTRACKS 2