Support for reading VOB subtitle tracks from file inputs initital implementation.

- Patch by davidfstr, Nice Work!
- Adds support for reading VOB subtitle tracks from file inputs.
Tested with:
- MKV VOB -> MKV VOB passthru.
- MKV VOB -> MKV VOB burned in.
VOB subtitle palette moved from per-title to per-track.
Discussion leading up to commit can be referenced here: http://forum.handbrake.fr/viewtopic.php?f=4&t=16267

git-svn-id: svn://svn.handbrake.fr/HandBrake/trunk@3308 b64f7644-9d1e-0410-96f1-a4d463321fa5

1 files changed, 12 insertions, 1 deletions

diff --git a/libhb/internal.h b/libhb/internal.h
index dd217507d..f7092f104 100644
--- a/libhb/internal.h
+++ b/libhb/internal.h
@@ -51,12 +51,23 @@ struct hb_buffer_s
     uint8_t *     data;     // packet data
     int           cur;      // used internally by packet lists (hb_list_t)
 
+    /*
+     * Corresponds to the order that this packet was read from the demuxer.
+     * 
+     * It is important that video decoder work-objects pass this value through
+     * from their input packets to the output packets they generate. Otherwise
+     * RENDERSUB subtitles (especially VOB subtitles) will break.
+     * 
+     * Subtitle decoder work-objects that output a renderable subtitle
+     * format (ex: PICTURESUB) must also be careful to pass the sequence number
+     * through for the same reason.
+     */
     int64_t       sequence;
 
     int           id;           // ID of the track that the packet comes from
     int64_t       start;        // Video and subtitle packets: start time of frame/subtitle
     int64_t       stop;         // Video and subtitle packets: stop time of frame/subtitle
-    int           new_chap;     // Video packets: ???
+    int           new_chap;     // Video packets: if non-zero, is the index of the chapter whose boundary was crossed
 
 #define HB_FRAME_IDR    0x01
 #define HB_FRAME_I      0x02