mov: support random access point grouping

Frames described by this grouping are the starter of a closed or
an open GOP.
This is useful for open GOP of H.264 stream which is not described
by sync sample atom.

Signed-off-by: Luca Barbato <lu_zero@gentoo.org>

1 files changed, 7 insertions, 0 deletions

diff --git a/libavformat/isom.h b/libavformat/isom.h
index a766326082..b191699711 100644
--- a/libavformat/isom.h
+++ b/libavformat/isom.h
@@ -87,6 +87,11 @@ typedef struct {
     unsigned flags;
 } MOVTrackExt;
 
+typedef struct {
+    unsigned int count;
+    unsigned int index;
+} MOVSbgp;
+
 typedef struct MOVStreamContext {
     AVIOContext *pb;
     int ffindex;          ///< AVStream index
@@ -128,6 +133,8 @@ typedef struct MOVStreamContext {
     int has_palette;
     int64_t data_size;
     int64_t track_end;    ///< used for dts generation in fragmented movie files
+    unsigned int rap_group_count;
+    MOVSbgp *rap_group;
 } MOVStreamContext;
 
 typedef struct MOVContext {