nut: Support experimental NUT 4 features

Add the low overhead pipe mode and the extended broadcast mode.
Export the options as 'syncponts' since it impacts only that.

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

1 files changed, 8 insertions, 1 deletions

diff --git a/libavformat/nut.h b/libavformat/nut.h
index 6357b3d2b1..16f3c123a1 100644
--- a/libavformat/nut.h
+++ b/libavformat/nut.h
@@ -36,7 +36,9 @@
 
 #define MAX_DISTANCE (1024*32-1)
 
-#define NUT_VERSION 3
+#define NUT_MAX_VERSION 4
+#define NUT_STABLE_VERSION 3
+#define NUT_MIN_VERSION 2
 
 typedef enum{
     FLAG_KEY        =   1, ///<if set, frame is keyframe
@@ -85,6 +87,7 @@ typedef struct ChapterContext {
 } ChapterContext;
 
 typedef struct NUTContext {
+    const AVClass *av_class;
     AVFormatContext *avf;
 //    int written_packet_size;
 //    int64_t packet_start;
@@ -100,6 +103,10 @@ typedef struct NUTContext {
     int header_count;
     AVRational *time_base;
     struct AVTreeNode *syncpoints;
+#define NUT_BROADCAST 1 // use extended syncpoints
+#define NUT_PIPE 2      // do not write syncpoints
+    int flags;
+    int version; // version currently in use
 } NUTContext;
 
 extern const AVCodecTag ff_nut_subtitle_tags[];