The only flag, for now, is AVFMT_EVENT_FLAG_METADATA_UPDATED, which is updated
after each call to
av_read_frame(). This comes with the caveat that, on stream start, it might not
be set properly
as packets might be buffered in AVFormatContext.packet_buffer before being
given to the user
in av_read_frame().
---
doc/APIchanges | 4 ++++
libavformat/avformat.h | 9 +++++++++
libavformat/utils.c | 2 ++
libavformat/version.h | 2 +-
4 files changed, 16 insertions(+), 1 deletion(-)
diff --git a/doc/APIchanges b/doc/APIchanges
index 261993b..a677e42 100644
--- a/doc/APIchanges
+++ b/doc/APIchanges
@@ -13,6 +13,10 @@ libavutil: 2013-12-xx
API changes, most recent first:
+2014-xx-xx - xxxxxxx - lavf 55.21.0 - avformat.h
+ Add AVFormatContext.event_flags for signaling to the user when events
+ have happened in the stream.
+
2014-07-xx - xxxxxxx - lavu 53.19.0 - avstring.h
Make name matching function from lavf public as av_match_name().
diff --git a/libavformat/avformat.h b/libavformat/avformat.h
index ab2081a..356677f 100644
--- a/libavformat/avformat.h
+++ b/libavformat/avformat.h
@@ -1177,6 +1177,15 @@ typedef struct AVFormatContext {
* @see AVCodecContext.strict_std_compliance
*/
int strict_std_compliance;
+
+ /**
+ * Flags for the user to detect events happening on the stream. These
+ * are cleared and set anew after each call to av_read_frame().
+ * A combination of AVFMT_EVENT_FLAG_*.
+ */
+ int event_flags;
+#define AVFMT_EVENT_FLAG_METADATA_UPDATED 0x0001 ///< The call resulted in
updated metadata.
+
/*****************************************************************
* All fields below this line are not part of the public API. They
* may not be used outside of libavformat and can be changed and
diff --git a/libavformat/utils.c b/libavformat/utils.c
index 698fcfe..6d191f1 100644
--- a/libavformat/utils.c
+++ b/libavformat/utils.c
@@ -982,6 +982,8 @@ int av_read_frame(AVFormatContext *s, AVPacket *pkt)
const int genpts = s->flags & AVFMT_FLAG_GENPTS;
int eof = 0;
+ s->event_flags = 0;
+
if (!genpts)
return s->packet_buffer
? read_from_packet_buffer(&s->packet_buffer,
diff --git a/libavformat/version.h b/libavformat/version.h
index 6e9ce67..fbf5a0c 100644
--- a/libavformat/version.h
+++ b/libavformat/version.h
@@ -30,7 +30,7 @@
#include "libavutil/version.h"
#define LIBAVFORMAT_VERSION_MAJOR 55
-#define LIBAVFORMAT_VERSION_MINOR 20
+#define LIBAVFORMAT_VERSION_MINOR 21
#define LIBAVFORMAT_VERSION_MICRO 0
#define LIBAVFORMAT_VERSION_INT AV_VERSION_INT(LIBAVFORMAT_VERSION_MAJOR, \
--
2.0.1
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