avpacket: signal possibly corrupted packets

Use AV_PKT_FLAG_CORRUPT flag to mark packets that might be incomplete
or have errors. Formats that have a mean to validate their packets
should use this flag to deliver such information instead of silently
dropping the packets.

libavcodec/avcodec.h

@@ -791,6 +791,9 @@ typedef struct AVPacket {
     uint8_t *data;
     int   size;
     int   stream_index;
+    /**
+     * A combination of AV_PKT_FLAG values
+     */
     int   flags;
     /**
      * Additional packet data that can be provided by the container.
@@ -831,7 +834,8 @@ typedef struct AVPacket {
      */
     int64_t convergence_duration;
 } AVPacket;
-#define AV_PKT_FLAG_KEY   0x0001
+#define AV_PKT_FLAG_KEY     0x0001 ///< The packet contains a keyframe
+#define AV_PKT_FLAG_CORRUPT 0x0002 ///< The packet content is corrupted
 
 /**
  * Audio Video Frame.

libavcodec/version.h

@@ -22,7 +22,7 @@
 
 #define LIBAVCODEC_VERSION_MAJOR 53
 #define LIBAVCODEC_VERSION_MINOR  7
-#define LIBAVCODEC_VERSION_MICRO  0
+#define LIBAVCODEC_VERSION_MICRO  1
 
 #define LIBAVCODEC_VERSION_INT  AV_VERSION_INT(LIBAVCODEC_VERSION_MAJOR, \
                                                LIBAVCODEC_VERSION_MINOR, \