ijkioapplication: pass through event to upper layer

ijkmedia/ijkplayer/ff_ffplay.c

@@ -3437,7 +3437,7 @@ static int ijkio_app_func_event(IjkIOApplicationContext *h, int message ,void *d
         ffp->stat.cache_count_bytes       = statistic->cache_count_bytes;
     }
 
-    return 0;
+    return inject_callback(ffp->inject_opaque, IJKIOAPP_EVENT_CACHE_STATISTIC, data, size);
 }
 
 void *ffp_set_ijkio_inject_opaque(FFPlayer *ffp, void *opaque)

ijkmedia/ijkplayer/ijkavformat/ijkioapplication.h

@@ -27,7 +27,7 @@
 #include <stdint.h>
 
 #define CACHE_FILE_PATH_MAX_LEN        512
-#define IJKIOAPP_EVENT_CACHE_STATISTIC 0x1003  //IJKIOAppCacheStatistic
+#define IJKIOAPP_EVENT_CACHE_STATISTIC 0x1003  //IJKIOAppCacheStatistic share with avutil/application.h
 
 typedef struct IjkIOAppCacheStatistic {
     int64_t cache_physical_pos;