avcodec: Allow locking and unlocking an avformat specific mutex

This extends the lock manager in avcodec to manage two separate
mutexes via the user-specified lock functions.

Signed-off-by: Martin Storsjö <martin@martin.st>

1 files changed, 23 insertions, 0 deletions

diff --git a/libavcodec/utils.c b/libavcodec/utils.c
index 35c9eebc3a..cd8dce91fc 100644
--- a/libavcodec/utils.c
+++ b/libavcodec/utils.c
@@ -48,6 +48,7 @@
 static int volatile entangled_thread_counter=0;
 static int (*ff_lockmgr_cb)(void **mutex, enum AVLockOp op);
 static void *codec_mutex;
+static void *avformat_mutex;
 
 void *av_fast_realloc(void *ptr, unsigned int *size, size_t min_size)
 {
@@ -1270,6 +1271,8 @@ int av_lockmgr_register(int (*cb)(void **mutex, enum AVLockOp op))
     if (ff_lockmgr_cb) {
         if (ff_lockmgr_cb(&codec_mutex, AV_LOCK_DESTROY))
             return -1;
+        if (ff_lockmgr_cb(&avformat_mutex, AV_LOCK_DESTROY))
+            return -1;
     }
 
     ff_lockmgr_cb = cb;
@@ -1277,6 +1280,26 @@ int av_lockmgr_register(int (*cb)(void **mutex, enum AVLockOp op))
     if (ff_lockmgr_cb) {
         if (ff_lockmgr_cb(&codec_mutex, AV_LOCK_CREATE))
             return -1;
+        if (ff_lockmgr_cb(&avformat_mutex, AV_LOCK_CREATE))
+            return -1;
+    }
+    return 0;
+}
+
+int avpriv_lock_avformat(void)
+{
+    if (ff_lockmgr_cb) {
+        if ((*ff_lockmgr_cb)(&avformat_mutex, AV_LOCK_OBTAIN))
+            return -1;
+    }
+    return 0;
+}
+
+int avpriv_unlock_avformat(void)
+{
+    if (ff_lockmgr_cb) {
+        if ((*ff_lockmgr_cb)(&avformat_mutex, AV_LOCK_RELEASE))
+            return -1;
     }
     return 0;
 }