avcodec: add ff_lock/unlock_avcodec functions.

Will be used in future patches, together with the
variable that allows checking whether the lock is held.

Signed-off-by: Reimar Döffinger <Reimar.Doeffinger@gmx.de>

1 files changed, 4 insertions, 0 deletions

diff --git a/libavcodec/internal.h b/libavcodec/internal.h
index 01620fa125..2d3433f434 100644
--- a/libavcodec/internal.h
+++ b/libavcodec/internal.h
@@ -129,6 +129,10 @@ void ff_init_buffer_info(AVCodecContext *s, AVFrame *frame);
  */
 void ff_packet_free_side_data(AVPacket *pkt);
 
+extern volatile int ff_avcodec_locked;
+int ff_lock_avcodec(AVCodecContext *log_ctx);
+int ff_unlock_avcodec(void);
+
 int avpriv_lock_avformat(void);
 int avpriv_unlock_avformat(void);