avformat: add ff_get_extradata()

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>

1 files changed, 9 insertions, 0 deletions

diff --git a/libavformat/internal.h b/libavformat/internal.h
index edc6a11685..1560e9f44f 100644
--- a/libavformat/internal.h
+++ b/libavformat/internal.h
@@ -372,6 +372,15 @@ int ff_generate_avci_extradata(AVStream *st);
 int ff_alloc_extradata(AVCodecContext *avctx, int size);
 
 /**
+ * Allocate extradata with additional FF_INPUT_BUFFER_PADDING_SIZE at end
+ * which is always set to 0 and fill it from pb.
+ *
+ * @param size size of extradata
+ * @return >= 0 if OK, AVERROR_xxx on error
+ */
+int ff_get_extradata(AVCodecContext *avctx, AVIOContext *pb, int size);
+
+/**
  * add frame for rfps calculation.
  *
  * @param dts timestamp of the i-th frame