extradata and FF_INPUT_BUFFER_PADDING_SIZE doc

Originally committed as revision 3684 to svn://svn.ffmpeg.org/ffmpeg/trunk
21 years ago · dffcdbb5f6
parent 9286699a67
commit dffcdbb5f6
1 changed files with 2 additions and 0 deletions
--- a/libavcodec/avcodec.h
+++ b/libavcodec/avcodec.h
@ -673,6 +673,8 @@ typedef struct AVCodecContext {
     * mjpeg: huffman tables
     * rv10: additional flags
     * mpeg4: global headers (they can be in the bitstream or here)
+     * the allocated memory should be FF_INPUT_BUFFER_PADDING_SIZE bytes larger
+     * then extradata_size to avoid prolems if its read with the bitstream reader
     * - encoding: set/allocated/freed by lavc.
     * - decoding: set/allocated/freed by user.
     */