X-Git-Url: https://git.sesse.net/?a=blobdiff_plain;f=libavformat%2Favio.h;h=76ff7cd81ea7abfbb800c57945519790a852f9fb;hb=a606f27f4c610708fa96e35eed7b7537d3d8f712;hp=19ecd96eb77abaca6f422a209b118673b00977c9;hpb=7f9de7b416c97b96aee2cf9025db382c71756806;p=ffmpeg

diff --git a/libavformat/avio.h b/libavformat/avio.h
index 19ecd96eb77..76ff7cd81ea 100644
--- a/libavformat/avio.h
+++ b/libavformat/avio.h
@@ -452,6 +452,8 @@ void avio_free_directory_entry(AVIODirEntry **entry);
  * @param write_flag Set to 1 if the buffer should be writable, 0 otherwise.
  * @param opaque An opaque pointer to user-specific data.
  * @param read_packet  A function for refilling the buffer, may be NULL.
+ *                     For stream protocols, must never return 0 but rather
+ *                     a proper AVERROR code.
  * @param write_packet A function for writing the buffer contents, may be NULL.
  *        The function may not change the input buffers content.
  * @param seek A function for seeking to specified byte position, may be NULL.