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-rw-r--r--libavutil/fifo.h3
1 files changed, 2 insertions, 1 deletions
diff --git a/libavutil/fifo.h b/libavutil/fifo.h
index a904dfd02e..68ed064c1d 100644
--- a/libavutil/fifo.h
+++ b/libavutil/fifo.h
@@ -81,7 +81,8 @@ int av_fifo_generic_read(AVFifoBuffer *f, void *dest, int buf_size, void (*func)
/**
* Feeds data from a user-supplied callback to an AVFifoBuffer.
* @param *f AVFifoBuffer to write to
- * @param *src data source
+ * @param *src data source; non-const since it may be used as a
+ * modifiable context by the function defined in func
* @param size number of bytes to write
* @param *func generic write function; the first parameter is src,
* the second is dest_buf, the third is dest_buf_size.