fifo: add av_fifo_grow()

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

1 files changed, 11 insertions, 0 deletions

diff --git a/libavutil/fifo.h b/libavutil/fifo.h
index 22a9aa5d18..515f0980a7 100644
--- a/libavutil/fifo.h
+++ b/libavutil/fifo.h
@@ -103,6 +103,17 @@ int av_fifo_generic_write(AVFifoBuffer *f, void *src, int size, int (*func)(void
 int av_fifo_realloc2(AVFifoBuffer *f, unsigned int size);
 
 /**
+ * Enlarge an AVFifoBuffer.
+ * In case of reallocation failure, the old FIFO is kept unchanged.
+ * The new fifo size may be larger than the requested size.
+ *
+ * @param f AVFifoBuffer to resize
+ * @param additional_space the amount of space in bytes to allocate in addition to av_fifo_size()
+ * @return <0 for failure, >=0 otherwise
+ */
+int av_fifo_grow(AVFifoBuffer *f, unsigned int additional_space);
+
+/**
  * Read and discard the specified amount of data from an AVFifoBuffer.
  * @param f AVFifoBuffer to read from
  * @param size amount of data to read in bytes