Merge commit '3b4feac1ec14f861bdd7f494f288f4d8dd7f449e'

* commit '3b4feac1ec14f861bdd7f494f288f4d8dd7f449e':
  movenc: Keep track of the allocated size for the cluster array
  mem: Add av_realloc_array and av_reallocp_array

Conflicts:
	doc/APIchanges
	libavformat/movenc.c
	libavutil/mem.c
	libavutil/mem.h
	libavutil/version.h

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

1 files changed, 26 insertions, 0 deletions

diff --git a/libavutil/mem.h b/libavutil/mem.h
index a3294690cf..fb23a69094 100644
--- a/libavutil/mem.h
+++ b/libavutil/mem.h
@@ -123,6 +123,32 @@ void *av_realloc(void *ptr, size_t size) av_alloc_size(2);
 void *av_realloc_f(void *ptr, size_t nelem, size_t elsize);
 
 /**
+ * Allocate or reallocate an array.
+ * If ptr is NULL and nmemb > 0, allocate a new block. If
+ * nmemb is zero, free the memory block pointed to by ptr.
+ * @param ptr Pointer to a memory block already allocated with
+ * av_malloc(z)() or av_realloc() or NULL.
+ * @param nmemb Number of elements
+ * @param size Size of the single element
+ * @return Pointer to a newly reallocated block or NULL if the block
+ * cannot be reallocated or the function is used to free the memory block.
+ */
+av_alloc_size(2, 3) void *av_realloc_array(void *ptr, size_t nmemb, size_t size);
+
+/**
+ * Allocate or reallocate an array.
+ * If *ptr is NULL and nmemb > 0, allocate a new block. If
+ * nmemb is zero, free the memory block pointed to by ptr.
+ * @param ptr Pointer to a pointer to a memory block already allocated
+ * with av_malloc(z)() or av_realloc(), or pointer to a pointer to NULL.
+ * The pointer is updated on success, or freed on failure.
+ * @param nmemb Number of elements
+ * @param size Size of the single element
+ * @return Zero on success, an AVERROR error code on failure.
+ */
+av_alloc_size(2, 3) int av_reallocp_array(void *ptr, size_t nmemb, size_t size);
+
+/**
  * Free a memory block which has been allocated with av_malloc(z)() or
  * av_realloc().
  * @param ptr Pointer to the memory block which should be freed.