Helper function to allocate a block of size * nmemb bytes with
using av_mallocz()
@param nmemb Number of elements
@param size Size of the single element
@return Pointer to the allocated block, NULL if the block cannot
be allocated.
@see av_mallocz()
@see av_malloc_array()
Helper function to allocate a block of size * nmemb bytes with using av_mallocz() @param nmemb Number of elements @param size Size of the single element @return Pointer to the allocated block, NULL if the block cannot be allocated. @see av_mallocz() @see av_malloc_array()