[FFmpeg-devel] av_mallocz_array

[Christophe GARNIER]

Hello,

To build makemkv version 1.17.3 (makemkv-oss), I retreived he sources of 
ffmpeg from the git repository (git clone 
https://git.ffmpeg.org/ffmpeg.git ffmpeg).It appeared that the function 
av_mallocz_array is not present into libavutil/mem.c and libavutil/mem.h.

I had the following code into libavutil/mem.c :

void *av_mallocz_array(size_t nmemb, size_t size)
{
    size_t result;
    if (size_mult(nmemb, size, &result) < 0)
        return NULL;
    return av_mallocz(result);
}

and into libavutil/mem.h :

/**
* Allocate a memory block for an array with av_mallocz().
*
* The allocated memory will have size `size * nmemb` bytes.
*
* @param nmemb Number of elements
* @param size  Size of the single element
* @return Pointer to the allocated block, or `NULL` if the block cannot
*         be allocated
*
* @see av_mallocz()
* @see av_malloc_array()
*/
av_alloc_size(1, 2) void *av_mallocz_array(size_t nmemb, size_t size);

After these modifications, I have been able to generate makemkv-oss.

BRs

Christophe GARNIER