Function rsmpeg::ffi::av_fast_malloc

pub unsafe extern "C" fn av_fast_malloc(
    ptr: *mut c_void, 
    size: *mut u32, 
    min_size: u32
)

Allocate a buffer, reusing the given one if large enough.

Contrary to av_fast_realloc(), the current buffer contents might not be preserved and on error the old buffer is freed, thus no special handling to avoid memleaks is necessary.

*ptr is allowed to be NULL, in which case allocation always happens if size_needed is greater than 0.

@code{.c} uint8_t *buf = …; av_fast_malloc(&buf, &current_size, size_needed); if (!buf) { // Allocation failed; buf already freed return AVERROR(ENOMEM); } @endcode

@param[in,out] ptr Pointer to pointer to an already allocated buffer. *ptr will be overwritten with pointer to new buffer on success or NULL on failure @param[in,out] size Pointer to the size of buffer *ptr. *size is updated to the new allocated size, in particular 0 in case of failure. @param[in] min_size Desired minimal size of buffer *ptr @see av_realloc() @see av_fast_mallocz()