Function av_encryption_info_alloc

pub unsafe extern "C" fn av_encryption_info_alloc(
    subsample_count: u32,
    key_id_size: u32,
    iv_size: u32,
) -> *mut AVEncryptionInfo

Allocates an AVEncryptionInfo structure and sub-pointers to hold the given number of subsamples. This will allocate pointers for the key ID, IV, and subsample entries, set the size members, and zero-initialize the rest.

@param subsample_count The number of subsamples. @param key_id_size The number of bytes in the key ID, should be 16. @param iv_size The number of bytes in the IV, should be 16.

@return The new AVEncryptionInfo structure, or NULL on error.