DECODER_CTX_set_input_structure() sets the name of the structure that the input is expected to have. This may be used to determines what decoder implementations may be used. NULL is a valid input structure, when it&#39;s not relevant, or when the decoder implementations are expected to figure it out.</p>

<p>OSSL_DECODER_CTX_get_num_decoders() gets the number of decoders currently added to the context <i>ctx</i>.</p>

<p>OSSL_DECODER_CTX_set_construct() sets the constructor <i>construct</i>.</p>

<p>OSSL_DE