t <i>ctx</i>.</p>

<p>OSSL_DECODER_CTX_add_decoder() populates the <b>OSSL_DECODER_CTX</b> <i>ctx</i> with a decoder, to be used to attempt to decode some encoded input.</p>

<p>OSSL_DECODER_CTX_add_extra() finds decoders that generate input for already added decoders, and adds them as well. This is used to build decoder chains.</p>

<p>OSSL_DECODER_CTX_set_input_type() sets the starting input type. This limits the decoder chains to be considered, as explained in the general description above.</p>

<p>OSSL_