Type Definition flac_sys::FLAC__StreamEncoderSeekCallback

type FLAC__StreamEncoderSeekCallback = Option<unsafe extern "C" fn(encoder: *const FLAC__StreamEncoder, absolute_byte_offset: FLAC__uint64, client_data: *mut c_void) -> FLAC__StreamEncoderSeekStatus>;

Signature for the seek callback.

A function pointer matching this signature may be passed to FLAC__stream_encoder_init*_stream(). The supplied function will be called when the encoder needs to seek the output stream. The encoder will pass the absolute byte offset to seek to, 0 meaning the beginning of the stream.

Here is an example of a seek callback for stdio streams: \code FLAC__StreamEncoderSeekStatus seek_cb(const FLAC__StreamEncoder *encoder, FLAC__uint64 absolute_byte_offset, void *client_data) { FILE file = ((MyClientData)client_data)->file; if(file == stdin) return FLAC__STREAM_ENCODER_SEEK_STATUS_UNSUPPORTED; else if(fseeko(file, (off_t)absolute_byte_offset, SEEK_SET) < 0) return FLAC__STREAM_ENCODER_SEEK_STATUS_ERROR; else return FLAC__STREAM_ENCODER_SEEK_STATUS_OK; } \endcode

\note In general, FLAC__StreamEncoder functions which change the state should not be called on the \a encoder while in the callback.

\param encoder The encoder instance calling the callback. \param absolute_byte_offset The offset from the beginning of the stream to seek to. \param client_data The callee's client data set through FLAC__stream_encoder_init_*(). \retval FLAC__StreamEncoderSeekStatus The callee's return status.