diff options
Diffstat (limited to 'include/osmocom')
| -rw-r--r-- | include/osmocom/core/conv.h | 31 |
1 files changed, 25 insertions, 6 deletions
diff --git a/include/osmocom/core/conv.h b/include/osmocom/core/conv.h index ba490b45..159a055b 100644 --- a/include/osmocom/core/conv.h +++ b/include/osmocom/core/conv.h @@ -35,6 +35,19 @@ #include <osmocom/core/bits.h> +/*! \brief possibe termination types + * + * The termination type will determine which state the encoder/decoder + * can start/end with. This is mostly taken care of in the high level API + * call. So if you use the low level API, you must take care of making the + * proper calls yourself. + */ +enum osmo_conv_term { + CONV_TERM_FLUSH = 0, /*!< \brief Flush encoder state */ + CONV_TERM_TRUNCATION, /*!< \brief Direct truncation */ + CONV_TERM_TAIL_BITING, /*!< \brief Tail biting */ +}; + /*! \brief structure describing a given convolutional code * * The only required fields are N,K and the next_output/next_state arrays. The @@ -46,6 +59,8 @@ struct osmo_conv_code { int K; /*!< \brief Constraint length */ int len; /*!< \brief # of data bits */ + enum osmo_conv_term term; /*!< \brief Termination type */ + const uint8_t (*next_output)[2];/*!< \brief Next output array */ const uint8_t (*next_state)[2]; /*!< \brief Next state array */ @@ -70,9 +85,11 @@ struct osmo_conv_encoder { void osmo_conv_encode_init(struct osmo_conv_encoder *encoder, const struct osmo_conv_code *code); +void osmo_conv_encode_load_state(struct osmo_conv_encoder *encoder, + const ubit_t *input); int osmo_conv_encode_raw(struct osmo_conv_encoder *encoder, const ubit_t *input, ubit_t *output, int n); -int osmo_conv_encode_finish(struct osmo_conv_encoder *encoder, ubit_t *output); +int osmo_conv_encode_flush(struct osmo_conv_encoder *encoder, ubit_t *output); /* All-in-one */ int osmo_conv_encode(const struct osmo_conv_code *code, @@ -100,16 +117,18 @@ struct osmo_conv_decoder { }; void osmo_conv_decode_init(struct osmo_conv_decoder *decoder, - const struct osmo_conv_code *code, int len); -void osmo_conv_decode_reset(struct osmo_conv_decoder *decoder); + const struct osmo_conv_code *code, + int len, int start_state); +void osmo_conv_decode_reset(struct osmo_conv_decoder *decoder, int start_state); +void osmo_conv_decode_rewind(struct osmo_conv_decoder *decoder); void osmo_conv_decode_deinit(struct osmo_conv_decoder *decoder); int osmo_conv_decode_scan(struct osmo_conv_decoder *decoder, const sbit_t *input, int n); -int osmo_conv_decode_finish(struct osmo_conv_decoder *decoder, - const sbit_t *input); +int osmo_conv_decode_flush(struct osmo_conv_decoder *decoder, + const sbit_t *input); int osmo_conv_decode_get_output(struct osmo_conv_decoder *decoder, - ubit_t *output, int has_finish); + ubit_t *output, int has_flush, int end_state); /* All-in-one */ int osmo_conv_decode(const struct osmo_conv_code *code, |