26 #if !defined(_SPANDSP_PRIVATE_V22BIS_H_)
27 #define _SPANDSP_PRIVATE_V22BIS_H_
30 #define V22BIS_EQUALIZER_LEN 17
32 #define V22BIS_EQUALIZER_PRE_LEN 8
35 #define V22BIS_TX_FILTER_STEPS 9
38 #define V22BIS_RX_FILTER_STEPS 27
43 V22BIS_RX_TRAINING_STAGE_NORMAL_OPERATION,
44 V22BIS_RX_TRAINING_STAGE_SYMBOL_ACQUISITION,
45 V22BIS_RX_TRAINING_STAGE_LOG_PHASE,
46 V22BIS_RX_TRAINING_STAGE_UNSCRAMBLED_ONES,
47 V22BIS_RX_TRAINING_STAGE_UNSCRAMBLED_ONES_SUSTAINING,
48 V22BIS_RX_TRAINING_STAGE_SCRAMBLED_ONES_AT_1200,
49 V22BIS_RX_TRAINING_STAGE_SCRAMBLED_ONES_AT_1200_SUSTAINING,
50 V22BIS_RX_TRAINING_STAGE_WAIT_FOR_SCRAMBLED_ONES_AT_2400,
51 V22BIS_RX_TRAINING_STAGE_PARKED
57 V22BIS_TX_TRAINING_STAGE_NORMAL_OPERATION = 0,
58 V22BIS_TX_TRAINING_STAGE_INITIAL_TIMED_SILENCE,
59 V22BIS_TX_TRAINING_STAGE_INITIAL_SILENCE,
60 V22BIS_TX_TRAINING_STAGE_U11,
61 V22BIS_TX_TRAINING_STAGE_U0011,
62 V22BIS_TX_TRAINING_STAGE_S11,
63 V22BIS_TX_TRAINING_STAGE_TIMED_S11,
64 V22BIS_TX_TRAINING_STAGE_S1111,
65 V22BIS_TX_TRAINING_STAGE_PARKED
68 #if defined(SPANDSP_USE_FIXED_POINT)
71 extern const complexf_t v22bis_constellation[16];
97 int negotiated_bit_rate;
140 #if defined(SPANDSP_USE_FIXED_POINT)
196 int sixteen_way_decisions;
205 #if defined(SPANDSP_USE_FIXED_POINT)
212 int16_t rrc_filter_im[V22BIS_TX_FILTER_STEPS];
220 float rrc_filter_im[V22BIS_TX_FILTER_STEPS];
258 #if defined(__cplusplus)
273 #if defined(__cplusplus)
void(* modem_status_func_t)(void *user_data, int status)
Definition: async.h:113
void(* put_bit_func_t)(void *user_data, int bit)
Definition: async.h:107
int(* get_bit_func_t)(void *user_data)
Definition: async.h:110
Definition: private/logging.h:34
Definition: private/power_meter.h:34
Definition: private/v22bis.h:79
logging_state_t logging
Error and flow logging control.
Definition: private/v22bis.h:255
int baud_phase
The current fractional phase of the baud timing.
Definition: private/v22bis.h:194
int bit_rate
The maximum permitted bit rate of the modem. Valid values are 1200 and 2400.
Definition: private/v22bis.h:81
get_bit_func_t current_get_bit
The get_bit function in use at any instant.
Definition: private/v22bis.h:251
float guard_tone_gain
The guard tone level.
Definition: private/v22bis.h:215
float rrc_filter_re[9]
The root raised cosine (RRC) pulse shaping filter buffer.
Definition: private/v22bis.h:219
int eq_put_step
Current write offset into the equalizer buffer.
Definition: private/v22bis.h:184
float rrc_filter[27]
The root raised cosine (RRC) pulse shaping filter buffer.
Definition: private/v22bis.h:164
qam_report_handler_t qam_report
A callback function which may be enabled to report every symbol's constellation position.
Definition: private/v22bis.h:126
int constellation_state
The code number for the current position in the constellation.
Definition: private/v22bis.h:138
complexf_t eq_coeff[17]
The adaptive equalizer coefficients.
Definition: private/v22bis.h:169
int training_count
A count of how far through the current training step we are.
Definition: private/v22bis.h:114
float gain
The gain factor needed to achieve the specified output power.
Definition: private/v22bis.h:217
void * status_user_data
A user specified opaque pointer passed to the status function.
Definition: private/v22bis.h:95
int scrambler_pattern_count
A counter for the number of consecutive bits of repeating pattern through the scrambler.
Definition: private/v22bis.h:109
int total_baud_timing_correction
The total symbol timing correction since the carrier came up. This is only for performance analysis p...
Definition: private/v22bis.h:192
void * qam_user_data
A user specified opaque pointer passed to the qam_report callback routine.
Definition: private/v22bis.h:129
bool calling_party
True is this is the calling side modem.
Definition: private/v22bis.h:83
int shutdown
An indicator to mark that we are tidying up to stop transmission.
Definition: private/v22bis.h:249
void * put_bit_user_data
A user specified opaque pointer passed to the put_bit callback routine.
Definition: private/v22bis.h:91
int gardner_integrate
Integration variable for damping the Gardner algorithm tests.
Definition: private/v22bis.h:187
float eq_delta
The current delta factor for updating the equalizer coefficients.
Definition: private/v22bis.h:167
int training
0 if receiving user data. A training stage value during training
Definition: private/v22bis.h:112
uint32_t guard_phase
The current phase of the guard tone (i.e. the DDS parameter).
Definition: private/v22bis.h:241
int32_t carrier_on_power
The power meter level at which carrier on is declared.
Definition: private/v22bis.h:134
power_meter_t rx_power
A power meter, to measure the HPF'ed signal power in the channel.
Definition: private/v22bis.h:132
float carrier_track_p
The proportional part of the carrier tracking filter.
Definition: private/v22bis.h:177
float agc_scaling
The scaling factor assessed by the AGC algorithm.
Definition: private/v22bis.h:162
put_bit_func_t put_bit
The callback function used to put each bit received.
Definition: private/v22bis.h:89
uint32_t carrier_phase
The current phase of the carrier (i.e. the DDS parameter).
Definition: private/v22bis.h:120
int signal_present
>0 if a signal above the minimum is present. It may or may not be a V.22bis signal.
Definition: private/v22bis.h:117
modem_status_func_t status_handler
The callback function used to report modem status changes.
Definition: private/v22bis.h:93
int eq_step
Current offset into the equalizer buffer.
Definition: private/v22bis.h:182
int gardner_step
Current step size of Gardner algorithm integration.
Definition: private/v22bis.h:189
uint32_t scramble_reg
The register for the data scrambler.
Definition: private/v22bis.h:106
int rrc_filter_step
Current offset into the RRC pulse shaping filter buffer.
Definition: private/v22bis.h:103
void * get_bit_user_data
A user specified opaque pointer passed to the get_bit callback routine.
Definition: private/v22bis.h:87
int32_t guard_phase_rate
The update rate for the phase of the guard tone (i.e. the DDS increment).
Definition: private/v22bis.h:243
int32_t carrier_phase_rate
The update rate for the phase of the carrier (i.e. the DDS increment).
Definition: private/v22bis.h:122
int32_t carrier_off_power
The power meter level at which carrier off is declared.
Definition: private/v22bis.h:136
get_bit_func_t get_bit
The callback function used to get the next bit to be transmitted.
Definition: private/v22bis.h:85
complexf_t eq_buf[17]
The equalizer signal buffer.
Definition: private/v22bis.h:171
float training_error
A measure of how much mismatch there is between the real constellation, and the decoded symbol positi...
Definition: private/v22bis.h:175
float carrier_track_i
The integral part of the carrier tracking filter.
Definition: private/v22bis.h:179
int v22bis_rx_restart(v22bis_state_t *s)
Reinitialise an existing V.22bis modem receive context.
Definition: v22bis_rx.c:944