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_SILENCE,
59 V22BIS_TX_TRAINING_STAGE_INITIAL_TIMED_SILENCE,
60 V22BIS_TX_TRAINING_STAGE_U11,
61 V22BIS_TX_TRAINING_STAGE_U00,
62 V22BIS_TX_TRAINING_STAGE_U0011,
63 V22BIS_TX_TRAINING_STAGE_S11,
64 V22BIS_TX_TRAINING_STAGE_TIMED_S11,
65 V22BIS_TX_TRAINING_STAGE_S1111,
66 V22BIS_TX_TRAINING_STAGE_PARKED
69#if defined(SPANDSP_USE_FIXED_POINT)
72extern const complexf_t v22bis_constellation[16];
100 int negotiated_bit_rate;
143#if defined(SPANDSP_USE_FIXED_POINT)
199 int sixteen_way_decisions;
208#if defined(SPANDSP_USE_FIXED_POINT)
215 int16_t rrc_filter_im[V22BIS_TX_FILTER_STEPS];
223 float rrc_filter_im[V22BIS_TX_FILTER_STEPS];
261#if defined(__cplusplus)
276#if defined(__cplusplus)
int(* span_get_bit_func_t)(void *user_data)
Definition async.h:127
void(* span_modem_status_func_t)(void *user_data, int status)
Definition async.h:131
void(* span_put_bit_func_t)(void *user_data, int bit)
Definition async.h:123
struct logging_state_s logging_state_t
Definition logging.h:72
Definition private/v22bis.h:80
logging_state_t logging
Error and flow logging control.
Definition private/v22bis.h:258
int baud_phase
The current fractional phase of the baud timing.
Definition private/v22bis.h:197
int bit_rate
The maximum permitted bit rate of the modem. Valid values are 1200 and 2400.
Definition private/v22bis.h:82
float guard_tone_gain
The guard tone level.
Definition private/v22bis.h:218
float rrc_filter_re[9]
The root raised cosine (RRC) pulse shaping filter buffer.
Definition private/v22bis.h:222
int eq_put_step
Current write offset into the equalizer buffer.
Definition private/v22bis.h:187
float rrc_filter[27]
The root raised cosine (RRC) pulse shaping filter buffer.
Definition private/v22bis.h:167
qam_report_handler_t qam_report
A callback function which may be enabled to report every symbol's constellation position.
Definition private/v22bis.h:129
int constellation_state
The code number for the current position in the constellation.
Definition private/v22bis.h:141
complexf_t eq_coeff[17]
The adaptive equalizer coefficients.
Definition private/v22bis.h:172
int training_count
A count of how far through the current training step we are.
Definition private/v22bis.h:117
float gain
The gain factor needed to achieve the specified output power.
Definition private/v22bis.h:220
void * status_user_data
A user specified opaque pointer passed to the status function.
Definition private/v22bis.h:98
int scrambler_pattern_count
A counter for the number of consecutive bits of repeating pattern through the scrambler.
Definition private/v22bis.h:112
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:195
void * qam_user_data
A user specified opaque pointer passed to the qam_report callback routine.
Definition private/v22bis.h:132
bool calling_party
True if this is the calling side modem.
Definition private/v22bis.h:86
int32_t guard_tone_phase_rate
The update rate for the phase of the guard tone (i.e. the DDS increment).
Definition private/v22bis.h:246
int shutdown
An indicator to mark that we are tidying up to stop transmission.
Definition private/v22bis.h:252
void * put_bit_user_data
A user specified opaque pointer passed to the put_bit callback routine.
Definition private/v22bis.h:94
int gardner_integrate
Integration variable for damping the Gardner algorithm tests.
Definition private/v22bis.h:190
float eq_delta
The current delta factor for updating the equalizer coefficients.
Definition private/v22bis.h:170
span_get_bit_func_t get_bit
The callback function used to get the next bit to be transmitted.
Definition private/v22bis.h:88
span_get_bit_func_t current_get_bit
The get_bit function in use at any instant.
Definition private/v22bis.h:254
int training
0 if receiving user data. A training stage value during training
Definition private/v22bis.h:115
int32_t carrier_on_power
The power meter level at which carrier on is declared.
Definition private/v22bis.h:137
power_meter_t rx_power
A power meter, to measure the HPF'ed signal power in the channel.
Definition private/v22bis.h:135
float carrier_track_p
The proportional part of the carrier tracking filter.
Definition private/v22bis.h:180
uint32_t guard_tone_phase
The current phase of the guard tone (i.e. the DDS parameter).
Definition private/v22bis.h:244
float agc_scaling
The scaling factor assessed by the AGC algorithm.
Definition private/v22bis.h:165
uint32_t carrier_phase
The current phase of the carrier (i.e. the DDS parameter).
Definition private/v22bis.h:123
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:120
span_modem_status_func_t status_handler
The callback function used to report modem status changes.
Definition private/v22bis.h:96
int options
Guard tone and sundry flags.
Definition private/v22bis.h:84
int eq_step
Current offset into the equalizer buffer.
Definition private/v22bis.h:185
int gardner_step
Current step size of Gardner algorithm integration.
Definition private/v22bis.h:192
uint32_t scramble_reg
The register for the data scrambler.
Definition private/v22bis.h:109
int rrc_filter_step
Current offset into the RRC pulse shaping filter buffer.
Definition private/v22bis.h:106
void * get_bit_user_data
A user specified opaque pointer passed to the get_bit callback routine.
Definition private/v22bis.h:90
int32_t carrier_phase_rate
The update rate for the phase of the carrier (i.e. the DDS increment).
Definition private/v22bis.h:125
int32_t carrier_off_power
The power meter level at which carrier off is declared.
Definition private/v22bis.h:139
span_put_bit_func_t put_bit
The callback function used to put each bit received.
Definition private/v22bis.h:92
complexf_t eq_buf[17]
The equalizer signal buffer.
Definition private/v22bis.h:174
float training_error
A measure of how much mismatch there is between the real constellation, and the decoded symbol positi...
Definition private/v22bis.h:178
float carrier_track_i
The integral part of the carrier tracking filter.
Definition private/v22bis.h:182
struct v22bis_state_s v22bis_state_t
Definition v22bis.h:83