| spandsp 0.0.6
    | 
Go to the source code of this file.
| Typedefs | |
| typedef void(* | qam_report_handler_t) (void *user_data, const complexf_t *constel, const complexf_t *target, int symbol) | 
| typedef struct v29_rx_state_s | v29_rx_state_t | 
| Functions | |
| v29_rx_state_t * | v29_rx_init (v29_rx_state_t *s, int bit_rate, put_bit_func_t put_bit, void *user_data) | 
| Initialise a V.29 modem receive context. | |
| int | v29_rx_restart (v29_rx_state_t *s, int bit_rate, int old_train) | 
| Reinitialise an existing V.29 modem receive context. | |
| int | v29_rx_release (v29_rx_state_t *s) | 
| Release a V.29 modem receive context. | |
| int | v29_rx_free (v29_rx_state_t *s) | 
| Free a V.29 modem receive context. | |
| logging_state_t * | v29_rx_get_logging_state (v29_rx_state_t *s) | 
| Get the logging context associated with a V.29 modem receive context. | |
| void | v29_rx_set_put_bit (v29_rx_state_t *s, put_bit_func_t put_bit, void *user_data) | 
| Change the put_bit function associated with a V.29 modem receive context. | |
| void | v29_rx_set_modem_status_handler (v29_rx_state_t *s, modem_status_func_t handler, void *user_data) | 
| Change the modem status report function associated with a V.29 modem receive context. | |
| SPAN_DECLARE_NONSTD (int) v29_rx(v29_rx_state_t *s | |
| Process a block of received V.29 modem audio samples. | |
| int | v29_rx_equalizer_state (v29_rx_state_t *s, complexf_t **coeffs) | 
| Get a snapshot of the current equalizer coefficients. | |
| float | v29_rx_carrier_frequency (v29_rx_state_t *s) | 
| float | v29_rx_symbol_timing_correction (v29_rx_state_t *s) | 
| float | v29_rx_signal_power (v29_rx_state_t *s) | 
| void | v29_rx_signal_cutoff (v29_rx_state_t *s, float cutoff) | 
| void | v29_rx_set_qam_report_handler (v29_rx_state_t *s, qam_report_handler_t handler, void *user_data) | 
| Variables | |
| const int16_t | amp [] | 
| const int16_t int | len | 
| typedef struct v29_rx_state_s v29_rx_state_t | 
V.29 modem receive side descriptor. This defines the working state for a single instance of a V.29 modem receiver.
| SPAN_DECLARE_NONSTD | ( | int | ) | 
Process a block of received V.29 modem audio samples.
Get the next bit of data from a T.38 rate adapting non-ECM buffer context.
Get a bit of received non-ECM image data.
Get the next bit of a transmitted serial bit stream.
Fake processing of a missing block of received V.29 modem audio samples.
Process a block of received V.29 modem audio samples.
| s | The modem context. | 
| amp | The audio sample buffer. | 
| len | The number of samples in the buffer. | 
Fake processing of a missing block of received V.29 modem audio samples. (e.g due to packet loss).
| s | The modem context. | 
| len | The number of samples to fake. | 
| float v29_rx_carrier_frequency | ( | v29_rx_state_t * | s | ) | 
Get the current received carrier frequency.
| s | The modem context. | 
References v29_rx_state_s::carrier_phase_rate, and dds_frequencyf().
| int v29_rx_equalizer_state | ( | v29_rx_state_t * | s, | 
| complexf_t ** | coeffs | ||
| ) | 
Get a snapshot of the current equalizer coefficients.
Get a snapshot of the current equalizer coefficients.
| s | The modem context. | 
| coeffs | The vector of complex coefficients. | 
References v29_rx_state_s::eq_coeff.
| int v29_rx_free | ( | v29_rx_state_t * | s | ) | 
Free a V.29 modem receive context.
Free a V.29 modem receive context.
| s | The modem context. | 
| logging_state_t * v29_rx_get_logging_state | ( | v29_rx_state_t * | s | ) | 
Get the logging context associated with a V.29 modem receive context.
Get the logging context associated with a V.29 modem receive context.
| s | The modem context. | 
References v29_rx_state_s::logging.
| v29_rx_state_t * v29_rx_init | ( | v29_rx_state_t * | s, | 
| int | bit_rate, | ||
| put_bit_func_t | put_bit, | ||
| void * | user_data | ||
| ) | 
Initialise a V.29 modem receive context.
Initialise a V.29 modem receive context.
| s | The modem context. | 
| bit_rate | The bit rate of the modem. Valid values are 4800, 7200 and 9600. | 
| put_bit | The callback routine used to put the received data. | 
| user_data | An opaque pointer passed to the put_bit routine. | 
References v29_rx_state_s::logging, v29_rx_state_s::put_bit, v29_rx_state_s::put_bit_user_data, v29_rx_restart(), and v29_rx_signal_cutoff().
| int v29_rx_release | ( | v29_rx_state_t * | s | ) | 
Release a V.29 modem receive context.
Release a V.29 modem receive context.
| s | The modem context. | 
| int v29_rx_restart | ( | v29_rx_state_t * | s, | 
| int | bit_rate, | ||
| int | old_train | ||
| ) | 
Reinitialise an existing V.29 modem receive context.
Reinitialise an existing V.29 modem receive context.
| s | The modem context. | 
| bit_rate | The bit rate of the modem. Valid values are 4800, 7200 and 9600. | 
| old_train | TRUE if a previous trained values are to be reused. | 
References v29_rx_state_s::agc_scaling, v29_rx_state_s::agc_scaling_save, v29_rx_state_s::baud_half, v29_rx_state_s::baud_phase, v29_rx_state_s::bit_rate, v29_rx_state_s::carrier_drop_pending, CARRIER_NOMINAL_FREQ, v29_rx_state_s::carrier_phase, v29_rx_state_s::carrier_phase_rate, v29_rx_state_s::carrier_phase_rate_save, v29_rx_state_s::carrier_track_i, v29_rx_state_s::carrier_track_p, v29_rx_state_s::constellation_state, v29_rx_state_s::eq_skip, v29_rx_state_s::high_sample, v29_rx_state_s::last_sample, v29_rx_state_s::low_samples, v29_rx_state_s::old_train, v29_rx_state_s::power, power_meter_init(), v29_rx_state_s::rrc_filter, v29_rx_state_s::rrc_filter_step, v29_rx_state_s::scramble_reg, v29_rx_state_s::signal_present, v29_rx_state_s::symbol_sync_dc_filter, v29_rx_state_s::symbol_sync_high, v29_rx_state_s::symbol_sync_low, v29_rx_state_s::total_baud_timing_correction, v29_rx_state_s::training_cd, v29_rx_state_s::training_count, v29_rx_state_s::training_scramble_reg, and v29_rx_state_s::training_stage.
Referenced by v29_rx_init().
| void v29_rx_set_modem_status_handler | ( | v29_rx_state_t * | s, | 
| modem_status_func_t | handler, | ||
| void * | user_data | ||
| ) | 
Change the modem status report function associated with a V.29 modem receive context.
Change the modem status report function associated with a V.29 modem receive context.
| s | The modem context. | 
| handler | The callback routine used to report modem status changes. | 
| user_data | An opaque pointer. | 
References v29_rx_state_s::status_handler, and v29_rx_state_s::status_user_data.
| void v29_rx_set_put_bit | ( | v29_rx_state_t * | s, | 
| put_bit_func_t | put_bit, | ||
| void * | user_data | ||
| ) | 
Change the put_bit function associated with a V.29 modem receive context.
Change the put_bit function associated with a V.29 modem receive context.
| s | The modem context. | 
| put_bit | The callback routine used to handle received bits. | 
| user_data | An opaque pointer. | 
References v29_rx_state_s::put_bit, and v29_rx_state_s::put_bit_user_data.
| void v29_rx_set_qam_report_handler | ( | v29_rx_state_t * | s, | 
| qam_report_handler_t | handler, | ||
| void * | user_data | ||
| ) | 
Set a handler routine to process QAM status reports
| s | The modem context. | 
| handler | The handler routine. | 
| user_data | An opaque pointer passed to the handler routine. | 
References v29_rx_state_s::qam_report, and v29_rx_state_s::qam_user_data.
| void v29_rx_signal_cutoff | ( | v29_rx_state_t * | s, | 
| float | cutoff | ||
| ) | 
Set the power level at which the carrier detection will cut in
| s | The modem context. | 
| cutoff | The signal cutoff power, in dBm0. | 
References v29_rx_state_s::carrier_off_power, v29_rx_state_s::carrier_on_power, and power_meter_level_dbm0().
Referenced by v29_rx_init().
| float v29_rx_signal_power | ( | v29_rx_state_t * | s | ) | 
Get the current received signal power.
| s | The modem context. | 
References v29_rx_state_s::power, and power_meter_current_dbm0().
| float v29_rx_symbol_timing_correction | ( | v29_rx_state_t * | s | ) | 
Get the current symbol timing correction since startup.
| s | The modem context. | 
References v29_rx_state_s::total_baud_timing_correction.