| spandsp 0.0.6
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Go to the source code of this file.
| Typedefs | |
| typedef struct v22bis_state_s | v22bis_state_t | 
| Enumerations | |
| enum | { V22BIS_GUARD_TONE_NONE , V22BIS_GUARD_TONE_550HZ , V22BIS_GUARD_TONE_1800HZ } | 
| Functions | |
| SPAN_DECLARE_NONSTD (int) v22bis_rx(v22bis_state_t *s | |
| Process a block of received V.22bis modem audio samples. | |
| int | v22bis_rx_equalizer_state (v22bis_state_t *s, complexf_t **coeffs) | 
| Get a snapshot of the current equalizer coefficients. | |
| float | v22bis_rx_carrier_frequency (v22bis_state_t *s) | 
| float | v22bis_rx_symbol_timing_correction (v22bis_state_t *s) | 
| float | v22bis_rx_signal_power (v22bis_state_t *s) | 
| void | v22bis_rx_signal_cutoff (v22bis_state_t *s, float cutoff) | 
| void | v22bis_rx_set_qam_report_handler (v22bis_state_t *s, qam_report_handler_t handler, void *user_data) | 
| void | v22bis_tx_power (v22bis_state_t *s, float power) | 
| Adjust a V.22bis modem transmit context's output power. | |
| int | v22bis_restart (v22bis_state_t *s, int bit_rate) | 
| Reinitialise an existing V.22bis modem context. | |
| int | v22bis_request_retrain (v22bis_state_t *s, int bit_rate) | 
| Request a retrain for a V.22bis modem context. | |
| int | v22bis_remote_loopback (v22bis_state_t *s, int enable) | 
| Request a loopback 2 for a V.22bis modem context. | |
| int | v22bis_get_current_bit_rate (v22bis_state_t *s) | 
| Report the current operating bit rate of a V.22bis modem context. | |
| v22bis_state_t * | v22bis_init (v22bis_state_t *s, int bit_rate, int guard, int calling_party, get_bit_func_t get_bit, void *get_bit_user_data, put_bit_func_t put_bit, void *put_bit_user_data) | 
| Initialise a V.22bis modem context. | |
| int | v22bis_release (v22bis_state_t *s) | 
| Release a V.22bis modem receive context. | |
| int | v22bis_free (v22bis_state_t *s) | 
| Free a V.22bis modem receive context. | |
| logging_state_t * | v22bis_get_logging_state (v22bis_state_t *s) | 
| Get the logging context associated with a V.22bis modem context. | |
| void | v22bis_set_get_bit (v22bis_state_t *s, get_bit_func_t get_bit, void *user_data) | 
| Change the get_bit function associated with a V.22bis modem context. | |
| void | v22bis_set_put_bit (v22bis_state_t *s, put_bit_func_t put_bit, void *user_data) | 
| Change the put_bit function associated with a V.22bis modem context. | |
| void | v22bis_set_modem_status_handler (v22bis_state_t *s, modem_status_func_t handler, void *user_data) | 
| Change the modem status report function associated with a V.22bis modem receive context. | |
| Variables | |
| const complexf_t | v22bis_constellation [16] | 
| const int16_t | amp [] | 
| const int16_t int | len | 
| typedef struct v22bis_state_s v22bis_state_t | 
V.22bis modem descriptor. This defines the working state for a single instance of a V.22bis modem.
| SPAN_DECLARE_NONSTD | ( | int | ) | 
Process a block of received V.22bis 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.
Generate a block of V.22bis modem audio samples.
Fake processing of a missing block of received V.22bis modem audio samples.
Process a block of received V.22bis 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.22bis modem audio samples. (e.g due to packet loss).
| s | The modem context. | 
| len | The number of samples to fake. | 
Generate a block of V.22bis modem audio samples.
| s | The modem context. | 
| amp | The audio sample buffer. | 
| len | The number of samples to be generated. | 
| int v22bis_free | ( | v22bis_state_t * | s | ) | 
Free a V.22bis modem receive context.
Free a V.22bis modem receive context.
| s | The modem context. | 
| int v22bis_get_current_bit_rate | ( | v22bis_state_t * | s | ) | 
Report the current operating bit rate of a V.22bis modem context.
Report the current operating bit rate of a V.22bis modem context.
| s | The modem context. | 
| logging_state_t * v22bis_get_logging_state | ( | v22bis_state_t * | s | ) | 
Get the logging context associated with a V.22bis modem context.
Get the logging context associated with a V.22bis modem context.
| s | The modem context. | 
References v22bis_state_s::logging.
| v22bis_state_t * v22bis_init | ( | v22bis_state_t * | s, | 
| int | bit_rate, | ||
| int | guard, | ||
| int | calling_party, | ||
| get_bit_func_t | get_bit, | ||
| void * | get_bit_user_data, | ||
| put_bit_func_t | put_bit, | ||
| void * | put_bit_user_data | ||
| ) | 
Initialise a V.22bis modem context.
Initialise a V.22bis modem context. This must be called before the first use of the context, to initialise its contents.
| s | The modem context. | 
| bit_rate | The bit rate of the modem. Valid values are 1200 and 2400. | 
| guard | The guard tone option. 0 = none, 1 = 550Hz, 2 = 1800Hz. | 
| calling_party | TRUE if this is the calling modem. | 
| get_bit | The callback routine used to get the data to be transmitted. | 
| put_bit | The callback routine used to get the data to be transmitted. | 
| user_data | An opaque pointer, passed in calls to the get and put routines. | 
References v22bis_state_s::bit_rate, v22bis_state_s::calling_party, v22bis_state_s::carrier_phase_rate, dds_phase_ratef(), v22bis_state_s::get_bit, v22bis_state_s::get_bit_user_data, v22bis_state_s::guard_phase_rate, v22bis_state_s::logging, v22bis_state_s::put_bit, v22bis_state_s::put_bit_user_data, v22bis_restart(), and v22bis_tx_power().
| int v22bis_release | ( | v22bis_state_t * | s | ) | 
Release a V.22bis modem receive context.
Release a V.22bis modem receive context.
| s | The modem context. | 
| int v22bis_remote_loopback | ( | v22bis_state_t * | s, | 
| int | enable | ||
| ) | 
Request a loopback 2 for a V.22bis modem context.
Request a loopback 2 for a V.22bis modem context.
| s | The modem context. | 
| enable | TRUE to enable loopback, or FALSE to disable it. | 
| int v22bis_request_retrain | ( | v22bis_state_t * | s, | 
| int | bit_rate | ||
| ) | 
Request a retrain for a V.22bis modem context.
Request a retrain for a V.22bis modem context. A rate change may also be requested.
| s | The modem context. | 
| bit_rate | The bit rate of the modem. Valid values are 1200 and 2400. | 
References v22bis_state_s::logging, SIG_STATUS_MODEM_RETRAIN_OCCURRED, span_log(), v22bis_state_s::training, and v22bis_state_s::training_count.
| int v22bis_restart | ( | v22bis_state_t * | s, | 
| int | bit_rate | ||
| ) | 
Reinitialise an existing V.22bis modem context.
Reinitialise an existing V.22bis modem context, so it may be reused.
| s | The modem context. | 
| bit_rate | The bit rate of the modem. Valid values are 1200 and 2400. | 
References v22bis_state_s::bit_rate.
Referenced by v22bis_init().
| float v22bis_rx_carrier_frequency | ( | v22bis_state_t * | s | ) | 
Get the current received carrier frequency.
| s | The modem context. | 
References v22bis_state_s::carrier_phase_rate, and dds_frequencyf().
| int v22bis_rx_equalizer_state | ( | v22bis_state_t * | s, | 
| complexf_t ** | coeffs | ||
| ) | 
Get a snapshot of the current equalizer coefficients.
Get a snapshot of the current equalizer coefficients.
| coeffs | The vector of complex coefficients. | 
References v22bis_state_s::eq_coeff.
| void v22bis_rx_set_qam_report_handler | ( | v22bis_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 v22bis_state_s::qam_report, and v22bis_state_s::qam_user_data.
| void v22bis_rx_signal_cutoff | ( | v22bis_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 v22bis_state_s::carrier_off_power, v22bis_state_s::carrier_on_power, and power_meter_level_dbm0().
Referenced by v22bis_rx_restart().
| float v22bis_rx_signal_power | ( | v22bis_state_t * | s | ) | 
Get a current received signal power.
| s | The modem context. | 
References power_meter_current_dbm0(), and v22bis_state_s::rx_power.
| float v22bis_rx_symbol_timing_correction | ( | v22bis_state_t * | s | ) | 
Get the current symbol timing correction since startup.
| s | The modem context. | 
References PULSESHAPER_COEFF_SETS, and v22bis_state_s::total_baud_timing_correction.
| void v22bis_set_get_bit | ( | v22bis_state_t * | s, | 
| get_bit_func_t | get_bit, | ||
| void * | user_data | ||
| ) | 
Change the get_bit function associated with a V.22bis modem context.
Change the get_bit function associated with a V.22bis modem context.
| s | The modem context. | 
| get_bit | The callback routine used to get the data to be transmitted. | 
| user_data | An opaque pointer. | 
References v22bis_state_s::get_bit, and v22bis_state_s::get_bit_user_data.
| void v22bis_set_modem_status_handler | ( | v22bis_state_t * | s, | 
| modem_status_func_t | handler, | ||
| void * | user_data | ||
| ) | 
Change the modem status report function associated with a V.22bis modem receive context.
Change the modem status report function associated with a V.22bis modem receive context.
| s | The modem context. | 
| handler | The callback routine used to report modem status changes. | 
| user_data | An opaque pointer. | 
References v22bis_state_s::status_handler, and v22bis_state_s::status_user_data.
| void v22bis_set_put_bit | ( | v22bis_state_t * | s, | 
| put_bit_func_t | put_bit, | ||
| void * | user_data | ||
| ) | 
Change the put_bit function associated with a V.22bis modem context.
Change the get_bit function associated with a V.22bis modem context.
| s | The modem context. | 
| put_bit | The callback routine used to process the data received. | 
| user_data | An opaque pointer. | 
References v22bis_state_s::put_bit, and v22bis_state_s::put_bit_user_data.
| void v22bis_tx_power | ( | v22bis_state_t * | s, | 
| float | power | ||
| ) | 
Adjust a V.22bis modem transmit context's output power.
Adjust a V.22bis modem transmit context's power output.
| s | The modem context. | 
| power | The power level, in dBm0 | 
References dds_phase_ratef(), v22bis_state_s::gain, v22bis_state_s::guard_level, and v22bis_state_s::guard_phase_rate.
Referenced by v22bis_init().