spandsp 3.0.0
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Macros | |
#define | V22BIS_CONSTELLATION_SCALING_FACTOR 1.0 |
Typedefs | |
typedef struct v22bis_state_s | v22bis_state_t |
Enumerations | |
enum | v22bis_options_t { V22BIS_GUARD_TONE_NONE = 0 , V22BIS_GUARD_TONE_550HZ = 1 , V22BIS_GUARD_TONE_1800HZ = 2 , V22BIS_BELL212A_COMPATIBILITY_MODE = 0x100 , V22BIS_USE_U00 = 0x200 } |
Functions | |
int | v22bis_rx (v22bis_state_t *s, const int16_t amp[], int len) |
Process a block of received V.22bis modem audio samples. | |
int | v22bis_rx_fillin (v22bis_state_t *s, int len) |
Fake processing of a missing 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_set_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) |
int | v22bis_tx (v22bis_state_t *s, int16_t amp[], int len) |
Generate a block of V.22bis modem audio samples. | |
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, bool 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 options, bool calling_party, span_get_bit_func_t get_bit, void *get_bit_user_data, span_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, span_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, span_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, span_modem_status_func_t handler, void *user_data) |
Change the modem status report function associated with a V.22bis modem receive context. | |
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.
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 | options, | ||
bool | calling_party, | ||
span_get_bit_func_t | get_bit, | ||
void * | get_bit_user_data, | ||
span_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. |
options | Guard tone and other options. |
calling_party | True if this is the calling modem. |
get_bit | The callback routine used to get the data to be transmitted. |
get_bit_user_data | An opaque pointer, passed in calls to the get_bit routine. |
put_bit | The callback routine used to put the data received. |
put_bit_user_data | An opaque pointer, passed in calls to the put_bit routine. |
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_tone_phase_rate, v22bis_state_s::logging, v22bis_state_s::options, 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, |
bool | 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(), and v22bis_rx().
int v22bis_rx | ( | v22bis_state_t * | s, |
const int16_t | amp[], | ||
int | len ) |
Process a 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. |
References v22bis_state_s::agc_scaling, v22bis_state_s::bit_rate, v22bis_state_s::calling_party, v22bis_state_s::carrier_phase, v22bis_state_s::carrier_phase_rate, dds_advance(), dds_advancef(), dds_lookup_complexf(), dds_lookup_complexi16(), v22bis_state_s::eq_put_step, complexi16_t::im, power_meter_update(), PULSESHAPER_COEFF_SETS, complexi16_t::re, v22bis_state_s::rrc_filter, v22bis_state_s::rrc_filter_step, v22bis_state_s::rx_power, SIG_STATUS_CARRIER_DOWN, SIG_STATUS_CARRIER_UP, v22bis_state_s::signal_present, v22bis_state_s::training, and v22bis_restart().
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.
int v22bis_rx_fillin | ( | v22bis_state_t * | s, |
int | len ) |
Fake processing of a missing block of received V.22bis modem audio samples.
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. |
References v22bis_state_s::carrier_phase, v22bis_state_s::carrier_phase_rate, dds_advance(), dds_advancef(), v22bis_state_s::logging, v22bis_state_s::signal_present, and span_log().
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_set_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, |
span_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, |
span_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, |
span_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.
int v22bis_tx | ( | v22bis_state_t * | s, |
int16_t | amp[], | ||
int | len ) |
Generate a block of V.22bis modem audio samples.
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. |
References v22bis_state_s::baud_phase, v22bis_state_s::carrier_phase, v22bis_state_s::carrier_phase_rate, dds_complexf(), dds_complexi32(), dds_mod(), dds_modf(), v22bis_state_s::gain, v22bis_state_s::guard_tone_gain, v22bis_state_s::guard_tone_phase, v22bis_state_s::guard_tone_phase_rate, complexi16_t::im, complexi32_t::im, complexi16_t::re, complexi32_t::re, v22bis_state_s::rrc_filter_re, v22bis_state_s::rrc_filter_step, and v22bis_state_s::shutdown.
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_tone_gain, and v22bis_state_s::guard_tone_phase_rate.
Referenced by v22bis_init().