spandsp 3.0.0
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Go to the source code of this file.
Typedefs | |
typedef struct v17_tx_state_s | v17_tx_state_t |
Functions | |
void | v17_tx_power (v17_tx_state_t *s, float power) |
Adjust a V.17 modem transmit context's output power. | |
v17_tx_state_t * | v17_tx_init (v17_tx_state_t *s, int bit_rate, bool tep, span_get_bit_func_t get_bit, void *user_data) |
Initialise a V.17 modem transmit context. | |
int | v17_tx_restart (v17_tx_state_t *s, int bit_rate, bool tep, bool short_train) |
Reinitialise an existing V.17 modem transmit context. | |
int | v17_tx_release (v17_tx_state_t *s) |
Release a V.17 modem transmit context. | |
int | v17_tx_free (v17_tx_state_t *s) |
Free a V.17 modem transmit context. | |
logging_state_t * | v17_tx_get_logging_state (v17_tx_state_t *s) |
Get the logging context associated with a V.17 modem transmit context. | |
void | v17_tx_set_get_bit (v17_tx_state_t *s, span_get_bit_func_t get_bit, void *user_data) |
Change the get_bit function associated with a V.17 modem transmit context. | |
void | v17_tx_set_modem_status_handler (v17_tx_state_t *s, span_modem_status_func_t handler, void *user_data) |
Change the modem status report function associated with a V.17 modem transmit context. | |
int | v17_tx (v17_tx_state_t *s, int16_t amp[], int len) |
Generate a block of V.17 modem audio samples. |
typedef struct v17_tx_state_s v17_tx_state_t |
V.17 modem transmit side descriptor. This defines the working state for a single instance of a V.17 modem transmitter.
int v17_tx | ( | v17_tx_state_t * | s, |
int16_t | amp[], | ||
int | len ) |
Generate a block of V.17 modem audio samples.
Generate a block of V.17 modem audio samples.
s | The modem context. |
amp | The audio sample buffer. |
len | The number of samples to be generated. |
References v17_tx_state_s::baud_phase, v17_tx_state_s::carrier_phase, v17_tx_state_s::carrier_phase_rate, dds_complexf(), dds_complexi32(), v17_tx_state_s::gain, complexi16_t::im, complexi32_t::im, complexi16_t::re, complexi32_t::re, v17_tx_state_s::rrc_filter_re, v17_tx_state_s::rrc_filter_step, v17_tx_state_s::training_step, V17_TRAINING_SHUTDOWN_END, and V17_TX_FILTER_STEPS.
Referenced by v32bis_tx().
int v17_tx_free | ( | v17_tx_state_t * | s | ) |
Free a V.17 modem transmit context.
Free a V.17 modem transmit context.
s | The modem context. |
logging_state_t * v17_tx_get_logging_state | ( | v17_tx_state_t * | s | ) |
Get the logging context associated with a V.17 modem transmit context.
Get the logging context associated with a V.17 modem transmit context.
s | The modem context. |
References v17_tx_state_s::logging.
v17_tx_state_t * v17_tx_init | ( | v17_tx_state_t * | s, |
int | bit_rate, | ||
bool | tep, | ||
span_get_bit_func_t | get_bit, | ||
void * | user_data ) |
Initialise a V.17 modem transmit context.
Initialise a V.17 modem transmit 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 7200, 9600, 12000 and 14400. |
tep | True is the optional TEP tone is to be transmitted. |
get_bit | The callback routine used to get the data to be transmitted. |
user_data | An opaque pointer. |
References CARRIER_NOMINAL_FREQ, v17_tx_state_s::carrier_phase_rate, dds_phase_ratef(), v17_tx_state_s::get_bit, v17_tx_state_s::get_bit_user_data, v17_tx_state_s::logging, v17_tx_state_s::scrambler_tap, v17_tx_power(), and v17_tx_restart().
Referenced by v32bis_init().
void v17_tx_power | ( | v17_tx_state_t * | s, |
float | power ) |
Adjust a V.17 modem transmit context's output power.
Adjust a V.17 modem transmit context's power output.
s | The modem context. |
power | The power level, in dBm0 |
References v17_tx_state_s::gain.
Referenced by v17_tx_init(), and v32bis_tx_power().
int v17_tx_release | ( | v17_tx_state_t * | s | ) |
Release a V.17 modem transmit context.
Release a V.17 modem transmit context.
s | The modem context. |
int v17_tx_restart | ( | v17_tx_state_t * | s, |
int | bit_rate, | ||
bool | tep, | ||
bool | short_train ) |
Reinitialise an existing V.17 modem transmit context.
Reinitialise an existing V.17 modem transmit context, so it may be reused.
s | The modem context. |
bit_rate | The bit rate of the modem. Valid values are 7200, 9600, 12000 and 14400. |
tep | True is the optional TEP tone is to be transmitted. |
short_train | True if the short training sequence should be used. |
References v17_tx_state_s::baud_phase, v17_tx_state_s::bit_rate, v17_tx_state_s::bits_per_symbol, v17_tx_state_s::carrier_phase, v17_tx_state_s::constellation, v17_tx_state_s::constellation_state, v17_tx_state_s::convolution, v17_tx_state_s::current_get_bit, v17_tx_state_s::diff, v17_tx_state_s::in_training, v17_tx_state_s::rrc_filter_re, v17_tx_state_s::rrc_filter_step, v17_tx_state_s::scramble_reg, v17_tx_state_s::short_train, v17_tx_state_s::training_step, V17_TRAINING_SEG_1, and V17_TRAINING_SEG_TEP_A.
Referenced by v17_tx_init(), and v32bis_restart().
void v17_tx_set_get_bit | ( | v17_tx_state_t * | s, |
span_get_bit_func_t | get_bit, | ||
void * | user_data ) |
Change the get_bit function associated with a V.17 modem transmit context.
Change the get_bit function associated with a V.17 modem transmit context.
s | The modem context. |
get_bit | The callback routine used to get the data to be transmitted. |
user_data | An opaque pointer. |
References v17_tx_state_s::current_get_bit, v17_tx_state_s::get_bit, and v17_tx_state_s::get_bit_user_data.
Referenced by v32bis_set_get_bit().
void v17_tx_set_modem_status_handler | ( | v17_tx_state_t * | s, |
span_modem_status_func_t | handler, | ||
void * | user_data ) |
Change the modem status report function associated with a V.17 modem transmit context.
Change the modem status report function associated with a V.17 modem transmit context.
s | The modem context. |
handler | The callback routine used to report modem status changes. |
user_data | An opaque pointer. |
References v17_tx_state_s::status_handler, and v17_tx_state_s::status_user_data.