libspandsp 0.0.4
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Go to the source code of this file.
Classes | |
struct | v27ter_tx_state_t |
Defines | |
#define | V27TER_TX_FILTER_STEPS 9 |
Functions | |
void | v27ter_tx_power (v27ter_tx_state_t *s, float power) |
Adjust a V.27ter modem transmit context's output power. | |
v27ter_tx_state_t * | v27ter_tx_init (v27ter_tx_state_t *s, int bit_rate, int tep, get_bit_func_t get_bit, void *user_data) |
Initialise a V.27ter modem transmit context. | |
int | v27ter_tx_restart (v27ter_tx_state_t *s, int bit_rate, int tep) |
Reinitialise an existing V.27ter modem transmit context. | |
int | v27ter_tx_free (v27ter_tx_state_t *s) |
Free a V.27ter modem transmit context. | |
void | v27ter_tx_set_get_bit (v27ter_tx_state_t *s, get_bit_func_t get_bit, void *user_data) |
Change the get_bit function associated with a V.27ter modem transmit context. | |
int | v27ter_tx (v27ter_tx_state_t *s, int16_t amp[], int len) |
Generate a block of V.27ter modem audio samples. |
int v27ter_tx | ( | v27ter_tx_state_t * | s, |
int16_t | amp[], | ||
int | len | ||
) |
Generate a block of V.27ter modem audio samples.
Generate a block of V.27ter modem audio samples.
s | The modem context. |
amp | The audio sample buffer. |
len | The number of samples to be generated. |
References v27ter_tx_state_t::baud_phase, v27ter_tx_state_t::bit_rate, v27ter_tx_state_t::carrier_phase, v27ter_tx_state_t::carrier_phase_rate, dds_complexf(), dds_complexi(), v27ter_tx_state_t::gain_2400, v27ter_tx_state_t::gain_4800, complexf_t::im, complexf_t::re, v27ter_tx_state_t::rrc_filter, v27ter_tx_state_t::rrc_filter_step, and v27ter_tx_state_t::training_step.
int v27ter_tx_free | ( | v27ter_tx_state_t * | s | ) |
Free a V.27ter modem transmit context.
Free a V.27ter modem transmit context.
s | The modem context. |
v27ter_tx_state_t* v27ter_tx_init | ( | v27ter_tx_state_t * | s, |
int | bit_rate, | ||
int | tep, | ||
get_bit_func_t | get_bit, | ||
void * | user_data | ||
) |
Initialise a V.27ter modem transmit context.
Initialise a V.27ter modem transmit context.
s | The modem context. |
bit_rate | The bit rate of the modem. Valid values are 2400 and 4800. |
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 v27ter_tx_state_t::carrier_phase_rate, dds_phase_ratef(), v27ter_tx_state_t::get_bit, v27ter_tx_state_t::logging, v27ter_tx_state_t::user_data, v27ter_tx_power(), and v27ter_tx_restart().
Referenced by fax_init(), t31_init(), and t38_gateway_init().
void v27ter_tx_power | ( | v27ter_tx_state_t * | s, |
float | power | ||
) |
Adjust a V.27ter modem transmit context's output power.
Adjust a V.27ter modem transmit context's power output.
s | The modem context. |
power | The power level, in dBm0 |
References v27ter_tx_state_t::gain_2400, and v27ter_tx_state_t::gain_4800.
Referenced by v27ter_tx_init().
int v27ter_tx_restart | ( | v27ter_tx_state_t * | s, |
int | bit_rate, | ||
int | tep | ||
) |
Reinitialise an existing V.27ter modem transmit context.
Reinitialise an existing V.27ter modem transmit context, so it may be reused.
s | The modem context. |
bit_rate | The bit rate of the modem. Valid values are 2400 and 4800. |
tep | TRUE is the optional TEP tone is to be transmitted. |
References v27ter_tx_state_t::baud_phase, v27ter_tx_state_t::bit_rate, v27ter_tx_state_t::carrier_phase, v27ter_tx_state_t::constellation_state, v27ter_tx_state_t::current_get_bit, v27ter_tx_state_t::in_training, v27ter_tx_state_t::rrc_filter, v27ter_tx_state_t::rrc_filter_step, v27ter_tx_state_t::scramble_reg, v27ter_tx_state_t::scrambler_pattern_count, and v27ter_tx_state_t::training_step.
Referenced by v27ter_tx_init().
void v27ter_tx_set_get_bit | ( | v27ter_tx_state_t * | s, |
get_bit_func_t | get_bit, | ||
void * | user_data | ||
) |
Change the get_bit function associated with a V.27ter modem transmit context.
Change the get_bit function associated with a V.27ter 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 v27ter_tx_state_t::current_get_bit, v27ter_tx_state_t::get_bit, and v27ter_tx_state_t::user_data.