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spandsp 0.0.6
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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, int tep, 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, int tep, int 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, 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, modem_status_func_t handler, void *user_data) |
| Change the modem status report function associated with a V.17 modem transmit context. | |
| SPAN_DECLARE_NONSTD (int) v17_tx(v17_tx_state_t *s | |
| Generate a block of V.17 modem audio samples. | |
Variables | |
| int16_t | amp [] |
| int16_t int | len |
| 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.
| SPAN_DECLARE_NONSTD | ( | int | ) |
Generate a block of V.17 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.17 modem audio samples.
| s | The modem context. |
| amp | The audio sample buffer. |
| len | The number of samples to be generated. |
| 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, | ||
| int | tep, | ||
| 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_power(), and v17_tx_restart().
| 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().
| 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, | ||
| int | tep, | ||
| int | 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, 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().
| void v17_tx_set_get_bit | ( | v17_tx_state_t * | s, |
| 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.
| void v17_tx_set_modem_status_handler | ( | v17_tx_state_t * | s, |
| 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.