| spandsp 0.0.6
    | 
Go to the source code of this file.
| Classes | |
| struct | fsk_spec_t | 
| Macros | |
| #define | FSK_MAX_WINDOW_LEN 128 | 
| Typedefs | |
| typedef struct fsk_tx_state_s | fsk_tx_state_t | 
| typedef struct fsk_rx_state_s | fsk_rx_state_t | 
| Functions | |
| fsk_tx_state_t * | fsk_tx_init (fsk_tx_state_t *s, const fsk_spec_t *spec, get_bit_func_t get_bit, void *user_data) | 
| Initialise an FSK modem transmit context. | |
| int | fsk_tx_restart (fsk_tx_state_t *s, const fsk_spec_t *spec) | 
| int | fsk_tx_release (fsk_tx_state_t *s) | 
| int | fsk_tx_free (fsk_tx_state_t *s) | 
| void | fsk_tx_power (fsk_tx_state_t *s, float power) | 
| Adjust an FSK modem transmit context's power output. | |
| void | fsk_tx_set_get_bit (fsk_tx_state_t *s, get_bit_func_t get_bit, void *user_data) | 
| void | fsk_tx_set_modem_status_handler (fsk_tx_state_t *s, modem_status_func_t handler, void *user_data) | 
| Change the modem status report function associated with an FSK modem transmit context. | |
| SPAN_DECLARE_NONSTD (int) fsk_tx(fsk_tx_state_t *s | |
| Generate a block of FSK modem audio samples. | |
| float | fsk_rx_signal_power (fsk_rx_state_t *s) | 
| void | fsk_rx_signal_cutoff (fsk_rx_state_t *s, float cutoff) | 
| Adjust an FSK modem receive context's carrier detect power threshold. | |
| fsk_rx_state_t * | fsk_rx_init (fsk_rx_state_t *s, const fsk_spec_t *spec, int framing_mode, put_bit_func_t put_bit, void *user_data) | 
| Initialise an FSK modem receive context. | |
| int | fsk_rx_restart (fsk_rx_state_t *s, const fsk_spec_t *spec, int framing_mode) | 
| int | fsk_rx_release (fsk_rx_state_t *s) | 
| int | fsk_rx_free (fsk_rx_state_t *s) | 
| void | fsk_rx_set_put_bit (fsk_rx_state_t *s, put_bit_func_t put_bit, void *user_data) | 
| void | fsk_rx_set_modem_status_handler (fsk_rx_state_t *s, modem_status_func_t handler, void *user_data) | 
| Change the modem status report function associated with an FSK modem receive context. | |
| Variables | |
| SPAN_DECLARE_DATA const fsk_spec_t | preset_fsk_specs [] | 
| int16_t | amp [] | 
| int16_t int | len | 
| typedef struct fsk_rx_state_s fsk_rx_state_t | 
FSK modem receive descriptor. This defines the state of a single working instance of an FSK modem receiver.
| typedef struct fsk_tx_state_s fsk_tx_state_t | 
FSK modem transmit descriptor. This defines the state of a single working instance of an FSK modem transmitter.
| fsk_rx_state_t * fsk_rx_init | ( | fsk_rx_state_t * | s, | 
| const fsk_spec_t * | spec, | ||
| int | framing_mode, | ||
| put_bit_func_t | put_bit, | ||
| void * | user_data | ||
| ) | 
Initialise an FSK modem receive context.
Initialise an FSK modem receive context.
| s | The modem context. | 
| spec | The specification of the modem tones and rate. | 
| framing_mode | 0 for fully asynchronous mode. 1 for synchronous mode. >1 for this many bits per asynchronous character frame. | 
| put_bit | The callback routine used to put the received data. | 
| user_data | An opaque pointer. | 
References fsk_rx_state_s::put_bit, and fsk_rx_state_s::put_bit_user_data.
Referenced by adsi_rx_init(), modem_connect_tones_rx_init(), and v18_init().
| void fsk_rx_set_modem_status_handler | ( | fsk_rx_state_t * | s, | 
| modem_status_func_t | handler, | ||
| void * | user_data | ||
| ) | 
Change the modem status report function associated with an FSK modem receive context.
Change the modem status report function associated with an FSK modem receive context.
| s | The modem context. | 
| handler | The callback routine used to report modem status changes. | 
| user_data | An opaque pointer. | 
References fsk_rx_state_s::status_handler, and fsk_rx_state_s::status_user_data.
| void fsk_rx_signal_cutoff | ( | fsk_rx_state_t * | s, | 
| float | cutoff | ||
| ) | 
Adjust an FSK modem receive context's carrier detect power threshold.
Adjust an FSK modem receive context's carrier detect power threshold.
| s | The modem context. | 
| cutoff | The power level, in dBm0 | 
References power_meter_level_dbm0().
Referenced by modem_connect_tones_rx_init().
| float fsk_rx_signal_power | ( | fsk_rx_state_t * | s | ) | 
Get the current received signal power.
| s | The modem context. | 
References power_meter_current_dbm0().
| fsk_tx_state_t * fsk_tx_init | ( | fsk_tx_state_t * | s, | 
| const fsk_spec_t * | spec, | ||
| get_bit_func_t | get_bit, | ||
| void * | user_data | ||
| ) | 
Initialise an FSK modem transmit context.
Initialise an FSK modem transmit context.
| s | The modem context. | 
| spec | The specification of the modem tones and rate. | 
| get_bit | The callback routine used to get the data to be transmitted. | 
| user_data | An opaque pointer. | 
References fsk_tx_state_s::get_bit, and fsk_tx_state_s::get_bit_user_data.
Referenced by v18_init().
| void fsk_tx_power | ( | fsk_tx_state_t * | s, | 
| float | power | ||
| ) | 
Adjust an FSK modem transmit context's power output.
Adjust an FSK modem transmit context's power output.
| s | The modem context. | 
| power | The power level, in dBm0 | 
References dds_scaling_dbm0().
| void fsk_tx_set_modem_status_handler | ( | fsk_tx_state_t * | s, | 
| modem_status_func_t | handler, | ||
| void * | user_data | ||
| ) | 
Change the modem status report function associated with an FSK modem transmit context.
Change the modem status report function associated with an FSK modem transmit context.
| s | The modem context. | 
| handler | The callback routine used to report modem status changes. | 
| user_data | An opaque pointer. | 
References fsk_tx_state_s::status_handler, and fsk_tx_state_s::status_user_data.
| SPAN_DECLARE_NONSTD | ( | int | ) | 
Generate a block of FSK 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.
Fake processing of a missing block of received FSK modem audio samples.
Process a block of received FSK modem audio samples.
Generate a block of FSK modem audio samples.
| s | The modem context. | 
| amp | The audio sample buffer. | 
| len | The number of samples to be generated. | 
Process a block of received FSK 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 FSK modem audio samples (e.g due to packet loss).
| s | The modem context. | 
| len | The number of samples to fake. |