spandsp
0.0.6
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typedef struct modem_connect_tones_rx_state_s modem_connect_tones_rx_state_t |
Modem connect tones receiver descriptor. This defines the state of a single working instance of the tone detector.
typedef struct modem_connect_tones_tx_state_s modem_connect_tones_tx_state_t |
Modem connect tones generator descriptor. This defines the state of a single working instance of the tone generator.
anonymous enum |
Free an instance of the modem connect tones detector.
s | The context. |
Test if a modem_connect tone has been detected.
s | The context. |
References MODEM_CONNECT_TONES_NONE.
modem_connect_tones_rx_state_t* modem_connect_tones_rx_init | ( | modem_connect_tones_rx_state_t * | s, |
int | tone_type, | ||
tone_report_func_t | tone_callback, | ||
void * | user_data | ||
) |
Initialise an instance of the modem connect tones detector.
s | The context. |
tone_type | The type of connect tone being tested for. |
tone_callback | An optional callback routine, used to report tones |
user_data | An opaque pointer passed to the callback routine, |
References fsk_rx_init(), fsk_rx_signal_cutoff(), MODEM_CONNECT_TONES_ANS, MODEM_CONNECT_TONES_ANS_PR, MODEM_CONNECT_TONES_ANSAM, MODEM_CONNECT_TONES_ANSAM_PR, MODEM_CONNECT_TONES_FAX_CED_OR_PREAMBLE, MODEM_CONNECT_TONES_FAX_PREAMBLE, and MODEM_CONNECT_TONES_NONE.
Release an instance of the modem connect tones detector.
s | The context. |
Free an instance of the modem connect tones generator.
s | The context. |
modem_connect_tones_tx_state_t* modem_connect_tones_tx_init | ( | modem_connect_tones_tx_state_t * | s, |
int | tone_type | ||
) |
Initialise an instance of the modem connect tones generator.
s | The context. |
References dds_phase_rate(), dds_scaling_dbm0(), MODEM_CONNECT_TONES_ANS, MODEM_CONNECT_TONES_ANS_PR, MODEM_CONNECT_TONES_ANSAM, MODEM_CONNECT_TONES_ANSAM_PR, and MODEM_CONNECT_TONES_FAX_CNG.
Release an instance of the modem connect tones generator.
s | The context. |
SPAN_DECLARE_NONSTD | ( | int | ) |
Generate a block of modem connect tones 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.
Process a block of samples through an instance of the modem connect tones detector.
s | The context. |
amp | An array of signal samples. |
len | The number of samples to generate. |
s | The context. |
amp | An array of signal samples. |
len | The number of samples in the array. |