| spandsp 0.0.6
    | 
#include <inttypes.h>#include <stdlib.h>#include "floating_fudge.h"#include <string.h>#include <stdio.h>#include "spandsp/telephony.h"#include "spandsp/fast_convert.h"#include "spandsp/logging.h"#include "spandsp/saturated.h"#include "spandsp/dc_restore.h"#include "spandsp/bit_operations.h"#include "spandsp/echo.h"#include "spandsp/private/echo.h"| Macros | |
| #define | NULL (void *) 0 | 
| #define | NONUPDATE_DWELL_TIME 600 /* 600 samples, or 75ms */ | 
| #define | MIN_TX_POWER_FOR_ADAPTION 64*64 | 
| #define | MIN_RX_POWER_FOR_ADAPTION 64*64 | 
| Functions | |
| echo_can_state_t * | echo_can_init (int len, int adaption_mode) | 
| int | echo_can_release (echo_can_state_t *ec) | 
| int | echo_can_free (echo_can_state_t *ec) | 
| void | echo_can_adaption_mode (echo_can_state_t *ec, int adaption_mode) | 
| void | echo_can_flush (echo_can_state_t *ec) | 
| void | echo_can_snapshot (echo_can_state_t *ec) | 
| int16_t | echo_can_update (echo_can_state_t *ec, int16_t tx, int16_t rx) | 
| int16_t | echo_can_hpf_tx (echo_can_state_t *ec, int16_t tx) | 
| Variables | |
| int | sample_no = 0 | 
| void echo_can_adaption_mode | ( | echo_can_state_t * | ec, | 
| int | adaption_mode | ||
| ) | 
Set the adaption mode of a voice echo canceller context.
| ec | The echo canceller context. | 
| adaption_mode | The mode. | 
Referenced by echo_can_init().
| void echo_can_flush | ( | echo_can_state_t * | ec | ) | 
Flush (reinitialise) a voice echo canceller context.
| ec | The echo canceller context. | 
References echo_can_state_s::fir_taps16, and echo_can_state_s::fir_taps32.
| int echo_can_free | ( | echo_can_state_t * | ec | ) | 
Free a voice echo canceller context.
| ec | The echo canceller context. | 
References echo_can_state_s::fir_taps16, and echo_can_state_s::fir_taps32.
| int16_t echo_can_hpf_tx | ( | echo_can_state_t * | ec, | 
| int16_t | tx | ||
| ) | 
Process to high pass filter the tx signal.
| ec | The echo canceller context. | 
| tx | The transmitted auio sample. | 
| echo_can_state_t * echo_can_init | ( | int | len, | 
| int | adaption_mode | ||
| ) | 
Create a voice echo canceller context.
| len | The length of the canceller, in samples. | 
References echo_can_adaption_mode(), echo_can_state_s::fir_taps16, and echo_can_state_s::fir_taps32.
| int echo_can_release | ( | echo_can_state_t * | ec | ) | 
Release a voice echo canceller context.
| ec | The echo canceller context. | 
| int16_t echo_can_update | ( | echo_can_state_t * | ec, | 
| int16_t | tx, | ||
| int16_t | rx | ||
| ) | 
Process a sample through a voice echo canceller.
| ec | The echo canceller context. | 
| tx | The transmitted audio sample. | 
| rx | The received audio sample. | 
References echo_can_state_s::fir_taps16, and echo_can_state_s::fir_taps32.