filter_audio.h

#ifndef FILTER_AUDIO
#define FILTER_AUDIO

#include <stdint.h>

#ifndef _FILTER_AUDIO
typedef struct Filter_Audio Filter_Audio;
#endif


Filter_Audio *new_filter_audio(uint32_t fs);

void kill_filter_audio(Filter_Audio *f_a);

/* Enable/disable filters. 1 to enable, 0 to disable. */
int enable_disable_filters(Filter_Audio *f_a, int echo, int noise, int gain, int vad);

/* Return -1 on failure.
   Return 0 if audio was processed correctly but it didn't contain any voice. (if VAD is enabled.)
   Return 1 if audio was processed correctly. */
int filter_audio(Filter_Audio *f_a, int16_t *data, unsigned int samples);

/* Give the audio output from your software to this function so it knows what echo to cancel from the frame */
int pass_audio_output(Filter_Audio *f_a, const int16_t *data, unsigned int samples);

/* Tell the echo canceller how much time in ms it takes for audio to be played and recorded back after. */
int set_echo_delay_ms(Filter_Audio *f_a, int16_t msInSndCardBuf);
#endif