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#ifndef _DTMF_H_
#define _DTMF_H_
#include <inttypes.h>
#include <glib.h>
#include <errno.h>
#include <stdbool.h>
#include "str.h"
#include "socket.h"
struct call_media;
struct call_monologue;
enum dtmf_trigger_type {
DTMF_TRIGGER_BLOCK = 0,
DTMF_TRIGGER_UNBLOCK,
DTMF_TRIGGER_START_REC,
DTMF_TRIGGER_STOP_REC,
DTMF_TRIGGER_START_STOP_REC,
DTMF_TRIGGER_PAUSE_REC,
DTMF_TRIGGER_PAUSE_RESUME_REC,
DTMF_TRIGGER_START_PAUSE_RESUME_REC,
__NUM_DTMF_TRIGGERS,
};
extern const char *dtmf_trigger_types[__NUM_DTMF_TRIGGERS];
struct dtmf_trigger_state {
enum dtmf_trigger_type type; // points to matching action
str trigger; // string to look for
unsigned int matched; // how many digits matched so far
bool inactive; // ignore even if set
};
struct dtmf_trigger_action {
void (*matched)(struct call_media *, struct call_monologue *); // run when the trigger is found
bool repeatable; // reset after a match or not
void (*digit)(struct call_media *, struct call_monologue *); // run when any digit is found
};
#include "call.h"
struct media_packet;
struct call_media;
struct call_monologue;
struct dtmf_event {
int code; // char for start, zero for end
int volume;
uint64_t ts;
int rand_code; // state for random replace mode
unsigned int index; // running counter of events
enum block_dtmf_mode block_dtmf; // block mode at the time of the event
};
bool dtmf_init(void);
int dtmf_event_packet(struct media_packet *, str *, int, uint64_t ts); // 0 = ok, 1 = end event, -1 = error
int dtmf_event_payload(str *, uint64_t *, uint64_t, struct dtmf_event *, dtmf_event_q *);
void dtmf_event_free(struct dtmf_event *);
int dtmf_code_from_char(char);
char dtmf_code_to_char(int code);
const char *dtmf_inject(struct call_media *media, int code, int volume, int duration, int pause,
struct call_media *sink);
bool dtmf_do_logging(const call_t *, bool injected);
void dtmf_dsp_event(const struct dtmf_event *new_event, struct dtmf_event *cur_event,
struct call_media *media, int clockrate, uint64_t ts, bool injected);
enum block_dtmf_mode dtmf_get_block_mode(call_t *call, struct call_monologue *ml);
bool is_pcm_dtmf_block_mode(enum block_dtmf_mode mode);
bool is_dtmf_replace_mode(enum block_dtmf_mode mode);
struct dtmf_event *is_in_dtmf_event(dtmf_event_q *, uint32_t ts, int clockrate, unsigned int head,
unsigned int trail);
void dtmf_trigger_set(struct call_monologue *ml, enum dtmf_trigger_type,
const str *s, bool inactive);
extern struct dtmf_trigger_action dtmf_trigger_actions[__NUM_DTMF_TRIGGERS];
#endif
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