67 lines
2.9 KiB
C
67 lines
2.9 KiB
C
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#include "../common/dsp.h"
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enum ss5_state {
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SS5_STATE_NULL = 0,
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/* idle line */
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SS5_STATE_IDLE,
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/* outgoing call */
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SS5_STATE_SEND_SEIZE, /* sending seize, waiting for proceed-to-send */
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SS5_STATE_RECV_PROCEED, /* detected proceed-to-send, waiting to cease */
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SS5_STATE_SEND_DIGITS, /* proceed-to-send is ceased, sending digits */
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SS5_STATE_OUT_INACTIVE, /* waiting for called party to answer or being busy */
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SS5_STATE_SEND_ACK_ANS, /* detected answer, sending acknowledge, waiting to cease */
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SS5_STATE_SEND_ACK_BUS, /* detected busy-flash, sending acknowledge, waiting to cease */
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SS5_STATE_SEND_ACK_CLR, /* detected clear-back, sending acknowledge, waiting to cease */
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SS5_STATE_OUT_ACTIVE, /* detected answer is ceased */
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SS5_STATE_SEND_CLR_FWD, /* sending clear-forward, waiting for release-guard */
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SS5_STATE_RECV_RELEASE, /* receiving release-guard, waiting to cease */
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SS5_STATE_SEND_FORWARD, /* sending forward-transfer for a while */
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/* incoming call */
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SS5_STATE_SEND_PROCEED, /* detected seize, sending procced-to-send, waiting to cease */
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SS5_STATE_RECV_DIGIT, /* seize is ceased, waiting for digits */
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SS5_STATE_RECV_SPACE, /* digit received, waiting to cease */
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SS5_STATE_IN_INACTIVE, /* waiting for called party to answer or disconnect */
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SS5_STATE_SEND_ANSWER, /* sending answer, waiting for for acknowledge */
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SS5_STATE_IN_ACTIVE, /* detected acknowledge of answer */
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SS5_STATE_SEND_BUSY, /* sending busy-flash, waiting for acknowledge */
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SS5_STATE_SEND_CLR_BAK, /* sending clear back (hangup) */
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SS5_STATE_SEND_RELEASE, /* detected clear-forward, sending release-guard, waiting for cease */
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SS5_STATE_SEND_REL_WAIT,/* clear forward ceased, but waiting to prevent blueboxing */
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/* seize collision */
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SS5_STATE_DOUBLE_SEIZE, /* seize is detected, sending for while, waiting for cease */
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};
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extern const char *ss5_state_names[];
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struct ss5_endpoint;
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/* SS5 link definition */
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typedef struct ss5 {
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struct ss5_endpoint *ss5_ep;
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char name[32]; /* name of link for debugging */
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/* call states */
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enum ss5_state state; /* state of link */
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struct timer timer; /* for several timeouts */
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char callerid[65]; /* current caller id (outgoing only) */
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char dialing[33]; /* current dial string (send or receive) */
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/* audio processing */
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dsp_t dsp; /* all dsp processing */
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} ss5_t;
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/* SS5 endpoint definition */
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typedef struct ss5_endpoint {
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osmo_cc_endpoint_t cc_ep;
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dsp_t *dsp_list;
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int suppress_disconnect; /* do not forward disconnect towards CC */
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int prevent_blueboxing; /* extend release-guard, so outgoing exchange releases */
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} ss5_endpoint_t;
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void refresh_status(void);
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ss5_endpoint_t *ss5_ep_create(const char *ep_name, int links, int prevent_blueboxing, int suppress_disconnect, int crosstalk, int comfort_noise, int delay_ms, double sense_db);
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void ss5_ep_destroy(ss5_endpoint_t *ss5_ep);
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void cc_message(osmo_cc_endpoint_t *ep, uint32_t callref, osmo_cc_msg_t *msg);
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