70 lines
2.7 KiB
C
70 lines
2.7 KiB
C
/*****************************************************************************\
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** **
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** Linux Call Router **
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** **
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**---------------------------------------------------------------------------**
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** Copyright: Andreas Eversberg **
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** **
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** mISDN channel handlin for remote application **
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** **
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\*****************************************************************************/
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/* this test produces a test tone to test gaps in audio stream */
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//#define SEAMLESS_TEST
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#define QUEUE_BUFFER_SIZE 8192 /* must be the power of two */
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#define QUEUE_BUFFER_MAX 4096 /* half of size */
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struct bchannel {
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struct bchannel *next;
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struct chan_call *call; /* link to call process */
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unsigned int handle; /* handle for stack id */
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int b_sock; /* socket for b-channel */
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struct lcr_fd lcr_fd; /* socket register */
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int b_mode; /* dsp, raw, dsphdlc */
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int b_state;
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int b_txdata;
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int b_delay;
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int b_tx_dejitter;
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int b_tx_gain, b_rx_gain;
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char b_pipeline[256];
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unsigned int b_conf;
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int b_echo;
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int b_tone;
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int b_rxoff;
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// int b_txmix;
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int b_dtmf;
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int b_bf_len;
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unsigned char b_bf_key[128];
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int nodsp_queue; /* enables nodsp_queue_buffer */
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unsigned char nodsp_queue_buffer[QUEUE_BUFFER_SIZE];
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/* buffer for seamless transmission */
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unsigned int nodsp_queue_in, nodsp_queue_out;
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/* in and out pointers */
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int queue_sent; /* data for mISDN was not confrmed yet */
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#ifdef SEAMLESS_TEST
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int test;
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#endif
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};
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extern struct bchannel *bchannel_first;
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extern pid_t bchannel_pid;
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int bchannel_initialize(void);
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void bchannel_deinitialize(void);
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void bchannel_destroy(struct bchannel *bchannel);
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int bchannel_create(struct bchannel *channel, int mode, int queue);
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void bchannel_activate(struct bchannel *channel, int activate);
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void bchannel_transmit(struct bchannel *channel, unsigned char *data, int len);
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void bchannel_join(struct bchannel *channel, unsigned short id);
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void bchannel_dtmf(struct bchannel *channel, int on);
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void bchannel_blowfish(struct bchannel *bchannel, unsigned char *key, int len);
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void bchannel_pipeline(struct bchannel *bchannel, char *pipeline);
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void bchannel_gain(struct bchannel *bchannel, int gain, int tx);
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struct bchannel *find_bchannel_handle(unsigned int handle);
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//struct bchannel *find_bchannel_ref(unsigned int ref);
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struct bchannel *alloc_bchannel(unsigned int handle);
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void free_bchannel(struct bchannel *channel);
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