bchannel.h

   1 /*****************************************************************************\
   2 **                                                                           **
   3 ** Linux Call Router                                                         **
   4 **                                                                           **
   5 **---------------------------------------------------------------------------**
   6 ** Copyright: Andreas Eversberg                                              **
   7 **                                                                           **
   8 ** mISDN channel handlin for remote application                              **
   9 **                                                                           **
  10 \*****************************************************************************/
  11
  12 /* this test produces a test tone to test gaps in audio stream */
  13 //#define SEAMLESS_TEST
  14
  15 #define QUEUE_BUFFER_SIZE               8192 /* must be the power of two */
  16 #define QUEUE_BUFFER_MAX                4096 /* half of size */
  17
  18 struct bchannel {
  19         struct bchannel *next;
  20         struct chan_call *call;         /* link to call process */
  21         unsigned int handle;            /* handle for stack id */
  22         int b_sock;                     /* socket for b-channel */
  23         struct lcr_fd lcr_fd;           /* socket register */
  24         int b_mode;                     /* dsp, raw, dsphdlc */
  25         int b_state;
  26         int b_txdata;
  27         int b_delay;
  28         int b_tx_dejitter;
  29         int b_tx_gain, b_rx_gain;
  30         char b_pipeline[256];
  31         unsigned int b_conf;
  32         int b_echo;
  33         int b_tone;
  34         int b_rxoff;
  35         // int b_txmix;
  36         int b_dtmf;
  37         int b_bf_len;
  38         unsigned char b_bf_key[128];
  39         int nodsp_queue;                /* enables nodsp_queue_buffer */
  40         unsigned char nodsp_queue_buffer[QUEUE_BUFFER_SIZE];
  41                                         /* buffer for seamless transmission */
  42         unsigned int nodsp_queue_in, nodsp_queue_out;
  43                                         /* in and out pointers */
  44         int queue_sent;                 /* data for mISDN was not confrmed yet */
  45 #ifdef SEAMLESS_TEST
  46         int test;
  47 #endif
  48 };
  49
  50
  51 extern struct bchannel *bchannel_first;
  52 extern pid_t bchannel_pid;
  53
  54 int bchannel_initialize(void);
  55 void bchannel_deinitialize(void);
  56 void bchannel_destroy(struct bchannel *bchannel);
  57 int bchannel_create(struct bchannel *channel, int mode, int queue);
  58 void bchannel_activate(struct bchannel *channel, int activate);
  59 void bchannel_transmit(struct bchannel *channel, unsigned char *data, int len);
  60 void bchannel_join(struct bchannel *channel, unsigned short id);
  61 void bchannel_dtmf(struct bchannel *channel, int on);
  62 void bchannel_blowfish(struct bchannel *bchannel, unsigned char *key, int len);
  63 void bchannel_pipeline(struct bchannel *bchannel, char *pipeline);
  64 void bchannel_gain(struct bchannel *bchannel, int gain, int tx);
  65 struct bchannel *find_bchannel_handle(unsigned int handle);
  66 //struct bchannel *find_bchannel_ref(unsigned int ref);
  67 struct bchannel *alloc_bchannel(unsigned int handle);
  68 void free_bchannel(struct bchannel *channel);
  69