PJSUA API - High Level Softphone API 日本語訳 ref: http://qiita.com/hiroeorz@github/items/348668b461b661f51acc

file0.c

#include <pjsua-lib/pjsua.h>
#define THIS_FILE __FILE__

static pj_status_t app_init(void)
{
  pjsua_config ua_cfg;
  pjsua_logging_config log_cfg;
  pjsua_media_config media_cfg;
  pj_status_t status;

  // Must create pjsua before anything else!
  status = pjsua_create();

  if (status != PJ_SUCCESS) {
    pjsua_perror(THIS_FILE, "Error initializing pjsua", status);
    return status;
  }

  // Initialize configs with default settings.
  pjsua_config_default(&ua_cfg);
  pjsua_logging_config_default(&log_cfg);
  pjsua_media_config_default(&media_cfg);

  // At the very least, application would want to override
  // the call callbacks in pjsua_config:
  ua_cfg.cb.on_incoming_call = ...
  ua_cfg.cb.on_call_state = ..
    ...
  // Customize other settings (or initialize them from application specific
  // configuration file):
  ...
  // Initialize pjsua
  status = pjsua_init(&ua_cfg, &log_cfg, &media_cfg);

  if (status != PJ_SUCCESS) {
    pjsua_perror(THIS_FILE, "Error initializing pjsua", status);
    return status;
  }
  .
  ...
}

file1.c

static pj_status_t app_run(void)
{
  pj_status_t status;

  // Start pjsua
  status = pjsua_start();

  if (status != PJ_SUCCESS) {
    pjsua_destroy();
    pjsua_perror(THIS_FILE, "Error starting pjsua", status);
    return status;
  }

  // Run application loop
  while (1) {
    char choice[10];
    printf("Select menu: ");
    fgets(choice, sizeof(choice), stdin);
    ...
  }
}