C++ (Cpp) JACK_Init Examples

Example #1

File: jack.c Project: nphilipp/audacious-plugins

/* Initialize necessary things */
static bool_t jack_init (void)
{
  aud_config_set_defaults ("jack", jack_defaults);

  jack_cfg.isTraceEnabled = aud_get_bool ("jack", "isTraceEnabled");
  jack_cfg.volume_left = aud_get_int ("jack", "volume_left");
  jack_cfg.volume_right = aud_get_int ("jack", "volume_right");

  TRACE("initializing\n");
  JACK_Init(); /* initialize the driver */

  /* set the bio2jack name so users will see xmms-jack in their */
  /* jack client list */
  JACK_SetClientName("audacious-jack");

  /* set the port connection mode */
  jack_set_port_connection_mode();

  output_opened = FALSE;

  /* Always return OK, as we don't know about physical devices here */
  return TRUE;
}

Example #2

File: audev-jackb.c Project: apertome/boodler

int audev_init_device(char *devname, long ratewanted, int verbose, extraopt_t *extra)
{
  extraopt_t *opt;
  int channels;
  unsigned long rate;
  int fragsize, format;
  long jbufframes, jbufsize;
  int res;

  if (verbose) {
    printf("Boodler: JackBIO sound driver.\n");
  }

  if (deviceid) {
    fprintf(stderr, "Sound device is already open.\n");
    return FALSE;
  }

  if (!ratewanted)
    ratewanted = DEFAULT_SOUNDRATE;
  if (!devname) 
    devname = DEFAULT_CLIENTNAME;

  rate = ratewanted;
  channels = 2;
  fragsize = 32768;
  format = 0; /* default to little-endian */

  for (opt=extra; opt->key; opt++) {
    if (!strcmp(opt->key, "end") && opt->val) {
      if (!strcmp(opt->val, "big"))
        format = 1;
      else if (!strcmp(opt->val, "little"))
        format = 0;
    }
    else if (!strcmp(opt->key, "connect") && opt->val) {
      if (!strcmp(opt->val, "none"))
        connect_mode = CONNECT_NONE;
      else if (!strcmp(opt->val, "output"))
        connect_mode = CONNECT_OUTPUT;
      else if (!strcmp(opt->val, "all"))
        connect_mode = CONNECT_ALL;
      else
        printf("JackB connect parameter must be none, output, or all.\n");
    }
    else if (!strcmp(opt->key, "buffersize") && opt->val) {
      fragsize = atol(opt->val);
    }
    else if (!strcmp(opt->key, "listdevices")) {
      printf("JackB driver is unable to list devices.\n");
    }
  }

  JACK_Init();
  JACK_SetPortConnectionMode(connect_mode);
  JACK_SetClientName(devname);

  res = JACK_Open(&deviceid, 16, &rate, 2);
  if (res) {
    fprintf(stderr, "Unable to open JACK connection: error %d\n", res);
    return FALSE;
  }

  jbufsize = JACK_GetBytesFreeSpace(deviceid);
  jbufframes = jbufsize / JACK_GetBytesPerOutputFrame(deviceid);
  if (jbufframes/2 >= rate) {
    sleeptime.tv_sec = 1;
    sleeptime.tv_usec = 0;
  }
  else {
    sleeptime.tv_sec = 0;
    sleeptime.tv_usec = (jbufframes/2) * 1000000 / rate;
  }

  if (verbose) {
    printf("Jack client name is \"%s_...\"\n", devname);
    printf("Sample format is %s-endian.\n", (format ? "big" : "little"));
    printf("Sample rate is %ld fps.\n", rate);
    printf("Boodler buffer size is %d.\n", fragsize);
    printf("Bio2Jack buffer size is %ld (%ld frames).\n", jbufsize, jbufframes);
    switch (connect_mode) {
    case CONNECT_NONE:
      printf("Bio2Jack connect_mode=CONNECT_NONE.\n");
      break;
    case CONNECT_OUTPUT:
      printf("Bio2Jack connect_mode=CONNECT_OUTPUT.\n");
      break;
    case CONNECT_ALL:
      printf("Bio2Jack connect_mode=CONNECT_ALL.\n");
      break;
    default:
      printf("Bio2Jack connect_mode=???.\n");
      break;
    }
  }

  sound_rate = rate;
  sound_channels = channels;
  sound_format = format;
  sound_buffersize = fragsize;

  samplesperbuf = sound_buffersize / 2;
  framesperbuf = sound_buffersize / (2 * sound_channels);

  valbuffer = (long *)malloc(sizeof(long) * samplesperbuf);
  if (!valbuffer) {
    fprintf(stderr, "Unable to allocate sound buffer.\n");
    JACK_Close(deviceid);
    deviceid = 0;
    return FALSE;     
  }
  rawbuffer = (char *)malloc(sound_buffersize);
  if (!rawbuffer) {
    fprintf(stderr, "Unable to allocate sound buffer.\n");
    free(valbuffer);
    JACK_Close(deviceid);
    deviceid = 0;
    return FALSE;    
  }

  return TRUE;
}