Exemplo n.º 1
0
//-----------------------------------------------------------------------------
// Name: initialize_audio( )
// Desc: set up audio capture and playback and initializes any application data
//-----------------------------------------------------------------------------
bool initialize_audio( )
{
    Stk::setSampleRate( g_srate );

    try
    {
        // open the audio device for capture and playback
        g_audio = new RtAudio();

        RtAudio::StreamParameters inputParameters;
        inputParameters.deviceId = g_audio->getDefaultInputDevice();
        inputParameters.nChannels = g_sndin;

        RtAudio::StreamParameters outputParameters;
        outputParameters.deviceId = g_audio->getDefaultOutputDevice();
        outputParameters.nChannels = g_sndout;

        g_audio->openStream( &outputParameters, &inputParameters,
                             RTAUDIO_FLOAT32, g_srate, &g_buffer_size, cb, NULL);

        // do the pvc
        g_pvc = pv_create( g_window_size, /*1024*/ PVC_BUFFER_SIZE, 2048 );
        pv_set_window( g_pvc, PV_HANNING );

        // start the audio
        g_audio->startStream( );

        // make the window
        hanning( g_window, g_buffer_size );
    }
    catch( RtAudioError & e )
    {
        // exception
        fprintf( stderr, "%s\n", e.getMessage().c_str() );
        fprintf( stderr, "error: cannot open audio device for capture/playback...\n" );
        return false;
    }

    return true;
}
Exemplo n.º 2
0
static int pvcreate_single(struct cmd_context *cmd, const char *pv_name,
			   void *handle)
{
	struct pvcreate_params *pp = (struct pvcreate_params *) handle;
	void *pv;
	void *existing_pv;
	struct id id, *idp = NULL;
	const char *uuid = NULL;
	uint64_t size = 0;
	struct device *dev;
	struct list mdas;
	int pvmetadatacopies;
	uint64_t pvmetadatasize;
	struct volume_group *vg;
	const char *restorefile;
	uint64_t pe_start = 0;
	uint32_t extent_count = 0, extent_size = 0;

	if (arg_count(cmd, uuidstr_ARG)) {
		uuid = arg_str_value(cmd, uuidstr_ARG, "");
		if (!id_read_format(&id, uuid))
			return EINVALID_CMD_LINE;
		if ((dev = device_from_pvid(cmd, &id)) &&
		    (dev != dev_cache_get(pv_name, cmd->filter))) {
			log_error("uuid %s already in use on \"%s\"", uuid,
				  dev_name(dev));
			return ECMD_FAILED;
		}
		idp = &id;
	}

	if (arg_count(cmd, restorefile_ARG)) {
		restorefile = arg_str_value(cmd, restorefile_ARG, "");
		/* The uuid won't already exist */
		init_partial(1);
		if (!(vg = backup_read_vg(cmd, NULL, restorefile))) {
			log_error("Unable to read volume group from %s",
				  restorefile);
			return ECMD_FAILED;
		}
		init_partial(0);
		if (!(existing_pv = find_pv_in_vg_by_uuid(vg, idp))) {
			log_error("Can't find uuid %s in backup file %s",
				  uuid, restorefile);
			return ECMD_FAILED;
		}
		pe_start = pv_pe_start(existing_pv);
		extent_size = pv_pe_size(existing_pv);
		extent_count = pv_pe_count(existing_pv);
	}

	if (!lock_vol(cmd, ORPHAN, LCK_VG_WRITE)) {
		log_error("Can't get lock for orphan PVs");
		return ECMD_FAILED;
	}

	if (!pvcreate_check(cmd, pv_name))
		goto error;

	if (sigint_caught())
		goto error;

	if (arg_sign_value(cmd, physicalvolumesize_ARG, 0) == SIGN_MINUS) {
		log_error("Physical volume size may not be negative");
		goto error;
	}
	size = arg_uint64_value(cmd, physicalvolumesize_ARG, UINT64_C(0)) * 2;

	if (arg_sign_value(cmd, metadatasize_ARG, 0) == SIGN_MINUS) {
		log_error("Metadata size may not be negative");
		goto error;
	}
	pvmetadatasize = arg_uint64_value(cmd, metadatasize_ARG, UINT64_C(0))
	    * 2;
	if (!pvmetadatasize)
		pvmetadatasize = find_config_tree_int(cmd,
						 "metadata/pvmetadatasize",
						 DEFAULT_PVMETADATASIZE);

	pvmetadatacopies = arg_int_value(cmd, metadatacopies_ARG, -1);
	if (pvmetadatacopies < 0)
		pvmetadatacopies = find_config_tree_int(cmd,
						   "metadata/pvmetadatacopies",
						   DEFAULT_PVMETADATACOPIES);

	if (!(dev = dev_cache_get(pv_name, cmd->filter))) {
		log_error("%s: Couldn't find device.  Check your filters?",
			  pv_name);
		goto error;
	}

	list_init(&mdas);
	if (!(pv = pv_create(cmd->fmt, dev, idp, size, pe_start,
			     extent_count, extent_size,
			     pvmetadatacopies, pvmetadatasize, &mdas))) {
		log_error("Failed to setup physical volume \"%s\"", pv_name);
		goto error;
	}

	log_verbose("Set up physical volume for \"%s\" with %" PRIu64
		    " available sectors", pv_name, pv_size(pv));

	/* Wipe existing label first */
	if (!label_remove(pv_dev(pv))) {
		log_error("Failed to wipe existing label on %s", pv_name);
		goto error;
	}

	if (pp->zero) {
		log_verbose("Zeroing start of device %s", pv_name);
		if (!dev_open_quiet(dev)) {
			log_error("%s not opened: device not zeroed", pv_name);
			goto error;
		}

		if (!dev_set(dev, UINT64_C(0), (size_t) 2048, 0)) {
			log_error("%s not wiped: aborting", pv_name);
			dev_close(dev);
			goto error;
		}
		dev_close(dev);
	}

	log_very_verbose("Writing physical volume data to disk \"%s\"",
			 pv_name);
	if (!(pv_write(cmd, (struct physical_volume *)pv, &mdas,
		       arg_int64_value(cmd, labelsector_ARG,
						       DEFAULT_LABELSECTOR)))) {
		log_error("Failed to write physical volume \"%s\"", pv_name);
		goto error;
	}

	log_print("Physical volume \"%s\" successfully created", pv_name);

	unlock_vg(cmd, ORPHAN);
	return ECMD_PROCESSED;

      error:
	unlock_vg(cmd, ORPHAN);
	return ECMD_FAILED;
}