C++ MTP_SOURCE_GET_PRIVATE函数代码示例

static gboolean
request_album_art_idle (RequestAlbumArtData *data)
{
	RBMtpSourcePrivate *priv = MTP_SOURCE_GET_PRIVATE (data->source);
	const char *album;

	/* pretty sure we don't need any extra locking here - we only touch the artwork
	 * request map on the main thread anyway.
	 */

	album = rhythmdb_entry_get_string (data->entry, RHYTHMDB_PROP_ALBUM);
	if (g_hash_table_lookup (priv->artwork_request_map, album) == NULL) {
		GValue *metadata;
		RhythmDB *db = get_db_for_source (data->source);

		rb_debug ("requesting cover art image for album %s", album);
		g_hash_table_insert (priv->artwork_request_map, (gpointer) album, GINT_TO_POINTER (1));
		metadata = rhythmdb_entry_request_extra_metadata (db, data->entry, "rb:coverArt");
		if (metadata) {
			artwork_notify_cb (db, data->entry, "rb:coverArt", metadata, data->source);
			g_value_unset (metadata);
			g_free (metadata);
		}
		g_object_unref (db);
	}

	g_object_unref (data->source);
	rhythmdb_entry_unref (data->entry);
	g_free (data);
	return FALSE;
}

static LIBMTP_filetype_t
mimetype_to_filetype (RBMtpSource *source, const char *mimetype)
{
	RBMtpSourcePrivate *priv = MTP_SOURCE_GET_PRIVATE (source);

	if (!strcmp (mimetype, "audio/mpeg") || !strcmp (mimetype, "application/x-id3")) {
		return LIBMTP_FILETYPE_MP3;
	}  else if (!strcmp (mimetype, "audio/x-wav")) {
		return  LIBMTP_FILETYPE_WAV;
	} else if (!strcmp (mimetype, "application/ogg")) {
		return LIBMTP_FILETYPE_OGG;
	} else if (!strcmp (mimetype, "audio/x-m4a") || !strcmp (mimetype, "video/quicktime")) {
		/* try a few different filetypes that might work */
		if (priv->supported_types[LIBMTP_FILETYPE_M4A])
			return LIBMTP_FILETYPE_M4A;
		else if (!priv->supported_types[LIBMTP_FILETYPE_AAC] && priv->supported_types[LIBMTP_FILETYPE_MP4])
			return LIBMTP_FILETYPE_MP4;
		else
			return LIBMTP_FILETYPE_AAC;

	} else if (!strcmp (mimetype, "audio/x-ms-wma") || !strcmp (mimetype, "audio/x-ms-asf")) {
		return LIBMTP_FILETYPE_WMA;
	} else if (!strcmp (mimetype, "video/x-ms-asf")) {
		return LIBMTP_FILETYPE_ASF;
	} else if (!strcmp (mimetype, "audio/x-flac")) {
		return LIBMTP_FILETYPE_FLAC;
	} else {
		rb_debug ("\"%s\" is not a supported mimetype", mimetype);
		return LIBMTP_FILETYPE_UNKNOWN;
	}
}

static void
queue_free_space_update (RBMtpSource *source)
{
	RBMtpSourcePrivate *priv = MTP_SOURCE_GET_PRIVATE (source);
	rb_mtp_thread_queue_callback (priv->device_thread,
				      (RBMtpThreadCallback) update_free_space_cb, source, NULL);
}

static void
unmount_done_cb (GObject *object, GAsyncResult *result, gpointer psource)
{
	GMount *mount;
	RBMtpSource *source;
	gboolean ok;
	GError *error = NULL;
	RBMtpSourcePrivate *priv;

	mount = G_MOUNT (object);
	source = RB_MTP_SOURCE (psource);
	priv = MTP_SOURCE_GET_PRIVATE (source);

	ok = g_mount_unmount_with_operation_finish (mount, result, &error);
	if (ok) {
		rb_debug ("successfully unmounted mtp device");
		priv->remount_volume = g_mount_get_volume (mount);

		open_device (source);
	} else {
		g_warning ("Unable to unmount MTP device: %s", error->message);
		g_error_free (error);
	}

	g_object_unref (mount);
	g_object_unref (source);
}

static void
prepare_source (RBMtpSource *source, const char *stream_uri, GObject *src)
{
	RBMtpSourcePrivate *priv = MTP_SOURCE_GET_PRIVATE (source);
	RhythmDBEntry *entry;
	RhythmDB *db;

	/* make sure this stream is for a file on our device */
	if (g_str_has_prefix (stream_uri, "xrbmtp://") == FALSE)
		return;

	db = get_db_for_source (source);
	entry = rhythmdb_entry_lookup_by_location (db, stream_uri);
	g_object_unref (db);
	if (entry == NULL)
		return;

	if (_rb_source_check_entry_type (RB_SOURCE (source), entry) == FALSE) {
		rhythmdb_entry_unref (entry);
		return;
	}

	rb_debug ("setting device-thread for stream %s", stream_uri);
	g_object_set (src, "device-thread", priv->device_thread, NULL);
	rhythmdb_entry_unref (entry);
}

static guint64
impl_get_free_space	(RBMediaPlayerSource *source)
{
	RBMtpSourcePrivate *priv = MTP_SOURCE_GET_PRIVATE (source);
	/* probably need a lock for this */
	return priv->free_space;
}

static void
rb_mtp_source_set_property (GObject *object,
			    guint prop_id,
			    const GValue *value,
			    GParamSpec *pspec)
{
	RBMtpSourcePrivate *priv = MTP_SOURCE_GET_PRIVATE (object);
	LIBMTP_raw_device_t *raw_device;

	switch (prop_id) {
	case PROP_RAW_DEVICE:
		raw_device = g_value_get_pointer (value);
		priv->raw_device = *raw_device;
		break;
#if defined(HAVE_GUDEV)
	case PROP_UDEV_DEVICE:
		priv->udev_device = g_value_dup_object (value);
		break;
#else
	case PROP_UDI:
		priv->udi = g_value_dup_string (value);
		break;
#endif
	default:
		G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
		break;
	}
}

static void
artwork_notify_cb (RhythmDB *db,
		   RhythmDBEntry *entry,
		   const char *property_name,
		   const GValue *metadata,
		   RBMtpSource *source)
{
	RBMtpSourcePrivate *priv = MTP_SOURCE_GET_PRIVATE (source);
	GdkPixbuf *pixbuf;
	const char *album_name;

	album_name = rhythmdb_entry_get_string (entry, RHYTHMDB_PROP_ALBUM);

	/* check if we're looking for art for this entry, and if we actually got some */
	if (g_hash_table_remove (priv->artwork_request_map, album_name) == FALSE)
		return;

	if (G_VALUE_HOLDS (metadata, GDK_TYPE_PIXBUF) == FALSE)
		return;

	pixbuf = GDK_PIXBUF (g_value_get_object (metadata));

	rb_mtp_thread_set_album_image (priv->device_thread, album_name, pixbuf);
	queue_free_space_update (source);
}

static gboolean
ensure_loaded (RBMtpSource *source)
{
	RBMtpSourcePrivate *priv = MTP_SOURCE_GET_PRIVATE (source);
#if defined(HAVE_GUDEV)
	GMount *mount;
#endif
	if (priv->tried_open) {
		RBSourceLoadStatus status;
		g_object_get (source, "load-status", &status, NULL);
		return (status == RB_SOURCE_LOAD_STATUS_LOADED);
	}
	priv->tried_open = TRUE;

	/* try to open the device.  if gvfs has mounted it, unmount it first */
#if defined(HAVE_GUDEV)
	mount = find_mount_for_device (priv->udev_device);
	if (mount != NULL) {
		rb_debug ("device is already mounted, waiting until activated");
		g_mount_unmount_with_operation (mount,
						G_MOUNT_UNMOUNT_NONE,
						NULL,
						NULL,
						unmount_done_cb,
						g_object_ref (source));
		/* mount gets unreffed in callback */
	} else {
		rb_debug ("device isn't mounted");
		open_device (source);
	}
#else
	open_device (source);
#endif
	return FALSE;
}

static void
rb_mtp_source_get_property (GObject *object,
			    guint prop_id,
			    GValue *value,
			    GParamSpec *pspec)
{
	RBMtpSourcePrivate *priv = MTP_SOURCE_GET_PRIVATE (object);

	switch (prop_id) {
	case PROP_RAW_DEVICE:
		g_value_set_pointer (value, &priv->raw_device);
		break;
#if defined(HAVE_GUDEV)
	case PROP_UDEV_DEVICE:
		g_value_set_object (value, priv->udev_device);
		break;
#else
	case PROP_UDI:
		g_value_set_string (value, priv->udi);
		break;
#endif
	case PROP_DEVICE_SERIAL:
		g_value_set_string (value, priv->serial);
		break;
	default:
		G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
		break;
	}
}

static char *
rb_mtp_source_get_playback_uri (RhythmDBEntry *entry, gpointer data)
{
	RBMtpSourcePrivate *priv;
	LIBMTP_track_t *track;
	char *path;
	char *uri = NULL;
	GError *error = NULL;

	priv = MTP_SOURCE_GET_PRIVATE (data);

	track = g_hash_table_lookup (priv->entry_map, entry);
	path = g_strdup_printf ("%s/%s-%s",
				g_get_tmp_dir (),
				rhythmdb_entry_dup_string (entry, RHYTHMDB_PROP_ARTIST),
				rhythmdb_entry_dup_string (entry, RHYTHMDB_PROP_TITLE));
	uri = g_filename_to_uri (path, NULL, &error);
	g_free (path);
	if (error != NULL) {
		g_warning ("unable to convert path %s to filename: %s", path, error->message);
		g_error_free (error);
		g_free (path);
		return NULL;
	}

	if (rb_mtp_source_transfer_track_to_disk (priv->device, track, uri) == TRUE) {
		rb_debug ("playback URI for %s: %s",
			  rhythmdb_entry_get_string (entry, RHYTHMDB_PROP_LOCATION),
			  uri);
		return uri;
	} else {
		g_free (uri);
		return NULL;
	}
}

/* this callback runs on the device handling thread, so it can call libmtp directly */
static void
mtp_device_open_cb (LIBMTP_mtpdevice_t *device, RBMtpSource *source)
{
	RBMtpSourcePrivate *priv = MTP_SOURCE_GET_PRIVATE (source);
	DeviceOpenedData *data;

	if (device == NULL) {
		/* can't delete the source on this thread, so move it to the main thread */
		g_idle_add ((GSourceFunc) device_open_failed_idle, g_object_ref (source));
		return;
	}

	/* set the source name to match the device, ignoring some
	 * particular broken device names.
	 */
	data = g_new0 (DeviceOpenedData, 1);
	data->source = g_object_ref (source);
	data->name = LIBMTP_Get_Friendlyname (device);
	if (data->name == NULL || strcmp (data->name, "?????") == 0) {
		g_free (data->name);
		data->name = LIBMTP_Get_Modelname (device);
	}
	if (data->name == NULL) {
		data->name = g_strdup (_("Digital Audio Player"));
	}

	/* get some other device information that doesn't change */
	priv->manufacturer = LIBMTP_Get_Manufacturername (device);
	priv->device_version = LIBMTP_Get_Deviceversion (device);
	priv->model_name = LIBMTP_Get_Modelname (device);
	priv->serial = LIBMTP_Get_Serialnumber (device);

	/* calculate the device capacity */
	priv->capacity = 0;
	if (LIBMTP_Get_Storage (device, LIBMTP_STORAGE_SORTBY_NOTSORTED) == 0) {
		LIBMTP_devicestorage_t *storage;
		for (storage = device->storage;
		     storage != NULL;
		     storage = storage->next) {
			priv->capacity += storage->MaxCapacity;
		}
	}

	update_free_space_cb (device, RB_MTP_SOURCE (source));

	/* figure out the set of formats supported by the device */
	if (LIBMTP_Get_Supported_Filetypes (device, &data->types, &data->num_types) != 0) {
		rb_mtp_thread_report_errors (priv->device_thread, FALSE);
	}

	g_idle_add ((GSourceFunc) device_opened_idle, data);

	/* now get the track list */
	rb_mtp_thread_get_track_list (priv->device_thread, (RBMtpTrackListCallback) mtp_tracklist_cb, g_object_ref (source), g_object_unref);
}

static void
rb_mtp_source_init (RBMtpSource *source)
{
	RBMtpSourcePrivate *priv = MTP_SOURCE_GET_PRIVATE (source);

	priv->entry_map = g_hash_table_new_full (g_direct_hash,
						 g_direct_equal,
						 NULL,
						 (GDestroyNotify) LIBMTP_destroy_track_t);

	priv->track_transfer_map = g_hash_table_new_full (g_str_hash, g_str_equal, g_free, NULL);
}

static void
rb_mtp_source_name_changed_cb (RBMtpSource *source,
			       GParamSpec *spec,
			       gpointer data)
{
	RBMtpSourcePrivate *priv = MTP_SOURCE_GET_PRIVATE (source);
	char *name = NULL;

	g_object_get (source, "name", &name, NULL);
	rb_mtp_thread_set_device_name (priv->device_thread, name);
	g_free (name);
}

static void
open_device (RBMtpSource *source)
{
	RBMtpSourcePrivate *priv = MTP_SOURCE_GET_PRIVATE (source);

	rb_debug ("actually opening device");
	priv->device_thread = rb_mtp_thread_new ();
	rb_mtp_thread_open_device (priv->device_thread,
				   &priv->raw_device,
				   (RBMtpOpenCallback)mtp_device_open_cb,
				   g_object_ref (source),
				   g_object_unref);
}