+
+ int64_t num_samples;
+ int submitted_transfers;
+ int empty_transfer_count;
+ int num_channels, cur_channel;
+ uint16_t channel_masks[16];
+ uint16_t channel_data[16];
+ uint8_t *convbuffer;
+ size_t convbuffer_size;
+
+ void *cb_data;
+ unsigned int num_transfers;
+ struct libusb_transfer **transfers;
+ int *usbfd;