struct _am7xxx_device {
libusb_device_handle *usb_device;
uint8_t buffer[AM7XXX_HEADER_WIRE_SIZE];
+ am7xxx_device_info *device_info;
am7xxx_context *ctx;
am7xxx_device *next;
};
unserialize_header(dev->buffer, h);
- debug_dump_header(dev->ctx, h);
-
if (h->direction == AM7XXX_DIRECTION_IN) {
ret = 0;
} else {
error(dev->ctx,
- "Received a packet with direction AM7XXX_DIRECTION_OUT, weird!\n");
+ "Expected an AM7XXX_DIRECTION_IN packet, got one with direction = %d. Weird!\n",
+ h->direction);
ret = -EINVAL;
}
+ debug_dump_header(dev->ctx, h);
+
out:
return ret;
}
debug_dump_header(dev->ctx, h);
+ /* For symmetry with read_header() we should check here for
+ * h->direction == AM7XXX_DIRECTION_OUT but we just ensure that in all
+ * the callers and save some cycles here.
+ */
+
serialize_header(h, dev->buffer);
+
ret = send_data(dev, dev->buffer, AM7XXX_HEADER_WIRE_SIZE);
if (ret < 0)
error(dev->ctx, "failed to send data\n");
while (current) {
am7xxx_device *next = current->next;
am7xxx_close_device(current);
+ free(current->device_info);
free(current);
current = next;
}
},
};
+ if (dev->device_info) {
+ memcpy(device_info, dev->device_info, sizeof(*device_info));
+ return 0;
+ }
+
ret = send_header(dev, &h);
if (ret < 0)
return ret;
if (ret < 0)
return ret;
- device_info->native_width = h.header_data.devinfo.native_width;
- device_info->native_height = h.header_data.devinfo.native_height;
+ if (h.packet_type != AM7XXX_PACKET_TYPE_DEVINFO) {
+ error(dev->ctx, "expected packet type: %d, got %d instead!\n",
+ AM7XXX_PACKET_TYPE_DEVINFO, h.packet_type);
+ errno = ENOTSUP;
+ return -ENOTSUP;
+ }
+
+ dev->device_info = malloc(sizeof(*dev->device_info));
+ if (dev->device_info == NULL) {
+ error(dev->ctx, "cannot allocate a device info (%s)\n",
+ strerror(errno));
+ return -ENOMEM;
+ }
+ memset(dev->device_info, 0, sizeof(*dev->device_info));
+
+ dev->device_info->native_width = h.header_data.devinfo.native_width;
+ dev->device_info->native_height = h.header_data.devinfo.native_height;
#if 0
/* No reason to expose these in the public API until we know what they mean */
- device_info->unknown0 = h.header_data.devinfo.unknown0;
- device_info->unknown1 = h.header_data.devinfo.unknown1;
+ dev->device_info->unknown0 = h.header_data.devinfo.unknown0;
+ dev->device_info->unknown1 = h.header_data.devinfo.unknown1;
#endif
return 0;