Linux uses UTF8 but java and MTP both
use UTF16. In a few places, this results
in the top byte of a UTF16 string being
truncated on conversion to UTF8.
Also, the hardcoded UTF to byte serialization
in MtpStringBuffer is incorrect.
Replace it with conversions from std, and
replace usages of MtpString with MtpStringBuffer.
Remove any remaining usages of libutils
and replace them with corresponding std
libraries.
Bug: 70546563
Test: Mtp works, tests pass
Test: file/folder names containing emoji can be transferred to/from
windows
Change-Id: Idbcb73f1beac17ce8a90843fa254e759dd1a6369
When sending a MtpDataPacket to a MTP device, the kernel driver splits
it into multiple URB packets so that the URB packet size does not exceed
the buffer size at the MTP device.
Previously MtpDataPacket sends its header first, then sends the
payload. It means the first URB packet only contains the header of
MtpDataPacket and the URB packet size is smaller than the maximum URB
packet size (short packet). Some MTP devices regard the short packet as
the end of the sequencail URB packets, thus the devices do not accept
the following URB packets that contain the payload.
The MTP spec says if the responder (MTP device) sends the data in a way
where the first pacekt contains only the header, the initiator (MTP
host) must send data in the same way. Otherwise the initiator must not
send a short packet in the sequencial URB packets.
The CL fixes the MTP host implementation so that it remembers how the
MTP device sends data, and uses the same way when sending data
from the host.
Bug: 31165557
Test: Manually invokes MtpDevice#sendObject
Change-Id: Ic76eb4241ed74957414aef2990be08cd77a9f5a9
At this point much of the plumbing is in place, but only a few simple queries
are supported.
This is enough to support a proof of concept sample program that navigates
the file hierarchy of a digital camera connected via USB.
Also removed obsolete ptptest host test program.
Change-Id: I17644344b9f0ce1ecc302bc0478c1f3d44a1647f
Signed-off-by: Mike Lockwood <lockwood@android.com>
Jerry Zhang
Daichi Hirono
Mike Lockwood
Mike Lockwood