Re: [Libmtp-discuss] struggling with sony nwz-e436f

[Nyall D. <ny...@zo...>]

OK, looking good now. mtp-albums runs through without crashing, and
now correctly gets the number of tracks. And for the first time
without hacky workarounds, banshee can connect to the player :D

Not all good news though, it looks like a bug has sneaked in
somewhere, because I can no longer transfer tracks to the player. Both
Gnomad and mtp-sendtr give the error:
"
Error 2: PTP Layer error 02fe: LIBMTP_Get_Filelisting_With_Callback():
call to ptp_mtp_getobjectpropssupported() failed.
Error 2: (Look this up in ptp.h for an explanation.)
Error 2: PTP Layer error 02fe: LIBMTP_Get_Filelisting_With_Callback():
call to ptp_mtp_getobjectpropssupported() failed.
Error 2: (Look this up in ptp.h for an explanation.)
Error 2: PTP Layer error 02fe: LIBMTP_Get_Filelisting_With_Callback():
call to ptp_mtp_getobjectpropssupported() failed.
Error 2: (Look this up in ptp.h for an explanation.)
Error 2: PTP Layer error 02fe: LIBMTP_Get_Filelisting_With_Callback():
call to ptp_mtp_getobjectpropssupported() failed.
Error 2: (Look this up in ptp.h for an explanation.)
Error 2: PTP Layer error a803: send_file_object_info():Could not send
object property list.
Error 2: (Look this up in ptp.h for an explanation.)
Error 1: LIBMTP_Send_Track_From_File_Descriptor(): subcall to
LIBMTP_Send_File_From_File_Descriptor failed.
"

Similarly, banshee reports:

"
[Warn  21:20:34.634] Caught an exception - PTP Layer error 2002:
add_object_to_cache(): couldn't add object to cache (in `')

(Look this up in ptp.h for an explanation.) (in `')

LIBMTP_Send_File_From_File_Descriptor(): Could not retrieve updated
metadata. (in `')

LIBMTP_Send_Track_From_File_Descriptor(): subcall to
LIBMTP_Send_File_From_File_Descriptor failed. (in `Mtp')
  at Mtp.LibMtpException.CheckErrorStack (Mtp.MtpDeviceHandle handle)
[0x0006f] in /home/nyall/Sources/banshee/src/Libraries/Mtp/Mtp/Error.cs:67
  at Mtp.Track.SendTrack (Mtp.MtpDeviceHandle handle, System.String
path, Mtp.TrackStruct& metadata, Mtp.ProgressFunction callback, IntPtr
data) [0x00022] in
/home/nyall/Sources/banshee/src/Libraries/Mtp/Mtp/Track.cs:228
  at Mtp.MtpDevice.UploadTrack (System.String path, Mtp.Track track,
Mtp.Folder folder, Mtp.ProgressFunction callback) [0x0004e] in
/home/nyall/Sources/banshee/src/Libraries/Mtp/Mtp/MtpDevice.cs:266
  at Banshee.Dap.Mtp.MtpSource.AddTrackToDevice
(Banshee.Collection.Database.DatabaseTrackInfo track,
Banshee.Base.SafeUri fromUri) [0x00030] in
/home/nyall/Sources/banshee/src/Dap/Banshee.Dap.Mtp/Banshee.Dap.Mtp/MtpSource.cs:356
  at Banshee.Dap.DapSource.AttemptToAddTrackToDevice
(Banshee.Collection.Database.DatabaseTrackInfo track,
Banshee.Base.SafeUri fromUri) [0x00051] in
/home/nyall/Sources/banshee/src/Dap/Banshee.Dap/Banshee.Dap/DapSource.cs:324
  at Banshee.Dap.DapSource.AddTrackAndIncrementCount
(Banshee.Collection.Database.DatabaseTrackInfo track) [0x0000c] in
/home/nyall/Sources/banshee/src/Dap/Banshee.Dap/Banshee.Dap/DapSource.cs:367
  at Banshee.Sources.PrimarySource.AddTrackList (System.Object
cached_list) [0x00091] in
/home/nyall/Sources/banshee/src/Core/Banshee.Services/Banshee.Sources/PrimarySource.cs:631
"

But, apart from this, I think we're nearly there. :D
Thanks for all your hard work on this, I think it's time I sent a
donation through...

Regards,
Nyall




On Tue, Sep 8, 2009 at 5:30 PM, Linus Walleij
<lin...@gm...> wrote:
> 2009/9/8 Linus Walleij <lin...@gm...>:
>
>> That is trying to get property 0xdc96 for album 0x00004203. 0xdc96
>> is "composer". So perhaps this buggy read messes up the internal
>> logic of the PTP message parser so that the next read of the references
>> get too long and totallt mess things up.
>>
>> This is not so strange. The mtp-detect log for SONY NWZ-E436F
>> says it does not support composer but libmtp doesn't care
>> about that and try to retrieve it anyway :-P
>>
>> SO I must put in some code to make the LIBMTP_Get_Album()
>> etc not try to read this unless the device supports it.
>> (OK will fix, wait.)
>
> OK I think I've fixed it, can you pull the latest CVS and see if it works?
>
> Linus
>
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