Provided by: libmtp-doc_1.1.13-1_all 
NAME
libmtp -
SYNOPSIS
Macros
#define DEVICE_FLAG_NONE 0x00000000
#define DEVICE_FLAG_BROKEN_MTPGETOBJPROPLIST_ALL 0x00000001
#define DEVICE_FLAG_UNLOAD_DRIVER 0x00000002
#define DEVICE_FLAG_BROKEN_MTPGETOBJPROPLIST 0x00000004
#define DEVICE_FLAG_NO_ZERO_READS 0x00000008
#define DEVICE_FLAG_IRIVER_OGG_ALZHEIMER 0x00000010
#define DEVICE_FLAG_ONLY_7BIT_FILENAMES 0x00000020
#define DEVICE_FLAG_NO_RELEASE_INTERFACE 0x00000040
#define DEVICE_FLAG_IGNORE_HEADER_ERRORS 0x00000080
#define DEVICE_FLAG_BROKEN_SET_OBJECT_PROPLIST 0x00000100
#define DEVICE_FLAG_OGG_IS_UNKNOWN 0x00000200
#define DEVICE_FLAG_BROKEN_SET_SAMPLE_DIMENSIONS 0x00000400
#define DEVICE_FLAG_ALWAYS_PROBE_DESCRIPTOR 0x00000800
#define DEVICE_FLAG_PLAYLIST_SPL_V1 0x00001000
#define DEVICE_FLAG_PLAYLIST_SPL_V2 0x00002000
#define DEVICE_FLAG_CANNOT_HANDLE_DATEMODIFIED 0x00004000
#define DEVICE_FLAG_BROKEN_SEND_OBJECT_PROPLIST 0x00008000
#define DEVICE_FLAG_BROKEN_BATTERY_LEVEL 0x00010000
#define DEVICE_FLAG_DELETE_SENDS_EVENT 0x00020000
#define DEVICE_FLAG_CAPTURE 0x00040000
#define DEVICE_FLAG_CAPTURE_PREVIEW 0x00080000
#define DEVICE_FLAG_NIKON_BROKEN_CAPTURE 0x00100000
#define DEVICE_FLAG_NO_CAPTURE_COMPLETE 0x00400000
#define DEVICE_FLAG_OLYMPUS_XML_WRAPPED 0x00800000
#define DEVICE_FLAG_FLAC_IS_UNKNOWN 0x01000000
#define DEVICE_FLAG_UNIQUE_FILENAMES 0x02000000
#define DEVICE_FLAG_SWITCH_MODE_BLACKBERRY 0x04000000
#define DEVICE_FLAG_LONG_TIMEOUT 0x08000000
#define DEVICE_FLAG_FORCE_RESET_ON_CLOSE 0x10000000
#define DEVICE_FLAG_BROKEN_GET_OBJECT_PROPVAL 0x20000000
#define DEVICE_FLAG_PROPLIST_OVERRIDES_OI 0x40000000
#define DEVICE_FLAGS_SONY_NWZ_BUGS
#define DEVICE_FLAGS_ANDROID_BUGS
#define DEVICE_FLAGS_ARICENT_BUGS
Detailed Description
Special device flags to deal with bugs in specific devices.
Copyright (C) 2005-2007 Richard A. Low richard@wentnet.com Copyright (C) 2005-2012 Linus
Walleij triad@df.lth.se Copyright (C) 2006-2007 Marcus Meissner Copyright (C) 2007 Ted
Bullock
This library is free software; you can redistribute it and/or modify it under the terms of
the GNU Lesser General Public License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
See the GNU Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License along with this
library; if not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA.
This file is supposed to be included by both libmtp and libgphoto2.
Macro Definition Documentation
#define DEVICE_FLAG_ALWAYS_PROBE_DESCRIPTOR 0x00000800
Some devices, particularly SanDisk Sansas, need to always have their 'OS Descriptor'
probed in order to work correctly. This flag provides that extra massage.
#define DEVICE_FLAG_BROKEN_BATTERY_LEVEL 0x00010000
Devices that cannot support reading out battery level.
#define DEVICE_FLAG_BROKEN_GET_OBJECT_PROPVAL 0x20000000
Early Creative Zen (etc) models actually only support command 9805 (Get object property
list) and will hang if you try to get individual properties of an object. Or so it seemed.
Later bug fixes to the library has made this work flawlessly so the bug flag is moot. NOT
USED ANYMORE, THIS FLAG MAY BE RECYCLED.
#define DEVICE_FLAG_BROKEN_MTPGETOBJPROPLIST 0x00000004
This means that the PTP_OC_MTP_GetObjPropList (9805) is broken in some way, either it
doesn't work at all (as for Android devices) or it won't properly return all object
properties if parameter 3 is set to 0xFFFFFFFFU.
#define DEVICE_FLAG_BROKEN_MTPGETOBJPROPLIST_ALL 0x00000001
This means that the PTP_OC_MTP_GetObjPropList is broken in the sense that it won't return
properly formatted metadata for ALL files on the device when you request an object
property list for object 0xFFFFFFFF with parameter 3 likewise set to 0xFFFFFFFF. Compare
to DEVICE_FLAG_BROKEN_MTPGETOBJECTPROPLIST which only signify that it's broken when
getting metadata for a SINGLE object. A typical way the implementation may be broken is
that it may not return a proper count of the objects, and sometimes (like on the ZENs)
objects are simply missing from the list if you use this. Sometimes it has been used
incorrectly to mask bugs in the code (like handling transactions of data with size given
to -1 (0xFFFFFFFFU), in that case please help us remove it now the code is fixed.
Sometimes this is used because getting all the objects is just too slow and the USB
transaction will time out if you use this command.
#define DEVICE_FLAG_BROKEN_SEND_OBJECT_PROPLIST 0x00008000
This avoids use of the send object proplist which is used when creating new objects (not
just updating) The DEVICE_FLAG_BROKEN_SET_OBJECT_PROPLIST is related but only concerns the
case where the object proplist is sent in to update an existing object. The Toshiba
Gigabeat MEU202 for example has this problem.
#define DEVICE_FLAG_BROKEN_SET_OBJECT_PROPLIST 0x00000100
The Motorola RAZR2 V8 (others?) has broken set object proplist causing the metadata
setting to fail. (The set object prop to set individual properties work on this device,
but the metadata is plain ignored on tracks, though e.g. playlist names can be set.)
#define DEVICE_FLAG_BROKEN_SET_SAMPLE_DIMENSIONS 0x00000400
The Creative Zen is quite unstable in libmtp but seems to be better with later firmware
versions. However, it still frequently crashes when setting album art dimensions. This
flag disables setting the dimensions (which seems to make no difference to how the graphic
is displayed).
#define DEVICE_FLAG_CANNOT_HANDLE_DATEMODIFIED 0x00004000
The Sansa E250 is know to have this problem which is actually that the device claims that
property PTP_OPC_DateModified is read/write but will still fail to update it. It can only
be set properly the first time a file is sent.
#define DEVICE_FLAG_CAPTURE 0x00040000
Cameras that can capture images. (libgphoto2)
#define DEVICE_FLAG_CAPTURE_PREVIEW 0x00080000
Cameras that can capture images. (libgphoto2)
#define DEVICE_FLAG_DELETE_SENDS_EVENT 0x00020000
Devices that send 'ObjectDeleted' events after deletion of images. (libgphoto2)
#define DEVICE_FLAG_FLAC_IS_UNKNOWN 0x01000000
This flag is like DEVICE_FLAG_OGG_IS_UNKNOWN but for FLAC files instead. Using the unknown
filetype for FLAC files.
#define DEVICE_FLAG_FORCE_RESET_ON_CLOSE 0x10000000
This flag indicates that the device need an explicit USB reset after each connection. Some
devices don't like this, so it's not done by default.
#define DEVICE_FLAG_IGNORE_HEADER_ERRORS 0x00000080
This flag was introduced with the advent of Creative ZEN 8GB. The device sometimes return
a broken PTP header like this: < 1502 0000 0200 01d1 02d1 01d2 > the latter 6 bytes
(representing 'code' and 'transaction ID') contain junk. This is breaking the PTP/MTP spec
but works on Windows anyway, probably because the Windows implementation does not check
that these bytes are valid. To interoperate with devices like this, we need this flag to
emulate the Windows bug. Broken headers has also been found in the Aricent MTP stack.
#define DEVICE_FLAG_IRIVER_OGG_ALZHEIMER 0x00000010
This flag means that the device is prone to forgetting the OGG container file type, so
that libmtp must look at the filename extensions in order to determine that a file is
actually OGG. This is a clear and present firmware bug, and while firmware bugs should be
fixed in firmware, we like OGG so much that we back it by introducing this flag. The error
has only been seen on iriver devices. Turning this flag on won't hurt anything, just that
the check against filename extension will be done for files of 'unknown' type. If the
player does not even know (reports) that it supports ogg even though it does, please use
the stronger OGG_IS_UNKNOWN flag, which will forcedly support ogg on anything with the
.ogg filename extension.
#define DEVICE_FLAG_LONG_TIMEOUT 0x08000000
This flag indicates that the device need an extra long timeout on some operations.
#define DEVICE_FLAG_NIKON_BROKEN_CAPTURE 0x00100000
Nikon broken capture support without proper ObjectAdded events. (libgphoto2)
#define DEVICE_FLAG_NO_CAPTURE_COMPLETE 0x00400000
Broken capture support where cameras do not send CaptureComplete events. (libgphoto2)
#define DEVICE_FLAG_NO_RELEASE_INTERFACE 0x00000040
This flag indicates that the device will lock up if you try to get status of endpoints
and/or release the interface when closing the device. This fixes problems with SanDisk
Sansa devices especially. It may be a side-effect of a Windows behaviour of never
releasing interfaces.
#define DEVICE_FLAG_NO_ZERO_READS 0x00000008
This means the device doesn't send zero packets to indicate end of transfer when the
transfer boundary occurs at a multiple of 64 bytes (the USB 1.1 endpoint size). Instead,
exactly one extra byte is sent at the end of the transfer if the size is an integer
multiple of USB 1.1 endpoint size (64 bytes).
This behaviour is most probably a workaround due to the fact that the hardware USB slave
controller in the device cannot handle zero writes at all, and the usage of the USB 1.1
endpoint size is due to the fact that the device will 'gear down' on a USB 1.1 hub, and
since 64 bytes is a multiple of 512 bytes, it will work with USB 1.1 and USB 2.0 alike.
#define DEVICE_FLAG_NONE 0x00000000
These flags are used to indicate if some or other device need special treatment. These
should be possible to concatenate using logical OR so please use one bit per feature and
lets pray we don't need more than 32 bits...
#define DEVICE_FLAG_OGG_IS_UNKNOWN 0x00000200
The Samsung YP-T10 think Ogg files shall be sent with the 'unknown' (PTP_OFC_Undefined)
file type, this gives a side effect that is a combination of the iRiver Ogg Alzheimer
problem (have to recognized Ogg files on file extension) and a need to report the Ogg
support (the device itself does not properly claim to support it) and need to set filetype
to unknown when storing Ogg files, even though they're not actually unknown. Later iRivers
seem to need this flag since they do not report to support OGG even though they actually
do. Often the device supports OGG in USB mass storage mode, then the firmware simply miss
to declare metadata support for OGG properly.
#define DEVICE_FLAG_OLYMPUS_XML_WRAPPED 0x00800000
Direct PTP match required. (libgphoto2)
#define DEVICE_FLAG_ONLY_7BIT_FILENAMES 0x00000020
This flag indicates a limitation in the filenames a device can accept - they must be 7 bit
(all chars <= 127/0x7F). It was found first on the Philips Shoqbox, and is a deviation
from the PTP standard which mandates that any unicode chars may be used for filenames. I
guess this is caused by a 7bit-only filesystem being used intrinsically on the device.
#define DEVICE_FLAG_PLAYLIST_SPL_V1 0x00001000
Samsung has implimented its own playlist format as a .spl file stored in the normal file
system, rather than a proper mtp playlist. There are multiple versions of the .spl format
identified by a line in the file: VERSION X.XX Version 1.00 is just a simple playlist.
#define DEVICE_FLAG_PLAYLIST_SPL_V2 0x00002000
Samsung has implimented its own playlist format as a .spl file stored in the normal file
system, rather than a proper mtp playlist. There are multiple versions of the .spl format
identified by a line in the file: VERSION X.XX Version 2.00 is playlist but allows DNSe
sound settings to be stored, per playlist.
#define DEVICE_FLAG_PROPLIST_OVERRIDES_OI 0x40000000
It seems that some devices return an bad data when using the GetObjectInfo operation. So
in these cases we prefer to override the PTP-compatible object infos with the MTP property
list.
For example Some Samsung Galaxy S devices contain an MTP stack that present the ObjectInfo
in 64 bit instead of 32 bit.
#define DEVICE_FLAG_SWITCH_MODE_BLACKBERRY 0x04000000
This flag performs some random magic on the BlackBerry device to switch from USB mass
storage to MTP mode we think.
#define DEVICE_FLAG_UNIQUE_FILENAMES 0x02000000
Device needs unique filenames, no two files can be named the same string.
#define DEVICE_FLAG_UNLOAD_DRIVER 0x00000002
This means that under Linux, another kernel module may be using this device's USB
interface, so we need to detach it if it is. Typically this is on dual-mode devices that
will present both an MTP compliant interface and device descriptor and a USB mass storage
interface. If the USB mass storage interface is in use, other apps (like our userspace
libmtp through libusb access path) cannot get in and get cosy with it. So we can remove
the offending application. Typically this means you have to run the program as root as
well.
#define DEVICE_FLAGS_ANDROID_BUGS
Value:
(DEVICE_FLAG_BROKEN_MTPGETOBJPROPLIST | DEVICE_FLAG_BROKEN_SET_OBJECT_PROPLIST | DEVICE_FLAG_BROKEN_SEND_OBJECT_PROPLIST | DEVICE_FLAG_UNLOAD_DRIVER | DEVICE_FLAG_LONG_TIMEOUT | DEVICE_FLAG_FORCE_RESET_ON_CLOSE)
All these bug flags need to be set on Android devices, they claim to support MTP
operations they actually cannot handle, especially 9805 (Get object property list). These
are auto-assigned to devices reporting 'android.com' in their device extension descriptor.
#define DEVICE_FLAGS_ARICENT_BUGS
Value:
(DEVICE_FLAG_IGNORE_HEADER_ERRORS | DEVICE_FLAG_BROKEN_SEND_OBJECT_PROPLIST | DEVICE_FLAG_BROKEN_MTPGETOBJPROPLIST)
All these bug flags appear on a number of SonyEricsson devices including Android devices
not using the stock Android 4.0+ (Ice Cream Sandwich) MTP stack. It is highly supected
that these bugs comes from an MTP implementation from Aricent, so it is called the Aricent
bug flags as a shorthand. Especially the header errors that need to be ignored is typical
for this stack.
After some guesswork we auto-assign these bug flags to devices that present the
'microsoft.com/WPDNA', and 'sonyericsson.com/SE' but NOT the 'android.com' descriptor.
#define DEVICE_FLAGS_SONY_NWZ_BUGS
Value:
(DEVICE_FLAG_UNLOAD_DRIVER | DEVICE_FLAG_BROKEN_MTPGETOBJPROPLIST | DEVICE_FLAG_UNIQUE_FILENAMES | DEVICE_FLAG_FORCE_RESET_ON_CLOSE)
All these bug flags need to be set on SONY NWZ Walkman players, and will be autodetected
on unknown devices by detecting the vendor extension descriptor 'sony.net'
Author
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