Some README update
Signed-off-by: Linus Walleij <[email protected]>
diff --git a/README b/README
index 7b382bb..b7463ab 100644
--- a/README
+++ b/README
@@ -1010,18 +1010,33 @@
- Protocol overview
- Transactional filesystem - no corruption due to unplugged cables!
+ - The host and the device can access the files simultaneously, the
+ device will always "own" the physical file system and proxy the
+ host (MTP initiator).
- libmtp interface
- relation to libgphoto2
- User expectations fall short:
- Not really a mountable filesystem.
- Streaming does not work. (Size needs to be known beforehand due to
transactional nature.)
+ - GVFS MTP backend to the rescue.
- Device sins
- Android bugs
- Samsungs special Android MTP stack
- SonyEricsson Aricent stack for Xperia Androids pre 4.0, broken headers!
- Flat access model vs hierarchical, how Android uses MTP as an hierachical
file system while it was previously a flat database.
+ - Old paradigm: scan the entire non-hierarchical storage for all content,
+ build a cache to speed up the (USB 1.1!) link. Usually all files were
+ stored in the root folder or a single folder named "/Music" or similar.
+ - Android introduced deeply nested folder hierarchies, not seen before
+ on MTP devices.
+ - Microsoft not using the complete metadata dump feature of the MTP
+ protocol (once introduced by creative) instead they walk directories
+ separately.
+ - So caching a big device will take long time and/or timeout.
+ - Go-MTPFS (FUSE) and GVFS MTP - doing the partial directory walk rather
+ than caching all files.
- Detecting from vendor extension, can fix in newer extensions!
- Autoprobing on Linux
- Color devices do not like autoprobing
@@ -1030,7 +1045,8 @@
- Multimode USB - one PID for each mode due to Windows limitations not
applicable to Linux, SONY devices have ~5 different PIDs for a single
device.
- - Mode switch devices?
-- MTPZ
+ - Mode switch devices? Maybe we do this wrong.
+- MTPZ, came and went. Apparently deprecated by Microsoft with Windows
+ Phone 8.
- Ideas??
