MTP: Add extended operations to support in-place editing of files

MTP does not support partial writes of files (the entire file must be transferred at once).
This makes it impossible to implement a FUSE file system for MTP
with acceptable performance.
To fix this problem, this change adds extended MTP operations to allow
partial writes to files:

SendPartialObject - allows writing a subset of a file, or appending to the end of a file

TruncateObject - allows changing the size of a file

BeginEditObject - must be called before using SendPartialObject and TruncateObject

EndEditObject - commits changes to a file after it has been edited with SendPartialObject or TruncateObject

We also add GetPartialObject64, which is the same as GetPartialObject
but has a 64 bit offset rather than 32.

Change-Id: I4b110748b97ae05cdc8aab02ecdbbbeb263f7840
Signed-off-by: Mike Lockwood <lockwood@android.com>

1 files changed, 2 insertions, 1 deletions

diff --git a/media/mtp/MtpDatabase.h b/media/mtp/MtpDatabase.h
index 4d9a1ae..d7bde00 100644
--- a/media/mtp/MtpDatabase.h
+++ b/media/mtp/MtpDatabase.h
@@ -23,6 +23,7 @@ namespace android {
 
 class MtpDataPacket;
 class MtpProperty;
+class MtpObjectInfo;
 
 class MtpDatabase {
 public:
@@ -81,7 +82,7 @@ public:
                                             MtpDataPacket& packet) = 0;
 
     virtual MtpResponseCode         getObjectInfo(MtpObjectHandle handle,
-                                            MtpDataPacket& packet) = 0;
+                                            MtpObjectInfo& info) = 0;
 
     virtual MtpResponseCode         getObjectFilePath(MtpObjectHandle handle,
                                             MtpString& outFilePath,