From 0fa848d780cf990a2860637f40432d28594c85a3 Mon Sep 17 00:00:00 2001
From: Mike Lockwood <lockwood@google.com>
Date: Fri, 7 Mar 2014 13:29:59 -0800
Subject: MTP: Add support for device property changed events

Also fixed bug in MtpProperty::write() for device properties

Bug: 7342482
Change-Id: If0099095d101409d131564e55b1939895c69c202
---
 media/mtp/MtpProperty.cpp | 4 ++--
 media/mtp/MtpServer.cpp   | 6 ++++++
 media/mtp/MtpServer.h     | 1 +
 3 files changed, 9 insertions(+), 2 deletions(-)

diff --git a/media/mtp/MtpProperty.cpp b/media/mtp/MtpProperty.cpp
index 375ed9a..3838ce8 100644
--- a/media/mtp/MtpProperty.cpp
+++ b/media/mtp/MtpProperty.cpp
@@ -190,9 +190,9 @@ void MtpProperty::write(MtpDataPacket& packet) {
             if (deviceProp)
                 writeValue(packet, mCurrentValue);
     }
-    packet.putUInt32(mGroupCode);
     if (!deviceProp)
-        packet.putUInt8(mFormFlag);
+        packet.putUInt32(mGroupCode);
+    packet.putUInt8(mFormFlag);
     if (mFormFlag == kFormRange) {
             writeValue(packet, mMinimumValue);
             writeValue(packet, mMaximumValue);
diff --git a/media/mtp/MtpServer.cpp b/media/mtp/MtpServer.cpp
index df87db4..dadfb54 100644
--- a/media/mtp/MtpServer.cpp
+++ b/media/mtp/MtpServer.cpp
@@ -93,6 +93,7 @@ static const MtpEventCode kSupportedEventCodes[] = {
     MTP_EVENT_OBJECT_REMOVED,
     MTP_EVENT_STORE_ADDED,
     MTP_EVENT_STORE_REMOVED,
+    MTP_EVENT_DEVICE_PROP_CHANGED,
 };
 
 MtpServer::MtpServer(int fd, MtpDatabase* database, bool ptp,
@@ -261,6 +262,11 @@ void MtpServer::sendStoreRemoved(MtpStorageID id) {
     sendEvent(MTP_EVENT_STORE_REMOVED, id);
 }
 
+void MtpServer::sendDevicePropertyChanged(MtpDeviceProperty property) {
+    ALOGV("sendDevicePropertyChanged %d\n", property);
+    sendEvent(MTP_EVENT_DEVICE_PROP_CHANGED, property);
+}
+
 void MtpServer::sendEvent(MtpEventCode code, uint32_t param1) {
     if (mSessionOpen) {
         mEvent.setEventCode(code);
diff --git a/media/mtp/MtpServer.h b/media/mtp/MtpServer.h
index dfa8258..b3a11e0 100644
--- a/media/mtp/MtpServer.h
+++ b/media/mtp/MtpServer.h
@@ -104,6 +104,7 @@ public:
 
     void                sendObjectAdded(MtpObjectHandle handle);
     void                sendObjectRemoved(MtpObjectHandle handle);
+    void                sendDevicePropertyChanged(MtpDeviceProperty property);
 
 private:
     void                sendStoreAdded(MtpStorageID id);
-- 
cgit v1.1