Checkpoint work on MTP and PTP investigation.

This change includes work in progress on a C++ library for both host and device
MTP and PTP support.
Currently the makefile builds two test programs:

mtptest - a command line test program that implements a small subset of device side MTP.
Requires a kernel driver that has not been checked in yet.

ptptest - a host tool to test USB host support for detecting and communicating with
digital cameras over PTP.  Runs on Linux host.

Later this will be reformulated as a native library that will be used in the media process.

Change-Id: I81aab279975b600b59d99013ab97f9adf0b58da7
Signed-off-by: Mike Lockwood <lockwood@android.com>

1 files changed, 52 insertions, 0 deletions

diff --git a/media/mtp/MtpResponsePacket.cpp b/media/mtp/MtpResponsePacket.cpp
new file mode 100644
index 0000000..6ebac9e
--- /dev/null
+++ b/media/mtp/MtpResponsePacket.cpp
@@ -0,0 +1,52 @@
+/*
+ * Copyright (C) 2010 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <stdio.h>
+#include <sys/types.h>
+#include <fcntl.h>
+
+#include "MtpResponsePacket.h"
+
+MtpResponsePacket::MtpResponsePacket()
+    :   MtpPacket(512)
+{
+}
+
+MtpResponsePacket::~MtpResponsePacket() {
+}
+
+#ifdef MTP_DEVICE
+int MtpResponsePacket::write(int fd) {
+    putUInt32(MTP_CONTAINER_LENGTH_OFFSET, mPacketSize);
+    putUInt16(MTP_CONTAINER_TYPE_OFFSET, MTP_CONTAINER_TYPE_RESPONSE);
+    int ret = ::write(fd, mBuffer, mPacketSize);
+    return (ret < 0 ? ret : 0);
+}
+#endif
+
+#ifdef MTP_HOST
+    // read our buffer from the given endpoint
+int MtpResponsePacket::read(struct usb_endpoint *ep) {
+    int ret = transfer(ep, mBuffer, mBufferSize);
+     if (ret >= 0)
+        mPacketSize = ret;
+    else
+        mPacketSize = 0;
+    return ret;
+}
+#endif
+
+