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>
diff --git a/media/mtp/MtpClient.cpp b/media/mtp/MtpClient.cpp
new file mode 100644
index 0000000..5e4adb4
--- /dev/null
+++ b/media/mtp/MtpClient.cpp
@@ -0,0 +1,136 @@
+/*
+ * 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 <stdlib.h>
+#include <sys/types.h>
+#include <sys/ioctl.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <errno.h>
+
+#include <usbhost/usbhost.h>
+
+#include "MtpClient.h"
+#include "MtpDebug.h"
+#include "MtpStringBuffer.h"
+
+MtpClient::MtpClient(struct usb_endpoint *ep_in, struct usb_endpoint *ep_out,
+ struct usb_endpoint *ep_intr)
+ : mEndpointIn(ep_in),
+ mEndpointOut(ep_out),
+ mEndpointIntr(ep_intr),
+ mSessionID(0),
+ mTransactionID(0)
+{
+
+}
+
+MtpClient::~MtpClient() {
+}
+
+
+bool MtpClient::openSession() {
+printf("openSession\n");
+ mSessionID = 0;
+ mTransactionID = 0;
+ MtpSessionID newSession = 1;
+ mRequest.reset();
+ mRequest.setParameter(1, newSession);
+ if (!sendRequest(MTP_OPERATION_OPEN_SESSION))
+ return false;
+ MtpResponseCode ret = readResponse();
+ if (ret == MTP_RESPONSE_SESSION_ALREADY_OPEN)
+ newSession = mResponse.getParameter(1);
+ else if (ret != MTP_RESPONSE_OK)
+ return false;
+
+ mSessionID = newSession;
+ mTransactionID = 1;
+ return true;
+}
+
+bool MtpClient::getDeviceInfo() {
+ mRequest.reset();
+ if (!sendRequest(MTP_OPERATION_GET_DEVICE_INFO))
+ return false;
+ if (!readData())
+ return false;
+ MtpResponseCode ret = readResponse();
+ if (ret == MTP_RESPONSE_OK) {
+ MtpStringBuffer string;
+
+ // fill in device info
+ printf("MTP standard version: %d\n", mData.getUInt16());
+ printf("MTP Vendor Extension ID: %d\n", mData.getUInt32());
+ printf("MTP vendor extension version: %d\n", mData.getUInt16());
+ mData.getString(string);
+ printf("vendor extension desc %s\n", (const char *)string);
+
+ return true;
+ }
+ return false;
+}
+
+bool MtpClient::closeSession() {
+ return true;
+}
+
+bool MtpClient::sendRequest(MtpOperationCode operation) {
+ printf("sendRequest: %s\n", MtpDebug::getOperationCodeName(operation));
+ mRequest.setOperationCode(operation);
+ if (mTransactionID > 0)
+ mRequest.setTransactionID(mTransactionID++);
+ int ret = mRequest.write(mEndpointOut);
+ mRequest.dump();
+ return (ret > 0);
+}
+
+bool MtpClient::sendData(MtpOperationCode operation) {
+ printf("sendData\n");
+ mData.setOperationCode(mRequest.getOperationCode());
+ mData.setTransactionID(mRequest.getTransactionID());
+ int ret = mData.write(mEndpointOut);
+ mData.dump();
+ return (ret > 0);
+}
+
+bool MtpClient::readData() {
+ int ret = mData.read(mEndpointIn);
+ printf("readData returned %d\n", ret);
+ if (ret >= MTP_CONTAINER_HEADER_SIZE) {
+ mData.dump();
+ return true;
+ }
+ else {
+ printf("readResponse failed\n");
+ return false;
+ }
+}
+
+MtpResponseCode MtpClient::readResponse() {
+ printf("readResponse\n");
+ int ret = mResponse.read(mEndpointIn);
+ if (ret >= MTP_CONTAINER_HEADER_SIZE) {
+ mResponse.dump();
+ return mResponse.getResponseCode();
+ }
+ else {
+ printf("readResponse failed\n");
+ return -1;
+ }
+}
+