From 5ed68d29a140e14c8d46980fa844548eb33b1e87 Mon Sep 17 00:00:00 2001 From: Mike Lockwood Date: Tue, 25 May 2010 19:08:48 -0400 Subject: Prototype Content Provider support for MTP/PTP devices. At this point much of the plumbing is in place, but only a few simple queries are supported. This is enough to support a proof of concept sample program that navigates the file hierarchy of a digital camera connected via USB. Also removed obsolete ptptest host test program. Change-Id: I17644344b9f0ce1ecc302bc0478c1f3d44a1647f Signed-off-by: Mike Lockwood --- media/mtp/MtpDevice.cpp | 230 ++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 230 insertions(+) create mode 100644 media/mtp/MtpDevice.cpp (limited to 'media/mtp/MtpDevice.cpp') diff --git a/media/mtp/MtpDevice.cpp b/media/mtp/MtpDevice.cpp new file mode 100644 index 0000000..0282086 --- /dev/null +++ b/media/mtp/MtpDevice.cpp @@ -0,0 +1,230 @@ +/* + * 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 +#include +#include +#include +#include +#include +#include + +#include + +#include "MtpDevice.h" +#include "MtpDebug.h" +#include "MtpDeviceInfo.h" +#include "MtpObjectInfo.h" +#include "MtpStorageInfo.h" +#include "MtpStringBuffer.h" + +namespace android { + +MtpDevice::MtpDevice(struct usb_device* device, int interface, + struct usb_endpoint *ep_in, struct usb_endpoint *ep_out, + struct usb_endpoint *ep_intr) + : mDevice(device), + mInterface(interface), + mEndpointIn(ep_in), + mEndpointOut(ep_out), + mEndpointIntr(ep_intr), + mDeviceInfo(NULL), + mID(usb_device_get_unique_id(device)), + mSessionID(0), + mTransactionID(0) +{ +} + +MtpDevice::~MtpDevice() { + close(); +} + +void MtpDevice::initialize() { + openSession(); + mDeviceInfo = getDeviceInfo(); + if (mDeviceInfo) { + mDeviceInfo->print(); + } +} + +void MtpDevice::close() { + if (mDevice) { + usb_device_release_interface(mDevice, mInterface); + usb_device_close(mDevice); + mDevice = NULL; + } +} + +const char* MtpDevice::getDeviceName() { + if (mDevice) + return usb_device_get_name(mDevice); + else + return "???"; +} + +bool MtpDevice::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 MtpDevice::closeSession() { + // FIXME + return true; +} + +MtpDeviceInfo* MtpDevice::getDeviceInfo() { + mRequest.reset(); + if (!sendRequest(MTP_OPERATION_GET_DEVICE_INFO)) + return NULL; + if (!readData()) + return NULL; + MtpResponseCode ret = readResponse(); +printf("getDeviceInfo returned %04X\n", ret); + if (ret == MTP_RESPONSE_OK) { + MtpDeviceInfo* info = new MtpDeviceInfo; + info->read(mData); + return info; + } + return NULL; +} + +MtpStorageIDList* MtpDevice::getStorageIDs() { + mRequest.reset(); + if (!sendRequest(MTP_OPERATION_GET_STORAGE_IDS)) + return NULL; + if (!readData()) + return NULL; + MtpResponseCode ret = readResponse(); + if (ret == MTP_RESPONSE_OK) { + return mData.getAUInt32(); + } + return NULL; +} + +MtpStorageInfo* MtpDevice::getStorageInfo(MtpStorageID storageID) { + mRequest.reset(); + mRequest.setParameter(1, storageID); + if (!sendRequest(MTP_OPERATION_GET_STORAGE_INFO)) + return NULL; + if (!readData()) + return NULL; + MtpResponseCode ret = readResponse(); +printf("getStorageInfo returned %04X\n", ret); + if (ret == MTP_RESPONSE_OK) { + MtpStorageInfo* info = new MtpStorageInfo(storageID); + info->read(mData); + return info; + } + return NULL; +} + +MtpObjectHandleList* MtpDevice::getObjectHandles(MtpStorageID storageID, + MtpObjectFormat format, MtpObjectHandle parent) { + mRequest.reset(); + mRequest.setParameter(1, storageID); + mRequest.setParameter(2, format); + mRequest.setParameter(3, parent); + if (!sendRequest(MTP_OPERATION_GET_OBJECT_HANDLES)) + return NULL; + if (!readData()) + return NULL; + MtpResponseCode ret = readResponse(); +printf("getObjectHandles returned %04X\n", ret); + if (ret == MTP_RESPONSE_OK) { + return mData.getAUInt32(); + } + return NULL; +} + +MtpObjectInfo* MtpDevice::getObjectInfo(MtpObjectHandle handle) { + mRequest.reset(); + mRequest.setParameter(1, handle); + if (!sendRequest(MTP_OPERATION_GET_OBJECT_INFO)) + return NULL; + if (!readData()) + return NULL; + MtpResponseCode ret = readResponse(); +printf("getObjectInfo returned %04X\n", ret); + if (ret == MTP_RESPONSE_OK) { + MtpObjectInfo* info = new MtpObjectInfo(handle); + info->read(mData); + return info; + } + return NULL; +} + +bool MtpDevice::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 MtpDevice::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 MtpDevice::readData() { + mData.reset(); + 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 MtpDevice::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; + } +} + +} // namespace android -- cgit v1.1