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/*
* 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.
*/
#define LOG_TAG "MtpPacket"
#include "MtpDebug.h"
#include "MtpPacket.h"
#include "mtp.h"
#include <stdio.h>
#include <stdlib.h>
#include <stdio.h>
#include <usbhost/usbhost.h>
namespace android {
MtpPacket::MtpPacket(int bufferSize)
: mBuffer(NULL),
mBufferSize(bufferSize),
mAllocationIncrement(bufferSize),
mPacketSize(0)
{
mBuffer = (uint8_t *)malloc(bufferSize);
if (!mBuffer) {
LOGE("out of memory!");
abort();
}
}
MtpPacket::~MtpPacket() {
if (mBuffer)
free(mBuffer);
}
void MtpPacket::reset() {
allocate(MTP_CONTAINER_HEADER_SIZE);
mPacketSize = MTP_CONTAINER_HEADER_SIZE;
memset(mBuffer, 0, mBufferSize);
}
void MtpPacket::allocate(int length) {
if (length > mBufferSize) {
int newLength = length + mAllocationIncrement;
mBuffer = (uint8_t *)realloc(mBuffer, newLength);
if (!mBuffer) {
LOGE("out of memory!");
abort();
}
mBufferSize = newLength;
}
}
void MtpPacket::dump() {
#define DUMP_BYTES_PER_ROW 16
char buffer[500];
char* bufptr = buffer;
for (int i = 0; i < mPacketSize; i++) {
sprintf(bufptr, "%02X ", mBuffer[i]);
bufptr += strlen(bufptr);
if (i % DUMP_BYTES_PER_ROW == (DUMP_BYTES_PER_ROW - 1)) {
LOGV("%s", buffer);
bufptr = buffer;
}
}
if (bufptr != buffer) {
// print last line
LOGV("%s", buffer);
}
LOGV("\n");
}
void MtpPacket::copyFrom(const MtpPacket& src) {
int length = src.mPacketSize;
allocate(length);
mPacketSize = length;
memcpy(mBuffer, src.mBuffer, length);
}
uint16_t MtpPacket::getUInt16(int offset) const {
return ((uint16_t)mBuffer[offset + 1] << 8) | (uint16_t)mBuffer[offset];
}
uint32_t MtpPacket::getUInt32(int offset) const {
return ((uint32_t)mBuffer[offset + 3] << 24) | ((uint32_t)mBuffer[offset + 2] << 16) |
((uint32_t)mBuffer[offset + 1] << 8) | (uint32_t)mBuffer[offset];
}
void MtpPacket::putUInt16(int offset, uint16_t value) {
mBuffer[offset++] = (uint8_t)(value & 0xFF);
mBuffer[offset++] = (uint8_t)((value >> 8) & 0xFF);
}
void MtpPacket::putUInt32(int offset, uint32_t value) {
mBuffer[offset++] = (uint8_t)(value & 0xFF);
mBuffer[offset++] = (uint8_t)((value >> 8) & 0xFF);
mBuffer[offset++] = (uint8_t)((value >> 16) & 0xFF);
mBuffer[offset++] = (uint8_t)((value >> 24) & 0xFF);
}
uint16_t MtpPacket::getContainerCode() const {
return getUInt16(MTP_CONTAINER_CODE_OFFSET);
}
void MtpPacket::setContainerCode(uint16_t code) {
putUInt16(MTP_CONTAINER_CODE_OFFSET, code);
}
uint16_t MtpPacket::getContainerType() const {
return getUInt16(MTP_CONTAINER_TYPE_OFFSET);
}
MtpTransactionID MtpPacket::getTransactionID() const {
return getUInt32(MTP_CONTAINER_TRANSACTION_ID_OFFSET);
}
void MtpPacket::setTransactionID(MtpTransactionID id) {
putUInt32(MTP_CONTAINER_TRANSACTION_ID_OFFSET, id);
}
uint32_t MtpPacket::getParameter(int index) const {
if (index < 1 || index > 5) {
LOGE("index %d out of range in MtpPacket::getParameter", index);
return 0;
}
return getUInt32(MTP_CONTAINER_PARAMETER_OFFSET + (index - 1) * sizeof(uint32_t));
}
void MtpPacket::setParameter(int index, uint32_t value) {
if (index < 1 || index > 5) {
LOGE("index %d out of range in MtpPacket::setParameter", index);
return;
}
int offset = MTP_CONTAINER_PARAMETER_OFFSET + (index - 1) * sizeof(uint32_t);
if (mPacketSize < offset + sizeof(uint32_t))
mPacketSize = offset + sizeof(uint32_t);
putUInt32(offset, value);
}
#ifdef MTP_HOST
int MtpPacket::transfer(struct usb_endpoint *ep, void* buffer, int length) {
if (usb_endpoint_queue(ep, buffer, length)) {
LOGE("usb_endpoint_queue failed, errno: %d", errno);
return -1;
}
int ep_num;
return usb_endpoint_wait(usb_endpoint_get_device(ep), &ep_num);
}
#endif
} // namespace android
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