1/*
2 * Copyright (C) 2016 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17#define LOG_TAG "MidiDeviceInfo"
18
19#include "MidiDeviceInfo.h"
20
21#include <binder/Parcel.h>
22#include <log/log.h>
23#include <utils/Errors.h>
24#include <utils/String16.h>
25
26namespace android {
27namespace media {
28namespace midi {
29
30// The constant values need to be kept in sync with MidiDeviceInfo.java.
31// static
32const char* const MidiDeviceInfo::PROPERTY_NAME = "name";
33const char* const MidiDeviceInfo::PROPERTY_MANUFACTURER = "manufacturer";
34const char* const MidiDeviceInfo::PROPERTY_PRODUCT = "product";
35const char* const MidiDeviceInfo::PROPERTY_VERSION = "version";
36const char* const MidiDeviceInfo::PROPERTY_SERIAL_NUMBER = "serial_number";
37const char* const MidiDeviceInfo::PROPERTY_ALSA_CARD = "alsa_card";
38const char* const MidiDeviceInfo::PROPERTY_ALSA_DEVICE = "alsa_device";
39
40String16 MidiDeviceInfo::getProperty(const char* propertyName) {
41    String16 value;
42    if (mProperties.getString(String16(propertyName), &value)) {
43        return value;
44    } else {
45        return String16();
46    }
47}
48
49#define RETURN_IF_FAILED(calledOnce)                                     \
50    {                                                                    \
51        status_t returnStatus = calledOnce;                              \
52        if (returnStatus) {                                              \
53            ALOGE("Failed at %s:%d (%s)", __FILE__, __LINE__, __func__); \
54            return returnStatus;                                         \
55         }                                                               \
56    }
57
58status_t MidiDeviceInfo::writeToParcel(Parcel* parcel) const {
59    // Needs to be kept in sync with code in MidiDeviceInfo.java
60    RETURN_IF_FAILED(parcel->writeInt32(mType));
61    RETURN_IF_FAILED(parcel->writeInt32(mId));
62    RETURN_IF_FAILED(parcel->writeInt32((int32_t)mInputPortNames.size()));
63    RETURN_IF_FAILED(parcel->writeInt32((int32_t)mOutputPortNames.size()));
64    RETURN_IF_FAILED(writeStringVector(parcel, mInputPortNames));
65    RETURN_IF_FAILED(writeStringVector(parcel, mOutputPortNames));
66    RETURN_IF_FAILED(parcel->writeInt32(mIsPrivate ? 1 : 0));
67    RETURN_IF_FAILED(mProperties.writeToParcel(parcel));
68    // This corresponds to "extra" properties written by Java code
69    RETURN_IF_FAILED(mProperties.writeToParcel(parcel));
70    return OK;
71}
72
73status_t MidiDeviceInfo::readFromParcel(const Parcel* parcel) {
74    // Needs to be kept in sync with code in MidiDeviceInfo.java
75    RETURN_IF_FAILED(parcel->readInt32(&mType));
76    RETURN_IF_FAILED(parcel->readInt32(&mId));
77    int32_t inputPortCount;
78    RETURN_IF_FAILED(parcel->readInt32(&inputPortCount));
79    int32_t outputPortCount;
80    RETURN_IF_FAILED(parcel->readInt32(&outputPortCount));
81    RETURN_IF_FAILED(readStringVector(parcel, &mInputPortNames, inputPortCount));
82    RETURN_IF_FAILED(readStringVector(parcel, &mOutputPortNames, outputPortCount));
83    int32_t isPrivate;
84    RETURN_IF_FAILED(parcel->readInt32(&isPrivate));
85    mIsPrivate = isPrivate == 1;
86    RETURN_IF_FAILED(mProperties.readFromParcel(parcel));
87    // Ignore "extra" properties as they may contain Java Parcelables
88    return OK;
89}
90
91status_t MidiDeviceInfo::readStringVector(
92        const Parcel* parcel, Vector<String16> *vectorPtr, size_t defaultLength) {
93    std::unique_ptr<std::vector<std::unique_ptr<String16>>> v;
94    status_t result = parcel->readString16Vector(&v);
95    if (result != OK) return result;
96    vectorPtr->clear();
97    if (v.get() != nullptr) {
98        for (const auto& iter : *v) {
99            if (iter.get() != nullptr) {
100                vectorPtr->push_back(*iter);
101            } else {
102                vectorPtr->push_back(String16());
103            }
104        }
105    } else {
106        vectorPtr->resize(defaultLength);
107    }
108    return OK;
109}
110
111status_t MidiDeviceInfo::writeStringVector(Parcel* parcel, const Vector<String16>& vector) const {
112    std::vector<String16> v;
113    for (size_t i = 0; i < vector.size(); ++i) {
114        v.push_back(vector[i]);
115    }
116    return parcel->writeString16Vector(v);
117}
118
119// Vector does not define operator==
120static inline bool areVectorsEqual(const Vector<String16>& lhs, const Vector<String16>& rhs) {
121    if (lhs.size() != rhs.size()) return false;
122    for (size_t i = 0; i < lhs.size(); ++i) {
123        if (lhs[i] != rhs[i]) return false;
124    }
125    return true;
126}
127
128bool operator==(const MidiDeviceInfo& lhs, const MidiDeviceInfo& rhs) {
129    return (lhs.mType == rhs.mType && lhs.mId == rhs.mId &&
130            areVectorsEqual(lhs.mInputPortNames, rhs.mInputPortNames) &&
131            areVectorsEqual(lhs.mOutputPortNames, rhs.mOutputPortNames) &&
132            lhs.mProperties == rhs.mProperties &&
133            lhs.mIsPrivate == rhs.mIsPrivate);
134}
135
136}  // namespace midi
137}  // namespace media
138}  // namespace android
139