1/*
2 * Copyright (c) 2023 Huawei Device Co., Ltd.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at
6 *
7 *     http://www.apache.org/licenses/LICENSE-2.0
8 *
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
14 */
15
16#include "effectmodel_fuzzer.h"
17
18#include <cstdlib>
19#include "v1_0/effect_types.h"
20#include "v1_0/ieffect_control.h"
21#include "v1_0/ieffect_model.h"
22
23using namespace std;
24
25namespace OHOS {
26namespace Audio {
27constexpr int32_t OFFSET = 4;
28constexpr size_t THRESHOLD = 10;
29constexpr uint32_t MAX_DESCRIPTOR_NUM = 20;
30
31enum EffectModelCmdId {
32    EFFECT_MODEL_IS_SUPPLY_LIBS,
33    EFFECT_MODEL_GET_ALL_DESCRIPTORS,
34    EFFECT_MODEL_CREATE_EFFECT_CONTROLLER,
35    EFFECT_MODEL_DESTROY_EFFECT_CONTROLLER,
36    EFFECT_MODEL_GET_EFFECT_DESCRIPTOR,
37};
38
39static uint32_t Convert2Uint32(const uint8_t *ptr)
40{
41    if (ptr == nullptr) {
42        return 0;
43    }
44    /*
45     * Move the 0th digit 24 to the left, the first digit 16 to the left, the second digit 8 to the left,
46     * and the third digit no left
47     */
48    return (ptr[0] << 24) | (ptr[1] << 16) | (ptr[2] << 8) | (ptr[3]);
49}
50
51void EffectModelFucSwitch(struct IEffectModel *&model, uint32_t cmd, const uint8_t *&rawData, size_t size)
52{
53    uint8_t *data = const_cast<uint8_t *>(rawData);
54    switch (cmd) {
55        case EFFECT_MODEL_IS_SUPPLY_LIBS: {
56            bool isSupport = false;
57            model->IsSupplyEffectLibs(model, &isSupport);
58            break;
59        }
60        case EFFECT_MODEL_GET_ALL_DESCRIPTORS: {
61            uint32_t descsLen = MAX_DESCRIPTOR_NUM;
62            struct EffectControllerDescriptor descs[MAX_DESCRIPTOR_NUM];
63            model->GetAllEffectDescriptors(model, descs, &descsLen);
64            break;
65        }
66        case EFFECT_MODEL_CREATE_EFFECT_CONTROLLER: {
67            struct IEffectControl *contoller = nullptr;
68            struct ControllerId contollerId;
69            struct EffectInfo info = {
70                .libName = reinterpret_cast<char *>(data),
71                .effectId = reinterpret_cast<char *>(data),
72                .ioDirection = 1,
73    };
74            model->CreateEffectController(model, &info, &contoller, &contollerId);
75            break;
76        }
77        case EFFECT_MODEL_DESTROY_EFFECT_CONTROLLER: {
78            struct ControllerId contollerId{
79                .libName = reinterpret_cast<char *>(data),
80                .effectId = reinterpret_cast<char *>(data),
81            };
82            model->DestroyEffectController(model, &contollerId);
83            break;
84        }
85        case EFFECT_MODEL_GET_EFFECT_DESCRIPTOR: {
86            struct EffectControllerDescriptor desc;
87            model->GetEffectDescriptor(model, reinterpret_cast<const char *>(data), &desc);
88            break;
89        }
90        default:
91            return;
92    }
93}
94
95bool DoSomethingInterestingWithMyAPI(const uint8_t *rawData, size_t size)
96{
97    if (rawData == nullptr) {
98        return false;
99    }
100    uint32_t cmd = Convert2Uint32(rawData) % EFFECT_MODEL_GET_EFFECT_DESCRIPTOR;
101    rawData = rawData + OFFSET;
102
103    struct IEffectModel *model = IEffectModelGet(true);
104    if (model == nullptr) {
105        return false;
106    }
107
108    EffectModelFucSwitch(model, cmd, rawData, size);
109
110    if (model != nullptr) {
111        IEffectModelRelease(model, true);
112    }
113    return true;
114}
115}
116}
117
118extern "C" int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size)
119{
120    if (size < OHOS::Audio::THRESHOLD) {
121        return 0;
122    }
123
124    if(data == nullptr) {
125        return 0;
126    }
127
128    for (int i = 0; i < size - 1; i++) {
129        if (data[i] == '\0') {
130            return 0;
131        }
132    }
133
134    if (data[size -1] != '\0') {
135        return 0;
136    }
137    OHOS::Audio::DoSomethingInterestingWithMyAPI(data, size);
138    return 0;
139}