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 "effectcontrol_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 GET_BUFFER_LEN = 10;
30
31enum EffectControlCmdId {
32    EFFECT_CONTROL_EFFECT_PROCESS,
33    EFFECT_CONTROL_SEND_COMMAND,
34    EFFECT_CONTROL_GET_DESCRIPTOR,
35    EFFECT_CONTROL_EFFECT_REVERSE,
36};
37
38static uint32_t Convert2Uint32(const uint8_t *ptr)
39{
40    if (ptr == nullptr) {
41        return 0;
42    }
43    /*
44     * Move the 0th digit 24 to the left, the first digit 16 to the left, the second digit 8 to the left,
45     * and the third digit no left
46     */
47    return (ptr[0] << 24) | (ptr[1] << 16) | (ptr[2] << 8) | (ptr[3]);
48}
49
50void EffectControlFucSwitch(struct IEffectControl *&controller, uint32_t cmd, const uint8_t *&rawData, size_t size)
51{
52    uint8_t *data = const_cast<uint8_t *>(rawData);
53    switch (cmd) {
54        case EFFECT_CONTROL_EFFECT_PROCESS: {
55            struct AudioEffectBuffer output = {0};
56            controller->EffectProcess(controller, reinterpret_cast<AudioEffectBuffer *>(data), &output);
57            break;
58        }
59        case EFFECT_CONTROL_SEND_COMMAND: {
60            int8_t output[GET_BUFFER_LEN] = {0};
61            uint32_t replyLen = GET_BUFFER_LEN;
62            controller->SendCommand(controller, (*data) % AUDIO_EFFECT_COMMAND_GET_PARAM,
63                                        reinterpret_cast<int8_t *>(data), size, output, &replyLen);
64            break;
65        }
66        case EFFECT_CONTROL_GET_DESCRIPTOR: {
67            struct EffectControllerDescriptor desc;
68            controller->GetEffectDescriptor(controller, &desc);
69            break;
70        }
71        case EFFECT_CONTROL_EFFECT_REVERSE: {
72            struct AudioEffectBuffer output = {0};
73            controller->EffectReverse(controller, reinterpret_cast<struct AudioEffectBuffer *>(data), &output);
74            break;
75        }
76        default:
77            return;
78    }
79}
80
81bool DoSomethingInterestingWithMyAPI(const uint8_t *rawData, size_t size)
82{
83    if (rawData == nullptr) {
84        return false;
85    }
86    uint32_t cmd = Convert2Uint32(rawData) % EFFECT_CONTROL_EFFECT_REVERSE;
87    rawData = rawData + OFFSET;
88
89    struct IEffectModel *model = IEffectModelGet(true);
90    if (model == nullptr) {
91        return false;
92    }
93
94    char *libName = strdup("libmock_effect_lib");
95    char *effectId = strdup("aaaabbbb-8888-9999-6666-aabbccdd9966ff");
96    struct EffectInfo info = {
97        .libName = libName,
98        .effectId = effectId,
99        .ioDirection = 1,
100    };
101    struct IEffectControl *controller = nullptr;
102    struct ControllerId contollerId;
103
104    int32_t ret = model->CreateEffectController(model, &info, &controller, &contollerId);
105    if (ret != HDF_SUCCESS) {
106        return false;
107    }
108    if (controller == nullptr) {
109        return false;
110    }
111
112    EffectControlFucSwitch(controller, cmd, rawData, size);
113
114    if (libName != nullptr) {
115        free(libName);
116        libName = nullptr;
117    }
118    if (effectId != nullptr) {
119        free(effectId);
120        effectId = nullptr;
121    }
122
123    ret = model->DestroyEffectController(model, &contollerId);
124    if (ret != HDF_SUCCESS) {
125        return false;
126    }
127    IEffectModelRelease(model, true);
128    return true;
129}
130}
131}
132
133extern "C" int LLVMFuzzerTestOneInput(const uint8_t *data, size_t size)
134{
135    if (size < OHOS::Audio::THRESHOLD) {
136        return 0;
137    }
138    OHOS::Audio::DoSomethingInterestingWithMyAPI(data, size);
139    return 0;
140}