1 /*
2 * Copyright (C) 2022 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 #include <algorithm>
18 #include <cstdint>
19 #include <cstring>
20 #include <sys/mman.h>
21 #define LOG_TAG "EffectBufferHalAidl"
22 //#define LOG_NDEBUG 0
23
24 #include <cutils/ashmem.h>
25 #include <utils/Log.h>
26
27 #include "EffectBufferHalAidl.h"
28
29 using ndk::ScopedFileDescriptor;
30
31 namespace android {
32 namespace effect {
33
34 // static
allocate(size_t size,sp<EffectBufferHalInterface> * buffer)35 status_t EffectBufferHalAidl::allocate(size_t size, sp<EffectBufferHalInterface>* buffer) {
36 return mirror(nullptr, size, buffer);
37 }
38
mirror(void * external,size_t size,sp<EffectBufferHalInterface> * buffer)39 status_t EffectBufferHalAidl::mirror(void* external, size_t size,
40 sp<EffectBufferHalInterface>* buffer) {
41 sp<EffectBufferHalAidl> tempBuffer = new EffectBufferHalAidl(size);
42 status_t status = tempBuffer.get()->init();
43 if (status != OK) {
44 ALOGE("%s init failed %d", __func__, status);
45 return status;
46 }
47
48 tempBuffer->setExternalData(external);
49 *buffer = tempBuffer;
50 return OK;
51 }
52
EffectBufferHalAidl(size_t size)53 EffectBufferHalAidl::EffectBufferHalAidl(size_t size)
54 : mBufferSize(size),
55 mFrameCountChanged(false),
56 mExternalData(nullptr),
57 mAudioBuffer{0, {nullptr}} {
58 }
59
~EffectBufferHalAidl()60 EffectBufferHalAidl::~EffectBufferHalAidl() {
61 }
62
init()63 status_t EffectBufferHalAidl::init() {
64 int fd = ashmem_create_region("audioEffectAidl", mBufferSize);
65 if (fd < 0) {
66 ALOGE("%s create ashmem failed %d", __func__, fd);
67 return fd;
68 }
69
70 ScopedFileDescriptor tempFd(fd);
71 mAudioBuffer.raw = mmap(nullptr /* address */, mBufferSize /* length */, PROT_READ | PROT_WRITE,
72 MAP_SHARED, fd, 0 /* offset */);
73 if (mAudioBuffer.raw == MAP_FAILED) {
74 ALOGE("mmap failed for fd %d", fd);
75 mAudioBuffer.raw = nullptr;
76 return INVALID_OPERATION;
77 }
78
79 mMemory = {std::move(tempFd), static_cast<int64_t>(mBufferSize)};
80 return OK;
81 }
82
audioBuffer()83 audio_buffer_t* EffectBufferHalAidl::audioBuffer() {
84 return &mAudioBuffer;
85 }
86
externalData() const87 void* EffectBufferHalAidl::externalData() const {
88 return mExternalData;
89 }
90
setFrameCount(size_t frameCount)91 void EffectBufferHalAidl::setFrameCount(size_t frameCount) {
92 mAudioBuffer.frameCount = frameCount;
93 mFrameCountChanged = true;
94 }
95
checkFrameCountChange()96 bool EffectBufferHalAidl::checkFrameCountChange() {
97 bool result = mFrameCountChanged;
98 mFrameCountChanged = false;
99 return result;
100 }
101
setExternalData(void * external)102 void EffectBufferHalAidl::setExternalData(void* external) {
103 mExternalData = external;
104 }
105
update()106 void EffectBufferHalAidl::update() {
107 update(mBufferSize);
108 }
109
commit()110 void EffectBufferHalAidl::commit() {
111 commit(mBufferSize);
112 }
113
copy(void * dst,const void * src,size_t n) const114 void EffectBufferHalAidl::copy(void* dst, const void* src, size_t n) const {
115 if (!dst || !src) {
116 return;
117 }
118 std::memcpy(dst, src, std::min(n, mBufferSize));
119 }
120
update(size_t n)121 void EffectBufferHalAidl::update(size_t n) {
122 copy(mAudioBuffer.raw, mExternalData, n);
123 }
124
commit(size_t n)125 void EffectBufferHalAidl::commit(size_t n) {
126 copy(mExternalData, mAudioBuffer.raw, n);
127 }
128
129 } // namespace effect
130 } // namespace android
131