1 /*
2 * Copyright (C) 2017 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 <atomic>
18
19 #define LOG_TAG "EffectBufferHalHidl"
20 //#define LOG_NDEBUG 0
21
22 #include <android/hidl/allocator/1.0/IAllocator.h>
23 #include <hidlmemory/mapping.h>
24 #include <utils/Log.h>
25
26 #include "ConversionHelperHidl.h"
27 #include "EffectBufferHalHidl.h"
28
29 using ::android::hardware::Return;
30 using ::android::hidl::allocator::V1_0::IAllocator;
31
32 namespace android {
33 namespace V4_0 {
34
35 // static
makeUniqueId()36 uint64_t EffectBufferHalHidl::makeUniqueId() {
37 static std::atomic<uint64_t> counter{1};
38 return counter++;
39 }
40
allocate(size_t size,sp<EffectBufferHalInterface> * buffer)41 status_t EffectBufferHalHidl::allocate(
42 size_t size, sp<EffectBufferHalInterface>* buffer) {
43 return mirror(nullptr, size, buffer);
44 }
45
mirror(void * external,size_t size,sp<EffectBufferHalInterface> * buffer)46 status_t EffectBufferHalHidl::mirror(
47 void* external, size_t size, sp<EffectBufferHalInterface>* buffer) {
48 sp<EffectBufferHalInterface> tempBuffer = new EffectBufferHalHidl(size);
49 status_t result = static_cast<EffectBufferHalHidl*>(tempBuffer.get())->init();
50 if (result == OK) {
51 tempBuffer->setExternalData(external);
52 *buffer = tempBuffer;
53 }
54 return result;
55 }
56
EffectBufferHalHidl(size_t size)57 EffectBufferHalHidl::EffectBufferHalHidl(size_t size)
58 : mBufferSize(size), mFrameCountChanged(false),
59 mExternalData(nullptr), mAudioBuffer{0, {nullptr}} {
60 mHidlBuffer.id = makeUniqueId();
61 mHidlBuffer.frameCount = 0;
62 }
63
~EffectBufferHalHidl()64 EffectBufferHalHidl::~EffectBufferHalHidl() {
65 }
66
init()67 status_t EffectBufferHalHidl::init() {
68 sp<IAllocator> ashmem = IAllocator::getService("ashmem");
69 if (ashmem == 0) {
70 ALOGE("Failed to retrieve ashmem allocator service");
71 return NO_INIT;
72 }
73 status_t retval = NO_MEMORY;
74 Return<void> result = ashmem->allocate(
75 mBufferSize,
76 [&](bool success, const hidl_memory& memory) {
77 if (success) {
78 mHidlBuffer.data = memory;
79 retval = OK;
80 }
81 });
82 if (result.isOk() && retval == OK) {
83 mMemory = hardware::mapMemory(mHidlBuffer.data);
84 if (mMemory != 0) {
85 mMemory->update();
86 mAudioBuffer.raw = static_cast<void*>(mMemory->getPointer());
87 memset(mAudioBuffer.raw, 0, mMemory->getSize());
88 mMemory->commit();
89 } else {
90 ALOGE("Failed to map allocated ashmem");
91 retval = NO_MEMORY;
92 }
93 } else {
94 ALOGE("Failed to allocate %d bytes from ashmem", (int)mBufferSize);
95 }
96 return result.isOk() ? retval : FAILED_TRANSACTION;
97 }
98
audioBuffer()99 audio_buffer_t* EffectBufferHalHidl::audioBuffer() {
100 return &mAudioBuffer;
101 }
102
externalData() const103 void* EffectBufferHalHidl::externalData() const {
104 return mExternalData;
105 }
106
setFrameCount(size_t frameCount)107 void EffectBufferHalHidl::setFrameCount(size_t frameCount) {
108 mHidlBuffer.frameCount = frameCount;
109 mAudioBuffer.frameCount = frameCount;
110 mFrameCountChanged = true;
111 }
112
checkFrameCountChange()113 bool EffectBufferHalHidl::checkFrameCountChange() {
114 bool result = mFrameCountChanged;
115 mFrameCountChanged = false;
116 return result;
117 }
118
setExternalData(void * external)119 void EffectBufferHalHidl::setExternalData(void* external) {
120 mExternalData = external;
121 }
122
update()123 void EffectBufferHalHidl::update() {
124 update(mBufferSize);
125 }
126
commit()127 void EffectBufferHalHidl::commit() {
128 commit(mBufferSize);
129 }
130
update(size_t size)131 void EffectBufferHalHidl::update(size_t size) {
132 if (mExternalData == nullptr) return;
133 mMemory->update();
134 if (size > mBufferSize) size = mBufferSize;
135 memcpy(mAudioBuffer.raw, mExternalData, size);
136 mMemory->commit();
137 }
138
commit(size_t size)139 void EffectBufferHalHidl::commit(size_t size) {
140 if (mExternalData == nullptr) return;
141 if (size > mBufferSize) size = mBufferSize;
142 memcpy(mExternalData, mAudioBuffer.raw, size);
143 }
144
145 } // namespace V4_0
146 } // namespace android
147