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
29using ::android::hardware::Return;
30using ::android::hidl::allocator::V1_0::IAllocator;
31
32namespace android {
33
34// static
35uint64_t EffectBufferHalHidl::makeUniqueId() {
36    static std::atomic<uint64_t> counter{1};
37    return counter++;
38}
39
40// static
41status_t EffectBufferHalInterface::allocate(
42        size_t size, sp<EffectBufferHalInterface>* buffer) {
43    return mirror(nullptr, size, buffer);
44}
45
46// static
47status_t EffectBufferHalInterface::mirror(
48        void* external, size_t size, sp<EffectBufferHalInterface>* buffer) {
49    sp<EffectBufferHalInterface> tempBuffer = new EffectBufferHalHidl(size);
50    status_t result = static_cast<EffectBufferHalHidl*>(tempBuffer.get())->init();
51    if (result == OK) {
52        tempBuffer->setExternalData(external);
53        *buffer = tempBuffer;
54    }
55    return result;
56}
57
58EffectBufferHalHidl::EffectBufferHalHidl(size_t size)
59        : mBufferSize(size), mFrameCountChanged(false),
60          mExternalData(nullptr), mAudioBuffer{0, {nullptr}} {
61    mHidlBuffer.id = makeUniqueId();
62    mHidlBuffer.frameCount = 0;
63}
64
65EffectBufferHalHidl::~EffectBufferHalHidl() {
66}
67
68status_t EffectBufferHalHidl::init() {
69    sp<IAllocator> ashmem = IAllocator::getService("ashmem");
70    if (ashmem == 0) {
71        ALOGE("Failed to retrieve ashmem allocator service");
72        return NO_INIT;
73    }
74    status_t retval = NO_MEMORY;
75    Return<void> result = ashmem->allocate(
76            mBufferSize,
77            [&](bool success, const hidl_memory& memory) {
78                if (success) {
79                    mHidlBuffer.data = memory;
80                    retval = OK;
81                }
82            });
83    if (result.isOk() && retval == OK) {
84        mMemory = hardware::mapMemory(mHidlBuffer.data);
85        if (mMemory != 0) {
86            mMemory->update();
87            mAudioBuffer.raw = static_cast<void*>(mMemory->getPointer());
88            memset(mAudioBuffer.raw, 0, mMemory->getSize());
89            mMemory->commit();
90        } else {
91            ALOGE("Failed to map allocated ashmem");
92            retval = NO_MEMORY;
93        }
94    } else {
95        ALOGE("Failed to allocate %d bytes from ashmem", (int)mBufferSize);
96    }
97    return result.isOk() ? retval : FAILED_TRANSACTION;
98}
99
100audio_buffer_t* EffectBufferHalHidl::audioBuffer() {
101    return &mAudioBuffer;
102}
103
104void* EffectBufferHalHidl::externalData() const {
105    return mExternalData;
106}
107
108void EffectBufferHalHidl::setFrameCount(size_t frameCount) {
109    mHidlBuffer.frameCount = frameCount;
110    mAudioBuffer.frameCount = frameCount;
111    mFrameCountChanged = true;
112}
113
114bool EffectBufferHalHidl::checkFrameCountChange() {
115    bool result = mFrameCountChanged;
116    mFrameCountChanged = false;
117    return result;
118}
119
120void EffectBufferHalHidl::setExternalData(void* external) {
121    mExternalData = external;
122}
123
124void EffectBufferHalHidl::update() {
125    update(mBufferSize);
126}
127
128void EffectBufferHalHidl::commit() {
129    commit(mBufferSize);
130}
131
132void EffectBufferHalHidl::update(size_t size) {
133    if (mExternalData == nullptr) return;
134    mMemory->update();
135    if (size > mBufferSize) size = mBufferSize;
136    memcpy(mAudioBuffer.raw, mExternalData, size);
137    mMemory->commit();
138}
139
140void EffectBufferHalHidl::commit(size_t size) {
141    if (mExternalData == nullptr) return;
142    if (size > mBufferSize) size = mBufferSize;
143    memcpy(mExternalData, mAudioBuffer.raw, size);
144}
145
146} // namespace android
147