1 /*
2 * Copyright 2016 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 #define LOG_TAG "AAudio"
18 //#define LOG_NDEBUG 0
19 #include <utils/Log.h>
20
21 #include <stdint.h>
22
23 #include <sys/mman.h>
24 #include <binder/Parcelable.h>
25
26 #include <aaudio/AAudio.h>
27
28 #include "binding/SharedMemoryParcelable.h"
29 #include "binding/SharedRegionParcelable.h"
30
31 using android::NO_ERROR;
32 using android::status_t;
33 using android::Parcel;
34 using android::Parcelable;
35
36 using namespace aaudio;
37
SharedRegionParcelable()38 SharedRegionParcelable::SharedRegionParcelable() {}
~SharedRegionParcelable()39 SharedRegionParcelable::~SharedRegionParcelable() {}
40
setup(int32_t sharedMemoryIndex,int32_t offsetInBytes,int32_t sizeInBytes)41 void SharedRegionParcelable::setup(int32_t sharedMemoryIndex,
42 int32_t offsetInBytes,
43 int32_t sizeInBytes) {
44 mSharedMemoryIndex = sharedMemoryIndex;
45 mOffsetInBytes = offsetInBytes;
46 mSizeInBytes = sizeInBytes;
47 }
48
writeToParcel(Parcel * parcel) const49 status_t SharedRegionParcelable::writeToParcel(Parcel* parcel) const {
50 parcel->writeInt32(mSizeInBytes);
51 if (mSizeInBytes > 0) {
52 parcel->writeInt32(mSharedMemoryIndex);
53 parcel->writeInt32(mOffsetInBytes);
54 }
55 return NO_ERROR; // TODO check for errors above
56 }
57
readFromParcel(const Parcel * parcel)58 status_t SharedRegionParcelable::readFromParcel(const Parcel* parcel) {
59 parcel->readInt32(&mSizeInBytes);
60 if (mSizeInBytes > 0) {
61 parcel->readInt32(&mSharedMemoryIndex);
62 parcel->readInt32(&mOffsetInBytes);
63 }
64 return NO_ERROR; // TODO check for errors above
65 }
66
resolve(SharedMemoryParcelable * memoryParcels,void ** regionAddressPtr)67 aaudio_result_t SharedRegionParcelable::resolve(SharedMemoryParcelable *memoryParcels,
68 void **regionAddressPtr) {
69 if (mSizeInBytes == 0) {
70 *regionAddressPtr = nullptr;
71 return AAUDIO_OK;
72 }
73 if (mSharedMemoryIndex < 0) {
74 ALOGE("SharedRegionParcelable invalid mSharedMemoryIndex = %d", mSharedMemoryIndex);
75 return AAUDIO_ERROR_INTERNAL;
76 }
77 SharedMemoryParcelable *memoryParcel = &memoryParcels[mSharedMemoryIndex];
78 return memoryParcel->resolve(mOffsetInBytes, mSizeInBytes, regionAddressPtr);
79 }
80
validate()81 aaudio_result_t SharedRegionParcelable::validate() {
82 if (mSizeInBytes < 0 || mSizeInBytes >= MAX_MMAP_SIZE_BYTES) {
83 ALOGE("SharedRegionParcelable invalid mSizeInBytes = %d", mSizeInBytes);
84 return AAUDIO_ERROR_OUT_OF_RANGE;
85 }
86 if (mSizeInBytes > 0) {
87 if (mOffsetInBytes < 0 || mOffsetInBytes >= MAX_MMAP_OFFSET_BYTES) {
88 ALOGE("SharedRegionParcelable invalid mOffsetInBytes = %d", mOffsetInBytes);
89 return AAUDIO_ERROR_OUT_OF_RANGE;
90 }
91 if (mSharedMemoryIndex < 0 || mSharedMemoryIndex >= MAX_SHARED_MEMORIES) {
92 ALOGE("SharedRegionParcelable invalid mSharedMemoryIndex = %d", mSharedMemoryIndex);
93 return AAUDIO_ERROR_INTERNAL;
94 }
95 }
96 return AAUDIO_OK;
97 }
98
dump()99 void SharedRegionParcelable::dump() {
100 ALOGD("SharedRegionParcelable mSizeInBytes = %d -----", mSizeInBytes);
101 if (mSizeInBytes > 0) {
102 ALOGD("SharedRegionParcelable mSharedMemoryIndex = %d", mSharedMemoryIndex);
103 ALOGD("SharedRegionParcelable mOffsetInBytes = %d", mOffsetInBytes);
104 }
105 }
106