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/*
* Copyright (C) 2017 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#define LOG_TAG "AHardwareBuffer"
#include <vndk/hardware_buffer.h>
#include <errno.h>
#include <sys/socket.h>
#include <memory>
#include <cutils/native_handle.h>
#include <log/log.h>
#include <utils/StrongPointer.h>
#include <ui/GraphicBuffer.h>
#include <system/graphics.h>
#include <hardware/gralloc1.h>
#include <grallocusage/GrallocUsageConversion.h>
#include <private/android/AHardwareBufferHelpers.h>
static constexpr int kFdBufferSize = 128 * sizeof(int); // 128 ints
using namespace android;
// ----------------------------------------------------------------------------
// Public functions
// ----------------------------------------------------------------------------
int AHardwareBuffer_allocate(const AHardwareBuffer_Desc* desc, AHardwareBuffer** outBuffer) {
if (!outBuffer || !desc)
return BAD_VALUE;
int format = AHardwareBuffer_convertToPixelFormat(desc->format);
if (format == 0) {
ALOGE("Invalid pixel format %u", desc->format);
return BAD_VALUE;
}
if (desc->format == AHARDWAREBUFFER_FORMAT_BLOB && desc->height != 1) {
ALOGE("Height must be 1 when using the AHARDWAREBUFFER_FORMAT_BLOB format");
return BAD_VALUE;
}
uint64_t producerUsage = 0;
uint64_t consumerUsage = 0;
AHardwareBuffer_convertToGrallocUsageBits(&producerUsage, &consumerUsage, desc->usage0,
desc->usage1);
sp<GraphicBuffer> gbuffer(new GraphicBuffer(
desc->width, desc->height, format, desc->layers, producerUsage, consumerUsage,
std::string("AHardwareBuffer pid [") + std::to_string(getpid()) + "]"));
status_t err = gbuffer->initCheck();
if (err != 0 || gbuffer->handle == 0) {
if (err == NO_MEMORY) {
GraphicBuffer::dumpAllocationsToSystemLog();
}
ALOGE("GraphicBuffer(w=%u, h=%u, lc=%u) failed (%s), handle=%p",
desc->width, desc->height, desc->layers, strerror(-err), gbuffer->handle);
return err;
}
*outBuffer = AHardwareBuffer_from_GraphicBuffer(gbuffer.get());
// Ensure the buffer doesn't get destroyed when the sp<> goes away.
AHardwareBuffer_acquire(*outBuffer);
return NO_ERROR;
}
void AHardwareBuffer_acquire(AHardwareBuffer* buffer) {
// incStrong/decStrong token must be the same, doesn't matter what it is
AHardwareBuffer_to_GraphicBuffer(buffer)->incStrong((void*)AHardwareBuffer_acquire);
}
void AHardwareBuffer_release(AHardwareBuffer* buffer) {
// incStrong/decStrong token must be the same, doesn't matter what it is
AHardwareBuffer_to_GraphicBuffer(buffer)->decStrong((void*)AHardwareBuffer_acquire);
}
void AHardwareBuffer_describe(const AHardwareBuffer* buffer,
AHardwareBuffer_Desc* outDesc) {
if (!buffer || !outDesc) return;
const GraphicBuffer* gbuffer = AHardwareBuffer_to_GraphicBuffer(buffer);
outDesc->width = gbuffer->getWidth();
outDesc->height = gbuffer->getHeight();
outDesc->layers = gbuffer->getLayerCount();
uint64_t producerUsage = 0;
uint64_t consumerUsage = 0;
android_convertGralloc0To1Usage(gbuffer->getUsage(), &producerUsage, &consumerUsage);
AHardwareBuffer_convertFromGrallocUsageBits(&outDesc->usage0, &outDesc->usage1,
producerUsage, consumerUsage);
outDesc->format = AHardwareBuffer_convertFromPixelFormat(
static_cast<uint32_t>(gbuffer->getPixelFormat()));
}
int AHardwareBuffer_lock(AHardwareBuffer* buffer, uint64_t usage0,
int32_t fence, const ARect* rect, void** outVirtualAddress) {
if (!buffer) return BAD_VALUE;
if (usage0 & ~(AHARDWAREBUFFER_USAGE0_CPU_READ_OFTEN |
AHARDWAREBUFFER_USAGE0_CPU_WRITE_OFTEN)) {
ALOGE("Invalid usage flags passed to AHardwareBuffer_lock; only "
" AHARDWAREBUFFER_USAGE0_CPU_* flags are allowed");
return BAD_VALUE;
}
uint64_t producerUsage = 0;
uint64_t consumerUsage = 0;
AHardwareBuffer_convertToGrallocUsageBits(&producerUsage, &consumerUsage, usage0, 0);
GraphicBuffer* gBuffer = AHardwareBuffer_to_GraphicBuffer(buffer);
Rect bounds;
if (!rect) {
bounds.set(Rect(gBuffer->getWidth(), gBuffer->getHeight()));
} else {
bounds.set(Rect(rect->left, rect->top, rect->right, rect->bottom));
}
return gBuffer->lockAsync(producerUsage, consumerUsage, bounds,
outVirtualAddress, fence);
}
int AHardwareBuffer_unlock(AHardwareBuffer* buffer, int32_t* fence) {
if (!buffer) return BAD_VALUE;
GraphicBuffer* gBuffer = AHardwareBuffer_to_GraphicBuffer(buffer);
return gBuffer->unlockAsync(fence);
}
int AHardwareBuffer_sendHandleToUnixSocket(const AHardwareBuffer* buffer, int socketFd) {
if (!buffer) return BAD_VALUE;
const GraphicBuffer* gBuffer = AHardwareBuffer_to_GraphicBuffer(buffer);
size_t flattenedSize = gBuffer->getFlattenedSize();
size_t fdCount = gBuffer->getFdCount();
std::unique_ptr<uint8_t[]> data(new uint8_t[flattenedSize]);
std::unique_ptr<int[]> fds(new int[fdCount]);
// Make copies of needed items since flatten modifies them, and we don't
// want to send anything if there's an error during flatten.
size_t flattenedSizeCopy = flattenedSize;
size_t fdCountCopy = fdCount;
void* dataStart = data.get();
int* fdsStart = fds.get();
status_t err = gBuffer->flatten(dataStart, flattenedSizeCopy, fdsStart,
fdCountCopy);
if (err != NO_ERROR) {
return err;
}
struct iovec iov[1];
iov[0].iov_base = data.get();
iov[0].iov_len = flattenedSize;
char buf[CMSG_SPACE(kFdBufferSize)];
struct msghdr msg = {
.msg_control = buf,
.msg_controllen = sizeof(buf),
.msg_iov = &iov[0],
.msg_iovlen = 1,
};
struct cmsghdr* cmsg = CMSG_FIRSTHDR(&msg);
cmsg->cmsg_level = SOL_SOCKET;
cmsg->cmsg_type = SCM_RIGHTS;
cmsg->cmsg_len = CMSG_LEN(sizeof(int) * fdCount);
int* fdData = reinterpret_cast<int*>(CMSG_DATA(cmsg));
memcpy(fdData, fds.get(), sizeof(int) * fdCount);
msg.msg_controllen = cmsg->cmsg_len;
int result = sendmsg(socketFd, &msg, 0);
if (result <= 0) {
ALOGE("Error writing AHardwareBuffer to socket: error %#x (%s)",
result, strerror(errno));
return result;
}
return NO_ERROR;
}
int AHardwareBuffer_recvHandleFromUnixSocket(int socketFd, AHardwareBuffer** outBuffer) {
if (!outBuffer) return BAD_VALUE;
static constexpr int kMessageBufferSize = 4096 * sizeof(int);
std::unique_ptr<char[]> dataBuf(new char[kMessageBufferSize]);
char fdBuf[CMSG_SPACE(kFdBufferSize)];
struct iovec iov[1];
iov[0].iov_base = dataBuf.get();
iov[0].iov_len = kMessageBufferSize;
struct msghdr msg = {
.msg_control = fdBuf,
.msg_controllen = sizeof(fdBuf),
.msg_iov = &iov[0],
.msg_iovlen = 1,
};
int result = recvmsg(socketFd, &msg, 0);
if (result <= 0) {
ALOGE("Error reading AHardwareBuffer from socket: error %#x (%s)",
result, strerror(errno));
return result;
}
if (msg.msg_iovlen != 1) {
ALOGE("Error reading AHardwareBuffer from socket: bad data length");
return INVALID_OPERATION;
}
if (msg.msg_controllen % sizeof(int) != 0) {
ALOGE("Error reading AHardwareBuffer from socket: bad fd length");
return INVALID_OPERATION;
}
size_t dataLen = msg.msg_iov[0].iov_len;
const void* data = static_cast<const void*>(msg.msg_iov[0].iov_base);
if (!data) {
ALOGE("Error reading AHardwareBuffer from socket: no buffer data");
return INVALID_OPERATION;
}
struct cmsghdr* cmsg = CMSG_FIRSTHDR(&msg);
if (!cmsg) {
ALOGE("Error reading AHardwareBuffer from socket: no fd header");
return INVALID_OPERATION;
}
size_t fdCount = msg.msg_controllen >> 2;
const int* fdData = reinterpret_cast<const int*>(CMSG_DATA(cmsg));
if (!fdData) {
ALOGE("Error reading AHardwareBuffer from socket: no fd data");
return INVALID_OPERATION;
}
GraphicBuffer* gBuffer = new GraphicBuffer();
status_t err = gBuffer->unflatten(data, dataLen, fdData, fdCount);
if (err != NO_ERROR) {
return err;
}
*outBuffer = AHardwareBuffer_from_GraphicBuffer(gBuffer);
// Ensure the buffer has a positive ref-count.
AHardwareBuffer_acquire(*outBuffer);
return NO_ERROR;
}
// ----------------------------------------------------------------------------
// VNDK functions
// ----------------------------------------------------------------------------
const native_handle_t* AHardwareBuffer_getNativeHandle(
const AHardwareBuffer* buffer) {
if (!buffer) return nullptr;
const GraphicBuffer* gbuffer = AHardwareBuffer_to_GraphicBuffer(buffer);
return gbuffer->handle;
}
// ----------------------------------------------------------------------------
// Helpers implementation
// ----------------------------------------------------------------------------
namespace android {
// A 1:1 mapping of AHardwaqreBuffer bitmasks to gralloc1 bitmasks.
struct UsageMaskMapping {
uint64_t hardwareBufferMask;
uint64_t grallocMask;
};
static constexpr UsageMaskMapping kUsage0ProducerMapping[] = {
{ AHARDWAREBUFFER_USAGE0_CPU_WRITE, GRALLOC1_PRODUCER_USAGE_CPU_WRITE },
{ AHARDWAREBUFFER_USAGE0_CPU_WRITE_OFTEN, GRALLOC1_PRODUCER_USAGE_CPU_WRITE_OFTEN },
{ AHARDWAREBUFFER_USAGE0_GPU_COLOR_OUTPUT, GRALLOC1_PRODUCER_USAGE_GPU_RENDER_TARGET },
{ AHARDWAREBUFFER_USAGE0_PROTECTED_CONTENT, GRALLOC1_PRODUCER_USAGE_PROTECTED },
{ AHARDWAREBUFFER_USAGE0_SENSOR_DIRECT_DATA, GRALLOC1_PRODUCER_USAGE_SENSOR_DIRECT_DATA },
};
static constexpr UsageMaskMapping kUsage1ProducerMapping[] = {
{ AHARDWAREBUFFER_USAGE1_PRODUCER_PRIVATE_0, GRALLOC1_PRODUCER_USAGE_PRIVATE_0 },
{ AHARDWAREBUFFER_USAGE1_PRODUCER_PRIVATE_1, GRALLOC1_PRODUCER_USAGE_PRIVATE_1 },
{ AHARDWAREBUFFER_USAGE1_PRODUCER_PRIVATE_2, GRALLOC1_PRODUCER_USAGE_PRIVATE_2 },
{ AHARDWAREBUFFER_USAGE1_PRODUCER_PRIVATE_3, GRALLOC1_PRODUCER_USAGE_PRIVATE_3 },
{ AHARDWAREBUFFER_USAGE1_PRODUCER_PRIVATE_4, GRALLOC1_PRODUCER_USAGE_PRIVATE_4 },
{ AHARDWAREBUFFER_USAGE1_PRODUCER_PRIVATE_5, GRALLOC1_PRODUCER_USAGE_PRIVATE_5 },
{ AHARDWAREBUFFER_USAGE1_PRODUCER_PRIVATE_6, GRALLOC1_PRODUCER_USAGE_PRIVATE_6 },
{ AHARDWAREBUFFER_USAGE1_PRODUCER_PRIVATE_7, GRALLOC1_PRODUCER_USAGE_PRIVATE_7 },
{ AHARDWAREBUFFER_USAGE1_PRODUCER_PRIVATE_8, GRALLOC1_PRODUCER_USAGE_PRIVATE_8 },
{ AHARDWAREBUFFER_USAGE1_PRODUCER_PRIVATE_9, GRALLOC1_PRODUCER_USAGE_PRIVATE_9 },
{ AHARDWAREBUFFER_USAGE1_PRODUCER_PRIVATE_10, GRALLOC1_PRODUCER_USAGE_PRIVATE_10 },
{ AHARDWAREBUFFER_USAGE1_PRODUCER_PRIVATE_11, GRALLOC1_PRODUCER_USAGE_PRIVATE_11 },
{ AHARDWAREBUFFER_USAGE1_PRODUCER_PRIVATE_12, GRALLOC1_PRODUCER_USAGE_PRIVATE_12 },
{ AHARDWAREBUFFER_USAGE1_PRODUCER_PRIVATE_13, GRALLOC1_PRODUCER_USAGE_PRIVATE_13 },
{ AHARDWAREBUFFER_USAGE1_PRODUCER_PRIVATE_14, GRALLOC1_PRODUCER_USAGE_PRIVATE_14 },
{ AHARDWAREBUFFER_USAGE1_PRODUCER_PRIVATE_15, GRALLOC1_PRODUCER_USAGE_PRIVATE_15 },
{ AHARDWAREBUFFER_USAGE1_PRODUCER_PRIVATE_16, GRALLOC1_PRODUCER_USAGE_PRIVATE_16 },
{ AHARDWAREBUFFER_USAGE1_PRODUCER_PRIVATE_17, GRALLOC1_PRODUCER_USAGE_PRIVATE_17 },
{ AHARDWAREBUFFER_USAGE1_PRODUCER_PRIVATE_18, GRALLOC1_PRODUCER_USAGE_PRIVATE_18 },
{ AHARDWAREBUFFER_USAGE1_PRODUCER_PRIVATE_19, GRALLOC1_PRODUCER_USAGE_PRIVATE_19 },
};
static constexpr UsageMaskMapping kUsage0ConsumerMapping[] = {
{ AHARDWAREBUFFER_USAGE0_CPU_READ, GRALLOC1_CONSUMER_USAGE_CPU_READ },
{ AHARDWAREBUFFER_USAGE0_CPU_READ_OFTEN, GRALLOC1_CONSUMER_USAGE_CPU_READ_OFTEN },
{ AHARDWAREBUFFER_USAGE0_GPU_SAMPLED_IMAGE, GRALLOC1_CONSUMER_USAGE_GPU_TEXTURE },
{ AHARDWAREBUFFER_USAGE0_GPU_DATA_BUFFER, GRALLOC1_CONSUMER_USAGE_GPU_DATA_BUFFER },
{ AHARDWAREBUFFER_USAGE0_VIDEO_ENCODE, GRALLOC1_CONSUMER_USAGE_VIDEO_ENCODER },
};
static constexpr UsageMaskMapping kUsage1ConsumerMapping[] = {
{ AHARDWAREBUFFER_USAGE1_CONSUMER_PRIVATE_0, GRALLOC1_CONSUMER_USAGE_PRIVATE_0 },
{ AHARDWAREBUFFER_USAGE1_CONSUMER_PRIVATE_1, GRALLOC1_CONSUMER_USAGE_PRIVATE_1 },
{ AHARDWAREBUFFER_USAGE1_CONSUMER_PRIVATE_2, GRALLOC1_CONSUMER_USAGE_PRIVATE_2 },
{ AHARDWAREBUFFER_USAGE1_CONSUMER_PRIVATE_3, GRALLOC1_CONSUMER_USAGE_PRIVATE_3 },
{ AHARDWAREBUFFER_USAGE1_CONSUMER_PRIVATE_4, GRALLOC1_CONSUMER_USAGE_PRIVATE_4 },
{ AHARDWAREBUFFER_USAGE1_CONSUMER_PRIVATE_5, GRALLOC1_CONSUMER_USAGE_PRIVATE_5 },
{ AHARDWAREBUFFER_USAGE1_CONSUMER_PRIVATE_6, GRALLOC1_CONSUMER_USAGE_PRIVATE_6 },
{ AHARDWAREBUFFER_USAGE1_CONSUMER_PRIVATE_7, GRALLOC1_CONSUMER_USAGE_PRIVATE_7 },
{ AHARDWAREBUFFER_USAGE1_CONSUMER_PRIVATE_8, GRALLOC1_CONSUMER_USAGE_PRIVATE_8 },
{ AHARDWAREBUFFER_USAGE1_CONSUMER_PRIVATE_9, GRALLOC1_CONSUMER_USAGE_PRIVATE_9 },
{ AHARDWAREBUFFER_USAGE1_CONSUMER_PRIVATE_10, GRALLOC1_CONSUMER_USAGE_PRIVATE_10 },
{ AHARDWAREBUFFER_USAGE1_CONSUMER_PRIVATE_11, GRALLOC1_CONSUMER_USAGE_PRIVATE_11 },
{ AHARDWAREBUFFER_USAGE1_CONSUMER_PRIVATE_12, GRALLOC1_CONSUMER_USAGE_PRIVATE_12 },
{ AHARDWAREBUFFER_USAGE1_CONSUMER_PRIVATE_13, GRALLOC1_CONSUMER_USAGE_PRIVATE_13 },
{ AHARDWAREBUFFER_USAGE1_CONSUMER_PRIVATE_14, GRALLOC1_CONSUMER_USAGE_PRIVATE_14 },
{ AHARDWAREBUFFER_USAGE1_CONSUMER_PRIVATE_15, GRALLOC1_CONSUMER_USAGE_PRIVATE_15 },
{ AHARDWAREBUFFER_USAGE1_CONSUMER_PRIVATE_16, GRALLOC1_CONSUMER_USAGE_PRIVATE_16 },
{ AHARDWAREBUFFER_USAGE1_CONSUMER_PRIVATE_17, GRALLOC1_CONSUMER_USAGE_PRIVATE_17 },
{ AHARDWAREBUFFER_USAGE1_CONSUMER_PRIVATE_18, GRALLOC1_CONSUMER_USAGE_PRIVATE_18 },
{ AHARDWAREBUFFER_USAGE1_CONSUMER_PRIVATE_19, GRALLOC1_CONSUMER_USAGE_PRIVATE_19 },
};
static inline bool containsBits(uint64_t mask, uint64_t bitsToCheck) {
return (mask & bitsToCheck) == bitsToCheck && bitsToCheck;
}
uint32_t AHardwareBuffer_convertFromPixelFormat(uint32_t format) {
switch (format) {
case HAL_PIXEL_FORMAT_RGBA_8888: return AHARDWAREBUFFER_FORMAT_R8G8B8A8_UNORM;
case HAL_PIXEL_FORMAT_RGBX_8888: return AHARDWAREBUFFER_FORMAT_R8G8B8X8_UNORM;
case HAL_PIXEL_FORMAT_RGB_565: return AHARDWAREBUFFER_FORMAT_R5G6B5_UNORM;
case HAL_PIXEL_FORMAT_RGB_888: return AHARDWAREBUFFER_FORMAT_R8G8B8_UNORM;
case HAL_PIXEL_FORMAT_RGBA_FP16: return AHARDWAREBUFFER_FORMAT_R16G16B16A16_SFLOAT;
case HAL_PIXEL_FORMAT_RGBA_1010102: return AHARDWAREBUFFER_FORMAT_A2R10G10B10_UNORM_PACK32;
case HAL_PIXEL_FORMAT_BLOB: return AHARDWAREBUFFER_FORMAT_BLOB;
default:ALOGE("Unknown pixel format %u", format);
return 0;
}
}
uint32_t AHardwareBuffer_convertToPixelFormat(uint32_t format) {
switch (format) {
case AHARDWAREBUFFER_FORMAT_R8G8B8A8_UNORM: return HAL_PIXEL_FORMAT_RGBA_8888;
case AHARDWAREBUFFER_FORMAT_R8G8B8X8_UNORM: return HAL_PIXEL_FORMAT_RGBX_8888;
case AHARDWAREBUFFER_FORMAT_R5G6B5_UNORM: return HAL_PIXEL_FORMAT_RGB_565;
case AHARDWAREBUFFER_FORMAT_R8G8B8_UNORM: return HAL_PIXEL_FORMAT_RGB_888;
case AHARDWAREBUFFER_FORMAT_R16G16B16A16_SFLOAT: return HAL_PIXEL_FORMAT_RGBA_FP16;
case AHARDWAREBUFFER_FORMAT_A2R10G10B10_UNORM_PACK32: return HAL_PIXEL_FORMAT_RGBA_1010102;
case AHARDWAREBUFFER_FORMAT_BLOB: return HAL_PIXEL_FORMAT_BLOB;
default:ALOGE("Unknown AHardwareBuffer format %u", format);
return 0;
}
}
void AHardwareBuffer_convertToGrallocUsageBits(uint64_t* outProducerUsage,
uint64_t* outConsumerUsage, uint64_t usage0, uint64_t usage1) {
*outProducerUsage = 0;
*outConsumerUsage = 0;
for (const UsageMaskMapping& mapping : kUsage0ProducerMapping) {
if (containsBits(usage0, mapping.hardwareBufferMask)) {
*outProducerUsage |= mapping.grallocMask;
}
}
for (const UsageMaskMapping& mapping : kUsage1ProducerMapping) {
if (containsBits(usage1, mapping.hardwareBufferMask)) {
*outProducerUsage |= mapping.grallocMask;
}
}
for (const UsageMaskMapping& mapping : kUsage0ConsumerMapping) {
if (containsBits(usage0, mapping.hardwareBufferMask)) {
*outConsumerUsage |= mapping.grallocMask;
}
}
for (const UsageMaskMapping& mapping : kUsage1ConsumerMapping) {
if (containsBits(usage1, mapping.hardwareBufferMask)) {
*outConsumerUsage |= mapping.grallocMask;
}
}
}
void AHardwareBuffer_convertFromGrallocUsageBits(uint64_t* outUsage0, uint64_t* outUsage1,
uint64_t producerUsage, uint64_t consumerUsage) {
*outUsage0 = 0;
*outUsage1 = 0;
for (const UsageMaskMapping& mapping : kUsage0ProducerMapping) {
if (containsBits(producerUsage, mapping.grallocMask)) {
*outUsage0 |= mapping.hardwareBufferMask;
}
}
for (const UsageMaskMapping& mapping : kUsage1ProducerMapping) {
if (containsBits(producerUsage, mapping.grallocMask)) {
*outUsage1 |= mapping.hardwareBufferMask;
}
}
for (const UsageMaskMapping& mapping : kUsage0ConsumerMapping) {
if (containsBits(consumerUsage, mapping.grallocMask)) {
*outUsage0 |= mapping.hardwareBufferMask;
}
}
for (const UsageMaskMapping& mapping : kUsage1ConsumerMapping) {
if (containsBits(consumerUsage, mapping.grallocMask)) {
*outUsage1 |= mapping.hardwareBufferMask;
}
}
}
const GraphicBuffer* AHardwareBuffer_to_GraphicBuffer(const AHardwareBuffer* buffer) {
return reinterpret_cast<const GraphicBuffer*>(buffer);
}
GraphicBuffer* AHardwareBuffer_to_GraphicBuffer(AHardwareBuffer* buffer) {
return reinterpret_cast<GraphicBuffer*>(buffer);
}
const ANativeWindowBuffer* AHardwareBuffer_to_ANativeWindowBuffer(const AHardwareBuffer* buffer) {
return AHardwareBuffer_to_GraphicBuffer(buffer)->getNativeBuffer();
}
ANativeWindowBuffer* AHardwareBuffer_to_ANativeWindowBuffer(AHardwareBuffer* buffer) {
return AHardwareBuffer_to_GraphicBuffer(buffer)->getNativeBuffer();
}
AHardwareBuffer* AHardwareBuffer_from_GraphicBuffer(GraphicBuffer* buffer) {
return reinterpret_cast<AHardwareBuffer*>(buffer);
}
} // namespace android
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