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/*
* Copyright (C) 2023 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_NDEBUG 0
#define LOG_TAG "VirtualCameraStream"
#include "VirtualCameraStream.h"
#include <cstdint>
#include <memory>
#include <mutex>
#include <tuple>
#include <utility>
#include "EGL/egl.h"
#include "aidl/android/hardware/camera/device/Stream.h"
#include "aidl/android/hardware/camera/device/StreamBuffer.h"
#include "aidl/android/hardware/graphics/common/PixelFormat.h"
#include "aidlcommonsupport/NativeHandle.h"
#include "android/hardware_buffer.h"
#include "cutils/native_handle.h"
#include "ui/GraphicBuffer.h"
#include "ui/GraphicBufferMapper.h"
namespace android {
namespace companion {
namespace virtualcamera {
using ::aidl::android::hardware::camera::device::Stream;
using ::aidl::android::hardware::camera::device::StreamBuffer;
using ::aidl::android::hardware::common::NativeHandle;
using ::aidl::android::hardware::graphics::common::PixelFormat;
namespace {
sp<GraphicBuffer> createBlobGraphicBuffer(GraphicBufferMapper& mapper,
buffer_handle_t bufferHandle) {
uint64_t allocationSize;
uint64_t usage;
uint64_t layerCount;
if (mapper.getAllocationSize(bufferHandle, &allocationSize) != NO_ERROR ||
mapper.getUsage(bufferHandle, &usage) != NO_ERROR ||
mapper.getLayerCount(bufferHandle, &layerCount) != NO_ERROR) {
ALOGE("Error fetching metadata for the imported BLOB buffer handle.");
return nullptr;
}
return sp<GraphicBuffer>::make(
bufferHandle, GraphicBuffer::HandleWrapMethod::TAKE_HANDLE,
allocationSize, /*height=*/1, static_cast<int>(ui::PixelFormat::BLOB),
layerCount, usage, 0);
}
sp<GraphicBuffer> createYCbCr420GraphicBuffer(GraphicBufferMapper& mapper,
buffer_handle_t bufferHandle) {
uint64_t width;
uint64_t height;
uint64_t usage;
uint64_t layerCount;
if (mapper.getWidth(bufferHandle, &width) != NO_ERROR ||
mapper.getHeight(bufferHandle, &height) != NO_ERROR ||
mapper.getUsage(bufferHandle, &usage) != NO_ERROR ||
mapper.getLayerCount(bufferHandle, &layerCount) != NO_ERROR) {
ALOGE("Error fetching metadata for the imported YCbCr420 buffer handle.");
return nullptr;
}
return sp<GraphicBuffer>::make(
bufferHandle, GraphicBuffer::HandleWrapMethod::TAKE_HANDLE, width, height,
static_cast<int>(ui::PixelFormat::YCBCR_420_888), /*layers=*/1, usage,
width);
}
std::shared_ptr<AHardwareBuffer> importBufferInternal(
const NativeHandle& aidlHandle, const Stream& streamConfig) {
if (aidlHandle.fds.empty()) {
ALOGE("Empty handle - nothing to import");
return nullptr;
}
std::unique_ptr<native_handle_t, int (*)(native_handle_t*)> nativeHandle(
::android::makeFromAidl(aidlHandle), native_handle_delete);
GraphicBufferMapper& mapper = GraphicBufferMapper::get();
buffer_handle_t bufferHandle;
// Use importBufferNoValidate to rely on ground-truth metadata passed along
// the buffer.
int ret = mapper.importBufferNoValidate(nativeHandle.get(), &bufferHandle);
if (ret != NO_ERROR) {
ALOGE("Failed to import buffer handle: %d", ret);
return nullptr;
}
sp<GraphicBuffer> buf =
streamConfig.format == PixelFormat::BLOB
? createBlobGraphicBuffer(mapper, bufferHandle)
: createYCbCr420GraphicBuffer(mapper, bufferHandle);
if (buf->initCheck() != NO_ERROR) {
ALOGE("Imported graphic buffer is not correcly initialized.");
return nullptr;
}
AHardwareBuffer* rawPtr = buf->toAHardwareBuffer();
AHardwareBuffer_acquire(rawPtr);
return std::shared_ptr<AHardwareBuffer>(buf->toAHardwareBuffer(),
AHardwareBuffer_release);
}
} // namespace
VirtualCameraStream::VirtualCameraStream(const Stream& stream)
: mStreamConfig(stream) {
}
std::shared_ptr<AHardwareBuffer> VirtualCameraStream::importBuffer(
const ::aidl::android::hardware::camera::device::StreamBuffer& buffer) {
auto hwBufferPtr = importBufferInternal(buffer.buffer, mStreamConfig);
if (hwBufferPtr != nullptr) {
std::lock_guard<std::mutex> lock(mLock);
mBuffers.emplace(std::piecewise_construct,
std::forward_as_tuple(buffer.bufferId),
std::forward_as_tuple(hwBufferPtr));
}
return hwBufferPtr;
}
std::shared_ptr<AHardwareBuffer> VirtualCameraStream::getHardwareBuffer(
const int bufferId) {
std::lock_guard<std::mutex> lock(mLock);
return getHardwareBufferLocked(bufferId);
}
std::shared_ptr<EglFrameBuffer> VirtualCameraStream::getEglFrameBuffer(
const EGLDisplay eglDisplay, const int bufferId) {
const FramebufferMapKey key(bufferId, eglDisplay);
std::lock_guard<std::mutex> lock(mLock);
auto it = mEglFramebuffers.find(key);
if (it != mEglFramebuffers.end()) {
return it->second;
}
std::shared_ptr<AHardwareBuffer> hwBufferPtr =
getHardwareBufferLocked(bufferId);
if (hwBufferPtr == nullptr) {
return nullptr;
}
std::shared_ptr<EglFrameBuffer> framebufferPtr =
std::make_shared<EglFrameBuffer>(eglDisplay, hwBufferPtr);
mEglFramebuffers.emplace(std::piecewise_construct, std::forward_as_tuple(key),
std::forward_as_tuple(framebufferPtr));
return framebufferPtr;
}
std::shared_ptr<AHardwareBuffer> VirtualCameraStream::getHardwareBufferLocked(
const int bufferId) {
auto it = mBuffers.find(bufferId);
return it != mBuffers.end() ? it->second : nullptr;
}
bool VirtualCameraStream::removeBuffer(int bufferId) {
std::lock_guard<std::mutex> lock(mLock);
return mBuffers.erase(bufferId) == 1;
}
Stream VirtualCameraStream::getStreamConfig() const {
return mStreamConfig;
}
} // namespace virtualcamera
} // namespace companion
} // namespace android
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