diff options
Diffstat (limited to 'src/android/mm/cros_frame_buffer_allocator.cpp')
-rw-r--r-- | src/android/mm/cros_frame_buffer_allocator.cpp | 88 |
1 files changed, 88 insertions, 0 deletions
diff --git a/src/android/mm/cros_frame_buffer_allocator.cpp b/src/android/mm/cros_frame_buffer_allocator.cpp new file mode 100644 index 00000000..52e8c180 --- /dev/null +++ b/src/android/mm/cros_frame_buffer_allocator.cpp @@ -0,0 +1,88 @@ +/* SPDX-License-Identifier: LGPL-2.1-or-later */ +/* + * Copyright (C) 2021, Google Inc. + * + * cros_frame_buffer.cpp - Allocate FrameBuffer for Chromium OS using + * CameraBufferManager + */ + +#include <memory> +#include <vector> + +#include <libcamera/base/log.h> +#include <libcamera/base/shared_fd.h> + +#include "libcamera/internal/framebuffer.h" + +#include "../camera_device.h" +#include "../frame_buffer_allocator.h" +#include "cros-camera/camera_buffer_manager.h" + +using namespace libcamera; + +LOG_DECLARE_CATEGORY(HAL) + +namespace { +class CrosFrameBufferData : public FrameBuffer::Private +{ + LIBCAMERA_DECLARE_PUBLIC(FrameBuffer) + +public: + CrosFrameBufferData(cros::ScopedBufferHandle scopedHandle) + : FrameBuffer::Private(), scopedHandle_(std::move(scopedHandle)) + { + } + +private: + cros::ScopedBufferHandle scopedHandle_; +}; +} /* namespace */ + +class PlatformFrameBufferAllocator::Private : public Extensible::Private +{ + LIBCAMERA_DECLARE_PUBLIC(PlatformFrameBufferAllocator) + +public: + Private([[maybe_unused]] CameraDevice *const cameraDevice) + { + } + + std::unique_ptr<libcamera::FrameBuffer> + allocate(int halPixelFormat, const libcamera::Size &size, uint32_t usage); +}; + +std::unique_ptr<libcamera::FrameBuffer> +PlatformFrameBufferAllocator::Private::allocate(int halPixelFormat, + const libcamera::Size &size, + uint32_t usage) +{ + cros::ScopedBufferHandle scopedHandle = + cros::CameraBufferManager::AllocateScopedBuffer( + size.width, size.height, halPixelFormat, usage); + if (!scopedHandle) { + LOG(HAL, Error) << "Failed to allocate buffer handle"; + return nullptr; + } + + buffer_handle_t handle = *scopedHandle; + SharedFD fd{ handle->data[0] }; + if (!fd.isValid()) { + LOG(HAL, Fatal) << "Invalid fd"; + return nullptr; + } + + /* This code assumes all the planes are located in the same buffer. */ + const size_t numPlanes = cros::CameraBufferManager::GetNumPlanes(handle); + std::vector<FrameBuffer::Plane> planes(numPlanes); + for (auto [i, plane] : utils::enumerate(planes)) { + plane.fd = fd; + plane.offset = cros::CameraBufferManager::GetPlaneOffset(handle, i); + plane.length = cros::CameraBufferManager::GetPlaneSize(handle, i); + } + + return std::make_unique<FrameBuffer>( + std::make_unique<CrosFrameBufferData>(std::move(scopedHandle)), + planes); +} + +PUBLIC_FRAME_BUFFER_ALLOCATOR_IMPLEMENTATION |