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// Copyright 2021 The Dawn Authors
//
// 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.
#include <fcntl.h>
#include <gbm.h>
#include <memory>
#include <string>
#include <utility>
#include <vector>
#include "VideoViewsTests.h"
#include "dawn/common/Assert.h"
#include "dawn/native/VulkanBackend.h"
namespace dawn {
namespace {
// "linux-chromeos-rel"'s gbm.h is too old to compile, missing this change at least:
// https://chromium-review.googlesource.com/c/chromiumos/platform/minigbm/+/1963001/10/gbm.h#244
#ifndef MINIGBM
#define GBM_BO_USE_TEXTURING (1 << 5)
#define GBM_BO_USE_SW_WRITE_RARELY (1 << 12)
#define GBM_BO_USE_HW_VIDEO_DECODER (1 << 13)
#endif
#ifndef DRM_FORMAT_MOD_LINEAR
#define DRM_FORMAT_MOD_LINEAR 0
#endif
class PlatformTextureGbm : public VideoViewsTestBackend::PlatformTexture {
public:
PlatformTextureGbm(wgpu::Texture&& texture, gbm_bo* gbmBo)
: PlatformTexture(std::move(texture)), mGbmBo(gbmBo) {}
~PlatformTextureGbm() override = default;
// TODO(chromium:1258986): Add DISJOINT vkImage support for multi-plannar formats.
bool CanWrapAsWGPUTexture() override {
ASSERT(mGbmBo != nullptr);
// Checks if all plane handles of a multi-planar gbm_bo are same.
gbm_bo_handle plane0Handle = gbm_bo_get_handle_for_plane(mGbmBo, 0);
for (int plane = 1; plane < gbm_bo_get_plane_count(mGbmBo); ++plane) {
if (gbm_bo_get_handle_for_plane(mGbmBo, plane).u32 != plane0Handle.u32) {
return false;
}
}
return true;
}
gbm_bo* GetGbmBo() { return mGbmBo; }
private:
gbm_bo* mGbmBo = nullptr;
};
class VideoViewsTestBackendGbm : public VideoViewsTestBackend {
public:
void OnSetUp(WGPUDevice device) override {
mWGPUDevice = device;
mGbmDevice = CreateGbmDevice();
}
void OnTearDown() override { gbm_device_destroy(mGbmDevice); }
private:
gbm_device* CreateGbmDevice() {
// Render nodes [1] are the primary interface for communicating with the GPU on
// devices that support DRM. The actual filename of the render node is
// implementation-specific, so we must scan through all possible filenames to find
// one that we can use [2].
//
// [1] https://dri.freedesktop.org/docs/drm/gpu/drm-uapi.html#render-nodes
// [2]
// https://cs.chromium.org/chromium/src/ui/ozone/platform/wayland/gpu/drm_render_node_path_finder.cc
const uint32_t kRenderNodeStart = 128;
const uint32_t kRenderNodeEnd = kRenderNodeStart + 16;
const std::string kRenderNodeTemplate = "/dev/dri/renderD";
int renderNodeFd = -1;
for (uint32_t i = kRenderNodeStart; i < kRenderNodeEnd; i++) {
std::string renderNode = kRenderNodeTemplate + std::to_string(i);
renderNodeFd = open(renderNode.c_str(), O_RDWR);
if (renderNodeFd >= 0) {
break;
}
}
ASSERT(renderNodeFd > 0);
gbm_device* gbmDevice = gbm_create_device(renderNodeFd);
ASSERT(gbmDevice != nullptr);
return gbmDevice;
}
static uint32_t GetGbmBoFormat(wgpu::TextureFormat format) {
switch (format) {
case wgpu::TextureFormat::R8BG8Biplanar420Unorm:
return GBM_FORMAT_NV12;
default:
UNREACHABLE();
}
}
WGPUTextureFormat ToWGPUTextureFormat(wgpu::TextureFormat format) {
switch (format) {
case wgpu::TextureFormat::R8BG8Biplanar420Unorm:
return WGPUTextureFormat_R8BG8Biplanar420Unorm;
default:
UNREACHABLE();
}
}
WGPUTextureUsage ToWGPUTextureUsage(wgpu::TextureUsage usage) {
switch (usage) {
case wgpu::TextureUsage::TextureBinding:
return WGPUTextureUsage_TextureBinding;
default:
UNREACHABLE();
}
}
std::unique_ptr<VideoViewsTestBackend::PlatformTexture> CreateVideoTextureForTest(
wgpu::TextureFormat format,
wgpu::TextureUsage usage,
bool isCheckerboard,
bool initialized) override {
// The flags Chromium is using for the VAAPI decoder.
uint32_t flags = GBM_BO_USE_SCANOUT | GBM_BO_USE_TEXTURING | GBM_BO_USE_HW_VIDEO_DECODER;
if (initialized) {
// The flag specifically used for tests, which need to initialize the GBM buffer with
// the expected raw video data via CPU, and then sample and draw the buffer via GPU.
// With the flag added, the buffer's drm modifier will be DRM_FORMAT_MOD_LINEAR instead
// of I915_FORMAT_MOD_Y_TILED.
flags |= GBM_BO_USE_SW_WRITE_RARELY;
}
gbm_bo* gbmBo = gbm_bo_create(mGbmDevice, VideoViewsTests::kYUVImageDataWidthInTexels,
VideoViewsTests::kYUVImageDataHeightInTexels,
GetGbmBoFormat(format), flags);
if (gbmBo == nullptr) {
return nullptr;
}
if (initialized) {
void* mapHandle = nullptr;
uint32_t strideBytes = 0;
void* addr = gbm_bo_map(gbmBo, 0, 0, VideoViewsTests::kYUVImageDataWidthInTexels,
VideoViewsTests::kYUVImageDataHeightInTexels,
GBM_BO_TRANSFER_WRITE, &strideBytes, &mapHandle);
EXPECT_NE(addr, nullptr);
std::vector<uint8_t> initialData =
VideoViewsTests::GetTestTextureData(format, isCheckerboard);
uint8_t* srcBegin = initialData.data();
uint8_t* srcEnd = srcBegin + initialData.size();
uint8_t* dstBegin = static_cast<uint8_t*>(addr);
for (; srcBegin < srcEnd;
srcBegin += VideoViewsTests::kYUVImageDataWidthInTexels, dstBegin += strideBytes) {
std::memcpy(dstBegin, srcBegin, VideoViewsTests::kYUVImageDataWidthInTexels);
}
gbm_bo_unmap(gbmBo, mapHandle);
}
wgpu::TextureDescriptor textureDesc;
textureDesc.format = format;
textureDesc.dimension = wgpu::TextureDimension::e2D;
textureDesc.usage = usage;
textureDesc.size = {VideoViewsTests::kYUVImageDataWidthInTexels,
VideoViewsTests::kYUVImageDataHeightInTexels, 1};
wgpu::DawnTextureInternalUsageDescriptor internalDesc;
internalDesc.internalUsage = wgpu::TextureUsage::CopySrc;
textureDesc.nextInChain = &internalDesc;
native::vulkan::ExternalImageDescriptorDmaBuf descriptor = {};
descriptor.cTextureDescriptor =
reinterpret_cast<const WGPUTextureDescriptor*>(&textureDesc);
descriptor.isInitialized = true;
descriptor.memoryFD = gbm_bo_get_fd(gbmBo);
for (int plane = 0; plane < gbm_bo_get_plane_count(gbmBo); ++plane) {
descriptor.planeLayouts[plane].stride = gbm_bo_get_stride_for_plane(gbmBo, plane);
descriptor.planeLayouts[plane].offset = gbm_bo_get_offset(gbmBo, plane);
}
descriptor.drmModifier = gbm_bo_get_modifier(gbmBo);
descriptor.waitFDs = {};
WGPUTexture texture = native::vulkan::WrapVulkanImage(mWGPUDevice, &descriptor);
if (texture != nullptr) {
return std::make_unique<PlatformTextureGbm>(wgpu::Texture::Acquire(texture), gbmBo);
} else {
return nullptr;
}
}
void DestroyVideoTextureForTest(
std::unique_ptr<VideoViewsTestBackend::PlatformTexture>&& platformTexture) override {
// Exports the signal and ignores it.
native::vulkan::ExternalImageExportInfoDmaBuf exportInfo;
native::vulkan::ExportVulkanImage(platformTexture->wgpuTexture.Get(),
VK_IMAGE_LAYOUT_UNDEFINED, &exportInfo);
for (int fd : exportInfo.semaphoreHandles) {
ASSERT_NE(fd, -1);
close(fd);
}
gbm_bo* gbmBo = static_cast<PlatformTextureGbm*>(platformTexture.get())->GetGbmBo();
ASSERT_NE(gbmBo, nullptr);
gbm_bo_destroy(gbmBo);
}
WGPUDevice mWGPUDevice = nullptr;
gbm_device* mGbmDevice = nullptr;
};
} // anonymous namespace
// static
BackendTestConfig VideoViewsTestBackend::Backend() {
return VulkanBackend();
}
// static
std::unique_ptr<VideoViewsTestBackend> VideoViewsTestBackend::Create() {
return std::make_unique<VideoViewsTestBackendGbm>();
}
} // namespace dawn