chromium/media/capture/video/linux/v4l2_capture_delegate_gpu_helper.cc

// Copyright 2023 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifdef UNSAFE_BUFFERS_BUILD
// TODO(crbug.com/40285824): Remove this and convert code to safer constructs.
#pragma allow_unsafe_buffers
#endif

#include "media/capture/video/linux/v4l2_capture_delegate_gpu_helper.h"

#include "base/trace_event/trace_event.h"
#include "third_party/libyuv/include/libyuv.h"
#include "ui/gfx/gpu_memory_buffer.h"

namespace media {

namespace {
constexpr media::VideoPixelFormat kTargetPixelFormat = …;
constexpr gfx::BufferFormat kTargetBufferFormat = …;

libyuv::FourCC VideoCaptureFormatToLibyuvFourcc(
    const VideoCaptureFormat& capture_format) { … }

libyuv::RotationMode TranslateRotation(int rotation_degrees) { … }

}  // namespace

V4L2CaptureDelegateGpuHelper::V4L2CaptureDelegateGpuHelper(
    std::unique_ptr<gpu::GpuMemoryBufferSupport> gmb_support)
    : … { … }

V4L2CaptureDelegateGpuHelper::~V4L2CaptureDelegateGpuHelper() = default;

int V4L2CaptureDelegateGpuHelper::OnIncomingCapturedData(
    VideoCaptureDevice::Client* client,
    const uint8_t* sample,
    size_t sample_size,
    const VideoCaptureFormat& capture_format,
    const gfx::ColorSpace& data_color_space,
    int rotation,
    base::TimeTicks reference_time,
    base::TimeDelta timestamp,
    int frame_feedback_id) { … }

int V4L2CaptureDelegateGpuHelper::ConvertCaptureDataToNV12(
    const uint8_t* sample,
    size_t sample_size,
    const VideoCaptureFormat& capture_format,
    const gfx::Size& dimensions,
    const gfx::ColorSpace& data_color_space,
    int rotation,
    uint8_t* dst_y,
    uint8_t* dst_uv,
    int dst_stride_y,
    int dst_stride_uv) { … }

int V4L2CaptureDelegateGpuHelper::FastConvertToNV12(
    const uint8_t* sample,
    size_t sample_size,
    const VideoCaptureFormat& capture_format,
    uint8_t* dst_y,
    uint8_t* dst_uv,
    int dst_stride_y,
    int dst_stride_uv) { … }

bool V4L2CaptureDelegateGpuHelper::IsNV12ConvertSupported(uint32_t fourcc) { … }

}  // namespace media