dual_buffer_frame_consumer.cc | Explore in Territory

// Copyright 2016 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 "remoting/client/dual_buffer_frame_consumer.h"

#include <memory>

#include "base/check.h"
#include "base/functional/bind.h"
#include "base/functional/callback_helpers.h"
#include "base/location.h"
#include "base/task/single_thread_task_runner.h"

namespace remoting {

namespace {

// The implementation is mostly the same as webrtc::BasicDesktopFrame, except
// that it has an extra padding of one row at the end of the buffer. This is
// to workaround a bug in iOS' implementation of glTexSubimage2D that causes
// occasional SIGSEGV.
//
// glTexSubimage2D is supposed to only read
// kBytesPerPixel * width * (height - 1) bytes from the buffer but it seems to
// be reading more than that, which may end up reading protected memory.
//
// See details in crbug.com/778550
class PaddedDesktopFrame : public webrtc::DesktopFrame { … };

PaddedDesktopFrame::PaddedDesktopFrame(webrtc::DesktopSize size)
    : … { … }

PaddedDesktopFrame::~PaddedDesktopFrame() { … }

// static
std::unique_ptr<webrtc::DesktopFrame> PaddedDesktopFrame::CopyOf(
    const webrtc::DesktopFrame& frame) { … }

}  // namespace

DualBufferFrameConsumer::DualBufferFrameConsumer(
    RenderCallback callback,
    scoped_refptr<base::SingleThreadTaskRunner> task_runner,
    protocol::FrameConsumer::PixelFormat format)
    : … { … }

DualBufferFrameConsumer::~DualBufferFrameConsumer() { … }

void DualBufferFrameConsumer::RequestFullDesktopFrame() { … }

std::unique_ptr<webrtc::DesktopFrame> DualBufferFrameConsumer::AllocateFrame(
    const webrtc::DesktopSize& size) { … }

void DualBufferFrameConsumer::DrawFrame(
    std::unique_ptr<webrtc::DesktopFrame> frame,
    base::OnceClosure done) { … }

protocol::FrameConsumer::PixelFormat
DualBufferFrameConsumer::GetPixelFormat() { … }

base::WeakPtr<DualBufferFrameConsumer> DualBufferFrameConsumer::GetWeakPtr() { … }

void DualBufferFrameConsumer::RunRenderCallback(
    std::unique_ptr<webrtc::DesktopFrame> frame,
    base::OnceClosure done) { … }

}  // namespace remoting
chromium/remoting/client/dual_buffer_frame_consumer.cc
