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// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "remoting/client/plugin/pepper_video_renderer_2d.h"
#include <stdint.h>
#include <utility>
#include "base/bind.h"
#include "base/callback_helpers.h"
#include "base/strings/string_util.h"
#include "base/task_runner_util.h"
#include "ppapi/cpp/completion_callback.h"
#include "ppapi/cpp/image_data.h"
#include "ppapi/cpp/instance.h"
#include "ppapi/cpp/point.h"
#include "ppapi/cpp/rect.h"
#include "ppapi/cpp/size.h"
#include "remoting/base/util.h"
#include "remoting/client/client_context.h"
#include "remoting/client/software_video_renderer.h"
#include "remoting/proto/video.pb.h"
#include "remoting/protocol/performance_tracker.h"
#include "third_party/libyuv/include/libyuv/scale_argb.h"
#include "third_party/webrtc/modules/desktop_capture/desktop_frame.h"
namespace remoting {
namespace {
// DesktopFrame that wraps a supplied pp::ImageData
class PepperDesktopFrame : public webrtc::DesktopFrame {
public:
// Wraps the supplied ImageData.
explicit PepperDesktopFrame(const pp::ImageData& buffer)
: DesktopFrame(
webrtc::DesktopSize(buffer.size().width(), buffer.size().height()),
buffer.stride(),
reinterpret_cast<uint8_t*>(buffer.data()),
nullptr),
buffer_(buffer) {}
// Access to underlying pepper representation.
const pp::ImageData& buffer() const {
return buffer_;
}
private:
pp::ImageData buffer_;
};
} // namespace
PepperVideoRenderer2D::PepperVideoRenderer2D()
: callback_factory_(this),
weak_factory_(this) {}
PepperVideoRenderer2D::~PepperVideoRenderer2D() {}
bool PepperVideoRenderer2D::Initialize(
pp::Instance* instance,
const ClientContext& context,
EventHandler* event_handler,
protocol::PerformanceTracker* perf_tracker) {
DCHECK(thread_checker_.CalledOnValidThread());
DCHECK(!instance_);
DCHECK(!event_handler_);
DCHECK(instance);
DCHECK(event_handler);
instance_ = instance;
event_handler_ = event_handler;
software_video_renderer_.reset(new SoftwareVideoRenderer(
context.decode_task_runner(), this, perf_tracker));
return true;
}
void PepperVideoRenderer2D::OnViewChanged(const pp::View& view) {
DCHECK(thread_checker_.CalledOnValidThread());
pp::Rect pp_size = view.GetRect();
view_size_ = webrtc::DesktopSize(pp_size.width(), pp_size.height());
// Update scale if graphics2d has been initialized.
if (!graphics2d_.is_null() && source_size_.width() > 0) {
graphics2d_.SetScale(static_cast<float>(view_size_.width()) /
source_size_.width());
// Bind graphics2d_ again after changing the scale to work around
// crbug.com/521745 .
instance_->BindGraphics(graphics2d_);
bool result = instance_->BindGraphics(graphics2d_);
DCHECK(result) << "Couldn't bind the device context.";
}
}
void PepperVideoRenderer2D::EnableDebugDirtyRegion(bool enable) {
debug_dirty_region_ = enable;
}
void PepperVideoRenderer2D::OnSessionConfig(
const protocol::SessionConfig& config) {
DCHECK(thread_checker_.CalledOnValidThread());
software_video_renderer_->OnSessionConfig(config);
}
protocol::VideoStub* PepperVideoRenderer2D::GetVideoStub() {
DCHECK(thread_checker_.CalledOnValidThread());
return software_video_renderer_->GetVideoStub();
}
protocol::FrameConsumer* PepperVideoRenderer2D::GetFrameConsumer() {
DCHECK(thread_checker_.CalledOnValidThread());
return software_video_renderer_->GetFrameConsumer();
}
scoped_ptr<webrtc::DesktopFrame> PepperVideoRenderer2D::AllocateFrame(
const webrtc::DesktopSize& size) {
DCHECK(thread_checker_.CalledOnValidThread());
pp::ImageData buffer_data(instance_, PP_IMAGEDATAFORMAT_BGRA_PREMUL,
pp::Size(size.width(), size.height()), false);
return make_scoped_ptr(new PepperDesktopFrame(buffer_data));
}
void PepperVideoRenderer2D::DrawFrame(scoped_ptr<webrtc::DesktopFrame> frame,
const base::Closure& done) {
DCHECK(thread_checker_.CalledOnValidThread());
if (!frame_received_) {
event_handler_->OnVideoFirstFrameReceived();
frame_received_ = true;
}
bool size_changed = !source_size_.equals(frame->size());
if (size_changed) {
source_size_ = frame->size();
// Create a 2D rendering context with the new dimensions.
graphics2d_ = pp::Graphics2D(
instance_, pp::Size(source_size_.width(), source_size_.height()), true);
graphics2d_.SetScale(static_cast<float>(view_size_.width()) /
source_size_.width());
bool result = instance_->BindGraphics(graphics2d_);
DCHECK(result) << "Couldn't bind the device context.";
}
if (size_changed || !source_dpi_.equals(frame->dpi())) {
source_dpi_ = frame->dpi();
// Notify JavaScript of the change in source size.
event_handler_->OnVideoSize(source_size_, source_dpi_);
}
const webrtc::DesktopRegion* shape = frame->shape();
if (shape) {
if (!source_shape_ || !source_shape_->Equals(*shape)) {
source_shape_ = make_scoped_ptr(new webrtc::DesktopRegion(*shape));
event_handler_->OnVideoShape(source_shape_.get());
}
} else if (source_shape_) {
source_shape_ = nullptr;
event_handler_->OnVideoShape(nullptr);
}
// If Debug dirty region is enabled then emit it.
if (debug_dirty_region_)
event_handler_->OnVideoFrameDirtyRegion(frame->updated_region());
const pp::ImageData& image_data =
static_cast<PepperDesktopFrame*>(frame.get())->buffer();
for (webrtc::DesktopRegion::Iterator i(frame->updated_region()); !i.IsAtEnd();
i.Advance()) {
graphics2d_.PaintImageData(image_data, pp::Point(0, 0),
pp::Rect(i.rect().left(), i.rect().top(),
i.rect().width(), i.rect().height()));
}
if (!done.is_null()) {
pending_frames_done_callbacks_.push_back(
new base::ScopedClosureRunner(done));
}
need_flush_ = true;
Flush();
}
protocol::FrameConsumer::PixelFormat PepperVideoRenderer2D::GetPixelFormat() {
return FORMAT_BGRA;
}
void PepperVideoRenderer2D::Flush() {
DCHECK(thread_checker_.CalledOnValidThread());
if (flush_pending_ || !need_flush_)
return;
need_flush_ = false;
// Move callbacks from |pending_frames_done_callbacks_| to
// |flushing_frames_done_callbacks_| so the callbacks are called when flush is
// finished.
DCHECK(flushing_frames_done_callbacks_.empty());
flushing_frames_done_callbacks_ = std::move(pending_frames_done_callbacks_);
// Flush the updated areas to the screen.
int error = graphics2d_.Flush(
callback_factory_.NewCallback(&PepperVideoRenderer2D::OnFlushDone));
CHECK(error == PP_OK_COMPLETIONPENDING);
flush_pending_ = true;
}
void PepperVideoRenderer2D::OnFlushDone(int result) {
DCHECK(thread_checker_.CalledOnValidThread());
DCHECK(flush_pending_);
flush_pending_ = false;
// Call all callbacks for the frames we've just flushed.
flushing_frames_done_callbacks_.clear();
// Flush again if necessary.
Flush();
}
} // namespace remoting
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