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// Copyright 2018 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 "content/browser/devtools/devtools_video_consumer.h"
#include "cc/paint/skia_paint_canvas.h"
#include "components/viz/host/host_frame_sink_manager.h"
#include "components/viz/service/frame_sinks/video_capture/frame_sink_video_capturer_impl.h"
#include "content/browser/compositor/surface_utils.h"
#include "media/base/limits.h"
#include "media/renderers/paint_canvas_video_renderer.h"
namespace content {
namespace {
// Frame capture period is 10 frames per second by default.
constexpr base::TimeDelta kDefaultMinCapturePeriod =
base::TimeDelta::FromMilliseconds(100);
// Frame size can change every frame.
constexpr base::TimeDelta kDefaultMinPeriod = base::TimeDelta();
// Allow variable aspect ratio.
const bool kDefaultUseFixedAspectRatio = false;
} // namespace
// static
constexpr gfx::Size DevToolsVideoConsumer::kDefaultMinFrameSize;
// static
constexpr gfx::Size DevToolsVideoConsumer::kDefaultMaxFrameSize;
DevToolsVideoConsumer::DevToolsVideoConsumer(OnFrameCapturedCallback callback)
: callback_(std::move(callback)),
min_capture_period_(kDefaultMinCapturePeriod),
min_frame_size_(kDefaultMinFrameSize),
max_frame_size_(kDefaultMaxFrameSize),
binding_(this) {}
DevToolsVideoConsumer::~DevToolsVideoConsumer() = default;
// static
SkBitmap DevToolsVideoConsumer::GetSkBitmapFromFrame(
scoped_refptr<media::VideoFrame> frame) {
media::PaintCanvasVideoRenderer renderer;
SkBitmap skbitmap;
skbitmap.allocN32Pixels(frame->visible_rect().width(),
frame->visible_rect().height());
cc::SkiaPaintCanvas canvas(skbitmap);
renderer.Copy(frame, &canvas, media::Context3D());
return skbitmap;
}
void DevToolsVideoConsumer::StartCapture() {
if (capturer_)
return;
InnerStartCapture(CreateCapturer());
}
void DevToolsVideoConsumer::StopCapture() {
if (!capturer_)
return;
binding_.Close();
capturer_->Stop();
capturer_.reset();
}
void DevToolsVideoConsumer::SetFrameSinkId(
const viz::FrameSinkId& frame_sink_id) {
frame_sink_id_ = frame_sink_id;
if (capturer_)
capturer_->ChangeTarget(frame_sink_id_);
}
void DevToolsVideoConsumer::SetMinCapturePeriod(
base::TimeDelta min_capture_period) {
min_capture_period_ = min_capture_period;
if (capturer_)
capturer_->SetMinCapturePeriod(min_capture_period_);
}
void DevToolsVideoConsumer::SetMinAndMaxFrameSize(gfx::Size min_frame_size,
gfx::Size max_frame_size) {
DCHECK(IsValidMinAndMaxFrameSize(min_frame_size, max_frame_size));
min_frame_size_ = min_frame_size;
max_frame_size_ = max_frame_size;
if (capturer_) {
capturer_->SetResolutionConstraints(min_frame_size_, max_frame_size_,
kDefaultUseFixedAspectRatio);
}
}
viz::mojom::FrameSinkVideoCapturerPtrInfo
DevToolsVideoConsumer::CreateCapturer() {
viz::HostFrameSinkManager* const manager = GetHostFrameSinkManager();
viz::mojom::FrameSinkVideoCapturerPtr capturer;
manager->CreateVideoCapturer(mojo::MakeRequest(&capturer));
return capturer.PassInterface();
}
void DevToolsVideoConsumer::InnerStartCapture(
viz::mojom::FrameSinkVideoCapturerPtrInfo capturer_info) {
capturer_.Bind(std::move(capturer_info));
// Give |capturer_| the capture parameters.
capturer_->SetMinCapturePeriod(min_capture_period_);
capturer_->SetMinSizeChangePeriod(kDefaultMinPeriod);
capturer_->SetResolutionConstraints(min_frame_size_, max_frame_size_,
kDefaultUseFixedAspectRatio);
capturer_->ChangeTarget(frame_sink_id_);
viz::mojom::FrameSinkVideoConsumerPtr consumer;
binding_.Bind(mojo::MakeRequest(&consumer));
capturer_->Start(std::move(consumer));
}
bool DevToolsVideoConsumer::IsValidMinAndMaxFrameSize(
gfx::Size min_frame_size,
gfx::Size max_frame_size) {
// Returns true if
// 0 < |min_frame_size| <= |max_frame_size| <= media::limits::kMaxDimension.
return 0 < min_frame_size.width() && 0 < min_frame_size.height() &&
min_frame_size.width() <= max_frame_size.width() &&
min_frame_size.height() <= max_frame_size.height() &&
max_frame_size.width() <= media::limits::kMaxDimension &&
max_frame_size.height() <= media::limits::kMaxDimension;
}
void DevToolsVideoConsumer::OnFrameCaptured(
mojo::ScopedSharedBufferHandle buffer,
uint32_t buffer_size,
::media::mojom::VideoFrameInfoPtr info,
const gfx::Rect& update_rect,
const gfx::Rect& content_rect,
viz::mojom::FrameSinkVideoConsumerFrameCallbacksPtr callbacks) {
if (!buffer.is_valid())
return;
mojo::ScopedSharedBufferMapping mapping = buffer->Map(buffer_size);
if (!mapping) {
DLOG(ERROR) << "Shared memory mapping failed.";
return;
}
scoped_refptr<media::VideoFrame> frame;
// Setting |frame|'s visible rect equal to |content_rect| so that only the
// portion of the frame that contain content are used.
frame = media::VideoFrame::WrapExternalData(
info->pixel_format, info->coded_size, info->visible_rect,
info->visible_rect.size(), static_cast<uint8_t*>(mapping.get()),
buffer_size, info->timestamp);
if (!frame)
return;
frame->AddDestructionObserver(base::BindOnce(
[](mojo::ScopedSharedBufferMapping mapping) {}, std::move(mapping)));
frame->metadata()->MergeInternalValuesFrom(info->metadata);
callback_.Run(std::move(frame));
}
void DevToolsVideoConsumer::OnTargetLost(
const viz::FrameSinkId& frame_sink_id) {}
void DevToolsVideoConsumer::OnStopped() {}
} // namespace content
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