138 lines
4.6 KiB
C++
138 lines
4.6 KiB
C++
// Copyright (c) 2015 GitHub, Inc.
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// Use of this source code is governed by the MIT license that can be
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// found in the LICENSE file.
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#include "libcef/browser/osr/video_consumer_osr.h"
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#include "libcef/browser/osr/render_widget_host_view_osr.h"
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#include "media/base/video_frame_metadata.h"
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#include "media/capture/mojom/video_capture_types.mojom.h"
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#include "ui/gfx/skbitmap_operations.h"
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namespace {
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// Helper to always call Done() at the end of OnFrameCaptured().
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class ScopedVideoFrameDone {
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public:
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explicit ScopedVideoFrameDone(
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mojo::PendingRemote<viz::mojom::FrameSinkVideoConsumerFrameCallbacks>
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callbacks)
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: callbacks_(std::move(callbacks)) {}
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~ScopedVideoFrameDone() { callbacks_->Done(); }
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private:
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mojo::Remote<viz::mojom::FrameSinkVideoConsumerFrameCallbacks> callbacks_;
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};
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} // namespace
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CefVideoConsumerOSR::CefVideoConsumerOSR(CefRenderWidgetHostViewOSR* view)
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: view_(view), video_capturer_(view->CreateVideoCapturer()) {
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video_capturer_->SetFormat(media::PIXEL_FORMAT_ARGB,
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gfx::ColorSpace::CreateREC709());
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// Always use the highest resolution within constraints that doesn't exceed
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// the source size.
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video_capturer_->SetAutoThrottlingEnabled(false);
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video_capturer_->SetMinSizeChangePeriod(base::TimeDelta());
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SizeChanged(view_->SizeInPixels());
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SetActive(true);
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}
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CefVideoConsumerOSR::~CefVideoConsumerOSR() = default;
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void CefVideoConsumerOSR::SetActive(bool active) {
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if (active) {
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video_capturer_->Start(this);
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} else {
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video_capturer_->Stop();
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}
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}
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void CefVideoConsumerOSR::SetFrameRate(base::TimeDelta frame_rate) {
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video_capturer_->SetMinCapturePeriod(frame_rate);
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}
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void CefVideoConsumerOSR::SizeChanged(const gfx::Size& size_in_pixels) {
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if (size_in_pixels_ == size_in_pixels)
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return;
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size_in_pixels_ = size_in_pixels;
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// Capture resolution will be held constant.
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video_capturer_->SetResolutionConstraints(size_in_pixels, size_in_pixels,
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true /* use_fixed_aspect_ratio */);
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}
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void CefVideoConsumerOSR::RequestRefreshFrame(
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const base::Optional<gfx::Rect>& bounds_in_pixels) {
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bounds_in_pixels_ = bounds_in_pixels;
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video_capturer_->RequestRefreshFrame();
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}
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// Frame size values are as follows:
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// info->coded_size = Width and height of the video frame. Not all pixels in
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// this region are valid.
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// info->visible_rect = Region of coded_size that contains image data, also
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// known as the clean aperture.
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// content_rect = Region of the frame that contains the captured content, with
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// the rest of the frame having been letterboxed to adhere to resolution
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// constraints.
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void CefVideoConsumerOSR::OnFrameCaptured(
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base::ReadOnlySharedMemoryRegion data,
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::media::mojom::VideoFrameInfoPtr info,
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const gfx::Rect& content_rect,
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mojo::PendingRemote<viz::mojom::FrameSinkVideoConsumerFrameCallbacks>
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callbacks) {
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ScopedVideoFrameDone scoped_done(std::move(callbacks));
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if (!data.IsValid())
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return;
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base::ReadOnlySharedMemoryMapping mapping = data.Map();
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if (!mapping.IsValid()) {
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DLOG(ERROR) << "Shared memory mapping failed.";
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return;
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}
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if (mapping.size() <
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media::VideoFrame::AllocationSize(info->pixel_format, info->coded_size)) {
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DLOG(ERROR) << "Shared memory size was less than expected.";
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return;
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}
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// The SkBitmap's pixels will be marked as immutable, but the installPixels()
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// API requires a non-const pointer. So, cast away the const.
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void* const pixels = const_cast<void*>(mapping.memory());
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media::VideoFrameMetadata metadata = info->metadata;
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gfx::Rect damage_rect;
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if (bounds_in_pixels_) {
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// Use the bounds passed to RequestRefreshFrame().
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damage_rect = gfx::Rect(info->coded_size);
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damage_rect.Intersect(*bounds_in_pixels_);
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bounds_in_pixels_ = base::nullopt;
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} else {
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// Retrieve the rectangular region of the frame that has changed since the
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// frame with the directly preceding CAPTURE_COUNTER. If that frame was not
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// received, typically because it was dropped during transport from the
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// producer, clients must assume that the entire frame has changed.
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// This rectangle is relative to the full frame data, i.e. [0, 0,
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// coded_size.width(), coded_size.height()]. It does not have to be
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// fully contained within visible_rect.
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if (metadata.capture_update_rect) {
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damage_rect = *metadata.capture_update_rect;
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}
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if (damage_rect.IsEmpty()) {
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damage_rect = gfx::Rect(info->coded_size);
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}
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}
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view_->OnPaint(damage_rect, info->coded_size, pixels);
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}
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void CefVideoConsumerOSR::OnStopped() {}
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void CefVideoConsumerOSR::OnLog(const std::string& message) {}
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