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// 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.
#include "chrome/browser/ui/views/media_preview/camera_preview/video_stream_view.h"
#include <algorithm>
#include <utility>
#include "chrome/browser/ui/views/chrome_layout_provider.h"
#include "chrome/browser/ui/views/media_preview/camera_preview/video_format_comparison.h"
#include "chrome/grit/generated_resources.h"
#include "content/public/browser/context_factory.h"
#include "media/base/video_transformation.h"
#include "media/base/video_util.h"
#include "ui/base/l10n/l10n_util.h"
#include "ui/base/metadata/metadata_impl_macros.h"
#include "ui/color/color_provider.h"
#include "ui/compositor/compositor.h"
#include "ui/gfx/canvas.h"
#include "ui/views/accessibility/view_accessibility.h"
VideoStreamView::VideoStreamView()
: targeted_aspect_ratio_(video_format_comparison::kDefaultAspectRatio),
rounded_radius_(ChromeLayoutProvider::Get()->GetCornerRadiusMetric(
views::Emphasis::kHigh)),
// Placeholder initialization. OnThemeChanged() is expected to be called
// to re-assign `preview_base_color_` value.
preview_base_color_(SK_ColorBLACK) {
GetViewAccessibility().SetRole(ax::mojom::Role::kImage);
GetViewAccessibility().SetName(l10n_util::GetStringUTF16(
IDS_MEDIA_PREVIEW_VIDEO_STREAM_ACCESSIBLE_NAME));
raster_context_provider_ =
content::GetContextFactory()->SharedMainThreadRasterContextProvider();
if (raster_context_provider_) {
raster_context_provider_->AddObserver(this);
}
}
VideoStreamView::~VideoStreamView() {
ClearFrame();
if (raster_context_provider_) {
raster_context_provider_->RemoveObserver(this);
}
}
void VideoStreamView::OnContextLost() {
if (raster_context_provider_) {
raster_context_provider_->RemoveObserver(this);
}
raster_context_provider_ =
content::GetContextFactory()->SharedMainThreadRasterContextProvider();
if (raster_context_provider_) {
raster_context_provider_->AddObserver(this);
}
}
void VideoStreamView::ScheduleFramePaint(
scoped_refptr<media::VideoFrame> frame) {
latest_frame_ = std::move(frame);
SchedulePaint();
}
void VideoStreamView::ClearFrame() {
video_renderer_.ResetCache();
latest_frame_.reset();
rendered_frame_count_ = 0;
PreferredSizeChanged();
SchedulePaint();
}
size_t VideoStreamView::GetRenderedFrameCount() {
return rendered_frame_count_;
}
void VideoStreamView::OnPaint(gfx::Canvas* canvas) {
const auto background_rect = SkRect::MakeWH(width(), height());
canvas->sk_canvas()->clipRRect(
SkRRect::MakeRectXY(background_rect, rounded_radius_, rounded_radius_),
/*do_anti_alias=*/true);
cc::PaintFlags background_flags;
background_flags.setAntiAlias(true);
background_flags.setColor(preview_base_color_);
canvas->sk_canvas()->drawRect(background_rect, background_flags);
if (!latest_frame_) {
return;
}
++rendered_frame_count_;
media::PaintCanvasVideoRenderer::PaintParams paint_params;
paint_params.dest_rect = gfx::RectF(media::ComputeLetterboxRegion(
{width(), height()}, latest_frame_->natural_size()));
paint_params.transformation.mirrored = true;
cc::PaintFlags flags;
// Select high quality frame scaling.
flags.setFilterQuality(cc::PaintFlags::FilterQuality::kHigh);
flags.setAntiAlias(true);
video_renderer_.Paint(std::move(latest_frame_), canvas->sk_canvas(), flags,
paint_params, raster_context_provider_.get());
}
gfx::Size VideoStreamView::CalculatePreferredSize(
const views::SizeBounds& /*available_size*/) const {
return gfx::Size(width(), width() / targeted_aspect_ratio_);
}
void VideoStreamView::OnThemeChanged() {
views::View::OnThemeChanged();
preview_base_color_ = GetColorProvider()->GetColor(ui::kColorSysSurface2);
}
BEGIN_METADATA(VideoStreamView)
END_METADATA
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