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/*
* Copyright (c) 2017 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
#include "modules/desktop_capture/win/dxgi_frame.h"
#include <string.h>
#include <utility>
#include "modules/desktop_capture/desktop_frame.h"
#include "modules/desktop_capture/win/dxgi_duplicator_controller.h"
#include "rtc_base/checks.h"
#include "rtc_base/logging.h"
namespace webrtc {
DxgiFrame::DxgiFrame(SharedMemoryFactory* factory) : factory_(factory) {}
DxgiFrame::~DxgiFrame() = default;
bool DxgiFrame::Prepare(DesktopSize size, DesktopCapturer::SourceId source_id) {
if (source_id != source_id_) {
// Once the source has been changed, the entire source should be copied.
source_id_ = source_id;
context_.Reset();
}
if (resolution_tracker_.SetResolution(size)) {
// Once the output size changed, recreate the SharedDesktopFrame.
frame_.reset();
}
if (!frame_) {
std::unique_ptr<DesktopFrame> frame;
if (factory_) {
frame = SharedMemoryDesktopFrame::Create(size, factory_);
if (!frame) {
RTC_LOG(LS_WARNING) << "DxgiFrame cannot create a new DesktopFrame.";
return false;
}
// DirectX capturer won't paint each pixel in the frame due to its one
// capturer per monitor design. So once the new frame is created, we
// should clear it to avoid the legacy image to be remained on it. See
// http://crbug.com/708766.
RTC_DCHECK_EQ(frame->stride(),
frame->size().width() * DesktopFrame::kBytesPerPixel);
memset(frame->data(), 0, frame->stride() * frame->size().height());
} else {
frame.reset(new BasicDesktopFrame(size));
}
frame_ = SharedDesktopFrame::Wrap(std::move(frame));
}
return !!frame_;
}
SharedDesktopFrame* DxgiFrame::frame() const {
RTC_DCHECK(frame_);
return frame_.get();
}
DxgiFrame::Context* DxgiFrame::context() {
RTC_DCHECK(frame_);
return &context_;
}
} // namespace webrtc
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