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/*
* Copyright (c) 2016 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_adapter_duplicator.h"
#include <comdef.h>
#include <dxgi.h>
#include <algorithm>
#include "modules/desktop_capture/win/desktop_capture_utils.h"
#include "rtc_base/checks.h"
#include "rtc_base/logging.h"
namespace webrtc {
using Microsoft::WRL::ComPtr;
namespace {
bool IsValidRect(const RECT& rect) {
return rect.right > rect.left && rect.bottom > rect.top;
}
} // namespace
DxgiAdapterDuplicator::DxgiAdapterDuplicator(const D3dDevice& device)
: device_(device) {}
DxgiAdapterDuplicator::DxgiAdapterDuplicator(DxgiAdapterDuplicator&&) = default;
DxgiAdapterDuplicator::~DxgiAdapterDuplicator() = default;
bool DxgiAdapterDuplicator::Initialize() {
if (DoInitialize()) {
return true;
}
duplicators_.clear();
return false;
}
bool DxgiAdapterDuplicator::DoInitialize() {
for (int i = 0;; i++) {
ComPtr<IDXGIOutput> output;
_com_error error =
device_.dxgi_adapter()->EnumOutputs(i, output.GetAddressOf());
if (error.Error() == DXGI_ERROR_NOT_FOUND) {
break;
}
if (error.Error() == DXGI_ERROR_NOT_CURRENTLY_AVAILABLE) {
RTC_LOG(LS_WARNING) << "IDXGIAdapter::EnumOutputs returned "
<< "NOT_CURRENTLY_AVAILABLE. This may happen when "
<< "running in session 0.";
break;
}
if (error.Error() != S_OK || !output) {
RTC_LOG(LS_WARNING) << "IDXGIAdapter::EnumOutputs returned an unexpected "
<< "result: "
<< desktop_capture::utils::ComErrorToString(error);
continue;
}
DXGI_OUTPUT_DESC desc;
error = output->GetDesc(&desc);
if (error.Error() == S_OK) {
if (desc.AttachedToDesktop && IsValidRect(desc.DesktopCoordinates)) {
ComPtr<IDXGIOutput1> output1;
error = output.As(&output1);
if (error.Error() != S_OK || !output1) {
RTC_LOG(LS_WARNING)
<< "Failed to convert IDXGIOutput to IDXGIOutput1, this usually "
<< "means the system does not support DirectX 11";
continue;
}
DxgiOutputDuplicator duplicator(device_, output1, desc);
if (!duplicator.Initialize()) {
RTC_LOG(LS_WARNING) << "Failed to initialize DxgiOutputDuplicator on "
<< "output " << i;
continue;
}
duplicators_.push_back(std::move(duplicator));
desktop_rect_.UnionWith(duplicators_.back().desktop_rect());
} else {
RTC_LOG(LS_ERROR) << (desc.AttachedToDesktop ? "Attached" : "Detached")
<< " output " << i << " ("
<< desc.DesktopCoordinates.top << ", "
<< desc.DesktopCoordinates.left << ") - ("
<< desc.DesktopCoordinates.bottom << ", "
<< desc.DesktopCoordinates.right << ") is ignored.";
}
} else {
RTC_LOG(LS_WARNING) << "Failed to get output description of device " << i
<< ", ignore.";
}
}
if (duplicators_.empty()) {
RTC_LOG(LS_WARNING)
<< "Cannot initialize any DxgiOutputDuplicator instance.";
}
return !duplicators_.empty();
}
void DxgiAdapterDuplicator::Setup(Context* context) {
RTC_DCHECK(context->contexts.empty());
context->contexts.resize(duplicators_.size());
for (size_t i = 0; i < duplicators_.size(); i++) {
duplicators_[i].Setup(&context->contexts[i]);
}
}
void DxgiAdapterDuplicator::Unregister(const Context* const context) {
RTC_DCHECK_EQ(context->contexts.size(), duplicators_.size());
for (size_t i = 0; i < duplicators_.size(); i++) {
duplicators_[i].Unregister(&context->contexts[i]);
}
}
bool DxgiAdapterDuplicator::Duplicate(Context* context,
SharedDesktopFrame* target) {
RTC_DCHECK_EQ(context->contexts.size(), duplicators_.size());
for (size_t i = 0; i < duplicators_.size(); i++) {
if (!duplicators_[i].Duplicate(&context->contexts[i],
duplicators_[i].desktop_rect().top_left(),
target)) {
return false;
}
}
return true;
}
bool DxgiAdapterDuplicator::DuplicateMonitor(Context* context,
int monitor_id,
SharedDesktopFrame* target) {
RTC_DCHECK_GE(monitor_id, 0);
RTC_DCHECK_LT(monitor_id, duplicators_.size());
RTC_DCHECK_EQ(context->contexts.size(), duplicators_.size());
return duplicators_[monitor_id].Duplicate(&context->contexts[monitor_id],
DesktopVector(), target);
}
DesktopRect DxgiAdapterDuplicator::ScreenRect(int id) const {
RTC_DCHECK_GE(id, 0);
RTC_DCHECK_LT(id, duplicators_.size());
return duplicators_[id].desktop_rect();
}
const std::string& DxgiAdapterDuplicator::GetDeviceName(int id) const {
RTC_DCHECK_GE(id, 0);
RTC_DCHECK_LT(id, duplicators_.size());
return duplicators_[id].device_name();
}
int DxgiAdapterDuplicator::screen_count() const {
return static_cast<int>(duplicators_.size());
}
int64_t DxgiAdapterDuplicator::GetNumFramesCaptured() const {
int64_t min = INT64_MAX;
for (const auto& duplicator : duplicators_) {
min = std::min(min, duplicator.num_frames_captured());
}
return min;
}
void DxgiAdapterDuplicator::TranslateRect(const DesktopVector& position) {
desktop_rect_.Translate(position);
RTC_DCHECK_GE(desktop_rect_.left(), 0);
RTC_DCHECK_GE(desktop_rect_.top(), 0);
for (auto& duplicator : duplicators_) {
duplicator.TranslateRect(position);
}
}
} // namespace webrtc
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