1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157
|
// Copyright 2012 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "remoting/host/ipc_video_frame_capturer.h"
#include "base/check.h"
#include "base/notimplemented.h"
#include "remoting/host/desktop_session_proxy.h"
#include "remoting/host/video_memory_utils.h"
#include "third_party/webrtc/modules/desktop_capture/desktop_frame.h"
#include "third_party/webrtc/modules/desktop_capture/desktop_geometry.h"
#include "third_party/webrtc/modules/desktop_capture/shared_memory.h"
namespace remoting {
IpcVideoFrameCapturer::IpcVideoFrameCapturer(
scoped_refptr<DesktopSessionProxy> desktop_session_proxy)
: desktop_session_proxy_(desktop_session_proxy) {}
IpcVideoFrameCapturer::~IpcVideoFrameCapturer() = default;
void IpcVideoFrameCapturer::OnCreateVideoCapturerResult(
mojom::CreateVideoCapturerResultPtr result) {
if (capturer_control_) {
// Perform cleanup, just as if the previous endpoint became disconnected.
// This replies to any pending frame requests, clears any shared-memory
// buffers, and resets the Mojo endpoints.
OnDisconnect();
}
capturer_control_.Bind(std::move(result->video_capturer));
event_handler_.Bind(std::move(result->video_capturer_event_handler));
capturer_control_.set_disconnect_handler(base::BindOnce(
&IpcVideoFrameCapturer::OnDisconnect, base::Unretained(this)));
}
base::WeakPtr<IpcVideoFrameCapturer> IpcVideoFrameCapturer::GetWeakPtr() {
return weak_factory_.GetWeakPtr();
}
void IpcVideoFrameCapturer::Start(Callback* callback) {
DCHECK(!callback_);
DCHECK(callback);
callback_ = callback;
}
void IpcVideoFrameCapturer::CaptureFrame() {
if (capturer_control_) {
++pending_capture_frame_requests_;
capturer_control_->CaptureFrame();
} else {
callback_->OnCaptureResult(webrtc::DesktopCapturer::Result::ERROR_TEMPORARY,
nullptr);
}
}
bool IpcVideoFrameCapturer::GetSourceList(SourceList* sources) {
NOTIMPLEMENTED();
return false;
}
bool IpcVideoFrameCapturer::SelectSource(SourceId id) {
// This should only be called in single-stream mode. DesktopSessionProxy will
// request a new capturer be created in the Desktop process. When the new Mojo
// endpoints are received by OnCreateVideoCapturerResult(), the old endpoints
// will be disconnected and the Desktop process will delete the old capturer.
desktop_session_proxy_->RebindSingleVideoCapturer(id, GetWeakPtr());
return true;
}
void IpcVideoFrameCapturer::SetComposeEnabled(bool enabled) {
if (capturer_control_) {
capturer_control_->SetComposeEnabled(enabled);
}
}
void IpcVideoFrameCapturer::OnSharedMemoryRegionCreated(
int id,
base::ReadOnlySharedMemoryRegion region,
uint32_t size) {
auto shared_buffer =
base::MakeRefCounted<IpcSharedBufferCore>(id, std::move(region));
if (shared_buffer->memory() != nullptr &&
!shared_buffers_.insert(std::make_pair(id, shared_buffer)).second) {
LOG(ERROR) << "Duplicate shared buffer id " << id << " encountered";
}
}
void IpcVideoFrameCapturer::OnSharedMemoryRegionReleased(int id) {
// Drop the cached reference to the buffer.
shared_buffers_.erase(id);
}
void IpcVideoFrameCapturer::OnCaptureResult(mojom::CaptureResultPtr result) {
CHECK(pending_capture_frame_requests_)
<< "Received unexpected capture result.";
--pending_capture_frame_requests_;
if (result->is_capture_error()) {
callback_->OnCaptureResult(result->get_capture_error(), nullptr);
return;
}
// Assume that |desktop_frame| is well-formed because it was received from a
// more privileged process.
mojom::DesktopFramePtr& desktop_frame = result->get_desktop_frame();
scoped_refptr<IpcSharedBufferCore> shared_buffer_core =
GetSharedBufferCore(desktop_frame->shared_buffer_id);
CHECK(shared_buffer_core.get());
std::unique_ptr<webrtc::DesktopFrame> frame =
std::make_unique<webrtc::SharedMemoryDesktopFrame>(
desktop_frame->size, desktop_frame->stride,
new IpcSharedBuffer(shared_buffer_core));
frame->set_capture_time_ms(desktop_frame->capture_time_ms);
frame->set_dpi(desktop_frame->dpi);
frame->set_capturer_id(desktop_frame->capturer_id);
for (const auto& rect : desktop_frame->dirty_region) {
frame->mutable_updated_region()->AddRect(rect);
}
callback_->OnCaptureResult(webrtc::DesktopCapturer::Result::SUCCESS,
std::move(frame));
}
void IpcVideoFrameCapturer::OnDisconnect() {
shared_buffers_.clear();
// Reset the endpoints so that any further calls to CaptureFrame()
// do not try to send Mojo commands.
capturer_control_.reset();
event_handler_.reset();
// Generate fake responses to keep the frame scheduler in sync.
while (pending_capture_frame_requests_) {
OnCaptureResult(mojom::CaptureResult::NewCaptureError(
webrtc::DesktopCapturer::Result::ERROR_TEMPORARY));
}
}
scoped_refptr<IpcSharedBufferCore> IpcVideoFrameCapturer::GetSharedBufferCore(
int id) {
SharedBuffers::const_iterator i = shared_buffers_.find(id);
if (i != shared_buffers_.end()) {
return i->second;
} else {
LOG(ERROR) << "Failed to find the shared buffer " << id;
return nullptr;
}
}
} // namespace remoting
|