Move and rename host/cast_video_capture_adapter to protocol/webrtc_video_capture_adapter

remoting/host/cast_video_capturer_adapter.cc

-// Copyright 2014 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-#include "remoting/host/cast_video_capturer_adapter.h"
-
-#include "third_party/webrtc/modules/desktop_capture/desktop_frame.h"
-
-namespace remoting {
-
-// Number of frames to be captured per second.
-const int kFramesPerSec = 10;
-
-CastVideoCapturerAdapter::CastVideoCapturerAdapter(
-    scoped_ptr<webrtc::DesktopCapturer> capturer)
-    : desktop_capturer_(capturer.Pass()) {
-  DCHECK(desktop_capturer_);
-
-  thread_checker_.DetachFromThread();
-
-  // Disable video adaptation since we don't intend to use it.
-  set_enable_video_adapter(false);
-}
-
-CastVideoCapturerAdapter::~CastVideoCapturerAdapter() {
-  DCHECK(!capture_timer_);
-}
-
-webrtc::SharedMemory* CastVideoCapturerAdapter::CreateSharedMemory(
-    size_t size) {
-  return nullptr;
-}
-
-void CastVideoCapturerAdapter::OnCaptureCompleted(webrtc::DesktopFrame* frame) {
-  scoped_ptr<webrtc::DesktopFrame> owned_frame(frame);
-
-  // Drop the owned_frame if there were no changes.
-  if (!owned_frame || owned_frame->updated_region().is_empty()) {
-    owned_frame.reset();
-    return;
-  }
-
-  // Convert the webrtc::DesktopFrame to a cricket::CapturedFrame.
-  cricket::CapturedFrame captured_frame;
-  captured_frame.width = owned_frame->size().width();
-  captured_frame.height = owned_frame->size().height();
-  base::TimeTicks current_time = base::TimeTicks::Now();
-  captured_frame.time_stamp =
-      current_time.ToInternalValue() * base::Time::kNanosecondsPerMicrosecond;
-  captured_frame.data = owned_frame->data();
-
-  // The data_size attribute must be set. If multiple formats are supported,
-  // this should be set appropriately for each one.
-  captured_frame.data_size =
-      (captured_frame.width * webrtc::DesktopFrame::kBytesPerPixel * 8 + 7) /
-      8 * captured_frame.height;
-  captured_frame.fourcc = cricket::FOURCC_ARGB;
-
-  SignalFrameCaptured(this, &captured_frame);
-}
-
-bool CastVideoCapturerAdapter::GetBestCaptureFormat(
-    const cricket::VideoFormat& desired,
-    cricket::VideoFormat* best_format) {
-  DCHECK(thread_checker_.CalledOnValidThread());
-
-  // For now, just used the desired width and height.
-  best_format->width = desired.width;
-  best_format->height = desired.height;
-  best_format->fourcc = cricket::FOURCC_ARGB;
-  best_format->interval = FPS_TO_INTERVAL(kFramesPerSec);
-  return true;
-}
-
-cricket::CaptureState CastVideoCapturerAdapter::Start(
-    const cricket::VideoFormat& capture_format) {
-  DCHECK(thread_checker_.CalledOnValidThread());
-  DCHECK(!capture_timer_);
-  DCHECK_EQ(capture_format.fourcc, (static_cast<uint32>(cricket::FOURCC_ARGB)));
-
-  if (!desktop_capturer_) {
-    VLOG(1) << "CastVideoCapturerAdapter failed to start.";
-    return cricket::CS_FAILED;
-  }
-
-  // This is required to tell the cricket::VideoCapturer base class what the
-  // capture format will be.
-  SetCaptureFormat(&capture_format);
-
-  desktop_capturer_->Start(this);
-
-  capture_timer_.reset(new base::RepeatingTimer());
-  capture_timer_->Start(FROM_HERE,
-                        base::TimeDelta::FromMicroseconds(
-                            GetCaptureFormat()->interval /
-                            (base::Time::kNanosecondsPerMicrosecond)),
-                        this,
-                        &CastVideoCapturerAdapter::CaptureNextFrame);
-
-  return cricket::CS_RUNNING;
-}
-
-// Similar to the base class implementation with some important differences:
-// 1. Does not call either Stop() or Start(), as those would affect the state of
-// |desktop_capturer_|.
-// 2. Does not support unpausing after stopping the capturer. It is unclear
-// if that flow needs to be supported.
-bool CastVideoCapturerAdapter::Pause(bool pause) {
-  DCHECK(thread_checker_.CalledOnValidThread());
-
-  if (pause) {
-    if (capture_state() == cricket::CS_PAUSED)
-      return true;
-
-    bool running = capture_state() == cricket::CS_STARTING ||
-                   capture_state() == cricket::CS_RUNNING;
-
-    DCHECK_EQ(running, IsRunning());
-
-    if (!running) {
-      LOG(ERROR)
-          << "Cannot pause CastVideoCapturerAdapter.";
-      return false;
-    }
-
-    // Stop |capture_timer_| and set capture state to cricket::CS_PAUSED.
-    capture_timer_->Stop();
-    SetCaptureState(cricket::CS_PAUSED);
-
-    VLOG(1) << "CastVideoCapturerAdapter paused.";
-
-    return true;
-  } else {  // Unpausing.
-    if (capture_state() != cricket::CS_PAUSED || !GetCaptureFormat() ||
-        !capture_timer_) {
-      LOG(ERROR) << "Cannot unpause CastVideoCapturerAdapter.";
-      return false;
-    }
-
-    // Restart |capture_timer_| and set capture state to cricket::CS_RUNNING;
-    capture_timer_->Start(FROM_HERE,
-                          base::TimeDelta::FromMicroseconds(
-                              GetCaptureFormat()->interval /
-                              (base::Time::kNanosecondsPerMicrosecond)),
-                          this,
-                          &CastVideoCapturerAdapter::CaptureNextFrame);
-    SetCaptureState(cricket::CS_RUNNING);
-
-    VLOG(1) << "CastVideoCapturerAdapter unpaused.";
-  }
-  return true;
-}
-
-void CastVideoCapturerAdapter::Stop() {
-  DCHECK(thread_checker_.CalledOnValidThread());
-  DCHECK_NE(capture_state(), cricket::CS_STOPPED);
-
-  capture_timer_.reset();
-
-  SetCaptureFormat(nullptr);
-  SetCaptureState(cricket::CS_STOPPED);
-
-  VLOG(1) << "CastVideoCapturerAdapter stopped.";
-}
-
-
-bool CastVideoCapturerAdapter::IsRunning() {
-  DCHECK(thread_checker_.CalledOnValidThread());
-
-  return capture_timer_->IsRunning();
-}
-
-bool CastVideoCapturerAdapter::IsScreencast() const {
-  return true;
-}
-
-bool CastVideoCapturerAdapter::GetPreferredFourccs(
-    std::vector<uint32>* fourccs) {
-  DCHECK(thread_checker_.CalledOnValidThread());
-  if (!fourccs)
-    return false;
-  fourccs->push_back(cricket::FOURCC_ARGB);
-  return true;
-}
-
-void CastVideoCapturerAdapter::CaptureNextFrame() {
-  // If we are paused, then don't capture.
-  if (!IsRunning())
-    return;
-
-  desktop_capturer_->Capture(webrtc::DesktopRegion());
-}
-
-}  // namespace remoting
-