Move ContentVideoCaptureDeviceCore from src/content to src/media

media/capture/screen_capture_device_core.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 "media/capture/screen_capture_device_core.h"
+
+#include "base/bind.h"
+#include "base/logging.h"
+#include "base/memory/scoped_ptr.h"
+#include "base/memory/weak_ptr.h"
+#include "base/strings/string_number_conversions.h"
+#include "base/strings/stringprintf.h"
+#include "base/threading/thread_checker.h"
+
+namespace media {
+
+namespace {
+
+void DeleteCaptureMachine(
+    scoped_ptr<VideoCaptureMachine> capture_machine) {
+  capture_machine.reset();
+}
+
+}  // namespace
+
+void ScreenCaptureDeviceCore::AllocateAndStart(
+    const VideoCaptureParams& params,
+    scoped_ptr<VideoCaptureDevice::Client> client) {
+  DCHECK(thread_checker_.CalledOnValidThread());
+
+  if (state_ != kIdle) {
+    DVLOG(1) << "Allocate() invoked when not in state Idle.";
+    return;
+  }
+
+  if (params.requested_format.frame_rate <= 0) {
+    std::string error_msg("Invalid frame_rate: ");
+    error_msg += base::DoubleToString(params.requested_format.frame_rate);
+    DVLOG(1) << error_msg;
+    client->OnError(error_msg);
+    return;
+  }
+
+  if (params.requested_format.pixel_format != PIXEL_FORMAT_I420 &&
+      params.requested_format.pixel_format != PIXEL_FORMAT_TEXTURE) {
+    std::string error_msg = base::StringPrintf(
+        "unsupported format: %d", params.requested_format.pixel_format);
+    DVLOG(1) << error_msg;
+    client->OnError(error_msg);
+    return;
+  }
+
+  if (params.requested_format.frame_size.IsEmpty()) {
+    std::string error_msg =
+        "invalid frame size: " + params.requested_format.frame_size.ToString();
+    DVLOG(1) << error_msg;
+    client->OnError(error_msg);
+    return;
+  }
+
+  oracle_proxy_ = new ThreadSafeCaptureOracle(client.Pass(), params);
+
+  capture_machine_->Start(
+      oracle_proxy_,
+      params,
+      base::Bind(&ScreenCaptureDeviceCore::CaptureStarted, AsWeakPtr()));
+
+  TransitionStateTo(kCapturing);
+}
+
+void ScreenCaptureDeviceCore::StopAndDeAllocate() {
+  DCHECK(thread_checker_.CalledOnValidThread());
+
+  if (state_ != kCapturing)
+    return;
+
+  oracle_proxy_->Stop();
+  oracle_proxy_ = NULL;
+
+  TransitionStateTo(kIdle);
+
+  capture_machine_->Stop(base::Bind(&base::DoNothing));
+}
+
+void ScreenCaptureDeviceCore::CaptureStarted(bool success) {
+  DCHECK(thread_checker_.CalledOnValidThread());
+  if (!success) {
+    std::string reason("Failed to start capture machine.");
+    DVLOG(1) << reason;
+    Error(reason);
+  }
+}
+
+ScreenCaptureDeviceCore::ScreenCaptureDeviceCore(
+    scoped_ptr<VideoCaptureMachine> capture_machine)
+    : state_(kIdle),
+      capture_machine_(capture_machine.Pass()) {
+  DCHECK(capture_machine_.get());
+}
+
+ScreenCaptureDeviceCore::~ScreenCaptureDeviceCore() {
+  DCHECK(thread_checker_.CalledOnValidThread());
+  DCHECK_NE(state_, kCapturing);
+  if (capture_machine_) {
+    capture_machine_->Stop(base::Bind(&DeleteCaptureMachine,
+                           base::Passed(&capture_machine_)));
+  }
+  DVLOG(1) << "ScreenCaptureDeviceCore@" << this << " destroying.";
+}
+
+void ScreenCaptureDeviceCore::TransitionStateTo(State next_state) {
+  DCHECK(thread_checker_.CalledOnValidThread());
+
+#ifndef NDEBUG
+  static const char* kStateNames[] = {
+    "Idle", "Allocated", "Capturing", "Error"
+  };
+  DVLOG(1) << "State change: " << kStateNames[state_]
+           << " --> " << kStateNames[next_state];
+#endif
+
+  state_ = next_state;
+}
+
+void ScreenCaptureDeviceCore::Error(const std::string& reason) {
+  DCHECK(thread_checker_.CalledOnValidThread());
+
+  if (state_ == kIdle)
+    return;
+
+  if (oracle_proxy_.get())
+    oracle_proxy_->ReportError(reason);
+
+  StopAndDeAllocate();
+  TransitionStateTo(kError);
+}
+
+}  // namespace media