Revert of Remove all reference to carbon api

webrtc/media/devices/carbonvideorenderer.cc

+/*
+ *  Copyright (c) 2011 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.
+ */
+
+// Implementation of CarbonVideoRenderer
+
+#include "webrtc/media/devices/carbonvideorenderer.h"
+
+#include "webrtc/base/logging.h"
+#include "webrtc/media/base/videocommon.h"
+#include "webrtc/media/base/videoframe.h"
+
+namespace cricket {
+
+CarbonVideoRenderer::CarbonVideoRenderer(int x, int y)
+    : image_width_(0),
+      image_height_(0),
+      x_(x),
+      y_(y),
+      window_ref_(NULL) {
+}
+
+CarbonVideoRenderer::~CarbonVideoRenderer() {
+  if (window_ref_) {
+    DisposeWindow(window_ref_);
+  }
+}
+
+// Called from the main event loop. All renderering needs to happen on
+// the main thread.
+OSStatus CarbonVideoRenderer::DrawEventHandler(EventHandlerCallRef handler,
+                                               EventRef event,
+                                               void* data) {
+  OSStatus status = noErr;
+  CarbonVideoRenderer* renderer = static_cast<CarbonVideoRenderer*>(data);
+  if (renderer != NULL) {
+    if (!renderer->DrawFrame()) {
+      LOG(LS_ERROR) << "Failed to draw frame.";
+    }
+  }
+  return status;
+}
+
+bool CarbonVideoRenderer::DrawFrame() {
+  // Grab the image lock to make sure it is not changed why we'll draw it.
+  rtc::CritScope cs(&image_crit_);
+
+  if (image_.get() == NULL) {
+    // Nothing to draw, just return.
+    return true;
+  }
+  int width = image_width_;
+  int height = image_height_;
+  CGDataProviderRef provider =
+      CGDataProviderCreateWithData(NULL, image_.get(), width * height * 4,
+                                   NULL);
+  CGColorSpaceRef color_space_ref = CGColorSpaceCreateDeviceRGB();
+  CGBitmapInfo bitmap_info = kCGBitmapByteOrderDefault;
+  CGColorRenderingIntent rendering_intent = kCGRenderingIntentDefault;
+  CGImageRef image_ref = CGImageCreate(width, height, 8, 32, width * 4,
+                                       color_space_ref, bitmap_info, provider,
+                                       NULL, false, rendering_intent);
+  CGDataProviderRelease(provider);
+
+  if (image_ref == NULL) {
+    return false;
+  }
+  CGContextRef context;
+  SetPortWindowPort(window_ref_);
+  if (QDBeginCGContext(GetWindowPort(window_ref_), &context) != noErr) {
+    CGImageRelease(image_ref);
+    return false;
+  }
+  Rect window_bounds;
+  GetWindowPortBounds(window_ref_, &window_bounds);
+
+  // Anchor the image to the top left corner.
+  int x = 0;
+  int y = window_bounds.bottom - CGImageGetHeight(image_ref);
+  CGRect dst_rect = CGRectMake(x, y, CGImageGetWidth(image_ref),
+                               CGImageGetHeight(image_ref));
+  CGContextDrawImage(context, dst_rect, image_ref);
+  CGContextFlush(context);
+  QDEndCGContext(GetWindowPort(window_ref_), &context);
+  CGImageRelease(image_ref);
+  return true;
+}
+
+bool CarbonVideoRenderer::SetSize(int width, int height) {
+  if (width != image_width_ || height != image_height_) {
+    // Grab the image lock while changing its size.
+    rtc::CritScope cs(&image_crit_);
+    image_width_ = width;
+    image_height_ = height;
+    image_.reset(new uint8_t[width * height * 4]);
+    memset(image_.get(), 255, width * height * 4);
+  }
+  return true;
+}
+
+void CarbonVideoRenderer::OnFrame(const VideoFrame& video_frame) {
+  {
+    const cricket::WebRtcVideoFrame frame(
+        webrtc::I420Buffer::Rotate(video_frame.video_frame_buffer(),
+                                   video_frame.rotation()),
+        webrtc::kVideoRotation_0, video_frame.timestamp_us());
+
+    if (!SetSize(frame.width(), frame.height())) {
+      return false;
+    }
+
+    // Grab the image lock so we are not trashing up the image being drawn.
+    rtc::CritScope cs(&image_crit_);
+    frame.ConvertToRgbBuffer(cricket::FOURCC_ABGR,
+                             image_.get(),
+                             static_cast<size_t>(frame.width()) *
+                                 frame.height() * 4,
+                             frame.width() * 4);
+  }
+
+  // Trigger a repaint event for the whole window.
+  Rect bounds;
+  InvalWindowRect(window_ref_, GetWindowPortBounds(window_ref_, &bounds));
+  return true;
+}
+
+bool CarbonVideoRenderer::Initialize() {
+  OSStatus err;
+  WindowAttributes attributes =
+      kWindowStandardDocumentAttributes |
+      kWindowLiveResizeAttribute |
+      kWindowFrameworkScaledAttribute |
+      kWindowStandardHandlerAttribute;
+
+  struct Rect bounds;
+  bounds.top = y_;
+  bounds.bottom = 480;
+  bounds.left = x_;
+  bounds.right = 640;
+  err = CreateNewWindow(kDocumentWindowClass, attributes,
+                        &bounds, &window_ref_);
+  if (!window_ref_ || err != noErr) {
+    LOG(LS_ERROR) << "CreateNewWindow failed, error code: " << err;
+    return false;
+  }
+  static const EventTypeSpec event_spec = {
+    kEventClassWindow,
+    kEventWindowDrawContent
+  };
+
+  err = InstallWindowEventHandler(
+      window_ref_,
+      NewEventHandlerUPP(CarbonVideoRenderer::DrawEventHandler),
+      GetEventTypeCount(event_spec),
+      &event_spec,
+      this,
+      NULL);
+  if (err != noErr) {
+    LOG(LS_ERROR) << "Failed to install event handler, error code: " << err;
+    return false;
+  }
+  SelectWindow(window_ref_);
+  ShowWindow(window_ref_);
+  return true;
+}
+
+}  // namespace cricket