1/*
2 * libjingle
3 * Copyright 2011 Google Inc.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions are met:
7 *
8 *  1. Redistributions of source code must retain the above copyright notice,
9 *     this list of conditions and the following disclaimer.
10 *  2. Redistributions in binary form must reproduce the above copyright notice,
11 *     this list of conditions and the following disclaimer in the documentation
12 *     and/or other materials provided with the distribution.
13 *  3. The name of the author may not be used to endorse or promote products
14 *     derived from this software without specific prior written permission.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
17 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
18 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
19 * EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
20 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
21 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
22 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
23 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
24 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
25 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26 */
27
28// Implementation of CarbonVideoRenderer
29
30#include "talk/media/devices/carbonvideorenderer.h"
31
32#include "talk/media/base/videocommon.h"
33#include "talk/media/base/videoframe.h"
34#include "webrtc/base/logging.h"
35
36namespace cricket {
37
38CarbonVideoRenderer::CarbonVideoRenderer(int x, int y)
39    : image_width_(0),
40      image_height_(0),
41      x_(x),
42      y_(y),
43      window_ref_(NULL) {
44}
45
46CarbonVideoRenderer::~CarbonVideoRenderer() {
47  if (window_ref_) {
48    DisposeWindow(window_ref_);
49  }
50}
51
52// Called from the main event loop. All renderering needs to happen on
53// the main thread.
54OSStatus CarbonVideoRenderer::DrawEventHandler(EventHandlerCallRef handler,
55                                               EventRef event,
56                                               void* data) {
57  OSStatus status = noErr;
58  CarbonVideoRenderer* renderer = static_cast<CarbonVideoRenderer*>(data);
59  if (renderer != NULL) {
60    if (!renderer->DrawFrame()) {
61      LOG(LS_ERROR) << "Failed to draw frame.";
62    }
63  }
64  return status;
65}
66
67bool CarbonVideoRenderer::DrawFrame() {
68  // Grab the image lock to make sure it is not changed why we'll draw it.
69  rtc::CritScope cs(&image_crit_);
70
71  if (image_.get() == NULL) {
72    // Nothing to draw, just return.
73    return true;
74  }
75  int width = image_width_;
76  int height = image_height_;
77  CGDataProviderRef provider =
78      CGDataProviderCreateWithData(NULL, image_.get(), width * height * 4,
79                                   NULL);
80  CGColorSpaceRef color_space_ref = CGColorSpaceCreateDeviceRGB();
81  CGBitmapInfo bitmap_info = kCGBitmapByteOrderDefault;
82  CGColorRenderingIntent rendering_intent = kCGRenderingIntentDefault;
83  CGImageRef image_ref = CGImageCreate(width, height, 8, 32, width * 4,
84                                       color_space_ref, bitmap_info, provider,
85                                       NULL, false, rendering_intent);
86  CGDataProviderRelease(provider);
87
88  if (image_ref == NULL) {
89    return false;
90  }
91  CGContextRef context;
92  SetPortWindowPort(window_ref_);
93  if (QDBeginCGContext(GetWindowPort(window_ref_), &context) != noErr) {
94    CGImageRelease(image_ref);
95    return false;
96  }
97  Rect window_bounds;
98  GetWindowPortBounds(window_ref_, &window_bounds);
99
100  // Anchor the image to the top left corner.
101  int x = 0;
102  int y = window_bounds.bottom - CGImageGetHeight(image_ref);
103  CGRect dst_rect = CGRectMake(x, y, CGImageGetWidth(image_ref),
104                               CGImageGetHeight(image_ref));
105  CGContextDrawImage(context, dst_rect, image_ref);
106  CGContextFlush(context);
107  QDEndCGContext(GetWindowPort(window_ref_), &context);
108  CGImageRelease(image_ref);
109  return true;
110}
111
112bool CarbonVideoRenderer::SetSize(int width, int height, int reserved) {
113  if (width != image_width_ || height != image_height_) {
114    // Grab the image lock while changing its size.
115    rtc::CritScope cs(&image_crit_);
116    image_width_ = width;
117    image_height_ = height;
118    image_.reset(new uint8_t[width * height * 4]);
119    memset(image_.get(), 255, width * height * 4);
120  }
121  return true;
122}
123
124bool CarbonVideoRenderer::RenderFrame(const VideoFrame* video_frame) {
125  if (!video_frame) {
126    return false;
127  }
128  {
129    const VideoFrame* frame = video_frame->GetCopyWithRotationApplied();
130
131    if (!SetSize(frame->GetWidth(), frame->GetHeight(), 0)) {
132      return false;
133    }
134
135    // Grab the image lock so we are not trashing up the image being drawn.
136    rtc::CritScope cs(&image_crit_);
137    frame->ConvertToRgbBuffer(cricket::FOURCC_ABGR,
138                              image_.get(),
139                              frame->GetWidth() * frame->GetHeight() * 4,
140                              frame->GetWidth() * 4);
141  }
142
143  // Trigger a repaint event for the whole window.
144  Rect bounds;
145  InvalWindowRect(window_ref_, GetWindowPortBounds(window_ref_, &bounds));
146  return true;
147}
148
149bool CarbonVideoRenderer::Initialize() {
150  OSStatus err;
151  WindowAttributes attributes =
152      kWindowStandardDocumentAttributes |
153      kWindowLiveResizeAttribute |
154      kWindowFrameworkScaledAttribute |
155      kWindowStandardHandlerAttribute;
156
157  struct Rect bounds;
158  bounds.top = y_;
159  bounds.bottom = 480;
160  bounds.left = x_;
161  bounds.right = 640;
162  err = CreateNewWindow(kDocumentWindowClass, attributes,
163                        &bounds, &window_ref_);
164  if (!window_ref_ || err != noErr) {
165    LOG(LS_ERROR) << "CreateNewWindow failed, error code: " << err;
166    return false;
167  }
168  static const EventTypeSpec event_spec = {
169    kEventClassWindow,
170    kEventWindowDrawContent
171  };
172
173  err = InstallWindowEventHandler(
174      window_ref_,
175      NewEventHandlerUPP(CarbonVideoRenderer::DrawEventHandler),
176      GetEventTypeCount(event_spec),
177      &event_spec,
178      this,
179      NULL);
180  if (err != noErr) {
181    LOG(LS_ERROR) << "Failed to install event handler, error code: " << err;
182    return false;
183  }
184  SelectWindow(window_ref_);
185  ShowWindow(window_ref_);
186  return true;
187}
188
189}  // namespace cricket
190