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
36 namespace cricket {
37
CarbonVideoRenderer(int x,int y)38 CarbonVideoRenderer::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
~CarbonVideoRenderer()46 CarbonVideoRenderer::~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.
DrawEventHandler(EventHandlerCallRef handler,EventRef event,void * data)54 OSStatus 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
DrawFrame()67 bool 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
SetSize(int width,int height,int reserved)112 bool 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
RenderFrame(const VideoFrame * video_frame)124 bool 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
Initialize()149 bool 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