1 // libjingle 2 // Copyright 2011 Google Inc. 3 // 4 // Redistribution and use in source and binary forms, with or without 5 // modification, are permitted provided that the following conditions are met: 6 // 7 // 1. Redistributions of source code must retain the above copyright notice, 8 // this list of conditions and the following disclaimer. 9 // 2. Redistributions in binary form must reproduce the above copyright notice, 10 // this list of conditions and the following disclaimer in the documentation 11 // and/or other materials provided with the distribution. 12 // 3. The name of the author may not be used to endorse or promote products 13 // derived from this software without specific prior written permission. 14 // 15 // THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED 16 // WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 17 // MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO 18 // EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 19 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 20 // PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; 21 // OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, 22 // WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR 23 // OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF 24 // ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 25 // 26 // Implementation of CarbonVideoRenderer 27 28 #include "talk/media/devices/carbonvideorenderer.h" 29 30 #include "talk/base/logging.h" 31 #include "talk/media/base/videocommon.h" 32 #include "talk/media/base/videoframe.h" 33 34 namespace cricket { 35 36 CarbonVideoRenderer::CarbonVideoRenderer(int x, int y) 37 : image_width_(0), 38 image_height_(0), 39 x_(x), 40 y_(y), 41 image_ref_(NULL), 42 window_ref_(NULL) { 43 } 44 45 CarbonVideoRenderer::~CarbonVideoRenderer() { 46 if (window_ref_) { 47 DisposeWindow(window_ref_); 48 } 49 } 50 51 // Called from the main event loop. All renderering needs to happen on 52 // the main thread. 53 OSStatus CarbonVideoRenderer::DrawEventHandler(EventHandlerCallRef handler, 54 EventRef event, 55 void* data) { 56 OSStatus status = noErr; 57 CarbonVideoRenderer* renderer = static_cast<CarbonVideoRenderer*>(data); 58 if (renderer != NULL) { 59 if (!renderer->DrawFrame()) { 60 LOG(LS_ERROR) << "Failed to draw frame."; 61 } 62 } 63 return status; 64 } 65 66 bool CarbonVideoRenderer::DrawFrame() { 67 // Grab the image lock to make sure it is not changed why we'll draw it. 68 talk_base::CritScope cs(&image_crit_); 69 70 if (image_.get() == NULL) { 71 // Nothing to draw, just return. 72 return true; 73 } 74 int width = image_width_; 75 int height = image_height_; 76 CGDataProviderRef provider = 77 CGDataProviderCreateWithData(NULL, image_.get(), width * height * 4, 78 NULL); 79 CGColorSpaceRef color_space_ref = CGColorSpaceCreateDeviceRGB(); 80 CGBitmapInfo bitmap_info = kCGBitmapByteOrderDefault; 81 CGColorRenderingIntent rendering_intent = kCGRenderingIntentDefault; 82 CGImageRef image_ref = CGImageCreate(width, height, 8, 32, width * 4, 83 color_space_ref, bitmap_info, provider, 84 NULL, false, rendering_intent); 85 CGDataProviderRelease(provider); 86 87 if (image_ref == NULL) { 88 return false; 89 } 90 CGContextRef context; 91 SetPortWindowPort(window_ref_); 92 if (QDBeginCGContext(GetWindowPort(window_ref_), &context) != noErr) { 93 CGImageRelease(image_ref); 94 return false; 95 } 96 Rect window_bounds; 97 GetWindowPortBounds(window_ref_, &window_bounds); 98 99 // Anchor the image to the top left corner. 100 int x = 0; 101 int y = window_bounds.bottom - CGImageGetHeight(image_ref); 102 CGRect dst_rect = CGRectMake(x, y, CGImageGetWidth(image_ref), 103 CGImageGetHeight(image_ref)); 104 CGContextDrawImage(context, dst_rect, image_ref); 105 CGContextFlush(context); 106 QDEndCGContext(GetWindowPort(window_ref_), &context); 107 CGImageRelease(image_ref); 108 return true; 109 } 110 111 bool CarbonVideoRenderer::SetSize(int width, int height, int reserved) { 112 if (width != image_width_ || height != image_height_) { 113 // Grab the image lock while changing its size. 114 talk_base::CritScope cs(&image_crit_); 115 image_width_ = width; 116 image_height_ = height; 117 image_.reset(new uint8[width * height * 4]); 118 memset(image_.get(), 255, width * height * 4); 119 } 120 return true; 121 } 122 123 bool CarbonVideoRenderer::RenderFrame(const VideoFrame* frame) { 124 if (!frame) { 125 return false; 126 } 127 { 128 // Grab the image lock so we are not trashing up the image being drawn. 129 talk_base::CritScope cs(&image_crit_); 130 frame->ConvertToRgbBuffer(cricket::FOURCC_ABGR, 131 image_.get(), 132 frame->GetWidth() * frame->GetHeight() * 4, 133 frame->GetWidth() * 4); 134 } 135 136 // Trigger a repaint event for the whole window. 137 Rect bounds; 138 InvalWindowRect(window_ref_, GetWindowPortBounds(window_ref_, &bounds)); 139 return true; 140 } 141 142 bool CarbonVideoRenderer::Initialize() { 143 OSStatus err; 144 WindowAttributes attributes = 145 kWindowStandardDocumentAttributes | 146 kWindowLiveResizeAttribute | 147 kWindowFrameworkScaledAttribute | 148 kWindowStandardHandlerAttribute; 149 150 struct Rect bounds; 151 bounds.top = y_; 152 bounds.bottom = 480; 153 bounds.left = x_; 154 bounds.right = 640; 155 err = CreateNewWindow(kDocumentWindowClass, attributes, 156 &bounds, &window_ref_); 157 if (!window_ref_ || err != noErr) { 158 LOG(LS_ERROR) << "CreateNewWindow failed, error code: " << err; 159 return false; 160 } 161 static const EventTypeSpec event_spec = { 162 kEventClassWindow, 163 kEventWindowDrawContent 164 }; 165 166 err = InstallWindowEventHandler( 167 window_ref_, 168 NewEventHandlerUPP(CarbonVideoRenderer::DrawEventHandler), 169 GetEventTypeCount(event_spec), 170 &event_spec, 171 this, 172 NULL); 173 if (err != noErr) { 174 LOG(LS_ERROR) << "Failed to install event handler, error code: " << err; 175 return false; 176 } 177 SelectWindow(window_ref_); 178 ShowWindow(window_ref_); 179 return true; 180 } 181 182 } // namespace cricket 183