Home | History | Annotate | Download | only in devices 
      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 
     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 
     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.
     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 
     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 
    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 
    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 
    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