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/*
* libjingle
* Copyright 2011 Google Inc.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* 3. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
* EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
// Implementation of CarbonVideoRenderer
#include "talk/media/devices/carbonvideorenderer.h"
#include "talk/media/base/videocommon.h"
#include "talk/media/base/videoframe.h"
#include "webrtc/base/logging.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, int reserved) {
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;
}
bool CarbonVideoRenderer::RenderFrame(const VideoFrame* video_frame) {
if (!video_frame) {
return false;
}
{
const VideoFrame* frame = video_frame->GetCopyWithRotationApplied();
if (!SetSize(frame->GetWidth(), frame->GetHeight(), 0)) {
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(),
frame->GetWidth() * frame->GetHeight() * 4,
frame->GetWidth() * 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
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