void RenderVideo::imageChanged(WrappedImagePtr newImage, const IntRect* rect)
{
RenderMedia::imageChanged(newImage, rect);
// Cache the image intrinsic size so we can continue to use it to draw the image correctly
// even if we know the video intrinsic size but aren't able to draw video frames yet
// (we don't want to scale the poster to the video size without keeping aspect ratio).
if (videoElement()->shouldDisplayPosterImage())
m_cachedImageSize = intrinsicSize();
// The intrinsic size is now that of the image, but in case we already had the
// intrinsic size of the video we call this here to restore the video size.
updateIntrinsicSize();
}
LayoutSize RenderVideo::calculateIntrinsicSize()
{
HTMLVideoElement* video = videoElement();
// Spec text from 4.8.6
//
// The intrinsic width of a video element's playback area is the intrinsic width
// of the video resource, if that is available; otherwise it is the intrinsic
// width of the poster frame, if that is available; otherwise it is 300 CSS pixels.
//
// The intrinsic height of a video element's playback area is the intrinsic height
// of the video resource, if that is available; otherwise it is the intrinsic
// height of the poster frame, if that is available; otherwise it is 150 CSS pixels.
MediaPlayer* player = mediaElement()->player();
if (player && video->readyState() >= HTMLVideoElement::HAVE_METADATA) {
LayoutSize size = player->naturalSize();
if (!size.isEmpty())
return size;
}
if (video->shouldDisplayPosterImage() && !m_cachedImageSize.isEmpty() && !imageResource()->errorOccurred())
return m_cachedImageSize;
// When the natural size of the video is unavailable, we use the provided
// width and height attributes of the video element as the intrinsic size until
// better values become available.
if (video->hasAttribute(widthAttr) && video->hasAttribute(heightAttr))
return LayoutSize(video->width(), video->height());
// <video> in standalone media documents should not use the default 300x150
// size since they also have audio-only files. By setting the intrinsic
// size to 300x1 the video will resize itself in these cases, and audio will
// have the correct height (it needs to be > 0 for controls to render properly).
if (video->ownerDocument() && video->ownerDocument()->isMediaDocument())
return LayoutSize(defaultSize().width(), 1);
return defaultSize();
}
bool RenderVideo::shouldDisplayVideo() const
{
return !videoElement()->shouldDisplayPosterImage();
}
bool MediaNode::link()
{
// Rewire everything
if ((description() & AudioSource)) {
if (!linkMediaNodeList(m_audioSinkList, root()->audioGraph(), m_audioTee, m_fakeAudioSink, audioElement()))
return false;
}
if ((description() & VideoSource)) {
if (!linkMediaNodeList(m_videoSinkList, root()->videoGraph(), m_videoTee, m_fakeVideoSink, videoElement()))
return false;
}
return true;
}
