MediaPlayer::SupportsType MediaPlayer::supportsType(const MediaEngineSupportParameters& parameters, const MediaPlayerSupportsTypeClient* client)
{
// 4.8.10.3 MIME types - The canPlayType(type) method must return the empty string if type is a type that the
// user agent knows it cannot render or is the type "application/octet-stream"
if (parameters.type == applicationOctetStream())
return IsNotSupported;
const MediaPlayerFactory* engine = bestMediaEngineForSupportParameters(parameters);
if (!engine)
return IsNotSupported;
#if PLATFORM(COCOA)
// YouTube will ask if the HTMLMediaElement canPlayType video/webm, then
// video/x-flv, then finally video/mp4, and will then load a URL of the first type
// in that list which returns "probably". When Perian is installed,
// MediaPlayerPrivateQTKit claims to support both video/webm and video/x-flv, but
// due to a bug in Perian, loading media in these formats will sometimes fail on
// slow connections. <https://bugs.webkit.org/show_bug.cgi?id=86409>
if (client && client->mediaPlayerNeedsSiteSpecificHacks()) {
String host = client->mediaPlayerDocumentHost();
if ((host.endsWith(".youtube.com", false) || equalIgnoringCase("youtube.com", host))
&& (parameters.type.startsWith("video/webm", false) || parameters.type.startsWith("video/x-flv", false)))
return IsNotSupported;
}
#else
UNUSED_PARAM(client);
#endif
return engine->supportsTypeAndCodecs(parameters);
}
MediaPlayerFactory* MediaPlayer::nextBestMediaEngine(MediaPlayerFactory* current) const
{
MediaEngineSupportParameters parameters;
parameters.type = m_contentMIMEType;
parameters.codecs = m_contentTypeCodecs;
parameters.url = m_url;
#if ENABLE(ENCRYPTED_MEDIA)
parameters.keySystem = m_keySystem;
#endif
#if ENABLE(MEDIA_SOURCE)
parameters.isMediaSource = !!m_mediaSource;
#endif
return bestMediaEngineForSupportParameters(parameters, current);
}