void MediaSource::setDuration(double duration, ExceptionCode& ec)
{
// 2.1 Attributes - Duration
// https://dvcs.w3.org/hg/html-media/raw-file/tip/media-source/media-source.html#attributes
// On setting, run the following steps:
// 1. If the value being set is negative or NaN then throw an INVALID_ACCESS_ERR exception and abort these steps.
if (duration < 0.0 || std::isnan(duration)) {
ec = INVALID_ACCESS_ERR;
return;
}
// 2. If the readyState attribute is not "open" then throw an INVALID_STATE_ERR exception and abort these steps.
if (!isOpen()) {
ec = INVALID_STATE_ERR;
return;
}
// 3. If the updating attribute equals true on any SourceBuffer in sourceBuffers, then throw an INVALID_STATE_ERR
// exception and abort these steps.
for (auto& sourceBuffer : *m_sourceBuffers) {
if (sourceBuffer->updating()) {
ec = INVALID_STATE_ERR;
return;
}
}
// 4. Run the duration change algorithm with new duration set to the value being assigned to this attribute.
setDurationInternal(MediaTime::createWithDouble(duration));
}
void MediaSource::streamEndedWithError(Optional<EndOfStreamError> error)
{
LOG(MediaSource, "MediaSource::streamEndedWithError(%p)", this);
// 2.4.7 https://dvcs.w3.org/hg/html-media/raw-file/tip/media-source/media-source.html#end-of-stream-algorithm
// 1. Change the readyState attribute value to "ended".
// 2. Queue a task to fire a simple event named sourceended at the MediaSource.
setReadyState(endedKeyword());
// 3.
if (!error) {
// ↳ If error is not set, is null, or is an empty string
// 1. Run the duration change algorithm with new duration set to the highest end time reported by
// the buffered attribute across all SourceBuffer objects in sourceBuffers.
MediaTime maxEndTime;
for (auto& sourceBuffer : *m_sourceBuffers) {
if (auto length = sourceBuffer->buffered()->length())
maxEndTime = std::max(sourceBuffer->buffered()->ranges().end(length - 1), maxEndTime);
}
setDurationInternal(maxEndTime);
// 2. Notify the media element that it now has all of the media data.
m_private->markEndOfStream(MediaSourcePrivate::EosNoError);
} else if (error == EndOfStreamError::Network) {
// ↳ If error is set to "network"
ASSERT(m_mediaElement);
if (m_mediaElement->readyState() == HTMLMediaElement::HAVE_NOTHING) {
// ↳ If the HTMLMediaElement.readyState attribute equals HAVE_NOTHING
// Run the "If the media data cannot be fetched at all, due to network errors, causing
// the user agent to give up trying to fetch the resource" steps of the resource fetch algorithm.
// NOTE: This step is handled by HTMLMediaElement::mediaLoadingFailed().
m_mediaElement->mediaLoadingFailed(MediaPlayer::NetworkError);
} else {
// ↳ If the HTMLMediaElement.readyState attribute is greater than HAVE_NOTHING
// Run the "If the connection is interrupted after some media data has been received, causing the
// user agent to give up trying to fetch the resource" steps of the resource fetch algorithm.
// NOTE: This step is handled by HTMLMediaElement::mediaLoadingFailedFatally().
m_mediaElement->mediaLoadingFailedFatally(MediaPlayer::NetworkError);
}
} else {
// ↳ If error is set to "decode"
ASSERT(error == EndOfStreamError::Decode);
ASSERT(m_mediaElement);
if (m_mediaElement->readyState() == HTMLMediaElement::HAVE_NOTHING) {
// ↳ If the HTMLMediaElement.readyState attribute equals HAVE_NOTHING
// Run the "If the media data can be fetched but is found by inspection to be in an unsupported
// format, or can otherwise not be rendered at all" steps of the resource fetch algorithm.
// NOTE: This step is handled by HTMLMediaElement::mediaLoadingFailed().
m_mediaElement->mediaLoadingFailed(MediaPlayer::FormatError);
} else {
// ↳ If the HTMLMediaElement.readyState attribute is greater than HAVE_NOTHING
// Run the media data is corrupted steps of the resource fetch algorithm.
// NOTE: This step is handled by HTMLMediaElement::mediaLoadingFailedFatally().
m_mediaElement->mediaLoadingFailedFatally(MediaPlayer::DecodeError);
}
}
}
void MediaSource::streamEndedWithError(const AtomicString& error, ExceptionCode& ec)
{
DEPRECATED_DEFINE_STATIC_LOCAL(const AtomicString, network, ("network", AtomicString::ConstructFromLiteral));
DEPRECATED_DEFINE_STATIC_LOCAL(const AtomicString, decode, ("decode", AtomicString::ConstructFromLiteral));
LOG(MediaSource, "MediaSource::streamEndedWithError(%p) : %s", this, error.string().ascii().data());
// 2.4.7 https://dvcs.w3.org/hg/html-media/raw-file/tip/media-source/media-source.html#end-of-stream-algorithm
// 3.
if (error.isEmpty()) {
// ↳ If error is not set, is null, or is an empty string
// 1. Run the duration change algorithm with new duration set to the highest end time reported by
// the buffered attribute across all SourceBuffer objects in sourceBuffers.
MediaTime maxEndTime;
for (auto& sourceBuffer : *m_sourceBuffers) {
if (auto length = sourceBuffer->buffered()->length())
maxEndTime = std::max(sourceBuffer->buffered()->ranges().end(length - 1), maxEndTime);
}
setDurationInternal(maxEndTime);
// 2. Notify the media element that it now has all of the media data.
m_private->markEndOfStream(MediaSourcePrivate::EosNoError);
}
// NOTE: Do steps 1 & 2 after step 3 (with an empty error) to avoid the MediaSource's readyState being re-opened by a
// remove() operation resulting from a duration change.
// FIXME: Re-number or update this section once <https://www.w3.org/Bugs/Public/show_bug.cgi?id=26316> is resolved.
// 1. Change the readyState attribute value to "ended".
// 2. Queue a task to fire a simple event named sourceended at the MediaSource.
setReadyState(endedKeyword());
if (error == network) {
// ↳ If error is set to "network"
ASSERT(m_mediaElement);
if (m_mediaElement->readyState() == HTMLMediaElement::HAVE_NOTHING) {
// ↳ If the HTMLMediaElement.readyState attribute equals HAVE_NOTHING
// Run the "If the media data cannot be fetched at all, due to network errors, causing
// the user agent to give up trying to fetch the resource" steps of the resource fetch algorithm.
// NOTE: This step is handled by HTMLMediaElement::mediaLoadingFailed().
m_mediaElement->mediaLoadingFailed(MediaPlayer::NetworkError);
} else {
// ↳ If the HTMLMediaElement.readyState attribute is greater than HAVE_NOTHING
// Run the "If the connection is interrupted after some media data has been received, causing the
// user agent to give up trying to fetch the resource" steps of the resource fetch algorithm.
// NOTE: This step is handled by HTMLMediaElement::mediaLoadingFailedFatally().
m_mediaElement->mediaLoadingFailedFatally(MediaPlayer::NetworkError);
}
} else if (error == decode) {
// ↳ If error is set to "decode"
ASSERT(m_mediaElement);
if (m_mediaElement->readyState() == HTMLMediaElement::HAVE_NOTHING) {
// ↳ If the HTMLMediaElement.readyState attribute equals HAVE_NOTHING
// Run the "If the media data can be fetched but is found by inspection to be in an unsupported
// format, or can otherwise not be rendered at all" steps of the resource fetch algorithm.
// NOTE: This step is handled by HTMLMediaElement::mediaLoadingFailed().
m_mediaElement->mediaLoadingFailed(MediaPlayer::FormatError);
} else {
// ↳ If the HTMLMediaElement.readyState attribute is greater than HAVE_NOTHING
// Run the media data is corrupted steps of the resource fetch algorithm.
// NOTE: This step is handled by HTMLMediaElement::mediaLoadingFailedFatally().
m_mediaElement->mediaLoadingFailedFatally(MediaPlayer::DecodeError);
}
} else if (!error.isEmpty()) {
// ↳ Otherwise
// Throw an INVALID_ACCESS_ERR exception.
ec = INVALID_ACCESS_ERR;
}
}