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/*
* Copyright (C) 2012-2025 Apple Inc. All rights reserved.
*
* 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.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``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 APPLE INC. OR
* CONTRIBUTORS 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.
*/
#include "config.h"
#include "InbandWebVTTTextTrack.h"
#if ENABLE(VIDEO)
#include "InbandTextTrackPrivate.h"
#include "Logging.h"
#include "ScriptExecutionContext.h"
#include "VTTCue.h"
#include "VTTRegionList.h"
#include <wtf/TZoneMallocInlines.h>
#include <wtf/text/CString.h>
namespace WebCore {
WTF_MAKE_TZONE_OR_ISO_ALLOCATED_IMPL(InbandWebVTTTextTrack);
inline InbandWebVTTTextTrack::InbandWebVTTTextTrack(ScriptExecutionContext& context, InbandTextTrackPrivate& trackPrivate)
: InbandTextTrack(context, trackPrivate)
{
}
Ref<InbandTextTrack> InbandWebVTTTextTrack::create(ScriptExecutionContext& context, InbandTextTrackPrivate& trackPrivate)
{
auto textTrack = adoptRef(*new InbandWebVTTTextTrack(context, trackPrivate));
textTrack->suspendIfNeeded();
return textTrack;
}
InbandWebVTTTextTrack::~InbandWebVTTTextTrack() = default;
WebVTTParser& InbandWebVTTTextTrack::parser()
{
ASSERT(is<Document>(scriptExecutionContext()));
if (!m_webVTTParser)
m_webVTTParser = makeUnique<WebVTTParser>(static_cast<WebVTTParserClient&>(*this), downcast<Document>(*scriptExecutionContext()));
return *m_webVTTParser;
}
void InbandWebVTTTextTrack::parseWebVTTFileHeader(String&& header)
{
parser().parseFileHeader(WTFMove(header));
}
void InbandWebVTTTextTrack::parseWebVTTCueData(std::span<const uint8_t> data)
{
parser().parseBytes(data);
}
void InbandWebVTTTextTrack::parseWebVTTCueData(ISOWebVTTCue&& cueData)
{
parser().parseCueData(WTFMove(cueData));
}
void InbandWebVTTTextTrack::newCuesParsed()
{
RefPtr document = dynamicDowncast<Document>(scriptExecutionContext());
if (!document)
return;
for (auto& cueData : parser().takeCues()) {
auto cue = VTTCue::create(*document, cueData);
auto existingCue = matchCue(cue, TextTrackCue::IgnoreDuration);
if (!existingCue) {
INFO_LOG(LOGIDENTIFIER, cue.get());
addCue(WTFMove(cue));
continue;
}
if (existingCue->endTime() >= cue->endTime()) {
INFO_LOG(LOGIDENTIFIER, "ignoring already added cue: ", cue.get());
continue;
}
ALWAYS_LOG(LOGIDENTIFIER, "extending endTime of existing cue: ", *existingCue, " to ", cue->endTime());
existingCue->setEndTime(cue->endTime());
}
}
void InbandWebVTTTextTrack::newRegionsParsed()
{
for (auto& region : parser().takeRegions())
regions()->add(WTFMove(region));
}
void InbandWebVTTTextTrack::newStyleSheetsParsed()
{
}
void InbandWebVTTTextTrack::fileFailedToParse()
{
ERROR_LOG(LOGIDENTIFIER, "Error parsing WebVTT stream.");
}
} // namespace WebCore
#endif
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