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/*
* Copyright (C) 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. AND ITS CONTRIBUTORS ``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 ITS 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 "MediaSampleConverter.h"
#include <WebCore/MediaSample.h>
#include <WebCore/MediaSamplesBlock.h>
#include <wtf/TZoneMallocInlines.h>
#if PLATFORM(COCOA)
#include <CoreMedia/CMFormatDescription.h>
#include <pal/cf/CoreMediaSoftLink.h>
#endif
namespace WebCore {
WTF_MAKE_TZONE_ALLOCATED_IMPL(MediaSampleConverter);
MediaSampleConverter::MediaSampleConverter() = default;
MediaSampleConverter::~MediaSampleConverter() = default;
static bool hasSameInitSegment(const MediaSample& sampleA, const MediaSample& sampleB)
{
#if PLATFORM(COCOA)
RetainPtr cmSampleA = sampleA.platformSample().cmSampleBuffer();
RetainPtr cmSampleB = sampleB.platformSample().cmSampleBuffer();
RetainPtr descriptionA = PAL::CMSampleBufferGetFormatDescription(cmSampleA.get());
RetainPtr descriptionB = PAL::CMSampleBufferGetFormatDescription(cmSampleB.get());
return descriptionA == descriptionB;
#else
UNUSED_PARAM(sampleA);
UNUSED_PARAM(sampleB);
return false;
#endif
}
UniqueRef<MediaSamplesBlock> MediaSampleConverter::convert(const MediaSample& sample, SetTrackInfo setTrackInfo)
{
bool canReuseLastTrackInfo = m_lastSample && hasSameInitSegment(sample, Ref { *m_lastSample });
auto block = MediaSamplesBlock::fromMediaSample(sample, canReuseLastTrackInfo ? m_lastTrackInfo.get() : nullptr);
if (!canReuseLastTrackInfo) {
m_lastTrackInfo = block->info();
m_lastSample = &sample;
}
if (setTrackInfo == SetTrackInfo::No)
block->setInfo(nullptr);
return block;
}
RefPtr<MediaSample> MediaSampleConverter::convert(MediaSamplesBlock&& block)
{
ASSERT(m_lastTrackInfo || block.info());
if (!block.info())
block.setInfo(m_lastTrackInfo.get());
RefPtr sample = block.toMediaSample(m_lastSample.get());
if (!m_lastSample)
m_lastSample = sample;
return sample;
}
bool MediaSampleConverter::hasFormatChanged(const MediaSample& sample)
{
if (RefPtr lastSample = m_lastSample)
return !hasSameInitSegment(*lastSample, sample);
return true;
}
RefPtr<const TrackInfo> MediaSampleConverter::currentTrackInfo() const
{
return m_lastTrackInfo;
}
void MediaSampleConverter::setTrackInfo(Ref<const TrackInfo>&& trackInfo)
{
if (m_lastTrackInfo && trackInfo.get() != *m_lastTrackInfo)
m_lastSample = nullptr;
m_lastTrackInfo = WTFMove(trackInfo);
}
}
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