Source/WebCore/Modules/mediastream/libwebrtc/LibWebRTCRtpTransformableFrame.cpp

/*
 * Copyright (C) 2020 Apple Inc.
 *
 * 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 "LibWebRTCRtpTransformableFrame.h"

#if ENABLE(WEB_RTC) && USE(LIBWEBRTC)

ALLOW_UNUSED_PARAMETERS_BEGIN
ALLOW_DEPRECATED_DECLARATIONS_BEGIN

#include <webrtc/api/frame_transformer_interface.h>

ALLOW_DEPRECATED_DECLARATIONS_END
ALLOW_UNUSED_PARAMETERS_END

namespace WebCore {

LibWebRTCRtpTransformableFrame::LibWebRTCRtpTransformableFrame(std::unique_ptr<webrtc::TransformableFrameInterface>&& frame, bool isAudioSenderFrame)
    : m_rtcFrame(WTFMove(frame))
    , m_isAudioSenderFrame(isAudioSenderFrame)
{
}

LibWebRTCRtpTransformableFrame::~LibWebRTCRtpTransformableFrame()
{
}

std::unique_ptr<webrtc::TransformableFrameInterface> LibWebRTCRtpTransformableFrame::takeRTCFrame()
{
    return WTFMove(m_rtcFrame);
}

Span<const uint8_t> LibWebRTCRtpTransformableFrame::data() const
{
    if (!m_rtcFrame)
        return { };
    auto data = m_rtcFrame->GetData();
    return { data.begin(), data.size() };
}

void LibWebRTCRtpTransformableFrame::setData(Span<const uint8_t> data)
{
    if (m_rtcFrame)
        m_rtcFrame->SetData({ data.data(), data.size() });
}

bool LibWebRTCRtpTransformableFrame::isKeyFrame() const
{
    ASSERT(m_rtcFrame);
    auto* videoFrame = static_cast<webrtc::TransformableVideoFrameInterface*>(m_rtcFrame.get());
    return videoFrame && videoFrame->IsKeyFrame();
}

uint64_t LibWebRTCRtpTransformableFrame::timestamp() const
{
    return m_rtcFrame ? m_rtcFrame->GetTimestamp() : 0;
}

RTCEncodedAudioFrameMetadata LibWebRTCRtpTransformableFrame::audioMetadata() const
{
    if (!m_rtcFrame)
        return { };

    Vector<uint32_t> cssrcs;
    if (!m_isAudioSenderFrame) {
        auto* audioFrame = static_cast<webrtc::TransformableAudioFrameInterface*>(m_rtcFrame.get());
        auto& header = audioFrame->GetHeader();
        if (header.numCSRCs) {
            cssrcs.reserveInitialCapacity(header.numCSRCs);
            for (size_t cptr = 0; cptr < header.numCSRCs; ++cptr)
                cssrcs.uncheckedAppend(header.arrOfCSRCs[cptr]);
        }
    }
    return { m_rtcFrame->GetSsrc(), WTFMove(cssrcs) };
}

RTCEncodedVideoFrameMetadata LibWebRTCRtpTransformableFrame::videoMetadata() const
{
    if (!m_rtcFrame)
        return { };
    auto* videoFrame = static_cast<webrtc::TransformableVideoFrameInterface*>(m_rtcFrame.get());
    auto& metadata = videoFrame->GetMetadata();

    std::optional<int64_t> frameId;
    if (metadata.GetFrameId())
        frameId = *metadata.GetFrameId();

    Vector<int64_t> dependencies;
    for (auto value : metadata.GetFrameDependencies())
        dependencies.append(value);

    return { frameId, WTFMove(dependencies), metadata.GetWidth(), metadata.GetHeight(), metadata.GetSpatialIndex(), metadata.GetTemporalIndex(), m_rtcFrame->GetSsrc() };
}

} // namespace WebCore

#endif // ENABLE(WEB_RTC) && USE(LIBWEBRTC)