if (ENABLE_VIDEO OR ENABLE_WEB_AUDIO)
    list(APPEND WebCore_PRIVATE_INCLUDE_DIRECTORIES
        "${WEBCORE_DIR}/platform/graphics/gstreamer"
        "${WEBCORE_DIR}/platform/graphics/gstreamer/mse"
        "${WEBCORE_DIR}/platform/graphics/gstreamer/eme"
    )

    list(APPEND WebCore_SOURCES
        Modules/webaudio/MediaStreamAudioSourceGStreamer.cpp
        platform/graphics/gstreamer/AudioTrackPrivateGStreamer.cpp
        platform/graphics/gstreamer/GLVideoSinkGStreamer.cpp
        platform/graphics/gstreamer/GRefPtrGStreamer.cpp
        platform/graphics/gstreamer/GStreamerAudioMixer.cpp
        platform/graphics/gstreamer/GStreamerCommon.cpp
        platform/graphics/gstreamer/GstAllocatorFastMalloc.cpp
        platform/graphics/gstreamer/GStreamerRegistryScanner.cpp
        platform/graphics/gstreamer/GStreamerVideoFrameHolder.cpp
        platform/graphics/gstreamer/ImageDecoderGStreamer.cpp
        platform/graphics/gstreamer/InbandTextTrackPrivateGStreamer.cpp
        platform/graphics/gstreamer/MediaEngineConfigurationFactoryGStreamer.cpp
        platform/graphics/gstreamer/MediaPlayerPrivateGStreamer.cpp
        platform/graphics/gstreamer/MediaSampleGStreamer.cpp
        platform/graphics/gstreamer/TextCombinerGStreamer.cpp
        platform/graphics/gstreamer/TextCombinerPadGStreamer.cpp
        platform/graphics/gstreamer/TextSinkGStreamer.cpp
        platform/graphics/gstreamer/TrackPrivateBaseGStreamer.cpp
        platform/graphics/gstreamer/VideoSinkGStreamer.cpp
        platform/graphics/gstreamer/VideoTrackPrivateGStreamer.cpp
        platform/graphics/gstreamer/WebKitAudioSinkGStreamer.cpp
        platform/graphics/gstreamer/WebKitWebSourceGStreamer.cpp

        platform/graphics/gstreamer/eme/GStreamerEMEUtilities.cpp
        platform/graphics/gstreamer/eme/WebKitClearKeyDecryptorGStreamer.cpp
        platform/graphics/gstreamer/eme/WebKitCommonEncryptionDecryptorGStreamer.cpp

        platform/graphics/gstreamer/mse/AppendPipeline.cpp
        platform/graphics/gstreamer/mse/GStreamerMediaDescription.cpp
        platform/graphics/gstreamer/mse/GStreamerRegistryScannerMSE.cpp
        platform/graphics/gstreamer/mse/MediaPlayerPrivateGStreamerMSE.cpp
        platform/graphics/gstreamer/mse/MediaSourcePrivateGStreamer.cpp
        platform/graphics/gstreamer/mse/MediaSourceTrackGStreamer.cpp
        platform/graphics/gstreamer/mse/SourceBufferPrivateGStreamer.cpp
        platform/graphics/gstreamer/mse/TrackQueue.cpp
        platform/graphics/gstreamer/mse/WebKitMediaSourceGStreamer.cpp

        platform/mediastream/libwebrtc/LibWebRTCAudioModule.cpp

        platform/mediastream/libwebrtc/gstreamer/GStreamerVideoCommon.cpp
        platform/mediastream/libwebrtc/gstreamer/GStreamerVideoDecoderFactory.cpp
        platform/mediastream/libwebrtc/gstreamer/GStreamerVideoEncoderFactory.cpp
        platform/mediastream/libwebrtc/gstreamer/GStreamerVideoFrameLibWebRTC.cpp
        platform/mediastream/libwebrtc/gstreamer/LibWebRTCProviderGStreamer.cpp
        platform/mediastream/libwebrtc/gstreamer/RealtimeIncomingAudioSourceLibWebRTC.cpp
        platform/mediastream/libwebrtc/gstreamer/RealtimeIncomingVideoSourceLibWebRTC.cpp
        platform/mediastream/libwebrtc/gstreamer/RealtimeOutgoingAudioSourceLibWebRTC.cpp
        platform/mediastream/libwebrtc/gstreamer/RealtimeOutgoingVideoSourceLibWebRTC.cpp

        platform/mediastream/gstreamer/GStreamerAudioCaptureSource.cpp
        platform/mediastream/gstreamer/GStreamerAudioCapturer.cpp
        platform/mediastream/gstreamer/GStreamerCaptureDeviceManager.cpp
        platform/mediastream/gstreamer/GStreamerCapturer.cpp
        platform/mediastream/gstreamer/GStreamerDisplayCaptureDeviceManager.cpp
        platform/mediastream/gstreamer/GStreamerMediaStreamSource.cpp
        platform/mediastream/gstreamer/GStreamerVideoCaptureSource.cpp
        platform/mediastream/gstreamer/GStreamerVideoCapturer.cpp
        platform/mediastream/gstreamer/GStreamerVideoEncoder.cpp
        platform/mediastream/gstreamer/MockRealtimeAudioSourceGStreamer.cpp
        platform/mediastream/gstreamer/MockRealtimeVideoSourceGStreamer.cpp
        platform/mediastream/gstreamer/RealtimeMediaSourceCenterGStreamer.cpp
    )

    list(APPEND WebCore_PRIVATE_FRAMEWORK_HEADERS
        platform/graphics/gstreamer/GRefPtrGStreamer.h
        platform/graphics/gstreamer/GStreamerCommon.h
        platform/graphics/gstreamer/GUniquePtrGStreamer.h
        platform/graphics/gstreamer/MediaPlayerRequestInstallMissingPluginsCallback.h

        platform/mediastream/libwebrtc/gstreamer/GStreamerVideoDecoderFactory.h
        platform/mediastream/libwebrtc/gstreamer/GStreamerVideoEncoderFactory.h
        platform/mediastream/libwebrtc/gstreamer/LibWebRTCProviderGStreamer.h
    )

    if (USE_GSTREAMER_FULL)
        list(APPEND WebCore_SYSTEM_INCLUDE_DIRECTORIES
            ${GSTREAMER_FULL_INCLUDE_DIRS}
        )
        list(APPEND WebCore_LIBRARIES
            ${GSTREAMER_FULL_LIBRARIES}
        )
    else ()
        list(APPEND WebCore_SYSTEM_INCLUDE_DIRECTORIES
            ${GSTREAMER_INCLUDE_DIRS}
            ${GSTREAMER_BASE_INCLUDE_DIRS}
            ${GSTREAMER_APP_INCLUDE_DIRS}
            ${GSTREAMER_PBUTILS_INCLUDE_DIRS}
        )

        list(APPEND WebCore_LIBRARIES
            ${GSTREAMER_APP_LIBRARIES}
            ${GSTREAMER_BASE_LIBRARIES}
            ${GSTREAMER_LIBRARIES}
            ${GSTREAMER_PBUTILS_LIBRARIES}
            ${GSTREAMER_AUDIO_LIBRARIES}
        )
    endif ()

    # Avoiding a GLib deprecation warning due to GStreamer API using deprecated classes.
    set_source_files_properties(platform/audio/gstreamer/WebKitWebAudioSourceGStreamer.cpp PROPERTIES COMPILE_DEFINITIONS "GLIB_DISABLE_DEPRECATION_WARNINGS=1")
endif ()

if (ENABLE_VIDEO)
    list(APPEND WebCore_SYSTEM_INCLUDE_DIRECTORIES
        ${GSTREAMER_TAG_INCLUDE_DIRS}
        ${GSTREAMER_VIDEO_INCLUDE_DIRS}
    )

    if (NOT USE_GSTREAMER_FULL)
        list(APPEND WebCore_LIBRARIES
           ${GSTREAMER_TAG_LIBRARIES}
           ${GSTREAMER_VIDEO_LIBRARIES}
        )
    endif ()

    if (USE_GSTREAMER_MPEGTS AND NOT USE_GSTREAMER_FULL)
        list(APPEND WebCore_SYSTEM_INCLUDE_DIRECTORIES
            ${GSTREAMER_MPEGTS_INCLUDE_DIRS}
        )
        list(APPEND WebCore_LIBRARIES
            ${GSTREAMER_MPEGTS_LIBRARIES}
        )
    endif ()

    if (USE_GSTREAMER_GL)
        if (NOT USE_GSTREAMER_FULL)
            list(APPEND WebCore_SYSTEM_INCLUDE_DIRECTORIES
                ${GSTREAMER_GL_INCLUDE_DIRS}
            )
            list(APPEND WebCore_LIBRARIES
                ${GSTREAMER_GL_LIBRARIES}
            )
        endif ()
        list(APPEND WebCore_SOURCES
            platform/graphics/gstreamer/PlatformDisplayGStreamer.cpp
            platform/graphics/gstreamer/VideoTextureCopierGStreamer.cpp
        )
    endif ()

    if (ENABLE_MEDIA_STREAM OR ENABLE_WEB_RTC)
        list(APPEND WebCore_SYSTEM_INCLUDE_DIRECTORIES
            ${GSTREAMER_CODECPARSERS_INCLUDE_DIRS}
        )
        if (NOT USE_GSTREAMER_FULL)
            list(APPEND WebCore_LIBRARIES
                ${GSTREAMER_CODECPARSERS_LIBRARIES}
            )
        endif ()
    endif ()
endif ()

if (ENABLE_WEB_AUDIO)
    list(APPEND WebCore_PRIVATE_INCLUDE_DIRECTORIES
        "${WEBCORE_DIR}/platform/audio/gstreamer"
    )

    list(APPEND WebCore_SOURCES
        platform/audio/gstreamer/AudioDestinationGStreamer.cpp
        platform/audio/gstreamer/AudioFileReaderGStreamer.cpp
        platform/audio/gstreamer/AudioSourceProviderGStreamer.cpp
        platform/audio/gstreamer/FFTFrameGStreamer.cpp
        platform/audio/gstreamer/WebKitWebAudioSourceGStreamer.cpp
    )

    if (NOT USE_GSTREAMER_FULL)
        list(APPEND WebCore_SYSTEM_INCLUDE_DIRECTORIES
            ${GSTREAMER_AUDIO_INCLUDE_DIRS}
            ${GSTREAMER_FFT_INCLUDE_DIRS}
        )

        list(APPEND WebCore_LIBRARIES
            ${GSTREAMER_FFT_LIBRARIES}
        )
    endif ()
endif ()

if (ENABLE_ENCRYPTED_MEDIA)
    list(APPEND WebCore_SOURCES
        platform/graphics/gstreamer/eme/CDMFactoryGStreamer.cpp
        platform/graphics/gstreamer/eme/CDMProxyClearKey.cpp
    )

    if (ENABLE_THUNDER)
        list(APPEND WebCore_SYSTEM_INCLUDE_DIRECTORIES
            ${THUNDER_INCLUDE_DIRS}
        )

        list(APPEND WebCore_LIBRARIES
            ${THUNDER_LIBRARIES}
        )

        list(APPEND WebCore_SOURCES
            platform/graphics/gstreamer/eme/CDMProxyThunder.cpp
            platform/graphics/gstreamer/eme/CDMThunder.cpp
            platform/graphics/gstreamer/eme/WebKitThunderDecryptorGStreamer.cpp
        )
    endif ()
endif ()

if (USE_CAIRO)
    list(APPEND WebCore_SOURCES
        platform/graphics/gstreamer/ImageGStreamerCairo.cpp
    )
endif ()