/*
 * Copyright (C) 2007, 2009 Apple Inc.  All rights reserved.
 * Copyright (C) 2007 Collabora Ltd. All rights reserved.
 * Copyright (C) 2007 Alp Toker <alp@atoker.com>
 * Copyright (C) 2009, 2010, 2015, 2016 Igalia S.L
 * Copyright (C) 2015, 2016 Metrological Group B.V.
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Library General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Library General Public License for more details.
 *
 * You should have received a copy of the GNU Library General Public License
 * aint with this library; see the file COPYING.LIB.  If not, write to
 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
 * Boston, MA 02110-1301, USA.
 */

#ifndef MediaPlayerPrivateGStreamerBase_h
#define MediaPlayerPrivateGStreamerBase_h
#if ENABLE(VIDEO) && USE(GSTREAMER)

#include "GRefPtrGStreamer.h"
#include "MainThreadNotifier.h"
#include "MediaPlayerPrivate.h"
#include "PlatformLayer.h"
#include <glib.h>
#include <gst/gst.h>
#include <wtf/Condition.h>
#include <wtf/Forward.h>
#include <wtf/RunLoop.h>

#if USE(TEXTURE_MAPPER)
#include "TextureMapperPlatformLayer.h"
#include "TextureMapperPlatformLayerProxy.h"
#endif

typedef struct _GstStreamVolume GstStreamVolume;
typedef struct _GstVideoInfo GstVideoInfo;
typedef struct _GstGLContext GstGLContext;
typedef struct _GstGLDisplay GstGLDisplay;

namespace WebCore {

class BitmapTextureGL;
class GLContext;
class GraphicsContext;
class GraphicsContext3D;
class IntSize;
class IntRect;
class VideoTextureCopierGStreamer;

void registerWebKitGStreamerElements();

class MediaPlayerPrivateGStreamerBase : public MediaPlayerPrivateInterface
#if USE(COORDINATED_GRAPHICS_THREADED) || (USE(TEXTURE_MAPPER_GL) && !USE(COORDINATED_GRAPHICS))
    , public PlatformLayer
#endif
{

public:
    virtual ~MediaPlayerPrivateGStreamerBase();

    FloatSize naturalSize() const override;

    void setVolume(float) override;
    virtual float volume() const;

#if USE(GSTREAMER_GL)
    bool ensureGstGLContext();
    static GstContext* requestGLContext(const gchar* contextType, MediaPlayerPrivateGStreamerBase*);
#endif

    bool supportsMuting() const override { return true; }
    void setMuted(bool) override;
    bool muted() const;

    MediaPlayer::NetworkState networkState() const override;
    MediaPlayer::ReadyState readyState() const override;

    void setVisible(bool) override { }
    void setSize(const IntSize&) override;
    void sizeChanged();

    void paint(GraphicsContext&, const FloatRect&) override;

    bool hasSingleSecurityOrigin() const override { return true; }
    virtual float maxTimeLoaded() const { return 0.0; }

    bool supportsFullscreen() const override;
    PlatformMedia platformMedia() const override;

    MediaPlayer::MovieLoadType movieLoadType() const override;
    virtual bool isLiveStream() const = 0;

    MediaPlayer* mediaPlayer() const { return m_player; }

    unsigned decodedFrameCount() const override;
    unsigned droppedFrameCount() const override;
    unsigned audioDecodedByteCount() const override;
    unsigned videoDecodedByteCount() const override;

    void acceleratedRenderingStateChanged() override;

#if USE(TEXTURE_MAPPER_GL) && !USE(COORDINATED_GRAPHICS)
    PlatformLayer* platformLayer() const override { return const_cast<MediaPlayerPrivateGStreamerBase*>(this); }
#if PLATFORM(WIN_CAIRO)
    // FIXME: Accelerated rendering has not been implemented for WinCairo yet.
    bool supportsAcceleratedRendering() const override { return false; }
#else
    bool supportsAcceleratedRendering() const override { return true; }
#endif
    void paintToTextureMapper(TextureMapper&, const FloatRect&, const TransformationMatrix&, float) override;
#endif

#if USE(COORDINATED_GRAPHICS_THREADED)
    PlatformLayer* platformLayer() const override { return const_cast<MediaPlayerPrivateGStreamerBase*>(this); }
    bool supportsAcceleratedRendering() const override { return true; }
#endif

#if ENABLE(LEGACY_ENCRYPTED_MEDIA)
    void needKey(RefPtr<Uint8Array>);
    void setCDMSession(CDMSession*) override;
    void keyAdded() override;
    virtual void dispatchDecryptionKey(GstBuffer*);
    void handleProtectionEvent(GstEvent*);
    void receivedGenerateKeyRequest(const String&);
#endif

    static bool supportsKeySystem(const String& keySystem, const String& mimeType);
    static MediaPlayer::SupportsType extendedSupportsType(const MediaEngineSupportParameters&, MediaPlayer::SupportsType);

#if USE(GSTREAMER_GL)
    bool copyVideoTextureToPlatformTexture(GraphicsContext3D*, Platform3DObject, GC3Denum, GC3Dint, GC3Denum, GC3Denum, GC3Denum, bool, bool) override;
    NativeImagePtr nativeImageForCurrentTime() override;
#endif

    void setVideoSourceOrientation(const ImageOrientation&);
    GstElement* pipeline() const { return m_pipeline.get(); }

    virtual bool handleSyncMessage(GstMessage*);

protected:
    MediaPlayerPrivateGStreamerBase(MediaPlayer*);
    virtual GstElement* createVideoSink();

#if USE(GSTREAMER_GL)
    static GstFlowReturn newSampleCallback(GstElement*, MediaPlayerPrivateGStreamerBase*);
    static GstFlowReturn newPrerollCallback(GstElement*, MediaPlayerPrivateGStreamerBase*);
    GstElement* createGLAppSink();
    GstElement* createVideoSinkGL();
    GstGLContext* gstGLContext() const { return m_glContext.get(); }
    GstGLDisplay* gstGLDisplay() const { return m_glDisplay.get(); }
#if USE(CAIRO) && ENABLE(ACCELERATED_2D_CANVAS)
    GLContext* prepareContextForCairoPaint(GstVideoInfo&, IntSize&, IntSize&);
    bool paintToCairoSurface(cairo_surface_t*, cairo_device_t*, GstVideoInfo&, const IntSize&, const IntSize&, bool);
#endif
#endif

    GstElement* videoSink() const { return m_videoSink.get(); }

    void setStreamVolumeElement(GstStreamVolume*);
    virtual GstElement* createAudioSink() { return 0; }
    virtual GstElement* audioSink() const { return 0; }

    void setPipeline(GstElement*);

    void triggerRepaint(GstSample*);
    void repaint();
    void cancelRepaint();

    static void repaintCallback(MediaPlayerPrivateGStreamerBase*, GstSample*);
    static void repaintCancelledCallback(MediaPlayerPrivateGStreamerBase*);

    void notifyPlayerOfVolumeChange();
    void notifyPlayerOfMute();

    static void volumeChangedCallback(MediaPlayerPrivateGStreamerBase*);
    static void muteChangedCallback(MediaPlayerPrivateGStreamerBase*);

    enum MainThreadNotification {
        VideoChanged = 1 << 0,
        VideoCapsChanged = 1 << 1,
        AudioChanged = 1 << 2,
        VolumeChanged = 1 << 3,
        MuteChanged = 1 << 4,
#if ENABLE(VIDEO_TRACK)
        TextChanged = 1 << 5,
#endif
        SizeChanged = 1 << 6
    };

    Ref<MainThreadNotifier<MainThreadNotification>> m_notifier;
    MediaPlayer* m_player;
    GRefPtr<GstElement> m_pipeline;
    GRefPtr<GstStreamVolume> m_volumeElement;
    GRefPtr<GstElement> m_videoSink;
    GRefPtr<GstElement> m_fpsSink;
    MediaPlayer::ReadyState m_readyState;
    mutable MediaPlayer::NetworkState m_networkState;
    IntSize m_size;
    mutable GMutex m_sampleMutex;
    GRefPtr<GstSample> m_sample;
#if USE(GSTREAMER_GL) || USE(COORDINATED_GRAPHICS_THREADED)
    RunLoop::Timer<MediaPlayerPrivateGStreamerBase> m_drawTimer;
#endif
    mutable FloatSize m_videoSize;
    bool m_usingFallbackVideoSink;
    bool m_renderingCanBeAccelerated { false };
#if USE(TEXTURE_MAPPER_GL)
    void updateTexture(BitmapTextureGL&, GstVideoInfo&);
#endif
#if USE(GSTREAMER_GL)
    GRefPtr<GstGLContext> m_glContext;
    GRefPtr<GstGLDisplay> m_glDisplay;
#endif

#if USE(COORDINATED_GRAPHICS_THREADED)
    RefPtr<TextureMapperPlatformLayerProxy> proxy() const override { return m_platformLayerProxy.copyRef(); }
    void swapBuffersIfNeeded() override { };
    void pushTextureToCompositor();
    RefPtr<TextureMapperPlatformLayerProxy> m_platformLayerProxy;
#endif

#if USE(GSTREAMER_GL) || USE(COORDINATED_GRAPHICS_THREADED)
    RefPtr<GraphicsContext3D> m_context3D;
    Condition m_drawCondition;
    Lock m_drawMutex;
#endif

    ImageOrientation m_videoSourceOrientation;
#if ENABLE(LEGACY_ENCRYPTED_MEDIA)
    std::unique_ptr<CDMSession> createSession(const String&, CDMSessionClient*) override;
    CDMSession* m_cdmSession;
    Lock m_protectionMutex;
    Condition m_protectionCondition;
    String m_lastGenerateKeyRequestKeySystemUuid;
    HashSet<uint32_t> m_handledProtectionEvents;
#endif
#if USE(GSTREAMER_GL)
    std::unique_ptr<VideoTextureCopierGStreamer> m_videoTextureCopier;
#endif
};

}

#endif // USE(GSTREAMER)
#endif