movie.h

/* ScummVM - Graphic Adventure Engine
 *
 * ScummVM is the legal property of its developers, whose names
 * are too numerous to list here. Please refer to the COPYRIGHT
 * file distributed with this source distribution.
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 */

#ifndef MEDIASTATION_MOVIE_H
#define MEDIASTATION_MOVIE_H

#include "common/array.h"

#include "mediastation/actor.h"
#include "mediastation/audio.h"
#include "mediastation/datafile.h"
#include "mediastation/bitmap.h"
#include "mediastation/mediascript/scriptconstants.h"

namespace MediaStation {

enum MovieBlitType {
    kInvalidMovieBlit = 0,
    kUncompressedMovieBlit = 1,
    kUncompressedDeltaMovieBlit = 2,
    kCompressedDeltaMovieBlit = 3,
};

class MovieFrameImage : public PixMapImage {
public:
    MovieFrameImage(Chunk &chunk, uint index, uint keyframeEndInMilliseconds, const ImageInfo &imageInfo);

    uint _index = 0;
    uint _keyframeEndInMilliseconds = 0;
};

enum MovieSectionType {
    kMovieRootSection = 0x06a8,
    kMovieImageDataSection = 0x06a9,
    kMovieFrameDataSection = 0x06aa,
    kMovieChunkMarkerSection = 0x06ab
};

struct MovieFrame {
    MovieFrame(Chunk &chunk);
    uint unk3 = 0;
    uint unk4 = 0;
    uint layerId = 0;
    uint startInMilliseconds = 0;
    uint endInMilliseconds = 0;
    Common::Point leftTop;
    Common::Point diffBetweenKeyframeAndFrame;
    MovieBlitType blitType = kInvalidMovieBlit;
    int16 zIndex = 0;
    uint keyframeIndex = 0;
    bool keepAfterEnd = false;
    uint index = 0;
    MovieFrameImage *image = nullptr;
    MovieFrameImage *keyframeImage = nullptr;
};

class StreamMovieActor;

// Represents an individually controllable layer of a stream movie that is its own spatial entity
// and can be in a different stage than its parent stream movie, but which references the parent's
// frames at all times. Only frames with a layer ID matching a proxy's layer ID will be drawn when
// that proxy is drawn. For example, this is used in the last section of the Dalmatians hide-and-seek
// minigame to show a "light" layer that only appears when the player shines a flashlight on an area,
// while a "dark" layer seamlessly displays otherwise.
class StreamMovieProxy : public SpatialEntity {
friend class StreamMovieActor;

public:
    StreamMovieProxy(Chunk &chunk, StreamMovieActor *parent);
    virtual void draw(DisplayContext &displayContext) override;
    virtual bool isVisible() const override;

    uint _layerId = 0;
    uint _scriptId = 0;

private:
    StreamMovieActor *_parent = nullptr;
};

// This is called `RT_stmvFrames` in the original.
class StreamMovieActorFrames : public ChannelClient {
public:
    StreamMovieActorFrames(StreamMovieActor *parent) : ChannelClient(), _parent(parent) {}
    ~StreamMovieActorFrames();

    virtual void readChunk(Chunk &chunk) override;

    Common::Array<MovieFrame *> _frames;
    Common::Array<MovieFrameImage *> _images;

private:
    StreamMovieActor *_parent = nullptr;

    void readImageData(Chunk &chunk);
    void readFrameData(Chunk &chunk);
};

// This is called `RT_stmvSound` in the original.
class StreamMovieActorSound : public ChannelClient {
public:
    ~StreamMovieActorSound();
    virtual void readChunk(Chunk &chunk) override;

    AudioSequence _audioSequence;
};

class StreamMovieActor : public SpatialEntity, public ChannelClient {
friend class StreamMovieActorFrames;
friend class StreamMovieActorSound;

public:
    StreamMovieActor();
    virtual ~StreamMovieActor() override;

    virtual void readChunk(Chunk &chunk) override;
    virtual void loadIsComplete() override;
    virtual void readParameter(Chunk &chunk, ActorHeaderSectionType paramType) override;
    virtual ScriptValue callMethod(BuiltInMethod methodId, Common::Array<ScriptValue> &args) override;
    virtual void process() override;

    virtual void draw(DisplayContext &displayContext) override;
    void drawLayer(DisplayContext &displayContext, uint layerId);
    virtual void invalidateLocalBounds() override;
    bool isLayerInSeparateZPlane(uint layerId);

private:
    ImtStreamFeed *_streamFeed = nullptr;
    uint _fullTime = 0;
    uint _chunkCount = 0;
    double _frameRate = 0;

    bool _shouldCache = false;
    bool _isPlaying = false;
    bool _hasStill = false;

    StreamMovieActorFrames *_streamFrames = nullptr;
    StreamMovieActorSound *_streamSound = nullptr;

    Common::Array<MovieFrame *> _framesNotYetShown;
    Common::Array<StreamMovieProxy *> _proxies;
    Common::SortedArray<MovieFrame *, const MovieFrame *> _framesOnScreen;

    // Script method implementations.
    void timePlay();
    void timeStop();

    void setVisibility(bool visibility);
    void updateFrameState();
    void invalidateRect(const Common::Rect &rect);
    void decompressIntoAuxImage(MovieFrame *frame);

    void parseMovieHeader(Chunk &chunk);
    void parseMovieChunkMarker(Chunk &chunk);

    Common::Rect getFrameBoundingBox(MovieFrame *frame);
    StreamMovieProxy *proxyOfId(uint layerId);
    StreamMovieProxy *proxyOfScriptId(uint scriptId);
    static int compareFramesByZIndex(const MovieFrame *a, const MovieFrame *b);
};

} // End of namespace MediaStation

#endif