secondarymovie.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
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 * 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
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#ifndef NANCY_ACTION_SECONDARYMOVIE_H
#define NANCY_ACTION_SECONDARYMOVIE_H

#include "common/ptr.h"

#include "engines/nancy/action/actionrecord.h"
#include "engines/nancy/movieplayer.h"

namespace Nancy {
namespace Action {

class InteractiveVideo;

// Plays an AVF or Bink video. Optionally supports:
// - playing a sound;
// - reverse playback;
// - moving with the scene's background frame;
// - hiding of player cursor (and thus, disabling input);
// - setting event flags on a specific frame, as well as at the end of the video;
// - changing the scene after playback ends
// Mostly used for cinematics, with some occasional uses for background animations.
//
// Construct with `isRandom = true` for Nancy 11's AT_PLAY_RANDOM_MOVIE (AR 45):
// the chunk holds a list of sequences and one is picked at readData() time.
class PlaySecondaryMovie : public RenderActionRecord {
public:
    static const byte kMovieSceneChange         = 5;
    static const byte kMovieNoSceneChange       = 6;

    static const byte kPlayerCursorAllowed      = 1;
    static const byte kNoPlayerCursorAllowed    = 2;

    static const byte kPlayMovieForward         = 1;
    static const byte kPlayMovieReverse         = 2;

    struct FlagAtFrame {
        int16 frameID;
        FlagDescription flagDesc;
    };

    // Name of the next sequence to chain to once the current one finishes,
    // plus its selection weight in the weighted random pick.
    struct NextSequenceRef {
        Common::Path name;
        uint16 weight = 0;
    };

    // `name` is both the sequence id and the movie filename.
    struct RandomSequence {
        Common::Path name;
        uint16 startFrame = 0;
        uint16 lastFrame = 0;
        int32 minPauseMs = 0;
        int32 maxPauseMs = 0;
        // Weight assigned to "stay on this sequence" in the weighted random
        // pick. A roll inside [0, stayWeight) means "don't transition";
        // instead pause for [minPauseMs, maxPauseMs] and re-roll.
        uint16 stayWeight = 0;
        Common::Array<NextSequenceRef> nextSequences;
    };

    PlaySecondaryMovie(bool isRandom = false);
    virtual ~PlaySecondaryMovie();

    void init() override;
    void onPause(bool pause) override;

    void readData(Common::SeekableReadStream &stream) override;
    void execute() override;

    bool getIsFinished() const { return _isFinished; }

    // Enhancement: jump a cinematic straight to its end, as if it had finished
    // playing on its own. Only movies that hide the player cursor are skipped;
    // the rest are background animations the player isn't waiting on.
    void skip();

    Common::Path _videoName;
    Common::Path _paletteName;
    Common::Path _bitmapOverlayName;

    // Container the record asks for; only meaningful from Nancy7 to Nancy12.
    byte _videoPlaytype = kVideoPlaytypeAuto;

    uint16 _videoFormat = kLargeVideoFormat;
    uint16 _videoSceneChange = kMovieNoSceneChange;
    byte _playerCursorAllowed = kPlayerCursorAllowed;
    byte _playDirection = kPlayMovieForward;
    uint16 _firstFrame = 0;
    uint16 _lastFrame = 0;
    // Nancy14-only: when non-zero, hide the movie once it reaches its last frame.
    uint16 _hideOnFinish = 0;
    // Nancy15 AR 44: a "play style" selector (1 or 3). Read but currently
    // unused by playback.
    uint16 _playStyle = 1;

    // AR 47 "InteractiveVideo" (a PlaySecondaryMovie subclass): after the
    // normal AR-44-style movie data it carries a name, a flag byte, and a
    // list of named {value, flag} entries. Read but not yet acted on.
    struct InteractiveEntry {
        Common::Path name;
        uint32 value = 0;
        byte flag = 0;
    };
    Common::Path _interactiveName;
    bool _interactiveFlag = false;
    Common::Array<InteractiveEntry> _interactiveEntries;
    Common::Array<FlagAtFrame> _frameFlags;
    MultiEventFlagDescription _triggerFlags;
    FlagDescription _videoStartFlag;

    SoundDescription _sound;

    SceneChangeDescription _sceneChange;
    Common::Array<SecondaryVideoDescription> _videoDescs;

    MoviePlayer _decoder;

    // Random-movie state (only populated when _isRandom).
    bool _isRandom = false;
    // "RandomMovie" picks any sequence; otherwise it names the starting one.
    Common::String _startingSequenceName;
    uint16 _randomPlayerCursorAllowed = kPlayerCursorAllowed;
    Common::Array<RandomSequence> _sequences;

    // Nancy13+ carries one extra "secondary" movie after the sequence list: the
    // character's recognition animation, played while the mouse hovers it.
    RandomSequence _secondaryMovie;

    // Nancy13 talkable characters: the scene to open when the character is
    // clicked (its conversation). kNoScene means the character isn't clickable.
    uint16 _talkSceneID = kNoScene;
    // Hover cursor for the character (a raw Nancy13 cursor id from the chunk).
    uint16 _talkCursorType = 0;

    // Chain state. After a sequence's movie finishes the engine rolls a
    // weighted pick: "stay" -> enter pause for a random duration and
    // re-roll; valid next-sequence -> swap to that sequence's movie.
    enum RandomChainState { kRandomPlaying, kRandomPaused };
    int _activeSequenceIndex = -1;
    RandomChainState _randomChainState = kRandomPlaying;
    uint32 _randomPauseEndTime = 0;
    bool _randomStopRequested = false;

    // Talkable-character hover state: whether the mouse is over the character,
    // and whether the recognition (secondary) movie is currently playing.
    bool _isHovered = false;
    bool _playingSecondary = false;

    // Rewind state for the recognition movie. When the mouse leaves the
    // character the movie is played backwards to its first frame so the
    // character turns away again instead of snapping back to its idle pose.
    // Bink can't be played in reverse by the decoder, so the frames are
    // stepped through by hand.
    bool _secondaryRewinding = false;
    int _rewindFrame = 0;
    uint32 _rewindLastFrameTime = 0;
    uint32 _rewindFrameDelay = 66;

    // Called by PlayRandomMovieControl::execute() to wind down the AR.
    void stopRandom() { _randomStopRequested = true; }

    // Pick & start a fresh random sequence. No-op when not a random AR.
    void playRandomSequence();

    bool isViewportRelative() const override { return true; }

    bool survivesSceneChange(bool nextSceneIsNoArt) const override;

    // Nancy13 talkable characters expose the character's on-screen box as a
    // clickable hotspot with a talk cursor; clicking opens _talkSceneID, and
    // hovering plays the recognition ("turn around") movie.
    void handleInput(NancyInput &input) override;
    CursorManager::CursorType getHoverCursor() const override;
    bool cursorSetFromScript() const override { return _isRandom && _talkSceneID != kNoScene; }

    Common::String getRecordExtraInfo() const override { return Common::String::format("Scene %d", _sceneChange.sceneID); }

protected:
    Common::String getRecordTypeName() const override {
        return _isRandom ? "PlayRandomMovie" : "PlaySecondaryMovie";
    }

    // `ser` and `stream` must wrap the same input; `stream` is only
    // needed for SecondaryVideoDescription::readData.
    void readRandomMovieData(Common::Serializer &ser, Common::SeekableReadStream &stream);
    // Nancy14 reworked the random-movie layout (confirmed identical in Nancy15):
    // a larger header (shared with the non-random AR) and a tail of two
    // blt-descriptor lists separated by the recognition movie's name, in place
    // of Nancy13's secondaryMovie record + hotspot list.
    void readRandomMovieDataNancy14(Common::Serializer &ser, Common::SeekableReadStream &stream);
    void readRandomSequence(Common::Serializer &ser, RandomSequence &seq);
    void readSecondaryRandomMovie(Common::Serializer &ser, RandomSequence &seq);

    // Shared tail of the random-movie readers: pick the starting sequence
    // (random or by name) and seed the flat playback fields from it.
    void applyStartingRandomSequence();

    void readDataNancy14(Common::Serializer &ser, Common::SeekableReadStream &stream);

    // Apply a RandomSequence's playback config to the PSM flat fields
    // and reload the decoder. Returns true on success.
    bool activateRandomSequence(int index);

    // Load & start the recognition (secondary) movie in place of the idle loop.
    bool activateSecondaryMovie();

    // Start playing the recognition movie backwards from wherever it is now.
    void beginSecondaryRewind();
    // Advance the manual rewind; returns the frame to draw, or nullptr when
    // the next frame isn't due yet.
    const Graphics::Surface *updateSecondaryRewind();

    // A Nancy13 talkable character: has a conversation scene and a recognition
    // movie to swap to on hover.
    bool isTalkable() const { return _isRandom && _talkSceneID != kNoScene && !_secondaryMovie.name.empty(); }

    // Pick the next sequence (or "stay") per the weighted random rules.
    // Returns -1 if "stay" was picked (and sets up the pause state),
    // or the chosen sequence index otherwise.
    int rollNextSequence();

    // Enter the paused chain state for a random duration in the sequence's
    // [minPauseMs, maxPauseMs] range. Always returns -1.
    int beginRandomPause(const RandomSequence &seq);

    // Find a sequence by name, warning and returning -1 if it isn't present.
    int lookupSequence(const Common::Path &name) const;

    // Resolve the -1/-2 "whole movie" sentinels in _firstFrame/_lastFrame
    // against the loaded decoder's frame count. Random sequences only.
    void resolveSentinelFrames();

    Graphics::ManagedSurface _fullFrame;
    int _curViewportFrame = -1;
    bool _isFinished = false;
};

// Companion AR for the random-movie variant of PlaySecondaryMovie. When
// executed it stops the currently-active random PlaySecondaryMovie and
// optionally performs a scene change / event-flag set.
class PlayRandomMovieControl : public ActionRecord {
public:
    PlayRandomMovieControl() {}

    void readData(Common::SeekableReadStream &stream) override;
    void execute() override;

    enum RandomMovieControlMode : byte {
        kStopNow = 0,
        kStopAfterSequence = 1,
        kResume = 2
    };

protected:
    Common::String getRecordTypeName() const override { return "PlayRandomMovieControl"; }

    byte _mode = kStopNow;
    SceneChangeWithFlag _sceneChange;
};

} // End of namespace Action
} // End of namespace Nancy

#endif // NANCY_ACTION_SECONDARYMOVIE_H