oak-editor/app/node/block/clip/clip.h

/*
 * Olive Community Edition - Non-Linear Video Editor
 * Copyright (C) 2025 Olive CE Team
 *
 * 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 CLIPBLOCK_H
#define CLIPBLOCK_H

#include "audio/audiovisualwaveform.h"
#include "codec/decoder.h"
#include "node/block/block.h"
#include "node/input/multicam/multicamnode.h"
#include "node/output/track/track.h"

namespace olive
{

class ViewerOutput;

/**
 * @brief Node that represents a block of Media
 */
class ClipBlock : public Block {
	Q_OBJECT
public:
	ClipBlock();

	NODE_DEFAULT_FUNCTIONS(ClipBlock)

	virtual QString Name() const override;
	virtual QString id() const override;
	virtual QString Description() const override;

	virtual void set_length_and_media_out(const rational &length) override;
	virtual void set_length_and_media_in(const rational &length) override;

	Track::Type GetTrackType() const
	{
		if (track()) {
			return track()->type();
		} else {
			return Track::kNone;
		}
	}

	rational media_in() const;
	void set_media_in(const rational &media_in);

	bool IsAutocaching() const
	{
		return GetStandardValue(kAutoCacheInput).toBool();
	}
	void SetAutocache(bool e);

	void DiscardCache();

	virtual void InvalidateCache(const TimeRange &range, const QString &from,
								 int element,
								 InvalidateCacheOptions options) override;

	virtual TimeRange InputTimeAdjustment(const QString &input, int element,
										  const TimeRange &input_time,
										  bool clamp) const override;

	virtual TimeRange
	OutputTimeAdjustment(const QString &input, int element,
						 const TimeRange &input_time) const override;

	virtual void Value(const NodeValueRow &value, const NodeGlobals &globals,
					   NodeValueTable *table) const override;

	virtual void Retranslate() override;

	void
	RequestInvalidatedFromConnected(bool force_all = false,
									const TimeRange &intersect = TimeRange());

	double speed() const
	{
		return GetStandardValue(kSpeedInput).toDouble();
	}

	bool reverse() const
	{
		return GetStandardValue(kReverseInput).toBool();
	}

	void set_reverse(bool e)
	{
		SetStandardValue(kReverseInput, e);
	}

	bool maintain_audio_pitch() const
	{
		return GetStandardValue(kMaintainAudioPitchInput).toBool();
	}

	void set_maintain_audio_pitch(bool e)
	{
		SetStandardValue(kMaintainAudioPitchInput, e);
	}

	TransitionBlock *in_transition()
	{
		return in_transition_;
	}

	void set_in_transition(TransitionBlock *t)
	{
		in_transition_ = t;
	}

	TransitionBlock *out_transition()
	{
		return out_transition_;
	}

	void set_out_transition(TransitionBlock *t)
	{
		out_transition_ = t;
	}

	const QVector<Block *> &block_links() const
	{
		return block_links_;
	}

	FrameHashCache *connected_video_cache() const
	{
		if (Node *n = GetConnectedOutput(kBufferIn)) {
			return n->video_frame_cache();
		} else {
			return nullptr;
		}
	}

	AudioPlaybackCache *connected_audio_cache() const
	{
		if (Node *n = GetConnectedOutput(kBufferIn)) {
			return n->audio_playback_cache();
		} else {
			return nullptr;
		}
	}

	FrameHashCache *thumbnails()
	{
		if (Node *n = GetConnectedOutput(kBufferIn)) {
			return n->thumbnail_cache();
		} else {
			return nullptr;
		}
	}

	AudioWaveformCache *waveform()
	{
		if (Node *n = GetConnectedOutput(kBufferIn)) {
			return n->waveform_cache();
		} else {
			return nullptr;
		}
	}

	void AddCachePassthroughFrom(ClipBlock *other);

	ViewerOutput *connected_viewer() const
	{
		return connected_viewer_;
	}

	virtual TimeRange GetVideoCacheRange() const override
	{
		return TimeRange(0, length());
	}

	virtual TimeRange GetAudioCacheRange() const override
	{
		return TimeRange(0, length());
	}

	virtual void ConnectedToPreviewEvent() override;

	TimeRange media_range() const;

	/**
   * @brief Get currently set loop mode
   */
	LoopMode loop_mode() const
	{
		return static_cast<LoopMode>(GetStandardValue(kLoopModeInput).toInt());
	}

	void set_loop_mode(LoopMode l)
	{
		SetStandardValue(kLoopModeInput, int(l));
	}

	MultiCamNode *FindMulticam();

	static const QString kBufferIn;
	static const QString kMediaInInput;
	static const QString kSpeedInput;
	static const QString kReverseInput;
	static const QString kMaintainAudioPitchInput;
	static const QString kLoopModeInput;

	static const QString kAutoCacheInput;

protected:
	virtual void LinkChangeEvent() override;

	virtual void InputConnectedEvent(const QString &input, int element,
									 Node *output) override;

	virtual void InputDisconnectedEvent(const QString &input, int element,
										Node *output) override;

	virtual void InputValueChangedEvent(const QString &input,
										int element) override;

private:
	enum SequenceToMediaTimeFlag {
		kSTMNone = 0x0,
		kSTMIgnoreReverse = 0x1,
		kSTMIgnoreSpeed = 0x2,
		kSTMIgnoreLoop = 0x4
	};

	rational SequenceToMediaTime(const rational &sequence_time,
								 uint64_t flags = kSTMNone) const;

	rational MediaToSequenceTime(const rational &media_time) const;

	void RequestRangeFromConnected(const TimeRange &range);

	void RequestRangeForCache(PlaybackCache *cache, const TimeRange &max_range,
							  const TimeRange &range, bool invalidate,
							  bool request);
	void RequestInvalidatedForCache(PlaybackCache *cache,
									const TimeRange &max_range);

	bool GetAdjustedThumbnailRange(TimeRange *r) const;

	QVector<Block *> block_links_;

	TransitionBlock *in_transition_;
	TransitionBlock *out_transition_;

	ViewerOutput *connected_viewer_;

private:
	rational last_media_in_;
};

}

#endif // TIMELINEBLOCK_H